CN201060743Y - Dry type compound medium inner series structure pulse capacitor - Google Patents
Dry type compound medium inner series structure pulse capacitor Download PDFInfo
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- CN201060743Y CN201060743Y CNU2007200399479U CN200720039947U CN201060743Y CN 201060743 Y CN201060743 Y CN 201060743Y CN U2007200399479 U CNU2007200399479 U CN U2007200399479U CN 200720039947 U CN200720039947 U CN 200720039947U CN 201060743 Y CN201060743 Y CN 201060743Y
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- pulse capacitor
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Abstract
The utility model discloses a dry composite medium internal-connection pulse capacitor, comprising a capacitance core, an extraction electrode and an epoxy resin encapsulation layer. The utility model is characterized in the layer structure of the capacitance core: two polar plates are made of aluminum foil; an organic film strip is arranged between the polar plates; an organic film layer coated with a metal layer on the lower surface and an organic film layer are arranged under the polar plates. The utility model has the advantages of large conductive cross-sectional area, large bearable current, high energy density, and applicability to the working state of high repetition frequency and large impact current.
Description
Technical field
The utility model relates to string structure pulse capacitor in a kind of dry-type composite-dielectric, is applicable to the repetition rate height, and the pulse operation circuit of big discharging current is as fields such as high power microwave weapon, radar, laser and environmental protection equipment, Medical Devices.
Background technology
At present, domestic pulse capacitor mainly contains dual mode: a kind of is to be medium with organic film (as polypropylene film or polyester film etc.), aluminium foil (thickness is about 7 μ m) is the paper tinsel formula structure capacitive device of pole plate, this kind capacitor advantage is that aluminium foil is as pole plate, conductive cross-sectional area is big, can bear heavy current impact, shortcoming is that the work field intensity of film is lower, energy storage density is low, volume is big, simultaneously must adopt insulating oil (being generally low temperature diarylethane insulating oil) impregnation technology, have the hidden danger of capacitor seepage oil.Another kind is to be medium with metallized organic film (as metallized polypropylene film or metallized polyester film etc.), utilize the coat of metal of evaporation on film (to be generally allumen, thickness is 10～50nm) to be the metallization film capacitor of pole plate, the advantage of this kind capacitor is that dry type do not have oily structure, metallized film has " self-healing " characteristic, the work field intensity height of film, the energy storage density height, volume is little, shortcoming is the coat of metal as pole plate, and conductive cross-sectional area is little, and the electric current that can bear is little, be not suitable for the repetition rate height, the operating state of large impact electric current.
The utility model content
The utility model is intended to be optimized by the structure to existing pulse capacitor, fully utilize the advantage of above-mentioned two kinds of structure capacitive devices, a kind of dry construction is provided, the energy storage density height, volume is little, simultaneously the repetition rate height can be applicable to, the interior string structure pulse capacitor of dry-type composite-dielectric of large impact electric current can be born.
Technical solutions of the utility model are as follows:
String structure pulse capacitor in the dry-type composite-dielectric, include capacitor core, extraction electrode and epoxy resin embedding layer, the layer structure that it is characterized in that described capacitor core is: pole plate is an aluminium foil, be separated with the organic film bar between the pole plate, the pole plate below is followed successively by organic thin film layer and the organic thin film layer that lower surface is coated with metal level.
Described metallized organic film layer has the coat of metal for the organic film surface.
Described organic film is polypropylene film or polyester film.
The described coat of metal is a zinc aluminum alloy coating.
As the complex media material, aluminium foil is as pole plate with metallized polypropylene film and polypropylene film for the utility model pulse capacitor, and the frame mode by interior string is wound into capacitor core.Can utilize metallized polypropylene film to have " self-healing " characteristic with metallized polypropylene film and polypropylene film as the complex media material, the energy storage density height, the advantage that volume is little, can utilize the advantage that aluminium foil can bearing great current with aluminium foil as pole plate, the frame mode of interior string has guaranteed that then capacitor makes full use of above-mentioned two advantages simultaneously.
After coiling is finished, can be according to actual needs, selection keeps capacitor core cylindrical or will carry out heat setting after the capacitor core flattening, promptly after storing certain hour under the higher temperature, the characteristic of utilizing metallized polypropylene film and polypropylene film at high temperature to shrink is discharged the air between film and the film, can improve the puncture voltage of capacitor, reduce the dielectric loss of capacitor.
After the capacitor core heat setting,, promptly utilize high temperature that metal (being generally pure zinc silk) is melted the back and be sprayed on aluminium foil surface, but form the weld metal layers of one deck densification, be convenient to capacitor core welding extraction electrode with high pressure draught at two end face metal sprayings that aluminium foil exposes.Because pulse capacitor can produce heat at high repetition frequency, big current work state, then can cause capacitor generation thermal breakdown phenomenon as temperature is too high, so extraction electrode is designed to special version, bigger contact area arranged with gilding layer, and firm welding, being convenient to derives heat.
After the extraction electrode welding is finished, capacitor core is put into particular manufacturing craft, carry out whole embedding, both guaranteed the dielectric strength of capacitor, also guaranteed the safe handling of capacitor under mal-condition simultaneously with room temperature curing epoxy.
Description of drawings
Fig. 1 is the utility model capacitor core coiling cross-sectional view.
Fig. 2 is the utility model structural representation.
Embodiment
Consult Fig. 1, shown in Figure 2, the utility model pulse capacitor is made up of capacitor core 7, extraction electrode 5 and epoxy resin embedding layer 6.
As complex media, the metal-plated laminating polypropylene film 2 to capacitor core 7 by the polypropylene film 1 that is coated with metal level (allumen layer) and polypropylene film 2, and aluminium foil 3 is reeled by string structure mode in the diagram as pole plate and formed.The capacitor core heat setting is promptly after uniform temperature stores certain hour, metal spraying is carried out at its two ends to be handled, gilding layer 4 must cover aluminium foil 3 fully, so that welding extraction electrode 5, the bottom area of extraction electrode 5 must be bigger, and extraction electrode 5 is fully contacted with gilding layer 4, can reduce contact resistance on the one hand, reduce loss, the heat directed outwards that produces in the time of pulse capacitor can being worked on the one hand.Behind capacitor core 7 metal sprayings, extraction electrode 5 is welded on the gilding layer 4 of capacitor core, welding must guarantee evenly and firmly, can not destroy gilding layer 4.After extraction electrode 5 welding are finished, capacitor core is put into particular manufacturing craft, carry out whole embedding with room temperature curing epoxy, form epoxy resin embedding layer 6, epoxy resin cure technology must adopt cold curing technology or curing temperature to surpass 90 ℃, and the too high meeting of temperature causes the metallized polypropylene film 1 and the insulation property of polypropylene film 2 to reduce.
Claims (4)
1. string structure pulse capacitor in the dry-type composite-dielectric, include capacitor core, extraction electrode and epoxy resin embedding layer, the layer structure that it is characterized in that described capacitor core is: pole plate is an aluminium foil, be separated with the organic film bar between the pole plate, the pole plate below is followed successively by organic thin film layer and the organic thin film layer that lower surface is coated with metal level.
2. string structure pulse capacitor in the dry-type composite-dielectric according to claim 1 is characterized in that described metallized organic film layer has the coat of metal for the organic film surface.
3. string structure pulse capacitor in the dry-type composite-dielectric according to claim 1 is characterized in that described organic film is polypropylene film or polyester film.
4. string structure pulse capacitor in the dry-type composite-dielectric according to claim 2 is characterized in that the described coat of metal is a zinc aluminum alloy coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200399479U CN201060743Y (en) | 2007-06-06 | 2007-06-06 | Dry type compound medium inner series structure pulse capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200399479U CN201060743Y (en) | 2007-06-06 | 2007-06-06 | Dry type compound medium inner series structure pulse capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201060743Y true CN201060743Y (en) | 2008-05-14 |
Family
ID=39409229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200399479U Expired - Lifetime CN201060743Y (en) | 2007-06-06 | 2007-06-06 | Dry type compound medium inner series structure pulse capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201060743Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102509612A (en) * | 2011-10-11 | 2012-06-20 | 江苏通驰自动化系统有限公司 | Power electronic capacitor |
| CN103337363A (en) * | 2013-06-05 | 2013-10-02 | 广西华赣电力设备有限公司 | An energy storage pulse capacitor |
| CN107393717A (en) * | 2017-07-18 | 2017-11-24 | 中国工程物理研究院流体物理研究所 | A kind of high-voltage pulse capacitor |
-
2007
- 2007-06-06 CN CNU2007200399479U patent/CN201060743Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102509612A (en) * | 2011-10-11 | 2012-06-20 | 江苏通驰自动化系统有限公司 | Power electronic capacitor |
| CN102509612B (en) * | 2011-10-11 | 2014-06-25 | 南京因诺沃经济信息咨询有限公司 | Power electronic capacitor |
| CN103337363A (en) * | 2013-06-05 | 2013-10-02 | 广西华赣电力设备有限公司 | An energy storage pulse capacitor |
| CN103337363B (en) * | 2013-06-05 | 2018-03-13 | 广西华赣电力设备有限公司 | A kind of energy-storage pulsed capacitor |
| CN107393717A (en) * | 2017-07-18 | 2017-11-24 | 中国工程物理研究院流体物理研究所 | A kind of high-voltage pulse capacitor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080514 |
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| CX01 | Expiry of patent term |