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electrical circuit conditions
Posted 3 mai 2012, 06:18 UTC−4 2 Replies
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i'm tring to studing the current distribution and juole losses in an indutor. I work with ac voltage sourge of 1000V with a frequency of 20kHz. i use an impedence boundary condition because my skin dept is so small. In my model i work with a lumped port connected with an electrical circuit. In the electrical circuit i define an voltage sorce and then an external I vs U (linked with my fem model). The model doesn't work and i get the the following error:"System matrix is zero".
Can someone help me?
Thanks
Nicola
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Hello Nicola Gagliardi
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regarding the lumped port connected to the electrical circuit, I have the same problem,
i was wondering if you could inform me how to solve the problem, in case of finding a solution?
Sincerely
Behrooz
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under the Stationary Solver node you have to specify Fully Coupled instead of Seggregated and you have to run a Direct solver instead of the Iterative. Then it solves without an error.
I should add that this is true in version 4.3b, in 4.2a you have to test it, I don't have it installed any more.
Cheers
Edgar
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Edgar J. Kaiser
emPhys Physical Technology