Iron Loss Modeling and Analysis of Grain oriented Silicon Steel Sheet under Multi-harmonic Hybrid Magnetization

Dynamic and static hysteresis properties as well as loss properties of oriented silicon steel sheet under the sinusoidal excitation and multi-harmonic excitation are measured respectively. Then, we simulate the static hysteresis and loss properties by Preisach model. Next, we propose an improved method of excess loss parameter extraction under sinusoidal excitation based on the equivalent relationship between loss separation and magnetic field separation, which is more accurate to predict the dynamic hysteresis properties as well as loss properties than traditional method. Based on above improved method, the field quantity expression corresponding to the excess loss under multi-harmonic excitation was constructed, thus we propose a dynamic hysteresis model of oriented silicon steel sheet under arbitrary complex multi-harmonic excitation. We verified the accuracy and effectiveness of the improved dynamic hysteresis model and the loss prediction algorithm proposed in this paper by comparing the predicted results with the measured ones under all kinds of working conditions.