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DC resistance of a coil
Posted Dec 4, 2009, 5:34 AM EST 5 Replies
I would like to calculate the DC resistance of a coil. I'm using an axisymmetric model. The coil has a few hundred turns in reality but I'm modelling it as a homogenous single coil. I know that the cross-section fill factor is approximately 55%. Because the different turns have different radius (the turns are stacked on top of each other) I can't excite the coil using constant voltage (Vloop), instead I must use a constant current density. I thought that I could integrate the E-field in the coil to obtain the average voltage drop and multiply this with the number of turns to get the voltage. And calculate the resistance from ohm's law, but I am not able to calculate the voltage this way. Is this a feasible approach, or am I missing something? (There is also a permanent magnet, magnetized in the z-direction included in the model)