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Electromagnetic coupling optimization by coil design improvements for contactless power transfer of electric vehicles
conference contribution
posted on 2023-06-09, 15:39 authored by Junlong Duan, William WangWilliam WangThe fossil fuel scarcity worldwide has rapidly driven the electric vehicles and battery charging technologies, including contactless power transfer (CPT), over the past decades. There still exist many technical difficulties to be specifically addressed and ideas to be innovatively achieved although a lot of contribution on EVs charging solutions has been made by the engineering world. In this paper, the comparatively up to date CPT technologies for EVs charging were investigated and the project methodology was discussed from the aspects of maximizing the charging system efficiency, power transfer rating levels and air gaps of charging coupling coils. Until present, the different coil designs, ferrite core deployments, operating frequencies and air gaps are acting as the main investigation factors regarding producing transfer efficiencies and power ratings on the load end. By modeling and simulating the electromagnetic field couplings with the simplified inductive transmitting system in 3D finite-element methods based environment, an Axis-to-Axis (Coaxial) rectangular coil CPT system and an Axis-Parallel (Non-coaxial) rectangular coil system have been modeled and quantitatively compared. Besides, an axis-parallel coil system and a C-Type rectangular coil system deploying ferrite cores with 50 mm air gap have been analyzed, resulting in output efficiencies over 85% and 74%, respectively. In addition, the effectiveness of using a ferrite core to improve the flux linkage and magnetic flux density can be noticed. From the perspective of electromagnetic field, the contributions of deploying natural resonant frequencies of transmitting ground side and receiving vehicle side in terms of system efficiency, magnetic field strength generated and actual power transfer ratings have been described.
History
Publication status
- Published
Journal
Proceedings of the Future Technologies Conference (FTC) 2018ISSN
2194-5357Publisher
Springer, Cham, SwitzerlandExternal DOI
Volume
2Page range
944-958Event name
FTC 2018Event location
Vancouver, CanadaEvent type
conferenceEvent date
13-14 November 2018Place of publication
ChamISBN
9783030026820Series
Advances in Intelligent Systems and ComputingDepartment affiliated with
- Engineering and Design Publications
Research groups affiliated with
- Dynamics, Control and Vehicle Research Group Publications
Full text available
- No
Peer reviewed?
- Yes
Editors
Rahul Bhatia, Supriya Kapoor, Kohei AraiLegacy Posted Date
2018-10-29Usage metrics
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