AC loss characteristics of YBCO coated conductors with Ag protection layer

Ogawa, J.; Nakayama, Hiroyuki; Odaka, S.; Tsukamoto, O.

doi:10.1016/j.physc.2004.01.123

Cited by 33 publications

(19 citation statements)

References 5 publications

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“…Such deviations have been reported previously, and one of the possible causes is a non-uniform lateral J c distribution [13]. It is important to note that the Q m of these monolithic samples is almost frequency independent.…”

Section: Resultssupporting

confidence: 71%

AC Loss Characterization of Striated Multifilamentary YBCO Coated Conductors

Amemiya¹

2005

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Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. The transverse resistances between filaments in the measured samples were determined through the comparison between the measured and calculated magnetization losses at small field amplitude. The magnetization losses calculated in a wide range of field amplitude using these transverse resistances reasonably agree with the measured magnetization losses. SUBJECT TERMS

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Section: Resultssupporting

confidence: 71%

AC Loss Characterization of Striated Multifilamentary YBCO Coated Conductors

Amemiya¹

2005

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“…This is consistent with the estimate Figure 12 shows t e 111. 9 Hz data for all three tested patterns. The brick , Fig.…”

Section: µM (B) (A)mentioning

confidence: 99%

Magnetization losses in multiply connected YBa2Cu3O6+x-coated conductors

Levin

Barnes

Amemiya

et al. 2005

Journal of Applied Physics

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Abstract.We report the results of a magnetization losses study in experimental multifilament, multiply connected coated superconductors exposed to time-varying magnetic field. In these samples, the superconducting layer is divided into parallel stripes segregated by non-superconducting grooves. In order to facilitate the current sharing between the stripes and thus increase the reliability of the striated conductors, a sparse network of superconducting bridges is superimposed on the striated film. We find that the presence of the bridges does not substantially increase the magnetization losses, both hysteresis and coupling, as long as the number of bridges per length of the sample is not large. These results indicate that it is possible to find a reasonable compromise between the competing requirements of connectivity and loss reduction in an ac-tolerant version of the high temperature coated conductors specifically designed for ac power applications.

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“…This was a reason to expect lower AC loss of YBCO tapes in comparison to BiSCCO ones. Measurements of the AC losses due to transport currents show higher loss than theoretical works predict [3,4]. This may be caused by several reasons -inhomogeneity of YBCO layer, interaction between superconductor and ferromagnetic substrate, and by contribution of hysteretic losses in the substrate to total loss of the tape.…”

Section: Introductionmentioning

confidence: 81%

Influence of DC Magnetic Field on AC Loss of YBCO Coated Conductor with Ferromagnetic Substrate

et al. 2008

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Most of YBCO tape conductors are prepared on a ferromagnetic substrate. The ferromagnetic material is then exposed to the self magnetic field of the superconductor and also to external magnetic field. In AC magnetic field hysteretic and eddy current losses are generated in the substrate. In this work the AC transport loss of an YBCO coated conductor on a ferromagnetic substrate was measured using electromagnetic method. There are two contributions to total loss -a loss in the superconductor and a loss in the substrate. To suppress the hysteretic loss in the substrate, it is possible to saturate it using DC magnetic field. In this regime significant decrease in total loss was observed.

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AC loss characteristics of YBCO coated conductors with Ag protection layer

Cited by 33 publications

References 5 publications

AC Loss Characterization of Striated Multifilamentary YBCO Coated Conductors

AC Loss Characterization of Striated Multifilamentary YBCO Coated Conductors

Magnetization losses in multiply connected YBa2Cu3O6+x-coated conductors

Influence of DC Magnetic Field on AC Loss of YBCO Coated Conductor with Ferromagnetic Substrate

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