CN103680942A - High-capacity metallized polyester film direct current capacitor - Google Patents
High-capacity metallized polyester film direct current capacitor Download PDFInfo
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- CN103680942A CN103680942A CN201310577575.5A CN201310577575A CN103680942A CN 103680942 A CN103680942 A CN 103680942A CN 201310577575 A CN201310577575 A CN 201310577575A CN 103680942 A CN103680942 A CN 103680942A
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- polyester film
- capacitor
- direct current
- resistant
- capacitor core
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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
The present invention relates to electronic devices and components field, particularly relate to a kind of large capacity metallized polyester film direct current capacitor.
Background technology
Metallized film capacitor is that the surperficial evaporation layer of metal film at polyester film replaces metal forming as electrode because the thickness of layer of metallized film much smaller than the thickness of metal forming, therefore reel after volume also little a lot of than type metal foil type electric capacity volume.The great advantage of metalized film electric capacity is " self-healing " characteristic.If so-called self-healing feature is exactly, thin film dielectrics is owing to having defect and occur puncture short under overvoltage effect at certain point, and the metal layer of breakdown point can form in instant melting evaporation under arcing one very little of metal area, two pole pieces that make electric capacity are mutually insulated and still working on again, has therefore greatly improved the reliability of capacitor work.From principle, analyzing, should not there is not the pattern of short-circuit failure in metallized film capacitor, and type metal foil type capacitor there will be the phenomenon of a lot of short-circuit failures.Though metallic film capacitor has above-mentioned huge advantage, but compare with type metal foil type electric capacity, also there are two shortcomings: capacity stability is poor with the large current capacity of tolerance not as foil type capacitor, shows after deliberation to use double-sided metal film to do electrode and can avoid above shortcoming.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of large capacity metallized polyester film direct current capacitor, adopt two-sided zinc polyester film to do dielectric medium and electrode, have that capacity is large, electrical property is good, the feature of good reliability, there is the self-healing performance high temperature resistant, volume is little and good simultaneously.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of large capacity metallized polyester film direct current capacitor is provided, comprise heat-resistant fireproof shell, two lead-in wire and capacitor core, described capacitor core is encapsulated in described heat-resistant fireproof shell, described capacitor core is done dielectric medium and electrode roll around forming by double-sided metal film, described double-sided metal film comprises that polyester film and evaporation are at the metallic zinc layer of polyester film upper and lower surface, described lead-in wire adopts CP wire, and described heat-resistant fireproof shell adopts high temperature resistant ABS plastic.
In a preferred embodiment of the present invention, described large capacity metallized polyester film direct current capacitor is unidirectional deriving structure.
In a preferred embodiment of the present invention, described capacitor core is encapsulated in described heat-resistant fireproof shell by epoxy resin encapsulating material.
The invention has the beneficial effects as follows: capacitor core is done dielectric medium and electrode roll around forming by two-sided zinc polyester film, adopt unidirectional deriving structure, have capacitance large, capacity stability is good, tolerate the feature that large current capacity is good, there is the little and good feature of self-healing performance of volume simultaneously; Adopt high temperature resistant ABS plastic as shell, and use epoxy resin encapsulating material to encapsulate, good reliability, has wear-resisting, withstand voltage, resistant to elevated temperatures performance, can extend the useful life of electric capacity; Adopt CP wire to go between, there is good weldability and mechanical property.
Accompanying drawing explanation
Fig. 1 is the structural representation of the large capacity metallized polyester film of the present invention direct current capacitor one preferred embodiment;
In accompanying drawing, the mark of each parts is as follows: 1, heat-resistant fireproof shell, 2, capacitor core, 3, lead-in wire, 4, polyester film, 5, metallic zinc layer.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention is made to more explicit defining.
Refer to Fig. 1, the embodiment of the present invention comprises:
A kind of large capacity metallized polyester film direct current capacitor, comprise heat-resistant fireproof shell 1, two lead-in wires 3 and capacitor core 2, described capacitor core 2 is encapsulated in described heat-resistant fireproof shell 1, described capacitor core 2 is done dielectric medium and electrode roll around forming by double-sided metal film, described double-sided metal film comprises that polyester film 4 and evaporation are at the metallic zinc layer 5 of polyester film 4 upper and lower surfaces, described lead-in wire 3 adopts CP wire, and described heat-resistant fireproof shell 1 adopts high temperature resistant ABS plastic.
Wherein, described large capacity metallized polyester film direct current capacitor is unidirectional deriving structure.
Described capacitor core 2 is encapsulated in described heat-resistant fireproof shell 1 by epoxy resin encapsulating material.
The present invention has disclosed a kind of large capacity metallized polyester film direct current capacitor, capacitor core is done dielectric medium and electrode roll around forming by two-sided zinc polyester film, adopt unidirectional deriving structure, there is capacitance large, capacity stability is good, tolerate the feature that large current capacity is good, there is the little and good feature of self-healing performance of volume simultaneously; Adopt high temperature resistant ABS plastic as shell, and use epoxy resin encapsulating material to encapsulate, good reliability, has wear-resisting, withstand voltage, resistant to elevated temperatures performance, can extend the useful life of electric capacity; Adopt CP wire to go between, there is good weldability and mechanical property.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (3)
1. a large capacity metallized polyester film direct current capacitor, it is characterized in that, comprise heat-resistant fireproof shell, two lead-in wire and capacitor core, described capacitor core is encapsulated in described heat-resistant fireproof shell, described capacitor core is done dielectric medium and electrode roll around forming by double-sided metal film, described double-sided metal film comprises that polyester film and evaporation are at the metallic zinc layer of polyester film upper and lower surface, and described lead-in wire adopts CP wire, and described heat-resistant fireproof shell adopts high temperature resistant ABS plastic.
2. large capacity metallized polyester film direct current capacitor according to claim 1, is characterized in that, described large capacity metallized polyester film direct current capacitor is unidirectional deriving structure.
3. large capacity metallized polyester film direct current capacitor according to claim 1, is characterized in that, described capacitor core is encapsulated in described heat-resistant fireproof shell by epoxy resin encapsulating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310577575.5A CN103680942A (en) | 2013-11-19 | 2013-11-19 | High-capacity metallized polyester film direct current capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310577575.5A CN103680942A (en) | 2013-11-19 | 2013-11-19 | High-capacity metallized polyester film direct current capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103680942A true CN103680942A (en) | 2014-03-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310577575.5A Pending CN103680942A (en) | 2013-11-19 | 2013-11-19 | High-capacity metallized polyester film direct current capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103680942A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109036880A (en) * | 2018-08-10 | 2018-12-18 | 安徽长容电子有限公司 | A kind of welding method of capacitor |
-
2013
- 2013-11-19 CN CN201310577575.5A patent/CN103680942A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109036880A (en) * | 2018-08-10 | 2018-12-18 | 安徽长容电子有限公司 | A kind of welding method of capacitor |
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Legal Events
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140326 |