JPS62171437A - Coil and its manufacture - Google Patents
Coil and its manufactureInfo
- Publication number
- JPS62171437A JPS62171437A JP999986A JP999986A JPS62171437A JP S62171437 A JPS62171437 A JP S62171437A JP 999986 A JP999986 A JP 999986A JP 999986 A JP999986 A JP 999986A JP S62171437 A JPS62171437 A JP S62171437A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- core material
- terminal
- terminals
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 238000000034 method Methods 0.000 claims abstract description 35
- 239000004020 conductor Substances 0.000 claims abstract description 15
- 238000000465 moulding Methods 0.000 claims abstract description 13
- 238000004804 winding Methods 0.000 claims abstract description 12
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims abstract 3
- 238000000576 coating method Methods 0.000 claims abstract 3
- 239000011162 core material Substances 0.000 claims description 27
- 229920005989 resin Polymers 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 238000005476 soldering Methods 0.000 abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 239000010949 copper Substances 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 abstract description 3
- 238000003825 pressing Methods 0.000 abstract description 2
- 239000007767 bonding agent Substances 0.000 abstract 1
- 229910000679 solder Inorganic materials 0.000 abstract 1
- 238000005266 casting Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- -1 etc. Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920006389 polyphenyl polymer Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Windings For Motors And Generators (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発明はコイル及びその製造方法に係り、特に小形モ
ータなどの電機子の製造に好適な方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a coil and a method for manufacturing the same, and particularly to a method suitable for manufacturing an armature such as a small motor.
フラットモータ（扁平モータ）はダイレ汐りトドライブ
タイプのレコードプレーヤ用モータ、オデオ、ビデオ機
器、フロッピンディスク用モータ。Flat motors are direct drive type record player motors, audio and video equipment, and floppy disc motors.
その他、家電機器、産業用機器などに用いられているこ
と周知である。これらの家電製品、ＯＡ機器は小形化、
可搬性、高性能の向上等の要＊に基づき普及している。In addition, it is well known that it is used in home appliances, industrial equipment, etc. These home appliances and OA equipment are becoming smaller and
It is becoming popular based on key factors such as improved portability and high performance.
とくに量産品に多用されつ＼ある。このようなことから
生産性の向上１歩留り。It is being used especially in mass-produced products. Because of this, productivity can be improved by one yield.
量産技術の確立、性能特性の向上が要求されている。従
来電子コイルの形状は断面丸状、又は平角状の絶縁被覆
線を捲回してコイルとしている。最近の技術では捲回し
たコイルをモールドする技術が開発されている。There is a need to establish mass production technology and improve performance characteristics. Conventionally, electronic coils are formed by winding an insulated wire with a round or rectangular cross section. Recently, a technology has been developed to mold a wound coil.
しかしながら、絶縁被覆線を捲回してコイル化する方法
は精密／」・形モータコイル製作後、基板端子との接続
に多くの時間と精度の問題があった。However, the method of winding the insulated wire to form a coil is very precise, and after manufacturing the motor coil, it takes a lot of time and requires precision to connect to the board terminals.
コイル製作後注形等モールド化している技術が公開され
ているがその改喪が望まれている。The technology of molding, such as casting after coil production, has been disclosed, but it is hoped that it will be revised.
本発明は、上記の点に対してなされたもので。 The present invention has been made in view of the above points.
小形化すればする程困難なコイルの端子と基板接続を簡
単し、しかも、高トルクコイル及びその製造を可能とす
るコイルの製造方法を提供するものである。To provide a coil manufacturing method that simplifies the connection between a coil terminal and a board, which is difficult as the size is reduced, and also enables high torque coil and manufacturing thereof.
本発明のコイルの製造方法は、断面円形の芯材のまわり
に導体板を捲回したのち端子を接続し、これら芯材及び
端子を位置決め基準として、扇形筒状体を得るための加
圧工程、複数の扇形筒状体をモールド成形により一体化
するための樹脂成形工程等の後工程を行うようにしたも
のである。The method for manufacturing a coil of the present invention includes a pressurizing process in which a conductor plate is wound around a core material having a circular cross section, terminals are connected, and a fan-shaped cylindrical body is obtained using these core materials and terminals as positioning standards. , a post-process such as a resin molding process for integrating a plurality of fan-shaped cylindrical bodies by molding is performed.
また、本発明のコイルは、外周部に端子が連接されたモ
ールド部にほぼ扇形をなす複数のモールドスライスコイ
ルを等配して保持させたものである。Further, the coil of the present invention has a plurality of substantially sector-shaped molded slice coils equally distributed and held in a molded portion having terminals connected to the outer periphery thereof.
以下１本発明の一実施例を図面を参照して詳述する。 An embodiment of the present invention will be described below in detail with reference to the drawings.
この実施例のコイルの製造方法は、第１図及び第２図に
示すように１例えば厚さ１８μｍ、例えば１５０℃の電
気炉にて表面に均一な酸化被膜が形成された大きさ８０
ｍＸ２．５ｍの圧延鋼箔板上にエポキシ樹脂などの絶縁
性接着層を設けてなる導体板（１）を例えば直径４龍の
無酸素鋼パイプからなる芯材（２）に接着剤を１０〜２
０μｍ程度に薄く塗布しつつ１００回程捲回し筒状体（
３）を成形する捲回工程と、筒状体（３）の外周面に円
往状の端子（４）を筒状体（３）の細心方向と平行とな
るようにはんだ付けにより接続する端子接続工程（第３
図参照）と、一対の成形具（５）。As shown in FIGS. 1 and 2, the manufacturing method of the coil of this embodiment is as follows:
A conductor plate (1) made of a rolled steel foil plate of 2.5 m x 2.5 m with an insulating adhesive layer such as epoxy resin is coated with an adhesive for 10 to 10 minutes to a core material (2) of an oxygen-free steel pipe with a diameter of 4 mm. 2
The cylindrical body (
3) and a terminal in which a circular terminal (4) is connected to the outer peripheral surface of the cylindrical body (3) by soldering so as to be parallel to the fine direction of the cylindrical body (3). Connection process (3rd
(see figure) and a pair of forming tools (5).
（６）により筒状体（３）を挟圧して３〜５ ｔｏｎで
加圧し筒状体（３）を横断面が扇形の成形体（力を得る
加圧工程（第４図及び第５図参照）と、成形体（７）・
・・を４〜９個等配してモールド型（図示せず）に配置
しこのモールド型にモールド剤に浸漬してモールド体（
８）を得る注形工程（第６図参照）と、モールド体（８
）を細心方向に直角方向にワイヤーソー又はバンドソー
を用いてスライスしてモールドスライスコイル（９）・
・・を得るスライス工程と、モールドスライスコイル（
９）をフラットモータ用の基板ＣＩＯ＋にはんだ付けに
より装着する組立工程（第７図参照）とからなっている
。しかして、捲回工程においては。(6), the cylindrical body (3) is compressed to a pressure of 3 to 5 tons, and the cylindrical body (3) is formed into a molded body with a fan-shaped cross section (pressing process to obtain force (see Figs. 4 and 5). ) and the molded body (7).
4 to 9 pieces are arranged equally in a mold (not shown), and the mold is immersed in a molding agent to form a mold body (
8) and the casting process (see Figure 6) to obtain the molded body (8).
) in a direction perpendicular to the fine direction using a wire saw or a band saw to make a molded slice coil (9).
The slicing process to obtain ... and the molded slicing coil (
9) to the flat motor board CIO+ by soldering (see FIG. 7). However, in the winding process.
芯材（２）の長さは導体板（１）の幅よりも長＜、シた
がって芯材（２）の両端は、筒状体（３）から所定量突
出するように捲回が行れるようになっている。また。The length of the core material (2) is longer than the width of the conductor plate (1), so both ends of the core material (2) are wound so that they protrude a predetermined amount from the cylindrical body (3). It is now possible to Also.
端子（４）の長さも、筒状体（３）の長さよりも長く、
端子（４）の両端が筒状体（３）の両端面より突出する
ように部子接続が行れるようになっている。さらに。The length of the terminal (4) is also longer than the length of the cylindrical body (3),
The components can be connected so that both ends of the terminal (4) protrude from both end surfaces of the cylindrical body (3). moreover.
成形具（５）は、下部用のものであり、直方体をなし。The forming tool (5) is for the lower part and has a rectangular parallelepiped shape.
７字溝（Ｌｌ）が形成されている。他方、成形具（６）
は。A figure 7 groove (Ll) is formed. On the other hand, the forming tool (6)
teeth.
上部用のものであり平板状をなしている。しかして、加
圧工程においては、まず筒状体（３）をＶｆ−溝顛中に
載置したのち、端子が成形共（５）の上面ａりに接触す
るように位置決めを行う。上記Ｖ字溝α＠の深さは、ｖ
Ｊ状体（３）の半径よりも小さく設定する。It is for the upper part and has a flat plate shape. Therefore, in the pressurizing step, the cylindrical body (3) is first placed in the Vf groove, and then positioned so that the terminal contacts the upper surface a of the molded body (5). The depth of the above V-shaped groove α@ is v
The radius is set smaller than the radius of the J-shaped body (3).
したがって、筒状体（３）は１位置決め時において。Therefore, the cylindrical body (3) is in one position.
その半分以上が、上面αυから出ている状態である。More than half of it is protruding from the upper surface αυ.
この位置決め終了後、成形具（６）を矢印（２）方向に
加圧し、前記成形体（７）を得る。この成形体（力にお
ける端子（４）の取付位置は、前述の位置決めにより。After this positioning is completed, the molding tool (6) is pressed in the direction of arrow (2) to obtain the molded body (7). The mounting position of the terminal (4) in this molded body (forced) is determined by the positioning described above.
所定位置となっている。また、成形体（７）の両端部に
おいて突出している芯材（２）は、加圧を受けず丸形の
ままである。この芯材（２）と端子（４）との位置精度
は、０．１〜０．２闘の範囲となるように、捲回工程及
び端子接続工程において調整する。しかして。It is in place. Further, the core material (2) protruding from both ends of the molded body (7) remains round without being pressurized. The positional accuracy between the core material (2) and the terminal (4) is adjusted in the winding process and the terminal connection process so that it is within the range of 0.1 to 0.2 degrees. However.
次の注形工程においては、芯材（２）と端子（４）とを
基準にしてモールド型に配列する。つまり、第６図に示
すように、成形体（７）の扇頂部分が求心方向をむくよ
うに配列する。モールド剤としては、エポキシ樹脂、ポ
リイミド、ポリフェニールサルファイド等の固着剤にメ
ルク、ガラス、金属酸化物等の充填材を混合したもので
ある。さらに１組立工程においては、モールド体（８）
の芯材（２）・・・と端子（４）・・・が、基板（１０
）における端子（１３）・・・、（４）・・・に対応し
て。In the next casting step, the core material (2) and the terminals (4) are arranged in a mold with reference to them. That is, as shown in FIG. 6, the fan top portions of the molded bodies (7) are arranged so as to face the centripetal direction. The molding agent is a mixture of a fixing agent such as epoxy resin, polyimide, polyphenyl sulfide, etc., and a filler such as Merck, glass, metal oxide, etc. Furthermore, in one assembly process, the mold body (8)
The core material (2)... and the terminal (4)... are connected to the board (10
) in correspondence to terminals (13)..., (4)...
同一の位置関係をもってあらかじめ設定されているので
、接続がすこぶる容易となる。Since they are preset with the same positional relationship, connection is extremely easy.
以上のように、この実施例のコイルの製造方法は、芯材
（２）を中心に導体板（１）を捲回したのち、芯材（２
）と一定の位置関係に端子（４）を取付け、これら芯材
（２）及び端子（４）を基準として、前記加圧工程、注
形工程及び組立工程を行うようにしている。したがって
、コイルの設定位置精度が向上し、基板α■への組込み
を高精度で行うことができるようになるとともに、磁気
特性が向上する。とくに、芯材（２）として、断面円形
のものを用いているので。As described above, the method for manufacturing the coil of this example involves winding the conductor plate (1) around the core material (2), and then winding the conductor plate (1) around the core material (2).
) and the terminal (4) is attached in a fixed positional relationship with the core material (2) and the terminal (4), and the above-mentioned pressurizing process, casting process, and assembly process are performed with these core material (2) and terminal (4) as a reference. Therefore, the precision of the positioning of the coil is improved, and it becomes possible to incorporate the coil into the substrate α■ with high precision, and the magnetic properties are improved. Especially since a core material (2) with a circular cross section is used.
捲回作業が容易となることはもとより、端子（４）と芯
材（２）との位置精度誤差が０．１〜０．２ｍ１１以下
となり。Not only does the winding work become easier, but the positional accuracy error between the terminal (4) and the core material (2) is 0.1 to 0.2 m11 or less.
後工程を高能率かつ高精度で行うことができる格別の効
果を奏す。This has the extraordinary effect of allowing post-processing to be carried out with high efficiency and precision.
つぎに、この実施例のコイルは、第７図に示すように、
４個の扇形薄板状のコイル片（７ａ）・・・と。Next, the coil of this example is as shown in FIG.
Four fan-shaped thin plate coil pieces (7a)...
これらコイル片（７ａ）・・・の扇頂部を配置中心に向
けて等配位置にて保持する円形の樹脂板（８ａ）とから
なっている。しかして、各コイル片（７ａ）は、銅パイ
プを切断して得られた芯材（２ａ）と、この芯材（２ａ
）のまわりにたとえば１００回程度捲回され両面にエポ
キシ樹脂などの絶縁性接着層が形成され且つ扇形に変形
加工された導電体（１ａ）と、この導電体（１ａ）の−
側部の外周部側にはんだ付けられた棒状の端子（４ａ）
とからなっている。一方、樹脂板（８ａ）は、たとえば
エポキシ樹脂などにより円形板状に形成されている。そ
うして、中央部に位置決め用の透孔（１３）が穿設され
ている。It consists of a circular resin plate (8a) that holds the fan tops of these coil pieces (7a) in equidistant positions toward the center of arrangement. Thus, each coil piece (7a) is made of a core material (2a) obtained by cutting a copper pipe, and a core material (2a) obtained by cutting a copper pipe.
), for example, about 100 times, an insulating adhesive layer such as epoxy resin is formed on both sides, and the conductor (1a) is deformed into a fan shape.
Rod-shaped terminal (4a) soldered to the outer peripheral side of the side part
It consists of On the other hand, the resin plate (8a) is formed into a circular plate shape using, for example, epoxy resin. Then, a through hole (13) for positioning is bored in the center.
しかして、上記構成のコイルは、樹脂板（８ａ）により
コイル片（７ａ）・・−を定位置に一体保持しているの
で、ステータ基板への組込みを確定に行うことができる
。また、端子（４ａ）・・・を有しているので。In the coil having the above structure, the coil pieces (7a) are integrally held in a fixed position by the resin plate (8a), so that the coil can be reliably assembled into the stator board. Also, since it has a terminal (4a)...
後工程における電気的接続を容易に行うことができる。Electrical connections in post-processes can be easily made.
なお、上記実施例の捲回工程においては、導体板（１）
に接着剤を塗布しながら捲回しているが、接着剤を塗布
することなく１例えば１５０回程度捲回し、しかるのち
、はんだ付けｌこより、端子（４）を接続してもよい。In addition, in the winding process of the above embodiment, the conductor plate (1)
Although the wire is wound while applying adhesive, it is also possible to wind the wire one time, for example, about 150 times without applying adhesive, and then connect the terminal (4) by soldering.
この場合も、上記実施例と同様の効果を奏する。また、
芯材（２）としては１円形パイプに限ることなく、中実
円形棒でもよい。In this case as well, the same effects as in the above embodiment can be achieved. Also,
The core material (2) is not limited to a single circular pipe, but may also be a solid circular rod.
この発明のコイルの製造方法は１円形芯材と端子とを基
準として１Ｍ形成形体にするための加圧工程、モールド
体を得るための注形工程及び基板に実装するための組立
工程を行っているので、コイルの製造を高精度かつ高能
率で行うことができる。しかも、コイルの設定位置精度
が向上する結果、磁気特性が高くなる。The method for manufacturing a coil of the present invention includes performing a pressurizing process to form a 1M formed body based on a circular core material and a terminal, a casting process to obtain a molded body, and an assembly process to mount it on a board. As a result, coils can be manufactured with high precision and efficiency. Furthermore, as a result of improving the positional accuracy of the coil, the magnetic properties are improved.
また１本発明のコイルは１組立性が良好で、電気的接続
を容易に行うことができるので、自動化に適合するもの
となっている。Furthermore, the coil of the present invention is easy to assemble and can be electrically connected easily, making it suitable for automation.
第１図は本発明の一実施例のコイルの製造方法の工程図
、第２図ないし第６図は第１区の各工程の説明図、第７
図は本発明の一実施例のコイルの斜視図である。
（１）：導体板、 （２） ：芯 材。
（３）二部状体、 （４） ：端 子。
（７）：成形体、 （８）：モールド体。
（９）：モールドスライスコイル、
（１ａ） ：導電体、 （２ａ） ：芯 材。
（４ａ）：端 子、 （７ａ） ：コイル片。
（Ｓａ） ：樹脂板。
代理人 弁理士 則 近 憲 佑
同 竹 花 喜久男
第６図 第５図
第７図FIG. 1 is a process diagram of a method for manufacturing a coil according to an embodiment of the present invention, FIGS. 2 to 6 are explanatory diagrams of each process in the first section, and FIG.
The figure is a perspective view of a coil according to an embodiment of the present invention. (1): Conductor plate, (2): Core material. (3) Two-part body, (4): Terminal. (7): Molded body, (8): Mold body. (9): Molded sliced coil, (1a): Conductor, (2a): Core material. (4a): Terminal, (7a): Coil piece. (Sa): Resin plate. Agent Patent Attorney Noriyuki Chika Yudo Kikuo Takehana Figure 6 Figure 5 Figure 7
Claims (2)
つこの芯材のまわりに捲回され且つほぼ扇形に形成され
た導電体及びこの導電体の外周部に連接された端子を有
す複数の板状コイル片と、これらコイル片を扇頂部位を
配置中心に向けて等配位置にて保持する円形の樹脂板と
を具備することを特徴とするコイル。(1) A plurality of conductors having a core material, an insulating coating formed on at least one side, a conductor wound around the core material, and formed in a substantially fan shape, and a terminal connected to the outer periphery of the conductor. A coil characterized in that it comprises plate-shaped coil pieces and a circular resin plate that holds these coil pieces at equidistant positions with the top of the fan facing toward the center of arrangement.
被膜を有する帯状導電体板を捲回し筒状体を形成する捲
回工程と、この捲回工程により得られた筒状体の外周面
に上記芯材と平行な棒状の端子を固着する端子接続工程
と、上記芯材及び上記端子を基準として上記筒状体を横
断面がほぼ扇形の成形体に加圧変形させる加圧工程と、
この加圧工程にて得られた複数の成形体を上記芯材及び
上記端子を基準として複数個等配させ樹脂により一体成
形してモールド体を得る樹脂成形工程とからなることを
特徴とするコイルの製造方法。(2) A winding step of forming a cylindrical body by winding a band-shaped conductor plate having an insulating coating on at least one side around a core material having a circular cross section, and the outer peripheral surface of the cylindrical body obtained by this winding process. a terminal connecting step of fixing a rod-shaped terminal parallel to the core material, and a pressurizing step of pressurizing and deforming the cylindrical body into a molded body having a substantially fan-shaped cross section with reference to the core material and the terminal;
A coil characterized in that it consists of a resin molding step in which a plurality of molded bodies obtained in this pressurizing step are equally distributed with reference to the core material and the terminal and integrally molded with resin to obtain a molded body. manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP999986A JPS62171437A (en) | 1986-01-22 | 1986-01-22 | Coil and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP999986A JPS62171437A (en) | 1986-01-22 | 1986-01-22 | Coil and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62171437A true JPS62171437A (en) | 1987-07-28 |
Family
ID=11735531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP999986A Pending JPS62171437A (en) | 1986-01-22 | 1986-01-22 | Coil and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62171437A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63220735A (en) * | 1987-03-09 | 1988-09-14 | Sony Chem Corp | Flat coil |
| JPH0654506A (en) * | 1992-07-31 | 1994-02-25 | Hitachi Ltd | Brushless dc motor and its manufacture |
| US20120248930A1 (en) * | 2011-03-30 | 2012-10-04 | Hitachi Metals, Ltd. | Wound core, electromagnetic component and manufacturing method therefor, and electromagnetic equipment |
| WO2018168058A1 (en) * | 2017-03-14 | 2018-09-20 | 株式会社日立製作所 | Axial gap dynamo-electric machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60144131A (en) * | 1983-12-29 | 1985-07-30 | Pioneer Electronic Corp | Manufacture of flat air core coil |
| JPS60241750A (en) * | 1984-05-14 | 1985-11-30 | Toshiba Corp | Manufacture of stator of brushless motor |
-
1986
- 1986-01-22 JP JP999986A patent/JPS62171437A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60144131A (en) * | 1983-12-29 | 1985-07-30 | Pioneer Electronic Corp | Manufacture of flat air core coil |
| JPS60241750A (en) * | 1984-05-14 | 1985-11-30 | Toshiba Corp | Manufacture of stator of brushless motor |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63220735A (en) * | 1987-03-09 | 1988-09-14 | Sony Chem Corp | Flat coil |
| JPH0654506A (en) * | 1992-07-31 | 1994-02-25 | Hitachi Ltd | Brushless dc motor and its manufacture |
| US20120248930A1 (en) * | 2011-03-30 | 2012-10-04 | Hitachi Metals, Ltd. | Wound core, electromagnetic component and manufacturing method therefor, and electromagnetic equipment |
| JP2012210106A (en) * | 2011-03-30 | 2012-10-25 | Hitachi Metals Ltd | Wound core, electromagnetic component and manufacturing method therefor and electromagnetic apparatus |
| US9553495B2 (en) | 2011-03-30 | 2017-01-24 | Hitachi Metals, Ltd. | Wound core, electromagnetic component and manufacturing method therefor, and electromagnetic equipment |
| WO2018168058A1 (en) * | 2017-03-14 | 2018-09-20 | 株式会社日立製作所 | Axial gap dynamo-electric machine |
| JPWO2018168058A1 (en) * | 2017-03-14 | 2019-08-08 | 株式会社日立製作所 | Axial gap type rotating electrical machine |
| US11205935B2 (en) | 2017-03-14 | 2021-12-21 | Hitachi, Ltd. | Axial gap dynamo-electric machine |
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