A Novel Bidirectional Isolated DC-DC Converter With High Voltage Gain and Wide Input Voltage

This article proposes a novel bidirectional isolated dc-dc converter with high voltage gain and wide input voltage, which can be applied to bidirectional power conversion systems. The proposed topology is composed of a bidirectional buck-boost converter and a forward-flyback converter; it has the ad...

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Published inIEEE transactions on power electronics Vol. 36; no. 7; pp. 7973 - 7985
Main Authors Wu, Yu-En, Ke, Yao-Ting
Format Journal Article
LanguageEnglish
Published New York IEEE 01.07.2021
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Batteries
Bidirectional dc–dc converter
Capacitors
DC-DC power converters
Efficiency
Energy conversion efficiency
Energy recovery
forward-flyback converter
high voltage conversion ratio
High voltages
High-voltage techniques
Inductance
Switches
Topology
Voltage converters (DC to DC)
Voltage gain
Zero voltage switching
zero voltage switching (ZVS)
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Abstract This article proposes a novel bidirectional isolated dc-dc converter with high voltage gain and wide input voltage, which can be applied to bidirectional power conversion systems. The proposed topology is composed of a bidirectional buck-boost converter and a forward-flyback converter; it has the advantage of higher voltage gain and has continuous current characteristic of the low-side port in step-up and step-down mode. In addition, the proposed topology also has the function of leakage inductance energy recovery, which can improve the efficiency of the converter, reduce the voltage surges on switches, and have the characteristics of zero voltage switching on certain switches. Finally, this paper implements a 500-W bidirectional dc-dc converter to verify the feasibility of the proposed topology. The low-side voltage of the proposed topology is 24, 48, and 55 V; the maximum efficiency in step-up mode are 94.2%, 95.6% and 96.9%, and the maximum efficiency are 92.6%, 94.2% and 94.5% in the step-down mode, respectively.
AbstractList This article proposes a novel bidirectional isolated dc-dc converter with high voltage gain and wide input voltage, which can be applied to bidirectional power conversion systems. The proposed topology is composed of a bidirectional buck-boost converter and a forward-flyback converter; it has the advantage of higher voltage gain and has continuous current characteristic of the low-side port in step-up and step-down mode. In addition, the proposed topology also has the function of leakage inductance energy recovery, which can improve the efficiency of the converter, reduce the voltage surges on switches, and have the characteristics of zero voltage switching on certain switches. Finally, this paper implements a 500-W bidirectional dc-dc converter to verify the feasibility of the proposed topology. The low-side voltage of the proposed topology is 24, 48, and 55 V; the maximum efficiency in step-up mode are 94.2%, 95.6% and 96.9%, and the maximum efficiency are 92.6%, 94.2% and 94.5% in the step-down mode, respectively.
Author Wu, Yu-En
Ke, Yao-Ting
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Snippet This article proposes a novel bidirectional isolated dc-dc converter with high voltage gain and wide input voltage, which can be applied to bidirectional power...
This article proposes a novel bidirectional isolated dc–dc converter with high voltage gain and wide input voltage, which can be applied to bidirectional power...
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SubjectTerms Batteries
Bidirectional dc–dc converter
Capacitors
DC-DC power converters
Efficiency
Energy conversion efficiency
Energy recovery
forward-flyback converter
high voltage conversion ratio
High voltages
High-voltage techniques
Inductance
Switches
Topology
Voltage converters (DC to DC)
Voltage gain
Zero voltage switching
zero voltage switching (ZVS)
Title A Novel Bidirectional Isolated DC-DC Converter With High Voltage Gain and Wide Input Voltage
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