m nandhini gayathri - Department of EEE, SASTRA University, Thanjavur -۶۱۳ ۴۰۲, India
s Himavathi - Department of EEE, Pondicherry Engineering College, Puducherry - ۶۰۵۰۱۴, India
r Sankaran - Department of EEE, SASTRA University, Thanjavur -۶۱۳ ۴۰۲, India

The performance of Vector Controlled Induction Motor drive depends on the accuracy of rotor resistance which will vary with temperature and frequency. The MRAS approach using reactive powerand flux as a state variable for rotor resistance estimation makes MRAS computationally simpler andeasy to design. In this paper, Rotor Flux based MRAS (RF-MRAS) and Reactive Power based MRAS (RP-MRAS) for rotor resistance estimation is designed and validated through MATLAB simulation. The performance of these two methods are analyzed extensively and compared in terms of accuracyand settling time. The suitable method for rotor resistance estimation for Space Vector PWM Inverter fed induction motor drive is identified. The promising obtained results are presented.

Induction Motor,MRAS,Rotor Resistance Estimator,Flux,Reactive Power