3D modeling of a superconducting dynamo-type flux pump

Abstract High temperature superconducting (HTS) dynamos are promising devices that can inject large DC currents into the winding of superconducting machines or magnets in a contactless way. Thanks to this, troublesome brushes in HTS machines or bulky currents leads with high thermal losses will be n...

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Autores principales:	Asef Ghabeli, Enric Pardo, Milan Kapolka
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8887168d5e97445cb9382b32e66f48df
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spelling	oai:doaj.org-article:8887168d5e97445cb9382b32e66f48df2021-12-02T17:15:32Z3D modeling of a superconducting dynamo-type flux pump10.1038/s41598-021-89596-42045-2322https://doaj.org/article/8887168d5e97445cb9382b32e66f48df2021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-89596-4https://doaj.org/toc/2045-2322Abstract High temperature superconducting (HTS) dynamos are promising devices that can inject large DC currents into the winding of superconducting machines or magnets in a contactless way. Thanks to this, troublesome brushes in HTS machines or bulky currents leads with high thermal losses will be no longer required. The working mechanism of HTS dynamo has been controversial during the recent years and several explanations and models have been proposed to elucidate its performance. In this paper, we present the first three-dimensional (3D) model of an HTS flux pump, which has good agreement with experiments. This model can be beneficial to clarify the mechanism of the dynamo and pinpoint its unnoticed characteristics. Employing this model, we delved into the screening current and electric field distribution across the tape surface in several crucial time steps. This is important, since the overcritical screening current has been shown to be the reason for flux pumping. In addition, we analyzed the impact of both components of electric field and screening current on voltage generation, which was not possible in previous 2D models. We also explored the necessary distance of voltage taps at different airgaps for precise measurement of the voltage across the tape in the dynamo.Asef GhabeliEnric PardoMilan KapolkaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Asef Ghabeli Enric Pardo Milan Kapolka 3D modeling of a superconducting dynamo-type flux pump
description	Abstract High temperature superconducting (HTS) dynamos are promising devices that can inject large DC currents into the winding of superconducting machines or magnets in a contactless way. Thanks to this, troublesome brushes in HTS machines or bulky currents leads with high thermal losses will be no longer required. The working mechanism of HTS dynamo has been controversial during the recent years and several explanations and models have been proposed to elucidate its performance. In this paper, we present the first three-dimensional (3D) model of an HTS flux pump, which has good agreement with experiments. This model can be beneficial to clarify the mechanism of the dynamo and pinpoint its unnoticed characteristics. Employing this model, we delved into the screening current and electric field distribution across the tape surface in several crucial time steps. This is important, since the overcritical screening current has been shown to be the reason for flux pumping. In addition, we analyzed the impact of both components of electric field and screening current on voltage generation, which was not possible in previous 2D models. We also explored the necessary distance of voltage taps at different airgaps for precise measurement of the voltage across the tape in the dynamo.
format	article
author	Asef Ghabeli Enric Pardo Milan Kapolka
author_facet	Asef Ghabeli Enric Pardo Milan Kapolka
author_sort	Asef Ghabeli
title	3D modeling of a superconducting dynamo-type flux pump
title_short	3D modeling of a superconducting dynamo-type flux pump
title_full	3D modeling of a superconducting dynamo-type flux pump
title_fullStr	3D modeling of a superconducting dynamo-type flux pump
title_full_unstemmed	3D modeling of a superconducting dynamo-type flux pump
title_sort	3d modeling of a superconducting dynamo-type flux pump
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/8887168d5e97445cb9382b32e66f48df
work_keys_str_mv	AT asefghabeli 3dmodelingofasuperconductingdynamotypefluxpump AT enricpardo 3dmodelingofasuperconductingdynamotypefluxpump AT milankapolka 3dmodelingofasuperconductingdynamotypefluxpump
_version_	1718381269848424448

3D modeling of a superconducting dynamo-type flux pump

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