Eddy current losses model and physical parameters evaluation for ferrite magnetic cores in frequency domain

Accurate modeling of losses in ferrite cores is of high interest for power electronics design. Left aside the problem of modeling the constitutive law, accurate computation of losses require to model the 3d geometry, for instance by Finite Element (FE) analysis, which is computationally expensive. This hinders the practical usage of such models in circuit simulators which require "light"models. In this work we devise a new approximate method to take into account the microscopic structure of toroidal ferrite cores, which boils up into simple analytical formulas. The proposed method is compared to experimental measurements on a T38 ferrite core, and a FE model.