A High-Efficiency Bidirectional Single-Stage AC-DC Converter Under Wide Voltage Range for Fast Chargers

Tat Thang Le; Ramadhan Muhammad Hakim; Sewan Choi

doi:10.1109/TPEL.2022.3230404

A High-Efficiency Bidirectional Single-Stage AC-DC Converter Under Wide Voltage Range for Fast Chargers

Tat Thang Le, Ramadhan Muhammad Hakim, Sewan Choi

Dept. of Electrical and Information Engineering

Seoul National University of Science and Technology (SNUST)

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

24 Scopus citations

Abstract

In this article, a single-stage four-phase interleaved totem-pole AC-DC converter for fast charger applications that require high power, wide battery voltage range, and bidirectional operation capabilities is proposed. Due to the four-phase interleaving effect, the grid side switches can operate at duty cycle of 0.25 or 0.5 so that the grid current always achieves ripple-free. A method for secondary side duty cycle generation is proposed for reducing the circulating power and input current total harmonic distortion (THD) under a wide voltage range. The control system is shown to be simple and reliable. An integrated four-phase transformer is designed using one core. Experimental results from a 7.5 kW prototype with an output voltage range of 150 to 750 V are provided to validate the proposed concept.

Original language	English
Pages (from-to)	4945-4956
Number of pages	12
Journal	IEEE Transactions on Power Electronics
Volume	38
Issue number	4
DOIs	https://doi.org/10.1109/TPEL.2022.3230404
State	Published - 1 Apr 2023

Keywords

Current-fed
dual-active-bridge
electrolytic capacitor-less
fast charger
four-phase
push-pull
single-stage
wide voltage range

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10.1109/TPEL.2022.3230404

Cite this

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title = "A High-Efficiency Bidirectional Single-Stage AC-DC Converter Under Wide Voltage Range for Fast Chargers",

abstract = "In this article, a single-stage four-phase interleaved totem-pole AC-DC converter for fast charger applications that require high power, wide battery voltage range, and bidirectional operation capabilities is proposed. Due to the four-phase interleaving effect, the grid side switches can operate at duty cycle of 0.25 or 0.5 so that the grid current always achieves ripple-free. A method for secondary side duty cycle generation is proposed for reducing the circulating power and input current total harmonic distortion (THD) under a wide voltage range. The control system is shown to be simple and reliable. An integrated four-phase transformer is designed using one core. Experimental results from a 7.5 kW prototype with an output voltage range of 150 to 750 V are provided to validate the proposed concept.",

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Y1 - 2023/4/1

N2 - In this article, a single-stage four-phase interleaved totem-pole AC-DC converter for fast charger applications that require high power, wide battery voltage range, and bidirectional operation capabilities is proposed. Due to the four-phase interleaving effect, the grid side switches can operate at duty cycle of 0.25 or 0.5 so that the grid current always achieves ripple-free. A method for secondary side duty cycle generation is proposed for reducing the circulating power and input current total harmonic distortion (THD) under a wide voltage range. The control system is shown to be simple and reliable. An integrated four-phase transformer is designed using one core. Experimental results from a 7.5 kW prototype with an output voltage range of 150 to 750 V are provided to validate the proposed concept.

AB - In this article, a single-stage four-phase interleaved totem-pole AC-DC converter for fast charger applications that require high power, wide battery voltage range, and bidirectional operation capabilities is proposed. Due to the four-phase interleaving effect, the grid side switches can operate at duty cycle of 0.25 or 0.5 so that the grid current always achieves ripple-free. A method for secondary side duty cycle generation is proposed for reducing the circulating power and input current total harmonic distortion (THD) under a wide voltage range. The control system is shown to be simple and reliable. An integrated four-phase transformer is designed using one core. Experimental results from a 7.5 kW prototype with an output voltage range of 150 to 750 V are provided to validate the proposed concept.

KW - Current-fed

KW - dual-active-bridge

KW - electrolytic capacitor-less

KW - fast charger

KW - four-phase

KW - push-pull

KW - single-stage

KW - wide voltage range

UR - https://www.scopus.com/pages/publications/85146215210

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A High-Efficiency Bidirectional Single-Stage AC-DC Converter Under Wide Voltage Range for Fast Chargers

Abstract

Keywords

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