Design and Realization of Current-Fed Single-Input Dual-Output Soft-Switched Resonant Converter

Abstract

This paper proposes a new single-input dual-output [SIDO] soft-switched resonant full-bridge converter, which has asymmetrical structures for the isolated multiple outputs. The proposed structure is capable of supplying different loads having dissimilar voltage-current characteristics and independent of each other. This converter features wide range of zero current switching (ZCS) turn-off and automatic load-voltage regulation. In automatic load-voltage regulation, converter maintains constant voltage without the need of change in frequency or duty ratio during load change. First, the modes of converter operation are explained and then design of key parameters have been outlined. A laboratory prototype for 380[Formula: see text]V, 500[Formula: see text]W as main output and 24[Formula: see text]V, 50[Formula: see text]W as auxiliary output for an input voltage range of 40–50[Formula: see text]V was built-up and tested. Experimental results confirm the viability of voltage regulation, ZCS and power efficiency of the proposed converter.

Design and Comparative Analysis of an Ultra-Highly Efficient, Compact Half-Bridge LLC Resonant GaN Converter for Low-Power Applications

“…Therefore, in the most recent few years, researchers from all over the world have been interested in resonant converters due to their soft-switching operation and high-frequency characteristic [17]. These converters are widely used in LCD TV power supplies, LED lighting drivers, EV charging stations, photovoltaic systems and for other useful products due to their advantages of high energy density and efficiency, magnetic integration, electrical isolation, low harmonic pollution and electromagnetic interference, wide output ranges, and low voltage stress [18]. The LLC resonant converters has combined benefits of all others resonant converters, containing DC isolation, reliable no-load operation, low needs of current ripples of capacitor filter, advantages in the voltage regulation of resonant current, soft-switching range [19].…”

“…It is a hybrid of two complete bridges with the addition of two auxiliary switches on the secondary side. The authors of [18] presented a low-voltage LLC resonant converter. The whole input range is split into two parts: a high input voltage range and a low input voltage range.…”