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High-performance conductors and coils used for superconducting power machines cooled by liquid nitrogen

Research Project

Project/Area Number 14350149
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 電力工学・電気機器工学
Research InstitutionKagoshima University

Principal Investigator

SUMIYOSHI Fumio  Kagoshima Univ., Faculty of Eng., Professor, 工学部, 教授 (20136526)

Co-Investigator(Kenkyū-buntansha) KAWABATA Shuma  Kagoshima Univ., Faculty of Eng., Associate Professor, 工学部, 助教授 (00244260)
KAWAGOE Akifumi  Kagoshima Univ., Faculty of Eng., Research Associate, 工学部, 助手 (40315396)
Project Period (FY) 2002 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥14,900,000 (Direct Cost: ¥14,900,000)
Fiscal Year 2004: ¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2003: ¥5,000,000 (Direct Cost: ¥5,000,000)
Fiscal Year 2002: ¥6,300,000 (Direct Cost: ¥6,300,000)
Keywordshigh temperature superconductor / tape / conductor / coil / loss / electromagnetic property / poynting vector / power applocation
Research Abstract

In order to realize superconducting power machines cooled by liquid nitrogen, superconducting conductors and coils wound with them are required to have high performance. The purposes of this study are as follows :
(1)Development of new systems to measure electromagnetic properties of long and large superconducting conductors under various conditions of external magnetic fields and transport currents, which is based on our original 'Poynting vector method' adequate for short, straight tape samples, (2)Clarification of electromagnetic properties of Bi-2223 tapes in large conductors wound into coils, and (3)The most suitable design of superconductors as the winding of high performance coils.
The feature of this study is constructions of two original equipments of measuring the above mentioned properties. Completed Equipment 1 can be measured Poynting vectors at both inner and outer surfaces of single layered, solenoidal coils wound with long Bi-2223 tapes or concuctors. By using this Equipment 1, the loss properties of this sample coil under the simultaneous sweep of external transverse magnetic fields and transport currents are clarified experimentally at liquid nitrogen temperature. On the other hand, Equipment 2 is also completed ; in this equipment a pair of straight large sample conductors with high current capacities is set inside NbTi split magnets cooled in liquid helium and the temperature of the sample can be changed as 4.2K, 66K or 77K. By using this Equipment 2, inter-strand coupling losses produced in Bi-2212 Rutherford cables with large current capacities are not so serious compared with large hysteresis losses. The coupling time constant of this cable is about 10msec. This result comes from metallurgical treatments of Bi-2212 strand surfaces before heat treatment.

Report

(4 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (21 results)

All 2005 2004 2003 2002 Other

All Journal Article (15 results) Publications (6 results)

  • [Journal Article] Indirect Measurement of AC Current Distributions in a Bi-2223 Solenoidal Coil by a Pickup Coil Method2005

    • Author(s)
      Shuma Kawabata
    • Journal Title

      IEEE Trans.Appl.Supercond. (to be published)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Development of New Conductors of the Cable-in-Conduit Type for HTS Coils with High Performances2005

    • Author(s)
      Akifumi Kawagoe
    • Journal Title

      IEEJ Trans.PE Vol.124, No.10

      Pages: 1186-1192

    • NAID

      210000184400

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Indirect Measurement of AC Current Distributions in a Bi-2223 Solenoidal Coil by a Pickup Coil Method2005

    • Author(s)
      Shuma Kawabata
    • Journal Title

      IEEE Trans.Appl.Supercond (to be published)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Indirect Measurement of AC Current Distributions in a Bi-2223 Solenoidal Coil by a Pickup Coil Method2005

    • Author(s)
      Shuma Kawabata
    • Journal Title

      IEEE Trans.Appl.Supercomd. (to be published)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] AC losses in long Bi-2223 tapes wound into a solenoidal-coil2004

    • Author(s)
      Hirofumi Kasahara
    • Journal Title

      IEEE Trans.Appl.Supercond. 14-2

      Pages: 1078-1081

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 高温超伝導コイルの高性能化を目指す新しいケーブル・イン・コンジット型導体の開発2004

    • Author(s)
      川越明史
    • Journal Title

      電気学会論文誌B 124-10

      Pages: 1186-1192

    • NAID

      10013639794

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] AC losses in long Bi-2223 tapes wound into a solenoidal-coil2004

    • Author(s)
      Hirofumi Kasahara
    • Journal Title

      IEEE Trans.Appl.Supercond Vol.14, No.2

      Pages: 1078-1081

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 高温超伝導コイルの高性能化を目指す新しいケーブル・イン・コンジット型導体の開発2004

    • Author(s)
      川越明史
    • Journal Title

      電気学会論文誌B 124・10

      Pages: 1186-1192

    • NAID

      10013639794

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Poynting vector method : ac loss measurement of long HTS tapes or wires wound into a solenoidal-coil2003

    • Author(s)
      Fumio Sumiyoshi
    • Journal Title

      IEEE Trans.Appl.Supercond. 13-2

      Pages: 3663-3666

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Bi-2223転位並列導体を捻って内挿したCIC型導体の臨界電流特性2003

    • Author(s)
      若松秀宗
    • Journal Title

      電気学会超伝導応用電力機器研究会資料

      Pages: 29-32

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Current capacity of a Bi-2223 CIC-type conductor within a transposed parallel cable with biased cross section2003

    • Author(s)
      Fumio Sumiyoshi
    • Journal Title

      Proc.of EUCAS-2003

      Pages: 2420-2426

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Poynting vector method : ac loss measurement of long HTS tapes or wires wound into a solenoidal-coilI2003

    • Author(s)
      Fumio Sumiyoshi
    • Journal Title

      IEEE Trans.Appl.Supercond. vol.13, No.2

      Pages: 3663-3666

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Critical current properties of CICC inset the Bi-2223 transposed parallel conductor with twist angles around its axis2003

    • Author(s)
      Hidemne Wakamatsu
    • Journal Title

      IEEJ, The Papers of Technical Meeting on Application of Superconductivity

      Pages: 29-32

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Development of Bi-2223 coils without degradation due to face-on oriented magnetic fields applied to wound tapes2002

    • Author(s)
      Fumio Sumiyoshi
    • Journal Title

      Physica C 372-376

      Pages: 1402-1405

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Development of Bi-2223 coils without degradation due to face-on oriented magnetic fields applied to wound tapes2002

    • Author(s)
      Fumio Sumiyoshi
    • Journal Title

      Physica C Vol.372-376

      Pages: 1402-1405

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Publications] 若松 秀宗: "Bi-2223転位並列導体を捻って内挿したCIC型導体の臨界電流特性"電気学会超伝導応用電力機器研究会資料. 29-32 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] F.Sumiyoshi: "Current capacity of a Bi-2223 CIC-type conductor within a transposed parallel cable with biased cross section"Proc.of EUCAS-2003. (to be published). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Hirofumi Kasahara: "AC losses in long Bi-2223 tapes wound into a solenoidal-coil"IEEE Trans.Appl.Supercond.. (to be published). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 松下 照男: "超伝導応用の基礎"米田出版. 353 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Fumio Sumiyoshi: "Development of Bi-2223 coils without degradation due to face-on oriented magnetic fields applied to wound tapes"Physica C. 372-376. 1402-1405 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] F.Sumiyoshi: "Poynting vector method : ac loss measurement of long HTS tapes or wires wound into a solenoidal-coil"IEEE Trans. Appl. Supercond.. (to be Published). (2003)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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