脉振高频电压注入PMSM凸极特性实验检测研究

Experimental research of PMSM salient characteristic using pulsating high-frequency voltage injection

针对传统方法在研究永磁同步电机不同工作点下的凸极特性及分析其受交叉饱和效应影响的程度时通常采用耗时巨大的有限元仿真分析或复杂繁琐的实验方法的问题,提出了一种较为简便的永磁同步电机凸极特性实验检测方法。依据旋转坐标变换理论,通过向转子锁死的永磁同步电机注入脉振高频电压信号,解调高频响应电流信号,可以快速测得不同工作点下电机的凸极特性。通过对一台内置式永磁同步电机的实验研究验证了该方法的可行性,实验结果表明该方法能够准确检测不同工作状态下电机的凸极特性并分析由交叉饱和效应造成的交叉饱和角的大小。

The salient characteristic of permanent magnet synchronous motor and the impact of cross-satu-ration effect under different operating states are usually attained by time-consuming finite element analysis or complex experiment. A simple experimental method was proposed to detect salient characteristic of permanent magnet synchronous motor. A pulsating high-frequency voltage signal was injected into a rotor-locked motor, and the salient characteristic was obtained by demodulating the high-frequency current re-sponse with rotating coordinate transformation. An experiment on an interior permanent magnet synchro-nous motor was carried out to verify the proposed method, and the experimental results show that this method can detect the salient characteristic of the motor under different working states accurately and ana-lyze the cross-saturation angle caused by cross-saturation effect.