Asymmetrical ISOP LLC Resonant Converter with Integrated Transformer for High Voltage Distributed DC Power system

Yue Liu; C. Q. Jiang; Zhengke Zhang; Yibo Wang; Chen Chen; Xiaosheng Wang; Xin Jin; Hongfei Wu

doi:10.1109/PEDG62294.2025.11060398

Asymmetrical ISOP LLC Resonant Converter with Integrated Transformer for High Voltage Distributed DC Power system

Yue Liu^*
, C. Q. Jiang
, Zhengke Zhang
, Yibo Wang
, Chen Chen
, Xiaosheng Wang
, Xin Jin
, Hongfei Wu

^*Corresponding author for this work

Department of Electrical Engineering

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

2 Citations (Scopus)

Abstract

The multi-module symmetrical input-series output-parallel (ISOP) resonant converter demonstrates potential in mitigating high input voltage stress in distributed DC power systems. However, excessive module integration introduces significant drawbacks, including increased magnetic component size and additional requirements for peripheral power and driving circuits. To address these limitations while improving power density and optimizing device voltage stress distribution, this study investigates an asymmetric ISOP resonant converter utilizing hybrid Si/SiC devices. Key contributions include the design and optimization of an asymmetric planar integrated transformer, along with current sharing optimization for parallel PCB windings to enhance conversion efficiency. Experimental validation through a prototype implementation confirms the superior performance of the proposed asymmetric topology in terms of both power density and efficiency.
© 2025 IEEE

Original language	English
Title of host publication	2025 IEEE 16th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)
Publisher	IEEE
Pages	281-285
Number of pages	5
ISBN (Electronic)	979-8-3315-8549-5
DOIs	https://doi.org/10.1109/PEDG62294.2025.11060398
Publication status	Published - 2025

Funding

This work was supported by the Huawei Seed Project 9229131, and Chow Sang Sang Project 9229159.

Research Keywords

input-series output-parallel
asymmetrical LLC resonant converter
magnetic integration

RGC Funding Information

RGC-funded

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10.1109/PEDG62294.2025.11060398

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Liu, Y., Jiang, C. Q., Zhang, Z., Wang, Y., Chen, C., Wang, X., Jin, X., & Wu, H. (2025). Asymmetrical ISOP LLC Resonant Converter with Integrated Transformer for High Voltage Distributed DC Power system. In 2025 IEEE 16th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) (pp. 281-285). IEEE. https://doi.org/10.1109/PEDG62294.2025.11060398

@inproceedings{fa8827ce30e6419faf37a515b21d322e,

title = "Asymmetrical ISOP LLC Resonant Converter with Integrated Transformer for High Voltage Distributed DC Power system",

abstract = "The multi-module symmetrical input-series output-parallel (ISOP) resonant converter demonstrates potential in mitigating high input voltage stress in distributed DC power systems. However, excessive module integration introduces significant drawbacks, including increased magnetic component size and additional requirements for peripheral power and driving circuits. To address these limitations while improving power density and optimizing device voltage stress distribution, this study investigates an asymmetric ISOP resonant converter utilizing hybrid Si/SiC devices. Key contributions include the design and optimization of an asymmetric planar integrated transformer, along with current sharing optimization for parallel PCB windings to enhance conversion efficiency. Experimental validation through a prototype implementation confirms the superior performance of the proposed asymmetric topology in terms of both power density and efficiency. {\textcopyright} 2025 IEEE",

keywords = "input-series output-parallel, asymmetrical LLC resonant converter, magnetic integration",

author = "Yue Liu and Jiang, \{C. Q.\} and Zhengke Zhang and Yibo Wang and Chen Chen and Xiaosheng Wang and Xin Jin and Hongfei Wu",

year = "2025",

doi = "10.1109/PEDG62294.2025.11060398",

language = "English",

pages = "281--285",

booktitle = "2025 IEEE 16th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)",

publisher = "IEEE",

address = "United States",

}

Asymmetrical ISOP LLC Resonant Converter with Integrated Transformer for High Voltage Distributed DC Power system. / Liu, Yue; Jiang, C. Q.; Zhang, Zhengke et al.
2025 IEEE 16th International Symposium on Power Electronics for Distributed Generation Systems (PEDG). IEEE, 2025. p. 281-285.

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

TY - GEN

T1 - Asymmetrical ISOP LLC Resonant Converter with Integrated Transformer for High Voltage Distributed DC Power system

AU - Liu, Yue

AU - Jiang, C. Q.

AU - Zhang, Zhengke

AU - Wang, Yibo

AU - Chen, Chen

AU - Wang, Xiaosheng

AU - Jin, Xin

AU - Wu, Hongfei

PY - 2025

Y1 - 2025

N2 - The multi-module symmetrical input-series output-parallel (ISOP) resonant converter demonstrates potential in mitigating high input voltage stress in distributed DC power systems. However, excessive module integration introduces significant drawbacks, including increased magnetic component size and additional requirements for peripheral power and driving circuits. To address these limitations while improving power density and optimizing device voltage stress distribution, this study investigates an asymmetric ISOP resonant converter utilizing hybrid Si/SiC devices. Key contributions include the design and optimization of an asymmetric planar integrated transformer, along with current sharing optimization for parallel PCB windings to enhance conversion efficiency. Experimental validation through a prototype implementation confirms the superior performance of the proposed asymmetric topology in terms of both power density and efficiency. © 2025 IEEE

AB - The multi-module symmetrical input-series output-parallel (ISOP) resonant converter demonstrates potential in mitigating high input voltage stress in distributed DC power systems. However, excessive module integration introduces significant drawbacks, including increased magnetic component size and additional requirements for peripheral power and driving circuits. To address these limitations while improving power density and optimizing device voltage stress distribution, this study investigates an asymmetric ISOP resonant converter utilizing hybrid Si/SiC devices. Key contributions include the design and optimization of an asymmetric planar integrated transformer, along with current sharing optimization for parallel PCB windings to enhance conversion efficiency. Experimental validation through a prototype implementation confirms the superior performance of the proposed asymmetric topology in terms of both power density and efficiency. © 2025 IEEE

KW - input-series output-parallel

KW - asymmetrical LLC resonant converter

KW - magnetic integration

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UR - https://www.scopus.com/pages/publications/105011710060

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-105011710060&origin=recordpage

U2 - 10.1109/PEDG62294.2025.11060398

DO - 10.1109/PEDG62294.2025.11060398

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

SP - 281

EP - 285

BT - 2025 IEEE 16th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)

PB - IEEE

ER -

Asymmetrical ISOP LLC Resonant Converter with Integrated Transformer for High Voltage Distributed DC Power system

Abstract

Funding

Research Keywords

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DON_RMG: Compact Intelligent Energy Conversion for Automobility in Smart City - RMGS

DON_RMG: 1 kW GaN Converters for Electric Vehicles with 48 V Decentralized Power Delivery Network - RMGS

Cite this

Asymmetrical ISOP LLC Resonant Converter with Integrated Transformer for High Voltage Distributed DC Power system

Abstract

Funding

Research Keywords

RGC Funding Information

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Projects

DON_RMG: Compact Intelligent Energy Conversion for Automobility in Smart City - RMGS

DON_RMG: 1 kW GaN Converters for Electric Vehicles with 48 V Decentralized Power Delivery Network - RMGS

Cite this