Magnetic core losses measurement instrumentations and a dynamic hysteresis loss model

Three typical types of magnetic lamination core loss measurement methods, the toroid tester, the standard Epstein frame and a single sheet tester, are first reviewed. Results of four types of testing (previous three plus a new Epstein frame for high flux density and frequency) are presented and compared. Comparisons among the measurements of different frames show discrepancies in the loss results. A general dynamic hysteresis core loss model is also presented. The model can calculate core losses based on the input parameters obtained from experimental measurements at only one single frequency in a thin lamination. The developed dynamic hysteresis model is simple and efficient, and has been shown to be very accurate compared with experiments.