Measurement and Modeling of Dynamic Magnetic Hysteresis and Magnetostrictive Strain of Electrical Steel Sheet under Rotational Magnetization

The magnetization process of electrical steel sheet is accompanied by magnetic hysteresis and magnetostrictive strain simultaneously, which becomes more complicated under rotational magnetization. It is significant for the study of loss and vibration of electrical steel core to establish a coupled model of hysteresis and magnetostriction. In this paper, the Jiles-Atherton hysteresis model is improved by considering dynamic losses under the rotational magnetization to express dynamic relation between magnetization M and magnetic flux density B, then the magnetostrictive strain induced by B is modeled by a vector magneto-elastic model. The effectiveness of the proposed model is verified by comparing with the measured data of magnetic properties.