Predictive current control of an induction machine by using dichotomy-based method

摘要

This paper presents a novel model predictive current control method for induction machine with constant switching frequency. Using model predictive current control, a cost function considering error between the reference current and the predicted current is designed. A numerical method of quasi-continuous reference voltage calculation based on dichotomy is applied to generate the optimized reference voltage vectors which are selected as the input of PWM before switching the inverter. This can significantly improve the current quality, reduce the torque ripples and ensure fixed switching frequency of the inverter. The proposed method is verified by simulation, in which the induction motor operates with high performance.