INFLUENCE OF PERFORATED LAYER PROPERTIES ON BACK CORONA DISCHARGE PHENOMENON
Journal Title: Proceedings of Electrotechnical Institute Prace Instytutu Elektrotechniki - Year 2012, Vol 59, Issue 259
Abstract
The mechanism of back corona discharge phenomenon is described in the paper. Back ionization process leads to a formation of so called ring of electric charge around the perforation in the dielectric layer. The model of the perforated dielectric layer with a ring of charge is proposed. Electrical properties of the layer and the area of the discharge (ring of charge) is described by a supplementary resistance R, capacitance C1 of the air duct in the dielectric layer and capacitance C2 of the discharge area on the surface of dielectric. This model enable to determine the width of the discharge area, resulting from the accumulation of electric charge on the perforated dielectric layer. Calculated values of the width are in the range from several to tens of micrometers, depending on the electrical properties and geometry of the perforated layer. Current-voltage characteristics of the discharge system for variable perforation is also presented. The results of measurements clearly show that mutual approaching the holes at a distance comparable to the layer thickness and diameter of perforation, leads to a significant reduction in the total discharge current in the system. This phenomenon could be associated with the interaction of the individual rings of charge.
Authors and Affiliations
Tomasz CZAPKA
Keywords
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