Investigation on core loss according to stator shape in interior permanent magnet synchronous motor

This paper deals with the core loss reduction according to the change of stator shape in an interior permanent magnet synchronous motor (IPMSM). The number of slots per pole per phase of the IPMSM is 0.5, and the tooth width and yoke thickness are chosen as design factors. According to the ratio of tooth width and yoke thickness, the core loss is analyzed under considering the rotating and alternating magnetic field at the main operation. Base on the functional core loss data obtained by the Steinmetz equation, the core loss is calculated by using finite element method (FEM). In this study, the determination of ratio of tooth width and yoke thickness to minimize the core loss in the IPMSM is presented. In additional, the torque characteristics according to the ratio are also investigated.