Numerical analysis of a.c. losses in superconductors

H. Hashizume, Toshihiko Sugiura, K. Miya, Y. Ando, S. Akita, S. Torii, Y. Kubota, T. Ogasawara

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

A two-dimensional computational code to evaluate a.c. losses in superconductors has been developed using the current vector potential method (T-method), where the vector potential T is defined by {down triangle, open} × T = J. The current distributions in both superconductors and normal conductors are calculated while changing the conductivity of the superconductor so that the current density never exceeds the critical current density. The hysteresis and coupling losses evaluated by the numerical code agree with analytical solutions, as far as these are available. In order to verify the validity of the code, an experiment to measure the hysteresis and coupling losses was carried out using Nb-Ti/Cu filaments. The total loss evaluated from the numerical code agrees with that from the experiment. The numerical analysis, however, indicates that the hysteresis loss under quasi-steady magnetic field is less than the loss in the superconductor under transient field.

Original languageEnglish
Pages (from-to)601-606
Number of pages6
JournalCryogenics
Volume31
Issue number7
DOIs
Publication statusPublished - 1991
Externally publishedYes

Fingerprint

Superconducting materials
numerical analysis
Numerical analysis
Hysteresis
hysteresis
current density
vector currents
current distribution
triangles
critical current
filaments
Current density
conductors
Experiments
Magnetic fields
conductivity
magnetic fields

Keywords

  • a.c. losses
  • hysteresis
  • superconductors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Hashizume, H., Sugiura, T., Miya, K., Ando, Y., Akita, S., Torii, S., ... Ogasawara, T. (1991). Numerical analysis of a.c. losses in superconductors. Cryogenics, 31(7), 601-606. https://doi.org/10.1016/0011-2275(91)90057-4

Numerical analysis of a.c. losses in superconductors. / Hashizume, H.; Sugiura, Toshihiko; Miya, K.; Ando, Y.; Akita, S.; Torii, S.; Kubota, Y.; Ogasawara, T.

In: Cryogenics, Vol. 31, No. 7, 1991, p. 601-606.

Research output: Contribution to journalArticle

Hashizume, H, Sugiura, T, Miya, K, Ando, Y, Akita, S, Torii, S, Kubota, Y & Ogasawara, T 1991, 'Numerical analysis of a.c. losses in superconductors', Cryogenics, vol. 31, no. 7, pp. 601-606. https://doi.org/10.1016/0011-2275(91)90057-4
Hashizume, H. ; Sugiura, Toshihiko ; Miya, K. ; Ando, Y. ; Akita, S. ; Torii, S. ; Kubota, Y. ; Ogasawara, T. / Numerical analysis of a.c. losses in superconductors. In: Cryogenics. 1991 ; Vol. 31, No. 7. pp. 601-606.
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