Study of single pulsed-field magnetization of Gd-Ba-Cu-O bulk high-temperature superconductor with a split type of armature coil for rotating machinery

E. Morita, H. Matsuzaki, Y. Kimura, I. Ohtani, H. Ogata, M. Izumi, Y. Nonaka, Masato Murakami, T. Ida, H. Sugimoto, M. Miki, M. Kitano

Research output: Contribution to journalArticle

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Abstract

We employed a Gd-bulk HTS as rotating field magnet poles aiming for a smaller and lighter axial-gap-type motor. The bulk was inserted in the split-type armature pulsed copper coils and cooled down to 77 K under zero field. Employing the bulk magnet to HTS rotating machinery, the number of pulsed field magnetizations should be reduced for practical use. Thereby, a single pulsed current was applied to the pulsed copper coils to magnetize the bulk. The trapped field distribution and transient flux behaviour strongly depend on the radial dimension of the armature coil with a vortex-type winding. On decreasing the diameter of the pulsed copper armature coil, the distribution of the trapped flux density on the surface of the bulk becomes close to a conical shape. In contrast to the use of a solenoid, the application of vortex-type armature coils to magnetization of Gd-bulk HTS shows a quick intervention of the external magnetic flux into the centre of the bulk. The magnetization to the bulk HTS of the vortex-type copper coils with an optimum radius is useful and may be an effective technique for applied bulk HTS for rotating machines such as motors and/or generators.

Original languageEnglish
JournalSuperconductor Science and Technology
Volume19
Issue number7
DOIs
Publication statusPublished - 2006 Jul

Fingerprint

armatures
Rotating machinery
High temperature superconductors
machinery
high temperature superconductors
Copper
Magnetization
coils
magnetization
Vortex flow
Magnets
copper
vortices
Fluxes
Solenoids
magnets
Magnetic flux
Poles
solenoids
magnetic flux

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Study of single pulsed-field magnetization of Gd-Ba-Cu-O bulk high-temperature superconductor with a split type of armature coil for rotating machinery. / Morita, E.; Matsuzaki, H.; Kimura, Y.; Ohtani, I.; Ogata, H.; Izumi, M.; Nonaka, Y.; Murakami, Masato; Ida, T.; Sugimoto, H.; Miki, M.; Kitano, M.

In: Superconductor Science and Technology, Vol. 19, No. 7, 07.2006.

Research output: Contribution to journalArticle

Morita, E. ; Matsuzaki, H. ; Kimura, Y. ; Ohtani, I. ; Ogata, H. ; Izumi, M. ; Nonaka, Y. ; Murakami, Masato ; Ida, T. ; Sugimoto, H. ; Miki, M. ; Kitano, M. / Study of single pulsed-field magnetization of Gd-Ba-Cu-O bulk high-temperature superconductor with a split type of armature coil for rotating machinery. In: Superconductor Science and Technology. 2006 ; Vol. 19, No. 7.
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AU - Izumi, M.

AU - Nonaka, Y.

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