期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 17, 期 6, 页码 1041-1048出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2002.805579
关键词
current model flux observer; induction machine; sensorless control; sliding mode
A new close loop current model flux observer is designed to estimate the rotor flux, position and velocity of an induction machine. The current observer includes carefully designed sliding mode functions which are derivative of the fluxes along the alpha and beta axes. Therefore, when the estimated current converges to the measured one, the flux estimation is a mere integration of the sliding mode function. The rotor speed can then be derived from the sliding mode functions and the estimated flux. In the current and flux observers all of the terms that contain the rotor time constant and the rotor speed have been replaced by the sliding mode functions, thus making the proposed current and flux estimations completely insensitive to the rotor time constant variation and any error in the estimated speed. Simulations' and experiments are performed under a variety of conditions to validate the effectiveness of the proposed algorithm.
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