JPH0928065A - Squirrel-cage induction motor and its rotor - Google Patents
Squirrel-cage induction motor and its rotorInfo
- Publication number
- JPH0928065A JPH0928065A JP17727795A JP17727795A JPH0928065A JP H0928065 A JPH0928065 A JP H0928065A JP 17727795 A JP17727795 A JP 17727795A JP 17727795 A JP17727795 A JP 17727795A JP H0928065 A JPH0928065 A JP H0928065A
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- short
- bar
- circuit ring
- induction motor
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はかご形誘導電動機および
その回転子の改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a squirrel cage induction motor and its rotor.
【０００２】[0002]
【従来の技術】従来一般に採用されているこの種誘導電
動機の回転子は、シャフト上にバー溝を有する回転子鉄
心を複数枚軸方向に積層し、そしてその両端部に当て板
を当てがい、この積層鉄心が弛まぬよう固定している。
また、鉄心部のバー溝内に軸方向に伸びるロータバーが
挿入され、その両端にロータバー同志をリング状に短絡
する短絡環が設けられ形成されているのが普通である。2. Description of the Related Art A rotor of an induction motor of this type that has been generally adopted in the past has a plurality of rotor cores each having a bar groove on a shaft, which are laminated in the axial direction, and contact plates are applied to both ends thereof. This laminated iron core is fixed so as not to loosen.
Further, it is usual that a rotor bar extending in the axial direction is inserted into the bar groove of the iron core portion, and short-circuit rings for short-circuiting the rotor bars in a ring shape are provided at both ends of the rotor bar.
【０００３】なお、この種誘導電動機に関連するものと
しては、例えば特開平４−９１６４９号公報あるいは特
開昭５６−６６５７号公報などが挙げられる。[0003] Examples of the induction motor related to this type include JP-A-4-91649 and JP-A-56-6657.
【０００４】[0004]
【発明が解決しようとする課題】このように形成された
かご形誘導電動機は、比較的容量の小さなものにおいて
は特に問題になることはないのであるが、しかしながら
最近のように大容量のもの、また体格が切りつめられた
誘導電動機ともなると、誘導電動機の始動電流によりロ
ータバーおよび短絡環は温度が高くなるが鉄心より突出
した部分のロータバーおよび短絡環の周囲は空気である
ため熱伝導が悪く発生する熱を発散しずらく高温となり
易く電動機の出力に悪影響を及ぼす恐れがある。The squirrel cage induction motor thus formed does not cause any particular problem in the case of a relatively small capacity, however, it has a large capacity like the recent one. In addition, if it becomes an induction motor with a cut body, the temperature of the rotor bar and the short-circuit ring will rise due to the starting current of the induction motor, but the heat conduction will be poor because the area surrounding the rotor bar and the short-circuit ring protruding from the iron core is air. It is difficult to dissipate heat and the temperature tends to be high, which may adversely affect the output of the electric motor.
【０００５】また、積層鉄心の両端部を当て板により弛
まぬよう固定しているため、ロータバーおよび短絡環の
温度が上昇するとロータバーには軸方向に伸びる力が働
き、かつ短絡環は周方向に伸びる力が働くが、この時鉄
心のみが単独で固定されているため動くことなく、鉄心
端部より突出したロータバー部と短絡環のみが伸び変形
しロータバーと短絡環の接合部端に応力集中が働くこと
によりロータバーに欠損を生ずる嫌いがあり、特に回転
子鉄心と短絡環の間のロータバー部分の固有振動数は他
の部分に比べて小さく、高周波電源，例えばインバータ
ー電源等にて駆動される誘導電動機の場合には、その電
源周波数と共振し易くロータバーの欠損発生が顕著にな
る。Further, since both ends of the laminated iron core are fixed by the contact plates so as not to slacken, when the temperature of the rotor bar and the short-circuit ring rises, a force extending in the axial direction acts on the rotor bar and the short-circuit ring moves in the circumferential direction. A stretching force works, but at this time, only the iron core is fixed alone, and it does not move, and only the rotor bar portion and the short-circuit ring protruding from the end of the iron core expand and deform, and stress concentration occurs at the end of the joint between the rotor bar and the short-circuit ring. There is a tendency to cause damage to the rotor bar due to the action, especially the natural frequency of the rotor bar part between the rotor core and the short-circuit ring is smaller than other parts, and induction driven by a high frequency power supply such as an inverter power supply. In the case of an electric motor, it easily resonates with the power source frequency, and the occurrence of loss of the rotor bar becomes remarkable.
【０００６】本発明はこれに鑑みなされたもので、その
目的とするところは、ロータバーと短絡環の温度の低減
ができ、さらに短絡環の熱変形少なくロータバーの欠損
発生が少ないこの種かご形誘導電動機の回転子を提供す
るにある。The present invention has been made in view of the above circumstances, and an object of the present invention is to reduce the temperature of the rotor bar and the short-circuit ring, and to reduce the thermal deformation of the short-circuit ring and to reduce the occurrence of rotor bar defects. To provide a rotor for an electric motor.
【０００７】[0007]
【課題を解決するための手段】すなわち本発明は、シャ
フト上に積層され、かつ外周部にバー溝を有する回転子
積層鉄心と、この回転子積層鉄心のバー溝に挿入された
ロータバーと、このロータバーの軸方向両端に設けら
れ、かつロータバーにろう付け固着された短絡環とを備
えたかご形誘導電動機の回転子において、前記短絡環
を、前記回転子積層鉄心の軸方向端面および前記シャフ
トの表面と接触するように形成するとともに、前記ロー
タバーの端部を、この短絡環の端面より軸方向に突出す
るように形成し所期の目的を達成するようにしたもので
ある。That is, according to the present invention, there is provided a rotor laminated core having a bar groove on its outer periphery and laminated on a shaft, a rotor bar inserted into the bar groove of the rotor laminated core, and In a rotor of a squirrel-cage induction motor provided with axially opposite ends of a rotor bar, and a short-circuit ring brazed and fixed to the rotor bar, the short-circuit ring is provided with the axial end surface of the rotor laminated core and the shaft. The rotor bar is formed so as to be in contact with the surface, and the end portion of the rotor bar is formed so as to project in the axial direction from the end surface of the short-circuit ring to achieve the intended purpose.
【０００８】また、前記短絡環を、外周側に向かう程分
厚くなるように形成するとともに、この短絡環を、前記
回転子積層鉄心の軸方向端面および前記シャフトの表面
と接触するように配置し、かつ前記ロータバーを、その
端部が短絡環の端面より軸方向に突出するように形成し
たのである。また、ロータバーと短絡環とを結合する場
合、短絡環の外周面にバーの高さよりは小さな深さのバ
ー溝を設け、このバー溝にロータバーを嵌合し、ろう付
け固着するようにしたものである。Further, the short-circuit ring is formed so as to become thicker toward the outer peripheral side, and the short-circuit ring is arranged so as to be in contact with the axial end surface of the rotor laminated core and the surface of the shaft, Moreover, the rotor bar is formed so that its end portion projects in the axial direction from the end surface of the short-circuit ring. Further, when the rotor bar and the short-circuit ring are joined, a bar groove having a depth smaller than the height of the bar is provided on the outer peripheral surface of the short-circuit ring, and the rotor bar is fitted into this bar groove and fixed by brazing. Is.
【０００９】[0009]
【作用】このように形成されたかご形誘導電動機である
と、回転子鉄心用当て板の鉄心固定作用をリング状の短
絡環が兼ねるとともに、短絡環が回転子鉄心に密着しロ
ータバー・短絡環から鉄心への伝熱およびシャフトへの
伝熱が良くなり、さらに積層した鉄心と短絡環の間のロ
ータバーの長さが短くなることによりロータバーの固有
振動数は高くなる。In the cage-type induction motor thus formed, the ring-shaped short-circuit ring serves also as the core fixing action of the rotor core contact plate, and the short-circuit ring is in close contact with the rotor core to prevent rotor bar / short-circuit ring. The heat transfer from the core to the iron core and the heat transfer to the shaft are improved, and the length of the rotor bar between the laminated iron core and the short-circuit ring is shortened, so that the natural frequency of the rotor bar is increased.
【００１０】また、ロータバーが短絡環端部より軸方向
に突出していることにより突出部の内周側に通風経路の
障害物がなくなり冷却効率を高めロータバー・短絡環の
温度は低減される。また、回転子鉄心・ロータバー・短
絡環が軸方向に一体で動くことにより回転子鉄心より張
り出したロータバー・短絡環のみで伸びることがなくな
り、ロータバーと短絡環の接合部に応力集中が働くこと
もなくなり、ロータバーの欠損がなくなるのである。Further, since the rotor bar projects in the axial direction from the end portion of the short-circuit ring, there is no obstacle in the ventilation path on the inner peripheral side of the projecting portion, the cooling efficiency is improved, and the temperature of the rotor bar / short-circuit ring is reduced. In addition, since the rotor core, rotor bar, and short-circuit ring move integrally in the axial direction, the rotor bar and short-circuit ring protruding from the rotor core do not extend, and stress concentration may occur at the joint between the rotor bar and short-circuit ring. There is no loss of rotor bar.
【００１１】[0011]
【実施例】以下図示した実施例に基づいて本発明を詳細
に説明する。図３にはそのかご形誘導電動機が一部破断
して示されている。かご形誘導電動機は、ハウジング１
０、固定子１１および回転子２０を備え、この回転子２
０は軸受１２にて回動自在に軸支され、固定子の内部で
回転するように形成されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. In FIG. 3, the squirrel cage induction motor is shown in a partially broken state. The squirrel cage induction motor has a housing 1
0, a stator 11 and a rotor 20
0 is rotatably supported by a bearing 12 and is formed so as to rotate inside the stator.
【００１２】回転子２０は、図１および図２に示されて
いるように、回転子のシャフト１に円筒状の積層した積
層鉄心２を備え、その積層鉄心２には軸方向に貫通する
複数の溝部２ａが設けられている。また、積層鉄心２の
軸方向端部には短絡環３が設けられている。As shown in FIGS. 1 and 2, the rotor 20 is provided with a cylindrical laminated iron core 2 on a shaft 1 of the rotor, and the laminated iron core 2 has a plurality of axially penetrating cores 2. Is provided with a groove portion 2a. A short-circuit ring 3 is provided at the axial end of the laminated iron core 2.
【００１３】この短絡環はリング状に形成され、特に積
層鉄心２の側面と回転子のシャフト１とに接するように
形成され、設けられている。また、その外周上にロータ
バーと結合するための複数の溝部３ａをもっている。そ
して、鉄心部２の溝部２ａと短絡環３の溝部３ａは軸方
向に一致するようにしてあり、その溝部２ａ，３ａの中
には銅またはその合金により軸方向に伸びる複数のロー
タバー４を挿入し短絡環３と溶接等により接合されてい
る。また、このときロータバー４は短絡環３の端面より
軸方向に突出するように形成されている。This short-circuit ring is formed in a ring shape, and is formed and provided so as to be in contact with the side surface of the laminated iron core 2 and the shaft 1 of the rotor. Further, it has a plurality of groove portions 3a on its outer periphery for coupling with the rotor bar. The groove portion 2a of the iron core portion 2 and the groove portion 3a of the short-circuit ring 3 are made to coincide with each other in the axial direction, and a plurality of rotor bars 4 extending in the axial direction by copper or its alloy are inserted into the groove portions 2a, 3a. It is joined to the short-circuit ring 3 by welding or the like. At this time, the rotor bar 4 is formed so as to project in the axial direction from the end surface of the short-circuit ring 3.
【００１４】したがって、短絡環３が鉄心部２に密着し
ロータバー４・短絡環３から鉄心部２、またシャフトへ
の伝熱が良くなり、積層した鉄心部２と短絡環３の間の
ロータバー４の長さが短くなることによりロータバー４
の固有振動数は高くなる。さらに、ロータバー４を短絡
環３端部より軸方向に突出させることにより内周側に通
風経路の障害物がなくなり冷却効率を高めロータバー４
・短絡環３の温度は低減する。Therefore, the short-circuit ring 3 is in close contact with the iron core portion 2 so that heat transfer from the rotor bar 4 / short-circuit ring 3 to the iron core portion 2 and the shaft is improved, and the rotor bar 4 between the laminated iron core portion 2 and the short-circuit ring 3 is improved. As the length of the
Has a high natural frequency. Further, by projecting the rotor bar 4 in the axial direction from the end of the short-circuit ring 3, there are no obstacles in the ventilation path on the inner peripheral side, and the cooling efficiency is increased to improve the cooling efficiency.
-The temperature of the short circuit ring 3 is reduced.
【００１５】また、鉄心部２・ロータバー４・短絡環３
が軸方向に一体で動くことにより鉄心部２より張り出し
たロータバー４・短絡環３のみで伸びることがなくな
り、ロータバー４と短絡環３の接合部に応力集中が働く
こともなくなり、ロータバー４の欠損がなくなる。Further, the iron core portion 2, the rotor bar 4, the short-circuit ring 3
Of the rotor bar 4 and the short-circuiting ring 3 protruding from the iron core portion 2 as a result of the movement of the rotor bar integrally in the axial direction, stress concentration does not act on the joint between the rotor bar 4 and the short-circuiting ring 3, and the rotor bar 4 is damaged. Disappears.
【００１６】なお、ロータバー４と短絡環３とを溶接に
より接合する場合、図４および図５に示されているよう
に短絡環３の外径をロータバー上部までとすると、溝部
３ａが深くなりロータバー４との接触面積を確保でき有
効である。また、図６および図７は本発明の他の実施例
を示したもので、短絡環３の外径を小さくし、ロータバ
ー４の下面部に接触させることにより短絡環３の溝部３
ａの加工が無くなり作業を容易にしたものである。When the rotor bar 4 and the short-circuit ring 3 are joined by welding, if the outer diameter of the short-circuit ring 3 is set to the upper portion of the rotor bar as shown in FIGS. 4 and 5, the groove 3a becomes deeper and the rotor bar becomes deeper. This is effective because the contact area with 4 can be secured. 6 and 7 show another embodiment of the present invention, in which the outer diameter of the short-circuit ring 3 is reduced and the lower surface of the rotor bar 4 is brought into contact with the groove portion 3 of the short-circuit ring 3.
This eliminates the processing of a and facilitates the work.
【００１７】図８は本発明のさらに他の実施例を示した
もので、短絡環３の側面部に溝３ｂを全周に設けこれに
おもりを取付けロータのバランスを取り易くしたもの
で、その他は前述した実施例と同様のものである。FIG. 8 shows still another embodiment of the present invention in which a groove 3b is provided on the entire side surface of the short-circuit ring 3 to attach a weight to the groove 3b so that the rotor can be easily balanced. Is similar to the above-described embodiment.
【００１８】図９も本発明の他の実施例を示したもの
で、短絡環３の外径側を軸方向に厚くし内径側との厚み
を変えたも，すなわち外周側に向かう程分厚くなるよう
に形成したもので、短絡環３の溝部３ａは浅いままロー
タバー４の接触面積を大きくすることができ、また高温
となりがちなロータバー４側の熱容量が大きいので、短
絡環３の熱変形を小さくすることができる。FIG. 9 also shows another embodiment of the present invention, in which the outer diameter side of the short-circuit ring 3 is made thicker in the axial direction and the thickness thereof is changed from the inner diameter side, that is, it becomes thicker toward the outer peripheral side. Since the groove portion 3a of the short-circuit ring 3 is shallow, the contact area of the rotor bar 4 can be increased, and the heat capacity of the rotor bar 4 side, which tends to be high in temperature, is large. can do.
【００１９】図１０も本発明の他の実施例を示したもの
で、短絡環３の内径側を軸方向に厚くし外径側との厚み
を変えたもので、鉄心２の大型化による鉄心の弛みを防
止する効果が得られる。FIG. 10 also shows another embodiment of the present invention, in which the inner diameter side of the short-circuit ring 3 is made thicker in the axial direction and the thickness thereof is changed from the outer diameter side. The effect of preventing slack is obtained.
【００２０】上述のとおり本発明によれば、短絡環が回
転子鉄心に密着しロータバー・短絡環から鉄心への伝熱
およびシャフトへの伝熱が良くなり温度の低減が図れ、
また、回転子鉄心・ロータバー・短絡環が軸方向に一体
で動くためロータバーと短絡環の接合部の欠損を充分防
止することができる。As described above, according to the present invention, the short-circuit ring is in close contact with the rotor core, heat transfer from the rotor bar / short-circuit ring to the iron core and to the shaft is improved, and the temperature can be reduced.
Further, since the rotor core, the rotor bar, and the short-circuit ring move integrally in the axial direction, it is possible to sufficiently prevent the joint portion between the rotor bar and the short-circuit ring from being damaged.
【００２１】[0021]
【発明の効果】以上説明してきたように本発明によれ
ば、ロータバーおよび短絡環の温度の低減を図ることが
でき、さらに短絡環の熱変形少なくロータバーの欠損発
生が少ないこの種のかご形誘導電動機を得ることができ
る。As described above, according to the present invention, it is possible to reduce the temperatures of the rotor bar and the short-circuit ring, and further, the thermal deformation of the short-circuit ring is small, and the defect of the rotor bar is small. An electric motor can be obtained.
【図１】本発明のかご形誘導電動機の回転子の一実施例
を示す縦断側面図である。FIG. 1 is a vertical cross-sectional side view showing an embodiment of a rotor of a squirrel cage induction motor of the present invention.
【図２】図１のＡ−Ａ線に沿う断面図である。FIG. 2 is a sectional view taken along line AA of FIG.
【図３】本発明のかご形誘導電動機の一実施例を示す縦
断側面図である。FIG. 3 is a vertical sectional side view showing an embodiment of a squirrel cage induction motor of the present invention.
【図４】本発明のかご形誘導電動機の回転子の他の実施
例を示す縦断側面図である。FIG. 4 is a vertical sectional side view showing another embodiment of the rotor of the squirrel-cage induction motor of the present invention.
【図５】図４のＢ−Ｂ線に沿う断面図である。5 is a cross-sectional view taken along the line BB of FIG.
【図６】本発明のかご形誘導電動機の回転子の他の実施
例を示す縦断側面図である。FIG. 6 is a vertical sectional side view showing another embodiment of the rotor of the squirrel cage induction motor of the present invention.
【図７】図６のＣ−Ｃ線に沿う断面図である。FIG. 7 is a sectional view taken along line CC of FIG. 6;
【図８】本発明のかご形誘導電動機の回転子の他の実施
例を示す縦断側面図である。FIG. 8 is a vertical cross-sectional side view showing another embodiment of the rotor of the squirrel cage induction motor of the present invention.
【図９】本発明のかご形誘導電動機の回転子の他の実施
例を示す縦断側面図である。FIG. 9 is a vertical cross-sectional side view showing another embodiment of the rotor of the squirrel cage induction motor of the present invention.
【図１０】本発明のかご形誘導電動機の回転子の他の実
施例を示す縦断側面図である。FIG. 10 is a vertical sectional side view showing another embodiment of the rotor of the squirrel cage induction motor of the present invention.
１…シャフト１、２…積層鉄心、３…短絡環、４…ロー
タバー、１０…固定子、２０…回転子。1 ... Shaft 1, 2 ... Laminated iron core, 3 ... Short-circuit ring, 4 ... Rotor bar, 10 ... Stator, 20 ... Rotor.
フロントページの続き (72)発明者 平田 英世 茨城県日立市幸町三丁目１番１号 株式会 社日立製作所日立工場内 (72)発明者 斎藤 明雄 茨城県日立市幸町三丁目１番１号 株式会 社日立製作所日立工場内 (72)発明者 梶原 憲三 茨城県日立市幸町三丁目１番１号 株式会 社日立製作所日立工場内Front Page Continuation (72) Inventor Hideyo Hirata 3-1-1, Saiwaicho, Hitachi, Ibaraki Hitachi Ltd. Hitachi factory (72) Inventor Akio Saito 3-1-1, Saiwaicho, Hitachi, Ibaraki Hitachi Ltd., Hitachi Plant (72) Inventor Kenzo Kajiwara, 1-1 1-1, Saiwaicho, Hitachi City, Ibaraki Hitachi Ltd., Hitachi Plant
Claims (8)
ー溝を有する回転子積層鉄心と、該回転子積層鉄心のバ
ー溝に挿入されたロータバーと、該ロータバーの軸方向
両端に設けられ、かつロータバーに溶接固着された短絡
環とを備えたかご形誘導電動機の回転子において、 前記短絡環を、前記回転子積層鉄心の軸方向端面および
前記シャフトの表面と接触するように形成するととも
に、前記ロータバーの端部を、この短絡環の端面より軸
方向に突出するように形成したことを特徴とするかご形
誘導電動機の回転子。1. A rotor laminated iron core laminated on a shaft and having a bar groove on an outer peripheral portion, a rotor bar inserted into a bar groove of the rotor laminated iron core, and provided at both axial ends of the rotor bar. In a rotor of a cage induction motor having a short circuit ring welded and fixed to a rotor bar, the short circuit ring is formed so as to be in contact with the axial end surface of the rotor laminated core and the surface of the shaft, A rotor for a squirrel cage induction motor, wherein an end portion of the rotor bar is formed so as to project in an axial direction from an end surface of the short-circuit ring.
ー溝を有する回転子積層鉄心と、該回転子積層鉄心のバ
ー溝に挿入されたロータバーと、該ロータバーの軸方向
両端に設けられ、かつロータバーに溶接固着された短絡
環とを備えたかご形誘導電動機の回転子において、 前記短絡環を、外周側に向かう程分厚くなるように形成
するとともに、この短絡環を、前記回転子積層鉄心の軸
方向端面および前記シャフトの表面と接触するように配
置し、かつ前記ロータバーを、その端部が短絡環の端面
より軸方向に突出するように形成したことを特徴とする
かご形誘導電動機の回転子。2. A rotor laminated iron core laminated on a shaft and having a bar groove on an outer peripheral portion, a rotor bar inserted into a bar groove of the rotor laminated iron core, and provided on both axial ends of the rotor bar. In a rotor of a squirrel-cage induction motor including a short-circuit ring welded and fixed to a rotor bar, the short-circuit ring is formed so as to become thicker toward the outer peripheral side, and the short-circuit ring is formed on the rotor laminated iron core. Of the squirrel-cage induction motor, wherein the rotor bar is arranged so as to come into contact with the axial end surface of the shaft and the surface of the shaft, and the rotor bar is formed so that its end portion projects axially from the end surface of the short-circuit ring. Rotor.
絡環の外周面にバーの高さよりは小さな深さのバー溝を
設け、このバー溝にロータバーを嵌合し、かつ溶接固着
してなる請求項１若しくは２記載のかご形誘導電動機の
回転子。3. The rotor bar and the short-circuit ring are connected to each other by providing a bar groove having a depth smaller than the height of the bar on the outer peripheral surface of the short-circuit ring, and fitting the rotor bar into the bar groove and fixing the bar by welding. The rotor of the squirrel cage induction motor according to claim 1 or 2.
絡環の外周面にバーの高さと等しい深さおよび等しい幅
のバー溝を設け、このバー溝にロータバーを嵌合し、か
つその周囲を溶接固着してなる請求項１若しくは２記載
のかご形誘導電動機の回転子。4. The connection between the rotor bar and the short-circuit ring is provided with a bar groove having a depth and width equal to the height of the bar on the outer peripheral surface of the short-circuit ring, and the rotor bar is fitted in the bar groove and its periphery. The squirrel cage induction motor rotor according to claim 1 or 2, wherein the rotor is welded and fixed.
れてなる請求項１、２、３若しくは４記載のかご形誘導
電動機の回転子。5. The squirrel-cage induction motor rotor according to claim 1, wherein said short-circuit ring is shrink-fitted onto said shaft.
ー溝を有する回転子積層鉄心と、該回転子積層鉄心のバ
ー溝に挿入されたロータバーと、該ロータバーの軸方向
両端に設けられ、かつロータバーに溶接固着された短絡
環とを備えたかご形誘導電動機において、 前記回転子の短絡環を、前記回転子積層鉄心の軸方向端
面および前記シャフトの表面と接触するように形成する
とともに、前記ロータバーの端部を、この短絡環の端面
より軸方向に突出するように形成したことを特徴とする
かご形誘導電動機。6. A rotor laminated iron core laminated on a shaft and having a bar groove on an outer peripheral portion, a rotor bar inserted in a bar groove of the rotor laminated iron core, and provided on both axial ends of the rotor bar. In a cage induction motor having a short-circuit ring welded and fixed to a rotor bar, the short-circuit ring of the rotor is formed so as to be in contact with the axial end surface of the rotor laminated core and the surface of the shaft, A squirrel cage induction motor, wherein an end portion of the rotor bar is formed so as to project in an axial direction from an end surface of the short circuit ring.
ー溝を有する回転子積層鉄心と、該回転子積層鉄心のバ
ー溝に挿入されたロータバーと、該ロータバーの軸方向
両端に設けられ、かつロータバーに溶接固着された短絡
環とを備えたかご形誘導電動機において、 前記回転子の短絡環を、外周側に向かう程分厚くなるよ
うに形成するとともに、この短絡環を、前記回転子積層
鉄心の軸方向端面および前記シャフトの表面と接触する
ように配置し、かつ前記ロータバーを、その端部が短絡
環の端面より軸方向に突出するように形成したことを特
徴とするかご形誘導電動機。7. A rotor laminated iron core laminated on a shaft and having a bar groove on an outer peripheral portion, a rotor bar inserted into a bar groove of the rotor laminated iron core, and provided on both axial ends of the rotor bar. In a squirrel-cage induction motor having a short-circuit ring welded and fixed to a rotor bar, the short-circuit ring of the rotor is formed so as to become thicker toward the outer peripheral side, and the short-circuit ring is formed on the rotor laminated iron core. A squirrel-cage induction motor, which is arranged so as to contact the axial end surface of the shaft and the surface of the shaft, and the rotor bar is formed so that its end projects axially from the end surface of the short-circuit ring.
ー溝を有する回転子積層鉄心と、該回転子積層鉄心のバ
ー溝に挿入されたロータバーと、該ロータバーの軸方向
両端に設けられ、かつロータバーに溶接固着された短絡
環とを備えたかご形誘導電動機において、 前記回転子の短絡環を、外周側に向かう程分厚くなるよ
うに形成し、かつこの短絡環を、前記シャフト上に焼嵌
めするとともに、前記回転子積層鉄心の軸方向端面と接
触するように配置し、かつ前記ロータバーを、その端部
が短絡環の端面より軸方向に突出するように形成したこ
とを特徴とするかご形誘導電動機。8. A rotor laminated core laminated on a shaft and having a bar groove on an outer peripheral portion, a rotor bar inserted in a bar groove of the rotor laminated core, and provided at both axial ends of the rotor bar. In a squirrel-cage induction motor equipped with a short-circuit ring welded and fixed to a rotor bar, the short-circuit ring of the rotor is formed so as to become thicker toward the outer peripheral side, and the short-circuit ring is burned on the shaft. A cage characterized by being fitted and arranged so as to come into contact with the axial end surface of the rotor laminated iron core, and the rotor bar being formed so that its end portion projects axially from the end surface of the short-circuit ring. Type induction motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17727795A JPH0928065A (en) | 1995-07-13 | 1995-07-13 | Squirrel-cage induction motor and its rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17727795A JPH0928065A (en) | 1995-07-13 | 1995-07-13 | Squirrel-cage induction motor and its rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0928065A true JPH0928065A (en) | 1997-01-28 |
Family
ID=16028241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17727795A Pending JPH0928065A (en) | 1995-07-13 | 1995-07-13 | Squirrel-cage induction motor and its rotor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0928065A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6093988A (en) * | 1997-11-06 | 2000-07-25 | Kabushiki Kaisha Meidensha | Rotating electric machine usable in radioactive environment |
| US6133661A (en) * | 1997-11-06 | 2000-10-17 | Kabushiki Kaisha Meidensha | Rotating electric machine usable in radioactive environment |
| EP1643622A2 (en) * | 2004-09-30 | 2006-04-05 | Reliance Electric Technologies, LLC | Rotor for an induction device |
| JP2008522582A (en) * | 2004-12-03 | 2008-06-26 | エマーソン エレクトリック カンパニー | Cryogenic pump system, rotor, and method of pumping cryogenic fluid |
| JP2008148367A (en) * | 2006-12-06 | 2008-06-26 | Hitachi Industrial Equipment Systems Co Ltd | Rotary electric machine |
| JP2013005697A (en) * | 2011-06-22 | 2013-01-07 | Hitachi Industrial Equipment Systems Co Ltd | Induction motor |
-
1995
- 1995-07-13 JP JP17727795A patent/JPH0928065A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6093988A (en) * | 1997-11-06 | 2000-07-25 | Kabushiki Kaisha Meidensha | Rotating electric machine usable in radioactive environment |
| US6133661A (en) * | 1997-11-06 | 2000-10-17 | Kabushiki Kaisha Meidensha | Rotating electric machine usable in radioactive environment |
| EP1643622A2 (en) * | 2004-09-30 | 2006-04-05 | Reliance Electric Technologies, LLC | Rotor for an induction device |
| EP1643622A3 (en) * | 2004-09-30 | 2007-08-01 | Reliance Electric Technologies, LLC | Rotor for an induction device |
| JP2008522582A (en) * | 2004-12-03 | 2008-06-26 | エマーソン エレクトリック カンパニー | Cryogenic pump system, rotor, and method of pumping cryogenic fluid |
| JP4834675B2 (en) * | 2004-12-03 | 2011-12-14 | エマーソン エレクトリック カンパニー | Rotor, electrical equipment including rotor, and cryogenic pump system |
| JP2008148367A (en) * | 2006-12-06 | 2008-06-26 | Hitachi Industrial Equipment Systems Co Ltd | Rotary electric machine |
| JP2013005697A (en) * | 2011-06-22 | 2013-01-07 | Hitachi Industrial Equipment Systems Co Ltd | Induction motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Effective date: 20040413 Free format text: JAPANESE INTERMEDIATE CODE: A02 |