Behavioral Modeling of Chokes for EMI Simulations in Power Electronics

In this paper, a novel generalized behavioral model and the 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 all types of chokes used in electromagnetic interference filters for power electronics devices. Depending on the level of the model complexity, the model parameters can be obtained either from a straightforward equation-based or an optimization-based parameter extraction procedure. The accuracy of the model and the validity of the method are demonstrated on several examples of single- and three-phase chokes with ferrite and nanocrystalline cores.