Analysis of Magnetization Process of Nanocrystalline Alloy under High-Frequency Trapezoidal Wave Excitation

The investigation of the influence of non-sinusoidal excitation on the magnetization saturation process of nanocrystalline alloys is crucial for the operation of high-frequency transformers under complex working conditions. On the basis of G. Herzer's random anisotropy theory, this paper establishes a three-dimensional model of nanocrystalline alloy and uses the angular velocity of magnetic moment deflection as a parameter to describe the magnetization saturation process. The effects of non-sinusoidal trapezoidal wave excitation magnetic fields with different frequencies and amplitudes on the magnetization saturation process of the material were investigated through micromagnetism simulation. The results indicate that increasing the frequency or amplitude of the trapezoidal wave excitation accelerates the magnetic moment deflection and angular velocity. The angular velocity of magnetic moment deflection is more significantly affected by changes in frequency among them.