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High-performance speed servo system considering Voltage saturation of a vector-controlled induction motor

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5 Author(s)
Ohishi, K. ; Dept. of Electr. & Electron. Eng., Nagaoka Univ. of Technol., Niigata, Japan ; Hayasaka, E. ; Nagano, T. ; Harakawa, M.
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Generally, a speed servo system of a vector-controlled induction motor has limitations of motor voltage and current. When the speed servo system has a large torque reference, the output of its PI controller is often saturated. In this case, the conventional servo system stops the integral calculation of its PI controller. However, this system often has a large overshoot and/or an oscillated response caused by both a windup phenomenon and phase error on the vector control condition. This paper proposes a new speed servo system considering voltage saturation for the vector-controlled induction motor. The proposed control method compensates the phase error on vector control condition quickly, and always keeps the vector control condition. The experimental results show that the proposed system well regulates the motor speed and the secondary magnetic flux for a large torque reference without a windup phenomenon.

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Industrial Electronics, IEEE Transactions on  (Volume:53 ,  Issue: 3 )