Software fault-tolerant control method of motor and control system thereof

The invention discloses a software fault-tolerant control method of a motor and a control system thereof. The software fault-tolerant control method of the motor comprises the steps of detecting whether a position encoder has a fault; if so, calculating a stator flux linkage of a motor; calculating a rotor flux linkage of the motor according to the stator flux linkage; determining a position estimation value of the rotor according to the rotor flux linkage; calculating a flux linkage deviation through rotation transformation; and according to the flux linkage deviation, adjusting the positionestimation value, and acquiring the position of the rotor and outputting. 本发明公开了一种电机的软件容错控制方法及其控制系统。该电机的软件容错控制方法包括：检测位置编码器是否出现故障；若是，计算电机的定子磁链；根据所述定子磁链，计算所述电机的转子磁链；根据所述转子磁链，确定所述转子的位置估计值；通过旋转变换，计算磁链偏差；根据所述磁链偏差，调整所述位置估计值，获得所述转子的位置并输出。