Three-phase PWM rectifier with constant switching frequency

Abstract EN

In this paper, a novel adaptive hysteresis band current control technique based on predictive reasoning for three-phase PWM rectifier is presented.

A simple and quick prediction of the hysteresis band is added to a phase-locked-loop control to ensure constant switching frequency and synchronization of modulation pulses independently on the system parameters.

The proposed technique allows the advantages of quick response, robustness, good current tracking accuracy and minimal supply current ripples.

The three-phase PWM rectifier has the characteristic of drawing nearly sinusoidal current with stable switching frequency and tight control of the position of modulation pulses.

The simulation results show that the designed technique can improve three-phase PWM rectifier performance noticeably.