自愈式低压电容器金属化薄膜的应用研究

Applicative Study of Metallized Thin Film of Self-healing Low-voltage Parallel Capacitors

自愈式低压电容器在运行一段时间后会出现减容,大部分电容器元件可在保护动作时退出运行,个别元件击穿后无法退出运行,甚至出现着火等情况。通过对损坏电容器的芯子连接、元件金属化膜的解剖,以及对金属化膜卷绕的元件进行一系列方阻、膜厚等相应试验,提出了自愈式低压电容器金属化膜的改进方法。

Self-healing low-voltage capacitors often experience capacity reduction after practically operating for a certain duration.Most of the capacitor components can be appropriately switched-off upon protection actions,and in severe cases,some components get breakdown or even burning.In view of this the present work carried out dissection of core connections and component metallization films with respect to damaged capacitors,and a series of corresponding tests such as square resistance and film thickness on the components wound with metallized films.As a result the methods of enhancing the metallized films of self-healing low-voltage capacitors have been put forward.