JPH07169612A - Magnetic core and its manufacture - Google Patents
Magnetic core and its manufactureInfo
- Publication number
- JPH07169612A JPH07169612A JP5313005A JP31300593A JPH07169612A JP H07169612 A JPH07169612 A JP H07169612A JP 5313005 A JP5313005 A JP 5313005A JP 31300593 A JP31300593 A JP 31300593A JP H07169612 A JPH07169612 A JP H07169612A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic core
- toroidal
- coating
- magnetic
- winding
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000000758 substrate Substances 0.000 claims abstract description 17
- 239000011247 coating layer Substances 0.000 claims abstract description 8
- 239000013078 crystal Substances 0.000 claims abstract description 8
- 239000011248 coating agent Substances 0.000 claims description 44
- 238000000576 coating method Methods 0.000 claims description 44
- 238000004804 winding Methods 0.000 claims description 28
- 229910001004 magnetic alloy Inorganic materials 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 16
- 229920005989 resin Polymers 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 14
- 229920000052 poly(p-xylylene) Polymers 0.000 claims description 12
- -1 polyparaxylylene Polymers 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 7
- 238000010791 quenching Methods 0.000 claims description 7
- 230000000171 quenching effect Effects 0.000 claims description 7
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 description 10
- 239000000956 alloy Substances 0.000 description 10
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229910000859 α-Fe Inorganic materials 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 150000004703 alkoxides Chemical class 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005229 chemical vapour deposition Methods 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
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Landscapes
- Soft Magnetic Materials (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はインターフェース用等の
パルストランスあるいはノイズフィルタ用チョーク等に
使用される小型、薄型の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 small and thin magnetic core used for pulse transformers for interfaces or chokes for noise filters.
【０００２】[0002]
【従来の技術】近年、表面実装技術の進歩により電子機
器の小型化、薄型化、高機能化が急速に進展している。
これに伴いコイル部品にも小型、薄型で高性能な表面実
装品が強く求められている。例えば、ISDNのインターフ
ェース用パルストランスには、小型、薄型で高周波伝送
特性に優れることが要求される。すなわち、インダクタ
ンスが大きい、巻線間容量が小さい、入出力巻線間の結
合が高い等が要求される。また、過酷な使用環境に耐え
られるだけの十分な温度特性も必要とされる。2. Description of the Related Art In recent years, advances in surface mounting technology have led to rapid progress in downsizing, thinning and high functionality of electronic equipment.
Along with this, there is a strong demand for small, thin, high-performance surface mount products for coil components. For example, ISDN interface pulse transformers are required to be small, thin, and have excellent high-frequency transmission characteristics. That is, a large inductance, a small inter-winding capacitance, a high coupling between the input and output windings, etc. are required. In addition, sufficient temperature characteristics are required to withstand the harsh usage environment.
【０００３】現在、この用途には主にフェライトが使用
され、高さ３ｍｍ程度の小型、薄型パルストランスが実
用化されている。しかし、フェライトの透磁率は高々１
００００程度と小さいため、パルストランスに用いた場
合、所定のインダクタンスを得るために巻線数が多くな
り巻線間容量が増大し、十分な伝送特性が得られないば
かりでなく、透磁率の温度特性が悪いため伝送特性が不
安定となりやすいことや、小型、薄型で高透磁率のフェ
ライトを製造することが困難である等の問題があった。At present, ferrite is mainly used for this purpose, and a small and thin pulse transformer having a height of about 3 mm has been put into practical use. However, the permeability of ferrite is at most 1
Since it is as small as about 0000, when used in a pulse transformer, the number of windings increases to obtain a predetermined inductance, the inter-winding capacitance increases, and not only sufficient transmission characteristics cannot be obtained, but also the magnetic permeability temperature There are problems that the transmission characteristics are likely to be unstable due to poor characteristics, and that it is difficult to manufacture a small and thin ferrite having high magnetic permeability.
【０００４】近年、超微結晶軟磁性合金等に代表される
液体急冷法により作製される磁性合金薄帯を用いたトロ
イダル磁心が注目され、各種インダクタンス素子として
使用されている。特開平２-２９５１０１号にはフェラ
イトに比べ透磁率の高い超微結晶軟磁性合金を用いた、
ISDNのインターフェース変成器用磁心が開示されてい
る。ここでは、液体急冷法により製造された幅６ｍｍの
超微結晶軟磁性合金薄帯を外径１４ｍｍ、内径７ｍｍ、
高さ６ｍｍに巻回した、伝送特性に優れる磁心が開示さ
れている。しかし、磁心のインダクタンスおよび薄型化
の点で不十分である。In recent years, toroidal magnetic cores using magnetic alloy ribbons produced by a liquid quenching method represented by ultrafine crystalline soft magnetic alloys have been drawing attention and used as various inductance elements. Japanese Patent Laid-Open No. 2-295101 uses an ultrafine crystalline soft magnetic alloy having a higher magnetic permeability than ferrite.
A magnetic core for an ISDN interface transformer is disclosed. Here, an ultrafine crystal soft magnetic alloy ribbon having a width of 6 mm manufactured by a liquid quenching method is used, having an outer diameter of 14 mm, an inner diameter of 7 mm,
A magnetic core wound at a height of 6 mm and having excellent transmission characteristics is disclosed. However, it is insufficient in terms of inductance and thinning of the magnetic core.
【０００５】[0005]
【発明が解決しようとする課題】一般に、金属磁性合金
薄帯から構成されたトロイダル磁心を用いたコイル部品
では磁心と巻線間を電気的に絶縁する必要があるため、
磁心を樹脂製のケースに収納し巻線を施したケース品
と、磁心外表面をコーティングし、巻線を施したコーテ
ィング品が知られている。上述したように、コイル部品
にはますます小型化、薄型化が要求されており、これに
伴い、トロイダル磁心を構成する磁性合金薄帯の幅を狭
くし、磁心自体の高さを低くしたり、ケースやコーティ
ング層の薄肉化や巻線の細線化が試みられている。しか
しながら、ケース品の場合、０.２ｍｍ以下の薄肉形状
のコアケースを作製することは実用上困難であり、機械
的強度も劣るため取扱いが難しい問題がある。一方、コ
ーティング品の場合、１μm程度までの薄肉化は容易で
あるが、トロイダル磁心の断面は長方形形状が一般的で
あるため、エッジ部のコーティング肉厚が局部的に著し
く低下もしくはコーティング層が全く被覆されなくなる
ため、磁心と巻線間の絶縁耐圧が低下する問題があっ
た。また、磁心に巻線を施す場合に巻線の損傷が起こり
やすく、巻線間の絶縁耐圧が低下するという問題も発生
することが判明した。Generally, in a coil component using a toroidal magnetic core composed of a metal magnetic alloy ribbon, it is necessary to electrically insulate the magnetic core from the winding.
A case product in which a magnetic core is housed in a resin case and wound, and a coated product in which a magnetic core outer surface is coated and wound are known. As mentioned above, coil components are required to be smaller and thinner, and along with this, the width of the magnetic alloy ribbon forming the toroidal magnetic core is narrowed to lower the height of the magnetic core itself. Attempts have been made to reduce the thickness of cases and coating layers and to reduce the thickness of winding wires. However, in the case of a case product, it is practically difficult to produce a thin core case having a thickness of 0.2 mm or less, and there is a problem that it is difficult to handle due to poor mechanical strength. On the other hand, in the case of a coated product, it is easy to reduce the thickness to about 1 μm, but since the cross section of the toroidal magnetic core is generally rectangular, the coating thickness at the edge part is significantly reduced locally or the coating layer is completely absent. There is a problem that the insulation breakdown voltage between the magnetic core and the winding is lowered because it is not covered. Further, it has been found that when the winding is applied to the magnetic core, the winding is likely to be damaged, which causes a problem that the withstand voltage between the windings is lowered.
【０００６】本発明は上記の問題点を解決するととも
に、インターフェース用等のパルストランス磁心やノイ
ズフィルター用チョーク磁心等に適する超薄型トロイダ
ル磁心を提供することである。The present invention solves the above problems and provides an ultra-thin toroidal magnetic core suitable for pulse transformer magnetic cores for interfaces, choke magnetic cores for noise filters, and the like.
【０００７】[0007]
【課題を解決するための手段】本発明者等は上記問題点
について鋭意研究を進めた結果、外表面をコーティング
した長方形断面形状を有するトロイダル磁心において、
長方形断面のエッジ部を面取加工することにより、巻線
の損傷が無くなり、巻線と磁心間の絶縁耐圧が向上する
こと、および高さ３ｍｍ以下の薄型で高インダクタンス
の磁心が得られることを初めて見出し、本発明を創出す
るに至った。Means for Solving the Problems As a result of intensive studies on the above-mentioned problems, the present inventors have found that in a toroidal magnetic core having a rectangular cross-section with an outer surface coated,
By chamfering the edge of the rectangular cross section, damage to the winding is eliminated, the withstand voltage between the winding and the magnetic core is improved, and a thin and high-inductance magnetic core with a height of 3 mm or less can be obtained. For the first time, they found the present invention and created the present invention.
【０００８】すなわち、本発明の磁心は、超微結晶軟磁
性合金薄帯を巻回してなるトロイダル磁心基体と、その
外表面を被覆するコーティング層とからなる磁心におい
て、トロイダル磁心基体のエッジ部が面取りされている
ことを特徴とする。本発明磁心の面取り寸法は、０．１
〜０．５ｍｍであることが望ましい。０．１ｍｍ未満の
場合、エッジ部のコーティング肉厚が減少するため巻線
の損傷が起こりやすくなり、巻線と磁心間の絶縁耐圧が
低下する。一方、面取寸法が０．５ｍｍを越えると、磁
心の断面積が減少するため、所定のインダクタンスを得
るために巻線数が多くなり、巻線間の浮遊容量が増加し
共振を起こしやすくなるからである。That is, the magnetic core of the present invention comprises a toroidal magnetic core substrate formed by winding an ultrafine crystalline soft magnetic alloy ribbon and a coating layer covering the outer surface of the toroidal magnetic core substrate. It is characterized by being chamfered. The chamfered dimension of the magnetic core of the present invention is 0.1
It is desirable to be 0.5 mm. When the thickness is less than 0.1 mm, the coating thickness of the edge portion is reduced, so that the winding is likely to be damaged and the withstand voltage between the winding and the magnetic core is reduced. On the other hand, if the chamfered dimension exceeds 0.5 mm, the cross-sectional area of the magnetic core is reduced, so that the number of windings is increased to obtain a predetermined inductance, the stray capacitance between the windings is increased, and resonance is likely to occur. Because.
【０００９】トロイダル磁心の外表面のコーティング肉
厚は、磁心に作用する応力、コーティング肉厚の均一
性、絶縁耐圧および磁心の高さの点から１０〜５０μm
が好ましく、特に２０〜３０μmにすることで超薄型、
高インダクタンスで絶縁耐圧に優れる磁心が得られる。
また、トロイダル磁心の長方形断面のエッジ部のコーテ
ィング肉厚は５μm以上が好ましい。肉厚が５μm未満で
はエッジ部のコーティング肉厚が不均一となるため巻線
と磁心間の絶縁耐圧が低下する。実用的には、コーティ
ング肉厚が５〜５０μmの場合、薄型で絶縁耐圧に優れ
る磁心が得られる。コーティングに用いる材質としては
ポリパラキシリレン系、フッ素系、エポキシ系、フェノ
ール系、シリコン系等の樹脂、無機ワニスおよび金属ア
ルコキシド等が使用できる。ポリバラキシリレン系樹脂
は、コーティング肉厚が均一で、薄肉化が容易であるこ
とや、絶縁耐圧が高いため、コーティング材質として特
に望ましい。The coating thickness of the outer surface of the toroidal magnetic core is 10 to 50 μm in terms of stress acting on the magnetic core, uniformity of coating thickness, dielectric strength and height of the magnetic core.
Is preferable, and especially when it is 20 to 30 μm, it is ultra thin,
A magnetic core with high inductance and excellent withstand voltage can be obtained.
The coating thickness of the edge portion of the rectangular cross section of the toroidal magnetic core is preferably 5 μm or more. If the wall thickness is less than 5 μm, the coating thickness at the edge portion becomes uneven, and the withstand voltage between the winding and the magnetic core decreases. Practically, when the coating thickness is 5 to 50 μm, a thin magnetic core having excellent withstand voltage can be obtained. As a material used for coating, polyparaxylylene-based, fluorine-based, epoxy-based, phenol-based, silicon-based resin, inorganic varnish, metal alkoxide, or the like can be used. Polyvaraxylylene resin is particularly desirable as a coating material because it has a uniform coating thickness, can be easily thinned, and has a high dielectric strength.
【００１０】トロイダル磁心に使用される磁性合金薄帯
の幅は、磁心の薄型化のためには３ｍｍ以下が望ましい
が、幅が０．５ｍｍ未満の薄帯を製造することは実用上
困難であるため、０．５〜３ｍｍの範囲が好ましい。特
に０．５〜２ｍｍの範囲が望ましい。The width of the magnetic alloy ribbon used for the toroidal magnetic core is preferably 3 mm or less for thinning the magnetic core, but it is practically difficult to manufacture a ribbon having a width of less than 0.5 mm. Therefore, the range of 0.5 to 3 mm is preferable. Particularly, the range of 0.5 to 2 mm is desirable.
【００１１】また、磁性合金薄帯の板厚は、液体急冷
法、例えば単ロール法により通常製造可能な５〜３０μ
mの範囲が望ましく、特に１０〜２０μmの範囲が容易に
薄帯を製造できるため好ましい。薄帯の板厚は、例え
ば、重量換算により以下の式によって求められる。採取
する薄帯の長さは５０cm程度とすることで、再現良く板
厚が求められる。 平均板厚＝重量／（密度×長さ×幅）The plate thickness of the magnetic alloy ribbon is 5 to 30 μm which can be usually produced by a liquid quenching method, for example, a single roll method.
A range of m is desirable, and a range of 10 to 20 μm is particularly preferable because a ribbon can be easily manufactured. The plate thickness of the thin strip is calculated by the following formula by weight conversion. By setting the length of the thin strip to be about 50 cm, the plate thickness can be obtained with good reproducibility. Average plate thickness = weight / (density x length x width)
【００１２】本発明の磁心に用いる超微結晶軟磁性合金
としては、例えば、本発明者等が提案した特開昭６３-
３０２５０４号、特開昭６４-３９３４７号、特開平１-
１４２０４９号、特開平１-１４９９４０号、特開平１-
１５６４５２号、特開平１-２４２７５５号、特開平１-
２４２７５６号等が開示されており、いずれの合金も使
用できる。The ultrafine crystalline soft magnetic alloy used in the magnetic core of the present invention is, for example, the one proposed by the present inventors.
No. 302504, JP-A-64-39347, JP-A-1-
142049, JP-A-1-149940, JP-A-1-
156452, JP-A-1-242755, JP-A-1-
No. 242756 is disclosed, and any alloy can be used.
【００１３】また、本発明磁心は、超微結晶軟磁性合金
薄帯を巻回してなるトロイダル磁心基体と、その外表面
を被覆するコーティング層とからなる磁心の製造方法に
おいて、超微結晶軟磁性合金薄帯を巻回してトロイダル
磁心基体を得る工程と、トロイダル磁心基体の外表面を
コーティングする工程と、トロイダル磁心基体のエッジ
部を面取り加工する工程と、再度トロイダル磁心基体の
外表面をコーティングする工程とからなる製造方法によ
って製造することができる。Further, the magnetic core of the present invention comprises a toroidal magnetic core substrate formed by winding an ultrafine crystalline soft magnetic alloy ribbon, and a method for producing a magnetic core comprising a coating layer coating the outer surface thereof. Winding the alloy ribbon to obtain a toroidal magnetic core substrate, coating the outer surface of the toroidal magnetic core substrate, chamfering the edge of the toroidal magnetic core substrate, and coating the outer surface of the toroidal magnetic core substrate again. It can be manufactured by a manufacturing method including a step.
【００１４】以下この製造方法の望ましい態様について
説明する。先ず、単ロール法により幅０.５〜３ｍｍ、
板厚５〜３０μmの非晶質合金薄帯を巻回しトロイダル
磁心を作製する。次に、非晶質合金の結晶化温度以上の
４５０〜６００゜Cの温度で、１０分〜２０時間、アルゴ
ンガスや窒素ガス等の不活性ガス雰囲気中、あるいは真
空中で熱処理することにより、粒径１０００オンク゛ストローム
以下の超微細なbccFe結晶粒を主体とした組織を形成さ
せる。熱処理は無磁界中、静磁界中、回転磁界中いずれ
の条件で実施しても良い。また、特に高周波で使用する
場合は、磁心を作製する際に合金薄帯表面の少なくとも
一方の面に ＳｉＯ２やＡｌ２Ｏ３等の層間絶縁膜を
０.１〜３μmの厚さに形成することにより磁心のインダ
クタンスが一層向上するため好ましい結果が得られる。
次に、熱処理した磁心の外表面に上述したコーティング
材を用いてコーティングを施す。コーティング肉厚は５
〜１０μm程度が好ましい。コーティング条件は用いる
材質に応じて最適な条件で行う。例えば、ポリパラキシ
リレン系樹脂は化学蒸着によりトロイダル磁心の外表面
をコーティングする。次に、コーティングされたトロイ
ダル磁心のエッジ部に０.１〜０.５ｍｍの面取加工を施
す。面取加工は磁心外表面のコーティング材の部分だけ
でなく、磁心自体も面取加工により除去される。この理
由は、コーティング肉厚が数１０μm程度と薄いため、
コーティング材のみ面取加工することが極めて困難なた
めである。最後に面取りした磁心を再度コーティング
し、磁心外表面のコーティング肉厚を１０〜５０μm、
エッジ部のコーティング肉厚を５μm以上とする。A desirable mode of this manufacturing method will be described below. First, the width of 0.5-3 mm by the single roll method,
A toroidal magnetic core is manufactured by winding an amorphous alloy ribbon having a plate thickness of 5 to 30 μm. Next, by heat-treating at a temperature of 450 to 600 ° C. higher than the crystallization temperature of the amorphous alloy for 10 minutes to 20 hours in an inert gas atmosphere such as argon gas or nitrogen gas, or in vacuum, A structure mainly composed of ultrafine bccFe crystal grains having a grain size of 1000 angstroms or less is formed. The heat treatment may be carried out under any condition of no magnetic field, static magnetic field and rotating magnetic field. Further, particularly when used at a high frequency, an interlayer insulating film such as SiO 2 or Al 2 O 3 is formed to a thickness of 0.1 to 3 μm on at least one surface of the alloy ribbon when the magnetic core is manufactured. As a result, the inductance of the magnetic core is further improved, and a desirable result is obtained.
Next, the outer surface of the heat-treated magnetic core is coated with the above-mentioned coating material. Coating thickness is 5
It is preferably about 10 μm. The coating conditions should be optimum according to the material used. For example, a polyparaxylylene resin coats the outer surface of the toroidal magnetic core by chemical vapor deposition. Next, the edge portion of the coated toroidal magnetic core is chamfered to have a thickness of 0.1 to 0.5 mm. The chamfering process removes not only the coating material on the outer surface of the magnetic core but also the magnetic core itself. The reason for this is that the coating thickness is as thin as several tens of μm,
This is because it is extremely difficult to chamfer only the coating material. Finally, the chamfered magnetic core is coated again, and the coating thickness on the outer surface of the magnetic core is 10 to 50 μm.
The coating thickness of the edge part is 5 μm or more.
【００１５】[0015]
【実施例】以下、本発明を実施例にしたがって説明する
が本発明はこれらに限定されるものではない。EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited thereto.
【００１６】（実施例１）原子%でＣｕ１％、Ｎｂ１
％、Ｓｉ１３．５％、Ｂ９％、残部実質的にFeからなる
組成の合金溶湯を単ロール法により急冷し、幅１ｍｍ、
厚さ２０μmの非晶質合金薄帯を作製した。得られた非
晶質合金薄帯を外径１０ｍｍ、内径５ｍｍに巻回しトロ
イダル磁心を作製した。次に、この磁心を窒素ガス雰囲
気中で、５５０℃で１h磁界をかけずに熱処理し、室温
まで空冷した。熱処理後、磁心を構成する合金薄帯の形
成相および組織を観察したところ、大部分が１００〜２
００オンク゛ストローム程度のbccFeの超微結晶粒からなってい
た。得られた磁心の外表面をポリパラキシリレン系樹脂
でコーティングした後、エッジ部に０.２ｍｍの面取加
工を施し、再度ポリパラキシリレン系樹脂でコーティン
グし、磁心外表面のコーティング肉厚を２０μm、エッ
ジ部のコーティング肉厚を５μmに調整した。インピ−
ダンスアナライザを用いて周波数２０kHzのインダクタ
ンス係数、また、磁心に１次、２次巻線を施して、絶縁
耐圧試験器を用いてコイルの絶縁耐圧を測定した。(Example 1) Cu 1% and Nb 1 in atomic%
%, Si 13.5%, B 9%, the balance substantially consisting of Fe, the alloy melt is quenched by the single roll method, and the width is 1 mm.
An amorphous alloy ribbon having a thickness of 20 μm was produced. The obtained amorphous alloy ribbon was wound around an outer diameter of 10 mm and an inner diameter of 5 mm to produce a toroidal magnetic core. Next, this magnetic core was heat-treated in a nitrogen gas atmosphere at 550 ° C. for 1 hour without applying a magnetic field and air-cooled to room temperature. After the heat treatment, the forming phase and the structure of the alloy ribbon forming the magnetic core were observed, and most of them were 100 to 2
It was composed of bccFe ultrafine crystal grains of about 00 angstrom. After coating the outer surface of the obtained magnetic core with polyparaxylylene-based resin, the edge is chamfered to 0.2 mm and then coated again with polyparaxylylene-based resin. Was adjusted to 20 μm and the coating thickness of the edge portion was adjusted to 5 μm. Impey
An inductance coefficient of a frequency of 20 kHz was measured using a dance analyzer, primary and secondary windings were applied to the magnetic core, and the dielectric strength of the coil was measured using a dielectric strength tester.
【００１７】（比較例１）比較例として実施例１と同じ
方法で超微結晶軟磁性合金薄帯からなるトロイダル磁心
を作製した。得られた磁心の外表面をポリパラキシリレ
ン系樹脂でコーティングし、面取加工を施さず磁心外表
面のコーティング肉厚を２５μmに調整した。この時の
エッジ部の肉厚は２μmであった。実施例１と同様の方
法でインダクタンス係数および絶縁耐圧を測定した。(Comparative Example 1) As a comparative example, a toroidal magnetic core made of an ultrafine crystalline soft magnetic alloy ribbon was produced by the same method as in Example 1. The outer surface of the obtained magnetic core was coated with a polyparaxylylene resin, and chamfering was not performed, and the coating thickness of the outer surface of the magnetic core was adjusted to 25 μm. At this time, the thickness of the edge portion was 2 μm. The inductance coefficient and the withstand voltage were measured in the same manner as in Example 1.
【００１８】実施例１および比較例１の測定結果を表１
に示す。本発明の長方形断面のエッジ部を面取加工した
磁心がインダクタンス係数が高く、絶縁耐圧に優れてい
ることが確認された。The measurement results of Example 1 and Comparative Example 1 are shown in Table 1.
Shown in. It was confirmed that the magnetic core of the present invention, which has been chamfered at the edge of the rectangular cross section, has a high inductance coefficient and an excellent withstand voltage.
【００１９】[0019]
【表１】 [Table 1]
【００２０】（実施例２〜１１）実施例１と同じ方法で
超微結晶軟磁性合金薄帯からなるトロイダル磁心を作製
した。得られた磁心外表面をエポキシ系樹脂でコーティ
ングした後、エッジ部にそれぞれ０.０５ｍｍ、０.０８
ｍｍ、０.１ｍｍ、０.３ｍｍ、０.３５ｍｍ、０.４ｍ
ｍ、０.５ｍｍ、０.６ｍｍ、０.７ｍｍ、０.８ｍｍの面
取加工を施し、再度エポキシ系樹脂でコーティングし、
磁心外表面のコーティング肉厚を２５μm、エッジ部の
コーティング肉厚は１〜１０μmであった。実施例１と
同様の方法でインダクタンス係数および絶縁耐圧を測定
した。測定結果を表２に示すが、エッジ部の面取り寸法
が０．１〜０．５ｍｍの場合にインダクタンス係数が高
く、かつ絶縁耐圧が高いことが判明した。(Examples 2 to 11) By the same method as in Example 1, toroidal magnetic cores made of ultrafine crystalline soft magnetic alloy ribbons were manufactured. After coating the outer surface of the obtained magnetic core with an epoxy resin, the edge portions are each 0.05 mm and 0.08 mm.
mm, 0.1 mm, 0.3 mm, 0.35 mm, 0.4 m
m, 0.5mm, 0.6mm, 0.7mm, 0.8mm chamfering, and then coated with epoxy resin again,
The coating thickness on the outer surface of the magnetic core was 25 μm, and the coating thickness on the edge portion was 1 to 10 μm. The inductance coefficient and the withstand voltage were measured in the same manner as in Example 1. The measurement results are shown in Table 2, and it was found that the inductance coefficient was high and the withstand voltage was high when the chamfered dimension of the edge portion was 0.1 to 0.5 mm.
【００２１】[0021]
【表２】 [Table 2]
【００２２】（実施例１２〜１９）実施例１と同じ方法
で超微結晶軟磁性合金薄帯からなるトロイダル磁心を作
製した。得られた磁心をポリパラキシリレン系樹脂でコ
ーティングした後、エッジ部に０.３ｍｍの面取加工を
施した後、再度ポリパラキシリレン系樹脂でコーティン
グし、磁心外表面のコーティング肉厚を、１０μm、２
０μm、３０μm、５０μm、６０μm、７０μm、８０μ
m、１００μm に調整した。尚、エッジ部のコーティン
グ肉厚は５〜９０μmであった。実施例１と同様の方法
でインダクタンス係数、絶縁耐圧および磁心の高さを測
定した。測定結果を表３に示すが、磁心外表面のコーテ
ィング肉厚が１０〜５０μm、特に２０〜３０μmである
磁心が、薄型でインダクタンス係数が高く、かつ絶縁耐
圧が高いことが判明した。(Examples 12 to 19) By the same method as in Example 1, toroidal magnetic cores made of ultrafine crystalline soft magnetic alloy ribbons were produced. After coating the obtained magnetic core with polyparaxylylene-based resin, chamfering the edge part with 0.3 mm, then coating with polyparaxylylene-based resin again, the coating thickness of the magnetic core outer surface 10 μm, 2
0 μm, 30 μm, 50 μm, 60 μm, 70 μm, 80 μ
It was adjusted to m and 100 μm. The coating thickness of the edge portion was 5 to 90 μm. Inductance coefficient, dielectric strength and magnetic core height were measured in the same manner as in Example 1. The measurement results are shown in Table 3, and it was found that a magnetic core having a coating thickness on the outer surface of the magnetic core of 10 to 50 μm, particularly 20 to 30 μm was thin and had a high inductance coefficient and a high withstand voltage.
【００２３】[0023]
【表３】 [Table 3]
【００２４】（実施例２０〜２５）表４に示す組成の合
金溶湯を単ロ−ル法により急冷し、幅０.５ｍｍ、厚さ
５μmの非晶質合金薄帯を作製した。得られた非晶質合
金薄帯の両面にSiO2の層間絶縁膜を約2μm塗布した後、
外径１５ｍｍ、内径４ｍｍに巻回し、トロイダル磁心を
作製した。次に、この磁心をアルゴンガス雰囲気中で熱
処理し空冷した。熱処理は磁性薄帯の幅方向に３.５kA/
mの磁界を印加しながら、各合金に対する最適条件で行
った。熱処理後、磁心を構成する合金薄帯の形成相およ
び組織を観察したところ、大部分が１００〜２００オンク゛
ストローム程度のbccFeの超微結晶粒からなっていた。得られ
た磁心をポリパラキシリレン系樹脂でコーティングした
後、エッジ部に０.１５ｍｍの面取加工を施し、再度ポ
リパラキシリレン系樹脂でコーティングし、磁心外表面
のコーティング肉厚を３０μm、エッジ部のコーティン
グ肉厚を１０μmに調整した。実施例１と同様の方法で
インダクタンス係数および絶縁耐圧を測定した。(Examples 20 to 25) A molten alloy having the composition shown in Table 4 was rapidly cooled by a single roll method to prepare an amorphous alloy ribbon having a width of 0.5 mm and a thickness of 5 μm. After applying an SiO 2 interlayer insulating film on both surfaces of the obtained amorphous alloy ribbon in an amount of about 2 μm,
The toroidal magnetic core was manufactured by winding the outer diameter of 15 mm and the inner diameter of 4 mm. Next, this magnetic core was heat-treated in an argon gas atmosphere and air-cooled. Heat treatment is 3.5kA / in the width direction of the magnetic ribbon.
It was performed under the optimum conditions for each alloy while applying a magnetic field of m. After the heat treatment, the forming phase and the structure of the alloy ribbon forming the magnetic core were observed, and it was found that most of them consisted of ultrafine crystal grains of bccFe of about 100 to 200 angstrom. After coating the obtained magnetic core with polyparaxylylene resin, the edge is chamfered to 0.15 mm and coated again with polyparaxylylene resin to give a coating thickness of 30 μm on the outer surface of the magnetic core. The coating thickness of the edge portion was adjusted to 10 μm. The inductance coefficient and the withstand voltage were measured in the same manner as in Example 1.
【００２５】（比較例２、３）比較例として表４に示す
合金溶湯を単ロール法により急冷し、幅０.５ｍｍ、厚
さ５μmの非晶質合金薄帯を作製した。得られた非晶質
合金薄帯の両面にSiO2の層間絶縁膜を約２μm塗布した
後、外径１５ｍｍ、内径４ｍｍに巻回し、トロイダル磁
心を作製した。次に、この磁心をアルゴンガス雰囲気中
で熱処理し空冷した。熱処理は磁性薄帯の幅方向に３.
５kA/mの磁界を印加しながら、各合金に対する最適条件
で行った。得られた磁心をポリパラキシリレン系樹脂で
コーティングした後、エッジ部に０.１５ｍｍの面取加
工を施し、再度ポリパラキシリレン系樹脂でコーティン
グし、磁心外表面のコーティング肉厚を３０μm、エッ
ジ部のコーティング肉厚を１０μmに調整した。実施例
１と同様の方法でインダクタンス係数および絶縁耐圧を
測定した。(Comparative Examples 2 and 3) As comparative examples, the molten alloys shown in Table 4 were rapidly cooled by a single roll method to prepare amorphous alloy ribbons having a width of 0.5 mm and a thickness of 5 μm. An SiO 2 interlayer insulating film was applied on both surfaces of the obtained amorphous alloy ribbon in an amount of about 2 μm, and then wound around an outer diameter of 15 mm and an inner diameter of 4 mm to prepare a toroidal magnetic core. Next, this magnetic core was heat-treated in an argon gas atmosphere and air-cooled. Heat treatment in the width direction of the magnetic ribbon 3.
It was performed under the optimum conditions for each alloy while applying a magnetic field of 5 kA / m. After coating the obtained magnetic core with polyparaxylylene resin, the edge is chamfered to 0.15 mm and coated again with polyparaxylylene resin to give a coating thickness of 30 μm on the outer surface of the magnetic core. The coating thickness of the edge portion was adjusted to 10 μm. The inductance coefficient and the withstand voltage were measured in the same manner as in Example 1.
【００２６】実施例２０〜２５および比較例２、３の測
定結果を表４に示す。本発明はいずれの超微結晶軟磁性
合金にも適用でき、本発明の磁心がインダクタンス係数
が高く、かつ絶縁耐圧が高いことが分かった。Table 4 shows the measurement results of Examples 20 to 25 and Comparative Examples 2 and 3. The present invention can be applied to any ultra-fine crystal soft magnetic alloy, and it was found that the magnetic core of the present invention has a high inductance coefficient and a high dielectric strength voltage.
【００２７】[0027]
【表４】 [Table 4]
【００２８】[0028]
【発明の効果】本発明によれば、高インダクタンスで、
絶縁耐圧に優れる薄型磁心が得られるため、インターフ
ェース用等のパルストランスあるいはノイズフィルタ用
チョーク等に使用することにより、従来よりも高性能な
磁心を提供することが可能である。According to the present invention, with high inductance,
Since a thin magnetic core having an excellent withstand voltage can be obtained, it is possible to provide a magnetic core having higher performance than before by using the thin magnetic core in a pulse transformer for interface or a choke for noise filter.
フロントページの続き (72)発明者 荒川 俊介 埼玉県熊谷市三ケ尻5200番地日立金属株式 会社磁性材料研究所内 (72)発明者 三木 裕彦 鳥取県鳥取市南栄町33番地12号日立フェラ イト株式会社鳥取工場内 (72)発明者 玉飼 俊之 東京都文京区西片一丁目17番８号日立フェ ライト株式会社内Front Page Continuation (72) Inventor Shunsuke Arakawa 5200 Mikajiri, Kumagaya, Saitama Hitachi Metals Co., Ltd. Magnetic Materials Research Center (72) Inventor Hirohiko Miki 33-12 Minamieicho, Tottori City, Tottori Prefecture Hitachi Ferrite Co., Ltd.Tottori Factory (72) Inventor Toshiyuki Tamaki, 1-17-8 Nishikata, Bunkyo-ku, Tokyo Inside Hitachi Ferrite Co., Ltd.
Claims (11)
トロイダル磁心基体と、その外表面を被覆するコーティ
ング層とからなる磁心において、トロイダル磁心基体の
エッジ部が面取りされていることを特徴とする磁心。1. A magnetic core comprising a toroidal magnetic core substrate formed by winding an ultrafine crystalline soft magnetic alloy ribbon and a coating layer covering the outer surface of the toroidal magnetic core substrate, wherein the edge portion of the toroidal magnetic core substrate is chamfered. Characteristic magnetic core.
請求項１に記載の磁心。2. The magnetic core according to claim 1, wherein the chamfered dimension is 0.1 to 0.5 mm.
請求項１または２に記載の磁心。3. The magnetic core according to claim 1, which has a coating thickness of 5 to 50 μm.
〜５０μｍである請求項１〜３のいずれかに記載の磁
心。4. The coating thickness other than the chamfered portion is 10
The magnetic core according to any one of claims 1 to 3, which has a thickness of -50 µm.
る請求項１または２に記載の磁心。5. The magnetic core according to claim 1, wherein the coating thickness is 20 to 30 μm.
樹脂からなる請求項１〜５のいづれかに記載の磁心。6. The magnetic core according to claim 1, wherein the coating layer is made of polyparaxylylene resin.
〜３ｍｍの超微結晶何時整合金薄帯を巻回してなる請求
項１〜６のいずれかに記載の磁心。7. The width produced by the liquid quenching method is 0.5.
The magnetic core according to any one of claims 1 to 6, wherein an ultrafine crystal of 3 mm to 3 mm is wound around a matching gold ribbon.
〜２ｍｍの超微結晶軟磁性合金薄帯を巻回してなる請求
項１〜７のいずれかに記載の磁心。8. The width produced by the liquid quenching method is 0.5.
The magnetic core according to any one of claims 1 to 7, which is formed by winding an ultrafine crystalline soft magnetic alloy ribbon of about 2 mm.
３０μmの超微結晶軟磁性合金薄帯を巻回してなる請求
項１〜８のいずれかに記載の磁心。9. The plate thickness produced by the liquid quenching method is 5 to 5.
The magnetic core according to any one of claims 1 to 8, which is formed by winding an ultrafine crystal soft magnetic alloy ribbon of 30 µm.
０〜２５μmの超微結晶軟磁性合金薄帯を巻回してなる
請求項１〜９のいずれかに記載の磁心。10. The plate thickness produced by the liquid quenching method is 1
The magnetic core according to any one of claims 1 to 9, which is obtained by winding an ultrafine crystalline soft magnetic alloy ribbon of 0 to 25 µm.
るトロイダル磁心基体と、その外表面を被覆するコーテ
ィング層とからなる磁心の製造方法において、 超微結
晶軟磁性合金薄帯を巻回してトロイダル磁心基体を得る
工程と、 トロイダル磁心基体の外表面をコーティングする工程
と、 トロイダル磁心基体のエッジ部を面取り加工を施す工程
と、 再度トロイダル磁心基体の外表面をコーティングする工
程と、からなることを特徴とする磁心の製造方法。11. A method of manufacturing a magnetic core comprising a toroidal magnetic core substrate formed by winding an ultrafine crystalline soft magnetic alloy ribbon and a coating layer coating the outer surface thereof, wherein the ultrafine crystalline soft magnetic alloy ribbon is wound. From the process of turning to obtain the toroidal magnetic core substrate, the process of coating the outer surface of the toroidal magnetic core substrate, the process of chamfering the edge of the toroidal magnetic core substrate, and the process of coating the outer surface of the toroidal magnetic core substrate again. And a method for manufacturing a magnetic core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5313005A JPH07169612A (en) | 1993-12-14 | 1993-12-14 | Magnetic core and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5313005A JPH07169612A (en) | 1993-12-14 | 1993-12-14 | Magnetic core and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07169612A true JPH07169612A (en) | 1995-07-04 |
Family
ID=18036090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5313005A Pending JPH07169612A (en) | 1993-12-14 | 1993-12-14 | Magnetic core and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07169612A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11162745A (en) * | 1997-11-25 | 1999-06-18 | Matsushita Electric Works Ltd | Electromagnetic device |
| US6773619B2 (en) | 2001-07-17 | 2004-08-10 | Tdk Corporation | Magnetic core for transformer, Mn-Zn based ferrite composition and methods of producing the same |
| JP2010123993A (en) * | 2010-02-01 | 2010-06-03 | Toshiba Corp | Method of manufacturing thin magnetic core and method of manufacturing magnetic part |
| JP2016018863A (en) * | 2014-07-07 | 2016-02-01 | 住友電気工業株式会社 | Method for producing dust core, dust core and coil component |
-
1993
- 1993-12-14 JP JP5313005A patent/JPH07169612A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11162745A (en) * | 1997-11-25 | 1999-06-18 | Matsushita Electric Works Ltd | Electromagnetic device |
| US6773619B2 (en) | 2001-07-17 | 2004-08-10 | Tdk Corporation | Magnetic core for transformer, Mn-Zn based ferrite composition and methods of producing the same |
| JP2010123993A (en) * | 2010-02-01 | 2010-06-03 | Toshiba Corp | Method of manufacturing thin magnetic core and method of manufacturing magnetic part |
| JP2016018863A (en) * | 2014-07-07 | 2016-02-01 | 住友電気工業株式会社 | Method for producing dust core, dust core and coil component |
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