CN204407186U - A kind of capacitor MULTILAYER COMPOSITE dielectric film - Google Patents
A kind of capacitor MULTILAYER COMPOSITE dielectric film Download PDFInfo
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- CN204407186U CN204407186U CN201420560744.4U CN201420560744U CN204407186U CN 204407186 U CN204407186 U CN 204407186U CN 201420560744 U CN201420560744 U CN 201420560744U CN 204407186 U CN204407186 U CN 204407186U
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Abstract
The utility model relates to a kind of capacitor MULTILAYER COMPOSITE dielectric film, be made up of four-level membrane, be respectively ground floor film, second layer film, third layer film and four-level membrane, described second layer film and third layer film are between described ground floor film and four-level membrane, described second layer film is positioned at below described ground floor film, described ground floor film and third layer film top layer are respectively equipped with first coat of metal and second coat of metal, and described first coat of metal and the second coat of metal width are less than four-level membrane width.The beneficial effects of the utility model are: the utility model, in conjunction with both different characteristics of PET film and PP film, enables this mixed dielectric capacitor be applicable to high-frequency, high voltage, requires the use under high accuracy capacity occasion; Owing to increasing second layer film and the two-layer smooth film of four-level membrane, the withstand voltage properties of its capacitor can be increased.
Description
Technical field
The utility model relates to capacitor film technical field, specifically a kind of capacitor MULTILAYER COMPOSITE dielectric film.
Background technology
Tension plastic film capacitor is the one in capacitor product, and it is a kind of capacitor of superior performance, and it has following characteristic: nonpolarity, and insulation impedance is very high, frequency characteristic excellence (frequency response is broad), and medium coefficient is very little.Tension plastic film capacitor is large due to volume low capacity, therefore has been widely used, can do the product of different series, as high energy storage capacitor, electromagnetism interference capacitor, safety film capacitor, AC starting capacitor, high frequency high voltage capacitor, power capacitor etc.
The version of tension plastic film capacitor mainly contains two kinds, one take metal forming as electrode, plastic film does media roll around the film capacitor made together, another kind be plastic film surface use vacuum evaporation technology metal material is attached to above and the capacitor made.Evaporation is equivalent to electrode at the metal level of film surface, less than the capacitor volume of foil structure, and capacity is larger, uses now tension plastic film capacitor all to produce according to metallization structure.
Be no matter the capacitor of foil structure or metallization structure, the electric property of capacitor generally has four major parameters: nominal capacity and deviation, loss angle, insulation resistance, rated voltage, except above four major parameters, also has important parameter to be exactly the temperature coefficient of capacitance.The capacitance of true capacitor changes along with variations in temperature, and when the temperature increases, some capacitances can become large, are called the capacitor of positive temperature coefficient; What have then diminishes, and is called the capacitor of negative temperature coefficient.
Material the most frequently used is at present PET and PP two kinds, PET material is the capacitor belonging to positive temperature coefficient, PP material is then the capacitor belonging to negative temperature coefficient, the requirement of high accuracy capacity (capacity variation with temperature is very little) all cannot be met to be used alone this bi-material, the condenser capacity precision that some material is made is also high, but cost can be very high.
Summary of the invention
Technical problem to be solved in the utility model be to provide a kind of capacitor capacity can variation with temperature amount little, the capacitor MULTILAYER COMPOSITE dielectric film of stable performance.
The technical scheme in the invention for solving the above technical problem is:
A kind of capacitor MULTILAYER COMPOSITE dielectric film, be made up of four-level membrane, be respectively ground floor film, second layer film, third layer film and four-level membrane, described ground floor film, second layer film, third layer film is equal with four-level membrane width, described second layer film and third layer film are between described ground floor film and four-level membrane, described second layer film is positioned at below described ground floor film, described ground floor film and third layer film top layer are respectively equipped with first coat of metal and second coat of metal, described first coat of metal and the second coat of metal width are less than four-level membrane width, described first coat of metal left side edge flushes with ground floor film left side edge, described second coat of metal right side edge flushes with third layer film right side edge.
As optimal way, described ground floor film and third layer film are polyester film, and second layer film and four-level membrane are polypropylene screen.
As optimal way, described first coat of metal and the second metal layer thickness are respectively the 0.4-0.6 of ground floor film and four-level membrane thickness doubly.
A kind of capacitor, comprises by the capacitor core of above-mentioned capacitor MULTILAYER COMPOSITE dielectric film coiling.
The beneficial effects of the utility model are: the utility model, in conjunction with both different characteristics of PET film and PP film, enables this mixed dielectric capacitor be applicable to high-frequency, high voltage, requires the use under high accuracy capacity occasion; Owing to increasing second layer film and the two-layer smooth film of four-level membrane, the withstand voltage properties of its capacitor can be increased; High voltage can be used in, high frequency oscillation circuit, as LED outdoor road lamp etc. varies with temperature little occasion etc. to capacity requirement.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is schematic diagram of the present utility model.
In figure: 1, ground floor film; 2, second layer film; 3, second coat of metal; 4, third layer film; 5, first coat of metal; 6, four-level membrane.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described further:
As shown in Figure 1, a kind of capacitor MULTILAYER COMPOSITE dielectric film, be made up of four-level membrane, be respectively ground floor film 1, second layer film 2, third layer film 4 and four-level membrane 6, described ground floor film 1, second layer film 2, third layer film 4 is equal with four-level membrane 6 width, described second layer film 2 and third layer film 4 are between described ground floor film 1 and four-level membrane 6, described second layer film 2 is positioned at below described ground floor film 1, described ground floor film 1 is respectively equipped with first coat of metal 5 and second coat of metal 3 with third layer film 4 top layer, described first coat of metal 5 and the second coat of metal 3 width are less than four-level membrane width, described first coat of metal 5 left side edge flushes with ground floor film 1 left side edge, described second coat of metal 3 right side edge flushes with third layer film 4 right side edge.
Described ground floor film 1 is polyester film with third layer film 4, and second layer film 2 and four-level membrane 6 are polypropylene screen.Described first coat of metal 5 and the second coat of metal 3 thickness are respectively the 0.4-0.6 of ground floor film 1 and four-level membrane 6 thickness doubly.
A kind of capacitor, comprises by the capacitor core of above-mentioned capacitor MULTILAYER COMPOSITE dielectric film coiling.
The capacitor of MULTILAYER COMPOSITE dielectric film is adopted to show superior capacity high stability, and high voltage withstanding, high frequency tolerant rate.Experiment shows, under the condition of same high-temperature 120 DEG C: the Capacitance Shift Rate of mixed dielectric capacitor is about 1.5%; The condenser capacity rate of change adopting PP film is about 3%; The condenser capacity rate of change adopting PET film is about 10%; Under the condition of same low temperature-40 DEG C: the Capacitance Shift Rate adopting composite dielectric film is about 0.1%; The condenser capacity rate of change adopting PP film is about 1%, and the condenser capacity rate of change adopting PET film is about 2%.The requirement adopting multi-layer compound film dielectric capacitor can meet use can be found out from above experiment.
More than show and describe general principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (3)
1. a capacitor MULTILAYER COMPOSITE dielectric film, it is characterized in that: be made up of four-level membrane, be respectively ground floor film, second layer film, third layer film and four-level membrane, described ground floor film, second layer film, third layer film is equal with four-level membrane width, described second layer film and third layer film are between described ground floor film and four-level membrane, described second layer film is positioned at below described ground floor film, described ground floor film and third layer film top layer are respectively equipped with first coat of metal and second coat of metal, described first coat of metal and the second coat of metal width are less than four-level membrane width, described first coat of metal left side edge flushes with ground floor film left side edge, described second coat of metal right side edge flushes with third layer film right side edge.
2. a kind of capacitor MULTILAYER COMPOSITE dielectric film according to claim 1, is characterized in that: described ground floor film and third layer film are polyester film, and second layer film and four-level membrane are polypropylene screen.
3. a kind of capacitor MULTILAYER COMPOSITE dielectric film according to claim 1, is characterized in that: described first coat of metal and the second metal layer thickness are respectively the 0.4-0.6 of ground floor film and four-level membrane thickness doubly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420560744.4U CN204407186U (en) | 2014-09-27 | 2014-09-27 | A kind of capacitor MULTILAYER COMPOSITE dielectric film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420560744.4U CN204407186U (en) | 2014-09-27 | 2014-09-27 | A kind of capacitor MULTILAYER COMPOSITE dielectric film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204407186U true CN204407186U (en) | 2015-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420560744.4U Expired - Fee Related CN204407186U (en) | 2014-09-27 | 2014-09-27 | A kind of capacitor MULTILAYER COMPOSITE dielectric film |
Country Status (1)
| Country | Link |
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| CN (1) | CN204407186U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108878146A (en) * | 2018-07-03 | 2018-11-23 | 广东捷威电子有限公司 | A kind of metallized film box type capacitor of anti-interference, low ESR |
| WO2022174559A1 (en) * | 2021-02-20 | 2022-08-25 | 南方电网科学研究院有限责任公司 | Capacitor element and capacitor |
-
2014
- 2014-09-27 CN CN201420560744.4U patent/CN204407186U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108878146A (en) * | 2018-07-03 | 2018-11-23 | 广东捷威电子有限公司 | A kind of metallized film box type capacitor of anti-interference, low ESR |
| WO2022174559A1 (en) * | 2021-02-20 | 2022-08-25 | 南方电网科学研究院有限责任公司 | Capacitor element and 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: 20150617 Termination date: 20150927 |
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| EXPY | Termination of patent right or utility model |