Predicting Hysteresis and Loss Characteristics of Soft Magnetic Tape Material Considering Skin Effect Under High Frequency Multi-harmonic Magnetization

The nonlinear magnetization characteristic of soft magnetic materials makes it difficult to analyze the distribution of eddy currents and their loss characteristics in soft magnetic tape materials. Therefore, a piecewise linear method is used to approximate the basic magnetization curve. Based on the derivation of Maxwell's equations in each linear segment, the expression of the average magnetic field intensity H_cl corresponding to eddy current loss in soft magnetic tape materials under single-frequency sinusoidal magnetization is obtained, and the corresponding parameter identification method is proposed. Furthermore, based on the consistency principle of field separation technology and loss separation, a high-frequency dynamic hysteresis model in the form of field separation is established. In accordance with the high-order harmonic characteristics in practical applications, a calculation method for the magnetic field intensity H_cl corresponding to eddy current loss under multi-harmonic excitation is constructed based on the approximate linear characteristics of permeability and the superposition principle of field quantity, and a dynamic hysteresis prediction model for soft magnetic tape materials under complex multi-harmonic magnetization is further proposed. The effectiveness and accuracy of the method proposed in this paper are verified by comparing experimental results with simulation results.