The influence of geometry on self-field AC losses of Ag sheathed PbBi2223 tapes

Yang, Y.; Hughes, T.; Beduz, C.; Spiller, D.M.; Scurlock, R.G.; Norris, W.T.

doi:10.1016/0921-4534(95)00662-1

Cited by 90 publications

(43 citation statements)

References 7 publications

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“…͑1͒ that is derived from the CS model assuming E = 0 when ͉J͉ Ͻ J c . [4][5][6][7] In the present work, we will derive a transport scaling law for the cylinder with PL E͑J͒, so thataccompanied by a set of numerically calculated results-the above mentioned relation is quantitatively obtained and may be conveniently used in the ac loss research of HTS tapes.…”

Section: Alternating Current Loss In a Cylinder With Power-law Currenmentioning

confidence: 99%

Alternating current loss in a cylinder with power-law current-voltage characteristic

Chen

2005

Applied Physics Letters

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The transport ac loss Q in a superconducting cylinder of radius a with a power-law current-voltage characteristic E=Ec∣J∕Jc∣n as a function of current amplitude Im is numerically calculated for a set of given values of a,Jc, and frequency f at n=5, 10, 20, and 30. After deriving a scaling law and defining a critical frequency fc, the results can be converted and interpolated to those for any values of a, Jc, f, and 5⩽n⩽30. The “power-law” Q(Im) at f=fc is a better alternative of the critical-state Q(Im), used not only for describing the features of Q(Im,f) of high-temperature superconductors but also for planning Q measurements and their interpretation.

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Section: Alternating Current Loss In a Cylinder With Power-law Currenmentioning

confidence: 99%

Alternating current loss in a cylinder with power-law current-voltage characteristic

Chen

2005

Applied Physics Letters

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“…It is well documented that the transport AC loss measured on tapes of HTS does not exactly follow either of these two theoretical predictions, derived for a round (or elliptical) wire and for a thin strip [2]- [5]. The reason is that these simple models are not considering the detailed structure and properties of superconductors.…”

Section: Introductionmentioning

confidence: 80%

Study of BSSCO/Ag Tapes With the Help of Voltage Signal Analysis

Klinčok

Gömöry

Dhallé

2007

IEEE Trans. Appl. Supercond.

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Properties of BSSCO/Ag tapes transporting AC current were studied by the Fourier analysis of the accompanying voltage signal. Particularly, the electrical signal in the measurement loop that is used in the standard AC loss measurement has been investigated. BSSCO/Ag tapes were studied starting from the characterization of the filament configuration, ( ) dependence and inhomogeneity of distribution. These data were used as the input parameters for the numerical simulations. Initial simulations showed the necessity of replacing the simplified geometry model with detailed mutlifilamentary structure. Consequently, the higher harmonics turned out to be extremely sensitive on characterization parameters. After such refinement, the results of simulations give good agreement with measured higher harmonics of the voltage signal. This means that the analysis of higher harmonics could provide relevant information about the structure and other basic properties of the measured tape.

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“…In recent studies on 1G high-temperature superconducting (HTS) tapes prepared by the powder-in-silver tube technique, Eq. (1) for thin elliptical tapes has been well verified by both numerical calculations and analytical derivation [4,5]. Norris also derived a formula for a rectangular thin strip [3], and with the same normalization as in Eq.…”

Section: Introductionmentioning

confidence: 87%

“…(1)-(3) [5][6][7][8][9][10][11][12][13][14][15], which means that the CS model is basically valid for such tapes. However, this comparison between experimental and modeling results is somewhat ambiguous, since the relations between current density J and electrical field E in the actual HTS tapes and in the CS model are significantly different.…”

Section: Introductionmentioning

confidence: 99%