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Magnetic flux penetration into twisted multifilamentary coated superconductors subjected to ac transverse magnetic fields
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10.1063/1.2395679
/content/aip/journal/jap/100/12/10.1063/1.2395679
http://aip.metastore.ingenta.com/content/aip/journal/jap/100/12/10.1063/1.2395679

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Model of filaments and groove between filaments: conductive layer comprising superconductor filaments and grooves filled with resistive material with resistivity ( is transverse resistance of groove between two filaments of unit length, is thickness of conductive layer, and is width of groove).

Image of FIG. 2.
FIG. 2.

Schematics of model of twisted multifilamentary coated conductor: (a) top view of one pitch, (b) actual analysis region of finite element model untwisted on flat plane, and (c) coated conductor divided axially into short flat sections and rotated along conductor axis to form twisted geometry.

Image of FIG. 3.
FIG. 3.

Extension of integrated region for source point of self-magnetic-field: source points as far as along axial direction from each field point are taken into consideration.

Image of FIG. 4.
FIG. 4.

Current lines (contours of ) at peak of external magnetic field in conductor with of and of , where is : (a) , (b) , and (c) .

Image of FIG. 5.
FIG. 5.

(Color online) Contours of magnetic flux density component normal to wide face of conductor at peak of external magnetic field in conductor with of and of , where is : (a) , (b) , and (c) .

Image of FIG. 6.
FIG. 6.

Lateral profiles of current and magnetic flux at center of conductor at peak of external magnetic field (lateral sections of Figs. 4 and 5): (a) , (b) , and (c) .

Image of FIG. 7.
FIG. 7.

Overall magnetization losses and loss components vs frequency of external magnetic field, where , , and : is hysteretic loss component, is coupling loss component, and is overall magnetization loss of conductor ; and are magnetization losses at completely decoupled state and completely coupled state, respectively, calculated using one-dimensional model for flat conductor.

Image of FIG. 8.
FIG. 8.

Coupling loss components (a) and overall magnetization losses (b) for various (1, 10, and ) vs frequency of external magnetic field, where and ; and are magnetization losses at completely decoupled state and completely coupled state, respectively, calculated using one-dimensional model for flat conductor.

Image of FIG. 9.
FIG. 9.

Coupling loss components (a) and overall magnetization losses (b) for different (200 and ) vs frequency of external magnetic field, where and ; and are magnetization losses at completely decoupled state and completely coupled state, respectively, calculated using one-dimensional model for flat conductor.

Image of FIG. 10.
FIG. 10.

Overall magnetization losses for various and vs amplitude of external magnetic field, where ; and are magnetization losses of flat multifilamentary coated conductor at completely decoupled state and completely coupled state, respectively, and is magnetization loss of flat monofilament coated conductor calculated using one-dimensional model; is magnetization loss of twisted monofilament conductor calculated using developed model; and are analytical values of magnetization losses of flat multifilamentary coated conductor at completely decoupled state and monofilament coated conductor, respectively, obtained by the formula of Brandt and Indenbom.

Tables

Generic image for table
Table I.

Specifications of twisted multifilamentary coated conductors in the analyses.

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/content/aip/journal/jap/100/12/10.1063/1.2395679
2006-12-22
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magnetic flux penetration into twisted multifilamentary coated superconductors subjected to ac transverse magnetic fields
http://aip.metastore.ingenta.com/content/aip/journal/jap/100/12/10.1063/1.2395679
10.1063/1.2395679
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