Title :
An adaptive rotor flux observer for rotor time constant tuning in induction motor drives
Author :
Damiano, A. ; Gatto, G. ; Marongiu, I. ; Attaianese, C. ; Perfetto, A.
Author_Institution :
Cagliari Univ., Italy
fDate :
29 Jun-1 Jul 1998
Abstract :
Field oriented control of induction motor drives needs the detection of rotor flux which is usually detected by means of an observer. Rotor time constant variation due to rotor heating de-tunes the observer and, hence, the field oriented control. In the paper an adaptive observer is synthesised, which allows online rotor time constant tuning. The identification of the rotor time constant is performed by a model reference approach. The synthesis of the adaptive observer is conducted using Lyapunov stability theory applied to the drive-observer system. The simulation results evidence the good performance of the proposed observer and, hence, of the overall controlled drive. In particular, the interactive effects between the observer and the parameter identifier gains is evidenced
Keywords :
Lyapunov methods; induction motor drives; machine vector control; observers; parameter estimation; rotors; tuning; Lyapunov stability theory; adaptive rotor flux observer; field oriented control; model reference approach; parameter identifier gains; rotor heating; rotor time constant tuning; Adaptive systems; Control system synthesis; Electric variables control; Heating; Induction motor drives; Induction motors; Observers; Rotors; Temperature control; Torque control;
Conference_Titel :
Advanced Motion Control, 1998. AMC '98-Coimbra., 1998 5th International Workshop on
Conference_Location :
Coimbra
Print_ISBN :
0-7803-4484-7
DOI :
10.1109/AMC.1998.743478