基于滑模观测器的异步电机无速度传感器控制  

Speed-sensorless Control of Induction Motor Based on Sliding Mode Observer

作　　者：李卓[1] 卢子广[1] LI Zhuo;LU Ziguang(School of Electrical Engineering,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学电气工程学院,广西南宁530004

出　　处：《电气传动》2016年第7期12-15,共4页Electric Drive

基　　金：国家自然科学基金(51177018)

摘　　要：将滑模理论应用于异步电动机状态观测器中,提出了一种基于滑模观测器的异步电动机无速度传感器控制策略。所提滑模观测器以定子电流和转子磁链为状态变量,利用定子电流观测值和实际电流的误差特性,对转子磁链进行估算,同时基于李雅普诺夫理论导出转速的自适应律。最后对所提方法进行实验验证,结果表明所提观测器具有较好的观测精度,且电机系统能实现正反转,具有较大的调速范围。Presented a speed-sensorless control strategy of induction motor based on sliding-mode observer. Byusing the rotor flux and the stator current as the state variables,the proposed sliding-mode observer could be used toestimate the rotor flux by utilizing the error between the estimation value and the actual value of the stator current,atthe same time,adaptive law of the speed could be derived based on the theory of Lyapunov. Finally,experiments werecarried out to validate the proposed method,and the results show that the proposed sliding-mode observer has goodaccuracy,and the motor system with large speed range can realize the motor positive inversion.

关 键 词：异步电动机 无速度传感器 滑模观测器 

分 类 号：TM346[电气工程—电机]