CN203950687U - high-voltage power capacitor - Google Patents
high-voltage power capacitor Download PDFInfo
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- CN203950687U CN203950687U CN201420291707.8U CN201420291707U CN203950687U CN 203950687 U CN203950687 U CN 203950687U CN 201420291707 U CN201420291707 U CN 201420291707U CN 203950687 U CN203950687 U CN 203950687U
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Abstract
The utility model discloses a kind of high-voltage power capacitor, it comprises a mandrel, on mandrel, be wound with two conductor pole plates, between two conductor pole plates, be provided with an insulating barrier, the material of insulating barrier is polypropylene film, polypropylene film has two-layer, every layer of polypropylene film comprises that a film bulk and is located at the surperficial roughened layer of film bulk, roughened layer is only arranged at upper surface or the lower surface of film bulk, roughened layer and film bulk are one-body molded, the thickness of polypropylene film is 10.0～20.0 μ m, 3.5%～5% of the thickness that the thickness of roughened layer is polypropylene film.The utility model can increase film thickness effectively, adds the withstand voltage level of strong film, optimizes the electric property of capacitor, for capacitor moves good guarantee is provided in harsh system.
Description
Technical field
The utility model relates to a kind of high-voltage power capacitor.
Background technology
High-voltage power capacitor moves in electric power system, is the visual plant of correcting power factors in system, by correcting power factors, can reduce the loss in circuit and transformer, improves change in voltage scope, reduces greatest requirements, improves the quality of power supply.Early stage capacitor fabrication adopts brown paper as dielectric, since the sixties in last century, polypropylene film is used to the manufacture of capacitor, because this material has very low loss and higher dielectric constant, and because polypropylene film has very thin thickness, what make that the volume of whole capacitor can do is very little, so capacitor manufacturing industry enters the full film epoch very soon.
Meanwhile; impregnating agent is used to the space in filling dielectric material; can effectively prevent the dielectric discharge that in dielectric, space may cause; in order to reach this object; traditional polypropylene film can adopt the design of double-sided coarsening conventionally, and there is alligatoring degree to a certain degree on the two sides of film.Alligatoring degree is that the technological parameters such as temperature by polypropylene fusion body is extruded, slab temperature, draft temperature are controlled, and polypropylene crystal habit is changed and produce, and it is a physical change process.
Melt polypropylene generates the crystalline textures such as β type crystal and alpha type crystal under coherent condition simultaneously, film production is utilized the unsettled feature of β type crystal exactly, at specific temperature, stretch, make β type crystal break and be converted into alpha type crystal in the moment that stretches, and will control and make it incomplete conversion.When making crystalline transformation due to the density of these two kinds of crystal and structure difference, film surface produces rough alligatoring line, is the surface coarsening degree that we claim.
Existing high-voltage power capacitor adopts two alligatoring face polypropylene films conventionally, and it exists following defect:
First, while needing to produce the more and more less unit of volume and weight under same capability, the element of capacitor internal is compressed more and more tighter, cause local compression coefficient too high, caused hidden danger to the dipping of capacitor, therefore,, while reducing the specific characteristic (weight of capacitor under unit reactive capability) of capacitor, can affect the electric property of capacitor.
The second, the thickness that the alligatoring of double-sided coarsening film film partly accounts for is large, and actual effectively thin film dielectrics part relative thickness just declines, and has caused the decline of film withstand voltage level, and this performance on capacitor integral body has impact.
The 3rd, the capacitor based on double-sided coarsening film adopts " group takes out group's note " or " group takes out single note " technology conventionally." group takes out single note " technology adopts the mode of dipping in tank, be about to carry out vacuumize in tank car that many capacitors are placed in vacuum tube, when vacuumize finishes rear dipping, insulating oil directly poured into tank car, allow oil cover capacitor, whole capacitor is immersed in and in insulating oil, carries out vacuum impregnation.In " group takes out group's note " technical process, the impurity on capacitor case and dirt are easy to pollute insulating oil, have a strong impact on product quality." group takes out single note " technology is utilized a heating in vacuum tank conventionally, vacuum-pumping system not only vacuumizes separately every capacitor, and heating in vacuum tank is also vacuumized, after dry end, then in heating in vacuum tank, every capacitor is carried out separately to vacuum impregnation.The shortcoming of adopting is in this way, in vacuumizing phase, need to vacuumize whole vacuum tank, carried out a lot of unnecessary work, causes the whole production cycle of product elongated, cannot meet the needs that present industrial market circulates at a high speed.
Utility model content
The technical problems to be solved in the utility model is the low defect of capacitor performance existing in order to overcome prior art, and a kind of high-voltage power capacitor is provided.
The utility model is to solve above-mentioned technical problem by following technical proposals:
A kind of high-voltage power capacitor, it comprises a mandrel, on described mandrel, be wound with two conductor pole plates, described in two, between conductor pole plate, be provided with an insulating barrier, its feature is, the material of described insulating barrier is polypropylene film, described polypropylene film has two-layer, every layer of described polypropylene film comprises that a film bulk and is located at the surperficial roughened layer of described film bulk, described roughened layer is only arranged at upper surface or the lower surface of described film bulk, described roughened layer and described film bulk are one-body molded, the thickness of described polypropylene film is 10.0～20.0 μ m, the thickness of described roughened layer be described polypropylene film thickness 3.5%～5%.
Preferably, the dielectric coefficient of described polypropylene film is 2.1～2.3.
Positive progressive effect of the present utility model is: the polypropylene film of one side alligatoring, the alligatoring degree that makes whole film is only half of traditional two-sided coarse thin film, thereby effective film thickness is increased, strengthened the withstand voltage level of film, optimized the electric property of capacitor, the electric durability of the one side alligatoring film of unit thickness can be able to exceed more than 12%～15% than double-sided coarsening film, for capacitor moves good guarantee is provided in harsh system.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model preferred embodiment.
Fig. 2 is the conductor pole plate of the utility model preferred embodiment and the structural representation between insulating barrier.
Embodiment
Lift a preferred embodiment below, and carry out by reference to the accompanying drawings the clearer the utility model that intactly illustrates.
As depicted in figs. 1 and 2, a kind of high-voltage power capacitor, it comprises mandrel 1, on mandrel, be wound with two conductor pole plates 2, between two conductor pole plates 2, be provided with insulating barrier, the material of insulating barrier is polypropylene film 3, polypropylene film 3 has two-layer, every layer of polypropylene film 3 comprises film bulk and the surperficial roughened layer of being located at film bulk, roughened layer is only arranged at upper surface or the lower surface of film bulk, roughened layer and film bulk are one-body molded, the thickness of described polypropylene film is 10.0～20.0 μ m, the thickness of described roughened layer be described polypropylene film thickness 3.5%～5%, the dielectric coefficient of described polypropylene film is 2.1～2.3, can be preferably 2.2.
In addition, the width of polypropylene film can be adjusted into 11.3～25.0 inches as required, and the stress pressure that longitudinally should be able to meet of polypropylene film is not less than 22000psi (pound/inch).The roughened layer on polypropylene film surface, is prior art, at this, just repeats no more.
Through test, the utility model has adopted the polypropylene film of one side alligatoring, and related experiment effect data is as follows:
When polypropylene film thickness is greater than 15 μ m and when above, under the alternating voltage test of 50Hz, its dielectric strength is not less than 360V/ μ m;
When polypropylene film thickness is greater than 15 μ m and when above, under vdct, its dielectric strength is not less than 560V/ μ m;
When polypropylene film thickness is less than 15 μ m, under the alternating current test of 50Hz, its dielectric strength is not less than 370V/ μ m;
When polypropylene film thickness is less than 15 μ m, under vdct, its dielectric strength is not less than 510V/ μ m.
For improving the electric property of capacitor, one side alligatoring polypropylene film of the present utility model, before use should be at least at 25 ℃, in the environment that relative humidity is 60% standing at least 24 hours.
The polypropylene film of the one side alligatoring adopting based on the utility model, can adopt the capacitor impregnation technology of " singly taking out single note ".What is called is singly taken out single note formula, refers to many capacitors are placed in large-scale drying room, and the vacuum system of sobbing is carried out separately vacuum suction to every capacitor, after vacuumize finishes, then in drying room, every capacitor is carried out separately to vacuum impregnation.
The saturating machine of singly taking out single note is better than that traditional group takes out group's note and group takes out single note.Under " singly taking out single note " mode, capacitor is from entering vacuum impregnation operation, capacitor just can not be exposed to (in industry, call is " broken empty ") in air again, thereby it is very thorough to guarantee that air, moisture are discharged, can be broken not empty because of going out tank, during solder up, again allow air, even moisture enters capacitor, so the micro-water content in capacitor can be controlled at low-down rank.
The polypropylene film of the one side alligatoring that the utility model adopts, the alligatoring degree that makes whole film is only half of traditional two-sided coarse thin film, thereby effective film thickness is increased, strengthened the withstand voltage level of film, optimized the electric property of capacitor, the electric durability of the one side alligatoring film of unit thickness can be able to exceed more than 12%～15% than double-sided coarsening film, for capacitor moves good guarantee is provided in harsh system.
Although more than described embodiment of the present utility model, it will be understood by those of skill in the art that this only illustrates, protection range of the present utility model is limited by appended claims.Those skilled in the art is not deviating under the prerequisite of principle of the present utility model and essence, can make various changes or modifications to these execution modes, but these changes and modification all fall into protection range of the present utility model.
Claims (2)
1. a high-voltage power capacitor, it comprises a mandrel, on described mandrel, be wound with two conductor pole plates, described in two, between conductor pole plate, be provided with an insulating barrier, it is characterized in that, the material of described insulating barrier is polypropylene film, described polypropylene film has two-layer, every layer of described polypropylene film comprises that a film bulk and is located at the surperficial roughened layer of described film bulk, described roughened layer is only arranged at upper surface or the lower surface of described film bulk, described roughened layer and described film bulk are one-body molded, the thickness of described polypropylene film is 10.0～20.0 μ m, the thickness of described roughened layer be described polypropylene film thickness 3.5%～5%.
2. high-voltage power capacitor as claimed in claim 1, is characterized in that, the dielectric coefficient of described polypropylene film is 2.1～2.3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420291707.8U CN203950687U (en) | 2014-06-03 | 2014-06-03 | high-voltage power capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420291707.8U CN203950687U (en) | 2014-06-03 | 2014-06-03 | high-voltage power capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203950687U true CN203950687U (en) | 2014-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420291707.8U Expired - Fee Related CN203950687U (en) | 2014-06-03 | 2014-06-03 | high-voltage power capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203950687U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107221433A (en) * | 2017-05-09 | 2017-09-29 | 柯利佳 | A kind of high-voltage power capacitor |
| CN112071641A (en) * | 2020-09-29 | 2020-12-11 | 苏州泰思特电子科技有限公司 | Peaking capacitor |
-
2014
- 2014-06-03 CN CN201420291707.8U patent/CN203950687U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107221433A (en) * | 2017-05-09 | 2017-09-29 | 柯利佳 | A kind of high-voltage power capacitor |
| CN112071641A (en) * | 2020-09-29 | 2020-12-11 | 苏州泰思特电子科技有限公司 | Peaking capacitor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141119 Termination date: 20210603 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |