Soft-Switched Dual-Input DC-DC Converter Combining a Boost-Half-Bridge Cell and a Voltage-Fed Full-Bridge Cell

Zhe Zhang, Ole Cornelius Thomsen, Michael A. E. Andersen

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Abstract

This paper presents a new zero-voltage-switching (ZVS) isolated dc-dc converter which combines a boost halfbridge (BHB) cell and a full-bridge (FB) cell, so that two different type of power sources, i.e. both current-fed and voltage-fed, can be coupled effectively by the proposed converter for various applications, such as fuel cell and super-capacitor hybrid energy system. By fully using two high frequency transformers and a shared leg of switches, number of the power devices and associated gate driver circuits can be reduced. With phase-shift control, the converter can achieve ZVS turn-on of active switches and zero-current switching (ZCS) turn-off of diodes. In this paper, derivation, analysis and design of the proposed converter are presented. Finally, a 25~50 V input, 300~400 V output prototype with a 600 W nominal power rating is built up and tested to demonstrate the effectiveness of the proposed converter topology.
Original languageEnglish
JournalI E E E Transactions on Power Electronics
Volume28
Issue number11
Pages (from-to)4897-4902
ISSN0885-8993
DOIs
Publication statusPublished - 2013

Keywords

  • Boost half-bridge (BHB)
  • dc-dc converter
  • Dual-input
  • Phase-shift
  • Soft switching
  • Hybrid

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