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Development of energy efficient scheme for speed sensorless induction motor drive
Author(s) -
Pal Abhisek,
Das Sukanta
Publication year - 2020
Publication title -
international transactions on electrical energy systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 42
ISSN - 2050-7038
DOI - 10.1002/2050-7038.12448
Subject(s) - mras , control theory (sociology) , stator , induction motor , computer science , torque , estimator , vector control , engineering , mathematics , physics , voltage , mechanical engineering , statistics , thermodynamics , control (management) , artificial intelligence , electrical engineering
Summary The present paper validates the working of a new model reference adaptive system (MRAS) based sensorless speed control strategy for induction motor (IM) drive in general, using a Golden section (GS) based energy optimization method for low and medium speed range operation. The MRAS is formed using instantaneous and steady‐state values of a fictitious resistive quantity ( R ) that does not carry any physical significance. The said formulation is free from flux computation and independent on stator/rotor resistance variation. Moreover, the sensorless formulation does not involve any integration/differentiation operator. This makes the scheme immune to the drift, saturation and noise related problems enabling accurate estimation of speed even at zero and low‐speeds. This sensorless scheme is further unified with an elementary energy optimization strategy. The overall scheme is observed to work even more efficiently at low load torque without hindering the speed response. Moreover, the performance of the proposed scheme is compared with Q‐MRAS estimator. All the relevant studies, in this context, are done in Matlab/Simulink. The overall scheme has also been verified experimentally using a 3 HP IM drive setup.

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