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

Conference · Thu Jun 01 04:00:00 EDT 2023

DOI:https://doi.org/10.1109/WPTCE56855.2023.10215555· OSTI ID:1999013

Mohammad, Mostak ^[1]; Rallabandi, Vandana ^[1]; Xue, Lincoln ^[1]; Su, Gui-Jia ^[1]; Galigekere, Veda Prakash ^[1]; Chowdhury, Shajjad ^[1]; Wilkins, Jon ^[1]

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1. ORNL

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.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1999013
• Country of Publication: United States
• Language: English