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Speed sensorless vector control of induction motor using extended Kalman filter

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3 Author(s)
Young-Real Kim ; Korea Aerosp. Res. Inst., Taejon, South Korea ; Seung-Ki Sul ; Min-Ho Park

A vector control of an induction motor by an estimated speed using an extended Kalman filter is proposed. With this method, the states are composed of stator current and rotor flux. The rotor speed is regarded as a parameter, and the composite states consist of the original states and the rotor speed. The extended Kalman filter is employed to identify the speed of an induction motor and rotor flux based on the measured quantities such as stator currents and DC link voltage. The estimated speed is used for vector control and overall speed control. Since the current control is performed at a synchronous rotating reference frame, the estimated speed information is also used for the reference frame transformation of the current controller. Computer simulations and experiments of the speed control have been carried out to test the usefulness of the speed estimation algorithm. The experimental results show that the performance of the speed estimation is very good

Published in:

IEEE Transactions on Industry Applications  (Volume:30 ,  Issue: 5 )