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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, Y. A. (2017)
Experimental and theoretical study of AC losses in variable asymmetrical magnetic environments.
In: Superconductor Science and Technology, 30 (8)
doi: 10.1088/1361-6668/aa73bc
Article, Bibliographie

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.

Item Type: Article
Erschienen: 2017
Creators: Ranecky, S. T. ; Watanabe, H. ; Ogawa, J. ; Oka, T. ; Gölden, D. ; Alff, L. ; Genenko, Y. A.
Type of entry: Bibliographie
Title: Experimental and theoretical study of AC losses in variable asymmetrical magnetic environments
Language: English
Date: 6 July 2017
Publisher: IOP Publishing
Journal or Publication Title: Superconductor Science and Technology
Volume of the journal: 30
Issue Number: 8
DOI: 10.1088/1361-6668/aa73bc
URL / URN: https://doi.org/10.1088/1361-6668/aa73bc
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.

Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology
11 Department of Materials and Earth Sciences > Material Science > Materials Modelling
Date Deposited: 11 Dec 2017 11:33
Last Modified: 24 Sep 2018 14:26
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