System for ionization by electric discharge with dielectric barrier, used for the surface treatment of substrates such as plastic film or metal leaves, includes an ionization step where the high voltage electrode is charged by generator

摘要

The method comprises a ionization step during which the high voltage electrode (23) is electrically charged by the electric generator (4) to ionize active elements of the ionization zone (24). The ionization step comprises excitation of the high voltage electrode (23) with an excitation signal (SE) having pulses between a reference potential and an ionization potential (V), whereof the leading edge (delta) is of the order of the propagation time of the electron avalanche in the ionization zone (24). The method is for ionization by electric discharge with dielectric barrier, of an ionization zone (24) whereof the atmosphere comprises active ionizing elements, the ionization zone (24) being delimited by two electrodes (21, 23), namely a reference electrode (21) connected to a reference potential and a high voltage electrode (23) connected to an electric generator (4), at least one of the electrodes being coated with a dielectric material (22).