表贴式永磁同步电机无位置传感器起动新方法

A Novel Starting Strategy of Sensorless Control for Surface Mounted Permanent Magnet Synchronous Machines

针对表贴式永磁同步电机(surface mounted permanent magnet synchronous machines,SPMSM),该文提出一种脉振高频信号注入法结合载波频率成分法的无位置传感器起动控制新方法。该方法首先向SPMSM的d轴注入脉振高频信号,使得SPMSM呈现"饱和凸极性";然后引入载波频率成分法进行转子磁极极性判断,即提取三相载波正弦脉宽调制(sinusoidal pulse width modulation,SPWM)逆变器中的三相载波频率成分信号,解析其饱和分量幅值的正负,实现对SPMSM转子磁极极性的判别。与传统的通过二次注入其他形式的信号来判断转子磁极的方法相比,该方法有效改善了现有无位置传感器起动方法中存在的算法执行时间长、实施过程复杂等缺点。实验结果表明,所提方法能够准确、快速地检测出SPMSM的初始位置,保证电机顺利平稳起动,具有良好的位置估计精度。

A novel starting strategy of sensorless control for the surface mounted permanent magnet synchronous machines （SPMSM） which combines the high frequency pulsating signal injection method with the carrier frequency component method was proposed. To improve the sensorless starting performance, the carrier frequency component signals ware utilized to detect magnetic pole. Thus, the rotor magnetic pole can be detected without injecting additional signals. Therefore, the novel starting strategy effectively improves the starting performance of sensorless control in the long algorithm execution time, complex process, etc. The experimental results show that the proposed method could quickly and accurately estimate the rotor initial position to ensure the SPMSM starting smooth, which verified the correctness of the strategy.