Rotational Motion of Break Arcs Driven by Radial Magnetic Field in a DC Resistive Circuit
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概要
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Break arcs are generated between silver electrical contacts in a DC 42V-10A resistive circuit. Break arcs are driven by the radial magnetic field. The magnetic field is formed between the electrical contacts with the permanent magnet embedded in the cathode. The arc motion is taken with the high-speed camera and the contact surfaces arc observed after break operations. Experimental results with the magnet are compared with those without the magnet. Following results are shown for break operations with the magnet. Break arcs are rotationally driven by the radial magnetic field in the direction according to Lorentz force. The shortening effect of the arc duration is conformed. The traces of the arc spots on the contact surfaces are ring-shaped, wide and uniform. This result shows the prevention effect of local erosion of electrical contacts.
- 社団法人電子情報通信学会の論文
- 2008-11-08
著者
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Kubono Takayoshi
Faculty Of Engineering Shizuoka Univ.
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Sekikawa Junya
Faculty Of Engineering And Design Kyoto Institute Of Technology
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