Non-Linear Material Model of Ferrite to Calculate Core Losses With Full Frequency and Excitation Scaling

Abstract

A material model for ferrite is presented, enabling an accurate calculation of the core losses from 100 to 1000 kHz with a single set of scalar parameters over a decade of excitation current. It is based on the modeling of different material effects such as quantum tunneling conduction between ferrite grains and atomic-level magnetization. The implications of the satisfying results of this approach on core loss modeling techniques at high frequencies are discussed.