Title :
The speed-sensorless control of induction motors at zero frequency
Author :
Huangang, Wang ; Xiaoping, Zhang ; Wenli, Xu ; Geng, Yang
Author_Institution :
Dept. of Autom., Tsinghua Univ., Beijing, China
Abstract :
For most speed sensorless controlled induction motors, even those based on state observers, unstable phenomena occur at very low or zero frequency. In this paper, the potential unstable reason of adaptive rotor flux observer based speed sensorless control is examined and the nonlinear observability of induction motor is analyzed. The limitations of any speed estimation scheme based on observers and effective techniques for sensorless induction motor control at zero frequency are also discussed
Keywords :
control system analysis; control system synthesis; induction motors; machine theory; machine vector control; observability; observers; parameter estimation; rotors; velocity control; adaptive rotor flux observer; control design; control simulation; induction motors; nonlinear observability; speed estimation scheme; unstable phenomena; zero frequency speed-sensorless control; Frequency estimation; Inductance; Induction motors; Observability; Observers; Rotors; Sensorless control; Signal analysis; Stability analysis; Stators;
Conference_Titel :
Electrical Machines and Systems, 2001. ICEMS 2001. Proceedings of the Fifth International Conference on
Conference_Location :
Shenyang
Print_ISBN :
7-5062-5115-9
DOI :
10.1109/ICEMS.2001.971895
