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A speed-sensorless vector control method of parallel-connected dual induction motor fed by a single inverter

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4 Author(s)
Matsuse, K. ; Dept. of Electr. Eng., Meiji Univ., Kawasaki, Japan ; Kouno, Y. ; Kawai, H. ; Yokomizo, S.

The purpose of this paper is to present the speed-sensorless vector control method of the torque production from each rotor of two induction motors with parallel-connected stator windings fed by a single inverter. In this paper, an adaptive rotor flux observer is applied to the method in order to eliminate a flux sensor, and an adaptive scheme for rotor speed is added to the adaptive rotor flux observer in order to eliminate a speed sensor. The experimental results show that the proposed method is useful under the condition that the ratings of each induction motor are different.

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Industry Applications, IEEE Transactions on  (Volume:38 ,  Issue: 6 )