大型分体式磁轴承电动机系统定子模态分析

发布时间：2019-01-02 18:22

【摘要】：准确分析定子固有模态对低振动噪声电机系统优化设计和控制有十分重要的意义。针对大型分体式磁轴承电动机系统,采用有限元仿真方法分析轴向磁轴承定子绕组、径向磁轴承定子叠片结构、机座螺栓连接以及底座附加质量对大型分体式磁轴承电动机系统定子模态的影响。结果表明:轴向轴承定子绕组对定子固有频率影响较大,宜采用质量计入铁心的方式处理;径向轴承定子叠片结构对定子固有频率的影响较小,可按各向同性处理;机座螺栓连接刚度对机座固有频率有一定影响,但当连接刚度远大于机座刚度时,影响较小;底座附加质量对整机模态频率有一定的影响,但对不同振型的固有频率的影响效果相差较大。计算了整机的模态频率,并与振动试验结果进行了对比验证。
[Abstract]:Accurate analysis of stator inherent modes is very important for optimal design and control of low vibration noise motor system. The finite element simulation method is used to analyze the stator winding of axial magnetic bearing and the laminated structure of radial magnetic bearing stator for the large discrete magnetic bearing motor system. The influence of bolted connection and additional mass of base on stator mode of large discrete magnetic bearing motor system. The results show that the axial bearing stator winding has a great influence on the stator natural frequency, so it is appropriate to take the mass into account of the core, while the radial bearing stator lamination structure has little effect on the stator natural frequency and can be treated as isotropic. The stiffness of bolted connection has a certain influence on the natural frequency of the base, but when the connection stiffness is far greater than the stiffness of the base, the influence is small. The additional mass of the base has a certain influence on the modal frequency of the whole machine, but the effect on the natural frequency of different modes is quite different. The modal frequency of the whole machine is calculated and compared with the results of vibration test.
【作者单位】：海军工程大学舰船综合电力技术国防科技重点实验室;
【基金】：国家重点基础研究发展计划(973项目,2013CB035601) 国家自然科学基金(51137005,51222705)资助项目
【分类号】：TH133.3

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