Experimental and theoretical study of AC losses in variable asymmetrical magnetic environments
| Autor: | Lambert Alff, Jun Ogawa, Yuri A. Genenko, Tetsuo Oka, S. T. Ranecky, Dominik Gölden, H. Watanabe |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Condensed Matter - Superconductivity Metals and Alloys Shields FOS: Physical sciences 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology Condensed Matter Physics Magnetic hysteresis 01 natural sciences law.invention Superconductivity (cond-mat.supr-con) Permeability (electromagnetism) law Magnet Condensed Matter::Superconductivity 0103 physical sciences Electromagnetic shielding Materials Chemistry Ceramics and Composites Eddy current Electrical and Electronic Engineering 010306 general physics 0210 nano-technology |
| DOI: | 10.48550/arxiv.1705.05193 |
| Popis: | Measurements of AC losses in a HTS-tape placed in between of 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 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. Comment: 13 pages, 4 figures |
| Databáze: | OpenAIRE |
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