Patent ID: 6894886
Filing Date: 2005-05-17
Classification: H01G

Abstract:
1. A power capacitor for high voltage comprising: at least one capacitor element enclosed in a container, wherein each capacitor element has a substantially circular-cylindrical shape and an inside of the container has a corresponding substantially circular-cylindrical shape to closely surround each capacitor element, wherein each capacitor element is oriented with an axial direction coinciding with an axial direction of the container, the container being of electrically insulating material and provided with an electrical connection terminal arranged at each end of the container, whereby the container itself constitutes insulation between the connection terminals, wherein each capacitor element has a central channel running through it in an axial, direction, the through-running channels of the capacitor elements together forming a through-running channel between the two ends of the container, wherein the at least one capacitor element comprises at least two elongate ribbons of metal-coated polymer film placed one on ton of another and rolled up together in a longitudinal direction, with a least possible gap between turns of the film, and wherein the metal ribbons constitute electrodes of the at least one capacitor element, wherein said elongate ribbons are formed so that the metal-coated polymer films are arranged in several elongate areas with non-coated areas between them, a location and width of metal-coated areas varying alternately on two adjacent ribbons so that series-connected part capacitors are formed within the at least one capacitor element, and wherein at least three series-connected part capacitors are formed within each capacitor element.