A Step Up/Down Power-Factor-Correction Converter with Modified Dual Loop Control

Abstract

A step up/down AC/DC converter with modified dual loop control is proposed. The step up/down AC/DC converter features the bridgeless characteristic which can reduce bridge-diode conduction losses. Based on the step up/down AC/DC converter, a modified dual loop control scheme is proposed to achieve input current shaping and output voltage regulation. Fewer components are needed compared with the traditional bridge and bridgeless step up/down AC/DC converters. In addition, the intermediate capacitor voltage stress can be reduced. Furthermore, the top and bottom switches still have zero-voltage turn-on function during the negative and positive half-line cycle, respectively. Hence, the thermal stresses can also be reduced and balanced. Simulation and experimental results are provided to verify the validity of the proposed step up/down AC/DC converter and its control scheme.

Special Issue on Selected Papers from IEEE ICKII 2019

“…Liao reported "A Step Up/Down Power-Factor-Correction Converter with Modified Dual Loop Control" [2]. In this study, A step up/down AC/DC converter with a modified dual loop control is proposed.…”

Digital Implementation Method for Synchronous PWM Control of GaN Transistor at Zero-Crossing of Totem-Pole PFC in Energy Storage Applications

“…Research on alternating current (AC)-direct current (DC) power conversion systems has actively been conducted. These devices are essential not only for improving the power factor (PF) and quality but also for reducing harmonics [1]. These, PFCs are essentially used in energy storage applications.…”