Wear Mechanism of Current Collecting Materials due to Temperature Distribution Analysis Considering Degenerated Layer

To clarify the wear mechanism of current collecting materials such as a contact wire and a contact strip under electric current condition, it is necessary to clarify temperature distribution around the contact spot. However, the traditional method of estimating the maximum contact temperature such a...

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Autores principales:	Chikara Yamashita, Koshi Adachi
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2019
Materias:	heat conduction equation wiedemann-franz law electric potential distribution temperature distribution degenerated layer wear mechanism Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/401ff6403919473cabf2157034001358
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spelling	oai:doaj.org-article:401ff6403919473cabf21570340013582021-11-05T09:18:04ZWear Mechanism of Current Collecting Materials due to Temperature Distribution Analysis Considering Degenerated Layer1881-219810.2474/trol.14.94https://doaj.org/article/401ff6403919473cabf21570340013582019-06-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/14/2/14_94/_pdf/-char/enhttps://doaj.org/toc/1881-2198To clarify the wear mechanism of current collecting materials such as a contact wire and a contact strip under electric current condition, it is necessary to clarify temperature distribution around the contact spot. However, the traditional method of estimating the maximum contact temperature such as the φ-θ theory cannot estimate the temperature distribution. In this paper, we newly proposed an electric field analysis model of hard-drawn copper and iron-based sintered alloy considering a degenerated layer such as an oxide film and wear debris. Then, we newly proposed the heat conduction equation applying the Wiedemann-Franz law, and analyzed temperature distribution in electrodes. As a result, we find that the relation between the maximum temperature and the contact voltage even in dissimilar electrodes are based on the φ-θ theory. The temperature distribution in electrode changes depending on whether or not degenerated layers exist, and the maximum temperatures of each electrode are not necessarily the same as those estimated by the φ-θ theory. Finally, we clarify the influence of the degenerated layer on the melting condition of electrodes, and explain the electric wear phenomena observed in the previous wear test.Chikara YamashitaKoshi AdachiJapanese Society of Tribologistsarticleheat conduction equationwiedemann-franz lawelectric potential distributiontemperature distributiondegenerated layerwear mechanismPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 14, Iss 2, Pp 94-101 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	heat conduction equation wiedemann-franz law electric potential distribution temperature distribution degenerated layer wear mechanism Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	heat conduction equation wiedemann-franz law electric potential distribution temperature distribution degenerated layer wear mechanism Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Chikara Yamashita Koshi Adachi Wear Mechanism of Current Collecting Materials due to Temperature Distribution Analysis Considering Degenerated Layer
description	To clarify the wear mechanism of current collecting materials such as a contact wire and a contact strip under electric current condition, it is necessary to clarify temperature distribution around the contact spot. However, the traditional method of estimating the maximum contact temperature such as the φ-θ theory cannot estimate the temperature distribution. In this paper, we newly proposed an electric field analysis model of hard-drawn copper and iron-based sintered alloy considering a degenerated layer such as an oxide film and wear debris. Then, we newly proposed the heat conduction equation applying the Wiedemann-Franz law, and analyzed temperature distribution in electrodes. As a result, we find that the relation between the maximum temperature and the contact voltage even in dissimilar electrodes are based on the φ-θ theory. The temperature distribution in electrode changes depending on whether or not degenerated layers exist, and the maximum temperatures of each electrode are not necessarily the same as those estimated by the φ-θ theory. Finally, we clarify the influence of the degenerated layer on the melting condition of electrodes, and explain the electric wear phenomena observed in the previous wear test.
format	article
author	Chikara Yamashita Koshi Adachi
author_facet	Chikara Yamashita Koshi Adachi
author_sort	Chikara Yamashita
title	Wear Mechanism of Current Collecting Materials due to Temperature Distribution Analysis Considering Degenerated Layer
title_short	Wear Mechanism of Current Collecting Materials due to Temperature Distribution Analysis Considering Degenerated Layer
title_full	Wear Mechanism of Current Collecting Materials due to Temperature Distribution Analysis Considering Degenerated Layer
title_fullStr	Wear Mechanism of Current Collecting Materials due to Temperature Distribution Analysis Considering Degenerated Layer
title_full_unstemmed	Wear Mechanism of Current Collecting Materials due to Temperature Distribution Analysis Considering Degenerated Layer
title_sort	wear mechanism of current collecting materials due to temperature distribution analysis considering degenerated layer
publisher	Japanese Society of Tribologists
publishDate	2019
url	https://doaj.org/article/401ff6403919473cabf2157034001358
work_keys_str_mv	AT chikarayamashita wearmechanismofcurrentcollectingmaterialsduetotemperaturedistributionanalysisconsideringdegeneratedlayer AT koshiadachi wearmechanismofcurrentcollectingmaterialsduetotemperaturedistributionanalysisconsideringdegeneratedlayer
_version_	1718444404785545216

Wear Mechanism of Current Collecting Materials due to Temperature Distribution Analysis Considering Degenerated Layer

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