Sensorless Indirect Vector Control of Induction Motor Drive Robust Against Rotor Resistance Variation

J.S. Thongam, M. Ouhrouche, and R. Beguenane (Canada)


Induction Motor, Field Oriented Control, Extended Kalman Filter, Sensorless Control


Simultaneous estimation of speed and rotor resistance in a vector controlled induction motor drive is presented in this paper. Accurate estimation is achieved without injecting any external signal. This achievement is believed to be a novel contribution. A reduced order model of the motor is used for implementing the estimation algorithm using Extended Kalman Filter (EKF). The model of the motor takes into consideration the coupling between the electrical and mechanical modes of the machine. The estimated speed and rotor resistance are used for realizing indirect Field Oriented Control (FOC) of the induction motor drive.

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