Abstract:
In a metal-plating for a foil capacitor, a dielectric capacitor foil (3) provided with a metallic coating (4) is wound in the running direction (y) of the foil into a capacitor element, and the coating (4) is subdivided into segments. The coating consists of an alloy-plating that is profiled transversely to the running direction and partially segmented.
Abstract:
The invention relates to an electric capacitor, especially a film or stack capacitor, with an inner series connection, comprising at least two plastic films (1,2) which are provided with metal layers (3,4,5). Both metal layers (3,4) are separated from the first plastic film (1) by a metal-free strip (8) which is covered by metal layers. The metal layers have a circular or elliptical cross section and define the capacitance of the capacitor.
Abstract:
This application describes methods and apparatus for the safety and protection of capacitor units suitable for medium and high voltage applications, for instance within switching modules (400) of a voltage source converter as may be used for HVDC or FACTs. The capacitor unit (300) has a housing (201) within which is a capacitor comprising a plastic film dielectric material, for instance a winding (100) of first and second plastic films (101, 102) with metal coatings(103, 104). A pressure sensor (302) is configured to detect if the pressure in the housing exceeds a first pressure level and a pressure relief valve (304) is configured to vent gas from the housing if the pressure in the housing exceeds a second pressure level which is higher than the first pressure level.
Abstract:
La présente invention se rapporte notamment à un condenseur film à très haute capacité(1)qui comporte une couche diélectrique (100)constituée d'au moins un film diélectrique (100a,..., 100i), chaque film diélectrique(100a,..., 100i) de cette couche diélectrique (100) présentant les paramètres suivants: -une permittivité diélectrique relative [ε f i ] telle que ε f i ≥ 10, -une épaisseur [e f i ] telle que 0.05µm ≤ e f i ≤ 50 µm, -une rigidité diélectrique [E f i ]telle que E f i ≥ 50 V/µm, paramètres dans lesquels "f" signifie "film" et i ≥ 1, "i" désignant le "i ème " film diélectrique (100i) de ladite couche diélectrique (100), cette couche diélectrique (100) séparant une première structure porteuse de charges électroniques (200) d'une deuxième structure porteuse de charges électroniques(300), ces deux structures ayant une surface en regard(S) séparée par la couche diélectrique (100).
Abstract:
A capacitor having a first electrode (11), a second electrode (13), a dielectric layer of a PTFE film (10) having a dielectric strength greater than about 500 v/um, a tensile strength of greater than about 68.9 MPa (10,000 psi) (or, alternatively, a tensile yield strength of greater than about 13.8 MPa (2,000 psi) ), and a thickness less than about 20 microns disposed between the first electrode (11) and the second electrode (13).