High-capacity metallized polyester film direct current capacitor

A metallized polyester film, direct current technology, used in wire wound capacitors, fixed capacitor electrodes, fixed capacitor dielectrics, etc. Good high current capability, good self-healing performance and good capacity stability

Inactive Publication Date: 2014-03-26
张家港市星河电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although metallized film capacitors have the above-mentioned huge advantages, they also have two disadvantages compared with metal foil capacitors: the capacity stability is not as good as that of foil capacitors and the ability to withstand large currents is poor. Studies have shown that the use of double-sided metallized films Doing electrodes can avoid the above disadvantages

Method used

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  • High-capacity metallized polyester film direct current capacitor

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Embodiment Construction

[0010] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0011] see figure 1 , the embodiment of the present invention includes:

[0012] A large-capacity metallized polyester film DC capacitor, comprising a high-temperature-resistant flame-retardant shell 1, two lead wires 3 and a capacitor core 2, the capacitor core 2 is packaged in the high-temperature-resistant flame-retardant shell 1, the Capacitor core 2 is wound by double-sided metallized film as dielectric and electrode, said double-sided metallized film includes polyester film 4 and metal zinc layer 5 vapor-deposited on the upper and lower sides of polyester film 4, The lead wire 3 is made of tinned copper-clad steel wire, and the high-temper...

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Abstract

The invention discloses a high-capacity metallized polyester film direct current capacitor, which includes a high-temperature-resistant and flame-retardant shell, two wires and a capacitor core. The capacitor core is packaged in the high-temperature-resistant and flame-retardant shell; the capacitor core is formed by winding of a two-sided metallized film which is used as a dielectric and an electrode; the two-sided metallized film includes a polyester film and a metal zinc layer which is respectively evaporated on upper and lower surfaces of the polyester film; each wire uses a tin-coated copper-clad steel wire; and the high-temperature-resistant and flame-retardant shell adopts a high-temperature-resistant ABS plastic. With the above method, the capacitor has the characteristics of large capacity, excellent electrical performance, good reliability, high temperature resistance, small volume and good self-healing performance.

Description

technical field [0001] The invention relates to the field of electronic components, in particular to a large-capacity metallized polyester film DC capacitor. Background technique [0002] Metallized film capacitor is to evaporate a layer of metal film on the surface of polyester film instead of metal foil as an electrode, because the thickness of the metallized film layer is much smaller than the thickness of the metal foil, so the volume after winding is also smaller than that of the metal foil capacitor. Much smaller in size. The biggest advantage of metallized film capacitors is the "self-healing" characteristic. The so-called self-healing characteristic is that if the film medium has a defect at a certain point and a breakdown short circuit occurs under the action of overvoltage, the metallization layer at the breakdown point can be melted and evaporated instantly under the action of an arc to form a small metal-free area. , so that the two pole pieces of the capaci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/005H01G4/015H01G4/14H01G4/224H01G4/236H01G4/32
Inventor 闵雁
Owner 张家港市星河电子有限公司
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