JPH1118342A - Electric apparatus - Google Patents
Electric apparatusInfo
- Publication number
- JPH1118342A JPH1118342A JP18742097A JP18742097A JPH1118342A JP H1118342 A JPH1118342 A JP H1118342A JP 18742097 A JP18742097 A JP 18742097A JP 18742097 A JP18742097 A JP 18742097A JP H1118342 A JPH1118342 A JP H1118342A
- Authority
- JP
- Japan
- Prior art keywords
- induction motor
- slot
- plastic sheet
- bubble
- containing plastic
- 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
- 230000006698 induction Effects 0.000 claims abstract description 32
- 239000002985 plastic film Substances 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims description 8
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 7
- 229920006255 plastic film Polymers 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims 1
- 239000002966 varnish Substances 0.000 abstract description 3
- 239000012212 insulator Substances 0.000 abstract 2
- -1 polyethylene Polymers 0.000 description 12
- 239000003507 refrigerant Substances 0.000 description 10
- 239000011810 insulating material Substances 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 239000010687 lubricating oil Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000004793 Polystyrene Substances 0.000 description 4
- 230000007062 hydrolysis Effects 0.000 description 4
- 238000006460 hydrolysis reaction Methods 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 229920002223 polystyrene Polymers 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 229920005862 polyol Polymers 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 229920003020 cross-linked polyethylene Polymers 0.000 description 2
- 239000004703 cross-linked polyethylene Substances 0.000 description 2
- RWRIWBAIICGTTQ-UHFFFAOYSA-N difluoromethane Chemical compound FCF RWRIWBAIICGTTQ-UHFFFAOYSA-N 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- GTLACDSXYULKMZ-UHFFFAOYSA-N pentafluoroethane Chemical compound FC(F)C(F)(F)F GTLACDSXYULKMZ-UHFFFAOYSA-N 0.000 description 2
- 229920001515 polyalkylene glycol Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 229920006290 polyethylene naphthalate film Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 description 1
- LLLVZDVNHNWSDS-UHFFFAOYSA-N 4-methylidene-3,5-dioxabicyclo[5.2.2]undeca-1(9),7,10-triene-2,6-dione Chemical compound C1(C2=CC=C(C(=O)OC(=C)O1)C=C2)=O LLLVZDVNHNWSDS-UHFFFAOYSA-N 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
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229920003055 poly(ester-imide) Polymers 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Landscapes
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はインバ−タで速度制
御される誘導電動機を備えた低電圧電気機器に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-voltage electric device having an induction motor whose speed is controlled by an inverter.
【０００２】[0002]
【従来の技術】誘導電動機で駆動される家庭用電気機
器、例えば、冷凍機や空調機の熱交換冷却器等において
は、誘導電動機の速度制御にインバ−タを使用すること
が公知であり、この場合、インバ−タのインバ−タ部の
キャリア周波数に起因する電動機の電磁力騒音を可聴周
波数帯域より高い周波数にして騒音軽減を図ることが要
請され、その一般的手段として、高キャリア周波数のＰ
ＷＭ制御（pulse width modula control)方式の低騒音
型インバ−タが知られている。2. Description of the Related Art It is known that an inverter is used for controlling the speed of an induction motor in household electric equipment driven by an induction motor, for example, a heat exchange cooler of a refrigerator or an air conditioner. In this case, it is required to reduce the electromagnetic force noise of the motor caused by the carrier frequency of the inverter section to a frequency higher than the audible frequency band to reduce the noise. P
2. Description of the Related Art A low-noise inverter of the WM (pulse width modula control) type is known.
【０００３】一般に低騒音型インバ−タの使用のもとで
は、インバ−タ部のトランジスタ−のスイッチング速度
が高速であり、スイッチングごとに発生する漏れ電流の
変化が急峻であり、電磁波ノイズが発生すること、イン
バ−タから電動機に至る間のインダクタンスやキャパシ
タンスによりＬＣ共振が生じてサ−ジが発生すること、
スイッチングによる過渡的漏れ電流と回路電圧による定
常漏れ電流とが発生すること等が、一般に問題とされ
る。而るに、上記の家庭用電気機器の場合、電磁波ノイ
ズについては、電気機器の金属ケ−スで遮蔽され、ま
た、サ−ジについては、インバ−タから電動機に至る間
のインダクタンスやキャパシタンスが小さくその共振周
波数が高次であるために、実際上殆ど問題にならない。In general, under the use of a low-noise inverter, the switching speed of the transistor in the inverter is high, the change in leakage current generated at each switching is steep, and electromagnetic wave noise is generated. That LC resonance occurs due to inductance and capacitance from the inverter to the motor, and that surge occurs,
It is generally considered that a transient leakage current due to switching and a steady leakage current due to circuit voltage occur. However, in the case of the above-mentioned household electric equipment, electromagnetic wave noise is shielded by a metal case of the electric equipment, and the surge has an inductance and a capacitance from the inverter to the electric motor. Since it is small and its resonance frequency is higher, there is practically no problem.
【０００４】[0004]
【発明が解決しようとする課題】上記家庭用電気機器に
おける配線は、長さが極く短く、その被覆材の誘電率が
ポリエチレン電線や架橋ポリエチレン電線では２に近く
低誘電率である。これに対し、誘導電動機の絶縁材、す
なわち、スロットライナ−、ウエッジ、マグネットワイ
ヤ−の被覆材、段間絶縁材、含浸ワニス等においては、
誘電率が相当に高く、上記過渡的漏れ電流及び定常的漏
れ電流は無視できない。特に、電気冷凍機においては、
オゾン層の破壊防止のために冷媒がフロンからＨＦＣ等
の新冷媒に代替されつつあり、このＨＦＣの誘電率がフ
ロンの誘電率よりも高く、更に冷媒の代替に伴い潤滑油
も鉱油からポリアルキレングリコ−ル、ポリオ−ルエス
テル等に替えられつつあり、この潤滑油が吸湿性であっ
て比抵抗が低いために、１００〜２００Ｖクラスの低電
圧機器であっても、上記漏れ電流の一層の増大が懸念さ
れ、問題が大きい。The wiring in the above-mentioned household electric equipment has a very short length, and the covering material has a low dielectric constant close to 2 for a polyethylene wire or a crosslinked polyethylene wire. On the other hand, the insulating material of the induction motor, that is, the coating material of the slot liner, the wedge, the magnet wire, the interstage insulating material, the impregnated varnish, etc.
The dielectric constant is quite high and the transient and steady leakage currents cannot be ignored. In particular, in electric refrigerators,
In order to prevent the destruction of the ozone layer, refrigerants are being replaced by new refrigerants such as HFCs from CFCs. The dielectric constant of this HFC is higher than that of CFCs. Glycols, polyol esters, etc. are being replaced. Since the lubricating oil is hygroscopic and has a low specific resistance, the leakage current is further increased even in a low voltage device of 100 to 200 V class. There is concern and the problem is great.
【０００５】本発明の目的は、高キャリア周波数のＰＷ
Ｍ制御方式の低騒音型インバ−タで誘導電動機の速度制
御を良好に行い得る電気機器を提供することにある。It is an object of the present invention to provide a high carrier frequency PW.
It is an object of the present invention to provide an electric device capable of controlling the speed of an induction motor satisfactorily with an M control type low noise inverter.
【０００６】[0006]
【課題を解決するための手段】本発明に係る電気機器
は、インバ−タ及びインバ−タで速度制御される誘導電
動機を備え、該誘導電動機におけるステ−タの鉄心のス
ロット内面に装着するスロットライナ−に気泡含有プラ
スチックシ−トを用いたことを特徴とする構成であり、
ステ−タの鉄心のスロット口に装着するウエッジ、ステ
−タのコイルエンドの絶縁被覆材、ステ−タのリ−ド線
を包囲する絶縁チュ−ブにも、気泡含有プラスチックシ
−トを用いることができる。An electric device according to the present invention includes an inverter and an induction motor whose speed is controlled by the inverter, and a slot mounted on an inner surface of a slot of a core of a stator of the induction motor. It is a configuration characterized by using a bubble-containing plastic sheet for the liner,
A bubble-containing plastic sheet is also used for the wedge mounted on the slot of the iron core of the stator, the insulating coating material for the coil end of the stator, and the insulating tube surrounding the lead wire of the stator. be able to.
【０００７】[0007]
【発明の実施の形態】以下、図面を参照しつつ本発明の
実施の形態について説明する。図１は本発明に係る電気
機器の一例としての電気冷凍機を示している。図１にお
いて、１は機器ケ−ス、ＡＣは１００〜２００Ｖ電源、
２はインバ−タ、３は誘導電動機、４はインバ−タ２と
誘導電動機３との間を接続した配線である。５は冷媒回
路を示し、誘導電動機３で圧縮機５１を駆動して冷媒を
圧縮のうえ吐出口５２からケ−ス５３内に吐出させ、こ
の圧縮冷媒を凝縮器５４において放熱液化させ、この液
化冷媒を受液器５５を経て膨張弁５６に移送して膨張さ
せ、更に蒸発器５７を通過する間に被冷却物の熱を吸熱
させて蒸発させつつ被冷却物を冷却し、この蒸発冷媒を
再び圧縮器５１で圧縮し、以後、上記を１サイクルとし
て繰り返していく。この冷却循環回路の閉塞を防止し、
可動部の摩耗を防止するために、上記冷媒には潤滑油が
混合される。上記冷媒には、ＨＦＣ−３２（ＣＨ
2Ｆ2）、ＨＦＣ−１２５（ＣＨＦ2ＣＦ3）、ＨＦＣ−１
３４ａ（ＣＨ2ＦＣＦ3）等の混合冷媒を使用でき、潤滑
油にはこの混合冷媒との相溶性に優れたポリアルキレン
グリコ−ル、ポリオ−ルエステル、ポリカ−ボネ−トま
たはポリエ−テル油等を使用できる。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an electric refrigerator as an example of an electric device according to the present invention. In FIG. 1, 1 is an equipment case, AC is a 100 to 200 V power supply,
2 is an inverter, 3 is an induction motor, and 4 is a wiring connecting between the inverter 2 and the induction motor 3. Reference numeral 5 denotes a refrigerant circuit. The compressor 51 is driven by the induction motor 3 to compress the refrigerant and discharge it into the case 53 from the discharge port 52. The compressed refrigerant is radiated and liquefied in the condenser 54 to liquefy. The refrigerant is transferred to the expansion valve 56 via the liquid receiver 55 and expanded, and while passing through the evaporator 57, the heat of the object to be cooled is absorbed and evaporated to cool the object to be cooled. The compression is performed again by the compressor 51, and thereafter, the above is repeated as one cycle. Prevent blockage of this cooling circuit,
Lubricating oil is mixed with the refrigerant in order to prevent wear of the movable part. HFC-32 (CH
2 F 2), HFC-125 (CHF 2 CF 3), HFC-1
34a (CH 2 FCF 3 ) or the like can be used, and lubricating oils such as polyalkylene glycol, polyol ester, polycarbonate or polyether oil having excellent compatibility with the mixed refrigerant can be used. Can be used.
【０００８】図２の（イ）は図１における誘導電動機３
の拡大図を、図２の（ロ）は同電動機の断面の一部を示
している。図２において、３１はステ−タを示し、鉄心
３１１のスロット３１２内面にスロットライナ−ａを装
着し、このスロット３１２内にコイル３１３を装着する
と共にコイル３１３内に段間絶縁材ｂを組み込み、更に
スロット口にウェッジｃを装着し、コイル３１３全体を
ワニスで含浸してあり、スロットライナ−ａ、ウェッジ
ｃ、段間絶縁材ｂ等には、独立気泡の気泡含有プラスチ
ックシ−トを使用してある。図２において、３１０はス
テ−タである。図示していないが、コイルエンド３１
３’を上記の気泡含有プラスチックシ−トで包囲し、こ
の包囲シ−トを結束コ−ドでコイルエンドに固定してあ
る。図２の（イ）において、３１４は各コイル端に接続
したリ−ド線、３１５はこれらのリ−ド線を集合してそ
の上に挿通した絶縁チュ−ブであり、上記の気泡含有プ
ラスチックシ−トをチュ−ブに形成してある。図示して
いないが、各コイル端と各リ−ド線との接続部の絶縁補
強、リ−ド線とコイルエンドとの間の下絶縁、渡り線の
絶縁等にも上記の気泡含有プラスチックシ−トを基材と
する粘着テ−プを使用することが好ましい。この粘着テ
−プの粘着剤層には気泡を含有させることが好ましい。FIG. 2A shows the induction motor 3 shown in FIG.
FIG. 2B shows a part of a cross section of the electric motor. In FIG. 2, reference numeral 31 denotes a stator, in which a slot liner-a is mounted on an inner surface of a slot 312 of an iron core 311, a coil 313 is mounted in the slot 312, and an interstage insulating material b is incorporated in the coil 313. Further, a wedge c is attached to the slot opening, and the entire coil 313 is impregnated with varnish. For the slot liner-a, wedge c, interstage insulating material b, etc., a closed-cell-bubble plastic sheet is used. It is. In FIG. 2, reference numeral 310 denotes a statuser. Although not shown, the coil end 31
3 'is surrounded by the above-mentioned bubble-containing plastic sheet, and this surrounding sheet is fixed to the coil end by a binding cord. In FIG. 2A, 314 is a lead wire connected to each coil end, and 315 is an insulating tube that collects these lead wires and passes through them. The sheet is formed in a tube. Although not shown, the above-described bubble-containing plastic sheet is also used for reinforcing the insulation of the connection between each coil end and each lead wire, lower insulation between the lead wire and the coil end, and insulation of the crossover. It is preferable to use an adhesive tape having a base material as a base material. The pressure-sensitive adhesive layer of the pressure-sensitive adhesive tape preferably contains bubbles.
【０００９】上記の気泡含有プラスチックシ−トには独
立気泡のものが使用され、例えば、ポリエチレンテレフ
タレ−ト１００重量部、ポリスチレン３〜４５重量部の
混合物、またはポリエチレンテレフタレ−ト１００重量
部、ポリスチレン３〜４５重量部、平均粒径１〜２０μ
ｍの無機質充填剤（二酸化珪素、炭酸カルシウム、二酸
化チタン、硫酸バリウム）０．０１〜３０重量部の混合
物をＴダイにより、またはインフレ−ション法によりシ
−ト状に押出し、このシ−トをポリスチレンの２次転移
点近傍乃至は２次転移点以下で２軸延伸することにより
ポリエチレン粒子とエチレンテレフタレ−トポリマ−と
の界面に剪断変形を生じさせて空洞を発生させたものを
使用でき、延伸率やポリマ−混合比等の調整により、気
泡含有率を２０％以上、誘電率（周波数５０HZ〜１MHZ)
を２．５％以下にすることが可能である。As the above-mentioned plastic sheet containing cells, closed-cell plastic sheets are used. For example, 100 parts by weight of polyethylene terephthalate, a mixture of 3-45 parts by weight of polystyrene, or 100 parts by weight of polyethylene terephthalate , Polystyrene 3 to 45 parts by weight, average particle size 1 to 20μ
A mixture of 0.01 to 30 parts by weight of an inorganic filler (silicon dioxide, calcium carbonate, titanium dioxide, barium sulfate) is extruded in a sheet form by a T-die or by an inflation method. Polystyrene which is biaxially stretched in the vicinity of the secondary transition point or lower than the secondary transition point to cause shear deformation at the interface between the polyethylene particles and the ethylene terephthalate polymer to generate cavities can be used, By adjusting the stretching ratio, polymer mixing ratio, etc., the bubble content is 20% or more and the dielectric constant (frequency 50 Hz to 1 MHz)
Can be reduced to 2.5% or less.
【００１０】上記の冷凍機においては、誘導電動機が加
熱状態の潤滑油混合冷媒に接触され、上記のＨＦＣ−３
２（ＣＨ2Ｆ2）、ＨＦＣ−１２５（ＣＨＦ2ＣＦ3）、Ｈ
ＦＣ−１３４ａ（ＣＨ2ＦＣＦ3）等の冷媒やポリアルキ
レングリコ−ル、ポリオ−ルエステルまたはポリカ−ボ
ネ−ト等の潤滑油のもとでは、加水分解劣化やオリゴマ
−抽出劣化が懸念されるので、上記気泡含有プラスチッ
クシ−トの両面に耐加水分解性及び低オリゴマ−のプラ
スチックフィルムを積層することが好ましく、この場
合、気泡含有プラスチックシ−トの厚みｔは５０〜２０
０μｍとされ、耐加水分解性及び低オリゴマ−のプラス
チックフィルムの厚みｔ’は１６〜５０μｍとされる。
この耐加水分解性及び低オリゴマ−のプラスチックフィ
ルムとしては、低オリゴマ−ポリエチレンテレフタレ−
ト、ポリエチレンナフタレ−ト、ポリフェニレンサルフ
アィド、ポリテトラフロオルエチレン、溶融異方向性芳
香族ポリエステル、ポリアミドまたはポリイミド等の無
気泡合成樹脂フィルム等を使用できる。[0010] In the above refrigerator, the induction motor is brought into contact with the lubricating oil mixed refrigerant in the heated state, and the above HFC-3
2 (CH 2 F 2 ), HFC-125 (CHF 2 CF 3 ), H
Under a refrigerant such as FC-134a (CH 2 FCF 3 ) or a lubricating oil such as polyalkylene glycol, polyol ester or polycarbonate, hydrolysis degradation and oligomer extraction deterioration are concerned. It is preferable to laminate a hydrolysis-resistant and low-oligomer plastic film on both sides of the bubble-containing plastic sheet. In this case, the thickness t of the bubble-containing plastic sheet is 50 to 20.
0 μm, and the thickness t ′ of the hydrolysis-resistant and low-oligomer plastic film is 16 to 50 μm.
As the plastic film having low hydrolysis resistance and low oligomer, low oligomer polyethylene terephthalate
And non-cellular synthetic resin films such as polyethylene naphthalate, polyphenylene sulfide, polytetrafluoroethylene, melt anisotropic aromatic polyester, polyamide and polyimide.
【００１１】上記電気機器のインバ−タ制御には、イン
バ−タ部のトランジスタのオン・オフ時間を調整して出
力周波数と出力電圧を変化させる、いわゆるＰＷＭ制御
を使用できる。この場合、電磁振動騒音を軽減するため
に、出力周波数を可聴周波数帯域より高くすることが要
求され、上記トランジスタ−の１秒間でのオン・オフ回
数、すなわち、スイッチングパルス数が大とされ、スイ
ッチング速度が高速とされる。而して、この高速スイ
ッチングによる電磁波の発生、インバ−タと誘導電動
機間の配線及び誘導電動機のインダクタンスＬと大地浮
遊容量Ｃとでスイッチング高調波がＬＣ共振されること
によるサ−ジの発生、漏れ電流の発生等が避けられな
い。For the inverter control of the electric equipment, a so-called PWM control, which changes the output frequency and the output voltage by adjusting the on / off time of the transistor of the inverter unit, can be used. In this case, in order to reduce the electromagnetic vibration noise, it is required that the output frequency be higher than the audible frequency band, and the number of on / off times of the transistor in one second, that is, the number of switching pulses is increased. The speed is assumed to be high. Thus, generation of electromagnetic waves due to the high-speed switching, generation of surges due to LC resonance of switching harmonics in the wiring between the inverter and the induction motor and the inductance L of the induction motor and the ground floating capacitance C, Leakage current is inevitable.
【００１２】而るに、の電磁波については、電気機器
の金属ケ−スのために外部への漏洩を防止でき、更に上
記配線にシ−ルド電線を使用することによりその漏洩防
止を完遂でき、住宅内での電磁波障害には至らないし、
のサ−ジについては、電気機器内の配線長さが短く、
上記インダクタンスＬが小であり、従って共振周波数が
スイッチング高調波の高次側となり、その高次高調波の
振幅が小さいために、その共振サ−ジが弱く機器に絶縁
障害を及ぼすまでには至らない。The electromagnetic wave can be prevented from leaking outside due to the metal case of the electrical equipment, and the leakage can be completed by using a shielded electric wire for the wiring. It does not lead to electromagnetic interference in the house,
About the surge of the above, the wiring length in the electric equipment is short,
Since the inductance L is small and the resonance frequency is on the higher side of the switching harmonic, and the amplitude of the higher harmonic is small, the resonance surge is weak enough to cause insulation failure in equipment. Absent.
【００１３】の漏れ電流には、スイッチング速度と浮
遊容量Ｃとの積に比例する過渡的漏れ電流と、スイッチ
ング周波数と浮遊容量Ｃと回路電圧の積に比例する定常
的漏れ電流があり、浮遊容量Ｃに大きく左右される。而
るに、本発明に係る電気機器においては、誘導電動機の
ステ−タの鉄心内面とコイルとの間に気泡含有プラスチ
ックシ−トを介在させており、スロットライナ−の誘電
率を２．５以下にでき、コイルから発生する電束の大部
分を占める、コイルと鉄心間の電束が通るフィルドの誘
電率を極めて低くできるから、誘導電動機の大地浮遊容
量を著しく低減できる（後述の通り、３０％以上の低減
が可能である）。更に、ウェッジ、段間絶縁材、コイル
エンド絶縁被覆材、リ−ド線の包囲絶縁チュ−ブにも気
泡含有プラスチックシ−トを使用すると、誘導電動機の
大地浮遊容量の一層の低減が期待できる。他方、配線側
については、配線長さが極めて短く、しかも電線の被覆
材の誘電率がかなり小であるために（ポリエチレン電
線、架橋ポリエチレン電線では２．０に近い）、インバ
−タと誘導電動機との間の配線の大地浮遊容量も極めて
小である。従って、本発明に係る電気機器においては、
漏れ電流も僅小にとどめ得、感電の危険や電力コストの
浪費を排除できる。The leakage current includes a transient leakage current proportional to the product of the switching speed and the stray capacitance C, and a stationary leakage current proportional to the product of the switching frequency, the stray capacitance C and the circuit voltage. It depends greatly on C. Thus, in the electric apparatus according to the present invention, a bubble-containing plastic sheet is interposed between the coil and the inner surface of the stator of the induction motor, and the dielectric constant of the slot liner is 2.5. Since the dielectric constant of the field, which occupies most of the electric flux generated from the coil and passes through the electric flux between the coil and the iron core, can be extremely low, the ground floating capacity of the induction motor can be significantly reduced (as described later, A reduction of 30% or more is possible). Furthermore, if a bubble-containing plastic sheet is also used for the wedge, the interstage insulating material, the coil end insulating covering material, and the insulating tube surrounding the lead wire, further reduction of the ground floating capacity of the induction motor can be expected. . On the other hand, on the wiring side, since the wiring length is extremely short and the permittivity of the covering material of the electric wire is very small (approximately 2.0 for polyethylene electric wire and cross-linked polyethylene electric wire), the inverter and the induction motor are not used. The ground stray capacitance of the wiring between them is also very small. Therefore, in the electric device according to the present invention,
Leakage current can also be kept small, eliminating the danger of electric shock and wasting power costs.
【００１４】本発明に係る電気機器において、誘導電動
機の大地浮遊容量の著しい低減を図り得ることは次ぎの
試験例からも確認できる。 〔試験例〕厚み１００μｍ、見かけ比重１．００、空洞
含有率約３０％の延伸空洞含有プラスチックフィルムの
両面に厚み５０μｍのポリエチレンナフタレ−トフィル
ムを融着した誘電率２．５（６０サイクル）の積層シ−
トを使用した。この延伸空洞含有プラスチックフィルム
は次のようにして製造した。すなわち、固有粘度０．６
２のポリエチレンテレフタレ−ト６５重量％とメルトフ
ロ−インデックス２．０のポリスチレン３５重量％との
混合物をベント式二軸押出機に供給して混練し、当該押
出機のＴダイより温度３０℃の冷却ドラム上に押し出し
て厚み約９００μｍの未延伸シ−トを得、引き続き、こ
の未延伸シ−トを８５℃に加熱し延伸ロ−ルにより温度
３．４倍で縦延伸し、次いで、テンタ−で１２０℃に加
熱して３．８倍で巾方向延伸を行い、巾固定のもとで２
２０℃、５秒間の巾固定熱処理を行い、更に、温度２２
０℃、４％にて巾方向緩和を行い、最終的に冷却した。
上記の積層シ−ト（厚みは接着剤厚みを含むため２５０
μｍ）をモ−タ容量０．７５ＫＷの誘導電動機のスロッ
トライナ−として使用した（試料１)。また、厚み２５
０μｍのポリエチレンナフタレ−トフィルム（６０サイ
クルでの誘電率３．０）を同上誘導電動機のスロットラ
イナ−として使用した(試料２）。これらそれぞれの誘
導電動機を冷凍機油に浸漬し、ＬＣＲメ−タにより誘電
率を測定したところ、試料２では２．４３であったのに
対し、試料１では１．５７であり、試料２に対し略３５
％も低減できた。The fact that the stray capacitance of the induction motor in the electric equipment according to the present invention can be remarkably reduced can be confirmed from the following test examples. [Test Example] A dielectric film having a dielectric constant of 2.5 (60 cycles) obtained by fusing a polyethylene naphthalate film having a thickness of 50 μm to both sides of a stretched cavity-containing plastic film having a thickness of 100 μm, an apparent specific gravity of 1.00, and a void content of about 30%. Laminated sheet
Used. This stretched cavity-containing plastic film was produced as follows. That is, the intrinsic viscosity is 0.6
A mixture of 65% by weight of polyethylene terephthalate and 35% by weight of polystyrene having a melt flow index of 2.0 was supplied to a vented twin-screw extruder and kneaded. The sheet was extruded on a cooling drum to obtain an unstretched sheet having a thickness of about 900 μm. Subsequently, the unstretched sheet was heated to 85 ° C. and stretched longitudinally at a temperature of 3.4 times by a stretching roll. -Heat to 120 ° C and stretch in the width direction by 3.8 times,
A width fixing heat treatment is performed at 20 ° C. for 5 seconds.
Relaxation in the width direction was performed at 0 ° C. and 4%, followed by cooling.
The above laminated sheet (thickness is 250
μm) was used as a slot liner for an induction motor having a motor capacity of 0.75 KW (sample 1). In addition, thickness 25
A 0 .mu.m polyethylene naphthalate film (dielectric constant at 60 cycles: 3.0) was used as the slot liner of the induction motor (Sample 2). Each of these induction motors was immersed in refrigerating machine oil, and the dielectric constant was measured by an LCR meter. As a result, the value was 2.43 in Sample 2, 1.57 in Sample 1, and 1.57 in Sample 2. About 35
% Could be reduced.
【００１５】[0015]
【発明の効果】本発明に係る電気機器においては、高キ
ャリア周波数のＰＷＭ制御方式の低騒音型インバ−タで
誘導電動機の速度制御を行うにもかかわらず、誘導電動
機のステ−タのスロットライナ−に気泡含有プラスチッ
クシ−トを使用するだけで、漏れ電流を充分に低減で
き、感電や騒音障害を排除して家庭での安全使用を保証
できる。In the electric apparatus according to the present invention, the slot liner of the stator of the induction motor is controlled in spite of the fact that the speed of the induction motor is controlled by a PWM type low noise inverter of a high carrier frequency. Only by using a plastic sheet containing air bubbles, leakage current can be sufficiently reduced, and electric shock and noise interference can be eliminated to ensure safe use at home.
【図１】本発明に係る電気器の説明に使用した図面であ
る。FIG. 1 is a drawing used to describe an electric device according to the present invention.
【図２】図１における誘導電動機を示す図面である。FIG. 2 is a view showing the induction motor in FIG. 1;
１ 機器ケ−ス ２ インバ−タ ３ 誘導電動機 ３１ ステ−タ ３１１ 鉄心 ａ スロットライナ− ｃ ウェッジ ３１３ コイルエンド ３１４ リ−ド線 ３１５ 絶縁チュ−ブ DESCRIPTION OF SYMBOLS 1 Equipment case 2 Inverter 3 Induction motor 31 Stator 311 Iron core a Slot liner c Wedge 313 Coil end 314 Lead wire 315 Insulation tube
───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐々木 靖 滋賀県大津市堅田二丁目１番１号 東洋紡 績株式会社内 (72)発明者 吉岡 泰男 大阪市北区天満三丁目11番12号 丸正株式 会社内 (72)発明者 山本 泰正 大阪市北区天満三丁目11番12号 丸正株式 会社内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasushi Sasaki 2-1-1 Katata, Otsu City, Shiga Prefecture Inside Toyobo Co., Ltd. (72) Inventor Yasuo Yoshioka 3-112, Tenma, Kita-ku, Osaka Marusho Shares In-house (72) Inventor Yasumasa Yamamoto 3-11-12 Tenma, Kita-ku, Osaka Marusho Co., Ltd.
Claims (5)
れる誘導電動機を備え、該誘導電動機におけるステ−タ
の鉄心のスロット内面に装着するスロットライナ−に気
泡含有プラスチックシ−トを用いたことを特徴とする電
気機器。An invertor and an induction motor whose speed is controlled by the inverter, wherein a bubble-containing plastic sheet is used for a slot liner mounted on an inner surface of a slot of a core of a stator of the induction motor. Electrical equipment characterized by having.
エッジに気泡含有プラスチックシ−トを用いた請求項１
記載の電気機器。2. A bubble-containing plastic sheet is used for a wedge mounted on a slot of a core of a stator.
Electrical equipment as described.
泡含有プラスチックシ−トを用いた請求項１または２記
載の電気機器。3. The electric device according to claim 1, wherein a bubble-containing plastic sheet is used as an insulating coating material for the coil end of the stator.
ブに気泡含有プラスチックシ−トのチュ−ブを用いた請
求項１乃至３何れか記載の電気機器。4. An insulating tube surrounding a lead wire of a stator.
4. The electric apparatus according to claim 1, wherein a tube of a plastic sheet containing air bubbles is used as the tube.
含有プラスチックシ−トの両面にプラスチックフィルム
を積層した複合体を使用した請求項１〜４何れか記載の
電気機器。5. The electric apparatus according to claim 1, wherein a composite having a plastic film laminated on both sides of the bubble-containing plastic sheet is used in place of the bubble-containing plastic sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18742097A JPH1118342A (en) | 1997-06-25 | 1997-06-25 | Electric apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18742097A JPH1118342A (en) | 1997-06-25 | 1997-06-25 | Electric apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1118342A true JPH1118342A (en) | 1999-01-22 |
Family
ID=16205744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18742097A Pending JPH1118342A (en) | 1997-06-25 | 1997-06-25 | Electric apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1118342A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010148275A (en) * | 2008-12-19 | 2010-07-01 | Nitto Shinko Kk | Stator for rotary electric machine and manufacturing method for stator for rotary electric machine |
-
1997
- 1997-06-25 JP JP18742097A patent/JPH1118342A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010148275A (en) * | 2008-12-19 | 2010-07-01 | Nitto Shinko Kk | Stator for rotary electric machine and manufacturing method for stator for rotary electric machine |
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