基于锁频环前馈的PMSM位置估计误差抑制  

Position Estimation Error Suppression of PMSM Based on Frequency-locked Loop Feedforward

作　　者：张芮嘉 胡勤丰[1] 谷继天 罗云升 ZHANG Rui-jia;HU Qin-feng;GU Ji-tian;LUO Yun-sheng(Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China)

机构地区：[1]南京航空航天大学,自动化学院,江苏南京211106

出　　处：《电力电子技术》2023年第7期40-43,共4页Power Electronics

摘　　要：基于滑模观测器与锁相环(PLL)的永磁同步电机(PMSM)无位置传感器控制系统,其矢量控制性能与转子位置的精度密切相关。针对传统PLL在斜坡加减速过程中存在位置估计稳态误差的问题,提出一种基于锁频环的前馈锁相环(FLL-FPLL)。通过在复系数滤波器的基础上构造锁频环(FLL),实现复系数滤波器中心频率的自适应调节,并将FLL的估计角速度引入PLL,提高位置估计精度。理论分析与实验结果表明:所提出的FLL-FPLL能够有效抑制斜坡加减速过程中的位置估计稳态误差,提高PMSM无位置传感器控制性能。The vector control performance of the permanent magnet synchronous motor(PMSM)sensorless control syst-em based on sliding mode observer and phase-locked loop(PLL)is closely related to the accuracy of rotor position.In order to solve the problem of position estimation steady-state error in traditional PLL during ramp acceleration and deceleration,a feedforward phase-locked loop based on frequency-locked loop(FLL-FPLL)is proposed.By constructing a frequency-locked loop(FLL)based on the complex coefficient filter,the adaptive adjustment of the center frequency of the complex coefficient filter is realized.The estimated angular velocity of FLL is introduced into PLL to improve the accuracy of position estimation.Theoretical analysis and experimental results show that the proposed FLL-FPLL can effectively suppress the position estimation steady-state error during ramp acceleration and deceleration and im-prove the sensorless control performance of PMSM.

关 键 词：永磁同步电机 位置估计误差 锁频环 

分 类 号：TM351[电气工程—电机]