Effects of Contact Materials on Rotational Motion of Break Arcs Driven by Radial Magnetic Field
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概要
- 論文の詳細を見る
Break arcs are generated between electrical contacts in a DC 42V resistive circuit. Contact materials are Ag/SnO_2 and Ag/ZnO. Circuit current when contacts are closed is varied from 5A to 21A. The radial magnetic field to drive break arcs is formed between the contact gap with a permanent magnet embedded in the cathode. The arc motion is observed with a high-speed camera. Experimental results with the magnet are compared with those without the magnet. Following results are shown. Similar experimental results to pure silver contacts are obtained for Ag/SnO_2 and Ag/ZnO contact pairs. The rotational motion of the break arcs and the shortening effect of the arc duration are conformed. The ring-shaped, wide and uniform traces are observed on the contact surfaces after break operations. This result shows the prevention effect of local erosion of electrical contacts and the reduction of total amount of contact erosion.
- 社団法人電子情報通信学会の論文
- 2009-11-12
著者
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Kubono Takayoshi
Faculty Of Engineering Shizuoka Univ.
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SEKIKAWA Junya
Faculty of Engineering, Shizuoka University
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Sekikawa Junya
Faculty Of Engineering And Design Kyoto Institute Of Technology
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