Real-Time Rotor and Stator Resistances Estimation of an Induction Motor

Abstract

In this paper, four schemes for the real-time identification of induction motor parameters are presented. The first and second schemes are for separate identification of the rotor and stator resistances while the third scheme performs simultaneous identification of these two parameters. The signals used in the identification procedure are the measured stator current, voltage command and rotor speed. The fourth scheme for the rotor resistance identification require neither measuring nor estimating of the rotor speed. All schemes are based on the MRAS identification approach and require persistent excitation conditions to be satisfied.