Effect of Vertical Metal Plate on Transfer Efficiency of the Wireless Power Transfer System

Lantao Huang, Jiahao Zou, Yihan Zhou, Yan Hong, Jing Zhang and Zinan Ding
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Lantao Huang: Department of Instrumental and Electrical Engineering, Xiamen University, Xiamen 361000, China
Jiahao Zou: Department of Instrumental and Electrical Engineering, Xiamen University, Xiamen 361000, China
Yihan Zhou: Department of Instrumental and Electrical Engineering, Xiamen University, Xiamen 361000, China
Yan Hong: Department of Instrumental and Electrical Engineering, Xiamen University, Xiamen 361000, China
Jing Zhang: Department of Instrumental and Electrical Engineering, Xiamen University, Xiamen 361000, China
Zinan Ding: Department of Instrumental and Electrical Engineering, Xiamen University, Xiamen 361000, China

Energies, 2019, vol. 12, issue 19, 1-15

Abstract: Power transfer efficiency is an important issue in wireless power transfer (WPT). In actual applications, the WPT system may be exposed to a complex electromagnetic environment. The metal which is inevitably or accidentally close to the system will impact the power transfer efficiency. Most previous research has aimed at the effect of the metallic sheet paralleled to the resonant coil. This paper focuses on the effect of the metallic plate perpendicular to the resonant coils. Firstly, based on the theoretical analysis, a simulation model is setup using COMSOL Multiphysics. The efficiencies of the double-coils magnetic resonant WPT system with the presence of the parallel and vertical aluminum plate are studied comparatively. Efficiency improvement is observed with the vertical plate while the reduction appeared with the presence of the parallel plate. The vertical metallic plate has shown a magnetic field shielding effect according to the magnetic field distribution. It can reduce the radial magnetic field and enhance the axial magnetic field. Then, the effects of the position and size of the vertical plate are studied. It is found that the transfer efficiency has a preferable improvement when the vertical aluminum plate with a larger size is placed between the resonant coils and near outer edge of the windings. Finally, the experiment is carried out to verify the effect of the vertical aluminum plate on the WPT system.

Keywords: wireless power transfer; magnetic flux density; metal obstacles (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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