An Energy-Based Formulation for Dynamic Hysteresis and Extra-Losses

摘要

This paper investigates a new approach to face the problem of dynamic hysteresis and extra-losses in soft magnetic materials. Thanks to a spatial averaging technique and a variational principle, a dedicated formulation is derived. It takes into account microscopic magnetization mechanisms and domain wall motion-induced Joule losses. Implementation within Finite Element Method is discussed and calculations are carried out with the Finite Difference Method for a 2D geometry. The method is shown to be suitable whithin the linear dynamic approximation and far from saturation.