摘要:
The invention relates to an electrode arrangement for forming a dielectric barrier plasma discharge between an electrode (1) supplied with an AC high voltage by a control device (20) and a treatment surface (21) of an electrically conductive body (22), said arrangement functioning as a ground electrode, wherein a dielectric material (8) completely covers the electrode (1) up to the treatment surface (21) and forms a contact side for the surface (21). The electrode arrangement permits effective and homogeneous formation of the plasma (23), in particular for large treatment surfaces (21), because the electrode (1) consists of at least two electrode portions (2, 3) arranged next to one another at the same distance (6) from the contact side and insulated from one another by the dielectric material (8), and because adjacent electrode portions are supplied by the control device with compensating partial AC voltages which are mirror-inverted in terms of the waveform and the voltage level.
摘要:
The invention relates to an electrode arrangement for forming a dielectrically impeded plasma between an active surface (10) of the electrode arrangement and a surface acting as counter-electrode, having a flexible, planar electrode (8) that can be connected to a high voltage source (28) and having a planar, flexible dielectric (9) that forms the active surface (10) and is connected to the planar electrode (8) to form an electrode element (7), and completely covers the electrode (8) towards the surface to be treated. According to the invention the electrode arrangement has improved adaptability to irregular surfaces by means of a contact means (4) having surface elasticity for pressing onto the rear face of the electrode element (7) facing away from the surface, in such a manner that the electrode element (7), by local deformation, can automatically be adapted to irregularities of the surface.
摘要:
The invention relates to a flexible flat electrode arrangement for a dielectrically limited gas discharge, comprising a central region (3), an edge region, and a flat electrode (14) which conducts a high-voltage potential and which is embedded in a flat dielectric that forms an upper face (10) and a contact face (6). The invention allows the active surface of the electrode arrangement to be matched to the size of a surface to be treated in that the flat dielectric is in the form of a flat strip (1) wound into a spiral at least in the edge region, and the electrode (14) is formed by at least one electric conductor which runs in the longitudinal direction of the wound strip (1) and which leads into an end surface (13) of the strip (1).
摘要:
A device for treating a surface with a dielectric barrier plasma, wherein the surface functions as a counterelectrode, having an electrically insulating housing (1) which is formed from a housing body (4) and a housing head (17) and in which a high-voltage feed line (10) and a support for an electrode (18), which is connected to the high-voltage feed line (10) and has a dielectric (19) which shields the electrode (18) from the surface, is located, wherein the electrode (18) is rotatably mounted in the housing head (17) and, by way of a surface section which is covered by the dielectric (19), protrudes out of the housing head (17), allows, with a simple construction, a fundamentally unrestricted movement of the electrode over the surface to be treated in that the electrode has rotary bearing elements (28) which are arranged in a centre axis and with which it is rotatably mounted about the centre axis in the housing head (17) in interaction with rotary bearing elements (29) and is connected to the high-voltage feed line (10), and in that the housing head (17) is connected to the housing body (4) such that it can rotate about a rotation axis which is at an angle to the centre axis and is provided with a contact arrangement (11, 21) for maintaining an electrical connection during the rotary movement.