Design and Implementation of a DC–DC resonant LLC converter for electric vehicle fast chargers

Bibliographic Details
Main Author: Rocha, João
Publication Date: 2025
Other Authors: Amin, Saghir, Coelho, Sérgio, Rego, Gonçalo, Afonso, João L., Monteiro, Vítor Duarte Fernandes
Format: Article
Language: eng
Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
Download full: https://hdl.handle.net/1822/95326
Summary: This article presents the design and implementation of a DC–DC power converter for application in electric vehicle (EV) fast-charging systems. The prototype is of the resonant LLC type and consists of a high-power transformer operating at high frequency, which is an essential feature for the adequate behavior of the EV fast-charging system as a whole. As demonstrated throughout the article, by using this converter topology as well as its specific operating modes, such as for achieving zero-voltage switching (ZVS) and zero-current switching (ZCS), it is possible to enhance efficiency by reducing conduction and switching losses as well as to increase power density. The details of the high-power high-frequency transformer (HFT), considering different designs, are presented and discussed. With the implemented laboratorial prototype fully developed with silicon carbide (SiC) power semiconductor devices, it was possible to demonstrate and validate the main features of the resonant LLC converter, including high efficiency, under distinct conditions of operation.
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spelling Design and Implementation of a DC–DC resonant LLC converter for electric vehicle fast chargerselectric vehiclefast chargerDC–DC resonant LLC convertersoft switchinghigh-frequency transformerEngenharia e Tecnologia::Engenharia Eletrotécnica, Eletrónica e InformáticaThis article presents the design and implementation of a DC–DC power converter for application in electric vehicle (EV) fast-charging systems. The prototype is of the resonant LLC type and consists of a high-power transformer operating at high frequency, which is an essential feature for the adequate behavior of the EV fast-charging system as a whole. As demonstrated throughout the article, by using this converter topology as well as its specific operating modes, such as for achieving zero-voltage switching (ZVS) and zero-current switching (ZCS), it is possible to enhance efficiency by reducing conduction and switching losses as well as to increase power density. The details of the high-power high-frequency transformer (HFT), considering different designs, are presented and discussed. With the implemented laboratorial prototype fully developed with silicon carbide (SiC) power semiconductor devices, it was possible to demonstrate and validate the main features of the resonant LLC converter, including high efficiency, under distinct conditions of operation.This paper was supported by the Alliance for the Energy Transition (56) co-financed by the Recovery and Resilience Plan (PRR) through the European Union. This work has been supported by FCT—Fundação para a Ciência e Tecnologia within the R&D Unit Project of ALGORITMI Centre. This work is also part of the project that has received funding from the European Union’s Horizon Europe research and innovation program under the Marie Sklodowska-Curie Doctoral Networks grant agreement No 101072414 (E2GO). João Rocha has a scholarship with the reference ATE_BI_2023_02_CALG (2). Gonçalo Rego has a scholarship with the reference ATE_BI_2024_01_CALG (1). Sergio Coelho is supported by the doctoral scholarship 2021.08965.BD, granted by FCT—Fundação para a Ciência e Tecnologia.MDPIUniversidade do MinhoRocha, JoãoAmin, SaghirCoelho, SérgioRego, GonçaloAfonso, João L.Monteiro, Vítor Duarte Fernandes2025-022025-02-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/95326engRocha, J.; Amin, S.; Coelho, S.; Rego, G.; Afonso, J.L.; Monteiro, V. Design and Implementation of a DC–DC Resonant LLC Converter for Electric Vehicle Fast Chargers. Energies 2025, 18, 1099. https://doi.org/10.3390/en180510991996-107310.3390/en18051099https://www.mdpi.com/1996-1073/18/5/1099info:eu-repo/semantics/openAccessreponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiainstacron:RCAAP2025-04-19T01:17:58Zoai:repositorium.sdum.uminho.pt:1822/95326Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireinfo@rcaap.ptopendoar:https://opendoar.ac.uk/repository/71602025-05-29T06:29:41.617339Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiafalse
dc.title.none.fl_str_mv Design and Implementation of a DC–DC resonant LLC converter for electric vehicle fast chargers
title Design and Implementation of a DC–DC resonant LLC converter for electric vehicle fast chargers
spellingShingle Design and Implementation of a DC–DC resonant LLC converter for electric vehicle fast chargers
Rocha, João
electric vehicle
fast charger
DC–DC resonant LLC converter
soft switching
high-frequency transformer
Engenharia e Tecnologia::Engenharia Eletrotécnica, Eletrónica e Informática
title_short Design and Implementation of a DC–DC resonant LLC converter for electric vehicle fast chargers
title_full Design and Implementation of a DC–DC resonant LLC converter for electric vehicle fast chargers
title_fullStr Design and Implementation of a DC–DC resonant LLC converter for electric vehicle fast chargers
title_full_unstemmed Design and Implementation of a DC–DC resonant LLC converter for electric vehicle fast chargers
title_sort Design and Implementation of a DC–DC resonant LLC converter for electric vehicle fast chargers
author Rocha, João
author_facet Rocha, João
Amin, Saghir
Coelho, Sérgio
Rego, Gonçalo
Afonso, João L.
Monteiro, Vítor Duarte Fernandes
author_role author
author2 Amin, Saghir
Coelho, Sérgio
Rego, Gonçalo
Afonso, João L.
Monteiro, Vítor Duarte Fernandes
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Rocha, João
Amin, Saghir
Coelho, Sérgio
Rego, Gonçalo
Afonso, João L.
Monteiro, Vítor Duarte Fernandes
dc.subject.por.fl_str_mv electric vehicle
fast charger
DC–DC resonant LLC converter
soft switching
high-frequency transformer
Engenharia e Tecnologia::Engenharia Eletrotécnica, Eletrónica e Informática
topic electric vehicle
fast charger
DC–DC resonant LLC converter
soft switching
high-frequency transformer
Engenharia e Tecnologia::Engenharia Eletrotécnica, Eletrónica e Informática
description This article presents the design and implementation of a DC–DC power converter for application in electric vehicle (EV) fast-charging systems. The prototype is of the resonant LLC type and consists of a high-power transformer operating at high frequency, which is an essential feature for the adequate behavior of the EV fast-charging system as a whole. As demonstrated throughout the article, by using this converter topology as well as its specific operating modes, such as for achieving zero-voltage switching (ZVS) and zero-current switching (ZCS), it is possible to enhance efficiency by reducing conduction and switching losses as well as to increase power density. The details of the high-power high-frequency transformer (HFT), considering different designs, are presented and discussed. With the implemented laboratorial prototype fully developed with silicon carbide (SiC) power semiconductor devices, it was possible to demonstrate and validate the main features of the resonant LLC converter, including high efficiency, under distinct conditions of operation.
publishDate 2025
dc.date.none.fl_str_mv 2025-02
2025-02-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://hdl.handle.net/1822/95326
url https://hdl.handle.net/1822/95326
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Rocha, J.; Amin, S.; Coelho, S.; Rego, G.; Afonso, J.L.; Monteiro, V. Design and Implementation of a DC–DC Resonant LLC Converter for Electric Vehicle Fast Chargers. Energies 2025, 18, 1099. https://doi.org/10.3390/en18051099
1996-1073
10.3390/en18051099
https://www.mdpi.com/1996-1073/18/5/1099
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv reponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron:RCAAP
instname_str FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron_str RCAAP
institution RCAAP
reponame_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
collection Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
repository.name.fl_str_mv Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
repository.mail.fl_str_mv info@rcaap.pt
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