JP2007142142A - Molded transformer, and tap cover used therein - Google Patents

Molded transformer, and tap cover used therein Download PDF

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JP2007142142A
JP2007142142A JP2005333716A JP2005333716A JP2007142142A JP 2007142142 A JP2007142142 A JP 2007142142A JP 2005333716 A JP2005333716 A JP 2005333716A JP 2005333716 A JP2005333716 A JP 2005333716A JP 2007142142 A JP2007142142 A JP 2007142142A
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coil
tap
primary
terminal
cover
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JP4611869B2 (en
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Kohei Sato
孝平 佐藤
Tomohiro Kaizu
朋宏 海津
Masaki Takeuchi
正樹 竹内
Atsushi Suzuki
敦 鈴木
Takuo Nunokawa
拓男 布川
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Hitachi Industrial Equipment Systems Co Ltd
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Hitachi Industrial Equipment Systems Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To so constitute each tap cover that it is simple and its attaching work is easy in a molded transformer. <P>SOLUTION: There is constituted out of an insulating material having each circular flat plane each tap cover which covers each coil-side terminal connected with the wound-off end of each primary-side coil of the molded transformer, and covers each tap switching terminal for switching the tap voltage of each primary-side coil. Further, each tap cover is so constituted as to cover with each circular flat plane both each coil-side terminal and each tap switching terminal. Moreover, each tap cover is so constituted as to be fastened to the side of each lateral surface of each molded coil in the nearly central portion of each circular flat plane. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、モールド変圧器に用いるタップカバーの構成に関する。   The present invention relates to a structure of a tap cover used for a molded transformer.

従来、モールド変圧器のタップカバーは、図５に示すように、矩形状の平板が用いられている。図５において、矩形状平板のタップカバー５ａ'は、モールドコイル１ａ'のコイル側面１ａ１'内で、１次側コイルのタップ電圧を切換えるタップ切換え用端子１３ａ１'、１３ａ２'、１３ａ３'、１３ａ４'、１３ａ５'、及びタップ切換え用接続バー１４ａ'を覆い、絶縁材から成る複数のビス１２１ａ'、１５１ａ'によってコイル側面１ａ１'に固定されている。１６'は、各相間で該端子を接続するための相間接続バーである。 Conventionally, as shown in FIG. 5, a rectangular flat plate is used for a tap cover of a molded transformer. In FIG. 5, the rectangular flat tap cover 5a ′ includes tap switching terminals 13a 1 ′, 13a 2 ′, and 13a 3 for switching the tap voltage of the primary coil within the coil side surface 1a 1 ′ of the molded coil 1a ′. ', 13a 4 ', 13a 5 ', and the tap switching connection bar 14a' are covered and fixed to the coil side surface 1a 1 'by a plurality of screws 121a', 151a 'made of an insulating material. Reference numeral 16 'denotes an interphase connection bar for connecting the terminals between the phases.

また、本発明に関連する従来技術であって、特許文献に記載された技術としては、例えば、特開平５−１３５９６１号公報（特許文献１）や特開２００４−２２１３９４号公報（特許文献２）に記載されたものがある。特開平５−１３５９６１号公報には、１次側コイルの巻終り端が接続されたコイル側端子と、タップ切換え用端子と、該両端子間を接続するタップ切換え用接続バーとがコイル側面内に配された構成が記載され、特開２００４−２２１３９４号公報には、柱上変圧器のタップ切換装置として、タップ切換器を絶縁保護カバーで覆い、絶縁保護カバーを貫通して突出した切換用操作棒を回転させることでタップ端子の接続状態を切り換えるとする技術が記載され、該絶縁保護カバーは、プラスチック製の角筒部４１ａと、その上面に一体に設けられた円板部４１ｂとから成る構成とされている。   Moreover, as a technique related to the present invention and described in the patent document, for example, Japanese Patent Application Laid-Open No. 5-135961 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2004-221394 (Patent Document 2). There is what is described in. Japanese Patent Application Laid-Open No. H5-135961 discloses a coil side terminal to which a winding end of a primary side coil is connected, a tap switching terminal, and a tap switching connection bar for connecting the two terminals. In Japanese Patent Application Laid-Open No. 2004-221394, as a tap changer for a pole transformer, the tap changer is covered with an insulating protective cover, and the switching is made to protrude through the insulating protective cover. A technique is described in which the connection state of the tap terminal is switched by rotating the operation rod, and the insulating protective cover includes a plastic square tube portion 41a and a disc portion 41b provided integrally on the upper surface thereof. It is set as composition.

特開平５−１３５９６１号公報Japanese Patent Laid-Open No. 5-135961 特開２００４−２２１３９４号公報JP 2004-221394 A

上記従来技術のうち、図５に示す技術は、タップカバー５ａ'が矩形状であるため、取付け上で方向性を有する。このために、取付け作業にあたっては該タップカバー５ａ'が所定の方向となるようにする必要がある。また、該タップカバー５ａ'は、複数のビス１２１ａ'、１５１ａ'によってコイル側面１ａ１'に固定される。このため、該タップカバー５ａ'の平面内の各ビス貫通用の孔を、ビス１２１ａ'、１５１ａ'に位置合わせする必要がある。また、特開平５−１３５９６１号公報にはタップカバーの記載はないし、特開２００４−２２１３９４号公報記載の技術は、柱上変圧器のタップ切換装置の技術であって、絶縁保護カバーは、直方体状のタップ切換器の側面を覆う角筒部と上面を覆う円板部とが一体状にされた複雑な構成となっている。
本発明の課題点は、上記従来技術の状況に鑑み、モールド変圧器において、タップカバーを、簡易かつ取付け作業が容易な構成とすることである。
本発明の目的は、上記課題点を解決し、組立てや各端子の保守・点検が容易なタップカバーにより安全性を確保できるモールド変圧器技術を提供することにある。 Among the above-described conventional techniques, the technique shown in FIG. 5 has directionality in mounting because the tap cover 5a ′ has a rectangular shape. For this reason, it is necessary for the tap cover 5a ′ to be in a predetermined direction during the mounting operation. The tap cover 5a ′ is fixed to the coil side surface 1a 1 ′ by a plurality of screws 121a ′ and 151a ′. For this reason, it is necessary to align each screw penetration hole in the plane of the tap cover 5a ′ with the screws 121a ′ and 151a ′. Further, there is no description of a tap cover in JP-A-5-135961, and the technique described in JP-A-2004-221394 is a technique of a tap switching device for a pole transformer, and the insulation protective cover is a rectangular parallelepiped. The rectangular tube portion that covers the side surface of the tap changer and the disc portion that covers the upper surface are integrated.
The subject of this invention is making a tap cover into the structure which is simple and easy to attach in a mold transformer in view of the situation of the said prior art.
An object of the present invention is to solve the above-mentioned problems and to provide a mold transformer technique that can ensure safety by a tap cover that is easy to assemble and maintain and inspect each terminal.

上記課題点を解決するために、本発明では、モールド変圧器の１次側コイルの巻終り端が接続されたコイル側端子と該１次側コイルのタップ電圧を切換えるタップ切換え用端子とを覆うタップカバーを、円形平面部を有した絶縁材で構成し、該円形平面部で、上記コイル側端子と上記タップ切換え用端子とを覆う構成とする。また、タップカバーを、上記円形平面部の略中央部でモールドコイルのコイル側面部側に固定する構成とする。   In order to solve the above-described problems, the present invention covers a coil-side terminal to which a winding end of a primary coil of a molded transformer is connected and a tap switching terminal for switching the tap voltage of the primary coil. The tap cover is made of an insulating material having a circular plane portion, and the coil side terminal and the tap switching terminal are covered with the circular plane portion. Further, the tap cover is configured to be fixed to the coil side surface side of the molded coil at the substantially central portion of the circular flat portion.

本発明によれば、モールド変圧器において、タップカバーを簡易な構成にすることができるとともに取付け作業が容易となる。   According to the present invention, in the molded transformer, the tap cover can have a simple configuration and can be easily attached.

以下、本発明の実施例につき、図面を用いて説明する。
図１〜図４は、本発明の実施例の説明図である。図１は、本発明の実施例としてのモールド変圧器の構成例図、図２は、図１のモールド変圧器のタップ切換え部の構成図、図３は、図２のタップ切換え部の断面図、図４は、タップ切換え部の他の構成例図である。 Embodiments of the present invention will be described below with reference to the drawings.
1-4 is explanatory drawing of the Example of this invention. FIG. 1 is a configuration example diagram of a mold transformer as an embodiment of the present invention, FIG. 2 is a configuration diagram of a tap switching unit of the mold transformer of FIG. 1, and FIG. 3 is a cross-sectional view of the tap switching unit of FIG. FIG. 4 is another configuration example diagram of the tap switching unit.

図１において、１００はモールド変圧器、１ａはＵ相の１次側モールドコイル、１ｂはＶ相の１次側モールドコイル、１ｃはＷ相の１次側モールドコイル、１ａ１は、Ｕ相の１次側モールドコイル１ａの前面側のコイル側面、１ｂ１は、Ｖ相の１次側モールドコイル１ｂの前面側のコイル側面、１ｃ１は、Ｗ相の１次側モールドコイル１ｃの前面側のコイル側面、２ａはＵ相の２次側モールドコイル、２ｂはＶ相の２次側モールドコイル、２ｃはＷ相の２次側モールドコイル、３は、各モールドコイル内に挿入され、環状の磁気回路を形成するコア、１１ａは、Ｕ相の１次側モールドコイル１ａの巻始め端側の１次側端子部、１１ｂは、Ｖ相の１次側モールドコイル１ｂの巻始め端側の１次側端子部、１１ｃは、Ｗ相の１次側モールドコイル１ｃの巻始め端側の１次側端子部、１２ａは、Ｕ相の１次側モールドコイル１ａの巻線（Ｕ相の１次側コイル）の巻終り端が接続される１次側端子（以下、巻終り端側の１次コイル側端子という）、１２ｂはＶ相の１次側モールドコイル１ｂの巻線（Ｖ相の１次側コイル）の巻終り端側の１次コイル側端子、１２ｃはＷ相の１次側モールドコイル１ｃの巻線（Ｗ相の１次側コイル）の巻終り端側の１次コイル側端子、１２１ａは、１次コイル側端子１２ａに結合された固定手段としてのビス、１２１ｂは、１次コイル側端子１２ｂに結合された固定手段としてのビス、１２１ｃは、１次コイル側端子１２ｃに結合された固定手段としてのビスである。 In FIG. 1, 100 is a molded transformer, 1a is a U-phase primary mold coil, 1b is a V-phase primary mold coil, 1c is a W-phase primary mold coil, 1a 1 is a U-phase mold coil The coil side 1b 1 on the front side of the primary side mold coil 1a is the coil side surface on the front side of the V-phase primary mold coil 1b, and 1c 1 is the front side of the W-phase primary mold coil 1c. Coil side surface, 2a is a U-phase secondary mold coil, 2b is a V-phase secondary mold coil, 2c is a W-phase secondary mold coil, 3 is inserted into each mold coil, and an annular magnetic coil The core forming the circuit, 11a is the primary terminal portion on the winding start end side of the U-phase primary mold coil 1a, and 11b is the primary winding end side of the V-phase primary mold coil 1b. The side terminal portion 11c is a W-phase primary mold coil. The primary side terminal portion 12a on the winding start end side of 1c, 12a is a primary side terminal to which the winding end end of the winding of the U phase primary mold coil 1a (U phase primary side coil) is connected ( (Hereinafter referred to as primary coil side terminal on the winding end side), 12b is the primary coil side terminal on the winding end side of the winding of the V-phase primary mold coil 1b (V-phase primary coil), 12c is a primary coil side terminal on the winding end side of the winding of the W phase primary mold coil 1c (W phase primary side coil), 121a is a fixing means coupled to the primary coil side terminal 12a , 121b is a screw as a fixing means coupled to the primary coil side terminal 12b, and 121c is a screw as a fixing means coupled to the primary coil side terminal 12c.

また、１３ａはＵ相の１次側モールドコイル１ａのタップ切換え用端子、１３ｂはＶ相の１次側モールドコイル１ｂのタップ切換え用端子、１３ｃはＷ相の１次側モールドコイル１ｃのタップ切換え用端子、１４ａは、Ｕ相の１次側コイルの巻終り端側の１次コイル側端子１２ａと、タップ切換え用端子１３ａとの間の接続（タップ接続）を切換えるタップ切換え用接続バー、１４ｂは、Ｖ相の１次側コイルの巻終り端側の１次コイル側端子１２ｂと、タップ切換え用端子１３ｂとの間の接続（タップ接続）を切換えるタップ切換え用接続バー、１４ｃは、Ｗ相の１次側コイルの巻終り端側の１次コイル側端子１２ｃと、タップ切換え用端子１３ｃとの間の接続（タップ接続）を切換えるタップ切換え用接続バー、１５ａは、１次コイル側端子１２ａにモールド樹脂内で接続された端子、１５ｂは、１次コイル側端子１２ｂにモールド樹脂内で接続された端子、１５ｃは、１次コイル側端子１２ｃにモールド樹脂内で接続された端子、１６は、端子１５ａ、１５ｂ、１５ｃ間を接続する相間接続バー、５ａは、Ｕ相のモールドコイルのタップ切換え部に用いるタップカバー、５ｂは、Ｖ相のモールドコイルのタップ切換え部に用いるタップカバー、５ｃは、Ｗ相のモールドコイルのタップ切換え部に用いるタップカバー、２１ａは、Ｕ相の２次側モールドコイル（図示なし）の巻線（Ｕ相の２次側コイル）の巻終り端が接続される２次側端子、２１ｂは、Ｖ相の２次側モールドコイル（図示なし）の巻線（Ｖ相の２次側コイル）の巻終り端が接続される２次側端子、２１ｃは、Ｗ相の２次側モールドコイル（図示なし）の巻線（Ｗ相の２次側コイル）の巻終り端が接続される２次側端子、２０は変圧器金具である。   Further, 13a is a tap switching terminal of the U-phase primary mold coil 1a, 13b is a tap switching terminal of the V-phase primary mold coil 1b, and 13c is a tap switching of the W-phase primary mold coil 1c. 14a is a tap switching connection bar for switching the connection (tap connection) between the primary coil side terminal 12a on the winding end side of the U-phase primary side coil and the tap switching terminal 13a. Is a tap switching connection bar for switching the connection (tap connection) between the primary coil side terminal 12b on the winding end side of the V-phase primary coil and the tap switching terminal 13b; The tap switching connection bar for switching the connection (tap connection) between the primary coil side terminal 12c on the winding end side of the primary coil and the tap switching terminal 13c, 15a is the primary coil side end 12a is a terminal connected in the mold resin, 15b is a terminal connected to the primary coil side terminal 12b in the mold resin, 15c is a terminal connected to the primary coil side terminal 12c in the mold resin, 16 Are the phase connection bars for connecting the terminals 15a, 15b and 15c, 5a is a tap cover used for the tap switching part of the U-phase mold coil, 5b is a tap cover used for the tap switching part of the V-phase mold coil, 5c is a tap cover used for a tap switching portion of a W-phase mold coil, and 21a is connected to a winding end of a U-phase secondary mold coil (not shown) winding (U-phase secondary coil). The secondary terminal 21b is a secondary terminal to which the winding end of the winding (V-phase secondary coil) of a V-phase secondary mold coil (not shown) is connected, 21c Phase W Secondary terminals of the winding end terminal connected to the secondary side molded coil (secondary coil of the W-phase) winding of the (not shown), 20 is a transformer bracket.

各相の１次側モールドコイル１ａ、１ｂ、１ｃはそれぞれ、各１次側コイルがモールド樹脂によって筒状体とされ、各相の２次側モールドコイル２ａ、２ｂ、２ｃもそれぞれ、各２次側コイルがモールド樹脂によって筒状体とされている。各相のコイルにおいて、２次側モールドコイル２ａ、２ｂ、２ｃは、１次側モールドコイル１ａ、１ｂ、１ｃの内側に挿入され、該２次側モールドコイル２ａ、２ｂ、２ｃの内側に上記コア３が挿入されている。変圧器金具２０は、コア３の上部を覆うように配され、２次側端子２１ａ、２１ｂ、２１ｃが取付けられている。１次側モールドコイル１ａ、１ｂ、１ｃのそれぞれにおいて、巻始め端側の１次側端子部と、巻終り端側の１次コイル側端子と、タップ切換え用端子は、１つのコイル側面領域内に配される。   The primary side molded coils 1a, 1b, and 1c of each phase are each formed into a cylindrical body by a molding resin, and the secondary side molded coils 2a, 2b, and 2c of each phase are respectively secondary. The side coil is formed into a cylindrical body by mold resin. In each phase coil, the secondary side mold coils 2a, 2b, 2c are inserted inside the primary side mold coils 1a, 1b, 1c, and the core is inside the secondary side mold coils 2a, 2b, 2c. 3 is inserted. The transformer fitting 20 is arranged so as to cover the upper part of the core 3, and the secondary terminals 21a, 21b, and 21c are attached thereto. In each of the primary side mold coils 1a, 1b, and 1c, the primary side terminal portion on the winding start end side, the primary coil side terminal on the winding end end side, and the tap switching terminal are within one coil side surface region. Arranged.

タップカバー５ａ、５ｂ、５ｃはそれぞれ、ガラスやプラスチックなど光透過性の絶縁材から成る円形の平板状部材で構成され、その円形平面部は、コイル側端子とタップ切換え用端子とを覆うことができる寸法とされ、該円形平面部の略中央部で１次側モールドコイルの前面側のコイル側面側に固定されている。
以下、説明中で用いる図１の構成要素には、図１の場合と同じ符号を付して用いるとする。 Each of the tap covers 5a, 5b, and 5c is formed of a circular flat plate member made of a light transmissive insulating material such as glass or plastic, and the circular flat portion covers the coil side terminal and the tap switching terminal. The dimension is such that it can be formed, and is fixed to the coil side surface on the front surface side of the primary mold coil at the substantially central portion of the circular flat surface portion.
Hereinafter, the same reference numerals as those in FIG. 1 are used for the components in FIG. 1 used in the description.

図２は、図１のモールド変圧器１００のＵ相のタップ切換え部（Ａ部）の構成図である。
図２において、Ｕ相のタップ切換え部のタップカバー５ａの円形平面部の略中央部には貫通孔が設けられ、該貫通孔に固定手段としてのビス１２１ａが挿入されている。ビス１２１ａは、円形平板状のタップカバー５ａの略中央部の貫通孔に挿入され、先端側が１次コイル側端子１２ａに結合されることで、該タップカバー５ａを、該１次コイル側端子１２ａ側すなわちＵ相の１次側モールドコイル１ａの前面側のコイル側面１ａ１側に固定する。すなわち、タップカバー５ａは、１個のビス１２１ａによって円形平面部の略中央部で１次側モールドコイル１ａ側に固定され、１次コイル側端子１２ａ、タップ切換え用端子１３ａ、タップ切換え用接続バー１４ａなどを覆う。ただし、取扱いの安全上、該ビス１２１ａも絶縁材で構成されるものとする。 FIG. 2 is a configuration diagram of the U-phase tap switching section (A section) of the molded transformer 100 of FIG.
In FIG. 2, a through hole is provided in a substantially central portion of the circular flat portion of the tap cover 5 a of the U-phase tap switching portion, and a screw 121 a as a fixing means is inserted into the through hole. The screw 121a is inserted into a through hole at a substantially central portion of the circular flat tab-shaped tap cover 5a, and the tip end side is coupled to the primary coil side terminal 12a, so that the tap cover 5a is connected to the primary coil side terminal 12a. side that is fixed to the coil side 1a 1 side of the front side of the primary molded coil 1a of U-phase. That is, the tap cover 5a is fixed to the primary mold coil 1a side at a substantially central portion of the circular flat portion by one screw 121a, and is connected to the primary coil side terminal 12a, the tap switching terminal 13a, and the tap switching connection bar. 14a etc. are covered. However, for safe handling, the screw 121a is also made of an insulating material.

Ｖ相、Ｗ相それぞれのタップ切換え部の場合も上記Ｕ相の場合と同様である。すなわち、Ｖ相のタップ切換え部においては、タップカバー５ｂ（図１）の円形平面部の略中央部には貫通孔が設けられ、該貫通孔に固定手段としてのビス１２１ｂ（図１）が挿入されている。ビス１２１ｂは、円形平板状のタップカバー５ｂの略中央部の貫通孔に挿入され、先端側が１次コイル側端子１２ｂ（図１）に結合されることで、該タップカバー５ｂを、該１次コイル側端子１２ｂ側すなわちＶ相の１次側モールドコイル１ｂ（図１）の前面側のコイル側面１ｂ１（図１）側に固定する。すなわち、タップカバー５ｂは、１個のビス１２１ｂによって円形平面部の略中央部で１次側モールドコイル１ｂ側に固定され、１次コイル側端子１２ｂ、タップ切換え用端子１３ｂ、タップ切換え用接続バー１４ｂなどを覆う。同様に、Ｗ相のタップ切換え部においては、タップカバー５ｃ（図１）の円形平面部の略中央部には貫通孔が設けられ、該貫通孔に固定手段としてのビス１２１ｃ（図１）が挿入されている。ビス１２１ｃ（図１）は、円形平板状のタップカバー５ｃの略中央部の貫通孔に挿入され、先端側が１次コイル側端子１２ｃ（図１）に結合されることで、該タップカバー５ｃを、該１次コイル側端子１２ｃ側すなわちＷ相の１次側モールドコイル１ｃ（図１）の前面側のコイル側面１ｃ１（図１）側に固定する。すなわち、タップカバー５ｃは、１個のビス１２１ｃによって円形平面部の略中央部で１次側モールドコイル１ｃ側に固定され、１次コイル側端子１２ｃ、タップ切換え用端子１３ｃ、タップ切換え用接続バー１４ｃなどを覆う。ビス１２１ｂ、１２１ｃも絶縁材で構成されるものとする。 The case of the tap switching unit for each of the V phase and the W phase is the same as that for the U phase. That is, in the V-phase tap switching portion, a through hole is provided in the substantially central portion of the circular flat portion of the tap cover 5b (FIG. 1), and a screw 121b (FIG. 1) as a fixing means is inserted into the through hole. Has been. The screw 121b is inserted into a through hole at a substantially central portion of the circular flat plate-shaped tap cover 5b, and the tip end side is coupled to the primary coil side terminal 12b (FIG. 1), so that the tap cover 5b is attached to the primary cover. It is fixed to the coil side terminal 12b side, that is, the coil side surface 1b 1 (FIG. 1) side of the front side of the V-phase primary mold coil 1b (FIG. 1). That is, the tap cover 5b is fixed to the primary mold coil 1b side at a substantially central portion of the circular flat portion by one screw 121b, and is connected to the primary coil side terminal 12b, the tap switching terminal 13b, and the tap switching connection bar. 14b etc. are covered. Similarly, in the W-phase tap switching portion, a through hole is provided in a substantially central portion of the circular flat portion of the tap cover 5c (FIG. 1), and a screw 121c (FIG. 1) as a fixing means is provided in the through hole. Has been inserted. The screw 121c (FIG. 1) is inserted into a through hole at a substantially central portion of the circular flat tab cover 5c, and the tip end side is coupled to the primary coil side terminal 12c (FIG. 1). The primary coil side terminal 12c side, that is, the front side coil side surface 1c 1 (FIG. 1) side of the W-phase primary side molded coil 1c (FIG. 1) is fixed. That is, the tap cover 5c is fixed to the primary mold coil 1c side by a single screw 121c at the substantially central portion of the circular plane portion, and is connected to the primary coil side terminal 12c, the tap switching terminal 13c, and the tap switching connection bar. 14c etc. are covered. The screws 121b and 121c are also made of an insulating material.

図３は、図２のＵ相のタップ切換え部の断面図である。
図３において、１２２ａは、Ｕ相の１次コイル側端子１２ａを形成するボルト、１２３ａは、モールド樹脂内においてＵ相の１次側コイル（図示なし）の巻始め端が接続され、Ｕ相の１次コイル側端子１２ａを形成する導体部分、１５１ａは、１次コイル側端子１２ａに接続された端子１５ａを構成するボルト、１５２ａは、同じく１次コイル側端子１２ａに接続された端子１５ａを構成しモールド樹脂内に配される導体部分、１３１ａは、タップ切換え用端子１３ａを構成するボルト、１３２ａは、同じくタップ切換え用端子１３ａを構成しモールド樹脂内に配される導体部分である。他の符号は、図１、図２の場合と同様である。タップカバー５ａは、絶縁材から成る１個のビス１２１ａによってボルト１２２ａに固定される。タップ切換え用接続バー１４ａは、１次コイル側端子１２ａ側においては、ボルト１２２ａによって導体部分１２３ａに固定され、タップ切換え用端子側においては、タップ切換え用端子１３ａに接続される場合には、ボルト１３１ａによって導体部分１３２ａに固定される。また、相間接続バー１６は、ボルト１５１ａによって導体部分１５２ａに固定される。Ｖ相、Ｗ相のタップ切換え部についても、上記Ｕ相の場合と同様である。 3 is a cross-sectional view of the U-phase tap switching portion of FIG.
In FIG. 3, 122a is a bolt that forms the U-phase primary coil side terminal 12a, and 123a is connected to the winding start end of a U-phase primary coil (not shown) in the mold resin. A conductor portion forming the primary coil side terminal 12a, 151a is a bolt constituting the terminal 15a connected to the primary coil side terminal 12a, and 152a is a terminal 15a similarly connected to the primary coil side terminal 12a A conductor portion 131a disposed in the mold resin, 131a is a bolt constituting the tap switching terminal 13a, and 132a is a conductor portion similarly constituting the tap switching terminal 13a and disposed in the mold resin. Other reference numerals are the same as those in FIGS. 1 and 2. The tap cover 5a is fixed to the bolt 122a by a single screw 121a made of an insulating material. The tap switching connection bar 14a is fixed to the conductor portion 123a by a bolt 122a on the primary coil side terminal 12a side, and is connected to the tap switching terminal 13a on the tap switching terminal side. 131a is fixed to the conductor portion 132a. The interphase connection bar 16 is fixed to the conductor portion 152a by a bolt 151a. The V-phase and W-phase tap switching sections are the same as in the U-phase.

図４は、本発明のモールド変圧器におけるタップ切換え部の他の構成例図である。本例は、タップカバーを、光透過性の絶縁材から成り、円形平面部を底部に有する凹状体とした場合である。
５０ａはタップカバー、５０１ａは、タップカバー５０ａの底部の円形平面部、５０２ａは、タップカバー５０ａの外周側面部である。他の符号は、図３の場合と同様である。 FIG. 4 is a diagram illustrating another configuration example of the tap switching unit in the molded transformer according to the present invention. In this example, the tap cover is made of a light-transmitting insulating material and is a concave body having a circular flat portion at the bottom.
50a is a tap cover, 501a is a circular flat portion at the bottom of the tap cover 50a, and 502a is an outer peripheral side surface portion of the tap cover 50a. Other symbols are the same as those in FIG.

図１〜図４で説明した上記実施例によれば、モールド変圧器１００において、タップカバーを簡易な構成にすることができるとともに、その円形平面部の略中央部で１次側モールドコイル側に固定されるため、タップカバー取付け上の方向性がなくなり、取付け作業が容易となる。また、該タップカバーを光透過性の材料で構成しているため、内部の状態を透かして見ることができ、使い勝手性も向上する。   According to the embodiment described with reference to FIGS. 1 to 4, in the mold transformer 100, the tap cover can have a simple configuration, and at the substantially central portion of the circular plane portion on the primary mold coil side. Since it is fixed, there is no directionality in attaching the tap cover, and the attaching operation becomes easy. Further, since the tap cover is made of a light-transmitting material, the internal state can be seen through, and usability is improved.

なお、上記実施例では、固定手段としてビスを用いる構成としたが、本発明はこれに限定されず、他のものを用いてもよい。   In the above embodiment, the screw is used as the fixing means. However, the present invention is not limited to this, and other devices may be used.

本発明の実施例としてのモールド変圧器の構成例図である。It is a structural example figure of the mold transformer as an Example of this invention. 図１のモールド変圧器のタップ切換え部の構成図である。It is a block diagram of the tap switching part of the mold transformer of FIG. 図２のタップ切換え部の断面図である。It is sectional drawing of the tap switching part of FIG. モールド変圧器のタップ切換え部の他の構成例図である。It is another structural example figure of the tap switching part of a mold transformer. 従来技術としてのモールド変圧器のタップ切換え部の説明図である。It is explanatory drawing of the tap switching part of the mold transformer as a prior art.

符号の説明Explanation of symbols

１ａ、１ｂ、１ｃ…１次側モールドコイル、
１ａ１、１ｂ１、１ｃ１…コイル側面、
２ａ、２ｂ、２ｃ…２次側モールドコイル、
３…コア、
５ａ、５ｂ、５ｃ、５０ａ…タップカバー、
１２ａ、１２ｂ、１２ｃ…巻終り端側の１次コイル側端子、
１２１ａ、１２１ｂ、１２１ｃ…ビス、
１３ａ、１３ｂ、１３ｃ…タップ切換え用端子、
１４ａ、１４ｂ、１４ｃ…タップ切換え用接続バー、
１５ａ、１５ｂ、１５ｃ…端子、
１６…相間接続バー、
２０…変圧器金具、
２１ａ、２１ｂ、２１ｃ…２次側端子、
１００…モールド変圧器。 1a, 1b, 1c ... primary side molded coil,
1a 1 , 1b 1 , 1c 1 ... coil side surface,
2a, 2b, 2c ... secondary mold coil,
3 ... Core,
5a, 5b, 5c, 50a ... tap cover,
12a, 12b, 12c ... primary coil side terminal on the winding end side,
121a, 121b, 121c ... screws,
13a, 13b, 13c ... tap switching terminals,
14a, 14b, 14c ... connection bar for switching taps,
15a, 15b, 15c ... terminals,
16: Interphase connection bar,
20 ... Transformer bracket,
21a, 21b, 21c ... secondary side terminals,
100: Molded transformer.

Claims (6)

１次側コイルと２次側コイルが各々モールド樹脂によって筒状体とされたモールド変圧器であって、
コイル側面部に配され、上記１次側コイルの巻終り端が接続されたコイル側端子と、
上記コイル側面部に配され、コイル側端子と接続がオン状態またはオフ状態とされることにより、上記１次側コイルのタップ電圧を切換えるタップ切換え用端子と、
絶縁材で構成され、円形平面部を有し、該円形平面部で、上記コイル側端子と上記タップ切換え用端子とを覆うタップカバーと、
絶縁材で構成され、上記タップカバーを上記コイル側面部側に固定する固定手段と、
を備えたことを特徴とするモールド変圧器。 The primary side coil and the secondary side coil are each a molded transformer formed into a cylindrical body by a mold resin,
A coil side terminal disposed on the coil side surface and connected to the winding end of the primary side coil;
A tap switching terminal for switching the tap voltage of the primary coil by being arranged on the coil side surface and being turned on or off in connection with the coil side terminal;
A tap cover that is made of an insulating material and has a circular plane portion, and covers the coil side terminal and the tap switching terminal at the circular plane portion;
A fixing means that is made of an insulating material and fixes the tap cover to the side surface of the coil;
A molded transformer comprising: 上記タップカバーは、光透過性の材料で構成される請求項１に記載のモールド変圧器。   The mold transformer according to claim 1, wherein the tap cover is made of a light transmissive material. 上記固定手段は、上記タップカバーの円形平面部の略中央部を上記コイル側面部側に固定する構成である請求項１に記載のモールド変圧器。   The mold transformer according to claim 1, wherein the fixing means is configured to fix a substantially central portion of the circular flat surface portion of the tap cover to the coil side surface portion side. モールド変圧器用のタップカバーであって、
絶縁材で構成され、円形平面部を有し、該円形平面部で、１次側コイルの巻終り端が接続されたコイル側端子と、該１次側コイルのタップ電圧を切換えるタップ切換え用端子とを覆う構成とされていることを特徴とするタップカバー。 A tap cover for a molded transformer,
A coil-side terminal that is made of an insulating material and has a circular flat portion, to which the winding end of the primary coil is connected, and a tap switching terminal that switches the tap voltage of the primary coil. A tap cover characterized by being configured to cover. 光透過性の材料で構成される請求項４に記載のタップカバー。   The tap cover according to claim 4, which is made of a light transmissive material. 上記円形平面部はその略中央部に貫通孔を有する請求項４に記載のタップカバー。
The tap cover according to claim 4, wherein the circular flat portion has a through hole at a substantially central portion thereof.
JP2005333716A 2005-11-18 2005-11-18 Mold transformer and tap cover used therefor Active JP4611869B2 (en)

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KR101494599B1 (en) 2014-12-17 2015-02-24 산일전기 주식회사 Auto molded transformer for an electric-railroad power supply
KR101576214B1 (en) * 2014-12-17 2015-12-22 산일전기 주식회사 Winding assembly of auto molded transformer for an electric-railroad power supply

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KR102250890B1 (en) * 2021-03-11 2021-05-11 두원전력(주) Voltage regulation tap-changer

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KR101576214B1 (en) * 2014-12-17 2015-12-22 산일전기 주식회사 Winding assembly of auto molded transformer for an electric-railroad power supply

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