Ansoft Maxwell, "cannot apply Current Excitation to non planar entity" error

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Discussion Overview

The discussion revolves around troubleshooting issues encountered while using Ansoft Maxwell for simulating a motor design imported from SolidWorks. Participants explore problems related to applying current excitation, matrix errors, and simulation performance, as well as strategies for analyzing results.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Mathematical reasoning
  • Experimental/applied

Main Points Raised

  • One participant encounters an error when trying to assign current excitation to a coil, questioning whether a 2D surface is required.
  • Another participant suggests creating a section of the object to define a surface for current assignment.
  • A participant expresses concerns about their computer's processing power for simulations and seeks recommendations for high CPU power server services.
  • Some participants propose trying the simulation despite potential long processing times, suggesting the use of symmetry to reduce computation time.
  • A participant reports a matrix error related to geometry selection and seeks clarification on the purpose of the matrix in their project.
  • Another participant explains that the matrix represents the inductance of the center coil and discusses the implications of mesh density on simulation accuracy.
  • Concerns are raised about the rotor intersecting with the stator during rotation, prompting a check of dimensions.
  • Participants discuss the need for guides on analyzing simulation data, particularly regarding magnetic induction in the stator.

Areas of Agreement / Disagreement

Participants express varying levels of understanding and approaches to the issues raised, with no consensus on the best methods for simulation or analysis. Multiple competing views on how to handle matrix errors and mesh density exist.

Contextual Notes

Limitations include the potential misunderstanding of matrix functionality, the impact of mesh density on simulation accuracy, and unresolved issues regarding the intersection of rotor and stator during rotation.

Who May Find This Useful

Users of Ansoft Maxwell, particularly those involved in motor design simulations, as well as individuals interested in troubleshooting simulation errors and analyzing electromagnetic properties.

  • #91
I have 3 phase 2D Model of Induction machine in Ansys maxwell. For phase-A (one of the three phase)I have 12 coils which I need to connect them in a particular pattern, how I will connect them since there is no option for connecting the coils for a particular winding? I am doing analysis in transient solver.
 
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  • #92
Verify conduction path 'Path1': For any conduction path that has current excitation(s) specified, either exactly one internal current excitation or at least two external current excitations should be specified. Kindly share the solution. Thank you
 
  • #93
Here is the screenshot of error i am having. I know that reason for leakage is coil and excessive region for coil. What can i do to eliminate this current leak? Kindly help regarding this as i am stuck with this for a week. Thank you
 

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  • #94
hsnprvz said:
Here is the screenshot of error i am having. I know that reason for leakage is coil and excessive region for coil. What can i do to eliminate this current leak? Kindly help regarding this as i am stuck with this for a week. Thank you

You're right. The problem is caused by too large "region". Reduce it's size so your excitation would be on the face of "region".
In your case delete the "region", create a new one with option to "pad individual directions". Then input the parameters but remember that in X direction (-X and +X) it should be 0. In Y and Z input percentages you think will create the region big enough to cover all phenomena you'd like to simulate. Alternatively this can be done via components tree - just open the create region command there and input parameters as mentioned above.
 
  • #95
Region is being made according to cylinders i have made. And for coil this region is too big. For my project, i cannot make large coil so i have to stick with this. Is there any other alternative. I just did what you said. Thanks for reply
 
  • #96
You can modify the size of "region" the way I just mentioned. Adjust it's size. Does this fix your problem ?
 
  • #97
Nope, actually when I set region to 25 or 50 or 100.it is adjusted according to cylinders. 0 means attached to cylinders but still big for coil.
 
  • #98
Oh, so the cylinders are not your coil. Okay. So, where's the coil ? cant's see it.
 
  • #99
Coil is in front, it is helical one wounded on ferrite cylinderical core. 3 large cylinders are acting as transmission lines. And region is being made according to large cylinders
 
  • #100
So you need to adjust your geometry, there's no other way.
 
  • #101
Can I give you file? If you can consider once more?
 
  • #102
Nope. Try adding some wires to that coil which would act like a power supply.
 
  • #103
Okay thank you for your kind responses.
 
  • #104
reni90 said:
ok now i have another problem,
Maxwell3DDesign1 (Magnetostatic)
[info] Parametric Analysis on ParametricSetup1 has been started. (1:08:33 jun 01, 2012)
[info] A variation (kut='0deg') has been requested on machine Local Machine (1:08:33 jun 01, 2012)
[error] Could not preserve critical nodes. (1:21:22 jun 01, 2012)
[info] A variation (kut='5deg') has been requested on machine Local Machine (1:21:22 jun 01, 2012)
[error] Could not preserve critical nodes. (1:35:03 jun 01, 2012)
[info] A variation (kut='10deg') has been requested on machine Local Machine (1:35:03 jun 01, 2012)
[error] Parametric Analysis failed - User aborted. (1:45:30 jun 01, 2012)
what does it mean critical nodes?

please, how did you solve this problem?
 

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