磁界共振結合を用いた複数負荷への一括ワイヤレス給電に関する研究

カテゴリ: 論文誌(論文単位)

グループ名: 【D】産業応用部門

発行日: 2014/06/01

タイトル(英語): Simultaneous Wireless Power Transfer via Magnetic Resonant Coupling to Multiple Receiving Coils

著者名: 居村　岳広（東京大学大学院 新領域創成科学研究科）

著者名(英語): Takehiro Imura (Graduate School of Frontier Sciences, The University of Tokyo)

キーワード: 複数給電，最適化，ワイヤレス電力伝送，磁界共鳴，飛び越し結合　　multiple feed，optimization，wireless power transfer，magnetic resonance coupling，cross coupling

要約(英語): An optimal design for a simultaneous wireless power transfer system is difficult to achieve, as the effect of multiple coils on the total efficiency is unclear. The power loss increases with the number of coils when they are arranged in a straight line. On the other hand, simultaneous wireless power transfer to multiple receiving coils surrounded by a large transmitting coil has not been studied. In this paper, the simultaneous wireless power transfer system is represented by an equivalent circuit, and a detailed study of the total efficiency and optimal load is carried out. The number of coils is increased, and an analysis is performed for both the equal coupling coefficient case and the unequal coupling coefficient case. From the theoretical analysis and experimental results, the total efficiency improves when more coils are added. Nevertheless, the final efficiency is bounded by the internal resistance and the load values at the receiving coils. The proposed equivalent circuit model also demonstrates that the maximum efficiency is achievable by using the optimal resistance for wireless power transfer containing a specific number of coils.

本誌: 電気学会論文誌D（産業応用部門誌） Vol.134 No.6 （2014）

本誌掲載ページ: 625-633 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejias/134/6/134_625/_article/-char/ja/