Design of a MRAS, Speed and Flux Estimators used in Sensorless Control of Induction Motors

Authors : Nadia Ben Sİ ALİ, Nadia BENALİA

Pages : 158-163

View : 14 | Download : 10

Publication Date : 2015-12-30

Article Type : Research Paper

Abstract :Model reference adaptive system insert ignore into journalissuearticles values(MRAS); based techniques are one of the best methods to estimate the rotor speed. Speed and torque control of an induction motor is usually attained by application of a speed or position sensor. However, these require the additional mounting space, reduce the reliability and increase the cost of the motor. The recent trend in field oriented control insert ignore into journalissuearticles values(FOC); is towards the use of sensorless techniques that avert the use of speed sensor and flux sensor. This paper seeks to provide a direct comparison between two technics of induction motor MRAS based speed estimators, one based on the rotor flux and the other based on the back EMF. Comparison between the two techniques is made through computer simulations.
Keywords : Induction motor drive, adaptive observer, MRAS, stability analysis