WO2018045935A1 - 一种平面电阻器的外壳结构 - Google Patents

一种平面电阻器的外壳结构 Download PDF

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WO2018045935A1
WO2018045935A1 PCT/CN2017/100451 CN2017100451W WO2018045935A1 WO 2018045935 A1 WO2018045935 A1 WO 2018045935A1 CN 2017100451 W CN2017100451 W CN 2017100451W WO 2018045935 A1 WO2018045935 A1 WO 2018045935A1
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WIPO (PCT)
Prior art keywords
resistor
planar resistor
insulating
planar
housing structure
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PCT/CN2017/100451
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English (en)
French (fr)
Inventor
张翔
陈赤汉
李钊
宋戈
郑力
杨帆
Original Assignee
南京南瑞继保电气有限公司
南京南瑞继保工程技术有限公司
常州博瑞电力自动化设备有限公司
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Application filed by 南京南瑞继保电气有限公司, 南京南瑞继保工程技术有限公司, 常州博瑞电力自动化设备有限公司 filed Critical 南京南瑞继保电气有限公司
Priority to RU2019107767A priority Critical patent/RU2709794C1/ru
Priority to US16/331,134 priority patent/US10636548B2/en
Priority to BR112019004334-9A priority patent/BR112019004334B1/pt
Priority to KR1020197006667A priority patent/KR102153244B1/ko
Priority to EP17848108.1A priority patent/EP3511955B1/en
Priority to CA3035586A priority patent/CA3035586C/en
Priority to JP2019512810A priority patent/JP6792063B2/ja
Publication of WO2018045935A1 publication Critical patent/WO2018045935A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
    • H01C1/022—Housing; Enclosing; Embedding; Filling the housing or enclosure the housing or enclosure being openable or separable from the resistive element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors

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  • the present invention relates to a housing structure of a planar resistor, and more particularly to a housing structure of a voltage equalizing resistor of a semiconductor switching device in a converter valve module, belonging to the field of power electronics.
  • a resistor with a rated voltage of several thousand volts is required.
  • Such resistors are usually made of thick film resistors, have a flat rectangular shape, and the bottom plane is close to the heat sink.
  • the upper surface of the heat sink is attached to the ground surface, or is attached to the lower surface of the heat sink to be mounted on the ground.
  • the electrode outlet ends are all on the same surface, and the mounting wings are conveniently fixed around the periphery, and the mounting wing and the resistor body are reinforced by the reinforcing ribs.
  • the insulating material between the electrodes is polarized, resulting in a charged phenomenon on the surface of the insulating material in a certain area.
  • the first one is mainly that after long-term operation of the resistor, dust and dirt are easily accumulated inside the trench and the corner of the wall, which reduces the creepage distance and affects the safety of the equipment; Dust and dirt in the grooves are also difficult to clean thoroughly during maintenance.
  • the second type of lead-out method causes an increase in the space occupied by the entire resistor. Since the line length is fixed, it is not flexible enough for installation and use. On the connection between the resistor body and the mounting wing, the gap between the reinforcing ribs and the ribs and the wing plate and the resistor body It is easy to accumulate dust and dirt in the corners.
  • the technical problem to be solved by the present invention is to provide an outer casing structure that satisfies the creepage distance of the resistor and is resistant to dirt and dust, in view of the above disadvantages of the prior art.
  • An outer casing structure of a planar resistor characterized in that all electrode lead ends of the planar resistor are on the same side, and the outer casing structure body is an insulating material covering a surface of the resistor, around the electrode lead end of the planar resistor An insulating structure having an opening facing the side of the resistor body is provided.
  • the structure is suitable for electrical resistance of the electrode lead-out end mounted to the ground or laterally.
  • Another solution is an outer casing structure of a planar resistor, characterized in that: the electrode terminal of the planar resistor is on the same side, and the outer casing structure is an insulating material covering the surface of the resistor, and the planar resistor is Around the electrode lead-out end, an insulating structure having an opening facing the outside of the resistor is provided.
  • the structure is adapted to the resistance of the electrode lead-out mounted towards the ground.
  • one end of the insulating structure is a multi-tooth or slot-type structure, and the outer top surface of the other end of the insulating structure is a flat surface; preferably, the cogging cross section of the multi-tooth or slot-type insulating structure To increase the shape of the creepage distance, including square, triangular or curved.
  • the insulating structure completely wraps the electrode or encapsulates an electrode of a portion of the region.
  • the insulating structure is integrally provided as an insulating cap structure, and is flip-mounted according to the orientation of the electrode lead-out end.
  • the insulating structure is built around the two electrodes or is built between the two electrodes.
  • the outer casing of the planar resistor is provided with a mounting wing, and the connection between the mounting wing and the planar resistor body is reinforced by a circular arc or a slope.
  • the structure of the tooth gap increases the creepage distance of the surface of the insulating material between the two electrodes, and the direction of the slot opening always faces the ground or the lateral ground, so that dust and dirt are difficult to enter under the action of gravity.
  • the inside of the alveolar structure avoids the reduction of the creepage distance caused by dust and dirt, and improves the reliability and maintenance-free of the resistor.
  • 1 is a physical diagram of a planar resistor of the prior art solution.
  • FIG. 2 is a three-dimensional view of an example of a housing structure of a planar resistor in which an electrode is mounted to the ground.
  • Figure 3 is a partial cross-sectional view showing an example of the structure of an outer casing of a planar resistor mounted on the ground facing the ground.
  • FIG. 4 is a three-dimensional view of an example of a housing structure of a planar resistor in which an electrode is mounted toward the ground.
  • Fig. 5 is a three-dimensional view showing an example of the structure of an outer casing of a planar resistor mounted on the ground facing the ground.
  • Figure 6 is a partial cross-sectional view showing an example of the structure of an outer casing of a planar resistor mounted on the ground facing the ground.
  • 1 is the insulating material of the resistor body casing
  • 2 is a mounting wing
  • 3 is a multi-tooth or slot-type insulating structure
  • 4 is an electrode terminal
  • 5 is a wing and body reinforcement.
  • reference numeral 6 is a terminal end fastening screw
  • reference numeral 7 is a resistive film structure
  • reference numeral 8 is another multi-tooth or slot type insulating structure
  • reference numeral 9 is another wing-and-body reinforcing structure.
  • the housing structure of the planar resistor provided in this example is applied to the voltage equalizing resistor of the semiconductor switching device in the converter valve module.
  • the resistor of the example is mounted to the ground
  • the electrode terminal 4 is on the upper surface of the resistor
  • the body structure 1 is an insulating structure covering the surface of the resistor film 7, and is surrounded by the electrode terminal 4 of the resistor.
  • a multi-tooth or slot-type insulating structure 3 having an opening to the side of the resistor body, the insulation
  • the top surface of the structure 3 is a flat plane.
  • the insulating structure 3 of the present example has two slots, and the tip and the slot are square in the cross-sectional view.
  • the creepage distance of the electrode terminal 4 needs to pass through the upper surface of the multi-tooth or slot-type insulating structure 3, and then enter the inside of the tooth groove along the surface of the structure, and finally along the electrode insulating wall to the upper surface of the resistor. 1.
  • the creepage distance is greatly improved, and since the opening of the multi-tooth or slot-type insulating structure faces the ground after installation, dust and dirt are difficult to enter, so that the reliability and maintenance-free of the resistor are ensured.
  • connection between the mounting wing 2 and the resistor body is fastened by an arc structure, which avoids the problem of dust and dirt generated by the vertical corners of the ribs when the reinforcing ribs are used and the grooves between the ribs.
  • the solution shown in this example can also be used when the lead-out of the resistor is mounted laterally to the ground.
  • one end of the insulating structure is another tooth or groove type structure, and the outer top surface of the other end of the insulating structure may be a curved surface or a wave surface.
  • the cogging and tip end cross-section of the insulating structure may be triangular, curved or any other shape that may increase the creepage distance; the number of slots of the insulating structure may be arbitrarily configured.
  • the multi-tooth or slot-type insulating structure is designed to be oriented in an inverted direction toward the outside of the resistor body, and the opening is still facing the ground, as shown in FIG.
  • This example also shows a connection structure 9 of another wing and resistor body.
  • the insulating structure may only wrap a part of the range of electrodes, such as only the electrode within a range of 180 degrees toward the other electrode, and no reverse groove provided in the range of 180 degrees, connected to the resistor with a common insulating outer wall. On the insulating cover of the upper surface.
  • the insulating structure as a whole may be an insulating cap structure, which can be flexibly flipped and installed according to the mounting orientation.
  • the insulating structure can be constructed at other locations between the electrodes of the planar resistor. As shown in FIG. 5, the electrode 4 is still surrounded by an ordinary insulating structure having a smooth outer surface, and a multi-tooth or slot-type insulating structure of 8 is designed at a center line position between the electrodes of the resistor.
  • the sectional view is shown in Figure 6. The structure is shaped like a "tree” or "umbrella”.
  • the invention is characterized in that the creepage distance between the planar resistor electrodes is increased by the insulating structure with multi-tooth or slot-shaped features, and the multi-tooth or slot-type insulating structure always keeps the opening facing the ground or according to the electrode mounting orientation.
  • the lateral ground surface functions as a dustproof and antifouling, and enhances the reliability and maintenance-freeness of the planar resistor; those skilled in the art can make variations and modifications within the scope of the claims of the present invention as long as the rights are not exceeded.
  • the scope of the claims is intended to be within the scope of the invention.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Details Of Resistors (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

一种平面电阻器的外壳结构，所述平面电阻器的电极引出端(4)在电阻的同一侧，所述外壳结构主体(1)为覆盖电阻器表面的绝缘材料，在电阻器的电极引出端(4)周围，有开口朝向电阻本侧或外侧的绝缘结构(3)，该绝缘结构(3)设置为多齿或槽型。与现有技术相比，齿槽的结构增大了两电极之间绝缘材料表面的爬电距离，根据电极安装朝向的不同，槽型开口向内或外侧的设计使灰尘和污垢很难进入，提高了电阻器运行的可靠性和免维护性。

Description

一种平面电阻器的外壳结构 技术领域
本发明涉及一种平面电阻器的外壳结构，更具体地说，涉及一种换流阀阀模块内半导体开关器件的均压电阻器的外壳结构，属于电力电子领域。
背景技术
在换流阀内，为保证各半导体开关器件的电压均衡，需要并联额定电压数千伏的电阻器。这种电阻器通常采用厚膜电阻制成，外形为扁的长方体，底部平面紧贴散热器，贴在散热器的上表面背向地面安装，或者贴在散热器下表面朝向地面安装。电极引出端均在同一表面，四周有安装翼板方便固定，安装翼板与电阻器本体通过加强筋加固。因为电极之间电压差较大、距离较近，电极之间的绝缘材料会被电极化，导致之间一定区域的绝缘材料表面呈现带电现象。为保证足够的绝缘能力，需要增大电极之间的绝缘表面距离，即增加爬电距离。
目前一种常见的做法是在电阻器上表面的绝缘外壳上设置一些垂直的沟槽或者隔离墙，如外观专利公开号为CN302578229S的产品，实物图如图1所示，爬电距离为电极间本身的距离加上沟槽或隔离墙上升及下降的高度；另一种做法是利用耐高压绝缘线将电极引出来到一定的长度，这样爬电距离便由电极间本身的距离加上两根引线的长度构成。在平面电阻器与安装翼板的连接这一块，通常都是采用一到两个垂直的加强筋用来紧固。
以上做法都存在一定的缺点，第一种主要是，电阻器在长期运行后，沟槽内部和隔离墙角落里容易积入灰尘、污垢，造成爬电距离的减少，影响设备安全；较窄的沟槽内的灰尘污垢在维护时也难以彻底清理。第二种引出线的做法造成了整个电阻器占用空间增大，由于线长固定，安装使用时也不够灵活。在电阻器本体与安装翼板的连接上，加强筋之间的缝隙和加强筋与翼板、电阻器本体之间的 角落都容易积累灰尘、污垢。
发明内容
本发明所要解决的技术问题是，针对上述现有技术的缺点，提供一种既满足电阻器爬电距离、又能防污防尘的外壳结构。
一种平面电阻器的外壳结构，其特征在于：所述平面电阻器的所有电极引出端在同一侧，所述外壳结构主体为覆盖电阻器表面的绝缘材料，在平面电阻器的电极引出端周围，设置开口朝向电阻本体侧的绝缘结构。
优选的，所述结构适用于电极引出端背向地面或侧向地面安装的电阻。
另一种方案是，一种平面电阻器的外壳结构，其特征在于：所述平面电阻器的电极引出端在同一侧，所述外壳结构主体为覆盖电阻器表面的绝缘材料，在平面电阻器的电极引出端周围，设置开口朝向电阻外侧的绝缘结构。
优选的，所述结构适用于电极引出端朝向地面安装的电阻。
上述两种方案中，所述绝缘结构的一端为多齿或槽型结构，绝缘结构另一端的外顶面为一平整面；优选的，所述多齿或槽型绝缘结构的齿槽横截面为增加爬电距离的形状，包括方形、三角形或弧形。
优选的，上述两种方案中，所述绝缘结构完全包裹电极，或者，包裹一部分区域的电极。
优选的，上述两种方案中，所述绝缘结构整体设置为一个绝缘套帽的结构，根据电极引出端的朝向进行翻转安装。
优选的，上述两种方案中，所述绝缘结构构建在两电极周围，或者，构建在两电极中间。
优选的，上述两种方案中，所述平面电阻器的外壳设置有安装翼板，所述安装翼板和平面电阻器本体的连接通过圆弧或斜面加强连接。
与现有技术相比，齿槽的结构增大了两电极之间绝缘材料表面的爬电距离，槽型开口方向始终朝向地面或侧向地面，使灰尘和污垢在重力的作用下很难进入齿槽结构内部，避免了灰尘污垢造成的爬电距离的减小，提高了电阻器的可靠性和免维护性。
附图说明
图1为现有技术方案的平面电阻器的实物图。
图2为一种电极背向地面安装的平面电阻器的外壳结构实例的三维图。
图3为一种电极背向地面安装的平面电阻器的外壳结构实例的局部剖面图。
图4为一种电极朝向地面安装的平面电阻器的外壳结构实例的三维图。
图5为另一种电极背向地面安装的平面电阻器的外壳结构实例的三维图。
图6为另一种电极背向地面安装的平面电阻器的外壳结构实例的局部剖面图。
图中标号1为电阻器本体外壳绝缘材料，标号2为安装翼板，标号3为一种多齿或槽型绝缘结构，标号4为电极引出端，标号5为一种翼板与本体的加强结构，标号6为引出端接线紧固螺丝，标号7为电阻薄膜结构，标号8为另一种多齿或槽型绝缘结构，标号9为另一种翼板与本体的加强结构。
具体实施方式
下面结合一种实施例，对本发明进行进一步的介绍和描述，但本发明的保护范围不局限于此。
本实例提供的平面电阻器的外壳结构，应用在换流阀阀模块内半导体开关器件的均压电阻上。参阅图2，该实例电阻器背向地面安装，电极引出端4均在电阻器的上表面，外壳结构主体1为覆盖电阻膜7表面的绝缘结构，在电阻器的电极引出端4周围，环绕有开口向电阻本体侧的多齿或槽型绝缘结构3，所述绝缘 结构3的顶面为一平整平面。参见图3的剖面图，本实例的绝缘结构3拥有两个齿槽，剖面视角下齿尖和齿槽均为方形。外部接线通过接线紧固螺丝6进行紧固。所述实例下，电极引出端4的爬电距离需要经过多齿或槽型绝缘结构3的上表面，再沿着该结构表面进入齿槽内部，最后沿着电极绝缘壁到电阻器的上表面1。通过这样的结构设计，爬电距离得到大大提高，同时由于安装后多齿或槽型绝缘结构的开口朝向地面，灰尘、污垢难以进入，使得电阻器的可靠性和免维护性得到保证。图1中安装翼板2与电阻器本体的连接采用弧形的结构紧固，可以避免采用加强筋时筋板的垂直角落和多个筋板之间的沟槽而产生灰尘、污垢的问题。当电阻的引出端侧向地面安装时，也可以采用这个实例所展示的方案。
其他实例中，所述绝缘结构的一端为其他类齿或槽型结构，绝缘结构另一端的外顶面可以为一弧面、波浪面。
其他实例中，所述绝缘结构的齿槽和齿尖横截面可以为三角形、弧形或其他任意可以增加爬电距离的形状；所述绝缘结构的齿槽数可以任意配置。
其他实例中，当所述电阻器的电极引出端朝向地面安装布置时，所述多齿或槽型绝缘结构通过颠倒方向设计，朝向电阻本体外侧，依然保持开口是朝向地面的，如图4，这个实例同时给出了另一种翼板与电阻器本体的连接结构9。
其他实例中，所述绝缘结构可以只包裹一部分范围的电极，如只包裹朝向另一电极的180度范围内的电极，另外180度范围内不设置倒齿槽，用普通绝缘外壁连接到电阻器上表面的绝缘外壳上。
其他实例中，所述绝缘结构整体可以是一个绝缘套帽的结构，可以根据安装朝向，灵活进行翻转安装。
另一种实例是，所述绝缘结构可以构建在平面电阻器的电极之间的其他位置上。如图5所示，电极4周围仍为普通的外表面光滑的绝缘结构包裹，在电阻器两电极之间的中线位置，设计有标号8的多齿或槽型绝缘结构。剖面图如图6， 该结构形如一个“树”状或者“伞”状。
本发明的特点是，利用具有多齿或槽型特征的绝缘结构增大了平面电阻器电极之间的爬电距离，同时根据电极安装朝向，多齿或槽型绝缘结构始终保持开口朝向地面或侧向地面，起到防尘防污的作用，增强平面电阻器的可靠性和免维护性；本领域的技术人员可以在本发明的权利要求范围内作出变形和修改，只要没有超过所述权利要求的范围，都在本发明的保护范围之内。

Claims (10)

  1. 一种平面电阻器的外壳结构，其特征在于：所述平面电阻器的所有电极引出端在同一侧，所述外壳结构主体为覆盖电阻器表面的绝缘材料，在平面电阻器的电极引出端周围，设置开口朝向电阻本体侧的绝缘结构。
  2. 一种平面电阻器的外壳结构，其特征在于：所述平面电阻器的电极引出端在同一侧，所述外壳结构主体为覆盖电阻器表面的绝缘材料，在平面电阻器的电极引出端周围，设置开口朝向电阻外侧的绝缘结构。
  3. 如权利要求1或2所述的平面电阻器外壳结构，其特征在于：所述绝缘结构的一端为多齿或槽型结构，绝缘结构另一端的外顶面为一平整面。
  4. 如权利要求3所述的平面电阻器外壳结构，其特征在于：所述多齿或槽型绝缘结构的齿槽横截面为增加爬电距离的形状，包括方形、三角形或弧形。
  5. 如权利要求1所述的平面电阻器外壳结构，其特征在于：所述结构适用于电极引出端背向地面或侧向地面安装的电阻。
  6. 如权利要求2所述的平面电阻器外壳结构，其特征在于：所述结构适用于电极引出端朝向地面安装的电阻。
  7. 如权利要求1或2所述的平面电阻器外壳结构，其特征在于：所述绝缘结构完全包裹电极，或者，包裹一部分区域的电极。
  8. 如权利要求1或2所述的平面电阻器外壳结构，其特征在于：所述绝缘结构整体设置为一个绝缘套帽的结构，根据电极引出端的朝向进行翻转安装。
  9. 如权利要求1或2所述的平面电阻器外壳结构，其特征在于：所述绝缘结构构建在两电极周围，或者，构建在两电极中间。
  10. 如权利要求1或2所述的平面电阻器外壳结构，其特征在于：所述平面电阻器的外壳设置有安装翼板，所述安装翼板和平面电阻器本体的连接通过圆弧或斜面加强连接。
PCT/CN2017/100451 2016-09-07 2017-09-05 一种平面电阻器的外壳结构 WO2018045935A1 (zh)

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RU2019107767A RU2709794C1 (ru) 2016-09-07 2017-09-05 Конструкция кожуха планарного резистора
US16/331,134 US10636548B2 (en) 2016-09-07 2017-09-05 Housing structure of planar resistor
BR112019004334-9A BR112019004334B1 (pt) 2016-09-07 2017-09-05 Estrutura do compartimento do resistor planar
KR1020197006667A KR102153244B1 (ko) 2016-09-07 2017-09-05 평면 저항기의 하우징 구조
EP17848108.1A EP3511955B1 (en) 2016-09-07 2017-09-05 Housing structured for flat resistance
CA3035586A CA3035586C (en) 2016-09-07 2017-09-05 Housing structure of planar resistor
JP2019512810A JP6792063B2 (ja) 2016-09-07 2017-09-05 平面抵抗器の筐体構造

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