Evaporation Erosion During the Relay Contact Breaking Process Based on a Simplified Arc Model

CUI Xinglei (崔行磊); ZHOU Xue (周学); ZHAI Guofu (翟国富); PENG Xiyuan (彭喜元)

doi:10.1088/1009-0630/18/5/12

Plasma Science and Technology > 2016 > 18(5): 512-519. > DOI: 10.1088/1009-0630/18/5/12

CUI Xinglei (崔行磊), ZHOU Xue (周学), ZHAI Guofu (翟国富), PENG Xiyuan (彭喜元). Evaporation Erosion During the Relay Contact Breaking Process Based on a Simplified Arc Model[J]. Plasma Science and Technology, 2016, 18(5): 512-519. DOI: 10.1088/1009-0630/18/5/12

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Evaporation Erosion During the Relay Contact Breaking Process Based on a Simplified Arc Model

School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China

Funds: supported by National Natural Science Foundation of China (Nos. 51377038, 51307030)

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Received Date: September 08, 2015

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Abstract

Abstract

Evaporation erosion of the contacts is one of the fundamental failure mechanisms for relays. In this paper, the evaporation erosion characteristics are investigated for the copper contact pair breaking a resistive direct current (dc) 30 V/10 A circuit in the air. Molten pool simulation of the contacts is coupled with the gas dynamics to calculate the evaporation rate. A simplified arc model is constructed to obtain the contact voltage and current variations with time for the prediction of the current density and the heat flux distributions flowing from the arc into the contacts. The evaporation rate and mass variations with time during the breaking process are presented. Experiments are carried out to verify the simulation results.
- evaporation erosion,
- material transfer,
- molten pool,
- simplified arc model

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References

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