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Setting boundary condition for transient modulation of a sector of electrical machine

Posted Dec 27, 2011, 4:25 p.m. EST Low-Frequency Electromagnetics Version 4.2a 2 Replies

Arijit Banerjee
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Hi all,

I was able to solve a sector of electric machine in static condition. (Full machine is 8 pole I want to solve it for 2 pole) However in transient simulation ( I mean moving rotor). The field i am seeing does not make sense and I am sure I am making a mistake in setting up the boundary conditions properly. If you can help.

The bounday conditions I have:
1. Sector symmetry (between the edge boundaries)
2. Continuity in the boundary (using identity pair, between the contacts of stator and rotor)

I am using rotating machinery magnetic module. I was looking into a book Multiphysics Modeling Using COMSOL: A First Principles Approach by Roger W. Pryor. However I could not find a solution from the worked out example, 2D AC Generator: Sector—Static and Transient but I guess that one was for older version and its very difficult for me to fit all the steps in 4.2a.

Do I need to give any additional point boundary condition? I have kept Identity pairs referance frame as spatial (both source and destination)

Thanks for your help. I have attached a video of the field distribution.

Arijit

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2 Replies Last Post May 28, 2013, 3:42 p.m. EDT
COMSOL Moderator

Hello Arijit Banerjee

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Jens Krause
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Posted: 1 decade ago Mar 29, 2012, 8:07 a.m. EDT
Hi Arijit,

did you get a reply on this? I only read your message right know.

For the interface between rotor and stator you must use "Sector Symmetry"
and not "Continiuty"


Regards

Jens
Hi Arijit, did you get a reply on this? I only read your message right know. For the interface between rotor and stator you must use "Sector Symmetry" and not "Continiuty" Regards Jens
Xuezhou Wang
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Posted: 1 decade ago May 28, 2013, 3:42 p.m. EDT
Hello Jens,

I guess you are right. But how about the condition on the edge of the sectional machine?

Best regards,
Xuezhou
Hello Jens, I guess you are right. But how about the condition on the edge of the sectional machine? Best regards, Xuezhou

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