基于逆系统方法感应电动机调速系统的分析及控制  

Analysis and Control of the Speed Regulation System of Induction Motors

作　　者：王勋先[1] 丁刚[1] 韩曾晋[1] 

机构地区：[1]清华大学

出　　处：《电机与控制学报》1998年第3期162-165,共4页Electric Machines and Control

基　　金：国家教委211工程基金

摘　　要：感应电动机反馈线性化方法的优点之一，是在电机参数准确已知且转子磁通能够准确观测的前提下，可将感应电动机数学模型解耦成互相独立的转速子系统和磁通子系统。其中，磁通能否准确观测是解耦的关键，但转子磁通是不可能准确观测的。为了进一步完善反馈线性化方法，提高调速性能，本文针对感应电动机电流型模型分析了参数及磁通误差对线性化后模型的影响，认识到磁通误差是造成两个子系统重新耦合起来的主要原因，在此基础上给出了使用２－自由度调节器构成的闭环控制系统，仿真及实验证明以上分析是正确的。Induction motors can be decoupled into rotor speed and flux subsystems by the feedback linearising method if the parameters and the rotor flux of the motors can be precisely obtained.Unfortunately,the rotor flux which is important in the method can not be observed precisely until now.In order to improve the method and the control preferment as well,the paper analyzed the effect of the error of the parameters,observed rotor flux to the linear model and came to the conclusion that the error of the observed flux is the main cause making the two subsystems coupled again,and then proposes a closed loop control system based on the 2-degrees of freedom controller.The results of both simulation and experiment show the correction of the conclusions.

关 键 词：非线性控制 逆系统方法 感应电机 调速 

分 类 号：TM346.012[电气工程—电机]