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Operando measurement and modeling of current transport properties for high-temperature superconducting tapes with a wide-range of electric-field window

Research Project

Project/Area Number 22K20430
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 InstitutionKyushu University

Principal Investigator

Wu Zeyu  九州大学, システム情報科学研究院, 助教 (40962147)

Project Period (FY) 2022-08-31 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords電流輸送特性 / 磁気顕微法 / 超低電界領域 / 高温超伝導線材 / 非破壊・非接触計測 / モデリング / 低電界領域
Outline of Research at the Start

高温超伝導テープ線材は定常高磁界の発生や交流モーター等への応用が期待されている。しかしながら、幅広のテープ形状に起因して、コイルによる磁場発生時に超伝導テープ面内に大きな遮蔽電流が誘起される。遮蔽電流の挙動は、線材の電流輸送特性:電界―電流密度(E-J)特性に帰結されるが、運転時の線材に誘起される電界は10-12 ~ 10-2 V/mと10桁に亘るほど広く、温度や磁界、更に磁界の印加角度なども大きく異なることから、線材の輸送可能な電流密度が複雑に変化する。本研究では、実用環境下の特性を計測すると共に、物理モデルを導入した深層学習によってE-J特性の高精度なモデリングを実現しようとするものである。

Outline of Final Research Achievements

High-temperature superconducting tapes are potential for AC and DC applications, which correspond to a wide-range of electric-field window from 10-2 ~ 10-11 V/m. In this study, we developed the method of operando measurement and modeling for current transport properties with a wide-range window of electric-field.
We carried out integrated measurements, including current-voltage transport measurements by four-probe method, and dynamics of magnetic field by time-resolved magnetic microscopy. We finally succeeded in obtaining electric-field versus current-density characteristics with continuous electric-field window from 10-2 ~ 10-11 V/m.Besides, the measurement results could also be described by a numerical model considering the statical behaviours of magnetic flux very well. These achievements support that this research has succeeded in building fundamental technique to clarify current transport properties with a wide-range window of electric-field.

Academic Significance and Societal Importance of the Research Achievements

MRIやNMRの高磁界直流マグネットや核融合炉用大型マグネット、さらに交流モーター用巻線など、直流から交流に至る複雑な実用環境におかれる際に、高温超伝導線材の電磁現象を理解するのに広い電界領域に亘る電流輸送特性の解明が不可欠となる。本研究によって、10-2 ~ 10-11 V/m電界領域における電流輸送特性の実測およびそのモデリングにかかる手法を開発した。また、特定な応用環境に対応した材料開発のためにも基盤技術という位置づけとして重要な貢献が期待できる。

Report

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

    (7 results)

All 2023 2022

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (6 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Continuous Measurement on Electric-Field Versus Current-Density Characteristics of REBCO Coated Conductors in the Electric-Field Window From 10-2 Down to 10-11 V/m2023

    • Author(s)
      Wu Zeyu、Higashikawa Kohei、Kiss Takanobu
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 33 Issue: 5 Pages: 1-5

    • DOI

      10.1109/tasc.2023.3258375

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] 磁気計測による積層 REBCO テープの E-J 特性評価2023

    • Author(s)
      呉 澤宇,鄭 依城, 東川 甲平,木須 隆暢
    • Organizer
      第105回 低温工学・超電導学会研究発表会
    • Related Report
      2023 Annual Research Report
  • [Presentation] High-resolution Detection of Localized Jc inhomogeneity in long-length REBCO Coated Conductor by Combining Magnetic Microscopy and Deep Learning-based Object Detection2023

    • Author(s)
      Zeyu Wu, Kohei Higashikawa, Natthawirot Somjaijaroen, Kazutaka Imamura, Takanobu Kiss
    • Organizer
      MT-28 International Conference on Magnet Technology
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 磁化緩和測定に基づいた高温超伝導線材の電流輸送特性の非接触・非破壊評価法2023

    • Author(s)
      呉 澤宇、東川甲平、木須隆暢
    • Organizer
      九州パワーアカデミーフォーラム2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] リール式磁気顕微鏡を用いたダイナミック磁化測定による長尺 REBCO テープ線材の局所電界―電流密度特性の連続測定に関する検討2023

    • Author(s)
      呉 澤宇,田中 佑斗,東川 甲平,木須 隆暢
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Continuous Measurement on Electric-field versus Current-density Characteristics in the Electric-field Window from 10-2 down to 10-11 V/m2022

    • Author(s)
      Zeyu Wu, Kohei Higashikawa, Takanobu Kiss
    • Organizer
      Applied Superconductivity Conference 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Realization of Wide-range Measurement on Electric-field versus Current-density Characteristics from 10-5 V/m down to 10-11 V/m Based on Hall-probe Magnetic Microscopy2022

    • Author(s)
      WU Zeyu, KISHIKAWA Sohki, HIGASHIKAWA Kohei, KISS Takanobu
    • Organizer
      第104回 低温工学・超電導学会研究発表会
    • Related Report
      2022 Research-status Report

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

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