JP4937632B2 - Induction motor rotor and method of manufacturing induction motor rotor - Google Patents

Induction motor rotor and method of manufacturing induction motor rotor Download PDF

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JP4937632B2
JP4937632B2 JP2006122475A JP2006122475A JP4937632B2 JP 4937632 B2 JP4937632 B2 JP 4937632B2 JP 2006122475 A JP2006122475 A JP 2006122475A JP 2006122475 A JP2006122475 A JP 2006122475A JP 4937632 B2 JP4937632 B2 JP 4937632B2
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conductor
core
rotor
slot
wall portion
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JP2007295756A (en
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武雄 木村
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Mitsubishi Electric Corp
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/26—Rotor cores with slots for windings
    • H02K1/265—Shape, form or location of the slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
    • H02K17/20—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors having deep-bar rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Induction Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)

Description

本発明は、銅バー等の導体バーを組み込んだ誘導電動機の回転子及び誘導電動機の回転子の製造方法に関するものである。   The present invention relates to an induction motor rotor incorporating a conductor bar such as a copper bar and a method for manufacturing the rotor of an induction motor.

従来の誘導電動機の回転子として、円筒状鉄心（回転子コア）の外周部に軸方向の開口溝（開口スリット）を設けるとともに、この開口溝の側壁に軸方向の凹状溝を形成し、前記開口溝内に外周側開口部から圧入したアルミニウム等の棒状導体（導体バー）を外周側からローレットで押圧、変形させて凹状溝と係合させ、回転子の回転に伴って作用する棒状導体の遠心力が大きくても棒状導体を開口部から飛び出し難くしたものがある（例えば、特許文献１参照）。   As a rotor of a conventional induction motor, an axial opening groove (opening slit) is provided on an outer peripheral portion of a cylindrical iron core (rotor core), and an axial concave groove is formed on a side wall of the opening groove. A rod-shaped conductor (conductor bar) made of aluminum or the like press-fitted into the opening groove from the outer peripheral side opening is pressed and deformed from the outer peripheral side with a knurl to be engaged with the concave groove, and the rod-shaped conductor acting as the rotor rotates. Some have made it difficult for the rod-shaped conductor to jump out of the opening even if the centrifugal force is large (see, for example, Patent Document 1).

特開平２−２９４２５２号公報JP-A-2-294252

しかしながら、上記従来の技術によれば、回転子コアの外周方向に開口する開口スロット内に外周側開口部から圧入したアルミニウム等の導体バーを外周側からローレットで押圧、変形させて凹状溝と係合させているので、導体バーの変形ばらつきにより、長期間の使用に対する信頼性に欠けるという問題があった。また、アルミニウム等の導体バーを外周側から機械作業であるローレットで押圧、変形させるので、専用の設備、治具が必要となり、製作工数が多くコストアップになるという問題があった。   However, according to the above-described conventional technique, a conductor bar such as aluminum, which is press-fitted from the outer peripheral opening into the opening slot that opens in the outer peripheral direction of the rotor core, is pressed and deformed from the outer peripheral side with a knurl to be engaged with the concave groove. Therefore, there is a problem that the reliability of the conductor bar is not reliable due to the deformation variation of the conductor bar. In addition, since a conductor bar such as aluminum is pressed and deformed from the outer peripheral side by a knurling that is a mechanical work, there is a problem that dedicated equipment and jigs are required, and the number of manufacturing steps is increased and the cost is increased.

本発明は、上記に鑑みてなされたものであって、導体バーの遠心力に対する強度のばらつきが小さく、信頼性が高く、従来の設備が流用可能な低コストの誘導電動機の回転子及び誘導電動機の回転子の製造方法を得ることを目的とする。   The present invention has been made in view of the above, and the rotor and the induction motor of a low-cost induction motor in which the strength variation with respect to the centrifugal force of the conductor bar is small, the reliability is high, and the conventional equipment can be diverted. An object of the present invention is to obtain a manufacturing method of the rotor.

上述した課題を解決し、目的を達成するために、本発明の誘導電動機の回転子は、回転軸孔を有する円環状の電磁鋼板を複数積層して円筒状に形成され、外方壁部、内方壁部及び側方壁部を有する略矩形の複数のコアスロットが形成された回転子コアと、前記回転子コアの両軸端部に固定され、該回転子コアの複数のコアスロットに対応する複数の導体スロットが形成された導体リングと、前記コアスロット及び導体スロットに挿入され、遠心方向へ寄せられてほぼ全長に亘って前記コアスロットの外方壁部に当接した複数の導体バーと、を備え、前記導体スロットの内方壁部は軸方向に傾斜しており、前記導体バーは、前記傾斜により遠心方向へ寄せられていることを特徴とする。 In order to solve the above-described problems and achieve the object, the rotor of the induction motor of the present invention is formed in a cylindrical shape by laminating a plurality of annular electromagnetic steel plates each having a rotation shaft hole, an outer wall portion, A rotor core having a plurality of substantially rectangular core slots having an inner wall portion and a side wall portion, and fixed to both end portions of the rotor core, the rotor core being fixed to the plurality of core slots of the rotor core. A conductor ring in which a plurality of corresponding conductor slots are formed, and a plurality of conductors inserted into the core slot and the conductor slot and brought into a centrifugal direction so as to contact the outer wall portion of the core slot over almost the entire length And an inner wall portion of the conductor slot is inclined in the axial direction, and the conductor bar is moved in the centrifugal direction by the inclination .

この発明によれば、導体バーがコアスロットの外方壁部に当接しているので、回転子が高速回転しても、導体バーの遠心力による変形が抑制され、コアスロット内でたわんで破損することもなく、製品毎の強度のばらつきが小さく信頼性の高い誘導電動機の回転子が得られるという効果を奏する。   According to the present invention, since the conductor bar is in contact with the outer wall portion of the core slot, even if the rotor rotates at a high speed, deformation due to the centrifugal force of the conductor bar is suppressed, and the conductor bar is bent and damaged in the core slot. In addition, there is an effect that a highly reliable rotor of an induction motor having a small variation in strength between products can be obtained.

以下に、本発明にかかる誘導電動機の回転子及び誘導電動機の回転子の製造方法の実施の形態を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。   Embodiments of an induction motor rotor and a method of manufacturing an induction motor rotor according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

実施の形態１．
図１は、本発明の実施の形態１の誘導電動機の回転子を示す側面図であり、図２は、回転子の正面図であり、図３は、図１のＡ−Ａ線（又は、Ｂ−Ｂ線、Ｃ−Ｃ線）に沿う断面図であり、図４−１、図４−２及び図４−３は、図３のＤ部拡大図であって、それぞれＡ−Ａ線断面、Ｂ−Ｂ線断面及びＣ−Ｃ線断面を示す図であり、図５は、治具により導体バーを遠心方向へ寄せている状態を示す図であり、図６は、コアスロット内で導体バーが寄せられる様子を示す図であり、図７−１、図７−２及び図７−３は、それぞれＡ−Ａ線断面、Ｂ−Ｂ線断面及びＣ−Ｃ線断面において導体バーが寄せられた状態を示す図である。 Embodiment 1 FIG.
1 is a side view showing a rotor of an induction motor according to Embodiment 1 of the present invention, FIG. 2 is a front view of the rotor, and FIG. 3 is an AA line (or BB line, CC line), and FIGS. 4-1, 4-2, and 4-3 are enlarged views of a portion D in FIG. , BB line cross section and CC line cross section, FIG. 5 is a view showing a state where the conductor bar is moved in the centrifugal direction by the jig, FIG. 6 is a conductor in the core slot FIG. 7A, FIG. 7B, and FIG. 7C are diagrams showing a state in which the bar is moved, and in FIG. 7A, FIG. It is a figure which shows the state made.

図１〜図４−３に示すように、実施の形態１の誘導電動機の回転子１０は、中心部に回転軸孔１ｂを有する円環状の薄い電磁鋼板１ｄを複数積層して円筒状に形成された回転子コア１と、回転子コア１の両軸端部に固定された２つの導体リング２と、回転子コア１の複数のコアスロット１ａ及び導体リング２の複数の導体スロット２ａに挿入された複数の導体バー３と、を備えている。   As shown in FIGS. 1 to 4-3, the rotor 10 of the induction motor according to the first embodiment is formed in a cylindrical shape by laminating a plurality of annular thin electromagnetic steel plates 1d having a rotation shaft hole 1b in the center. Inserted into the rotor core 1, the two conductor rings 2 fixed to both axial ends of the rotor core 1, the plurality of core slots 1a of the rotor core 1, and the plurality of conductor slots 2a of the conductor ring 2. A plurality of conductor bars 3.

回転子コア１は、中心部に回転軸孔１ｂが形成され、図４−１〜図４−３に示すように、外方壁部１ｃ、内方壁部１ｈ及び側方壁部１ｉ、１ｊを有する略矩形の複数のコアスロット１ａが、放射状に、周方向に等間隔に、環状に配置された円環状の電磁鋼板（珪素鋼板等）１ｄを、芯金等を用いて内径基準で積層し、円筒状に形成されて製造される。   The rotor core 1 has a rotation shaft hole 1b formed at the center, and as shown in FIGS. 4-1 to 4-3, the outer wall 1c, the inner wall 1h, and the side walls 1i, 1j. A plurality of substantially rectangular core slots 1a having an annular shape are formed by laminating annular magnetic steel sheets (silicon steel sheets, etc.) 1d arranged radially and at equal intervals in the circumferential direction on the basis of the inner diameter using a core metal or the like And it is formed in a cylindrical shape and manufactured.

導体リング２は、図２に示すように、回転子コア１と内径及び外径が同一で、所定の厚さの円環状に形成され、回転子コア１の複数のコアスロット１ａに対応する位置に、コアスロット１ａと同一幅の、外方に開口する放射状の導体スロット２ａが形成されて製造される。   As shown in FIG. 2, the conductor ring 2 is formed in an annular shape having the same inner diameter and outer diameter as the rotor core 1 and having a predetermined thickness, and corresponds to a plurality of core slots 1 a of the rotor core 1. Further, a radial conductor slot 2a having the same width as the core slot 1a and opening outward is formed.

円筒状の回転子コア１の両軸端部に導体リング２を固定し、銅バー等の四角柱状の導体バー３を、コアスロット１ａ及び導体スロット２ａを貫通するように挿入する。導体バー３の挿入性を良くするため、コアスロット１ａの縦横寸法は、導体バー３の縦横寸法より大きくしてあり、また、それぞれの電磁鋼板１ｄは周方向に少しずれていることもあるので、コアスロット１ａと導体バー３の相対位置は、図４−１〜図４−３に示すように、図１のＡ−Ａ断面、Ｂ−Ｂ断面及びＣ−Ｃ断面で異なる場合がある。   The conductor ring 2 is fixed to both axial ends of the cylindrical rotor core 1, and a rectangular pillar-shaped conductor bar 3 such as a copper bar is inserted so as to penetrate the core slot 1a and the conductor slot 2a. In order to improve the insertion property of the conductor bar 3, the vertical and horizontal dimensions of the core slot 1a are made larger than the vertical and horizontal dimensions of the conductor bar 3, and the respective electromagnetic steel sheets 1d may be slightly shifted in the circumferential direction. As shown in FIGS. 4A to 4C, the relative positions of the core slot 1a and the conductor bar 3 may be different in the AA cross section, the BB cross section, and the CC cross section in FIG.

図４−１〜図４−３に示す形態では、導体バー３は、回転子コア１の一方の端部から他方の端部に向かって、コアスロット１ａの外方左寄りの位置から内方右寄りの位置へ斜めに挿入されている。図４−２及び図４−３に示すように、導体バー３の外側とコアスロット１ａの外方壁部１ｃとの間に隙間がある状態で、導体バー３と導体リング２とをロウ付け等で接合固定し、回転子１０を高速回転させると、遠心力により、導体バー３が隙間分撓み、撓み変形により、ロウ付け接合部付け根で破断される。   In the form shown in FIGS. 4-1 to 4-3, the conductor bar 3 is located from the one end of the rotor core 1 toward the other end toward the inner right from the position on the outer left side of the core slot 1a. It is inserted diagonally to the position of. As shown in FIGS. 4-2 and 4-3, the conductor bar 3 and the conductor ring 2 are brazed with a gap between the outside of the conductor bar 3 and the outer wall portion 1c of the core slot 1a. When the rotor 10 is rotated at a high speed by, for example, the conductor bar 3 being bent by the gap by the centrifugal force, the conductor bar 3 is broken at the base of the brazed joint by the bending deformation.

実施の形態１の回転子１０では、導体バー３と導体リング２とをロウ付け等で固定する前に、図５に示すように、円錐台状に形成された２つの導体バー拡径治具４の円錐面を導体バー３の内側端に当接させ、軸方向に押圧することにより、図６に示すように、導体バー３を遠心方向へ寄せ、図７−１〜図７−３に示すように、回転子コア１のほぼ全長に亘ってコアスロット１ａの外方壁部１ｃに導体バー３の外側を当接させる。   In the rotor 10 of the first embodiment, before the conductor bar 3 and the conductor ring 2 are fixed by brazing or the like, as shown in FIG. 5, two conductor bar diameter increasing jigs formed in a truncated cone shape are used. 4 is brought into contact with the inner end of the conductor bar 3 and pressed in the axial direction so that the conductor bar 3 is moved in the centrifugal direction as shown in FIG. As shown, the outer side of the conductor bar 3 is brought into contact with the outer wall portion 1c of the core slot 1a over substantially the entire length of the rotor core 1.

その後、図示しないコア押さえで導体リング２及び回転子コア１を軸方向に加圧した状態で導体リング２と導体バー３とをロウ付け等で接合固定する。また、導体リング２から突出した導体バー３の端部を削り落とすとともに、回転子１０の軸端部と外周部とを切削加工して精密な円筒状の回転子１０を製造する。   Thereafter, the conductor ring 2 and the conductor bar 3 are joined and fixed by brazing or the like while the conductor ring 2 and the rotor core 1 are pressed in the axial direction with a core presser (not shown). Further, the end portion of the conductor bar 3 protruding from the conductor ring 2 is scraped off, and the axial end portion and the outer peripheral portion of the rotor 10 are cut to manufacture a precise cylindrical rotor 10.

実施の形態１の誘導電動機の回転子１０及び誘導電動機の回転子１０の製造方法によれば、導体バー３が、ほぼ全長に亘ってコアスロット１ａの外方壁部１ｃに当接しているので、回転子１０が高速回転しても、導体バー３の遠心力による変形が抑制され、コアスロット１ａ内でたわんで破損することもなく、製品毎の強度のばらつきが小さく信頼性の高い誘導電動機の回転子１０及び誘導電動機の回転子１０の製造方法が得られる。   According to the induction motor rotor 10 and the method of manufacturing the induction motor rotor 10 of the first embodiment, the conductor bar 3 is in contact with the outer wall 1c of the core slot 1a over substantially the entire length. Even when the rotor 10 rotates at a high speed, the deformation due to the centrifugal force of the conductor bar 3 is suppressed, and there is no bending and breakage in the core slot 1a. Manufacturing method of the rotor 10 and the rotor 10 of the induction motor are obtained.

実施の形態２．
図８は、本発明の実施の形態２の回転子の導体リングを示す正面図であり、図９は、図８のＥ−Ｅ線に沿う断面図であり、図１０は、コアスロットに導体バーを挿入した後に実施の形態２の導体リングを組付けている状態を示す側面図である。図８〜図１０に示すもので図１〜図７−３に示すものと同一又は同等のものには同一の符号を付して詳細な説明を省略する。 Embodiment 2. FIG.
8 is a front view showing the conductor ring of the rotor according to the second embodiment of the present invention, FIG. 9 is a cross-sectional view taken along the line EE of FIG. 8, and FIG. 10 shows a conductor in the core slot. It is a side view which shows the state which has assembled | attached the conductor ring of Embodiment 2 after inserting a bar | burr. 8 to 10 that are the same as or equivalent to those shown in FIGS. 1 to 7-3 are given the same reference numerals, and detailed descriptions thereof are omitted.

図８及び図９に示すように、実施の形態２の導体リング２は、導体スロット２ａの内方壁部２ｂを、回転子１０の軸方向に傾斜させている。図９に示す内方壁部２ｂの最大外径Ｄ2は、図１０に示すように、導体バー３がコアスロット１ａの外方壁部１ｃに当接したときの、導体バー３の内側同士の内径Ｄ1とほぼ同一寸法としている。 As shown in FIGS. 8 and 9, in the conductor ring 2 of the second embodiment, the inner wall portion 2 b of the conductor slot 2 a is inclined in the axial direction of the rotor 10. The maximum outer diameter D 2 of the inner wall portion 2b shown in FIG. 9, as shown in FIG. 10, when the conductor bars 3 comes into contact with the outer wall 1c of the core slot 1a, the inner ends of the conductor bars 3 The inner diameter D 1 is approximately the same size.

実施の形態２の回転子１０を組立てるときには、導体リング２を回転子コア１に組付ける前に、導体バー３を回転子コア１のコアスロット１ａに挿入する。次に、導体リング２の導体スロット２ａの内方壁部２ｂの小径側を回転子コア１の軸端部に向け、導体リング２を軸端部に近づけ、導体バー３の先端部を導体スロット２ａに挿入する。   When the rotor 10 according to the second embodiment is assembled, the conductor bar 3 is inserted into the core slot 1 a of the rotor core 1 before the conductor ring 2 is assembled to the rotor core 1. Next, the smaller diameter side of the inner wall 2b of the conductor slot 2a of the conductor ring 2 is directed toward the shaft end of the rotor core 1, the conductor ring 2 is brought closer to the shaft end, and the tip of the conductor bar 3 is moved to the conductor slot. Insert in 2a.

図示しないコア押さえで導体リング２を回転子コア１方向へ押圧し、導体リング２を回転子コア１の軸端部に近づけるに従って、導体スロット２ａの傾斜した内方壁部２ｂの楔作用により、導体バー３が遠心方向へ寄せられ、導体バー３の先端部が内方壁部２ｂの最大外径部を通過すると、導体バー３の外側がコアスロット１ａの外方壁部１ｃに当接する。   As the conductor ring 2 is pressed toward the rotor core 1 with a core presser (not shown) and the conductor ring 2 is brought closer to the axial end of the rotor core 1, the wedge action of the inclined inner wall 2b of the conductor slot 2a When the conductor bar 3 is moved in the centrifugal direction and the tip end portion of the conductor bar 3 passes the maximum outer diameter portion of the inner wall portion 2b, the outer side of the conductor bar 3 comes into contact with the outer wall portion 1c of the core slot 1a.

そのまま、導体リング２を押圧して回転子コア１の軸端部に当接させ、その後、導体リング２及び回転子コア１を軸方向に加圧した状態で導体リング２と導体バー３とをロウ付け等で接合固定する。また、導体リング２から突出した導体バー３の端部を削り落とすとともに、回転子１０の軸端部と外周部とを切削加工して精密な円筒状の回転子１０を製作する。   As it is, the conductor ring 2 is pressed and brought into contact with the shaft end portion of the rotor core 1, and then the conductor ring 2 and the conductor bar 3 are brought into contact with the conductor ring 2 and the rotor core 1 in the axial direction. Join and fix by brazing. Further, the end portion of the conductor bar 3 protruding from the conductor ring 2 is scraped off, and the shaft end portion and the outer peripheral portion of the rotor 10 are cut to manufacture a precise cylindrical rotor 10.

実施の形態２の誘導電動機の回転子１０及び誘導電動機の回転子１０の製造方法によれば、導体バー３が、ほぼ全長に亘ってコアスロット１ａの外方壁部１ｃに当接しているので、回転子１０が高速回転しても、導体バー３の遠心力による変形が抑制され、コアスロット１ａ内でたわんで破損することもなく、製品毎の強度のばらつきが小さく信頼性の高い誘導電動機の回転子１０及び誘導電動機の回転子１０の製造方法が得られる。また、導体バー拡径治具４のような特殊な治具を用いずに回転子１０を組立てることができる。   According to the induction motor rotor 10 and the method of manufacturing the induction motor rotor 10 of the second embodiment, the conductor bar 3 is in contact with the outer wall 1c of the core slot 1a over substantially the entire length. Even when the rotor 10 rotates at a high speed, the deformation due to the centrifugal force of the conductor bar 3 is suppressed, and there is no bending and breakage in the core slot 1a. Manufacturing method of the rotor 10 and the rotor 10 of the induction motor are obtained. Further, the rotor 10 can be assembled without using a special jig such as the conductor bar diameter increasing jig 4.

実施の形態３．
図１１は、本発明の実施の形態３の回転子を示す側面図であり、図１２は、図１１のＦ−Ｆ線に沿う断面図であり、図１３は、図１２のＧ部拡大図であり、図１４は、実施の形態３の回転子の変形例を示す図１２のＧ部拡大図である。図１１〜図１４に示すもので図１〜図７−３に示すものと同一又は同等のものには同一の符号を付して詳細な説明を省略する。 Embodiment 3 FIG.
11 is a side view showing the rotor according to the third embodiment of the present invention, FIG. 12 is a cross-sectional view taken along the line FF of FIG. 11, and FIG. 13 is an enlarged view of a portion G of FIG. FIG. 14 is an enlarged view of part G in FIG. 12 showing a modification of the rotor of the third embodiment. 11 to FIG. 14 that are the same as or equivalent to those shown in FIG. 1 to FIG.

図１１〜図１３に示すように、実施の形態３の回転子コア１のコアスロット１ａは、略矩形に形成され、外方壁部１ｃ、内方壁部１ｈ及び側方壁部１ｉ、１ｊを有し、内方壁部１ｈに先端が尖った突起部１ｆが設けられている。突起部１ｆは複数設けてもよい。突起部１ｆの先端と外方壁部１ｃとの距離は、導体バー３の高さと同じか、少し小さくしてある。   As shown in FIGS. 11 to 13, the core slot 1a of the rotor core 1 according to the third embodiment is formed in a substantially rectangular shape, and includes an outer wall portion 1c, an inner wall portion 1h, and side wall portions 1i, 1j. The inner wall 1h is provided with a protrusion 1f having a sharp tip. A plurality of protrusions 1f may be provided. The distance between the tip of the projection 1f and the outer wall 1c is the same as or slightly smaller than the height of the conductor bar 3.

回転子コア１の両軸端部に導体リング２を固定し、導体バー３を、コアスロット１ａ及び導体スロット２ａを貫通するように挿入すると、導体バー３は、突起部１ｆにより遠心方向へ寄せられてコアスロット１ａの外方壁部１ｃに当接した状態でコアスロット１ａ及び導体スロット２ａに挿入される。   When the conductor ring 2 is fixed to both axial ends of the rotor core 1 and the conductor bar 3 is inserted so as to penetrate the core slot 1a and the conductor slot 2a, the conductor bar 3 is moved in the centrifugal direction by the protrusion 1f. And inserted into the core slot 1a and the conductor slot 2a in contact with the outer wall portion 1c of the core slot 1a.

突起部１ｆの先端と外方壁部１ｃとの距離が、導体バー３の高さより少し小さいときは、突起部１ｄの先端が少し導体バー３に喰い込んだ状態で、導体バー３がコアスロット１ａ内を摺動するが、突起部１ｄの先端が尖っているので、摺動抵抗はそれほど大きくならない。   When the distance between the tip of the protrusion 1f and the outer wall 1c is slightly smaller than the height of the conductor bar 3, the conductor bar 3 is positioned in the core slot with the tip of the protrusion 1d slightly biting into the conductor bar 3. Although sliding inside 1a, since the tip of the projection 1d is sharp, the sliding resistance is not so high.

図１４に示す変形例のように、回転子コア１のコアスロット１ａを、外方壁部１ｃ、内方壁部１ｈ及び側方壁部１ｉ、１ｊを有する略矩形に形成し、内方壁部１ｈに先端が尖った複数（２つ）の突起部１ｆを設け、一方の側方壁部１ｉに先端が尖った複数（２つ）の突起部１ｅを設けるようにしてもよい。突起部１ｆの先端と外方壁部１ｃとの距離は、導体バー３の高さと同じか少し小さくし、突起部１ｅの先端と他方の側方壁部１ｊとの距離は、導体バー３の幅と同じか少し小さくする。   As in the modification shown in FIG. 14, the core slot 1a of the rotor core 1 is formed in a substantially rectangular shape having an outer wall portion 1c, an inner wall portion 1h, and side wall portions 1i, 1j, and the inner wall A plurality (two) of protrusions 1f with sharp tips may be provided on the portion 1h, and a plurality (two) of protrusions 1e with sharp tips may be provided on one side wall portion 1i. The distance between the tip of the protrusion 1f and the outer wall 1c is the same as or slightly smaller than the height of the conductor bar 3, and the distance between the tip of the protrusion 1e and the other side wall 1j is the same as that of the conductor bar 3. Make it the same or slightly smaller than the width.

回転子コア１の両軸端部に導体リング２を固定し、導体バー３を、コアスロット１ａ及び導体スロット２ａを貫通するように挿入すると、導体バー３は、突起部１ｆにより遠心方向へ寄せられてコアスロット１ａの外方壁部１ｃに当接し、かつ、突起部１ｅにより他方の側方壁部１ｊに当接した状態でコアスロット１ａ及び導体スロット２ａに挿入される。全ての導体バー３が、外方壁部１ｃ及び他方の側方壁部１ｊに当接するので、全てのコアスロット１ａと導体バー３の相対位置が均一となり、回転子１０の重心位置を回転軸心に完全に一致させることができる。   When the conductor ring 2 is fixed to both axial ends of the rotor core 1 and the conductor bar 3 is inserted so as to penetrate the core slot 1a and the conductor slot 2a, the conductor bar 3 is moved in the centrifugal direction by the protrusion 1f. Then, it is inserted into the core slot 1a and the conductor slot 2a in contact with the outer wall portion 1c of the core slot 1a and in contact with the other side wall portion 1j by the projection 1e. Since all the conductor bars 3 are in contact with the outer wall portion 1c and the other side wall portion 1j, the relative positions of all the core slots 1a and the conductor bars 3 are uniform, and the center of gravity position of the rotor 10 is the rotational axis. Can be perfectly matched to the heart.

実施の形態３の誘導電動機の回転子１０及び誘導電動機の回転子１０の製造方法によれば、導体バー３が、ほぼ全長に亘ってコアスロット１ａの外方壁部１ｃに当接しているので、回転子１０が高速回転しても、導体バー３の遠心力による変形が抑制され、コアスロット１ａ内でたわんで破損することもなく、製品毎の強度のばらつきが小さく信頼性の高い誘導電動機の回転子１０及び誘導電動機の回転子１０の製造方法が得られる。また、導体バー拡径治具４のような特殊な治具を用いずに回転子１０を組立てることができる。   According to the induction motor rotor 10 and the method of manufacturing the induction motor rotor 10 of the third embodiment, the conductor bar 3 is in contact with the outer wall 1c of the core slot 1a over substantially the entire length. Even when the rotor 10 rotates at a high speed, the deformation due to the centrifugal force of the conductor bar 3 is suppressed, and there is no bending and breakage in the core slot 1a. Manufacturing method of the rotor 10 and the rotor 10 of the induction motor are obtained. Further, the rotor 10 can be assembled without using a special jig such as the conductor bar diameter increasing jig 4.

なお、以上説明した実施の形態１〜３の回転子コア１のコアスロット１ａは、外方壁部１ｃが閉じたクローズドスロットとしたが、コアスロット１ａは、外方壁部１ｃの中央部が開口したオープンスロットとしてもよい。   The core slot 1a of the rotor core 1 of the first to third embodiments described above is a closed slot with the outer wall portion 1c closed, but the core slot 1a has a central portion of the outer wall portion 1c. An open slot may be used.

以上のように、本発明にかかる回転子及び回転子の製造方法は、信頼性が高く、誘導電動機及び誘導電動機の製造方法として有用である。   As described above, the rotor and the method for manufacturing the rotor according to the present invention are highly reliable and useful as an induction motor and a method for manufacturing the induction motor.

本発明の実施の形態１の誘導電動機の回転子を示す側面図である。It is a side view which shows the rotor of the induction motor of Embodiment 1 of this invention. 回転子の正面図である。It is a front view of a rotor. 図１のＡ−Ａ線に沿う断面図である。It is sectional drawing which follows the AA line of FIG. 図３のＤ部拡大図であって、Ａ−Ａ線断面図である。It is the D section enlarged view of Drawing 3, and is an AA line sectional view. 図３のＤ部拡大図であって、Ｂ−Ｂ線断面図である。It is the D section enlarged view of Drawing 3, and is a BB line sectional view. 図３のＤ部拡大図であって、Ｃ−Ｃ線断面図である。It is the D section enlarged view of Drawing 3, and is a CC sectional view. 治具により導体バーを遠心方向へ寄せている状態を示す図である。It is a figure which shows the state which has put the conductor bar in the centrifugal direction with the jig | tool. コアスロット内で導体バーが寄せられる様子を示す図である。It is a figure which shows a mode that a conductor bar is brought close within a core slot. 図４−１のＡ−Ａ線断面において導体バーが寄せられた状態を示す図である。It is a figure which shows the state in which the conductor bar was brought near in the AA line cross section of FIGS. 図４−２のＢ−Ｂ線断面において導体バーが寄せられた状態を示す図である。It is a figure which shows the state by which the conductor bar was brought near in the BB line cross section of FIG. 図４−３のＣ−Ｃ線断面において導体バーが寄せられた状態を示す図である。It is a figure which shows the state by which the conductor bar was brought near in CC section of FIG. 4-3. 本発明の実施の形態２の回転子の導体リングを示す正面図である。It is a front view which shows the conductor ring of the rotor of Embodiment 2 of this invention. 図８のＥ−Ｅ線に沿う断面図である。It is sectional drawing which follows the EE line | wire of FIG. コアスロットに導体バーを挿入した後に実施の形態２の導体リングを組付けている状態を示す側面図である。It is a side view which shows the state which has assembled | attached the conductor ring of Embodiment 2 after inserting a conductor bar in a core slot. 本発明の実施の形態３の回転子を示す側面図である。It is a side view which shows the rotor of Embodiment 3 of this invention. 図１１のＦ−Ｆ線に沿う断面図である。It is sectional drawing which follows the FF line of FIG. 図１２のＧ部拡大図である。It is the G section enlarged view of FIG. 実施の形態３の回転子の変形例を示す図１２のＧ部拡大図である。FIG. 13 is an enlarged view of part G in FIG. 12 showing a modification of the rotor according to the third embodiment.

符号の説明Explanation of symbols

１ 回転子コア
１ａ コアスロット
１ｃ 外方壁部
１ｈ 内方壁部
１ｉ，１ｊ 側方壁部
１ｅ，１ｆ 突起部
１ｂ 回転軸孔
１ｄ 電磁鋼板
２ 導体リング
２ａ 導体スロット
２ｂ 内方壁部
３ 導体バー
４ 導体バー拡径治具
１０ 回転子 DESCRIPTION OF SYMBOLS 1 Rotor core 1a Core slot 1c Outer wall part 1h Inner wall part 1i, 1j Side wall part 1e, 1f Protrusion part 1b Rotating shaft hole 1d Electrical steel plate 2 Conductor ring 2a Conductor slot 2b Inner wall part 3 Conductor bar 4 Conductor bar diameter expansion jig 10 Rotor

Claims (3)

回転軸孔を有する円環状の電磁鋼板を複数積層して円筒状に形成され、外方壁部、内方壁部及び側方壁部を有する略矩形の複数のコアスロットが形成された回転子コアと、
前記回転子コアの両軸端部に固定され、該回転子コアの複数のコアスロットに対応する複数の導体スロットが形成された導体リングと、
前記コアスロット及び導体スロットに挿入され、遠心方向へ寄せられてほぼ全長に亘って前記コアスロットの外方壁部に当接した複数の導体バーと、
を備え、
前記導体スロットの内方壁部は軸方向に傾斜しており、前記導体バーは、前記傾斜により遠心方向へ寄せられていることを特徴とする誘導電動機の回転子。 A rotor in which a plurality of annular electromagnetic steel plates each having a rotation shaft hole are laminated to form a cylindrical shape, and a plurality of substantially rectangular core slots having an outer wall portion, an inner wall portion, and a side wall portion are formed. The core,
A conductor ring fixed to both end portions of the rotor core and formed with a plurality of conductor slots corresponding to the plurality of core slots of the rotor core;
A plurality of conductor bars that are inserted into the core slot and the conductor slot, and are brought into contact with the outer wall portion of the core slot over the entire length by being moved in the centrifugal direction;
Equipped with a,
The induction motor rotor according to claim 1, wherein an inner wall portion of the conductor slot is inclined in an axial direction, and the conductor bar is moved in a centrifugal direction by the inclination . 回転軸孔を有する円環状の電磁鋼板を複数積層して円筒状に形成され、外方壁部、内方壁部及び側方壁部を有する略矩形の複数のコアスロットが形成された回転子コアを製造する工程と、
前記回転子コアの両軸端部に固定され、該回転子コアの複数のコアスロットに対応する複数の導体スロットが形成された導体リングを製造する工程と、
前記コアスロット及び導体スロットに挿入される複数の導体バーを製造する工程と、
前記複数の導体バーを前記コアスロット及び導体スロットに挿入する工程と、
を備える誘導電動機の回転子の製造方法において、
前記複数の導体バーを遠心方向へ寄せ、ほぼ全長に亘って前記コアスロットの外方壁部に当接させる工程をさらに備え、
前記導体バーを遠心方向へ寄せる工程は、導体バー拡径治具により遠心方向へ寄せる工程であることを特徴とする誘導電動機の回転子の製造方法。 A rotor in which a plurality of annular electromagnetic steel plates each having a rotation shaft hole are laminated to form a cylindrical shape, and a plurality of substantially rectangular core slots having an outer wall portion, an inner wall portion, and a side wall portion are formed. Manufacturing the core;
Producing a conductor ring fixed to both end portions of the rotor core and having a plurality of conductor slots corresponding to the plurality of core slots of the rotor core;
Producing a plurality of conductor bars to be inserted into the core slot and the conductor slot;
Inserting the plurality of conductor bars into the core slot and the conductor slot;
In the manufacturing method of the rotor of the induction motor comprising:
Further comprising the step of bringing the plurality of conductor bars in the centrifugal direction and contacting the outer wall of the core slot over substantially the entire length ,
The method of manufacturing a rotor for an induction motor, wherein the step of moving the conductor bar in the centrifugal direction is a step of moving the conductor bar in the centrifugal direction with a conductor bar diameter increasing jig . 回転軸孔を有する円環状の電磁鋼板を複数積層して円筒状に形成され、外方壁部、内方壁部及び側方壁部を有する略矩形の複数のコアスロットが形成された回転子コアを製造する工程と、
前記回転子コアの両軸端部に固定され、該回転子コアの複数のコアスロットに対応する複数の導体スロットが形成された導体リングを製造する工程と、
前記コアスロット及び導体スロットに挿入される複数の導体バーを製造する工程と、
前記複数の導体バーを前記コアスロット及び導体スロットに挿入する工程と、
を備える誘導電動機の回転子の製造方法において、
前記複数の導体バーを遠心方向へ寄せ、ほぼ全長に亘って前記コアスロットの外方壁部に当接させる工程をさらに備え、
前記導体バーを遠心方向へ寄せる工程は、軸方向に傾斜した前記導体スロットの内方壁部により遠心方向へ寄せる工程であることを特徴とする誘導電動機の回転子の製造方法。 A rotor in which a plurality of annular electromagnetic steel plates each having a rotation shaft hole are laminated to form a cylindrical shape, and a plurality of substantially rectangular core slots having an outer wall portion, an inner wall portion, and a side wall portion are formed. Manufacturing the core;
Producing a conductor ring fixed to both end portions of the rotor core and having a plurality of conductor slots corresponding to the plurality of core slots of the rotor core;
Producing a plurality of conductor bars to be inserted into the core slot and the conductor slot;
Inserting the plurality of conductor bars into the core slot and the conductor slot;
In the manufacturing method of the rotor of the induction motor comprising:
Further comprising the step of bringing the plurality of conductor bars in the centrifugal direction and contacting the outer wall of the core slot over substantially the entire length,
Wherein the step of the conductor bars gather the centrifugal direction, induction motor rotor manufacturing method of you, characterized in that a step of the inner wall portion of the conductor slots which are inclined axially lapping the centrifugal direction.
JP2006122475A 2006-04-26 2006-04-26 Induction motor rotor and method of manufacturing induction motor rotor Expired - Fee Related JP4937632B2 (en)

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