JPH11204350A - Molded transformer and its tap changer - Google Patents
Molded transformer and its tap changerInfo
- Publication number
- JPH11204350A JPH11204350A JP447898A JP447898A JPH11204350A JP H11204350 A JPH11204350 A JP H11204350A JP 447898 A JP447898 A JP 447898A JP 447898 A JP447898 A JP 447898A JP H11204350 A JPH11204350 A JP H11204350A
- Authority
- JP
- Japan
- Prior art keywords
- tap
- resin layer
- winding
- molded transformer
- terminals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】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関し、特に、かかるモールド変圧
器におけるタップ切替器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded transformer which has a coil therein, draws out a tap wire, and converts a power supply voltage to a predetermined voltage, and more particularly to a tap changer in such a molded transformer.
【０００２】[0002]
【従来の技術】モールド変圧器は、従来、例えば特開平
５−１３５９６１号公報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。2. Description of the Related Art Conventionally, a molded transformer equipped with a rotary tap changer as disclosed in, for example, Japanese Patent Application Laid-Open No. 5-1351961 is known. Conventionally, a device having a front surface provided with a tap terminal is already known.
【０００３】[0003]
【発明が解決しようとする課題】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-mentioned prior art, the following problems have been pointed out.
【０００４】すなわち、上記従来技術である特開平５−
１３５９６１号公報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, the above-mentioned prior art disclosed in Japanese Patent Laid-Open No.
In the rotary tap changer known from Japanese Patent No. 135961, the tap change operation is performed for each coil leg, so that there is a possibility of erroneous connection. Further, in the above-described conventional molded transformer having a tap terminal provided on the front surface thereof, a thick resin layer for providing the tap terminal is formed, which hinders weight reduction. In addition, the thick resin layer hinders heat generation from the winding housed inside to the outside, so that such a transformer has been increased in size. Further, in the transformer according to the above-described conventional technique, it may be difficult to attach the connection conductor due to a production error or the like in a coil height direction of each coil leg.
【０００５】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
とそのタップ切替器を提供することをその目的とする。Accordingly, the present invention has been made in view of the above-mentioned problems in the prior art, and in particular, it has improved the operability of the tap changer and made it possible to make the tap switch smaller and lighter. It is an object of the present invention to provide a molded transformer that can be reduced in weight and a tap changer therefor.
【０００６】[0006]
【課題を解決するための手段】かかる上記の目的は、本
発明によれば、巻線の周囲を樹脂層で覆い、前記巻線の
巻終わりからタップ電圧に応じて所定の巻回数より複数
のタップ線を引き出し、かつ、前記巻線の周囲を覆う前
記樹脂層の前面部に複数のタップ端子を配置し、前記複
数のタップ線を前記樹脂層前面部の複数のタップ端子に
接続してなるコイル脚を備えたモールド変圧器におい
て、前記コイル脚の複数のタップ端子を配置した前記樹
脂層の前面部の一部に、肉薄の樹脂層による切り欠き部
を形成したモールド変圧器により達成される。According to the present invention, there is provided, in accordance with the present invention, a method in which the periphery of a winding is covered with a resin layer, and a plurality of windings are provided from a predetermined number of turns in accordance with a tap voltage from the end of the winding. A plurality of tap terminals are arranged on a front surface of the resin layer covering the periphery of the winding, and a plurality of tap terminals are connected to the plurality of tap terminals on the front surface of the resin layer. In a molded transformer having a coil leg, the present invention is achieved by a molded transformer in which a cutout portion made of a thin resin layer is formed in a part of a front surface of the resin layer in which a plurality of tap terminals of the coil leg are arranged. .
【０００７】また、本発明によれば、前記したモールド
変圧器において、前記肉薄の樹脂層による切り欠き部
は、前記前面部において前記複数のタップ端子を配置し
た部分とは異なる部分に形成されている。Further, according to the present invention, in the above-described molded transformer, the cutout portion made of the thin resin layer is formed in a portion of the front surface portion different from a portion where the plurality of tap terminals are arranged. I have.
【０００８】また、本発明によれば、かかる上記の目的
を達成するため、巻線の周囲を樹脂層で覆い、前記巻線
の巻終わりからタップ電圧に応じて所定の巻回数より複
数のタップ線を引き出してなるコイル脚を複数備えたモ
ールド変圧器において、前記巻線の周囲を覆う前記樹脂
層の前面部に複数のタップ端子を配置し、前記コイル脚
の複数のタップ線を前記樹脂層前面部の複数のタップ端
子に接続してなるモールド変圧器のタップ切替器であっ
て、前記複数のタップ端子を配置した前記樹脂層の前面
部の一部に肉薄の樹脂層による切り欠き部を形成したモ
ールド変圧器のタップ切替器が提供される。Further, according to the present invention, in order to achieve the above object, the periphery of the winding is covered with a resin layer, and a plurality of taps are formed from a predetermined number of turns in accordance with a tap voltage from the end of the winding. In a molded transformer having a plurality of coil legs formed by drawing wires, a plurality of tap terminals are arranged on a front portion of the resin layer covering the periphery of the winding, and a plurality of tap wires of the coil legs are connected to the resin layer. A tap changer for a molded transformer connected to a plurality of tap terminals on a front portion, wherein a notch formed by a thin resin layer is provided on a part of a front portion of the resin layer on which the plurality of tap terminals are arranged. A molded mold transformer tap changer is provided.
【０００９】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 above-described molded transformer, the tap terminals of the plurality of coil legs are connected by a flexible connection conductor.
【００１０】[0010]
【発明の実施の形態】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。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。Embodiments of the present invention will be described below with reference to the accompanying drawings. First, FIG. 1 shows one embodiment of a mold transformer according to one embodiment of the present invention.
FIG. 2 is a perspective view of one coil leg, FIG. 2 is a cross-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. In addition,
Although not shown, the coil legs are connected to a three-phase star connection or a single-phase two-leg, and the ends of the legs are connected to each other to form a molded transformer.
【００１１】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 the winding 1 is adapted to the tap voltage according to the tap voltage. From the predetermined number of turns, tap wires 2a to 2e are drawn out and connected to the tap terminals 3a to 3e of the tap switching unit 6. As apparent from the attached FIGS. 1 and 3, the resin layer 8 surrounding the winding 1 and molded with an insulating resin includes the winding start portion 7 and the tap terminals 3a to 3e. In the present embodiment, the thickness of the trapezoidal portion of the resin layer excluding the thick resin layer of the provided front portion is reduced to form a cutout portion 9.
【００１２】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 in the front portion excluding the tap switching portion 6, which is the portion where the tap terminals 3a to 3e of the molded transformer coil legs are attached, is reduced. By forming a thin cutout portion 9 of the resin layer in the portion, the weight of the coil leg of the conventional mold transformer is reduced as compared with the case where the tap mounting front surface is made of a thick resin layer, and In addition, it is possible to prevent heat generated from the internal winding 1 from being hindered from being radiated to the outside. More specifically, the above structure of the present invention has enabled a reduction in size and weight of about 4%.
【００１３】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 mold transformer according to a second embodiment of the present invention will be described with reference to FIG.
【００１４】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。[0014] In the second embodiment,
As in the first embodiment, the coil legs of the molded transformer that connect the winding ends of the coil legs to be connected to the three-phase star connection or the single-phase bipod are shown in FIG. Similarly, the winding 1 is wound from the winding start portion 7 to the winding end, and tap wires 2a to 2e are drawn from the winding 1 from a predetermined number of turns corresponding to the tap voltage. Is connected to the tap terminals 3a to 3e in the same manner as described above.
【００１５】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 a horizontal direction and a height direction. Then, the tap wire on the front surface of the winding 1 is connected to 2a.
4, the resin layer 8 on the upper side in FIG. 4 is formed into a thin portion in a shape shown by a hatched portion in FIG.
【００１６】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３
ｄ）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, similarly to the first embodiment, the tap changer 6 in the molded transformer is provided.
As a result, it is possible to reduce the weight of the resin layer 8 on the front surface of the winding 1, and to improve the heat radiation from the winding 1, thereby making it possible to reduce the size of the molded transformer itself. In addition, the above-mentioned mold transformer is provided with the legs 4a to 4c.
As the tap terminal (in this example, tap terminal 3
d) are connected by a plate-shaped connection conductor 5. At this time, if the connection by the connection conductor 5 is difficult 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-shaped connection conductor 5. It is also possible to connect with a conductor.
【００１７】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 a molded transformer according to a third embodiment of the present invention will be described with reference to FIG.
【００１８】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, also,
As in the first embodiment, the coil legs of the molded transformer that connect the winding ends of the coil legs to be connected to the three-phase star connection or the single-phase bipod are shown in FIG. Similarly, the winding 1 is wound from the winding start portion 7 to the winding end, and tap wires 2a to 2e are drawn from the winding 1 from a predetermined number of turns corresponding to the tap voltage. Is connected to the tap terminals 3a to 3e in the same manner as described above.
【００１９】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 regular intervals in the height direction. On the other side of the front side of the tap line from the portion where 2a to 2e are drawn out, that is, in FIG. 5, the right and upper resin layers 8 are formed into thin portions in the shape shown by oblique lines in the figure, The notch 9 is formed.
【００２０】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。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 which is the tap changer 6 in the molded transformer. In addition, the heat radiation from the windings 1 is improved, so that the size of the molded transformer itself can be reduced. In this molded transformer, when the tap terminals are connected by the connection conductors as the respective leg portions, the plate-shaped connection conductors 5 are used, or when the connection is difficult, a flexible cable or the like is used instead. Similarly, it is possible to connect with a simple connection conductor.
【００２１】[0021]
【発明の効果】以上の詳細な説明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 detailed description, according to the tap changer according to the present invention and the mold transformer provided with the same, the resin layer on the front surface of the winding is greatly reduced in weight and the mold transformer is reduced. An excellent effect that it is possible to reduce the size and weight of the container as a whole is exhibited. Further, according to the present invention, it is possible to improve the operability of the tap changer.
【図１】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。FIG. 1 is a perspective view showing a structure of a coil leg of a molded transformer according to a first embodiment of the present invention.
【図２】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。FIG. 2 is a sectional view of a molded transformer coil leg according to the first embodiment.
【図３】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。FIG. 3 is a front view of a molded transformer coil leg according to the first embodiment.
【図４】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。FIG. 4 is a front view showing a structure of a coil of a molded transformer according to a second embodiment of the present invention.
【図５】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。FIG. 5 is a front view showing a structure of a coil leg of a coil of a molded transformer according to a third embodiment of the present invention.
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 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 (4)
巻終わりからタップ電圧に応じて所定の巻回数より複数
のタップ線を引き出し、かつ、前記巻線の周囲を覆う前
記樹脂層の前面部に複数のタップ端子を配置し、前記複
数のタップ線を前記樹脂層前面部の複数のタップ端子に
接続してなるコイル脚を備えたモールド変圧器におい
て、前記コイル脚の複数のタップ端子を配置した前記樹
脂層の前面部の一部に、肉薄の樹脂層による切り欠き部
を形成したことを特徴とするモールド変圧器。1. A resin layer for covering the periphery of a winding with a resin layer, extracting a plurality of tap wires from a predetermined number of turns according to a tap voltage from the end of the winding, and covering the periphery of the winding. A plurality of tap terminals are arranged on a front surface of the layer, and a molded transformer having a coil leg formed by connecting the plurality of tap wires to the plurality of tap terminals on the front surface of the resin layer. A molded transformer, wherein a cutout portion made of a thin resin layer is formed in a part of the front surface of the resin layer where the tap terminals are arranged.
において、前記肉薄の樹脂層による切り欠き部は、前記
前面部において前記複数のタップ端子を配置した部分と
は異なる部分に形成されたことを特徴とするモールド変
圧器。2. The molded transformer according to claim 1, wherein the cutout portion formed by the thin resin layer is formed in a portion of the front surface portion different from a portion where the plurality of tap terminals are arranged. A molded transformer.
巻終わりからタップ電圧に応じて所定の巻回数より複数
のタップ線を引き出してなるコイル脚を複数備えたモー
ルド変圧器において、前記巻線の周囲を覆う前記樹脂層
の前面部に複数のタップ端子を配置し、前記コイル脚の
複数のタップ線を前記樹脂層前面部の複数のタップ端子
に接続してなるモールド変圧器のタップ切替器であっ
て、前記複数のタップ端子を配置した前記樹脂層の前面
部の一部に肉薄の樹脂層による切り欠き部を形成したこ
とを特徴とするモールド変圧器のタップ切替器。3. A molded transformer comprising a plurality of coil legs each of which is formed by covering a periphery of a winding with a resin layer and extracting a plurality of tap wires from a predetermined number of turns in accordance with a tap voltage from the end of the winding. A molded transformer comprising a plurality of tap terminals arranged on a front surface of the resin layer covering the periphery of the winding, and a plurality of tap wires of the coil leg connected to a plurality of tap terminals on the front surface of the resin layer. The tap changer for a molded transformer, wherein a cutout portion made of a thin resin layer is formed in a part of the front surface of the resin layer in which the plurality of tap terminals are arranged.
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ことを特
徴とするモールド変圧器のタップ切替器。4. The tap changer for a molded transformer according to claim 3, wherein the tap terminals of the plurality of coil legs are connected by a flexible connection conductor. vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00447898A JP3665198B2 (en) | 1998-01-13 | 1998-01-13 | Molded transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00447898A JP3665198B2 (en) | 1998-01-13 | 1998-01-13 | Molded transformer |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003410092A Division JP4359132B2 (en) | 2003-12-09 | 2003-12-09 | Molded transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11204350A true JPH11204350A (en) | 1999-07-30 |
| JP3665198B2 JP3665198B2 (en) | 2005-06-29 |
Family
ID=11585228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00447898A Expired - Lifetime JP3665198B2 (en) | 1998-01-13 | 1998-01-13 | Molded transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3665198B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007005574A (en) * | 2005-06-24 | 2007-01-11 | Aichi Electric Co Ltd | Tap lead drawing mechanism of automatic voltage regulator |
| JP2007088347A (en) * | 2005-09-26 | 2007-04-05 | Hitachi Industrial Equipment Systems Co Ltd | Molded coil and molded transformer using it |
| JP2011139090A (en) * | 2011-03-04 | 2011-07-14 | Hitachi Industrial Equipment Systems Co Ltd | Molded transformer |
-
1998
- 1998-01-13 JP JP00447898A patent/JP3665198B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007005574A (en) * | 2005-06-24 | 2007-01-11 | Aichi Electric Co Ltd | Tap lead drawing mechanism of automatic voltage regulator |
| JP4702834B2 (en) * | 2005-06-24 | 2011-06-15 | 愛知電機株式会社 | Tap lead drawer structure of automatic voltage regulator |
| JP2007088347A (en) * | 2005-09-26 | 2007-04-05 | Hitachi Industrial Equipment Systems Co Ltd | Molded coil and molded transformer using it |
| JP4744254B2 (en) * | 2005-09-26 | 2011-08-10 | 株式会社日立産機システム | Molded transformer |
| JP2011139090A (en) * | 2011-03-04 | 2011-07-14 | Hitachi Industrial Equipment Systems Co Ltd | Molded transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3665198B2 (en) | 2005-06-29 |
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