Concentric Circular Coil-Based Coreless PCB Coupler for Medium Voltage Gate Drivers with an Ultra Low Parasitic Capacitance

Wenjie Xu; Junwei Liu; Hai Xu; Taiming Chen; Xiaobiao Wang; Kerui Li; Yi Zhang

doi:10.1109/ECCE58356.2025.11260438

Concentric Circular Coil-Based Coreless PCB Coupler for Medium Voltage Gate Drivers with an Ultra Low Parasitic Capacitance

Wenjie Xu, Junwei Liu, Hai Xu, Taiming Chen, Xiaobiao Wang, Kerui Li, Yi Zhang

Department of Electrical Engineering

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

Abstract

In this paper, a novel concentric circular coil-based coreless print-circuit-board (PCB) coupler is proposed for gate driver (GD) isolated power supply for medium voltage (MV) application. In comparison to the existing design, the proposed concentric circular coreless PCB coupler structure can achieve ultra-low parasitic capacitance, high insulation capacity, and high mutual inductance at a low cost and in compact dimensions, thanks to the ring-embedded structure design. In addition, an optimization methodology balancing mutual inductance, parasitic capacitance, and insulation is analyzed and provided. The regulated voltage gain of the resonant converter is analyzed. The simulation and experimental results show that the parasitic capacitance is 0.9 pF for over 100 kV/µs dv/dt immunity condition, and the partial discharge (PD) test shows insulation strength achieves MV ratings. ©2025 IEEE.

Original language	English
Title of host publication	2025 IEEE Energy Conversion Conference Congress and Exposition (ECCE)
Publisher	IEEE
Number of pages	6
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/ECCE58356.2025.11260438
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/

Publication series

Name	IEEE Energy Conversion Congress and Exposition
ISSN (Print)	2329-3721
ISSN (Electronic)	2329-3748

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 by the Innovation and Technology Fund's Innovation and Technology Support Programme under Project ITP/018/24AP, The Hong Kong Polytechnic University Start-up Fund for RAPs under Project 1-BDSQ, and The Hong Kong Polytechnic University Seed Fund under Project 4-ZZZ4.

Research Keywords

Coreless PCB Coupler
Medium Voltage Gate Driver
Parasitic Capacitance

Access Output

10.1109/ECCE58356.2025.11260438

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

Xu, W., Liu, J., Xu, H., Chen, T., Wang, X., Li, K., & Zhang, Y. (2025). Concentric Circular Coil-Based Coreless PCB Coupler for Medium Voltage Gate Drivers with an Ultra Low Parasitic Capacitance. In 2025 IEEE Energy Conversion Conference Congress and Exposition (ECCE) (IEEE Energy Conversion Congress and Exposition). IEEE. https://doi.org/10.1109/ECCE58356.2025.11260438

@inproceedings{172772873f16479aab79de4c7ad972ec,

title = "Concentric Circular Coil-Based Coreless PCB Coupler for Medium Voltage Gate Drivers with an Ultra Low Parasitic Capacitance",

abstract = "In this paper, a novel concentric circular coil-based coreless print-circuit-board (PCB) coupler is proposed for gate driver (GD) isolated power supply for medium voltage (MV) application. In comparison to the existing design, the proposed concentric circular coreless PCB coupler structure can achieve ultra-low parasitic capacitance, high insulation capacity, and high mutual inductance at a low cost and in compact dimensions, thanks to the ring-embedded structure design. In addition, an optimization methodology balancing mutual inductance, parasitic capacitance, and insulation is analyzed and provided. The regulated voltage gain of the resonant converter is analyzed. The simulation and experimental results show that the parasitic capacitance is 0.9 pF for over 100 kV/µs dv/dt immunity condition, and the partial discharge (PD) test shows insulation strength achieves MV ratings. {\textcopyright}2025 IEEE.",

keywords = "Coreless PCB Coupler, Medium Voltage Gate Driver, Parasitic Capacitance",

author = "Wenjie Xu and Junwei Liu and Hai Xu and Taiming Chen and Xiaobiao Wang and Kerui Li and Yi Zhang",

year = "2025",

doi = "10.1109/ECCE58356.2025.11260438",

language = "English",

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

series = "IEEE Energy Conversion Congress and Exposition",

publisher = "IEEE",

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

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/",

}

Xu, W, Liu, J, Xu, H, Chen, T, Wang, X, Li, K & Zhang, Y 2025, Concentric Circular Coil-Based Coreless PCB Coupler for Medium Voltage Gate Drivers with an Ultra Low Parasitic Capacitance. in 2025 IEEE Energy Conversion Conference Congress and Exposition (ECCE). IEEE Energy Conversion Congress and Exposition, IEEE, 17th IEEE Energy Conversion Congress and Expo (ECCE 2025), Philadelphia, Pennsylvania, United States, 19/10/25. https://doi.org/10.1109/ECCE58356.2025.11260438

Concentric Circular Coil-Based Coreless PCB Coupler for Medium Voltage Gate Drivers with an Ultra Low Parasitic Capacitance. / Xu, Wenjie; Liu, Junwei; Xu, Hai et al.
2025 IEEE Energy Conversion Conference Congress and Exposition (ECCE). IEEE, 2025. (IEEE Energy Conversion Congress and Exposition).

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

TY - GEN

T1 - Concentric Circular Coil-Based Coreless PCB Coupler for Medium Voltage Gate Drivers with an Ultra Low Parasitic Capacitance

AU - Xu, Wenjie

AU - Liu, Junwei

AU - Xu, Hai

AU - Chen, Taiming

AU - Wang, Xiaobiao

AU - Li, Kerui

AU - Zhang, Yi

PY - 2025

Y1 - 2025

N2 - In this paper, a novel concentric circular coil-based coreless print-circuit-board (PCB) coupler is proposed for gate driver (GD) isolated power supply for medium voltage (MV) application. In comparison to the existing design, the proposed concentric circular coreless PCB coupler structure can achieve ultra-low parasitic capacitance, high insulation capacity, and high mutual inductance at a low cost and in compact dimensions, thanks to the ring-embedded structure design. In addition, an optimization methodology balancing mutual inductance, parasitic capacitance, and insulation is analyzed and provided. The regulated voltage gain of the resonant converter is analyzed. The simulation and experimental results show that the parasitic capacitance is 0.9 pF for over 100 kV/µs dv/dt immunity condition, and the partial discharge (PD) test shows insulation strength achieves MV ratings. ©2025 IEEE.

AB - In this paper, a novel concentric circular coil-based coreless print-circuit-board (PCB) coupler is proposed for gate driver (GD) isolated power supply for medium voltage (MV) application. In comparison to the existing design, the proposed concentric circular coreless PCB coupler structure can achieve ultra-low parasitic capacitance, high insulation capacity, and high mutual inductance at a low cost and in compact dimensions, thanks to the ring-embedded structure design. In addition, an optimization methodology balancing mutual inductance, parasitic capacitance, and insulation is analyzed and provided. The regulated voltage gain of the resonant converter is analyzed. The simulation and experimental results show that the parasitic capacitance is 0.9 pF for over 100 kV/µs dv/dt immunity condition, and the partial discharge (PD) test shows insulation strength achieves MV ratings. ©2025 IEEE.

KW - Coreless PCB Coupler

KW - Medium Voltage Gate Driver

KW - Parasitic Capacitance

UR - https://www.webofscience.com/wos/woscc/full-record/WOS:001665554100925

U2 - 10.1109/ECCE58356.2025.11260438

DO - 10.1109/ECCE58356.2025.11260438

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

SN - 979-8-3315-4131-6

T3 - IEEE Energy Conversion Congress and Exposition

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 -

Concentric Circular Coil-Based Coreless PCB Coupler for Medium Voltage Gate Drivers with an Ultra Low Parasitic Capacitance

Abstract

Publication series

Conference

Funding

Research Keywords

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Cite this