An Enhanced Electrical Steel Sheet Model Integrating the Effects of Rotating Magnetic Properties and DC-Biased Field

This paper enhances the Enokizono and Soda (E&S) two dimensional rotating magnetic properties model by integrating the impact of DC-biased field in the E&S model. An experimental set up is developed to apply the DC voltage excitation superimposed on a constant AC excitation, and to investigate their collective impact on the testing sample of electrical steel sheet. The magnetic properties B and H of the testing sample are measured under the influence of rotating and DC-biased magnetic fields. Based on the measurement results of B and H, the E&S model is enhanced by adding rotating reluctivity coefficient (upsilon(rk)), rotating hysteresis coefficient (upsilon(hk)), and DC reluctivity coefficient (v(ok)) to integrate the effect of DC-biased field with rotating magnetic field. Rotating and DC reluctivity coefficients in conjunction with rotating hysteresis coefficient are obtained by Fourier series expansion of experimental B and H waveforms. The accuracy of an enhanced model under DC-biased field is proved by the close agreement between experimental hysteresis loops of electrical steel sheet and the ones obtained by the proposed model.