Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Residual magnetic field profiles and their current density profiles of coated conductors for fast and slow cut-off current operations

  • Sun, J. (Chubu University) ;
  • Tallouli, M. (Chubu University) ;
  • Shyshkin, O. (V. N. Karazin Kharkiv National University) ;
  • Hamabe, M. (Chubu University) ;
  • Watanabe, H. (Chubu University) ;
  • Chikumoto, N. (Chubu University) ;
  • Yamaguchi, S. (Chubu University)
  • Received : 2015.01.20
  • Accepted : 2015.03.17
  • Published : 2015.03.31
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Abstract

Coated conductor is an important candidate for power cable applications due to its high current density. Even for DC power cable transmission, we must study the transport properties of HTS tapes after slow and fast discharge. In order to evaluate relation of the magnetic field with applied current we developed a scanning magnetic field measurements system by employing a Hall probe. This work presents the measurements of the magnetic fields above a coated conductor by varying applied current pattern. In the work, a transport current of 100 A, less than the critical current, is applied to YBCO coated conductor. We measured the residual magnetic field distributions after cut off the transport current with slow and fast operations. The results show differences of the magnetic field profiles and the corresponding current profiles by an inverse solution from the magnetic field measurement between these two operations because of the hysteresis of coated conductor excited by the transport current.

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References

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