JP2978525B2 - Transformer - Google Patents

Transformer

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Publication number
JP2978525B2
JP2978525B2 JP2089153A JP8915390A JP2978525B2 JP 2978525 B2 JP2978525 B2 JP 2978525B2 JP 2089153 A JP2089153 A JP 2089153A JP 8915390 A JP8915390 A JP 8915390A JP 2978525 B2 JP2978525 B2 JP 2978525B2
Authority
JP
Japan
Prior art keywords
transformer
input
side winding
annular
legs
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.)
Expired - Fee Related
Application number
JP2089153A
Other languages
Japanese (ja)
Other versions
JPH03288413A (en
Inventor
宏和 鈴木
広人 佐藤
保幸 西田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Electric Power Company Holdings Inc
Original Assignee
Tokyo Electric Power Co Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tokyo Electric Power Co Inc filed Critical Tokyo Electric Power Co Inc
Priority to JP2089153A priority Critical patent/JP2978525B2/en
Publication of JPH03288413A publication Critical patent/JPH03288413A/en
Application granted granted Critical
Publication of JP2978525B2 publication Critical patent/JP2978525B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は直流を単相交流に変換する例えば二相インバ
ータの出力を入力して三相交流出力を得る変成器に関す
る。
Description: TECHNICAL FIELD The present invention relates to a transformer for converting a direct current into a single-phase alternating current, for example, by inputting the output of a two-phase inverter to obtain a three-phase alternating current output.

(従来の技術) 二相インバータと組合わせて使用される変成器にあっ
ては、損失を少なくして単相方形波から三相交流出力が
得られるものが要求される。
(Prior Art) In a transformer used in combination with a two-phase inverter, a transformer capable of obtaining a three-phase AC output from a single-phase square wave with a reduced loss is required.

従来、この種の変成器としては、第7図に示すように
断面矩形状の3個の環状鉄心1を適宜の間隔を存して横
一列に配設し、その各環状鉄心1の一方の脚部に入力巻
線2をそれぞれ巻装すると共にこれらをオープンΔ結線
して単相交流が加えられる入力端子tA,tBに接続し、ま
た各環状鉄心1の他方の脚部に出力側巻線3をそれぞれ
巻装すると共にこれらをY結線して三相交流を出力する
出力端子tR,tS,tTに接続するように構成したものがあ
る。
Conventionally, as this type of transformer, as shown in FIG. 7, three annular cores 1 each having a rectangular cross section are arranged in a horizontal line at appropriate intervals, and one of the annular cores 1 is provided. The input windings 2 are wound around the legs, respectively, and are connected in an open Δ connection to input terminals t A and t B to which a single-phase alternating current is applied. There is a configuration in which the windings 3 are respectively wound and connected in a Y-connection to output terminals t R , t S , and t T for outputting three-phase AC.

(発明が解決しようとする課題) しかし、このような構成の変成器においては、入力側
巻線2を3個の環状鉄心1にそれぞれ独立させて巻装し
ているため、入力側巻線全体が長くなり、巻線抵抗によ
る銅損が大きいという欠点がある。
(Problems to be Solved by the Invention) However, in the transformer having such a configuration, since the input-side winding 2 is wound independently on the three annular cores 1, the entire input-side winding is formed. And the copper loss due to winding resistance is large.

本発明は3個の環状鉄心の配置構成を改良して入力側
巻線の長さを大幅に短縮することにより、巻線抵抗によ
る銅損を低減させることができる変成器を提供すること
を目的とする。
An object of the present invention is to provide a transformer capable of reducing the copper loss due to winding resistance by improving the arrangement of three annular cores to greatly reduce the length of the input side winding. And

(課題を解決するための手段) 本発明は上記の目的を達成するため、3個の環状鉄心
の一方の脚部に単相交流により励磁される入力側巻線を
巻装し、各環状鉄心の他方の脚部に出力側巻線を巻装し
て三相交流出力を得る変成器において、前記各環状鉄心
をその一方の脚部を近接集合して配置すると共にこれら
の脚部を包括して入力側巻線を巻装する構成としたもの
である。
(Means for Solving the Problems) According to the present invention, in order to achieve the above object, an input-side winding excited by a single-phase alternating current is wound around one leg of three annular cores, and each annular core is wound. In the transformer in which the output side winding is wound around the other leg to obtain a three-phase AC output, each of the annular cores is arranged such that one of the legs is closely assembled, and these legs are included. Thus, the input side winding is wound.

(作用) このような構成の変成器にあっては、一括して配置さ
れた3個の環状鉄心の一方の脚部に入力側巻線を一体的
に巻装することにより、個々の鉄心脚にそれぞれ入力側
巻線を巻装した場合に比較して入力側巻線全体の長さを
大幅に短縮することが可能となり、巻線抵抗による銅損
を減少させることができる。
(Operation) In the transformer having such a configuration, the input side winding is integrally wound around one leg of the three annular cores arranged collectively, so that the individual core legs are formed. The length of the entire input-side winding can be greatly reduced as compared with the case where the input-side winding is wound, respectively, and copper loss due to winding resistance can be reduced.

(実施例) 以下本発明の一実施例を図面を参照して説明する。Embodiment An embodiment of the present invention will be described below with reference to the drawings.

第1図は本発明による変成器の構成例を示す断面図で
ある。第1図において、11a,11b,11cはアモルファス鉄
心からなる断面矩形状の3個の環状鉄心で、これら各環
状鉄心11a,11b,11cはその一方の脚部のコーナを突合せ
る如く、且つ各脚部相互間がほぼ等角度となるように配
置される。このように配置された3個の環状鉄心11a,11
b,11cの一方の各脚部のコーナ突合部を中心に、入力側
巻線12が一体的に巻装されると共にオープンΔ結線して
単相交流が加えられる入力端子tA,tBに接続される。ま
た、環状鉄心11a,11b,11cの他方の脚部には従来同様に
出力側巻線13R,13S,13Tがそれぞれ巻装されると共にY
結線して三相交流を出力する出力端子tR,tS,tTに接続さ
れている。
FIG. 1 is a sectional view showing a configuration example of a transformer according to the present invention. In FIG. 1, reference numerals 11a, 11b, and 11c denote three annular iron cores each having a rectangular cross section made of an amorphous iron core. The legs are arranged so that they are substantially equiangular. The three annular cores 11a, 11 thus arranged
The input side windings 12 are integrally wound around the corner abutting portion of each leg of one of the b and 11c, and the input terminals t A and t B to which a single-phase alternating current is applied by open Δ connection. Connected. Output side windings 13 R , 13 S , and 13 T are wound around the other leg portions of the annular cores 11 a, 11 b, and 11 c, respectively, as in the related art.
They are connected to output terminals t R , t S , and t T that output a three-phase alternating current.

このような構成の変成器とすれば、3個の環状鉄心11
a,11b,11cがその一方の脚部のコーナを突合せる如く、
且つ各脚部相互間がほぼ等角度となるように配置され、
このコーナ突合部を中心に一方の脚部に入力側巻線12が
一体的に巻装されることにより、従来に比較して入力側
巻線12全体の長さを大幅に短縮することができる。ここ
で、その一例として同一断面矩形状の環状鉄心を用いた
従来の変成器と本実施例の変成器とを対比して見ると次
の通りである。
With a transformer having such a configuration, three annular cores 11
As a, 11b, 11c butt the corner of one leg,
In addition, the legs are arranged so that they are substantially equiangular,
Since the input winding 12 is integrally wound around one of the legs around the corner abutting portion, the entire length of the input winding 12 can be significantly reduced as compared with the related art. . Here, as an example, a conventional transformer using an annular core having the same cross-sectional rectangular shape and the transformer of the present embodiment are compared as follows.

従来の変成器の場合には、第2図に示すように断面矩
形状の厚み方向の長さをa、幅方向の長さをbとする
と、3個の環状鉄心1の一方の脚部にそれぞれ巻装され
る入力側巻線の全長は、 ≒3×(2a+2b)=12a となる。
In the case of the conventional transformer, as shown in FIG. 2, when the length in the thickness direction of the rectangular cross section is a, and the length in the width direction is b, one of the three annular cores 1 The total length 1 of the input-side windings wound respectively is 1 ≒ 3 × (2a + 2b) = 12a.

これに対して本実施例の変成器の場合には、第3図に
示すように3個の環状鉄心11a,11b,11cの一方の脚部の
コーナの突合部を中心とする各脚部相互間のなす角度を
θ12とすると、入力側巻線全体の長さは、 となる。
On the other hand, in the case of the transformer of this embodiment, as shown in FIG. 3, each of the three annular cores 11a, 11b, and 11c has one leg centered on the abutting portion of the corner. Assuming that the angles between θ 1 , θ 2 , θ 3 are as follows, the total length 2 of the input side winding is Becomes

ここで、例えば a=b,θ=θ=θ=30゜とすると、 ≒12a ≒6a+3×0.26a=6.78a となり、 2/≒0.56 となる。Here, for example, a = b, when θ 1 = θ 2 = θ 3 = 30 to °, 1 ≒ 12a 2 ≒ 6a + 3 × 0.26a = 6.78a , and becomes a 2/1 ≒ 0.56.

従って、本実施例の変成器における入力側巻線の全長
は従来のそれと比較して約半分となり、大幅に入力側巻
線の長さを短縮することができる。これにより、巻線抵
抗による銅損を低減させることが可能となる。
Therefore, the total length of the input side winding in the transformer of the present embodiment is about half that of the conventional one, and the length of the input side winding can be greatly reduced. This makes it possible to reduce copper loss due to winding resistance.

一方、本実施例においては環状鉄心としてアモルファ
ス鉄心を使用しているので、渦電流損が低減し、上記銅
損と合せて銅損も低減させることができ、変成器として
の効率を向上させることができる。
On the other hand, in the present embodiment, since the amorphous core is used as the annular core, the eddy current loss is reduced, the copper loss can be reduced together with the copper loss, and the efficiency as a transformer can be improved. Can be.

上記実施例では環状鉄心11a,11b,11cはその一方の脚
部のコーナを突合せる如く、且つ各脚部相互間がほぼ等
角度となるように一括して配置し、これらの脚部に入力
側巻線12を一体的に巻装する場合について述べたが、各
環状鉄心の配置としては第4図乃至第6図に示すような
構成としても前述同様に実施することができる。即ち、
第4図は3個の環状鉄心11a,11b,11cの一方の脚部を中
心部にΔ状の空間部が形成されるように突合せてY状に
配置する構成としたものである。また、第5図は3個の
環状鉄心11a,11b,11cの一方の脚部を逆Tの字形に突合
せて配置する構成したものである。さらに、第6図は3
個の環状鉄心11a,11b,11cのうち、その一つの環状鉄心1
1aの一方の脚部の両側面に他の二つの環状鉄心11b,11c
の一方の脚部の一側面を環状鉄心11aとは逆方向に向け
て突合わせて配置する構成としたものである。
In the above embodiment, the annular cores 11a, 11b, and 11c are collectively arranged so that the corners of one of the legs abut each other and the legs are substantially at the same angle, and input to these legs. Although the case where the side windings 12 are integrally wound has been described, the arrangement of the respective annular cores may be configured as shown in FIGS. 4 to 6 and implemented in the same manner as described above. That is,
FIG. 4 shows a configuration in which one of the three iron cores 11a, 11b, 11c is arranged in a Y-shape such that a Δ-shaped space is formed at the center thereof. FIG. 5 shows a configuration in which one leg of the three annular iron cores 11a, 11b, 11c is arranged in an inverted T-shape. In addition, FIG.
One of the annular cores 11a, 11b, 11c
The other two annular iron cores 11b and 11c on both sides of one leg of 1a
One of the legs is arranged so as to abut against the annular core 11a in the opposite direction.

上記何れの配置構成としても一括して配置された一方
の脚部に入力側巻線を一体的に巻装することにより、程
度の差はあっても入力側巻線全体の長さを従来のそれに
比べて短縮することができ、巻線抵抗による銅損を低減
できる。
In any of the above arrangements, the input-side winding is integrally wound around one of the legs arranged collectively, so that the entire length of the input-side winding can be reduced even if the degree is different. The length can be shortened in comparison with the above, and copper loss due to winding resistance can be reduced.

(発明の効果) 以上述べたように本発明によれば、近接集合して配置
された3個の環状鉄心の一方の脚部を包括して入力側巻
線を巻装するようにしたので、入力側巻線の全長を大幅
に短縮することができ、巻線抵抗による銅損を低減させ
ることができる変成器を提供できる。
(Effect of the Invention) As described above, according to the present invention, the input-side winding is wound around one leg of the three annular cores arranged in close proximity. A transformer can be provided in which the total length of the input side winding can be significantly reduced and copper loss due to winding resistance can be reduced.

【図面の簡単な説明】[Brief description of the drawings]

第1図は本発明による変成器の一実施例を示す断面図、
第2図および第3図は従来の変成器と同実施例の変成器
とを具体的に比較して説明するための図、第4図乃至第
6図は本発明のそれぞれ異なる他の実施例における環状
鉄心の配置構成を示す断面図、第7図は従来の変成器の
構成を説明するための断面図である。 11a,11b,11c……環状鉄心、12……入力側巻線、13……
出力側巻線。
FIG. 1 is a sectional view showing an embodiment of a transformer according to the present invention,
FIGS. 2 and 3 are diagrams for specifically comparing and explaining a conventional transformer and the transformer of the embodiment. FIGS. 4 to 6 are diagrams showing different embodiments of the present invention. And FIG. 7 is a cross-sectional view for explaining the configuration of a conventional transformer. 11a, 11b, 11c… Annular core, 12… Input side winding, 13…
Output side winding.

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6,DB名) H01F 30/12 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) H01F 30/12

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】3個の環状鉄心の一方の脚部に単相交流に
より励磁される入力側巻線を巻装し、各環状鉄心の他方
の脚部に出力側巻線を巻装して三相交流出力を得る変成
器において、前記各環状鉄心をその一方の脚部を近接集
合して配置すると共にこれらの脚部を包括して入力側巻
線を巻装する構成としたことを特徴とする変成器。
An input-side winding excited by a single-phase alternating current is wound around one leg of three annular cores, and an output-side winding is wound around the other leg of each annular core. In the transformer for obtaining a three-phase AC output, each of the annular cores is arranged such that one of its legs is closely arranged and the input side winding is wound around these legs. And transformer.
JP2089153A 1990-04-05 1990-04-05 Transformer Expired - Fee Related JP2978525B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2089153A JP2978525B2 (en) 1990-04-05 1990-04-05 Transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2089153A JP2978525B2 (en) 1990-04-05 1990-04-05 Transformer

Publications (2)

Publication Number Publication Date
JPH03288413A JPH03288413A (en) 1991-12-18
JP2978525B2 true JP2978525B2 (en) 1999-11-15

Family

ID=13962906

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2089153A Expired - Fee Related JP2978525B2 (en) 1990-04-05 1990-04-05 Transformer

Country Status (1)

Country Link
JP (1) JP2978525B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6228515B2 (en) * 2014-06-25 2017-11-08 株式会社日立製作所 Reactor and power conversion device using the same

Also Published As

Publication number Publication date
JPH03288413A (en) 1991-12-18

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