講演抄録/キーワード |
講演名 |
2018-11-09 14:25
磁気吹き消し効果のある開離時接点の直流アーク放電に対する電流値と磁束密度の影響 ○吉田 清・眞野健太・澤 孝一郎(日本工大)・鈴木健司(富士電機機器制御) EMD2018-43 エレソ技報アーカイブへのリンク:EMD2018-43 |
抄録 |
(和) |
(まだ登録されていません) |
(英) |
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. |
キーワード |
(和) |
/ / / / / / / |
(英) |
Electrical contacts / Arc discharge / Arc duration / Arc energy / Magnetic blow-out / DC interruption / / |
文献情報 |
信学技報, vol. 118, no. 290, EMD2018-43, pp. 13-19, 2018年11月. |
資料番号 |
EMD2018-43 |
発行日 |
2018-11-02 (EMD) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
PDFダウンロード |
EMD2018-43 エレソ技報アーカイブへのリンク:EMD2018-43 |