PMSM无传感器控制新型滑模观测器设计  

Design of PMSM Sensorless Control Based on New Sliding Mode Observer

作　　者：王国平 祝龙记[1] WANG Guo-ping;ZHU Long-ji(Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学,电气与信息工程学院,安徽淮南232001

出　　处：《电力电子技术》2021年第4期12-15,共4页Power Electronics

基　　金：国家自然科学基金(U1610120)。

摘　　要：为抑制控制过程中的固有高频抖振,提高滑模观测器(SMO)对转子位置观测的准确性,提出并设计了基于新型趋近率的SMO。新型趋近率将系统状态变量的幂函数与传统趋近率的开关函数部分的增益建立联系,并设计了增益随系统状态进行自适应变化的滑模控制律。新型SMO抑制了系统的固有抖振,减小了电机稳定运行时转子位置估计的误差。根据Lyapunov稳定性判据解决了参数选取问题,保证了系统的稳定运行。仿真和实验结果证实了新型SMO能降低转子位置和转速的估计误差,抑制定子电流及反电动势所含的高频谐波,对突加转矩时的转速波动抑制效果较为明显,具有很好的鲁棒性。In order to suppress the inherent high frequency chattering in the control process and improves the accuracy of the observation of the rotor position by the sliding mode observer(SMO).A SMO based on a new approach rate is proposed and designed.The new approach rate relates the power function of the system state variable to the gain of the switch function part of the traditional approach rate,and a sliding mode control law is designed in which the gain changes adaptively with the system state.The new SMO suppresses the inherent chattering of the system and reduces the error of rotor position estimation when the motor is running stably.According to the Lyapunov stability criterion,the parameter selection problem is solved,and the stable operation of the system is guaranteed.The simulation and experimental results confirm that the new SMO can reduce the estimation error of the rotor position and speed,suppress the high-frequency harmonics contained in the stator current and the back electromotive force,and has a significant effect on the suppression of the speed fluctuation during sudden torque application with good robustness.

关 键 词：永磁同步电机 无传感器 滑模观测器 控制律 

分 类 号：TM341[电气工程—电机]