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Topology Optimization of Wireless Power Transfer Devices to Maximize Those Efficiency

Research Project

Project/Area Number 22K20431
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0302:Electrical and electronic engineering and related fields
Research InstitutionNagasaki University

Principal Investigator

OTOMO Yoshitsugu  長崎大学, 工学研究科, 助教 (60964442)

Project Period (FY) 2022-08-31 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsワイヤレス電力伝送 / トポロジー最適化 / パラメータ最適化 / 電力伝送効率 / パワエレ回路 / 交流損失解析
Outline of Research at the Start

本研究では,ワイヤレス電力伝送における回路負荷特性やコイル間相対差を考慮した送受電コイルのトポロジー最適化法を確立し,システム全体の効率を飛躍的に改善することを目的とする。本手法により,米国SAEが定める電力効率の国際基準85%を大幅に上回る,電気的および磁気的に高性能なワイヤレス電力伝送を実現可能とする。

Outline of Final Research Achievements

In this study, we developed a topology optimization method for wireless power transfer devices considering magnetic and circuit properties. In the proposed optimization, TX and RX coil shapes are determined by the parameter optimization for manufacturability, whereas the magnetic core shape is determined by the topology optimization. After the circuit parameters considering the eddy current loss in TX and RX coils are computed by using the homogenization-based finite element method, the power transfer efficiencies of the optimized WPT device are evaluated by using a SPICE simulation. It is clarified that the optimized WPT coils result in high efficiency over 90% even when there is a misalignment. This is due to the fact that the magnetic coupling and quality factors are improved by the cap-shaped magnetic core facing each other in TX and RX coils.

Academic Significance and Societal Importance of the Research Achievements

自動車や航空機をはじめとする様々な輸送機械の電動化に伴い,充電の手間を大幅に軽減可能にするワイヤレス電力伝送の需要は日々増している状況にある。その中で,本研究において開発したワイヤレス電力伝送装置の最適設計法はシステム全体としての効率を大幅に改善できるため,社会的な利便性向上と省エネルギー化達成という二つの課題を解決することに寄与する。また,提案法は他のパワーエレクトロニクス関連機器にも適用可能であるため,高効率な電気機器の設計開発に広く貢献できる。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (10 results)

All 2024 2023 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results) Remarks (1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Parameter and Topology Optimizations for Wireless Power Transfer Device Considering Magnetic and Circuit Properties2024

    • Author(s)
      Yoshitsugu Otomo, Kazuki Sato, Ken Onozaka, Hajime Igarashi
    • Journal Title

      IEEE Transactions on Magnetics

      Volume: 60 Issue: 3 Pages: 1-5

    • DOI

      10.1109/tmag.2023.3301995

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] ワイヤレス給電装置の高効率化に向けた磁気回路と送受電回路の最適設計2024

    • Author(s)
      大友佳嗣,佐藤一樹
    • Journal Title

      電気学会誌

      Volume: 144

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Presentation] ワイヤレス給電装置の磁気回路とインバータ回路の最適設計2024

    • Author(s)
      大友佳嗣
    • Organizer
      令和6年電気学会全国大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Parameter and Topology Optimizations for Wireless Power Transfer Device Considering Magnetic and Circuit Properties2023

    • Author(s)
      Yoshitsugu Otomo, Kazuki Sato, Ken Onozaka, Hajime Igarashi
    • Organizer
      24th International Conference on the Computation of Electromagnetic Field (Compumag 2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] コイル銅損と磁気コア鉄損を考慮したワイヤレス電力伝送用コイルのパラメータ・トポロジー最適化2023

    • Author(s)
      大友佳嗣,佐藤一樹,小野坂健
    • Organizer
      2023年 電気学会 電子・情報・システム部門大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Monte Carlo Tree Search Applied to Design of Wireless Power Transfer System2023

    • Author(s)
      Shuli Yin, Kazuki Sato, Yuki Ito, Hiroaki Ota, Yoshitsugu Otomo, Hajime Igarashi
    • Organizer
      17th International Workshop on Optimization and Inverse Problems in Electromagnetism (OIPE2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 電気電子機器の3次元トポロジー最適化と今後の展望2023

    • Author(s)
      大友佳嗣
    • Organizer
      令和5年度電気・情報関係学会 北海道支部連合大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 磁気・回路特性を考慮したワイヤレス電力伝送用送受電コイルのパラメータ・トポロジー最適化2023

    • Author(s)
      大友 佳嗣,佐藤 一樹,小野坂 健,五十嵐 一
    • Organizer
      令和5年電気学会全国大会
    • Related Report
      2022 Research-status Report
  • [Remarks] 長崎大学学術研究成果リポジトリ:NAOSITE

    • URL

      https://www.lb.nagasaki-u.ac.jp/siryo-search/naosite/

    • Related Report
      2023 Annual Research Report
  • [Patent(Industrial Property Rights)] 磁性体コア,コイル部品,及び非接触給電システム2023

    • Inventor(s)
      佐藤一樹小野坂健三島大地伊藤勇輝小田博章五十嵐一大友佳嗣
    • Industrial Property Rights Holder
      オムロン,北海道大学,長崎大学
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2023-029669
    • Filing Date
      2023
    • Related Report
      2022 Research-status Report

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Published: 2022-09-01   Modified: 2025-01-30  

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