Measurement and analysis of magnetic properties of Fe-based amorphous materials under harmonic loading

Amorphous materials exhibit significant potential for applications in energy-efficient distribution transformers and high-speed motors. In these contexts, the iron core typically operates not under ideal sinusoidal excitation, but under harmonic excitation. This paper systematically investigates the effects of order, content and phase angle of the harmonic on the hysteresis loops and loss characteristics of amorphous material based on an established single sheet tester. The findings indicate that core loss increases with the harmonic order and content, while it decreases as the phase angle varies from 0° to 180° relative to the fundamental wave.