Space-resolved modeling of stationary spots on copper vacuum arc cathodes and on composite CuCr cathodes with large grains

Detalhes bibliográficos
Autor(a) principal: Benilov, Mikhail S.
Data de Publicação: 2013
Outros Autores: Cunha, Mário D., Hartmann, Werner, Kosse, Sylvio, Lawall, Andreas, Wenzel, Norbert
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.13/4544
Resumo: A self-consistent space-resolved numerical model of cathode spots in vacuum arcs is realized on the computational platform COMSOL Multiphysics. The model is applied to the investigation of stationary spots on planar cathodes made of copper or composite CuCr material with large ( 20 µm) chromium grains. The modeling results reveal a well defined spot with a structure, which is in agreement with the general theory of stationary cathode arc spots and similar to that of spots on cathodes of arcs in ambient gas. In the case of CuCr contacts with large chromium grains, spots with currents of the order of tens of amperes on copper coexist with spots on chromium with currents of the order of one or few amperes. The main effect of change of the cathode material from copper to chromium is a reduction of thermal conductivity of the cathode material, which causes a reduction of the radius of the spot and a corresponding reduction of the spot current.
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spelling Space-resolved modeling of stationary spots on copper vacuum arc cathodes and on composite CuCr cathodes with large grainsCathode spotsCircuit breakersComposite cathodesVacuum arcs.Faculdade de Ciências Exatas e da EngenhariaA self-consistent space-resolved numerical model of cathode spots in vacuum arcs is realized on the computational platform COMSOL Multiphysics. The model is applied to the investigation of stationary spots on planar cathodes made of copper or composite CuCr material with large ( 20 µm) chromium grains. The modeling results reveal a well defined spot with a structure, which is in agreement with the general theory of stationary cathode arc spots and similar to that of spots on cathodes of arcs in ambient gas. In the case of CuCr contacts with large chromium grains, spots with currents of the order of tens of amperes on copper coexist with spots on chromium with currents of the order of one or few amperes. The main effect of change of the cathode material from copper to chromium is a reduction of thermal conductivity of the cathode material, which causes a reduction of the radius of the spot and a corresponding reduction of the spot current.Institute of Electrical and Electronics EngineersDigitUMaBenilov, Mikhail S.Cunha, Mário D.Hartmann, WernerKosse, SylvioLawall, AndreasWenzel, Norbert2022-09-01T10:33:36Z2013-01-01T00:00:00Z2013-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.13/4544engBenilov, M. S., Cunha, M. D., Hartmann, W., Kosse, S., Lawall, A., & Wenzel, N. (2013). Space-resolved modeling of stationary spots on copper vacuum arc cathodes and on composite CuCr cathodes with large grains. IEEE Transactions on Plasma Science, 41(8), 1950-1958. DOI: 10.1109/TPS.2013.226325510.1109/TPS.2013.2263255info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-09-05T12:57:53Zoai:digituma.uma.pt:10400.13/4544Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:08:40.333996Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Space-resolved modeling of stationary spots on copper vacuum arc cathodes and on composite CuCr cathodes with large grains
title Space-resolved modeling of stationary spots on copper vacuum arc cathodes and on composite CuCr cathodes with large grains
spellingShingle Space-resolved modeling of stationary spots on copper vacuum arc cathodes and on composite CuCr cathodes with large grains
Benilov, Mikhail S.
Cathode spots
Circuit breakers
Composite cathodes
Vacuum arcs
.
Faculdade de Ciências Exatas e da Engenharia
title_short Space-resolved modeling of stationary spots on copper vacuum arc cathodes and on composite CuCr cathodes with large grains
title_full Space-resolved modeling of stationary spots on copper vacuum arc cathodes and on composite CuCr cathodes with large grains
title_fullStr Space-resolved modeling of stationary spots on copper vacuum arc cathodes and on composite CuCr cathodes with large grains
title_full_unstemmed Space-resolved modeling of stationary spots on copper vacuum arc cathodes and on composite CuCr cathodes with large grains
title_sort Space-resolved modeling of stationary spots on copper vacuum arc cathodes and on composite CuCr cathodes with large grains
author Benilov, Mikhail S.
author_facet Benilov, Mikhail S.
Cunha, Mário D.
Hartmann, Werner
Kosse, Sylvio
Lawall, Andreas
Wenzel, Norbert
author_role author
author2 Cunha, Mário D.
Hartmann, Werner
Kosse, Sylvio
Lawall, Andreas
Wenzel, Norbert
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv DigitUMa
dc.contributor.author.fl_str_mv Benilov, Mikhail S.
Cunha, Mário D.
Hartmann, Werner
Kosse, Sylvio
Lawall, Andreas
Wenzel, Norbert
dc.subject.por.fl_str_mv Cathode spots
Circuit breakers
Composite cathodes
Vacuum arcs
.
Faculdade de Ciências Exatas e da Engenharia
topic Cathode spots
Circuit breakers
Composite cathodes
Vacuum arcs
.
Faculdade de Ciências Exatas e da Engenharia
description A self-consistent space-resolved numerical model of cathode spots in vacuum arcs is realized on the computational platform COMSOL Multiphysics. The model is applied to the investigation of stationary spots on planar cathodes made of copper or composite CuCr material with large ( 20 µm) chromium grains. The modeling results reveal a well defined spot with a structure, which is in agreement with the general theory of stationary cathode arc spots and similar to that of spots on cathodes of arcs in ambient gas. In the case of CuCr contacts with large chromium grains, spots with currents of the order of tens of amperes on copper coexist with spots on chromium with currents of the order of one or few amperes. The main effect of change of the cathode material from copper to chromium is a reduction of thermal conductivity of the cathode material, which causes a reduction of the radius of the spot and a corresponding reduction of the spot current.
publishDate 2013
dc.date.none.fl_str_mv 2013-01-01T00:00:00Z
2013-01-01T00:00:00Z
2022-09-01T10:33:36Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.13/4544
url http://hdl.handle.net/10400.13/4544
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Benilov, M. S., Cunha, M. D., Hartmann, W., Kosse, S., Lawall, A., & Wenzel, N. (2013). Space-resolved modeling of stationary spots on copper vacuum arc cathodes and on composite CuCr cathodes with large grains. IEEE Transactions on Plasma Science, 41(8), 1950-1958. DOI: 10.1109/TPS.2013.2263255
10.1109/TPS.2013.2263255
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Institute of Electrical and Electronics Engineers
publisher.none.fl_str_mv Institute of Electrical and Electronics Engineers
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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