Dry small-sized high-voltage metallation organic film capacitor

Abstract

The layer of enveloping the core is epoxy resin layer. Pressure-sensitive adhesive tape enwraps periphery of the epoxy resin layer, and a epoxy resin end perfusion layer is filled at the end of epoxy resin layer again. The dielectric layer of said core comprises at least two layers of polypropylene film or polyester film. The product possesses advantages of small size, lightweight, high specific energy, small equivalent series inductance, reliable performance and high operating voltage.

Description

Technical field [0001] The invention relates to a high-voltage filter capacitor, in particular to a dry-type high-voltage filter capacitor. Background technique [0002] Existing high-voltage filter capacitors generally use a rectangular metal shell, which is heavy and bulky; the core medium is made of capacitor paper or paper-film composite material, and its field strength is low. In order to meet the high-voltage requirements, the thickness must be increased; in order to ensure that the core To insulate the sub and the metal shell, the shell must be lined with a thick insulating gasket material, which also increases the volume and weight of the capacitor; and in order to ensure the insulation between the lead-out and the shell, the lead-out must be made of large volume, heavy weight Heavy high-voltage ceramic insulator and metal bolt structure; the gap in the shell is filled with liquid impregnating material. In order to avoid high-temperature penetration of liquid impregn...

AI Technical Summary

Problems solved by technology

[0002] Existing high-voltage filter capacitors generally use a rectangular metal shell, which is heavy and bulky; the core medium is made of capacitor paper or paper-film composite material, and its field strength is low. In order to meet the high-voltage requirements, the thickness must be increased; in order to ensure that the core To insulate the sub and the metal shell, the shell must be lined with a thick insulating gasket material, which also increases the volume and weight of the capacitor; and in order to ensure the insulation between the lead-out and the shell, the lead-out must be made of large volume, heavy weight Heavy high-voltage ceramic insulator and metal bolt structure; the gap in the shell is filled with liquid impregnating material. In order to avoid high-temperature penetration of liquid impregnating material during operation, the requirements for sealing are high and the sealing structure is complicated; in order to avoid abnormal temperature rise when the capacitor is working, Excessive expansion of the liquid impregnating material will cause deformation or explosion of the shell, and a certain expansion space must be reserved in the capacitor shell

These factors lead to high-voltage filter capacitors with large volume, heavy weight, and low ratio energy, which cannot meet the requirements of various modern electronic equipment, such as aircraft power supplies, for small-volume high-voltage power filter capacitors.

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