电弧的工艺性能很大程度取决于它的电流密度分布,要对电弧电流密度分布进行直接测量目前仍是一个难题。我们在进行磁场再压缩等离子弧的研究中,应用分割阳极和光迹示波器等简单测试手段,并经过必要的数学处理,建立了等离子弧阳极平面电流密度数量场的数学模型。这样电弧电流密度分布的测定方法同样适用于其它非熔化极电弧。 The process performance of an arc is strongly dependent on its current density distribution. It is still a challenge to directly measure the arc current density distribution. In the study of magnetic field recompressing plasma arc, we applied the simple test methods such as dividing anodes and optical trace oscilloscopes, and through the necessary mathematical processing, established the mathematical model of the planar field current density of plasma arc anode. This arc current density distribution method is also applicable to other non-melting pole arc.