JPS5844702A - Magnetic core of amorphous magnetic alloy for high frequency - Google Patents
Magnetic core of amorphous magnetic alloy for high frequencyInfo
- Publication number
- JPS5844702A JPS5844702A JP56142252A JP14225281A JPS5844702A JP S5844702 A JPS5844702 A JP S5844702A JP 56142252 A JP56142252 A JP 56142252A JP 14225281 A JP14225281 A JP 14225281A JP S5844702 A JPS5844702 A JP S5844702A
- Authority
- JP
- Japan
- Prior art keywords
- thin band
- thickness
- surface roughness
- magnetic core
- high frequency
- 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.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/153—Amorphous metallic alloys, e.g. glassy metals
- H01F1/15341—Preparation processes therefor
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Soft Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は電磁気数置に用いて有効な低損失−晶質―性会
金Ｏ１ｌ心に関し、更に詳しくは、高岡線領域（１＠ｌ
ｃＨｇ−ｚ＊ｏｉ侶８）で鉄損が著しく小さくスイッチ
ングレギュレータなどに好適な高周波用非晶質磁性合金
Ｏ磁心に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a low-loss crystalline alloy O1l core that is effective for use in electromagnetic mathematics.
The present invention relates to an amorphous magnetic alloy O core for high frequency use, which has extremely low iron loss at cHg-z*oi (8) and is suitable for switching regulators and the like.
従来から、スイッチングレギュレータなど高周波で使用
すゐ磁心としては、パーマーイ、アエライ）などの結晶
質材料が用いられている。Conventionally, crystalline materials such as Permai and Aerai have been used for magnetic cores used in high frequency applications such as switching regulators.
しかしながら、パーマロイは比抵抗が小さいので高周波
でＯ鉄損が大暑くなる。を九、フエツイＦは高周波でＯ
損失は小さ、いが、磁束帯１１．％せいぜい！５ＯＯＯ
Ｇと小１（、そのため、大暑な動作磁束１度でＯＩ！用
時に＆りては、飽和に近くなｐそＯ紬果鉄損が増大する
。近時、スイッチングレギ為し−タＫＩ！用され為電源
トツｙスなど高周波で使用され為トツｙスＫＴｈいては
、形状の小型化がＩＩ壜れているが、その場合、動作磁
束ｖＢＩｉｔの増大が必Ｉ！七ｔｋｈため、７エツイ）
０鉄損増大社実用上大自な間−と１ｋＩｈ。However, since permalloy has a low resistivity, the O iron loss becomes very high at high frequencies. 9, Fuetsui F is O at high frequency
The loss is small, but the magnetic flux band 11. % at most! 5OOOO
Therefore, when using a very hot operating magnetic flux of 1 degree, the iron loss increases, which is close to saturation. For high-frequency devices such as power supplies used for high-frequency applications, it is possible to make the shape more compact, but in that case, it is necessary to increase the operating magnetic flux vBIit because it is 7tkh. )
Between 0 iron loss increase and 1kIh, which is practical.
一方、結晶構造を持たない非晶質ｉｍ性合金は、高逓−
率、健保磁力など優れた軟質磁性特性を示すＯで最近注
目を集めて％／％る。これらＯ非晶質磁性合金は、Ｆ・
、 Ｃｏ 、 Ｎｌ などを基本とし、これに非晶質
仁兄＄ｉ（メタロイド）としてＰ、Ｃ，Ｂ。On the other hand, amorphous im alloys that do not have a crystal structure have high
Recently, O has attracted attention due to its excellent soft magnetic properties such as magnetic flux and magnetic force. These O amorphous magnetic alloys are F.
, Co, Nl, etc., and P, C, and B as amorphous metalloids.
８ｉ、Ａｔ、Ｇ・ などを包含するものである。8i, At, G, etc.
しかしながら、これら非晶質磁性合金の全てが高周波領
域で鉄損が小さいというわけではない。However, not all of these amorphous magnetic alloys have small iron loss in the high frequency range.
例えば、Ｆｅ系非晶質合金は、５０〜６ＧＨｚの低周波
領域ではケイ素鋼０約１／４という非常に小さい鉄損を
示すが、ｌＫＨｇ以上Ｏ以上波高周波領域と著しく大き
な鉄損を示し、とてもスイッチンダレギ＾レータ轡の高
周波領域での使用に適合する亀Ｏではない。辷れは、動
作周波数の２乗に比例すゐ渦電流損失に基づく現象であ
る。そのため、非晶質磁性合金の薄帯を磁心としてｌ
ＫＨｚ以上Ｏ高周高周域で使用する場合に社、一般に、
咳薄帯Ｏ厚みをＢＯＩｋａａ以下に調整することが必要
である。For example, an Fe-based amorphous alloy exhibits a very small iron loss of about 1/4 of silicon steel in the low frequency range of 50 to 6 GHz, but it shows a significantly large iron loss in the high frequency range of 1 KHg or more and O or more. It is not suitable for use in the high frequency range of switch regulators. Slipping is a phenomenon based on eddy current losses, which are proportional to the square of the operating frequency. Therefore, it is possible to use a thin ribbon of amorphous magnetic alloy as a magnetic core.
When used in the high frequency range of KHz or higher, generally,
It is necessary to adjust the thickness of the cough band O to below BOIkaa.
他方、非晶質磁性−合金の薄帯は、通常、石英などの耐
熱Ｓ器の中で溶融した所定組成の溶融合金、 を皺合
金にガス圧を加えることによって、該容器先端のノズル
から高速回転する金属製ｏＩ＃Ｒ−ル又は双醇−ルＯ回
転画に噴出して急冷すゐ溶湯急にして作製され九薄帯の
表面には黴細な凹凸が存在し−その凹凸の状態によって
は高周波領域での鉄１１１１が増大したシ、また、占積
率が著しく小さくなるなどの実用面におけゐ不都合を招
くことがありた。On the other hand, ribbons of amorphous magnetic alloys are usually produced by melting a molten alloy of a predetermined composition in a heat-resistant S container such as quartz. The molten metal is spouted onto a rotating metal oI#R-ru or twin molten metal revolving picture and quenched.There are moldy unevenness on the surface of the 9-thin ribbon.Depending on the condition of the unevenness, In this case, the amount of iron 1111 increases in the high frequency range, and the space factor becomes extremely small, which may cause practical problems.
本Ｉｌｌ明者らは、高周波領域、とシわけｌＯ〜２００
ＫＨｚ （）高周波領域Ｋかける非晶質磁性合金の薄帯
の表面凹凸状Ｉｔ（表面粗さ）と鉄損の関係について鋭
意研究を重ねえ結果、該薄帯の厚み最大値と厚み平均値
とから算出して表示される表面粗さが所定Ｏ値以下のと
き、また、厚み最大値が所定の範１１にあ為と自その鉄
損が小さくなるとの事実を見出し・本発明を完成するに
到った。In this article, we will discuss the high frequency region, which is divided into 10~200
KHz () After extensive research into the relationship between the high frequency region K multiplied by the surface unevenness It (surface roughness) of a ribbon of amorphous magnetic alloy and iron loss, we found that the maximum thickness, average thickness, and In order to complete the present invention, we discovered the fact that when the surface roughness calculated and displayed is below a predetermined O value, and the maximum thickness falls within a predetermined range 11, the iron loss decreases. It has arrived.
本発−は、高周波領域において鉄損が著しく小１い非晶
質磁性合金Ｏ磁心を提供することに目的がある。The object of the present invention is to provide an amorphous magnetic alloy O magnetic core with extremely low iron loss in a high frequency region.
本発明の磁心は、非晶質′磁性合金薄帯から成ゐ磁心で
あって、式：（＊−Ｔ）７ｔ≦０．３０Ｃ式中、１゜ｉ
はそれヤれ骸薄帯の厚み最大値、厚み平均値を表わし、
かつ、■は式：’ＵｚＷ／４−４．−（ただし、ｗ、
ｄ、ｔ 、ｐ は−ｔ−れ（’れｌ［帯Ｏ重量 ｓ。The magnetic core of the present invention is a magnetic core made of an amorphous magnetic alloy ribbon, and has the following formula: (*-T)7t≦0.30C, where 1°i
represents the maximum thickness and average thickness of the thin strip,
And ■ is the formula: 'UzW/4-4. −(However, w,
d, t, p are -t-re('rel [band O weight s.
長さ、密度を表わす、）として表わされる。〕で示され
る表面粗さを満足することを特徴とする。It is expressed as ), which represents length and density. It is characterized by satisfying the surface roughness shown in ].
本発明の磁心において、それを構成する非晶質磁性合金
は一般に１１４＠−、ＮｚＯ組成式で表わされる。In the magnetic core of the present invention, the amorphous magnetic alloy constituting it is generally represented by the composition formula 114@-, NzO.
ここで、ＭはＦｅ 、 Ｃ＠ 、 Ｎ１のうちの少くと
も！種ｏ元素”ｔ”あり、その一部はＴＩ 、 Ｖ 、
Ｃｒ 、 ｂｏｘｓ 、Ｃ＠。Here, M is at least Fe, C@, N1! There are species o elements "t", some of which are TI, V,
Cr, boxes, C@.
Ｚｒ 、 Ｎｂ 、 Ｍｏ 、 Ｔ麿、Ｗの群から選ば
れる少くとも１種の元素で１−１０原子チ置換されてい
てもよい。1 to 10 atoms may be substituted with at least one element selected from the group consisting of Zr, Nb, Mo, T, and W.
ＮはＰ、Ｃ，Ｂ、８１ 、ＡＡ、Ｇ＠などのメタロイド
の少くとも１種の元素であり、２は１５＜Ｚ＜ＳＧを満
足する数である。N is at least one element of metalloid such as P, C, B, 81, AA, G@, and 2 is a number satisfying 15<Z<SG.
このような非晶質磁性合金は、上配し九Ｍ、Ｎの各成分
を所定の割合いで混合した後、溶融し、これを溶湯急冷
法などの方法によって非晶質磁性合金化し、ついで無磁
場中で所定の温度（例えば、４００〜４５０℃）に加熱
処理して容易に作製することができる。Such an amorphous magnetic alloy is produced by mixing the upper M and N components in predetermined proportions, melting the mixture, forming an amorphous magnetic alloy by a method such as a molten metal rapid cooling method, and then forming an amorphous magnetic alloy. It can be easily produced by heat treatment to a predetermined temperature (for example, 400 to 450°C) in a magnetic field.
本発明の磁心は非晶質磁性合金Ｏ薄帯である。The magnetic core of the present invention is an amorphous magnetic alloy O ribbon.
骸薄帯鉱、その厚与最大値を１１厚み平均値を１とした
とき、ｔ＊−７）／ｌで表示される表面粗さがＯ，Ｓ
Ｏ以下の値であ為ことをｌｌｌ１徴とする。The surface roughness expressed as t*-7)/l is O, S when the maximum value of thickness is 11 and the average value of thickness is 1.
A value less than or equal to O is considered to be a symptom.
ζζでｔは諌薄帯に関する実測値として求められ、■は
鋏薄帯Ｏ重量１幅、長さ、密度をそれぞれｗ、ａ、ｚ、
−としたときに、ｉＭＩ−Ｗ／ａ−ｔ−ｐＯ式から算ａ
Ｓされ為計算値である。In ζζ, t is obtained as an actual measurement value for the scissor ribbon, and ■ is the width, length, and density of the scissor ribbon O, respectively, as w, a, z,
-, calculated from the iMI-W/a-t-pO formula a
This is a calculated value because S is applied.
ヒｏｔｉ−ｔ＞／ｌの値が、ｏ、ｓｏを超えると諌薄帯
の表面凹凸の状態が顕著に１にル（表面が粗（な））、
高周波領域でＯ鉄損が着しく大きくなって使用に適′Ｓ
なくなる。When the value of hoti-t>/l exceeds o and so, the state of the surface unevenness of the strip is noticeably reduced to 1 (the surface is rough),
In the high frequency range, the iron loss becomes significantly large, making it unsuitable for use.
It disappears.
ｔえ、腋薄帯にあって、厚み最大値（０がＢｋｇ未満Ｏ
場合には、得られた磁心の巻回時において層間絶縁体を
大量に必要とすｉｈ九めその占積率が着しく低下し実用
的でなくなる。更に、電が３０−を曹えると表面粗さに
関係なく高周波領域におけ為鉄損が着しく増大する。し
たがりで、本発明ａｍ心にありては、そＯ薄帯の厚み最
大値がｓＪｗＩＩＩＢ≦１≦３・ｊｍＯ颯■に設定すゐ
ことが好ましい。It is located in the axillary thin band and has the maximum thickness (0 is less than Bkg).
In this case, a large amount of interlayer insulating material is required when winding the obtained magnetic core, and the space factor of the IH material decreases considerably, making it impractical. Furthermore, when the current exceeds 30 -, the iron loss increases significantly in the high frequency range, regardless of the surface roughness. Therefore, in accordance with the present invention, it is preferable that the maximum thickness of the ribbon be set to sJwIIIB≦1≦3·jmO.
本発＠０８心は、１０〜２００ＫＨ薦の動作周掖数にあ
って特に鉄損を小すくシて有効でああ。The current @08 core has a recommended operating frequency of 10 to 200 KH and is particularly effective in reducing iron loss.
本発明の磁心を構成すゐ薄帯の厚み最大値は、溶湯急冷
法にあっては、目−ルの回転数、溶融合金をノズルから
噴出するときに該溶融合金に印加するガス圧などを調整
し、また、表面粗さは更にノズルとｐ−ルとの間隔を０
．１〜０．５ｍの範囲内で調整することによって適宜な
値にすることがで龜る。In the molten metal quenching method, the maximum thickness of the ribbon constituting the magnetic core of the present invention is determined by the number of rotations of the eye, the gas pressure applied to the molten alloy when it is jetted from the nozzle, etc. Adjust the surface roughness by adjusting the distance between the nozzle and the p-ru to 0.
．． By adjusting within the range of 1 to 0.5 m, it becomes easier to obtain an appropriate value.
以下に、本発明を実施例に基づいて説明すみ。The present invention will be explained below based on examples.
実施例１
表に示した各種組成の非晶質磁性合金の薄帯を溶湯急冷
法で作製した。すなわち、高速回転する単四−ルＯ上に
石英管ノズルから各種組成の溶融合金をアルゴンガス圧
で噴出せしめて急冷し、幅す一１長″５ｔｏｏ＠−〇薄
帯試料を作製した。このと亀、冒−ル回転数、ガス圧、
ノズルと■−ル間の距離を種々に変動せしめて、厚み最
大値、表面粗さを変化させ喪。Example 1 Ribbons of amorphous magnetic alloys having various compositions shown in the table were produced by a molten metal quenching method. That is, molten alloys of various compositions were jetted out from a quartz tube nozzle under argon gas pressure onto a high-speed rotating AAA tube nozzle and quenched, thereby producing ribbon samples with a width of 1" and a length of 5". Tortoise, rotation speed, gas pressure,
By varying the distance between the nozzle and ■-ru, the maximum thickness and surface roughness can be changed.
薄帯試料から長さ１４ｓＢを切口０１それを直ａｇｏ■
のアル電す製ボビンに巻きつけ、金一体を４００Ｃ”ｔ
’ｌＳ分間熱処理シタ後、内１１２０ｍ、外ａＳ・−〇
プラスチツタケースに入れて１次コイル、２次コイルと
してともに７０回巻き、ワットメータを用いて磁束密度
（８ｍ）３ＫＧ、周波数ｇ Ｑ ＫＨｚ、１０１００１
Ｇ（＞ける鉄損を測定した。Cut a length of 14 sB from a ribbon sample and cut it directly into the ago■
Wrap it around a bobbin made by Arudensu, and use 400C”t of gold.
After heat treatment for 1S minutes, inner 1120m, outer aS -〇Put in a plastic case and wind both primary and secondary coils 70 times. Using a wattmeter, measure magnetic flux density (8m) 3KG, frequency g Q KHz. , 101001
The iron loss was measured.
また、薄帯試料の飽和磁束密度を試料振動形磁力針を用
いて測定し良、結果を一括して表に示した。In addition, the saturation magnetic flux density of the ribbon sample was measured using a sample vibrating magnetic needle, and the results are summarized in the table.
表から明らかなように、本発明にかかみ薄帯試料（試料
番号風〜・）社、比較例薄帯試料（試料１号７．８）に
比べ、磁束密度３ＫＧ、周波数２０ＫＨｚ％１００ Ｋ
Ｈｚにおける鉄損が著しく小さいことが判明しえ。As is clear from the table, the present invention has a magnetic flux density of 3 KG and a frequency of 20 KHz% 100 K compared to the ribbon sample of the present invention (sample number Kaze~) and the comparative ribbon sample (sample No. 1 7.8).
It turns out that the iron loss at Hz is significantly smaller.
実施例型
組成（Ｆｅ−組・ｓ ｈｓ ８１・Ｂ鳳４の非晶質磁性
合金の薄帯から成）、表面粗さを種々に変化させた磁心
にりいて、磁束密度５ＫＧ１周波数２０ＫＨ震、１００
ＫＨｚ Ｋおける鉄損を測定した。その結果を、表面粗
さＯ関係として図に示した０図から明らかなように、表
面粗１ｉＩが０．１０ ｔ−超えると鉄損が急激に増大
することが判明した。The composition of the example type (consisting of thin strips of amorphous magnetic alloy of Fe-group, SHS 81, and B-4), and the magnetic core with various surface roughness, magnetic flux density of 5KG, frequency of 20KH, 100
Iron loss at KHz K was measured. As is clear from the graph showing the results as a relationship between surface roughness O, it was found that when the surface roughness 1iI exceeds 0.10 t-, the iron loss increases rapidly.
以上説明したように、本発明Ｏ非晶質磁性合金Ｏ薄帯か
ら成ゐ磁心祉、高周波領域でＯ鉄損が著しく小さくな〉
、シ九がって、高周波トランスなどＯ小１ｍ形状化を可
能とするのでその工業的価値は大である。As explained above, the magnetic core strength of the amorphous magnetic alloy according to the present invention made from the O ribbon, and the O iron loss are significantly reduced in the high frequency range.
Furthermore, it has great industrial value because it enables high-frequency transformers and other devices to be made into a 1 m diameter.
ＩＩ紘、組成（ν・・、・ＮＩＩ、寓）！−８轟・Ｂ１
４０非晶質磁性合金から成る磁心０表面粗さとに一８Ｋ
Ｇ、 ｆ−２＠ＩＧ（ｇ、１００和ｂＫおけ為鉄損との
関係図である。
表面粗々 −II Hiro, composition (ν...,・NII, fable)! -8 Todoroki B1
Magnetic core made of 40 amorphous magnetic alloy with surface roughness of 0 to -8K
G, f-2@IG (g, 100 sum bK is a relationship diagram with iron loss. Surface roughness -
Claims (1)
１−１）／＊≦０．３０ 〔式中、１．１はそれぞれ該薄帯の厚み最大値、厚み平
均値を表わし、かつ、ｉは式：％式％ （丸だし、ｗ、ａ、ｚ、）はそれぞれ骸薄帯Ｏ重量１幅
、長さ、＠度を表わす。）として表わされる。〕 で示される表面粗さを満足する高周波用非晶質磁性合金
ＯＳ心。 ゛ Ｌ ｔがｌｓ＃ｌＩＩ≦１≦３０−を満足する厚みであ
る４ＩＰＭ求ＯＳＳ第凰項記載の高周波用非晶質磁性合
金の磁心。[Claims] 1. A magnetic core consisting of an amorphous magnetic alloy ribbon, which has the formula: (
1-1)/*≦0.30 [In the formula, 1.1 represents the maximum thickness value and average thickness value of the ribbon, and i is the formula: % formula % (round, w, a, z , ) represent the weight, width, length, and degree of the thin ribbon O, respectively. ). ] An amorphous magnetic alloy OS core for high frequencies that satisfies the surface roughness shown by A magnetic core of an amorphous magnetic alloy for high frequency use as described in 4IPM Required OSS Item 3, wherein Lt has a thickness that satisfies ls#lII≦1≦30−.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56142252A JPS5844702A (en) | 1981-09-11 | 1981-09-11 | Magnetic core of amorphous magnetic alloy for high frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56142252A JPS5844702A (en) | 1981-09-11 | 1981-09-11 | Magnetic core of amorphous magnetic alloy for high frequency |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5323169A Division JP2506267B2 (en) | 1993-11-29 | 1993-11-29 | High frequency magnetic core manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5844702A true JPS5844702A (en) | 1983-03-15 |
| JPH0480523B2 JPH0480523B2 (en) | 1992-12-18 |
Family
ID=15310983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56142252A Granted JPS5844702A (en) | 1981-09-11 | 1981-09-11 | Magnetic core of amorphous magnetic alloy for high frequency |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5844702A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5963704A (en) * | 1982-10-05 | 1984-04-11 | Tdk Corp | Magnetic core for magnetic switch |
| JPS60164312A (en) * | 1984-02-07 | 1985-08-27 | Toshiba Corp | Reactor for semiconductor circuit |
| US5096513A (en) * | 1989-09-01 | 1992-03-17 | Kabushiki Kaisha Toshiba | Very thin soft magnetic alloy strips and magnetic core and electromagnetic apparatus made therefrom |
| US5622768A (en) * | 1992-01-13 | 1997-04-22 | Kabushiki Kaishi Toshiba | Magnetic core |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5483622A (en) * | 1977-12-16 | 1979-07-03 | Matsushita Electric Ind Co Ltd | Heat treatment method for amorphous magnetic alloy sheet |
| JPS5623714A (en) * | 1979-08-06 | 1981-03-06 | Hitachi Metals Ltd | Material for magnetic core |
-
1981
- 1981-09-11 JP JP56142252A patent/JPS5844702A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5483622A (en) * | 1977-12-16 | 1979-07-03 | Matsushita Electric Ind Co Ltd | Heat treatment method for amorphous magnetic alloy sheet |
| JPS5623714A (en) * | 1979-08-06 | 1981-03-06 | Hitachi Metals Ltd | Material for magnetic core |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5963704A (en) * | 1982-10-05 | 1984-04-11 | Tdk Corp | Magnetic core for magnetic switch |
| JPS60164312A (en) * | 1984-02-07 | 1985-08-27 | Toshiba Corp | Reactor for semiconductor circuit |
| US5096513A (en) * | 1989-09-01 | 1992-03-17 | Kabushiki Kaisha Toshiba | Very thin soft magnetic alloy strips and magnetic core and electromagnetic apparatus made therefrom |
| US5622768A (en) * | 1992-01-13 | 1997-04-22 | Kabushiki Kaishi Toshiba | Magnetic core |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0480523B2 (en) | 1992-12-18 |
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