Anti-attenuation capacitor film

Abstract

The invention discloses an anti-attenuation capacitor film comprising a base film, a metal layer and a silicon oil protective layer. The metal layer is arranged on the base film. The silicon oil protective layer covers the metal layer. The base film is provided with multiple isolation strips shaped like a Chinese character "gan". The edge of one side of the base film is provided with a bar-shapedisolation strip. The tail parts of the isolation strips shaped like the Chinese character "gan" are connected with the bar-shaped isolation strip. The metal layer comprises a first aluminum coating layer and a zinc coating layer. One silicon oil protective layer is arranged on the whole metal layer for air isolation so that the situation that aluminum and zinc are oxidized by the air can be avoided and the anti-oxidation capacity of the metalized film can be enhanced. After using the isolation strips shaped like the Chinese character "gan", loss of capacity is 1 / 2-1 / 4 of the original loss in case of power abnormity so that the service life can be greatly prolonged and the power factor and energy saving and emission reduction can be enhanced.

Description

technical field [0001] The invention relates to a coating structure of a thin film for a metallized capacitor, in particular to an anti-decay capacitor thin film. Background technique [0002] A capacitor is formed between any two conductors (including wires) that are insulated from each other and are very close to each other. Film capacitors use metal foil as an electrode, and it is laminated with plastic films such as polyethylene, polypropylene, polystyrene or polycarbonate from both ends, and then wound into a cylindrical capacitor. According to the type of plastic film, it is called polyethylene capacitor (also called Mylar capacitor), polypropylene capacitor (also called PP capacitor), polystyrene capacitor (also called PS capacitor) and polycarbonate capacitor. [0003] Film capacitors are excellent capacitors due to their many excellent characteristics. Its main characteristics are as follows: non-polarity, high insulation resistance, excellent frequency characteri...

AI Technical Summary

Problems solved by technology

The film T-shaped isolation strip used in the traditional metallized film capacitors currently used, when the metallized film capacitors of this type are used, after an abnormal voltage is applied, the film itself has defects or the material itself has poor impedance. Due to the sudden rise in temperature, the safety button (or fuse for short) between the isolation belts will break and burn out. When there is poor insulation resistance, the film at the connection of the safety button will evaporate due to high temperature The capacity reduction caused by the evaporation of the transition metal layer is particularly obvious when the film thickness corresponds to a withstand voltage of 80v / μm or more

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