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High-frequency electro-mechanical energy conversion

Research Project

Project/Area Number 20K20288
Project/Area Number (Other) 17H06210 (2017-2019)
Research Category

Grant-in-Aid for Challenging Research (Pioneering)

Allocation TypeMulti-year Fund (2020)
Single-year Grants (2017-2019)
Research Field Electrical and electronic engineering and related fields
Research InstitutionYokohama National University

Principal Investigator

Fujimoto Yasutaka  横浜国立大学, 大学院工学研究院, 教授 (60313475)

Project Period (FY) 2017-06-30 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥25,610,000 (Direct Cost: ¥19,700,000、Indirect Cost: ¥5,910,000)
Fiscal Year 2020: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2017: ¥12,090,000 (Direct Cost: ¥9,300,000、Indirect Cost: ¥2,790,000)
Keywords電気機械エネルギー変換 / 高周波 / 電気機器 / モータ / ワイヤレス電力伝送
Outline of Research at the Start

電気エネルギーと機械エネルギーの相互変換の基礎理論は、電束電流が無視できる数十kHz以下の低周波数帯域において概ね確立しており、その応用機器であるモータや発電機は社会で広く用いられているが、これらは主に鉄心と銅線で構成されるため軽量化が難しい。本研究では、電気-機械エネルギー変換の基礎理論を原理から見直し、駆動周波数を数MHz~数GHzまで高周波化した場合の理論の確立とその原理検証を目的とする。低周波数帯域から高周波数帯域まで現象を統一的に扱う新しい電気-機械エネルギー変換工学を開拓し、鉄心や銅線を用いない超軽量なモータや発電機の実現を目指す。

Outline of Final Research Achievements

The basic theory of electrical-mechanical energy conversion has been largely established in the low frequency range below several tens of kHz, where the displacement current can be neglected, and its application devices, such as motors and generators, are widely used. Since they mainly consist of iron core and copper wire, it has been difficult to reduce their weight. In this study, we extended the basic theory of electrical-mechanical energy conversion and proposed and verified an electrical-mechanical energy conversion model when the drive frequency increases from several MHz to several GHz. A rotating motor model driven at 13.56 MHz using magnetic resonance coupling, and a motor model driven at 2.54 GHz using microwave waveguide were proposed and verified by simulations, and it was shown that both of them can generate force in principle, although they are small.

Academic Significance and Societal Importance of the Research Achievements

本研究では、これまで検討されてこなかった数MHz~数GHzの高周波数帯域での電気-機械エネルギー変換のモデルを提案することで、原理的にこれらの高周波数帯域でもエネルギー変換が可能であることを示した点に学術的な意義がある。また、これまでとは性質の異なる全く新しいモータや発電機の開発の可能性を示した。MHz帯域のものでは鉄心を用いず、GHz帯域のものでは鉄心も銅線も用いないことから、軽量に構成できる可能性がある。MHz帯域のモータでは、磁気結合の弱さを磁界共振で補うことができ、固定子-回転子間のギャップを大きくしても性能が劣化しないため、ギャップを可変にできるモータなどの新しい展開が考えられる。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (8 results)

All 2021 2020 2019 2018

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (3 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Analysis of Force Generation in Microwave Motors2021

    • Author(s)
      Masazumi Katoh and Yasutaka Fujimoto
    • Journal Title

      proc. IEEJ Int. Workshop on Sensing, Actuation, Motion Control, and Optimization

      Volume: -

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A Simulation Method for a Motor Design Based on Magnetic Resonance Coupling Technology2020

    • Author(s)
      Ebot Besong John、Fujimoto Yasutaka
    • Journal Title

      proc. Int. Conf. on Electrical Machines and Systems

      Volume: - Pages: 369-373

    • DOI

      10.23919/icems50442.2020.9291149

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A Motor Design Based on Wireless Magnetic Resonance Coupling Technology2020

    • Author(s)
      Ebot Besong John、Fujimoto Yasutaka
    • Journal Title

      proc. IEEE Energy Conversion Congress and Exposition

      Volume: - Pages: 1140-1144

    • DOI

      10.1109/ecce44975.2020.9236068

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A General Framework for the Analysis and Design of a Wireless Resonant Motor2019

    • Author(s)
      John Ebot Besong and Yasutaka Fujimoto
    • Journal Title

      proc. 2019 IEEE International Electric Machines & Drives Conference

      Volume: - Pages: 1966-1970

    • DOI

      10.1109/iemdc.2019.8785220

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Design Analysis for a Novel Wireless Resonant Actuator2018

    • Author(s)
      Besong John Ebot and Yasutaka Fujimoto
    • Journal Title

      Proc. IEEJ Int. Workshop on Sensing, Actuation, Motion Control, and Optimization

      Volume: 1 Pages: 1-6

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Presentation] マイクロ波モータの実現に向けた磁界分布に関する検討2020

    • Author(s)
      加藤正純, 藤本康孝
    • Organizer
      電気学会モータドライブ/回転機/リニアドライブ合同研究会
    • Related Report
      2020 Annual Research Report
  • [Presentation] A Motor Design based on Wireless Magnetic Resonance Coupling Technology2020

    • Author(s)
      John Ebot Besong and Yasutaka Fujimoto
    • Organizer
      IEEE Energy Conversion Congress and Exposition
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A General Framework for the Analysis and Design of a Wireless Resonant Motor2019

    • Author(s)
      John Ebot Besong and Yasutaka Fujimoto
    • Organizer
      IEEE International Electric Machines and Drives Conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research

URL: 

Published: 2017-07-21   Modified: 2024-03-26  

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