Measurement and Modeling of 3-D Rotating Anomalous Loss Considering Harmonics and Skin Effect of Soft Magnetic Materials

Abstract

By using a 3-D magnetic properties testing system, 3-D rotating core losses considering harmonics and skin effect of the bulk soft magnetic composites are measured and modeled. On the basis of the rotating core losses calculation approach, the transformed coefficients and parameters of rotating losses are determined. Then, a variable loss coefficient model and indirect orthogonal decomposition calculation model of the rotating anomalous loss are thus built in this paper. Meanwhile, a separation of the total 3-D rotating experimental core losses is worked out. In addition, measurement and separation of the total experimental core losses for typical electrical steel sheets are carried out under 3-D rotating and alternating excitations, respectively. The three different methods are analyzed and compared qualitatively. Be noted that the two novel calculation models can be more effectively presented the anomalous loss features. Moreover, the quantitative comparisons between 3-D rotating and alternating core losses have also achieved some beneficial conclusions.