JPH0367327B2 - - Google Patents
Info
- Publication number
- JPH0367327B2 JPH0367327B2 JP57116287A JP11628782A JPH0367327B2 JP H0367327 B2 JPH0367327 B2 JP H0367327B2 JP 57116287 A JP57116287 A JP 57116287A JP 11628782 A JP11628782 A JP 11628782A JP H0367327 B2 JPH0367327 B2 JP H0367327B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- ferrite
- stator
- rotor
- 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.)
- Expired - Lifetime
Links
- 229910000859 α-Fe Inorganic materials 0.000 claims description 25
- 239000000696 magnetic material Substances 0.000 claims description 9
- 230000035699 permeability Effects 0.000 claims description 9
- 238000004804 winding Methods 0.000 description 9
- 239000000843 powder Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000010304 firing Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 229910017518 Cu Zn Inorganic materials 0.000 description 1
- 229910017752 Cu-Zn Inorganic materials 0.000 description 1
- 229910017943 Cu—Zn Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/18—Rotary transformers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
Description
【発明の詳細な説明】
本発明はロータリートランスに関し、特に複数
チヤンネル間のクロストークを減じたロータリー
トランスに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary transformer, and more particularly to a rotary transformer that reduces crosstalk between multiple channels.
ロータリートランスは回転部分と静止部分とを
有する回路の間で信号の授受を行うために広く使
用されており、例えば回転体に取付けたセンサと
静止回路との間、或いはビデオレコーダにおける
回転ヘツドと静止した増幅回路との間の信号伝達
など、制御・測定・記録再生などに使用されてい
る。このようなロータリートランスにおいて、複
数個のセンサを用いる場合には、これらの個数に
対応した個数巻線をロータ及びステータにそれぞ
れ施して、対応した対間に電磁結合を行わせる必
要がある。ロータやステータは一般に高透磁率の
磁性体から製作されるから、従来のロータリート
ランスでは隣接チヤンネル間で磁束の鎖交が避け
られず、クロストークの原因となつた。本発明者
等は、最近磁性体をチヤンネル毎に分割配置し、
それらの間に非磁性体を詰めることによりクロス
トークを防止することを提案した。しかし、この
方法によると一体性が高くて機械強度が高いロー
タやステータを提供することができない。 Rotary transformers are widely used to send and receive signals between circuits that have a rotating part and a stationary part, such as between a sensor attached to a rotating body and a stationary circuit, or between a rotating head and a stationary part in a video recorder. It is used for control, measurement, recording and playback, etc., as well as signal transmission to and from amplifier circuits. In such a rotary transformer, when a plurality of sensors are used, it is necessary to provide windings corresponding to the number of sensors on the rotor and stator, respectively, and to perform electromagnetic coupling between the corresponding pairs. Since the rotor and stator are generally made of a magnetic material with high magnetic permeability, conventional rotary transformers cannot avoid magnetic flux linkage between adjacent channels, causing crosstalk. The present inventors have recently divided and arranged magnetic materials for each channel,
We proposed to prevent crosstalk by filling non-magnetic material between them. However, according to this method, it is not possible to provide a rotor or stator with high integrity and high mechanical strength.
本発明は磁性体を高透磁率の焼結フエライトか
ら構成し、それらの間に介在するシールド用の非
磁性体を使用温度において非磁性の焼結フエライ
トから構成することにより、上記の問題を解決す
る。本発明によると、非磁性及び磁性のフエライ
ト粉末の各々の混練物を成形し、これらを仮結合
した上で一緒に焼成し、互に一体化した焼結体と
することができ、焼成時の収縮差による割れや歪
の問題もなく、完成品の機械強度の問題もないロ
ータ及びステータより成るロータリートランスが
提供できる。 The present invention solves the above problem by constructing the magnetic body from sintered ferrite with high magnetic permeability, and by constructing the non-magnetic shielding material interposed between them from sintered ferrite which is non-magnetic at the operating temperature. do. According to the present invention, a kneaded product of non-magnetic and magnetic ferrite powders is molded, they are temporarily bonded, and then fired together to form a mutually integrated sintered body. A rotary transformer consisting of a rotor and a stator can be provided without problems of cracking or distortion due to differential shrinkage, and without problems with the mechanical strength of the finished product.
以下、図面を参照して本発明の実施例を詳しく
説明する。 Embodiments of the present invention will be described in detail below with reference to the drawings.
本発明において、非磁性体とは使用温度におい
て実質的に非磁性のフエライト（MO・Fe2O3で
表わされるもの。ここにＭは金属である）から選
択されるもので、厳密には磁性体の一種でありう
る。第１図は或る２種のフエライトの透磁率の温
度依存性を示し、Ａは本発明で使用できる非磁性
フエライトであり、Ｂは通常のフエライトであ
る。フエライトＡは低温で高い透磁率を示すが、
常温前後やそれよりも高い温度で透磁率が非常に
低い。例えばCu−Zn系フエライトにおいて金属
の配合比を選択すれば常温で非磁性のものや、大
きな透磁率を有するものが得られる。 In the present invention, the non-magnetic material is selected from ferrite (represented by MO.Fe 2 O 3 , where M is a metal) which is substantially non-magnetic at the operating temperature, and strictly speaking, it is non-magnetic. It can be a type of body. FIG. 1 shows the temperature dependence of the magnetic permeability of two types of ferrites, A is a non-magnetic ferrite that can be used in the present invention, and B is a normal ferrite. Ferrite A exhibits high magnetic permeability at low temperatures,
Magnetic permeability is very low at around room temperature or higher temperatures. For example, by selecting the mixing ratio of metals in Cu-Zn ferrite, it is possible to obtain non-magnetic material at room temperature or material with high magnetic permeability.
第２図は本発明の第１実施例による円板形ロー
タリートランスの断面図である。ロータ１、ステ
ータ２は実質的に同一の構成を有する。ロータ１
には回転軸用の取付孔６が、ステータ２には支持
体用の取付孔７が形成されている。ロータ１は少
くとも使用温度（常温以上）で非磁性のフエライ
ト粉末の焼結体より成る円板３を含み、その一部
は環状の突出部８を有し、これが非磁性のシール
ドとして役立つ。基板３の面には２個の環状の高
透磁率フエライト焼結体４1，４2が合着されてお
り、さらにこれらフエライト焼結体の面には巻線
９1，９2が結合されている。ステータ２も同様に
環状突出部１０を有する非磁性体円板１１、その
表面の環状磁性フエライト焼結体１２1，１２2、
及びこれら焼結体の表面に結合された巻線１３1，
１３2より構成されている。 FIG. 2 is a sectional view of a disc-shaped rotary transformer according to a first embodiment of the present invention. The rotor 1 and stator 2 have substantially the same configuration. Rotor 1
A mounting hole 6 for a rotating shaft is formed in the stator 2, and a mounting hole 7 for a support body is formed in the stator 2. The rotor 1 includes a disk 3 made of a sintered body of ferrite powder that is nonmagnetic at least at operating temperatures (above room temperature), and a portion of the disk 3 has an annular protrusion 8, which serves as a nonmagnetic shield. Two annular high-permeability ferrite sintered bodies 4 1 and 4 2 are bonded to the surface of the substrate 3, and windings 9 1 and 9 2 are bonded to the surfaces of these ferrite sintered bodies. ing. Similarly, the stator 2 also includes a non-magnetic disc 11 having an annular protrusion 10, an annular magnetic ferrite sintered body 12 1 , 12 2 on the surface thereof,
and a winding 13 1 bonded to the surface of these sintered bodies,
It is composed of 13 2 .
ロータ１は、例えば非磁性フエライトの粉末及
び磁性フエライトの粉末に適宜のバインダー及び
水を加えて混練りし、それぞれ所定の金型で成形
し、それを第２図に形に結合してプレスし、次で
高温で焼成することにより非磁性体円板３と磁性
体４1，４2の一体焼結体とすることで製造しう
る。巻線９1，９2はAg、Ag−Pd、Pd等の金属粉
末のペーストを磁性体４1，４2の表面に渦巻パタ
ーンとして印刷し、焼成して焼付けることができ
る。或いは上記焼結体の焼成前に同様な印刷を
し、全体を一緒に焼成しても良い。別法として絶
縁導線を接着剤で磁性体４1，４2の面に結合して
も良い。ステータ２の製造も同様に実施しうる。 The rotor 1 is made by, for example, adding a suitable binder and water to non-magnetic ferrite powder and magnetic ferrite powder, kneading them, molding them in predetermined molds, joining them into the shape shown in Fig. 2, and pressing them. , and then firing at a high temperature to form an integral sintered body of the non-magnetic disc 3 and the magnetic bodies 4 1 and 4 2 . The windings 9 1 and 9 2 can be formed by printing a spiral pattern of metal powder paste such as Ag, Ag-Pd, or Pd on the surfaces of the magnetic bodies 4 1 and 4 2 and firing the paste. Alternatively, a similar printing may be performed before firing the sintered body, and the entire body may be fired together. Alternatively, insulated conductive wires may be bonded to the surfaces of the magnetic bodies 4 1 and 4 2 with adhesive. The production of the stator 2 can be carried out in a similar manner.
第３図は本発明の第２実施例による同軸型に構
成したロータリートランスを示す。ロータ１４は
環状体であり、ステータ１５はロータ１４の内周
面に近接して同軸配置されている。ロータ１４は
図示しないベアリング手段で例えばステータの孔
１７に固定された軸に回転自在に支持されてい
る。ロータ１４は各チヤンネルを受持つ磁性の環
状小フエライト焼結体１８1，１８2とそれらを分
離する少くとも使用温度で非磁性のフエライトリ
ング１９とより成り、また焼結体１８1，１８2の
内周面には周溝が切られていてその中に巻線２０
１，２０2がそれぞれ固着されている。ステータ１
５も同様に、磁性の環状小フエライト焼結体２１
１，２１2、非磁性フエライト焼結体リング２２、
及び焼結体２１1，２１2の外周面の周溝にそれぞ
れ保持された巻線２３1，２３2より構成されてい
る。本例のロータリートランスの製造方法も第１
例と同様であり、磁性及び非磁性フエライトを一
緒に焼結するものである。 FIG. 3 shows a coaxial rotary transformer according to a second embodiment of the present invention. The rotor 14 is an annular body, and the stator 15 is coaxially arranged close to the inner peripheral surface of the rotor 14. The rotor 14 is rotatably supported by bearing means (not shown), for example, on a shaft fixed in a hole 17 of the stator. The rotor 14 consists of magnetic annular small ferrite sintered bodies 18 1 , 18 2 that take charge of each channel, and a ferrite ring 19 that is non-magnetic at least at the operating temperature to separate them, and sintered bodies 18 1 , 18 2 A circumferential groove is cut on the inner circumferential surface of the
1 and 20 2 are fixed respectively. Stator 1
Similarly, 5 is a magnetic annular small ferrite sintered body 21
1 , 21 2 , non-magnetic ferrite sintered ring 22,
and windings 23 1 and 23 2 held in circumferential grooves on the outer peripheral surfaces of sintered bodies 21 1 and 21 2 , respectively. The manufacturing method of the rotary transformer of this example is also the first method.
Similar to the example, magnetic and non-magnetic ferrite are sintered together.
以上のように構成したから、同種のスピネル結
晶構想同志の焼結合体は熱収縮、熱歪による影響
を受け難いのみならず、相互に強固に結合してす
ぐれた機械特性のロータ及びステータを得ること
ができる。しかも非磁性部分が磁性部分を分離す
るため、チヤンネル間のシールドが完全になつて
クロストークが減じる。 With the structure described above, the sintered bodies of the same type of spinel crystal concept are not only hardly affected by thermal contraction and thermal distortion, but also are strongly bonded to each other to obtain a rotor and stator with excellent mechanical properties. be able to. Moreover, since the non-magnetic part separates the magnetic part, the shielding between channels is complete and crosstalk is reduced.
本発明の範囲で多くの変形例が可能なことは当
業者には明らかであろう。例えば、第２図の例に
おいて、非磁性体突起の部分だけを残して非磁性
体円板を他の磁器円板や非磁性金属板に代置する
ことも可能である。また第３図の例において、磁
性体１８1，１８2を巻線２３1，２３2を通る水平
面で分割した形の素要素を積層するようにすれば
巻線を行うことが容易になる。 It will be apparent to those skilled in the art that many variations are possible within the scope of the invention. For example, in the example shown in FIG. 2, it is also possible to leave only the non-magnetic protrusions and replace the non-magnetic disk with another ceramic disk or a non-magnetic metal plate. Further, in the example shown in FIG. 3, winding can be easily performed by laminating elementary elements in which the magnetic bodies 18 1 and 18 2 are divided along a horizontal plane passing through the windings 23 1 and 23 2 .
第１図は本発明で使用する非磁性体の透磁率の
温度依存性を示すグラフ、第２図は本発明の第１
実施例のロータリートランスの縦断面図、及び第
３図は本発明の第２実施例のロータリートランス
の縦断面図である。図中主な部分は次の通りであ
る。
１：ロータ、２：ステータ、３，１１：非磁性
フエライト円板、８，１０：非磁性フエライト環
状突起、４1，４2：磁性フエライト、９1，９2，
１３1，１３2：巻線、１４：ロータ、１５：ステ
ータ、１８1，１８2，２１1，２１2：磁性フエラ
イト、１９，２２：非磁性リング、２０1，２０
２，２３1，２３2：巻線。
Figure 1 is a graph showing the temperature dependence of magnetic permeability of the non-magnetic material used in the present invention, and Figure 2 is a graph showing the temperature dependence of the magnetic permeability of the non-magnetic material used in the present invention.
FIG. 3 is a vertical cross-sectional view of a rotary transformer according to a second embodiment of the present invention. The main parts in the figure are as follows. 1: Rotor, 2: Stator, 3, 11: Non-magnetic ferrite disk, 8, 10: Non-magnetic ferrite annular projection, 4 1 , 4 2 : Magnetic ferrite, 9 1 , 9 2 ,
13 1 , 13 2 : Winding wire, 14 : Rotor, 15 : Stator, 18 1 , 18 2 , 21 1 , 21 2 : Magnetic ferrite, 19, 22 : Non-magnetic ring, 20 1 , 20
2 , 23 1 , 23 2 : Winding wire.
Claims (1)
を非磁性体層を介在させて結合し、前記各磁性体
の表面に巻線を施して成る部材を一対用意し、両
部材の磁性体の表面を互に対向させて相対回転自
在としたロータリートランスにおいて、前記複数
の磁性体をフエライトから構成し、前記非磁性体
を少くとも使用温度においてほぼ非磁性のフエラ
イトから構成し、これらを一体焼結したことを特
徴とするロータリートランス。1. A pair of members is prepared in which a number of high permeability magnetic materials corresponding to the number of channels are bonded with a non-magnetic layer interposed therebetween, and a wire is wound on the surface of each of the magnetic materials. In a rotary transformer whose surfaces face each other and can rotate freely, the plurality of magnetic bodies are composed of ferrite, the non-magnetic body is composed of ferrite which is substantially non-magnetic at least at the operating temperature, and these are integrally sintered. A rotary transformer that is characterized by being connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57116287A JPS598306A (en) | 1982-07-06 | 1982-07-06 | Rotary transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57116287A JPS598306A (en) | 1982-07-06 | 1982-07-06 | Rotary transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS598306A JPS598306A (en) | 1984-01-17 |
| JPH0367327B2 true JPH0367327B2 (en) | 1991-10-22 |
Family
ID=14683316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57116287A Granted JPS598306A (en) | 1982-07-06 | 1982-07-06 | Rotary transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS598306A (en) |
-
1982
- 1982-07-06 JP JP57116287A patent/JPS598306A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS598306A (en) | 1984-01-17 |
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