利用低频电流注入激发的转矩偏差信号补偿表贴式永磁同步电机无传感器驱动的位置误差

The second-order linear position observer of surface mounted permanent magnet synchronous motor (SPMSM) suffers from parameter variations, control delay, etc. Focusing on these problems, this article proposes the low-frequency current injection method for compensation of position error. It is proved that although the absolute error of torque calculation of one work point changes irregularly with t...