Trapezoidal evaporation metalizing polypropylene film capacitor

Abstract

The invention relates to the technical field of capacitors, and discloses a trapezoidal evaporation metalizing polypropylene film capacitor, which comprises a casing, capacitor cores, a leading-out terminal and a leading-out electrode, wherein the capacitor core comprises a high temperature-resistant polypropylene film, the polypropylene film is evaporated with a metal aluminum layer as an electronic moving area under the high-vacuum environment, the moving area is of a trapezoidal structure, the edge of the moving area is thickened and evaporated with a pure zinc layer as a thickening area, the evaporation trapezoidal square resistance in the moving area is controlled to 30-50 ohms, the square resistance in the thickening area is controlled to 2-4 ohms, and two to three capacitor cores are parallelly connected in the capacitor. The capacitor has the advantages that the voltage resistant property is high, the loss is little, the effective current can be withstood, the impact capacity is high, the temperature rise is low, the self equivalent serial resistance of the capacitor is little, the anti-oxidizing capacity is high, the safety and reliability are high, the service life is long, the storage is easy, the heat radiating property is good, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of capacitors, in particular to a trapezoidal evaporation metallized polypropylene film capacitor. Background technique [0002] With the continuous development of power electronic technologies such as SVG (Various Power Compensation Generator), high-voltage inverter, APF (Active Filter), wind power converter, and photovoltaic inverter in the field of new energy, high-power power electronic devices Higher technical performance and reliability requirements are put forward. The original aluminum electrolytic capacitors have low current capacity, cannot withstand reverse voltage impact, low voltage, large internal resistance, serious heat generation, acid pollution, short life, and difficult storage. Shortcomings and deficiencies can no longer meet the use requirements of this occasion. The rapid development of polypropylene film materials has made a breakthrough in the performance of film capacitors. It is an...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a trapezoidal vapor-deposited metallized polypropylene film capacitor to solve the problem of low current capacity of aluminum electrolytic capacitors in the prior art, inability to withstand reverse voltage impact, low voltage, large internal resistance, serious heat generation, and problems Acid pollution, short life, difficult to store, poor installation tolerance, not conducive to standardized assembly line installation, and the hardness of large-volume capacitor shells cannot meet the requirements of use

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