Corona discharge is a method widely used in industrial processes for charging insulating films, non-woven media, or granular materials. Its efficiency is assessed by the high level and the homogeneity of the electric charge distribution at the surface of the exposed bodies. The aim of this work is to evaluate the charging efficiency of a new multi-wire corona electrode. Several geometrical parameters have been taken into consideration, more specifically the number of wires and the distance between any two of them. In the first set of experiments, the I–V characteristic and the distribution of the current density along the ground plane were measured. The second set of experiments were carried out with the objective to record the electric potential at the surface of polypropylene (PP) films exposed to corona discharge generated by these electrodes in two charging modes: static and dynamic. The obtained results point to the distribution of both the corona current density and the electric potential at the surface of PP films.

电晕放电是工业过程中广泛使用的一种为绝缘膜，非织造介质或粒状材料充电的方法。它的效率通过暴露物体表面电荷分布的高水平和均匀性来评估。这项工作的目的是评估新型多线电晕电极的充电效率。已经考虑了几个几何参数，更具体地讲，导线的数量以及其中任意两个之间的距离。在第一组实验中，测量了I–V特性和沿接地平面的电流密度分布。进行第二组实验的目的是记录两种电极在静态充电和动态充电两种方式下，暴露于由这些电极产生的电晕放电的聚丙烯（PP）膜表面的电势。所得结果表明电晕电流密度和PP膜表面的电势均分布。