A Study of Rotor Configuration for IPMSM with Concentrated Winding Considering the Iron Loss

This paper reports on the IPMSM rotor configuration with concentrated winding stator. The inductance of concentrated winding is higher than the distributed winding and flux density of the concentrated winding contains the higher harmonic components. That generates the higher iron losses than the IPMSM with distributed winding stator. We discuss the three types of interior magnet rotor which has the different saliency ratio. We found that in the lower speed range, the highest saliency rotor is suitable to decrease the load current and copper losses. On the other hand, in the higher speed range, the higher salient rotor generated greater iron losses and decreased the motor efficiency. In the higher speed range, the lower salient rotor is suitable to decrease the iron losses and to increase the motor efficiency.