CN204706463U - High voltage thin film capacitor - Google Patents
High voltage thin film capacitor Download PDFInfo
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- CN204706463U CN204706463U CN201520416262.6U CN201520416262U CN204706463U CN 204706463 U CN204706463 U CN 204706463U CN 201520416262 U CN201520416262 U CN 201520416262U CN 204706463 U CN204706463 U CN 204706463U
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Abstract
The utility model discloses a kind of high voltage thin film capacitor, this capacitor comprises: shell, be provided with at least two fuses connected by the parallel coupled electrical of epoxy encapsulation in it, each fuse is all for by the two-sided metallization aluminium as electrode one, the two-sided metallization aluminium as electrode two be between electrode one and electrode two as the bipolar electrode column that the polypropylene film of dielectric layer is rolled into jointly; First extraction electrode, is located on shell, and the lower end encapsulation of this first extraction electrode is fixed on electrode one electrical connection by wire and each fuse in epoxy resin, and upper end reaches outside shell; Second extraction electrode, is located on shell, and the lower end encapsulation of this second extraction electrode is fixed on electrode two electrical connection by wire and each fuse in epoxy resin, and upper end reaches outside shell.This film capacitor operating voltage is high, shock-resistant galvanic good, volume is little, has self-healing property.
Description
Technical field
The utility model relates to capacitor area, particularly relates to a kind of high voltage thin film capacitor.
Background technology
Capacitor great majority at present in 1000V alternating current circuit are the alminium electrolytic condenser series connection use of 500V by two rated voltages, need to do a voltage balancing system between the two capacitors and balance voltage between two capacitors, avoid the too high and breakdown inefficacy of single condenser voltage, the complexity that such whole system becomes, the reliability of alminium electrolytic condenser and fail safe also can reduce.If use film capacitor, only need an operating voltage to be 1000V AC diaphragm capacitor, do not need the balance of voltage, whole system will become simpler.Compare aluminium electrolytic capacitor due to film capacitor and there is higher monomer operating voltage, higher reliability, life cycle length, safety and environmental protection, widely use in mesohigh field.
Existing a kind of film capacitor adopts one-sided metallic film as dielectric layer, the monolithic capacitor fuse with certain capacity is formed by winding process process, metal spraying PROCESS FOR TREATMENT forms electrode for capacitors, technique of energizing is rejected the flaw existed in capacitor body, then by the finished product welded, assembling formation one is complete.This one-sided metallic film capacitor has that proof voltage is high, loss tangent is little, insulation resistance is high, volume is little, self-healing property is good, the features such as long service life, but due to the very thin thickness of metal level, the sheet resistance of metal level is larger, the equivalent series resistance of capacitor is also larger, cause capacitor active power large, shock-resistant galvanic not high.
Existing another kind of film capacitor adopts metal forming as electrode, plastic film is as dielectric layer, formed the monolithic capacitor fuse with certain capacity by winding process process, metal spraying PROCESS FOR TREATMENT forms electrode for capacitors, then by the finished product welded, assembling formation one is complete.The film capacitor of this employing metal forming has that proof voltage is high, loss tangent is little, insulation resistance is high, dv/dt value is high, shock-resistant galvanic good, its shortcoming be capacitor without self-healing property, the reliability of electric capacity is lower, and the volume of capacitor is larger.
Utility model content
Based on the problem existing for above-mentioned prior art, the utility model provides a kind of high voltage thin film capacitor, and its operating voltage is high, shock-resistant galvanic good, volume is little, has self-healing property.
For solving the problems of the technologies described above, the utility model provides a kind of high voltage thin film capacitor, comprising:
Shell, be provided with at least two fuses connected by the parallel coupled electrical of epoxy encapsulation in it, each fuse is all for by the two-sided metallization aluminium as electrode one, the two-sided metallization aluminium as electrode two be between described electrode one and electrode two as the bipolar electrode column that the polypropylene film of dielectric layer is rolled into jointly;
First extraction electrode, if on the housing, the lower end encapsulation of this first extraction electrode is fixed on electrode one electrical connection by wire and each fuse in described epoxy resin, and upper end reaches outside described shell;
Second extraction electrode, if on the housing, the lower end encapsulation of this second extraction electrode is fixed on electrode two electrical connection by wire and each fuse in described epoxy resin, and upper end reaches outside described shell.
The beneficial effects of the utility model are: the fuse of this capacitor adopts by the two-sided metallization aluminium as two electrodes and is jointly rolled into as the polypropylene film of dielectric layer, polypropylene film is nonpolarity, every micron thickness can bear 200V alternating voltage, its insulation resistance can reach 10M Ω, and loss tangent is not more than 2 × 10
-4.Because polypropylene film has above good characteristic, so it is 1000V that the electrical property of this film capacitor also reaches its operating voltage, loss tangent reaches 10
-4level, insulating resistance value reaches more than 100M Ω, dv/dt value is high, shock-resistant galvanic good, volume is little; In addition, fuse adopts two-sided metallization aluminium as electrode, namely this electrode lead-out mode possesses the feature of the self-healing property that one-sided metallic metal has as electrode, has possessed again the large feature of shock-resistant electric current that metal forming has as electrode but has overcome the strong shortcoming of the shock-resistant current capacity of one-sided metallicization and metal forming without self-healing property, bulky shortcoming simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
The vertical section structure schematic diagram of the high voltage thin film capacitor that Fig. 1 provides for the utility model embodiment;
The parts that in figure, each label is corresponding are: 1. fuse, 2. core group, 3. the first extraction electrode, 4. epoxy resin, 5. shell, 6. insulating barrier, 7. the second extraction electrode.
Embodiment
Be clearly and completely described the technical scheme in the utility model embodiment below, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on embodiment of the present utility model, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to protection range of the present utility model.
Below in conjunction with the drawings and specific embodiments, capacitor of the present utility model is described further.
As shown in Figure 1, the utility model embodiment provides a kind of high voltage thin film capacitor, is that a kind of operating voltage is high, shock-resistant galvanic good, volume is little and have the film capacitor of self-healing property, this capacitor comprises:
Shell, be provided with at least two fuses connected by the parallel coupled electrical of epoxy encapsulation in it, each fuse is all for by the two-sided metallization aluminium as electrode one, the two-sided metallization aluminium as electrode two be between electrode one and electrode two as the bipolar electrode column that the polypropylene film of dielectric layer is rolled into jointly;
First extraction electrode, is located on shell, and the lower end encapsulation of this first extraction electrode is fixed on electrode one electrical connection by wire and each fuse in epoxy resin, and upper end reaches outside shell;
Second extraction electrode, is located on shell, and the lower end encapsulation of this second extraction electrode is fixed on electrode two electrical connection by wire and each fuse in epoxy resin, and upper end reaches outside shell.
In above-mentioned film capacitor, shell is metal shell, the first extraction electrode and insulating between the second extraction electrode and metal shell; Also comprise: insulating barrier, around the periphery being located at each fuse, be jointly encapsulated in epoxy resin with each fuse, between each fuse and metal shell.Preferably, metal shell adopts aluminium shell or iron shell.The reliability of this metal shell film capacitor is promoted by arranging insulating barrier.Shell also can adopt plastic casing.
In above-mentioned film capacitor, the first extraction electrode and the second extraction electrode all adopt any one in metal column line, metal flexible electrode or metal welding plate electrode.Preferably, the first extraction electrode and the second extraction electrode all adopt post line.First extraction electrode and the second extraction electrode all can be located at the same side (drawing in the same way) of shell or be located at both sides, shell upper and lower end face (axial lead).
As shown in Figure 1, time prepared by this capacitor, using two-sided metallization aluminium as electrode material, using polypropylene film as dielectric layer, form the fuse needed for capacitor through winding process process, so latter two fuse assembly welding be unified into the core group of twin-core minor structure, form insulating barrier after core group being carried out the process of insulation parcel and load in aluminium shell and use epoxy resin encapsulated, by the time, after epoxy resin cure, the test of capacitance, proof voltage, loss tangent, insulation resistance parameter is carried out.Preferably, shell also can select the shell of iron material matter, or the shell of plastic material, and the shell according to plastic material then can not carry out insulation parcel to core group, can select flexible wire type, lug as the first extraction electrode of exit and the second extraction electrode.
This capacitor is owing to have employed polypropylene film as its dielectric layer, and polypropylene film is nonpolarity, and every micron thickness can bear 200V alternating voltage, and its insulation resistance can reach 10M Ω, and loss tangent is not more than 2 × 10
-4.Because polypropylene film has above good characteristic, so it is 1000V that the electrical property of film capacitor of the present utility model also reaches its operating voltage, loss tangent will reach 10
-4level, insulating resistance value will reach more than 100M Ω, dv/dt value is high, shock-resistant galvanic good, volume is little.In addition, two electrodes of this capacitor adopt two-sided metallization aluminium as electrode, namely this electrode lead-out mode possesses the feature of the self-healing property that one-sided metallic metal has as electrode, has possessed again the large feature of shock-resistant electric current that metal forming has as electrode but has overcome the strong shortcoming of the shock-resistant current capacity of one-sided metallicization and metal forming without self-healing property, bulky shortcoming simultaneously.The encapsulant choice for use epoxy resin dry type encapsulation of this capacitor, epoxy resin has the advantages such as good airproof performance, cheap, environmental protection.Capacitor internal structure adopts twin-core in parallel, and this structural design has reduction capacitor internal resistance, reduces the heat that capacitor in use produces, and increases the useful life of capacitor.Particularly, be used in safer in the alternating current circuit of mesohigh or impulse circuit, the life-span is longer.
The above; be only the utility model preferably embodiment; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claims.
Claims (7)
1. a high voltage thin film capacitor, is characterized in that, this capacitor comprises:
Shell, be provided with at least two fuses connected by the parallel coupled electrical of epoxy encapsulation in it, each fuse is all for by the two-sided metallization aluminium as electrode one, the two-sided metallization aluminium as electrode two be between described electrode one and electrode two as the bipolar electrode column that the polypropylene film of dielectric layer is rolled into jointly;
First extraction electrode, if on the housing, the lower end encapsulation of this first extraction electrode is fixed on electrode one electrical connection by wire and each fuse in described epoxy resin, and upper end reaches outside described shell;
Second extraction electrode, if on the housing, the lower end encapsulation of this second extraction electrode is fixed on electrode two electrical connection by wire and each fuse in described epoxy resin, and upper end reaches outside described shell.
2. high voltage thin film capacitor according to claim 1, is characterized in that, described shell is metal shell, described first extraction electrode and insulating between the second extraction electrode and described metal shell;
Also comprise: insulating barrier, around the periphery being located at each fuse, be jointly encapsulated in described epoxy resin, between each fuse and described metal shell with each fuse.
3. high voltage thin film capacitor according to claim 2, is characterized in that, described metal shell adopts aluminium shell or iron shell.
4. high voltage thin film capacitor according to claim 1, is characterized in that, described shell adopts plastic casing.
5. the high voltage thin film capacitor according to any one of Claims 1-4, is characterized in that, described first extraction electrode and the second extraction electrode all adopt any one in metal column line, metal flexible electrode or metal welding plate electrode.
6. high voltage thin film capacitor according to claim 5, is characterized in that, described first extraction electrode and the second extraction electrode all adopt metal column line, metallic cords or metal weld tabs.
7. the high voltage thin film capacitor according to any one of Claims 1-4, is characterized in that, described first extraction electrode and the second extraction electrode are all located at the same side of described shell or are located at both sides, shell upper and lower end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520416262.6U CN204706463U (en) | 2015-06-16 | 2015-06-16 | High voltage thin film capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520416262.6U CN204706463U (en) | 2015-06-16 | 2015-06-16 | High voltage thin film capacitor |
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| CN204706463U true CN204706463U (en) | 2015-10-14 |
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| CN201520416262.6U Active CN204706463U (en) | 2015-06-16 | 2015-06-16 | High voltage thin film capacitor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199120A (en) * | 2016-06-22 | 2016-12-07 | 西北核技术研究所 | Interpolation type thin-film capacitor voltage divider |
| CN107870260A (en) * | 2017-12-15 | 2018-04-03 | 武汉东硕电气有限公司 | One kind metering takes can integrated high-accuracy voltage sensor |
| CN109036847A (en) * | 2018-08-08 | 2018-12-18 | 安徽长容电子有限公司 | A kind of automobile capacitor and preparation method thereof |
| CN113168965A (en) * | 2018-12-03 | 2021-07-23 | Abb电网瑞士股份公司 | Thin film capacitor with balanced path |
-
2015
- 2015-06-16 CN CN201520416262.6U patent/CN204706463U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199120A (en) * | 2016-06-22 | 2016-12-07 | 西北核技术研究所 | Interpolation type thin-film capacitor voltage divider |
| CN106199120B (en) * | 2016-06-22 | 2018-10-26 | 西北核技术研究所 | Interpolation type thin-film capacitor voltage divider |
| CN107870260A (en) * | 2017-12-15 | 2018-04-03 | 武汉东硕电气有限公司 | One kind metering takes can integrated high-accuracy voltage sensor |
| CN109036847A (en) * | 2018-08-08 | 2018-12-18 | 安徽长容电子有限公司 | A kind of automobile capacitor and preparation method thereof |
| CN113168965A (en) * | 2018-12-03 | 2021-07-23 | Abb电网瑞士股份公司 | Thin film capacitor with balanced path |
| CN113168965B (en) * | 2018-12-03 | 2022-12-13 | 日立能源瑞士股份公司 | Thin film capacitor with balanced path |
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