期刊
JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS
卷 25, 期 5-6, 页码 845-855出版社
TAYLOR & FRANCIS LTD
DOI: 10.1163/156939311794827186
关键词
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资金
- Danish National Advanced Technology Foundation [004-2007-1]
- Sino-Danish Scientific and Technological Cooperation Danish Agency for Science, Technology and Innovation [09-075623]
- National Natural Science Foundation of China (NSFC) [61071063]
In this paper, the efficiency analysis of a mid-range wireless energy transfer system is performed through non-resonant magnetic coupling. It is shown that the self-resistance of the coils and the mutual inductance are critical in achieving a high efficiency, which is indicated by our theoretical formulation and verified in our experiments. It is experimentally shown that high efficiency, up to 65%, can be realized even in a non-resonant wireless energy system which employs a device part with moderate or low quality factor. We also address some aspects of a practical wireless energy transfer system and show that careful design of the de-tuned system can intrinsically minimize the power dissipated in the source part. Our non-resonant scheme presented in this paper allows flexible design and fabrication of a wireless energy transfer systems with transfer distance being several times of the coils' radius.
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