基于霍尔传感器故障的PMSM容错控制算法

PMSM fault-tolerant control algorithm based on Hall sensor fault

针对永磁同步电机矢量控制中存在的霍尔传感器故障问题,基于无传感器技术提出一种电机容错控制算法。根据霍尔脉冲序列进行故障与速度检测,采用脉振高频电压注入法与sigmoid新型滑模观测器实现低速、中高速范围容错控制,结合加权函数实现2种无传感器算法的有效过渡,并采用线性电角度补偿方法减少霍尔传感器模式与无传感器模式切换过程的抖振。结果表明,该容错控制算法能在霍尔传感器故障状态下维持电机的稳定运行。

This paper proposes a fault tolerant control algorithm based on sensorless technology to solve the fault problem of Hall sensors in vector control of permanent magnet synchronous motor(PMSM).According to the Hall pulse sequence for fault and speed detection,the pulsating high-frequency voltage injection method and the sigmoid new sliding mode observer are used to achieve fault-tolerant control in low-speed and medium-high speed sections.A weighting function is used to achieve the effective transition of two sensorless algorithms,and a linear electrical angle compensation method is used to reduce chattering during the switching between the Hall sensor mode and sensorless mode.The experimental results show that the fault-tolerant control algorithm ensures a stable operation of the motor when the Hall sensors fail to function.