A model-based predictive current controller for PWM rectifier

Abstract

Model-based predictive current control scheme proposed in the paper is a constant frequency unipolar PWM control algorithm that achieves a sysmetrical zero-centered current error in every switching cycle. This method is intended to choose the suitable switching instants based on assumed values for the circuit model parameters rather than the real-time measurement of the actual parameters,no feedback is necessary for this control scheme. Based on the pre-determined circuit model of the three-phase PWM rectifier bridge, the desired switching instants are continuously generated so that the supply current is regulated to follow its current reference precisely. The results of simulation verify suggested scheme.

An improved adaptive current control for d.c.-d.c. converters based on current slope detection

“…Different predictive control schemes have been proposed. They can be divided in several groups [5] like hysteresis based [6], [7], trajectory based [8], model-based predictive controls [9], [10] and deadbeat controls [11], [12]. Hysteresis and trajectory based controls have no fixed switching frequency.…”