受到带通滤波器的影响，永磁同步电机(PMSM)脉振注入法中转子位置估算精度较低。为此，提出了一种基于变论域模糊PI的PMSM无传感控制法。利用变论域模糊的方法对转速环上固定的PI参数进行动态调节，达到减少系统延时、提高转子位置估算精度的目的。仿真的结果表明，变论域模糊PI能够用于转子位置估算，并且比传统PI无传感控制法减少了0.331°平均误差。

Affected by the band-pass filter, the rotor position estimation accuracy in the pulsation injection method of the PMSM is low. For this reason, a method of sensorless control of PMSM based on variable universe fuzzy PI is proposed. The variable universe fuzzy method is used to dynamically adjust the fixed PI parameters on the speed loop. The system delay is reduced and the accuracy of rotor position estimation is improved. The simulation results show that the variable universe fuzzy PI can be used for rotor position estimation, and it reduces the average error of 0.331 degrees than that of the traditional sensorless control method.