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.
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.