感应电机直接转矩控制系统的新型滑模定子磁链观测器  

Novel Stator Flux Sliding-mode Observer for Direct Torque Controlled Induction Motor Driving Systems

作　　者：张兴华[1] 石万[1] 李磊 

机构地区：[1]南京工业大学自动化与电气工程学院,江苏南京211816 [2]泰州市华源电机有限公司,江苏泰州225500

出　　处：《电气传动》2014年第10期3-6,共4页Electric Drive

基　　金：国家自然科学基金资助项目(60974009)

摘　　要：为提高定子磁链的估计精度,改善直接转矩控制驱动系统的性能,提出了一种新型定子磁链滑模观测器。采用Lyapunov稳定性理论证明了观测器是稳定的。该观测器的实现无需电压信息,对电机参数变化具有强鲁棒性,即使在电机低速运行区依然能够提供精确的磁链估计值。仿真结果验证了基于该观测器的感应电机直接转矩控制系统具有优良性能。In order to increase the accuracy of the stator flux estimation and improve the performance of the directtorque controlled induction motor driving systems,a novel sliding-mode stator flux observer was proposed.The stabilityof observer was proved by Lyapunov theory.The implementation of the observer needs not any information of the statorvoltage.And the estimated value of the stator flux is insensitive to stator resistance variation.The observer works well inall speed range,even at very low speed.Simulation results show that the direct torque controlled induction motordriving system based on the proposed observer possesses the excellent control performance.

关 键 词：感应电机 滑模观测器 定子磁链估计 直接转矩控制 

分 类 号：TM921[电气工程—电力电子与电力传动]