Study on the erosion characteristics of copper‐carbon electrode pairs by DC air arc
Abstract As common electric contact materials, copper‐carbon electrode pairs are widely used in the field of electric contact such as in high‐speed railways, motor collector rings and grounding brushes. They play a key role in energy transmission in the above‐mentioned systems. Arc erosion has becom...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-08-01
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| Series: | High Voltage |
| Subjects: | |
| Online Access: | https://doi.org/10.1049/hve2.12124 |
| _version_ | 1811312961020493824 |
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| author | Wenhan Xie Guangning Wu Zefeng Yang Pengpeng She Hong Wang Haozi Zuo Wenfu Wei Guoqiang Gao Chuanjun Tu |
| author_facet | Wenhan Xie Guangning Wu Zefeng Yang Pengpeng She Hong Wang Haozi Zuo Wenfu Wei Guoqiang Gao Chuanjun Tu |
| author_sort | Wenhan Xie |
| collection | DOAJ |
| description | Abstract As common electric contact materials, copper‐carbon electrode pairs are widely used in the field of electric contact such as in high‐speed railways, motor collector rings and grounding brushes. They play a key role in energy transmission in the above‐mentioned systems. Arc erosion has become a key issue threatening system safety. In this work, a dedicated arc erosion platform was built to study the polarity effect of copper‐carbon electrode pairs. It was found that arc dynamics and electrodes erosion behaviours were significantly different under different polarities, which could be understood from the mechanism of heat transfer, cooling and electron emission of the electrode. Then, when the carbon material was used as an anode, the arc caused carbon transfer: the carbon material sublimated quickly due to electron condensation and thermal conduction and quickly condensed on the low‐temperature metal electrode, while the carbon material transfer could partly inhibit the oxidation of the cathode metal electrode. In addition, the rapid sublimation of the carbon material produced high‐temperature airflow, which would make the arc impedance fluctuate and cause the arc voltage to jump. Finally, the anode heat transfer and cathode cooling mechanism directly affected the material state, and the erosion of the anode material was more serious. |
| first_indexed | 2024-04-13T10:47:07Z |
| format | Article |
| id | doaj.art-88385cdd3050456dafcc49735daae9e1 |
| institution | Directory Open Access Journal |
| issn | 2397-7264 |
| language | English |
| last_indexed | 2024-04-13T10:47:07Z |
| publishDate | 2021-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | High Voltage |
| spelling | doaj.art-88385cdd3050456dafcc49735daae9e12022-12-22T02:49:47ZengWileyHigh Voltage2397-72642021-08-016467468310.1049/hve2.12124Study on the erosion characteristics of copper‐carbon electrode pairs by DC air arcWenhan Xie0Guangning Wu1Zefeng Yang2Pengpeng She3Hong Wang4Haozi Zuo5Wenfu Wei6Guoqiang Gao7Chuanjun Tu8School of Electrical Engineering Southwest Jiaotong University Chengdu Sichuan ChinaSchool of Electrical Engineering Southwest Jiaotong University Chengdu Sichuan ChinaSchool of Electrical Engineering Southwest Jiaotong University Chengdu Sichuan ChinaSchool of Electrical Engineering Southwest Jiaotong University Chengdu Sichuan ChinaSchool of Electrical Engineering Southwest Jiaotong University Chengdu Sichuan ChinaSchool of Electrical Engineering Southwest Jiaotong University Chengdu Sichuan ChinaSchool of Electrical Engineering Southwest Jiaotong University Chengdu Sichuan ChinaSchool of Electrical Engineering Southwest Jiaotong University Chengdu Sichuan ChinaCollege of Materials Science and Engineering Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology Hunan University Changsha Hunan ChinaAbstract As common electric contact materials, copper‐carbon electrode pairs are widely used in the field of electric contact such as in high‐speed railways, motor collector rings and grounding brushes. They play a key role in energy transmission in the above‐mentioned systems. Arc erosion has become a key issue threatening system safety. In this work, a dedicated arc erosion platform was built to study the polarity effect of copper‐carbon electrode pairs. It was found that arc dynamics and electrodes erosion behaviours were significantly different under different polarities, which could be understood from the mechanism of heat transfer, cooling and electron emission of the electrode. Then, when the carbon material was used as an anode, the arc caused carbon transfer: the carbon material sublimated quickly due to electron condensation and thermal conduction and quickly condensed on the low‐temperature metal electrode, while the carbon material transfer could partly inhibit the oxidation of the cathode metal electrode. In addition, the rapid sublimation of the carbon material produced high‐temperature airflow, which would make the arc impedance fluctuate and cause the arc voltage to jump. Finally, the anode heat transfer and cathode cooling mechanism directly affected the material state, and the erosion of the anode material was more serious.https://doi.org/10.1049/hve2.12124anodesarcs (electric)brushescarboncathodescooling |
| spellingShingle | Wenhan Xie Guangning Wu Zefeng Yang Pengpeng She Hong Wang Haozi Zuo Wenfu Wei Guoqiang Gao Chuanjun Tu Study on the erosion characteristics of copper‐carbon electrode pairs by DC air arc High Voltage anodes arcs (electric) brushes carbon cathodes cooling |
| title | Study on the erosion characteristics of copper‐carbon electrode pairs by DC air arc |
| title_full | Study on the erosion characteristics of copper‐carbon electrode pairs by DC air arc |
| title_fullStr | Study on the erosion characteristics of copper‐carbon electrode pairs by DC air arc |
| title_full_unstemmed | Study on the erosion characteristics of copper‐carbon electrode pairs by DC air arc |
| title_short | Study on the erosion characteristics of copper‐carbon electrode pairs by DC air arc |
| title_sort | study on the erosion characteristics of copper carbon electrode pairs by dc air arc |
| topic | anodes arcs (electric) brushes carbon cathodes cooling |
| url | https://doi.org/10.1049/hve2.12124 |
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