Title: Rotor flux-based MRAS for three level inverter fed induction motor drive using fuzzy logic controller

Authors: Giribabu Dyanamina; Satya Prakesh Srivastava; Mukesh Kumar Pathak

Addresses: Department of Electrical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India ' Department of Electrical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India ' Department of Electrical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India

Abstract: This paper proposes a sensorless vector control scheme for induction motor to operate at low speed. Low speed operation of rotor flux model reference adaptive system (MRAS) have the problems of dc drift and dead time due to pure integrator present in the reference model. A control scheme is proposed with non-linear integrator in the reference model of the rotor flux-based MRAS speed observer to obtain the compensating voltage. Adaptive model tuning is done with fuzzy logic controller (FLC) in place of PI controller. Multilevel inverter with space vector pulse width modulation (SVPWM) technique is used to improve the performance of drive. A SIMULINK model is developed to compare performance of conventional rotor flux MRAS and proposed control scheme with PI controller and FLC.

Keywords: multilevel inverters; MLI; space vector modulation; rotor flux; MRAS; model reference adaptive system; fuzzy logic controllers; FLC; induction motors; fuzzy control; sensorless vector control; low speed operation; SVPWM; simulation.

DOI: 10.1504/IJPELEC.2012.051371

International Journal of Power Electronics, 2012 Vol.4 No.5, pp.463 - 478

Received: 16 Jan 2012
Accepted: 04 Nov 2012

Published online: 23 Aug 2014 *

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