基于改进SMO的PMSM无传感器控制  

Sensorless Control of PMSM Based on Improved SMO

作　　者：恩大凯 王贞艳[1] 何延昭 EN Dakai;WANG Zhenyan;HE Yanzhao(School of Electronic and Information Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;Beijing Sunwise Space Technology Ltd,Beijing 100190,China;Beijing Institute of Control Engineering,Beijing 100190,China)

机构地区：[1]太原科技大学电子信息工程学院,太原030024 [2]北京轩宇空间科技有限公司,北京100190 [3]北京控制工程研究所,北京100190

出　　处：《微电机》2024年第1期42-47,共6页Micromotors

基　　金：山西省重点研发计划项目(202102020101013);山西省基础研究计划项目(202103021224271);太原科技大学博士科研启动基金项目(20202070)。

摘　　要：由于传统滑模观测器(SMO)中控制函数采用具有不连续性的符号函数(sign),导致SMO采集到永磁同步电机(PMSM)的反电动势存在严重的高频抖振,进而使得转子位置估计值与转子位置实际值存在较大的偏差。为了提高PMSM无传感器控制精度,提出了一种基于新型控制函数的改进SMO,采用具有连续性的控制函数■(s)作为SMO的控制函数,利用锁相环(PLL)提取转子位置信息,以减小系统抖振,提高转子位置估计精度。同时,根据李雅普诺夫稳定性判据(Lyapunov)对系统的稳定性进行了验证。最后,基于Matlab/Simulink软件的仿真结果表明,提出的改进SMO有效降低了PMSM反电动势的抖振,提高了PMSM无传感控制系统的控制精度。Since the control function of the traditional sliding mode observer(SMO)adopts the sign function with discontinuity.The back electromotive force of permanent magnet synchronous motor(PMSM)collected by SMO has serious high frequency buffeting,there is a large deviation between estimated rotor position and actual rotor position.In order to improve the sensorless control precision of PMSM,an improved SMO based on a new control function was proposed.The function ■(s)was proposed as a control continuous function,the position information of rotor were obtained by the phase-locked loop,the system buffeting was reduced and the accuracy of rotor position estimation was improved.At the same time,the stability of the system was verified by Lyapunov stability criterion.Finally,the simulation results based on Matlab/Simulink software showed that the proposed improved SMO effectively reduced the buffeting of PMSM anti-electromotive force and improved the control accuracy of the senseless control system of PMSM.

关 键 词：永磁同步电机 滑模观测器 锁相环 李雅普诺夫稳定性 

分 类 号：TM351[电气工程—电机] TM341