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IEICE TRANSACTIONS on Electronics

Experimental Study on Root Profile of Molten Bridge under Different Current at Low Opening Speed

Xinyun ZHANG, Xue ZHOU, Xinglei CUI, Rui LI, Guofu ZHAI

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Summary :

To study the molten bridge phenomenon of contacts at the initial breaking process, an experimental device of molten bridge between slowly opening contacts was developed. The system consists of the contact moving control module, the circuit load and the observation module. The molten bridge of copper contact under two load conditions 9 V/19 A and 9 V/7.3 A were studied. The voltage and current characteristics curves of Cu molten bridge were extracted and the resistance and the instantaneous power of the molten bridge were analyzed. The image of the Cu molten bridge diameter was captured by CCD under 9 V/19 A and the influences of the contact force and the separation speed on the molten bridge length and the crater diameter of the anode were studied. The root profile of the Cu contacts after separation was analyzed by digital microscope. Research results show that the Cu molten bridge length has the same changing trend as the diameter of the anode crater. They both decrease with the increment of the separation speed and the decrement of the contact force.

Publication
IEICE TRANSACTIONS on Electronics Vol.E97-C No.9 pp.867-872
Publication Date
2014/09/01
Publicized
Online ISSN
1745-1353
DOI
10.1587/transele.E97.C.867
Type of Manuscript
Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices (IS-EMD2013))
Category

Authors

Xinyun ZHANG
  Harbin Institute of Technology
Xue ZHOU
  Harbin Institute of Technology
Xinglei CUI
  Harbin Institute of Technology
Rui LI
  Harbin Institute of Technology
Guofu ZHAI
  Harbin Institute of Technology

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