外转子永磁高速电机转子振动特性分析

Vibration Characteristics Analysis Rotor of Outer Rotor Permanent Magnet High-Speed Motors

在外转子高速永磁电机转子设计中,为了提升电机转子高速旋转的稳定性,避免转子高速引起振动和发生扫膛,通过NX软件建立了转子几何模型,导入有限元分析软件进行自由模态分析,获得了电机转子的固有频率与振型图;并进行试验模态分析实测,与前者数据作比较,结果吻合,验证了动力学模型的正确性。通过施加轴承约束求解模态,估算了转子结构的合理转速。

In order to improve the rotating stability of motor rotor, avoid vibration and the rotor touch stator caused by high rotation of the rotor on the design of rotor in Outer rotor permanent magnet high-speed motor, professional dynamic finite element analysis software was used to solved simulation mode followed by the geometric model of the rotor established by NX software. The natural frequencies and mode shapes map of motor rotor were obtained, and it is found that numerical simulation is consistent with those datum that measured by modal analysis testing. The dynamic model was validated. By imposing bearing constraint to solve the model, the reasonable speed of rotor structure was estimated.