A study of rotor configuration for IPMSM with concentrated winding considering the iron loss

This paper reports an IPMSM rotor configuration with a concentrated-winding stator. The inductance of the concentrated winding is greater than that of the distributed winding and the flux density of the concentrated winding contains higher harmonic components. The result is higher winding losses than in the IPMSM with a distributed-winding stator. We discuss three types of interior magnetic rotor with different saliency ratios. In the lower speed range, the highest-saliency rotor is effective in decreasing the load current and copper losses. On the other hand, in the higher speed range, the higher-saliency rotors result in greater iron losses and lower motor efficiency; in this range, the lower-saliency rotor is effective in decreasing iron losses and increasing motor efficiency. © 2002 Wiley Periodicals, Inc. Electr Eng Jpn, 139(4): 71–78, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10005