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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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Force between a permanent magnet and magnetic field

Posted 2016年9月15日 GMT-4 04:53 Low-Frequency Electromagnetics, Geometry, Modeling Tools & Definitions, Parameters, Variables, & Functions Version 4.4 2 Replies

Shereen Saju
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I want to calculate the force between a permanent magnetic material and a magnetic field created by electromagnet. Can anyone help me with the required steps in COMSOL 4.4? Kindly do the needful. Thanks in advance.
2 Replies Last Post 2016年9月20日 GMT-4 01:00
Mark Harradine
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Posted: 8 years ago 2016年9月19日 GMT-4 11:07
I have attached a very simple (axisymmetric, stationary) coil and permanent magnet model as a starting point. Note that it is a version 5.2a file, so not sure if you will be able to open it, but that's the only version I have.

Basically, to calculate the force, you will need to define a Force Calculation node in the "mf" interface., and select the domain for which you want to calculate the force. Give the force a name so that you can use it as a variable within your model.
Things get a little more complex if you have non-linear steels in your model, and/or time varying fields or moving meshes.

Hopefully the attached gives you a starting point.
I have attached a very simple (axisymmetric, stationary) coil and permanent magnet model as a starting point. Note that it is a version 5.2a file, so not sure if you will be able to open it, but that's the only version I have. Basically, to calculate the force, you will need to define a Force Calculation node in the "mf" interface., and select the domain for which you want to calculate the force. Give the force a name so that you can use it as a variable within your model. Things get a little more complex if you have non-linear steels in your model, and/or time varying fields or moving meshes. Hopefully the attached gives you a starting point.

Attachments:

Shereen Saju
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Posted: 8 years ago 2016年9月20日 GMT-4 01:00
I couldn't open the file. I was able to find the force between two permanent magnets which would be similar to a stationary field and permanent magnet that you mentioned here. But I need to find the force between the permanent magnet and time varying magnetic field. If you could give the steps for that it would be very useful for me. Anyways Thanks for your reply.
I couldn't open the file. I was able to find the force between two permanent magnets which would be similar to a stationary field and permanent magnet that you mentioned here. But I need to find the force between the permanent magnet and time varying magnetic field. If you could give the steps for that it would be very useful for me. Anyways Thanks for your reply.

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