JP2000150254A - Dust core - Google Patents
Dust coreInfo
- Publication number
- JP2000150254A JP2000150254A JP10336573A JP33657398A JP2000150254A JP 2000150254 A JP2000150254 A JP 2000150254A JP 10336573 A JP10336573 A JP 10336573A JP 33657398 A JP33657398 A JP 33657398A JP 2000150254 A JP2000150254 A JP 2000150254A
- Authority
- JP
- Japan
- Prior art keywords
- dust core
- molded body
- gap
- permanent magnet
- powder
- 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
- 239000000428 dust Substances 0.000 title claims abstract description 25
- 239000000843 powder Substances 0.000 claims abstract description 27
- 230000005291 magnetic effect Effects 0.000 claims abstract description 18
- 239000011230 binding agent Substances 0.000 claims abstract description 11
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 9
- 238000000748 compression moulding Methods 0.000 claims description 4
- 229920002050 silicone resin Polymers 0.000 abstract description 10
- 229910045601 alloy Inorganic materials 0.000 abstract description 9
- 239000000956 alloy Substances 0.000 abstract description 9
- 239000000203 mixture Substances 0.000 abstract description 3
- 125000006850 spacer group Chemical group 0.000 abstract description 3
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 2
- 230000037431 insertion Effects 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000035699 permeability Effects 0.000 description 4
- 229910000640 Fe alloy Inorganic materials 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、チョークコイル等
に用いられる圧粉磁心に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust core used for a choke coil or the like.
【０００２】[0002]
【従来の技術】従来より、図５に示すように、鉄や鉄合
金、もしくは、フェライト等の強磁性粉をシリコーン樹
脂等の熱硬化性樹脂よりなるバインダーと混合した後、
所定形状に成形した圧粉磁心１０が、よく知られてい
る。2. Description of the Related Art Conventionally, as shown in FIG. 5, after a ferromagnetic powder such as iron, iron alloy, or ferrite is mixed with a binder made of a thermosetting resin such as a silicone resin,
A dust core 10 formed into a predetermined shape is well known.
【０００３】従来の圧粉磁心１０は、通常、鉄や鉄合
金、もしくは、フェライト等の強磁性粉と、シリコーン
樹脂等の熱硬化性樹脂よりなるバインダーとを混合した
混合物、もしくは、予めバインダーによって被覆された
強磁性粉を、金型内に充填し、圧縮成型して形成されて
いた。なお、従来の圧粉磁心の粉充填率は８０％であ
る。The conventional dust core 10 is usually prepared by mixing a ferromagnetic powder such as iron, iron alloy, or ferrite with a binder made of a thermosetting resin such as a silicone resin, or by using a binder in advance. The coated ferromagnetic powder was filled in a mold and compression-molded. The powder filling rate of the conventional dust core is 80%.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、従来の
圧粉磁心は、それ自身の飽和磁束密度が低いため、直流
重畳特性が悪いという問題があった。However, the conventional dust core has a problem that the DC superposition characteristics are poor because the saturation magnetic flux density of the core itself is low.
【０００５】従って、本発明の課題は、飽和磁束密度を
高くすることで、直流重畳特性を向上し得る圧粉磁心を
提供することである。Accordingly, an object of the present invention is to provide a dust core capable of improving the DC superposition characteristics by increasing the saturation magnetic flux density.
【０００６】[0006]
【課題を解決するための手段】本発明は、強磁性粉とバ
インダーとを混合した粉末を圧縮成型して得られる圧粉
磁心において、成形体の磁路の少なくとも1個所にギャ
ップまたは切り欠きを設け、該ギャップまたは切り欠き
に永久磁石を配置した圧粉磁心である。According to the present invention, there is provided a powder magnetic core obtained by compression-molding a powder obtained by mixing a ferromagnetic powder and a binder, wherein a gap or a notch is formed in at least one portion of a magnetic path of the molded body. And a dust core in which a permanent magnet is disposed in the gap or the notch.
【０００７】本発明によれば、強磁性粉を、熱硬化性樹
脂よりなるバインダーと混合し、金型内で加工成形して
成形体を形成するときに、その成形体の少なくとも１個
所に永久磁石を挿入することによって、磁気バイアスを
印加した、有極チョークにした圧粉磁心が得られる。こ
れによって、飽和磁束密度を高くすることで、直流を重
畳した場合において、直流重畳特性が向上する。According to the present invention, when a ferromagnetic powder is mixed with a binder made of a thermosetting resin and processed and formed in a mold to form a molded body, permanent molding is performed at least at one portion of the molded body. By inserting a magnet, a powdered magnetic core in the form of a polarized choke to which a magnetic bias has been applied can be obtained. Thus, by increasing the saturation magnetic flux density, the DC superimposition characteristics are improved when DC is superimposed.
【０００８】なお、強磁性粉の材料は、鉄や鉄合金、も
しくは、フェライト等があるが、特に限定されるもので
はない。The material of the ferromagnetic powder includes iron, an iron alloy, and ferrite, but is not particularly limited.
【０００９】また、ギャップまたは切り欠きに挿入する
永久磁石は、特に限定されるものではないが、本発明に
おける圧粉磁心を更に小型化して使用するためには、Ｓ
ｍ−Ｃｏ磁石やＮｄ−Ｆｅ−Ｂ磁石等を用いることが好
ましい。The permanent magnet to be inserted into the gap or the notch is not particularly limited. However, in order to use the dust core of the present invention in a further reduced size, it is necessary to use an S magnet.
It is preferable to use an m-Co magnet, a Nd-Fe-B magnet, or the like.
【００１０】[0010]
【発明の実施の形態】以下、本発明を実施の形態によっ
て説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments.
【００１１】（実施の形態１）本発明の実施の形態１に
ついて、図１を参照して説明する。(Embodiment 1) Embodiment 1 of the present invention will be described with reference to FIG.
【００１２】この実施の形態では、強磁性粉として、Ｂ
ａｌ Ｆｅ−１０ｗｔ％Ｓｉ−５ｗｔ％Ａｌ合金粉（以
降、合金粉末と表記する）、バインダーとしてシリコー
ン樹脂を用いた例を示す。なお、配合比は、シリコーン
樹脂を３.００重量％、残部を合金粉とした例である。In this embodiment, as the ferromagnetic powder, B
An example in which al Fe-10 wt% Si-5 wt% Al alloy powder (hereinafter referred to as alloy powder) and a silicone resin as a binder is shown. The compounding ratio is an example in which the silicone resin is 3.00% by weight and the balance is alloy powder.
【００１３】まず、合金粉とシリコーン樹脂を投入し
て、撹拌機等により約１時間、撹拌・混合する。次に、
合金粉末とシリコーン樹脂との混合物を金型内に流し込
み、金型内に充填した後、室温で、１５ｔｏｎ／ｃｍ2
で圧縮成型し、成形体１を形成する。First, an alloy powder and a silicone resin are charged and stirred and mixed for about 1 hour by a stirrer or the like. next,
A mixture of the alloy powder and the silicone resin was poured into a mold and filled in the mold. Then, at room temperature, 15 ton / cm 2
To form a molded body 1.
【００１４】なお、この際、成形体１に、後で永久磁石
２を挿入するための所定のスペーサーを設け、ギャップ
を形成する。At this time, a predetermined spacer for inserting the permanent magnet 2 later is provided in the molded body 1 to form a gap.
【００１５】圧縮成型後、成形体１を金型より取り出し
て、恒温層等により、約１７０℃、２時間で、バインダ
ー硬化を行うことによって硬化する。次に、大気中で、
７００℃、２時間、熱処理を行う。After the compression molding, the molded body 1 is taken out of the mold and cured by performing binder curing at about 170 ° C. for 2 hours using a constant temperature layer or the like. Next, in the atmosphere,
Heat treatment is performed at 700 ° C. for 2 hours.
【００１６】最後に、ギャップの部分にＳｍ−Ｃｏ永久
磁石２を挿入して接着することによって、圧粉磁心１０
が形成される。この時、永久磁石２の部分を除く場所に
おける合金粉末の充填率は、８０％である。Finally, the Sm-Co permanent magnet 2 is inserted into the gap portion and adhered, so that the dust core 10 is
Is formed. At this time, the filling rate of the alloy powder in a place except the portion of the permanent magnet 2 is 80%.
【００１７】図２に、本実施の形態１による発明品１と
従来品の直流重畳特性を比較した結果を示す。なお、直
流重畳特性においては、測定を行う圧粉磁心に対して巻
線をし、ＨＰ製ＬＣＲメーター４２８４Ａを用いて、１
００ｋＨｚでのインダクタンスを測定後、透磁率を計算
で求めた。FIG. 2 shows the result of comparing the DC superposition characteristics of the invention 1 according to the first embodiment and the conventional product. In addition, in the DC superimposition characteristic, the winding was performed on the dust core to be measured, and 1
After measuring the inductance at 00 kHz, the magnetic permeability was determined by calculation.
【００１８】図２に示す測定結果から明らかなように、
本発明の実施の形態１によれば、永久磁石を圧粉磁心の
ギャップに挿入することにより、直流重畳特性が向上
し、強磁界側において、高い透磁率が得られた。As is clear from the measurement results shown in FIG.
According to the first embodiment of the present invention, by inserting the permanent magnet into the gap of the dust core, the DC superposition characteristics are improved, and a high magnetic permeability is obtained on the strong magnetic field side.
【００１９】（実施の形態２）次に、本発明の実施の形
態２について、図３を参照して説明する。(Embodiment 2) Next, Embodiment 2 of the present invention will be described with reference to FIG.
【００２０】この実施の形態２では、使用した合金粉末
とバインダーは、実施の形態１のものと同様である。In the second embodiment, the used alloy powder and binder are the same as those in the first embodiment.
【００２１】まず、実施の形態１と同様に、合金粉末と
シリコーン樹脂を、約１時間、撹拌・混合する。次に、
合金粉末とシリコーン樹脂との混合物を金型内に流し込
み、金型内に充填した後、室温で、１５ｔｏｎ／ｃｍ2
で圧縮成型し、成形体１２を形成する。First, as in the first embodiment, the alloy powder and the silicone resin are stirred and mixed for about one hour. next,
A mixture of the alloy powder and the silicone resin was poured into a mold and filled in the mold. Then, at room temperature, 15 ton / cm 2
To form a molded body 12.
【００２２】この際、成形体１２に、後で永久磁石２２
を挿入するための所定のスペーサーを設け、切り欠きを
形成する。At this time, the permanent magnet 22 is
Is provided with a predetermined spacer for inserting a notch, and a notch is formed.
【００２３】圧縮成型後、成形体１２を金型より取り出
して、恒温層等により、約１７０℃、２時間でバインダ
ー硬化を行うことによって硬化する。次に、大気中で、
７００℃、２時間、熱処理を行う。After the compression molding, the molded body 12 is taken out of the mold, and cured by performing binder curing at about 170 ° C. for 2 hours using a thermostatic layer or the like. Next, in the atmosphere,
Heat treatment is performed at 700 ° C. for 2 hours.
【００２４】最後に、切り欠きの部分にＳｍ−Ｃｏ永久
磁石２２を挿入して接着することによって、圧粉磁心１
０が形成される。この時、永久磁石２２の部分を除く場
所における合金粉末の充填率は、８０％である。Finally, the Sm-Co permanent magnet 22 is inserted into the notched portion and adhered, so that the dust core 1 is formed.
0 is formed. At this time, the filling rate of the alloy powder in a place except the portion of the permanent magnet 22 is 80%.
【００２５】図４に、本実施の形態２による本発明品２
と従来品の直流重畳特性を比較した結果を示す。なお、
直流重畳特性においては、測定を行う圧粉磁心に対して
巻線をし、ＨＰ製ＬＣＲメーター４２８４Ａを用いて、
１００ｋＨｚでのインダクタンスを測定後、透磁率を計
算で求めた。FIG. 4 shows a product 2 of the present invention according to the second embodiment.
The result of comparing the DC superposition characteristics of the conventional product and that of the conventional product is shown. In addition,
In the DC superimposition characteristics, a winding was performed around the powder magnetic core to be measured, and using an HP LCR meter 4284A,
After measuring the inductance at 100 kHz, the magnetic permeability was calculated.
【００２６】図４に示す測定結果から明らかなように、
本発明の実施の形態２によれば、永久磁石を圧粉磁心の
切り欠きに挿入することにより、有極特性となり、直流
重畳特性が向上し、強磁界側において、高い透磁率が得
られた。As is clear from the measurement results shown in FIG.
According to the second embodiment of the present invention, by inserting the permanent magnet into the notch of the dust core, the magnet becomes polarized, the DC superimposition property is improved, and a high magnetic permeability is obtained on the strong magnetic field side. .
【００２７】[0027]
【発明の効果】以上、説明した通り、本発明によれば、
成形体の磁路の１箇所以上にギャップまたは切り欠きを
設け、ギャップ部または切り欠き部に永久磁磁石を配置
することで、直流重畳特性に優れた圧粉磁心を容易に提
供することが可能となった。As described above, according to the present invention,
By providing a gap or notch at one or more places in the magnetic path of the molded body and disposing a permanent magnet magnet in the gap or notch, it is possible to easily provide a dust core excellent in DC superposition characteristics. It became.
【図１】本発明の実施の形態１における圧粉磁心の斜視
図。FIG. 1 is a perspective view of a dust core according to Embodiment 1 of the present invention.
【図２】本発明の実施の形態１および従来の圧粉磁心の
直流重畳特性を示す図。FIG. 2 is a diagram showing a DC superposition characteristic of the first embodiment of the present invention and a conventional dust core.
【図３】本発明の実施の形態２における圧粉磁心の斜視
図。FIG. 3 is a perspective view of a dust core according to Embodiment 2 of the present invention.
【図４】本発明の実施の形態２および従来の圧粉磁心の
直流重畳特性を示す図。FIG. 4 is a diagram showing DC superimposition characteristics of the second embodiment of the present invention and a conventional dust core.
【図５】従来の圧粉磁心の斜視図。FIG. 5 is a perspective view of a conventional dust core.
１，１２ 成形体 ２，２２ 永久磁石 １０ 圧粉磁心 1,12 molded body 2,22 permanent magnet 10 dust core
Claims (1)
を圧縮成型して得られる圧粉磁心において、成形体の磁
路の少なくとも1個所にギャップまたは切り欠きを設
け、該ギャップまたは切り欠きに永久磁石を配置したこ
とを特徴とする圧粉磁心。In a powder magnetic core obtained by compression-molding a powder obtained by mixing a ferromagnetic powder and a binder, a gap or a notch is provided at least at one position in a magnetic path of the molded body, and the gap or the notch is formed in the gap or the notch. A dust core, in which permanent magnets are arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10336573A JP2000150254A (en) | 1998-11-10 | 1998-11-10 | Dust core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10336573A JP2000150254A (en) | 1998-11-10 | 1998-11-10 | Dust core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000150254A true JP2000150254A (en) | 2000-05-30 |
Family
ID=18300550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10336573A Pending JP2000150254A (en) | 1998-11-10 | 1998-11-10 | Dust core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000150254A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103559981A (en) * | 2013-11-20 | 2014-02-05 | 戴珊珊 | AC permanent magnet gain transformation device and voltage regulating and control method thereof |
| WO2016013059A1 (en) * | 2014-07-22 | 2016-01-28 | 新電元工業株式会社 | Inductance component |
-
1998
- 1998-11-10 JP JP10336573A patent/JP2000150254A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103559981A (en) * | 2013-11-20 | 2014-02-05 | 戴珊珊 | AC permanent magnet gain transformation device and voltage regulating and control method thereof |
| JP2016540382A (en) * | 2013-11-20 | 2016-12-22 | 戴珊珊ＤＡＩ， Ｓｈａｎｓｈａｎ | AC permanent magnet enhancement transformer and pressure regulation control method thereof |
| KR101849866B1 (en) * | 2013-11-20 | 2018-04-17 | 산산 다이 | Ac permanent-magnet gain transformer device and voltage regulation control method thereof |
| CN103559981B (en) * | 2013-11-20 | 2018-05-22 | 戴珊珊 | AC permanent-magnet gain transformer and its Regulation Control method |
| WO2016013059A1 (en) * | 2014-07-22 | 2016-01-28 | 新電元工業株式会社 | Inductance component |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2004529508A (en) | Inductive element and its manufacturing method | |
| JPS63142606A (en) | Isotropic rare earth-iron field magnet for magnetic resonance image focusing | |
| EP1211699B1 (en) | Magnetic core having magnetically biasing bond magnet and inductance part using the same | |
| US7531050B2 (en) | Method for manufacturing bonded magnet and method for manufacturing magnetic device having bonded magnet | |
| CN111354559A (en) | Fixing device and method for forming aligned magnetic cores | |
| JP2000060080A (en) | Permanent-magnet motor and other device applied thereon | |
| JP2000150254A (en) | Dust core | |
| JPH11354344A (en) | Inductance element | |
| JPH11204319A (en) | Rare-earth bonded magnet and its manufacture | |
| JP2004158570A (en) | Choke coil and its manufacturing method | |
| JPH0559572B2 (en) | ||
| JP2000235925A (en) | Choke coil | |
| WO2024058040A1 (en) | Magnetic encoder | |
| JPS60931B2 (en) | Anisotropic magnet manufacturing method and manufacturing device | |
| JPH0997731A (en) | Manufacture of anisotropic sintered magnet | |
| JP2002198216A (en) | Sheet magnet and method of magnetizing the same | |
| JP2709068B2 (en) | Dust core | |
| JP2001037106A (en) | Yoke for motor | |
| JP2006245418A (en) | Inductance component | |
| JP2003059727A (en) | Magnetic core and inductance component using it | |
| JPH06342715A (en) | Dust core and its manufacture | |
| JPH06215967A (en) | Manufacture of transferred integrally-molded magnetic circuit | |
| JPH053124B2 (en) | ||
| JP2001185412A (en) | Anisotropic bonded magnet | |
| JPH0612728B2 (en) | Manufacturing method of cylindrical radial anisotropic permanent magnet |