June 2023

Conference Paper

Self-Resonant Coil Design for High-frequency High-Power Inductive Wireless Power Transfer

By:
Mohammad, Mostak ; Rallabandi, Vandana P; Xue, Lingxiao ; Su, Gui-Jia ; Galigekere, Veda Prakash ; Chowdhury, Md S; Wilkins, Jonathan P
Page Number:
1-5
Issue Number:
NA
Book Title:
2023 IEEE Wireless Power Technology Conference and Expo (WPTCE)
Publication Date:
June 2023
Publisher Location:
IEEE, New Jersey, United States of America
Conference Name:
IEEE Wireless Power Technology Conference and Expo (WPTCE)
Conference Location:
San Diego, California, United States of America
Conference Sponsor:
IEEE
View DOI Listing:
https://doi.org/10.1109/WPTCE56855.2023.10215555

Abstract

In this paper, the design methodology of a high-frequency, high-power, long-distance inductive wireless power transfer (WPT) is presented. The airgap (d) of a traditional high-power (>1 kW) WPT is limited to a few hundred millimeters, which is almost 1/4th of the coil diameter, D; d ≤ D/4. In this paper, the power transfer distance is significantly increased (d ≥ 1.5D) by adopting a high-frequency magnetic design and GaN-based power electronics. The material and design of the coil and shield are investigated using FEA and tested experimentally. A high frequency 6.78 MHz wireless charging system was built to transfer 1 kW power over 3 m airgap.

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