Magnetic Shielding Performance Evaluation of Dewar System for High-Temperature Superconducting Machines
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Le résumé fourni par la source
For high-temperature superconducting-based electrical machines, the magnetic shielding performance of Dewar system has become one of the most attractive research topics in electromagnetic compatibility (EMC) practice and applications. The unknown or inaccurate knowledge about the electromagnetic properties of Dewar materials, as well as the limitations of experimental configurations, e.g., background interference, low temperature, and enclosed structures, has made it difficult to evaluate the magnetic shielding performance of Dewar. Here we propose a simple method for measuring the shielding performance of Dewar at low frequency range (below 1 kHz), and also provide a prediction of the shielding performance at low temperature (273 K, 76 K and 20 K). To minimize the impact of background noise, the closed shielding chamber, e.g., the reverberation chamber (RC) made of galvanized steel plates, is used as a testing facility in which the measurement configuration is performed, taking into account the magnetic field that may affect the superconducting magnets. To verify the measurement method, the COMSOL Multiphysics 6.0 is employed, and comparisons have confirmed that the experimental results follow the numerical simulation with very good repeatability and very small uncertainty (less than 0.9 dB for 40 Hz – 1 kHz). By using the temperature-dependent conductivity, the shielding performance has been predicted at low temperature (e.g., 273 K, 76 K and 20 K), being regarded as an alternative estimate of the experimental results that are not easily obtained for the actual Dewar module.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Magnetic Shielding Performance Evaluation of Dewar System for High-Temperature Superconducting Machines
- Date Crossref
- 15/01/2026
- Éditeur
- Institute of Electrical and Electronics Engineers (IEEE)
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Nanjing University of Aeronautics and Astronautics pays non établi dans la noticeUniversité ou école supérieure
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Southeast University Research Center for Electromagnetic Environmental Effects pays non établi dans la noticeUniversité ou école supérieure
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Zhengzhou University pays non établi dans la noticeUniversité ou école supérieure
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North China Electric Power University Department of Electric Power Engineering pays non établi dans la noticeUniversité ou école supérieure
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College of Electronic and Information Engineering pays non établi dans la noticeUniversité ou école supérieure
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School of Electrical and Information Engineering pays non établi dans la noticeUniversité ou école supérieure
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School of Electrical Engineering pays non établi dans la noticeUniversité ou école supérieure
Nanjing University of Aeronautics and Astronautics, Research Center for Electromagnetic Environmental Effects — Southeast University et Zhengzhou University, avec 4 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.