基于MRAS无速度传感器矢量控制系统研究  

Study of Speed Sensorless Vector Control System Based on MRAS

作　　者：江巧逢[1] 

机构地区：[1]西南交通大学电气工程学院

出　　处：《变频器世界》2011年第6期79-81,108,共4页The World of Inverters

摘　　要：根据异步电动机矢量控制基本原理,构建了基于转子磁链定向的模型参考自适应系统,并针对其基准模型易受积分初值和漂移问题的影响,提出了一种改进的速度辨识方法。该方法由改进的电压参考模型和电流可调模型构成。利用Matlab/Simulink对系统进行了仿真,仿真结果表明该系统能较好地估计电机的磁链及转速,收敛速度快,具有良好的稳态辨识特性。The model reference adaptive system,which is rotor current flux oriented,is established according to the principle of vector control system for asynchronous motor.A new model was proposed to identify the rotor speed of induction motor because of the normal model can always be affected by the initial value and drift of integral calculation in the conventional speed identifier.The model is composed of an advanced rotor flux voltage reference model and rotor flux current adjustable model.This approach was implemented on Matlab/Simulink software.The simulation results show that the system can estimate the flux and speed with good accuracy,and has a better steady identifiable characteristic.

关 键 词：异步电动机 无速度传感器 模型参考自适应系统 

分 类 号：TM921[电气工程—电力电子与电力传动]