M. Tsuji, S. Matsuda, R. Hashimoto, S. Hamasaki, Shuo Chen
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On stability limit of a q-axis flux based sensorless vector control for induction motors
We have proposed a q-axis flux observer based speed sensorless vector control for induction motors with stator resistance identification. A linear model of proposed system is derived and the trajectories of poles and zeros are shown to study the stability limit. A simulation program is developed including the effects of discrete algorithm of proposed method, PWM mechanism and the characteristic of IGBT. The system stability for various parameters are discussed in detail by comparing the experimental results with the simulation results.
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