JPS62211910A - Manufacture of magnetic core - Google Patents
Manufacture of magnetic coreInfo
- Publication number
- JPS62211910A JPS62211910A JP5524286A JP5524286A JPS62211910A JP S62211910 A JPS62211910 A JP S62211910A JP 5524286 A JP5524286 A JP 5524286A JP 5524286 A JP5524286 A JP 5524286A JP S62211910 A JPS62211910 A JP S62211910A
- Authority
- JP
- Japan
- Prior art keywords
- gap
- magnetic core
- magnetic
- resin
- core
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000011347 resin Substances 0.000 claims abstract description 28
- 229920005989 resin Polymers 0.000 claims abstract description 28
- 238000003475 lamination Methods 0.000 claims abstract description 10
- 239000000853 adhesive Substances 0.000 claims abstract description 9
- 230000001070 adhesive effect Effects 0.000 claims abstract description 9
- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 238000004804 winding Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 15
- 238000010030 laminating Methods 0.000 claims description 4
- 230000005389 magnetism Effects 0.000 claims 1
- 125000006850 spacer group Chemical group 0.000 abstract description 4
- 230000010355 oscillation Effects 0.000 abstract 2
- 238000005470 impregnation Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Landscapes
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は磁性コアの製造方法に係り、特に磁性体薄板を
積層・巻回して構成され、かつ積層方向に貫通するギャ
ップを有した磁性コアの製造方法に関する。[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention relates to a method for manufacturing a magnetic core, and particularly to a method for manufacturing a magnetic core, which is constructed by laminating and winding magnetic thin plates, and having a gap penetrating in the lamination direction. The present invention relates to a method of manufacturing a magnetic core having the following.
（従来の技術）
スイッチング電源における出力チョークコイル等におい
ては、第４図に示すようにアモルファス合金等からなる
磁性体薄板を積層して巻回し、積層方向に貫通するギャ
ップ２を形成した磁性コア１が使用される。このような
磁性コアは通常、磁性体薄板を積層・巻回した後、層間
に樹脂を含浸させ、しかる後にギャップ形成を行なうと
いう工程によって製造される。(Prior Art) In an output choke coil or the like in a switching power supply, as shown in FIG. 4, a magnetic core 1 is formed by laminating and winding magnetic thin plates made of an amorphous alloy or the like and forming a gap 2 passing through the lamination direction. is used. Such a magnetic core is usually manufactured by a process of laminating and winding magnetic thin plates, impregnating resin between the layers, and then forming a gap.
（発明が解決しようとする問題点）
上述した従来の磁性コアでは、例えばスイッチングミ源
における出力チョークコイルのように、電流が周期的に
オン、オフされる状態の下で使用すると、スイツヂング
周波数が数ｋｌ−１ｚというような可聴周波数の場合、
コアが振動して耳障りな騒音を発生するという問題があ
った。(Problems to be Solved by the Invention) When the above-mentioned conventional magnetic core is used under a condition where the current is periodically turned on and off, such as in an output choke coil in a switching power source, the switching frequency may change. In the case of an audible frequency such as several kl-1z,
There was a problem in that the core vibrated and generated harsh noise.
本発明者らは上述した騒音の発生メカニズムについて検
討したところ、コイルを介してコアに印加された磁場に
より、磁路方向にコアの伸縮（磁歪）が生じ、その伸縮
運動が、磁性体薄板がフリーの状態にあるギャップ部分
で積層方向の振動に変換されることが騒音発生の要因で
あることを究明した。The inventors investigated the mechanism of noise generation described above and found that the magnetic field applied to the core through the coil causes expansion and contraction (magnetostriction) of the core in the direction of the magnetic path, and this expansion and contraction movement causes the magnetic thin plate to It was determined that the cause of the noise was that the gap was converted into vibration in the lamination direction in the free state.
本発明はこのような従来の問題点を解決すべくなされた
もので、可聴周波数でコイルの電流がオン、オフされる
ような場合でも、不快な騒音の発生が少ない磁性コアの
製造方法を提供することを目的とする。The present invention has been made to solve these conventional problems, and provides a method for manufacturing a magnetic core that generates less unpleasant noise even when the current in the coil is turned on and off at an audible frequency. The purpose is to
［発明の構成］
（問題点を解決するための手段）
本発明は磁性体薄板を積層に巻回してなる磁性コアの層
間に樹脂を含浸させ、積層方向に貫通するギャップを形
成した後、該磁性コアのギャップ近傍部分を固定するこ
とを特徴とする。[Structure of the Invention] (Means for Solving the Problems) The present invention impregnates a resin between the layers of a magnetic core formed by winding magnetic thin plates in a laminated manner, forms a gap penetrating in the lamination direction, and then It is characterized by fixing the portion of the magnetic core near the gap.
ここで、磁性コアのギャップ近傍部分を固定する方法と
しては、例えば磁性コアの層間に再度樹脂を含浸させる
ことが有効である。Here, as a method for fixing the portion of the magnetic core near the gap, for example, it is effective to impregnate the resin between the layers of the magnetic core again.
磁性コアのギャップ近傍部分を固定する他の方法として
は、ギャップ近傍部分に接着剤を塗布する方法、あるい
はギャップ近傍部分を磁性体薄板の積層方向両側から非
磁性体の固定部材で挟む方法が挙げられる。Other methods for fixing the portion of the magnetic core near the gap include applying adhesive to the portion near the gap, or sandwiching the portion near the gap between non-magnetic fixing members from both sides in the stacking direction of the magnetic thin plates. It will be done.
（作用）
磁性体薄板を積層・巻回した磁性コアの層間に樹脂を含
浸させた後、積層方向に貫通するギャップを形成すると
、ギャップ近傍部分の層間の樹脂が剥離してしまい、磁
性体薄板がフリーの状態となって振動を起こし易くなる
が、本発明に基づいて該磁性コアのギャップ近傍部分を
強制的に固定すると、コアに印加された磁場による磁路
方向のコアの伸縮があっても、騒音発生の要因となる磁
性体薄板のギャップ部分での積層方向における振動が抑
制される。(Function) If a gap is formed that penetrates in the lamination direction after impregnating resin between the layers of a magnetic core made of laminated and wound magnetic thin plates, the resin between the layers in the vicinity of the gap will peel off, causing the magnetic thin plates to However, if the portion of the magnetic core near the gap is forcibly fixed based on the present invention, the core will expand and contract in the direction of the magnetic path due to the magnetic field applied to the core. Also, vibration in the stacking direction at the gap between the thin magnetic plates, which causes noise generation, is suppressed.
（実施例）
第１図を参照して本発明の一実施例に係る磁性コアの製
造方法を説明する。まず、第１図（ａ＞に示すようにア
モルファス合金等からなる磁性体薄板１１を積層し、例
えば第４図に示したようなトロイダル形状に巻回した後
、樹脂含浸を施す。(Example) A method for manufacturing a magnetic core according to an example of the present invention will be described with reference to FIG. First, as shown in FIG. 1 (a), magnetic thin plates 11 made of an amorphous alloy or the like are laminated and wound into a toroidal shape as shown in FIG. 4, for example, and then impregnated with resin.
樹脂含浸とは負圧を利用して間隙内部に樹脂を含浸させ
る方法であり、この工程により第１図（ａ）に示すよう
に磁性体薄板１１の層間に樹脂１２が一様に含浸される
。Resin impregnation is a method of impregnating resin into the gap using negative pressure, and through this process, the resin 12 is uniformly impregnated between the layers of the magnetic thin plate 11, as shown in FIG. 1(a). .
次に、第１図に（ｂ）に示すように、磁性薄板１１の積
層方向に貫通するギャップ１３を形成する。ギャップ１
３の形成は、例えば適当なカッターを使用して行なえば
よい。ここで、ギャップ１３を形成した後の状態を見る
と、含浸した樹脂１２はギャップ１３の近傍部分におけ
る磁性薄板１１の層間では、第１図（ｂ）の１４に示し
たように剥離し脱落している。Next, as shown in FIG. 1(b), a gap 13 penetrating the magnetic thin plates 11 in the stacking direction is formed. gap 1
3 may be formed using, for example, a suitable cutter. Here, looking at the state after forming the gap 13, the impregnated resin 12 peels off and falls off between the layers of the magnetic thin plate 11 in the vicinity of the gap 13, as shown at 14 in FIG. 1(b). ing.
次に、第１図（Ｃ）に示すように、ギャップ・１３内に
薄い非磁性体板からなるスペーサ１５を挿入し、接着剤
１６により固定する。従来の磁性体コアの製造工程は、
この第１図（Ｃ）の工程までであったが、本実施例では
樹脂含浸を再度行なう。この２度目の樹脂含浸の結果、
第１図（ｄ）に示すように、第１図（ｂ）（ｃ）におけ
る樹脂１２の脱落部１４にも樹脂が含浸されることによ
り、磁性体薄板１１のギャップ１３の近傍部分が磁性体
薄板１１の積層方向において強固に固定される。Next, as shown in FIG. 1(C), a spacer 15 made of a thin non-magnetic plate is inserted into the gap 13 and fixed with an adhesive 16. The conventional manufacturing process for magnetic cores is
Although the process up to the step shown in FIG. 1(C) was performed, in this example, resin impregnation is performed again. As a result of this second resin impregnation,
As shown in FIG. 1(d), the part 14 of the resin 12 that has fallen off in FIGS. 1(b) and 1(c) is also impregnated with the resin, so that the portion of the magnetic thin plate 11 near the gap 13 is made of magnetic material. The thin plates 11 are firmly fixed in the stacking direction.
従って、磁性コアに巻かれたコイルに通電を断続的に行
なった場合に、コアが磁場の印加により磁路方向に伸縮
を生じても、それに伴なうギャップ１３の近傍における
磁性薄板１１の振動は効果的に抑制され、騒音の発生が
著しく減少する。実験によると、樹脂含浸が最初の１回
のみの従来技術に基づく磁性コアが発生する騒音の大き
さは約７０ｄＢであったのに対して、上述したギャップ
１３の形成後に再度樹脂含浸を行なった本発明に６一
基づく磁性コアが発生する騒音の大きさは、同じ動作条
件下で約４５ｄＢと、大きく低減した。Therefore, when the coil wound around the magnetic core is intermittently energized, even if the core expands and contracts in the direction of the magnetic path due to the application of a magnetic field, the accompanying vibration of the magnetic thin plate 11 in the vicinity of the gap 13 is effectively suppressed and noise generation is significantly reduced. According to experiments, the level of noise generated by a magnetic core based on the conventional technology in which resin impregnation was performed only once at the beginning was approximately 70 dB, whereas resin impregnation was performed again after the above-mentioned gap 13 was formed. The magnitude of the noise generated by the magnetic core according to the present invention was significantly reduced to approximately 45 dB under the same operating conditions.
上記実施例ではギャップ形成後、再度樹脂含浸を行なう
ことにより、コアのギャップ近傍部分を固定したが、他
の実施例として第２図に示すようにコアのギャップ近傍
部分に、第１図におけるスペーサ１５を固定するための
接着剤１６とは別に接着剤１８（例えば樹脂系接着剤）
を塗布してもよい。In the above embodiment, after the gap was formed, the core was impregnated with resin again to fix the core near the gap, but in another embodiment, as shown in FIG. 2, the spacer shown in FIG. 1 was fixed in the core near the gap. Adhesive 18 (for example, resin adhesive) in addition to adhesive 16 for fixing 15
may be applied.
また、他の実施例として第３図に示すようにコアのギャ
ップ近傍部分を、例えばアルミニウムのような非磁性体
からなる板状の固定部材１９により、磁性体薄板の積層
方向両側から挟むようにしてもよい。As another embodiment, as shown in FIG. 3, the core near the gap may be sandwiched between plate-shaped fixing members 19 made of a non-magnetic material such as aluminum from both sides in the stacking direction of the magnetic thin plates. good.
これらいずれの実施例によっても、前記実施例と同様の
騒音低減効果が得られる。本発明はその他、要旨を逸脱
しない範囲で種々変形して実施することが可能である。In any of these embodiments, the same noise reduction effect as in the previous embodiment can be obtained. The present invention can be implemented with various other modifications without departing from the scope of the invention.
［発明の効果］
本発明に係る磁性コアの製造方法によれば、コイルの電
流が可聴周波数でオン、オフされるようなスイッチング
電源等に使用しても、騒音の発生が少ない磁性コアを得
ることができる。[Effects of the Invention] According to the method for manufacturing a magnetic core according to the present invention, a magnetic core that generates little noise can be obtained even when used in a switching power supply where the coil current is turned on and off at an audible frequency. be able to.
第１図（ａ）〜（ｄ）は本発明の一実施例に係る磁性コ
アの製造方法を説明するための工程図、第２図＜ａ）（
ｂ）は本発明の他の実施例を説明するための平面図およ
びギャップ近傍部分を拡大して示す図、第３図は同じく
本発明の他の実施例を説明するための平面図およびギャ
ップ近傍部分を拡大して示す図、第４図は本発明が対象
とする磁性コアを説明するだめの平面図である。
１・・・磁性コア、２・・・ギャップ、１１・・・磁性
体薄板、１２・・・樹脂、１３・・・ギャップ、１４・
・・樹脂の脱落部、１５・・・スペーサ、１６・・・接
着剤、１７・・・樹脂、１８・・・接着剤、１つ・・・
固定部材。
出願人代理人 弁理士 鈴江武彦
＾ へ１′ＩｊＤ
（ａ）
第２
（ａ）
第３
（ｂ）
図FIGS. 1(a) to (d) are process diagrams for explaining a method of manufacturing a magnetic core according to an embodiment of the present invention, and FIG. 2(a) (
b) is a plan view for explaining another embodiment of the present invention and an enlarged view showing a portion near the gap; FIG. 3 is a plan view for explaining another embodiment of the present invention and a diagram showing the vicinity of the gap FIG. 4, which is a partially enlarged view, is a plan view for explaining the magnetic core to which the present invention is directed. DESCRIPTION OF SYMBOLS 1... Magnetic core, 2... Gap, 11... Magnetic thin plate, 12... Resin, 13... Gap, 14...
...Resin falling part, 15...Spacer, 16...Adhesive, 17...Resin, 18...Adhesive, one...
Fixed member. Applicant's agent Patent attorney Takehiko Suzue 1'IjD (a) 2nd (a) 3rd (b) Figure
Claims (4)
に樹脂を含浸させ、積層方向に貫通するギャップを形成
した後、該磁性コアのギャップ近傍部分を固定すること
を特徴とする磁性コアの製造方法。(1) Magnetism characterized by impregnating resin between the layers of a magnetic core formed by laminating and winding magnetic thin plates to form a gap penetrating in the lamination direction, and then fixing a portion of the magnetic core near the gap. Core manufacturing method.
に、前記磁性コアの層間に再度樹脂を含浸させることを
特徴とする特許請求の範囲第１項記載の磁性コアの製造
方法。(2) The method for manufacturing a magnetic core according to claim 1, characterized in that in order to fix a portion of the magnetic core near the gap, resin is again impregnated between the layers of the magnetic core.
に、ギャップ近傍部分に接着剤を塗布することを特徴と
する特許請求の範囲第１項記載の磁性コアの製造方法。(3) The method for manufacturing a magnetic core according to claim 1, characterized in that an adhesive is applied to a portion of the magnetic core near the gap in order to fix the portion of the magnetic core near the gap.
に、ギャップ近傍部分を前記磁性体薄板の積層方向両側
から非磁性体の固定部材で挟むことを特徴とする特許請
求の範囲第１項記載の磁性コアの製造方法。(4) In order to fix the portion of the magnetic core near the gap, the portion near the gap is sandwiched between non-magnetic fixing members from both sides in the stacking direction of the thin magnetic plates. A method for manufacturing a magnetic core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61055242A JPH0666209B2 (en) | 1986-03-13 | 1986-03-13 | Method of manufacturing magnetic core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61055242A JPH0666209B2 (en) | 1986-03-13 | 1986-03-13 | Method of manufacturing magnetic core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62211910A true JPS62211910A (en) | 1987-09-17 |
| JPH0666209B2 JPH0666209B2 (en) | 1994-08-24 |
Family
ID=12993124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61055242A Expired - Lifetime JPH0666209B2 (en) | 1986-03-13 | 1986-03-13 | Method of manufacturing magnetic core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0666209B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01145114U (en) * | 1988-03-30 | 1989-10-05 | ||
| JP2011134794A (en) * | 2009-12-22 | 2011-07-07 | Takaoka Kasei Kogyo Kk | Winding core and method of assembling the same |
| JP2011243792A (en) * | 2010-05-19 | 2011-12-01 | Takaoka Kasei Kogyo Kk | Wound core |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5329527A (en) * | 1976-08-31 | 1978-03-18 | Mitsubishi Electric Corp | Rolled core with gap |
| JPS59189610A (en) * | 1983-04-13 | 1984-10-27 | Hitachi Metals Ltd | Amorphous wound magnetic core |
| JPS61204908A (en) * | 1985-03-08 | 1986-09-11 | Hitachi Metals Ltd | Magnetic core |
| JPS61157313U (en) * | 1985-03-22 | 1986-09-30 | ||
| JPS61174718U (en) * | 1985-04-22 | 1986-10-30 |
-
1986
- 1986-03-13 JP JP61055242A patent/JPH0666209B2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5329527A (en) * | 1976-08-31 | 1978-03-18 | Mitsubishi Electric Corp | Rolled core with gap |
| JPS59189610A (en) * | 1983-04-13 | 1984-10-27 | Hitachi Metals Ltd | Amorphous wound magnetic core |
| JPS61204908A (en) * | 1985-03-08 | 1986-09-11 | Hitachi Metals Ltd | Magnetic core |
| JPS61157313U (en) * | 1985-03-22 | 1986-09-30 | ||
| JPS61174718U (en) * | 1985-04-22 | 1986-10-30 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01145114U (en) * | 1988-03-30 | 1989-10-05 | ||
| JP2011134794A (en) * | 2009-12-22 | 2011-07-07 | Takaoka Kasei Kogyo Kk | Winding core and method of assembling the same |
| JP2011243792A (en) * | 2010-05-19 | 2011-12-01 | Takaoka Kasei Kogyo Kk | Wound core |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0666209B2 (en) | 1994-08-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |