基于EKF的PMSM位置传感器容错控制算法

Fault-tolerant Control Algorithm of PMSM Position Sensor Based on EKF

在永磁同步电机(PMSM)控制系统正常运行过程中,对于单相低分辨率位置传感器发生故障这一工况,以霍尔位置传感器为例,提出一种新型容错控制算法。通过将扩展卡尔曼滤波器(EKF)引入容错控制算法,并基于转子位置估计误差提出一种加权值函数,将函数值与基于一阶加速度算法的容错控制相结合,实现PMSM在全速度段的高精度容错控制。实验结果表明,新型容错控制算法在单相低分辨率位置传感器故障情况下,具有较好的容错控制效果,提高了车用PMSM控制系统的鲁棒性和可靠性。

In the normal operation process of the permanent magnet synchronous motor(PMSM)control system,for the single-phase low-resolution position sensor failure,taking Hall position sensor as an example,a new type of fault-tolerant control algorithm is proposed.The algorithm introduces extended Kalman filter(EKF)in fault-tolerant control and proposes a weighted value function based on the rotor position estimation error.By combining the function value with the fault-tolerant control based on the first-order acceleration algorithm,the high precision fault-tolerant control of PMSM in all velocity segments is realized.The experimental results show that the new fault-tolerant control algorithm has better fault-tolerant control effect in the case of single-phase low-resolution position sensor fault,and improves the robustness and reliability of vehicle PMSM control system.