Dual Transformer-Based Single-Stage Converter for EV Fast Charger with Flat Efficiency Characteristics

Million Gerado Geda; Huigyeong Song; Phu Do Ba; Bumsoo Cho; Sunju Kim; Sewan Choi

doi:10.1109/APEC48139.2024.10509315

Dual Transformer-Based Single-Stage Converter for EV Fast Charger with Flat Efficiency Characteristics

Million Gerado Geda
, Huigyeong Song
, Phu Do Ba
, Bumsoo Cho
, Sunju Kim
, Sewan Choi

Dept. of Electrical and Information Engineering

Seoul National University of Science and Technology (SNUST)

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

2 Scopus citations

Abstract

This article presented a reconfigurable bidirectional single-stage converter for fast charging applications. The proposed converter is designed for high-power, and a wide voltage range operation to accommodate both 400V and 800V battery-class electric vehicles. This converter achieved flat efficiency using pre-set AC relays for both EV battery classes. In addition, this article presented optimal control variables to increase conversion efficiency and power quality. As a result, soft switching is achieved from 150 to 920V battery voltage. Experimental results from the single module of the 8.4 kW EV charger prototype are provided to verify the theoretical claims. The peak efficiency of 96.7% is achieved. Furthermore, this converter exhibits flat efficiency performance for all charging battery voltage ranges.

Original language	English
Title of host publication	2024 IEEE Applied Power Electronics Conference and Exposition, APEC 2024
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	1706-1711
Number of pages	6
ISBN (Electronic)	9798350316643
DOIs	https://doi.org/10.1109/APEC48139.2024.10509315
State	Published - 2024
Event	39th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2024 - Long Beach, United States Duration: 25 Feb 2024 → 29 Feb 2024

Publication series

Name	Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
ISSN (Print)	1048-2334

Conference

Conference	39th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2024
Country/Territory	United States
City	Long Beach
Period	25/02/24 → 29/02/24

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Fast charging
Wide voltage range
and flat efficiency performance

Access to Document

10.1109/APEC48139.2024.10509315

Cite this

Geda, M. G., Song, H., Ba, P. D., Cho, B., Kim, S., & Choi, S. (2024). Dual Transformer-Based Single-Stage Converter for EV Fast Charger with Flat Efficiency Characteristics. In 2024 IEEE Applied Power Electronics Conference and Exposition, APEC 2024 (pp. 1706-1711). (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APEC48139.2024.10509315

Geda, Million Gerado ; Song, Huigyeong ; Ba, Phu Do et al. / Dual Transformer-Based Single-Stage Converter for EV Fast Charger with Flat Efficiency Characteristics. 2024 IEEE Applied Power Electronics Conference and Exposition, APEC 2024. Institute of Electrical and Electronics Engineers Inc., 2024. pp. 1706-1711 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC).

@inproceedings{f1d0ec024c704756ba13e58cb5eb2abe,

title = "Dual Transformer-Based Single-Stage Converter for EV Fast Charger with Flat Efficiency Characteristics",

abstract = "This article presented a reconfigurable bidirectional single-stage converter for fast charging applications. The proposed converter is designed for high-power, and a wide voltage range operation to accommodate both 400V and 800V battery-class electric vehicles. This converter achieved flat efficiency using pre-set AC relays for both EV battery classes. In addition, this article presented optimal control variables to increase conversion efficiency and power quality. As a result, soft switching is achieved from 150 to 920V battery voltage. Experimental results from the single module of the 8.4 kW EV charger prototype are provided to verify the theoretical claims. The peak efficiency of 96.7\% is achieved. Furthermore, this converter exhibits flat efficiency performance for all charging battery voltage ranges.",

keywords = "Fast charging, Wide voltage range, and flat efficiency performance",

author = "Geda, \{Million Gerado\} and Huigyeong Song and Ba, \{Phu Do\} and Bumsoo Cho and Sunju Kim and Sewan Choi",

note = "Publisher Copyright: {\textcopyright} 2024 IEEE.; 39th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2024 ; Conference date: 25-02-2024 Through 29-02-2024",

year = "2024",

doi = "10.1109/APEC48139.2024.10509315",

language = "English",

series = "Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

pages = "1706--1711",

booktitle = "2024 IEEE Applied Power Electronics Conference and Exposition, APEC 2024",

}

Geda, MG, Song, H, Ba, PD, Cho, B, Kim, S & Choi, S 2024, Dual Transformer-Based Single-Stage Converter for EV Fast Charger with Flat Efficiency Characteristics. in 2024 IEEE Applied Power Electronics Conference and Exposition, APEC 2024. Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, Institute of Electrical and Electronics Engineers Inc., pp. 1706-1711, 39th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2024, Long Beach, United States, 25/02/24. https://doi.org/10.1109/APEC48139.2024.10509315

Dual Transformer-Based Single-Stage Converter for EV Fast Charger with Flat Efficiency Characteristics. / Geda, Million Gerado; Song, Huigyeong; Ba, Phu Do et al.
2024 IEEE Applied Power Electronics Conference and Exposition, APEC 2024. Institute of Electrical and Electronics Engineers Inc., 2024. p. 1706-1711 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Dual Transformer-Based Single-Stage Converter for EV Fast Charger with Flat Efficiency Characteristics

AU - Geda, Million Gerado

AU - Song, Huigyeong

AU - Ba, Phu Do

AU - Cho, Bumsoo

AU - Kim, Sunju

AU - Choi, Sewan

PY - 2024

Y1 - 2024

N2 - This article presented a reconfigurable bidirectional single-stage converter for fast charging applications. The proposed converter is designed for high-power, and a wide voltage range operation to accommodate both 400V and 800V battery-class electric vehicles. This converter achieved flat efficiency using pre-set AC relays for both EV battery classes. In addition, this article presented optimal control variables to increase conversion efficiency and power quality. As a result, soft switching is achieved from 150 to 920V battery voltage. Experimental results from the single module of the 8.4 kW EV charger prototype are provided to verify the theoretical claims. The peak efficiency of 96.7% is achieved. Furthermore, this converter exhibits flat efficiency performance for all charging battery voltage ranges.

AB - This article presented a reconfigurable bidirectional single-stage converter for fast charging applications. The proposed converter is designed for high-power, and a wide voltage range operation to accommodate both 400V and 800V battery-class electric vehicles. This converter achieved flat efficiency using pre-set AC relays for both EV battery classes. In addition, this article presented optimal control variables to increase conversion efficiency and power quality. As a result, soft switching is achieved from 150 to 920V battery voltage. Experimental results from the single module of the 8.4 kW EV charger prototype are provided to verify the theoretical claims. The peak efficiency of 96.7% is achieved. Furthermore, this converter exhibits flat efficiency performance for all charging battery voltage ranges.

KW - Fast charging

KW - Wide voltage range

KW - and flat efficiency performance

UR - https://www.scopus.com/pages/publications/85192782695

U2 - 10.1109/APEC48139.2024.10509315

DO - 10.1109/APEC48139.2024.10509315

M3 - Conference contribution

AN - SCOPUS:85192782695

T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC

SP - 1706

EP - 1711

BT - 2024 IEEE Applied Power Electronics Conference and Exposition, APEC 2024

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 39th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2024

Y2 - 25 February 2024 through 29 February 2024

ER -

Geda MG, Song H, Ba PD, Cho B, Kim S, Choi S. Dual Transformer-Based Single-Stage Converter for EV Fast Charger with Flat Efficiency Characteristics. In 2024 IEEE Applied Power Electronics Conference and Exposition, APEC 2024. Institute of Electrical and Electronics Engineers Inc. 2024. p. 1706-1711. (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC). doi: 10.1109/APEC48139.2024.10509315

Dual Transformer-Based Single-Stage Converter for EV Fast Charger with Flat Efficiency Characteristics

Abstract

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UN SDGs

Keywords

Access to Document

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