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Experimental and theoretical study of AC losses in variable asymmetrical magnetic environments

Ranecky, S. T. ; Watanabe, H. ; Ogawa, J. ; Oka, T. ; Gölden, D. ; Alff, L. ; Genenko, Yuri A. :
Experimental and theoretical study of AC losses in variable asymmetrical magnetic environments.
[Online-Edition: https://doi.org/10.1088/1361-6668/aa73bc]
In: Superconductor Science and Technology, 30 (8) 085005-(6pp). ISSN 0953-2048
[Artikel], (2017)

Offizielle URL: https://doi.org/10.1088/1361-6668/aa73bc

Kurzbeschreibung (Abstract)

Measurements of AC losses in a HTS-tape placed in between two bulk magnetic shields of high permeability were performed by applying calorimetric techniques for various asymmetrical shielding arrangements. The experiment was supported by analytical calculations and finite-element simulations of the field and current distributions, based on the Bean model of the critical state. The simulated current and field profiles perfectly reproduce the analytic solutions known for certain shielding geometries. The evaluation of the consequent AC losses exhibits good agreement with measurements for the central position of the tape between the magnets but have increasing discrepancy when the tape is approaching the shields. This can be explained by the increasing contribution of the eddy currents and magnetic hysteresis losses in the conducting shields.

Typ des Eintrags: Artikel
Erschienen: 2017
Autor(en): Ranecky, S. T. ; Watanabe, H. ; Ogawa, J. ; Oka, T. ; Gölden, D. ; Alff, L. ; Genenko, Yuri A.
Titel: Experimental and theoretical study of AC losses in variable asymmetrical magnetic environments
Sprache: Englisch
Kurzbeschreibung (Abstract):

Measurements of AC losses in a HTS-tape placed in between two bulk magnetic shields of high permeability were performed by applying calorimetric techniques for various asymmetrical shielding arrangements. The experiment was supported by analytical calculations and finite-element simulations of the field and current distributions, based on the Bean model of the critical state. The simulated current and field profiles perfectly reproduce the analytic solutions known for certain shielding geometries. The evaluation of the consequent AC losses exhibits good agreement with measurements for the central position of the tape between the magnets but have increasing discrepancy when the tape is approaching the shields. This can be explained by the increasing contribution of the eddy currents and magnetic hysteresis losses in the conducting shields.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Superconductor Science and Technology
Band: 30
(Heft-)Nummer: 8
Freie Schlagworte: superconductor strip, magnetic environments, AC losses
Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialmodellierung
Hinterlegungsdatum: 24 Aug 2017 10:22
Offizielle URL: https://doi.org/10.1088/1361-6668/aa73bc
ID-Nummer: doi:10.1088/1361-6668/aa73bc
Sponsoren: Support from the Scholarship Program of Japanese Student Services Organization is gratefully acknowledged.
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