Novel design of the structure of a non-inductive superconducting coil

Min Cheol Ahn, Jae Young Jang, Tae Kuk Ko, Haigun Lee

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


A non-inductive coil is an essential element of a resistive superconducting fault current limiter (FCL). A bifilar pancake type non-inductive coil, which is most common type, has two drawbacks; difficulty of paralleling tapes and a high risk of electrical breakdown at the terminal part. Although the bifilar type is simple as an element, large-scale FCL needs quite a number of series and parallel connections between elements. To make a non-inductive coil using conventional inductive elementary coils, we propose a novel structure of the coil. It looks like a toroid but entire inductance is near zero. This coil can overcome the drawbacks of conventional bifilar coil. In this paper, we confirm the new concept by numerical analyses. A few kinds of new models are compared, and then we concluded the proposed toroidal shape one is most suitable. This new structure coil can help implement of a hybrid FCL which is to generate the magnetic field at only fault.

Original languageEnglish
Article number5675700
Pages (from-to)1250-1253
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number3 PART 2
Publication statusPublished - 2011 Jun


  • Hybrid FCL
  • Non-inductive coil
  • Toroid

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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