Dual-Input Soft-Switched DC-DC Converter with Isolated Current-Fed Half-Bridge and Voltage-Fed Full-Bridge for Fuel Cell or Photovoltaic Systems

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

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


This paper introduces a new zero-voltage-switching (ZVS) isolated DC-DC converter with two input ports which can
be utilized in hybrid energy systems, for instance, in a fuel cell and super-capacitor system. By fully using two high frequency transformers, the proposed converter can effectively integrate a current-fed boost half-bridge (BHB) and a full-bridge (FB) into one equivalent circuit configuration which has dual-input ability and additionally it can reduce the number of the power devices. With the phase-shift control, it can achieve zero-voltage switching turn-on of active switches and zero-current switching (ZCS) turn-off of diodes leading to negligible reverse recovery loss. Voltage conversion ratio is higher compared to the conventional boost converter owing to the BHB circuit and the corresponding control. Finally, a 25~50 V input, 300~400 V output prototype with a 600 W nominal power rating are built up and tested to demonstrate the effectiveness of the proposed converter topology.
Original languageEnglish
Title of host publicationIEEE Applied Power Electronics Conference & Exhibition
Publication date2013
Publication statusPublished - 2013
Event28th Annual IEEE Applied Power Electronics Conference and Exposition - Long Beach Convention Center, Long Beach CA, United States
Duration: 17 Mar 201321 Mar 2013


Conference28th Annual IEEE Applied Power Electronics Conference and Exposition
LocationLong Beach Convention Center
CountryUnited States
CityLong Beach CA


  • Boost half-bridge (BHB)
  • DC converter
  • Phaseshift control
  • Soft-switched
  • Fuel cell
  • Hybrid

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