基于改进Super-Twisting滑模观测器的永磁同步电机无传感器控制  

Sensorless Control of Permanent Magnet Synchronous Motor Based on Improved Super-Twisting Sliding Mode Observer

作　　者：王涛[1] 黄景春[1] 周行之 金靖 WANG Tao;HUANG Jingchun;ZHOU Xingzhi;JIN Jing(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学电气工程学院,四川成都610031

出　　处：《西南交通大学学报》2025年第2期445-453,共9页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金项目(U21A20169);四川省自然科学基金项目(2022NSFSC0451)。

摘　　要：在无传感器控制宽调速范围内,传统super-twisting二阶滑模观测器算法在永磁同步电机中存在转子位置估计误差随速度变化而发生抖动的问题.为减小转子位置估计误差并提升电机调速控制性能,本文基于双曲函数提出一种改进的滑模观测器,并设计定子电阻的在线辨识方案,同时开发扰动电压观测器以在线估计逆变器非线性引起的失真电压;最后,通过电机硬件在环实验测试进行验证.测试结果表明:位置估计误差减小7.6%,速度估计精度提高5.8%.In the wide speed range of sensorless control,the traditional super-twisting second-order sliding mode observer algorithm had a problem that the error of rotor position estimation would change with the speed in the permanent magnet synchronous motor(PMSM).In order to improve the control performance of the motor speed and reduce the error of rotor position estimation,an improved sliding mode observer based on hyperbolic function was proposed,and an online identification scheme of stator resistance was designed.A disturbance voltage observer was designed to estimate the distortion voltage caused by the nonlinearity of the inverter on line.Finally,the hardware-in-the-loop test was carried out to verify the feasibility of the scheme.The test results show that the error of position estimation can be reduced by 7.6%,and the accuracy of velocity estimation can be increased by 5.8%.

关 键 词：永磁同步电机 无传感器控制 改进super-twisting算法 定子电阻在线辨识 逆变器非线性补偿 

分 类 号：TM341[电气工程—电机]