Low loss conductors for power applications

Friend, C.M.; Spiller, D.M.; Huang, Yibing; Martínez, Elena

doi:10.1109/77.920294

Cited by 8 publications

(6 citation statements)

References 10 publications

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“…where (4) Here is assumed to be zero, is given by (5) and is defined as (in this particular case about an order of magnitude smaller than ). In the low limit, as , leading to a (as compared to the of the usual situation).…”

Section: B Hysteresic Lossesmentioning

confidence: 99%

Hysteretic loss vs. filament width in thin YBCO films near the penetration field

Sumption¹,

Lee²,

Cobb

et al. 2003

IEEE Trans. Appl. Supercond.

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Magnetization vs. applied field measurements ( -loops) were taken on YBCO thin films with filaments patterned into them. The YBCO was deposited onto LaAlO 3 substrates using PLD, and the filaments were formed by laser ablation.-loops were taken at 4.2 K in fields up to 9 T using a vibrating sample magnetometer technique, the field applied perpendicular to the film width, . The losses were seen to be greatly reduced by filament width reductions following the standard expression 10. The penetration field was also well described by the standard "high field" expression = (0 4 ) ln( + 1), where is the film thickness. The regimes of applicability of the loss expression were investigated, in particular near . A more general form of the loss equation was obtained and compared with the high-field approximation. The result was that although still increased in proportion to , the rate of increase decreased as approached .Index Terms-AC loss, hysteretic loss, penetration field, YBCO.

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Section: B Hysteresic Lossesmentioning

confidence: 99%

Hysteretic loss vs. filament width in thin YBCO films near the penetration field

Sumption¹,

Lee²,

Cobb

et al. 2003

IEEE Trans. Appl. Supercond.

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show abstract

“…However, the architecture presently being developed for high temperature superconducting (HTS) coated conductors is primarily for dc environments [3][4][5][6]. The YBCO films used in coated conductors are characterized by high aspect ratios, with widths up to a centimeter compared to thicknesses in the range of 0.3 to several lm.…”

Section: Introductionmentioning

confidence: 99%

Hysteretic loss reduction in striated YBCO

Cobb

Barnes

Haugan

et al. 2002

Physica C: Superconductivity

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“…Presently, considerable research efforts are directed toward the development of novel Bi-2223/Ag wires with round or square configuration [1], [2]. One of the expected advantages of these new conductors is minimizing the effect of the geometry Manuscript received August 5, 2002.…”

Section: Introductionmentioning

confidence: 99%

AC losses of multifilamentary Bi-2223/Ag conductors with different geometry and filament arrangement

Stavrev

Dutoit

Lombard³

2003

IEEE Trans. Appl. Supercond.

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This paper presents results from numerical modeling of nontwisted multifilamentary Bi-2223/Ag conductors with various geometry and filament arrangement. Anisotropic models of ( ) and ( ) have been employed in finite element method simulations under different operating conditions -with applied ac transport current, in external parallel and perpendicular ac magnetic field, and with combined current and field of varying orientation. AC losses and current distributions in square and round Bi-2223/Ag wires with different filament arrangement have been calculated and compared to those of a 7-filamentary tape. It is demonstrated that the shape factor of the conductors and the orientation of the local magnetic field with respect to the individual filaments are of primary importance for the ac loss magnitude in different applications. Outlined are the advantages of using conductors with specific filament configuration for a given application.

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Low loss conductors for power applications

Cited by 8 publications

References 10 publications

Hysteretic loss vs. filament width in thin YBCO films near the penetration field

Hysteretic loss vs. filament width in thin YBCO films near the penetration field

Hysteretic loss reduction in striated YBCO

AC losses of multifilamentary Bi-2223/Ag conductors with different geometry and filament arrangement

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