Optimal Design of a Push-Pull-Forward Half-Bridge (PPFHB) Bidirectional DC–DC Converter With Variable Input Voltage

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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This paper presents a low-cost bidirectional isolated dc–dc converte, derived from dual-active-bridge converter for the power sources with variable output voltage like supercapacitors. The proposed converter consists of push-pull-forward circuit half-bridge circuit (PPFHB) and a high-frequency transformer; this structure minimizes the number of the switching transistors and their associate gate driver components. With phase-shift control strategy, all the switches are operated under zero-voltage switching (ZVS) condition. Furthermore, in order to optimize the converter performance and increase efficiency, optimal design methods and criteria are investigated, including coupled inductors design, bidirectional power flow analysis, harmonics analysis, and ZVS range extension. Based on all the optimal parameters, higher efficiency can be achieved. Finally, prototypes are built in laboratory controlled by digital signal processor for comparison purpose. Detailed test results verify the theoretical analysis and demonstrate the validity of optimization design method.
Original languageEnglish
JournalI E E E Transactions on Industrial Electronics
Publication date2012
Volume59
Journal number7
Pages2761-2771
ISSN0278-0046
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 10

Keywords

  • Supercapacitor, Soft-switched, Coupled inductors, Isolated dc–dc converter, Optimization, Bidirectional
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