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Simulation research of the electromagnetic characteristic of vacuum arc

机译：真空电弧电磁特性的仿真研究

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Vacuum arc is the unified and balanced plasma coupled by multi-physics field, such as flow field, thermal field, electric field and magnetic field. Obviously, the electromagnetic parameters of vacuum arc, especially the high-current vacuum arc, will impact its flowing status and temperature distribution. In this paper, we studied the electromagnetic characteristic of vacuum arc based on an improved MHD model established in the previous research work. Firstly, the spatial distribution of azimuthal magnetic field strength and electromagnetic force were calculated. Then, the influence of the electromagnetic force on the flow of vacuum arc was analyzed in detail. Finally, according to the numerical results, the axial current densities of vacuum arc with different axial magnetic field were discussed. The research work contributes to optimize the external axial magnetic field to improve the breaking capacity of VCBs.
机译：真空电弧是由多个物理场耦合的统一且平衡的等离子体，例如流场，热场，电场和磁场。显然，真空电弧的电磁参数，特别是大电流真空电弧，将影响其流动状态和温度分布。在本文中，我们基于先前研究工作中建立的改进的MHD模型，研究了真空电弧的电磁特性。首先，计算了方位磁场强度和电磁力的空间分布。然后，详细分析了电磁力对真空电弧流的影响。最后，根据数值结果，讨论了不同轴向磁场下真空电弧的轴向电流密度。该研究工作有助于优化外部轴向磁场，以提高VCB的断裂能力。

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