JP2006230054A - Motor, manufacturing method of motor, enclosed compressor, and refrigerating/air-conditioning device - Google Patents

Motor, manufacturing method of motor, enclosed compressor, and refrigerating/air-conditioning device Download PDF

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JP2006230054A
JP2006230054A JP2005038139A JP2005038139A JP2006230054A JP 2006230054 A JP2006230054 A JP 2006230054A JP 2005038139 A JP2005038139 A JP 2005038139A JP 2005038139 A JP2005038139 A JP 2005038139A JP 2006230054 A JP2006230054 A JP 2006230054A
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rotor
thin steel
stator
steel plates
core
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Osamu Kazama
修 風間
Tomoaki Oikawa
智明 及川
Yasuyoshi Tajima
庸賀 田島
Takahiro Tsutsumi
貴弘 堤
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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  • Applications Or Details Of Rotary Compressors (AREA)
  • Induction Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the deterioration of starting performance and the lowering of motor efficiency caused by a rotor of a motor that comprises a stator formed by laminating different two kinds or more of thin steel plates. <P>SOLUTION: This motor comprising the stator and the rotor each having a core formed by laminating the thin steel plates is characterized in that the core of the stator is formed by laminating the different two kinds or more of the thin steel plates, and the core of the rotor is formed by laminating one kind of the thin steel plate of the different two kinds of more of the thin steel plates. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は、薄肉鋼板を積層して構成される鉄心を有した固定子と回転子とを備えた電動機及びその製造方法及びその電動機を用いた密閉型圧縮機及びその密閉型圧縮機を用いた冷凍空調装置に関するものである。   The present invention uses an electric motor including a stator and a rotor having an iron core formed by laminating thin steel plates, a manufacturing method thereof, a hermetic compressor using the motor, and a hermetic compressor The present invention relates to a refrigeration air conditioner.

従来の薄肉鋼板を積層して構成される鉄心を有した電動機は、積層面に絶縁皮膜を有する１種類の薄肉鋼板のみで固定子鉄心及び回転子鉄心を形成するものが一般的であるが、主にコストを下げるために、絶縁被膜を有する薄肉鋼板と絶縁被膜を持たない薄肉鋼板を交互に積層しているものが知られている（例えば、特許文献１参照。）。   In general, an electric motor having an iron core formed by laminating conventional thin steel plates forms a stator core and a rotor core only with one type of thin steel plate having an insulating film on the laminated surface. In order to reduce costs mainly, a thin steel plate having an insulating coating and a thin steel plate not having an insulating coating are alternately stacked (for example, see Patent Document 1).

また、電磁鋼板は多数の種類が用意されているが、市場での需要量で価格が大きく異なる。例えば、ローグレイド材とハイグレイド材の主力材料は安価で、中間は高価という構図となっている。従って要求性能を達成するために使用する材料も、中間材を使用せず、ハイグレイド材を使用してオーバスペックとなることも多い。そこで、考えられるのがハイグレイド材とローグレイド材を複数混ぜて丁度良い性能と価格を得ることである。そのために、グレードの異なる電磁鋼板を一つのプレス型で同時に打抜き、積層している（例えば、特許文献２参照。）。
実開平９−１９０９０号公報 特開２００３−１８９５１４号公報 In addition, many types of electrical steel sheets are available, but prices vary greatly depending on the amount of demand in the market. For example, the main materials of low grade material and high grade material are inexpensive and the middle is expensive. Therefore, the material used to achieve the required performance is often over- spec using a high grade material without using an intermediate material. Therefore, it is conceivable to obtain a good performance and price by mixing a plurality of high grade materials and low grade materials. Therefore, electromagnetic steel sheets of different grades are simultaneously punched and laminated with one press die (for example, refer to Patent Document 2).
Japanese Utility Model Publication No. 9-19090 JP 2003-189514 A

薄肉鋼板より固定子と回転子の鉄心シートを同一プレス型内で打抜き、複数の異なる材料特性の薄肉鋼板からなる鉄心シートを交互に積層することで固定子鉄心と回転子鉄心を形成する電動機において、回転子鉄心も複数の薄肉鋼板から形成されることで、回転子鉄心の打ち抜かれたスロット形状が材料毎に異なるため、起動性や電動機効率が悪化するという問題があった。   In an electric motor that forms a stator core and a rotor core by punching the core sheet of the stator and rotor from a thin steel plate in the same press die, and alternately laminating core sheets made of thin steel plates of different material characteristics Further, since the rotor core is also formed of a plurality of thin steel plates, the shape of the slot into which the rotor core is punched differs depending on the material, so that there is a problem that startability and motor efficiency are deteriorated.

また、複数の材料を一つのプレス型から同時に打抜く場合、複数枚同時に打抜くための設備を導入する必要があり、大掛かりな設備投資が必要となるという問題があった。   Further, when a plurality of materials are simultaneously punched from a single press die, it is necessary to introduce equipment for punching a plurality of materials at the same time, and there is a problem that a large capital investment is required.

この発明は上記のような課題を解決するためになされたもので、第１の目的は異なる２種類以上の薄肉鋼板を積層することにより形成された固定子を持つ電動機の、回転子に起因する起動性悪化や電動機効率低下を抑制することである。   The present invention has been made to solve the above-described problems, and the first object is attributed to the rotor of an electric motor having a stator formed by laminating two or more different types of thin steel plates. It is to suppress the startability deterioration and the motor efficiency decrease.

また、第２の目的は大掛かりな設備投資を行なうことなく、回転子に起因する起動性悪化や電動機効率低下を抑制した電動機を得ることである。   A second object is to obtain an electric motor that suppresses deterioration in startability and reduction in electric motor efficiency caused by the rotor without making a large capital investment.

この発明に係る電動機は、薄肉鋼板を積層してなる鉄心を有した固定子と、回転子とを有する電動機において、固定子の鉄心は、異なる２種類以上の薄肉鋼板を積層することにより形成され、回転子の鉄心は、異なる２種類以上の薄肉鋼板の夫々の１種類の薄肉鋼板を積層することにより形成されたことを特徴とする。   An electric motor according to the present invention includes a stator having an iron core formed by laminating thin steel plates and a rotor, and the stator iron core is formed by laminating two or more different types of thin steel plates. The rotor core is formed by laminating one type of thin steel plate of two or more different types of thin steel plates.

この発明の電動機は、上記構成により、回転子に２種類以上の薄肉鋼板を用いたものに対し、回転子に起因する起動性悪化や電動機効率低下を抑制するという効果を有する。   With the above configuration, the electric motor of the present invention has an effect of suppressing deterioration in startability and reduction in electric motor efficiency caused by the rotor, compared to those using two or more types of thin steel plates for the rotor.

実施の形態１．
図１〜６は実施の形態１を示す図で、図１、２は電動機の縦断面図、図３は電動機の横断面図、図４は電動機のトルク特性を示す図、図５、６は変形例の電動機の縦断面図である。
図に示すように、電動機（この例では誘導電動機）は、固定子１と回転子７とから構成される。固定子１の固定子鉄心２は、２種類の異なる薄肉鋼板から打抜かれた固定子鉄心シート３ａと固定子鉄心シート３ｂとを１枚づつ交互に積層することで形成される。
ここでは、２種類の異なる薄肉鋼板を用いる例を示したが、２種類以上の異なる薄肉鋼板を用いてもよい。 Embodiment 1 FIG.
1 to 6 are diagrams showing the first embodiment, FIGS. 1 and 2 are longitudinal sectional views of the motor, FIG. 3 is a transverse sectional view of the motor, FIG. 4 is a diagram showing torque characteristics of the motor, and FIGS. It is a longitudinal cross-sectional view of the electric motor of a modification.
As shown in the figure, the electric motor (induction motor in this example) includes a stator 1 and a rotor 7. The stator core 2 of the stator 1 is formed by alternately stacking stator core sheets 3a and stator core sheets 3b punched from two different types of thin steel plates one by one.
Here, an example in which two different types of thin steel plates are used has been described, but two or more different types of thin steel plates may be used.

固定子鉄心シート３ａ、３ｂは、内径側に巻線４を巻回する為の固定子スロット５と、薄肉鋼板を凹凸形状にプレスし、積層する薄肉鋼板を嵌合して結合するカシメ６を有している。   The stator core sheets 3a and 3b include a stator slot 5 for winding the winding 4 on the inner diameter side, and a crimp 6 that presses the thin steel plate into an uneven shape and fits and joins the laminated thin steel plates. Have.

回転子７は、固定子１と同軸となるように固定子１の内径側に配置され、固定子鉄心２に使用した２種類の特性の異なる薄肉鋼板の、夫々の１種類の薄肉鋼板より形成された回転子鉄心シート８ａ、又は回転子鉄心シート８ｂを積層し（図１では固定子鉄心シート３ａと同一種類の薄肉鋼板を用い、図２では固定子鉄心シート３ｂと同一種類の薄肉鋼板を用いる）、回転子鉄心シートの外周側に設けられた回転子スロット９にアルミを鋳造することで２次導体バーを形成し、鉄心両端に設けられたエンドリング部１０でコアを固定すると共に導体バーを連結している。   The rotor 7 is arranged on the inner diameter side of the stator 1 so as to be coaxial with the stator 1 and is formed from two types of thin steel plates having different characteristics used for the stator core 2, respectively. The laminated rotor core sheet 8a or the rotor core sheet 8b is laminated (in FIG. 1, the same type of thin steel plate as the stator core sheet 3a is used, and in FIG. 2, the same type of thin steel plate as the stator core sheet 3b is used. Used), a secondary conductor bar is formed by casting aluminum in the rotor slot 9 provided on the outer peripheral side of the rotor core sheet, the core is fixed by the end ring portions 10 provided at both ends of the core and the conductor. The bars are connected.

この際、回転子のスロット打抜き形状が回転子鉄心シート毎に異なると、回転子スロット９内に鋳造したアルミが回転子鉄心シートの隙間から漏れて、隣り合うスロット間をアルミが連結してしまう（以後バー間短絡と呼ぶ）。しかし、本実施の形態では、回転子鉄心に１種類の薄肉鋼板を用いることにより、回転子鉄心シートの打抜き形状を統一化している為、バー間短絡しにくい構造となっている。   At this time, if the slot punching shape of the rotor is different for each rotor core sheet, the aluminum cast in the rotor slot 9 leaks from the gap between the rotor core sheets, and the aluminum is connected between adjacent slots. (Hereinafter referred to as bar short circuit). However, in the present embodiment, by using one kind of thin steel plate for the rotor core, the punching shape of the rotor core sheet is unified, so that it is difficult to short-circuit between bars.

使用する薄肉鋼板は、例えば、固定子１には０．３５ｍｍ厚で鉄損値が３．０ｗ／ｋｇの３５Ａ３００の電磁鋼板と、０．５ｍｍ厚で鉄損値が７．０ｗ／ｋｇの５０Ａ７００の電磁鋼板を用いて、コストを抑えつつ要求する鉄損値の鉄心と等価にすることで、新規材料を在庫することなく電動機を設計出来る。   The thin steel plate to be used is, for example, a 35A300 electromagnetic steel plate having a thickness of 0.35 mm and an iron loss value of 3.0 w / kg for the stator 1, and 50A700 having a thickness of 0.5 mm and an iron loss value of 7.0 w / kg. By using the electromagnetic steel sheet, it is possible to design an electric motor without stocking new materials by making it equivalent to the iron core of the required iron loss value while suppressing the cost.

回転子７は、固定子１と同一のプレス型で打抜かれる為、０．３５ｍｍ厚で鉄損値が３．０ｗ／ｋｇの３５Ａ３００の電磁鋼板のみで形成されたものと、０．５ｍｍ厚で鉄損値が７．０ｗ／ｋｇの５０Ａ７００の電磁鋼板のみで形成されたものと２種類が出来る。   Since the rotor 7 is punched with the same press die as the stator 1, the rotor 7 is formed of only a 35A300 electromagnetic steel sheet having a thickness of 0.35 mm and an iron loss value of 3.0 w / kg, and a thickness of 0.5 mm. Thus, there are two types, one made only of 50A700 electromagnetic steel sheet with an iron loss value of 7.0 w / kg.

次に動作について説明する。
このように構成された電動機において、巻線４に交流電流を流すと固定子１は回転磁界を発生し、その回転磁界が回転子７を横切ることで、回転子スロット９とエンドリング部１０で形成された導電回路内に誘導電流が流れ磁界を発生する。そして、それぞれの磁界の相互作用によりトルクが発生し回転子７が回転する。 Next, the operation will be described.
In the electric motor configured as described above, when an alternating current is passed through the winding 4, the stator 1 generates a rotating magnetic field, and the rotating magnetic field crosses the rotor 7, so that the rotor slot 9 and the end ring portion 10 An induced current flows in the formed conductive circuit to generate a magnetic field. Then, torque is generated by the interaction of the respective magnetic fields, and the rotor 7 rotates.

この際、回転子７にバー間短絡があると、図４に示すとおり電動機の起動トルクの低下、中間域での「たるみ」と呼ばれるトルク低下、最大トルクの低下が発生し、起動不良の発生や起動出来ても運転時のトルク不足から電動機効率の悪化が発生してしまう。   At this time, if the rotor 7 is short-circuited between the bars, as shown in FIG. 4, a decrease in the starting torque of the motor, a decrease in torque called “sag” in the intermediate region, and a decrease in the maximum torque occur, resulting in a start failure. Even if it can be started, the motor efficiency will deteriorate due to insufficient torque during operation.

また、薄肉鋼板は一般的に積層する表面に絶縁被膜を有した電磁鋼板が使用され、これらを積層することで回転磁界により固定子鉄心２に発生する渦電流を低減している。しかし、回転子７は運転時にすべりを発生する為に多少の磁界の変化があるものの、固定子１の回転磁界に比べ２〜５％程度と小さく、渦電流の影響は少ない。そこで、回転子７は０．３５ｍｍ厚で鉄損値が３．０ｗ／ｋｇの３５Ａ３００の電磁鋼板のみで形成されたものを使用しても、０．５ｍｍ厚で鉄損値が７．０ｗ／ｋｇの５０Ａ７００の電磁鋼板のみで形成されたものを使用しても電動機の特性に大きな影響は無い。   In addition, electromagnetic steel plates having an insulating coating on the surface to be laminated are generally used as thin steel plates, and by laminating these, eddy currents generated in the stator core 2 by a rotating magnetic field are reduced. However, although the rotor 7 has a slight magnetic field change due to slippage during operation, it is as small as about 2 to 5% compared to the rotating magnetic field of the stator 1 and is less affected by eddy currents. Therefore, even if the rotor 7 is made of only a 35A300 electromagnetic steel sheet having a thickness of 0.35 mm and an iron loss value of 3.0 w / kg, the iron loss value of 7.0 w / kg is 0.5 mm. There is no significant effect on the characteristics of the electric motor even if it is made of only a 50A700 electromagnetic steel sheet of kg.

図１、２では、固定子鉄心シート３ａと固定子鉄心シート３ｂとを１枚づつ交互に積層して固定子鉄心２を構成したが、図５、６に示すように、固定子鉄心シート３ａと固定子鉄心シート３ｂとを、例えば、３枚づつ交互に積層してもよい。要は複数枚づつ交互に積層してよいということである。但し、１個の固定子鉄心２に、ほぼ同じ枚数の固定子鉄心シート３ａと固定子鉄心シート３ｂとを使用することが、製造ロスを少なくするために必須である。   1 and 2, the stator core sheet 3a and the stator core sheet 3b are alternately laminated one by one to constitute the stator core 2. However, as shown in FIGS. 5 and 6, the stator core sheet 3a is formed. The stator core sheets 3b may be alternately stacked, for example, three by three. The point is that a plurality of sheets may be alternately stacked. However, it is indispensable to use substantially the same number of stator core sheets 3a and stator core sheets 3b in one stator core 2 in order to reduce manufacturing loss.

以上のように、回転子鉄心は１種類の薄肉鋼板を使用しており回転子鉄心シート８の形状がばらつかないようにしているので、容易に電動機の起動性の悪化や電動機効率の低下を抑制することができる。   As described above, the rotor core uses one type of thin steel plate so that the shape of the rotor core sheet 8 does not vary, so that the startability of the motor and the efficiency of the motor can be easily reduced. Can be suppressed.

実施の形態２．
以上の実施の形態１では、固定子鉄心に２種類以上の薄肉鋼板を用い、回転子鉄心には１種類の薄肉鋼板を用いるようにしたものであるが、次に２種類以上の薄肉鋼板の中に、薄肉鋼板の表面に絶縁被膜を有しているものと、有していないものを含む実施の形態２を説明する。 Embodiment 2. FIG.
In the first embodiment, two or more types of thin steel plates are used for the stator core and one type of thin steel plate is used for the rotor core. Next, two or more types of thin steel plates are used. In the following, Embodiment 2 will be described which includes one having an insulating coating on the surface of a thin steel plate and one having no insulating coating.

図７、８は実施の形態２を示す図で、電動機の縦断面図である。固定子鉄心２は表面に絶縁被膜を有していない薄肉鋼板より打抜かれた固定子鉄心シート３ｃと、薄肉鋼板の表面に絶縁被膜を有している薄肉鋼板より打抜かれた固定子鉄心シート３ｄを交互に積層することで形成される。交互に積層することにより、固定子鉄心シートが接触する面には必ず絶縁被膜が存在する為、固定子鉄心内部で発生する渦電流は抑制することが可能である。   7 and 8 are views showing the second embodiment, and are longitudinal sectional views of the electric motor. The stator core 2 has a stator core sheet 3c punched from a thin steel plate having no insulating coating on the surface, and a stator core sheet 3d punched from a thin steel plate having an insulating coating on the surface of the thin steel plate. Are alternately stacked. By alternately laminating, since an insulating coating always exists on the surface that contacts the stator core sheet, eddy currents generated inside the stator core can be suppressed.

これにより、例えば表面に絶縁被膜を持たないＳＰＣＣ（冷延鋼板）材などの安価な材料を用いることで、コストを抑えることが可能である。   Thereby, for example, it is possible to reduce the cost by using an inexpensive material such as an SPCC (cold rolled steel plate) material having no insulating coating on the surface.

回転子７は、図７のように絶縁被膜を有していない薄肉鋼板より打抜かれた回転子鉄心シート８ｃのみで形成されるものと、図８のように絶縁被膜を有している薄肉鋼板より打抜かれた回転子鉄心シート８ｄのみで形成されるものと２種類出来るが、前述の通り回転子７に発生する渦電流は固定子１に比べると小さく、どちらの回転子７を使用しても電動機の特性に大きな影響は無い。   The rotor 7 is formed only by a rotor core sheet 8c punched from a thin steel plate not having an insulating coating as shown in FIG. 7, and a thin steel plate having an insulating coating as shown in FIG. There are two types, one formed only by the punched rotor core sheet 8d, but as described above, the eddy current generated in the rotor 7 is smaller than that of the stator 1, and which rotor 7 is used. However, there is no significant effect on the characteristics of the motor.

上記では、固定子鉄心２は表面に絶縁被膜を有していない薄肉鋼板より打抜かれた固定子鉄心シート３ｃと、薄肉鋼板の表面に絶縁被膜を有している薄肉鋼板より打抜かれた固定子鉄心シート３ｄを交互に積層することで形成されるものを示したが、２種類以上の薄肉鋼板の中に、薄肉鋼板の表面に絶縁被膜を有しているものと、有していないものを含む場合には、隣接する２枚の薄肉鋼板の中の少なくとも１枚は絶縁被膜を持つものを用いて形成される。   In the above, the stator core 2 has a stator core sheet 3c punched from a thin steel plate having no insulating coating on the surface, and a stator punched from a thin steel plate having an insulating coating on the surface of the thin steel plate. Although what was formed by laminating | stacking the iron core sheet | seat 3d alternately was shown, what has an insulation film in the surface of a thin steel plate in two or more types of thin steel plates, and what does not have If included, at least one of the two adjacent thin steel plates is formed using an insulating coating.

以上のように、固定子鉄心は表面に絶縁被膜を有していない薄肉鋼板と、絶縁被膜を有する薄肉鋼板から打抜いた固定子鉄心シートを交互に積層し、回転子鉄心は１種類の薄肉鋼板のみで形成される為、コストを抑えながら容易に電動機の起動性悪化や電動機効率の低下を抑制することができる。   As described above, the stator core is formed by alternately laminating thin steel plates having no insulating coating on the surface and stator core sheets punched from the thin steel plates having the insulating coating, and the rotor core has one type of thin wall. Since it is formed only from a steel plate, it is possible to easily suppress deterioration in startability of the motor and reduction in motor efficiency while suppressing cost.

実施の形態３．
以上の実施の形態１，２では、固定子鉄心に２種類以上の薄肉鋼板を用い、回転子鉄心には１種類の薄肉鋼板を用いるようにしたものであるが、ここではその製造方法に関する実施の形態３を説明する。
図９、１０は実施の形態３を示す図で、図９は鉄心プレス型概略図、図１０は固定子鉄心と回転子鉄心の製造フローを示す図である。 Embodiment 3 FIG.
In the first and second embodiments described above, two or more types of thin steel plates are used for the stator core, and one type of thin steel plate is used for the rotor core. Form 3 will be described.
FIGS. 9 and 10 are diagrams showing the third embodiment, FIG. 9 is a schematic diagram of an iron core press die, and FIG. 10 is a diagram showing a manufacturing flow of a stator core and a rotor core.

図９において、ロールフィーダーにより供給された薄板鋼板は、プレス１ストローク毎に例えば風穴、回転子内径、回転子スロット、回転子外径、固定子スロット、固定子内径、固定子外径の順に打抜かれる。外径を打抜かれた回転子鉄心はメス型内に配置された溝内で積層され、所定枚数になると排出される。   In FIG. 9, the sheet steel supplied by the roll feeder is applied in the order of, for example, air holes, rotor inner diameter, rotor slot, rotor outer diameter, stator slot, stator inner diameter, stator outer diameter for each press stroke. It is pulled out. The rotor core punched out of the outer diameter is stacked in a groove arranged in the female mold and discharged when a predetermined number of sheets are reached.

複数の材料を用いる本発明では、材料毎にそれぞれ異なる金型で打抜き、固定子は金型から排出された後に異なる材料のプレスを所定の割合で積層し鉄心を構成し、回転子は材料毎の打抜きで積層された鉄心をそのまま使用する（図１０参照）。
この場合、固定子は金型外でカシメにより積層してもよい。 In the present invention using a plurality of materials, each material is punched with a different die, the stator is discharged from the die, and then a press of different materials is laminated at a predetermined ratio to constitute an iron core, and the rotor is made for each material. Are used as they are (see FIG. 10).
In this case, the stator may be laminated by caulking outside the mold.

以上のように、材料毎に異なる金型を使用することで、既存の金型設備を用いて容易に製造することが可能であり、各材料の機械特性に対応した金型調整が出来る為、打抜き精度を向上し、精度のばらつきによる起動性悪化や電動機効低下を抑制することが出来る。   As described above, by using different molds for each material, it can be easily manufactured using existing mold equipment, and mold adjustment corresponding to the mechanical characteristics of each material can be performed. The punching accuracy can be improved, and deterioration of startability and reduction in motor efficiency due to variations in accuracy can be suppressed.

実施の形態４．
以上の実施の形態１乃至３では、固定子鉄心に２種類以上の薄肉鋼板を用い、回転子鉄心には１種類の薄肉鋼板を用いるようにしたものの構成及び製造方法であるが、ここではその形状に関する実施の形態４を説明する。 Embodiment 4 FIG.
In the first to third embodiments described above, the structure and the manufacturing method are such that two or more types of thin steel plates are used for the stator core and one type of thin steel plate is used for the rotor core. Embodiment 4 regarding the shape will be described.

図１１は実施の形態４を示す図で、電動機の横断面図である。固定子鉄心２は、２種類の異なる薄肉鋼板から打抜かれた、固定子鉄心シートを積層することで形成される。積層した固定子鉄心シートはカシメ６が無い為、外周を溶接することにより固定子鉄心シート同士を結合している。   FIG. 11 is a cross-sectional view of the electric motor according to the fourth embodiment. The stator core 2 is formed by laminating stator core sheets punched from two different types of thin steel plates. Since the laminated stator core sheets do not have crimps 6, the stator core sheets are joined together by welding the outer periphery.

回転子７は固定子１と同軸となるように固定子１の内径側に配置され、１種類の薄肉鋼板より形成された回転子鉄心シートを積層し、固定子鉄心２と同様に薄肉鋼板を凹凸形状にプレスし、積層する薄肉鋼板を嵌合して結合するカシメ６により結合されている。回転子鉄心シートは外周側に回転子スロット９が設けられ、回転子スロット９にはアルミを鋳造し２次導体バーを形成し、鉄心両端に設けられたエンドリング部で導体バーを連結している。   The rotor 7 is arranged on the inner diameter side of the stator 1 so as to be coaxial with the stator 1, and a rotor core sheet formed of one type of thin steel plate is laminated, and similarly to the stator core 2, the thin steel plate is laminated. It presses in an uneven | corrugated shape, and it couple | bonds by the crimping 6 which fits and couple | bonds the thin steel plate to laminate | stack. The rotor core sheet is provided with a rotor slot 9 on the outer peripheral side, aluminum is cast into the rotor slot 9 to form a secondary conductor bar, and the conductor bars are connected by end ring portions provided at both ends of the core. Yes.

これら電動機鉄心は、材料毎にそれぞれ異なる金型で打抜き、固定子１はカシメを設けていない為、金型から排出された後に異なる材料のプレスを所定の割合で積層し鉄心を構成する。ここでは鉄心の結合方法として外周を溶接する方法を説明しているが、接着剤やクリータと呼ばれる楔による結合でも良い。回転子７は、打抜き後に金型内で同一材料コア同士カシメにより積層される。   These motor iron cores are punched with different dies for each material, and the stator 1 is not provided with caulking. Therefore, after discharging from the mold, presses of different materials are laminated at a predetermined ratio to constitute the iron core. Here, a method of welding the outer periphery is described as a method of connecting the iron cores, but bonding by a wedge called an adhesive or a cleaner may be used. The rotor 7 is laminated by caulking between the same material cores in the mold after punching.

以上のように、回転子７にはカシメを設け金型内で鉄心シートを結合し鉄心を形成きる構造とし、固定子１にはカシメを設けないことで異なる金型で打抜き後鉄心を形成するようにしているので、固定子１及び回転子７共に同一の１種類の材料で製作する既存の金型設備及び組立て設備を用いて容易に製造することが可能な為に設備投資が少なくて済み、回転子を組立てる手間が簡略化される分製造コストを抑えることができる。   As described above, a caulking is provided on the rotor 7 and the iron core sheet is joined in the mold to form an iron core, and the iron core is formed after punching with a different mold by not providing the caulking on the stator 1. As a result, both the stator 1 and the rotor 7 can be easily manufactured using existing mold equipment and assembly equipment that are manufactured from the same type of material. The manufacturing cost can be reduced because the labor for assembling the rotor is simplified.

実施の形態５．
以上の実施の形態１乃至４では、電動機の構成及び製造方法であるが、ここではその電動機を用いた密閉型圧縮機に関する実施の形態５を説明する。
図１２は実施の形態５を示す図で、密閉型圧縮機の縦断面図である。ここでは、２気筒ロータリ圧縮機を例に説明する。図において、円筒状の密閉容器２１は、上部容器２１ａと下部容器２１ｂとからなる。密閉容器２１内部に、圧縮要素２２を下部に、圧縮要素２２を駆動する実施の形態１乃至４のいずれかで述べた固定子１と回転子７からなる電動機を上部に収容している。固定子１は、外径が中間部容器の内径より大きな固定子鉄心２を持ち、この鉄心部分が下部容器２１ｂに焼嵌めされ固定されている。回転子７は回転子鉄心部分が圧縮要素２２を駆動する回転軸に焼嵌めされている。圧縮要素２２はスポット溶接にて固定子１と回転子７の中心がほぼ同軸となるよう下部容器２１ｂに固定される。上部容器２１ａと下部容器２１ｂは一部が重なるように嵌合され、外周を溶接により密閉される。 Embodiment 5. FIG.
In the first to fourth embodiments described above, the configuration and the manufacturing method of the electric motor are described. Here, the fifth embodiment related to a hermetic compressor using the electric motor will be described.
FIG. 12 shows the fifth embodiment, and is a longitudinal sectional view of a hermetic compressor. Here, a two-cylinder rotary compressor will be described as an example. In the figure, a cylindrical sealed container 21 includes an upper container 21a and a lower container 21b. Inside the hermetic container 21, the compression element 22 is accommodated in the lower part, and the electric motor composed of the stator 1 and the rotor 7 described in any of Embodiments 1 to 4 for driving the compression element 22 is accommodated in the upper part. The stator 1 has a stator core 2 whose outer diameter is larger than the inner diameter of the intermediate container, and this core part is shrink-fitted and fixed to the lower container 21b. In the rotor 7, the rotor core portion is shrink-fitted to a rotating shaft that drives the compression element 22. The compression element 22 is fixed to the lower container 21b by spot welding so that the centers of the stator 1 and the rotor 7 are substantially coaxial. The upper container 21a and the lower container 21b are fitted so as to partially overlap, and the outer periphery is sealed by welding.

次に、動作について簡単に説明する。密閉型圧縮機は冷凍回路に組み込まれ冷媒と圧縮要素を潤滑する冷凍機油が封入される。電動機に電源よりエネルギーが供給されると、回転子７が回転し圧縮要素２２を駆動する。すると、冷媒は吸入マフラー２３を通り圧縮要素２２に吸入され、圧縮された後に密閉容器２１内に吐出される。圧縮要素２２から吐出された冷媒は圧縮要素２２の上に配置される固定子１の密閉容器２１との隙間、固定子１や回転子７の鉄心に設けられた貫通孔、固定子１と回転子７の空隙等を通り上部容器２１ａに配置される吐出管２４より冷媒回路内に送られる。また、吐出管２４から冷媒が吐出される前に冷媒と分離された冷凍機油は、固定子１や回転子７の鉄心に設けられた貫通孔、固定子１と回転子７の空隙等を通り、密閉容器下部に戻る。   Next, the operation will be briefly described. The hermetic compressor is incorporated in a refrigeration circuit and encloses refrigeration oil that lubricates the refrigerant and the compression element. When energy is supplied from the power source to the motor, the rotor 7 rotates and drives the compression element 22. Then, the refrigerant passes through the suction muffler 23 and is sucked into the compression element 22 and is discharged into the sealed container 21 after being compressed. The refrigerant discharged from the compression element 22 has a gap with the sealed container 21 of the stator 1 disposed on the compression element 22, a through hole provided in the iron core of the stator 1 or the rotor 7, and the stator 1 and the rotation. It passes through the voids of the child 7 and is sent into the refrigerant circuit from the discharge pipe 24 arranged in the upper container 21a. Further, the refrigerating machine oil separated from the refrigerant before the refrigerant is discharged from the discharge pipe 24 passes through a through hole provided in the iron core of the stator 1 and the rotor 7, a gap between the stator 1 and the rotor 7, and the like. Return to the bottom of the sealed container.

密閉型圧縮機は、起動する際に圧縮要素２２の持つイナーシャによる回転抵抗を回転させる為のトルクと、圧縮要素２２の圧縮機構内に存在する冷媒、場合によっては液状化した冷媒を圧縮もしくは排出する為のトルクが必要である。したがって、電動機回転子のバー間短絡による電動機起動トルクの低下は防止する必要がある。   The hermetic compressor compresses or discharges the torque for rotating the rotational resistance caused by the inertia of the compression element 22 and the refrigerant existing in the compression mechanism of the compression element 22 or, in some cases, the liquefied refrigerant. Torque is necessary to Therefore, it is necessary to prevent a decrease in motor starting torque due to a short circuit between bars of the motor rotor.

ここでは、ロータリ圧縮機について述べたが、固定子１が密閉容器２１に嵌合されている密閉型圧縮機であれば、スクロール式圧縮機等圧縮要素の機構を問わない。   Although the rotary compressor has been described here, the mechanism of the compression element such as the scroll compressor is not limited as long as the stator 1 is fitted in the hermetic container 21.

以上のように、密閉型圧縮機に実施の形態１乃至４のいずれかの電動機を用いることで、電動機の材料費を押さえた上で、起動性の悪化や電動機効率低下を抑制することができる。   As described above, by using the electric motor according to any one of Embodiments 1 to 4 for the hermetic compressor, it is possible to suppress deterioration in startability and reduction in electric motor efficiency while suppressing the material cost of the electric motor. .

実施の形態６．
以上の実施の形態５では、実施の形態１乃至４の電動機を用いた密閉型圧縮機について述べたが、ここではその密閉型圧縮機を用いた冷凍空調装置に関する実施の形態６を説明する。
図１３は実施の形態６を示す図で、冷凍空調装置の冷媒回路の概略構成図である。図において、実施の形態５で説明した密閉型圧縮機３０、この密閉型圧縮機３０からの冷媒の流れを切換える四方切換弁３１、室外側熱交換器３２、電動膨張等の減圧装置３３、室内側熱交換器３４、密閉型圧縮機３０の吸入側配管に接続され、冷媒を貯留するアキュムレータ３５は配管を介して順次接続され、冷凍回路が形成されている。 Embodiment 6 FIG.
In the above fifth embodiment, the hermetic compressor using the electric motors of the first to fourth embodiments has been described. Here, a sixth embodiment related to a refrigeration air conditioner using the hermetic compressor will be described.
FIG. 13 is a diagram showing the sixth embodiment, and is a schematic configuration diagram of a refrigerant circuit of a refrigeration air conditioner. In the figure, the hermetic compressor 30 described in the fifth embodiment, a four-way switching valve 31 for switching the flow of refrigerant from the hermetic compressor 30, an outdoor heat exchanger 32, a decompression device 33 such as electric expansion, The accumulator 35 that is connected to the inner heat exchanger 34 and the suction-side piping of the hermetic compressor 30 and stores the refrigerant is sequentially connected via the piping to form a refrigeration circuit.

次に、以上のように構成された冷凍回路の制御装置の動作について暖房動作、冷房動作の順で説明する。
暖房運転が開始されると、四方切換弁３１は図１３の実線側に接続されるので、密閉型圧縮機３０で圧縮された高温高圧の冷媒は室内側熱交換器３４に流れ、凝縮し、液化した後、減圧装置３３で絞られ、低温低圧の二相状態となり、室外側熱交換器３２へ流れ、蒸発し、ガス化して四方切換弁３１、アキュムレータ３５を通って再び密閉型圧縮機３０に戻る。即ち、図１３の実線矢印に示すように冷媒は循環する。 Next, the operation of the control device for the refrigeration circuit configured as described above will be described in the order of the heating operation and the cooling operation.
When the heating operation is started, the four-way switching valve 31 is connected to the solid line side in FIG. 13, so the high-temperature and high-pressure refrigerant compressed by the hermetic compressor 30 flows to the indoor heat exchanger 34 and condenses. After liquefaction, it is squeezed by the decompression device 33 to become a low-temperature and low-pressure two-phase state, flows to the outdoor heat exchanger 32, evaporates and gasifies, and passes through the four-way switching valve 31 and the accumulator 35, and is again sealed. Return to. That is, the refrigerant circulates as shown by the solid line arrows in FIG.

次に、冷房運転について説明する。冷房運転が開始されると、四方切換弁３１は図１３の点線側に接続されるので、密閉型圧縮機３０で圧縮された高温高圧の冷媒は室外側熱交換器３２に流れ、凝縮し、液化した後、減圧装置３３で絞られ、低温低圧の二相状態となり、室内側熱交換器３４へ流れ、蒸発し、ガス化して四方切換弁３１、アキュムレータ３５を通って再び密閉型圧縮機３０に戻る。即ち、暖房運転から冷房運転に変わると、室内側熱交換器３４が凝縮器から蒸発器に変わり、室外側熱交換器３２が蒸発器から凝縮器に変わる。   Next, the cooling operation will be described. When the cooling operation is started, the four-way switching valve 31 is connected to the dotted line side in FIG. 13, so the high-temperature and high-pressure refrigerant compressed by the hermetic compressor 30 flows to the outdoor heat exchanger 32 and condenses. After being liquefied, it is throttled by the decompression device 33 to become a low-temperature and low-pressure two-phase state, flows to the indoor heat exchanger 34, evaporates and gasifies, passes through the four-way switching valve 31 and the accumulator 35, and again is the hermetic compressor 30. Return to. That is, when the heating operation is changed to the cooling operation, the indoor heat exchanger 34 is changed from the condenser to the evaporator, and the outdoor heat exchanger 32 is changed from the evaporator to the condenser.

このような冷凍システムにおいて、暖房動作、冷房動作により室内機側熱交換器を所望の温度に調整を行なう為に、密閉型圧縮機３０は起動・停止を繰り返す。その為、密閉型圧縮機３０の起動安定性を確保する必要がある。   In such a refrigeration system, the hermetic compressor 30 is repeatedly started and stopped in order to adjust the indoor unit side heat exchanger to a desired temperature by heating operation and cooling operation. Therefore, it is necessary to ensure the starting stability of the hermetic compressor 30.

以上のように、冷凍システムに実施の形態５の密閉型圧縮機を用いることで、電動機の材料費を押さえた上で、起動性を確保することができる。   As described above, by using the hermetic compressor of the fifth embodiment in the refrigeration system, startability can be ensured while suppressing the material cost of the electric motor.

実施の形態１を示す図で、電動機の縦断面図である。It is a figure which shows Embodiment 1 and is a longitudinal cross-sectional view of an electric motor. 実施の形態１を示す図で、電動機の縦断面図である。It is a figure which shows Embodiment 1 and is a longitudinal cross-sectional view of an electric motor. 実施の形態１を示す図で、電動機の横断面図である。It is a figure which shows Embodiment 1 and is a cross-sectional view of an electric motor. 実施の形態１を示す図で、電動機のトルク特性を示す図である。It is a figure which shows Embodiment 1, and is a figure which shows the torque characteristic of an electric motor. 実施の形態１を示す図で、変形例の電動機の縦断面図である。It is a figure which shows Embodiment 1 and is a longitudinal cross-sectional view of the electric motor of a modification. 実施の形態１を示す図で、変形例の電動機の縦断面図である。It is a figure which shows Embodiment 1 and is a longitudinal cross-sectional view of the electric motor of a modification. 実施の形態２を示す図で、電動機の縦断面図である。It is a figure which shows Embodiment 2, and is a longitudinal cross-sectional view of an electric motor. 実施の形態２を示す図で、電動機の縦断面図である。It is a figure which shows Embodiment 2, and is a longitudinal cross-sectional view of an electric motor. 実施の形態３を示す図で、鉄心プレス型概略図である。It is a figure which shows Embodiment 3, and is an iron core press type | mold schematic. 実施の形態３を示す図で、固定子鉄心と回転子鉄心の製造フローを示す図である。It is a figure which shows Embodiment 3, and is a figure which shows the manufacturing flow of a stator core and a rotor core. 実施の形態４を示す図で、電動機の横断面図である。It is a figure which shows Embodiment 4, and is a cross-sectional view of an electric motor. 実施の形態５を示す図で、密閉型圧縮機の縦断面図である。It is a figure which shows Embodiment 5, and is a longitudinal cross-sectional view of a hermetic compressor. 実施の形態６を示す図で、冷凍空調装置の冷媒回路の概略構成図である。It is a figure which shows Embodiment 6, and is a schematic block diagram of the refrigerant circuit of a refrigerating air conditioning apparatus.

符号の説明Explanation of symbols

１ 固定子、２ 固定子鉄心、３ａ，３ｂ 固定子鉄心シート、３ｃ 絶縁被膜を有していない薄肉鋼板より打抜かれた固定子鉄心シート、３ｄ 絶縁被膜を有している薄肉鋼板より打抜かれた固定子鉄心シート、４ 巻線、５ 固定子スロット、６ カシメ、７ 回転子、８ａ，８ｂ 回転子鉄心シート、８ｃ 絶縁被膜を有していない薄肉鋼板より打抜かれた回転子鉄心シート、８ｄ 絶縁被膜を有している薄肉鋼板より打抜かれた回転子鉄心シート、９ 回転子スロット、１０ エンドリング部、２１ 密閉容器、２１ａ 上部容器、２１ｂ 下部容器、２２ 圧縮要素、２３ 吸入マフラー、２４ 吐出管、３０ 密閉型圧縮機、３１ 四方切換弁、３２ 室外側熱交換器、３３ 減圧装置、３４ 室内側熱交換器、３５ アキュムレータ。   DESCRIPTION OF SYMBOLS 1 Stator, 2 Stator core, 3a, 3b Stator core sheet, 3c Stator core sheet punched from thin steel plate without insulation coating, 3d Punched from thin steel plate with insulation coating Stator core sheet, 4 windings, 5 stator slot, 6 caulking, 7 rotor, 8a, 8b rotor core sheet, 8c rotor core sheet punched from thin steel plate without insulation coating, 8d insulation Rotor core sheet punched from thin steel plate with coating, 9 rotor slot, 10 end ring part, 21 sealed container, 21a upper container, 21b lower container, 22 compression element, 23 suction muffler, 24 discharge pipe , 30 hermetic compressor, 31 four-way switching valve, 32 outdoor heat exchanger, 33 pressure reducing device, 34 indoor heat exchanger, 35 accumulator.

Claims (6)

薄肉鋼板を積層してなる鉄心を有した固定子と、回転子とを有する電動機において、
前記固定子の鉄心は、異なる２種類以上の薄肉鋼板を積層することにより形成され、前記回転子の鉄心は、前記異なる２種類以上の薄肉鋼板の夫々の１種類の薄肉鋼板を積層することにより形成されたことを特徴とする電動機。 In an electric motor having a stator having an iron core formed by laminating thin steel plates, and a rotor,
The stator iron core is formed by laminating two or more different types of thin steel plates, and the rotor iron core is obtained by laminating one type of each of the two or more different thin steel plates. An electric motor characterized by being formed. 薄肉鋼板を積層してなる鉄心を有した固定子と、回転子とを有する電動機において、
前記固定子の鉄心は、薄肉鋼板の表面に絶縁被膜を持つものと、持たないものを含んだ２種類以上の薄肉鋼板を用いて形成され、且つ隣接する２枚の薄肉鋼板の中の少なくとも１枚は絶縁被膜を持つものを用いて形成され、前記回転子の鉄心は、前記異なる２種類以上の薄肉鋼板の夫々の１種類の薄肉鋼板を積層することにより形成されたことを特徴とする電動機。 In an electric motor having a stator having an iron core formed by laminating thin steel plates, and a rotor,
The iron core of the stator is formed by using two or more types of thin steel plates including those having an insulating coating on the surface of the thin steel plate and those not having, and at least one of two adjacent thin steel plates. The sheet is formed using an insulating film, and the iron core of the rotor is formed by laminating one type of thin steel plate of each of the two or more different types of thin steel plates. . 前記回転子鉄心に用いられる薄肉鋼板は、薄肉鋼板を金型で所定形状に打抜く際に形成した凹凸の嵌合により、積層間を連結保持するカシメ部を有することを特徴とする請求項１又は請求項２記載の電動機。   The thin-walled steel plate used for the rotor core has a caulking portion that connects and holds the stacked layers by fitting of irregularities formed when the thin-walled steel plate is punched into a predetermined shape with a die. Or the electric motor of Claim 2. 異なる２種類以上の薄肉鋼板を積層して形成した固定子鉄心と、前記異なる２種類以上の薄肉鋼板の夫々の１種類の薄肉鋼板を積層することにより形成した回転子鉄心を持つ電動機において、
前記固定子鉄心は材料毎に異なる金型で所定形状に打抜き、金型設備より排出された後に積層し、前記回転子鉄心は夫々の金型内で積層されること特徴とする電動機の製造方法。 In an electric motor having a stator core formed by laminating two or more different types of thin steel plates, and a rotor core formed by laminating one type of each of the two or more types of thin steel plates,
The stator core is punched into a predetermined shape with different dies for each material, stacked after being discharged from a mold facility, and the rotor core is stacked in each mold. . 密閉容器内に固定子と回転子を有する電動要素と、これによって駆動される圧縮要素を収納した密閉型圧縮機において、
前記電動要素に請求項１乃至４のいずれかに記載の電動機を用いたことを特徴とする密閉型圧縮機。 In a hermetic compressor containing an electric element having a stator and a rotor in a hermetic container, and a compression element driven thereby,
A hermetic compressor using the electric motor according to any one of claims 1 to 4 as the electric element. 請求項５記載の密閉型圧縮機を使用することを特徴とする冷凍空調装置。   A refrigerating air conditioner using the hermetic compressor according to claim 5.
JP2005038139A 2005-02-15 2005-02-15 Motor, manufacturing method of motor, enclosed compressor, and refrigerating/air-conditioning device Pending JP2006230054A (en)

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