Cascaded High Voltage Conversion Ratio Bidirectional Nonisolated DC-DC Converter with Variable Switching Frequency

Jianliang Chen; Deshang Sha; Yu Yan; Bin Liu; Xiaozhong Liao

doi:10.1109/TPEL.2017.2679105

Cascaded High Voltage Conversion Ratio Bidirectional Nonisolated DC-DC Converter with Variable Switching Frequency

Jianliang Chen, Deshang Sha^*, Yu Yan, Bin Liu, Xiaozhong Liao

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

53 Citations (Scopus)

Abstract

In this paper, a multistage nonisolated high voltage conversion ratio (VCR) bidirectional dc-dc converter is proposed. The VCR is n times of the conventional buck/boost converter using only n+2 switches. All the switches can achieve full-range zero voltage switching (ZVS) despite the power flow direction. The operating principle, ZVS condition, and design considerations of a four-stage topology are analyzed in detail. In addition, an improved dynamic switching frequency modulation is proposed to reduce the power loss. Analyses and comparisons between the conventional constant frequency and variable frequency control are made to show the effectiveness. A 500-W experimental prototype interfacing 20-30 V with 270 V is fabricated to verify the performance of the proposed converter and control strategy.

Original language	English
Article number	7873321
Pages (from-to)	1399-1409
Number of pages	11
Journal	IEEE Transactions on Power Electronics
Volume	33
Issue number	2
DOIs	https://doi.org/10.1109/TPEL.2017.2679105
Publication status	Published - Feb 2018

Keywords

Bidirectional DC-DC
dynamic frequency modulation
full-range ZVS
high voltage conversion ratio (VCR)
nonisolated

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10.1109/TPEL.2017.2679105

Cite this

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title = "Cascaded High Voltage Conversion Ratio Bidirectional Nonisolated DC-DC Converter with Variable Switching Frequency",

abstract = "In this paper, a multistage nonisolated high voltage conversion ratio (VCR) bidirectional dc-dc converter is proposed. The VCR is n times of the conventional buck/boost converter using only n+2 switches. All the switches can achieve full-range zero voltage switching (ZVS) despite the power flow direction. The operating principle, ZVS condition, and design considerations of a four-stage topology are analyzed in detail. In addition, an improved dynamic switching frequency modulation is proposed to reduce the power loss. Analyses and comparisons between the conventional constant frequency and variable frequency control are made to show the effectiveness. A 500-W experimental prototype interfacing 20-30 V with 270 V is fabricated to verify the performance of the proposed converter and control strategy.",

keywords = "Bidirectional DC-DC, dynamic frequency modulation, full-range ZVS, high voltage conversion ratio (VCR), nonisolated",

author = "Jianliang Chen and Deshang Sha and Yu Yan and Bin Liu and Xiaozhong Liao",

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AU - Chen, Jianliang

AU - Sha, Deshang

AU - Yan, Yu

AU - Liu, Bin

AU - Liao, Xiaozhong

PY - 2018/2

Y1 - 2018/2

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AB - In this paper, a multistage nonisolated high voltage conversion ratio (VCR) bidirectional dc-dc converter is proposed. The VCR is n times of the conventional buck/boost converter using only n+2 switches. All the switches can achieve full-range zero voltage switching (ZVS) despite the power flow direction. The operating principle, ZVS condition, and design considerations of a four-stage topology are analyzed in detail. In addition, an improved dynamic switching frequency modulation is proposed to reduce the power loss. Analyses and comparisons between the conventional constant frequency and variable frequency control are made to show the effectiveness. A 500-W experimental prototype interfacing 20-30 V with 270 V is fabricated to verify the performance of the proposed converter and control strategy.

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Cascaded High Voltage Conversion Ratio Bidirectional Nonisolated DC-DC Converter with Variable Switching Frequency

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