| Presentation | 2022-03-04 Effect of inductance and magnetic blowout on DC arc discharge when contacts opened Yuuto Waragai, Kiyoshi Yoshida, Koichiro Sawa, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | DC current switching has been getting important as DC grid systems and electrical vehicles have been more popular. As well-known, DC switching is more difficult than AC switching due to no zero point of load current. So, a magnetic blow-out is generally used to extinguish arc discharge. In that case, arc duration becomes maximum at a lower current than the rated one. It is called Critical load current. In this paper, the effect of load inductance on arc characteristics including the critical load current is examined for W and Ag contacts at three opening speeds. As a result, it can be made clear that the maximum arc duration at small current becomes longer than that of resistive load, especially for inductive load condition of time constant 2 ms, while the effect of load inductance is not large for 100V, 30A circuit condition in case of no magnetic blow-out. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Arc discharge, / Electric contact / DC shutdown / Electromagnetic contactor / Magnet blowout / Inductance |
| Paper # | EMD2021-20 |
| Date of Issue | 2022-02-25 (EMD) |
| Conference Information | |
| Committee | EMD |
|---|---|
| Conference Date | 2022/3/4(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Short NOTE |
| Chair | Yoshiki Kayano(Univ. of Electro-Comm.) |
| Vice Chair | |
| Secretary | (Nippon Inst. of Tech.) |
| Assistant | Yuichi Hayashi(ＮＡＩＳＴ) / Kazuaki Miyanaga(Fujitsu Component) |
| Paper Information | |
| Registration To | Technical Committee on Electromechanical Devices |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Effect of inductance and magnetic blowout on DC arc discharge when contacts opened |
| Sub Title (in English) | |
| Keyword(1) | Arc discharge, |
| Keyword(2) | Electric contact |
| Keyword(3) | DC shutdown |
| Keyword(4) | Electromagnetic contactor |
| Keyword(5) | Magnet blowout |
| Keyword(6) | Inductance |
| 1st Author's Name | Yuuto Waragai |
| 1st Author's Affiliation | Nippon Institute of technology(NIT) |
| 2nd Author's Name | Kiyoshi Yoshida |
| 2nd Author's Affiliation | Nippon Institute of technology(NIT) |
| 3rd Author's Name | Koichiro Sawa |
| 3rd Author's Affiliation | Nippon Institute of technology(NIT) |
| Date | 2022-03-04 |
| Paper # | EMD2021-20 |
| Volume (vol) | vol.121 |
| Number (no) | EMD-405 |
| Page | pp.pp.31-36(EMD), |
| #Pages | 6 |
| Date of Issue | 2022-02-25 (EMD) |