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

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 contac...

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Published inPlasma science & technology Vol. 18; no. 5; pp. 512 - 519
Main Author 崔行磊 周学 翟国富 彭喜元
Format Journal Article
LanguageEnglish
Published 01.05.2016
Subjects
Arc heating
Breaking
Contact
Direct current
Evaporation
Evaporation rate
Mathematical models
Relay
侵蚀特性
断开
气体动力学
电弧模型
电流密度
继电器
蒸发速率
触头
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ISSN1009-0630
DOI10.1088/1009-0630/18/5/12

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Summary: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.
Bibliography: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.
School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
evaporation erosion, material transfer, molten pool, simplified arc model
34-1187/TL
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1009-0630
DOI:10.1088/1009-0630/18/5/12