基于位置误差自动抵消的PMSM无速度传感器控制

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关键词：永磁同步电机;无速度传感器控制;滑模观测器;位置误差补偿;锁相环；低通滤波器DOI：10.15938/j. emc.2025.11.010中图分类号：TM341 文献标志码：A 文章编号：1007-449X（2025）11-0097-12

Speed sensorless control of PMSM based on position-error automatic counteraction

GUO Leilei¹，MA Runzhi1， JIN Nan1， YANG Shuying²，CHEN Zhiwei1 （1.College of Electricand Information Engineering，Zhengzhou Universityof Light Industry，Zhengzhou45o2，China; 2.School of Electrical Engineering and Automation，Hefei Universityof Technology，Hefei 23009，China）

Abstract： Conventional speed sensorless control method for permanent magnet synchronous motors （PMSM） based on sliding mode observer always requires low-pass filter （LPF） to suppress the sliding mode noises.However，the usage of LPF will bring position observation error. So，it is necessary to compensate this error. Nevertheless，the conventional position compensation methods are influenced by the accuracy of estimated speed. To address this problem， a sensorless control strategy for PMSM based on a position-error counteraction phase-locked loop （PECPLL）was proposed. The proposed method automatically compensates the phase delay caused by LPF through connecting another LPF in the feedback loop of phase-locked loop，whose filtering characteristic is the same as the LPF in the sliding mode observer，achieving accurate position estimation of PMSM. The proposed position error compensation method is not only immune to the speed estimation accuracy，but also can beter filter out the high-frequency sliding

mode noise，thus effectively improving the speed and position estimation accuracy of PMSM. In addition， a smal-signal model of the proposed PECPLL was established，the stability analysis was conducted，and the parameter tuning scheme was also provided. Finall，comparative experimental studies were conducted on a 3.7kW surface-mounted PMSM，verifying the effectiveness and superiority of the proposed method.

Keywords：permanent magnet synchronous motor； speed sensorless control； sliding mode observer； posi-tion error compensation;phase-locked loop；low-pass filter

0引言

近年来，相较于异步电机，永磁同步电机（permanentmagnetsynchronousmotor，PMSM）以其高功率密度和高效率等优点在风力发电系统和新能源汽车电驱动系统中得到广泛应用[1-3] O

PMSM常采用转速、电流双闭环矢量控制策略，以实现调速控制。（剩余15015字）