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The Wireless Power Transfer System with Magnetic Metamaterials
Author(s): 
Pages: 1-11
Year: Issue:  12
Journal: Transactions of China Electrotechnical Society

Keyword:  MCR-WPTmagnetic metamaterialsHFSStransmission efficiency;
Abstract: For the high distance constraint degree of magnetically-coupled resonant wireless power transfer(MCR-WPT) system transmissionefficiency, this paper analyzed and discussedthe effect of negative magnetic metamaterial on transmission efficiency of MCR-WPT system, deduced and verified the enhancement ofthe transmission of the evanescent wave with negative magnetic metamaterial. A MCR-WPT systemworking at ISM band was constructed and a low frequency spiral negative magnetic metamaterials suited tothe MCR-WPT system was designed in the platform of HFSS.Thenegative magnetic metamaterialdielectric-slab shows negative magnetic properties at the working frequency above 25 MHz. The transmission efficiency of MCR-WPT system configured with spiral negative magnetic metamaterials in different positions was studied. Simulation and experimentresults show that the system transmission efficiency could be improved significantly, when the little-size negative magnetic metamaterials are placed at the transmitting terminal or the middle-size negative magnetic metamaterials are placed at the receiving terminal.Within a fixed transmission distance, the efficiency of the system with magnetic metamaterials has been improved at leastby 20%. In experiments, it has been improved by 30%.
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