Design and optimization of cancellation coil topologies for a ferrite-less wireless EV charging pad

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

8 Scopus citations

Abstract

Ferrite cores are widely used in conventional wireless EV charging pads to reduce stray EMF emissions, but they can be brittle, heavy, and expensive. This work furthers the development of ferrite-less wireless charging pads by comparing an active and two distinct passive cancellation coil topologies as candidates to replace the ferrite. Using the software packages FEMM and MATLAB, each topology is optimized to find the best winding positions and radii to minimize leakage at a specified position under the side of the vehicle. The optimized designs are compared for shielding effectiveness, induced current, and efficiency. All three topologies are able to sufficiently reduce the leakage field below the ICNIRP limit of $27\ \mu\mathrm{T}_{\text{rms}}$ with just one turn. Interestingly, we find that an array of simple passive cancellation loops performs similar to the more widely studied passive cancellation coil.

Original languageEnglish
Title of host publication2021 IEEE Transportation Electrification Conference and Expo, ITEC 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages771-775
Number of pages5
ISBN (Electronic)9781728175836
DOIs
StatePublished - Jun 21 2021
Event2021 IEEE Transportation Electrification Conference and Expo, ITEC 2021 - Chicago, United States
Duration: Jun 21 2021Jun 25 2021

Publication series

Name2021 IEEE Transportation Electrification Conference and Expo, ITEC 2021

Conference

Conference2021 IEEE Transportation Electrification Conference and Expo, ITEC 2021
Country/TerritoryUnited States
CityChicago
Period06/21/2106/25/21

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).

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