Scaling law of fringe fields as functions of stored energy and maximum magnetic field for SMES configurations

T. Hamajima, T. Yagai, N. Harada, M. Tsuda, H. Hayashi, T. Ezaki

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Although a SMES (Superconducting Magnetic Energy Storage System) has attractive potential for power management and quality control, the fringe field from the SMES restricts its site location. The fringe field outside a coil is expanded in a series of Legendre polynomials. The results are applied to the fringe fields of various SMES configurations, such as a single solenoid coil, toroidal coil, axially displaced coil. The derived fringe fields are scaled as functions of both the stored energy E and the maximum magnetic field B m, which are the main parameters of superconducting coil design. The fringe fields decrease as E/Bm, (E(n+2)/B (2n+1))1/3, and (E5/Bm 7)1/3, for a single solenoid, toroidal coll, and axially-displaced coil configurations, respectively, where n is the number of coils.

Original languageEnglish
Pages (from-to)705-708
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume14
Issue number2
DOIs
Publication statusPublished - 2004 Jun
Externally publishedYes

Keywords

  • Fringe field
  • Legendre polynomials
  • Maximum field
  • SMES
  • Stored energy

ASJC Scopus subject areas

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

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