磁界共振結合を用いたワイヤレス電力伝送におけるクロスカップリングキャンセリング法の提案

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: 2014/05/01

タイトル(英語): Cross-Coupling Canceling Method for Wireless Power Transfer via Magnetic Resonance Coupling

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，クロスカップリング，クロスカップリングキャンセリング　　multiple fed，optimization，wireless power transfer，magnetic resonance coupling，cross coupling，CCC

要約(英語): The phenomenon of cross coupling between coils is a widely discussed subject in various fields. In communication technology, for example, the resonator is used as a filter. Cross coupling affects the filter characteristic and therefore should be eliminated. The earlier studies, however, are either not applicable to wireless power transfer or lack a detailed treatment of wireless power transfer efficiency. Papers that do mention the undesirable effects of cross coupling on wireless power transfer characteristics do not provide an analysis of how cross coupling affects the transfer efficiency. In this study, we analyzed the effects of cross coupling on the overall efficiency, with a detailed comparison of the results with and without cross coupling. We discovered that at the resonant frequency, as the cross coupling increases, the frequency shift also increases, which causes the efficiency to deteriorate. From this result, we proposed four ideas for efficiency improvement. Among them, the frequency tracking method is most useful for efficiency improvement when the operating frequency is variable. When the operating frequency is fixed, the cross-coupling canceling method can be used to achieve maximum efficiency at the resonant frequency. We also discovered that load value optimization is not needed in the frequency tracking method because the simple tracking method can provide sufficient efficiency improvement.

本誌: 電気学会論文誌D（産業応用部門誌） Vol.134 No.5 （2014）

本誌掲載ページ: 564-574 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/134/5/134_564/_article/-char/ja/