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A new benchmark problem for electromagnetic modelling of superconductors: the high-T$_{c}$ superconducting dynamo

Ainslie, Mark; Grilli, Francesco; Quéval, Loïc; Pardo, Enric; Perez-Mendez, Fernando; Mataira, Ratu; Morandi, Antonio; Ghabeli, Asef; Bumby, Chris; Brambilla, Roberto

The high-T$_{c}$ superconducting (HTS) dynamo is a promising device that can inject large DC supercurrents into a closed superconducting circuit. This is particularly attractive to energise HTS coils in NMR/MRI magnets and superconducting rotating machines without the need for connection to a power supply via current leads. It is only very recently that quantitatively accurate, predictive models have been developed which are capable of analysing HTS dynamos and explain their underlying physical mechanism. In this work, we propose to use the HTS dynamo as a new benchmark problem for the HTS modelling community. The benchmark geometry consists of a permanent magnet rotating past a stationary HTS coated-conductor wire in the open-circuit configuration, assuming for simplicity the 2D (infinitely long) case. Despite this geometric simplicity the solution is complex, comprising time-varying spatially-inhomogeneous currents and fields throughout the superconducting volume. In this work, this benchmark problem has been implemented using several different methods, including H-formulation-based methods, coupled H-A and T-A formulations, the Minimum Electromagnetic Entropy Production method, and integral equation and volume integral equation-based equivalent circuit methods. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000123320
Veröffentlicht am 04.09.2020
DOI: 10.1088/1361-6668/abae04
Zitationen: 13
Web of Science
Zitationen: 9
Zitationen: 14
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Technische Physik (ITEP)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 10.2020
Sprache Englisch
Identifikator ISSN: 0953-2048, 1361-6668
KITopen-ID: 1000123320
HGF-Programm 37.06.02 (POF III, LK 01) New Power Network Technology
Erschienen in Superconductor science and technology
Verlag IOP Publishing
Band 33
Heft 10
Seiten Article: 105009
Vorab online veröffentlicht am 31.08.2020
Schlagwörter HTS dynamo, flux pump, coated conductor, numerical simulation, HTS modelling, high temperature superconductors
Nachgewiesen in Web of Science
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