Title :
A robust torque controller for induction motors without rotor position sensors: analysis and experimental results
Author :
Khalil, H.K. ; Strangas, E.G. ; Miller, J.M. ; Laubinger, L. ; Al Oliwi, B.
Author_Institution :
Dept. of Electr. Eng., Michigan State Univ., East Lansing, MI, USA
Abstract :
A robust controller, which tracks flux and torque commands is designed for an induction motor. It is based on a transformation to the estimate of the rotor flux. The speed of the rotor is estimated from the stator currents using a high-gain observer. The controller is robust with respect to variations of the rotor resistance. Analysis of the controller shows that the system is asymptotically stable in the motoring region and in the generating region for large enough torque reference. Simulations and experimental results show agreement with the analysis
Keywords :
asymptotic stability; control system analysis; control system synthesis; induction motors; machine control; machine theory; observers; parameter estimation; robust control; rotors; stators; torque control; velocity control; asymptotic stability; control design; control simulation; flux command tracking; high-gain observer; induction motor; robust torque controller; rotor flux estimate; rotor resistance variations; rotor speed estimation; stator currents; torque command tracking; torque reference; Analytical models; Artificial intelligence; Control systems; Induction motors; Robust control; Rotors; Sliding mode control; Stability; Stators; Torque control;
Conference_Titel :
Electric Machines and Drives Conference Record, 1997. IEEE International
Conference_Location :
Milwaukee, WI
Print_ISBN :
0-7803-3946-0
DOI :
10.1109/IEMDC.1997.604188
