JP4359132B2 - Molded transformer - Google Patents

Molded transformer Download PDF

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JP4359132B2
JP4359132B2 JP2003410092A JP2003410092A JP4359132B2 JP 4359132 B2 JP4359132 B2 JP 4359132B2 JP 2003410092 A JP2003410092 A JP 2003410092A JP 2003410092 A JP2003410092 A JP 2003410092A JP 4359132 B2 JP4359132 B2 JP 4359132B2
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winding
tap
resin layer
transformer
coil
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JP2004128517A (en
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朋宏 海津
宏 筒井
敦 鈴木
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Hitachi Industrial Equipment Systems Co Ltd
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Hitachi Industrial Equipment Systems Co Ltd
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本発明は、内部にコイルを備えてタップ線を引き出し、電源電圧を所定の電圧に変換するモールド変圧器におけるタップ切替器に関する。   The present invention relates to a tap changer in a molded transformer that includes a coil inside, draws out a tap line, and converts a power supply voltage to a predetermined voltage.

モールド変圧器は、従来、例えば以下の特許文献1等に見られるようなロータリー式のタップ切替器を取り付けたものが知られている。また、従来、その前面にタップ端子を設けたものも既に知られている。   Conventionally, a mold transformer is known in which a rotary tap changer as shown in, for example, Patent Document 1 below is attached. Conventionally, a tap terminal provided on the front surface is already known.

特開平5−135961号公報Japanese Patent Laid-Open No. 5-135961

しかしながら、上述した従来技術では、未だ、以下のような問題点が指摘されていた。   However, in the above-described prior art, the following problems have been pointed out.

すなわち、上記従来技術である特許文献1により知られたロータリー式のタップ切替器では、各コイル脚毎にタップ切替操作が行われるため、誤接続の可能性があった。また、その前面にタップ端子を設けた上記従来技術になるモールド変圧器では、このタップ端子を設ける厚い樹脂層が形成されており、そのため、軽量化の妨げとなっていた。また、この厚い樹脂層は、内部に収納された巻線から発熱を外部に放熱する妨げともなっており、そのため、かかる変圧器を大形化させていた。さらには、上記の従来技術になる変圧器では、各コイル脚のコイル高さ方向における制作誤差等により、その接続導体の取付が困難になる場合も生じていた。   That is, in the rotary tap changer known from Patent Document 1 as the above-described prior art, a tap change operation is performed for each coil leg. Moreover, in the mold transformer according to the above-described prior art in which a tap terminal is provided on the front surface, a thick resin layer for providing the tap terminal is formed, which hinders weight reduction. In addition, this thick resin layer also hinders the heat generated from the windings housed inside to be radiated to the outside, and thus this transformer has been enlarged. Furthermore, in the above-described conventional transformer, it may be difficult to attach the connecting conductor due to production errors in the coil height direction of each coil leg.

そこで、本発明は、上記従来技術における問題点に鑑みてなされたものであり、特にそのタップ切替器の操作性を向上すると共に、その小型、軽量化を可能とし、もって、小型、軽量化が可能なモールド変圧器のタップ切替器を提供することをその目的とする。   Therefore, the present invention has been made in view of the above-described problems in the prior art, and particularly improves the operability of the tap changer and enables its miniaturization and weight reduction. It is an object to provide a tap switch for a mold transformer that is possible.

かかる上記の目的は、本発明によれば、巻線の周囲を絶縁性の樹脂層で覆い、該巻線を巻始め部から巻終り部まで巻装し、所定の巻回数より複数のタップ線を引き出し、前記樹脂層の前面部のタップ端子に接続してなるコイル脚を3個備えたモールド変圧器において、前記巻線の巻始め部は、前記樹脂層の前面部の上部に配置し、前記巻線の巻終り部及び前記タップ端子より構成されるタップ切替部は、前記樹脂層の前面部の前記巻線の巻始め部より下側に配置し、前記巻線の周囲を覆った絶縁性の樹脂層は、前記各コイル脚の樹脂層の前面部で、前記巻線の巻始め部と前記タップ切替部との間に、前記巻線の巻始め部又は前記タップ切替部の樹脂層よりも薄肉の切り欠き部を有し、前記各コイル脚の巻線の巻終り部同士を接続し、前記タップ端子を略V字状に配置したことを特徴とするモールド変圧器により達成される。
According to the present invention, according to the present invention, the periphery of the winding is covered with an insulating resin layer, the winding is wound from the winding start portion to the winding end portion, and a plurality of tap wires are formed from a predetermined number of turns. In the molded transformer including three coil legs connected to the tap terminal on the front portion of the resin layer, the winding start portion of the winding is disposed on the upper portion of the front portion of the resin layer, The tap switching portion composed of the winding end portion of the winding and the tap terminal is disposed below the winding start portion of the winding on the front surface portion of the resin layer, and covers the periphery of the winding. The resin layer is a front surface portion of the resin layer of each coil leg, and between the winding start portion of the winding and the tap switching portion, the winding start portion of the winding or the resin layer of the tap switching portion. It has a cut-out of thinner than connects the winding end portions of the windings of each coil leg, the touch Is achieved by a mold transformer, characterized in that a terminal in a substantially V-shape.

また、本発明によれば、前記したモールド変圧器のタップ切替器において、前記複数のコイル脚の各タップ端子間をフレキシブルな接続導体で接続した。   Further, according to the present invention, in the tap changer of the mold transformer described above, the tap terminals of the plurality of coil legs are connected by the flexible connection conductor.

以上からも明らかなように、本発明になるタップ切替器とこれを備えたモールド変圧器によれば、巻線前面の樹脂層を大幅に軽量化してモールド変圧器全体としての小型化、軽量化を図ることが可能となるという優れた効果を発揮する。また、本発明によれば、そのタップ切替器の操作性の向上を図ることも可能になる。   As is apparent from the above, according to the tap changer and the mold transformer provided with the tap switch according to the present invention, the resin layer on the front surface of the winding is significantly reduced in weight, thereby reducing the size and weight of the entire mold transformer. It exhibits an excellent effect that it is possible to achieve. Further, according to the present invention, it is possible to improve the operability of the tap changer.

以下、本発明の実施の形態について、添付の図面を参照しながら説明する。   Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

まず、図1には、本発明の一の実施の形態になるモールド変圧器の1つのコイル脚の斜視図が、図2には、上記モールド変圧器のコイル脚の断面図が、そして、図3には、上記モールド変圧器のコイル脚の正面図が示されている。なお、このコイル脚は、図示しないが、三相星形結線、あるいは、単相二脚に接続され、その各脚の巻き終わり同士が接続されてモールド変圧器となる。   First, FIG. 1 is a perspective view of one coil leg of a molded transformer according to an embodiment of the present invention, FIG. 2 is a sectional view of the coil leg of the molded transformer, and FIG. 3 is a front view of the coil leg of the molded transformer. Although not shown, this coil leg is connected to a three-phase star connection or a single-phase bipod, and the winding ends of each leg are connected to form a molded transformer.

かかるモールド変圧器のコイル脚では、図2にも示すように、巻線1を、その巻始め部7からその巻き終わりに巻装し、この巻線1から、タップ電圧に応じた所定の巻回数よりタップ線を2a〜2eを引き出し、これらをタップ切替部6のタップ端子3a〜3eに接続する。そして、この巻線1を取り囲んで絶縁性の樹脂によりモールド成形された樹脂層8は、添付の図1及び図3からも明らかなように、上記巻始め部7及び上記タップ端子3a〜3eが設けられた前面部の肉厚の樹脂層を除いた部分、すなわち、本実施の形態では、台形状の部分の樹脂層の厚さを薄く成形し、切り欠き部分9としている。   In the coil leg of such a molded transformer, as shown in FIG. 2, the winding 1 is wound from the winding start portion 7 to the winding end, and a predetermined winding corresponding to the tap voltage is wound from the winding 1. The tap lines 2a to 2e are drawn from the number of times, and these are connected to the tap terminals 3a to 3e of the tap switching unit 6. The resin layer 8 that surrounds the winding 1 and is molded with an insulating resin has the winding start portion 7 and the tap terminals 3a to 3e, as is apparent from FIGS. The portion excluding the thick resin layer on the front surface, that is, in this embodiment, the trapezoidal portion of the resin layer is thinly formed to form the cutout portion 9.

このように、上記モールド変圧器コイル脚のタップ端子3a〜3eの取付け部分であるタップ切替部6を除いた前面部分の樹脂層8の厚さを薄くし、もって、前面部分の一部に樹脂層の薄肉の切り欠き部分9を形成することにより、従来のモールド変圧器のコイル脚におけるタップ取付前面を厚肉の樹脂層としたものに比較して、その軽量化を図り、かつ、内部の巻線1からの発熱を外部に放熱する妨げになるのを防止することが可能になる。より具体的には、本発明の上記の構造により、約4%の小型化、軽量化が可能になった。   As described above, the thickness of the resin layer 8 on the front surface portion excluding the tap switching portion 6 that is the attachment portion of the tap terminals 3a to 3e of the molded transformer coil leg is reduced, and a resin is applied to a part of the front surface portion. By forming the thin notch portion 9 of the layer, the tap mounting front surface in the coil leg of the conventional molded transformer is reduced in weight compared to the thick resin layer, and the internal It is possible to prevent the heat generated from the winding 1 from being hindered from radiating to the outside. More specifically, the above-described structure of the present invention enables a reduction in size and weight of about 4%.

次に、本発明の第二の実施の形態になるモールド変圧器について、添付の図4を参照しながら説明する。   Next, a molded transformer according to a second embodiment of the present invention will be described with reference to FIG.

なお、この第二の実施の形態においても、上記第一の実施の形態と同様に、三相星形結線もしくは単相二脚に接続されるように各コイル脚の巻終わり同士を接続するモールド変圧器のコイル脚は、上記図2に示したと同様に、その巻線1を、その巻始め部7からその巻き終わりに巻装し、この巻線1から、タップ電圧に応じた所定の巻回数よりタップ線を2a〜2eを引き出し、これらをタップ端子3a〜3eに接続することは上記と同様である。   In the second embodiment, as in the first embodiment, a mold for connecting the winding ends of each coil leg so as to be connected to a three-phase star connection or a single-phase bipod. In the same manner as shown in FIG. 2, the coil leg of the transformer is wound around the winding 1 from the winding start portion 7 to the winding end, and from the winding 1 to a predetermined winding corresponding to the tap voltage. Drawing the tap lines 2a to 2e from the number of times and connecting them to the tap terminals 3a to 3e is the same as described above.

この時、この第二の実施の形態においては、図4に示すように、上記のタップ端子3a〜3eを水平方向及び高さ方向に一定間隔にて略「V」字状に配置し、そして、上記巻線1の前面の上記タップ線を2a〜2eを引き出した部分とは反対側、すなわち、図4では上側の樹脂層8を、図中に斜線部で示すような形状で薄肉部とし、もって、切り欠き部分9としている。   At this time, in the second embodiment, as shown in FIG. 4, the tap terminals 3a to 3e are arranged in a substantially "V" shape at regular intervals in the horizontal direction and the height direction, and The tap line on the front surface of the winding 1 is opposite to the part where the wires 2a to 2e are drawn, that is, the upper resin layer 8 in FIG. Therefore, a notch portion 9 is provided.

これによれば、やはり上記の第一の実施の形態と同様に、モールド変圧器におけるタップ切替器6である巻線1前面の樹脂層8の軽量化を図ることが可能になると共に、また、この巻線1からの放熱が良好となり、もって、モールド変圧器自体の小型化が可能になる。なお、上記のモールド変圧器は、各脚部4a〜4cとして、そのタップ端子(この例では、タップ端子3d)が板状の接続導体5により接続される。なお、この時、各コイル脚4a〜4cの高さ方向の製作誤差により上記接続導体5による接続が困難な場合には、上記板状の接続導体5に代えて、例えばケーブル等のフレキシブルな接続導体で接続することも可能である。   According to this, as in the first embodiment, it is possible to reduce the weight of the resin layer 8 on the front surface of the winding 1 that is the tap changer 6 in the molded transformer, and also, The heat radiation from the winding 1 becomes good, and thus the mold transformer itself can be miniaturized. In the above-described molded transformer, the tap terminals (in this example, the tap terminals 3d) are connected by the plate-like connection conductors 5 as the leg portions 4a to 4c. At this time, if it is difficult to connect the connecting conductor 5 due to a manufacturing error in the height direction of each of the coil legs 4a to 4c, a flexible connection such as a cable is used instead of the plate-like connecting conductor 5. It is also possible to connect with a conductor.

さらに、本発明の第三の実施の形態になるモールド変圧器のコイル脚について、添付の図5を参照しながら説明する。   Further, a coil leg of the molded transformer according to the third embodiment of the present invention will be described with reference to the attached FIG.

なお、この第三の実施の形態においても、上記第一の実施の形態と同様に、三相星形結線もしくは単相二脚に接続されるように各コイル脚の巻終わり同士を接続するモールド変圧器のコイル脚は、上記図2に示したと同様に、その巻線1を、その巻始め部7からその巻き終わりに巻装し、この巻線1から、タップ電圧に応じた所定の巻回数よりタップ線を2a〜2eを引き出し、これらをタップ端子3a〜3eに接続することは上記と同様である。   In the third embodiment, as in the first embodiment, a mold for connecting the winding ends of each coil leg so as to be connected to a three-phase star connection or a single-phase bipod. In the same manner as shown in FIG. 2, the coil leg of the transformer is wound around the winding 1 from the winding start portion 7 to the winding end, and from the winding 1 to a predetermined winding corresponding to the tap voltage. Drawing the tap lines 2a to 2e from the number of times and connecting them to the tap terminals 3a to 3e is the same as described above.

そして、この第三の実施の形態においては、図5に示すように、上記のタップ端子3a〜3eを高さ方向に一定間隔に一直線字状に配置し、そして、上記巻線1の前面の上記タップ線を2a〜2eを引き出した部分とは反対側、すなわち、図5では右側及び上側の樹脂層8を、図中に斜線部で示すような形状で薄肉部とし、もって、切り欠き部分9としたものである。   In the third embodiment, as shown in FIG. 5, the tap terminals 3a to 3e are arranged in a straight line at a constant interval in the height direction, and the front surface of the winding 1 is arranged. On the opposite side of the portion from which the tap wires 2a to 2e are drawn out, that is, the right and upper resin layers 8 in FIG. 5 are formed into thin portions with shapes shown by hatched portions in the drawing, thereby having cutout portions. Nine.

そして、これによれば、やはり上記の第一の実施の形態と同様に、モールド変圧器におけるタップ切替器6である巻線1前面の樹脂層8の軽量化を図ることが可能になると共に、また、この巻線1からの放熱が良好となり、もって、モールド変圧器自体の小型化が可能になる。なお、このモールド変圧器でも、各脚部としてタップ端子を接続導体により接続する場合、上記板状の接続導体5により、あるいは、その接続が困難な場合には、これに代えてケーブル等のフレキシブルな接続導体で接続することも可能であることは同様である。   And according to this, it is possible to reduce the weight of the resin layer 8 on the front surface of the winding 1 that is the tap changer 6 in the molded transformer, as in the first embodiment. In addition, the heat radiation from the winding 1 is good, and the mold transformer itself can be downsized. Even in this molded transformer, when the tap terminal is connected as a leg by a connecting conductor, the plate-like connecting conductor 5 or a flexible cable such as a cable is used instead if the connection is difficult. It is also possible to connect with a simple connection conductor.

本発明の第一の実施の形態になるモールド変圧器のコイル脚の構造を示す斜視図である。It is a perspective view which shows the structure of the coil leg of the mold transformer which becomes 1st embodiment of this invention. 上記第一の実施の形態になるモールド変圧器コイル脚の断面図である。It is sectional drawing of the mold transformer coil leg which becomes said 1st embodiment. 上記第一の実施の形態になるモールド変圧器コイル脚の正面図である。It is a front view of the mold transformer coil leg which becomes said 1st embodiment. 本発明の第二の実施の形態になるモールド変圧器のコイルの構造を示す正面図である。It is a front view which shows the structure of the coil of the mold transformer which becomes 2nd embodiment of this invention. 本発明の第三の実施の形態になるモールド変圧器のコイルのコイル脚の構造を示す正面図である。It is a front view which shows the structure of the coil leg of the coil of the mold transformer which becomes 3rd embodiment of this invention.

符号の説明Explanation of symbols

1 巻線
2a〜2e タップ線
3a〜3e タップ端子
4a〜4c コイル脚
5 接続導体
6 タップ切替部
7 巻始め部
8 樹脂層
9 切り欠き部。
DESCRIPTION OF SYMBOLS 1 Winding | winding 2a-2e Tap wire 3a-3e Tap terminal 4a-4c Coil leg 5 Connection conductor 6 Tap switching part 7 Winding start part 8 Resin layer 9 Notch part.

Claims (1)

巻線の周囲を絶縁性の樹脂層で覆い、該巻線を巻始め部から巻終り部まで巻装し、所定の巻回数より複数のタップ線を引き出し、前記樹脂層の前面部のタップ端子に接続してなるコイル脚を3個備えたモールド変圧器において、
前記巻線の巻始め部は、前記樹脂層の前面部の上部に配置し、
前記巻線の巻終り部及び前記タップ端子より構成されるタップ切替部は、前記樹脂層の前面部の前記巻線の巻始め部より下側に配置し、
前記巻線の周囲を覆った絶縁性の樹脂層は、前記各コイル脚の樹脂層の前面部で、前記巻線の巻始め部と前記タップ切替部との間に、前記巻線の巻始め部又は前記タップ切替部の樹脂層よりも薄肉の切り欠き部を有し、
前記各コイル脚の巻線の巻終り部同士を接続し
前記タップ端子を略V字状に配置した
ことを特徴とするモールド変圧器。
Cover the periphery of the winding with an insulating resin layer, wind the winding from the winding start portion to the winding end portion, draw out a plurality of tap wires from a predetermined number of turns, and tap terminals on the front portion of the resin layer In a molded transformer with three coil legs connected to
The winding start portion of the winding is disposed at the upper part of the front portion of the resin layer,
The tap switching portion constituted by the winding end portion of the winding and the tap terminal is disposed below the winding start portion of the winding on the front surface portion of the resin layer,
The insulating resin layer covering the periphery of the winding is a front portion of the resin layer of each coil leg, and between the winding start portion of the winding and the tap switching portion, the winding start of the winding. Or a notch portion thinner than the resin layer of the tap switching portion,
Connecting the end portions of the windings of the coil legs ,
The molded transformer, wherein the tap terminals are arranged in a substantially V shape .
JP2003410092A 2003-12-09 2003-12-09 Molded transformer Expired - Lifetime JP4359132B2 (en)

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JP00447898A Division JP3665198B2 (en) 1998-01-13 1998-01-13 Molded transformer

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JP2006141279A Division JP2006261693A (en) 2006-05-22 2006-05-22 Mold transformer

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JP4359132B2 true JP4359132B2 (en) 2009-11-04

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JP7311877B2 (en) * 2019-02-22 2023-07-20 北陸電機製造株式会社 Transformer with tap changer

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