JPH01198254A - Manufacture of field coil - Google Patents
Manufacture of field coilInfo
- Publication number
- JPH01198254A JPH01198254A JP2240488A JP2240488A JPH01198254A JP H01198254 A JPH01198254 A JP H01198254A JP 2240488 A JP2240488 A JP 2240488A JP 2240488 A JP2240488 A JP 2240488A JP H01198254 A JPH01198254 A JP H01198254A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- mica powder
- adhesive
- electrostatic
- molded
- 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 12
- 239000000843 powder Substances 0.000 claims abstract description 34
- 239000010445 mica Substances 0.000 claims abstract description 31
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 31
- 239000000853 adhesive Substances 0.000 claims abstract description 14
- 230000001070 adhesive effect Effects 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 11
- 238000004070 electrodeposition Methods 0.000 claims description 6
- 230000005686 electrostatic field Effects 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 abstract 1
- 239000011229 interlayer Substances 0.000 description 20
- 238000009413 insulation Methods 0.000 description 16
- 239000004020 conductor Substances 0.000 description 9
- 239000010410 layer Substances 0.000 description 9
- 238000004804 winding Methods 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 239000002966 varnish Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000004924 electrostatic deposition Methods 0.000 description 2
- 238000013007 heat curing Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241001251094 Formica Species 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Landscapes
- Manufacture Of Motors, Generators (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は界磁コイルの製造方法に係り、特にマイカ粉を
植付けた絶縁層を有する界磁コイルの製造方法に関する
。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a method for manufacturing a field coil, and particularly to a method for manufacturing a field coil having an insulating layer in which mica powder is implanted.
（従来の技術）
一般に、電動機等の界磁コイルには帯状の導体が採用さ
れている。この帯状の導体で界磁コイルを製造するには
まず導体を巻型に巻いて矩形状、小判状の成形コイルに
し、この成形コイルを巻型から外して接着剤を含浸させ
、各コイルの間に層間絶縁シートを挿入して層間絶縁を
施し、この層間絶縁された成形コイルを加熱硬化してか
ら絶縁テープを巻回し対地絶縁を施し、さらに、これら
成形コイルの全体を絶縁ワニスに浸漬またはレジンを真
空、過圧含浸した後、加熱硬化して製造していた。(Prior Art) Generally, a strip-shaped conductor is used in a field coil of an electric motor or the like. To manufacture a field coil using this strip-shaped conductor, first wind the conductor around a winding die to form a rectangular or oval shaped coil, then remove this formed coil from the winding die, impregnate it with adhesive, and add the space between each coil. interlayer insulation is applied by inserting an interlayer insulation sheet, the formed coil with this interlayer insulation is heated and cured, and then an insulating tape is wrapped to provide ground insulation, and then the entire formed coil is dipped in insulating varnish or resin. It was manufactured by vacuum and overpressure impregnation, followed by heat curing.
このような方法で製造された界磁コイルは、運搬時の振
動や、帯状の導体の成形時に生じる歪みが残留していて
原形に戻ろうとするスプリングバック等により層間絶縁
シートが挿入位置からずれ、導体と導体とが接してレア
・ショートを起こすことがあった。In field coils manufactured using this method, the interlayer insulating sheet may shift from its insertion position due to vibrations during transportation or residual distortion caused during the forming of the strip-shaped conductor, resulting in springback when the conductor tries to return to its original shape. Conductors sometimes came into contact with each other, causing a rare short circuit.
そのため界磁コイルの各コイル１０の間に挿入される層
間絶縁シート１１を第４図に示すようにコイル１０の幅
より広くし、層間絶縁シート１１が挿入位置からずれて
も各導体がレア・ショートをしないようにしていた。Therefore, the interlayer insulating sheet 11 inserted between each coil 10 of the field coil is made wider than the width of the coil 10, as shown in FIG. I was trying not to short it.
（発明が解決しようとする課８）
層間絶縁シート１１をコイル１０の幅より広くした場合
、その張出部分１２は絶縁テープを巻回する前に切断刃
１３により切断する必要があるが、この場合、この層間
絶縁シート１１は加熱硬化処理時に加えられる熱即ちホ
ットモールド時の熱のため硬化し、脆くなっているため
′、切断刃１３により切断するとき第５図に示すように
コイル１０の間の内部１４までえぐられて、切欠部を生
じることがあり、これがレア・ショートの原因となる等
の問題がある。(Issue 8 to be solved by the invention) When the interlayer insulating sheet 11 is made wider than the width of the coil 10, the overhanging portion 12 needs to be cut with the cutting blade 13 before winding the insulating tape. In this case, the interlayer insulating sheet 11 is hardened and brittle due to the heat applied during the heat curing process, that is, the heat during hot molding. The inside 14 between the two may be hollowed out, creating a notch, which may cause problems such as a rare short circuit.
本発明は、上記問題を解決すべくレア・ショートのない
層間絶縁を有する界磁コイルの製造方法を提供すること
を目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing a field coil having interlayer insulation free from layer shorts in order to solve the above problems.
〔発明の構成〕
（課題を解決するための手段）
本発明は、上記問題を解決すべく予め接着剤を塗布した
成形コイルにマイカ粉を植付け、このマイカ粉を植付け
た成形コイルを接着剤に含浸してから積層し、加熱硬化
するようにしたことを特徴とする界磁コイルの製造方法
を得るにある。[Structure of the Invention] (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention injects mica powder into a molded coil coated with an adhesive in advance, and then coats the molded coil with the mica powder inoculated with an adhesive. To provide a method for producing a field coil, characterized in that the coils are impregnated, laminated, and cured by heating.
（作 用）
マイカ粉を植付けた成形コイルに接着剤を含浸させてか
ら積層し、その後加熱硬化させるので、このマイカ粉か
らなる層が層間絶縁層を形成し、十分層間絶縁を行うこ
とができる。しかも上記マイカ粉は、予め接着剤が塗布
された成形コイルに植付けられるので、複雑な形状に成
形された成形コイルに対してもその表面に容易にかつ均
一に層着でき、絶縁性能を向上させることができる。(Function) Molded coils inoculated with mica powder are impregnated with adhesive and then laminated, and then heated and cured, so this layer of mica powder forms an interlayer insulation layer, and sufficient interlayer insulation can be achieved. . Moreover, since the mica powder is planted on the molded coil that has been coated with adhesive in advance, it can be easily and evenly layered on the surface of the molded coil formed into a complex shape, improving insulation performance. be able to.
（実施例） 以下図面について本発明の一実施例を説明する。(Example) An embodiment of the present invention will be described below with reference to the drawings.
第１図は、車両用直流電動機の界磁コイル２０の断面を
示す図であって、この界磁コイル２０は、図示しないが
適宜の巻型により帯状の導体を矩形状または小判形状に
巻回することにより形成された成形コイル２１の外側に
、マイカ粉を植付けた層間絶縁層２３を施し、この層間
絶縁層２３の外側に絶縁テープと絶縁ワニス等による対
地絶縁層２４が施されている。FIG. 1 is a diagram showing a cross section of a field coil 20 of a DC motor for a vehicle, and this field coil 20 is made by winding a strip-shaped conductor into a rectangular or oval shape using an appropriate winding form (not shown). An interlayer insulating layer 23 in which mica powder is planted is applied to the outside of the formed coil 21 formed by this process, and a ground insulating layer 24 made of insulating tape, insulating varnish, etc. is applied to the outside of this interlayer insulating layer 23.
成形コイル２１にマイカ粉を植付けるには第２図に示す
静電電着装置２５により行なわれる。この静電電着装置
２５は、成形コイル２１に直流高電圧を印加しながら支
持する釣具２６がその中央部に設けられ、その外周に直
流高電圧を印加する電極２７、マイカ粉２８を供給する
収納容器２９が設けられている。The molding coil 21 is inoculated with mica powder using an electrostatic deposition device 25 shown in FIG. This electrostatic electrodeposition device 25 has a fishing gear 26 at its center that supports a molded coil 21 while applying a high DC voltage, an electrode 27 that applies a high DC voltage to the outer periphery, and a housing that supplies mica powder 28. A container 29 is provided.
釣具２６は、詳細には図示しないが支持具３０に取外し
自在に設けられた中央棒３１と成形コイル２１を支持す
る逆Ｖ字の腕部３２とからなり、直流電源３３から負の
直流高電圧が支持具３０、中央棒３１および腕部３２を
介して成形コイル２１に印加されるようにしである。Although not shown in detail, the fishing gear 26 consists of a central rod 31 removably provided on a support 30 and an inverted V-shaped arm 32 that supports the molded coil 21, and receives a negative DC high voltage from a DC power source 33. is applied to the forming coil 21 via the support 30, the central rod 31 and the arm portion 32.
また電極２７は、成形コイル２１に対向するように適宜
な支持壁３４の内部で環状に形成されており、前記直流
電源３３から正の直流高電圧が印加されるようになって
いる。Further, the electrode 27 is formed in an annular shape inside a suitable support wall 34 so as to face the forming coil 21, and a positive DC high voltage is applied from the DC power source 33.
この電極２７の上部であって前記支持壁３４には加振板
３５を有するマイカ粉２８の収納容器２９が設けられて
おり、この収納容器２９の下部には前記電極２７に面す
る部位に開口部３６が設けられ、加振板３５の振動によ
りマイカ粉２８を順次両電極即ち成形コイル２１と電極
２７との空間部３７に供給されるようになっている。A storage container 29 for mica powder 28 having a vibrating plate 35 is provided on the support wall 34 above the electrode 27, and an opening is provided in the lower part of the storage container 29 at a portion facing the electrode 27. A section 36 is provided, and the mica powder 28 is sequentially supplied to the space 37 between both electrodes, that is, the molded coil 21 and the electrode 27 by the vibration of the vibration plate 35.
なお上記マイカ粉２８としては３２５メツシユの櫛を通
過した微粒鱗片状のものを用いるとよい。As the mica powder 28, it is preferable to use a powder in the form of fine scales that has passed through a 325-mesh comb.
次にこの界磁コイル２０製造方法を説明する。Next, a method of manufacturing this field coil 20 will be explained.
先ず帯状の導体を図示しない巻型により矩形状または小
判形状に巻回して成形コイル２１を形成し、この成彩コ
イル２１に接着剤例えばＴＶＯ２４ワニス（東芝ケミカ
ル製）を塗布し、数１０μｍｍの厚さの塗膜２２ａを形
成する（第３図参照）。First, a band-shaped conductor is wound into a rectangular or oval shape using a winding die (not shown) to form a formed coil 21. An adhesive such as TVO24 varnish (manufactured by Toshiba Chemical) is applied to this colored coil 21, and a thickness of several tens of μmm is formed. A thin coating film 22a is formed (see FIG. 3).
このように形成したした成形コイル２１を第２図に示す
静電電着装置２５の釣具２６に吊るし、成形コイル２１
を電極２７の間に対向させる。そこで直流電源３３を入
れ、電極２７に正、成形コイル２１に負の直流高電圧を
印加する。また加振板３５を作動させて、振動させ、マ
イカ粉２８を開口部３６を介して成形コイル２１と電極
２７との静電界の空間部３７に供給する。すると、この
供給過程においてマイカ粉２８が成形コイル２１と電極
２７とに印加される直流高電圧により帯電され、成形コ
イル２１に向かって飛翔しながら吸引される。成形コイ
ル２１の塗膜２２ａの表面に到達したマイカ粉２８は、
そこで自由電荷を放出するが、誘導分極による電荷の静
電的な結合力の方がマイカ粉２８に働く力よりはるかに
大きいため、塗膜２２ａには１００％電界による力を受
けたマイカ粉２８が電着で植付けられる。The molded coil 21 thus formed is hung from the fishing gear 26 of the electrostatic electrodeposition device 25 shown in FIG.
are opposed between the electrodes 27. Then, the DC power supply 33 is turned on, and a positive DC high voltage is applied to the electrode 27 and a negative DC high voltage is applied to the forming coil 21. Further, the vibrating plate 35 is operated to vibrate, and the mica powder 28 is supplied to the space 37 of the electrostatic field between the forming coil 21 and the electrode 27 through the opening 36 . Then, during this supply process, the mica powder 28 is charged by the DC high voltage applied to the forming coil 21 and the electrode 27, and is attracted while flying toward the forming coil 21. The mica powder 28 that has reached the surface of the coating film 22a of the molded coil 21 is
There, free charges are released, but since the electrostatic bonding force of the charges due to induced polarization is much larger than the force acting on the mica powder 28, the coating film 22a is exposed to the mica powder 28 which has received 100% of the force due to the electric field. is planted by electrodeposition.
このようにマイカ粉２８を植付けた成形コイル２１を釣
具２６から外し図示しない電気炉で加熱し、マイカ粉２
８を成形コイル２１に固着する。The molded coil 21 inoculated with mica powder 28 in this way is removed from the fishing gear 26 and heated in an electric furnace (not shown).
8 is fixed to the molded coil 21.
次にこの成形コイル２１に接着材２２ｂを塗布した後（
第３図参照）、成形コイル２１を順次重合せ、ホットモ
ールドして層間接着し、各成形コイル２１を固めてから
絶縁テープ等により対地絶縁２４を施し、界磁コイル２
０を製造する。Next, after applying adhesive 22b to this molded coil 21 (
(see Figure 3), the molded coils 21 are successively superimposed, hot-molded and bonded between layers, each molded coil 21 is hardened, and ground insulation 24 is applied using insulating tape or the like.
Manufacture 0.
なお層間接着する接着材としては例えば前記ＴＶＯ２４
フェス（東芝ケミカル製）を用い、その厚さは５０〜６
０μｍ１１程度にするとよい。In addition, as an adhesive material for interlayer bonding, for example, the above-mentioned TVO24
Use fest (manufactured by Toshiba Chemical), its thickness is 50-6
It is preferable to set it to about 0 μm11.
このようにして得られた界磁コイル２０の層間絶縁の厚
さは０．２ｍｍ、絶縁破壊電圧は１．６〜２．２ｋｖで
あり、通常使用される電圧の数１０倍の絶縁耐力のもの
が得られる。The thickness of the interlayer insulation of the field coil 20 obtained in this way is 0.2 mm, the dielectric breakdown voltage is 1.6 to 2.2 kV, and the dielectric strength is several tens of times higher than the normally used voltage. is obtained.
本発明においては、上述のように成形コイルに接石材を
塗布してからマイカ粉を植付け、加熱して層間絶縁を施
すようにしたから、従来のように成形コイルの間に層間
絶縁シートを挿入する必要がなく、この層間絶縁シート
の位置ずれによる不具合等でコイルのルア・ショートを
生じる恐れがなく、絶縁耐力が大きな界磁コイルとする
ことができる。In the present invention, as described above, the molded coil is coated with a stone material and then mica powder is planted and heated to provide interlayer insulation, so an interlayer insulation sheet is inserted between the molded coils as in the conventional method. There is no need to do so, and there is no risk of luer short circuiting of the coil due to malfunctions due to misalignment of the interlayer insulating sheet, and a field coil with high dielectric strength can be obtained.
マイカ粉を植付けるのに静電電着法を用いることによっ
て、マイカ粉の植付を容易にかつ複雑な形状のものにも
均一に適確に行うことができる。By using the electrostatic deposition method for planting mica powder, it is possible to easily and evenly and accurately plant mica powder even on objects with complicated shapes.
また加振板の作動によりマイカ粉を静電界中に送出すよ
うにすることにより、マイカ粉が飛翔されて成形コイル
に吸引され、マイカ粉が成形コイルに均一に植付けられ
、層間絶縁層の厚さを均一にできる。In addition, by sending the mica powder into the electrostatic field by operating the vibrating plate, the mica powder is blown out and attracted to the forming coil, and the mica powder is uniformly planted on the forming coil, increasing the thickness of the interlayer insulation layer. It can make the thickness uniform.
第１図は、本発明に係る界磁コイルの切断面図、第２図
は、静電電着装置の主要部を示す概略構成図、第３図は
、第１図の界磁コイルの一つの導体の主要部を示す切断
面図、第４図および第５図は従来の界磁コイルの製造方
法を示す説明図である。
１０・・・界磁コイル、１１・・・層間絶縁シート、１
２・・・張出部分、１３・・・切断刃、１４・・・内部
、２０・・・界磁コイル、２１・・・成形コイル、２３
・・・層間絶縁、２４・・・対地絶縁、２５・・・静電
電着装置、２６・・・釣具、２７・・・電極、２８・・
・マイカ粉、２９・・・収納容器、３０・・・支持具、
３３・・・直流電源、３４・・・支持壁、３５・・・加
振板、３６・・・開口部、３７・・・空間部。
出願人代理人 佐 藤 −雄
馬１図
為２図
嶌３図
罠５図FIG. 1 is a cross-sectional view of a field coil according to the present invention, FIG. 2 is a schematic configuration diagram showing the main parts of an electrostatic electrodeposition device, and FIG. 3 is a cross-sectional view of one of the field coils in FIG. A cross-sectional view showing the main part of the conductor, and FIGS. 4 and 5 are explanatory diagrams showing a conventional method of manufacturing a field coil. 10... Field coil, 11... Interlayer insulation sheet, 1
2... Overhanging portion, 13... Cutting blade, 14... Inside, 20... Field coil, 21... Molding coil, 23
... Interlayer insulation, 24... Ground insulation, 25... Electrostatic electrodeposition device, 26... Fishing gear, 27... Electrode, 28...
・Mica powder, 29...Storage container, 30...Support,
33... DC power supply, 34... Support wall, 35... Vibration plate, 36... Opening, 37... Space. Applicant's agent Sato - Stallion 1 figure 2 figures island 3 figures trap 5 figures
Claims (1)
け、このマイカ粉を植付けた成形コイルに接着剤を含浸
してから積層し、加熱硬化するようにしたことを特徴と
する界磁コイルの製造方法。 ２、マイカ粉を静電吸引力による電着法で成形コイルに
植付けるようにしたことを特徴とする請求項１記載の界
磁コイルの製造方法。 ３、マイカ粉は加振動により静電界に順次供給されるよ
うにしたことを特徴とする請求項２記載の界磁コイルの
製造方法。[Claims] 1. Mica powder is planted in a molded coil coated with adhesive in advance, and the molded coil seeded with mica powder is impregnated with adhesive, then laminated and cured by heating. A method for manufacturing a field coil. 2. The method for manufacturing a field coil according to claim 1, wherein the mica powder is implanted into the molded coil by electrodeposition using electrostatic attraction. 3. The method for manufacturing a field coil according to claim 2, wherein the mica powder is sequentially supplied to the electrostatic field by vibration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2240488A JPH01198254A (en) | 1988-02-02 | 1988-02-02 | Manufacture of field coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2240488A JPH01198254A (en) | 1988-02-02 | 1988-02-02 | Manufacture of field coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01198254A true JPH01198254A (en) | 1989-08-09 |
Family
ID=12081726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2240488A Pending JPH01198254A (en) | 1988-02-02 | 1988-02-02 | Manufacture of field coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01198254A (en) |
-
1988
- 1988-02-02 JP JP2240488A patent/JPH01198254A/en active Pending
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