车用永磁同步电机位置传感器容错系统低速性能研究

Position Sensor Fault-tolerant System Low-speed Performance of Permanent Magnet Synchronous Motor in Vehicle Application

以脉振高频电压信号注入法无位置传感器控制技术为基础,设计了永磁同步电机位置传感器容错控制系统。对高频电流信号和解调信号间存在相位延时的问题进行了分析,指出该相位延时是逆变器延时、定子电阻延时和AD采样延时的共同作用。分析了互感和谐波电感对位置估计误差的影响,提出相应的补偿方法。仿真和实验结果表明,所设计的位置传感器容错控制系统跟踪精度高,具有一定的抗扰动能力,可以很好地进行零速和低速时的速度和位置估计。

Based on fluctuating high frequency voltage signal injection sensorless control method,position sensor fault-tolerant control system for permanent magnet synchronous motor（PMSM） was designed.The phase delay,which existed between high frequency current signal and demodulated signal,was analyzed.The phase delay was caused by the inverter,the stator resistance and AD sampling time.The effect of the mutual inductance and the harmonic inductance on position estimation error were analyzed.And a compensation method was proposed.Simulation and experiment results showed that the position sensor fault-tolerant control system had the advantage of high tracking accuracy and certain disturbance-rejecting ability.It had also a good speed and position estimation performance at zero and low speed.