Behavioral circuit modeling of chokes with multi-resonances using genetic algorithm

In this paper, a novel multi-resonance SPICE-compatible behavioral model of chokes and corresponding parameter extraction procedure are presented. The model takes into account common-mode and differential-mode behavior of the choke and can be applied to modeling both common-mode chokes and coupled DC chokes. The model parameters are obtained from a parameter extraction procedure based on genetic algorithm. The accuracy of the model and the validity of the method are demonstrated. Using this procedure, reliable models in the EMI conducted emission frequency range have been obtained.