Optimizing a Full-Bridge Capacitor-Clamped LLC Resonant Converter for EV Charging Considering the Effect of Leakage Inductance of the Auxiliary Transformer

Jiayang Wu; Sinan Li; Junming Zeng; Siew-Chong Tan; Shu-Yuen Ron Hui

doi:10.1109/APEC48139.2024.10509171

Optimizing a Full-Bridge Capacitor-Clamped LLC Resonant Converter for EV Charging Considering the Effect of Leakage Inductance of the Auxiliary Transformer

Jiayang Wu^*
, Sinan Li
, Junming Zeng
, Siew-Chong Tan
, Shu-Yuen Ron Hui

^*Corresponding author for this work

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

5 Citations (Scopus)

Abstract

The design of conventional LLC converters for Electric Vehicle (EV) battery charging applications is challenging due to the wide range of output voltage, current, and power levels required during different battery charging states. A novel circuit topology, known as the phase-shifted full-bridge clamped LLC resonant converter, has recently been proposed. It operates in a previously unexplored capacitive (instead of inductive) region of the conventional LLC converter while maintaining Zero-Voltage-Switching for all power switches. This new operating region offers new characteristics that can improve the system's efficiency and power density performance. The study furthers the existing study of this new topology by exploring the impact of the leakage inductance of the auxiliary transformer on the converter's characteristics and proposing an optimization approach to achieve a smaller phase-shift angle range, thus realizing an even higher efficiency. The simulation and experimental results demonstrate the characteristics of specific charging points, providing valuable insights for the development of efficient and reliable EV charging systems. © 2024 IEEE.

Original language	English
Title of host publication	2024 IEEE Applied Power Electronics Conference and Exposition (APEC)
Publisher	IEEE
Pages	3115-3120
ISBN (Electronic)	9798350316643
ISBN (Print)	9798350316650
DOIs	https://doi.org/10.1109/APEC48139.2024.10509171
Publication status	Published - 2024
Externally published	Yes
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
ISSN (Electronic)	2470-6647

Conference

Conference	39th Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2024)
Abbreviated title	APEC2024
Place	United States
City	Long Beach
Period	25/02/24 → 29/02/24

Funding

This project was supported by HKU Philip Wong Wilson Wong endowment fund.

UN SDGs

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

SDG 7 Affordable and Clean Energy

Research Keywords

clamped LLC converter
EV charging
ZCS
ZVS

Access Output

10.1109/APEC48139.2024.10509171

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Permanent Link

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Cite this

Wu, J., Li, S., Zeng, J., Tan, S.-C., & Hui, S.-Y. R. (2024). Optimizing a Full-Bridge Capacitor-Clamped LLC Resonant Converter for EV Charging Considering the Effect of Leakage Inductance of the Auxiliary Transformer. In 2024 IEEE Applied Power Electronics Conference and Exposition (APEC) (pp. 3115-3120). (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC). IEEE. https://doi.org/10.1109/APEC48139.2024.10509171

Wu, Jiayang ; Li, Sinan ; Zeng, Junming et al. / Optimizing a Full-Bridge Capacitor-Clamped LLC Resonant Converter for EV Charging Considering the Effect of Leakage Inductance of the Auxiliary Transformer. 2024 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2024. pp. 3115-3120 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC).

@inproceedings{a2df67bf00ba40e3afbb5d9a2fc01376,

title = "Optimizing a Full-Bridge Capacitor-Clamped LLC Resonant Converter for EV Charging Considering the Effect of Leakage Inductance of the Auxiliary Transformer",

abstract = "The design of conventional LLC converters for Electric Vehicle (EV) battery charging applications is challenging due to the wide range of output voltage, current, and power levels required during different battery charging states. A novel circuit topology, known as the phase-shifted full-bridge clamped LLC resonant converter, has recently been proposed. It operates in a previously unexplored capacitive (instead of inductive) region of the conventional LLC converter while maintaining Zero-Voltage-Switching for all power switches. This new operating region offers new characteristics that can improve the system's efficiency and power density performance. The study furthers the existing study of this new topology by exploring the impact of the leakage inductance of the auxiliary transformer on the converter's characteristics and proposing an optimization approach to achieve a smaller phase-shift angle range, thus realizing an even higher efficiency. The simulation and experimental results demonstrate the characteristics of specific charging points, providing valuable insights for the development of efficient and reliable EV charging systems. {\textcopyright} 2024 IEEE.",

keywords = "clamped LLC converter, EV charging, ZCS, ZVS",

author = "Jiayang Wu and Sinan Li and Junming Zeng and Siew-Chong Tan and Hui, \{Shu-Yuen Ron\}",

year = "2024",

doi = "10.1109/APEC48139.2024.10509171",

language = "English",

isbn = "9798350316650",

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

publisher = "IEEE",

pages = "3115--3120",

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

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note = "39th Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2024), APEC2024 ; Conference date: 25-02-2024 Through 29-02-2024",

}

Wu, J, Li, S, Zeng, J, Tan, S-C & Hui, S-YR 2024, Optimizing a Full-Bridge Capacitor-Clamped LLC Resonant Converter for EV Charging Considering the Effect of Leakage Inductance of the Auxiliary Transformer. in 2024 IEEE Applied Power Electronics Conference and Exposition (APEC). Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, IEEE, pp. 3115-3120, 39th Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2024), Long Beach, California, United States, 25/02/24. https://doi.org/10.1109/APEC48139.2024.10509171

Optimizing a Full-Bridge Capacitor-Clamped LLC Resonant Converter for EV Charging Considering the Effect of Leakage Inductance of the Auxiliary Transformer. / Wu, Jiayang; Li, Sinan; Zeng, Junming et al.
2024 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2024. p. 3115-3120 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC).

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

TY - GEN

T1 - Optimizing a Full-Bridge Capacitor-Clamped LLC Resonant Converter for EV Charging Considering the Effect of Leakage Inductance of the Auxiliary Transformer

AU - Wu, Jiayang

AU - Li, Sinan

AU - Zeng, Junming

AU - Tan, Siew-Chong

AU - Hui, Shu-Yuen Ron

PY - 2024

Y1 - 2024

N2 - The design of conventional LLC converters for Electric Vehicle (EV) battery charging applications is challenging due to the wide range of output voltage, current, and power levels required during different battery charging states. A novel circuit topology, known as the phase-shifted full-bridge clamped LLC resonant converter, has recently been proposed. It operates in a previously unexplored capacitive (instead of inductive) region of the conventional LLC converter while maintaining Zero-Voltage-Switching for all power switches. This new operating region offers new characteristics that can improve the system's efficiency and power density performance. The study furthers the existing study of this new topology by exploring the impact of the leakage inductance of the auxiliary transformer on the converter's characteristics and proposing an optimization approach to achieve a smaller phase-shift angle range, thus realizing an even higher efficiency. The simulation and experimental results demonstrate the characteristics of specific charging points, providing valuable insights for the development of efficient and reliable EV charging systems. © 2024 IEEE.

AB - The design of conventional LLC converters for Electric Vehicle (EV) battery charging applications is challenging due to the wide range of output voltage, current, and power levels required during different battery charging states. A novel circuit topology, known as the phase-shifted full-bridge clamped LLC resonant converter, has recently been proposed. It operates in a previously unexplored capacitive (instead of inductive) region of the conventional LLC converter while maintaining Zero-Voltage-Switching for all power switches. This new operating region offers new characteristics that can improve the system's efficiency and power density performance. The study furthers the existing study of this new topology by exploring the impact of the leakage inductance of the auxiliary transformer on the converter's characteristics and proposing an optimization approach to achieve a smaller phase-shift angle range, thus realizing an even higher efficiency. The simulation and experimental results demonstrate the characteristics of specific charging points, providing valuable insights for the development of efficient and reliable EV charging systems. © 2024 IEEE.

KW - clamped LLC converter

KW - EV charging

KW - ZCS

KW - ZVS

UR - https://www.scopus.com/pages/publications/85192754512

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85192754512&origin=recordpage

U2 - 10.1109/APEC48139.2024.10509171

DO - 10.1109/APEC48139.2024.10509171

M3 - RGC 32 - Refereed conference paper (with host publication)

SN - 9798350316650

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

SP - 3115

EP - 3120

BT - 2024 IEEE Applied Power Electronics Conference and Exposition (APEC)

PB - IEEE

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

Y2 - 25 February 2024 through 29 February 2024

ER -

Wu J, Li S, Zeng J, Tan SC , Hui SYR. Optimizing a Full-Bridge Capacitor-Clamped LLC Resonant Converter for EV Charging Considering the Effect of Leakage Inductance of the Auxiliary Transformer. In 2024 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE. 2024. p. 3115-3120. (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC). Epub 2024 May 2. doi: 10.1109/APEC48139.2024.10509171

Optimizing a Full-Bridge Capacitor-Clamped LLC Resonant Converter for EV Charging Considering the Effect of Leakage Inductance of the Auxiliary Transformer

Abstract

Publication series

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Funding

UN SDGs

Research Keywords

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