CN109003813B - Vacuum capacitor - Google Patents
Vacuum capacitor Download PDFInfo
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- CN109003813B CN109003813B CN201810754071.9A CN201810754071A CN109003813B CN 109003813 B CN109003813 B CN 109003813B CN 201810754071 A CN201810754071 A CN 201810754071A CN 109003813 B CN109003813 B CN 109003813B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/005—Electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/224—Housing; Encapsulation
Abstract
The invention discloses a vacuum capacitor, which comprises an insulating shell, a high-voltage electrode group, a low-voltage electrode group, at least one shielding electrode group and at least one insulating sealing ring, wherein the insulating shell is arranged on the insulating shell; the shielding electrode group is connected with the high-voltage electrode group and/or the low-voltage electrode group; the shielding electrode group is connected with the insulating shell; the shielding electrode group is used for shielding the interference of an external electromagnetic field to the capacitor; one side of the insulating sealing ring is connected with the shielding electrode group, and the other side of the insulating sealing ring is connected with the high-voltage electrode group and/or the low-voltage electrode group. By adopting the invention, the polarization loss of the electrode caused by the action of the surrounding strong magnetic field can be avoided, and the influence of the electromagnetic field around the capacitor on the capacitor is effectively prevented; and the point discharge can be avoided, and the electric field intensity between the electrodes is reduced, so that the loss of the capacitor is greatly reduced.
Description
Technical Field
The invention relates to a capacitor, in particular to a fixed vacuum capacitor.
Background
A vacuum capacitor is a capacitor using vacuum as a medium. The electrode group of the capacitor is characterized in that a group of high-conductivity oxygen-free copper electrode rings are coaxially sealed in a vacuum container, the performance is stable and reliable, and phenomena such as arcing, corona and the like are not easy to generate. Vacuum capacitors can be divided into fixed capacitors and adjustable capacitors. As shown in fig. 3, the internal structure of a conventional fixed vacuum capacitor is schematically illustrated, and the capacitor includes an insulating case 1, a high voltage electrode group, and a low voltage electrode group. The high-voltage electrode disc 201 and the low-voltage electrode disc 301 are respectively connected with two ends of the insulating shell 1 to form a sealed cavity; the high-voltage electrode ring 202 fixedly connected with the high-voltage electrode disk 201 and the low-voltage electrode ring 302 fixedly connected with the low-voltage electrode disk 301 are coaxially arranged in the sealing cavity. The high voltage terminal and the low voltage terminal are led out from the high voltage electrode pad 201 and the low voltage electrode pad 301, respectively. The insulating shell is generally made of high-purity Al2O3And the prepared product has the advantage of low loss. The internal vacuum degree of the ceramic fixed vacuum capacitor is higher than 1 multiplied by 10-4Pa, and dielectric loss valuetg δ is typically 10 × 10-4。
With the wide application of the ceramic vacuum capacitor as a standard capacitor in a high-precision dielectric loss testing instrument, the dielectric loss value tg delta is 10 multiplied by 10-4The vacuum capacitor of (a) has not been able to satisfy the user demand. Therefore, a capacitor with smaller dielectric loss needs to be designed.
Disclosure of Invention
In order to solve the above technical problem, the present invention provides a vacuum capacitor, which includes an insulating housing, a high voltage electrode group, a low voltage electrode group, at least one shielding electrode group, and at least one insulating sealing ring;
the shielding electrode group is connected with the high-voltage electrode group and/or the low-voltage electrode group; the shielding electrode group is connected with the insulating shell; the shielding electrode group is used for shielding the interference of an external electromagnetic field to the capacitor;
one side of the insulating sealing ring is connected with the shielding electrode group, and the other side of the insulating sealing ring is connected with the high-voltage electrode group and/or the low-voltage electrode group.
Further, the high voltage electrode set comprises at least one high voltage electrode ring, the low voltage electrode set comprises at least one low voltage electrode ring, and the shielding electrode set comprises at least one shielding electrode ring;
the end shape of the high voltage electrode ring, the end shape of the low voltage electrode ring and the end shape of the shielding electrode ring comprise a sphere, a hemisphere, an ellipsoid or any other smooth shape avoiding sharp points, so as to avoid point discharge.
Furthermore, the high-voltage electrode group also comprises a high-voltage electrode disk, and the high-voltage electrode ring is fixedly connected with the high-voltage electrode disk;
the low-voltage electrode group also comprises a low-voltage electrode disk, and the low-voltage electrode ring is fixedly connected with the low-voltage electrode disk;
the shielding electrode group also comprises a shielding electrode disk, and the shielding electrode ring is fixedly connected with the shielding electrode disk.
Further, the shielding electrode disk is connected with the insulating shell.
Furthermore, the wall thickness of the high-voltage electrode ring, the wall thickness of the low-voltage electrode ring and the wall thickness of the shielding electrode ring are not less than 2mm, so that the curvature radius of the opening part of the electrode ring is increased.
Alternatively, there may be one or two sets of shield electrode sets, and correspondingly, there may be one or two sets of insulating sealing rings.
Preferably, the shielding electrode group has one group, and the shielding electrode disk of the shielding electrode group is connected with one end of the insulating shell; the shielding electrode group is connected with the high-voltage electrode group or the low-voltage electrode group.
Correspondingly, one of the insulating sealing rings is arranged; the insulating seal ring is disposed between the shield electrode group and the high voltage electrode group or the low voltage electrode group.
Furthermore, the two groups of shielding electrode groups are respectively a first shielding electrode group and a second shielding electrode group;
the first shielding electrode group and the second shielding electrode group are respectively connected with two ends of the insulating shell to form vacuum cavities; the high-voltage electrode group and the low-voltage electrode group are arranged in the vacuum cavity; the first shielding electrode group is connected with the high-voltage electrode group, and the second shielding electrode group is connected with the low-voltage electrode group.
Correspondingly, the number of the insulating sealing rings is two, namely a first insulating sealing ring and a second insulating sealing ring;
the first insulating sealing ring is arranged between the first shielding electrode disk of the first shielding electrode group and the high-voltage electrode disk and used for insulating the first shielding electrode disk of the first shielding electrode group and the high-voltage electrode disk;
the second insulating sealing ring is arranged between the second shielding electrode disk of the second shielding electrode group and the low-voltage electrode disk and used for insulating the second shielding electrode disk of the second shielding electrode group and the low-voltage electrode disk.
Furthermore, the first shielding electrode disk and the second shielding electrode disk are respectively provided with a first through hole and a second through hole which are respectively used for leading out a high-voltage terminal and a low-voltage terminal of the capacitor.
The high-voltage electrode disk and the low-voltage electrode disk of the existing vacuum capacitor are directly exposed outside and are easily interfered by an external electromagnetic field, and are easily influenced by dust and moisture in a use environment, particularly in a humid environment, so that an external creepage phenomenon is easily generated. In addition, the tip at the end of the electrode ring is prone to cause a tip discharge effect, resulting in losses. The embodiment of the invention has the following beneficial effects:
(1) according to the vacuum capacitor, the shielding electrode group is additionally arranged, the high-voltage electrode group or the low-voltage electrode group or the high-voltage electrode group and the low-voltage electrode group are placed in the capacitor, so that the polarization loss of the electrodes due to the action of a strong magnetic field around the electrodes is avoided, and the influence of the electromagnetic field around the capacitor on the capacitor is effectively prevented.
(2) The shield electrode rings in the set of shield electrodes also balance the internal electric field, preventing internal imbalance.
(3) The wall thickness of the electrode ring is increased to more than 2mm, the curvature radius of the opening part of the electrode ring is increased, the opening part of the electrode ring is processed into a spherical shape, point discharge is avoided, the electric field intensity between electrodes is reduced, and therefore leakage loss between the electrodes is reduced; so that the loss of the whole vacuum capacitor can be less than 3 x 10-5。
(4) The invention has strong expandability of the structural design form and can meet the design requirements of reducing the loss of capacitors with different specifications.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions and advantages of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of an internal structure of a vacuum capacitor according to an embodiment;
FIG. 2 is a schematic view showing the internal structure of a vacuum capacitor according to a third embodiment;
fig. 3 is a schematic view of the internal structure of a vacuum capacitor in the related art.
Wherein, the corresponding reference numbers in the figures are: 1-an insulating housing; 2-a high voltage electrode group; 201-high voltage electrode disk; 202-high voltage electrode ring; 2021-a first high voltage electrode ring; 2022-a second high voltage electrode ring; 3-a low voltage electrode group; 301-low voltage electrode disk; 302-low voltage electrode ring; 4-a set of shield electrodes; 401-shield electrode disk; 4011-a via; 402-a shield electrode ring; 41-a first set of shielding electrodes; 4101-a first shielding electrode disk; 41011-first via; 4102-a first shield electrode ring; 42-a second set of shield electrodes; 4201-a second shielding electrode disk; 42011-a second via; 4202-a second shield electrode ring; 5-insulating sealing ring; 501-first insulating seal ring; 502-a second insulating seal ring; 6-vacuum cavity; 7-sphere.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In addition, unless expressly stated or limited otherwise, the terms "connected" and "coupled" and the like are intended to be inclusive and mean, for example, that they may be fixedly coupled, detachably coupled, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows:
as shown in fig. 1, the present embodiment provides a vacuum capacitor including an insulating case 1, a high-voltage electrode group 2, a low-voltage electrode group 3, a shielding electrode group 4, and an insulating seal ring 5;
the shielding electrode group 4 is connected with the low-voltage electrode group 3; the shielding electrode group 4 is connected with the insulating shell 1; the shielding electrode group 4 is used for shielding the interference of an external electromagnetic field to the capacitor;
one side of the insulating sealing ring 5 is connected with the shielding electrode group 4, and the other side is connected with the low-voltage electrode group 3.
Further, the high voltage electrode group 2 comprises a high voltage electrode disk 201, a first high voltage electrode ring 2021 and a second high voltage electrode ring 2022, and the first high voltage electrode ring 2021 and the second high voltage electrode ring 2022 are coaxially fixed on the high voltage electrode disk 201.
Further, the low voltage electrode group 3 comprises a low voltage electrode disk 301 and a low voltage electrode ring 302, and the low voltage electrode ring 302 is fixedly connected with the low voltage electrode disk 301.
Further, the shielding electrode group 4 includes a shielding electrode disk 401 and a shielding electrode ring 402, and the shielding electrode ring 402 is fixedly connected to the shielding electrode disk 401.
Further, the high voltage electrode disk 201 and the shielding electrode ring 402 are respectively connected with two ends of the insulating housing 1 to form a vacuum chamber 6.
Further, the shielding electrode ring 402 and the first high voltage electrode ring 2021 are relatively distributed in the vacuum chamber 6, and the shielding electrode ring 402 is used for balancing an internal electromagnetic field.
Further, the low-voltage electrode disc 301 is connected with the shielding electrode disc 401 through the insulating sealing ring 5, the insulating sealing ring 5 is used for insulating the low-voltage electrode disc 301 from the shielding electrode disc 401, and can also seal the vacuum cavity 6.
Further, the first high voltage electrode ring 2021, the second high voltage electrode ring 2022, the low voltage electrode ring 302 and the shielding electrode ring 402 are coaxially distributed in the vacuum chamber 6.
Further, a through hole 4011 is formed in the shielding electrode disk 401, and the through hole 4011 is used for leading out a low-voltage terminal; and the high-voltage terminal is directly led out from the high-voltage electrode disc 201 at the end part.
Further, the material of the insulating housing 1 and the material of the insulating seal ring 5 may be ceramic or other insulating materials such as glass, and are preferably ceramic.
Further, the end shape of the first high voltage electrode ring 2021, the end shape of the second high voltage electrode ring 2022, the end shape of the low voltage electrode ring 302 and the end shape of the shielding electrode ring 402 comprise a sphere, a hemisphere, an ellipsoid or any other rounded shape avoiding sharp points to avoid point discharge. And its preferred shape is a sphere 7.
Further, the wall thickness of the high voltage electrode ring 202, the wall thickness of the low voltage electrode ring 302 and the wall thickness of the shield electrode ring 402 are not less than 2mm to increase the radius of curvature of the electrode ring opening.
The shielding electrode group 4 in the embodiment is only one group, and is arranged at the end part of the insulating shell 1, and the low-voltage electrode group 3 is arranged in the insulating shell 1, so that the polarization loss of the electrodes caused by the action of a strong magnetic field around the electrodes is avoided, and the influence of the electromagnetic field around the capacitor on the capacitor is effectively prevented. Meanwhile, the wall thickness of the electrode ring is increased to be more than 2mm, the curvature radius of the opening part of the electrode ring is increased, the opening part of the electrode ring is processed into a spherical shape, the electric field intensity between electrodes is reduced, and the leakage loss between the electrodes is reduced. The dielectric loss of the capacitor is reduced as a whole.
Example two:
in conjunction with fig. 1 and the first embodiment, the present embodiment provides a vacuum capacitor. In the first embodiment, the shielding electrode group 4 is disposed on one side of the low voltage electrode group 3, and moves the low voltage electrode group 3 into the insulating housing 1. The shielding electrode group 4 can also be arranged at one side of the high-voltage electrode group 2, and the high-voltage electrode group 2 is moved into the insulating shell 1.
Specifically, the vacuum capacitor comprises an insulating shell 1, a high-voltage electrode group 2, a low-voltage electrode group 3, a shielding electrode group 4 and an insulating sealing ring 5;
the shielding electrode group 4 is connected with the high-voltage electrode group 2; the shielding electrode group 4 is connected with the insulating shell 1; the shielding electrode group 4 is used for shielding the interference of an external electromagnetic field to the capacitor;
one side of the insulating sealing ring 5 is connected with the shielding electrode group 4, and the other side is connected with the high-voltage electrode group 2.
Further, the high voltage electrode group 2 comprises a high voltage electrode disk 201 and a high voltage electrode ring 202 fixed on the high voltage electrode disk 201; the low-voltage electrode group 3 comprises a low-voltage electrode disk 301 and a low-voltage electrode ring 302 fixed on the low-voltage electrode disk 301; the set 4 of shielding electrodes comprises a shielding electrode disk 401 and a shielding electrode ring 402 fixed to the shielding electrode disk 401.
Further, the low voltage electrode disk 301 and the shielding electrode ring 402 are respectively connected to two ends of the insulating housing 1 to form a vacuum chamber 6.
Further, the shielding electrode ring 402 and the low voltage electrode ring 302 are relatively distributed in the vacuum chamber 6, and the shielding electrode ring 402 is used for balancing an internal electromagnetic field.
Further, the high voltage electrode disk 201 is connected with the shielding electrode ring 402 through the insulating sealing ring 5, and the insulating sealing ring 5 is used for insulating the high voltage electrode disk 201 from the shielding electrode disk 401 and sealing the vacuum cavity 6.
Further, the high voltage electrode ring 202, the low voltage electrode ring 302, and the shielding electrode ring 402 are coaxially distributed in the vacuum chamber 6.
Further, a through hole 4011 is formed in the shielding electrode disk 401, and the through hole 4011 is used for leading out a high-voltage terminal; and the low-voltage terminal is directly led out from the low-voltage electrode disc 301 at the end part.
Further, the material of the insulating housing 1 and the material of the insulating seal ring 5 may be ceramic or other insulating materials such as glass, and are preferably ceramic.
Further, the end shape of the high voltage electrode ring 202, the end shape of the low voltage electrode ring 302 and the end shape of the shielding electrode ring 402 comprise spheres, hemispheres, ellipsoids or any other rounded shape avoiding sharp points to avoid point discharge. And its preferred shape is a sphere 7.
Further, the wall thickness of the high voltage electrode ring 202, the wall thickness of the low voltage electrode ring 302 and the wall thickness of the shield electrode ring 402 are not less than 2mm to increase the radius of curvature of the electrode ring opening.
The shielding electrode group 4 in the present embodiment is only one group, and is provided at the end of the insulating case 1, and the high voltage electrode group 2 is provided inside the insulating case 1; the vacuum capacitor provided by the embodiment has a similar internal structure as the vacuum capacitor provided by the first embodiment, and the beneficial effects are also the same, so that the dielectric loss of the capacitor can be reduced as a whole.
Example three:
as shown in fig. 2, the present embodiment provides a vacuum capacitor including an insulating case 1, a high-voltage electrode group 2, a low-voltage electrode group 3, a first shielding electrode group 41, a second shielding electrode group 42, a first insulating seal ring 501, and a second insulating seal ring 502;
the first shielding electrode group 41 and the second shielding electrode group 42 are respectively connected with two ends of the insulating shell 1 to form a vacuum cavity 6; the high voltage electrode group 2 and the low voltage electrode group 3 are arranged in the vacuum cavity 6; the first shielding electrode group 41 is connected with the high voltage electrode group 2, and the second shielding electrode group 42 is connected with the low voltage electrode group 3;
the first insulating seal ring 501 is disposed between the first shielding electrode disk 4101 of the first shielding electrode group 41 and the high voltage electrode disk 201, and is used for insulating the first shielding electrode disk 4101 and the high voltage electrode disk 201;
the second insulating sealing ring 502 is disposed between the second shielding electrode disk 4201 of the second shielding electrode group 42 and the low-voltage electrode disk 301, and is used for insulating the second shielding electrode disk 4201 and the low-voltage electrode disk 301.
Further, the high voltage electrode group 2 comprises a high voltage electrode disk 201 and a high voltage electrode ring 202, and the high voltage electrode ring 202 is fixed on the high voltage electrode disk 201.
Further, the low voltage electrode group 3 comprises a low voltage electrode disk 301 and a low voltage electrode ring 302, and the low voltage electrode ring 302 is fixedly connected with the low voltage electrode disk 301.
Further, the first shielding electrode group 41 further includes a first shielding electrode ring 4102, and the first shielding electrode ring 4102 is fixedly connected to the first shielding electrode disk 4101.
Further, the second shielding electrode group 42 further includes a second shielding electrode ring 4202, and the second shielding electrode ring 4202 is fixedly connected to the second shielding electrode disk 4201.
Further, the first shielding electrode disk 4101 and the second shielding electrode disk 4201 are connected to both ends of the insulating housing 1, respectively, to form a vacuum chamber 6.
Further, the first shielding electrode ring 4102 and the second shielding electrode ring 4202 are oppositely disposed in the vacuum chamber 6 for balancing an internal electromagnetic field.
Further, the high voltage electrode pad 201 is connected to the first shielding electrode pad 4101 through the first insulating seal ring 501; the low-voltage electrode disk 301 is connected with the second shielding electrode disk 4201 through the second insulating sealing ring 502; the first insulating seal ring 501 is used for insulating the high-voltage electrode disk 201 from the first shielding electrode disk 4101, and the second insulating seal ring 502 is used for insulating the low-voltage electrode disk 301 from the second shielding electrode disk 4201; the first insulating seal ring 501 and the second insulating seal ring 502 are also capable of sealing the vacuum chamber 6.
Further, the high voltage electrode ring 202, the low voltage electrode ring 302, the first shielding electrode ring 4102 and the second shielding electrode ring 4202 are coaxially distributed within the vacuum chamber 6.
Further, a first through hole 41011 is formed in the first shielding electrode disk 4101, and the first through hole 41011 is used for leading out a high voltage terminal; a second through hole 42011 is formed on the second shielding electrode disk 4201, and the second through hole 42011 is used for leading out a high voltage terminal.
Further, the material of the insulating housing 1, the first insulating seal ring 501, and the second insulating seal ring 502 may be ceramic or another insulating material such as glass, and are preferably ceramic.
Further, the end shape of the high voltage electrode ring 202, the end shape of the low voltage electrode ring 302, the end shape of the first shielding electrode ring 4102 and the end shape of the second shielding electrode ring 4202 comprise spheres, hemispheres, ellipsoids or any other rounded shape avoiding sharp discharge. And its preferred shape is a sphere 7.
Further, the wall thickness of the high voltage electrode ring 202, the wall thickness of the low voltage electrode ring 302, the wall thickness of the first shielding electrode ring 4102 and the wall thickness of the second shielding electrode ring 4202 are not less than 2mm to increase the radius of curvature of the electrode ring mouth.
Two sets of the shielding electrode groups 4 in this embodiment are respectively disposed at both ends of the insulating case 1, and the high voltage electrode group 2 and the low voltage electrode group 3 are disposed in the vacuum chamber 6. Compared with a vacuum capacitor with only one shielding electrode group 4, the loss of the strong surrounding magnetic field to the capacitor can be reduced, but the structural size of the vacuum capacitor is increased correspondingly. In addition, the wall thickness of the electrode ring is increased to be more than 2mm, the curvature radius of the opening part of the electrode ring is increased, the opening part of the electrode ring is processed into a spherical shape, the electric field intensity between electrodes is reduced, and the leakage loss between the electrodes is reduced.
In addition, the number of high voltage electrode rings 202 and low voltage electrode rings 302 can be increased or decreased as required by the particular capacitor specifications. When there are many high voltage electrode rings 202 and low voltage electrode rings 302, there may be one and only one shield electrode ring 402, the specific number depending on the configuration.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A vacuum capacitor, characterized in that it comprises an insulating housing (1), a set of high voltage electrodes (2), a set of low voltage electrodes (3), at least one set of shield electrodes (4) and at least one insulating sealing ring (5);
the shielding electrode group (4) is connected with the high-voltage electrode group (2) and/or the low-voltage electrode group (3); the shielding electrode group (4) is connected with the insulating shell (1); the shielding electrode group (4) is used for shielding the interference of an external electromagnetic field to the capacitor;
one side of the insulating sealing ring (5) is connected with the shielding electrode group (4), and the other side of the insulating sealing ring is connected with the high-voltage electrode group (2) and/or the low-voltage electrode group (3).
2. A vacuum capacitor as claimed in claim 1, characterized in that the high-voltage electrode set (2) comprises at least one high-voltage electrode ring (202), the low-voltage electrode set (3) comprises at least one low-voltage electrode ring (302), and the shielding electrode set (4) comprises at least one shielding electrode ring (402);
the end shape of the high voltage electrode ring (202), the end shape of the low voltage electrode ring (302), and the end shape of the shield electrode ring (402) comprise a sphere, a hemisphere, and an ellipsoid.
3. A vacuum capacitor as claimed in claim 2, characterized in that the high voltage electrode group (2) further comprises a high voltage electrode disk (201), the high voltage electrode ring (202) is fixedly connected with the high voltage electrode disk (201);
the low-voltage electrode group (3) further comprises a low-voltage electrode disk (301), and the low-voltage electrode ring (302) is fixedly connected with the low-voltage electrode disk (301);
the shielding electrode group (4) further comprises a shielding electrode disk (401), and the shielding electrode ring (402) is fixedly connected with the shielding electrode disk (401).
4. A vacuum capacitor as claimed in claim 3, characterized in that the shielding electrode disk (401) is connected to the insulating housing (1).
5. A vacuum capacitor as claimed in claim 2, characterized in that the wall thickness of the high voltage electrode ring (202), the wall thickness of the low voltage electrode ring (302) and the wall thickness of the shielding electrode ring (402) are not less than 2 mm.
6. A vacuum capacitor as claimed in claim 4, characterized in that the set of shielding electrodes (4) is one, the shielding electrode pads (401) of the set of shielding electrodes (4) being connected to one end of the insulating housing (1); the shielding electrode group (4) is connected with the high-voltage electrode group (2) or the low-voltage electrode group (3) through the insulating sealing ring (5).
7. A vacuum capacitor according to claim 6, characterized in that there is one of said insulating sealing rings (5); the insulating sealing ring (5) is arranged between the shielding electrode group (4) and the high-voltage electrode group (2) or the low-voltage electrode group (3).
8. A vacuum capacitor as claimed in claim 4, characterized in that there are two sets of shield electrode sets (4), a first set (41) and a second set (42);
the first shielding electrode group (41) and the second shielding electrode group (42) are respectively connected with two ends of the insulating shell (1) to form a vacuum cavity (6); the high-voltage electrode group (2) and the low-voltage electrode group (3) are arranged in the vacuum cavity (6);
the first shielding electrode group (41) is connected with the high-voltage electrode group (2) through the insulating sealing ring, and the second shielding electrode group (42) is connected with the low-voltage electrode group (3) through the insulating sealing ring.
9. A vacuum capacitor according to claim 8, characterized in that there are two insulating seal rings (5), a first insulating seal ring (501) and a second insulating seal ring (502);
the first insulating sealing ring (501) is arranged between the first shielding electrode disk (4101) of the first shielding electrode group (41) and the high-voltage electrode disk (201) and is used for insulating the first shielding electrode disk (4101) and the high-voltage electrode disk (201);
the second insulating seal ring (502) is disposed between the second shield electrode disk (4201) of the second shield electrode group (42) and the low-voltage electrode disk (301) for insulating the second shield electrode disk (4201) and the low-voltage electrode disk (301).
10. A vacuum capacitor as claimed in claim 9, characterized in that the first shielding electrode pad (4101) and the second shielding electrode pad (4201) are provided with a first through hole (41011) and a second through hole (42011), respectively, for leading out a high-voltage terminal and a low-voltage terminal of the capacitor, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810754071.9A CN109003813B (en) | 2018-07-10 | 2018-07-10 | Vacuum capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810754071.9A CN109003813B (en) | 2018-07-10 | 2018-07-10 | Vacuum capacitor |
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| Publication Number | Publication Date |
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| CN109003813A CN109003813A (en) | 2018-12-14 |
| CN109003813B true CN109003813B (en) | 2020-04-28 |
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| CN201810754071.9A Active CN109003813B (en) | 2018-07-10 | 2018-07-10 | Vacuum capacitor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2594951Y (en) * | 2002-12-21 | 2003-12-24 | 国营第八九七厂 | Water-cooled ceramic vacuum capacitor |
| JP4285231B2 (en) * | 2003-12-22 | 2009-06-24 | 株式会社明電舎 | Vacuum variable capacitor |
| JP5217382B2 (en) * | 2007-11-20 | 2013-06-19 | 株式会社明電舎 | Vacuum capacitor |
| CN201110866Y (en) * | 2007-12-17 | 2008-09-03 | 国网武汉高压研究院 | Extra-high voltage reference capacitor |
| JP6227408B2 (en) * | 2010-06-28 | 2017-11-08 | コメット アクチェンゲゼルシャフト | Vacuum variable capacitor |
| CN202839308U (en) * | 2012-08-28 | 2013-03-27 | 西安布伦帕电力无功补偿技术有限公司 | High-voltage standard capacitor |
| EP3005385B1 (en) * | 2013-05-30 | 2019-10-30 | Comet AG | Vacuum variable capacitor |
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