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Research on speed sensorless vector control of induction motor based on torque current differential

According to the rotor flux oriented dynamic mathematical model from Induction motor, the speed can be estimated with synchronous speed based on the torque current differential. Combing with slip formula, in this paper we constitute speed sensorless vector control system of Induction motor with current hysteresis loop control inverter. The simulation results show that the control scheme is valid and the speed estimation scheme is characterized by higher accuracy, faster dynamic response performance and higher steady precision.