Modified Model Reference Adaptive Observer for Rotor Speed and Position Estimation in Wound Rotor Induction Machine

Nair, Ramu R and Narayanan, G (2017) Modified Model Reference Adaptive Observer for Rotor Speed and Position Estimation in Wound Rotor Induction Machine. In: IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC), NOV 08-10, 2017, Bangalore, INDIA.

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Abstract

Sensorless estimation of rotor speed and position has numerous advantages in terms of maintenance, cost, robustness and cabling requirements. The existing Model Reference Adaptive System (MRAS) observer considers the cross-product of estimated and actual rotor current vectors as the error input to the PI controller. This results in a non linear plant model, necessitating the use of small signal analysis for controller design. The modified MRAS observer presented here results in a linear plant model, enabling straight-forward design of PI controller and also resulting in improved performance. Simulation and experimental results, presented on a 10-HP Wound Rotor Induction Machine (WRIM), driven by a Squirrel Cage Induction Motor (SCIM) clearly bring out the superior dynamic performance of the modified estimation scheme over the existing scheme. The problem of integrator drift is also addressed in the hardware implementation.

Item Type:	Conference Proceedings
Series.:	Asia-Pacific Power and Energy Engineering Conference
Publisher:	IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA
Additional Information:	Copy right for this article belong to IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	18 Apr 2018 18:23
Last Modified:	18 Apr 2018 18:23
URI:	http://eprints.iisc.ac.in/id/eprint/59628

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