{"title":"Positioning-free magnetically resonant wireless power transmission board with staggered repeater coil array (SRCA)","authors":"Hyunkeun Lim, K. Ishida, M. Takamiya, T. Sakurai","doi":"10.1109/IMWS.2012.6215767","DOIUrl":null,"url":null,"abstract":"A magnetically resonant wireless power transmission board (MR-WPTB) on a printed-circuit board is developed. MR-WPTB wirelessly supplies the power to electronic devices such as smartphones anywhere on the board with high efficiency. In order to increase a power transmission efficiency degraded by a misalignment of a receiver coil, a transmitter coil array and a proposed staggered repeater coil array (SRCA) are stacked in MR-WPTB. 1 transmitter coil closest to the receiver coil and the surrounding 4 repeater coils are selectively activated based on the result of a position detection of the receiver coil. By adding SRCA to the transmitter coil array, the measured power transmission efficiency at the worst case misalignment increases from 4.8% to 64% at a distance of 15mm between the transmitter and receiver coils with a diameter of 40mm.","PeriodicalId":6308,"journal":{"name":"2012 IEEE MTT-S International Microwave Workshop Series on Innovative Wireless Power Transmission: Technologies, Systems, and Applications","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2012-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"11","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2012 IEEE MTT-S International Microwave Workshop Series on Innovative Wireless Power Transmission: Technologies, Systems, and Applications","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IMWS.2012.6215767","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 11
Abstract
A magnetically resonant wireless power transmission board (MR-WPTB) on a printed-circuit board is developed. MR-WPTB wirelessly supplies the power to electronic devices such as smartphones anywhere on the board with high efficiency. In order to increase a power transmission efficiency degraded by a misalignment of a receiver coil, a transmitter coil array and a proposed staggered repeater coil array (SRCA) are stacked in MR-WPTB. 1 transmitter coil closest to the receiver coil and the surrounding 4 repeater coils are selectively activated based on the result of a position detection of the receiver coil. By adding SRCA to the transmitter coil array, the measured power transmission efficiency at the worst case misalignment increases from 4.8% to 64% at a distance of 15mm between the transmitter and receiver coils with a diameter of 40mm.
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