Low-voltage aluminum-foil-type series connection safe filter capacitor

Abstract

The invention discloses a low-voltage aluminum-foil-type series connection safe filter capacitor which comprises a first insulation medium layer, an automatic repairation composite metal layer, a second insulation medium layer, first aluminum foil and second aluminum foil, wherein the automatic repairation composite metal layer is formed on the first insulation medium layer; the second insulation medium layer is arranged on the automatic repairation composite metal layer; and the first aluminum foil and the second aluminum foil are arranged on the second insulation medium layer in a mutual separation mode, and are used for two leading-out polar plates which form the capacitor. The capacitor provided by the invention has stable capacitance loss under high current and harmonic wave current; the service life of the capacitor is more than 10 times that of a metallic capacitor; the capacitor has an automatic repairation function; and open circuit safe protection can occur under the condition of high voltage and high instant current.

Description

technical field [0001] The invention relates to an aluminum foil type series safety filter capacitor. Background technique [0002] The traditional low-voltage filter capacitor is made of metallized polypropylene film, which has the advantages of small size, light weight, good self-healing property, and low price; but this type of capacitor is generally only 0.02mm thick due to the thin metal plate , poor current resistance, under the impact of high current or harmonic current, the metal layer is easy to evaporate, and the effective area of ​​the capacitor plate is reduced, resulting in the rapid decay of the capacitance value of the capacitor, while the loss value increases, and the capacitor is damaged. Under the working environment with multiple harmonics, this kind of low-voltage filter capacitor equipment has short service life, poor reliability and high accident rate. [0003] Therefore, it is necessary to design a long-life, safe and / or non-attenuating aluminum foil ...

AI Technical Summary

Problems solved by technology

[0002] The traditional low-voltage filter capacitor is made of metallized polypropylene film, which has the advantages of small size, light weight, good self-healing property, and low price; but this type of capacitor is generally only 0.02mm thick due to the thin metal plate , poor current resistance, under the impact of high current or harmonic current, the metal layer is easy to evaporate, and the effective area of ​​the capacitor plate is reduced, resulting in the rapid decay of the capacitance value of the capacitor, while the loss value increases, and the capacitor is damaged. Under the working environment with multiple harmonics, this kind of low-voltage filter capacitor equipment has short service life, poor reliability and high accident rate

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