Analysis of Loss Mechanisms Due to Eddy Currents and Hysteresis in Two-Phase Amorphous Hybrid Soft Magnetic Composites

Abstract

In this study, the effects of the mass ratio between two magnetic phases and particle size on the density, effective permeability, and particularly on eddy current losses and hysteresis losses in hybrid soft magnetic composites (HSMCs). It was found that adding an appropriate amount of powder with specific particle sizes can effectively increase sample density, while the permeability variation in HSMCs shows strong dependence on density. The simulation and calculation model considers the random distribution of particles with different grain sizes and the skin effect was established to separate the contributions of eddy current losses and hysteresis losses of different magnetic phases within the HSMCs. The variation of power losses in HSMCs results from the combined effect of magnetic phase mass ratio, material conductivity, relative permeability, hysteresis properties, and particle size distribution. These results provide insights into fabricating high permeability and low-loss power electronic devices for high-frequency applications.