JP2002008921A - Method for magnetizing permanent magnet - Google Patents
Method for magnetizing permanent magnetInfo
- Publication number
- JP2002008921A JP2002008921A JP2000184871A JP2000184871A JP2002008921A JP 2002008921 A JP2002008921 A JP 2002008921A JP 2000184871 A JP2000184871 A JP 2000184871A JP 2000184871 A JP2000184871 A JP 2000184871A JP 2002008921 A JP2002008921 A JP 2002008921A
- Authority
- JP
- Japan
- Prior art keywords
- magnetized
- magnetizing
- magnet
- outer peripheral
- peripheral surface
- 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.)
- Withdrawn
Links
Landscapes
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、位置センサー、リ
ニアモータ、磁気軸受等に使用される半径方向に磁化さ
れた円筒状磁石を得るように着磁するための永久磁石の
着磁方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of magnetizing a permanent magnet for obtaining a radially magnetized cylindrical magnet used for a position sensor, a linear motor, a magnetic bearing, and the like. It is.
【０００２】[0002]
【従来の技術】従来、半径方向に磁化された円筒状磁石
を得るように着磁するための着磁装置として、例えば特
公昭５８−１４０５５号公報、特開昭５８−１０７６１
１号公報や特開平２−１５６６１０号公報が開示されて
いる。すなわち、特公昭５８−１４０５５号公報のよう
に、着磁すべき円筒状磁石材料の内周面全面に接し該磁
石材料の内部に嵌る軸状部分と、該磁石材料の外周面全
面に接し該外周面を覆う筒状部分とが、上記磁石材料の
端面全周に隣接して形成され少なくとも該磁石材料の厚
さと同じ半径方向の幅を有し内部にコイルが巻回収容さ
れた環状空所を包囲する部分と一体となり、上記磁石材
料とにより上記コイルの閉磁気回路を構成するようにし
た継鉄を有することを特徴とする着磁装置にある。2. Description of the Related Art Conventionally, as a magnetizing device for magnetizing so as to obtain a cylindrical magnet magnetized in a radial direction, for example, Japanese Patent Publication No. 58-14055 and Japanese Patent Application Laid-Open No. 58-10761.
No. 1 and JP-A-2-156610 are disclosed. That is, as disclosed in Japanese Patent Publication No. 58-14055, a shaft portion that contacts the entire inner peripheral surface of the cylindrical magnet material to be magnetized and fits inside the magnetic material, and the shaft portion that contacts the entire outer peripheral surface of the magnet material. A tubular portion covering the outer peripheral surface, an annular space formed adjacent to the entire end surface of the magnet material, having a radial width at least equal to the thickness of the magnet material, and having a coil wound therein; The magnetizing device is characterized in that it has a yoke that is integrated with a portion surrounding the coil and forms a closed magnetic circuit of the coil with the magnet material.
【０００３】また、特開昭５８−１０７６１１号公報
は、磁気ディスク装置の磁気ヘッド駆動ポジショナー機
構に主として用いられるボイスコイル型リニヤモータ用
磁気回路として十分な磁気的能力を付与する磁気回路の
組立着磁方法であり、センターポールの外側に所定の間
隔をおいて支持固定された筒状外周ヨークの内側に未着
磁の永久磁石材料を筒状に組合わせて固定した後、該磁
気回路を、前記センターポールの軸線上に位置する一組
の着磁用センターポールと、前記筒状外周ヨークの外周
面に部分的に接触乃至接触する又は複数の着磁用センタ
ーポールとで囲み、前記着磁用センターポールと前記筒
状外周ヨークとの間にヨーク軸方向および／またはヨー
ク周方向の相対運動を行わしめることにより前記磁気回
路を一部分ずつ着磁してゆく磁気回路の組立着磁方法に
ある。Japanese Patent Application Laid-Open No. 58-107611 discloses an assembly magnetizing method of a magnetic circuit for providing a sufficient magnetic ability as a magnetic circuit for a voice coil type linear motor mainly used for a magnetic head drive positioner mechanism of a magnetic disk drive. After fixing a non-magnetized permanent magnet material in a cylindrical shape inside a cylindrical outer peripheral yoke supported and fixed at a predetermined interval outside the center pole, and then fixing the magnetic circuit, A set of magnetizing center poles located on the axis of the center pole and a plurality of magnetizing center poles that partially contact or contact the outer peripheral surface of the cylindrical outer peripheral yoke, The magnetic circuit is magnetized part by part by causing a relative movement in the yoke axial direction and / or the yoke circumferential direction between the center pole and the cylindrical outer yoke. In the assembly wearing magnetizing method of the magnetic circuit Yuku in.
【０００４】さらに、特開平２−１５６６１０号公報
は、中空円筒状の磁石材料を単体で若しくは中空円筒状
に成形したヨークの内周面に固着した状態で、各々横断
面円形のセンターヨークと外周ヨークとによって形成さ
れる横断面円環状の空隙内に嵌着し、前記センターヨー
クに巻装したコイルによる磁界と、センターヨークの磁
石材料と対向する外周面に軸方向に配設した２ｎ個の導
線を端部において交互に接続してなるコイルによる磁界
とにより、部分的に複数回半径方向に着磁する方法およ
びその装置にある。Japanese Patent Application Laid-Open No. 2-156610 discloses a center yoke having a circular cross section and an outer periphery each having a hollow cylindrical magnet material fixed to the inner peripheral surface of a yoke formed alone or in a hollow cylindrical shape. A magnetic field generated by a coil fitted around the center yoke and fitted in an annular space formed by the yoke and having an annular cross section, and 2n pieces of 2n axially disposed on the outer peripheral surface of the center yoke facing the magnet material. A method and an apparatus for partially radially magnetizing a plurality of times in a radial direction by a magnetic field generated by a coil having conductors alternately connected at an end thereof are provided.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上述し
た特許に示すように、リング状磁石において外周Ｎ極、
内周Ｓ極の特殊な着磁を必要とする場合、その着磁装置
は半径方向に磁化された円筒状磁石を得るように着磁す
るためのヨーク（鉄心）を必要とする複雑な構造で高価
なものであると言う問題がある。However, as shown in the above-mentioned patent, a ring-shaped magnet has an outer peripheral N pole,
When special magnetization of the inner south pole is required, the magnetizing device has a complicated structure requiring a yoke (iron core) for magnetizing so as to obtain a cylindrical magnet magnetized in the radial direction. There is a problem that it is expensive.
【０００６】[0006]
【課題を解決するための手段】本発明は、上述したよう
な問題を解消するべく、鋭意開発を進めた結果、ステッ
プ着磁コイルの巻き線の間隔を調整する工夫により非常
に簡単な構造で安価な永久磁石の着磁方法を提供するも
のである。その発明の要旨とするところは、 （１）非磁性材からなるボビンの外周面に被覆銅線を巻
回後、一定の空隙を設け、先の巻回方向と逆方向に巻回
した着磁コイルを使用することにより、半径方向に磁化
された円筒状磁石を得ることを特徴とする永久磁石の着
磁方法。 （２）非磁性材からなるボビンの外周面に被覆銅線を巻
回後、一定の長さを有する円筒状軟磁性ヨークを配置
し、続いて先の巻回方向と逆方向に巻回した着磁コイル
を使用することにより、半径方向に磁化された円筒状磁
石を得ることを特徴とする永久磁石の着磁方法にある。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has been intensively developed and, as a result, has a very simple structure by adjusting the winding interval of the step magnetized coil. It is intended to provide an inexpensive method for magnetizing a permanent magnet. The gist of the invention is as follows: (1) After winding a coated copper wire on the outer peripheral surface of a bobbin made of a non-magnetic material, a certain gap is provided, and the magnetized coil is wound in a direction opposite to the previous winding direction. A method for magnetizing a permanent magnet, comprising obtaining a cylindrical magnet magnetized in a radial direction by using a coil. (2) After winding a coated copper wire around the outer peripheral surface of a bobbin made of a non-magnetic material, a cylindrical soft magnetic yoke having a fixed length is arranged, and then wound in a direction opposite to the previous winding direction. A method for magnetizing a permanent magnet is characterized in that a cylindrical magnet magnetized in a radial direction is obtained by using a magnetizing coil.
【０００７】[0007]
【発明の実施の形態】以下、本発明について図面に従っ
て詳細に説明する。図１は本発明に係る着磁コイルの概
略図である。この図に示すように、非磁性材からなるボ
ビン１の外周面に被覆銅線２を巻回後、一定の空隙ｄ1
を磁化する材料高さの１．５〜２．０倍の長さに設け、
さらに先の巻回方向と逆方向に巻回した着磁コイルを使
用することにより、半径方向に磁化された円筒状磁石を
得るように構成するものである。この空隙ｄ1 の長さ
は、磁化する材料高さの１．５未満では磁石端部に異極
が発生し、また、２．０倍を超えると十分な着磁磁場が
得られないことから、１．５〜２．０倍とした。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic diagram of a magnetized coil according to the present invention. As shown in this figure, after winding a coated copper wire 2 around the outer peripheral surface of a bobbin 1 made of a non-magnetic material, a certain gap d 1
Is provided at a length of 1.5 to 2.0 times the height of the material to be magnetized,
Further, a cylindrical magnet magnetized in the radial direction is obtained by using a magnetized coil wound in a direction opposite to the previous winding direction. If the length of the air gap d 1 is less than 1.5 of the height of the material to be magnetized, a different pole is generated at the end of the magnet. , 1.5 to 2.0 times.
【０００８】図２は本発明に係る他の着磁コイルの概略
図である。この図に示すように、非磁性材からなるボビ
ン１の外周面に被覆銅線２を巻回後、一定の長さｄ2 を
有する円筒状軟磁性ヨーク３を配置し、続いて先の巻回
方向と逆方向に巻回した着磁コイルを使用することによ
り、半径方向に磁化された円筒状磁石を得ることにあ
る。なお、長さｄ2 はｄ1 と同様に、磁化する材料高さ
の１．５〜２．０倍の長さを設ける。しかし、磁化する
材料高さの１．５未満では磁石端部に異極が発生し、ま
た、２．０倍を超えると十分な着磁磁場が得られないか
らである。図３は本発明に係る磁界の状態を示す図であ
る。この図に示すように、非磁性材からなるボビン１の
外周面に被覆銅線２を巻回し、一定の空隙に磁石４を設
置すると、磁界が発生し、内外周着磁が可能となる。FIG. 2 is a schematic view of another magnetizing coil according to the present invention. As shown in this figure, after winding a coated copper wire 2 on the outer peripheral surface of a bobbin 1 made of a non-magnetic material, a cylindrical soft magnetic yoke 3 having a fixed length d 2 is arranged. An object of the present invention is to obtain a cylindrical magnet magnetized in a radial direction by using a magnetized coil wound in a direction opposite to the turning direction. The length d 2, like the d 1, provided 1.5 to 2.0 times the length of the material height of magnetization. However, if the height of the material to be magnetized is less than 1.5, a different pole is generated at the end of the magnet, and if it exceeds 2.0 times, a sufficient magnetizing magnetic field cannot be obtained. FIG. 3 is a diagram showing a state of a magnetic field according to the present invention. As shown in this figure, when a coated copper wire 2 is wound around the outer peripheral surface of a bobbin 1 made of a non-magnetic material, and a magnet 4 is installed in a certain gap, a magnetic field is generated, and the inner and outer magnets can be magnetized.
【０００９】[0009]
【実施例】以下、本発明について実施例により具体的に
説明する。 （実施例１）図１において、ボビン外径：１６．２ｍ
ｍ、内径１５．２ｍｍ、被覆銅線線径：１．２ｍｍ、タ
ーン数各１０ターン、ｄ1 ：１０ｍｍ、磁化する材料と
して軸異方性マンガンアルミ磁石（軸方向磁気特性：４
４ｋＪ／ｍ3 、径方向磁気特性：１０ｋＪ／ｍ3 ）直
径：１５ｍｍ、内径：８ｍｍ、高さ：５ｍｍを図１のｄ
1の中央に精度良くセットし、矢印の方向に８００Ｖ、
２０００Ａ、１０ｍｍＳのパルス電流の結果、外周面長
さ方向の着磁波形はおおよそサイン波となり、その外周
面上の磁束密度分布は外周面中央で約８００Ｇの表面磁
束密度が得られた。EXAMPLES Hereinafter, the present invention will be described specifically with reference to examples. (Embodiment 1) In FIG. 1, the bobbin outer diameter is 16.2 m.
m, inner diameter 15.2 mm, coated copper wire diameter: 1.2 mm, number of turns each 10 turns, d 1 : 10 mm, axially anisotropic manganese aluminum magnet as a magnetizable material (axial magnetic properties: 4
4 kJ / m 3 , radial magnetic property: 10 kJ / m 3 ) Diameter: 15 mm, inner diameter: 8 mm, height: 5 mm
Set accurately in the center of 1 , 800V in the direction of the arrow,
As a result of the pulse current of 2000 A and 10 mmS, the magnetization waveform in the length direction of the outer peripheral surface was substantially a sine wave, and the magnetic flux density distribution on the outer peripheral surface was about 800 G at the center of the outer peripheral surface.
【００１０】（実施例２）磁化する材料は径異方性マン
ガンアルミ磁石（軸方向磁気特性：１６ｋＪ／ｍ 3 、径
方向磁気特性：２８ｋＪ／ｍ3 ）、その他の条件は、実
施例１と同一で行った。その結果、外周面長さ方向の着
磁波形はおおよそサイン波となり、その外周面上の磁束
密度分布は外周面中央で約１２００Ｇの表面磁束密度が
得られた。(Embodiment 2) The material to be magnetized is a radially anisotropic man
Gun aluminum magnet (axial magnetic properties: 16 kJ / m Three, Diameter
Directional magnetic properties: 28 kJ / mThree), Other conditions
Performed in the same manner as in Example 1. As a result, the outer peripheral surface
The magnetic waveform is approximately a sine wave, and the magnetic flux on the outer peripheral surface
The density distribution shows that the surface magnetic flux density of
Obtained.
【００１１】（実施例３）図２において、ｄ2 の区間に
外径φ１９．２ｍｍ、内径φ１６．２ｍｍ、長さ１０ｍ
ｍの軟鉄製リングを配置した。その他の条件は実施例２
と同一条件で行った。その結果、外周面長さ方向の着磁
波形は台形波となり、その外周面上の磁束密度分布は外
周面中央で約１０００Ｇの表面磁束密度が得られた。な
お、実施例において磁化する材料はマンガンアルミ磁石
を用いたが、このマンガンアルミ磁石に限定することな
く、ＮｄＦｅＢ、ＳｍＣｏなどの保磁力の大きい磁石を
除いて、フェライト磁石にも適用することは可能であ
る。(Embodiment 3) In FIG. 2, an outer diameter φ19.2 mm, an inner diameter φ16.2 mm, and a length 10 m in a section d 2 .
m of soft iron rings. Other conditions are the same as those in Example 2.
Performed under the same conditions as As a result, the magnetization waveform in the length direction of the outer peripheral surface was a trapezoidal wave, and the magnetic flux density distribution on the outer peripheral surface was about 1000 G at the center of the outer peripheral surface. In the examples, a manganese aluminum magnet was used as a material to be magnetized. However, the present invention is not limited to this manganese aluminum magnet, and can be applied to ferrite magnets, except for magnets having a large coercive force such as NdFeB and SmCo. It is.
【００１２】[0012]
【発明の効果】以上述べたように、本発明により、非常
に簡単な構造で安価に半径方向に磁化された円筒状磁石
を容易に永久磁石の着磁が可能になった。As described above, according to the present invention, it is possible to easily magnetize a cylindrical magnet magnetized in the radial direction at a low cost with a very simple structure.
【図１】本発明に係る着磁コイルの概略図である。FIG. 1 is a schematic view of a magnetized coil according to the present invention.
【図２】本発明に係る他の着磁コイルの概略図である。FIG. 2 is a schematic view of another magnetized coil according to the present invention.
【図３】本発明に係る磁界の状態を示す図である。FIG. 3 is a diagram showing a state of a magnetic field according to the present invention.
１ ボビン ２ 被覆銅線 ３ 円筒状軟磁性ヨーク ４ 磁石 Reference Signs List 1 bobbin 2 coated copper wire 3 cylindrical soft magnetic yoke 4 magnet
Claims (2)
銅線を巻回後、一定の空隙を設け、先の巻回方向と逆方
向に巻回した着磁コイルを使用することにより、半径方
向に磁化された円筒状磁石を得ることを特徴とする永久
磁石の着磁方法。1. After winding a coated copper wire on an outer peripheral surface of a bobbin made of a non-magnetic material, a predetermined gap is provided, and a magnetized coil wound in a direction opposite to the previous winding direction is used. A method for magnetizing a permanent magnet, comprising obtaining a cylindrical magnet magnetized in a radial direction.
銅線を巻回後、一定の長さを有する円筒状軟磁性ヨーク
を配置し、続いて先の巻回方向と逆方向に巻回した着磁
コイルを使用することにより、半径方向に磁化された円
筒状磁石を得ることを特徴とする永久磁石の着磁方法。2. After winding a coated copper wire on the outer peripheral surface of a bobbin made of a non-magnetic material, a cylindrical soft magnetic yoke having a fixed length is arranged, and then winding in a direction opposite to the previous winding direction. A method for magnetizing a permanent magnet, comprising obtaining a cylindrical magnet magnetized in a radial direction by using a rotated magnetized coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000184871A JP2002008921A (en) | 2000-06-20 | 2000-06-20 | Method for magnetizing permanent magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000184871A JP2002008921A (en) | 2000-06-20 | 2000-06-20 | Method for magnetizing permanent magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002008921A true JP2002008921A (en) | 2002-01-11 |
Family
ID=18685264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000184871A Withdrawn JP2002008921A (en) | 2000-06-20 | 2000-06-20 | Method for magnetizing permanent magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002008921A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012049263A (en) * | 2010-08-25 | 2012-03-08 | Shigeru Tsuchimoto | Multi-pole magnet, manufacturing device for the same, oscillating device, and rotating device |
| CN105989985A (en) * | 2015-03-19 | 2016-10-05 | 阿尔派株式会社 | A magnet, a picking-up device using the magnet and a manufacturing method of the magnet |
-
2000
- 2000-06-20 JP JP2000184871A patent/JP2002008921A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012049263A (en) * | 2010-08-25 | 2012-03-08 | Shigeru Tsuchimoto | Multi-pole magnet, manufacturing device for the same, oscillating device, and rotating device |
| CN105989985A (en) * | 2015-03-19 | 2016-10-05 | 阿尔派株式会社 | A magnet, a picking-up device using the magnet and a manufacturing method of the magnet |
| JP2016178137A (en) * | 2015-03-19 | 2016-10-06 | 独立行政法人国立高等専門学校機構 | Magnet, pickup device arranged by use thereof and manufacturing method of magnet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20070904 |