The investigation of sweeping speed on the magnetization of a 2 inches diameter YBa2Cu3O7-δ thin film with the circular-type magnetic flux pump

W. Wang, R. Semerad, F. Spaven, M. Zhang, C. H. Hsu, Z. Zhong, Y. Chen, Z. Huang, T. A. Coombs

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10 Citations (Scopus)

Abstract

A circular-type magnetic flux pump (CTMFP) device was built to study the flux dynamics on a 2-inch-diameter YBCO thin film. This CTMFP is composed of two CTMFP coils, with each CTMFP coil containing concentric three-phase windings and a dc winding. We connected the three-phase windings to the output of a commercial inverter. By changing the output frequency of the inverter, the sweeping speed of the circular-shaped travelling magnetic wave can be changed. The connection of the phase coils follows the forward consequence, so that the circular-shaped travelling magnetic wave travels inward to the center. The output frequency f was changed from f = 0.01 to 1000.0 Hz. The YBCO sample was sandwiched between the two CTMFP coils to experience the circular-shaped travelling magnetic wave. It was found that the increase of the flux density in the center of the film is independent of the sweeping frequency. In high frequency f = 1000.0Hz, even if the waveform had changed a lot, the increment is still the same as in low frequencies.

Original languageEnglish
Article number6401174
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume23
Issue number3
DOIs
Publication statusPublished - 11 Feb 2013

Keywords

  • high-temperature superconductors
  • superconducting thin films
  • three-phase electric power
  • type II superconductors
  • magnetic flux
  • coils
  • yttrium barium copper oxide
  • superconducting magnets

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