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Development of highly robust wireless power transfer system using parity-time symmetry

Research Project

Project/Area Number 18K04115
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 21010:Power engineering-related
Research InstitutionOkayama University of Science

Principal Investigator

Ishida Hiroki  岡山理科大学, 理学部, 准教授 (50413761)

Co-Investigator(Kenkyū-buntansha) 古川 裕人  富山高等専門学校, その他部局等, 准教授 (30238670)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsワイヤレス給電 / パリティ・時間対称性 / 低周波 / ロバスト性 / 高ロバスト / 負性抵抗発振 / 超低周波
Outline of Final Research Achievements

The present study develops a wireless power transfer system based on parity-time symmetry (PTS-WPT) in the low-frequency below 20 kHz. Previous study (Assawaworrarit et al. Nature, 546, 387-390(2017)) indicate that a practical system can be realized using a band of a few megahertz. We chose low frequencies below 20kHz to further improve robustness. For the low frequency PTS-WPT, the transmission power decrease with increasing transmission distance was minimized. This suggests that PT symmetry worked in our system.

Academic Significance and Societal Importance of the Research Achievements

パリティ・時間対称性の原理を利用したワイヤレス給電 (PTS-WPT) は、2017 年にスタンフォード大学の研究グループが発表した比較的新しい知見である。よって、実用的システムの提案は、ほとんど無かった。本研究では実用化のためにシステムの低周波化を試みた。先行研究で約2MHzであった動作周波数を1/100以下の20kHzを下げた状態においてもパリティ・時間対称性が保存される条件を結合モード理論を用いて見出し、試作したシステムを用いてパリティ・時間対称性が保存され、従来方式(磁気共鳴方式)から堅牢性が改善したことを確認した。本研究成果は、PTS-WPTの実用化に貢献するものと期待できる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (8 results)

All 2021 2020 2019 Other

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (2 results) Remarks (1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Self-excited Circuit with Negative Resistance for Parity-time-symmetric Wireless Power Transfer and Enhanced Thermal Noise as Seed for Oscillation2021

    • Author(s)
      Tomoaki Kyoden, Hiroki Ishida, Hiroto Furukawa
    • Journal Title

      IEEJ Journal of Industry Applications

      Volume: 10 Issue: 2 Pages: 254-261

    • DOI

      10.1541/ieejjia.20006504

    • NAID

      130007993860

    • ISSN
      2187-1094, 2187-1108
    • Year and Date
      2021-03-01
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Scheme for providing parity-time symmetry for low-frequency wireless power transfer below 20 kHz.2020

    • Author(s)
      Hiroki Ishida, Hiroto Furukawa, Tomoaki Kyoden
    • Journal Title

      Springer Electrical Engineering

      Volume: 103 number1 Issue: 1 Pages: 35-42

    • DOI

      10.1007/s00202-020-01041-3

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effectiveness of Convolutional Perfectly Matched Layer in Time-domain Numerical Analysis of Low-frequency Wireless Power Transfer2019

    • Author(s)
      H. Ishida, T. Kyoden, and H. Furukawa
    • Journal Title

      IEEJ Journal of Industry Applications

      Volume: 8 Issue: 1 Pages: 131-139

    • DOI

      10.1541/ieejjia.8.131

    • NAID

      130007542454

    • ISSN
      2187-1094, 2187-1108
    • Year and Date
      2019-01-01
    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Locating embedded iron bars for wireless power transmission through reinforced-concrete wall2019

    • Author(s)
      H. Furukawa, H. Ishida, and T. Kyoden
    • Journal Title

      SN Applied Sciences

      Volume: 1 Issue: 9

    • DOI

      10.1007/s42452-019-1018-y

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 負性抵抗発振回路を用いた非接触給電装置の周波数追従性2020

    • Author(s)
      石田弘樹、古川裕人、経田僚昭
    • Organizer
      電気学会全国大会 4-095, pp.151-152
    • Related Report
      2019 Research-status Report
  • [Presentation] 低周波非接触給電における磁気結合係数の推定2019

    • Author(s)
      石田弘樹、古川裕人、経田僚昭
    • Organizer
      電気学会全国大会
    • Related Report
      2018 Research-status Report
  • [Remarks] 研究室紹介

    • URL

      http://www.dap.ous.ac.jp/~ishida/

    • Related Report
      2019 Research-status Report
  • [Patent(Industrial Property Rights)] 磁気共鳴型ワイヤレス給電装置2021

    • Inventor(s)
      石田弘樹
    • Industrial Property Rights Holder
      岡山理科大学
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2021-018613
    • Filing Date
      2021
    • Related Report
      2020 Annual Research Report

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Published: 2018-04-23   Modified: 2022-01-27  

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