JPH03246384A - Electric rotating machine - Google Patents
Electric rotating machineInfo
- Publication number
- JPH03246384A JPH03246384A JP4127590A JP4127590A JPH03246384A JP H03246384 A JPH03246384 A JP H03246384A JP 4127590 A JP4127590 A JP 4127590A JP 4127590 A JP4127590 A JP 4127590A JP H03246384 A JPH03246384 A JP H03246384A
- Authority
- JP
- Japan
- Prior art keywords
- polyimide
- insulation
- aromatic polyamide
- coil
- iron 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
- 238000009413 insulation Methods 0.000 claims abstract description 24
- 229920001721 polyimide Polymers 0.000 claims abstract description 21
- 239000004642 Polyimide Substances 0.000 claims abstract description 15
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 239000011347 resin Substances 0.000 claims abstract description 12
- 239000004760 aramid Substances 0.000 claims abstract description 6
- 229920003235 aromatic polyamide Polymers 0.000 claims abstract description 6
- OHMHBGPWCHTMQE-UHFFFAOYSA-N 2,2-dichloro-1,1,1-trifluoroethane Chemical compound FC(F)(F)C(Cl)Cl OHMHBGPWCHTMQE-UHFFFAOYSA-N 0.000 claims description 18
- 239000003507 refrigerant Substances 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 5
- 238000000605 extraction Methods 0.000 abstract description 3
- XQUPVDVFXZDTLT-UHFFFAOYSA-N 1-[4-[[4-(2,5-dioxopyrrol-1-yl)phenyl]methyl]phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C(C=C1)=CC=C1CC1=CC=C(N2C(C=CC2=O)=O)C=C1 XQUPVDVFXZDTLT-UHFFFAOYSA-N 0.000 abstract description 2
- 229920003192 poly(bis maleimide) Polymers 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 2
- 239000002826 coolant Substances 0.000 abstract 1
- 238000005336 cracking Methods 0.000 abstract 1
- 238000004804 winding Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 5
- 239000011810 insulating material Substances 0.000 description 5
- 229920000728 polyester Polymers 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000002966 varnish Substances 0.000 description 4
- IDCBOTIENDVCBQ-UHFFFAOYSA-N TEPP Chemical compound CCOP(=O)(OCC)OP(=O)(OCC)OCC IDCBOTIENDVCBQ-UHFFFAOYSA-N 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 3
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- -1 polytetrafluoroethylene Polymers 0.000 description 3
- VOPWNXZWBYDODV-UHFFFAOYSA-N Chlorodifluoromethane Chemical compound FC(F)Cl VOPWNXZWBYDODV-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- NBVXSUQYWXRMNV-UHFFFAOYSA-N monofluoromethane Natural products FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000004338 Dichlorodifluoromethane Substances 0.000 description 1
- 229920000784 Nomex Polymers 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 229920001646 UPILEX Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940042935 dichlorodifluoromethane Drugs 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012632 extractable Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004763 nomex Substances 0.000 description 1
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229940035339 tri-chlor Drugs 0.000 description 1
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compressor (AREA)
- Insulation, Fastening Of Motor, Generator Windings (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２，２−ジクロロ−１，１，１−トリフルオロ
エタンＣＨＣｆ；ｔ、ＣＦ３（以下フロン１２３と記述
する）を冷媒に使用する回転電機に係り、特にその絶縁
構成に関する。Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) The present invention relates to 2,2-dichloro-1,1,1-trifluoroethane CHCf;t,CF3 (hereinafter referred to as Freon 123). The present invention relates to a rotating electric machine that uses a refrigerant, and particularly to its insulation structure.
（従来の技術）
従来、コンプレッサ等用の冷媒にはジクロル・ジフルオ
ルメタンＣＣρ２Ｆ２（フロン１２）、トリクロル・モ
ノフルオルメタンＣＣ０３Ｆ （フロン１１）、モノク
ロル・ジフルオルメタンＣＨＣＱＦ、 （フロン２２）
、等のフロンが使用されてきた。(Prior art) Conventionally, refrigerants for compressors, etc. include dichloro difluoromethane CCρ2F2 (Freon 12), trichlor monofluoromethane CC03F (Freon 11), monochloro difluoromethane CHCQF, (Freon 22).
, etc. have been used.
（発明が解決しようとする課題）
しかし、これらのフロンはオゾン破壊力が高く、温室効
果係数も大きいため、地球の環境を保護する上で問題と
なってきた。(Problems to be Solved by the Invention) However, these CFCs have a high ozone-depleting power and a large greenhouse effect coefficient, so they have become a problem in protecting the earth's environment.
またこれら以外のフロンは、活性が強く、絶縁材料、ひ
いては金属材料を損傷させる恐れがあった。Furthermore, other fluorocarbons are highly active and may damage insulating materials and even metal materials.
本発明は上記のような従来技術の欠点に鑑みなされたも
のであり、オゾン破壊力が低く、温室効果係数も小さい
フロン１２３を冷媒に使用する回転電機において、巻線
を損傷させることのない安定した絶縁構成を有する回転
電機を提供することを目的とする。The present invention has been made in view of the above-mentioned shortcomings of the prior art, and it is a rotating electric machine that uses Freon 123 as a refrigerant, which has a low ozone depletion power and a small greenhouse effect coefficient, and provides a stable system that does not damage the windings. An object of the present invention is to provide a rotating electric machine having an insulation configuration.
（課題を解決するための手段）
上記目的を達成するため本発明においては、フロン１２
３を冷媒に用いた回転電機において、電線をポリイミド
被覆絶縁電線、スロット絶縁をポリイミドフィルムまた
は芳香族ポリアミド紙、含浸樹脂をポリイミドを含有し
た樹脂を使って絶縁を構成する。(Means for solving the problem) In order to achieve the above object, in the present invention, Freon 12
In a rotating electric machine using No. 3 as a refrigerant, the insulation is constructed using a polyimide-coated insulated wire as the wire, a polyimide film or aromatic polyamide paper as the slot insulation, and a resin containing polyimide as the impregnated resin.
（作 用）
上述した構成の絶縁は、使用した材料がフロン１２３に
対して強く、フロン１２３浸漬下で運転された際に、物
質が抽出されたり、クラックが入ったりして回転電機に
有害な作用を引き起こすことがない。(Function) The insulation with the above-mentioned structure is made of materials that are resistant to Freon 123, and when operated under conditions immersed in Freon 123, substances may be extracted or cracks may occur, which can be harmful to rotating electric machines. Does not cause any effects.
（実施例） 本発明の一実施例を第１図を用いて説明する。(Example) An embodiment of the present invention will be described with reference to FIG.
鉄心■にポリイミドフィルム（例えば、カプトン：デュ
ポン社商品名、ユーピレックス：宇部興産社商品名）ま
たは芳香族ポリアミド紙（例えば、ノーメックス：デュ
ポン社商品名）をスロット絶縁■、中敷絶縁■および楔
（イ）として使い、ポリイミド被覆絶縁電線（例えば、
ＭＬ電線：デュポン社商品名、サーモタイトＣ７電線：
昭和電線電ｅ社商品名）■を巻回する。ただし、楔（イ
）にはポリイミド積層板等を用いてもよい。巻線の端部
にはガラステープを巻回する。また１回出し線にはポリ
テトラフルオロエチレン（以下ＰＴＦＥと略す。Polyimide film (e.g., Kapton: trade name of DuPont, Upilex: trade name of Ube Industries, Ltd.) or aromatic polyamide paper (e.g., Nomex: trade name of DuPont) is applied to the iron core. A), polyimide coated insulated wire (e.g.
ML wire: DuPont product name, Thermotite C7 wire:
Wind the Showa Cable and Wire Company e company's product name) ■. However, a polyimide laminate or the like may be used for the wedge (a). Wrap a glass tape around the end of the winding. Moreover, the one-shot wire is made of polytetrafluoroethylene (hereinafter abbreviated as PTFE).
例えばテフロン：デュポン社商品名）被覆絶縁電線を使
用するか、ガラステープを巻回する。そしてポリイミド
成分として、ビスマレイミドを含有した樹脂（例えばイ
ミダロイ■：東芝ケミカル社商品名）を含浸し、１５０
℃で３時間更に１８０℃で１６時間加熱硬化した。呂来
上がった巻線を固定子巻線とし、フロン１２３に浸漬し
た状態で冷媒であるフロン１２３を循環させるための電
動機を製作した。For example, use Teflon (trade name of DuPont) coated insulated wire or wrap it with glass tape. Then, as a polyimide component, a resin containing bismaleimide (for example, Imidalloy ■: Toshiba Chemical Co., Ltd. trade name) is impregnated with 150%
It was heat-cured at 180°C for 3 hours and then at 180°C for 16 hours. An electric motor for circulating the refrigerant, fluorocarbon 123, was manufactured by using the resulting winding as a stator winding and immersed in fluorocarbon 123.
なお、実施例の効果を確認するために、下記の比較試料
を用意した。In addition, in order to confirm the effects of the examples, the following comparative samples were prepared.
比較例１
スロット絶ａ■、中敷絶縁（３）、楔（イ）としてポリ
エチレンテレフタレートフィルム（例えばルミラー二東
し社商品名）、絶縁電線としてホルマール被覆絶縁電線
を使い１巻線の端部にはポリエステル（例えばテトロン
：ティジン社商品名）クロステープを巻回し、口出し線
にはポリエステル絶縁テトロン編組線を用いた。含浸樹
脂にはフェノール変成エポキシワニス（例えばＰＤＤ＃
９２３：ボデグリー社商品名）を用い、１５０℃で１５
時間加熱して、上述した実施例同様のフロン１２３を循
環させるための電動機を製作した。Comparative Example 1 Slot insulation a■, insole insulation (3), polyethylene terephthalate film (for example, Lumirror Nitoshi Co., Ltd. product name) as the wedge (a), formal coated insulated wire as the insulated wire, and the end of one winding. A polyester (eg, Tetron: trade name of Tijin Co., Ltd.) cross tape was wound around the wire, and a polyester insulated Tetron braided wire was used as the lead wire. The impregnating resin is a phenol-modified epoxy varnish (for example, PDD#
923: Product name of Bodegree Co., Ltd.) at 150°C.
An electric motor for circulating the Freon 123 similar to the embodiment described above was manufactured by heating for a period of time.
比較例２
スロット絶縁■、中敷絶縁■、楔に）としてポリエチレ
ンテレフタレートフィルム（例えばルミラー：東し社商
品名）、絶縁電線としてポリアミドイミド被覆絶縁電線
を使い、巻線の端部にはポリエステル（例えばテトロン
：ティジン社商品名）クロステープを巻回し、口出し線
には熱収縮性テフロンチューブ被覆線を用いた。含浸樹
脂にはフェノール変成エポキシワニス（例えばＰＤＧ＃
９２３：ペデグリー社商品名）を用い、１５０℃で１５
時間加熱硬化して、上述した実施例同様のフロン１２３
を循環させるための電動機を製作した。Comparative Example 2 Polyethylene terephthalate film (e.g. Lumirror: Toshisha product name) was used as the slot insulation ■, insole insulation ■, wedge), polyamide-imide coated insulated wire was used as the insulated wire, and polyester ( For example, Tetron (trade name, Tijin Co., Ltd.) was wound with cross tape, and a heat-shrinkable Teflon tube-covered wire was used as the lead wire. The impregnating resin is a phenol-modified epoxy varnish (for example, PDG#
923: Pedigree Co., Ltd. product name) at 150°C for 15
Freon 123 similar to the above-mentioned example is cured by heating for a period of time.
An electric motor was created to circulate the water.
次に実施例の作用について述べる。Next, the operation of the embodiment will be described.
ポリイミド被覆絶縁電線（ハ）を鉄心■に巻回するのは
、回転子を回転させるための磁場を形成するためで、ス
ロット絶縁■および中敷絶縁（３）は電界の高いスロッ
ト部および異相間の絶縁を補強するために用いる。また
巻線の端部にはガラステープを巻回するのは、ポリイミ
ド被覆絶縁電線■を保護すると同時に、ポリイミドを含
有する樹脂の保持を良くし、巻線の支持固定の効果を高
めるためである。The purpose of winding the polyimide coated insulated wire (c) around the iron core ■ is to form a magnetic field to rotate the rotor. Used to reinforce the insulation of In addition, glass tape is wrapped around the ends of the windings in order to protect the polyimide-coated insulated wire■, as well as to better retain the polyimide-containing resin and enhance the effect of supporting and fixing the windings. .
以上の実施例および比較例で使用した各種の絶縁材料に
ついて、オートクレーブに封入したフロン１２３中で、
１３０℃で５日間加熱した後、オートクレーブから取り
呂して、１８０℃で１０分間加熱して、絶縁被覆電線に
ついてはＪＩＳ Ｃ３００３に準じ電線を２個撚りした
もの（ツイストペア）を試料として用い絶縁破壊電圧の
変化を調べ、その他については重量変化から抽出率を求
めた。その結果を第１表および第２表に示す。Regarding the various insulating materials used in the above examples and comparative examples, in Freon 123 sealed in an autoclave,
After heating at 130°C for 5 days, remove from the autoclave and heat at 180°C for 10 minutes to measure dielectric breakdown using a twisted pair of two wires (twisted pair) according to JIS C3003 for insulated wires. Changes in voltage were examined, and for other matters, extraction rates were determined from changes in weight. The results are shown in Tables 1 and 2.
以下余白
第１表
絶縁被覆電線のフロン１２３浸漬による絶縁破壊電圧の
変化
以下余白
第２表
各種絶縁材料のフロン１２３浸漬に
よる抽出率
第１表および第２表に示したように、本実施例で使用し
た絶縁材料は比較例で使用した絶縁材料に比べ、絶縁破
壊電圧の低下や、抽出物も少ない。Table 1 (margin): Change in breakdown voltage of insulated wires immersed in fluorocarbon 123 (Table 2): Extraction rate of various insulating materials by immersion in fluorocarbon 123 As shown in Tables 1 and 2, in this example, The insulating material used has a lower dielectric breakdown voltage and less extractables than the insulating material used in the comparative example.
従って、本構成の絶縁は比較例の絶縁に比べてフロン１
２３に対して強く、フロン１２３浸漬下で運転された際
に、物質が抽出されたり、クラックが入ったりして回転
電機に有害な作用を引き起こすことがない。Therefore, the insulation of this configuration has 1 more Freon than the insulation of the comparative example.
23, and when operating under Freon 123 immersion, substances will not be extracted or cracks will occur, causing harmful effects to the rotating electric machine.
本実施例の効果を確認するために、本実施例および比較
例の絶縁を施したモータレットを各３台用意し、東芝ケ
ミカル社製冷凍機機能評価試験装置を用いて、フロン１
２３ガス雰囲気中で通電加熱・電圧印加後、室温のフロ
ン１２３液中で冷却するサイクルを下記条件、即ち
通電電圧：線間Ａｃ１１０Ｖ 対地間ＡＣ４４０Ｖ通
電サイクル：３６サイクル７日 夜間寝込１サイクル
５分通電 ５分冷却
試験条件二通電開始温度１８０℃、２４０℃まで２０℃
／日昇温それ以降は１０℃／日昇温で加熱温度を段階的
に上げながら短絡する温度と時間を求めた結果を第２図
に示す。本実施例は第２図に示した最も高い温度まで耐
えられ、回転電機の巻線電機の巻線絶縁として安定して
使用できることが分かる。試験後の試料のｍｓ結果では
、本実施例を除いてはいずれも鉄心が腐食していた。In order to confirm the effect of this example, we prepared three motorets each with insulation according to this example and comparative example, and tested them using a refrigerator function evaluation test device manufactured by Toshiba Chemical Corporation.
After heating and voltage application in a 23 gas atmosphere, the cycle of cooling in a Freon 123 liquid at room temperature was carried out under the following conditions: energizing voltage: AC 110 V between lines, AC 440 V between lines: 36 cycles, 7 days, 1 cycle of sleeping at night.
5 minutes energization 5 minutes cooling test conditions 2 energization starting temperature 180℃, 20℃ until 240℃
Figure 2 shows the results of determining the temperature and time for short circuit while increasing the heating temperature step by step at a rate of 10° C./day. It can be seen that this example can withstand up to the highest temperature shown in FIG. 2 and can be stably used as winding insulation of a winding electric machine of a rotating electric machine. The ms results of the samples after the test showed that the iron cores were corroded in all cases except for this example.
これは使用された材料から抽出された物質が原因と考え
られる。また、比較例１および比較例２では巻線端部に
巻かれたポリエステルクロスのテープが切れ、巻線の固
定が不十分となっていた。This is thought to be due to substances extracted from the materials used. Furthermore, in Comparative Examples 1 and 2, the polyester cloth tape wrapped around the ends of the windings broke, resulting in insufficient fixation of the windings.
次に他の実施例について述べる。Next, other embodiments will be described.
上述の本実施例では、スロット絶縁、中敷絶縁としてポ
リイミドフィルムまたは芳香族ポリアミド紙を単独で用
いた方法について記述したが、両者を組み合わせて用い
てもよいし、また両者の貼り合わせ品を使用してもよい
、また、含浸樹脂としてｌＯＯ％ポリイミド成分から成
るワニス（例えばＰｙｒｅ−ＭＬ絶縁ワニスＲＫ−６９
２：デュポン社商品名）を用いてもよい。In the above-mentioned embodiment, a method was described in which polyimide film or aromatic polyamide paper was used alone as slot insulation and insole insulation, but a combination of both may be used, or a bonded product of both may be used. Alternatively, a varnish consisting of lOO% polyimide component (for example, Pyre-ML insulation varnish RK-69) may be used as the impregnating resin.
2: DuPont product name) may be used.
以上述べたように本発明によれば、絶縁を構成する材料
がフロン１２３に対して強く、フロン１２３浸漬下で運
転された際に、物質が抽呂されたり、クラックが入った
りすることが防止できるため。As described above, according to the present invention, the material constituting the insulation is strong against fluorocarbon 123, and the material is prevented from being extracted or cracked when the operation is immersed in fluorocarbon 123. Because I can.
故障し難く信頼性の高い回転電機を提供することができ
る。It is possible to provide a highly reliable rotating electric machine that is difficult to break down.
第１図は本発明の一実施例の構成を示す要部断面図、第
２図は巻線絶縁の耐フロン１２３性を評価した結果を示
す図である。
１・・・鉄心 ２・・・スロット絶縁３・・
・層間絶ｇ ４・・・楔
５・・・ポリイミド被覆絶縁電線FIG. 1 is a sectional view of a main part showing the configuration of an embodiment of the present invention, and FIG. 2 is a diagram showing the results of evaluating the resistance to fluorocarbon 123 of winding insulation. 1... Iron core 2... Slot insulation 3...
・Interlayer g 4...Wedge 5...Polyimide coated insulated wire
Claims (1)
冷媒として使用する回転電機において、電線としてポリ
イミド被覆絶縁電線、スロット絶縁としてポリイミドフ
ィルムまたは芳香族ポリアミド紙、含浸樹脂としてポリ
イミド成分を含有した樹脂を使用したことを特徴とする
回転電機。In a rotating electric machine that uses 2,2-dichloro-1,1,1-trifluoroethane as a refrigerant, polyimide coated insulated wire is used as the electric wire, polyimide film or aromatic polyamide paper is used as the slot insulation, and a polyimide component is contained as the impregnated resin. A rotating electrical machine characterized by the use of resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4127590A JPH03246384A (en) | 1990-02-23 | 1990-02-23 | Electric rotating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4127590A JPH03246384A (en) | 1990-02-23 | 1990-02-23 | Electric rotating machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03246384A true JPH03246384A (en) | 1991-11-01 |
Family
ID=12603896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4127590A Pending JPH03246384A (en) | 1990-02-23 | 1990-02-23 | Electric rotating machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03246384A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52133504A (en) * | 1976-05-04 | 1977-11-09 | Hitachi Ltd | End plate motor |
| JPS6233411A (en) * | 1985-08-07 | 1987-02-13 | Mitsubishi Electric Corp | Manufacture of iron core |
| JPH01269867A (en) * | 1988-04-20 | 1989-10-27 | Ebara Corp | Heat pump |
-
1990
- 1990-02-23 JP JP4127590A patent/JPH03246384A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52133504A (en) * | 1976-05-04 | 1977-11-09 | Hitachi Ltd | End plate motor |
| JPS6233411A (en) * | 1985-08-07 | 1987-02-13 | Mitsubishi Electric Corp | Manufacture of iron core |
| JPH01269867A (en) * | 1988-04-20 | 1989-10-27 | Ebara Corp | Heat pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Yin | Dielectric properties of an improved magnet wire for inverter-fed motors | |
| KR101174177B1 (en) | Superconductive cable withstand voltage test method | |
| JPH0284034A (en) | Oil charging type generator for submergible pump equipped with varnish not applied stator structure | |
| US4420536A (en) | Self-bonding magnet wire | |
| Wrobel et al. | Comparative study of copper and aluminium conductors-future cost effective PM machines | |
| US20140210302A1 (en) | Motor for use in refrigerant environment | |
| Han | Lifetime evaluation of class E electrical insulation for small induction motors | |
| JP2019527007A (en) | Motor with ammonia resistance for hermetic refrigeration compressor | |
| JPH03246384A (en) | Electric rotating machine | |
| US10670310B2 (en) | Motor for use in refrigerant environment | |
| JP2003134712A (en) | Rotating electric machine and manufacturing method therefor, and ammonia coolant compressor | |
| Frost et al. | Considerations for rotating low-voltage machine insulation designs | |
| JP2001115957A (en) | Closed type motor-driven compressor | |
| Nguyen et al. | Environmental assessment and dielectric performances of the secondary electrical insulation in low voltage motors impregnated by different techniques | |
| JP2699475B2 (en) | Insulation structure of rotating electric machine coil | |
| US11631514B2 (en) | Superconducting magnet with improved thermal and electrical stabilities and method for manufacturing the same | |
| Filliben | Advantages of polyimide corona resistant film under high frequency testing | |
| JP2003244894A (en) | Liquid circulation cooling type rotating machine | |
| JP2018186037A (en) | Superconductive cable line | |
| Malamud et al. | The development of semiconducting fiberglass tapes LSP-O, their properties, and their use for anti-corona protection of high voltage windings | |
| JPH02299437A (en) | Refrigerating cycle | |
| JPH04237A (en) | Refrigerant-resistant motor coil | |
| JPH08219594A (en) | Fefrigerating plant and closed type rotary electric machine for refrigerating plant | |
| Wade | Accelerated test performance of imide-modified magnet wire insulations for hermetic motors | |
| JPH0224005B2 (en) |