一种特殊形状永磁磁极的计算极弧系数确定  

THE DETERMINATION OF THE EFFECTIVE POLE-ARC COEFFICIENT FOR SPECIALLY-SHAPED PERMANENT MAGNET POLE

作　　者：王兴华[1] 王秀和[1] 陈瑜[1] 李国英 

机构地区：[1]山东大学电力工程学院,济南250061 [2]博山电机厂,淄博255200

出　　处：《山东工业大学学报》2000年第5期477-480,500,共5页

摘　　要：在实际电机中 ,常将永磁磁极削角 .磁极削角后计算极弧系数发生变化 .采用有限元法 ,虽可准确确定电机削角后的计算极弧系数 ,但由于涉及的变量较多 ,难以得到普遍适用的曲线 .为解决这一问题 ,将解析法和有限元法相结合 ,利用有限元法得到确定不削角永磁电机计算极弧系数的普遍适用曲线 ,利用解析法将削角等效为气隙的增大 ,进而确定计算极弧系数 .通过工程实际应用 ,证明所提出的方法是正确有效的 .In Practical machines, the angles of permanent magnet poles are often cut down, which cause the variation of the effective pole-arc coefficient(EPC). Although the EPC of angle-cut permanent pole can be considered by FEM, it is difficult to obtain the generally-used curve due to too many variables involved. The analytical method is combined with FEM to solve this problem. The FEM is used to obtained the generally-used curve for determining the EPC of permanent magnet motors with normal permanent magnet pole, while the analytical method is used to consider the effects of cutting angle. The validity and correctness of this method are proved by application to practical machines.

关 键 词：永磁式电机 永磁体 计算极弧系数 磁极削角 

分 类 号：TM351.033[电气工程—电机]