Abstract
Wireless power transfer technology constantly involves tradeoffs among transfer distance, power and efficiency. Near-field WPT systems are ideal for high power and efficiency, while far-field WPT prevails at long distance. Pushing to longer distance of inductive wireless power transfer by increasing the coupler size will inevitably be impacted by electromagnetic radiation. This paper aims to push the boundary of near-field inductive WPT to a much longer distance by operating at a higher frequency but without incurring too much radiation effect. Both fundamental and physical coil design considerations are given according to analytical and finite element full-wave simulations, and a GaN-based power electronics system is presented. Preliminary experimental results achieved 300W output power over a 2-meter distance, with a DC-to-DC efficiency of 62%.
Original language | English |
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Title of host publication | 2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 1625-1631 |
Number of pages | 7 |
ISBN (Electronic) | 9798350316445 |
DOIs | |
State | Published - 2023 |
Event | 2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023 - Nashville, United States Duration: Oct 29 2023 → Nov 2 2023 |
Publication series
Name | 2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023 |
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Conference
Conference | 2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023 |
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Country/Territory | United States |
City | Nashville |
Period | 10/29/23 → 11/2/23 |
Funding
This manuscript has been authored by Oak Ridge National Laboratory, operated by UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).
Keywords
- Gallium Nitride
- Self-resonant coil
- Wireless power transfer
- far field
- near field