CN203013524U - High voltage capacitor having concave-structure glass ceramic core - Google Patents
High voltage capacitor having concave-structure glass ceramic core Download PDFInfo
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- CN203013524U CN203013524U CN 201220666918 CN201220666918U CN203013524U CN 203013524 U CN203013524 U CN 203013524U CN 201220666918 CN201220666918 CN 201220666918 CN 201220666918 U CN201220666918 U CN 201220666918U CN 203013524 U CN203013524 U CN 203013524U
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- glass ceramics
- high voltage
- concave
- porcelain core
- voltage capacitor
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Abstract
The utility model provides a high voltage capacitor having a concave-structure glass ceramic core. The high voltage capacitor comprises a ceramic core and metal terminals, wherein the ceramic core comprises two concave glass ceramic discs connected in series, upper and lower surfaces of the two concave glass ceramic discs are respectively coated with silver electrodes, concave silver electrodes of the two concave glass ceramic discs are respectively welded with the metal terminals, an integral body formed by the ceramic core and the metal terminals is sealed by epoxy resin, and end portions of the metal terminals are exposed at an outer side of an epoxy resin layer. The high voltage capacitor solves a problem of electric field concentration at electrode edge, reduces breakdown probability at the electrode edge, greatly improves voltage resistance performance and reliability of the high voltage ceramic capacitor, further reduces a volume and can be applied to the high voltage fields of high voltage power transmission, pulse power and dual voltage rectification.
Description
Technical field
The utility model relates to a kind of high-voltage capacitor with concave structure glass ceramics porcelain core, belongs to capacitor area.
Background technology
High voltage ceramic capacitor is one of indispensable electronic component in the high-tension apparatuses such as high voltage power transmission, alternating current-direct current high voltage source and high power pulse equipment.Along with the development of high-tension apparatus miniaturization, lightness, high-voltage capacitor has been proposed harsher requirement, this just requires capacitor to have higher voltage endurance.The quality of the withstand voltage properties of capacitor depends primarily on the quality of capacitor porcelain core quality.The dull and stereotyped wafer type structure of the many employings of high voltage ceramic capacitor porcelain core at present, full silver electrode is fired on upper and lower surface, then make electrode edge smooth by polishing, the electrode for capacitors fringe field of this structure is concentrated, in use the overwhelming majority is all to cause capacitor to lose efficacy because electrode edge punctures, and has seriously restricted the performance of high voltage ceramic capacitor performance.
Niobates or titanate ferroelectric glass ceramics are as a class Novel high voltage capacitor medium, have the incomparable advantage of other sintered ceramics: at first sintered ceramic is owing to adopting high temperature solid-phase sintering technique, can't eliminate hole fully causes disruptive field intensity lower, and glass ceramics adopts the preparation technology who is different from sintered ceramic fully, by high-temperature fusion-casting-crystallization heat treatment process, can prepare fully dense glass ceramics medium, disruptive field intensity can reach 40～50kV/mm, is 4～5 times of cemented iron electroceramics.Secondly sintered ceramic adopts powder pressing forming-high temperature solid-phase sintering technique to prepare ceramic body, be subjected to compressing process technology limit, be difficult to the ceramic body of preparation labyrinth, and glass ceramics is owing to being the employing casting molding process, can be easy to by the design one time to produce arbitrary shape of metal casting mould and the glass ceramic body of size, show good application prospect in the high voltage ceramic capacitor field.
The utility model content
The purpose of this utility model is to provide a kind of high-voltage capacitor with concave structure glass ceramics porcelain core, and this high-voltage capacitor has high disruptive field intensity, has solved simultaneously the problem that the electrode edge electric field is concentrated.
For achieving the above object, the utility model is by the following technical solutions:
A kind of high-voltage capacitor with concave structure glass ceramics porcelain core, comprise porcelain core and metal terminal, this porcelain core comprises two matrix glass ceramics disks of series connection mutually, the upper and lower surface of these two matrix glass ceramics disks all is coated with silver electrode, the concave surface silver electrode of these two matrix glass ceramics disks is the weld metal terminal respectively, the integral body that porcelain core and metal terminal consist of is by epoxy resin encapsulated, and the end of metal terminal is exposed to the outside of epoxy resin layer.
The upper and lower surface of described matrix glass ceramics disk is covered with silver electrode, and the edge of silver electrode polishes smooth.
Adopt silver slurry or Pb-Sn scolder to connect between described two matrix glass ceramics disks.
In addition, also can be in series with plate glass ceramics disk more than 1 or 1 between described two matrix glass ceramics disks, the surface of this plate glass ceramics disk is coated with silver electrode.
The upper and lower surface of described matrix or plate glass ceramics disk is covered with silver electrode, and the edge of silver electrode polishes smooth.
Adopt silver slurry or Pb-Sn scolder to be connected between described matrix glass ceramics disk and plate glass ceramics disk and between adjacent two plate glass ceramics disks.
The side of described matrix glass ceramics disk is straight flange or toothed edge.
The utility model has the advantage of:
The utility model adopts concave structure glass ceramics porcelain core, increased the thickness at porcelain core edge, solved the problem that the electrode edge electric field is concentrated, reduced the probability that electrode edge punctures, withstand voltage properties and the reliability of high voltage ceramic capacitor have been increased substantially, volume further dwindles, and can be applicable to high voltage power transmission, pulse power, the contour voltage domain of voltage multiplying rectifier.
Description of drawings
Fig. 1 is the sectional view of a kind of high-voltage capacitor structure of the present utility model.
Fig. 2 is the sectional view of another kind of high-voltage capacitor structure of the present utility model.
Fig. 3 is the sectional view of another high-voltage capacitor structure of the present utility model.
Embodiment
Below by embodiment, the utility model is described further.
As shown in Figure 1, high-voltage capacitor of the present utility model, comprise porcelain core and metal terminal, this porcelain core comprises two matrix glass ceramics disks 1,2 of series connection mutually, this matrix glass ceramics disk is niobates or titanate ferroelectric glass ceramics material, adopts melting-casting-crystallization heat treatment process one time to produce moulding.Adopt silver slurry or Pb-Sn scolder to connect between two matrix glass ceramics disks 1,2.The upper and lower surface of these two matrix glass ceramics disks 1,2 is covered with silver electrode, and the edge of silver electrode polishes smooth.Metal terminal 5,6 is welded on the concave surface silver electrode 3,4 of two matrix glass ceramics disks 1,2, and the integral body that porcelain core and metal terminal consist of is by epoxy resin 7 embeddings, and metal terminal 5,6 end are exposed to the outside of epoxy resin 7.
As shown in Figure 2, can also be in series with plate glass ceramics disk 8 more than 1 or 1 between two matrix glass ceramics disks 1, this plate glass ceramics disk is niobates or titanate ferroelectric glass ceramics material, adopts melting-casting-crystallization heat treatment process one time to produce moulding.The surface of this plate glass ceramics disk 8 is covered with silver electrode, and the edge of silver electrode polishes smooth.Adopt silver slurry or scolder to be connected between matrix glass ceramics disk 1,2 and plate glass ceramics disk 8.More than 1 during plate glass ceramics disk, also adopt silver slurry or scolder to connect when series connection between two matrix glass ceramics disks 1,2 between adjacent two plate glass ceramics disks.
As shown in Figure 1, 2, the side of matrix glass ceramics disk 1,2 is the straight flange that polishes smooth, and perhaps as shown in Figure 3, the side of matrix glass ceramics disk 1,2 is toothed edge.
High-voltage capacitor dc breakdown field intensity with concave structure glass ceramics porcelain core of the present utility model can reach 58kV/mm, breakdown point occurs in the concave surface inside of matrix glass ceramics disk, greatly reduce the probability that electrode edge punctures, improved the reliability of high voltage ceramic capacitor.
Claims (7)
1. high-voltage capacitor with concave structure glass ceramics porcelain core, it is characterized in that, comprise porcelain core and metal terminal, this porcelain core comprises two matrix glass ceramics disks of series connection mutually, the upper and lower surface of these two matrix glass ceramics disks all is coated with silver electrode, the concave surface silver electrode of these two matrix glass ceramics disks is the weld metal terminal respectively, and the integral body that porcelain core and metal terminal consist of is by epoxy resin encapsulated, and the end of metal terminal is exposed to the outside of epoxy resin layer.
2. the high-voltage capacitor with concave structure glass ceramics porcelain core according to claim 1, is characterized in that, the upper and lower surface of described matrix glass ceramics disk is covered with silver electrode, and the edge of silver electrode polishes smooth.
3. the high-voltage capacitor with concave structure glass ceramics porcelain core according to claim 1, is characterized in that, adopts silver slurry or Pb-Sn scolder to connect between described matrix glass ceramics disk.
4. the high-voltage capacitor with concave structure glass ceramics porcelain core according to claim 1, it is characterized in that, be in series with plate glass ceramics disk more than 1 or 1 between described two matrix glass ceramics disks, the surface of this plate glass ceramics disk is coated with silver electrode.
5. the high-voltage capacitor with concave structure glass ceramics porcelain core according to claim 4, is characterized in that, the upper and lower surface of described matrix or plate glass ceramics disk is covered with silver electrode, and the edge of silver electrode polishes smooth.
6. the high-voltage capacitor with concave structure glass ceramics porcelain core according to claim 4, it is characterized in that, adopt silver slurry or Pb-Sn scolder to be connected between described matrix glass ceramics disk and plate glass ceramics disk and between adjacent two plate glass ceramics disks.
7. according to claim 1～6 described high-voltage capacitors with concave structure glass ceramics porcelain core, is characterized in that, the side of described matrix glass ceramics disk is straight flange or toothed edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220666918 CN203013524U (en) | 2012-12-06 | 2012-12-06 | High voltage capacitor having concave-structure glass ceramic core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220666918 CN203013524U (en) | 2012-12-06 | 2012-12-06 | High voltage capacitor having concave-structure glass ceramic core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203013524U true CN203013524U (en) | 2013-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220666918 Expired - Lifetime CN203013524U (en) | 2012-12-06 | 2012-12-06 | High voltage capacitor having concave-structure glass ceramic core |
Country Status (1)
| Country | Link |
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| CN (1) | CN203013524U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167290A (en) * | 2014-08-28 | 2014-11-26 | 鞍山奇发电子陶瓷科技有限公司 | Concave dual-electrode integrated chip high-voltage ceramic capacitor and manufacturing process thereof |
| CN107680804A (en) * | 2017-09-26 | 2018-02-09 | 北京智罗盘智能电气有限公司 | A kind of tubulose high voltage ceramic capacitor with umbrella skirt construction |
| CN108155015A (en) * | 2018-01-23 | 2018-06-12 | 北京智罗盘智能电气有限公司 | A kind of NPO high voltage ceramic capacitors with dual redundant, small tolerance |
-
2012
- 2012-12-06 CN CN 201220666918 patent/CN203013524U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167290A (en) * | 2014-08-28 | 2014-11-26 | 鞍山奇发电子陶瓷科技有限公司 | Concave dual-electrode integrated chip high-voltage ceramic capacitor and manufacturing process thereof |
| CN107680804A (en) * | 2017-09-26 | 2018-02-09 | 北京智罗盘智能电气有限公司 | A kind of tubulose high voltage ceramic capacitor with umbrella skirt construction |
| CN108155015A (en) * | 2018-01-23 | 2018-06-12 | 北京智罗盘智能电气有限公司 | A kind of NPO high voltage ceramic capacitors with dual redundant, small tolerance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190621 Address after: 101407 No. 11 Xingke East Street, Yanqi Economic Development Zone, Huairou District, Beijing Patentee after: YOUYAN ENGINEERING TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. Address before: No. 2, Xinjie street, Xicheng District, Beijing, Beijing Patentee before: General Research Institute for Nonferrous Metals |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130619 |
|
| CX01 | Expiry of patent term |