C.-J. Zhang, D.-Z. Zhao, and L.-Y. Hao (PRC)
induction motor, speed control, and speed observer
An induction motor speed and flux control strategy based on full order adaptive speed observer is proposed in this paper. The control strategy ensures the rotor speed and the magnitude of the rotor flux to track their reference value accurately, and has high robustness against to the variations of the rotor time constant and the load torque. The proposed control law concludes two parts: an open loop reference control which allows to obtain perfect tracking and a closed-loop strategy based on PI controllers for the stabilization around the desired trajectories. The speed observer in this paper has a good performance at low speed region and behaves obvious advantage compared to traditional speed observers.
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