Title :
An improved nonlinear control strategy for induction motor drive
Author :
Feng, Guung ; Liu, Yanfei
Author_Institution :
Dept. of Electr. & Comput. Eng., Queen´´s Univ., Kingston, Ont., Canada
Abstract :
In this paper, a new configuration called the auto disturbance rejection controller (ADRC) is used in induction motor speed control. The key part of the ADRC is the extended state observer (ESO). By using ESO, the ADRC can estimate accurately the derivative signals and accurate decoupling of the induction motor is also achieved. In addition, the external disturbances and parameter variations could also be estimated and compensated by ADRC, so that the closed loop motor drive system under ADRC control does not depend on the accurate mathematical model of induction motors. Therefore, the robustness and adaptability of the control system is improved too. The simulation and experiment results show that the controller operates quite robustly under modeling uncertainty and external disturbance, and it can provide good dynamic performance such as small overshoot and fast transient time in the speed control
Keywords :
closed loop systems; control system analysis; control system synthesis; induction motor drives; machine control; machine theory; nonlinear control systems; observers; robust control; variable speed drives; velocity control; adaptability; auto disturbance rejection controller; closed loop motor drive system; control design; control simulation; dynamic performance; extended state observer; external disturbances; induction motor drive; motor decoupling; nonlinear speed control strategy improvement; parameter variations; robustness; uncertainty; Control system synthesis; Control systems; Induction motor drives; Induction motors; Mathematical model; Motor drives; Observers; Robust control; Uncertainty; Velocity control;
Conference_Titel :
Electrical and Computer Engineering, 2001. Canadian Conference on
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-6715-4
DOI :
10.1109/CCECE.2001.933630
