Alternating-current losses in silver-sheathed (Bi,Pb)2Sr2Ca2Cu3O10 tapes II: Role of interfilamentary coupling

Fukumoto, Y.; Wiesmann, H. J.; Garber, M.; Suenaga, M.; Haldar, Pradeep

doi:10.1063/1.115155

Cited by 36 publications

(23 citation statements)

References 1 publication

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“…For larger B a and larger oJ, more and more filaments will be saturated with their critical current. Finally, the filaments are fully coupled: the entire core of the conductor behaves like one large filament [16]. The onset of full coupling can be predicted by comparing the conductor's critical current to the total coupling current in the outer filaments, which can be calculated from the electric field distributions given in Ref.…”

Section: Inter-filament Couplingmentioning

confidence: 99%

Magnetic ac loss in multi-filamentary Bi-2223 / Ag tapes

Oomen

Rieger

Leghissa

et al. 1997

Physica C: Superconductivity

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The ac loss in high-T c superconducting tapes with twisted and non-twisted filaments has been studied by a magnetic method. A brief overview of the theoretical background and the experimental set-up is presented. Measurements were made at 77 K in a magnetic field of 50 Hz frequency and 0.001-0.7 T amplitude. Application of dc transport current made it possible to distinguish between the loss components, arising from intra-grain and from filament currents. The magnitude of the filament loss component indicates that the filaments are fully coupled, which agrees with theory. In other measurements, the orientation of the external field with respect to the tape was varied. Knowledge of the ac loss in parallel and in perpendicular field is sufficient to predict the ac loss for any intermediate orientations of the field. © 1997 Elsevier Science B.V.

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Section: Inter-filament Couplingmentioning

confidence: 99%

Magnetic ac loss in multi-filamentary Bi-2223 / Ag tapes

Oomen

Rieger

Leghissa

et al. 1997

Physica C: Superconductivity

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“…As the filaments are twisted-to ensure equal current distribution field and reduced coupling loss-there is a finite loop area between the filaments for all directions of magnetic field [5]. Currents are induced in the filaments around each loop area and the current transfer between the filaments at the cross over points through the matrix.…”

Section: Discussionmentioning

confidence: 99%

AC Loss and Current Distribution Measurement for Superconducting Tapes

Famakinwa

Fukuwa

Suzuki

et al. 2004

IEEE Trans. Appl. Supercond.

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We made a co-axial copper tube measurement device in order to measure AC losses of HTS tapes. This device can minimize the external disturbance for high accuracy measurement. Also it is easy to fix the tape inside the copper tube. We used a linear amplifier in order to measure the voltage in high accuracy because the transport current was large. The voltage taps are located at the center and the edge of the tapes to measure the voltage drop on the samples. Our experimental data show that the inductive voltages are proportional to the frequency, and therefore this means that the main loss depends on hysteresis loss. In this study, the AC loss characteristics of twisted Bi-2223 tapes and untwisted tapes carrying AC transport current in self field is investigated. The magnetic flux generated by the transport current flowing in the HTS tape can be measured by using the same experimental setup. If the superconducting filament is twisted to reduce the AC losses, a relatively higher magnetic flux is induced at low frequencies, this is measured by winding the measuring wire around the tape-winding pick up method.

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“…We apply the model to two different cases of filament connection: when the filaments are all interconnected or when they are isolated from each other. For AC loss reduction the latter is the preferred one [2], [11], although the former is often encountered in practice when there are filaments with a high number of intergrowths [12], [13] or when coupling currents through the conducting matrix are of the same magnitude as the superconducting currents [11], [14], [15].…”

Section: Modelmentioning

confidence: 99%

Theoretical AC susceptibility of superconducting multifilamentary tapes in a perpendicular field

Pardo

Sanchez

Navau

2003

IEEE Trans. Appl. Supercond.

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We study theoretically the AC susceptibility of hard type-II superconducting multifilamentary tape when placed in a perpendicular AC magnetic field. We focus on three different arrangements of identical filaments of rectangular cross-section: three filaments stacked in the applied field direction (vertical array), three filaments aligned in the field perpendicular direction (horizontal array), and the case of a 3 3 filament matrix. Real and imaginary AC susceptibility are calculated within the critical state framework. For the geometries of horizontal array and matrix are studied the cases whether the critical current returns inside each filament or it returns to the other filament placed symmetrically in the horizontal direction.

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Alternating-current losses in silver-sheathed (Bi,Pb)2Sr2Ca2Cu3O10 tapes II: Role of interfilamentary coupling

Cited by 36 publications

References 1 publication

Magnetic ac loss in multi-filamentary Bi-2223 / Ag tapes

Magnetic ac loss in multi-filamentary Bi-2223 / Ag tapes

AC Loss and Current Distribution Measurement for Superconducting Tapes

Theoretical AC susceptibility of superconducting multifilamentary tapes in a perpendicular field

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