Abstract
Wireless charging of an electric vehicle (EV) is an emerging technology that enables noncontact charging, which has advantages in terms of convenience and flexibility. However, the embedded charging pads under and on the ground expose the charging coils, ferrite shielding, and related components to a potentially severe external environment. To study the electromagnetic shielding performance under such extreme temperature conditions, ferrite shielding material's permeability characteristics are tested under temperatures as low as -50°C to as high as 240°C. Referring to the official recorded lowest and highest temperature of the United States, in this paper, it is assumed that the operation temperature ranges from -50°C to 57°C as the coldest winter and hottest summer environment for WPT application. Electromagnetic performance, shielding, and associated stray magnetic emissions are simulated by using three-dimensional (3D) transient simulations to study the impact of low and high temperature on electromagnetic shielding performance. Based on ferrite testing data, from -50°C low temperature to 57°C high temperature, the ferrite's relative permeability ranges from 2550 to 3727. The simulation study indicates that there won't be significant impact on the EM shielding performance for WPT operated under those severe environment temperature conditions.
| Original language | English |
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| Title of host publication | 2023 IEEE Transportation Electrification Conference and Expo, ITEC 2023 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| ISBN (Electronic) | 9798350397420 |
| DOIs | |
| State | Published - 2023 |
| Event | 2023 IEEE Transportation Electrification Conference and Expo, ITEC 2023 - Detroit, United States Duration: Jun 21 2023 → Jun 23 2023 |
Publication series
| Name | 2023 IEEE Transportation Electrification Conference and Expo, ITEC 2023 |
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Conference
| Conference | 2023 IEEE Transportation Electrification Conference and Expo, ITEC 2023 |
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| Country/Territory | United States |
| City | Detroit |
| Period | 06/21/23 → 06/23/23 |
Funding
This manuscript was authored by Idaho National Laboratory, operated by Battelle Energy Alliance with the U.S. Department of Energy under DOE Contract No. DE-AC07-05ID14517. This manuscript has been co-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 nonexclusive, paid-up, irrevocable, worldwide 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). ACKNOWLEDGMENT This work was supported by the U.S. Department of Energy (DOE), Vehicle Technologies Office, under the project FY2022 VTO: “EV@Scale-Wireless Pillar,” with collaborative partners Oak Ridge National Laboratory (ORNL), Idaho National Laboratory, and National Renewable Energy Laboratory. All authors thank Lee Slezak from U.S. DOE for project oversight and technical leadership.
Keywords
- electric vehicle
- electromagnetic field
- ferrite shielding
- inductive power transfer
- wireless power transfer
