JPH03211708A - Rotary transformer - Google Patents
Rotary transformerInfo
- Publication number
- JPH03211708A JPH03211708A JP2006605A JP660590A JPH03211708A JP H03211708 A JPH03211708 A JP H03211708A JP 2006605 A JP2006605 A JP 2006605A JP 660590 A JP660590 A JP 660590A JP H03211708 A JPH03211708 A JP H03211708A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder side
- magnetic
- section
- magnetic body
- rotary transformer
- 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
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、互いに相対回転するものの信号伝達（２） に用いるロータリートランスに関するものである。[Detailed description of the invention] Industrial applications The present invention provides signal transmission between objects that rotate relative to each other (2) This relates to rotary transformers used in
従来の技術
第８図、第９図は、従来のロータリートランスまの構成
を示すものである。第８図は上面図、第９図は断面図で
ある。第８図、第９図において、１は内筒側磁性体で、
その外周溝にコイル３が巻線されている。２は外筒側磁
性体で内筒側磁性体の巻線溝と対向する位置に内周溝が
形成され、コイル４が巻線されている。内筒側磁性体１
及び外筒側磁性体２は、それぞれ一体のものであり、円
周方向に対して電気・磁気的に連続した円筒状磁性体の
構成にしている。BACKGROUND ART FIGS. 8 and 9 show the structure of a conventional rotary transformer. FIG. 8 is a top view, and FIG. 9 is a sectional view. In FIGS. 8 and 9, 1 is a magnetic body on the inner cylinder side,
A coil 3 is wound around the outer circumferential groove. Reference numeral 2 denotes an outer cylinder side magnetic body, and an inner peripheral groove is formed at a position facing the winding groove of the inner cylinder side magnetic body, and a coil 4 is wound therein. Inner cylinder side magnetic body 1
and the outer cylinder side magnetic body 2 are each integral, and have a configuration of a cylindrical magnetic body that is electrically and magnetically continuous in the circumferential direction.
発明が解決しようとする課題
しかしながら、上記従来の構成では、磁性体が円周方向
に対して連続しているため、第１０図に示すようにうず
電流が大きくなり、損失を生じる原因となる。また、こ
のうず電流は、周波数の上昇とともに、増大するため、
高周波帯域で特性を劣化させる大きな要因となり、ビデ
オテーブレコーダー等における高画質化技術に支障をき
たすという問題点を有していた。Problems to be Solved by the Invention However, in the conventional configuration described above, since the magnetic body is continuous in the circumferential direction, eddy current increases as shown in FIG. 10, causing loss. Also, this eddy current increases as the frequency increases, so
This poses a problem in that it becomes a major factor in deteriorating characteristics in high-frequency bands, and interferes with technology for improving image quality in video recorders and the like.
本発明は上記従来の問題点を解決するもので、うず電流
を大幅に削減し、損失を少なくすることにより、より高
周波帯域まで使用できるロータリートランスを提供する
ことを目的とする。The present invention solves the above conventional problems, and aims to provide a rotary transformer that can be used up to a higher frequency band by significantly reducing eddy current and reducing loss.
課題を解決するための手段
この課題を解決するために本発明のロータリートランス
は、内筒側磁性体及び外筒側磁性体の少なくともいずれ
か一方の磁性体を断面円弧状の複数個の磁性片により組
合せてなる構成にしたものである。Means for Solving the Problem In order to solve this problem, the rotary transformer of the present invention includes a plurality of magnetic pieces having an arc-shaped cross section, at least one of the inner cylinder side magnetic body and the outer cylinder side magnetic body. The configuration is made by combining the following.
作用
この構成により、磁性体が円周方向に対して不連続とな
るため、電気・磁気的にも不連続となり、全体として流
れるうず電流を大幅に削減することができる。この結果
、より高周波帯域まで使用できるようになり、ビデオテ
ープレコーダーにおける高画質化技術に対応できるなど
優れたロータリートランスを得ることができる。Effect: With this configuration, the magnetic material is discontinuous in the circumferential direction, so it is electrically and magnetically discontinuous, and the eddy current flowing as a whole can be significantly reduced. As a result, it is possible to obtain an excellent rotary transformer that can be used up to a higher frequency band and is compatible with high image quality technology in video tape recorders.
実施例
以下、本発明の一実施例について、図面を参照しながら
説明する。EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.
第１図、第２図は、本発明の第１の実施例におけるロー
タリートランスの構成を示すものである。1 and 2 show the configuration of a rotary transformer in a first embodiment of the present invention.
第１図は上面図、第２図は断面図である。FIG. 1 is a top view, and FIG. 2 is a sectional view.
第１図、第２図において、６は内筒側断面円弧状磁性片
、７は外筒側断面円弧状磁性片で、それぞれに内筒側保
持体８及び外筒側保持体９により複数個一定の間隔をも
ってほぼ円筒を形成するように保持されている。さらに
、対向する周溝には、それぞれ内筒側巻線コイル３及び
外筒側巻線コイル４が巻線されている。In FIGS. 1 and 2, 6 is a magnetic piece with an arcuate cross section on the inner cylinder side, and 7 is a magnetic piece with an arcuate cross section on the outer cylinder side. They are held at regular intervals so as to form a substantially cylindrical shape. Further, an inner cylinder side winding coil 3 and an outer cylinder side winding coil 4 are wound in the opposing circumferential grooves, respectively.
以上のように構成されたロータリートランスについて、
以下その動作を説明する。Regarding the rotary transformer configured as above,
The operation will be explained below.
ここでは、内筒側断面円弧状磁性片６からなる磁性体に
巻線した内筒側磁性体について述べる。Here, the inner cylinder side magnetic body wound around the magnetic body consisting of the magnetic piece 6 having an arcuate cross section on the inner cylinder side will be described.
第１０図は、従来のロータリートランスにおけるうず電
流の発生状態を模式的に示したものであり、第７図は、
本発明の構成によろうず電流の発生状態を模式的に示し
たものである。Figure 10 schematically shows the state of eddy current generation in a conventional rotary transformer, and Figure 7 shows the following:
2 is a diagram schematically showing a state in which a wax current is generated according to the configuration of the present invention.
本発明の構成により、発生するうず電流１０ａは、断面
円弧状の磁性片６内でのみ回転するようになり、この結
果、従来のロータリートランスのうず電流１０ｂに比べ
、全体として流れるうず電流が大幅に少なくなる。これ
により、第１１図に示すように、使用できる周波数域が
実線で示す従来例に比べ、破線で示す本発明のロータリ
ートランスはより高帯域化できるようになる。With the configuration of the present invention, the generated eddy current 10a rotates only within the magnetic piece 6 having an arc-shaped cross section, and as a result, the eddy current flowing as a whole is significantly larger than the eddy current 10b of a conventional rotary transformer. becomes less. As a result, as shown in FIG. 11, the rotary transformer of the present invention, which is indicated by the broken line, can have a higher frequency range than the conventional example, whose usable frequency range is indicated by the solid line.
外筒側磁性体の動作については、内筒側磁性体の動作と
同じであるため、省略する。The operation of the outer cylinder side magnetic body is the same as that of the inner cylinder side magnetic body, so a description thereof will be omitted.
以上のように本実施例によれば、内筒側円筒磁性体及び
外筒側円筒磁性体をそれぞれ断面円弧状の磁性片を組合
せて構成したことにより、相方向にうず電流の少ないロ
ータリートランスを得ることができる。As described above, according to this embodiment, the inner cylinder side cylindrical magnetic body and the outer cylinder side cylindrical magnetic body are constructed by combining magnetic pieces each having an arcuate cross section, thereby creating a rotary transformer with less eddy current in the phase direction. Obtainable.
以下、本発明の第２．第３の実施例について説明する。Hereinafter, the second aspect of the present invention. A third example will be described.
本発明の第１の実施例では、内筒側磁性体及び外筒側磁
性体の両方を断面円弧状の磁性片より構成したが、内筒
側磁性体及び外筒側磁性体のいずれか一方を断面円弧状
の磁性片の組合せとし、片側は円筒状磁性体を用いても
効果がある。In the first embodiment of the present invention, both the inner cylinder side magnetic body and the outer cylinder side magnetic body are composed of magnetic pieces having an arc-shaped cross section, but either the inner cylinder side magnetic body or the outer cylinder side magnetic body is It is also effective to use a combination of magnetic pieces with an arcuate cross section and a cylindrical magnetic body on one side.
第３図、第４図は内筒側磁性体のみを断面円弧状の磁性
片６より構成した内筒側磁性体７′を円筒状とした第２
の実施例であり、第５図、第６図は外筒側磁性体のみを
断面円弧状の磁性片７より構成し内筒側磁性体６′を円
筒状とした第３の実施例である。Figures 3 and 4 show a second magnetic body in which only the inner cylinder side magnetic body is composed of a magnetic piece 6 having an arcuate cross section, and the inner cylinder side magnetic body 7' is cylindrical.
Figures 5 and 6 show a third embodiment in which only the outer cylinder side magnetic body is composed of a magnetic piece 7 having an arcuate cross section, and the inner cylinder side magnetic body 6' is cylindrical. .
第２．第３の実施例の動作については、第１の実施例の
場合と同様である。Second. The operation of the third embodiment is similar to that of the first embodiment.
なお、本実施例では、４つの断面円弧状の磁性片より構
成した図としているが、これは必要に応じいくつであっ
てもよい。Although the present embodiment is illustrated as being composed of four magnetic pieces each having an arcuate cross section, the number of magnetic pieces may be any number as required.
発明の効果
以上のように本発明は、内筒側磁性体と外筒側磁性体の
少なくともいずれか一方の磁性体を断面円弧状の複数個
の磁性片を組合せた構成にしたことにより、うず電流の
少ない、より高周波帯域まで使用できる優れたロータリ
ートランスを実現できるものである。Effects of the Invention As described above, the present invention has a configuration in which at least one of the magnetic body on the inner cylinder side and the magnetic body on the outer cylinder side is composed of a combination of a plurality of magnetic pieces having an arcuate cross section. This makes it possible to create an excellent rotary transformer that requires less current and can be used up to higher frequency bands.
さらに、本発明の構成によれば、次のような効果も奏す
る。すなわち、従来の構成では、第８図で示しているコ
イルの配線引出し用の縦溝５を加工する必要があったが
、本発明の構成によれば、断面円弧状の磁性片と磁性片
の間がそのままコイルの配線引出し用の溝として使用す
ることができるため、加工が不要となるような効果も奏
する。Furthermore, according to the configuration of the present invention, the following effects are also achieved. That is, in the conventional configuration, it was necessary to process the vertical groove 5 for drawing out the wiring of the coil shown in FIG. Since the gap can be used as it is as a groove for drawing out the coil wiring, there is also an effect that no machining is required.
第１図、第２図は本発明の第１の実施例におけるロータ
リートランスの上面図と断面図、第３図、第４図は本発
明の第２の実施例におけるロータリートランスの上面図
と断面図、第５図、第６図は本発明の第３の実施例にお
けるロータリートランスの上面図と断面図、第７図は本
発明の一実施例におけるロータリートランスのうず電流
の発生を示した斜視図、第８図、第９図は従来例のロー
タリートランスの上面図と断面図、第１０図は従来のロ
ータリートランスのうず電流の発生を示した斜視図、第
１１図は従来のロータリートランスと本発明のロータリ
ートランスの周波数特性を比較した特性図である。
３・・・・・・内筒側巻線コイル、４・・・・・・外筒
側巻線コイル、６・・・・・・内筒側断面円弧状磁性片
、７・・・・・・外筒側断面円弧状磁性片、８・・・・
・・内筒側保持体、９・・・・・・外筒側保持体、１０
ａ・・・・・・うず電流。1 and 2 are a top view and a sectional view of a rotary transformer according to a first embodiment of the present invention, and FIGS. 3 and 4 are a top view and a sectional view of a rotary transformer according to a second embodiment of the present invention. 5 and 6 are top views and sectional views of a rotary transformer according to a third embodiment of the present invention, and FIG. 7 is a perspective view showing the generation of eddy current in a rotary transformer according to an embodiment of the present invention. 8 and 9 are a top view and a sectional view of a conventional rotary transformer, FIG. 10 is a perspective view showing the generation of eddy current in a conventional rotary transformer, and FIG. 11 is a conventional rotary transformer and a cross-sectional view. FIG. 3 is a characteristic diagram comparing the frequency characteristics of the rotary transformer of the present invention. 3...Inner cylinder side winding coil, 4...Outer cylinder side winding coil, 6...Inner cylinder side circular arc-shaped magnetic piece, 7...・Outer cylinder side cross-section arc-shaped magnetic piece, 8...
...Inner cylinder side holding body, 9...Outer cylinder side holding body, 10
a...Eddy current.
Claims (2)
、前記内筒側磁性体の巻線溝と対向する内周面に巻線溝
を形成した円筒状の外筒側磁性体を備え、この内筒側磁
性体と外筒側磁性体の少なくともいずれか一方の磁性体
を断面円弧状の複数個の磁性片を組合せて構成するとと
もに、その複数個の磁性片を、その対向面とは反対側に
配設される円筒型の保持体により保持し、かつ上記各磁
性体の巻線溝に巻線を施してなるロータリートランス。(1) A cylindrical inner cylinder side magnetic body having a winding groove on its outer circumferential surface, and a cylindrical outer cylinder side having a winding groove formed on its inner circumferential surface facing the winding groove of the inner cylinder side magnetic body. A magnetic material is provided, and at least one of the magnetic material on the inner cylinder side and the magnetic material on the outer cylinder side is configured by combining a plurality of magnetic pieces having an arc-shaped cross section, and the plurality of magnetic pieces are A rotary transformer that is held by a cylindrical holding body disposed on the opposite side of the opposing surface, and in which wires are wound in the winding grooves of each of the magnetic bodies.
弧状の複数個の磁性片を組合せて構成した請求項（１）
記載のロータリートランス。(2) Claim (1) in which both the inner cylinder side magnetic body and the outer cylinder side magnetic body are constructed by combining a plurality of magnetic pieces having an arcuate cross section.
Rotary transformer as described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006605A JPH0821510B2 (en) | 1990-01-16 | 1990-01-16 | Rotary transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006605A JPH0821510B2 (en) | 1990-01-16 | 1990-01-16 | Rotary transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03211708A true JPH03211708A (en) | 1991-09-17 |
| JPH0821510B2 JPH0821510B2 (en) | 1996-03-04 |
Family
ID=11642976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2006605A Expired - Lifetime JPH0821510B2 (en) | 1990-01-16 | 1990-01-16 | Rotary transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0821510B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011064377A1 (en) * | 2009-11-30 | 2011-06-03 | Hispano - Suiza | Easily installed rotary transformer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01175709A (en) * | 1987-12-29 | 1989-07-12 | Matsushita Electric Ind Co Ltd | Rotary transformer |
-
1990
- 1990-01-16 JP JP2006605A patent/JPH0821510B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01175709A (en) * | 1987-12-29 | 1989-07-12 | Matsushita Electric Ind Co Ltd | Rotary transformer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011064377A1 (en) * | 2009-11-30 | 2011-06-03 | Hispano - Suiza | Easily installed rotary transformer |
| FR2953321A1 (en) * | 2009-11-30 | 2011-06-03 | Hispano Suiza Sa | ROTATING TRANSFORMER WITH EASY INSTALLATION |
| CN102640235A (en) * | 2009-11-30 | 2012-08-15 | 伊斯帕诺-絮扎公司 | Easily installed rotary transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0821510B2 (en) | 1996-03-04 |
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