JP2001085257A - Choke coil core and its manufacture - Google Patents
Choke coil core and its manufactureInfo
- Publication number
- JP2001085257A JP2001085257A JP25677399A JP25677399A JP2001085257A JP 2001085257 A JP2001085257 A JP 2001085257A JP 25677399 A JP25677399 A JP 25677399A JP 25677399 A JP25677399 A JP 25677399A JP 2001085257 A JP2001085257 A JP 2001085257A
- Authority
- JP
- Japan
- Prior art keywords
- core
- air gap
- permeability
- magnetic
- iron
- 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
Landscapes
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明は、チョークコイル
等に用いられる磁芯の製造方法および磁芯に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a magnetic core used for a choke coil and the like, and a magnetic core.
【0002】[0002]
【従来の技術】チョークコイル用磁芯には一般的にエア
ギャップが形成されている。これは、用途上、大きな直
流バイスが加わり、コイルに重畳される電流とコイルの
巻数の積(アンペア・ターン)に対するインダクタンス
の飽和を防ぐため、磁路中にエアギャップを形成し、透
磁率を下げるためである。2. Description of the Related Art An air gap is generally formed in a magnetic core for a choke coil. This is because a large DC bias is added to the application and an air gap is formed in the magnetic path to prevent saturation of the inductance with respect to the product (ampere turn) of the current superimposed on the coil and the number of turns of the coil. To lower it.
【0003】その製造にあたっては、鉄基アモルファス
合金材料を所定の寸法に巻取り、この巻鉄芯に熱処理を
施し、ついで、エポキシ樹脂などに含浸し、固化した
後、一部を切断し、予め決定してある寸法のエアギャッ
プを形成している。[0003] In the production, an iron-based amorphous alloy material is wound into a predetermined size, a heat treatment is applied to the wound iron core, then impregnated with an epoxy resin or the like, solidified, partially cut, and cut in advance. An air gap of a predetermined size is formed.
【0004】このエアギャップは電流とコイルの巻数の
積(アンペア・ターン)が大きくなれば、それに伴って
大きくする必要がある。The air gap needs to be increased as the product of the current and the number of turns of the coil (ampere turn) increases.
【0005】[0005]
【発明が解決しようとする課題】しかしながら、このエ
アギャップが大きくなると、そのエアギャップより発生
する漏洩磁束が周辺部品、機器へ悪影響を及ぼしたり、
コイル自身の発熱につながる恐れもある、という課題が
あった。However, when the air gap becomes large, the leakage magnetic flux generated from the air gap adversely affects peripheral parts and equipment,
There is a problem that the coil itself may generate heat.
【0006】この発明は上記の点に鑑み提案されたもの
で、その目的とするところは、電流とコイルの巻数の積
が大きくなってもエアギャップの寸法を小さく押さえ、
低透磁率の磁芯とすることができ、よって漏洩磁束を少
なくし、周辺部品、機器への悪影響、コイル自身の発熱
等を低減させたチョークコイル用磁芯の製造方法を提供
することにある。[0006] The present invention has been proposed in view of the above point, the object is to reduce the size of the air gap even if the product of the current and the number of turns of the coil increases,
An object of the present invention is to provide a method for manufacturing a core for a choke coil, which can be a magnetic core having a low magnetic permeability, thereby reducing leakage magnetic flux, and reducing adverse effects on peripheral components and equipment, heat generation of the coil itself, and the like. .
【0007】また、エアギャップを形成する場合、Lg
(ギャップ長)とLm(磁路長)の比を所定の値に設定
することにより、低透磁率とし、漏洩磁束を少なくし、
周辺部品、機器への悪影響等を低減した磁芯を提供する
ことにある。When an air gap is formed, Lg
By setting the ratio between (gap length) and Lm (magnetic path length) to a predetermined value, it is possible to reduce the magnetic permeability, reduce the leakage magnetic flux,
An object of the present invention is to provide a magnetic core with reduced adverse effects on peripheral components and equipment.
【0008】[0008]
【課題を解決するための手段】この発明は鉄基アモルフ
ァス合金を素材とする巻鉄芯を熱処理にて透磁率200
≦μa≦2000(4KHz、400A/m)とした
後、前記巻鉄芯を含浸し、エアギャップを形成する構成
とし前記目的を達成している。According to the present invention, a wound iron core made of an iron-based amorphous alloy is heat-treated to have a magnetic permeability of 200.
After satisfying ≦ μa ≦ 2000 (4 KHz, 400 A / m), the above-described object is achieved by impregnating the wound iron core to form an air gap.
【0009】また、鉄基アモルファス合金を素材とする
巻鉄芯を熱処理し、この巻鉄芯に形成するエアギャップ
は、Lg(ギャップ長)/Lm(磁路長)を0.02以
下とし、透磁率を150以下にすることにより、上記目
的を達成している。[0009] Further, a wound iron core made of an iron-based amorphous alloy is heat-treated, and an air gap formed in the wound iron core is such that Lg (gap length) / Lm (magnetic path length) is 0.02 or less; The above object is achieved by setting the magnetic permeability to 150 or less.
【0010】[0010]
【発明の実施の形態】以下、本発明の実施例を説明す
る。Embodiments of the present invention will be described below.
【0011】[0011]
【実施例1】なお、実施例はあくまで最適と思われる一
つの例示であって、本発明の精神を逸脱しない範囲で種
々の変更あるいは改良を行い得ることは言うまでもな
い。[Embodiment 1] The embodiment is merely one example considered to be optimal, and it goes without saying that various changes or improvements can be made without departing from the spirit of the present invention.
【0012】製造にあたっては、まず、鉄基アモルファ
ス合金を素材として厚さ20〜25μm、巾15mmの
ものを用い、外径25mm、内径15mmのトロイダル
状に形成し、かつ熱処理にて透磁率200≦μa≦20
00(4KHz、400A/m)とした。At the time of manufacture, first, an iron-based amorphous alloy having a thickness of 20 to 25 μm and a width of 15 mm is used. μa ≦ 20
00 (4 KHz, 400 A / m).
【0013】熱処理は形状の安定化と素材に起因する脆
性の向上のために行う。この熱処理により誘導磁気異方
性を発生させ、低透磁率とする。The heat treatment is performed for stabilizing the shape and improving the brittleness caused by the material. By this heat treatment, induced magnetic anisotropy is generated to reduce the magnetic permeability.
【0014】具体的には、大気雰囲気中で、温度400
℃〜450℃で熱処理を行い、透磁率350(4KH
z、400A/m)とした後、樹脂含浸を行い、これに
0.8mmのエアギャップを設け、低透磁率100とし
た。なお、含浸用の樹脂としてはエポキシ樹脂を用い
た。Specifically, in an air atmosphere, at a temperature of 400
C. to 450.degree. C., and a magnetic permeability of 350 (4 KH
(z, 400 A / m), the resin was impregnated, an air gap of 0.8 mm was provided in the resin impregnation, and the low magnetic permeability was 100. Note that an epoxy resin was used as a resin for impregnation.
【0015】次に、上記方法で製造された本発明による
チョークコイル用磁芯と、従来の方法で製造された磁芯
とのヒステリシスループの比較を示す。従来品はほぼ同
じ寸法のものをN2(窒素)雰囲気中で、温度ほぼ37
0℃で、時間約3時間焼鈍を行ったものを用いた。Next, a comparison of the hysteresis loop between the magnetic core for a choke coil according to the present invention manufactured by the above method and the magnetic core manufactured by the conventional method will be shown. The conventional product has almost the same dimensions in an N 2 (nitrogen) atmosphere at a temperature of about 37.
Annealed at 0 ° C. for about 3 hours was used.
【0016】図1(a)は従来法で製造されたエアギャ
ップのない磁芯、(b)は本発明により製造されたエア
ギャップのない状態の磁芯、(c)は従来法で1.6m
mのギャップを設けた場合、(d)は本発明で0.8m
mのギャップを設けた場合である。このように本発明で
は小さなエアギャップで低透磁率の磁芯とすることがで
きる。なお、これらの図において、横軸は外部磁場(H
m)を表しており、単位はOe(エルステッド)であ
る。縦軸は磁束密度(Bm)を表しており、単位はKG
(キロガウス)である。FIG. 1A shows a magnetic core without an air gap manufactured by a conventional method, FIG. 1B shows a magnetic core without an air gap manufactured by the present invention, and FIG. 6m
When a gap of m is provided, FIG.
This is the case where a gap of m is provided. Thus, in the present invention, a magnetic core having a small air gap and a low magnetic permeability can be obtained. In these figures, the horizontal axis represents the external magnetic field (H
m ), and the unit is Oe (Oersted). The vertical axis represents the magnetic flux density (B m ), and the unit is KG
(Kilo gauss).
【0017】図2は従来品と本発明品とのエアギャップ
の大きさの比較を示す。(a)は従来品、(b)は本発
明品である。図中(1′)、(1)はトロイダル状の磁
芯、(2)はエアギャップ中に挿入されたギャップ材で
あり、本発明により製造された磁芯(1)は従来の方法
により製造された磁芯(1′)の約1/2のエアギャッ
プで同等の透磁率を有し、エアギャップが小さいため、
漏洩磁束を低減でき、かかる弊害を防止し得る。FIG. 2 shows a comparison of the size of the air gap between the conventional product and the product of the present invention. (A) is a conventional product, and (b) is a product of the present invention. In the figure, (1 ') and (1) are toroidal magnetic cores, (2) is a gap material inserted in an air gap, and the magnetic core (1) manufactured by the present invention is manufactured by a conventional method. The air permeability is about the same as the air gap of about 1/2 of the magnetic core (1 '), and the air gap is small.
Leakage magnetic flux can be reduced, and such adverse effects can be prevented.
【0018】[0018]
【実施例2】また、鉄基アモルファス合金を素材とし、
厚さ20〜25μm、巾25mmのものを用い、外径6
0mm、内径30mmのトロイダル状に形成し、熱処理
を行った。Embodiment 2 Further, an iron-based amorphous alloy is used as a material,
Thickness: 20-25 μm, width: 25 mm, outer diameter: 6
It was formed in a toroidal shape having a diameter of 0 mm and an inner diameter of 30 mm, and heat-treated.
【0019】このものにエアギャップを形成する場合、
Lg(ギャップ長)/Lm(磁路長)を0.02以下に
したところ、透磁率が150以下の低透磁率の磁芯を得
ることができた。When an air gap is formed in this,
When Lg (gap length) / Lm (magnetic path length) was set to 0.02 or less, a magnetic core having a low magnetic permeability of 150 or less could be obtained.
【0020】[0020]
【発明の効果】以上請求項1記載のように、鉄基アモル
ファス合金を素材としたものを所定形状の巻鉄芯とし、
熱処理により透磁率200≦μa≦2000(4KH
z、400A/m)とした後、エアギャップを入れて構
成した本発明によれば、小さなエアギャップにより低透
磁率の磁芯を得ることができる。このため、漏洩磁束も
少なくできるため、周辺部品、機器に及ぼす影響も少な
くなり、また、コイル自身の発熱も抑えることができる
効果がある。また、請求項2記載のものにおいても低透
磁率磁芯を得ることができ、このものを使用しても同様
の効果を得ることができる。According to the first aspect of the present invention, an iron-based amorphous alloy is used as a raw material to form a wound iron core having a predetermined shape.
Magnetic permeability 200 ≦ μa ≦ 2000 (4KH
z, 400 A / m), and according to the present invention in which an air gap is inserted, a magnetic core having a low magnetic permeability can be obtained with a small air gap. For this reason, since the leakage magnetic flux can be reduced, the effect on peripheral components and devices is reduced, and the heat generated by the coil itself can be suppressed. Further, a magnetic core having a low magnetic permeability can be obtained also in the second embodiment, and the same effect can be obtained by using this magnetic core.
【図1】 (a)は従来例のヒステリシスループ、
(b)は本発明により製造された磁芯であってエアギャ
ップ形成前の特性、(c)は従来例において1.6mm
のエアギャップを設けた場合、(d)は本発明で0.8
mmのエアギャップ形成後の特性を示す。FIG. 1A shows a conventional hysteresis loop,
(B) is a magnetic core manufactured according to the present invention and has characteristics before an air gap is formed, and (c) is 1.6 mm in a conventional example.
(D) is 0.8% according to the present invention.
The characteristics after forming an air gap of mm are shown.
【図2】 (a)は従来品の磁芯の平面説明図、(b)
は本発明品を示す。FIG. 2A is a plan view of a conventional magnetic core, and FIG.
Indicates a product of the present invention.
1 磁芯 2 ギャップ材 1 Magnetic core 2 Gap material
フロントページの続き (72)発明者 有間 洋 埼玉県川越市大字小堤387 タムラ精工株 式会社内 Fターム(参考) 5E062 AA02 AB06 AB15 AB17 Continued on the front page (72) Inventor Hiroshi Arima 387 Koizumi, Kawagoe-shi, Saitama F-term in Tamura Seiko Co., Ltd. (Reference) 5E062 AA02 AB06 AB15 AB17
Claims (2)
芯を熱処理にて透磁率200≦μa≦2000(4KH
z、400A/m)とした後、前記巻鉄芯を含浸し、エ
アギャップを形成することを特徴とするチョークコイル
用磁芯の製造方法。A wound iron core made of an iron-based amorphous alloy is heat treated to have a magnetic permeability of 200 ≦ μa ≦ 2000 (4 KH
z, 400 A / m) and then impregnating the wound iron core to form an air gap.
芯を熱処理し、この巻鉄芯に形成するエアギャップは、
Lg(ギャップ長)/Lm(磁路長)を0.02以下と
し、透磁率を150以下にしたことを特徴とするチョー
クコイル用磁芯。2. An air gap formed in a core wound with a core made of an iron-based amorphous alloy is heat-treated.
A magnetic core for a choke coil, wherein Lg (gap length) / Lm (magnetic path length) is 0.02 or less and magnetic permeability is 150 or less.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25677399A JP2001085257A (en) | 1999-09-10 | 1999-09-10 | Choke coil core and its manufacture |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25677399A JP2001085257A (en) | 1999-09-10 | 1999-09-10 | Choke coil core and its manufacture |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2001085257A true JP2001085257A (en) | 2001-03-30 |
Family
ID=17297255
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP25677399A Pending JP2001085257A (en) | 1999-09-10 | 1999-09-10 | Choke coil core and its manufacture |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2001085257A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100518677B1 (en) * | 1997-03-18 | 2005-10-05 | 메트글라스, 인코포레이티드 | Electrical choke |
JP2006514432A (en) * | 2003-01-30 | 2006-04-27 | メトグラス・インコーポレーテッド | Amorphous metal core with gaps |
-
1999
- 1999-09-10 JP JP25677399A patent/JP2001085257A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100518677B1 (en) * | 1997-03-18 | 2005-10-05 | 메트글라스, 인코포레이티드 | Electrical choke |
JP2006514432A (en) * | 2003-01-30 | 2006-04-27 | メトグラス・インコーポレーテッド | Amorphous metal core with gaps |
JP2011171772A (en) * | 2003-01-30 | 2011-09-01 | Metglas Inc | Gapped amorphous metal-based magnetic core |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7442263B2 (en) | Magnetic amplifier choke (magamp choke) with a magnetic core, use of magnetic amplifiers and method for producing softmagnetic cores for magnetic amplifiers | |
KR890002910A (en) | Magnetic core and its manufacturing method | |
US6144279A (en) | Electrical choke for power factor correction | |
JP2001085257A (en) | Choke coil core and its manufacture | |
JP2004319652A (en) | Core and method of manufacturing the same | |
JPS6396252A (en) | Heat treatment of toroidal amorphous magnetic core | |
JPS6124211A (en) | Magnetic core for polarized choke coil | |
WO1999003116A1 (en) | Coil | |
JPS6032311A (en) | Magnetic core for choke coil | |
JPH0834160B2 (en) | Swing choke coil | |
JPS60178610A (en) | Choke coil | |
JPS6032313A (en) | Magnetic core | |
JPS63129606A (en) | Manufacture of amorphous magnetic alloy core | |
JP2788248B2 (en) | High frequency magnetic core and method of manufacturing the same | |
JPH01180944A (en) | Amorphous magnetic alloy for choking coil and its production | |
JP2000235925A (en) | Choke coil | |
CN117727552A (en) | Preparation method of low-permeability iron-based nanocrystalline magnetic core and iron-based nanocrystalline magnetic core | |
JPH029111A (en) | Manufacture of toroidal iron core using iron system amorphous alloy | |
KR20050021709A (en) | Hybrid amorphous core | |
JPS59144113A (en) | Magnetic core | |
Chen | Amorphous magnetic alloys for high frequency power electronic applications | |
JPS63174304A (en) | Magnetic core | |
JPH02175813A (en) | Manufacture of amorphous magnetic alloy foil | |
O'Handley et al. | Low-field magnetic properties of wide Fe-Ni metallic glass strips | |
JPH0794340A (en) | Non-gap core and manufacture thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A02 | Decision of refusal |
Effective date: 20040106 Free format text: JAPANESE INTERMEDIATE CODE: A02 |