JPH0687637B2 - Field coil - Google Patents
Field coilInfo
- Publication number
- JPH0687637B2 JPH0687637B2 JP60019294A JP1929485A JPH0687637B2 JP H0687637 B2 JPH0687637 B2 JP H0687637B2 JP 60019294 A JP60019294 A JP 60019294A JP 1929485 A JP1929485 A JP 1929485A JP H0687637 B2 JPH0687637 B2 JP H0687637B2
- Authority
- JP
- Japan
- Prior art keywords
- field coil
- vinyl chloride
- chloride resin
- coil
- weight
- 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.)
- Expired - Lifetime
Links
- 229920005989 resin Polymers 0.000 claims description 36
- 239000011347 resin Substances 0.000 claims description 36
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims description 16
- 239000004020 conductor Substances 0.000 claims description 9
- 239000003431 cross linking reagent Substances 0.000 claims description 6
- 239000011810 insulating material Substances 0.000 claims description 4
- 238000003618 dip coating Methods 0.000 claims description 3
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 14
- 238000004132 cross linking Methods 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000007858 starting material Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 150000003918 triazines Chemical class 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/443—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from vinylhalogenides or other halogenoethylenic compounds
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/30—Windings characterised by the insulating material
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明はフィールドコイル、特に、始動電動機に装着
される直流直巻電動機の、耐熱性が改良されたフィール
ドコイルに関するものである。Description: FIELD OF THE INVENTION The present invention relates to a field coil, and more particularly to a field coil having improved heat resistance of a DC series-wound motor mounted on a starter motor.
［従来の技術］ 第２図は例えば実開昭57−82851号公報に示された従来
の始動電動機（スタータモータ）を一部断面図で示す正
面図、そして第３図は第２図の線II−II沿いの断面図で
ある。図において、（１）はアマチュアシャフト、
（２）はこのアマチュアシャフト（１）上に嵌着された
アマチュアコア、（３）はこのアマチュアコア（２）に
巻回されたアマチュアコイル、（４）はこのアマチュア
コイル（３）の一端と接続されると共にアマチュアシャ
フト（１）に嵌着された整流子（コンミテータ）、
（５）はアマチュアシャフト（１）を回転可能に支承す
るリヤブラケット、（６）はこのリヤブラケット（５）
と一体固着された筒状のヨーク（継鉄）、（７）はこの
ヨーク（６）の内周部に固着され、アマチュアコア
（２）と径方向に微少間隙を介して対向した界磁コア、
（８）はこの界磁コア（７）の外表面及びヨーク（６）
の内周面に塗着され、磁性材料が封入された第１の絶縁
樹脂で、パウダーコーティングによって形成される。
（９）は界磁コア（７）に第１の絶縁樹脂（８）を介し
て巻回され、表面を絶縁処理された導体よりなるフィー
ルドコイル（界磁コイル）、（10）はこのフィールドコ
イル（９）を絶縁固定する第２の絶縁樹脂で、ワニスか
らなり、フィールドコイル（９）間、第１の絶縁樹脂
（８）とフィールドコイル（９）との間隙及びフィール
ドコイル（９）の外周部に各々含浸される。[Prior Art] FIG. 2 is a front view showing a partial cross-sectional view of a conventional starter motor (starter motor) disclosed in, for example, Japanese Utility Model Publication No. 57-82851, and FIG. 3 is a line of FIG. It is a sectional view along II-II. In the figure, (1) is an amateur shaft,
(2) is an amateur core fitted onto the amateur shaft (1), (3) is an amateur coil wound around the amateur core (2), and (4) is one end of the amateur coil (3). A commutator that is connected and fitted to the amateur shaft (1),
(5) is a rear bracket that rotatably supports the amateur shaft (1), and (6) is this rear bracket (5).
A cylindrical yoke (yoke), (7) integrally fixed to the field core which is fixed to the inner peripheral portion of the yoke (6) and faces the amateur core (2) in the radial direction with a minute gap. ,
(8) is the outer surface of the field core (7) and the yoke (6)
It is a first insulating resin which is applied to the inner peripheral surface of and is filled with a magnetic material, and is formed by powder coating.
(9) is a field coil (field coil) which is wound around the field core (7) through the first insulating resin (8) and whose surface is insulated, and (10) is this field coil. A second insulating resin for insulating and fixing (9), which is made of a varnish, has a space between the field coils (9), a gap between the first insulating resin (8) and the field coil (9), and an outer periphery of the field coil (9). The parts are each impregnated.
上述した構成の始動電動機を製作する際には、まず、ヨ
ーク（６）の内周部に界磁コア（７）を固着する。この
後、界磁コア（７）におけるフィールドコイル（９）の
巻回部外周面及びヨーク（６）の内周面に磁性材料入り
の第１の絶縁樹脂（８）をパウダーコーティングによっ
て塗着する。次に界磁コア（７）に第１の絶縁樹脂
（８）を介してフィールドコイル（９）を巻回し、この
後、フィールドコイル（９）外周からワニスよりなる第
２の絶縁樹脂（10）を含浸してフィールドコイル（９）
を絶縁固定する。When manufacturing the starting motor having the above-described structure, first, the field core (7) is fixed to the inner peripheral portion of the yoke (6). Thereafter, the first insulating resin (8) containing a magnetic material is applied by powder coating to the outer peripheral surface of the winding portion of the field coil (9) and the inner peripheral surface of the yoke (6) in the field core (7). . Next, the field coil (9) is wound around the field core (7) through the first insulating resin (8), and then the second insulating resin (10) made of varnish is applied from the outer periphery of the field coil (9). Field coil impregnated with (9)
Insulate and fix.
すなわち、界磁コア（７）におけるフィールドコイル
（９）の巻回部及びヨーク（６）の内周面で第１の絶縁
樹脂（８）を塗着するようにしているので、フィールド
コイル（９）は完全に絶縁されると共に、第１の絶縁樹
脂（８）には磁性材料が封入されているので、界磁コア
（７）の磁気回路が充分に確保でき、始動電動機の出力
特性を改善でき得る。That is, since the first insulating resin (8) is applied to the winding portion of the field coil (9) in the field core (7) and the inner peripheral surface of the yoke (6), the field coil (9) ) Is completely insulated and the first insulating resin (8) is filled with a magnetic material, so that the magnetic circuit of the field core (7) can be sufficiently secured and the output characteristics of the starting motor are improved. You can do it.
［発明が解決しようとする問題点］ 従来のフィールドコイルは以上のように構成、製作され
ているので、絶縁樹脂の材質を選定して作業性及び耐熱
性、電気絶縁性を確保する必要があるが、耐熱性の高い
樹脂（プラスチックス）の場合は作業性が良くない等の
他、コストが上昇する等の問題点があった。また、導体
が円形断面の素線の束の場合、導体外周に凹凸が発生
し、絶縁樹脂の膜厚が不均一となるという問題点もあっ
た。[Problems to be Solved by the Invention] Since the conventional field coil is constructed and manufactured as described above, it is necessary to select the material of the insulating resin to ensure workability, heat resistance, and electrical insulation. However, in the case of a resin (plastics) having high heat resistance, there are problems such as poor workability and an increase in cost. Further, when the conductor is a bundle of strands having a circular cross section, there is a problem that unevenness is generated on the outer circumference of the conductor and the film thickness of the insulating resin becomes uneven.
この発明は上記のような問題点を解決するためになされ
たもので、絶縁樹脂の耐熱性が高く、作業性も従来と殆
ど変わらないフィールドコイルを得ることを目的とす
る。The present invention has been made to solve the above-mentioned problems, and an object thereof is to obtain a field coil in which the insulating resin has high heat resistance and workability is almost the same as that of the conventional field coil.
［問題点を解決するための手段］ この発明に係るフィールドコイルは、導体を平角導体と
し、巻装されたコイルの外層絶縁材を、主成分としての
塩化ビニール樹脂と、架橋剤としてのトリアジンと、架
橋促進剤とからなる架橋物で製造したものである。[Means for Solving the Problems] In the field coil according to the present invention, the conductor is a rectangular conductor, the outer layer insulating material of the wound coil is vinyl chloride resin as a main component, and triazine as a cross-linking agent. And a cross-linking accelerator.
［作用］ この発明によるフィールドコイルは、予め枠形に巻装さ
れた平角導体のコイルを、塩化ビニールを主成分とした
樹脂でディップコート（浸漬被覆）処理したものであ
る。[Operation] The field coil according to the present invention is obtained by dip-coating (immersion-coating) a rectangular conductor coil previously wound in a frame shape with a resin containing vinyl chloride as a main component.
塩化ビニール樹脂には、架橋剤としてのトリアジンを塩
化ビニール樹脂に対して１重量％以上好適には１〜３重
量％含有させ、さらに架橋促進剤（即ち反応促進剤であ
り例えば酸化カルシウム（CaO））を0.5重量％以上好適
には0.5〜２重量％含有させて混合融解して溶液とす
る。この溶液の中に加熱したフィールドコイルを浸漬し
たのち加熱硬化してディップコート処理する。The vinyl chloride resin contains triazine as a crosslinking agent in an amount of 1% by weight or more, preferably 1 to 3% by weight based on the vinyl chloride resin, and further contains a crosslinking accelerator (that is, a reaction accelerator such as calcium oxide (CaO)). 0.5% by weight or more, preferably 0.5 to 2% by weight, and mixed and melted to obtain a solution. A heated field coil is dipped in this solution and then heat-cured to be dip-coated.
ポリ塩化ビニール樹脂と架橋剤であるトリアジン（次の
式ではトリアジン誘導体を示す）とは次のように反応し
て架橋する： この発明によるフィールドコイルは、トリアジンによる
架橋構造によって耐熱性が向上する。Polyvinyl chloride resin and the cross-linking agent triazine (in the following formula represents a triazine derivative) react and cross-link as follows: The field coil according to the present invention has improved heat resistance due to the crosslinked structure of triazine.
［実施例］ 以下、この発明を実施例に基づき説明する。[Examples] Hereinafter, the present invention will be described based on Examples.
ポリ塩化ビニールに対し架橋剤であるトリアジンを１〜
３重量％混合し、この混合物に架橋促進剤を0.5〜２重
量％混合して融解する。上式に示すようにトリアジンで
架橋された塩化ビニール樹脂の架橋物が得られ、予め枠
形に巻回された平角導体より構成される枠形のコイルを
ディップコートする（溶液に浸漬する）。このコイルを
冷却乾燥すれば、コイル外周面に強固で厚肉、しかも膜
厚の均一な外層絶縁材が構成される。このコイルを第２
図又は第３図に示した従来装置の界磁コア（ポール）
（７）に巻装する。次にこの発明のフィールドコイルを
装着した始動電動機について、負荷装置により8V−200A
で30秒間ON−OFF試験を行なったところ、従来品に比べ
約1.5倍の持続時間及び耐熱性があることがわかった。1 to 3 of triazine, a cross-linking agent, for polyvinyl chloride
3% by weight are mixed, and 0.5-2% by weight of a crosslinking accelerator is mixed with this mixture and melted. As shown in the above formula, a crosslinked product of a vinyl chloride resin crosslinked with triazine is obtained, and a frame-shaped coil composed of a rectangular conductor wound in advance in a frame is dip-coated (immersed in a solution). When this coil is cooled and dried, a strong outer wall insulating material having a uniform thickness is formed on the outer peripheral surface of the coil. This coil is second
Field core (pole) of the conventional device shown in FIG. 3 or FIG.
Wind around (7). Next, regarding the starting motor equipped with the field coil of the present invention, 8V-200A
After conducting an ON-OFF test for 30 seconds, it was found that it had about 1.5 times the duration and heat resistance of the conventional product.
また、トリアジンを含有した塩化ビニール樹脂のゴム硬
度の温度に対する変化（ショアＡ硬度と同等）を測定
し、その結果を第１図に示す。図中、曲線Ａはトリアジ
ン２重量％を含有する場合、同Ｂは同じく1.4重量％を
含有する場合、同Ｃは同じく１重量％を含有する場合、
同Ｄは同じく0.7重量％を含有する場合、同Ｅはトリア
ジンを含有しない場合をそれぞれ示す。ただし、曲線Ｄ
は実施例ではなく、参考例として示したものである。こ
の図から、トリアジンを１〜３重量％含有した塩化ビニ
ール樹脂は、トリアジンを含有しないものに比べて耐熱
性が向上することがわかった。Further, a change in rubber hardness of the vinyl chloride resin containing triazine with respect to temperature (equivalent to Shore A hardness) was measured, and the result is shown in FIG. In the figure, the curve A contains 2% by weight of triazine, the same B contains 1.4% by weight, and the same C contains 1% by weight,
The same D shows the case where it contains 0.7% by weight, and the same E shows the case where it does not contain triazine. However, curve D
Is shown as a reference example, not an example. From this figure, it was found that the vinyl chloride resin containing 1 to 3% by weight of triazine has improved heat resistance as compared with the resin containing no triazine.
このように、この発明のフィールドコイルでは架橋反応
が速やかに進行し、従来の塩化ビニール樹脂単独あるい
は塩化ビニール樹脂にフィラー（例えばエポキシ等）を
含有した樹脂に比較し、耐熱性が向上し、しかも材料コ
ストが上昇せず、作業性も従来と変わらないものが得ら
れる効果を奏する。As described above, in the field coil of the present invention, the crosslinking reaction proceeds rapidly, and the heat resistance is improved as compared with the conventional vinyl chloride resin alone or the resin containing a filler (for example, epoxy) in the vinyl chloride resin, and The material cost is not increased and the workability is the same as the conventional one.
なお、上述の実施例では架橋材としてトリアジンを用い
た場合について説明したが、同様の機能を有するトリア
ジンの異性体、誘導体等であってもこの発明に使用でき
る。In addition, although the case where triazine is used as the cross-linking material has been described in the above-mentioned examples, isomers and derivatives of triazine having the same function can be used in the present invention.
［発明の効果］ この発明は以上説明したとおり、フィールドコイルの導
体を平角導体とし、フィールドコイルのディップコート
絶縁被覆すなわち巻装されたコイルの外層絶縁材を架橋
剤１重量％以上及び架橋促進剤0.5重量％以上を混合し
た塩化ビニール樹脂の架橋物で構成したので、装置の耐
熱性の優れたものが安価に且つ容易に製造できる効果が
ある。[Effects of the Invention] As described above, according to the present invention, the conductor of the field coil is a rectangular conductor, and the dip coat insulation coating of the field coil, that is, the outer layer insulating material of the wound coil is 1% by weight or more of the crosslinking agent and the crosslinking accelerator. Since it is composed of a cross-linked product of vinyl chloride resin mixed with 0.5% by weight or more, there is an effect that a device having excellent heat resistance can be easily manufactured at low cost.
特に、始動電動機として使用したときにアマチュアにエ
ポキシ樹脂を用いると耐熱レベルのバランスがとれて、
価格の上昇を抑えてスタータAssyの耐熱性向上が得られ
る。この場合に、耐熱性を向上させたこの発明の塩化ビ
ニール樹脂皮膜の軟化温度が上がるために、フィールド
コイル及びブラシピグテールの振動による断線等を防止
する効果を含み、静的な耐熱レベルだけでなく、スター
タのようにエンジンに装着された場合のような動的な耐
熱性も要求される場合に顕著な効果が認められる。In particular, when using it as a starting electric motor, using an epoxy resin for the amateur balances the heat resistance level,
It is possible to suppress the price increase and improve the heat resistance of the starter assembly. In this case, since the softening temperature of the vinyl chloride resin film of the present invention having improved heat resistance is increased, the effect of preventing disconnection due to vibration of the field coil and brush pigtail is included, and not only the static heat resistance level , A remarkable effect is recognized when dynamic heat resistance is required such as when the engine is mounted on a starter.
また、この発明に使用する樹脂はエポキシ樹脂のような
熱硬化性樹脂ではないため、ディップコート加熱後ゴム
弾性を有し、ヨークとポールにはさんで組付ける時に弾
性変形をするので作業性が非常によいというように、始
動電動機に採用したとき特に効果が大きい。即ち組付け
時にはゴム弾性があって組付作業性が良く、使用時に温
度が上がると架橋が進行し、その形態をくずすことが少
なく、硬度の低下が少ないのでコイルのくずれとか振動
による断線を防げる効果がある。Further, since the resin used in the present invention is not a thermosetting resin such as an epoxy resin, it has rubber elasticity after heating by dip coating and elastically deforms when assembled by sandwiching it between the yoke and the pole, so workability is improved. As it is very good, it is particularly effective when used in a starting motor. That is, it has rubber elasticity during assembly and good assembly workability, and when the temperature rises during use, cross-linking progresses, the shape is less likely to be broken, and the hardness is less reduced, so coil collapse and disconnection due to vibration can be prevented. effective.
なお、架橋促進剤例えばCaOを増量して行くと、架橋時
に発生するHClガスを CaO＋2HCl→CaCl2＋H2O として中和するので、金属の防錆効果を高めることがで
きる効果もある。When the amount of the crosslinking accelerator, such as CaO, is increased, the HCl gas generated at the time of crosslinking is neutralized as CaO + 2HCl → CaCl 2 + H 2 O, which also has the effect of enhancing the rust preventive effect of the metal.
第１図はこの発明の実施例におけるトリアジンを含有し
た塩化ビニール樹脂のゴム硬度の温度に対する変化を示
す線図、第２図は従来の始動電動機の一部断面正面図、
第３図は第２図の線II−IIに沿った断面図である。 図において、１はアマチュアシャフト、２はアマチュア
コア、３はアマチュアコイル、４は整流子、５はリヤブ
ラケツト、６はヨーク、７は界磁コア、８は第１の絶縁
樹脂、９はフィールドコイル、10は第２の絶縁樹脂であ
る。 なお、各図中、同一符号は同一または相当部分を示す。FIG. 1 is a diagram showing a change in rubber hardness of vinyl chloride resin containing triazine according to an embodiment of the present invention with respect to temperature, and FIG. 2 is a partial sectional front view of a conventional starting motor.
FIG. 3 is a sectional view taken along the line II-II in FIG. In the figure, 1 is an amateur shaft, 2 is an amateur core, 3 is an amateur coil, 4 is a commutator, 5 is a rear bracket, 6 is a yoke, 7 is a field core, 8 is a first insulating resin, and 9 is a field coil. , 10 are second insulating resins. In each drawing, the same reference numerals indicate the same or corresponding parts.
Claims (1)
コイルにおいて、平角導体で巻装されたコイルを、塩化
ビニール樹脂を主成分とし該塩化ビニール樹脂に対して
１重量％以上の架橋剤としてのトリアジンと上記塩化ビ
ニール樹脂に対して0.5重量％以上の架橋促進剤とから
なる架橋物でディップコート処理加工して外層絶縁材と
したことを特徴とするフィールドコイル。1. A field coil wound around a stator of a rotating electric machine, wherein the coil wound with a rectangular conductor is composed of vinyl chloride resin as a main component and 1% by weight or more of the crosslinking agent with respect to the vinyl chloride resin. And a cross-linked product of 0.5% by weight or more of the above-mentioned vinyl chloride resin with respect to the above-mentioned vinyl chloride resin, which is subjected to a dip coating treatment to form an outer layer insulating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60019294A JPH0687637B2 (en) | 1985-02-05 | 1985-02-05 | Field coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60019294A JPH0687637B2 (en) | 1985-02-05 | 1985-02-05 | Field coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61180541A JPS61180541A (en) | 1986-08-13 |
| JPH0687637B2 true JPH0687637B2 (en) | 1994-11-02 |
Family
ID=11995407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60019294A Expired - Lifetime JPH0687637B2 (en) | 1985-02-05 | 1985-02-05 | Field coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0687637B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7411012B2 (en) * | 2005-11-14 | 2008-08-12 | Isp Investments Inc. | Plasticized PVC compositions |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1034441A (en) | 1961-07-29 | 1966-06-29 | Pinchin Johnson & Ass Ltd | Improvements in or relating to coverings of coil windings of electrical apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52142754A (en) * | 1976-05-25 | 1977-11-28 | Norio Nakamura | Crossslinking agent for soft or paste polyvinyl chlorides |
-
1985
- 1985-02-05 JP JP60019294A patent/JPH0687637B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1034441A (en) | 1961-07-29 | 1966-06-29 | Pinchin Johnson & Ass Ltd | Improvements in or relating to coverings of coil windings of electrical apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61180541A (en) | 1986-08-13 |
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