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Development of an ultra-high speed motor achieving both high power density and high efficiency at an ultra-high speed of 100,000 rpm

Research Project

Project/Area Number 21H01312
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 21010:Power engineering-related
Research InstitutionOkayama University

Principal Investigator

Takemoto Masatsugu  岡山大学, 環境生命自然科学学域, 教授 (80313336)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2023: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2022: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Fiscal Year 2021: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Keywords超高速モータ / 超高速 / 高出力密度化 / 高効率化 / 磁石同期モータ
Outline of Research at the Start

研究代表者が新たに提案している新構造を適用することで,高出力密度化と高効率化を両立する4極集中巻構造の超高速モータを開発する。そして,10万rpmの超高速回転下で試作機による実機試験を行い,提案構造が,従来構造に比べて1.5倍という高出力密度化を達成しながらも,高効率化を両立できるという優れた特性を備えていることを検証する。そして,新構造を備えた超高速モータの設計手法の確立も行う。2021年度は,提案構造を備えた超高速モータの解析設計およびドライブシステムを製作する。2022年度は,超高速モータの試作機を製作し,実負荷試験を実施する。2023年度は,更なる高性能化の検討を行う。

Outline of Final Research Achievements

The demand for motors with higher efficiency, smaller size, and higher power density is increasing year by year. Therefore, by applying a new structure proposed by the principal investigator, an ultra high-speed motor with four-pole concentrated winding structure that can achieve both high power density and high efficiency has been developed. The load operation test was conducted using a prototype machine under ultra high-speed rotation of 100,000 rpm. As a result, it was shown that the new structure has excellent characteristics in that it can achieve both high power density 1.5 times higher than the conventional structure and high efficiency. In order to design the ultra high-speed motor with the new structure, the coupled analysis of electromagnetic analysis and thermo-fluid analysis is effective in clarifying the relationship between the loss density distribution and temperature distribution in each part of the motor.

Academic Significance and Societal Importance of the Research Achievements

従来構造である2極機の超高速モータについて,高出力密度化と高効率化の研究を実施しても,ブレークスルーを学術的に得ることは難しい。そこで,研究代表者は,4極化と集中巻構造という高出力密度化を図るうえで効果的な手法を本研究課題で採用した。しかし,この二つの手法は,高出力密度化という点では有効であるが,固定子の鉄損増加に加えて,磁石で大きな渦電流損が生じるため,高効率化とモータの成立性という点で問題がある。従って,従来の2極集中巻構造をそのまま4極化しただけでは高出力密度化と高効率化を両立できないため,研究代表者が新たに提案する新構造が実機試験によりその有効性を実証できた意義は大きい。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (16 results)

All 2023 2022 2021

All Journal Article (7 results) (of which Peer Reviewed: 5 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 8 results)

  • [Journal Article] Reduction in Eddy Current Loss of Special Rectangular Windings in High-Torque IPMSM Used for Wind Generator2023

    • Author(s)
      Tao Xianji、Takemoto Masatsugu、Tsunata Ren、Ogasawara Satoshi
    • Journal Title

      IEEE Access

      Volume: 11 Pages: 4740-4751

    • DOI

      10.1109/access.2023.3236105

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Comparison of Thermal Characteristics in Various Aspect Ratios for Radial-Flux and Axial-Flux Permanent Magnet Machines2023

    • Author(s)
      Tsunata Ren、Takemoto Masatsugu、Imai Jun、Saito Tatsuya、Ueno Tomoyuki
    • Journal Title

      IEEE Transactions on Industry Applications

      Volume: 59 Issue: 3 Pages: 3353-3367

    • DOI

      10.1109/tia.2023.3255845

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Design and Analysis of Hybrid-Excitation Variable Flux Memory Motor for Traction Applications: Improving Output Power in High-Speed Area During Six-Step Operation Mode2023

    • Author(s)
      Tsunata Ren、Yokomichi Keito、Takemoto Masatsugu、Imai Jun
    • Journal Title

      IEEE Access

      Volume: 11 Pages: 82024-82036

    • DOI

      10.1109/access.2023.3301809

    • Related Report
      2023 Annual Research Report
  • [Journal Article] A Proposal of an Axial-Flux Permanent-Magnet Machine Employing SMC Core With Tooth-Tips Constructed by One-Pressing Process: Improving Torque and Manufacturability2023

    • Author(s)
      Tsunata Ren、Takemoto Masatsugu、Imai Jun、Saito Tatsuya、Ueno Tomoyuki
    • Journal Title

      IEEE Access

      Volume: 11 Pages: 109435-109447

    • DOI

      10.1109/access.2023.3321829

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] SMC Development Guidelines for Axial Flux PM Machines Employing Coreless Rotor Structure for Enhancing Efficiency Based on Experimental Results2022

    • Author(s)
      Ren Tsunata, Masatsugu Takemoto, Satoshi Ogasawara, Tatsuya Saito, Tomoyuki Ueno
    • Journal Title

      IEEE Transactions on Industry Applications

      Volume: - Issue: 3 Pages: 3470-3485

    • DOI

      10.1109/tia.2022.3154336

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Hybrid-Type PM Motor for Electric Vehicle Traction with improved Reluctance Torque2022

    • Author(s)
      J. Park, R. Tsunata, M. Takemoto, K. Orikawa, Ogasawara
    • Journal Title

      Journal of the Japan Society of Applied Electromagnetics and Mechanics

      Volume: 30 Pages: 324-334

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Selection of Rotor Retaining Sleeve Considering Loss Density and Prototype Machine Operating Characteristics in 2-pole Ultra-High-Speed Motors2021

    • Author(s)
      Iida Takayuki、Takemoto Masatsugu、Ogasawara Satoshi、Orikawa Koji、Sato Ikuya、Kokubun Hiroyuki、Toba Akio、Shuto Masao
    • Journal Title

      IEEJ Transactions on Industry Applications

      Volume: 141 Issue: 6 Pages: 472-485

    • DOI

      10.1541/ieejias.141.472

    • NAID

      130008046779

    • ISSN
      0913-6339, 1348-8163
    • Year and Date
      2021-06-01
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] The Superiority of Efficiency Considering Harmonic Current caused by PWM inverter in Axial-Flux PM Machine Using Ferrite PM for Traction applications: Comparison to Radial-Flux PM Machines Using NdFeB PM2023

    • Author(s)
      R. Tsunata, M. Takemoto, J. Imai, T. Saito, and T. Ueno
    • Organizer
      the 2023 IEEE Energy Conversion Congress and Exposition (ECCE)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluation of Switching Ripple Effect on Efficiency of Novel Spoke-Type IPMSM Using Dy-Free Magnet-Comparison to IPMSM using NbFeB Magnet2022

    • Author(s)
      J. Park, R. Tsunata, M. Takemoto, S. Ogasawara and K. Orikawa
    • Organizer
      2022 25th International Conference on Electrical Machines and Systems (ICEMS)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Dividing Repulsion Permanent Magnets for Enhancing Suspension Force Characteristics in a 1-axis Active Control Type Magnetic Levitation Pump2022

    • Author(s)
      K. Terada, M. Takemoto, R. Tsunata and J. Imai
    • Organizer
      IECON 2022; 48th Annual Conference of the IEEE Industrial Electronics Society
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Examination of the Characteristics of a Hybrid Excitation Motor with Field Winding on a Rotor for Electric Vehicle and Hybrid Vehicle Traction2022

    • Author(s)
      R. Nakazawa, M. Takemoto, S. Ogasawara, R. Tsunata and K. Orikawa
    • Organizer
      IECON 2022; 48th Annual Conference of the IEEE Industrial Electronics Society
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Axial-Flux Machine Using Ferrite PM and Round Wire Competitive to Radial-Flux Machine Using Nd-Fe-B PM for HEV Traction2022

    • Author(s)
      K. Izumiya, R. Tsunata, M. Takemoto, J. Imai, T. Saito and T. Ueno
    • Organizer
      the 2022 International Conference on Electrical Machines (ICEM), 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A Proposal of Hybrid Excitation Variable Flux Memory Motor Having Field Winding with Magnetization Function in the Rotor2022

    • Author(s)
      K. Yokomichi, R. Tsunata, M. Takemoto and J. Imai
    • Organizer
      the 2022 IEEE Energy Conversion Congress and Exposition (ECCE)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Basic Examination for an Adjustable Field IPM Motor with a Field Adjustment Winding on a Rotor2022

    • Author(s)
      R. Nakazawa, M. Takemoto, S. Ogasawara and K. Orikawa
    • Organizer
      the 2022 IEEE Energy Conversion Congress and Exposition (ECCE)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Comparison of Thermal Characteristics in Various Aspect Ratios of Radial-Flux and Axial-Flux Permanent Magnet Machines2022

    • Author(s)
      R. Tsunata, M. Takemoto, J. Imai, T. Saito and T. Ueno
    • Organizer
      the 2022 IEEE Energy Conversion Congress and Exposition (ECCE)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 集中巻固定子を持つ100,000rpm超高速PMモータの高出力密度化に関する検討 ~積層化した磁石保護リングの磁性・非磁性材料の比較~2022

    • Author(s)
      高井 一光,竹本 真紹,小笠原 悟司,折川幸司
    • Organizer
      電気学会モータドライブ/家電・民生合同研究会
    • Related Report
      2021 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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