JPH03173406A - Multipolar magnetizer - Google Patents
Multipolar magnetizerInfo
- Publication number
- JPH03173406A JPH03173406A JP31394689A JP31394689A JPH03173406A JP H03173406 A JPH03173406 A JP H03173406A JP 31394689 A JP31394689 A JP 31394689A JP 31394689 A JP31394689 A JP 31394689A JP H03173406 A JPH03173406 A JP H03173406A
- Authority
- JP
- Japan
- Prior art keywords
- pole
- magnetizer
- magnetic
- powder
- yoke
- 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.)
- Pending
Links
- 239000000696 magnetic material Substances 0.000 claims abstract description 17
- 239000006247 magnetic powder Substances 0.000 claims abstract description 15
- 238000000465 moulding Methods 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 7
- 239000003990 capacitor Substances 0.000 claims abstract description 5
- 229920005989 resin Polymers 0.000 claims abstract description 5
- 239000011347 resin Substances 0.000 claims abstract description 5
- 238000004804 winding Methods 0.000 abstract description 9
- 230000020169 heat generation Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 230000005415 magnetization Effects 0.000 description 7
- 230000005405 multipole Effects 0.000 description 6
- 238000000748 compression moulding Methods 0.000 description 3
- 239000012777 electrically insulating material Substances 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 239000013590 bulk material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910018605 Ni—Zn Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
Description
【発明の詳細な説明】
利用産業分野
この発明は、永久磁石用の多極着磁器の改良に係り、着
磁器を構成する磁性材を、磁性粉末を成型した磁性材と
なし、従来のバルク材からなる着磁器より強磁界を発生
させて、電流並びに発熱の大幅な低減を図った多極着磁
器に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Application The present invention relates to the improvement of a multipolar magnetizer for permanent magnets, and the magnetic material constituting the magnetizer is a magnetic material formed by molding magnetic powder, which is different from the conventional bulk material. The present invention relates to a multi-polar magnetizer that generates a stronger magnetic field than a magnetizer consisting of a magnetizer, and significantly reduces current and heat generation.
背景技術
多極着磁器には、種々の構成が提案されているが、放電
電流を利用した着磁器は、基本的にはヨークに複数のポ
ールピースを配設して各ポールピースに巻線を施した構
成からなる。Background Art Various configurations have been proposed for multi-pole magnetizers, but magnetizers that use discharge current basically have multiple pole pieces arranged in a yoke and windings around each pole piece. It consists of the following configuration.
２極着磁器を例に揚げて説明すると、第１図に示す如く
、ヨーク（１）に２極のポールピース（２Ｘ３）を要求
される磁極間隔で配置し、各ポールピース（２Ｘ３）に
数ターンの巻線（４）を行ない、巻線（４）にコンデン
サー電源からの放電電流（５〜１０ｋＡ）により永久磁
石の２極着磁を行なっている。Taking a two-pole magnetizer as an example, as shown in Figure 1, two pole pieces (2 x 3) are arranged on the yoke (1) at the required magnetic pole spacing, and each pole piece (2 x 3) has a number of A turn winding (4) is performed, and the permanent magnet is polarized with a discharge current (5 to 10 kA) from a capacitor power source to the winding (4).
かかるパルス電流による着磁では、通常低炭素鋼からな
るポールピースあるいはヨーク中に、渦電流が発生する
ため、コイル電流による発生磁界を減少させる。In magnetization using such a pulse current, an eddy current is generated in the pole piece or yoke, which is usually made of low carbon steel, thereby reducing the magnetic field generated by the coil current.
そこでより高い電流を流すと求める磁界が得られるが、
発熱のため着磁器が破壊される。また、耐高電流用の太
い巻線を使用すると、ポールビース間、すなわち極間（
ｅ）が広がり、所要の着磁パターンが得られなくなる。The desired magnetic field can be obtained by passing a higher current, but
The magnetizer is destroyed due to heat generation. In addition, when using thick windings for high current resistance, between the pole beads, that is, between the poles (
e) spreads, making it impossible to obtain the desired magnetization pattern.
発明の目的
この発明は、上述の問題点に鑑み、放電電流を利用した
多極着磁器において、発熱量が少なくかつ強磁界を発生
し、少ない電流で着磁可能な多極着磁器の提供を目的と
している。Purpose of the Invention In view of the above-mentioned problems, it is an object of the present invention to provide a multi-pole magnetizer using discharge current that generates a small amount of heat, generates a strong magnetic field, and can be magnetized with a small amount of current. The purpose is
発明の概要
この発明は、
ヨークに複数のポールピースを配設して各ポールピース
に巻線を施し、コンデンサー電源からの放電電流により
発生した磁界にて着磁する多極着磁器において、
着磁器を構成する磁性材のうち少なくともポールピース
を、磁性粉末を成型して所要形状となした磁性材で構成
したことを特徴とする多極着磁器である。Summary of the Invention This invention provides a multi-pole magnetizer in which a plurality of pole pieces are arranged on a yoke, each pole piece is wound with a wire, and magnetized by a magnetic field generated by a discharge current from a capacitor power supply. This is a multi-polar magnetizer characterized in that at least the pole pieces of the magnetic materials constituting the magnetic material are made of a magnetic material formed by molding magnetic powder into a desired shape.
発明の構成
この発明は、発熱量が少なくかつ強磁界を発生する多極
着磁器を目的に種々検討した結果、軟磁性粉末を成型し
た電気抵抗の大きい材料にてポールピースあるいはさら
にヨークを構成することにより、少電流で強磁界を発生
し所要の着磁が可能になることを知見し、この発明を完
成した。Structure of the Invention As a result of various studies aimed at creating a multi-pole magnetizer that generates a strong magnetic field while generating a small amount of heat, the present invention consists of a pole piece or a yoke made of a material with high electrical resistance formed by molding soft magnetic powder. This led to the discovery that it was possible to generate a strong magnetic field with a small current and achieve the required magnetization, and completed this invention.
この発明において、軟磁性粉末を成型して所要形状とな
した磁性材は、磁性粉を圧縮成形したものであれば公知
のいずれのものも適宜選定できるが、磁性粉は、Ｍｎ−
Ｚｎフェライト粉、Ｎｉ−Ｚｎフェライト粉、センダス
ト粉、ダストコア用純鉄粉など、高透磁率で飽和磁化が
大きくかつ固有抵抗の大きな軟磁性粉末が好ましい。In this invention, the magnetic material formed by molding soft magnetic powder into a desired shape may be any known material as long as it is made by compression molding magnetic powder.
Soft magnetic powders such as Zn ferrite powder, Ni-Zn ferrite powder, sendust powder, and pure iron powder for dust cores, which have high magnetic permeability, large saturation magnetization, and large specific resistance, are preferable.
これら磁性粉末は、エポキシ樹脂、シリコンなどの電気
絶縁性材料と複合し、公知のＨＰ（ＨｏｔＰｒｅｓｓｉ
ｎｇ）、ＣＩＰ（Ｃｏｌｄ ｌ５ｏｓｔａｔｉｃ Ｐｒ
ｅｓｓｉｎｇ）、ＨＩＰ（ＨｏｔＩｓｏｓｔａｔｉｃ
Ｐｒｅｓｓｉｎｇ）法等にて成型して所要形状の磁極片
を構成するとよい。These magnetic powders are composited with electrically insulating materials such as epoxy resin and silicone, and are used in the well-known HP (Hot Press)
ng), CIP (Cold l5ostatic Pr
essing), HIP(HotIsostatic
It is preferable to form the magnetic pole piece in a desired shape by molding using a pressing method or the like.
前記の磁性粉末と電気絶縁性材料との複合に際し、電気
絶縁性材料は総量の１０％以下が好ましい。また、得ら
れた磁性材料の固有抵抗は、０．０１ΩＣｍ以上が好ま
しい。When combining the magnetic powder and the electrically insulating material, the electrically insulating material preferably accounts for 10% or less of the total amount. Moreover, the specific resistance of the obtained magnetic material is preferably 0.01 ΩCm or more.
さらに、軟磁性粉末が、所要粒度粉末からなり磁性粉末
表面が電気絶縁性樹脂でコーティングされた粉末である
と、各粒子間が電気的に絶縁されており電気抵抗が高い
ため、パルス磁界が作用したとき渦電流の発生を低減で
き、より好ましい効果が得られる。Furthermore, if the soft magnetic powder is a powder with the required particle size and the surface of the magnetic powder is coated with an electrically insulating resin, each particle is electrically insulated and has a high electrical resistance, so a pulsed magnetic field will act on it. When this is done, the generation of eddy currents can be reduced and more favorable effects can be obtained.
発明の効果
この発明は、多極着磁器を構成する磁性材のうち少なく
ともポールピースを上述の磁性粉末を成型した磁性材か
ら構成するが、実施例に示す如く、ポールピースのみで
も従来の低炭素鋼ブロックからなる着磁器と比較して、
著しく強い着磁磁界が得られ、同一磁界を得るにはより
少ない電流で着磁でき、発熱も少なくなる。さらにヨー
クも同様に構成すると、さらにすぐれた効果が得られる
。Effects of the Invention In this invention, among the magnetic materials constituting the multi-pole magnetizer, at least the pole piece is made of a magnetic material formed by molding the above-mentioned magnetic powder. Compared to a magnetizer consisting of a steel block,
A significantly stronger magnetizing magnetic field can be obtained, less current is required to obtain the same magnetic field, and less heat is generated. Further, if the yoke is configured in the same way, even better effects can be obtained.
また、多極着磁器の構成も実施例の如きリニアアクチュ
エータ用の平面着磁のほか、モーター用などの曲面着磁
など、公知のいずれの構成にも適用できる。Furthermore, the structure of the multi-pole magnetizer can be applied to any known structure, such as planar magnetization for linear actuators as in the embodiment, or curved surface magnetization for motors.
実施例
第１図に示すボイスコイルモーター用永久磁石の２極着
磁器は、厚み２０ｍｍのヨーク（１）に２７Ｘ３０Ｘ８
ｍｍの２極のポールピース（２Ｘ３）を２ｍｍの磁極間
隔（ｅ）で配置し、各ポールピース（２Ｘ３）に厚み０
．２ｍｍＸ幅７ｍｍの巻線（４）を３ターンとした構成
からなる。Example A two-pole magnetizer for a permanent magnet for a voice coil motor shown in FIG.
Two mm pole pieces (2X3) are arranged with a magnetic pole spacing (e) of 2 mm, and each pole piece (2X3) has a thickness of 0.
．． It consists of three turns of winding wire (4) of 2 mm x 7 mm width.
上記構成の２極着磁器において、ヨークとポールピース
を低炭素！（８８４１）のブロックで製作した着磁器（
従来例）、樹脂でコーティングした粉末を圧縮成型した
磁性材をポールピースに用いた着磁器（本発明１）、さ
らに磁性材をヨークとポールピースに用いた着磁器（本
発明２）、の３種類を作製し、該巻線（４）にコンデン
サー電源からの放電電流（０〜１０ｋＡ）により永久磁
石の２極着磁試験を行なった。In the two-pole magnetizer with the above configuration, the yoke and pole piece are made with low carbon! (8841) Magnetizer (
Conventional example), a magnetizer using a magnetic material made by compression molding resin-coated powder for the pole piece (present invention 1), and a magnetizer using a magnetic material for the yoke and pole piece (present invention 2). A permanent magnet was subjected to a two-pole magnetization test using a discharge current (0 to 10 kA) from a capacitor power supply to the winding (4).
該試験結果を、第２図の２極着磁器におけるコイル電流
と着磁磁界とのグラフに示す。The test results are shown in the graph of coil current and magnetizing magnetic field in a two-pole magnetizer in FIG.
樹脂でコーティングした軟質磁性粉末を圧縮成型した磁
性材は、飽和磁束密度Ｂ３＝、＝１０ｋＧ、密度ｐ ＝
６．４ｇ／ａｍ３と低いが、電気抵抗率が２０ｍΩａ
ｍとバルク材より３桁も高いので、後述の如く強い着磁
磁界が得られた。A magnetic material made by compression molding of soft magnetic powder coated with resin has a saturation magnetic flux density B3=, =10 kG, and a density p=
Although it is low at 6.4g/am3, the electrical resistivity is 20mΩa
Since m is three orders of magnitude higher than that of the bulk material, a strong magnetizing magnetic field was obtained as described below.
第２図に示す如く、この発明の圧縮成型磁性材を用いた
着磁器（本発明１，２）は、低炭素鋼（３８４１）のブ
ロックで製作した着磁器（従来例）よりも、同一電流で
３０〜４０％強い磁界が得られたことが分かる。また、
同一磁界を得るのに約５０％の電流でよく、発熱は２５
％と大幅に減少した。As shown in Fig. 2, the magnetizer using the compression-molded magnetic material of the present invention (inventions 1 and 2) has a higher electric current than the magnetizer (conventional example) made of a block of low carbon steel (3841). It can be seen that a 30 to 40% stronger magnetic field was obtained. Also,
Approximately 50% of the current is required to obtain the same magnetic field, and the heat generation is 25%.
% decreased significantly.
第１図は２極着磁器の斜視説明図である。
第２図は２極着磁器におけるコイル電流と着磁磁界との
関係を示すグラフである。
１・・・ヨーク、２，３・・・ポールピース、４・・・
巻線。FIG. 1 is a perspective explanatory view of a two-pole magnetizer. FIG. 2 is a graph showing the relationship between coil current and magnetizing magnetic field in a two-pole magnetizer. 1... Yoke, 2, 3... Pole piece, 4...
winding.
Claims (1)
ースに巻線を施し、コンデンサー電源からの放電電流に
より発生した磁界にて着磁する多極着磁器において、 着磁器を構成する磁性材のうち少なくともポールピース
を、磁性粉末を成型して所要形状となした磁性材で構成
したことを特徴とする多極着磁器。 ２ 軟磁性粉末が樹脂でコーティングした粉末であるこ
とを特徴とする請求項１記載の多極着磁器。[Claims] 1. A multi-polar magnetizer in which a plurality of pole pieces are arranged on a yoke, each pole piece is wound with a wire, and magnetized by a magnetic field generated by a discharge current from a capacitor power source, comprising: 1. A multi-polar magnetizer, characterized in that at least one pole piece of the magnetic material constituting the magnetic material is made of a magnetic material formed by molding magnetic powder into a desired shape. 2. The multipolar magnetizer according to claim 1, wherein the soft magnetic powder is resin-coated powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31394689A JPH03173406A (en) | 1989-12-01 | 1989-12-01 | Multipolar magnetizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31394689A JPH03173406A (en) | 1989-12-01 | 1989-12-01 | Multipolar magnetizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03173406A true JPH03173406A (en) | 1991-07-26 |
Family
ID=18047405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31394689A Pending JPH03173406A (en) | 1989-12-01 | 1989-12-01 | Multipolar magnetizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03173406A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05107011A (en) * | 1991-10-18 | 1993-04-27 | Hitachi Cable Ltd | Method and apparatus for measuring long material having magnetic property |
| US5515020A (en) * | 1991-08-14 | 1996-05-07 | Icl Systems Aktiebolag | Premagnetizing head |
| WO2005008693A1 (en) * | 2003-07-11 | 2005-01-27 | Carl Freudenberg Kg | Magnetizing device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4930897A (en) * | 1972-07-20 | 1974-03-19 |
-
1989
- 1989-12-01 JP JP31394689A patent/JPH03173406A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4930897A (en) * | 1972-07-20 | 1974-03-19 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5515020A (en) * | 1991-08-14 | 1996-05-07 | Icl Systems Aktiebolag | Premagnetizing head |
| JPH05107011A (en) * | 1991-10-18 | 1993-04-27 | Hitachi Cable Ltd | Method and apparatus for measuring long material having magnetic property |
| WO2005008693A1 (en) * | 2003-07-11 | 2005-01-27 | Carl Freudenberg Kg | Magnetizing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1480134A (en) | Electric inductors | |
| PL130707B2 (en) | Anisotropic permanent magnet and method of making the same | |
| JP2008187887A (en) | Structure of rotor and stator for electrical machine | |
| US5252924A (en) | Magnetic field generating apparatus for MRI | |
| EP0341308A4 (en) | Eddy current brake. | |
| JPS6150368B2 (en) | ||
| GB747736A (en) | Improvements in or relating to devices comprising a circuit of highly-permeable material and a permanent magnet for producing a pre-magnetizing field in said circuit | |
| JPH03173406A (en) | Multipolar magnetizer | |
| JPS6076110A (en) | Assembling and magnetizing method for magnetic circuit | |
| USRE35565E (en) | Magnetic field generating apparatus for MRI | |
| JPS6350824Y2 (en) | ||
| JP2696417B2 (en) | Bipolar magnetizer | |
| FR2056159A5 (en) | ||
| JP2572299Y2 (en) | Two-pole magnetized permanent magnet for flat coil vibration type voice coil motor | |
| JP6948170B2 (en) | Core for current limiting reactor and current limiting reactor | |
| JPH069471Y2 (en) | Multipolar anisotropic cylindrical plastic magnet mold | |
| JPS6153843B2 (en) | ||
| JPH0215834B2 (en) | ||
| RU2217828C2 (en) | Method for reversal magnetization of multipole permanent magnets and magnetic systems | |
| JPH01248077A (en) | Method and apparatus for measuring magnetic characteristic of magnetic body | |
| SU1731432A1 (en) | Device for manufacturing anisotropic permanent magnets from magnetically hard powders | |
| JPH0719710B2 (en) | Resin magnet manufacturing method | |
| JPS5814057B2 (en) | Demagnetization method | |
| JPH0426339A (en) | Permanent magnet rotor | |
| JPS63316658A (en) | Multipolar magnetization |