| Presentation | 2018-11-09 Characteristics of arc duration at breaking contacts for low DC current with magnetic blow-out effect Kiyoshi Yoshida, Kenta Mano, Koichiro Sawa, Kenji Suzuki, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | It is well-known that magnetic blow-out is an very useful method to extinguish quickly arc discharge at interrupting DC load current. Using this method, arc column is pulled out apart from contact gap by Lorentz force and disappears quickly. Therefore, very short contact gap is only needed. However, it is reported that arc duration at small DC current becomes longer than that at larger current. In this report, we carried out two experiments. The first is about the magnitude of flux density applied and the effect of contact opening speed on arc duration. The second is at the current range of less than 30A the relation between arc duration and closed circuit current is investigated for silver Ag and tungsten W contacts. Consequently, arc duration becomes the minimum value at the current of 10A for Ag and W contacts and magnetic blow-out 10mT. Further the arc duration becomes very long around the current 3A, and in means that the magnetic blow-out is not effective at such low current. On the other hand, with the magnetic blow-out 25mT, the arc duration has the minimum value around 10A, but the difference of arc duration at the range of 1A to 30A is not large and the arc duration is short compared with the case of 10mT. It suggests that the magnetic blow-out is effective at the whole range of tested current. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Electrical contactsArc dischargeArc durationArc energyMagnetic blow-outDC interruption |
| Paper # | EMD2018-43 |
| Date of Issue | 2018-11-02 (EMD) |
| Conference Information | |
| Committee | EMD |
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| Conference Date | 2018/11/9(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | The University of Electro-Communications |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | International Session IS-EMD2018 |
| Chair | Shinichi Wada(TMC System) |
| Vice Chair | Yoshiki Kayano(Univ. of Electro-Comm.) |
| Secretary | Yoshiki Kayano(Muroran Inst. of Tech.) |
| Assistant | Yuichi Hayashi(ＮＡＩＳＴ) |
| Paper Information | |
| Registration To | Technical Committee on Electromechanical Devices |
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| Language | ENG-JTITLE |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Characteristics of arc duration at breaking contacts for low DC current with magnetic blow-out effect |
| Sub Title (in English) | |
| Keyword(1) | Electrical contactsArc dischargeArc durationArc energyMagnetic blow-outDC interruption |
| 1st Author's Name | Kiyoshi Yoshida |
| 1st Author's Affiliation | Nippon Institute of Technology(NIT) |
| 2nd Author's Name | Kenta Mano |
| 2nd Author's Affiliation | Nippon Institute of Technology(NIT) |
| 3rd Author's Name | Koichiro Sawa |
| 3rd Author's Affiliation | Nippon Institute of Technology(NIT) |
| 4th Author's Name | Kenji Suzuki |
| 4th Author's Affiliation | Fuji Electric FA Components & Systems(Fuji Electric FA Components & Systems) |
| Date | 2018-11-09 |
| Paper # | EMD2018-43 |
| Volume (vol) | vol.118 |
| Number (no) | EMD-290 |
| Page | pp.pp.13-19(EMD), |
| #Pages | 7 |
| Date of Issue | 2018-11-02 (EMD) |