JPH0128646Y2 - - Google Patents

Description

【考案の詳細な説明】 この考案は巻鉄心を分割したＣ字形鉄心とＩ字
形鉄心とを組付けてなる巻鉄心型変圧器に関す
る。[Detailed Description of the Invention] This invention relates to a wound core type transformer which is constructed by assembling a C-shaped core and an I-shaped core into which the wound core is divided.

従来から、変圧器は珪素鋼板を積み重ねた鉄心
を有する。この鉄心の一般的なものとして、例え
ば、Ｉ字形鋼板とＥ字形鋼板を左右交互に互い違
いに積上げて、日字状にしたものがあり、この鉄
心に予めこれとは別に巻いた巻線を嵌挿して、一
体化した変圧器を得る如くなつている。 Traditionally, transformers have cores made of stacked silicon steel plates. A common example of this core is one in which I-shaped steel plates and E-shaped steel plates are stacked alternately on the left and right, forming a diagonal shape. It seems like you can plug it in and get an integrated transformer.

しかし、かかる変圧器の組立てには、時間がか
かり過ぎ、人手をかりなければ電気的あるいは機
械的強度に於いて安定した変圧器を得ることがで
きない。また、かかる変圧器の鉄心では、積層し
た鋼板間に空〓ができることによつて鉄心の占有
断面積が大きくなるほか、その空〓内で起磁力
（アンペア回数）が大きなレベルで消耗されると
ともに、ウナリ振動を発生する場合があつた。ま
た、上記起磁力の消耗を補償すべく、鉄心を大き
くしたり、コイル巻回数を多くする必要があるた
め、変圧器全体の形状が大きくなり、重量が増加
し、この結果、シヤーシヘの取り付けが固難とな
る場合があつた。 However, it takes too much time to assemble such a transformer, and it is not possible to obtain a transformer with stable electrical or mechanical strength without manual intervention. In addition, in the iron core of such a transformer, the cross-sectional area occupied by the core becomes large due to the formation of air spaces between the laminated steel plates, and the magnetomotive force (ampere cycles) is consumed at a large level within the air space. , there were cases where undulating vibrations were generated. In addition, in order to compensate for the consumption of the magnetomotive force mentioned above, it is necessary to make the iron core larger and increase the number of coil turns, which increases the overall shape and weight of the transformer, which makes it difficult to install it on the chassis. There were some difficult times.

一方、かかる欠点を解決した変圧器として、電
磁鋼板を渦状に巻装した鉄心を主体とする巻鉄心
型変圧器が提供されている。この巻鉄心型変圧器
では磁束が電磁鋼板の圧延方向のみに通じ、また
上記従来の様な継目の空〓で消費される起磁力
を、補償する必要もない。このために、励磁電流
および鉄損が著るしく減少するとともに鉄心の形
成が容易かつ迅速になるという利点がある。 On the other hand, as a transformer that solves these drawbacks, a wound core type transformer is provided which mainly has an iron core spirally wound with magnetic steel sheets. In this wound core type transformer, the magnetic flux passes only in the rolling direction of the electromagnetic steel sheet, and there is no need to compensate for the magnetomotive force consumed by the gaps in the joints as in the conventional method. This has the advantage that the excitation current and iron losses are significantly reduced and the core formation is easier and faster.

ところで、この巻鉄心型変圧器では、巻鉄心に
対する巻線の巻装作業が面倒であるばかりか、磁
束が上記圧延方向にのみ流れやすく、一次巻線に
交流電流を加えたとき、急激に突入電流が二次巻
線に誘導されることとなり、二次巻線の加熱、断
線を防止し、かつ負荷回路を保護するために、回
路設計上、諸々の対策を講じる必要があつた。 By the way, in this wound core type transformer, not only is it troublesome to wind the winding around the wound core, but the magnetic flux tends to flow only in the rolling direction, and when alternating current is applied to the primary winding, it suddenly rushes in. Current was induced in the secondary winding, and it was necessary to take various measures in circuit design to prevent heating and disconnection of the secondary winding and to protect the load circuit.

これに対し、二個の巻鉄心と一個の短冊状鋼板
を積層した棒状鉄心とをそれぞれ用意し、その二
個の巻鉄心の相対向する積層面間に於ける巻鉄心
を縦方向に二分する位置に、上記棒状鉄心を介装
保持する様にした、巻鉄心型変圧器が既に提案さ
れている。 On the other hand, two wound cores and a rod-shaped core made by laminating one strip-shaped steel plate are prepared, and the wound core is vertically divided into two between the opposing laminated surfaces of the two wound cores. A wound core type transformer has already been proposed in which the rod-shaped core is interposed and held in place.

しかしながら、かかる巻鉄心型変圧器にあつて
は、上記三個の鉄心を順次積み重ねる構成となつ
ているため、その構成が大形化かつ重量化し、し
かも組立てになお十分な人手と時間を要するもの
となつていた。 However, in the case of such a wound core type transformer, since the three cores are stacked one after another, the structure becomes large and heavy, and furthermore, it requires sufficient manpower and time to assemble. It was becoming.

この考案はかかる従来の問題点に着目してなさ
れたもので、巻鉄心を分割した二つのＣ字形鉄心
とＩ字形鉄心とを組付けて、励磁電流および鉄損
を増加することなく、本来の巻鉄心の特性を得る
とともに、二次巻線への突入電流の誘導を防止し
た、小形かつ偏平の巻鉄心型変圧器を提供するも
のである。 This idea was made by focusing on such conventional problems, and by assembling two C-shaped cores and an I-shaped core into which the wound core was divided, it is possible to solve the original problem without increasing the excitation current and iron loss. The present invention provides a small and flat wound core type transformer that obtains the characteristics of a wound core and prevents the induction of rush current into a secondary winding.

以下に、この考案の実施例を図面について具体
的に説明する。 Embodiments of this invention will be specifically described below with reference to the drawings.

第１図および第２図はこの一実施例を示す斜視
図である。同図に於いて、１は鉄心で、第３図に
示す様に、電磁鋼帯を巻装してなる巻鉄心２を等
しく二分割することによつて得たＣ字形鉄心２
ａ，２ｂと、ボビンを介して巻線３を巻装してな
る積層構造のＩ字形鉄心４とからなり、このＩ字
形鉄心４は二つのＣ字形鉄心間に挟持され、表面
が円滑に研磨された各挟面が電気的、機械的に密
接している。なお、この密接保持はこれら各鉄心
２，４の各周に渦巻状に巻装した保持鋼帯５によ
つて堅固に行われている。６はＩ字形鉄心４の長
手方向端およびＣ字形鉄心２ａ，２ｂの内部端に
嵌合されたコ字状枠で、Ｉ字形鉄心４の締付けお
よび鉄心４と鉄心２ａ，２ｂとの機械的一体化並
びに磁気結合度の強化を図る様になつている。 FIGS. 1 and 2 are perspective views showing this embodiment. In the figure, reference numeral 1 denotes an iron core, and as shown in FIG.
a, 2b, and an I-shaped core 4 with a laminated structure in which a winding 3 is wound through a bobbin.This I-shaped core 4 is sandwiched between two C-shaped cores, and its surface is polished smoothly. The two sandwiched surfaces are electrically and mechanically in close contact with each other. Note that this close holding is firmly performed by a retaining steel band 5 wound spirally around each of the cores 2 and 4. Reference numeral 6 denotes a U-shaped frame fitted to the longitudinal end of the I-shaped core 4 and the inner ends of the C-shaped cores 2a, 2b, and is used to tighten the I-shaped core 4 and mechanically integrate the core 4 and the cores 2a, 2b. In recent years, efforts have been made to strengthen the magnetic coupling as well as the degree of magnetic coupling.

７は上記巻線３の上下面およびＣ字形鉄心２
ａ，２ｂの上下面の一部を覆う磁気シールド用の
銅帯である。この銅帯７は実用上重ね巻きせず一
巻きで十分である。８は第４図に示すような取付
ブラケツトで、鉄板をプレス成形によつて打抜き
成形したものである。この取付ブラケツト８は上
部に全長に亘る挟持片８ａ、下部に全長に亘る取
付片８ｂがそれぞれ設けられ、さらに中央部に切
り起こした挟持片８ｃとからなる。これらの両挟
片８ａ，８ｃの間隙は上記Ｃ字形鉄心の厚みに
略々等しくなつている。なお、取付片８ｂには取
付孔９が穿設されている。 7 indicates the upper and lower surfaces of the winding 3 and the C-shaped core 2.
This is a copper strip for magnetic shielding that covers part of the upper and lower surfaces of a and 2b. For practical purposes, it is sufficient to wrap the copper strip 7 once without overlapping it. Reference numeral 8 designates a mounting bracket as shown in FIG. 4, which is made by stamping an iron plate by press forming. This mounting bracket 8 is provided with a clamping piece 8a extending over the entire length at the upper part, a mounting piece 8b extending over the entire length at the lower part, and further comprises a clamping piece 8c cut and raised at the center. The gap between these two sandwich pieces 8a, 8c is approximately equal to the thickness of the C-shaped core. Note that a mounting hole 9 is bored in the mounting piece 8b.

この取付ブラケツト８は、各Ｃ字形鉄心２ａ，
２ｂの背面部にそれぞれ配置され、銅帯７の一部
とともに、上記各挟持片８ａ，８ｃ間に挟持させ
ることによつて、変圧器本体を安定に保持し、こ
れを電気機器のシヤーシに固定する様になつてい
る。図中１３は取付ブラケツト８の締付けバンド
である。また、１０は各鉄心４，２ａ，２ｂの上
面において、巻線３端に隣接して設けたリード保
持板で、合成樹脂などの絶縁板からなり、上記巻
線３の一次側リード１１および複数の二次側リー
ド１２を保持する様になつている。なお、図示し
ないが、組み付けたこれら鉄心１、巻線３の略々
全部を遮磁板によつて覆い、かつ絶縁ワニスが施
こされる。 This mounting bracket 8 is attached to each C-shaped core 2a,
2b, and are sandwiched together with a part of the copper band 7 between the respective clamping pieces 8a and 8c to stably hold the transformer body and fix it to the chassis of the electrical equipment. It's becoming like this. In the figure, reference numeral 13 indicates a tightening band for the mounting bracket 8. Further, 10 is a lead holding plate provided on the top surface of each core 4, 2a, 2b adjacent to the end of the winding 3, and is made of an insulating plate such as synthetic resin. It is designed to hold the secondary side lead 12 of. Although not shown, substantially all of the assembled iron core 1 and winding 3 are covered with a magnetic shielding plate, and an insulating varnish is applied.

かかる構成になる変圧器は、巻鉄心を二分割し
てＣ字形鉄心２ａ，２ｂとなし、これらの間に巻
線３を巻装したＩ字形鉄心を介在してなるもので
あるから、鉄心１全体の構成を偏平となしうるも
のである。しかも、実質的にＣ字形鉄心は巻鉄心
を構成するとともに、磁気的に励磁電流および鉄
損の減少に大きく寄与するところから、巻線の巻
回数を少なくでき、その巻装量の減少に伴う変圧
器の小形化、軽量化を図ることができるものであ
る。したがつて、変圧器の占有空間を抑制でき、
電気機器に対する用途がより広がることとなる。 In a transformer having such a configuration, the wound core is divided into two C-shaped cores 2a and 2b, and an I-shaped core with a winding 3 wound therebetween is interposed. The overall structure can be made flat. Moreover, since the C-shaped core essentially constitutes the wound core and magnetically contributes significantly to reducing the excitation current and iron loss, the number of turns of the winding wire can be reduced, and the amount of winding can be reduced. This allows the transformer to be made smaller and lighter. Therefore, the space occupied by the transformer can be suppressed,
This will further expand the range of applications for electrical equipment.

以上説明した様に、この考案によれば、巻鉄心
を分割した二つのＣ字形鉄心間に、予め巻線を施
してあるＩ字形鉄心を介装かつ接合し、これらの
各接合面が互いに密着する様に、コ字状枠及び取
付ブラケツトの外側面に締付けバンドを巻装した
ことによつて、薄形で軽量の巻鉄心型変圧器を構
成することができ、これによつて、本来の巻鉄心
型と同様の電気的、磁気的諸効果を得ることがで
きる。また、Ｃ字形鉄心とＩ字形鉄心とを結合し
た構成としたので、一次巻線に交流電流を加えた
際に突入電流が二次巻線に誘導される様なことも
なくなり、二次巻線および負荷への悪影響を有効
に防止することができる等の効果が得られる。 As explained above, according to this invention, a pre-wound I-shaped core is interposed and joined between two C-shaped cores obtained by dividing the wound core, and the joint surfaces of these are in close contact with each other. By wrapping a tightening band around the outer surface of the U-shaped frame and mounting bracket, it is possible to construct a thin and lightweight wound core transformer. The same electrical and magnetic effects as the wound core type can be obtained. In addition, since the configuration combines a C-shaped core and an I-shaped core, inrush current is not induced into the secondary winding when alternating current is applied to the primary winding. Also, effects such as being able to effectively prevent adverse effects on the load can be obtained.

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

第１図はこの考案の巻鉄心型変圧器の一実施例
を示す斜視図、第２図は同じく正面図、第３図は
鉄心構造を示す平面図、第４図は取付ブラケツト
の斜視図である。 ２……巻鉄心、２ａ，２ｂ……Ｃ字形鉄心、３
……巻線、４……Ｉ字形鉄心、５……保持鋼帯。 Fig. 1 is a perspective view showing an embodiment of the wound core type transformer of this invention, Fig. 2 is a front view, Fig. 3 is a plan view showing the core structure, and Fig. 4 is a perspective view of the mounting bracket. be. 2...Wound core, 2a, 2b...C-shaped core, 3
... Winding wire, 4 ... I-shaped core, 5 ... Holding steel strip.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 巻鉄心を分割した二つのＣ字形鉄心間に、予め
巻線を施したＩ字形鉄心を介装かつ接合し、上記
Ｉ字形鉄心の長手方向端およびＣ字形鉄心の内側
端にはコ字状枠が嵌合され、Ｃ字形鉄心の背面部
には下端に取付片を有する取付ブラケツトがそれ
ぞれ配置され、該取付ブラケツト及び上記コ字状
枠の外側面に締付けバンドが巻締めされてなるこ
とを特徴とする巻鉄心型変圧器。 A pre-wound I-shaped core is interposed and joined between two C-shaped cores obtained by dividing the wound core, and a U-shaped frame is provided at the longitudinal end of the I-shaped core and the inner end of the C-shaped core. are fitted, and mounting brackets each having a mounting piece at the lower end are arranged on the back side of the C-shaped core, and a tightening band is wound around the outer surface of the mounting bracket and the above-mentioned U-shaped frame. Wound core type transformer.