JPS6240411Y2 - - Google Patents

Description

【考案の詳細な説明】 ［産業上の利用分野］ 本考案は、非接触で回転体に電力、又は電気信
号を伝達出来るようにした回転変圧器の鉄心構造
に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an iron core structure of a rotating transformer that allows power or electrical signals to be transmitted to a rotating body in a non-contact manner.

［従来の技術と考案が解決しようとする問題点］ 従来、静止部から回転部に対して電力、又は電
気信号を伝達する場合には、ブラシやスリツプリ
ング等を用いた接触式機械装置、あるいは無線式
テレメータ等が用いられている。[Problems to be solved by conventional techniques and ideas] Conventionally, when transmitting power or electrical signals from a stationary part to a rotating part, contact mechanical devices using brushes, slip rings, etc. Wireless telemeters etc. are used.

しかしながら、接触式機械装置では、ブラシや
スリツプリングの摩耗交換等のために保守が必要
となり、又、無線式テレメータではノイズに弱
く、しかも大変に高価となる問題点があつた。 However, contact-type mechanical devices require maintenance to replace wear-and-tear brushes and slip rings, and wireless telemeters are susceptible to noise and are very expensive.

［考案の目的］ 本考案は上記事情に鑑みてなされたもので、静
止部から回転部に対して非接触式で電力、又は電
気信号を効率よく伝達出来、しかも安価に製作出
来る回転変圧器の鉄心構造を提供することを目的
としている。[Purpose of the invention] The present invention was made in view of the above circumstances, and is a rotating transformer that can efficiently transmit power or electrical signals from a stationary part to a rotating part in a non-contact manner, and can be manufactured at a low cost. The purpose is to provide an iron core structure.

［問題点を解決するための手段］ 上記問題点を解決するために、本考案の回転変
圧器の鉄心構造は、硅素鋼板を短冊状に切断して
枠型にしたもの又は硅素鋼板を枠状に打抜いたも
のを、積層し、かつその層の厚さ方向で２分割す
るよう形成した一対の枠状の外鉄心と、非磁性体
の軸に前記外鉄心の枠内寸法よりやや狭い幅の帯
状の硅素鋼板を巻き付け成形し、その軸方向の１
ケ所にすり割りを設けた内鉄心（回転鉄心）と、
前記一対の外鉄心の接合面内の相対峠する枠中央
部分に前記軸が挿通されるよう設けた回転軸用穴
と、この回転軸用穴に挿通された軸を前記内鉄心
がその両端面を外鉄心の枠内面に対峠して該枠内
で自由に回転するように支持した軸受とから構成
している。[Means for Solving the Problems] In order to solve the above problems, the core structure of the rotating transformer of the present invention is made by cutting a silicon steel plate into strips into a frame shape or by cutting a silicon steel plate into a frame shape. A pair of frame-shaped outer cores are formed by laminating punched materials and dividing them into two in the thickness direction of the layers, and a non-magnetic shaft has a width slightly narrower than the inner frame dimension of the outer core. Wrap and form a band-shaped silicon steel plate, and
An inner core (rotating core) with slots in several places,
A rotary shaft hole is provided in the center portion of the frame where the pair of outer cores meet relative to each other, and the shaft is inserted through the rotary shaft hole. A bearing is supported against the inner surface of a frame of an outer core so as to rotate freely within the frame.

［実施例］ 以下図面を参照して本考案による実施例を具体
的に説明する。[Examples] Examples of the present invention will be specifically described below with reference to the drawings.

第１図乃至第５図は本考案の一実施例に係り、
第１図は外鉄心及び内鉄心の分解斜視図、第２図
は短冊状に切断した硅素鋼板を示す斜視図、第３
図は第２図の短冊状硅素鋼板を枠状に組立た斜視
図、第４図は積層した一対の枠状の外鉄心を示す
斜視図、第５図は回転変圧の鉄心構造の組立斜視
図である。 1 to 5 relate to an embodiment of the present invention,
Figure 1 is an exploded perspective view of the outer core and inner core, Figure 2 is a perspective view showing a silicon steel plate cut into strips, and Figure 3 is an exploded perspective view of the outer core and inner core.
The figure is a perspective view of the rectangular silicon steel plates in Figure 2 assembled into a frame shape, Figure 4 is a perspective view showing a pair of laminated frame-shaped outer cores, and Figure 5 is an assembled perspective view of the core structure of a rotary transformer. It is.

これらの図において回転変圧器の外鉄心３は、
短冊状に切断した硅素鋼板（従来の切り鉄心）１
を枠型に形成したもの、あるいは枠状に打抜いた
硅素鋼板（打抜き鉄心）４を、例えばエポキシ接
着剤を焼付け接着して積層し、成形されている。
そして、前記外鉄心３は層の厚さ方向で２分割す
るように成形され、その接合面内の相対峠する枠
中央部分には回転軸用穴２が設けられている。 In these figures, the outer core 3 of the rotating transformer is
Silicon steel plate cut into strips (conventional cut iron core) 1
It is formed by laminating silicon steel plates (punched iron core) 4 formed into a frame shape or punched into a frame shape by baking and bonding them with, for example, epoxy adhesive.
The outer core 3 is formed so as to be divided into two parts in the thickness direction of the layers, and a rotary shaft hole 2 is provided in the center part of the frame where the two parts meet in the joint plane.

一方、内鉄心（回転鉄心）６は、非磁性体（例
えば、ステンレス、真鍮、アルミニウム等）から
なる軸５に帯状硅素鋼板を巻き付けて形成されて
いる。この内鉄心６は、例えば、巻き始めを軸５
にアルゴン溶接にて点付けし、２層巻くごとに２
ケ所点付けして所定の大きさに巻き上げ成形され
る。前記内鉄心６は外鉄心３の枠内に入る大きさ
に形成され、かつその軸５方向の幅は、該外鉄心
３の内側寸法よりもやや狭く形成されている。そ
して、この巻き上げ成形された内鉄心６は約700
℃にて焼鈍し、磁気特性のグレードアツプ、はね
返り弾性を取り除いて軸５に密着される。 On the other hand, the inner core (rotating core) 6 is formed by wrapping a band-shaped silicon steel plate around a shaft 5 made of a non-magnetic material (for example, stainless steel, brass, aluminum, etc.). For example, the inner core 6 has a winding start on the shaft 5.
dotted with argon welding, and dotted every 2 layers.
It is dotted in several places and rolled up to a predetermined size. The inner core 6 is formed to a size that fits within the frame of the outer core 3, and its width in the axis 5 direction is slightly narrower than the inner dimension of the outer core 3. This rolled-up inner core 6 has a diameter of approximately 700 mm.
It is annealed at ℃, improves the magnetic properties, removes rebound elasticity, and is tightly attached to the shaft 5.

又、前記内鉄心６には軸５方向に渦電流を防止
するための、すり割り７が形成されている。そし
て、このように形成された鉄心構造には、周知の
ように、内鉄心６の外周部に電気絶縁物を巻装
し、その外側に２次コイル１３が円筒状に巻装さ
れる。この２次コイル１３の巻き始めと巻き終り
にはリード線が設けられており、このリード線は
内鉄心６の外周部から軸５内まで貫通形成された
リード線引出し用穴１１から、該軸５内を通して
軸端より外に導出される。巻き線を施した内鉄心
６は、例えば、ワニス真空浸漬し、乾燥して仕上
られる。次に、円筒状に形成された１次コイル１
４内に、前記２次コイル１３が巻装された内鉄心
６が挿通され、かつ２分割された一方の外鉄心３
の回転軸用穴２に軸５を合せて装着し、もう片方
を合せて外鉄心３に形成されたボルト穴９にそれ
ぞれボルトを挿通して締付け固定される。前記外
鉄心３の中央の回転軸用穴２の両側部から出てい
る軸５部分は、軸受８により回転自在に支持され
ている。この軸受８は軸受支持部１０に取付けら
れ、この軸受支持部１０は前記外鉄心３の端面に
ビスにより取付けられている。前記軸受支持部１
０は軸５が回転軸用穴２に接触しないように調整
できるとともに、内鉄心６が外鉄心３の内側に接
触しないように軸方向に調整できるようになつて
いる。そして、前記内鉄心６と一緒に内蔵した円
筒状の１次コイル１４は外鉄心３の内側に接着剤
にて確実に固定される。 Furthermore, slots 7 are formed in the inner core 6 to prevent eddy currents from occurring in the direction of the shaft 5. In the core structure thus formed, as is well known, an electrical insulator is wound around the outer periphery of the inner core 6, and a secondary coil 13 is wound in a cylindrical shape on the outside thereof. A lead wire is provided at the beginning and end of the winding of the secondary coil 13, and the lead wire is passed through the lead wire draw-out hole 11 formed from the outer periphery of the inner core 6 to the inside of the shaft 5. 5 and is led out from the shaft end. The wire-wound inner core 6 is finished by, for example, being vacuum dipped in varnish and dried. Next, the primary coil 1 formed in a cylindrical shape
4, the inner core 6 around which the secondary coil 13 is wound is inserted, and one of the outer cores 3 is divided into two parts.
The shaft 5 is aligned and installed in the rotary shaft hole 2, and the other end is aligned and bolts are inserted into the bolt holes 9 formed in the outer core 3 and tightened and fixed. The shaft 5 portions protruding from both sides of the rotary shaft hole 2 at the center of the outer core 3 are rotatably supported by bearings 8. This bearing 8 is attached to a bearing support part 10, and this bearing support part 10 is attached to the end face of the outer iron core 3 with screws. The bearing support part 1
0 can be adjusted so that the shaft 5 does not come into contact with the rotating shaft hole 2, and can be adjusted in the axial direction so that the inner core 6 does not come into contact with the inside of the outer core 3. The cylindrical primary coil 14 housed together with the inner core 6 is securely fixed inside the outer core 3 with an adhesive.

次に、上記構成に基ずく回転変圧器の鉄心構造
の作用を説明する。 Next, the operation of the core structure of the rotary transformer based on the above configuration will be explained.

まず従来の交流電圧および電流の大きさを変え
るために鉄心に１次および２次巻線をした、例え
ば単相変圧器と同様に、１次コイル１４に交流電
圧を加えれば磁束が発生し、この磁束は外鉄心
３、内鉄心６を流れる磁路を形成し、２次コイル
１３には巻線比に応じた電圧が発生する。この場
合内鉄心６、あるいは外鉄心３のどちらか一方を
回転させ、あるいは双方を同方向あるいは反対方
向に回転させても、磁束、磁路抵抗等は全く変化
を生じない。従つて、非接触で電力、あるいは電
気信号が伝達される。 First, like a conventional single-phase transformer in which primary and secondary windings are installed on an iron core to change the magnitude of AC voltage and current, when AC voltage is applied to the primary coil 14, magnetic flux is generated. This magnetic flux forms a magnetic path flowing through the outer core 3 and the inner core 6, and a voltage is generated in the secondary coil 13 according to the winding ratio. In this case, even if either the inner core 6 or the outer core 3 is rotated, or both are rotated in the same direction or in opposite directions, the magnetic flux, magnetic path resistance, etc. do not change at all. Therefore, power or electrical signals are transmitted without contact.

このとき、外鉄心３は硅素鋼板を枠型にして積
層され、この枠内に軸５に帯状に巻付けられた硅
素鋼板からなる内鉄心６を軸受８で支持するよう
にしているため、外鉄心３の枠内側内面と内鉄心
６の両端面が硅素鋼板の板厚の端面で対峠し、か
つ外鉄心３の枠の内側と内鉄心６の両端部とで形
成される隙間を小さくしてエアギヤツプ損失を少
なくし完全に近い磁路を形成させて変圧器として
の効率、特性を向上させることができる。又、軸
５を非磁性材料で形成しているため、軸５内で磁
場を生じることがなく効率の低下を防止すること
ができる。さらに軸５は軸受８で支持されている
ため、磁力により引き付けられて内鉄心６が外鉄
心３に接触したりすることなく、ウナリを生じる
ことがなくなる。さらに又、外鉄心を２分割で成
形しているため構造、組立も簡単になり安価に製
作することが出来る。 At this time, the outer core 3 is laminated with silicon steel plates in the form of a frame, and the inner core 6 made of silicon steel plates wrapped in a band shape around the shaft 5 is supported by bearings 8 within this frame. The inner surface of the frame of the iron core 3 and both end surfaces of the inner iron core 6 face each other at the thick end surfaces of the silicon steel plate, and the gap formed between the inside of the frame of the outer iron core 3 and both ends of the inner iron core 6 is reduced. It is possible to reduce air gap loss and form a nearly perfect magnetic path, thereby improving the efficiency and characteristics of the transformer. Furthermore, since the shaft 5 is made of a non-magnetic material, no magnetic field is generated within the shaft 5, thereby preventing a decrease in efficiency. Furthermore, since the shaft 5 is supported by the bearing 8, the inner core 6 does not come into contact with the outer core 3 due to magnetic force, and no undulating occurs. Furthermore, since the outer core is molded in two parts, the structure and assembly are simple and can be manufactured at low cost.

［考案の効果］ 以上説明したように本考によれば、硅素鋼板を
枠型に積層し、かつその層の厚さ方向で２分割す
るよう形成した一対の枠状の外鉄心を設け、非磁
性体の軸に帯状の硅素鋼板を巻き付け成形し、そ
の軸方向の１ケ所にすり割りを設けた内鉄心を設
け、前記一対の外鉄心の接合面内の相対峠する枠
中央部分に前記軸が挿通されるよう設けた回転軸
用穴と、この回転軸用穴に挿通された軸を前記内
鉄心がその両端面を外鉄心の枠内面で自由に回転
するように支持した軸受を設けるようにしている
ため、非接触式で電力、又は電気信号を効率よく
伝達出来、しかも安価に製作することが出来る効
果がある。[Effects of the invention] As explained above, according to this invention, silicon steel plate is laminated into a frame shape and a pair of frame-shaped outer cores are formed so as to be divided in two in the thickness direction of the layers, an inner core is formed by wrapping a band-shaped silicon steel plate around a non-magnetic shaft and providing a slot in one place in the axial direction, a rotating shaft hole is provided in the frame central part where the relative joint surfaces of the pair of outer cores meet so that the shaft can be inserted through it, and bearings are provided in which the inner core supports the shaft inserted into the rotating shaft hole so that both end faces of the shaft can rotate freely inside the frame of the outer core, thereby providing the effect of efficiently transmitting power or electrical signals in a non-contact manner and being able to be manufactured inexpensively.

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

第１図乃至第５図は本考案の一実施例に係り、
第１図は外鉄心及び内鉄心の分解斜視図、第２図
は短冊状に切断した硅素鋼板を示す斜視図、第３
図は第２図の短冊状硅素鋼板を枠状に組立た斜視
図、第４図は積層した一対の枠状の外鉄心を示す
斜視図、第５図は回転変圧の鉄心構造の組立斜視
図である。 １……短冊状硅素鋼板、２……回転軸用穴、３
……外鉄心、４……枠状に打抜いた硅素鋼板、５
……軸、６……内鉄心、７……すり割り、８……
軸受。 1 to 5 relate to an embodiment of the present invention,
Figure 1 is an exploded perspective view of the outer core and inner core, Figure 2 is a perspective view showing a silicon steel plate cut into strips, and Figure 3 is an exploded perspective view of the outer core and inner core.
The figure is a perspective view of the rectangular silicon steel plates in Figure 2 assembled into a frame shape, Figure 4 is a perspective view showing a pair of laminated frame-shaped outer cores, and Figure 5 is an assembled perspective view of the core structure of a rotary transformer. It is. 1...Strip-shaped silicon steel plate, 2...Rotating shaft hole, 3
... Outer iron core, 4 ... Silicon steel plate punched into a frame shape, 5
...Shaft, 6...Inner core, 7...Slot, 8...
bearing.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 硅素鋼板を短冊状に切断して枠型にしたもの又
は硅素鋼板を枠状に打抜いたものを、積層し、か
つその層の厚さ方向で２分割するよう形成した一
対の枠状の外鉄心と、非磁性体の軸に前記外鉄心
の枠内寸法よりやや狭い幅の帯状の硅素鋼板を巻
き付け成形し、その軸方向の１ケ所にすり割りを
設けた内鉄心（回転鉄心）と、前記一対の外鉄心
の接合面内の相対峠する枠中央部分に前記軸が挿
通されるよう設けた回転軸用穴と、この回転軸用
穴に挿通された軸を前記内鉄心がその両端面を外
鉄心の枠内面に対峠して該枠内で自由に回転する
ように支持した軸受とからなることを特徴とする
回転変圧器の鉄心構造。 A pair of frame-shaped outer parts made by laminating silicon steel plates cut into strips to form frames or punching silicon steel plates into frame shapes, and dividing the layers into two in the thickness direction. an inner core (rotating core) in which a band-shaped silicon steel plate having a width slightly narrower than the inner frame dimension of the outer core is wound and formed around an iron core and a non-magnetic shaft, and a slot is provided at one location in the axial direction; A rotary shaft hole is provided in the center portion of the frame where the pair of outer cores meet relative to each other, and the shaft is inserted through the rotary shaft hole. 1. An iron core structure for a rotary transformer, comprising: a bearing supported on an inner surface of a frame of an outer iron core so as to freely rotate within the frame.