JP2939361B2 - Iron core with gap for transformer - Google Patents

Iron core with gap for transformer

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Publication number
JP2939361B2
JP2939361B2 JP14752891A JP14752891A JP2939361B2 JP 2939361 B2 JP2939361 B2 JP 2939361B2 JP 14752891 A JP14752891 A JP 14752891A JP 14752891 A JP14752891 A JP 14752891A JP 2939361 B2 JP2939361 B2 JP 2939361B2
Authority
JP
Japan
Prior art keywords
gap
transformer
upper yoke
leg
iron core
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
JP14752891A
Other languages
Japanese (ja)
Other versions
JPH04370912A (en
Inventor
勝 小野
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP14752891A priority Critical patent/JP2939361B2/en
Publication of JPH04370912A publication Critical patent/JPH04370912A/en
Application granted granted Critical
Publication of JP2939361B2 publication Critical patent/JP2939361B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Coils Of Transformers For General Uses (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は変圧器用ギャップ付鉄
心、特に半導体電力変換装置に使用される変換器用変圧
器のギャップ付鉄心に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core with a gap for a transformer, and more particularly to a core with a gap for a transformer used in a semiconductor power converter.

【0002】[0002]

【従来の技術】磁気浮上式鉄道用の電源などには、電力
会社の電力系統から商用周波数の三相交流を受電し、一
旦、コンバータにより直流に変換し、平滑コンデンサを
充電し、その平滑コンデンサを直流電源としたインバー
タにより任意の可変電圧・可変周波数の電力を得る変換
装置が用いられる。
2. Description of the Related Art A power supply for a magnetic levitation railway receives a commercial frequency three-phase alternating current from a power system of an electric power company, temporarily converts it into a direct current by a converter, charges a smoothing capacitor, and charges the smoothing capacitor. A converter is used that obtains power of an arbitrary variable voltage and variable frequency by an inverter using a DC power supply.

【0003】図5は、従来のインバータを用いた変換装
置の一相分を示した回路図であり、出力変圧器と呼ばれ
る変換器用変圧器1の直流側巻線2にGTO(ゲートタ
ーンオフサイリスタ)とダイオードからなる複数台の変
換器3を介して、直流電圧EDCを有する平滑コンデンサ
4に接続されている。交流側巻線5は複数台を直列に接
続し負荷6に接続されている。
FIG. 5 is a circuit diagram showing one phase of a conventional converter using an inverter. A GTO (gate turn-off thyristor) is connected to a DC side winding 2 of a transformer 1 for a converter called an output transformer. And a plurality of converters 3 composed of diodes and connected to a smoothing capacitor 4 having a DC voltage E DC . A plurality of AC side windings 5 are connected in series and connected to a load 6.

【0004】この方式は直列多重電圧形のインバータで
構成されており、PWM(パルス幅変調)方式と呼ば
れ、変換器3をPWM制御することにより、負荷6に加
わる電圧・周波数を任意に可変できる装置であり、その
動作の速応性、電源側の力率および高調波に関して良好
な特性が得られる。この装置は負荷6であるリニアモー
タからエネルギーを電源側へ回生させる作用も有してい
る。
This system is constituted by a series multiple voltage type inverter, and is called a PWM (pulse width modulation) system. By controlling the converter 3 by PWM, the voltage and frequency applied to the load 6 can be arbitrarily varied. It is a device that can be operated, and has good characteristics with respect to the responsiveness of its operation, the power factor on the power supply side, and harmonics. This device also has the function of regenerating energy from the linear motor as the load 6 to the power supply side.

【0005】図5の回路図に示すように、変換器用変圧
器1はT1〜TNまでのN台のユニット変圧器7から構
成されているが、それは一つの変換器3の容量には限度
があること、および各ユニット変圧器7毎にパルス幅や
位相を調整し、任意の合成電圧を得るためユニット変圧
器7を多数個直列に接続している。
As shown in the circuit diagram of FIG. 5, the transformer 1 for a converter is composed of N unit transformers T1 to TN, but the capacity of one converter 3 is limited. In addition, a large number of unit transformers 7 are connected in series to adjust the pulse width and phase for each unit transformer 7 and obtain an arbitrary combined voltage.

【0006】ところで、従来のユニット変圧器7は図6
に示すように、単相二脚鉄心の2つの主脚8に夫々直流
側巻線2と交流側巻線5を同軸状に巻装し、両主脚の各
巻線は各々並列接続されている。また、直流側・交流側
両巻線の間には接地シールド9を取付けるが、その役目
は両巻線の混触防止と交流側巻線5から直流側巻線2へ
の移行電圧を低減し、過電圧に弱い変換器3を保護する
ためである。
Meanwhile, the conventional unit transformer 7 is shown in FIG.
As shown in the figure, the DC winding 2 and the AC winding 5 are coaxially wound around two main legs 8 of a single-phase two-leg iron core, respectively, and the respective windings of both main legs are connected in parallel. . A ground shield 9 is attached between the DC side and the AC side windings to prevent contact between the two windings and to reduce the transition voltage from the AC side winding 5 to the DC side winding 2, This is to protect the converter 3 that is vulnerable to overvoltage.

【0007】通常の変圧器用鉄心では、できるだけ抜板
接合部のギャップを小さくし、磁気抵抗を小さくして励
磁電流などを小さくするが、このユニット変圧器用の鉄
心は、逆に磁気抵抗をある程度大きくして励磁電流を定
格電流の2〜5%程度にする必要がある。そのため、図
6のユニット変圧器の正面図に示すように、主脚8と上
部ヨーク10、下部ヨーク11の4ヶ箇所の接合部に磁
気的絶縁物を取付けたギャップ12を形成している。
[0007] In a normal transformer core, the gap at the blanking joint is reduced as much as possible, and the magnetic resistance is reduced to reduce the exciting current and the like. On the contrary, the core for the unit transformer has a relatively large magnetic resistance. It is necessary to set the exciting current to about 2 to 5% of the rated current. Therefore, as shown in the front view of the unit transformer in FIG. 6, a gap 12 is formed at the four joints of the main leg 8, the upper yoke 10, and the lower yoke 11 with magnetic insulators attached.

【0008】このギャップ12を設け磁気抵抗を大きく
する理由には次の2つがある。変換器3はPWM制御さ
れるので、僅かなオンタイミングのずれや制御上のず
れ、および変圧器を含む回路のインピーダンス特性の差
などにより直流成分の電流が発生する。この直流電流が
巻線に流れると鉄心には直流偏磁が発生して、鉄心は飽
和し、励磁電流が増大し、電力変換装置としての特性を
悪化すると共に変圧器は損失が増加し、振動・騒音も大
きくなる。しかしながら、この直流偏磁現象を完全に防
止することは困難であるので、定格電流の1%程度まで
の直流電流が流れても、前述のギャップ12を設けるこ
とにより、鉄心の磁気抵抗を大きくし、直流偏磁量をよ
り小さく抑え、鉄心飽和にならないようにしているのが
第1の理由である。第2の理由はギャップ12を形成す
ることによりユニット変圧器7間の励磁インピーダンス
のバラツキを数%以内にできることである。すなわち、
鉄心の抜板材質差による磁気特性のバラツキや接合部の
不揃などに起因する励磁インピーダンスのバラツキを、
このギャップ12を正確に、各ユニット変圧器が同一に
なるように製造することにより改善できるからである。
なお、励磁インピーダンスのバラツキを小さくする理由
は、交流側巻線5から直流側巻線2へ電力を回生する場
合に、直列接続されるN台の交流側巻線5に発生する電
圧を各ユニット変圧器間で、ほぼ同一とし電力変換装置
としての動作を良好に維持するためである。
There are two reasons for providing the gap 12 to increase the magnetic resistance. Since the converter 3 is PWM-controlled, a DC component current is generated due to a slight shift in ON timing and a shift in control, a difference in impedance characteristics of a circuit including a transformer, and the like. When this DC current flows through the windings, DC magnetization occurs in the iron core, the iron core saturates, the exciting current increases, the characteristics of the power conversion device deteriorate, and the loss of the transformer increases.・ Noise increases. However, since it is difficult to completely prevent this DC bias phenomenon, even if a DC current up to about 1% of the rated current flows, the magnetic resistance of the iron core is increased by providing the gap 12 described above. The first reason is that the amount of DC bias is reduced to prevent the core from becoming saturated. The second reason is that the formation of the gap 12 makes it possible to reduce the variation of the excitation impedance between the unit transformers 7 to within several percent. That is,
Variations in the magnetic impedance due to the difference in the material of the core punching and variations in the excitation impedance due to irregularities in the joints, etc.
This is because the gap 12 can be improved by manufacturing the unit transformers exactly the same.
The reason for reducing the variation in the excitation impedance is that when the power is regenerated from the AC side winding 5 to the DC side winding 2, the voltage generated in N units of the AC side windings 5 connected in series is set to each unit. This is because the transformers are almost the same, and the operation as the power conversion device is favorably maintained.

【0009】[0009]

【発明が解決しようとする課題】従来の電力変換装置で
は必要とするユニット変圧器7の容量が小さく、直列に
接続する台数Nも少なかったので、その巻線群を2脚に
巻装し、巻線群数を2倍とする方法でも製造上および使
用上で問題はなかった。しかし、電力変換装置が大容量
となり、ユニット変圧器7の容量も大きく、直列にする
台数Nも多くなり、全体として大規模な機器となれば、
その鉄心も大きくかつ重くなり、ギャップ長の調整など
その工作も困難となってきた。
In the conventional power converter, since the required capacity of the unit transformer 7 is small and the number N connected in series is small, the winding group is wound around two legs. The method of doubling the number of winding groups has no problem in production and use. However, if the power conversion device has a large capacity, the capacity of the unit transformer 7 is large, and the number N of units to be connected in series is large, and if the device becomes a large-scale device as a whole,
The iron core has also become larger and heavier, making it difficult to adjust the gap length and other operations.

【0010】本発明は上記課題を解決するためになされ
たもので、その目的は巻線群数を2倍にする必要がな
く、励磁インピーダンスを仕様値に合せるためのギャッ
プ長の調整が容易にでき、より安価な変換器用変圧器を
可能とした変圧器用ギャップ付鉄心を提供することにあ
る。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to eliminate the necessity of doubling the number of winding groups and to easily adjust a gap length for adjusting an excitation impedance to a specified value. It is an object of the present invention to provide a transformer core with a gap, which enables a transformer transformer to be manufactured at a lower cost.

【0011】[0011]

【課題を解決するための手段】本発明は、上記目的を達
成するために、変圧器巻線を巻装した主脚と、前記主脚
の両脇に配置された側脚と、前記主脚と前記側脚を接合
する上部ヨークおよび下部ヨークを有し前記上部ヨー
クの前記主脚と前記側脚の間に設けられ前記上部ヨーク
の中央部分を前記主脚の軸線と平行の方向に相対的に移
動可能とするラップ接合の継ぎ目と、前記主脚の上部と
前記上部ヨークの中央部分との間に設けられた磁気的絶
縁物のギャップとを備えたことを特徴とする。
In order to achieve the above object, the present invention provides a main leg on which a transformer winding is wound, side legs arranged on both sides of the main leg, and a main leg. an upper yoke and a lower yoke joining the side legs and the upper yaw
The upper yoke provided between the main leg and the side leg of
Center of the main landing gear in a direction parallel to the axis of the main landing gear.
A movable seam of the lap joint,
Magnetic isolation provided between the upper yoke and the central portion
And an edge gap .

【0012】[0012]

【作用】本発明の鉄心は上記の如く構成されているの
で、巻線群を1群だけにでき、主脚部に磁気的絶縁物の
ギャップが形成してあるので、鉄心の磁気抵抗を大き
く、励磁インピーダンスをより小さくでき、しかもギャ
ップの取付位置が巻線群より上部であるから、上部ヨー
クの取り外しだけで励磁インピーダンスを仕様値に合せ
るためのギャップ長の調整を容易に行なうことができ
る。また、上部ヨークにその中央部分を主脚の軸線と平
行の方向に相対的に移動することのできるラップ接合の
継ぎ目を設けたので、ギャップ長を調整するにあたって
鉄心に機械的歪みを与えることがなく、磁気損失を増大
させることがない。
Since the iron core of the present invention is constituted as described above, only one group of windings can be formed, and a gap of a magnetic insulator is formed in the main leg, so that the magnetic resistance of the iron core is increased. Since the exciting impedance can be made smaller and the gap mounting position is above the winding group, the gap length for adjusting the exciting impedance to the specified value can be easily adjusted only by removing the upper yoke. Also, center the upper yoke with the axis of the main landing gear.
Of wrap joint that can move relatively in the direction of the row
Since the seam is provided, when adjusting the gap length
Increases magnetic loss without mechanical strain on iron core
I will not let you.

【0013】[0013]

【実施例】以下、本発明の実施例を図を参照して説明す
る。図1は本発明の一実施例の正面図である。同図に示
すように、本実施例の鉄心は直流側巻線2、接地シール
ド9および交流側巻線5を巻装した主脚13とその両脇
に側脚14が設けられている。これら主脚13と側脚1
4は上部ヨーク15と下部ヨーク16とで接合され、主
脚13と上部ヨーク15との間には寸法Gの磁気的絶縁
物のギャップ17が形成されている。また、上部ヨーク
15の主脚13と側脚14間には、ラップ接合の継ぎ目
18が設けられている。そして図示されていないが、主
脚13および側脚14を構成する抜板の表面には各々当
て板が取付けられ、また上部ヨーク15および下部ヨー
ク16を構成する抜板の表面には各々クランプが取付け
られ、ボルト締付けあるいはガラステープなどによりバ
インド締付けされている。なお、ギャップ付鉄心では、
ギャップ部を通過する磁束によりギャップ面間に磁気吸
引力が働き振動・騒音が発生するので、ギャップ部は締
付スタッドなどにより強固に締付けられている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of one embodiment of the present invention. As shown in the figure, the iron core of the present embodiment is provided with a main leg 13 on which a DC side winding 2, a ground shield 9 and an AC side winding 5 are wound, and side legs 14 on both sides thereof. These main leg 13 and side leg 1
4 is joined by an upper yoke 15 and a lower yoke 16, and a gap 17 of a magnetic insulator having a dimension G is formed between the main leg 13 and the upper yoke 15. A lap joint seam 18 is provided between the main leg 13 and the side leg 14 of the upper yoke 15. Although not shown in the drawing, a backing plate is attached to each of the surfaces of the blanks constituting the main leg 13 and the side legs 14, and a clamp is provided on each of the blanks constituting the upper yoke 15 and the lower yoke 16. It is mounted and tightened by bolts or glass tape. In addition, in the core with gap,
Since the magnetic flux passing through the gap causes magnetic attraction between the gap surfaces to generate vibration and noise, the gap is tightly fastened by a fastening stud or the like.

【0014】更に、図2の拡大平面図に示すように、上
部ヨーク15はケイ素鋼板の抜板を積層して構成されて
おり、その継ぎ目18は寸法Aでラップジョイントさ
れ、左右の上部ヨーク15は磁気的には接合されている
が、図1に示す寸法Bの部分は上下方向には相対的に移
動が可能となるように構成されている。
Further, as shown in the enlarged plan view of FIG. 2, the upper yoke 15 is formed by laminating punched silicon steel plates, and the joint 18 is lap-joined with a dimension A, and the left and right upper yokes 15 Are magnetically joined, but the portion of dimension B shown in FIG. 1 is configured to be relatively movable in the vertical direction.

【0015】まず、本実施例の変圧器用ギャップ付鉄心
の作用について説明する。仮に上部ヨーク15が継ぎ目
18がない一枚もので構成していると、下部ヨーク16
と上部ヨーク15を上下に締付けることによって主脚1
3、ギャップ17および側脚14には圧縮力が加わる
が、製作上の寸法公差、組立上の誤差により接合部には
隙間が生じたり上部ヨーク15が突っ張ったりする恐れ
がある。また主脚13と側脚14の上下方向の寸法にバ
ラツキがあると、ギャップ17が適切な圧力で締付けら
れず振動・騒音が増加する恐れがある。
First, the operation of the transformer core with a gap according to the present embodiment will be described. If the upper yoke 15 is made of a single piece without a seam 18, the lower yoke 16
And the upper yoke 15 are tightened up and down to
3, a compressive force is applied to the gap 17 and the side legs 14, but there is a possibility that a gap may be formed at the joint or the upper yoke 15 may be stretched due to dimensional tolerances in manufacture and errors in assembly. Also, if the vertical dimension of the main leg 13 and the side leg 14 varies, the gap 17 may not be tightened with an appropriate pressure and vibration and noise may increase.

【0016】しかし、本実施例では上部ヨーク15には
継ぎ目18があり、寸法Bの部分は上下方向に移動が可
能なので、前記の各誤差を吸収して締付力が均一に加わ
るようにできるので、振動・騒音の増加を抑制すること
ができる。
However, in this embodiment, the upper yoke 15 has the seam 18 and the portion having the dimension B can be moved in the vertical direction, so that the above-mentioned errors can be absorbed and the tightening force can be uniformly applied. Therefore, an increase in vibration and noise can be suppressed.

【0017】ところで、変圧器を運転した場合に鉄心の
温度が高くなると、主脚と側脚間に熱膨脹による伸びの
差が生じ、上部ヨーク15を押し曲げたりして無理な曲
げ応力や圧縮応力が発生し磁気歪が大きくなり、磁気歪
による振動・騒音が増加するが、本実施例では継ぎ目1
8の作用によって無理な力は発生しないので、磁気歪に
よる振動・騒音の増加を抑制することができる。
When the temperature of the iron core rises when the transformer is operated, a difference in elongation occurs between the main leg and the side leg due to thermal expansion, and the upper yoke 15 is pushed or bent, and excessive bending stress or compressive stress is generated. Occurs, the magnetostriction increases, and the vibration and noise due to the magnetostriction increase.
Since an excessive force is not generated by the action of 8, it is possible to suppress an increase in vibration and noise due to magnetostriction.

【0018】次に、本実施例におけるギャップ長の調整
法について説明する。まず、主脚13と側脚14を下部
ヨーク16で接合し、主脚13に巻線群を挿入し、主脚
13の上部にギャップ17を取付けた後、上部ヨーク1
5を組込み、クランプと上下締付スタッドを取付け締付
ける。そして、交流側巻線5に交流電源を接続し、励磁
インピーダンスを測定する。測定された励磁インピーダ
ンスが仕様値を満足しない場合には一旦組立てた上部ヨ
ーク15を取外し、ギャップ17の寸法Gを調整し、再
度上部ヨーク15を組立て、励磁インピーダンスが仕様
値を満足するように調整する。
Next, a method of adjusting the gap length in this embodiment will be described. First, the main leg 13 and the side leg 14 are joined by the lower yoke 16, a winding group is inserted into the main leg 13, a gap 17 is attached to the upper portion of the main leg 13, and then the upper yoke 1
5. Install the clamp and upper and lower tightening studs and tighten. Then, an AC power supply is connected to the AC side winding 5, and the excitation impedance is measured. If the measured excitation impedance does not satisfy the specification value, the assembled upper yoke 15 is removed, the dimension G of the gap 17 is adjusted, the upper yoke 15 is assembled again, and the excitation impedance is adjusted to satisfy the specification value. I do.

【0019】このようにギャップ17の寸法Gを調整す
ることにより主脚13とギャップ17の合計高さが側脚
14と異なっても継ぎ目18があるので、その分上部ヨ
ーク15の寸法Bの部分を上下方向に移動すればよい。
By adjusting the dimension G of the gap 17 in this manner, the joint 18 exists even if the total height of the main leg 13 and the gap 17 is different from that of the side leg 14, so that the portion of the size B of the upper yoke 15 is correspondingly increased. May be moved up and down.

【0020】本実施例は上記のように構成されているの
で、従来形では巻線が2群必要であったが半分の1群に
できる。また、巻線群数を半分にしても1群当りの容量
は2倍となるため容量的には同じであるが容量が半分の
ものを2群製作する従来のものより、容量は2倍である
が1群製作する本実施例の方が、必要とする資材は減少
し、発生する損失も低減できるので、小形軽量化が可能
であり、工作上のメリットが大きい。
Since the present embodiment is configured as described above, two groups of windings are required in the conventional type, but the number of windings can be reduced to one group. Even if the number of winding groups is halved, the capacity per group is doubled, so that the capacity is the same. However, the capacity is twice as large as that of the conventional one in which two groups having half capacity are manufactured. However, in this embodiment in which one group is manufactured, the required materials are reduced and the generated loss can be reduced, so that the size and weight can be reduced, and the merit in working is great.

【0021】図3は本発明の他の実施例の部分図であ
る。同図に示すようにギャップ17の上に三角形の抜板
20を圧延方向19が上下方向になるように取付ける。
図の矢印19で示す圧延方向は方向性珪素鋼板の圧延方
向であり、その圧延方向に磁束が流れるようにして発生
損失を少なくしている。しかし図1の実施例のような鉄
心構成では主脚13よりギャップ17を通って上部ヨー
ク15へ流れる磁束については、上部ヨーク15の部分
ではその圧延方向と直角方向に流れる成分があるため、
その部分の発生損失が大きくなり、局部過熱の原因にな
る。そこで、適用される装置がより大きくなり、その鉄
心寸法が大形になる場合や発生損失を特に少なくする必
要がある場合がある。ところが、本実施例ではギャップ
17の上に三角形の抜板20を圧延方向19が上下方向
になるように設けているので、磁束は圧延方向のみに流
れ、前述の圧延方向と直角な方向に流れる磁束による発
生損失の増加がなくなり、局部過熱の防止に効果があ
る。
FIG. 3 is a partial view of another embodiment of the present invention. As shown in the figure, a triangular blank 20 is mounted on the gap 17 so that the rolling direction 19 is vertical.
The rolling direction indicated by arrow 19 in the figure is the rolling direction of the grain-oriented silicon steel sheet, and the magnetic flux flows in the rolling direction to reduce the generated loss. However, in the iron core configuration as in the embodiment of FIG. 1, the magnetic flux flowing from the main leg 13 to the upper yoke 15 through the gap 17 has a component flowing in a direction perpendicular to the rolling direction in the upper yoke 15 portion.
The loss generated in that part increases, causing local overheating. Therefore, there are cases where the applied device becomes larger, the core size thereof becomes large, and the generated loss needs to be particularly reduced. However, in this embodiment, since the triangular blank 20 is provided on the gap 17 so that the rolling direction 19 is vertical, the magnetic flux flows only in the rolling direction, and flows in a direction perpendicular to the above-described rolling direction. There is no increase in loss caused by magnetic flux, which is effective in preventing local overheating.

【0022】図4は本発明のさらに他の実施例の部分図
である。本実施例では主脚13の上部を山形に出張ら
し、上部ヨーク15をその分切り欠き、その間に逆V字
形のギャップ21を取付けるように構成したものであ
る。したがって、本実施例によると、主脚13よりギャ
ップ21を通って上部ヨーク15へ流れる磁束は圧延方
向のみに流れるようになり、前記のような発生損失の増
加がなくなり局部過熱の防止に役立つ。
FIG. 4 is a partial view of still another embodiment of the present invention. In the present embodiment, the upper part of the main leg 13 is made to travel in a mountain shape, the upper yoke 15 is cut out by that amount, and an inverted V-shaped gap 21 is attached therebetween. Therefore, according to the present embodiment, the magnetic flux flowing from the main leg 13 to the upper yoke 15 through the gap 21 flows only in the rolling direction, and the above-described increase in the generated loss is eliminated, which helps to prevent local overheating.

【0023】[0023]

【発明の効果】以上説明したように、本発明によれば、
1群当りの巻線容量は従来例に比べ2倍となるが巻線群
数を半分にすることができるので、製品としての外形寸
法・重量を小形化・軽量化でき、かつギャップ長の調整
が容易に行えるので、より安価な変換器用変圧器を可能
とする変圧器用ギャップ付鉄心を提供できる。
As described above, according to the present invention,
The winding capacity per group is twice as large as that of the conventional example, but the number of winding groups can be reduced by half, so the external dimensions and weight of the product can be reduced in size and weight, and the gap length can be adjusted. Therefore, it is possible to provide a transformer-equipped iron core that enables a more inexpensive transformer for a transformer.

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

【図1】本発明の一実施例の正面図。FIG. 1 is a front view of an embodiment of the present invention.

【図2】図1における継ぎ目部の拡大平面図。FIG. 2 is an enlarged plan view of a joint portion in FIG.

【図3】本発明の他の実施例の部分図。FIG. 3 is a partial view of another embodiment of the present invention.

【図4】本発明のさらに他の実施例の部分図。FIG. 4 is a partial view of still another embodiment of the present invention.

【図5】図5は従来の磁気浮上式鉄道用の電力変換装置
のインバータの結線図。
FIG. 5 is a connection diagram of an inverter of a conventional power converter for a magnetically levitated railway.

【図6】従来の変換器用変圧器を構成するユニット変圧
器の正面図。
FIG. 6 is a front view of a unit transformer constituting a conventional transformer for a converter.

【符号の説明】[Explanation of symbols]

1…変換器用変圧器、2…直流側巻線、3…変換器、4
…平滑コンデンサ、5…交流側巻線、6…負荷、7…ユ
ニット変圧器、8…主脚、9…接地シールド、10…上
部ヨーク、11…下部ヨーク、12…ギャップ、13…
主脚、14…側脚、15…上部ヨーク、16…下部ヨー
ク、17…ギャップ、18…継ぎ目、19…圧延方向、
20…三角形抜板、21…逆V字形ギャップ。
DESCRIPTION OF SYMBOLS 1 ... Transformer transformer, 2 ... DC side winding, 3 ... Converter, 4
... Smoothing capacitor, 5 AC winding, 6 Load, 7 Unit transformer, 8 Main leg, 9 Ground shield, 10 Upper yoke, 11 Lower yoke, 12 Gap, 13
Main leg, 14 ... side leg, 15 ... upper yoke, 16 ... lower yoke, 17 ... gap, 18 ... seam, 19 ... rolling direction,
20: Triangular blank, 21: inverted V-shaped gap.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 変圧器巻線を巻装した主脚と、前記主脚
の両脇に配置された側脚と、前記主脚と前記側脚を接合
する上部ヨークおよび下部ヨークを有し前記上部ヨー
クの前記主脚と前記側脚の間に設けられ前記上部ヨーク
の中央部分を前記主脚の軸線と平行の方向に相対的に移
動可能とするラップ接合の継ぎ目と、前記主脚の上部と
前記上部ヨークの中央部分との間に設けられた磁気的絶
縁物のギャップとを備えたことを特徴とする変圧器用ギ
ャップ付鉄心。
Has claim 1. A main landing gear with wound transformer windings, a side legs disposed on both sides of said main leg, the upper yoke and the lower yoke joining the side legs and said main leg, The upper yaw
The upper yoke provided between the main leg and the side leg of
Center of the main landing gear in a direction parallel to the axis of the main landing gear.
A movable seam of the lap joint,
Magnetic isolation provided between the upper yoke and the central portion
An iron core with a gap for a transformer, comprising an edge gap .
JP14752891A 1991-06-19 1991-06-19 Iron core with gap for transformer Expired - Fee Related JP2939361B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14752891A JP2939361B2 (en) 1991-06-19 1991-06-19 Iron core with gap for transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14752891A JP2939361B2 (en) 1991-06-19 1991-06-19 Iron core with gap for transformer

Publications (2)

Publication Number Publication Date
JPH04370912A JPH04370912A (en) 1992-12-24
JP2939361B2 true JP2939361B2 (en) 1999-08-25

Family

ID=15432356

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14752891A Expired - Fee Related JP2939361B2 (en) 1991-06-19 1991-06-19 Iron core with gap for transformer

Country Status (1)

Country Link
JP (1) JP2939361B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3776748B2 (en) * 2001-05-30 2006-05-17 株式会社東芝 Laminated iron core, method for manufacturing the same, and transformer

Also Published As

Publication number Publication date
JPH04370912A (en) 1992-12-24

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