摘要
定子模态分析是研究永磁同步电机(PMSM)电磁振动噪声的重要环节,对定子固有频率进行准确预测是抑制PMSM电磁振动噪声的基础。运用解析法分析了影响定子固有频率的主要因素。建立了定子系统各部分有限元仿真模型,通过有限元仿真和相关数据处理分析研究了绕组、机壳和端盖对定子固有频率的影响。结果表明:当绕组等效弹性模量低于某一临界值时,会使定子固有频率降低,而高于该临界值时,会使定子固有频率升高;机壳和端盖均会使定子的固有频率大幅度提高。
The stator modal analysis was an important segment of studying the electromagnetic vibration and noise of permanent magnet synchronous mortor(PMSM), and the accurate prediction of the natural frequency of stator was the basis of suppressing the electromagnetic vibration and noise. Firstly, the main factors affecting the natural frequency of stator were analyzed by the analytical method. Secondly, the finite element simulation models of each part of the stator system were established, and the influences of the winding, case and end cover on the stator's natural frequency were studied through finite element simulation and related data processing and analysis. The results showed that when the equivalent elastic modulus of the winding was lower than a critical value, the stator's natural frequency would be reduced; while when the equivalent elastic modulus of the winding was higher than this critical value, the stator's natural frequency would be increased. Both the case and the end cover could greatly increase the natural frequency of the stator.
引文
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