A Study on the Improvement of Torque Characteristics of D.C Brushless Motor by Auxiliary Slot Method

보조 슬롯법에 의한 D.C Brushless Motor의 토오크특성 개선에 관한 연구

In all sorts of primary factor which produce torque ripple of d.c brushless motor cogging torque which is generated from relation between permanent magnet rotor and salient pole cannot controled by external control system. So in this paper cogging torque is analysed by simple method in which slot fuctuion is introduced. And for reducing counterplan of cogging torque d.c brushless motor which plot auxiliary slot by inequality interval is proposed. Thus the quantitative torque characteristics of new motor which designed by this method is analysed by F.E.M and validity of this new design is proved.