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Rotating Machinery Coil problem

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Hello

I have a problem with my model. I'm trying to simulate an disk-rotor linear induction motor in 3D (Imported from autocad), seeing as devising a 2D model is out of the question. Instead of Soft Iron without losses, I chose a different material (somaloy), modeling it based on said soft iron, changing the b/h curves.

In stationary, using the magnetic fields physics, everything works more or less okay and I obtain the values of the B-field easily. However, when I try simulating it in the frequency domain, using the same physics package, it never seems to converge.

I then thought it might have something to do with the fact that I would have moving parts (rotor) so I opted for the Rotating machinery package. Seeing as the coils do not have a circular or linear shape, I chose them as numeric. This means that I'd have to use a cylinder (surface) to define the way the currents trasverse the coil. However,whenever I choose form assembly (to define continuities and id-pairs), it's not possible for me to choose the cylinder surface as an indicator for the current orientation.

Does anybody know how I can solve this issue?

Thank you,
Papo

2 Replies Last Post 2016年10月10日 GMT-4 12:25
Nirmal Paudel COMSOL Employee

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Posted: 8 years ago 2016年9月6日 GMT-4 12:23
Hi Bete,

For modeling any kind of rotating machines (motor or generator) we recommend you to first go through these two blog posts and associated examples:
1. www.comsol.com/blogs/how-to-model-rotating-machinery-in-3d/
2. www.comsol.com/blogs/guidelines-for-modeling-rotating-machines-in-3d/

Best Regards,
Nirmal Paudel
Hi Bete, For modeling any kind of rotating machines (motor or generator) we recommend you to first go through these two blog posts and associated examples: 1. https://www.comsol.com/blogs/how-to-model-rotating-machinery-in-3d/ 2. https://www.comsol.com/blogs/guidelines-for-modeling-rotating-machines-in-3d/ Best Regards, Nirmal Paudel

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Posted: 8 years ago 2016年10月10日 GMT-4 12:25
Great post Thanks for sharing.
Great post Thanks for sharing.

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