θ0=180°*m/(Pn*f/f0) (provided 2θ0−θr90°)wherein, a frequency of vibration which is to be reduced is represented with f, a pole pair number is represented with Pn, an electrical frequency is represented with f0=Pn*N, a motor revolution is represented with N, m=1, 3, 5, . . . , an angle of the rib with respect to the rotor center is represented with θr, therefore making of motor highly effective and decreasing of the motor acoustic noise are coped with."/>
公开/公告号US7119507B2
专利类型
公开/公告日2006-10-10
原文格式PDF
申请/专利权人 KIYOTAKA NISHIJIMA;
申请/专利号US20050536305
发明设计人 KIYOTAKA NISHIJIMA;
申请日2003-11-28
分类号H02P1/18;
国家 US
入库时间 2022-08-21 21:41:46