JPH08186946A - Rotor of motor and manufacture thereof - Google Patents
Rotor of motor and manufacture thereofInfo
- Publication number
- JPH08186946A JPH08186946A JP33748894A JP33748894A JPH08186946A JP H08186946 A JPH08186946 A JP H08186946A JP 33748894 A JP33748894 A JP 33748894A JP 33748894 A JP33748894 A JP 33748894A JP H08186946 A JPH08186946 A JP H08186946A
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- conductor
- press
- sintered body
- electric 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000004020 conductor Substances 0.000 claims abstract description 73
- 239000000463 material Substances 0.000 claims abstract description 24
- 230000001050 lubricating effect Effects 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000003780 insertion Methods 0.000 claims description 9
- 230000037431 insertion Effects 0.000 claims description 9
- 239000003082 abrasive agent Substances 0.000 abstract 1
- 239000011800 void material Substances 0.000 abstract 1
- 239000010949 copper Substances 0.000 description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 229910000976 Electrical steel Inorganic materials 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910002480 Cu-O Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229910009203 Y-Ba-Cu-O Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
Landscapes
- Induction Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、回転子鉄心と回転子導
体とから構成される電動機の回転子およびその製造方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor of an electric motor composed of a rotor core and a rotor conductor, and a method of manufacturing the rotor.
【０００２】[0002]
【従来の技術】上記構成の回転子を具備する電動機は、
従来より、液封型キャンド式電動機やルーツ型キャンド
式電動機として使用されている。たとえば液封型キャン
ド式電動機においては、フレーム内に珪素鋼板を積層し
てなる固定子鉄心が配設され、該固定子鉄心には固定子
コイルが装着されるとともに、その中心部には前記回転
子が固定子鉄心と微小隙間を配して主軸に貫通配設され
る。2. Description of the Related Art An electric motor equipped with a rotor having the above structure is
Conventionally, it has been used as a liquid ring type canned electric motor or a roots type canned electric motor. For example, in a liquid-sealed canned electric motor, a stator core formed by laminating silicon steel plates is arranged in a frame, a stator coil is attached to the stator core, and the rotating core is provided at the center thereof. The child is disposed so as to penetrate the main shaft with a small clearance from the stator core.
【０００３】電動機の回転子は、珪素鋼板を積層してな
る回転子鉄心１と、回転子導体２とから構成される（図
３および図４参照）。回転子鉄心１の中心には主軸を嵌
装するための主軸挿入孔３が形成されるとともに、回転
子導体２を挿入するための溝４を有する。溝４は主軸挿
入孔３のまわりに多数形成されている。溝４に挿入され
る回転子導体２は、回転子鉄心１を軸方向に貫通し、回
転子鉄心１の両端に固着される回転子導体（エンドリン
グ）５と接触している。A rotor of an electric motor is composed of a rotor core 1 formed by laminating silicon steel plates and a rotor conductor 2 (see FIGS. 3 and 4). A spindle insertion hole 3 for inserting a spindle is formed in the center of the rotor core 1, and a groove 4 for inserting the rotor conductor 2 is provided. A large number of grooves 4 are formed around the spindle insertion hole 3. The rotor conductor 2 inserted in the groove 4 penetrates the rotor core 1 in the axial direction and is in contact with the rotor conductors (end rings) 5 fixed to both ends of the rotor core 1.
【０００４】[0004]
【発明が解決しようとする課題】このような電動機の回
転子導体は、一般に、アルミニウム（Ａｌ）の鋳造また
はダイキャストにより製造されているが、製造工程中に
おいて導体内へのガスの巻き込みや凝固収縮によるいわ
ゆる引け巣等の欠陥の発生を避けることができず、Ａｌ
の電気的特性を低下させ、ひいては電動機の電気的特性
を低下させる原因となっていた。The rotor conductor of such an electric motor is generally manufactured by casting or die casting of aluminum (Al). During the manufacturing process, gas entrainment and solidification in the conductor are caused. Occurrence of defects such as shrinkage cavities due to shrinkage cannot be avoided, and Al
Of the electric motor, which in turn causes the electric characteristics of the electric motor to deteriorate.
【０００５】これを解決するために、Ａｌ溶湯を凝固過
程で加圧することも一部においてなされてはいるが、二
段加圧機構等が必要となるため製造設備が複雑となる。In order to solve this, some of the pressurization of the molten Al is performed in the solidification process, but a two-stage pressurizing mechanism or the like is required, which complicates the manufacturing equipment.
【０００６】また、回転子導体の材料として電気的特性
に優れた銅（Ｃｕ）を機械加工して用いることも行われ
ているが、導体挿入溝には回転子鉄心を構成する珪素鋼
板のエッジ状端部が露出しており、これが圧入抵抗とな
るため、該導体挿入溝内へのＣｕバーの打ち込み作業に
手間を要する。かつ、回転子溝とＣｕバーとの間に若干
の隙間が残ることが避けられないため、強度が劣り、運
転中の振動による騒音や破損が生ずることがある。さら
に、両端のエンドリングとＣｕバーとを短絡させるため
の溶接および該溶接後の後処理が必要となることもあっ
て、価格的に高価なものとならざるを得ないという問題
があった。Although copper (Cu), which has excellent electrical characteristics, is also machined and used as a material for the rotor conductor, the conductor insertion groove has an edge of a silicon steel plate forming the rotor core. The end portion of the groove is exposed, and this becomes a press-fitting resistance, so that it takes time and effort to drive the Cu bar into the conductor insertion groove. In addition, since it is inevitable that a slight gap is left between the rotor groove and the Cu bar, the strength is inferior, and noise or damage may occur due to vibration during operation. Further, there is a problem in that the welding for short-circuiting the end rings on both ends and the Cu bar and the post-treatment after the welding are required, which makes the price expensive.
【０００７】[0007]
【課題を解決するための手段】従って、本発明は、上記
従来技術の問題点を解消し、電気的特性および強度特性
に優れた電動機の回転子を簡単な方法で製造することを
目的とする。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above problems of the prior art and to manufacture a rotor of an electric motor excellent in electrical characteristics and strength characteristics by a simple method. .
【０００８】すなわち、本発明は、主軸挿入孔と導体キ
ャビティ部とを有する回転子鉄心と、前記回転子鉄心の
前記導体キャビティ部に挿入される回転子導体とを備え
て構成される電動機の回転子において、前記回転子導体
が焼結体よりなることを特徴とする。That is, according to the present invention, the rotation of an electric motor comprising a rotor core having a spindle insertion hole and a conductor cavity, and a rotor conductor inserted into the conductor cavity of the rotor core. In the child, the rotor conductor is made of a sintered body.
【０００９】また、本発明による電動機の回転子は、上
記と同様の構成を有する回転子の前記回転子導体におい
て、外表面から軸中心に向かって導体材料の密度が連続
して高密度化していることを特徴とする。Further, in the rotor of the electric motor according to the present invention, in the rotor conductor of the rotor having the same structure as described above, the density of the conductor material is continuously increased from the outer surface toward the axis center. It is characterized by being
【００１０】さらに、本発明による電動機の回転子の製
造方法は、回転子鉄心の導体キャビティ部に、導電性の
優れた材料の焼結体よりなり、かつ、前記導体キャビテ
ィ部の内部容積より大きな体積を有する焼結体バーを圧
入することを特徴とする。Further, in the method of manufacturing a rotor of an electric motor according to the present invention, the conductor cavity of the rotor core is made of a sintered body of a material having excellent conductivity, and is larger than the internal volume of the conductor cavity. It is characterized in that a sintered body bar having a volume is press-fitted.
【００１１】この製造方法の実施においては、前記焼結
体バーの圧入に先立って、前記導体キャビティ部の内壁
面に低摩耗性材料による潤滑膜を形成することが、圧入
をスムーズに行う上で好適である。In carrying out this manufacturing method, it is necessary to form a lubricating film of a low-wear material on the inner wall surface of the conductor cavity portion prior to press-fitting the sintered body bar in order to facilitate press-fitting. It is suitable.
【００１２】また、前記焼結体バーの前記導体キャビテ
ィ部に対する圧入代を、前記回転子の外表面側端部にお
ける圧入代ゼロから軸中心側端部においては前記焼結体
バーの焼結体空隙率と同等体積の圧入代となるように連
続的に変化させることが好適である。このように圧入代
を変化させることにより、回転子の外表面から軸中心に
向かって導体材料の密度が連続的に高密度化された回転
子導体が得られる。Further, the press-fitting margin of the sintered body bar into the conductor cavity portion is zero from the press-fitting margin of zero at the outer surface side end of the rotor to the sintered body of the sintered body bar at the shaft center side end. It is preferable to continuously change the press-fitting margin to have a volume equivalent to the porosity. By changing the press-fitting margin in this way, a rotor conductor in which the density of the conductor material is continuously increased from the outer surface of the rotor toward the axial center can be obtained.
【００１３】前記回転子導体の材料としては、純銅、銅
合金、純銀、銀合金またはこれらの混合体、あるいはこ
れらにさらに鉄やステンレス等の第三成分を混合したも
のの焼結体が用いられる。このように回転子導体材料に
焼結体を利用したことにより、さまざまな材料の組み合
わせを自由が選択できることとなり、目的に応じて導電
率、電気抵抗、配向、強度等の特性を選択的に与えるこ
とが可能となる。As the material for the rotor conductor, pure copper, copper alloy, pure silver, silver alloy, or a mixture thereof, or a sintered body of a mixture of these with a third component such as iron or stainless is used. By using a sintered body as the rotor conductor material in this way, it is possible to freely select various combinations of materials, and selectively give properties such as conductivity, electric resistance, orientation, and strength according to the purpose. It becomes possible.
【００１４】たとえば、純銅の電気的特性に加えて機械
的特性の改善要求に答えるべく、Ｃｕ−０．２５Ｚｒ、
Ｃｕ−０．１３Ｚｒ−０．７Ｃｒ、Ｃｕ−０．８Ｃｒ等
の焼結体を用いることができる。For example, in order to meet the demand for improvement of mechanical properties in addition to the electrical properties of pure copper, Cu-0.25Zr,
Sintered bodies such as Cu-0.13Zr-0.7Cr and Cu-0.8Cr can be used.
【００１５】また、電気的特性をより向上させるため
に、超伝導材料を使用することができる。超伝導材料は
合金を形成することがないため、回転子導体を焼結体で
構成することによって超伝導材料の使用が可能となる。
回転子導体を構成する超伝導材料としては、たとえばＢ
ｉ−Ｓｒ−Ｃａ−Ｃｕ−Ｏ、Ｙ−Ｂａ−Ｃｕ−Ｏ等が好
適に用いられる。Further, a superconducting material can be used in order to further improve the electrical characteristics. Since the superconducting material does not form an alloy, the superconducting material can be used by forming the rotor conductor with a sintered body.
As the superconducting material forming the rotor conductor, for example, B
i-Sr-Ca-Cu-O, Y-Ba-Cu-O and the like are preferably used.
【００１６】[0016]
【作用】回転子導体材料がポーラスな焼結体で形成さ
れ、導体キャビティ部の内壁面には低摩耗性材料による
潤滑膜が形成されているため、純銅等の焼結体バーの圧
入が容易であり、しかも強固に一体化された回転子導体
が得られる。焼結体バーの導体キャビティ部に対する圧
入代を回転子の外表面から軸中心に向けて変えることに
より、回転子表面から軸中心に向かって導体材料の密度
が連続的に高密度化された回転子導体が得られる。[Function] Since the rotor conductor material is made of a porous sintered body and the lubricating film made of a low wear material is formed on the inner wall surface of the conductor cavity, it is easy to press-in a sintered body bar of pure copper or the like. In addition, a rotor conductor that is firmly integrated can be obtained. Rotation in which the density of the conductor material is continuously increased from the rotor surface toward the shaft center by changing the press-fitting margin of the sintered body bar into the conductor cavity from the outer surface of the rotor toward the shaft center. A child conductor is obtained.
【００１７】[0017]
【実施例】本発明の実施例について以下図１ないし図３
を参照しながら説明する。なお、本実施例で製造される
電動機回転子の全体構成は、図３および図４に示される
従来技術によるものと同様であるので、図１および図２
において、共通する部分には同一の符号が付されてい
る。Embodiments of the present invention will be described below with reference to FIGS.
Will be described with reference to. Since the entire structure of the electric motor rotor manufactured in this embodiment is similar to that of the conventional rotor shown in FIGS. 3 and 4, FIGS.
In, the common parts are denoted by the same reference numerals.
【００１８】図１を参照して、主軸挿入孔３に主軸６が
嵌挿されて固定された回転子鉄心１の各導体キャビティ
部（溝）４の内壁面に、あらかじめ低摩耗性材料よりな
る潤滑膜７を形成しておく。潤滑膜７は、該低摩耗性材
料（たとえばテフロン＝商標名）を塗布後乾燥させ、あ
るいは導体キャビティ部４の内径に応じて該低摩耗性材
料をパイプ状に成形したものを導体キャビティ部に挿入
して接合することによって形成することができる。Referring to FIG. 1, the inner wall surface of each conductor cavity portion (groove) 4 of the rotor core 1 in which the main shaft 6 is fitted and fixed in the main shaft insertion hole 3 is previously made of a low wear material. The lubricating film 7 is formed in advance. The lubricating film 7 is formed by applying the low-wear material (for example, Teflon = trademark) and then drying it, or molding the low-wear material into a pipe shape according to the inner diameter of the conductor cavity part 4 in the conductor cavity part. It can be formed by inserting and joining.
【００１９】回転子導体２となるべき導体材料として、
相対密度９０％（すなわち空隙率１０％）の純銅焼結体
バー８を用いる。この焼結体バー８は、図２に示される
ように、導体キャビティ部４内の容積よりも大きな体積
を有している。すなわち、回転子導体２は、回転子の外
表面から中心軸に向かうにつれて徐々に幅狭となる台形
状の断面を有するものであるが、焼結体バー８の導体キ
ャビティ部４に対する圧入代は、その外表面側端部にお
いてはゼロであるが、中心軸に向かうにつれて連続的に
徐々に大きくなり、中心軸側端部において最大の圧入代
を有する。そして、中心軸側端部における圧入代は、好
ましくは、焼結体バー８の空隙率と実質的に同等の容積
減少率をもたらすように設定される。As a conductor material to be the rotor conductor 2,
A pure copper sintered body bar 8 having a relative density of 90% (that is, a porosity of 10%) is used. As shown in FIG. 2, the sintered body bar 8 has a volume larger than the volume inside the conductor cavity portion 4. That is, the rotor conductor 2 has a trapezoidal cross section that gradually narrows from the outer surface of the rotor toward the central axis, but the press-fitting margin of the sintered body bar 8 into the conductor cavity portion 4 is Although it is zero at the outer surface side end, it continuously increases gradually toward the central axis, and has the maximum press-fitting margin at the central axis side end. The press-fitting margin at the central axis side end portion is preferably set so as to bring about a volume reduction rate substantially equivalent to the porosity of the sintered body bar 8.
【００２０】以上の設計において、図１に示されるよう
に、焼結体バー８を導体キャビティ部４内に圧入する。
バー８がポーラスな焼結体よりなるものであり、また、
導体キャビティ部４の内壁面には潤滑膜７があらかじめ
設けられているので、焼結体バー８の圧入はスムーズに
行うことができる。In the above design, as shown in FIG. 1, the sintered body bar 8 is press-fitted into the conductor cavity portion 4.
The bar 8 is made of a porous sintered body, and
Since the lubricating film 7 is previously provided on the inner wall surface of the conductor cavity portion 4, the sintered body bar 8 can be smoothly press-fitted.
【００２１】また、焼結体バー８の導体キャビティ部４
に対する圧入代が、外表面側端部の圧入代ゼロから中心
軸側端部における容積減少率１０％に相当する最大圧入
代まで連続的に増大するように設計されているため、圧
入完了後の回転子導体２においては、外表面側端部にお
いては焼結体バー８が何らの圧縮も受けていないことか
ら相対密度９０％のままであるが、中心軸側端部に向け
て徐々に高密度化し、中心軸側端部においては実質的に
１００％の相対密度を有するものとなる。Further, the conductor cavity portion 4 of the sintered body bar 8
Is designed to continuously increase from zero press fitting margin at the outer surface side end to the maximum press fitting margin corresponding to a volume reduction rate of 10% at the central shaft side end, so that In the rotor conductor 2, since the sintered body bar 8 is not subjected to any compression at the outer surface side end portion, the relative density remains 90%, but the relative density gradually increases toward the central axis side end portion. It becomes densified and has a relative density of substantially 100% at the end on the central axis side.
【００２２】このため、回転子の導体抵抗率は、図３に
示されるように、中心軸側から外表面側に向けて連続的
に大きくなり、導体の外表面側の電気抵抗が最大となる
ため、起動トルクを増大させて起動状態を改善すること
ができ、また、起動電流も少なくて済む。Therefore, as shown in FIG. 3, the conductor resistivity of the rotor continuously increases from the central axis side toward the outer surface side, and the electric resistance on the outer surface side of the conductor becomes maximum. Therefore, the starting torque can be increased to improve the starting state, and the starting current can be reduced.
【００２３】以上のようにして、焼結体バー８よりなる
回転子導体２を回転子鉄心１の導体キャビティ部４に強
固に密着一体化させることができる。しかる後に、プレ
ス機械による圧着やかしめ、ろう付け等の任意手段によ
り回転子導体２の両端にエンドリング５を設置して、図
４および図５に示すような電動機の回転子が製造され
る。あるいは、焼結体バー８の圧入端と反対側において
は、あらかじめ回転子鉄心１とエンドリング５を一体化
させておいてもよい。As described above, the rotor conductor 2 composed of the sintered body bar 8 can be firmly and closely integrated with the conductor cavity portion 4 of the rotor core 1. Thereafter, the end rings 5 are installed at both ends of the rotor conductor 2 by any means such as crimping by a press machine, caulking, brazing, etc., and the rotor of the electric motor as shown in FIGS. 4 and 5 is manufactured. Alternatively, the rotor core 1 and the end ring 5 may be integrated in advance on the side opposite to the press-fitting end of the sintered body bar 8.
【００２４】[0024]
【発明の効果】本発明によれば、回転子鉄心の溝内に回
転子導体が強固に一体化されるので、回転中の振動が抑
制され、振動による騒音や破損等の問題を解決すること
ができる。したがって、特に、インバータ方式により高
調波を含んだ電源で高速運転される電動機に好適に使用
可能な回転子が提供される。According to the present invention, since the rotor conductor is firmly integrated in the groove of the rotor core, vibration during rotation is suppressed, and problems such as noise and damage due to vibration are solved. You can Therefore, in particular, a rotor that can be suitably used for an electric motor that is driven at a high speed by a power source containing harmonics by an inverter system is provided.
【００２５】さらに、外表面側から中心軸側に向けて連
続的に高密度化する密度傾斜を有する回転子導体がきわ
めて簡単な製造工程により得られ、電動機の効率アップ
に寄与する。Further, a rotor conductor having a density gradient which continuously increases in density from the outer surface side toward the central axis side can be obtained by a very simple manufacturing process, and contributes to improving the efficiency of the electric motor.
【図１】本発明の一実施例による電動機回転子の製造方
法を示し、特に焼結体バーを導体キャビティ部に圧入す
る工程を示す説明図である。FIG. 1 is an explanatory view showing a method of manufacturing an electric motor rotor according to an embodiment of the present invention, and particularly showing a step of press-fitting a sintered body bar into a conductor cavity portion.
【図２】図１における焼結体バーと導体キャビティ部の
大きさの関係を示す断面図である。FIG. 2 is a cross-sectional view showing the relationship between the size of a sintered body bar and the size of a conductor cavity in FIG.
【図３】焼結体バーの圧入により得られた回転子導体に
おける抵抗値分布を示す図である。FIG. 3 is a diagram showing a resistance value distribution in a rotor conductor obtained by press-fitting a sintered body bar.
【図４】電動機回転子の一般的構成を示す断面図であ
る。FIG. 4 is a sectional view showing a general configuration of an electric motor rotor.
【図５】図４中Ｘ−Ｘ線による断面図である。5 is a cross-sectional view taken along line XX in FIG.
１ 回転子鉄心 ２ 回転子導体 ３ 主軸挿入孔 ４ 溝（導体キャビティ部） ６ 主軸 ７ 潤滑膜 ８ 純銅焼結体バー 1 Rotor Iron Core 2 Rotor Conductor 3 Spindle Insertion Hole 4 Groove (Conductor Cavity) 6 Spindle 7 Lubrication Film 8 Pure Copper Sintered Bar
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成７年４月２６日[Submission date] April 26, 1995
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００２[Name of item to be corrected] 0002
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００２】[0002]
【従来の技術】 上記構成の回転子を具備する電動機
は、従来より、汎用電動機や液封型キャンド式電動機、
真空用ルーツ型キャンド式電動機等として使用されてい
る。たとえば液封型キャンド式電動機においては、フレ
ーム内に珪素鋼板を積層してなる固定子鉄心が配設さ
れ、該固定子鉄心には固定子コイルが装着されるととも
に、その中心部には前記回転子が固定子鉄心と微小隙間
を配して主軸に貫通配設される。2. Description of the Related Art An electric motor equipped with a rotor having the above structure has been conventionally used as a general-purpose electric motor or a liquid ring canned electric motor .
It is used as vacuum roots canned type motors or the like. For example, in a liquid-sealed canned electric motor, a stator core formed by laminating silicon steel plates is arranged in a frame, a stator coil is mounted on the stator core, and the rotating core is provided at the center thereof. The child is disposed so as to penetrate the main shaft with a small clearance from the stator core.
フロントページの続き (72)発明者 曽我石 一郎 東京都中央区京橋３丁目１番１号 蛇の目 ミシン工業株式会社 (72)発明者 岩田 實 東京都大田区羽田旭町11番１号 株式会社 荏原電産内 (72)発明者 山内 信之介 東京都大田区羽田旭町11番１号 株式会社 荏原電産内Front page continuation (72) Inventor Ichiro Soga 3-1-1 Kyobashi, Chuo-ku, Tokyo Jamme Sewing Industry Co., Ltd. (72) Inventor Minoru Iwata 11-1 Haneda-Asahicho, Ota-ku, Tokyo Ebara Electric Co., Ltd. Sanai (72) Inventor Shinnosuke Yamauchi 11-1 Haneda-Asahi-cho, Ota-ku, Tokyo Ebara Densan Co., Ltd.
Claims (5)
する回転子鉄心と、前記回転子鉄心の前記導体キャビテ
ィ部に挿入される回転子導体とを備えて構成される電動
機の回転子において、前記回転子導体が焼結体よりなる
ことを特徴とする電動機の回転子。1. A rotor of an electric motor, comprising: a rotor core having a spindle insertion hole and a conductor cavity; and a rotor conductor inserted into the conductor cavity of the rotor core. A rotor of an electric motor, wherein the rotor conductor is made of a sintered body.
する回転子鉄心と、前記回転子鉄心の前記導体キャビテ
ィ部に挿入される回転子導体とを備えて構成される電動
機の回転子において、前記回転子導体において、外表面
から軸中心に向かって導体材料の密度が連続して高密度
化していることを特徴とする電動機の回転子。2. A rotor of an electric motor, comprising: a rotor core having a spindle insertion hole and a conductor cavity; and a rotor conductor inserted into the conductor cavity of the rotor core. In the rotor conductor, the density of the conductor material is continuously increased from the outer surface toward the shaft center, and the rotor of the electric motor is characterized.
電性の優れた材料の焼結体よりなり、かつ、前記導体キ
ャビティ部の内部容積より大きな体積を有する焼結体バ
ーを圧入することを特徴とする電動機の回転子の製造方
法。3. A sintered body bar made of a sintered body of a material having excellent conductivity and having a volume larger than the internal volume of the conductive cavity portion is press-fitted into the conductor cavity portion of the rotor core. A method of manufacturing a rotor of an electric motor, which is characterized.
記導体キャビティ部の内壁面に低摩耗性材料による潤滑
膜を形成することを特徴とする請求項３の電動機の回転
子の製造方法。4. The method of manufacturing a rotor for an electric motor according to claim 3, wherein a lubricating film made of a low-wear material is formed on the inner wall surface of the conductor cavity portion prior to press-fitting the sintered body bar. .
部に対する圧入代を、前記回転子の外表面側端部におけ
る圧入代ゼロから軸中心側端部においては前記焼結体バ
ーの焼結体空隙率と同等体積の圧入代となるように連続
的に変化させることを特徴とする請求項３または４の電
動機の回転子の製造方法。5. The press-fitting margin of the sintered body bar into the conductor cavity is zero from the press-fitting margin at the outer surface side end of the rotor to the sintered body of the sintered body bar at the shaft center side end. The method for manufacturing a rotor of an electric motor according to claim 3 or 4, wherein the press-fitting margin of a volume equivalent to the porosity is continuously changed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33748894A JPH08186946A (en) | 1994-12-28 | 1994-12-28 | Rotor of motor and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33748894A JPH08186946A (en) | 1994-12-28 | 1994-12-28 | Rotor of motor and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08186946A true JPH08186946A (en) | 1996-07-16 |
Family
ID=18309128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33748894A Pending JPH08186946A (en) | 1994-12-28 | 1994-12-28 | Rotor of motor and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08186946A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015133784A (en) * | 2014-01-09 | 2015-07-23 | 株式会社東芝 | induction motor |
-
1994
- 1994-12-28 JP JP33748894A patent/JPH08186946A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015133784A (en) * | 2014-01-09 | 2015-07-23 | 株式会社東芝 | induction motor |
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