Dynamic performance analysis of MRAS based speed estimators for speed sensorless induction motor drives

Author

Krishna, S. Mohan ; Febin Daya, J.L.

Author_Institution

Sch. of Electr. Eng. (SELECT), VIT Univ., Chennai, India

fYear

2014

fDate

10-11 Oct. 2014

Firstpage

1

Lastpage

6

Abstract

MRAS estimators have become increasingly popular due to their ease of computational usage, flexibility and accurateness in determining the rotor speed of induction motors without speed sensors mounted on the shaft. This paper considers the three most popularly used configurations of MRAS Speed Estimators i.e., Rotor Flux, Back-EMF and Instantaneous Reactive power. The dynamic performance of the same is analyzed for different values of Load torque perturbations and is limited to medium and high speed range only. A mathematical model is presented for each estimator and an equivalent simulink model is built and the results are analyzed and inferences are drawn.

Keywords

induction motor drives; model reference adaptive control systems; perturbation techniques; rotors; sensorless machine control; shafts; torque control; velocity control; MRAS based speed estimators dynamic performance analysis; load torque perturbation; mathematical model; model reference adaptive system; rotor speed; sensorless speed control; speed sensorless induction motor drive; Adaptation models; Mathematical model; Reactive power; Resistance; Rotors; Stators; Torque; Back EMF; Instantaneous Reactive Power; MRAS; Rotor Flux; Sensorless speed control; Speed Estimators;

fLanguage

English

Publisher

ieee

Conference_Titel

Advances in Electronics, Computers and Communications (ICAECC), 2014 International Conference on

Conference_Location

Bangalore

Type

conf

DOI

10.1109/ICAECC.2014.7002467

Filename

7002467