Efficiency-Driven Design of a Reconfigurable Asymmetric LLC Converter with Ultrawide Output Voltage Range for EV Charging Applications

Sergio Fernandez Rojas; Dongsheng Yang; Krzysztof Puczko

doi:10.1109/PEDG61800.2024.10667425

Efficiency-Driven Design of a Reconfigurable Asymmetric LLC Converter with Ultrawide Output Voltage Range for EV Charging Applications

Sergio Fernandez Rojas, Dongsheng Yang, Krzysztof Puczko

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

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Abstract

This article presents a comprehensive design for a reconfigurable LLC converter aimed at mitigating the inherent trade-off between high overall efficiency and a wide voltage range. First, a systematic method is introduced to increase the number of operation modes of the converter. Subsequently, a tailored design methodology is proposed to determine the optimal set of operation modes and transformer turn ratios that minimize the switching frequency span while achieving the target voltage gain range. Simulation results validate the feasibility of the derived operation modes and the effectiveness of the proposed design methodology, demonstrating a narrow switching frequency span of 71-100 kHz and soft-switching operation for all modes. This ensures high overall efficiency across the ultrawide output voltage range of 150 - 1000 V, with a rated power of 3.3 kW and a rated current of 8.5 A .

Original language	English
Title of host publication	2024 IEEE 15th International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2024
Publisher	Institute of Electrical and Electronics Engineers
Number of pages	6
ISBN (Electronic)	979-8-3503-6100-1
DOIs	https://doi.org/10.1109/PEDG61800.2024.10667425
Publication status	Published - 18 Sept 2024
Event	15th International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2024 - Luxembourgh, Luxembourg Duration: 23 Jun 2024 → 26 Jun 2024

Conference

Conference	15th International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2024
Abbreviated title	PEDG 2024
Country/Territory	Luxembourg
City	Luxembourgh
Period	23/06/24 → 26/06/24

Funding

This project has received funding from the European Union's Horizon Europe research and innovation programme under the Marie Sklodowska?Curie Doctoral Networks grant agreement No 101072414 (E2GO).

Funders	Funder number
European Union's Horizon 2020 - Research and Innovation Framework Programme	101072414

Keywords

DC EV-charging
LLC converter
multiple operation modes
structure reconfiguration
wide voltage gain range

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10.1109/PEDG61800.2024.10667425

pdfFinal author version , 1.49 MB
pdfFinal published version, 0.99 MBLicence: TAVERNE

Cite this

Fernandez Rojas, S., Yang, D., & Puczko, K. (2024). Efficiency-Driven Design of a Reconfigurable Asymmetric LLC Converter with Ultrawide Output Voltage Range for EV Charging Applications. In 2024 IEEE 15th International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2024 Article 10667425 Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/PEDG61800.2024.10667425

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Fernandez Rojas, S , Yang, D & Puczko, K 2024, Efficiency-Driven Design of a Reconfigurable Asymmetric LLC Converter with Ultrawide Output Voltage Range for EV Charging Applications. in 2024 IEEE 15th International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2024., 10667425, Institute of Electrical and Electronics Engineers, 15th International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2024, Luxembourgh, Luxembourg, 23/06/24. https://doi.org/10.1109/PEDG61800.2024.10667425

Efficiency-Driven Design of a Reconfigurable Asymmetric LLC Converter with Ultrawide Output Voltage Range for EV Charging Applications. / Fernandez Rojas, Sergio ; Yang, Dongsheng; Puczko, Krzysztof.
2024 IEEE 15th International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2024. Institute of Electrical and Electronics Engineers, 2024. 10667425.

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

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N2 - This article presents a comprehensive design for a reconfigurable LLC converter aimed at mitigating the inherent trade-off between high overall efficiency and a wide voltage range. First, a systematic method is introduced to increase the number of operation modes of the converter. Subsequently, a tailored design methodology is proposed to determine the optimal set of operation modes and transformer turn ratios that minimize the switching frequency span while achieving the target voltage gain range. Simulation results validate the feasibility of the derived operation modes and the effectiveness of the proposed design methodology, demonstrating a narrow switching frequency span of 71-100 kHz and soft-switching operation for all modes. This ensures high overall efficiency across the ultrawide output voltage range of 150 - 1000 V, with a rated power of 3.3 kW and a rated current of 8.5 A .

AB - This article presents a comprehensive design for a reconfigurable LLC converter aimed at mitigating the inherent trade-off between high overall efficiency and a wide voltage range. First, a systematic method is introduced to increase the number of operation modes of the converter. Subsequently, a tailored design methodology is proposed to determine the optimal set of operation modes and transformer turn ratios that minimize the switching frequency span while achieving the target voltage gain range. Simulation results validate the feasibility of the derived operation modes and the effectiveness of the proposed design methodology, demonstrating a narrow switching frequency span of 71-100 kHz and soft-switching operation for all modes. This ensures high overall efficiency across the ultrawide output voltage range of 150 - 1000 V, with a rated power of 3.3 kW and a rated current of 8.5 A .

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Fernandez Rojas S , Yang D, Puczko K. Efficiency-Driven Design of a Reconfigurable Asymmetric LLC Converter with Ultrawide Output Voltage Range for EV Charging Applications. In 2024 IEEE 15th International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2024. Institute of Electrical and Electronics Engineers. 2024. 10667425 doi: 10.1109/PEDG61800.2024.10667425

Efficiency-Driven Design of a Reconfigurable Asymmetric LLC Converter with Ultrawide Output Voltage Range for EV Charging Applications

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