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

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › 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 dvldt immunity condition, and the partial discharge (PD) test shows insulation strength achieves MV ratings.

Original language	English
Title of host publication	2025 IEEE Energy Conversion Conference Congress and Exposition, ECCE 2025
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	1-6
Number of pages	6
ISBN (Electronic)	9798331541309
DOIs	https://doi.org/10.1109/ECCE58356.2025.11260438
Publication status	Published - Oct 2025
Event	17th Annual IEEE Energy Conversion Conference Congress and Exposition, ECCE 2025 - Philadelphia, United States Duration: 19 Oct 2025 → 23 Oct 2025

Publication series

Name	2025 IEEE Energy Conversion Conference Congress and Exposition, ECCE 2025

Conference

Conference	17th Annual IEEE Energy Conversion Conference Congress and Exposition, ECCE 2025
Country/Territory	United States
City	Philadelphia
Period	19/10/25 → 23/10/25

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Coreless PCB Coupler
Medium Voltage Gate Driver
Parasitic Capacitance

ASJC Scopus subject areas

Energy Engineering and Power Technology
Renewable Energy, Sustainability and the Environment
Electrical and Electronic Engineering

More information

10.1109/ECCE58356.2025.11260438

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 2025 (pp. 1-6). (2025 IEEE Energy Conversion Conference Congress and Exposition, ECCE 2025). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE58356.2025.11260438

Xu, Wenjie ; Liu, Junwei ; Xu, Hai et al. / Concentric Circular Coil-Based Coreless PCB Coupler for Medium Voltage Gate Drivers with an Ultra Low Parasitic Capacitance. 2025 IEEE Energy Conversion Conference Congress and Exposition, ECCE 2025. Institute of Electrical and Electronics Engineers Inc., 2025. pp. 1-6 (2025 IEEE Energy Conversion Conference Congress and Exposition, ECCE 2025).

@inproceedings{314b05591e574bdd8211de2924ba1008,

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 dvldt immunity condition, and the partial discharge (PD) test shows insulation strength achieves MV ratings.",

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",

note = "Publisher Copyright: {\textcopyright} 2025 IEEE.; 17th Annual IEEE Energy Conversion Conference Congress and Exposition, ECCE 2025 ; Conference date: 19-10-2025 Through 23-10-2025",

year = "2025",

month = oct,

doi = "10.1109/ECCE58356.2025.11260438",

language = "English",

series = "2025 IEEE Energy Conversion Conference Congress and Exposition, ECCE 2025",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

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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 2025. 2025 IEEE Energy Conversion Conference Congress and Exposition, ECCE 2025, Institute of Electrical and Electronics Engineers Inc., pp. 1-6, 17th Annual IEEE Energy Conversion Conference Congress and Exposition, ECCE 2025, Philadelphia, 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 2025. Institute of Electrical and Electronics Engineers Inc., 2025. p. 1-6 (2025 IEEE Energy Conversion Conference Congress and Exposition, ECCE 2025).

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › 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 - 2025/10

Y1 - 2025/10

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 dvldt immunity condition, and the partial discharge (PD) test shows insulation strength achieves MV ratings.

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 dvldt immunity condition, and the partial discharge (PD) test shows insulation strength achieves MV ratings.

KW - Coreless PCB Coupler

KW - Medium Voltage Gate Driver

KW - Parasitic Capacitance

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U2 - 10.1109/ECCE58356.2025.11260438

DO - 10.1109/ECCE58356.2025.11260438

M3 - Conference article published in proceeding or book

AN - SCOPUS:105030335976

T3 - 2025 IEEE Energy Conversion Conference Congress and Exposition, ECCE 2025

SP - 1

EP - 6

BT - 2025 IEEE Energy Conversion Conference Congress and Exposition, ECCE 2025

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 17th Annual IEEE Energy Conversion Conference Congress and Exposition, ECCE 2025

Y2 - 19 October 2025 through 23 October 2025

ER -

Xu W, Liu J, Xu H, Chen T, Wang X, Li K et al. 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 2025. Institute of Electrical and Electronics Engineers Inc. 2025. p. 1-6. (2025 IEEE Energy Conversion Conference Congress and Exposition, ECCE 2025). doi: 10.1109/ECCE58356.2025.11260438

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

Abstract

Publication series

Conference

UN SDGs

Keywords

ASJC Scopus subject areas

More information

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