Design and Implementation of A 1000V Input SiC/Si Hybrid LLC Resonant Converter with Asymmetrical Input and Paralleled Output Structure

Yue Liu; C. Q. Jiang; Chen Chen; Tianlu Ma; Sheng Ren; Junhui Yang; Hongfei Wu

doi:10.1109/ECCE58356.2025.11260060

Design and Implementation of A 1000V Input SiC/Si Hybrid LLC Resonant Converter with Asymmetrical Input and Paralleled Output Structure

Yue Liu^*
, C. Q. Jiang
, Chen Chen
, Tianlu Ma
, Sheng Ren
, Junhui Yang
, 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

Abstract

For conventional applications with high input voltage, symmetrical input-series output-parallel (ISOP) resonant converter might be a good choice. However, for some special input voltage such as 1000 V, two modules will lead to insufficient voltage stress margin, while three modules will result in excessive voltage stress redundancy. Hence, to achieve high utilization of active devices, asymmetrical ISOP resonant converter is employed in this paper. However, the secondary side output current for each converter is not equal to each other which will lead to the problem of uneven heat distribution. Hence, in this paper, the resonant inductors are configured on the secondary side and one of the inductors is split to adjust the output current distribution relationship. Finally, a 1000V}/28V input SiC/Si hybrid ISOP LLC resonant converter with asymmetrical input and parallel output structure was designed and implemented. Experiments were conducted to validate the feasibility of the converters studied. © 2025 IEEE

Original language	English
Title of host publication	2025 IEEE Energy Conversion Conference Congress and Exposition (ECCE)
Publisher	IEEE
Number of pages	5
ISBN (Electronic)	979-8-3315-4130-9, 979-8-3315-4129-3
ISBN (Print)	979-8-3315-4131-6
DOIs	https://doi.org/10.1109/ECCE58356.2025.11260060
Publication status	Published - 2025
Event	17th IEEE Energy Conversion Congress and Expo (ECCE 2025): Connecting Minds, Powering Innovations - Pennsylvania Convention Center, Philadelphia, United States Duration: 19 Oct 2025 → 23 Oct 2025 https://www.ieee-ecce.org/2025/

Conference

Conference	17th IEEE Energy Conversion Congress and Expo (ECCE 2025)
Abbreviated title	IEEE ECCE 2025
Place	United States
City	Philadelphia
Period	19/10/25 → 23/10/25
Internet address	https://www.ieee-ecce.org/2025/

Funding

This work was supported in part by the Huawei under 9220168, and Chow Sang Sang 9229159.

Research Keywords

input-series output-parallel
LLC resonant converter
asymmetrical input
parallel output
high input voltage

RGC Funding Information

RGC-funded

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10.1109/ECCE58356.2025.11260060

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Cite this

@inproceedings{138bff09b8464f8c9f6e88167c6cd39d,

title = "Design and Implementation of A 1000V Input SiC/Si Hybrid LLC Resonant Converter with Asymmetrical Input and Paralleled Output Structure",

abstract = "For conventional applications with high input voltage, symmetrical input-series output-parallel (ISOP) resonant converter might be a good choice. However, for some special input voltage such as 1000 V, two modules will lead to insufficient voltage stress margin, while three modules will result in excessive voltage stress redundancy. Hence, to achieve high utilization of active devices, asymmetrical ISOP resonant converter is employed in this paper. However, the secondary side output current for each converter is not equal to each other which will lead to the problem of uneven heat distribution. Hence, in this paper, the resonant inductors are configured on the secondary side and one of the inductors is split to adjust the output current distribution relationship. Finally, a 1000V\}/28V input SiC/Si hybrid ISOP LLC resonant converter with asymmetrical input and parallel output structure was designed and implemented. Experiments were conducted to validate the feasibility of the converters studied. {\textcopyright} 2025 IEEE",

keywords = "input-series output-parallel, LLC resonant converter, asymmetrical input, parallel output, high input voltage",

author = "Yue Liu and Jiang, \{C. Q.\} and Chen Chen and Tianlu Ma and Sheng Ren and Junhui Yang and Hongfei Wu",

year = "2025",

doi = "10.1109/ECCE58356.2025.11260060",

language = "English",

isbn = "979-8-3315-4131-6",

booktitle = "2025 IEEE Energy Conversion Conference Congress and Exposition (ECCE)",

publisher = "IEEE",

address = "United States",

note = "17th IEEE Energy Conversion Congress and Expo (ECCE 2025) : Connecting Minds, Powering Innovations, IEEE ECCE 2025 ; Conference date: 19-10-2025 Through 23-10-2025",

url = "https://www.ieee-ecce.org/2025/",

}

Liu, Y, Jiang, CQ , Chen, C , Ma, T , Ren, S , Yang, J & Wu, H 2025, Design and Implementation of A 1000V Input SiC/Si Hybrid LLC Resonant Converter with Asymmetrical Input and Paralleled Output Structure. in 2025 IEEE Energy Conversion Conference Congress and Exposition (ECCE). IEEE, 17th IEEE Energy Conversion Congress and Expo (ECCE 2025), Philadelphia, Pennsylvania, United States, 19/10/25. https://doi.org/10.1109/ECCE58356.2025.11260060

Design and Implementation of A 1000V Input SiC/Si Hybrid LLC Resonant Converter with Asymmetrical Input and Paralleled Output Structure. / Liu, Yue; Jiang, C. Q.; Chen, Chen et al.
2025 IEEE Energy Conversion Conference Congress and Exposition (ECCE). IEEE, 2025.

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

TY - GEN

T1 - Design and Implementation of A 1000V Input SiC/Si Hybrid LLC Resonant Converter with Asymmetrical Input and Paralleled Output Structure

AU - Liu, Yue

AU - Jiang, C. Q.

AU - Chen, Chen

AU - Ma, Tianlu

AU - Ren, Sheng

AU - Yang, Junhui

AU - Wu, Hongfei

PY - 2025

Y1 - 2025

N2 - For conventional applications with high input voltage, symmetrical input-series output-parallel (ISOP) resonant converter might be a good choice. However, for some special input voltage such as 1000 V, two modules will lead to insufficient voltage stress margin, while three modules will result in excessive voltage stress redundancy. Hence, to achieve high utilization of active devices, asymmetrical ISOP resonant converter is employed in this paper. However, the secondary side output current for each converter is not equal to each other which will lead to the problem of uneven heat distribution. Hence, in this paper, the resonant inductors are configured on the secondary side and one of the inductors is split to adjust the output current distribution relationship. Finally, a 1000V}/28V input SiC/Si hybrid ISOP LLC resonant converter with asymmetrical input and parallel output structure was designed and implemented. Experiments were conducted to validate the feasibility of the converters studied. © 2025 IEEE

AB - For conventional applications with high input voltage, symmetrical input-series output-parallel (ISOP) resonant converter might be a good choice. However, for some special input voltage such as 1000 V, two modules will lead to insufficient voltage stress margin, while three modules will result in excessive voltage stress redundancy. Hence, to achieve high utilization of active devices, asymmetrical ISOP resonant converter is employed in this paper. However, the secondary side output current for each converter is not equal to each other which will lead to the problem of uneven heat distribution. Hence, in this paper, the resonant inductors are configured on the secondary side and one of the inductors is split to adjust the output current distribution relationship. Finally, a 1000V}/28V input SiC/Si hybrid ISOP LLC resonant converter with asymmetrical input and parallel output structure was designed and implemented. Experiments were conducted to validate the feasibility of the converters studied. © 2025 IEEE

KW - input-series output-parallel

KW - LLC resonant converter

KW - asymmetrical input

KW - parallel output

KW - high input voltage

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U2 - 10.1109/ECCE58356.2025.11260060

DO - 10.1109/ECCE58356.2025.11260060

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

SN - 979-8-3315-4131-6

BT - 2025 IEEE Energy Conversion Conference Congress and Exposition (ECCE)

PB - IEEE

T2 - 17th IEEE Energy Conversion Congress and Expo (ECCE 2025)

Y2 - 19 October 2025 through 23 October 2025

ER -

Design and Implementation of A 1000V Input SiC/Si Hybrid LLC Resonant Converter with Asymmetrical Input and Paralleled Output Structure

Abstract

Conference

Funding

Research Keywords

RGC Funding Information

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DON: Toward Smart and Efficient Automobility in Decentralized 48V Architecture

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

Cite this

Design and Implementation of A 1000V Input SiC/Si Hybrid LLC Resonant Converter with Asymmetrical Input and Paralleled Output Structure

Abstract

Conference

Funding

Research Keywords

RGC Funding Information

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Projects

DON: Toward Smart and Efficient Automobility in Decentralized 48V Architecture

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

Cite this