Design of Slot Wedge Shape for Reducing Cogging Torque in Outer Rotor Type Permanent Magnet Synchronous Generator with Open Slot Structure

개방형 슬롯 구조를 갖는 외전형 영구자석 동기발전기의 코깅 토크 저감을 위한 슬롯 ��지 형상 설계

This paper suggests the slot wedge shape for reducing the cogging torque of a gearless type direct-drive permanent magnet synchronous generator with open slot shape. To achieve this, we are designed the appropriate specifications of the permanent magnet synchronous generator by selected the appropriate material of slot wedge and various slot wedge shapes. The PMSG models were analyzed by finite element method. Finally, we have suggested appropriate material of slot wedges and its shape which has benefit to further reducing cogging torque and preventing decreasing of the generating power.