Learning Forum

[seckine21]

Hello everyone,

I am currently working on an IPMSM model in RMxprt + Maxwell 2D for my undergraduate thesis. My goal is to investigate the effect of SVPWM switching frequency on permanent magnet eddy current losses.

I designed an IPMSM in RMxprt using the model wizard and then exported it to Maxwell 2D transient analysis. The model runs and produces current, torque, flux linkage, dq quantities, etc., but I am facing several uncertainties and I would really appreciate guidance from experienced users.

My questions are:

1. I manually entered the motor dimensions and parameters based on a reference document. How can I verify whether my IPMSM dimensions and winding data are physically correct for Maxwell transient analysis?

2. For an IPMSM, is using the RMxprt model wizard a correct approach in the first place? I am wondering whether the problem may originate from the RMxprt template/model selection itself.

3. Could incorrect material assignments be the reason for unrealistic results?

   • I assigned NdFeB magnet material manually.

   • I also added conductivity to the magnet material and enabled Eddy Effects.

4. Are there any ready-made RMxprt IPMSM example/project files available that include correct geometry, winding, materials, and transient setup? I would like to compare my setup against a validated model.

5. My biggest issue is that permanent magnet eddy current loss remains exactly zero even after:

   • enabling Eddy Effects,

   • assigning conductivity to magnets,

   • using transient solution,

   • assigning rotational motion,

   • applying SVPWM harmonic voltage expressions.

Why could PM eddy current loss still remain zero?

Any suggestions or references would be extremely helpful.

Thank you.