无速度传感器直接转矩控制系统仿真研究  

Simulation Research of Direct Torque Control System with Speed-sensorless

作　　者：姬宣德[1] 薛亚宾[2] 辛伊波[1] 

机构地区：[1]洛阳理工学院电气工程与自动化系,河南洛阳471023 [2]洛阳理工学院现代教育中心,河南洛阳471023

出　　处：《工矿自动化》2010年第1期39-43,共5页Journal Of Mine Automation

基　　金：河南省教育厅自然科学基金项目(2007510014)

摘　　要：在直接转矩控制系统中,采用传统的纯积分器(U-I模型)作为磁链观测器存在低速时定子磁链难以准确观测的问题,采用速度传感器测量转速存在增加系统的复杂性、降低系统可靠性和鲁棒性并增加系统成本和维护要求的问题。文章提出了利用闭环磁链观测器取代传统的纯积分器来观测定子磁链、依据模型参考自适应理论(MRAS)构造速度观测器来实现速度估计的方法。应用该方法,在Matlab仿真工具中构建了异步电动机无速度传感器直接转矩控制系统的仿真模型,仿真结果证明了该方法的合理性和有效性。In direct torque control system, stator flux can not be accurately observed at low speed if traditional pure integrator （U-I model） is taken as a flux observer, and using speed sensors to measure rotor speed will increase complexity, cost and maintenance requirements and reduce reliability and robustness of the system. In the paper, a method was put forward that traditional pure integrator is replaced by a closed-loop flux observer to observe the stator flux and speed observer is built to estimate rotor speed based on model referenced adaptive system（MRAS）. A simulation model of direct torque control system with speed-sensorless for asynchronous motor was estiblished in Matlab with the method, and the simulation result showed rationality and effectiveness of the method.

关 键 词：异步电动机 直接转矩控制 无速度传感器 磁链观测器 速度估计器 系统仿真 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] TM343[自动化与计算机技术—计算机科学与技术]