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电网技术  2007 

大开距纵磁结构触头磁场特性的数值分析

, PP. 65-70

Keywords: 真空灭弧室,纵向磁场,触头结构,大开距,高压电器

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Abstract:

通过分析几种用于中压真空灭弧室中的触头结构,探讨了将它们应用在高压真空灭弧室中的可能性。并用有限元的方法对单极线圈式和杯状纵向磁场触头结构在大开距条件下的磁场特性进行了仿真计算。采用改变部分触头结构参数的方法来优化磁场分布,在分析计算结果的基础上探讨了将它们应用于高压真空灭弧室中的可行性。结果表明,在大开距条件下即使经过优化,1/3匝线圈式纵磁触头结构和杯状纵磁触头结构所产生的磁场也不足以控制真空电弧,而1/2匝线圈式纵磁触头有较强的纵向磁场,适合于大电流的开断。

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