Some key aspects of near-field wireless power transfer technologies for high frequency, high power, and high efficiency
Author(s)
Hui, Shu-Yuen Ron
Zhang, Cheng
Li, Kerui
Wong, Alex MH
Tan, Siew Chong
Type
Journal Article
Abstract
Existing wireless power transfer (WPT) applications and standards mainly rely on sub-Mega-Hertz operations and their power level generally decreases with operating frequency. Many emerging WPT applications have limited charging areas and prefer higher frequency operation for fast charging with improved energy efficiency. With the new recommendations by the International Telecommunication Union on the use of Mega-Hertz frequency bands for nonbeam WPT applications, it is imperative to explore new high-frequency WPT technologies. This article presents the hurdles and possible solutions to the uncharted area of high-frequency (MHz), high-power (kW), and high-efficiency (>95%) WPT technologies. For 1–13.56 MHz operation, the technical hurdles include 1) resonator designs suitable for mass production, 2) ultrafast gate drive designs, 3) power inverters with soft switching, and 4) electromagnetic shielding methods for Mega-Hertz WPT applications. Existing solutions and emerging technologies for overcoming the hurdles in these four key aspects of WPT are addressed.
Date Issued
2025-12-26
Date Acceptance
2025-12-21
Citation
IEEE Transactions on Power Electronics, 2025, 41 (8), pp.12410-12426
ISSN
0885-8993
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Start Page
12410
End Page
12426
Journal / Book Title
IEEE Transactions on Power Electronics
Volume
41
Issue
8
Copyright Statement
© 2025 The Authors. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/
License URL
Publication Status
Published
Date Publish Online
2025-12-26