Behavioral circuit modeling of single- and three-phase chokes for EMI simulations

In this paper, a new SPICE-compatible behavioral model and corresponding parameter extraction procedure for single- and three-phase chokes 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 straightforward parameter extraction procedure based on three set of measurements. The technique has been validated on several different chokes. Using this procedure, reliable models in the EMI conducted emission frequency range have been obtained.