Simcenter MAGNET Suite Possible issue in Simcenter MAGNET 2212.0002: Conductor dividing mesh with odd periodic causes issues

2023-12-13T23:43:07.000-0500
MAGNET

Summary

Conductor dividing mesh with odd periodic causes issues. Please upgrade to the latest release of Simcenter MAGNET to avoid this issue altogether.


Details

An odd-periodic 3D model can produce erroneous results if a conductor divides the non-conductor mesh into multiple disjoint regions. This especially concerns "slab" models (2D models solved in 3D). We have examples of this happening with each of the 3D solvers. The figure below shows a thin slab model of a motor whose conducting rotor divides the non-conductor mesh into disjoint inner and outer regions. This is followed by the initial current solution, where an anomalous hot spot appears on the rotor.

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MAGNET should either support this situation, or else check for it and issue an error code explaining the limitation.

Possible workarounds:

  • Double the size of the model to give it even-periodic symmetry;
  • Put a hole through the conductor to connect the disjoint regions;
  • Assign a low conductivity to enough of the non-conductor mesh that it becomes no longer divided. Note that this could slow down convergence.

KB Article ID# KB000128600_EN_US

Contents

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Simcenter MAGNET