Space-resolved modeling of stationary spots on copper vacuum arc cathodes and on composite CuCr cathodes with large grains
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , , |
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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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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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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 |
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1799129954771795968 |