An Accurate Iron Loss Analysis Method Based on Finite Element Analysis Considering Dynamic Anomalous Loss

To estimate the iron loss with higher harmonics accurately, the method based on the finite element analysis is proposed. The accuracy of the conventional methods based on the empirical approach deteriorates at the high frequencies and in the case with the minor loops, because they rely on the material measurement that differs from the actual operating conditions. The proposed method can calculate the hysteresis losses with the minor loops accurately using the Play-Hysteron model. It can estimate the “classical” eddy current losses at higher frequencies using the 1D method. Regarding the “anomalous” eddy current loss, “dynamic” anomalous loss factor is introduced in this research. The iron losses due to the minor loops of the lamination steel sheets are measured and compared with the simulation result using the Play-Hysteron model and the 1D method. The iron losses are also measured under the conditions considering the effect of the slot harmonics and PWM carrier harmonics. The proposed method reproduces well the measurement.