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Evaluation of a solid nitrogen impregnated MgB2 racetrack coil

Journal Article


Abstract


  • To develop powerful wind turbine generators using superconducting technology, highperformance

    superconducting racetrack coils are essential. Herein, we report an evaluation of a

    multifilamentary magnesium diboride (MgB2) conductor-based racetrack coil cooled and

    impregnated simultaneously by solid nitrogen (SN2). The coil was wound on a copper former

    with 13 mm winding width, an inner diameter of 124 mm at the curvature, and 130 mm length of

    the straight section. An in situ processed S-glass-insulated 36-filament MgB2 wire was wound on

    the former in two layers with 19.5 turns, and heat treated via the wind and react method without

    any epoxy resin. The coil was evaluated for critical temperature and transport critical current in

    the SN2 environment at different temperatures up to 31.3 K in self-field. The coil was able to

    carry 200 A transport current at 28.8 K in self-field. During coil charging and operation, SN2

    effectively acted as an impregnation material. The test results demonstrate the viability to use

    MgB2 racetrack coil potentially with SN2 impregnation in advanced rotating machine

    applications.

Authors


  •   Patel, Dipakkumar (external author)
  •   Qiu, Wenbin (external author)
  •   Mustapic, Mislav (external author)
  •   Knott, Jonathan C.
  •   Ma, Zongqing (external author)
  •   Gajda, Daniel (external author)
  •   Shahabuddin, Mohammed (external author)
  •   Xu, Jianyi (external author)
  •   Choi, Seyong (external author)
  •   Tomsic, Mike (external author)
  •   Dou, Shi Xue
  •   Yamauchi, Yusuke (external author)
  •   Kim, Jung Ho
  •   Hossain, Md Shahriar

Publication Date


  • 2018

Citation


  • Patel, D., Qiu, W., Mustapic, M., Knott, J. C., Ma, Z., Gajda, D., Shahabuddin, M., Xu, J., Choi, S., Tomsic, M., Dou, S. Xue., Yamauchi, Y., Kim, J. Ho. & Hossain, M. Al. (2018). Evaluation of a solid nitrogen impregnated MgB2 racetrack coil. Superconductor Science & Technology, 31 (10), 105010-1-105010-8.

Scopus Eid


  • 2-s2.0-85053430439

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3265

Has Global Citation Frequency


Start Page


  • 105010-1

End Page


  • 105010-8

Volume


  • 31

Issue


  • 10

Place Of Publication


  • United Kingdom

Abstract


  • To develop powerful wind turbine generators using superconducting technology, highperformance

    superconducting racetrack coils are essential. Herein, we report an evaluation of a

    multifilamentary magnesium diboride (MgB2) conductor-based racetrack coil cooled and

    impregnated simultaneously by solid nitrogen (SN2). The coil was wound on a copper former

    with 13 mm winding width, an inner diameter of 124 mm at the curvature, and 130 mm length of

    the straight section. An in situ processed S-glass-insulated 36-filament MgB2 wire was wound on

    the former in two layers with 19.5 turns, and heat treated via the wind and react method without

    any epoxy resin. The coil was evaluated for critical temperature and transport critical current in

    the SN2 environment at different temperatures up to 31.3 K in self-field. The coil was able to

    carry 200 A transport current at 28.8 K in self-field. During coil charging and operation, SN2

    effectively acted as an impregnation material. The test results demonstrate the viability to use

    MgB2 racetrack coil potentially with SN2 impregnation in advanced rotating machine

    applications.

Authors


  •   Patel, Dipakkumar (external author)
  •   Qiu, Wenbin (external author)
  •   Mustapic, Mislav (external author)
  •   Knott, Jonathan C.
  •   Ma, Zongqing (external author)
  •   Gajda, Daniel (external author)
  •   Shahabuddin, Mohammed (external author)
  •   Xu, Jianyi (external author)
  •   Choi, Seyong (external author)
  •   Tomsic, Mike (external author)
  •   Dou, Shi Xue
  •   Yamauchi, Yusuke (external author)
  •   Kim, Jung Ho
  •   Hossain, Md Shahriar

Publication Date


  • 2018

Citation


  • Patel, D., Qiu, W., Mustapic, M., Knott, J. C., Ma, Z., Gajda, D., Shahabuddin, M., Xu, J., Choi, S., Tomsic, M., Dou, S. Xue., Yamauchi, Y., Kim, J. Ho. & Hossain, M. Al. (2018). Evaluation of a solid nitrogen impregnated MgB2 racetrack coil. Superconductor Science & Technology, 31 (10), 105010-1-105010-8.

Scopus Eid


  • 2-s2.0-85053430439

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3265

Has Global Citation Frequency


Start Page


  • 105010-1

End Page


  • 105010-8

Volume


  • 31

Issue


  • 10

Place Of Publication


  • United Kingdom