Analysis of AC loss behavior in BSCCO tapes with different core geometries

Mele, R.; Crotti, G.; Gherardi, Laura; Morin, D.; Bigoni, L.; Martini, L.; Zannella, S.

doi:10.1109/77.620820

Cited by 10 publications

(3 citation statements)

References 7 publications

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“…In the case of circular symmetry, a straightforward derivation allows us to extend the model to the case of a hollow conductor (a 'tube'): this is what is commonly called 'monoblock' model. Losses measured on single-core concentric tapes, in fact, did show a good agreement with Norris predictions for an 'elliptical' conductor [5].…”

Section: Transport Behaviour Of Different Tapes: 'Double-ring' Tapessupporting

confidence: 60%

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A.c. losses in Bi-2223 tapes for power applications

Gherardi¹,

Gömöry²,

Mele³

et al. 1997

Supercond. Sci. Technol.

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Improved measuring procedures and interpretation efforts have shown that the critical state model is fully applicable for describing the behaviour of HTS tapes for power applications. By this means, we could consistently analyse magnetic and transport measurements and study possible inhomogeneities and geometrical peculiarities in BSCCO-2223 tapes. Examples of such an analysis are given in this contribution. Losses in multistrand conductors require a more complex modellization and further development of the experimental procedures; the results of a.c. transport measurements on a 13 m long, multilayer, prototype conductor sample are also discussed here.

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Section: Transport Behaviour Of Different Tapes: 'Double-ring' Tapessupporting

confidence: 60%

“…To interpret this behaviour qualitatively, we had previously proposed [5] a simple explanation based on two calculations, one for the regime where only the outer ring was penetrated by the self-field and the other for highest penetration. J c was supposed to be the same for the two rings.…”

Section: Transport Behaviour Of Different Tapes: 'Double-ring' Tapesmentioning

confidence: 99%

A.c. losses in Bi-2223 tapes for power applications

Gherardi¹,

Gömöry²,

Mele³

et al. 1997

Supercond. Sci. Technol.

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“…Numerous studies carried out on mono filament tapes have shown that hysteretic energy dissipation can be accurately measured using a modified fourprobe technique employing a small loop in the voltage leads so that the external magnetic flux in close proximity to the HTS conductor is sampled [2][3][4][5]. In contrast, multi-filament tapes have been studied only briefly [6]. In the first part of this paper therefore we discuss the observed power dissipation in 7, 19, 37 and 49-filament tapes in the frequency range 32-256 Hz.…”

Section: Introductionmentioning

confidence: 99%

Self-field AC Power Dissipation in High-Tc Superconducting Tapes and a Prototype Cable

Awan¹,

Sali²

2002

PIER

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The measured self-field AC power dissipation in superconducting BiSrCaCuO-2223/Ag tapes and a prototype cable is cable is compared with theoretical models. A brief overview of the theoretical background for AC loss calculations in superconductor tapes with different geometrical shapes is also discussed. New models for the harmonic components of the fundamental frequency and the current dependent non-linear inductance are also derived. It is shown that the latter models can be used to estimate current distribution and the variation of flux penetration in superconducting tapes. Two separate experimental apparatus were designed and constructed for measurements on tapes and prototype cable systems. The observed losses in tapes are reasonably well described by models based on the Critical State Model (CSM). In contrast, the measured losses in the prototype cable are found to be a factor of approximately two higher the predicted values. Further investigations showed that this may be due to inhomogeneous contact resistance between individual tapes and the current joints and the variation in critical current density (J C) distribution between tapes. The significance of current dependence of the loss component, inductive quadrature component, phase error in measurements and the definition of the critical current in the prototype cable are also discussed.

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The AC loss of transport current in (Bi,Pb)-2223 superconducting tapes

Yang

et al. 2000

Physica C: Superconductivity

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Analysis of AC loss behavior in BSCCO tapes with different core geometries

Cited by 10 publications

References 7 publications

A.c. losses in Bi-2223 tapes for power applications

A.c. losses in Bi-2223 tapes for power applications

Self-field AC Power Dissipation in High-Tc Superconducting Tapes and a Prototype Cable

The AC loss of transport current in (Bi,Pb)-2223 superconducting tapes

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