摘要
结合永磁电机极弧宽度组合和永磁体不对称放置的方法提出了一种仅改变隔磁磁桥削弱内置式永磁同步电动机齿槽转矩的方法。通过在永磁体槽和转子外表面之间增加隔磁磁桥,改变磁桥的形状和尺寸,使得内置式永磁同步电动机的一个磁极的极弧宽度变化,同时保持其余磁极宽度不变,且相邻磁极间的宽度相等,通过合理选择隔磁磁桥的形状和宽度,可以非常有效地削弱齿槽转矩。由于每极整数槽和非整数槽时,采用单一极弧宽度变化造成的影响不同,本文采用解析法分别对两种情况进行了研究,得到了磁极的两种极弧宽度和磁极间距大小与齿槽转矩的关系式,据此得到了磁极极弧宽度的确定方法。
A new method is advised to reduce the cogging torque of interior-magnet permanent magnet synchronous motor. Changing the lamination bridges, only the width is changed in this method, and the interval between two adjacent poles is the same. By suitable selecting the shape and width of lamination bridges, the cogging torque can be reduced. The analytical expression of cogging torque of interior-magnet permanent magnet synchronous motor with this method is obtained. Based on the analytical expression, the Fourier expression of the square of residual flux density of PM is found. Then the method to calculate the width of pole arc is advised. At last, the finite element method is used to calculate the cogging torque of one prototype, and the results verify that the cogging torque can be greatly reduced.
出处
《电工技术学报》
EI
CSCD
北大核心
2009年第7期41-45,共5页
Transactions of China Electrotechnical Society
关键词
内置式永磁同步电动机
齿槽转矩
有限元法
磁极宽度
Interior-magnet permanent magnet synchronous motor, cogging torque, finite element method, pole-arc width
