| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Numerical Analysis of Magnetic-Shielding Effectiveness for Magnetic Resonant Wireless Power Transfer System |
| Wei-Guo Lu**, Hui-Rong Li**, Wei-Ming Chen, Li-Hui Liu |
State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing 400044
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| Cite this article: |
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Wei-Guo Lu, Hui-Rong Li, Wei-Ming Chen et al 2017 Chin. Phys. Lett. 34 088801 |
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Abstract Magnetic radiation phenomena appear inevitably in the magnetic-resonance wireless power transfer (MR-WPT) system, and regarding this problem the magnetic-shielding scheme is applied to improve the electromagnetic performance in engineering. In this study, the shielding effectiveness of a two-coil MR-WPT system for different material shields is analyzed in theory using Moser's formula and Schelkunoff's formula. On this basis a candidate magnetic-shielding scheme with a double-layer structure is determined, which has better shielding effectiveness and coils coupling coefficient. Finally, some finite element simulation results validate the correctness of the theoretical analysis, and the shielding effectiveness with the double-layer shield in maximum is 30 dB larger than the one with the single-layer case.
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Received: 10 April 2017
Published: 22 July 2017
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| PACS: |
88.80.ht
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(Wireless power transmission)
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41.20.Gz
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(Magnetostatics; magnetic shielding, magnetic induction, boundary-value problems)
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| Fund: Supported by the National Natural Science Foundation of China under Grant No 51377185. |
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