作　　者： ; ;

机构地区： 湖南工程学院应用技术学院

出　　处： 《湖南工程学院学报（自然科学版）》 2009年第3期6-9,共4页

摘　　要： 直接转矩控制在低速运行时,电机定子电阻的变化影响了系统的低速性能.由于定子电阻的变化随端部绕组温度及其变化率的变化关系具有非线性、时变性等特点,难以建立精确的数学模型.本文介绍一种基于模糊控制理论的定子电阻辨识直接转矩控制交流电机调整系统,该方法结构简单.仿真结果表明,此方法能够精确辨识定子电阻,有效的改善了直接转矩控制系统的低速性能. The change of stator resistance of induction motor the performances of direct torque control system at low speed. It is hard to form an accurate math model, for the change of the resistance value is nonlinear and time-varying according to the terminal winding temperature and the temperature variation. So this paper presents a kind of direct torque control with a stator resistance estimator based on fuzzy logic control for an AC motor speed-governing system. This control method is simple in construction. The simulating result shows that this method can precisely measure the value of resistances and efficiently improve the lowspeed performance of direct torque control system.

关 键 词： 直接转矩 模糊控制 定子电阻辨识 低速性能

领　　域： [电气工程]