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

This paper presents a low-cost bidirectional isolated dc-dc converter, derived from dual-active-bridge converter for the power sources with variable output voltage like super capacitors. The proposed converter consists of push-pull-forward circuit half-bridge circuit (PPFHB) and a high-frequency tra...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2012-07, Vol.59 (7), p.2761-2771
Main Authors: Zhe Zhang, Thomsen, O. C., Andersen, M. A. E.
Format: Article
Language:English
Subjects:
Bidirectional
Circuits
Converters
coupled inductors
Couplings
Design engineering
Digital signal processors
Electric potential
Inductance
Inductors
isolated dc-dc converter
Leg
Optimization
soft-switched
Studies
supercapacitor
Switching
Voltage
Windings
Zero voltage switching
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Summary:This paper presents a low-cost bidirectional isolated dc-dc converter, derived from dual-active-bridge converter for the power sources with variable output voltage like super capacitors. 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.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2011.2134051