基于“FEM+单位力波响应”混合模型的IPMSM振动源快速识别方法

Fast Identification Method of IPMSM Vibration Source Based on"FEM+Unit Force Wave Response"Hybrid Model

为了解决电机振动噪声多、物理域耦合计算耗时长等问题,提出了基于“FEM+单位力波响应”混合模型的内置式永磁同步电机(IPMSM)振动源快速识别方法。首先,利用单位力波响应计算电机定子结构关键力波宽频带频响函数特性;然后,通过双闭环矢量控制和电磁有限元控制系统-电磁场联合仿真模型,计算得到电磁力二维傅里叶分解结果,将其作为模态参与因子获得电机振动加速度频谱特性;最后,实验验证了“FEM+单位力波响应”混合模型的准确性。实验结果表明,对于12槽8极IPMSM,恒转矩调速时的振动主要是在4阶和8阶固有频率处,是由4阶力波的14f和8阶力波的fc-3f(其中,f为电机的基频,fc为逆变器的开关频率)分量引起。

In order to solve the time-consuming problem of multi-physical domain coupling calculation of motor vibration noise,this paper proposes a fast identification method of interior permanent magnet synchronous motor(IPMSM)vibration source based on"FEM+unit force wave response"hybrid model.Firstly,the unit force wave response is used to calculate the broadband frequency response function characteristics of the key force wave of the stator structure of the motor.Then the FFT results of the electromagnetic force of the control systemelectromagnetic field joint simulation model are used as the modal participation factor to obtain the vibration spectrum characteristics of the motor.Finally,the accuracy of the"FEM+unit force wave response"hybrid model is verified by experiments.The results show that for the 12-slot 8-pole IPMSM,the vibration of constant torque speed regulation is mainly at the natural frequencies of 4 and 8,which is caused by the fe-3f component of the 14f of 4 and the force wave of 8 in which,f is the fundamental frequency of the motor,f is the switching frequency of the inverter.