Title :
A new stable MRAS-based speed and stator resistance estimators for sensorless vector control induction motor drive at low speeds
Author :
Rashed, Mohamed ; Stronach, Fraser ; Vas, Peter
Author_Institution :
Dept. of Eng., Univ. of Aberdeen, UK
Abstract :
MRAS-based sensorless vector control induction motor schemes discussed in the literature suffer from pure integration problems, instability problems and sensitivity to stator resistance mismatch at low speed operation. In this paper, novel stable MRAS speed and stator resistance estimators based on current estimation have been proposed and designed. These estimators have been designed to be stable in the various operating modes, for individual and simultaneous use, following a design procedure based on linear control theory. Simulations and experimental investigations have been performed to show the stability of the proposed estimators.
Keywords :
electric resistance; induction motor drives; machine vector control; model reference adaptive control systems; parameter estimation; stators; MRAS-based speed estimation; current estimation; induction motor drive; instability problems; linear control; low speed operation; pure integration problems; sensitivity; sensorless vector control; stator resistance estimators; stator resistance mismatch; Educational institutions; Error correction; Frequency estimation; Induction motor drives; Induction motors; Machine vector control; Rotors; Stability; Stators; Velocity measurement;
Conference_Titel :
Industry Applications Conference, 2003. 38th IAS Annual Meeting. Conference Record of the
Print_ISBN :
0-7803-7883-0
DOI :
10.1109/IAS.2003.1257700
