弓网系统接触电阻特性

Characterization of contact resistance between pantograph and catenary system

针对不同接触压力、牵引电流条件下弓网系统的静态和动态接触电阻进行试验研究。研究结果表明:弓网静态接触时接触电阻随接触压力、牵引电流增大而减小;动态时,接触压力和牵引电流一定的情况下,接触电阻随着列车速度的增加呈现出先增大再减少又增大的趋势,接触电阻随速度变化出现2个极值,说明接触压力与列车运行速度和牵引电流存在着最佳匹配关系。

The static and dynamic contact resistance was studied with different contact pressures and traction currents. The results show that the static contact resistance of pantograph and centenary is decreased when contact pressure and traction current increases, and the dynamic contact resistance increases then decreases and at last increases with the increase of the locomotive speed at the same contact pressure and traction current. This causes two extremum points to contact resistance, which shows that there exist best matching among contact force, the locomotive speed and traction current.