Abstract: In order to accurately predict the modal characteristics and natural frequencies of the stator system of the motor, in this paper, an equivalent method of permanent magnet synchronous motor stator system model is proposed and its modal analysis is carried out. Firstly, the stator core and winding model are established by finite element methods, and an anisotropic material attribute is set. Then, the naturalt frequency of the stator core and the windings is obtained by simulation, and modal analysis is performed. Finally, the accuracy of the equivalent method of the stator system model is verified using hammer method modal test. This article provides a new equivalent analysis method for the modal analysis of the motor stator system, and improves the calculation accuracy.

Key words: Permanent magnet synchronous motor; Stator sysiem model; Model equivalent method; Modal test; Modal analysis

摘要： 为了准确地预测电机定子系统的模态特性和各阶固有频率，文章提出了一种永磁同步 电机定子系统模型等效方法并进行模态分析。首先，利用有限元方法建立定子铁心及绕组模 型，设置各向异性材料属性；然后，通过仿真计算得到定子铁心及绕组的固有频率，并进行 模态分析。最后，利用锤击法模态试验验证定子系统模型等效方法的准确性。文章为电机定 子系统的模态分析提供了新的等效分析方法，提高了计算精度。

关键词: 永磁同步电机；定子系统模型；模型等效方法；模态测试；模态分析