摘要：研究表明分数槽集中绕组永磁交流伺服电动机存在一种内在的不平衡磁拉力，本文从工程实际出发，首先对电机静态不平衡磁拉力进行分析，得到静态不平衡磁拉力的相关结果，采用有限元计算方法对结果进行了验证，证明了这种解析方法的适用性，之后对电机负载时的动态不平衡磁拉力进行了分析。
关键词：分数槽集中绕组；不平衡磁拉力；伺服电动机；永磁电机

Abstract:  Research shows that fractional slot concentrated winding permanent magnet AC servo motor exists an inherent unbalanced magnetic pull. Based on the engineering practice, this paper analyzed the motor static unbalanced magnetic pull firstly, got static unbalanced magnetic pull relevant results, then verified the results using the finite element calculation method, proved the analytical method of applicability, finally analyzed the motor load dynamic unbalanced magnetic pull.
Key words:  fractional slot windings；unbalanced magnetic pull；AC servo motor；permanent magnet motor