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Design Procedure for a Bearingless Motor with Asymmetric Structure and Investigation of its Intelligent Functionality

Research Project

Project/Area Number 20H02100
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 20010:Mechanics and mechatronics-related
Research InstitutionShizuoka University

Principal Investigator

Asama Junichi  静岡大学, 工学部, 准教授 (70447522)

Co-Investigator(Kenkyū-buntansha) 杉元 紘也  東京電機大学, 工学部, 准教授 (60613552)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2022: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2021: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
Fiscal Year 2020: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Keywordsベアリングレスモータ / 磁気浮上 / パワーメカトロニクス / 磁気軸受 / 非対称モータ構造 / 永久磁石モータ / モータ / 非対称 / モータドライブ / パワーエレクトロニクス / 電気機器 / インテリジェント
Outline of Research at the Start

本研究では,電気的および機械的に非対称構造を有する四相ベアリングレス磁気浮上モータの設計手法の確立を目的とする.さらに,ベアリングレスモータの産業応用への拡大を見据え,磁気浮上制御系の不安定化と故障を未然に防ぐ診断(異常検知)機能の付加と,フェールセーフ化,ベアリングレスモータのインテリジェント化技術の構築も,本研究の目的とする.

Outline of Final Research Achievements

The aim of this study is to establish the design method of novel magnetically levitated bearingless motors with electrically and mechanically asymmetric structures. The conversion method of a three-phase brushless DC motor with concentrated winding into four-phase bearingless motor with electrically asymmetric winding configuration has been proposed, based on the magneto-motive force distribution. Additionally, a three-phase slotless bearingless motor where torque and axial suspension force are actively controlled by only one three-phase inverter has been proposed. The rotor of this bearingless motor has mechanically asymmetrical magnet structure where a part of magnet is twisted by electrically 90 degrees. The finite element method calculation and experimental results have verified the effectiveness of the proposed method. Furthermore, a novel bearingless motor with asymmetric air-gap where radial force and torque can be generated with one three-phase inverter has been proposed.

Academic Significance and Societal Importance of the Research Achievements

磁気浮上ベアリングレスモータは,機械損がなく,高寿命・高速駆動が可能であるため,未来の省エネモータとして期待される.三相ブラシレスモータを四相ベアリングレスモータに変換するという発想,また,三相スロットレス永久磁石モータの回転子の一部をひねるだけで軸方向力を発生させる構造,およびその設計手法を確立したことは,学術的にも新しい.さらに,磁気浮上モータでしかできないエアギャップの非対称化により,三相インバータ1台のみで半径方向磁気支持力とトルクを同時に発生可能な新しいベアリングレスモータを提案している点も学術的には新しい.

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (7 results)

All 2023 2022 2021 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (2 results) (of which Int'l Joint Research: 1 results) Remarks (2 results)

  • [Journal Article] Development of Slotless Single-Drive Bearingless Permanent Magnet Motor with Aerostatic Bearings for High-Speed Applications2023

    • Author(s)
      Junichi Asama
    • Journal Title

      IEEE Transactions on Industry Applications

      Volume: - Issue: 4 Pages: 4076-4082

    • DOI

      10.1109/tia.2023.3268998

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Performance Evaluation of a Homopolar Bearingless Motor for Ultrahigh Speed Applications2021

    • Author(s)
      Asama Junichi、Chiba Akira
    • Journal Title

      IEEE Transactions on Industry Applications

      Volume: 57 Issue: 6 Pages: 6913-6920

    • DOI

      10.1109/tia.2021.3089556

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Asymmetrical Four-Phase Combined Winding Arrangement for Bearingless PM Motors2021

    • Author(s)
      Asama Junichi、Kamiya Yoshinori、Chiba Akira
    • Journal Title

      IEEE Transactions on Industry Applications

      Volume: 57 Issue: 6 Pages: 6870-6879

    • DOI

      10.1109/tia.2021.3089447

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] Design of Slotless Single-Drive Bearingless Permanent Magnet Motor for High-Speed Applications2022

    • Author(s)
      Junichi Asama
    • Organizer
      International Power Electronics Conference (IPEC) 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 四相非対称統合巻線形ベアリングレスモータの不等歯ピッチ固定子の設計2022

    • Author(s)
      神谷佳紀,朝間淳一
    • Organizer
      2022年電気学会産業応用部門大会講演論文集
    • Related Report
      2022 Annual Research Report
  • [Remarks] 静岡大学モータ工学研究室

    • URL

      https://wwp.shizuoka.ac.jp/asama/

    • Related Report
      2022 Annual Research Report
  • [Remarks] モータ工学研究室(静岡大学工学部機械工学科朝間研究室)

    • URL

      https://wwp.shizuoka.ac.jp/asama/

    • Related Report
      2021 Annual Research Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

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