基于磁固耦合的分数槽永磁同步电动机振动分析

Investigation on Coupled Magnetical and Solid Vibration of Permanent Magnet Synchronous Motor with Fractional Slot Winding

以小型分数槽永磁电机为研究对象,通过分析其电磁振动理论,从多方面对电机结构进行了优化。把计算出的电磁力离散成点并加载到电机定子上,在ANSYS中做了瞬态动力学分析,最终得到电机定子对动载荷的时域响应。但瞬态动力学分析只能近似获得电机某点的时域响应,并不能得到整个电机精确的动力学特性曲线。而采用磁固耦合联合仿真可将计算出的电磁力自动耦合到定子齿做频谱分析,从而得到电机整体的频谱特性。结果表明采用磁固耦合的方法更能精确的反映电机振动的频谱特性,从而指导电机结构设计以及优化。

The structure of small fraction slot permanent magnet motor was optimized in many ways by analyzing thetheory of electromagnetic vibration. The calculated electromagnetic force was discretized into points and loaded onto the stator.Eventually the real-time response of stator to dynamic load was obtained by doing transient dynamic analysis in ANSYS.But transient dynamic analysis can only obtain the real-time response of the motor on a certain point instead of thewhole motor. However, the calculated electromagnetic force can be automatically coupled to the stator tooth to do spectralby using the magnetic solid coupling joint simulation, thus the spectrum characteristics of the whole motor can be obtained.The simulation results show that using magnetic solid coupling method is more accurate to reflect the spectrum responsecharacteristics of the motor and can be used to guide the design and optimization of the motor structure.