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

S. T. Ranecky; H. Watanabe; J. Ogawa; T. Oka; D. Gölden; L. Alff; Y. A. Genenko

doi:10.1088/1361-6668/aa73bc

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

S. T. Ranecky, H. Watanabe, J. Ogawa, T. Oka, D. Gölden, L. Alff, Y. A. Genenko

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

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.

Original language	English
Article number	085005
Journal	Superconductor Science and Technology
Volume	30
Issue number	8
DOIs	https://doi.org/10.1088/1361-6668/aa73bc
Publication status	Published - 2017 Jul 6
Externally published	Yes

Keywords

AC losses
magnetic environments
superconductor strip

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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title = "Experimental and theoretical study of AC losses in variable asymmetrical magnetic environments",

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.",

keywords = "AC losses, magnetic environments, superconductor strip",

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AU - Ranecky, S. T.

AU - Watanabe, H.

AU - Ogawa, J.

AU - Oka, T.

AU - Gölden, D.

AU - Alff, L.

AU - Genenko, Y. A.

PY - 2017/7/6

Y1 - 2017/7/6

N2 - 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.

AB - 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.

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

Abstract

Keywords

ASJC Scopus subject areas

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