A novel current assisted output voltage control technique for switch-mode-rectifier converters

A novel current-assisted voltage control technique for high-power switch-mode rectifier converters is proposed. This technique implements a fast-forward AC current loop by sensing the current through the output filter capacitor. The control loop forces the AC current component of the output filter inductance to be synchronized with a symmetrical triangular reference waveform. As a result, the converter behaves like a fixed-frequency current-regulated voltage source with a low output impedance and an increased bandwidth. The authors present the analysis for the proposed control technique, provide key design equations and give simulation results that confirm the theory.<>