具有两级磁阀的消弧线圈关键参数设计

摘要

Design of parameters about magnetic valve is the most critical issue in the design of two-stage magnetic valve arc-suppression coil. The parameters of magnetic valve include the sectional area and the length. Based on the analysis of magnetic valve arc-suppression coil＇s operating current, the formula of fundamental component and the harmonic components in the current are obtained. On this basis, the relationship between the depth of the current regulation, ratio of medium cross section area to the small one, and the magnetic valve＇s saturation level are derived. Integrated from four considerations： the economy, regulation curve continuity, guarantee a certain depth of current regulation, and the lowest harmonic level, a set of design method for the magnetic valve parameters is proposed. Finally, according to this method, the parameters of the laboratory prototype are improved, and the results of comparison between the original parameters and the new parameters are satisfied.%在磁阀式消弧线圈的设计中,磁阀的参数设计是整个消弧线圈设计中最关键的问题,它包括磁阀截面面积和长度的设计。本文通过对磁阀式消弧线圈的工作电流进行解析分析,得到其工作电流基波分量和谐波分量表达式。在此基础上,对电流调节深度、中小磁阀截面配比与饱和度的关系等方面进行了理论推导。从经济性、调节曲线连续性、保证一定的电流调节深度、谐波水平最低这四个方面综合考虑,提出了一套针对磁阀参数的设计方法。最后,根据本文提出的设计方法,对实验室已有样机的参数改进设计,并比较改进前后消弧线圈的谐波水平和工作范围,结果令人满意。