WO2018235391A1 - Capacitor - Google Patents

Capacitor Download PDF

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Publication number
WO2018235391A1
WO2018235391A1 PCT/JP2018/014913 JP2018014913W WO2018235391A1 WO 2018235391 A1 WO2018235391 A1 WO 2018235391A1 JP 2018014913 W JP2018014913 W JP 2018014913W WO 2018235391 A1 WO2018235391 A1 WO 2018235391A1
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Prior art keywords
movable
bellows
electrode
end plate
capacitor
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PCT/JP2018/014913
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French (fr)
Japanese (ja)
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道大 畠中
大造 高橋
利眞 深井
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株式会社明電舎
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Publication of WO2018235391A1 publication Critical patent/WO2018235391A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G5/00—Capacitors in which the capacitance is varied by mechanical means, e.g. by turning a shaft; Processes of their manufacture
    • H01G5/01—Details
    • H01G5/013—Dielectrics
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G5/00—Capacitors in which the capacitance is varied by mechanical means, e.g. by turning a shaft; Processes of their manufacture
    • H01G5/01—Details
    • H01G5/014—Housing; Encapsulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G5/00—Capacitors in which the capacitance is varied by mechanical means, e.g. by turning a shaft; Processes of their manufacture
    • H01G5/04—Capacitors in which the capacitance is varied by mechanical means, e.g. by turning a shaft; Processes of their manufacture using variation of effective area of electrode
    • H01G5/14—Capacitors in which the capacitance is varied by mechanical means, e.g. by turning a shaft; Processes of their manufacture using variation of effective area of electrode due to longitudinal movement of electrodes

Definitions

  • the present invention relates to a capacitor.
  • the invention relates to a cooling structure of a vacuum capacitor.
  • the vacuum capacitor 16 includes a pair of electrodes (fixed electrode 3 and movable electrode 4) incorporated in the vacuum vessel 2.
  • the vacuum vessel 2 is formed by closing the insulating cylindrical portion 5 formed of ceramics or the like with the fixed side end plate / fixed electrode attachment conductor 6 and the movable side end plate 7.
  • the movable electrode 4 is provided with one end of a movable lead 9.
  • An electrostatic capacity adjustment unit 12 is provided at the other end of the movable lead 9 so that the movable electrode 4 can be moved in the axial direction of the vacuum vessel 2 from the outside of the vacuum vessel 2.
  • a bellows 10 is provided on the outer periphery of the movable lead 9 and in the movable side end plate 7 so that the movable lead 9 can move in the axial direction of the vacuum vessel 2 while maintaining the vacuum of the vacuum vessel 2. It has become.
  • the vacuum capacitor 16 When the vacuum capacitor 16 is used, heat is generated at the underlying electrode to flow the current. If it is a fixed type vacuum capacitor, since the electrodes are joined, it can be coped with by cooling the flange (end plate).
  • variable capacitance type capacitor it is difficult to directly cool the movable electrode because the movable electrode is present at the back of the container via the bellows. Also, the current flowing through the movable electrode flows through the bellows, and the bellows itself also generates heat. Therefore, the capacitor of the electrostatic capacitance variable type is likely to rise in temperature by energization.
  • the present invention has been made in view of the above circumstances, and an object thereof is to provide a technology that contributes to the improvement of the cooling performance of a capacitor.
  • a container having a fixed end plate at one end of the insulating cylindrical portion and a movable end plate at the other end;
  • a fixed electrode provided in the container;
  • a movable electrode disposed in the container opposite to the fixed electrode;
  • a movable lead provided on the movable electrode for moving the movable electrode in the axial direction of the container;
  • a first bellows provided on the outer peripheral side of the movable lead and inside the movable side end plate, and capable of moving the movable lead while maintaining the airtightness of the container;
  • a second bellows provided between the movable end plate and the movable electrode and not coaxial with the first bellows.
  • a hole is formed in the second bellows connection portion of the movable side end plate.
  • Another aspect of the capacitor of the present invention for achieving the above object is characterized in that
  • the second bellows is provided on the circumference of the movable lead about the axis thereof.
  • the cooling performance of the capacitor is improved.
  • the vacuum capacitor 1 (capacitor, the same in the following) according to the embodiment of the present invention is configured by opposingly arranging the fixed electrode 3 and the movable electrode 4 in the vacuum vessel 2 (vessel, the same in the following). Ru.
  • the vacuum vessel 2 is closed with, for example, an insulating cylindrical portion 5 formed of a ceramic or the like by a fixed side end plate / fixed electrode attachment conductor 6 (fixed side end plate, the same applies hereinafter) and a movable side end plate 7. It is formed.
  • the fixed electrode 3 is formed by attaching a plurality of cylindrical electrode plates F 1 , F 2 ,..., F n different in diameter (radius) concentrically at regular intervals on the inside of the plate-shaped fixed electrode attachment conductor 6 Ru.
  • Movable electrode 4 the electrode plates F 1, F 2 of the fixed electrode 3, ..., F n in the gap, so that it can be inserted and out in a non-contact state, a plurality of cylindrical electrode plates M 1, M having different diameters , 2 to M n are formed on the plate-like movable electrode attachment conductor 8.
  • a movable lead 9 is provided on the surface of the movable electrode attachment conductor 8 opposite to the surface on which the cylindrical electrode plates M 1 , M 2 ,..., M n are provided.
  • the movable lead 9 penetrating portion of the movable side end plate 7 is provided with a bellows 10 (first bellows, hereinafter the same). Further, a bellows 11 (second bellows, hereinafter the same) is provided between the movable electrode attachment conductor 8 and the movable side end plate 7.
  • the movable lead 9 is rotatably supported by a bearing (not shown) provided through the movable end plate 7 so as not to be rotatable and vertically movable, and the movable electrode 4 is mounted on the axis of the vacuum container 2 from the outside of the vacuum container 2. Move in the direction.
  • One end of the movable lead 9 is connected to the movable electrode attachment conductor 8.
  • the other end of the movable lead 9 is provided through the movable side end plate 7, and the capacitance adjustment unit 12 is provided at this end.
  • the bellows 10 is provided on the outer peripheral side of the movable lead 9 and inside the movable side end plate 7. One end of the bellows 10 is brazed to the movable end plate 7, and the other end is brazed to the movable electrode attachment conductor 8. By providing the bellows 10 so as to cover the movable lead 9 penetrating portion of the movable side end plate 7, the movable lead 9 can be moved in the axial direction of the vacuum vessel 2 while maintaining the vacuum of the vacuum vessel 2.
  • the bellows 11 is a telescopic tube having a bellows structure, one end of which is connected to the movable end plate 7 and the other end of which is connected to the movable electrode attachment conductor 8.
  • a hole 7a is formed in the bellows 11 connection portion of the movable side end plate 7, and the movable electrode attachment conductor 8 can be directly cooled through the hole 7a (and the bellows 11).
  • At least one bellows 11 may be provided at a position not coaxial with the bellows 10, and the optimum number is selected according to the heat generation at the time of use of the vacuum capacitor 1. Further, the position and size of the bellows 11 are selected so as to obtain the required cooling performance in the bellows 11. Further, by arranging the bellows 11 at equal intervals on the circumference around the axis of the movable lead 9, the deviation of the self-closing force caused by the pressure difference between the inside and the outside of the vacuum vessel 2 is reduced.
  • the capacitance adjustment unit 12 is configured of a capacitance adjustment screw 13 attached to an end of the movable lead 9 and a screw receiving portion 14 supporting the capacitance adjustment screw 13.
  • a screw portion 13a is formed which is screwed and attached to a screw portion 9a formed at the end of the movable lead 9. At the other end, the electrostatic capacitance adjustment screw 13 is rotated.
  • the operation part 13b to which the motor etc. which are made to be connected is connected is provided.
  • the screw receiving portion 14 is attached to the movable side end plate 7.
  • the capacitance adjustment screw 13 is rotatably attached to the screw receiving portion 14 via a thrust bearing (not shown).
  • the movable lead 9 By rotating the operation portion 13 b of the capacitance adjustment screw 13 manually or by a motor or the like, the movable lead 9 is moved in the axial direction according to the rotation of the capacitance adjustment screw 13.
  • the movable electrode 4 moves in the axial direction of the vacuum vessel 2 according to the movement of the movable lead 9.
  • the capacitance of the vacuum capacitor 1 is adjusted to a predetermined value.
  • a guide pin (or a guide portion) is provided at the fixed electrode axial center of the fixed electrode attachment conductor 6, and the guide pin is inserted into the movable electrode axial center of the movable electrode attachment conductor 8.
  • a guide portion (or a guide pin) for guiding can also be provided.
  • the guide pins and the guide portions are not necessarily required, but the provision of the guide pins and the guide portions can improve the accuracy in sliding the movable electrode 4.
  • FIG. 1 An example of the cooling aspect of the vacuum capacitor 1 is shown in FIG.
  • a heat sink 15 is provided in the bellows 11, and the movable electrode attachment conductor 8 and the bellows 11 are cooled by the heat sink 15.
  • the cooling means such as the heat sink 15
  • the movable electrode attachment conductor 8 and the bellows 11 can be directly cooled, and the cooling efficiency of the movable electrode attachment conductor 8 and the bellows 11 is improved.
  • cooling means for the movable electrode attachment conductor 8 and the bellows 11 not only the heat sink 15 but also various cooling means such as air cooling, water cooling, oil cooling and the like can be applied.
  • the cooling performance of the vacuum capacitor 1 can be improved.
  • the amount of energization per one can be reduced, and heat generation can be suppressed. As a result, it is possible to extend the life of the bellows 11 (and the bellows 10). Further, the bellows 11 other than the bellows 10 provided in the vicinity of the movable lead 9 can directly cool the bellows 11 in the vicinity of the movable electrode and in the process of being supplied with electricity. As a result, the cooling performance of the vacuum capacitor 1 is improved, and in particular, the vacuum capacitor 1 can be suitably used for high current applications.
  • the self-closing force in the case where the surface area of the bellows is the same may be smaller in the vacuum capacitor 1 provided with the plurality of bellows 10 and 11 than in the vacuum capacitor 16 provided with the single bellows 10 as shown in FIG. it can. This is because the area of the movable electrode attachment conductor 8 in contact with the atmosphere can be reduced by providing the plurality of bellows 10 and 11.
  • the autistic force is generated by the pressure difference between the inside and the outside of the vacuum vessel 2 and works in the vertical direction of the movable electrode support, and the movable portion (the movable electrode 4 and the movable lead 9) can be The torque of the motor to be moved can be reduced. That is, the vacuum capacitor 1 according to the embodiment of the present invention includes the plurality of bellows 10 and 11 to increase the surface area of the bellows 10 and 11 to improve the cooling efficiency and of the movable electrode attachment conductor 8 in contact with the atmosphere. An increase in area can be suppressed.
  • the cooling efficiency can be improved by the increased surface area as compared to the vacuum condenser 16 having a single bellows 10, and a larger current flows. Will be able to
  • the capacitor of the present invention was explained showing the concrete embodiment, the capacitor of the present invention is not limited to the embodiment, and the design can be suitably changed without losing the feature. Those modified in design are also within the technical scope of the present invention.
  • the present invention can be applied to a gas-filled capacitor as well as the vacuum capacitor.
  • a vacuum capacitor having an electrode shape in which cylindrical electrode plates are arranged concentrically has been described as an example, but the electrode shape of the vacuum capacitor is not limited. It is also good.
  • the pressure resistance of the bellows 10 and 11 improves by making the bellows 10 or the bellows 11 into a double structure (double bellows).
  • the cooling medium contacts the bellows on the atmosphere side, and the bellows on the vacuum vessel 2 side is indirectly cooled.
  • the cooling performance of the vacuum capacitor 1 is lowered compared to the case where the hole 7a is present, but the current-carrying performance remains unchanged and the self-closing force is reduced Can have an effect.

Abstract

A vacuum capacitor (1) in which a fixed electrode (3) and a movable electrode (4) are opposed to each other in a vacuum container (2). The vacuum container (2) is formed by closing an insulating cylinder portion (5) with a fixed-side plate/fixed electrode-attached conductor (6) and a movable-side end plate (7). The movable electrode (4) is provided with a movable lead (9), and the movable electrode (4) is moved by way of the movable lead (9) in an axial direction of the vacuum container (2). The movable lead (9) is provided penetrating through the movable-side end plate (7), and a bellows (10) is provided on the outer peripheral side of the movable lead (9) and on the inside of the movable-side end plate (7). A bellows (11) is provided between the movable-side end plate (7) and the movable electrode (4)(movable electrode-attached conductor (8)).

Description

コンデンサCapacitor
　本発明は、コンデンサに関する。特に、真空コンデンサの冷却構造に関する。 The present invention relates to a capacitor. In particular, the invention relates to a cooling structure of a vacuum capacitor.
　図３に示すように、従来技術に係る真空コンデンサ１６は、真空容器２内に組み込まれた一対の電極（固定電極３および可動電極４）を備える。そして、固定電極３に備えられた径の異なる複数の円筒状電極板Ｆ1、Ｆ2、…、Ｆnの間隙内に、可動電極４に備えられた径の異なる複数の円筒状電極板Ｍ1、Ｍ2、…、Ｍnを非接触に挿入して静電容量が形成される。 As shown in FIG. 3, the vacuum capacitor 16 according to the prior art includes a pair of electrodes (fixed electrode 3 and movable electrode 4) incorporated in the vacuum vessel 2. A plurality of cylindrical electrode plates M having different diameters provided to the movable electrode 4 within the gaps of the plurality of cylindrical electrode plates F 1 , F 2 ,..., F n having different diameters provided on the fixed electrode 3 1, M 2, ..., a capacitance is formed by inserting a non-contact M n.
　真空容器２は、セラミックス等により形成された絶縁性の円筒部５を固定側端板兼固定電極取付導体６と可動側端板７で閉塞して形成される。可動電極４には可動リード９の一端が設けられる。可動リード９の他端には静電容量調節部１２が設けられ、真空容器２の外部から可動電極４を真空容器２の軸線方向に移動可能となっている。また、可動リード９の外周部であって可動側端板７内部にはベローズ１０が設けられており、真空容器２の真空を保ったまま可動リード９が真空容器２の軸線方向に移動可能となっている。 The vacuum vessel 2 is formed by closing the insulating cylindrical portion 5 formed of ceramics or the like with the fixed side end plate / fixed electrode attachment conductor 6 and the movable side end plate 7. The movable electrode 4 is provided with one end of a movable lead 9. An electrostatic capacity adjustment unit 12 is provided at the other end of the movable lead 9 so that the movable electrode 4 can be moved in the axial direction of the vacuum vessel 2 from the outside of the vacuum vessel 2. Further, a bellows 10 is provided on the outer periphery of the movable lead 9 and in the movable side end plate 7 so that the movable lead 9 can move in the axial direction of the vacuum vessel 2 while maintaining the vacuum of the vacuum vessel 2. It has become.
　真空コンデンサ１６を使用する際、電流を流すため内在する電極で発熱が生じる。固定タイプの真空コンデンサであれば、電極が接合されているため、フランジ（端板）を冷却することで対応できる。 When the vacuum capacitor 16 is used, heat is generated at the underlying electrode to flow the current. If it is a fixed type vacuum capacitor, since the electrodes are joined, it can be coped with by cooling the flange (end plate).
　静電容量可変タイプのコンデンサでは、可動電極はベローズを介して容器奥に存在するため、可動電極を直接冷却することが困難である。また、可動電極を流れる電流は、ベローズを流れ、ベローズ自体も発熱する。したがって、静電容量可変タイプのコンデンサは、通電により温度が上昇しやすい。 In the variable capacitance type capacitor, it is difficult to directly cool the movable electrode because the movable electrode is present at the back of the container via the bellows. Also, the current flowing through the movable electrode flows through the bellows, and the bellows itself also generates heat. Therefore, the capacitor of the electrostatic capacitance variable type is likely to rise in temperature by energization.
特開平０８－０９７０８７号公報Japanese Patent Application Publication No. 08-097087
　本発明は、上記事情に鑑みて成されたものであり、コンデンサの冷却性能の向上に貢献する技術を提供することを目的としている。 The present invention has been made in view of the above circumstances, and an object thereof is to provide a technology that contributes to the improvement of the cooling performance of a capacitor.
　上記目的を達成する本発明のコンデンサの一態様は、
　絶縁性の円筒部の一端側に固定側端板、他端側に可動側端板が設けられた容器と、
　該容器内に設けられる固定電極と、
　前記固定電極と向かい合って前記容器内に配置される可動電極と、
　前記可動電極に設けられ、前記可動電極を前記容器の軸線方向に移動させる可動リードと、
　該可動リードの外周側であって前記可動側端板の内側に設けられ、前記容器の気密性を保った状態で前記可動リードの移動を可能とする第１ベローズと、
　前記可動側端板と前記可動電極との間であって、前記第１ベローズと同軸とならないように、少なくとも１つ備えられる第２ベローズと、を備える。 One aspect of the capacitor of the present invention for achieving the above object is
A container having a fixed end plate at one end of the insulating cylindrical portion and a movable end plate at the other end;
A fixed electrode provided in the container;
A movable electrode disposed in the container opposite to the fixed electrode;
A movable lead provided on the movable electrode for moving the movable electrode in the axial direction of the container;
A first bellows provided on the outer peripheral side of the movable lead and inside the movable side end plate, and capable of moving the movable lead while maintaining the airtightness of the container;
And a second bellows provided between the movable end plate and the movable electrode and not coaxial with the first bellows.
　また、上記目的を達成する本発明のコンデンサの他の態様は、上記コンデンサにおいて、
　前記可動側端板の前記第２ベローズ接続部に孔が形成される。 In addition, another aspect of the capacitor of the present invention for achieving the above object is characterized in that
A hole is formed in the second bellows connection portion of the movable side end plate.
　また、上記目的を達成する本発明のコンデンサの他の態様は、上記コンデンサにおいて、
　前記第２ベローズは、前記可動リードの軸を中心とした周上に設けられる。 In addition, another aspect of the capacitor of the present invention for achieving the above object is characterized in that
The second bellows is provided on the circumference of the movable lead about the axis thereof.
　以上の発明によれば、コンデンサの冷却性能が向上する。 According to the above invention, the cooling performance of the capacitor is improved.
（ａ）本発明の実施形態に係る真空コンデンサの断面図、（ｂ）本発明の実施形態に係る真空コンデンサの上面図である。(A) It is sectional drawing of the vacuum capacitor concerning embodiment of this invention, (b) It is a top view of the vacuum capacitor concerning embodiment of this invention. 本発明の実施形態に係る真空コンデンサの冷却例を示す断面図である。It is a sectional view showing an example of cooling of a vacuum condenser concerning an embodiment of the present invention. 従来技術に係る真空コンデンサの断面図である。It is sectional drawing of the vacuum capacitor which concerns on a prior art.
　本発明の実施形態に係るコンデンサについて、図面に基づいて詳細に説明する。 A capacitor according to an embodiment of the present invention will be described in detail based on the drawings.
　図１に示すように、本発明の実施形態に係る真空コンデンサ１（コンデンサ、以下同じ）は、真空容器２（容器、以下同じ）内に固定電極３と可動電極４を対向配置して構成される。 As shown in FIG. 1, the vacuum capacitor 1 (capacitor, the same in the following) according to the embodiment of the present invention is configured by opposingly arranging the fixed electrode 3 and the movable electrode 4 in the vacuum vessel 2 (vessel, the same in the following). Ru.
　真空容器２は、例えば、セラミックス等により形成された絶縁性の円筒部５を固定側端板兼固定電極取付導体６（固定側端板、以下同じ）と可動側端板７とで閉塞して形成される。 The vacuum vessel 2 is closed with, for example, an insulating cylindrical portion 5 formed of a ceramic or the like by a fixed side end plate / fixed electrode attachment conductor 6 (fixed side end plate, the same applies hereinafter) and a movable side end plate 7. It is formed.
　固定電極３は、板状の固定電極取付導体６の内側に、径（半径）の異なる複数の円筒状電極板Ｆ1、Ｆ2、…、Ｆnを同心円状に一定間隔をもって取り付けて形成される。 The fixed electrode 3 is formed by attaching a plurality of cylindrical electrode plates F 1 , F 2 ,..., F n different in diameter (radius) concentrically at regular intervals on the inside of the plate-shaped fixed electrode attachment conductor 6 Ru.
　可動電極４は、固定電極３の各電極板Ｆ1、Ｆ2、…、Ｆnの間隙内に、非接触状態で挿出入できるように、径の異なる複数の円筒状電極板Ｍ1、Ｍ2、…、Ｍnを板状の可動電極取付導体８に設けて形成される。 Movable electrode 4, the electrode plates F 1, F 2 of the fixed electrode 3, ..., F n in the gap, so that it can be inserted and out in a non-contact state, a plurality of cylindrical electrode plates M 1, M having different diameters , 2 to M n are formed on the plate-like movable electrode attachment conductor 8.
　可動電極取付導体８の円筒状電極板Ｍ1、Ｍ2、…、Ｍnが設けられた面と反対側の面には、可動リード９が設けられる。可動側端板７の可動リード９貫通部には、ベローズ１０（第１ベローズ、以下同じ）が設けられる。また、可動電極取付導体８と可動側端板７との間にはベローズ１１（第２ベローズ、以下同じ）が設けられる。 A movable lead 9 is provided on the surface of the movable electrode attachment conductor 8 opposite to the surface on which the cylindrical electrode plates M 1 , M 2 ,..., M n are provided. The movable lead 9 penetrating portion of the movable side end plate 7 is provided with a bellows 10 (first bellows, hereinafter the same). Further, a bellows 11 (second bellows, hereinafter the same) is provided between the movable electrode attachment conductor 8 and the movable side end plate 7.
　可動リード９は、可動側端板７を貫通して設けられた軸受（図示せず）に回動不能で上下動自在に支承され、真空容器２の外部から可動電極４を真空容器２の軸線方向に移動させる。可動リード９の一端は、可動電極取付導体８に接続される。可動リード９の他端は、可動側端板７を挿通して設けられており、この端部に静電容量調節部１２が設けられる。 The movable lead 9 is rotatably supported by a bearing (not shown) provided through the movable end plate 7 so as not to be rotatable and vertically movable, and the movable electrode 4 is mounted on the axis of the vacuum container 2 from the outside of the vacuum container 2. Move in the direction. One end of the movable lead 9 is connected to the movable electrode attachment conductor 8. The other end of the movable lead 9 is provided through the movable side end plate 7, and the capacitance adjustment unit 12 is provided at this end.
　ベローズ１０は、可動リード９の外周側であって可動側端板７の内側に設けられる。ベローズ１０の一端は可動側端板７とろう付けされ、他端側は可動電極取付導体８にろう付けされる。可動側端板７の可動リード９貫通部を覆うようにベローズ１０を設けることで、真空容器２の真空を保った状態で、可動リード９を真空容器２の軸線方向に移動させることができる。 The bellows 10 is provided on the outer peripheral side of the movable lead 9 and inside the movable side end plate 7. One end of the bellows 10 is brazed to the movable end plate 7, and the other end is brazed to the movable electrode attachment conductor 8. By providing the bellows 10 so as to cover the movable lead 9 penetrating portion of the movable side end plate 7, the movable lead 9 can be moved in the axial direction of the vacuum vessel 2 while maintaining the vacuum of the vacuum vessel 2.
　ベローズ１１は、例えば、図１（ｂ）に示すように、可動リード９の周りに４つ備えられる。ベローズ１１は蛇腹構造を有する伸縮管であり、一端が可動側端板７に接続され、他端が可動電極取付導体８に接続される。可動側端板７のベローズ１１接続部には孔７ａが形成されており、この孔７ａ（およびベローズ１１）を通して可動電極取付導体８を直接冷却できるようになっている。この孔７ａを覆うようにベローズ１１を設けることで、真空容器２の真空を保った状態で、可動電極４および可動リード９を真空容器２の軸線方向に移動させることができる。なお、ベローズ１１は、ベローズ１０と同軸とならない位置に少なくとも１つ以上備えればよく、真空コンデンサ１の使用時の発熱に応じてその最適な数が選択される。また、ベローズ１１において必要な冷却性能が得られるようにベローズ１１の位置や大きさが選択される。また、ベローズ１１を可動リード９の軸を中心とした周上に等間隔に配置することで、真空容器２の内外の圧力差により生じる自閉力の偏りが低減される。 For example, as shown in FIG. 1 (b), four bellows 11 are provided around the movable lead 9. The bellows 11 is a telescopic tube having a bellows structure, one end of which is connected to the movable end plate 7 and the other end of which is connected to the movable electrode attachment conductor 8. A hole 7a is formed in the bellows 11 connection portion of the movable side end plate 7, and the movable electrode attachment conductor 8 can be directly cooled through the hole 7a (and the bellows 11). By providing the bellows 11 so as to cover the hole 7 a, the movable electrode 4 and the movable lead 9 can be moved in the axial direction of the vacuum vessel 2 while maintaining the vacuum of the vacuum vessel 2. At least one bellows 11 may be provided at a position not coaxial with the bellows 10, and the optimum number is selected according to the heat generation at the time of use of the vacuum capacitor 1. Further, the position and size of the bellows 11 are selected so as to obtain the required cooling performance in the bellows 11. Further, by arranging the bellows 11 at equal intervals on the circumference around the axis of the movable lead 9, the deviation of the self-closing force caused by the pressure difference between the inside and the outside of the vacuum vessel 2 is reduced.
　静電容量調節部１２は、可動リード９の端部に取り付けられる静電容量調整ねじ１３と、静電容量調整ねじ１３が支持されるねじ受部１４により構成される。 The capacitance adjustment unit 12 is configured of a capacitance adjustment screw 13 attached to an end of the movable lead 9 and a screw receiving portion 14 supporting the capacitance adjustment screw 13.
　静電容量調整ねじ１３の一端には、可動リード９の端部に形成されたねじ部９ａにねじ込んで取り付けられるねじ部１３ａが形成され、他端には、静電容量調整ねじ１３を回動させるモータ等が接続される操作部１３ｂが備えられる。 At one end of the electrostatic capacitance adjustment screw 13, a screw portion 13a is formed which is screwed and attached to a screw portion 9a formed at the end of the movable lead 9. At the other end, the electrostatic capacitance adjustment screw 13 is rotated. The operation part 13b to which the motor etc. which are made to be connected is connected is provided.
　ねじ受部１４は、可動側端板７に取り付けられる。静電容量調整ねじ１３は、ねじ受部１４にスラストベアリング（図示せず）を介して回転自在に取り付けられる。 The screw receiving portion 14 is attached to the movable side end plate 7. The capacitance adjustment screw 13 is rotatably attached to the screw receiving portion 14 via a thrust bearing (not shown).
　静電容量調整ねじ１３の操作部１３ｂを手動またはモータ等で回転することで、静電容量調整ねじ１３の回転に応じて可動リード９がその軸線方向に移動する。この可動リード９の移動に応じて可動電極４が真空容器２の軸線方向に移動する。このように可動リード９を介して固定電極３と可動電極４の対向する面積が調節されることで、真空コンデンサ１の静電容量が所定の値に調節される。 By rotating the operation portion 13 b of the capacitance adjustment screw 13 manually or by a motor or the like, the movable lead 9 is moved in the axial direction according to the rotation of the capacitance adjustment screw 13. The movable electrode 4 moves in the axial direction of the vacuum vessel 2 according to the movement of the movable lead 9. By adjusting the facing area of the fixed electrode 3 and the movable electrode 4 through the movable lead 9 as described above, the capacitance of the vacuum capacitor 1 is adjusted to a predetermined value.
　なお、図示省略しているが、固定電極取付導体６の固定電極軸心部にガイドピン（または、ガイド部）を設け、可動電極取付導体８の可動電極軸心部にガイドピンを挿入して案内するガイド部（または、ガイドピン）を設けることもできる。これらガイドピンおよびガイド部は、必ずしも必要なものではないが、ガイドピンおよびガイド部を設けることで可動電極４を摺動する際の精度を向上させることができる。 Although not shown, a guide pin (or a guide portion) is provided at the fixed electrode axial center of the fixed electrode attachment conductor 6, and the guide pin is inserted into the movable electrode axial center of the movable electrode attachment conductor 8. A guide portion (or a guide pin) for guiding can also be provided. The guide pins and the guide portions are not necessarily required, but the provision of the guide pins and the guide portions can improve the accuracy in sliding the movable electrode 4.
　図２に、真空コンデンサ１の冷却態様の一例を示す。この例では、ベローズ１１内にヒートシンク１５を設け、このヒートシンク１５で可動電極取付導体８およびベローズ１１を冷却している。このように、ベローズ１１にヒートシンク１５等の冷却手段を備えることで、可動電極取付導体８やベローズ１１を直接冷却することが可能となり、可動電極取付導体８やベローズ１１の冷却効率が向上する。なお、可動電極取付導体８やベローズ１１の冷却手段は、ヒートシンク１５だけでなく、空冷、水冷、油冷等の様々な冷却手段を適用することができる。 An example of the cooling aspect of the vacuum capacitor 1 is shown in FIG. In this example, a heat sink 15 is provided in the bellows 11, and the movable electrode attachment conductor 8 and the bellows 11 are cooled by the heat sink 15. As described above, by providing the bellows 11 with the cooling means such as the heat sink 15, the movable electrode attachment conductor 8 and the bellows 11 can be directly cooled, and the cooling efficiency of the movable electrode attachment conductor 8 and the bellows 11 is improved. As cooling means for the movable electrode attachment conductor 8 and the bellows 11, not only the heat sink 15 but also various cooling means such as air cooling, water cooling, oil cooling and the like can be applied.
　以上のような本発明の実施形態に係る真空コンデンサ１によれば、真空コンデンサ１の冷却性能を向上させることができる。 According to the vacuum capacitor 1 according to the embodiment of the present invention as described above, the cooling performance of the vacuum capacitor 1 can be improved.
　また、ベローズ１１を通して可動電極近傍（具体的には、可動電極取付導体８）を露出させることで、発熱部位である可動側電極近傍とベローズ１１の両方に対して、空冷、水冷、油冷等の様々な冷却手段をとることができる。 Further, by exposing the vicinity of the movable electrode (specifically, the movable electrode attachment conductor 8) through the bellows 11, air cooling, water cooling, oil cooling, etc. are performed to both the vicinity of the movable electrode which is a heat generating portion and the bellows 11. Various cooling means can be taken.
　また、通電用のベローズ１１を複数備えることで、一つあたりの通電量を減らし、発熱を抑えることができる。その結果、ベローズ１１（およびベローズ１０）の寿命を延ばすことが可能となる。また、可動リード９付近に備えられたベローズ１０以外のベローズ１１で、可動側電極近傍および通電中のベローズ１１を直接冷却できる。その結果、真空コンデンサ１の冷却性能が向上し、特に、真空コンデンサ１を大電流用途に好適に用いることができる。 Further, by providing a plurality of the bellows 11 for energization, the amount of energization per one can be reduced, and heat generation can be suppressed. As a result, it is possible to extend the life of the bellows 11 (and the bellows 10). Further, the bellows 11 other than the bellows 10 provided in the vicinity of the movable lead 9 can directly cool the bellows 11 in the vicinity of the movable electrode and in the process of being supplied with electricity. As a result, the cooling performance of the vacuum capacitor 1 is improved, and in particular, the vacuum capacitor 1 can be suitably used for high current applications.
　また、図３に示すような単一のベローズ１０を備えた真空コンデンサ１６よりも複数のベローズ１０、１１を備える真空コンデンサ１の方が、ベローズ表面積が同じ場合の自閉力を小さくすることができる。これは、複数のベローズ１０、１１を備えることで、大気と接する可動電極取付導体８の面積を小さくすることができるためである。 Further, the self-closing force in the case where the surface area of the bellows is the same may be smaller in the vacuum capacitor 1 provided with the plurality of bellows 10 and 11 than in the vacuum capacitor 16 provided with the single bellows 10 as shown in FIG. it can. This is because the area of the movable electrode attachment conductor 8 in contact with the atmosphere can be reduced by providing the plurality of bellows 10 and 11.
　自閉力は、真空容器２内外の差圧により生じ、可動電極支持部の鉛直方向に対して働く力であり、自閉力を小さくすることで可動部（可動電極４や可動リード９）を動かすモータのトルクを小さくすることができる。つまり、本発明の実施形態に係る真空コンデンサ１は、複数のベローズ１０、１１を備えることで、ベローズ１０、１１の表面積を増やして冷却効率を向上させるとともに、大気と接する可動電極取付導体８の面積の増加を抑えることができる。その結果、同じ大きさの自閉力が働く場合において、単一のベローズ１０を備えた真空コンデンサ１６と比較して表面積が増加した分だけ冷却効率を向上させることができ、より大きな電流を流すことができるようになる。 The autistic force is generated by the pressure difference between the inside and the outside of the vacuum vessel 2 and works in the vertical direction of the movable electrode support, and the movable portion (the movable electrode 4 and the movable lead 9) can be The torque of the motor to be moved can be reduced. That is, the vacuum capacitor 1 according to the embodiment of the present invention includes the plurality of bellows 10 and 11 to increase the surface area of the bellows 10 and 11 to improve the cooling efficiency and of the movable electrode attachment conductor 8 in contact with the atmosphere. An increase in area can be suppressed. As a result, in the case where the self-closing force of the same size works, the cooling efficiency can be improved by the increased surface area as compared to the vacuum condenser 16 having a single bellows 10, and a larger current flows. Will be able to
　なお、図３に示した真空コンデンサ１６のベローズ１０の径を大きくしてベローズ１０表面積を増やした場合、複数のベローズ１０、１１を備えて同じ表面積分増加させた場合と比較して大気と接する可動電極取付導体８の面積が増加し、自閉力が大きくなると考えられる。 When the surface area of the bellows 10 is increased by enlarging the diameter of the bellows 10 of the vacuum capacitor 16 shown in FIG. 3, it contacts with the atmosphere compared to the case where the surface integral is increased by providing a plurality of bellows 10 and 11. It is thought that the area of the movable electrode attachment conductor 8 increases and the self-closing force increases.
　以上、具体的な実施形態を示して本発明のコンデンサについて説明したが、本発明のコンデンサは、実施形態に限定されるものではなく、その特徴を損なわない範囲で適宜設計変更が可能であり、設計変更されたものも、本発明の技術的範囲に属する。 As mentioned above, although the capacitor of the present invention was explained showing the concrete embodiment, the capacitor of the present invention is not limited to the embodiment, and the design can be suitably changed without losing the feature. Those modified in design are also within the technical scope of the present invention.
　例えば、実施形態の説明では、真空コンデンサを例示しているが、真空コンデンサ以外にも、ガス封入コンデンサにも適用できる。 For example, although a vacuum capacitor is illustrated in the description of the embodiment, the present invention can be applied to a gas-filled capacitor as well as the vacuum capacitor.
　また、実施形態の説明では、円筒状電極板が同心円状に配置された電極形状の真空コンデンサを例示して説明したが、真空コンデンサの電極形状に制限はなく、例えば、渦巻電極等であってもよい。 Further, in the description of the embodiment, a vacuum capacitor having an electrode shape in which cylindrical electrode plates are arranged concentrically has been described as an example, but the electrode shape of the vacuum capacitor is not limited. It is also good.
　また、ベローズ１０またはベローズ１１を二重構造（二重ベローズ）とすることで、ベローズ１０、１１の耐圧性が向上する。この場合、冷却媒体が接触するのは大気側のベローズとなり、真空容器２側のベローズは間接的に冷却されることとなる。 Moreover, the pressure resistance of the bellows 10 and 11 improves by making the bellows 10 or the bellows 11 into a double structure (double bellows). In this case, the cooling medium contacts the bellows on the atmosphere side, and the bellows on the vacuum vessel 2 side is indirectly cooled.
　また、可動側端板７に孔７ａを形成せずにベローズ１１を設けることで、孔7ａがある場合にくらべ真空コンデンサ１の冷却性能は下がるが、通電性能はそのままで、自閉力を低減する効果を得ることができる。 Further, by providing the bellows 11 without forming the hole 7a in the movable side end plate 7, the cooling performance of the vacuum capacitor 1 is lowered compared to the case where the hole 7a is present, but the current-carrying performance remains unchanged and the self-closing force is reduced Can have an effect.

Claims (3)

  1. 　絶縁性の円筒部の一端側に固定側端板、他端側に可動側端板が設けられた容器と、
    　該容器内に設けられる固定電極と、
    　前記固定電極と向かい合って前記容器内に配置される可動電極と、
    　前記可動電極に設けられ、前記可動電極を前記容器の軸線方向に移動させる可動リードと、
    　該可動リードの外周側であって前記可動側端板の内側に設けられ、前記容器の気密性を保った状態で前記可動リードの移動を可能とする第１ベローズと、
    　前記可動側端板と前記可動電極との間であって、前記第１ベローズと同軸とならないように、少なくとも１つ備えられる第２ベローズと、を備える、コンデンサ。     A container having a fixed end plate at one end of the insulating cylindrical portion and a movable end plate at the other end;
    A fixed electrode provided in the container;
    A movable electrode disposed in the container opposite to the fixed electrode;
    A movable lead provided on the movable electrode for moving the movable electrode in the axial direction of the container;
    A first bellows provided on the outer peripheral side of the movable lead and inside the movable side end plate, and capable of moving the movable lead while maintaining the airtightness of the container;
    A capacitor, comprising: at least one second bellows provided between the movable side end plate and the movable electrode and not coaxial with the first bellows.
  2. 　前記可動側端板の前記第２ベローズ接続部に孔が形成される、請求項１に記載のコンデンサ。 The capacitor according to claim 1, wherein a hole is formed in the second bellows connection portion of the movable side end plate.
  3. 　前記第２ベローズは、前記可動リードの軸を中心とした周上に設けられる、請求項１または請求項２に記載のコンデンサ。 The capacitor according to claim 1, wherein the second bellows is provided on a circumference around an axis of the movable lead.
PCT/JP2018/014913 2017-06-22 2018-04-09 Capacitor WO2018235391A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3496430A (en) * 1967-05-17 1970-02-17 English Electric Valve Co Ltd Evacuated variable condensers
JPH0897086A (en) * 1994-09-29 1996-04-12 Meidensha Corp Vacuum capacitor
JPH0897084A (en) * 1994-09-26 1996-04-12 Meidensha Corp Vacuum capacitor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3496430A (en) * 1967-05-17 1970-02-17 English Electric Valve Co Ltd Evacuated variable condensers
JPH0897084A (en) * 1994-09-26 1996-04-12 Meidensha Corp Vacuum capacitor
JPH0897086A (en) * 1994-09-29 1996-04-12 Meidensha Corp Vacuum capacitor

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