永磁同步电机转子位置辨识研究

Study on Rotor Position Identification of Permanent Magnet Synchronous Motor

传统脉振高频电压信号注入法在估计永磁同步电机(Permanent Magnet Synchronous Motor,简称PMSM)转子位置时,因无法辨识转子N/S极而存在位置估算可能相反的问题。利用电机磁场的饱和效应,提出了一种新型转子位置辨识方法,通过分析包含转子位置误差信息的二次高频电流分量,对转子永磁体磁极极性进行判别,结合传统方法,准确辨识出转子位置。对一台凸极式PMSM进行了转子位置估计实验,验证了该方法的有效性。

The estimation result of the rotor position for permanent magnet synchronous motor（PMSM） maybe reverse with traditional pulsing high-frequency voltage signal injection method,since this method cannot recognize N/S rotor polarity.A new method is proposed to identify rotor position based on motor saturation effect.N/S polarity is distinguished by analyzing the second high-frequency current component with rotor position error information,and then rotor position can be easily obtained.The experiment is implemented on a PMSM with salient pole.The experimental results verify the proposed approach,and it achieves the valid rotor position polarity identification.