Reducing Iron Loss by Decreasing Stress in Stator Core of Permanent Magnet Synchronous Motor

Abstract

It is necessary to develop high efficiency motor, however, it comes a limit to increase efficiency because many motors already have very high efficiency. It is reported that iron loss of motor increase by shrink fit. Therefore, new motor shape is developed from a viewpoint of decreasing stator core stress caused by shrink fit. The relationship with iron loss and stator core stress is examined by the analysis, and the effect of new stator core is verified.