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Time variable fields involving nonlinear materials.
Posted Oct 27, 2014, 1:42 p.m. EDT Low-Frequency Electromagnetics, Modeling Tools & Definitions, Parameters, Variables, & Functions, Studies & Solvers Version 4.4 1 Reply
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I have been searching for time dependent solutions using a multi-turn coil and a nonlinear core. The geometry of the problem is a simple “E” structure and it can be shown in the attached file. I tried to put "100*sin(2*pi*t)" in the current excitacion, for example, on the multi-turn coil, but i didn't get success on the solution (the solution didn't converge in this case). Is it correct in this kind of problem? Or i need to create an electrical circuits physics for the excitacion of the coil?
I saw an example in comsol.com, and they just put "100*sin(2*pi*t)" and got success without the electrical circuits physics. I'm using the Magnectic Fields Physics.
Thanks,
Kevin
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The model that you are trying to solve here is very similar to the transformer model available in the Model Library. The model is available here as well:
www.comsol.com/model/e-core-transformer-using-multi-turn-coil-domains-14123
You would probably need to change the solver to make the non-linear model converge as suggested on this example. Hope this helps !
Best Regards,
Nirmal Paudel
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COMSOL Employee
USA