Adaptive Control of Induction Motors with Unknown Load and Rotor Resistance
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چکیده
This paper considers the design of an observer-based adaptive controller for variable speed threephase AC induction motors. The proposed controller allows for the simultaneous and independent control of the speed (torque) and the flux of the motor without requiring the measurement of the flux, and without the knowledge of the rotor resistance and the motor load. The control adaptively estimates the flux variables and the unknown parameters, using only the measured signals. The control strategy is designed for the equivalent two-phase field-oriented (d-q) model of the motor. Therefore, it does not have stiff nonlinearities and, hence, it is suitable for the discretization and digital implementation with DSPs.
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