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error in impedance calculation of multi-turn domain

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Hello,

I would like to calculate the impedance of a coil in a 3d model. For that I solve the problem in the frequency domain for several relatively low frequencies. I therefore can neglect the skin effect in the wires of the coil. I noticed that the real part of the impedance is higher than what you would expect. Investigating further where this error does come from I noticed that the imaginary part of the magnetic field has very high values. These then result in very high values in the electric field within the coil domain generating a high real part of the induced voltage in the coil. The problem is solved when I set the conductivity in the coil domain to the proper value for copper. However, doing so will of course decrease the calculated impedance of the coil.

Is there a solution to this problem?

I attached a simple model of a coil in air to demonstrate the problem.


0 Replies Last Post 5 sept. 2013, 05:23 UTC−4
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Hello Michael Kirschneck

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