开关触头的熔池尺寸

Theoretical Study to the Size of Molten Pool on Switch Contact

开关触头在电弧高温的作用下 ,产生熔池 ,继而发生喷溅 ,是电弧侵蚀的重要方式之一。通过计算触头温度场 ,分析了影响触头熔池尺寸的因素。结果表明 ,热流功率P和分断时刻t0

During a switch's work time, the high temperature forms a molten pool on its surface and that results in the ejection of the contact material, which is considered as one of the important ways to arc erosion. In this paper, by computation of the temperature field, many factors that affect the size of molten pool were analyzed. The results show that the thermal power P and the current intercept moment t 0 affect the size of the molten pool obviously.