CN204497063U - The solid-state coupling capacitor of a kind of high-voltage large-capacity based on glass ceramics medium - Google Patents
The solid-state coupling capacitor of a kind of high-voltage large-capacity based on glass ceramics medium Download PDFInfo
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- CN204497063U CN204497063U CN201420869974.9U CN201420869974U CN204497063U CN 204497063 U CN204497063 U CN 204497063U CN 201420869974 U CN201420869974 U CN 201420869974U CN 204497063 U CN204497063 U CN 204497063U
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Abstract
The utility model discloses the solid-state coupling capacitor of a kind of high-voltage large-capacity based on glass ceramics medium belonging to power capacitor technical field.This coupling capacitor comprises glass ceramics dieelctric sheet, silver electrode, metal lead wire, electrode terminal, epoxy resin enclosed layer and metal insert; Wherein, glass ceramics dieelctric sheet adopt have high-k and high breakdown field strength glass ceramics preparation, upper and lower surface fire silver electrode and all through polishing, polishing; Glass ceramics dieelctric sheet realizes being connected in parallel by metal lead wire, and the overall epoxy resin that adopts is encapsulated, and surface, top is metal insert and electrode terminal.The high frequency carrier communication of electric power system can be applied to, protection and power equipment Survey control, electric energy draw-out device, office put the aspects such as measurement, there is miniaturization, feature that solid state, low office put.
Description
Technical field
The utility model belongs to power capacitor technical field, especially relates to the solid-state coupling capacitor of a kind of high-voltage large-capacity based on glass ceramics medium.
Background technology
Coupling capacitor is widely used in the high frequency carrier communication of electric power system and measurement, carrier current protection field, has important effect.Conventional coupling capacitance is all flood organic synthetic as medium by polypropylene film and kraft capacitor paper compound in the market, this impregnated insulating material causes the life expectancy of device not grow (especially under outdoor high-voltage environment), and the existence of oil based media adds the risk that instrument transformer catches fire and explode; Comparatively speaking, ceramic-like high-voltage capacitor is owing to having the advantages such as size is little, stability is high, the life-span is long, if all solid state high voltage ceramic capacitor can be adopted to replace oil immersion film or Paper-film capacitor, to be once improvement and the upgrading of high-tension coupling condenser, meet the growth requirement of electric power system non-oil ultra high vacuum system, high reliability.But there is capacitance little (usually only having several nF), temperature stability is poor, partial discharge quantity is large shortcoming in current conventional high-tension sintered ceramic capacitor, is difficult to the performance requirement meeting electrical network high-tension coupling condenser.Sintered ceramic capacitor traditional at present also comes with some shortcomings part performance, be difficult to the instructions for use reaching high-tension coupling condenser: (1) high voltage ceramic capacitor capacity is little, although dielectric ceramic has the dielectric constant (up to several thousand) far above film, but be limited to technology of preparing and the parallel technology of large-size ceramic, be difficult to realize Large Copacity, particularly under voltage levels.The capacity of usual high voltage ceramic capacitor at hundreds of pF to several nF; (2) temperature stability is poor, and as the high-tension coupling condenser major applications of electrical network in open air, difference variation is larger, and within the scope of operating ambient temperature, requires that the Capacitance Shift Rate of capacitor is little.Current sintered ceramic capacitor is within the scope of the serviceability temperature of-30 DEG C to+85 DEG C, and rate of change, usually between 20%-30%, can not meet application requirement; (3) partial discharge quantity is large, as electric power system high pressure coupling condenser, requires that capacitor has low office and puts under operating voltage, is usually less than 10pC.At present, sintered ceramic capacitor is owing to adopting high-sintering process preparation, and be difficult to eliminate hole completely, make sintered ceramic capacitor realize zero innings and put, difficulty is very large.The utility model proposes the solid-state coupling capacitor of a kind of high-voltage large-capacity based on glass ceramics medium, achieve the non-oil ultra high vacuum system of coupling capacitor, miniaturization, low office put.
Utility model content
In order to solve the deficiency that current conventional high-tension sintered ceramic condenser capacity is little, temperature stability is poor, partial discharge quantity is large, the utility model proposes the solid-state coupling capacitor of a kind of high-voltage large-capacity based on glass ceramics medium, it is characterized in that, this coupling capacitor comprises glass ceramics dieelctric sheet 1, silver electrode 2, metal lead wire 3, electrode terminal 4, epoxy resin enclosed layer 5, metal insert 6; Wherein, glass ceramics dieelctric sheet 1 is in the form of annular discs, and silver electrode 2 fires the upper and lower surface at glass ceramics dieelctric sheet 1; Divided glass ceramic dielectric sheet 1 is welded to connect by metal lead wire 3, glass ceramics dieelctric sheet 1 upper surface electrode is linked together by metal lead wire 3 and is welded to the upper terminal of electrode terminal 4, glass ceramics dieelctric sheet 1 lower surface electrode is linked together by metal lead wire 3 and is welded to the lower terminal of electrode terminal 4, forms symmetrical parallel-connection structure; Epoxy resin enclosed layer 5 is adopted to carry out solid encapsulation to whole parallel-connection structure; Metal insert 6 is installed on the upper surface of glass ceramics dieelctric sheet 1.
Described glass ceramics dieelctric sheet 1 is niobates system glass ceramics, and niobates system glass ceramics is a kind of fully dense complex phase dielectric material, comprises the ceramic phase of high-k and the glassy phase of high breakdown field strength, and ceramic phase is NaNbO
3(Pb, Ba, Sr) Nb
2o
6, glassy phase is SiO
2.
The beneficial effects of the utility model are, the solid-state coupling capacitor of a kind of high-voltage large-capacity based on glass ceramics medium is proposed, adopt glass ceramics medium as coupling capacitor medium, Large Copacity is achieved by parallel-connection structure, adopt epoxy encapsulation simultaneously, achieve solid state, the low office reaching coupling capacitor put, the target of non-maintaining and non-oil ultra high vacuum system.
Accompanying drawing explanation
Fig. 1 is the sectional view of the solid-state coupling capacitor of high-voltage large-capacity based on glass ceramics medium;
Number in the figure:
1-glass ceramics dieelctric sheet, 2-silver electrode, 3-metal lead wire, 4-electrode terminal, the epoxy resin enclosed layer of 5-, 6-metal insert.
Fig. 2 is the temperature characteristic of capacitance schematic diagram of glass ceramics medium of the present utility model.
Embodiment
The utility model proposes the solid-state coupling capacitor of a kind of high-voltage large-capacity based on glass ceramics medium, below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
Figure 1 shows that the sectional view of the solid-state coupling capacitor of high-voltage large-capacity based on glass ceramics medium, this coupling capacitor comprises glass ceramics dieelctric sheet 1, silver electrode 2, metal lead wire 3, electrode terminal 4, epoxy resin enclosed layer 5, metal insert 6; Wherein, glass ceramics dieelctric sheet 1 is in the form of annular discs, and silver electrode 2 fires the upper and lower surface at glass ceramics dieelctric sheet 1; Divided glass ceramic dielectric sheet 1 is welded to connect by metal lead wire 3, glass ceramics dieelctric sheet 1 upper surface electrode is linked together by metal lead wire 3 and is welded to the upper terminal of electrode terminal 4, glass ceramics dieelctric sheet 1 lower surface electrode is linked together by metal lead wire 3 and is welded to the lower terminal of electrode terminal 4, forms symmetrical parallel-connection structure; Epoxy resin enclosed layer 5 is adopted to carry out solid encapsulation to whole parallel-connection structure; Metal insert 6 is installed on the upper surface of glass ceramics dieelctric sheet 1.
Wherein, glass ceramics dieelctric sheet 1 is niobates system glass ceramics, and niobates system glass ceramics is a kind of fully dense complex phase dielectric material, comprises the glassy phase of high-dielectric-constant ceramics phase and high breakdown field strength, and ceramic phase is NaNbO
3(Pb, Ba, Sr) Nb
2o
6, glassy phase is SiO
2.Glass ceramics dieelctric sheet 1 adopts melting-rapid cooling-crystallization heat treatment process preparation, is first mixed according to certain ratio by raw material, at 1350 DEG C ~ 1400 DEG C melting 2-4 hour, pours into fast in the metal die of preheating, form glass medium; Carry out crystallization heat process at 900 DEG C ~ 1000 DEG C subsequently, separate out ceramic phase, prepare glass ceramics dieelctric sheet; Dieelctric sheet is polished, polishing, obtain disk-shaped glass ceramic dielectric sheet 1.Figure 2 shows that the temperature characteristic of capacitance schematic diagram of glass ceramics medium of the present utility model, reflect the basic dielectric property of glass ceramics, in-20 DEG C ~ 85 DEG C temperature ranges capacitance variation rate be less than ± 4%.
Wherein, silver electrode 2 is glass ceramics dieelctric sheet upper and lower surface silver coating slurry, and in the fine and close silver electrode that the adhesion of 600 DEG C of sintering formation in 40 minutes is strong, silver electrode 2 edge keeps smooth.
Wherein, metal lead wire 3 is made of copper, metal lead wire 3 is utilized to be welded to connect divided glass ceramic dielectric sheet 1, dieelctric sheet upper surface electrode is linked together by metal lead wire 3, be welded to the upper terminal of electrode terminal 4, dieelctric sheet lower surface electrode is linked together by metal lead wire 3, is welded to the lower terminal of electrode terminal 4, forms symmetrical parallel-connection structure.The coupling capacitor of the 10kV electric pressure adopting this parallel-connection structure to prepare, ac voltage withstanding does not puncture through 50kV pressurize 1min, and 75kV lightning impulse ± 15 time edge flashing do not occur or puncture.Table 1 be the coupling capacitor of the different capabilities of the 10kV grade office under different on-load voltage high-volume.
Table 1
Wherein, adopt epoxy resin enclosed layer 5 to carry out solid encapsulation to whole parallel-connection structure, realize high dielectric strength.
The solid-state coupling capacitor of high-voltage large-capacity based on glass ceramics medium adopts glass ceramics as condenser dielectric, coupling capacitor Large Copacity is achieved by parallel-connection structure, simultaneously, reach non-oil ultra high vacuum system, low office put, the target of high reliability and miniaturization, can be applied in intelligent grid signal coupling, high-voltage testing equipment.
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 claim.
Claims (1)
1. the solid-state coupling capacitor of the high-voltage large-capacity based on glass ceramics medium, it is characterized in that, this coupling capacitor comprises glass ceramics dieelctric sheet (1), silver electrode (2), metal lead wire (3), electrode terminal (4), epoxy resin enclosed layer (5), metal insert (6); Wherein, glass ceramics dieelctric sheet (1) is in the form of annular discs, and silver electrode (2) fires the upper and lower surface in glass ceramics dieelctric sheet (1); Divided glass ceramic dielectric sheet (1) is welded to connect by metal lead wire (3), glass ceramics dieelctric sheet (1) upper surface electrode is linked together by metal lead wire (3) and is welded to the upper terminal of electrode terminal (4), glass ceramics dieelctric sheet (1) lower surface electrode is linked together by metal lead wire (3) and is welded to the lower terminal of electrode terminal (4), forms symmetrical parallel-connection structure; Epoxy resin enclosed layer (5) is adopted to carry out solid encapsulation to whole parallel-connection structure; Metal insert (6) is installed on the upper surface of glass ceramics dieelctric sheet (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420869974.9U CN204497063U (en) | 2014-12-31 | 2014-12-31 | The solid-state coupling capacitor of a kind of high-voltage large-capacity based on glass ceramics medium |
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|---|---|---|---|
| CN201420869974.9U CN204497063U (en) | 2014-12-31 | 2014-12-31 | The solid-state coupling capacitor of a kind of high-voltage large-capacity based on glass ceramics medium |
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| CN204497063U true CN204497063U (en) | 2015-07-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107610932A (en) * | 2017-09-04 | 2018-01-19 | 铜陵百墩实业有限公司 | A kind of capacitor based on glass ceramics medium |
-
2014
- 2014-12-31 CN CN201420869974.9U patent/CN204497063U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107610932A (en) * | 2017-09-04 | 2018-01-19 | 铜陵百墩实业有限公司 | A kind of capacitor based on glass ceramics medium |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190620 Address after: 101407 No. 11 Xingke East Street, Yanqi Economic Development Zone, Huairou District, Beijing Patentee after: Research Institute of engineering and Technology 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 |