Investigation on Behavior Model of PMSMs Considering AC Copper Losses with Cauer Circuit

Conventional behavior models treat the armature impedance as a DC resistance and this approximation highly underestimates the copper loss at higher frequencies. In this paper the impedance is represented by the Cauer circuit to consider the frequency dependency of the impedance and hence to improve the accuracy of loss calculation. A permanent magnet synchronous motor is calculated using the proposed method and the results are compared with FEM results to clarify its usefulness.