Why is the Lorentz force calculated in Ansys Maxwell so low?

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SUMMARY

The Lorentz force calculated in Ansys Maxwell appears significantly lower than expected, with results around 10-4 N instead of the anticipated 0.1 N based on the formula F=B*I*l. The discussion highlights a simple model involving a magnetically conductive plate in a static magnetic field, where a 10 A electric current runs perpendicular to the magnetic field of approximately 10 mT. Users have tested both 3D and 2D models, yielding similar low results, indicating a potential issue in the simulation setup or parameters used.

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  • Understanding of Lorentz force calculations
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  • Knowledge of magnetic fields and their properties
  • Experience with modeling in 3D and 2D environments
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Electrical engineers, simulation specialists, and researchers working with electromagnetic fields and Ansys Maxwell software who are troubleshooting force calculations in their models.

densaface
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Why is the Lorentz force calculated in Ansys so low? According to the formula F=B*I*l, it is supposed to be at least 1000 times higher. The model is really simple: a magnetically conductive plate in a static magnetic field inducts the magnetic field from the surrounding space, which makes its own magnetic field dozens of times stronger than in the surrounding vacuum (which is perfectly logical) - around 10 mT. A 10 A electric current runs perpendicular to this magnetic field in the plate. According to the formula, F=B*I*l=10-2*10*1=0.1 N, but the program produces results in the range of 10-4 N for the Lorentz force. I have tried both 3D and 2D models and the result is nearly identical. What am I missing?

p.s. I can attach my project file if it helps
 
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just in case the project archive
 

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Hello, did you find the answer to this? I have the same problem...
Regards
Mario
 

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