纯银触头熔桥行为高速摄像研究

发布时间：2017-12-30 19:13

  本文关键词：纯银触头熔桥行为高速摄像研究　出处：《贵金属》2016年S1期 　论文类型：期刊论文

  更多相关文章： 纯银触头 电接触 熔桥 高速摄像

【摘要】：采用自主设计的电接触-高速摄像试验系统,在直流单分断模式下对纯银触头在电接触过程中所发生的熔桥行为进行观测,从而在不同的电流条件下对电接触过程中熔桥的形貌尺寸进行研究,同时通过SEM对电接触熔桥行为作用后纯银触头的表面进行形貌分析。结果表明,在DC 10 V(8~20 A)条件下,纯银触头在电接触过程中形成的熔桥有圆柱型和哑铃型2种形貌,并且其尺寸为微米级;熔桥的直径和长度都随电流的增大而呈现出先减小后增大的趋势,10~15 A范围内纯银触头在电接触过程中不易形成熔桥,电接触过程中电弧可能先于熔桥而产生,并且熔桥和电弧现象可以同时存在。
[Abstract]:Using the self-designed electrical contact-high speed camera test system, the melting bridge behavior of pure silver contacts during electrical contact was observed in DC single break mode. At the same time, the surface morphology of pure silver contact was analyzed by SEM under different current conditions. Under the condition of DC 10 V ~ (8) C ~ (20 A), the fused bridge formed in the electric contact process of pure silver contacts has two morphologies: cylindrical and dumbbell-shaped, and the size of the bridge is of micron order. The diameter and length of the bridge decrease first and then increase with the increase of current. The pure silver contact is not easy to form the fusion bridge in the range of 1015A during electric contact. The arc may occur earlier than the fusion bridge during electric contact, and the melting bridge and arc phenomenon can exist at the same time.
【作者单位】： 昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室;
【分类号】：TM206
【正文快照】： 电触头作为承担接通和分断开关电器电路的核心元件,主要用于继电器、接触器和小型断路器等电接触领域中,其性能好坏直接影响开断容量、使用寿命和运行可靠性[1-3]。贵金属电接触材料具有较高的导电和导热性、高化学稳定性、低而稳定的接触电阻、高抗熔焊性和抗电弧侵蚀等优良，

本文编号：1356095