Influence of magnet pole shifting on cogging torque for PMSG application

The cogging torque of permanent magnet synchronous generator (PMSG) is a main part of the starting resistance moment(SRM) for wind turbine, it is serious large at the very low wind speed. A novel method of minimizing the cogging torque by shifting permanent magnet pole is proposed based on different slotpole combination for PMSG. Different FEA models are set up to validate the proposed method and are illustrated how to choose the offset angle of permanent magnet pole and discuss its influence on cogging torque value for the wind generator.