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  Topic: [Xansys] Transient thermal Analysis
mike.yaksh

Replies: 3
Views: 4491

PostForum: XANSYS   Posted: Wed May 27, 2015 8:11 am   Subject: [Xansys] Transient thermal Analysis
Deepak

I had a similar problem in doing couple field transients with induction heating; the temperature affected the resistivity which affected the skin depth which affected the power induced. It wa ...
  Topic: [Xansys] [APDL] R.I.P. DEBUG
mike.yaksh

Replies: 100
Views: 98071

PostForum: XANSYS   Posted: Fri Mar 27, 2015 6:21 am   Subject: [Xansys] [APDL] R.I.P. DEBUG
Peter
I think your post is suitable for framing.

Mike Yaksh, PhD, PE
Manager, Structural and Thermal Analyses
NAC International
Norcross, GA

-----Original Message-----
From: Xansys [mailto:xansys-b ...
  Topic: [Xansys] constrain equation
mike.yaksh

Replies: 2
Views: 2087

PostForum: XANSYS   Posted: Thu Mar 12, 2015 6:24 am   Subject: [Xansys] constrain equation
Mr. Xiao

I have used constraint equations (CE) for magnetic models and I get the continuity of A to where a Path display across the dissimilar mesh looked good. What I did was to have the active no ...
  Topic: [Xansys] Modal analysis questions
mike.yaksh

Replies: 4
Views: 4856

PostForum: XANSYS   Posted: Tue Mar 10, 2015 8:10 am   Subject: [Xansys] Modal analysis questions
Joe
I think he is referring to defining Master Degrees of Freedom (MDOF). With improvement of the solvers, increased cores, I have not used this in a long time, even on larger problems. MDOF are defi ...
  Topic: getting elemental stress from Mechanical using command objec
mike.yaksh

Replies: 17
Views: 16458

PostForum: XANSYS   Posted: Sat Feb 28, 2015 3:36 pm   Subject: [Xansys] getting elemental stress from Mechanical using comm
Anirudh

The *get for the element volume does not need a solution. This could be done before a solution is generated. The *get for the SEQV does. I would check your solution.

Mike Yaksh
NAC Interna ...
  Topic: EMAG; Transient Magentic Excitaion
mike.yaksh

Replies: 5
Views: 5926

PostForum: XANSYS   Posted: Fri Feb 06, 2015 9:44 am   Subject: [Xansys] EMAG; Transient Magentic Excitaion
Mark

When you want to apply the transient magnetic field, is this by applying a constraint to AZ? If so, what is the error/warning message when you do this by inputting the command? This is a 2D m ...
  Topic: [EMAG][STRUCT] Magneto-structural 2D transient analysis EM
mike.yaksh

Replies: 22
Views: 18111

PostForum: XANSYS   Posted: Tue Jan 06, 2015 10:01 am   Subject: [Xansys] [EMAG][STRUCT] Magneto-structural 2D transient anal
Davide

It depends the solution method. If you are using plane13 with displacements and AZ, then NLGEOM,on should take it into account. If you doing the cycle of EMAG, structural, EMAG..., then you c ...
  Topic: [EMAG][STRUCT] Magneto-structural 2D transient analysis EM
mike.yaksh

Replies: 22
Views: 18111

PostForum: XANSYS   Posted: Tue Jan 06, 2015 8:21 am   Subject: [Xansys] [EMAG][STRUCT] Magneto-structural 2D transient anal
Davide,
If you were to apply a film coefficient for the forced convection, then it would be applied to the model surface. There is no need to model the air outside the model for the thermal. Most heat ...
  Topic: [EMAG][STRUCT] Magneto-structural 2D transient analysis EM
mike.yaksh

Replies: 22
Views: 18111

PostForum: XANSYS   Posted: Mon Dec 08, 2014 11:36 am   Subject: [Xansys] [EMAG][STRUCT] Magneto-structural 2D transient anal
Davide

I use the load transfer approach. I have to keep all the file names separately to do the restarts with the different DOFs. I do not use the LSwrite, LSsolve commands. The Physics write comm ...
  Topic: [Xansys] [EMAG] Setting up the boundary conditions of an axi
mike.yaksh

Replies: 3
Views: 3374

PostForum: XANSYS   Posted: Fri Dec 05, 2014 8:28 am   Subject: [Xansys] [EMAG] Setting up the boundary conditions of an axi
Issam

I have not looked at the MVP for axisymmetric models in some time. To ensure that Az=0 at the model edge, I would set it to zero. In running axisymmetric models even with the 53, the flux lin ...
  Topic: [Xansys] [EMAG] Setting up the boundary conditions of an axi
mike.yaksh

Replies: 3
Views: 3374

PostForum: XANSYS   Posted: Wed Dec 03, 2014 1:17 pm   Subject: [Xansys] [EMAG] Setting up the boundary conditions of an axi
Issam
I have run both ways (AZ=0, or not), and have not seen any difference. It is easy to esel,all nsel,,ext, d,all,az (the advantage of this is that if the BC symbols shows up in the interior ...
  Topic: [Xansys] [EMAG] Setting up the boundary conditions of an axi
mike.yaksh

Replies: 3
Views: 3171

PostForum: XANSYS   Posted: Wed Dec 03, 2014 11:50 am   Subject: [Xansys] [EMAG] Setting up the boundary conditions of an axi
Issam

If a static problem is being solved, and the pipe has only free space permeability, there is no physical reason to model the pipe (since it cannot affect the field), except to see where the ou ...
  Topic: [Xansys] [EMAG] Setting up the boundary conditions of an axi
mike.yaksh

Replies: 3
Views: 3171

PostForum: XANSYS   Posted: Wed Dec 03, 2014 10:08 am   Subject: [Xansys] [EMAG] Setting up the boundary conditions of an axi
Issam
I am not sure about the magnetization direction (radial or axial), but in either case, the flux lines will close; it is a result of DIV(B) being zero.

For problems with iron, it is not alway ...
  Topic: [EMAG][STRUCT] Magneto-structural 2D transient analysis EM
mike.yaksh

Replies: 22
Views: 18111

PostForum: XANSYS   Posted: Tue Dec 02, 2014 2:21 pm   Subject: [Xansys] [EMAG][STRUCT] Magneto-structural 2D transient anal
Davide
For the forces, I used LDREAD,FORC,,,,,,RST (since you are performing a magnetic static or transient, KIMG=0)

On a motor thermal model, I specified a film coefficient for the outer surface ...
  Topic: [EMAG][STRUCT] Magneto-structural 2D transient analysis EM
mike.yaksh

Replies: 22
Views: 18111

PostForum: XANSYS   Posted: Tue Dec 02, 2014 11:51 am   Subject: [Xansys] [EMAG][STRUCT] Magneto-structural 2D transient anal
Davide
1) I typically put in low values for E which would not affect the response of the stator or rotor. The same procedure is followed for actuators, also.
2) You can use LDREAD to read in each load ...
  Topic: [Xansys] acceleration load
mike.yaksh

Replies: 11
Views: 9725

PostForum: XANSYS   Posted: Wed Nov 26, 2014 9:46 am   Subject: [Xansys] acceleration load
Nestor,
I would think the Lorentz force would vary over the member. But if you have a force for a part, why couldn't you apply a nodal load to the nodes of the part that corresponds to the total part ...
  Topic: [EMAG][STRUCT] Magneto-structural 2D transient analysis EM
mike.yaksh

Replies: 22
Views: 18111

PostForum: XANSYS   Posted: Wed Nov 12, 2014 7:37 am   Subject: [Xansys] [EMAG][STRUCT] Magneto-structural 2D transient anal
Davide
Usually when the UX and UY were connected by CEINTF, it worked. First I would list out the CEs and confirm that the CE indeed did get generated. The CE symbol shows up if any CE is generated. ...
  Topic: [Xansys] [EMAG] magnetic force with 4 and 8 nodes elements
mike.yaksh

Replies: 1
Views: 2801

PostForum: XANSYS   Posted: Fri Nov 07, 2014 10:33 am   Subject: [Xansys] [EMAG] magnetic force with 4 and 8 nodes elements
Gabriella

I think there are two questions.

The problem you are working on sounds similar to the problem I have worked on.

In doing problems with cancellation in 2D axisymmetric solenoid problems ...
  Topic: [EMAG][STRUCT] Magneto-structural 2D transient analysis EM
mike.yaksh

Replies: 22
Views: 18111

PostForum: XANSYS   Posted: Wed Nov 05, 2014 9:14 am   Subject: [Xansys] [EMAG][STRUCT] Magneto-structural 2D transient anal
Davide

If the properties are isotropic, only EX, NUXY is needed. The density is kg/m^3, I assume.

Usually I used the LDEAD, FORC instead. That seemed to work. You can turn on the forces to see t ...
  Topic: [EMAG][STRUCT] Magneto-structural 2D transient analysis EM
mike.yaksh

Replies: 22
Views: 18111

PostForum: XANSYS   Posted: Tue Nov 04, 2014 11:53 am   Subject: [Xansys] [EMAG][STRUCT] Magneto-structural 2D transient anal
Davide,

The main question is if you are looking to see the effect of strain on the magnetic field. If not, what I normally did was to use the forces from each magnetic solution and perform static or ...
  Topic: [EMAG][APDL] Voltage fed concentrated windings in PMSM motor
mike.yaksh

Replies: 3
Views: 3772

PostForum: XANSYS   Posted: Tue Oct 21, 2014 12:14 pm   Subject: [Xansys] [EMAG][APDL] Voltage fed concentrated windings in P
Davide

1) I always modeled one section of the slot for each coil cross section. For each coil cross section there was a separate set of real constants. The number of elements should have no effect. ...
  Topic: [EMAG][APDL] PLANE233 real constants in voltage fed winding
mike.yaksh

Replies: 13
Views: 9368

PostForum: XANSYS   Posted: Tue Sep 30, 2014 4:56 am   Subject: [Xansys] [EMAG][APDL] PLANE233 real constants in voltage fed
Davide

Whenever, I think I have seen all the possible types, I come across another. Just this last week, someone needed solutions for an PM axial motor with the coils on a circuit board with PWM.

M ...
  Topic: [EMAG][APDL] PLANE233 real constants in voltage fed winding
mike.yaksh

Replies: 13
Views: 9368

PostForum: XANSYS   Posted: Mon Sep 29, 2014 12:15 pm   Subject: [Xansys] [EMAG][APDL] PLANE233 real constants in voltage fed
Davide

With the end-bars, did you couple all the nodes on the rotor metal (aluminum?) to simulate the end-bars connecting the bars? With the 1/5 symmetry, what periodic constraint did you use on the ...
  Topic: [EMAG][APDL] PLANE233 real constants in voltage fed winding
mike.yaksh

Replies: 13
Views: 9368

PostForum: XANSYS   Posted: Sat Sep 27, 2014 10:15 am   Subject: [Xansys] [EMAG][APDL] PLANE233 real constants in voltage fed
Davide

In a magnetics only model, the entire slot was filled with copper except for the air between multiple coils. In some cases where the slots are huge and the coil cross section , it might a dif ...
  Topic: [EMAG][APDL] PLANE233 real constants in voltage fed winding
mike.yaksh

Replies: 13
Views: 9368

PostForum: XANSYS   Posted: Thu Sep 25, 2014 10:35 am   Subject: [Xansys] [EMAG][APDL] PLANE233 real constants in voltage fed
Davide

Are the conductors in each half for separate coils, like in a lot machines?

As you indicated you need a real set for each part, one for upper and one for lower. I am not sure how big the coi ...
  Topic: [EMAG][APDL] PLANE233 real constants in voltage fed winding
mike.yaksh

Replies: 13
Views: 9368

PostForum: XANSYS   Posted: Tue Sep 23, 2014 8:43 am   Subject: [Xansys] [EMAG][APDL] PLANE233 real constants in voltage fed
Davide

1) I have solved the coupled field problem with the thermal in motors and other magnetic applications. You cycle between the two. For most windings I would estimate the average winding temper ...
  Topic: [EMAG][APDL] PLANE233 real constants in voltage fed winding
mike.yaksh

Replies: 13
Views: 9368

PostForum: XANSYS   Posted: Fri Sep 19, 2014 7:15 am   Subject: [Xansys] [EMAG][APDL] PLANE233 real constants in voltage fed
Davide

By your input, the model is planar like it would be for stack type motors.
Your Units are in meters.

The SC is the area of the elements modeled for the coil, not the area from a drawing ...
  Topic: [Xansys] [EMAG] Difference between AZ only DOF (SOLID236, SO
mike.yaksh

Replies: 10
Views: 8588

PostForum: XANSYS   Posted: Mon Sep 08, 2014 5:35 am   Subject: [Xansys] [EMAG] Difference between AZ only DOF (SOLID236, SO
Issam

It would make sense that for a field with large gradients, the model with the first order elements would require more elements than for a model with second order elements. It would help to kno ...
  Topic: any second order elements to replace solid97
mike.yaksh

Replies: 4
Views: 3542

PostForum: XANSYS   Posted: Sun Sep 07, 2014 4:16 pm   Subject: [Xansys] any second order elements to replace solid97
Zheng
Can you send the link on the undocumented information of the vector potential option for the 236?
Thanks
Mike Yaksh
NAC International
Norcross GA

-----Original Message-----
From: Xansys Zheng

...
  Topic: [EMAG] Mismatching in torque calculation (TORQSUM)
mike.yaksh

Replies: 5
Views: 3804

PostForum: XANSYS   Posted: Sun Sep 07, 2014 3:52 pm   Subject: [Xansys] [EMAG] Mismatching in torque calculation (TORQSUM)
Davide
The knee of the curve needs to be smooth, so that the NB curve does not have oscillations in it.
Mike Yaksh
NAC International
Norcross GA


-----Original Message-----
From: Xansys [mailto:xans ...
  Topic: any second order elements to replace solid97
mike.yaksh

Replies: 4
Views: 3542

PostForum: XANSYS   Posted: Sun Sep 07, 2014 3:50 pm   Subject: [Xansys] any second order elements to replace solid97
Zheng

Thanks for the information on the 236. I will have to try it out in some eddy current problems. Can you send me the information?

Thanks
Mike


-----Original Message-----
From: Xansys [mailt ...
  Topic: [EMAG] Mismatching in torque calculation (TORQSUM)
mike.yaksh

Replies: 5
Views: 3804

PostForum: XANSYS   Posted: Fri Sep 05, 2014 12:10 pm   Subject: [Xansys] [EMAG] Mismatching in torque calculation (TORQSUM)
Davide

When I worked on a brushless PM heart pump, I refined the mesh to where reasonable agreement was obtained, and then for design purposes the lower value was used.

It is important that your BH ...
  Topic: [Xansys] [EMAG] Difference between AZ only DOF (SOLID236, SO
mike.yaksh

Replies: 10
Views: 8588

PostForum: XANSYS   Posted: Fri Sep 05, 2014 10:01 am   Subject: [Xansys] [EMAG] Difference between AZ only DOF (SOLID236, SO
Matt

I did not realize that Maxwell did not have an infinite boundary element. I have used the infinite boundary element for the 96 and it works well. In bus bar problems, iron is not usually modeled ...
  Topic: [EMAG] Mismatching in torque calculation (TORQSUM)
mike.yaksh

Replies: 5
Views: 3804

PostForum: XANSYS   Posted: Fri Sep 05, 2014 9:29 am   Subject: [Xansys] [EMAG] Mismatching in torque calculation (TORQSUM)
Davide,

Your description is detailed, and it seems that the couplings are in the right place and the element types are right. The ceintf does not merge nodes but generate CEs to analytically connect ...
  Topic: [Xansys] [EMAG] Difference between AZ only DOF (SOLID236, SO
mike.yaksh

Replies: 10
Views: 8588

PostForum: XANSYS   Posted: Wed Sep 03, 2014 10:08 am   Subject: [Xansys] [EMAG] Difference between AZ only DOF (SOLID236, SO
Issam

You could use the 96 or the 236. Since the magnets are on the outside, and that they are probably rare earth, the Hc are large, which means the field may extend some distance away from the pip ...
  Topic: [Xansys] [EMAG] Difference between AZ only DOF (SOLID236, SO
mike.yaksh

Replies: 10
Views: 8588

PostForum: XANSYS   Posted: Tue Sep 02, 2014 8:58 am   Subject: [Xansys] [EMAG] Difference between AZ only DOF (SOLID236, SO
Issam,

As Matt described, the formulations are extremely different and have associated limitations. I am assuming that you are modeling in 3D since there is some aspect of the boundary conditions th ...
  Topic: Second derivative of temperature over time
mike.yaksh

Replies: 7
Views: 5701

PostForum: XANSYS   Posted: Mon Aug 04, 2014 5:50 am   Subject: [Xansys] Second derivative of temperature over time
David

Yes. Some APDL would obtain the results you need using *VGET, *VMASK, *VOPER. You would set up a loop using *do, *enddo to load (*VGET) the data for all the active nodes into some TABLE s, and ...
  Topic: [EMAG] SOLID236
mike.yaksh

Replies: 2
Views: 2198

PostForum: XANSYS   Posted: Fri Aug 01, 2014 6:31 am   Subject: [Xansys] [EMAG] SOLID236
Gabriella

With the 236, when I use the VROT, the inner radius is not zero. An additional volume by extrusion is generated to fill the center section so that the collapse of one side of the element is ...
  Topic: Second derivative of temperature over time
mike.yaksh

Replies: 7
Views: 5701

PostForum: XANSYS   Posted: Fri Aug 01, 2014 6:12 am   Subject: [Xansys] Second derivative of temperature over time
David
As pointed out, you can use /post26 for a node by node calculation. Is this what you want, or do you want to contour the derivative at each node at a particular time?
Mike Yaksh
NAC Internation ...
  Topic: [WB] Temperature difference between points
mike.yaksh

Replies: 3
Views: 3496

PostForum: XANSYS   Posted: Wed Jul 30, 2014 11:55 am   Subject: [Xansys] [WB] Temperature difference between points
Aaron
Could you use some APDL? A *DO with some *get's would do it.
Mike Yaksh
NAC International
Norcross GA

-----Original Message-----
From: Xansys [mailto:xansys-bounces@xansys.org] On Behalf Of aar ...
  Topic: [Xansys] [APDL] a way to obtain TREF from the rst file
mike.yaksh

Replies: 6
Views: 5632

PostForum: XANSYS   Posted: Fri Jul 25, 2014 7:51 am   Subject: [Xansys] [APDL] a way to obtain TREF from the rst file
I am using 14.5.

I entered:

/prep7
tref,125
*get,trf,common,,bfcom,,real,8

And the following was obtained,


EXIT THE ANSYS POST1 DATABASE PROCESSOR


***** ROUTINE COMPLETED ***** CP = 4. ...
  Topic: [EMAG] Gauge command aborted with imported model
mike.yaksh

Replies: 6
Views: 6939

PostForum: XANSYS   Posted: Thu Jul 24, 2014 7:40 am   Subject: [Xansys] [EMAG] Gauge command aborted with imported model
Gabriella
We have had more success with importing by going through WorkBench, and then bring the meshed model into MAPDL.
Mike Yaksh
NAC International
Norcross GA

-----Original Message-----
...
  Topic: [EMAG] Gauge command aborted with imported model
mike.yaksh

Replies: 6
Views: 6939

PostForum: XANSYS   Posted: Wed Jul 23, 2014 9:43 am   Subject: [Xansys] [EMAG] Gauge command aborted with imported model
Gabriella

I am assuming that you are doing a static analysis. It would seem that the model is not connected. One way to check this is to select the exterior nodes, all elements are active (NSEL,,EX ...
  Topic: Transient thermal analysis of SAW
mike.yaksh

Replies: 4
Views: 6100

PostForum: XANSYS   Posted: Fri Jun 20, 2014 11:30 am   Subject: [Xansys] Transient thermal analysis of SAW
Arpan

I use the active nodes to define the surface. There are a number of ways. You could get all the nodes on the surface and then select the elements for that load step and use sf,all,hflux,value. ...
  Topic: Transient thermal analysis of SAW
mike.yaksh

Replies: 4
Views: 6100

PostForum: XANSYS   Posted: Fri Jun 20, 2014 7:08 am   Subject: [Xansys] Transient thermal analysis of SAW
Arpan

I have moved heat fluxes before using the coordinate system, but it was in conjunction with a table. The last parameter in the *DIM connects the table to the coordinate system 11

*dim,hfx,tab ...
  Topic: [LS-DYNA] ERROR: Node velocity out of range
mike.yaksh

Replies: 3
Views: 4017

PostForum: XANSYS   Posted: Tue Jun 17, 2014 9:01 am   Subject: [Xansys] [LS-DYNA] ERROR: Node velocity out of range
Zheng

I would use a simpler material model, piece wise linear.

Would not alter the time step.

Check the ELFORM and make you are using what you think you are using. You would want to use fully integ ...
  Topic: [APDL] [Dyna] How to export Ansys Load results into Dyna?
mike.yaksh

Replies: 1
Views: 1858

PostForum: XANSYS   Posted: Mon Jun 16, 2014 6:18 am   Subject: [Xansys] [APDL] [Dyna] How to export Ansys Load results into
Zheng
Each node will have its own force time history from ANSYS. I would think that you would need to get the forces for each node separately and put those node in an array, and write that array out i ...
  Topic: [Xansys] On magnetic load transfer and coupled field analysi
mike.yaksh

Replies: 4
Views: 2847

PostForum: XANSYS   Posted: Mon Jun 09, 2014 9:08 am   Subject: [Xansys] On magnetic load transfer and coupled field analysi
Zheng

That is true about the 97 and iron; it does not work; the field is wrong. I have found the that induced currents seem to be better predicted by the 237, especially if you have to have tets. Do ...
  Topic: [Xansys] On magnetic load transfer and coupled field analysi
mike.yaksh

Replies: 4
Views: 2847

PostForum: XANSYS   Posted: Sun Jun 08, 2014 5:40 pm   Subject: [Xansys] On magnetic load transfer and coupled field analysi
Zheng

Have you tried the 237 as compared to the 117 and 97. I have used all three, and tend to use the 237.

Some time difference between the two forces meant that the mode is too coarse. I have se ...
  Topic: rezoning doubt
mike.yaksh

Replies: 5
Views: 2419

PostForum: XANSYS   Posted: Sun Jun 08, 2014 5:20 pm   Subject: [Xansys] rezoning doubt
Mr. Bhattacharya

I have solved this type of problem using an AC current and transients. For example, the AC solution was obtained and the heat generations and JxB forcres were generated. The magnetic ...
  Topic: Defining a pile in elastic media
mike.yaksh

Replies: 6
Views: 6086

PostForum: XANSYS   Posted: Sat May 24, 2014 8:17 pm   Subject: [Xansys] Defining a pile in elastic media
Mehmet

For some elements which have been superseded, the R command for the real data has been replaced by SECDATA commands.

Mike Yaksh
NAC International
Norcross GA, USA

-----Original Message--- ...
  Topic: [Xansys] Does number of substeps affect a non-linear analysi
mike.yaksh

Replies: 3
Views: 3238

PostForum: XANSYS   Posted: Sat May 24, 2014 8:17 pm   Subject: [Xansys] Does number of substeps affect a non-linear analysi
Aakash

Does this mean that you vary the heat load depending on the shear stress?

How are you moving the heat load?

If the temperature is too high, you need to check the boundary conditions. At thi ...
  Topic: Defining a pile in elastic media
mike.yaksh

Replies: 6
Views: 6086

PostForum: XANSYS   Posted: Fri May 23, 2014 8:17 am   Subject: [Xansys] Defining a pile in elastic media
Mehmet

Chuck is correct; if you can define it, APDL can probably handle it. If you can put it into an array (Table), then the pressure with the variation can be applied to the surface. For example i ...
  Topic: obtain averaged nodal stress results
mike.yaksh

Replies: 3
Views: 3612

PostForum: XANSYS   Posted: Tue May 20, 2014 8:15 am   Subject: [Xansys] obtain averaged nodal stress results
Hugo

Prns,s prints out the averaged value for the active nodes and elements.

You could use a *get,param_name,node,nodenumber,s,z

To return the averaged value for the elements attached to the node ...
  Topic: [XANSYS] [Emag] Plotting magnetic flux density
mike.yaksh

Replies: 2
Views: 2490

PostForum: XANSYS   Posted: Fri Nov 22, 2013 8:16 am   Subject: [Xansys] [XANSYS] [Emag] Plotting magnetic flux density
Nevena

BSUM is the magnitude and will always be positive. If you would to plot B(radial) (or B,X when RSYS,1 is used) then it would change sign.

Mike Yaksh
NAC International
Norcross GA



-----Or ...
  Topic: Film coefficient as a function of temperature
mike.yaksh

Replies: 3
Views: 2943

PostForum: XANSYS   Posted: Wed Oct 09, 2013 5:57 am   Subject: [Xansys] Film coefficient as a function of temperature
Atanu

Usually the film coefficient is dependent on the difference of the surface temperature and the ambient. You need to input the an HF material temperature property using MPTEMP and MPDATA,HF,mat ...
  Topic: Definition of Rigid Structure for seismic analysis
mike.yaksh

Replies: 3
Views: 4005

PostForum: XANSYS   Posted: Wed Sep 25, 2013 2:44 pm   Subject: [Xansys] Definition of Rigid Structure for seismic analysis
Vicky

If you have to compute the stresses in the brace, then it should not be ignored. The mass participation is small probably it has does not have the mass as compared to the rest of the structure ...
  Topic: [EMAG] Induction heater - Eddy Currents 2D
mike.yaksh

Replies: 2
Views: 3554

PostForum: XANSYS   Posted: Mon Aug 05, 2013 10:43 am   Subject: [Xansys] [EMAG] Induction heater - Eddy Currents 2D
Pedro

I am not familiar with your model geometry, but based on the elements, you are treating the coil as a stranded coil since you are not inputting the RSVX for the coil (and there is no VOLT dof), ...
  Topic: [Xansys] [EMAG] advice on suitability of ANSYS for Power Ele
mike.yaksh

Replies: 0
Views: 1367

PostForum: XANSYS   Posted: Mon Jul 29, 2013 1:38 pm   Subject: [Xansys] [EMAG] advice on suitability of ANSYS for Power Ele
Agree on Simplorer/Maxwell being the best. At one of the previous ANSYS conferences, I presented a paper on a 3 phase generator (and motion) complete with diodes and ran several types of simulations. ...
  Topic: Surface Operations - Array to Results
mike.yaksh

Replies: 3
Views: 2582

PostForum: XANSYS   Posted: Mon Jun 10, 2013 1:22 pm   Subject: [Xansys] Surface Operations - Array to Results
Luis

If I am not mistaken, the SUGET will extract data on a plane which may not coincide with any element boundaries. So for the reverse, you would need to put data into an element table. This works ...
  Topic: Force on iron in magneto-structural analysis
mike.yaksh

Replies: 16
Views: 11430

PostForum: XANSYS   Posted: Mon May 20, 2013 1:14 pm   Subject: [Xansys] Force on iron in magneto-structural analysis
Sundeep

I will look for a previous model and send it to you.
Mike Yaksh
NAC International
Norcross GA

-----Original Message-----
From: xansys-bounces@xansys.org [mailto:xansys-bounces@xansys.org] O ...
  Topic: Force on iron in magneto-structural analysis
mike.yaksh

Replies: 16
Views: 11430

PostForum: XANSYS   Posted: Fri May 17, 2013 1:58 pm   Subject: [Xansys] Force on iron in magneto-structural analysis
Sundeep

Your model has both iron and a coil, which means that you need to use the DSP scalar solution. If you do not use the DSP, you will end up with some problems at the iron-air interface.

The M ...
  Topic: Force on iron in magneto-structural analysis
mike.yaksh

Replies: 16
Views: 11430

PostForum: XANSYS   Posted: Fri May 17, 2013 1:27 pm   Subject: [Xansys] Force on iron in magneto-structural analysis
Sundeep,

You can find the stress if you convert the magnetics model to a structural model (96 to 45) and use LDREAD. The reason for the 98 is to allow you to use updated forces to calculate the defo ...
  Topic: Force on iron in magneto-structural analysis
mike.yaksh

Replies: 16
Views: 11430

PostForum: XANSYS   Posted: Fri May 17, 2013 1:27 pm   Subject: [Xansys] Force on iron in magneto-structural analysis
Sundeep,

You can find the stress if you convert the magnetics model to a structural model (96 to 45) and use LDREAD. The reason for the 98 is to allow you to use updated forces to calculate the defo ...
  Topic: Force on iron in magneto-structural analysis
mike.yaksh

Replies: 16
Views: 11430

PostForum: XANSYS   Posted: Fri May 17, 2013 1:27 pm   Subject: [Xansys] Force on iron in magneto-structural analysis
Sundeep,

You can find the stress if you convert the magnetics model to a structural model (96 to 45) and use LDREAD. The reason for the 98 is to allow you to use updated forces to calculate the defo ...
  Topic: Force on iron in magneto-structural analysis
mike.yaksh

Replies: 16
Views: 11430

PostForum: XANSYS   Posted: Fri May 17, 2013 1:27 pm   Subject: [Xansys] Force on iron in magneto-structural analysis
Sundeep,

You can find the stress if you convert the magnetics model to a structural model (96 to 45) and use LDREAD. The reason for the 98 is to allow you to use updated forces to calculate the defo ...
  Topic: Force on iron in magneto-structural analysis
mike.yaksh

Replies: 16
Views: 11430

PostForum: XANSYS   Posted: Fri May 17, 2013 1:27 pm   Subject: [Xansys] Force on iron in magneto-structural analysis
Sundeep,

You can find the stress if you convert the magnetics model to a structural model (96 to 45) and use LDREAD. The reason for the 98 is to allow you to use updated forces to calculate the defo ...
  Topic: Force on iron in magneto-structural analysis
mike.yaksh

Replies: 16
Views: 11430

PostForum: XANSYS   Posted: Fri May 17, 2013 11:57 am   Subject: [Xansys] Force on iron in magneto-structural analysis
Sundeep,

You can find the stress if you convert the magnetics model to a structural model (96 to 45) and use LDREAD. The reason for the 98 is to allow you to use updated forces to calculate the defo ...
  Topic: Force on iron in magneto-structural analysis
mike.yaksh

Replies: 16
Views: 11430

PostForum: XANSYS   Posted: Fri May 17, 2013 10:24 am   Subject: [Xansys] Force on iron in magneto-structural analysis
Sundeep

When you looked at the magnetics results, did you use an RMG file or an RST file? With the 96 and 36 and only the MAG dof for the 98 it might have put the results into an RMG file. So the L ...
  Topic: [Xansys] inconsistent temperature results during a melting s
mike.yaksh

Replies: 4
Views: 4507

PostForum: XANSYS   Posted: Tue Apr 16, 2013 12:58 pm   Subject: [Xansys] inconsistent temperature results during a melting s
Florian

I would check the enthalpy (Mpdata,ENTH,materialnumber,...) to make sure you simulate the latent heat correctly.

Mike Yaksh
NAC International
Norcross GA

-----Original Message-----
From: xa ...
  Topic: Coupling Joulheat and latent heat with Transient Thermal
mike.yaksh

Replies: 1
Views: 1919

PostForum: XANSYS   Posted: Sun Mar 10, 2013 8:27 pm   Subject: [Xansys] Coupling Joulheat and latent heat with Transient Th
Haitham

What software are you using to get the heat generation?

On the thermal side, you can maybe use the Enthalpy property for the phase change. If you losing any significant mass, then you need ...
  Topic: 3D Joule Heating
mike.yaksh

Replies: 5
Views: 4569

PostForum: XANSYS   Posted: Thu Feb 28, 2013 1:55 pm   Subject: [Xansys] 3D Joule Heating
Rob,

From the web I see 173 W/m-K or 0.173 W/mm-K. For rsvx I see 52 nOhm-m or .52E-8 Ohm-m. I am not sure what properties you are using. If you need mm, that's OK; the model needs to be consisten ...
  Topic: 3D Joule Heating
mike.yaksh

Replies: 5
Views: 4569

PostForum: XANSYS   Posted: Thu Feb 28, 2013 8:26 am   Subject: [Xansys] 3D Joule Heating
Rob

For this element, if you want to apply a current to one end of the conductor, then you use F,nodenumber,AMPS,value to a single node, and all the nodes are in a single CP on that end. The nodes o ...
  Topic: Damping for Large Mass Hyperelastic Full Transient
mike.yaksh

Replies: 6
Views: 5649

PostForum: XANSYS   Posted: Mon Dec 31, 2012 3:20 pm   Subject: [Xansys] Damping for Large Mass Hyperelastic Full Transient
Liang

When you ran the tests, what were you trying to determine; Mooney-Rivlin type constants, or damping coefficients? I suspect the rubber mounts are simple in shape, and if so, why can't you vary ...
  Topic: Damping for Large Mass Hyperelastic Full Transient
mike.yaksh

Replies: 6
Views: 5649

PostForum: XANSYS   Posted: Sun Dec 30, 2012 6:36 pm   Subject: [Xansys] Damping for Large Mass Hyperelastic Full Transient
Liang

We have performed analyses in such a manner by integrating to get the displacements. Typically the initial velocity is zero. One of the nice features about implicit work is that it easy to get ...
  Topic: Damping for Large Mass Hyperelastic Full Transient
mike.yaksh

Replies: 6
Views: 5649

PostForum: XANSYS   Posted: Thu Dec 27, 2012 12:54 pm   Subject: [Xansys] Damping for Large Mass Hyperelastic Full Transient
Liang

You have a most interesting problem. It has quite a number of nonlinearities, including viscoelastic properties and the damping is probably temperature dependent, strain dependent, strain rate ...
  Topic: [*Vget command APDL]
mike.yaksh

Replies: 5
Views: 6995

PostForum: XANSYS   Posted: Wed Nov 14, 2012 11:24 am   Subject: [Xansys] [*Vget command APDL]
Giuseppe

I think Bryan is correct. There are some options with *VOPER to do addressing in array form, but by the time you work through it, it might be easier to write the APDL below.

/out,w_kn,out
...
  Topic: coupling ANSYS Modal and Thermal
mike.yaksh

Replies: 3
Views: 4805

PostForum: XANSYS   Posted: Tue Nov 06, 2012 7:15 am   Subject: [Xansys] coupling ANSYS Modal and Thermal
Haitham,

If you have gotten the answers you were looking for each of the solutions, you could make the thermal model active and use LDREAD to apply the heat generations to the elements. Unless ther ...
  Topic: Command for deleting parameters
mike.yaksh

Replies: 5
Views: 11249

PostForum: XANSYS   Posted: Sun Nov 04, 2012 5:06 pm   Subject: [Xansys] Command for deleting parameters
Alexandre

I have wanted to do the same, but most often, I would use /cle. The APDL below is an attempt to delete all parameters. In some ways, it acts strange, but in the end it clears most of them ...
  Topic: [EM+Thermal] solid236 and solid70 for mass transport of heat
mike.yaksh

Replies: 1
Views: 1443

PostForum: XANSYS   Posted: Wed Sep 12, 2012 9:18 am   Subject: [Xansys] [EM+Thermal] solid236 and solid70 for mass transpor
Yong

As the metal temperature increases, the permeability and RSVX properties will change. So as the temperatures are changing, heat being generated by the magnetic flux which is strongly based on th ...
  Topic: [Xansys] Helical threads
mike.yaksh

Replies: 4
Views: 4983

PostForum: XANSYS   Posted: Wed Aug 29, 2012 9:53 am   Subject: [Xansys] Helical threads
Dan

I found this old section of code (Rev 10 days) to generate a helix thread. It might offer some ideas. It does not generate bricks, but uses tetrahedral, if that is useful.


/out,helix,out
! g ...
  Topic: Modifying table array elements
mike.yaksh

Replies: 6
Views: 5103

PostForum: XANSYS   Posted: Fri Jul 13, 2012 12:29 pm   Subject: [Xansys] Modifying table array elements
Scott

The tables can sometimes be confusing and it is easy to insert the data into the wrong location. A 2D table is shown

/out,stab2d,out

!Depth (ft) Angle (deg.)=0,18,36,54
! ...
  Topic: [Xansys] Circuit coupling- EMF and current (Yaksh, Mike)
mike.yaksh

Replies: 0
Views: 1555

PostForum: XANSYS   Posted: Fri Jul 13, 2012 6:41 am   Subject: [Xansys] Circuit coupling- EMF and current (Yaksh, Mike)
Ganesh

Thanks for the correction the frequency(rad/sec) is needed for the derivative for the sine to get the EMF.
Mike Yaksh
NAC International
Norcross GA



-----Original Message-----
From: xansys- ...
  Topic: [Xansys] Circuit coupling- EMF and current
mike.yaksh

Replies: 3
Views: 3252

PostForum: XANSYS   Posted: Thu Jul 12, 2012 8:03 am   Subject: [Xansys] Circuit coupling- EMF and current
Kariappan

I think the EMF between a radius R1 and R2 for a coil of N turns

EMF=2*3.14*N*Kariappan

If you are using circuit coupling, then you have to have the extra degrees of freedom; CURR and EM ...
  Topic: [Xansys] Circuit coupling- EMF and current
mike.yaksh

Replies: 3
Views: 3252

PostForum: XANSYS   Posted: Wed Jul 11, 2012 5:34 am   Subject: [Xansys] Circuit coupling- EMF and current
Kariappan

If you are using circuit coupling, then you have to have the extra degrees of freedom; CURR and EMF.

In the Theory Reference in a section called "Voltage forced and Circuit-Coupled M ...
  Topic: [Xansys] [PHYS] [APDL] Remeshing magnetic elements in MFS
mike.yaksh

Replies: 3
Views: 4774

PostForum: XANSYS   Posted: Sun Jun 24, 2012 7:13 pm   Subject: [Xansys] [PHYS] [APDL] Remeshing magnetic elements in MFS
Ahmed

I would try to mesh quads on top and bottom of the beam since you can compress quads to almost nothing. This would mean that you have to make use of 4 sided areas to allow you to mesh rectangul ...
  Topic: [Xansys] [PHYS] [APDL] Remeshing magnetic elements in MFS
mike.yaksh

Replies: 3
Views: 4774

PostForum: XANSYS   Posted: Sat Jun 23, 2012 11:48 am   Subject: [Xansys] [PHYS] [APDL] Remeshing magnetic elements in MFS
Ahmed

For actuators with large strokes I have used a sliding interface (CE) to avoid element distortion. Usually for air and iron, even with eddy currents you can use the 13, and for the coil if it ...
  Topic: How to work with Physics environment !!!
mike.yaksh

Replies: 4
Views: 2479

PostForum: XANSYS   Posted: Sat Jun 16, 2012 11:33 pm   Subject: [Xansys] How to work with Physics environment !!!
Debabrata

When we analyze a transient thermal condition and there is not a significant feedback, we solve the thermal transient first. Now if thermal shock is not an issue, so that the inertial force ...
  Topic: How to work with Physics environment !!!
mike.yaksh

Replies: 4
Views: 2479

PostForum: XANSYS   Posted: Sat Jun 16, 2012 10:40 pm   Subject: [Xansys] How to work with Physics environment !!!
Debabrata
Have you looked at plane13 and keyopt(1)=4 for ux,uy,temp,az (set az=0 and assign dummy properties for murx, or a solid5)? You would only consider a tight coupling if there are air gaps in ...
  Topic: [Xansys] [EMAG]Magneto-mechanical, eddy current induced by m
mike.yaksh

Replies: 2
Views: 3462

PostForum: XANSYS   Posted: Mon Jun 04, 2012 5:43 am   Subject: [Xansys] [EMAG]Magneto-mechanical, eddy current induced by m
Weixin,

If you are using the 117, then you can use constraint equations. Do a help,ce while in ANSYS. I have used this for periodic condition. For best results it would be best to have a uniform m ...
  Topic: [Xansys] [EMAG]Magneto-mechanical, eddy current induced by m
mike.yaksh

Replies: 1
Views: 2157

PostForum: XANSYS   Posted: Fri Jun 01, 2012 1:32 pm   Subject: [Xansys] [EMAG]Magneto-mechanical, eddy current induced by m
Weixin,

Unless you have some compelling reason to use morph, why not use CPs? These are used in generator simulations where the rotor motion results in induced currents in the stationary stator wind ...
  Topic: [Xansys] thermal analysis using lower and higher order elem.
mike.yaksh

Replies: 5
Views: 4871

PostForum: XANSYS   Posted: Thu May 24, 2012 5:56 am   Subject: [Xansys] thermal analysis using lower and higher order elem.
Suhas
If my name was going down as certifying that the maximum temperatures are less than the allowable temperatures and the margins are close: Yes (I realize that there may be other uncertainties, bu ...
  Topic: [Xansys] thermal analysis using lower and higher order elem.
mike.yaksh

Replies: 5
Views: 4871

PostForum: XANSYS   Posted: Thu May 24, 2012 5:41 am   Subject: [Xansys] thermal analysis using lower and higher order elem.
Suhas

If I had the responsibility to produce a temperature field from which the maximum temperatures are critical to the integrity of the device (and you are close to the allowable temperatures), and ...
  Topic: [Xansys] thermal analysis using lower and higher order elem.
mike.yaksh

Replies: 5
Views: 4871

PostForum: XANSYS   Posted: Thu May 24, 2012 5:27 am   Subject: [Xansys] thermal analysis using lower and higher order elem.
Suhas

I think you need to describe your problem a little more. Solid70's have been used for heat generation regions which were defined using a table and have gotten good results. Soild70 have been ...
  Topic: [Xansys] Power transformer- Warning message
mike.yaksh

Replies: 6
Views: 4525

PostForum: XANSYS   Posted: Mon May 21, 2012 9:28 pm   Subject: [Xansys] Power transformer- Warning message
Kariappan

Interior gaps in the model due to mismatched nodes on the elements needs to be avoided. I have used aglue many times. Need to build the model in a gradual fashion at this point to see what ...
  Topic: [Xansys] Power transformer- Warning message
mike.yaksh

Replies: 6
Views: 4525

PostForum: XANSYS   Posted: Mon May 21, 2012 5:46 am   Subject: [Xansys] Power transformer- Warning message
Kariappan

The segment was pasted into the command line. Some of the type 3 elements do not share all the nodes along a common boundary Element 18 has a node 81 which is not shared with element 6. T ...
  Topic: [Xansys] Power transformer- Warning message
mike.yaksh

Replies: 6
Views: 4525

PostForum: XANSYS   Posted: Sat May 19, 2012 12:03 pm   Subject: [Xansys] Power transformer- Warning message
Kariappan

I am assuming that this is a 2d model.

If some part of the model is not connected, because the aglue was not used or the coincident nodes were not merged out , then it will appear as not h ...
  Topic: [Xansys] Glue error
mike.yaksh

Replies: 0
Views: 1177

PostForum: XANSYS   Posted: Fri May 11, 2012 7:14 am   Subject: [Xansys] Glue error
Kariappan

It might work, if the other areas do not have line segments that would cause a keypoint to be placed in the interior of the existing lines defined below. Sometimes with an existing mesh, i ...
  Topic: [XANSYS] [Emag] Residual magnetization
mike.yaksh

Replies: 2
Views: 3022

PostForum: XANSYS   Posted: Fri May 11, 2012 7:00 am   Subject: [Xansys] [XANSYS] [Emag] Residual magnetization
Ivan

I have a macro that I have used for regular ANSYS for detent. It makes each element in the iron a separate magnet. It has some merit, and some result which were obtained were reasonable. I am n ...
  Topic: [Xansys] Glue operation error
mike.yaksh

Replies: 2
Views: 2057

PostForum: XANSYS   Posted: Thu May 10, 2012 9:45 am   Subject: [Xansys] Glue operation error
Kariappan

Something like this:

fini
/cle
/prep7
et,1,13
rectan,0,1,0,.3
lsel,,length,,1
lesi,all,,,20
lsel,inve
lesi,all,,,7
ames,all
alls
nsll,,1
esln
emod,all,mat,2
alls
/pnum,mat,1 ...
  Topic: [Xansys] Glue operation error
mike.yaksh

Replies: 2
Views: 2057

PostForum: XANSYS   Posted: Thu May 10, 2012 5:57 am   Subject: [Xansys] Glue operation error
Kariappan

Is this 2D or 3D, and is it ANSYS or WorkBench?

If ANSYS, I would generate the model either by
1) forming the areas such that the aglue is not needed
2) using a macro to insert a la ...
  Topic: Seeking help regarding Butt welding simulation
mike.yaksh

Replies: 10
Views: 4262

PostForum: XANSYS   Posted: Wed Apr 11, 2012 2:31 pm   Subject: [Xansys] Seeking help regarding Butt welding simulation
Debabrata

When you step this size load up, you can expect some issues with the time steps. They will need to be small, and when they get too small you can have other problems with the solution. To co ...
  Topic: Seeking help regarding Butt welding simulation
mike.yaksh

Replies: 10
Views: 4262

PostForum: XANSYS   Posted: Wed Apr 11, 2012 1:08 pm   Subject: [Xansys] Seeking help regarding Butt welding simulation
Debabrata

The flux has some conductivity and some small thickness, so there will be heat rejected to its surface. Most likely the emissivity at the surface is near unity.

The radiation can be simu ...
  Topic: Seeking help regarding Butt welding simulation
mike.yaksh

Replies: 10
Views: 4262

PostForum: XANSYS   Posted: Wed Apr 11, 2012 11:43 am   Subject: [Xansys] Seeking help regarding Butt welding simulation
Debabrata

With temperatures this large you need to include radiation, which could be included in the film coefficient property (HF). When using radiation you need some justification for the emissiv ...
  Topic: [EMAG] dynamic rotor of PMSM in transient analysis
mike.yaksh

Replies: 2
Views: 2100

PostForum: XANSYS   Posted: Thu Mar 15, 2012 7:10 pm   Subject: [Xansys] [EMAG] dynamic rotor of PMSM in transient analysis
Grzegorz

I have solved SRM problems as transients, and generators. Can you be more specific about the use of currents or voltage to the stator, and what do you want to see happen to the rotor? How m ...
  Topic: [Xansys] [EMAG] dynamic rotor of PMSM in transient analysis
mike.yaksh

Replies: 6
Views: 6152

PostForum: XANSYS   Posted: Wed Mar 14, 2012 10:06 am   Subject: [Xansys] [EMAG] dynamic rotor of PMSM in transient analysis
Grzegorz,

If you are going to feed the stator with currents without any 124's, you can use the 13 for the entire model; As you indicated, a simple approach would be to move the mesh at some angular ...
  Topic: Transient current density loading in 3D
mike.yaksh

Replies: 12
Views: 8327

PostForum: XANSYS   Posted: Tue Nov 29, 2011 7:53 am   Subject: [Xansys] Transient current density loading in 3D
Deepu,

The *do loop is needed since the BFE command does not accept the use of tabular input (%curd%) as you have shown below. Therefore, to vary the current with respect to time, you need to explici ...
  Topic: Transient current density loading in 3D
mike.yaksh

Replies: 12
Views: 8327

PostForum: XANSYS   Posted: Thu Nov 24, 2011 10:43 pm   Subject: [Xansys] Transient current density loading in 3D
Deepu

I have the used the table option before in the transient evaluations, but it was always with the F,nodenumber,amps,%tablename%, since usually with transients, I had a skin effect that was being ...
  Topic: Transient current density loading in 3D
mike.yaksh

Replies: 12
Views: 8327

PostForum: XANSYS   Posted: Wed Nov 16, 2011 12:25 pm   Subject: [Xansys] Transient current density loading in 3D
Deepu,

If you are applying a current then solving, then be sure to use KBC,0 (should be the default) to allow the current to be ramped from load step to load step. I am assuming that you are startin ...
  Topic: Transient current density loading in 3D
mike.yaksh

Replies: 12
Views: 8327

PostForum: XANSYS   Posted: Fri Nov 11, 2011 2:11 pm   Subject: [Xansys] Transient current density loading in 3D
Deepu,

Typically in a transient analysis, there could be a skin effect on the copper conductor. If the current varies faster than a 50Hz signal and the copper conductor is thicker than 9 mm, then yo ...
  Topic: Transient current density loading in 3D
mike.yaksh

Replies: 12
Views: 8327

PostForum: XANSYS   Posted: Wed Nov 09, 2011 12:45 am   Subject: [Xansys] Transient current density loading in 3D
Deepu

The current density applied with the BFE command uses the element coordinate axes. So for a circular coil it would use a cylindrical coordinate system. If you have a race track coil; ,for the ...
  Topic: voltage provided by an electrode on a piezo beam
mike.yaksh

Replies: 3
Views: 2076

PostForum: XANSYS   Posted: Tue Oct 25, 2011 9:02 am   Subject: [Xansys] voltage provided by an electrode on a piezo beam
Jerome,

One approach would be to model a large resistance across the two points for the voltage measurement so as to minimize any current in that element. If the adjacent resistances are on the orde ...
  Topic: voltage provided by an electrode on a piezo beam
mike.yaksh

Replies: 3
Views: 2076

PostForum: XANSYS   Posted: Fri Oct 21, 2011 12:46 pm   Subject: [Xansys] voltage provided by an electrode on a piezo beam
Jerome

ANSYS has examples, I believe, of the piezoelectric option in the help manual. Verification vm175 is an example of this option. The VM175 problem uses the solid5 with the VOLT dof active. In ...
  Topic: [Xansys] Need help in plotting tangential component of elect
mike.yaksh

Replies: 1
Views: 1689

PostForum: XANSYS   Posted: Wed Oct 12, 2011 6:20 am   Subject: [Xansys] Need help in plotting tangential component of elect
Rosy,

If a coordinate axis is parallel to the surface, you can use RSYS to plot the components based on axis defined by the coordinate system used in the RSYS command. If the Y axis of say coordinat ...
  Topic: Restarting of Electromagnetic analysis?
mike.yaksh

Replies: 4
Views: 4369

PostForum: XANSYS   Posted: Tue Sep 13, 2011 9:17 am   Subject: [Xansys] Restarting of Electromagnetic analysis?
Sebastian

I do the following
/dele,%_acname%,rst
/dele,%_acname%,full
/dele,%_acname%,esav
/dele,%_acname%,osav
/dele,%_acname%,emat
/dele,%_thname%,rth
/dele,%_thname%,full
/dele,%_thname%,esav
/del ...
  Topic: Restarting of Electromagnetic analysis?
mike.yaksh

Replies: 4
Views: 4369

PostForum: XANSYS   Posted: Mon Sep 12, 2011 12:50 pm   Subject: [Xansys] Restarting of Electromagnetic analysis?
Sebastian

The first time you solve the magnetics problem is with ANTYPE,NEW. Then when you want to restart it, use ANTYPE,REST.


From what you describe, you intend to solve the magnetics model, then ...
  Topic: Structural-magnetic coupled contact
mike.yaksh

Replies: 4
Views: 3864

PostForum: XANSYS   Posted: Wed Aug 31, 2011 1:08 pm   Subject: [Xansys] Structural-magnetic coupled contact
Yunxin,

The contact elements only support the MAG dof for the scalar formulation. If the 62 is to be used, then constraint equations are needed to allow the AX,AY,AZ to be connected across the interf ...
  Topic: Structural-magnetic coupled contact
mike.yaksh

Replies: 4
Views: 3864

PostForum: XANSYS   Posted: Fri Aug 26, 2011 8:29 am   Subject: [Xansys] Structural-magnetic coupled contact
Yunxin

I use constraint equations for cases like when I want to offset the rotor from the centerline in the radial direction. In that case, I solve the structural problem in which the air has a low ...
  Topic: [Xansys] [XANSYS] Accessing TABLE data
mike.yaksh

Replies: 0
Views: 1025

PostForum: XANSYS   Posted: Tue Jul 05, 2011 8:56 am   Subject: [Xansys] [XANSYS] Accessing TABLE data
Hi Rolf,

I think I would define an array *dim,aa,,nmax and copy the index into that array *vfun,aa(1),copy,yourtable(1,0)

Mike Yaksh
NAC International
Norcross GA

-----Original Message-----
From: x ...
  Topic: [Xansys] [EMAG] ERES command in circuit coupled analysis
mike.yaksh

Replies: 2
Views: 2950

PostForum: XANSYS   Posted: Wed Jun 01, 2011 11:19 pm   Subject: [Xansys] [EMAG] ERES command in circuit coupled analysis
Jinoy,

The 97 does not hAndle iron accurately without additional coupling at the iron air interface. If the model does not have iron, thAt is not an issue.

When you ssum the eres it should be equal ...
  Topic: [Xansys] [EMAG] ERES command in circuit coupled analysis
mike.yaksh

Replies: 2
Views: 2950

PostForum: XANSYS   Posted: Sat May 28, 2011 6:28 am   Subject: [Xansys] [EMAG] ERES command in circuit coupled analysis
Hi Jose

If the element sizes are all the same, then the ERES for each element would be the same also. The ERES element data is intended to be used as a sum from the SSUM and then *get,coilresistance ...
  Topic: Magnet Rotation
mike.yaksh

Replies: 16
Views: 14078

PostForum: XANSYS   Posted: Thu Apr 21, 2011 7:10 am   Subject: [Xansys] Magnet Rotation
Leong

When you mesh the volumes, the elements will have the ESYS you have defined. If you use /PSYM,ESYS,1 you will see the triads appear in each element (white=x, green=Y, blue=Z), and the Z shoul ...
  Topic: Magnet Rotation
mike.yaksh

Replies: 16
Views: 14078

PostForum: XANSYS   Posted: Tue Apr 19, 2011 2:34 pm   Subject: [Xansys] Magnet Rotation
Leong,

Before you use EMFT, I believe you need to select the exterior nodes of each magnet, one at a time (not together)

esel,,mat,,magnetmaterialnumber
Nsel,,ext

then use EMFT

The di ...
  Topic: Magnet Rotation
mike.yaksh

Replies: 16
Views: 14078

PostForum: XANSYS   Posted: Tue Apr 19, 2011 7:26 am   Subject: [Xansys] Magnet Rotation
Leong

You want to define the local axis to correspond to the orientation of the
magnet for which you need the solution.

I think that you are doing with a 3D model, and you had a question befor ...
  Topic: Magnet Rotation
mike.yaksh

Replies: 16
Views: 14078

PostForum: XANSYS   Posted: Mon Apr 18, 2011 6:26 am   Subject: [Xansys] Magnet Rotation
Leong

The MGXX,MGYY,MGZZ are defined with respect to the element coordinate axis. The ESYS attribute for the element is a coordinate system number that has been defined by LOCAL (and other commands ...
  Topic: Magnet Rotation
mike.yaksh

Replies: 16
Views: 14078

PostForum: XANSYS   Posted: Fri Apr 15, 2011 5:11 am   Subject: [Xansys] Magnet Rotation
Hi Leong

I think you are supposed to select the outer nodes of the object before the EMFT. You might want to use a relative Mu for the magnet of about 1.1 if Br is about 1.35.

Mike Yaksh
NAC I ...
  Topic: Magnet Rotation
mike.yaksh

Replies: 16
Views: 14078

PostForum: XANSYS   Posted: Fri Apr 15, 2011 5:11 am   Subject: [Xansys] Magnet Rotation
Hi Leong

I think you are supposed to select the outer nodes of the object before the EMFT. You might want to use a relative Mu for the magnet of about 1.1 if Br is about 1.35.

Mike Yaksh
NAC I ...
  Topic: Magnet Rotation
mike.yaksh

Replies: 16
Views: 14078

PostForum: XANSYS   Posted: Fri Apr 15, 2011 5:11 am   Subject: [Xansys] Magnet Rotation
Hi Leong

I think you are supposed to select the outer nodes of the object before the EMFT. You might want to use a relative Mu for the magnet of about 1.1 if Br is about 1.35.

Mike Yaksh
NAC I ...
  Topic: [Workbench-Emag] Ansys Workbench v 11.0 and winding tool
mike.yaksh

Replies: 6
Views: 6177

PostForum: XANSYS   Posted: Mon Feb 28, 2011 11:04 am   Subject: [Xansys] [Workbench-Emag] Ansys Workbench v 11.0 and winding
Alexander

I think you are modeling the coil using the coil primitive based on the sourc36 element which requires the Amp-turns for input, not just the amperage. This primitive does a Biot-Savart ca ...
  Topic: [Workbench-Emag] Ansys Workbench v 11.0 and winding tool
mike.yaksh

Replies: 6
Views: 6177

PostForum: XANSYS   Posted: Mon Feb 28, 2011 11:04 am   Subject: [Xansys] [Workbench-Emag] Ansys Workbench v 11.0 and winding
Alexander

I think you are modeling the coil using the coil primitive based on the sourc36 element which requires the Amp-turns for input, not just the amperage. This primitive does a Biot-Savart ca ...
  Topic: [Xansys] Thermal internal Heat generation enquiry
mike.yaksh

Replies: 1
Views: 2249

PostForum: XANSYS   Posted: Thu Dec 31, 2009 11:00 am   Subject: [Xansys] Thermal internal Heat generation enquiry
Mark,
This brings up a good point. This also implies that one needs to check the heat load using FSUM. Even with a transient, I run a static first to check the fsum.
Thanks
Mike Yaksh
NAC Internat ...
  Topic: [Xansys] Thermal internal Heat generation enquiry
mike.yaksh

Replies: 1
Views: 2249

PostForum: XANSYS   Posted: Thu Dec 31, 2009 9:46 am   Subject: [Xansys] Thermal internal Heat generation enquiry
Hi Zhang,
If you are solving a steady state problem, the density and C is not needed. The main issues are the way the coil is modeled. If this is a stranded coil, effective properties are sufficient. ...
  Topic: Static magnet 3D
mike.yaksh

Replies: 1
Views: 1573

PostForum: XANSYS   Posted: Mon Dec 14, 2009 6:27 am   Subject: [Xansys] Static magnet 3D
Hi Leo

I am not clear about certain aspects of the model, but it appears the 96 and 36 are applicable to the problem. It does not appear that you are using symmetry in your model, but if you do, the ...
  Topic: [Xansys] APLD: TREAD
mike.yaksh

Replies: 1
Views: 1984

PostForum: XANSYS   Posted: Thu Dec 03, 2009 6:35 am   Subject: [Xansys] APLD: TREAD
Hi Alvarado

The MPDATA will allow up to 100 values, and I had the same issue with MURX. It is a section of that file for MURX for material 5. The first set of commands defines the temperatures, and ...
  Topic: [Xansys] Electromagnetic force on a component
mike.yaksh

Replies: 0
Views: 1163

PostForum: XANSYS   Posted: Mon Nov 30, 2009 6:56 am   Subject: [Xansys] Electromagnetic force on a component
Hi Shohel

There are two ways to accomplish this.

1) You can select out the component C1,

CMSEL,,C1
NSLE
ESLN

and then do

SSUM

To place the force into an array, you can use

*GET,paramname,ss ...
  Topic: [EMAG]Circuit Analysis in EMAG
mike.yaksh

Replies: 2
Views: 4248

PostForum: XANSYS   Posted: Mon Nov 30, 2009 6:25 am   Subject: [EMAG]Circuit Analysis in EMAG
Hi Yong,

You need to use

ESOL,3,2,4,AMPS,,name

To get the current, say of the resistor.

Please include name, company, as shown below when sending in a post to XANSYS.

Mike Yaksh
NAC Internationa ...
  Topic: Transient thermal problem
mike.yaksh

Replies: 4
Views: 3037

PostForum: XANSYS   Posted: Mon Nov 30, 2009 5:34 am   Subject: [Xansys] Transient thermal problem
Hi Li,

When the 50Hz or 60Hz machine is energized, the current will reach the maximum for the cycle in a quarter period or about 5 ms. For this reason the RMS heat generation (BFE,element,HGEN,1,valu ...
  Topic: EMAG Harmonic analysis-Induction Heating
mike.yaksh

Replies: 3
Views: 2633

PostForum: XANSYS   Posted: Sat Nov 28, 2009 9:56 am   Subject: EMAG Harmonic analysis-Induction Heating
Hi Sandeep

If you are applying a current density (BFE) this means that the conductors generating the field is a stranded conductor. In considering heat being generated, the only application I see thi ...
  Topic: EMAG Harmonic analysis-Induction Heating
mike.yaksh

Replies: 3
Views: 2633

PostForum: XANSYS   Posted: Tue Nov 24, 2009 8:55 am   Subject: EMAG Harmonic analysis-Induction Heating
Hi Sandeep

It is very important to account for saturation since it reduces the MU which increases the skin depth. Also, the field variation becomes less "sine" shape since the properties a ...
  Topic: Emag Thermal Multi Field Analysis
mike.yaksh

Replies: 0
Views: 1044

PostForum: XANSYS   Posted: Mon Nov 23, 2009 11:29 am   Subject: Emag Thermal Multi Field Analysis
Hi Sabarigiri

This is a common problem to be simulated. In section 2.8 of the Chapter 2 Sequentially Coupled Physics Analysis, an example is given with the input stream. Before the Physics command i ...
  Topic: [Xansys] [PHYS] Integration of Reaction Solution
mike.yaksh

Replies: 0
Views: 1009

PostForum: XANSYS   Posted: Wed Nov 18, 2009 1:52 pm   Subject: [Xansys] [PHYS] Integration of Reaction Solution
Hi Abhi,

Since this is the reaction at the nodes, you should be able to add them up using FSUM and *get. The FSUM works on the active node set.

Mike Yaksh
NAC International
Norcross GA

-----Origin ...
  Topic: [EMAG] 2D transient analysis - free discharge
mike.yaksh

Replies: 1
Views: 1528

PostForum: XANSYS   Posted: Mon Nov 16, 2009 2:05 pm   Subject: [EMAG] 2D transient analysis - free discharge
Hi Marco

I think the problem may be that at the end, you want to solve a problem in which you just want to see the EMF across the coil being generated due to the initial conditions of the field (whic ...
  Topic: [Emag] material property
mike.yaksh

Replies: 1
Views: 1423

PostForum: XANSYS   Posted: Thu Nov 05, 2009 7:47 am   Subject: [Emag] material property
Hi Indrajeet

Your original email indicated that the RSVX was to be dependent on AZ. If this is correct, then it is technically a nonlinear problem. So one approach is to allow the AZ to correspond to ...
  Topic: [Xansys] [Emag] material property
mike.yaksh

Replies: 2
Views: 2595

PostForum: XANSYS   Posted: Tue Nov 03, 2009 10:33 pm   Subject: [Xansys] [Emag] material property
<!-- Converted from text/plain format -->
Hi Indrajeet

This is a strange material¤

With some apdl you could set a do loop and redefine the temperatures for the nodes at the end of e ...
  Topic: [Xansys] [EMAG]SOLID226
mike.yaksh

Replies: 1
Views: 1739

PostForum: XANSYS   Posted: Wed Oct 07, 2009 5:00 am   Subject: [Xansys] [EMAG]SOLID226
Hi Martin

I did a transient using the 236 at 12 and used keyopt(2)=2 for the
conductors. Everywhere else used 0. The model applied the AZ=0 to all
the exterior nodes (where there not a CE for the p ...
  Topic: [Xansys] [APDL] Problems with current application
mike.yaksh

Replies: 8
Views: 5913

PostForum: XANSYS   Posted: Thu Oct 01, 2009 7:05 am   Subject: [Xansys] [APDL] Problems with current application
Hi Gabriella

The reason for the bad current was due to the VOLT condition at Z=1.
Some nodes at the inner row of nodes (z=.98549) were also selected. When
using the NSEL you need to specify the min a ...
  Topic: [Xansys] [APDL] Problems with current application
mike.yaksh

Replies: 8
Views: 5913

PostForum: XANSYS   Posted: Wed Sep 30, 2009 3:07 pm   Subject: [Xansys] [APDL] Problems with current application
Hi Gabriella


Here is an example of 226 with the surface integral. Note that SUCR uses
3 for nrefine. The post processor is missing 11A out of 1000A or 1%.
This could be an accuracy problem with the ...
  Topic: [Xansys] [APDL] Problems with current application
mike.yaksh

Replies: 8
Views: 5913

PostForum: XANSYS   Posted: Tue Sep 29, 2009 7:55 am   Subject: [Xansys] [APDL] Problems with current application
Hi Gabriella

The area operations uses the active elements. If the plane passes
through other parts of the conductor it might be including it also, just
a guess.

Are you using the maximum refinement ...
  Topic: [Xansys]Postprocessingcurrentandcurrentdensityinthermo-elect
mike.yaksh

Replies: 2
Views: 2426

PostForum: XANSYS   Posted: Thu Sep 24, 2009 4:26 am   Subject: [Xansys]Postprocessingcurrentandcurrentdensityinthermo-elect
Hi Gabriella

If you have increased the refinement (in the area operation) as much as
possible, and you get the same answer, it could be due to mesh
refinement, else that the best answer you are going ...
  Topic: [Xansys] [EMAG] Torque using EMFT
mike.yaksh

Replies: 0
Views: 1070

PostForum: XANSYS   Posted: Tue Sep 22, 2009 11:16 am   Subject: [Xansys] [EMAG] Torque using EMFT
Hi Sabarigiri

The macro summary indicates that the torque components are about the
active coordinate (CSYS) axis as indicated in the documentation part of
the macro FMGN. So if the csys,0 was active, ...
  Topic: [Xansys] [emag] iron saturation
mike.yaksh

Replies: 5
Views: 3951

PostForum: XANSYS   Posted: Tue Sep 22, 2009 9:32 am   Subject: [Xansys] [emag] iron saturation
Hi Gabriella

I took a model which had a relative permeability of 41 and the linear
range had a value of 10,000 which indicates that the element with mur=41
is saturated. The B vector plot showed 2.1 ...
  Topic: [Xansys]Postprocessingcurrentandcurrentdensityinthermo-elect
mike.yaksh

Replies: 2
Views: 2426

PostForum: XANSYS   Posted: Tue Sep 22, 2009 8:49 am   Subject: [Xansys]Postprocessingcurrentandcurrentdensityinthermo-elect
Hi Gabriella

If you are using 69's, the problem is that it does not support PLNS of
the current density. It will support the ETAB of the current density,
but the SUMAP supports the use of the PLNS no ...
  Topic: Postprocessingcurrentandcurrentdensityinthermo-electric anal
mike.yaksh

Replies: 0
Views: 1053

PostForum: XANSYS   Posted: Mon Sep 21, 2009 9:31 am   Subject: Postprocessingcurrentandcurrentdensityinthermo-electric anal
Hi Gabriella

I would only separate the two if you need to know the current in each
one, else one would suffice. I believe this command works on the active
elements.

The component used in the SUMAP ...
  Topic: [Xansys] [emag] iron saturation
mike.yaksh

Replies: 5
Views: 3951

PostForum: XANSYS   Posted: Mon Sep 21, 2009 8:47 am   Subject: [Xansys] [emag] iron saturation
Hi Gabriella

I would adjust the curve to make this much closer to the 1.2566E-6
value. Depending on air gaps and what else is in the model, this could
overestimate the B significantly.

If you do no ...
  Topic: [Xansys] [emag] iron saturation
mike.yaksh

Replies: 5
Views: 3951

PostForum: XANSYS   Posted: Mon Sep 21, 2009 4:10 am   Subject: [Xansys] [emag] iron saturation
Hi Gabriella

Depending on the field applied, and with the current levels you are
dealing with, you could see much higher values. Plot the
HSUM(PLNS,H,SUM) and then take a point in the saturated regi ...
  Topic: [Xansys] [ EMAG ] Force calculation
mike.yaksh

Replies: 1
Views: 2048

PostForum: XANSYS   Posted: Fri Sep 18, 2009 4:35 am   Subject: [Xansys] [ EMAG ] Force calculation
Hi Vijay

One way would be to model a small gap (of air) between the two faces.
Unless the faces are "optically" so there is no gap, there is going to
be an air gap. In many designs there ma ...
  Topic: [Xansys] R: [other] Post processing currentandcurrentdensity
mike.yaksh

Replies: 0
Views: 962

PostForum: XANSYS   Posted: Thu Sep 17, 2009 3:08 pm   Subject: [Xansys] R: [other] Post processing currentandcurrentdensity
Hi Gabriella

If the conductor is extruded, then you could select a layer of elements
and compute the current using ETABLE data for volume (to compute an
area), JS components (and SMULT). If the elem ...
  Topic: [Xansys] [other] Post processing current and currentdensityi
mike.yaksh

Replies: 0
Views: 1027

PostForum: XANSYS   Posted: Thu Sep 17, 2009 8:48 am   Subject: [Xansys] [other] Post processing current and currentdensityi
Hi Gabriella

I apologize that I did not read the first email more carefully in that
you are using 67 (next time, I will get the coffee first, then read
XANSYS).

The plane67 will need the etable item ...
  Topic: [Xansys] [other] Post processing current and current density
mike.yaksh

Replies: 1
Views: 1504

PostForum: XANSYS   Posted: Thu Sep 17, 2009 4:09 am   Subject: [Xansys] [other] Post processing current and current density
Hi Gabriella

The legend is A/m^2 for current density. It is generated in the
solution. The theoretical manner describes differential equations and
the degrees of freedom (VOLT).

CURR2D will compute ...
  Topic: [APDL] Interpolate stress at a point that is not a node
mike.yaksh

Replies: 9
Views: 7797

PostForum: XANSYS   Posted: Thu Sep 10, 2009 11:55 am   Subject: [Xansys] [APDL] Interpolate stress at a point that is not a
Hi Christiane

You might try

N_case=4
*set,fname
*dim,fname,char,n_case ! names of the data bases with result sets
Fname(1)='name1','name2''name3','name4'

N_loc=5 ! example
*set,str_loc,,n_loc,3 ...
  Topic: [EMAG] Cyclic symmetry
mike.yaksh

Replies: 6
Views: 6878

PostForum: XANSYS   Posted: Wed Sep 09, 2009 10:56 am   Subject: [Xansys] [EMAG] Cyclic symmetry
Hi Nidhishri

The periodicity is for the 117. The 36 is a primitive to enable the
Biot-Savart calc. I think you have to model all the 36's which are in
the vicinity of the 117, just like in a motor m ...
  Topic: [EMAG] Cyclic symmetry
mike.yaksh

Replies: 6
Views: 6878

PostForum: XANSYS   Posted: Wed Sep 09, 2009 4:46 am   Subject: [Xansys] [EMAG] Cyclic symmetry
Hi Nidhishri

In EMAG, if you have a periodic model, it needs to be first determined
if it requires even periodicity or odd periodicity. In a permanent
magnet motor, if one pole is modeled, then only ...
  Topic: Emag:calculation at 21 kHz
mike.yaksh

Replies: 1
Views: 1253

PostForum: XANSYS   Posted: Mon Aug 31, 2009 4:59 am   Subject: Emag:calculation at 21 kHz
Hi Saravanan

This appears to be a 3D model (assuming that the coils are not on the
same axis which could use a 2D axisymmetric model), and the wire is
sufficiently small to neglect skin effects in th ...
  Topic: [Xansys] [emag] error
mike.yaksh

Replies: 1
Views: 1931

PostForum: XANSYS   Posted: Thu Aug 27, 2009 12:06 pm   Subject: [Xansys] [emag] error
Hi Varun

The resistivity error is due to the keyopt being turned on for the velocity effect.

The most likely reason for the warning is that the node with the AZ constraint was not active when the ...
  Topic: [Xansys] [emag] error
mike.yaksh

Replies: 1
Views: 1931

PostForum: XANSYS   Posted: Thu Aug 27, 2009 12:02 pm   Subject: [Xansys] [emag] error
________________________________

From: --email address suppressed-- on behalf of Varun Kumar S D
Sent: Thu 8/27/2009 8:17 AM
To: --email address suppressed--
Subject: [Xansys] [emag] error



Hi user ...
  Topic: [Xansys] How to plot average pressure over plate
mike.yaksh

Replies: 0
Views: 1143

PostForum: XANSYS   Posted: Mon Aug 17, 2009 5:52 am   Subject: [Xansys] How to plot average pressure over plate
Hi Dina,

If you are using the 126, the element data has the forces associated
with the element in NMISC 20 and 21 for the real and imaginary
components, respectively. I am not sure about a pressure u ...
  Topic: [Xansys] [emag] faster convergence
mike.yaksh

Replies: 2
Views: 1898

PostForum: XANSYS   Posted: Wed Aug 12, 2009 4:41 am   Subject: [Xansys] [emag] faster convergence
Hi Marek

Use of the 236 at rev12 might also be an improvement in 3D eddy current
modeling. Transients have been solved for solutions using micro second
time steps and the current was in excess of a ...
  Topic: Orthotropic material property for helix
mike.yaksh

Replies: 2
Views: 1987

PostForum: XANSYS   Posted: Mon Aug 10, 2009 7:19 am   Subject: [Xansys] Orthotropic material property for helix
Hi Nidhishri

You can specify a separate local coordinate system for each element in
which one of the axis is tangent to the helix at the centroid of the
element. This could be incorporated in a *DO l ...
  Topic: [Xansys] [Emag] Boundary problem
mike.yaksh

Replies: 0
Views: 1070

PostForum: XANSYS   Posted: Thu Aug 06, 2009 7:30 am   Subject: [Xansys] [Emag] Boundary problem
Hi Varunkumar

It would appear that you would model the surface of the cathode only,
correct. The Neumann condition means that it is a natural boundary
condition. With this problem, it would be bette ...
  Topic: [Xansys] [emag] faster convergence
mike.yaksh

Replies: 2
Views: 1898

PostForum: XANSYS   Posted: Thu Aug 06, 2009 5:39 am   Subject: [Xansys] [emag] faster convergence
Gabriella

This can mean one of four things.

1) The BH curve has a problem in that it is not smooth. Plot the NB^2
using tbplo,NB,materialnumber and look for any oscillations in the
curve. These osci ...
  Topic: [Xansys] [emag] coupled analysis with physics environment
mike.yaksh

Replies: 1
Views: 4643

PostForum: XANSYS   Posted: Thu Aug 06, 2009 5:22 am   Subject: [Xansys] [emag] coupled analysis with physics environment
Hi Gabriella

The first question indicated that the output said "ERROR". What is shown
below is a warning which would not stop the analysis. The error
indicated by

'While processing file b ...
  Topic: [emag] coupled analysis with physics environment
mike.yaksh

Replies: 1
Views: 1703

PostForum: XANSYS   Posted: Wed Aug 05, 2009 9:46 am   Subject: [emag] coupled analysis with physics environment
Hi Gabriella

You need to check the error file to see what is causing the error
condition. My suggestion is that you get the error condition corrected
and start the solutions over. The example of the ...
  Topic: [EMAG] -DREC Command
mike.yaksh

Replies: 3
Views: 2330

PostForum: XANSYS   Posted: Wed Aug 05, 2009 8:03 am   Subject: [Xansys] [EMAG] -DREC Command
Hi Peter

Three nodes are needed to define the length or radius of the primitive
and orientation in space.

The help manual for ANSYS shows that the sourc36 uses Biot-Savart to
compute the field due t ...
  Topic: [EMAG] -DREC Command
mike.yaksh

Replies: 3
Views: 2330

PostForum: XANSYS   Posted: Wed Aug 05, 2009 5:30 am   Subject: [EMAG] -DREC Command
Hi Peter

I am still coming up to speed on emag in WB, but my guess is that the 36
you are using is a coil primitive of some type. The node functions are
defining the position of coil having some Amp- ...
  Topic: [Emag] Boundary problem
mike.yaksh

Replies: 3
Views: 2296

PostForum: XANSYS   Posted: Wed Aug 05, 2009 5:15 am   Subject: [Emag] Boundary problem
Hi Varunkumar

This appears to be an electrical discharge problem, which is not
simulated as a standard EMAG problem with current (Amps) boundary
conditions. You could input the RSVX for both, apply ...
  Topic: Reading energy U(d,e,m) in ANSYS
mike.yaksh

Replies: 1
Views: 1674

PostForum: XANSYS   Posted: Fri Jul 31, 2009 5:53 am   Subject: [Xansys] Reading energy U(d,e,m) in ANSYS
Hi Ricardo

The manual says that they should be there (NMISC 16, 17 and 18, Table
98.3), but if they are nonsense, and the fields look correct; appears to
be an error. I would try using 226 which als ...
  Topic: [Xansys] [emag]Regarding Convergence Criteria
mike.yaksh

Replies: 3
Views: 2751

PostForum: XANSYS   Posted: Thu Jul 23, 2009 12:58 pm   Subject: [Xansys] [emag]Regarding Convergence Criteria
Hi Sabarigiri

The 111 is a layer of bricks on the outside. What you could do is to
allow the 111 which are at the edge of the model and are the conductor
to be just conductor elements. Use EMOD to ma ...
  Topic: [EMAG] - Relative permeability
mike.yaksh

Replies: 4
Views: 4896

PostForum: XANSYS   Posted: Thu Jul 23, 2009 4:40 am   Subject: [Xansys] [EMAG] - Relative permeability
Hi Peter

From the following link,

http://www.matweb.com/search/datasheet.aspx?MatGUID=a0655d261898456b958e
5f825ae85390

It states

Electrical Properties Metric English Comments

Electrical Resist ...
  Topic: [Xansys] [emag]Regarding Convergence Criteria
mike.yaksh

Replies: 3
Views: 2751

PostForum: XANSYS   Posted: Wed Jul 22, 2009 11:15 am   Subject: [Xansys] [emag]Regarding Convergence Criteria
Hi Sabarigiri

I would solve the problem first with all U's restrained to see if this
is a magnetics problem or a structural response problem.

I am assuming that the bars start and end at the edge of ...
  Topic: [EMAG] - Relative permeability
mike.yaksh

Replies: 4
Views: 4896

PostForum: XANSYS   Posted: Wed Jul 22, 2009 3:47 am   Subject: [Xansys] [EMAG] - Relative permeability
Hi Peter

Relative permeability is without units. It is the ratio of the material
permeability (H/m) to free space permeability (muzero) of 1.2566E-6 H/m
(by default in ANSYS).

ANSYS accepts relative ...
  Topic: [emag] displacement current in quasistatic harmonic analysis
mike.yaksh

Replies: 8
Views: 4912

PostForum: XANSYS   Posted: Tue Jul 21, 2009 5:25 am   Subject: [Xansys] [emag] displacement current in quasistatic harmonic
Hi Lodge

I am careful about taking differences between resultants. I would start
with the components first of each of the real and imaginary sets.

Mike Yaksh
NAC International
Norcross GA

-----Orig ...
  Topic: [Xansys] [emag] displacement current in quasistatic harmonic
mike.yaksh

Replies: 0
Views: 1047

PostForum: XANSYS   Posted: Tue Jul 21, 2009 4:38 am   Subject: [Xansys] [emag] displacement current in quasistatic harmonic
I forgot to add N O T .
Mike Yaksh
NAC International
Norcross GA

-----Original Message-----
From: Yaksh, Mike
Sent: Tuesday, July 21, 2009 7:35 AM
To: 'ANSYS User Discussion List'
Subject: [Xansys ...
  Topic: [emag] displacement current in quasistatic harmonic analysis
mike.yaksh

Replies: 8
Views: 4912

PostForum: XANSYS   Posted: Tue Jul 21, 2009 4:35 am   Subject: [Xansys] [emag] displacement current in quasistatic harmonic
Hi Lodge

The 231 supports use of a brick and the 232 is a tetrahedral element.
For the same size cylinder and same mesh divisions along the lines, the
volume would require more elements using 232 and ...
  Topic: [emag] displacement current in quasistatic harmonic analysis
mike.yaksh

Replies: 8
Views: 4912

PostForum: XANSYS   Posted: Mon Jul 20, 2009 10:46 am   Subject: [Xansys] [emag] displacement current in quasistatic harmonic
Hi Lodge

If the model is simple as in terms of some cylinders, I would use the
231.

If you have to perform the subtraction, I would think that you would
have to do it on a component basis to determi ...
  Topic: [EMAG]How to apply B.C. with flux both parallel and nomal?
mike.yaksh

Replies: 1
Views: 1423

PostForum: XANSYS   Posted: Fri Jul 17, 2009 4:31 am   Subject: [EMAG]How to apply B.C. with flux both parallel and nomal?
Hi Sinky

Magnets have permeability, though not large. The 97 should be used
mainly used in models with only free space. The 96 or the 117 (or 236
at Rev 12) will also work in the model. Without iro ...
  Topic: [EMAG] 3D coil and motor modeling
mike.yaksh

Replies: 3
Views: 4841

PostForum: XANSYS   Posted: Tue Jul 14, 2009 1:49 pm   Subject: [Xansys] [EMAG] 3D coil and motor modeling
Nidhishri,

If you use the 36, you will need to change the real constant as the
rotor is moved and the electrical angle is changed for each phase. This
can be done with RMODIF.

The 36 can be added at ...
  Topic: [EMAG] 3D coil and motor modeling
mike.yaksh

Replies: 3
Views: 4841

PostForum: XANSYS   Posted: Tue Jul 14, 2009 9:10 am   Subject: [Xansys] [EMAG] 3D coil and motor modeling
Hi Nidhishri

With motors you need to use either the 96 or the 117. If you can current
feed this you can use the 96 for the model (air/laminates) and the 36
for the coil sources. Quite a number of mot ...
  Topic: [Xansys] Transient physics analysis
mike.yaksh

Replies: 1
Views: 1632

PostForum: XANSYS   Posted: Mon Jul 13, 2009 10:29 am   Subject: [Xansys] Transient physics analysis
Hi Francois

The link shows the use of the PHYSICS command approach. In induction heating problems, the PHYSICS options are used, and the transient has to be solved in time segments and then transfer ...
  Topic: [Xansys] Rif: Re: Rif: Re: [EMAG]Voltage excitationwitha com
mike.yaksh

Replies: 0
Views: 1116

PostForum: XANSYS   Posted: Mon Jul 13, 2009 8:27 am   Subject: [Xansys] Rif: Re: Rif: Re: [EMAG]Voltage excitationwitha com
Hi,

The response about the use of "_" is a good warning about conflicts with
ANSYS macro parameters in the APDL directory. I am not aware of other
conflicts. I try to keep the number of v ...
  Topic: [Xansys] Rif: Re: [EMAG]Voltage excitation with a complexvol
mike.yaksh

Replies: 0
Views: 865

PostForum: XANSYS   Posted: Fri Jul 10, 2009 5:34 am   Subject: [Xansys] Rif: Re: [EMAG]Voltage excitation with a complexvol
Hi Marco

Thanks for the feedback. On the feedback, the 124 supports a voltage
and current controlled sources. That might be a possibility. Another
possibility is to have small load steps, and get th ...
  Topic: [Xansys] [EMAG]Voltage excitation with a complex voltage pro
mike.yaksh

Replies: 0
Views: 1028

PostForum: XANSYS   Posted: Thu Jul 09, 2009 6:05 am   Subject: [Xansys] [EMAG]Voltage excitation with a complex voltage pro
Hi Marco

The 124 real set for the IVS allows for 6 points (Time, voltage) as you
have pointed out. I have used the following method to extend that. I
define the real using 6 pairs, and set the TIME ...
  Topic: Boundary conditions in the cylindrical transformer
mike.yaksh

Replies: 3
Views: 3149

PostForum: XANSYS   Posted: Tue Jul 07, 2009 12:55 pm   Subject: [Xansys] Boundary conditions in the cylindrical transformer
Hi Radoslaw

If the system is linear, I am not sure why you could use the energy
approach and determine L1 and L2 and feed it with a current using a
static analysis. I am assuming the core is either ...
  Topic: Boundary conditions in the cylindrical transformer
mike.yaksh

Replies: 3
Views: 3149

PostForum: XANSYS   Posted: Tue Jul 07, 2009 6:42 am   Subject: [Xansys] Boundary conditions in the cylindrical transformer
Hi Radoslaw

With iron in the model, the 97 has some issues with the iron-air
interface. APDL from Bill is available to address these issues. With
the secondary not having a load, do you mean that i ...
  Topic: [Xansys] [SPAM] - Re: ANSYS EMAG - Email found in subject
mike.yaksh

Replies: 0
Views: 908

PostForum: XANSYS   Posted: Mon Jul 06, 2009 7:03 am   Subject: [Xansys] [SPAM] - Re: ANSYS EMAG - Email found in subject
Hi Emre

I have used infinite elements as opposed to specifying some type of constraint at the model edge. If you use an infinite boundary element it does not provide any type of restraint for the VO ...
  Topic: [Xansys] ANSYS EMAG
mike.yaksh

Replies: 0
Views: 1027

PostForum: XANSYS   Posted: Thu Jul 02, 2009 7:50 am   Subject: [Xansys] ANSYS EMAG
Hi Emre,

If air is modeled outside the stator, then at the model edge you will have a boundary condition; flux normal, flux parallel, or infinite element. It should be either the flux parallel of the ...
  Topic: [Xansys] [EMAG]Magneto-Structural analysis
mike.yaksh

Replies: 5
Views: 5510

PostForum: XANSYS   Posted: Tue Jun 30, 2009 5:58 am   Subject: [Xansys] [EMAG]Magneto-Structural analysis
Hi Gabriella

You mentioned the current and AZ conditions, but you did not state that
you also applied the MXWF flag on the part that needs to be loaded. JxB
does not get transferred automatically (I ...
  Topic: [Xansys] (EMAG) No load current computation in Transformer
mike.yaksh

Replies: 4
Views: 3407

PostForum: XANSYS   Posted: Thu Jun 25, 2009 9:58 pm   Subject: [Xansys] (EMAG) No load current computation in Transformer
Hi Ravindra,

If you are using a 50 Hz voltage input and if it a sine, I would do a harmonic. If this is a none sine, but the response is linear, and you are looking for the inductance only by doing ...
  Topic: [Xansys] (EMAG) No load current computation in Transformer
mike.yaksh

Replies: 0
Views: 985

PostForum: XANSYS   Posted: Thu Jun 25, 2009 7:06 am   Subject: [Xansys] (EMAG) No load current computation in Transformer
Hi Ravindra

If you are only modeling the primary side, then the current you are getting is from the primary side. Check the resistance computed for the coils from the NMISC,8 and the inductance can ...
  Topic: [Xansys] Field quantities in ansys/high frequency
mike.yaksh

Replies: 0
Views: 1095

PostForum: XANSYS   Posted: Fri Jun 19, 2009 9:55 am   Subject: [Xansys] Field quantities in ansys/high frequency
Hello Mirko,

The Table defining the 120 output does not show B or D, so you would
have to get them by ETAB, SADD. Using the ETABLE gets you a single value
per element. This means that the SADD would ...
  Topic: [Xansys] [Emag] Material properties in cylindrical coordinat
mike.yaksh

Replies: 4
Views: 5555

PostForum: XANSYS   Posted: Tue Jun 16, 2009 6:37 am   Subject: [Xansys] [Emag] Material properties in cylindrical coordinat
Hi Gabriella

If you use the origin, then the conductor must have its center along the
Z axis. The Z axis of the local coordinate system must coincide with the
center line of the conductor. When you ...
  Topic: [Xansys] [Emag] Material properties in cylindrical coordinat
mike.yaksh

Replies: 4
Views: 5555

PostForum: XANSYS   Posted: Tue Jun 16, 2009 3:28 am   Subject: [Xansys] [Emag] Material properties in cylindrical coordinat
Hi Gabriella

You can define a local coordinate system (LOCAL) and use the ESYS (see
AATT or VATT or ESYS) attribute for the element to associate that
coordinate system to the element axis. You can tu ...
  Topic: [Xansys] [EMAG] heat generation applied to nodes
mike.yaksh

Replies: 4
Views: 4235

PostForum: XANSYS   Posted: Fri Jun 12, 2009 2:20 pm   Subject: [Xansys] [EMAG] heat generation applied to nodes
Hi Gabriella

Part of the problem is not just the heat load, but also the C. If it is
small or really changing rapidly, that would also cause a problem. You
might try a larger C, to see if that works ...
  Topic: [Xansys] [EMAG] heat generation applied to nodes
mike.yaksh

Replies: 4
Views: 4235

PostForum: XANSYS   Posted: Fri Jun 12, 2009 5:11 am   Subject: [Xansys] [EMAG] heat generation applied to nodes
Hi Gabriella

Why can't you use BFE,elem,HGEN,1,heatvalue for the elements? If you
know the Watts over a region, you can compute the Watts/volume. You can
get the volume of the element by *GET,name,el ...
  Topic: [Xansys] [APDL] Forced substitution in v 8.1
mike.yaksh

Replies: 1
Views: 1202

PostForum: XANSYS   Posted: Thu Jun 11, 2009 10:50 am   Subject: [Xansys] [APDL] Forced substitution in v 8.1
Hi Bill,

This is an example of filename comprised of parameters

aa='case'
bb=20
cc='%aa%_bb_%bb%'

/out,%cc%,out
*stat,parm
/out
*list,%cc%,out


Mike Yaksh
NAC International
Norcross GA


-----Orig ...
  Topic: Toroidal magnetic coil as cylinder magnetic coil
mike.yaksh

Replies: 1
Views: 1502

PostForum: XANSYS   Posted: Thu Jun 11, 2009 4:44 am   Subject: [Xansys] Toroidal magnetic coil as cylinder magnetic coil
Hi Radoslaw

This might work if the radius is large to allow the an area defined by
Rinner*d(theta) to be about the same as Router*d(theta) else the
effective reluctance the system sees will be too di ...
  Topic: [Xansys] sorting of composites Layer data
mike.yaksh

Replies: 1
Views: 1323

PostForum: XANSYS   Posted: Wed Jun 10, 2009 8:33 am   Subject: [Xansys] sorting of composites Layer data
Hi Manoj,

Check the *GET for preprocessing for RCON like

*get,nameparameter,RCON,realsetnumber,CONST,iteminrealconstantset

The table 99.1 for the real set seems to list the material number in
item ...
  Topic: [Xansys] [APDL] arithmetics with complex numbers
mike.yaksh

Replies: 8
Views: 5689

PostForum: XANSYS   Posted: Wed Jun 10, 2009 7:35 am   Subject: [Xansys] [APDL] arithmetics with complex numbers
Hi, all

I am more interested in what software you used to get this expression. If I understand the sign function in Mathlab, which returns the sign of the argument, you can do this through a table.
...
  Topic: [Xansys] [emag]Time integrated voltage
mike.yaksh

Replies: 3
Views: 2858

PostForum: XANSYS   Posted: Tue Jun 09, 2009 5:54 am   Subject: [Xansys] [emag]Time integrated voltage
Hi Varun,

Why couldn't the resistance (which would include the eddy current effect
also) be computed from the power (I^2R, I being RMS) and the reactance
(omega*L) computed from magnetic stored energ ...
  Topic: [Xansys] [Emag]Uncovergin solution passing from ramped toste
mike.yaksh

Replies: 0
Views: 956

PostForum: XANSYS   Posted: Mon Jun 08, 2009 8:24 am   Subject: [Xansys] [Emag]Uncovergin solution passing from ramped toste
Hi Gabriella

I have had oscillation problems, but it was because I had an error in
the density (MPDATA) being zero at a particular temperature due to an
extra comma.

Reducing the time step may hel ...
  Topic: [Xansys] [emag]Time integrated voltage
mike.yaksh

Replies: 3
Views: 2858

PostForum: XANSYS   Posted: Mon Jun 08, 2009 8:12 am   Subject: [Xansys] [emag]Time integrated voltage
Hi Varunkumar

The integrated voltage is an analytical issue. The integrated voltage
would be interpreted as being the integral of the physical voltage. So
for peak value of the physical voltage the t ...
  Topic: [Xansys] ANSYS EMAG
mike.yaksh

Replies: 0
Views: 962

PostForum: XANSYS   Posted: Mon Jun 08, 2009 5:21 am   Subject: [Xansys] ANSYS EMAG
Hi Emre,


Typically this is some APDL, the user writes. For 2D, it can take the
form of

1) Put each coil section which is going to have a current density into a
component (element)
2) Put the comp ...
  Topic: [Xansys][Emag]Uncoverging solutionpassingfromrampedtostepped
mike.yaksh

Replies: 3
Views: 2629

PostForum: XANSYS   Posted: Fri Jun 05, 2009 8:32 am   Subject: [Xansys][Emag]Uncoverging solutionpassingfromrampedtostepped
Hi Gabriella,

I am not sure why the temperatures decrease for an adiabatic system. You
might check all the nodes again for some incorrect constraint in the
scond load step. If you use OUTRES, you ca ...
  Topic: [Xansys][Emag]Uncoverging solutionpassingfromrampedtostepped
mike.yaksh

Replies: 3
Views: 2629

PostForum: XANSYS   Posted: Fri Jun 05, 2009 5:10 am   Subject: [Xansys][Emag]Uncoverging solutionpassingfromrampedtostepped
Hi Gabriella,
So at the end of the first load you should have the initial steady state
conditions with some nil amount of heating and all the other conditions
on the model have been applied. In start ...
  Topic: [Xansys] [Emag]Uncoverging solution passingfromrampedtostepp
mike.yaksh

Replies: 0
Views: 1006

PostForum: XANSYS   Posted: Thu Jun 04, 2009 6:14 am   Subject: [Xansys] [Emag]Uncoverging solution passingfromrampedtostepp
Hi Gabriella

1) OK
2) You can define RSVX ,C with 21 values. I would enter properties at
Tc to allow for nil heating, and then properties starting from there
would increase rapidly (in terms of T)
3 ...
  Topic: [Xansys] [Emag]Uncoverging solution passing from rampedtoste
mike.yaksh

Replies: 0
Views: 954

PostForum: XANSYS   Posted: Wed Jun 03, 2009 7:51 am   Subject: [Xansys] [Emag]Uncoverging solution passing from rampedtoste
Hi Gabriella

In the superconducting state, you have 200A in the conductor with RVX
that is near zero, and the temperatures of the system reflect the
superconducting state. The temperatures then begi ...
  Topic: [Xansys] [Emag]Uncoverging solution passing from ramped to s
mike.yaksh

Replies: 1
Views: 1642

PostForum: XANSYS   Posted: Wed Jun 03, 2009 5:01 am   Subject: [Xansys] [Emag]Uncoverging solution passing from ramped to s
Hi Gabriella

In a previous posting, it was indicated that the KBC,1 would stepped the
load, and if that was not the physical problem then you need to solve a
steady state problem first. If you step t ...
  Topic: [Xansys] [Emag] temperature evolution during a quench
mike.yaksh

Replies: 1
Views: 1519

PostForum: XANSYS   Posted: Tue Jun 02, 2009 8:08 am   Subject: [Xansys] [Emag] temperature evolution during a quench
Hi Gabriella

If KBC was left to default, then the loading is ramped not stepped. So
that when the current was applied at its full value, then when the
solution is started, the first time step does n ...
  Topic: [Xansys] [THERM] Method of Analysis
mike.yaksh

Replies: 1
Views: 1362

PostForum: XANSYS   Posted: Sat May 30, 2009 6:56 am   Subject: [Xansys] [THERM] Method of Analysis
Hi Balaji

Since you able to post on XANSYS, you must have already have access to
the on-line documentation. Do a HELP,69 and follow all the links, it
will provide links to information supporting the ...
  Topic: Meshing at a higher relevance / Solver out of memory (EMAG)
mike.yaksh

Replies: 1
Views: 1468

PostForum: XANSYS   Posted: Fri May 29, 2009 5:46 am   Subject: [Xansys] Meshing at a higher relevance / Solver out of memor
Hi Peter

If you are solving 2D problems, the 4Gb should be sufficient. If you are
solving 3D, it takes very little effort to generate a 3 million node
problem involving eddy currents even for skin ef ...
  Topic: [Xansys] [SPAM] - Re: Magnetostatic Analysis - Email found i
mike.yaksh

Replies: 0
Views: 1037

PostForum: XANSYS   Posted: Thu May 28, 2009 5:59 am   Subject: [Xansys] [SPAM] - Re: Magnetostatic Analysis - Email found i
Hi Emre

I would think you need the body first before the winding is inserted into the model. If I needed some fast answers, I think I would try the 2D Classic approach. I have been using Classic EMA ...
  Topic: [Xansys] Magnetostatic Analysis
mike.yaksh

Replies: 0
Views: 909

PostForum: XANSYS   Posted: Thu May 28, 2009 5:31 am   Subject: [Xansys] Magnetostatic Analysis
Hi Emre
In 3D models, you can use the vector plot to see the direction and magnitude of the field. When plotting the H vector in magnets you can verify the direction of magnetization as well (magnet ...
  Topic: [Xansys] Regarding powerh
mike.yaksh

Replies: 2
Views: 2240

PostForum: XANSYS   Posted: Thu May 28, 2009 5:19 am   Subject: [Xansys] Regarding powerh
Hi Varunkumar

Certain magnetic macros will use *UILI to display a summary to the
screen. If you have a *DO to cycle through the POWERH macro, then each
time it finishes it will display the summary so ...
  Topic: [Xansys] Regarding powerh
mike.yaksh

Replies: 2
Views: 2240

PostForum: XANSYS   Posted: Wed May 27, 2009 6:07 am   Subject: [Xansys] Regarding powerh
Hi Varunkumar

If you apply a current to a conductor and change the frequency (with a
constant current) then the power should change since I^2R is changing
since R is changing since the eddy currents ...
  Topic: [EMAG] solution time
mike.yaksh

Replies: 15
Views: 8770

PostForum: XANSYS   Posted: Wed May 27, 2009 5:06 am   Subject: [Xansys] [EMAG] solution time
Hi Sandeep,

One way of simulating the movement might be to change the RSVX from
being conductive (small) to a large value. The problem that might be
generated then would be a convergence problem caus ...
  Topic: [EMAG] solution time
mike.yaksh

Replies: 15
Views: 8770

PostForum: XANSYS   Posted: Tue May 26, 2009 8:08 am   Subject: [Xansys] [EMAG] solution time
Hi Sandeep,

2) Not sure what the problem was, but if the field looks to be
acceptable in that it satisfies the boundary conditions-that's good.

3) When I need to alter things between the load steps ...
  Topic: [EMAG] solution time
mike.yaksh

Replies: 15
Views: 8770

PostForum: XANSYS   Posted: Thu May 21, 2009 4:50 am   Subject: [Xansys] [EMAG] solution time
Hi Sandeep,

In item 2), what happened when keyopt(1)=1 and you ran the transient?

I have not tried item 7), since I use keyopt(1)=1

Mike Yaksh
NAC International
Norcross GA

-----Original Message- ...
  Topic: Resistance in 2D and 3D model
mike.yaksh

Replies: 3
Views: 2223

PostForum: XANSYS   Posted: Mon May 18, 2009 1:29 pm   Subject: [Xansys] Resistance in 2D and 3D model
Hi Radoslaw

If this is a static analysis, you are basically solving a electrical
conduction problem, only. The magnetic field does not contribute to any
redistribution of the current due to an eddy ...
  Topic: Resistance in 2D and 3D model
mike.yaksh

Replies: 3
Views: 2223

PostForum: XANSYS   Posted: Mon May 18, 2009 9:09 am   Subject: [Xansys] Resistance in 2D and 3D model
Hi Radoslaw

Is this static or a harmonic at some frequency? How does the current
distribution over the cross section between the 2D and the 3D compare
between the two models? What are the peak valu ...
  Topic: [EMAG] solution time
mike.yaksh

Replies: 15
Views: 8770

PostForum: XANSYS   Posted: Mon May 18, 2009 8:22 am   Subject: [Xansys] [EMAG] solution time
Hi Sandeep

2) If you apply the VOLT CP and amps (positive) at one end of the
conductor, and the VOLT constraint to the other end, the current will
flow from the end with the CP and AMPS to the end ...
  Topic: [EMAG] solution time
mike.yaksh

Replies: 15
Views: 8770

PostForum: XANSYS   Posted: Mon May 18, 2009 4:48 am   Subject: [Xansys] [EMAG] solution time
Hi Sandeep

2) I have had some success in not using solenoidal option when the
elements are shaped reasonably well as with a brick mesh.

3) You may not be specifying any inductance in the model, but ...
  Topic: [Xansys] RE : [EMAG] Meshing in magnetostaticanalysis
mike.yaksh

Replies: 0
Views: 902

PostForum: XANSYS   Posted: Mon May 18, 2009 3:59 am   Subject: [Xansys] RE : [EMAG] Meshing in magnetostaticanalysis
Hi Laurent

The FMAGBC is still useful to apply the flags for Maxwell's' stress
tensor and the virtual work flags to get the force on the elements in
the element data base (ETAB) from which the torque ...
  Topic: [EMAG] Meshing in magnetostaticanalysis
mike.yaksh

Replies: 0
Views: 1030

PostForum: XANSYS   Posted: Sun May 17, 2009 7:34 am   Subject: [EMAG] Meshing in magnetostaticanalysis
Hi Laurent

It would appear that you are using Classic and I think you are using the
117. It appears that you are building a cross section and extruding it
with the VEXT (probably in the axial directi ...
  Topic: [Xansys] RE : [EMAG] Meshing in magnetostatic analysis --ema
mike.yaksh

Replies: 0
Views: 899

PostForum: XANSYS   Posted: Sat May 16, 2009 9:31 am   Subject: [Xansys] RE : [EMAG] Meshing in magnetostatic analysis --ema
Hi Laurent

If you can get a solution, then it must have been a warning. Errors
normally do allow a solution to obtained with out some additional
commands.

In comparison of the torques with Flux 3D; ...
  Topic: [EMAG] solution time
mike.yaksh

Replies: 15
Views: 8770

PostForum: XANSYS   Posted: Fri May 15, 2009 6:59 am   Subject: [Xansys] [EMAG] solution time
Hi Sandeep,

2) Which is the primary coil, i.e., the coil to which the current is
being applied, and which is the secondary coil, i.e., the coil in which
the current is being induced, just like in a t ...
  Topic: [Xansys] R: [EMAG]Unconverging solution
mike.yaksh

Replies: 25
Views: 20053

PostForum: XANSYS   Posted: Fri May 15, 2009 6:04 am   Subject: [Xansys] R: [EMAG]Unconverging solution
Gabriella,

The model posted on the link generated about 64,000 tets. The mesh was
simplified with larger elements, which uses the same dimensions for the
copper. It produces a more reasonable tempera ...
  Topic: [EMAG] solution time
mike.yaksh

Replies: 15
Views: 8770

PostForum: XANSYS   Posted: Thu May 14, 2009 12:08 pm   Subject: [Xansys] [EMAG] solution time
Sandeep,

1) I would check the amount of storage required. I found out really
quick how easy it was to mesh a 4 million node 3D eddy current problem
and outstretch the 16 Gb of RAM I had.

2) Is the ...
  Topic: [Xansys] FW: Meshing in magnetostatic analysis
mike.yaksh

Replies: 2
Views: 2132

PostForum: XANSYS   Posted: Thu May 14, 2009 11:37 am   Subject: [Xansys] FW: Meshing in magnetostatic analysis
Martin,

Thanks for the clarification. All the more reasons for me to start doing
things in WB. I would like to put some of my macros into Snippets.

Mike Yaksh
NAC International
Norcross GA

-----Ori ...
  Topic: [Xansys] FW: Meshing in magnetostatic analysis
mike.yaksh

Replies: 2
Views: 2132

PostForum: XANSYS   Posted: Thu May 14, 2009 6:40 am   Subject: [Xansys] FW: Meshing in magnetostatic analysis
Hi Emre,

For me the preferred mesh is the brick, but in WB, you have the tets. I am not familiar with WB to distinguish the effects of the meshing of tets. I would recommend meshing both ways and loo ...
  Topic: [EMAG] solution time
mike.yaksh

Replies: 15
Views: 8770

PostForum: XANSYS   Posted: Thu May 14, 2009 5:53 am   Subject: [Xansys] [EMAG] solution time
Hi Sandeep

1) For models where I really did not have sufficient RAM, the problem
would run forever (it seemed).

2) If you use the solenoidal formulation, the matrices are UNsymmetric,
this would mak ...
  Topic: [Xansys] R: [EMAG]Unconverging solution
mike.yaksh

Replies: 25
Views: 20053

PostForum: XANSYS   Posted: Thu May 14, 2009 4:15 am   Subject: [Xansys] R: [EMAG]Unconverging solution
Gabriella,

The densities for epoxy and copper are switched. The copper RSVX shows
nOhm-m. Put the actual MPDATA and MPTEMP commands for all the material
properties on the site, not the table values. ...
  Topic: [Xansys] R: [EMAG]Unconverging solution
mike.yaksh

Replies: 25
Views: 20053

PostForum: XANSYS   Posted: Wed May 13, 2009 6:48 am   Subject: [Xansys] R: [EMAG]Unconverging solution
The sketch needs to shows the assignment of the materials and what/where
boundary conditions were employed in the analysis. The RSVX table is
shown in nOhms-m. What was used in the input(It needs to ...
  Topic: [Xansys] Stress transfer
mike.yaksh

Replies: 0
Views: 1130

PostForum: XANSYS   Posted: Wed May 13, 2009 6:19 am   Subject: [Xansys] Stress transfer
Hi Hector,

When you mention piezomagnetic, do you mean magnetoelastic (or magnetostrictive?) in which the deformation of the material results in a change in the magnetic field? There are two ways to ...
  Topic: [Xansys] R: [EMAG]Unconverging solution
mike.yaksh

Replies: 25
Views: 20053

PostForum: XANSYS   Posted: Tue May 12, 2009 8:42 am   Subject: [Xansys] R: [EMAG]Unconverging solution
Hi Gabriella

Some problems such these can be a problem to solve as a transient. Can
you put together a description with some plots (where the conditions are
applied, and the material data for C, dens ...
  Topic: [Xansys] R: [EMAG]Unconverging solution
mike.yaksh

Replies: 25
Views: 20053

PostForum: XANSYS   Posted: Tue May 12, 2009 6:49 am   Subject: [Xansys] R: [EMAG]Unconverging solution
Hi Gabriella

I have seen in some superconducting problems where the specific heat can
change by orders of magnitudes in such a transient. How does the C vary
with temperature? Problems with large hea ...
  Topic: [Xansys] R: [EMAG]Unconverging solution
mike.yaksh

Replies: 25
Views: 20053

PostForum: XANSYS   Posted: Mon May 11, 2009 9:27 am   Subject: [Xansys] R: [EMAG]Unconverging solution
Hi Gabriella

The conditions applied to the surface of the conductor needs to reflect
the physical conditions. Applying a CP to all the nodes on the surface
would require that some physical condition ...
  Topic: [Xansys] R: [EMAG]Unconverging solution
mike.yaksh

Replies: 25
Views: 20053

PostForum: XANSYS   Posted: Fri May 08, 2009 1:43 pm   Subject: [Xansys] R: [EMAG]Unconverging solution
Gabriella,

When you do a plot of the temperature, the legend may be such that the
radial gradient may not be apparent. IF you define a path (PATH, PPATH,
PDEF) across the cross section of the wire fo ...
  Topic: [Xansys] R: [EMAG]Unconverging solution
mike.yaksh

Replies: 25
Views: 20053

PostForum: XANSYS   Posted: Fri May 08, 2009 3:36 am   Subject: [Xansys] R: [EMAG]Unconverging solution
Hi Gabriella,

Before solving any type of transient, I would get the steady state 69
solution to work for a simpler problem, like this to see the current JS,
to check the heat generation, the VOLT var ...
  Topic: [Xansys] [EMAG] Simulation in Wb
mike.yaksh

Replies: 0
Views: 1054

PostForum: XANSYS   Posted: Mon May 04, 2009 5:40 am   Subject: [Xansys] [EMAG] Simulation in Wb
Hi Rabeb
I am assuming that the whole machine is being modeled.

The bad torque values could be due to a number of items
1) The magnetization could be incorrect for the magnets
2) The current in the c ...
  Topic: [Xansys] R: [EMAG]Unconverging solution
mike.yaksh

Replies: 25
Views: 20053

PostForum: XANSYS   Posted: Thu Apr 30, 2009 10:32 am   Subject: [Xansys] R: [EMAG]Unconverging solution
Gabriella,

On one end, the face would have all the nodes coupled in VOLT, and use
F,Nodenumber,AMPS,value to apply the amps. At the other end of the
conductor, you would apply the VOLT constraint (DA ...
  Topic: [Xansys] [EMAG]Unconverging solution
mike.yaksh

Replies: 6
Views: 8848

PostForum: XANSYS   Posted: Thu Apr 30, 2009 7:20 am   Subject: [Xansys] [EMAG]Unconverging solution
Martin,

You are correct. If she means perpendicular to the plane, it has to be
the 69. What sent me off in the 67 direction was the first question
about the 67/55 in the model. I think the model nee ...
  Topic: [Xansys] [EMAG]Unconverging solution
mike.yaksh

Replies: 6
Views: 8848

PostForum: XANSYS   Posted: Thu Apr 30, 2009 5:58 am   Subject: [Xansys] [EMAG]Unconverging solution
Gabriella

Plane67 is a 2D model, so you need to use the DL for the specification
of the VOLT constraint on a line at the other end of the conductor to
make the current from the section having the AMP ...
  Topic: [Xansys] [EMAG]Unconverging solution
mike.yaksh

Replies: 6
Views: 8848

PostForum: XANSYS   Posted: Wed Apr 29, 2009 11:01 am   Subject: [Xansys] [EMAG]Unconverging solution
Hi Gabriella,

To get the current to flow, you need to constrain the VOLT at the
opposite end of the conductor and as others indicated there could be
other errors in the input to cause the "No co ...
  Topic: [Xansys] [EMAG] Initial conditions: current
mike.yaksh

Replies: 0
Views: 966

PostForum: XANSYS   Posted: Wed Apr 29, 2009 5:43 am   Subject: [Xansys] [EMAG] Initial conditions: current
Hi Gabriella

Prior to the event to be simulated the system is at some steady state
condition in terms of current, boundary conditions, properties. This
condition serves as the initial condition for ...
  Topic: [Xansys] [SPAM] - Re: [SPAM] - Re: [SPAM] - Re:Thermal-Elect
mike.yaksh

Replies: 0
Views: 1007

PostForum: XANSYS   Posted: Fri Apr 24, 2009 5:19 am   Subject: [Xansys] [SPAM] - Re: [SPAM] - Re: [SPAM] - Re:Thermal-Elect
Hi Emre,

By forced, do you mean that you have a pump forcing the oil to flow through the system and to extract the heat from the coils and means of fluid flow the heat is rejected at the surface of t ...
  Topic: [Xansys] convert time domain displacement data to frequency
mike.yaksh

Replies: 0
Views: 977

PostForum: XANSYS   Posted: Fri Apr 24, 2009 4:02 am   Subject: [Xansys] convert time domain displacement data to frequency
Hi Jaspreet

If you want to see the frequency response of the structure at some
point, use the RESP to get the frequency content of that response. The
theory manual has a description of what is being ...
  Topic: [Xansys] EMAG - time step size
mike.yaksh

Replies: 8
Views: 5390

PostForum: XANSYS   Posted: Wed Apr 22, 2009 8:56 am   Subject: [Xansys] EMAG - time step size
Hi Varunkumar

Attached is simple model using circ124 2 Amp current fed coil for a
planar model at 100 Hz. The transient is for 2 cycles. This was done at
Rev 11. With other revisions the Boolean may ...
  Topic: [Xansys] [SPAM] - Re: [SPAM] - Re: Thermal-Electric Analysis
mike.yaksh

Replies: 0
Views: 882

PostForum: XANSYS   Posted: Tue Apr 21, 2009 6:53 am   Subject: [Xansys] [SPAM] - Re: [SPAM] - Re: Thermal-Electric Analysis
Hi Emre

It would appear that some boundary conditions are missing if you are getting 5,200C. I would also check the power loss in the thermal model using /PBF,HGEN,1 and it should look like the PLET ...
  Topic: [Xansys] EMAG - time step size
mike.yaksh

Replies: 8
Views: 5390

PostForum: XANSYS   Posted: Tue Apr 21, 2009 4:52 am   Subject: [Xansys] EMAG - time step size
Hi Varunkumar

There may be other issues, but I would strive to get the correct input
reflected back to me. When you apply a sine boundary condition with
sufficient time steps, you should be able to g ...
  Topic: [Xansys] EMAG - time step size
mike.yaksh

Replies: 8
Views: 5390

PostForum: XANSYS   Posted: Mon Apr 20, 2009 5:18 am   Subject: [Xansys] EMAG - time step size
Hi Varunkumar

I think I need some more details about your problem. You indicate that
you are feeding the model with a current, and you are plotting a
current. The current you are plotting: Is this ...
  Topic: [Xansys] EMAG - time step size
mike.yaksh

Replies: 8
Views: 5390

PostForum: XANSYS   Posted: Sat Apr 18, 2009 7:01 am   Subject: [Xansys] EMAG - time step size
Hi Varunkumar

The boundary conditions appear to use a current (not a voltage). So, the
plot you are generating is just your input? If so, it would appear that
you have way to few time steps in the in ...
  Topic: [Xansys] [SPAM] - Re: Thermal-Electric Analysis - Email foun
mike.yaksh

Replies: 0
Views: 1008

PostForum: XANSYS   Posted: Sat Apr 18, 2009 6:47 am   Subject: [Xansys] [SPAM] - Re: Thermal-Electric Analysis - Email foun
Hi Emre

I think some items need clarification.

If this coil is 360 degrees, the 5m diameter and 2.2m length is inconsistent. If this is part of an arc, then I assuming you are doing 3D, correct? W ...
  Topic: [Xansys] Thermal-Electric Analysis
mike.yaksh

Replies: 7
Views: 6189

PostForum: XANSYS   Posted: Thu Apr 16, 2009 9:03 am   Subject: [Xansys] Thermal-Electric Analysis
Hi Emre

In a skin effect problem you have the difference between JT and JS, but in the 226 with keyopt(1)=110, you do not. An example of a bar is below. The help for the 226 explains that the JS is ...
  Topic: [Xansys] [EMAG] Iron losses
mike.yaksh

Replies: 0
Views: 1004

PostForum: XANSYS   Posted: Wed Apr 15, 2009 4:44 am   Subject: [Xansys] [EMAG] Iron losses
Hi Rabeb

I am assuming the iron losses are in the laminates and being a laminate
means that the iron loss is dependent on the laminate material, laminate
thickness and the frequency. The core loss d ...
  Topic: [Xansys] [EMAG] Getting torque in WB
mike.yaksh

Replies: 0
Views: 965

PostForum: XANSYS   Posted: Wed Apr 15, 2009 4:07 am   Subject: [Xansys] [EMAG] Getting torque in WB
Hi Rabeb


The macro EMFT calls the macro FMGN to do the calculation. The summary
of the calculation is written to the file EMFT.OUT

Mike Yaksh
NAC International
Norcross GA

-----Original Message-- ...
  Topic: [Xansys] Preliminary HPC results with new Nehalem Xeons
mike.yaksh

Replies: 12
Views: 9935

PostForum: XANSYS   Posted: Thu Apr 09, 2009 5:43 am   Subject: [Xansys] Preliminary HPC results with new Nehalem Xeons
One of the most positive things that I saw in ANSYS Rev 12 is that it
was able to solve larger problems in the EMAG area. The new element in
3D was used to solve a 3.5+million node 3D eddy current mod ...
  Topic: [Xansys] Thermal-Electric Analysis
mike.yaksh

Replies: 7
Views: 6189

PostForum: XANSYS   Posted: Mon Apr 06, 2009 8:37 am   Subject: [Xansys] Thermal-Electric Analysis
Hi Emre

I think you may be referring the thermal conductivity. Each material
needs to have one; basics. On the film coefficient; if you expect to
have the oil conduct the heat to its surface, then o ...
  Topic: [Xansys] (EMAG) Query in Force Computation
mike.yaksh

Replies: 2
Views: 1717

PostForum: XANSYS   Posted: Mon Apr 06, 2009 5:56 am   Subject: [Xansys] (EMAG) Query in Force Computation
Hi Ravindra

Usually they do not match because the mesh may need to be refined.

The macro FMAGSUM was written such that it does not print out the radial
component since it is not a net force.

Mike Y ...
  Topic: [Xansys] Thermal-Electric Analysis
mike.yaksh

Replies: 7
Views: 6189

PostForum: XANSYS   Posted: Wed Apr 01, 2009 10:39 am   Subject: [Xansys] Thermal-Electric Analysis
Hi Emre
Based on your description, the stranded conductor will not exhibit any eddy current effect either due to the use of a DC current or the frequency sufficiently low for the conductor under consi ...
  Topic: Multiphysics HF Electromagnetic - Structural
mike.yaksh

Replies: 1
Views: 1656

PostForum: XANSYS   Posted: Mon Mar 30, 2009 5:48 am   Subject: [Xansys] Multiphysics HF Electromagnetic - Structural
Hi Daniel
I would build the HF model, air, PML and all else. When you solve the
structural model, assign weak properties to the air. You could probably
set the displacements of the PML to zero, elimi ...
  Topic: Large Deformation using BEAM elements
mike.yaksh

Replies: 3
Views: 2887

PostForum: XANSYS   Posted: Mon Mar 30, 2009 5:38 am   Subject: [Xansys] Drawing a screw thread
Hi Hervandil

Attached is some untested code which was cut out of another macro to
generate some thread.

/out,helix,out
! generates the thread


fini
/nerr,0,1e4
/cle


/prep7

r=.7288/2 !.375 ! ...
  Topic: [Xansys] Thermal-Electric Analysis
mike.yaksh

Replies: 7
Views: 6189

PostForum: XANSYS   Posted: Thu Mar 26, 2009 9:08 am   Subject: [Xansys] Thermal-Electric Analysis
Hi Emre

In thermal modeling, Joule heating is heat generation and is W/m^3.
Current density is A/m^2. For a planar model it is a unit length normal
to the page. If you do a steady state thermal anal ...
  Topic: [Xansys] Thermal-Electric Analysis
mike.yaksh

Replies: 7
Views: 6189

PostForum: XANSYS   Posted: Thu Mar 26, 2009 7:26 am   Subject: [Xansys] Thermal-Electric Analysis
Hi Emre

The solution process depends on what your problem is.

1) If this is a DC problem, then you can use the solid69 which has the temp and the volt dofs. So in one model, you need the material pr ...
  Topic: [Xansys] EMAG-Output
mike.yaksh

Replies: 1
Views: 1539

PostForum: XANSYS   Posted: Mon Mar 23, 2009 5:37 am   Subject: [Xansys] EMAG-Output
Hi Emre

There is a reaction for each node (which is constrained with VOLT), which is the current. The distribution of the current depends on the problem geometry, but the sum of the reactions should ...
  Topic: [Xansys] [Emag]circuit coupling
mike.yaksh

Replies: 0
Views: 1010

PostForum: XANSYS   Posted: Mon Mar 23, 2009 5:08 am   Subject: [Xansys] [Emag]circuit coupling
Hi Varunkumar,

Since these two terms are additive, I am not sure why you could not put
two current sources in series; one using the sine function one with
keyopt(2)=0 (constant, for the first term) a ...
  Topic: [Xansys] *VWRITE COMMAND Help
mike.yaksh

Replies: 1
Views: 2053

PostForum: XANSYS   Posted: Tue Mar 17, 2009 5:23 am   Subject: [Xansys] *VWRITE COMMAND Help
Hi Uys

You might do something like this in the macro writing out the
temperatures

/nopr
/out,bfe_t,mac
*msg,info
/nopr $ esel,all !
*vwrite,sequ,bfe_temp(1)
('BFE,',f9.0,',TEMP,1,',f15.2)
/out
/go ...
  Topic: [Xansys] [APDL][EMAG] writing in workbench with APDL
mike.yaksh

Replies: 1
Views: 2203

PostForum: XANSYS   Posted: Mon Mar 16, 2009 3:49 am   Subject: [Xansys] [APDL][EMAG] writing in workbench with APDL
Hi Rebhi

In classic, you could have the rotor and stator share a common boundary
in the air gap and use CEINTF to connect them in an analytical sense.
With the movement of the rotor, no new nodes nee ...
  Topic: [Xansys] Thermal analysis
mike.yaksh

Replies: 2
Views: 2287

PostForum: XANSYS   Posted: Thu Mar 12, 2009 5:28 am   Subject: [Xansys] Thermal analysis
Hi Dhaval

Could you give a little more information about the problem? Is the 2D
model a cross section of the 3D? If so, which cross section? When you
say "along the entire length", which l ...
  Topic: [Xansys] themoplastic embedded and EM field
mike.yaksh

Replies: 6
Views: 4234

PostForum: XANSYS   Posted: Wed Mar 11, 2009 7:08 am   Subject: [Xansys] R: themoplastic embedded and EM field
Hi Andrea

In the 1Mhz range, this would still be an inductive problem. From what I have seen in resolvers in the kHz range, eddy currents are predominant, not hysteresis. This means that you need to ...
  Topic: [Xansys] [Emag]Force in a current carrying conductor
mike.yaksh

Replies: 1
Views: 1360

PostForum: XANSYS   Posted: Mon Mar 09, 2009 3:51 am   Subject: [Xansys] [Emag]Force in a current carrying conductor
Hi Varunkumar,

They may be some other issues, but the outer boundary of .2 meters for
50kA is too small. In bus problems with no iron you need to include the
infinite element and put it away from the ...
  Topic: [Xansys] themoplastic embedded and EM field
mike.yaksh

Replies: 6
Views: 4234

PostForum: XANSYS   Posted: Sat Mar 07, 2009 10:02 am   Subject: [Xansys] themoplastic embedded and EM field
Hi Andrea

With polymers being in the model and the metals you have listed, it would be safe to say that the metal temperature dependent properties need not be considered.

I am assuming that the pol ...
  Topic: [Xansys] Help
mike.yaksh

Replies: 9
Views: 10899

PostForum: XANSYS   Posted: Thu Mar 05, 2009 11:50 am   Subject: [Xansys] Help
Hi Emre,

Check the material properties.

This may not affect the error, but the start and end of the bar must be
at the model edge.

Make sure the enclosure is connected to the conductor. A lack of
c ...
  Topic: [EMAG] Forces in a 3-D transient Magnetic Analysis
mike.yaksh

Replies: 14
Views: 10135

PostForum: XANSYS   Posted: Thu Mar 05, 2009 10:32 am   Subject: [Xansys] [EMAG] Forces in a 3-D transient Magnetic Analysis
Hi Peter,

It may be an issue of plotting.

When graphs are to be generated from transients where the number of sets
may, I would use

_mg1=1
*get,n_set,active,,set,nset
*set,resu
*dim,resu,table,n_se ...
  Topic: [EMAG] Forces in a 3-D transient Magnetic Analysis
mike.yaksh

Replies: 14
Views: 10135

PostForum: XANSYS   Posted: Tue Mar 03, 2009 8:39 am   Subject: [Xansys] [EMAG] Forces in a 3-D transient Magnetic Analysis
Hi Peter,

It relates back to a form Bo*exp(j*omega*t) for harmonic solutions, and
since the force is basically quadratic as B^2 (B being complex) then
this produces a result such as (Bo^2)*exp(2*j*om ...
  Topic: [EMAG] Forces in a 3-D transient Magnetic Analysis
mike.yaksh

Replies: 14
Views: 10135

PostForum: XANSYS   Posted: Tue Mar 03, 2009 7:24 am   Subject: [Xansys] [EMAG] Forces in a 3-D transient Magnetic Analysis
Hi Peter

The sine signal will generate an oscillatory component at 2*frequency.
So at 1/2 the period the 2*frequency will show a complete "revolution".
The ANSYS harmonic gives the time ave ...
  Topic: [Xansys] themoplastic embedded and EM field
mike.yaksh

Replies: 6
Views: 4234

PostForum: XANSYS   Posted: Fri Feb 27, 2009 8:57 am   Subject: [Xansys] themoplastic embedded and EM field
Hi Andea

I did a similar simulation for using embedded metal in a polymer to melt the polymer, in the 90's. A harmonic analysis was used to generate the heat generation, followed by a thermal transie ...
  Topic: [EMAG] Forces in a 3-D transient Magnetic Analysis
mike.yaksh

Replies: 14
Views: 10135

PostForum: XANSYS   Posted: Thu Feb 26, 2009 12:02 pm   Subject: [Xansys] [EMAG] Forces in a 3-D transient Magnetic Analysis
Hi Peter

I tried the static option and got a force. With the transient, I saw
the following message with solenoidal option:

Degenerate solid117 elements are not recommended for transient ...
  Topic: [Xansys] themoplastic embedded and EM field
mike.yaksh

Replies: 6
Views: 4234

PostForum: XANSYS   Posted: Thu Feb 26, 2009 11:58 am   Subject: [Xansys] themoplastic embedded and EM field
Hi Andrea

The first thing to decide is how the thermal affects the magnetic and
electrical properties. If the increase in the temperature does not
really affect the electrical or magnetic properties ...
  Topic: [EMAG] Forces in a 3-D transient Magnetic Analysis
mike.yaksh

Replies: 14
Views: 10135

PostForum: XANSYS   Posted: Wed Feb 25, 2009 5:04 am   Subject: [Xansys] [EMAG] Forces in a 3-D transient Magnetic Analysis
Hi Peter,

It looks like there is a problem with 117 transient and forces. I have
seen the 117 used for induction heating, but for that we are interested
in the power so a thermal transient can be do ...
  Topic: [EMAG] Forces in a 3-D transient Magnetic Analysis
mike.yaksh

Replies: 14
Views: 10135

PostForum: XANSYS   Posted: Tue Feb 24, 2009 3:25 pm   Subject: [Xansys] [EMAG] Forces in a 3-D transient Magnetic Analysis
Hi Peter
Have you tried using PMGTRAN in the time history post processor? I am
not sure that you need the solenoidal option for the iron which is not
driven by an applied current. No issues about th ...
  Topic: [Xansys] [EMAG]SOLID117 vs. SOLID97 - Senergy returns differ
mike.yaksh

Replies: 1
Views: 1826

PostForum: XANSYS   Posted: Thu Feb 19, 2009 7:56 am   Subject: [Xansys] [EMAG]SOLID117 vs. SOLID97 - Senergy returns differ
Hi Ibrahim

How does the current and current density distribution in the 117 models
compare? If these are the same, then it would appear the 117 with the
124 has a problem. The 117 does not have an ...
  Topic: [Xansys] [EMAG][PC] Ansys closes withour error message durin
mike.yaksh

Replies: 1
Views: 2871

PostForum: XANSYS   Posted: Thu Feb 19, 2009 6:59 am   Subject: [Xansys] [EMAG][PC] Ansys closes withour error message durin
Hi Florian
500,000 elements sounds a fairly large model if tets are used. If you have a university version you may have exceeded some limit. What are you trying to model? I have some models really ...
 
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