High-Power Density Capacitive Coupler for Power Transfer System in Miniaturized Rotary Application

Yu Wu; Qianhong Chen; Jin'an Yin; Xiaoyong Ren; Zhiliang Zhang

doi:10.17775/CSEEJPES.2021.08330

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High-Power Density Capacitive Coupler for Power Transfer System in Miniaturized Rotary Application

Regular Papers | 更新时间：2026-10-16

- High-Power Density Capacitive Coupler for Power Transfer System in Miniaturized Rotary Application
- High-Power Density Capacitive Coupler for Power Transfer System in Miniaturized Rotary Application
- 中国电机工程学会电力与能源系统学报(英文) 2025年11卷第5期页码：2506-2513
- 作者机构：
  
  Aero-Power Sci-Tech Center, Nanjing University of Aeronautics and Astronautics,Nanjing,China
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2021.08330
  中图分类号：
- 纸质出版：2025-09-01
- 稿件说明：
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Yu Wu, Qianhong Chen, Jin'an Yin, 等. High-Power Density Capacitive Coupler for Power Transfer System in Miniaturized Rotary Application[J]. 中国电机工程学会电力与能源系统学报(英文), 2025,11(5):2506-2513.

Yu Wu, Qianhong Chen, Jin'an Yin, et al. High-Power Density Capacitive Coupler for Power Transfer System in Miniaturized Rotary Application[J]. CSEE Journal of Power and Energy Systems, 2025, 11(5): 2506-2513.
Yu Wu, Qianhong Chen, Jin'an Yin, 等. High-Power Density Capacitive Coupler for Power Transfer System in Miniaturized Rotary Application[J]. 中国电机工程学会电力与能源系统学报(英文), 2025,11(5):2506-2513. DOI： 10.17775/CSEEJPES.2021.08330.

Yu Wu, Qianhong Chen, Jin'an Yin, et al. High-Power Density Capacitive Coupler for Power Transfer System in Miniaturized Rotary Application[J]. CSEE Journal of Power and Energy Systems, 2025, 11(5): 2506-2513. DOI： 10.17775/CSEEJPES.2021.08330.

摘要

Abstract

To realize a high-power density capacitive coupler for miniaturized rotary application

a parameter design method is proposed in this article. Since a capacitive coupler is composed of metal plates and external capacitors

limitations include two parts. One is air breakdown voltage limitation of metal plates

and the other one is withstanding voltage limitation of external capacitors. To quantify voltage limitation

voltage stress is analyzed. Then

an optimal design method for external capacitors is proposed

realizing minimum voltage stress and optimal load condition

simultaneously. Using an optimal external capacitor

a parameter design method is proposed to maximize power density. In which

the air breakdown voltage limitation determines the range of resonant frequency. Then

the withstanding voltage limitation determines specific resonant frequency and composition of external capacitors. Experimental results show the proposed method can realize DC-DC efficiency of 91.35% and power density of 423 W/in

under a 1 kW output condition.

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