CN210896999U - Ultrahigh voltage metallized film capacitor - Google Patents
Ultrahigh voltage metallized film capacitor Download PDFInfo
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- CN210896999U CN210896999U CN201921616963.9U CN201921616963U CN210896999U CN 210896999 U CN210896999 U CN 210896999U CN 201921616963 U CN201921616963 U CN 201921616963U CN 210896999 U CN210896999 U CN 210896999U
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Abstract
The utility model discloses an ultrahigh-voltage metallized composite film capacitor, which comprises a core rod, a capacitor module and a shell, wherein a plurality of capacitor modules are uniformly distributed around the core rod, the core rod and the capacitor module are both in a cylindrical shape and are coaxially arranged with each other, the core rod and the capacitor module are both arranged in the shell, and injection molding materials are filled in gaps among the core rod, the capacitor module and the shell; the capacitor module comprises a capacitor core, wherein a metallized composite film is wound outside the capacitor core, the metallized composite film is wound around the capacitor core layer by layer, and a positive electrode and a negative electrode are respectively led out from two axial ends of the capacitor module; the positive ends of the adjacent capacitor modules are connected in series to lead out a positive wire, and the negative ends of the adjacent capacitor modules are connected in series to lead out a negative wire. The utility model discloses temperature stability is good, has good self-healing characteristic, and the product is longe-lived, and the condenser is inside not producing ionic current with the high-voltage pulse occasion, and insulating nature is good.
Description
Technical Field
The utility model relates to a superhigh pressure metallized film condenser belongs to condenser technical field.
Background
At present, capacitors on the market are various, the quality of the capacitors is uneven, the existing thin-film capacitors are prone to capacity loss and capacity reduction after self-healing under the condition of long-term working, the capacity of the capacitors is unstable and not suitable for an oscillating circuit with high requirements for capacity stability, and meanwhile, the capacitors are poor in large-current resistance and prone to partial discharge. In an electric power system, the capacity of a zero sequence sensor and a voltage transformer to a capacitor is very high to change along with the temperature, and almost no change is required at-55-105 ℃, which is a problem that the capacitor circulating in the current market cannot solve.
Disclosure of Invention
In order to solve the above problem, the utility model provides an ultrahigh voltage metallized film capacitor, its concrete technical scheme as follows:
an ultrahigh-voltage metallized composite film capacitor comprises a core rod, a capacitor module and a shell, wherein the circumferences of the capacitor modules are uniformly distributed around the core rod, the core rod and the capacitor module are both in a cylindrical shape and are coaxially arranged with each other, the core rod and the capacitor module are both arranged in the shell, and injection molding materials are filled in gaps among the core rod, the capacitor module and the shell;
the capacitor module comprises a capacitor core, wherein a metallized composite film is wound outside the capacitor core, the metallized composite film is wound around the capacitor core layer by layer, and a positive electrode and a negative electrode are respectively led out from two axial ends of the capacitor module;
the positive ends of the adjacent capacitor modules are connected in series to lead out a positive wire, and the negative ends of the adjacent capacitor modules are connected in series to lead out a negative wire.
Furthermore, the metallized composite film is formed by a polypropylene metallized film and a polyester metallized film,
the polypropylene metallized film comprises a polypropylene film and pure aluminum films evaporated on one side surface of the polypropylene film, wherein one side of the pure aluminum films covers the edge of the polypropylene film, the other side of the pure aluminum films is provided with a margin away from the corresponding edge of the polypropylene film,
the polyester metallized film comprises a polyester film and pure aluminum films evaporated on one side surface of the polyester film, wherein one side of the pure aluminum films covers the edge of the polyester film, the other side of the pure aluminum films is provided with a margin away from the corresponding edge of the polyester film,
the surface of one side of the polyester metallized film, which is evaporated with the pure aluminum film, is compounded to the surface of one side of the polypropylene metallized film, which is not provided with the pure aluminum film, and the left edge of the polypropylene metallized film and the left edge of the polyester metallized film are respectively positioned at the left side and the right side, so that the left edge and the staggered edge are matched.
And one surfaces of the polypropylene metallized film and the polyester metallized film, which are evaporated with pure aluminum films, face the capacitor core.
Furthermore, one side of the polypropylene metallized film and one side of the polyester metallized film which are evaporated to the edge are also evaporated with a thickened aluminum-zinc alloy layer, the aluminum-zinc alloy layer covers the surface of the pure aluminum layer, after the metallized composite film is rolled around the capacitor core, the aluminum-zinc alloy layers are respectively positioned at the two axial ends of the capacitor module, and at one end of the capacitor module, the electrode wire is connected in series with the aluminum-zinc alloy layers passing through all the layers and extends out to form the electrode wire.
Furthermore, the core rod, the capacitor module and the shell are molded by pouring epoxy resin.
Has the advantages that:
1. the capacitor adopting the metallized composite film has small capacity change under the condition of temperature change, and has good self-healing characteristic and temperature stability;
2. the utility model adopts a multi-string membrane structure, the voltage can reach 50KVAC under the condition of power frequency 50Hz, and the design of the product can ensure that no ion current is generated in the capacitor under the application occasions of alternating current and high voltage pulse;
3. the utility model discloses a phenolic aldehyde integral casting technology, one shot forming avoids the partial discharge phenomenon, improves insulating characteristic.
Drawings
FIG. 1 is a simple view of the overall structure of the present invention,
figure 2 is a top view of the present invention from figure 1,
figure 3 is a schematic diagram of a single capacitor module of the present invention,
FIG. 4 is a cross-sectional view of a metallized composite film of the present invention,
figure 5 is an exploded view of figure 4,
wherein: 1-shell, 2-single capacitor, 3-core rod, 4-capacitor core, 5-metallized composite film, 6-metal layer, 7-polypropylene film and 8-polyester film.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 and 3, the ultrahigh voltage metallized composite film capacitor comprises a capacitor 2, a core rod 3 and a shell 1, and with reference to fig. 2, a metallized composite film 5 is wound outside the capacitor core 4 to form a single capacitor 2, three or more capacitor cores 4 are connected in series, the capacitor cores 4 are uniformly distributed between the shell 1 and the core rod 3 in a circumferential manner, the capacitor cores 4 are fixed on the base of the shell 1, the welded capacitor cores are fixed by using an integral mold, the internal air and water are eliminated by adopting a phenolic aldehyde integral casting process technology through a deoxidation heating process, then epoxy resin is cast in a vacuum state, and then the curing and demolding are carried out at 105 ℃.
As shown in fig. 3, the single capacitor 2 is formed by winding a metallized composite film 5 on a capacitor core 4 a plurality of times, and the single capacitor 2 has a cylindrical shape. The surface of the polypropylene film and the surface of the polyester film are manufactured by pure aluminum evaporation and edge thickening evaporation zinc-aluminum alloy to form a polypropylene metallized film and a polyester metallized film, the polypropylene metallized film and the polyester metallized film are laminated and compounded, namely, one surface of the polyester metallized film with a metal layer is compounded to one surface of the polypropylene metallized film without the metal layer 6, and the metallized composite film 5 is formed by pairing of edge retaining and edge staggering, as shown in figure 4. When the metallized composite film 5 is wound, the polypropylene metallized film is positioned at the inner side, and the electrode layers of the polypropylene metallized film and the polyester metallized film face the capacitor core 4 side.
The utility model discloses utilize the temperature characteristic of polypropylene and polyester, adopt one deck polypropylene and one deck polyester complex film, and carry out the pairing of remaining limit and wrong limit, utilize the temperature characteristic complementation of polypropylene film and polyester film material, it is little that the capacity of condenser under the condition of-55 ~ 105 ℃ changes to have solved, measure the rate of change under the power frequency condition and be nearly zero, solved the temperature drift problem, temperature stability is good, the design of metallized electrode makes the product have the life characteristic often; the capacitor with the nominal voltage of 12KvAC requires 42KvAC to bear for one minute under the power frequency of 50Hz and 75Kv of lightning stroke voltage, the electrode layer adopts a multi-string structure, the zinc-aluminum alloy at the edge of the composite film is thickened, the contact area with a metal spraying surface is increased, the overcurrent capacity is improved, the core of a single capacitor is ensured to bear the power frequency alternating current voltage of 14Kv, and the core is ensured to bear the voltage resistance of 42-50Kv for 60 seconds under the power frequency alternating current and 75Kv of lightning stroke through the external series design of the cores; finally, the welded capacitor core is fixed by using an integral mold, internal air and moisture are eliminated by a deoxidation heating process, then epoxy resin is poured in a vacuum state, and curing and demolding are carried out at 105 ℃, so that the partial discharge phenomenon of the capacitor is avoided, and the insulation characteristic is improved.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The present invention is intended to cover by those skilled in the art various modifications and adaptations of the invention without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention is subject to the claims. Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention.
Claims (4)
1. An ultrahigh-pressure metallized composite film capacitor is characterized in that: the core rod type capacitor comprises a core rod (3), capacitor modules (2) and a shell (1), wherein the plurality of capacitor modules (2) are uniformly distributed around the core rod (3) in the circumferential direction, the core rod (3) and the capacitor modules (2) are cylindrical and are coaxially arranged with each other, the core rod (3) and the capacitor modules (2) are arranged in the shell (1), and injection molding materials are filled in gaps among the core rod (3), the capacitor modules (2) and the shell (1);
the capacitor module (2) comprises a capacitor core (4), a metallized composite film (5) is wound outside the capacitor core (4), the metallized composite film (5) is wound around the capacitor core (4) layer by layer, and a positive electrode and a negative electrode are respectively led out from two axial ends of the capacitor module;
the positive ends of the adjacent capacitor modules (2) are connected in series to lead out a positive wire, and the negative ends of the adjacent capacitor modules (2) are connected in series to lead out a negative wire.
2. The ultra-high voltage metallized composite film capacitor according to claim 1, wherein: the metallized composite film (5) is composed of a polypropylene metallized film (7) and a polyester metallized film (8),
the polypropylene metallized film (7) comprises a polypropylene film and pure aluminum films evaporated on one side surface of the polypropylene film, wherein one side of the pure aluminum films covers the edge of the polypropylene film, the other side of the pure aluminum films is provided with a margin away from the corresponding edge of the polypropylene film,
the polyester metallized film (8) comprises a polyester film and pure aluminum films evaporated on one side surface of the polyester film, wherein one side of the pure aluminum films covers the edge of the polyester film, the other side of the pure aluminum films is provided with a margin away from the corresponding edge of the polyester,
the surface of one side of the polyester metallized film, which is evaporated with the pure aluminum film, is compounded to the surface of one side of the polypropylene metallized film, which is not provided with the pure aluminum film, and the left edge of the polypropylene metallized film (7) and the left edge of the polyester metallized film (8) are respectively positioned at the left side and the right side to realize the pairing of the left edge and the staggered edge,
and one surfaces of the polypropylene metallized film and the polyester metallized film, which are evaporated with pure aluminum films, face the capacitor core (4).
3. The ultra-high voltage metallized composite film capacitor according to claim 2, wherein: the aluminum-zinc composite capacitor is characterized in that a thickened aluminum-zinc alloy layer is further evaporated on one side of the edge of the polypropylene metallized film (7) and the polyester metallized film (8), the aluminum-zinc alloy layer covers the surface of the pure aluminum layer, after the metallized composite film (5) is rolled around the capacitor core (4), the aluminum-zinc alloy layers are respectively located at two axial ends of the capacitor module (2), and the electrode wires are connected in series to pass through the aluminum-zinc alloy layers on all the layers and extend out from one end of the capacitor module (2) to form the electrode wires.
4. The ultra-high voltage metallized composite film capacitor according to claim 2, wherein: the core rod (3), the capacitor module (2) and the shell (1) are molded by pouring epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921616963.9U CN210896999U (en) | 2019-09-26 | 2019-09-26 | Ultrahigh voltage metallized film capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921616963.9U CN210896999U (en) | 2019-09-26 | 2019-09-26 | Ultrahigh voltage metallized film capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210896999U true CN210896999U (en) | 2020-06-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921616963.9U Active CN210896999U (en) | 2019-09-26 | 2019-09-26 | Ultrahigh voltage metallized film capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210896999U (en) |
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2019
- 2019-09-26 CN CN201921616963.9U patent/CN210896999U/en active Active
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Address after: 225600 Daizhuang Road, industrial concentration zone, Gaoyou town, Gaoyou City, Yangzhou City, Jiangsu Province Patentee after: Jiangsu high energy rongchuang Electric Co.,Ltd. Address before: 225600 Daizhuang Road, industrial concentration zone, Gaoyou town, Gaoyou City, Yangzhou City, Jiangsu Province Patentee before: Yangzhou Kaipu Technology Co.,Ltd. |
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