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MRAS‐based speed sensorless control scheme with stator resistance identification function for vector‐controlled induction motor drives
Author(s) -
Yang Geng,
Chin TungHai
Publication year - 1993
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.4391130111
Subject(s) - mras , control theory (sociology) , vector control , stator , induction motor , observer (physics) , electronic speed control , rotor (electric) , adaptive system , computer science , control engineering , engineering , control (management) , physics , voltage , artificial intelligence , mechanical engineering , quantum mechanics , electrical engineering
This paper describes a new scheme for the speed sensorless control of the vector‐controlled induction motor drive. Based on the model reference adaptive system (MRAS) theory, the rotor speed of the induction machine is estimated with a full‐order adaptive observer. The estimated speed then is used as the signal for the vector control and the speed control. To accurately estimate the speed at the lower speed range, the value of the stator resistance also is identified at the same time and then is used to modify the resistance value set in the observer. The resulting system is verified to be hyperstable with Popov's criterion. As a result, this drive can operate stably in a wide range of speed even at zero speed. Also, it is shown theoretically that neither speed nor resistance of the rotor can be identified at the same time because these two parameters are dependent on each other. Simulation results and experiments also show that the scheme is effective.