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Modelling a permanent magnet with multiple poles

Posted 29 nov. 2017, 09:53 UTC−5 Low-Frequency Electromagnetics Version 5.3 3 Replies

Lukas Leuenberger
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Hello,

I am currently trying to model a permanent magnet which has multiple poles. In the image an example is shown.

How do I need to model this?

I was able to model a magnet with only two poles. For this I took a zylindrical geometry and megnatized it. My attempt for multiple poles was, that I cut the zylindrical sphere into multiple parts and magnetized these separate parts. Unfortunatly this resulted in the same as if I had not cut it. Attached is my attempt.

Thanks in advance for all tipps.

3 Replies Last Post 6 déc. 2017, 16:34 UTC−5
Sergei Yushanov Certified Consultant
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Posted: 7 years ago 29 nov. 2017, 12:33 UTC−5

Lukas,

Attached is model with multiple poles.

Regards, Sergei

Lukas, Attached is model with multiple poles. Regards, Sergei
Lukas Leuenberger
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Posted: 7 years ago 30 nov. 2017, 09:48 UTC−5

Hi Sergei,

Thank you very much for your model. I was able to repeat the steps which you did. I did not had the idea to change the sign of the magentization for some of the slices.

However the poles are arranged in kind a special way. I tried to visualize in the attached image what kind of arrangement I'd like to achieve. Do you have any ideas how this can be achieved?

Hi Sergei, Thank you very much for your model. I was able to repeat the steps which you did. I did not had the idea to change the sign of the magentization for some of the slices. However the poles are arranged in kind a special way. I tried to visualize in the attached image what kind of arrangement I'd like to achieve. Do you have any ideas how this can be achieved?

Attachments:

Lukas Leuenberger
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Posted: 7 years ago 6 déc. 2017, 16:34 UTC−5

I was able to achieve the desired simulation. There were different problems in the design. First, the direction of the magnetization was wrong. Also I had to make the block of air around the magnet bigger. Also some other small changes had to be made.

I was able to achieve the desired simulation. There were different problems in the design. First, the direction of the magnetization was wrong. Also I had to make the block of air around the magnet bigger. Also some other small changes had to be made.

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