关键词: 永磁同步电机, 线性扩张状态观测器, 无位置传感器控制, 锁相环

Abstract: In order to realize the sensorless control of the high-speed section of the PMSM, the linear extended state observer was used to estimate the motor back emf, and the phase-locked loop was combined to estimate the motor speed and rotor position. Based on the frequency domain method, the transfer functions of LESO and PLL were derived, and the parameter setting method of LESO and the calculation formula of phase lag compensation angle were obtained. The design process of the control strategy had theoretical value and engineering practical significance. Simulation and experiments show that the control strategy can accurately estimate the motor speed and position and realize sensorless speed control.

Key words: permanent magnet synchronous motor (PMSM), linear extended state observer(LESO), position sensorless control, phase locked loop(PLL)