基于磁场闪络抑制技术的真空沿面闪络实验研究

Experimental study of vacuum surface flashover based on magnetic flashover inhibition

为解决脉冲功率系统中击穿电压最低的部分,即真空固体绝缘界面,采用磁场闪络抑制技术提高闪络电压,为研究磁场和沿面闪络电压的关系,针对不同介电常数的样品开展了一系列相关实验。实验结果表明:采用电容器对通电螺线管充电产生的脉冲强磁场稳定可靠,并且当施加在绝缘子表面磁场强度为1.1T时,PMMA材料的闪络电压可以提高至1.8倍。

Surface flashover in vacuum is a penetrability discharge phenomenon which occurs at the vacuum-insulator interface.One of the effective ways to increase the surface flashover voltage is magnetic flashover inhibition.In this work,a series of experiments were carried out to find out the relationships between applied magnetic field and surface flashover voltage.The experimental results show that the surface flashover voltage of PMMA can be increased up to 1.8 times by applying a magnetic field of 1.1 T which is perpendicular to the electric field and parallel to the insulator surface.