JPH08205441A - Three-phase motor - Google Patents

Three-phase motor

Info

Publication number
JPH08205441A
JPH08205441A JP812995A JP812995A JPH08205441A JP H08205441 A JPH08205441 A JP H08205441A JP 812995 A JP812995 A JP 812995A JP 812995 A JP812995 A JP 812995A JP H08205441 A JPH08205441 A JP H08205441A
Authority
JP
Japan
Prior art keywords
slot
stator
leg
conductor
shaped conductor
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.)
Granted
Application number
JP812995A
Other languages
Japanese (ja)
Other versions
JP3474660B2 (en
Inventor
Shoichi Kawamata
Ryoichi Naganuma
Suetaro Shibukawa
Fumio Tajima
Koki Taneda
昭一 川又
末太郎 渋川
文男 田島
幸記 種田
良一 長沼
Original Assignee
Hitachi Ltd
株式会社日立製作所
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd, 株式会社日立製作所 filed Critical Hitachi Ltd
Priority to JP812995A priority Critical patent/JP3474660B2/en
Publication of JPH08205441A publication Critical patent/JPH08205441A/en
Application granted granted Critical
Publication of JP3474660B2 publication Critical patent/JP3474660B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE: To enhance the efficiency and reliability of a motor by composing the stator winding of a single conductor bent in nearly U-shape and connecting the nearly U-shaped conductors through a connecting conductor thereby decreasing the number of joints and the resistance of the stator winding. CONSTITUTION: A stator winding 5 is composed of a single conductor 5A nearly bent in U-shape which is inserted, at the leg part thereof, into each slot 12 of a stator core 4 from same side in the axial direction. The conductors 5A nearly bent in U-shape are then connected through a connecting conductor coupled to the terminal parts thereof. Since the conductors 5A nearly bent in U-shape are required to be connected only on one side of the stator 2 in the axial direction thereof, the number of joints is decreased and the length of the stator winding 5 is shortened thus decreasing the resistance thereof. This structure enhances the efficiency and reliability of a motor.

Description

【発明の詳細な説明】Detailed Description of the Invention
【0001】[0001]
【産業上の利用分野】本発明は3相電動機に係り、特に
低騒音、高効率、小型化に好適な3相電動機に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-phase motor, and more particularly to a three-phase motor suitable for low noise, high efficiency and miniaturization.
【0002】[0002]
【従来の技術】一般に3相電動機の固定子は、複数のス
ロットを有する固定子鉄心と、固定子鉄心の各スロット
に巻装された固定子巻線とを備えている。固定子巻線を
固定子鉄心の各スロットに巻装する方法としては、例え
ば特公平5−26422号公報及び特開平5−30
0687号公報に開示のものがある。
2. Description of the Related Art Generally, a stator of a three-phase electric motor includes a stator core having a plurality of slots, and a stator winding wound around each slot of the stator core. As a method of winding the stator winding around each slot of the stator core, for example, Japanese Patent Publication No. 5-26422 and Japanese Patent Laid-Open No. 5-30
There is one disclosed in Japanese Patent Publication No. 0687.
【0003】従来技術は、予め所要の形状に巻装した
固定子巻線を、コイル挿入装置を用いて固定子鉄心のス
ロット開口部すなわちスリットより挿入するものであ
る。また、従来技術は、固定子鉄心のスロットをクロ
ーズド型スロットとし、まず断面が略長方形の銅棒を固
定子鉄心の各スロットに挿入し、次に銅棒の両端部を渡
り線部材の脚部に結合して銅棒同士を接続することによ
り固定子巻線を形成したものである。
In the prior art, a stator winding previously wound into a desired shape is inserted from a slot opening, that is, a slit of a stator core by using a coil inserting device. Further, in the prior art, the slots of the stator core are closed type slots, first a copper rod having a substantially rectangular cross section is inserted into each slot of the stator core, and then both ends of the copper rod are connected to the legs of the crossover member. The stator winding is formed by connecting the copper rods to each other by connecting to each other.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、上記従
来技術においては、以下の問題点が存在する。一般に大
電流によって駆動される電動機では、固定子巻線を形成
する導体線径が太くなるが、この様な固定子巻線を上記
従来技術の方法によりスロットに挿入するためには、
例えば開放型スロットの採用が必要となり、スロット開
口部すなわちスリットの幅を大きくしなければならな
い。しかし、スリット幅を大きくすると空隙部の高調波
磁束が増大し、2次側の回転子バーには高調波を含んだ
電流が流れてしまう。この高調波電流はトルクに寄与し
ないため、高調波電流による回転子の損失(2次銅損)
が増大し、電動機の効率低下及び温度上昇の原因とな
り、ベアリングの寿命の低下など電動機としての信頼性
が低下すると共に、騒音発生の大きな要因となる。
However, the above-mentioned prior art has the following problems. Generally, in a motor driven by a large current, the conductor wire diameter forming the stator winding becomes thicker, but in order to insert such a stator winding into the slot by the above-mentioned conventional method,
For example, it is necessary to use an open slot, and the width of the slot opening, that is, the slit must be increased. However, if the slit width is increased, the harmonic magnetic flux in the void portion increases, and a current containing harmonics flows through the rotor bar on the secondary side. Since this harmonic current does not contribute to torque, rotor loss due to harmonic current (secondary copper loss)
Cause a decrease in the efficiency of the electric motor and an increase in the temperature, which lowers the reliability of the electric motor such as a decrease in the life of the bearing and is a major cause of noise generation.
【0005】一方、一般に数千回転の電動機では、固定
子巻線の巻回数が所要数必要であるため、上記従来技術
の方法の様に、スリットより固定子巻線を挿入しなけ
ればならない。しかし、電気自動車駆動用電動機の様に
高速回転で駆動される電動機の場合には、固定子巻線の
巻回数(ターン数)は究極的(例えば、1ターン)に減
らすことが可能である。しかし、電流密度及び占積率等
の関係から、固定子巻線の導体数は所要数必要となる。
よって、その場合には、例えば亀甲状に形成した1本の
線材(導体)を所定数束ねたものを並列接続して、見か
け上1ターンの固定子巻線として構成し、各スロットに
同数本の導体が納まるようにする。この種の固定子巻線
においても、導体部の構成は上記所要数巻回された固定
子巻線と同様であるため、やはりスリットより固定子巻
線を挿入しなければならない。従って、スリット幅は当
然のことながら固定子巻線を構成する線材の線径よりか
なり大きくなり、前述したようにスリットによる影響が
出てしまう。また、この様に構成される固定子巻線は、
導体間の隙間及びスリットから挿入する構成から、導体
数を多くするのは作業性、生産性等の点で困難である。
このため、どうしても導体間に隙間が生じ、スロット内
の占積率は低下し、その結果、固定子巻線の抵抗が増大
し、モータ効率が低下すると共に、スロット内は空気の
部分が多くなり、導体で発生した熱が空気で絶縁され、
放熱が悪くなり、温度上昇の原因となり、ベアリングの
寿命の低下等が発生する。また、占積率を上げるための
固定子巻線の導体数を増やして、無理にスロットの軸方
向から入れようとした場合、導体の部分的な潰れやコイ
ル間の絶縁不良、場合によっては断線等の現象が生じ、
各相の固定子巻線間での抵抗のバラツキが起こり、アン
バランスな電流による特性のバラツキ及び騒音増加が生
じ、このため作業性が著しく低下する。
On the other hand, generally, in a motor of several thousand rotations, the required number of windings of the stator winding is required. Therefore, the stator winding must be inserted through the slit as in the above-mentioned conventional method. However, in the case of an electric motor driven at high speed like an electric motor for driving an electric vehicle, the number of turns (the number of turns) of the stator winding can be reduced to the ultimate (for example, one turn). However, the required number of conductors of the stator winding is required due to the relationship between the current density and the space factor.
Therefore, in that case, for example, one wire rod (conductor) formed in a hexagonal shape is bundled in a predetermined number and connected in parallel to form a one-turn stator winding, and the same number of wires is provided in each slot. So that the conductor of Also in this type of stator winding, the structure of the conductor portion is the same as that of the above-described required number of windings of the stator winding, and therefore the stator winding must also be inserted from the slit. Therefore, as a matter of course, the slit width becomes considerably larger than the wire diameter of the wire material that constitutes the stator winding, and the slit has an influence as described above. In addition, the stator winding configured in this way is
It is difficult to increase the number of conductors in terms of workability, productivity, etc. due to the structure in which the conductors are inserted through the gaps and the slits.
This inevitably creates gaps between the conductors, reducing the space factor in the slots, resulting in increased resistance of the stator windings, reduced motor efficiency, and increased air content in the slots. , The heat generated by the conductor is insulated by air,
Dissipation of heat deteriorates, which causes temperature rise and shortens the life of the bearing. In addition, if the number of conductors in the stator windings is increased to increase the space factor and you try to force it from the axial direction of the slot, the conductors may be partially crushed, insulation between coils may be defective, or disconnection may occur. Such phenomenon occurs,
Variations in resistance occur between the stator windings of each phase, variations in characteristics due to unbalanced currents, and increase in noise occur, which significantly reduces workability.
【0006】また、従来技術では、固定子鉄心のスロ
ットをクローズド型スロットとし、かつ固定子巻線とし
て断面が略長方形の銅棒を使用しているため、上記スリ
ットの影響により回転子損失が増大する、スロット内の
隙間が多いことにより固定子巻線の温度が上昇するとい
った問題点は解決される。しかし、渡り線部材による銅
棒同士の接続が銅棒の両端で必要となるため、接続点が
多くなり、その接続部の接触抵抗が増加する。また、銅
棒の両端部は銅棒同士の接続のためにどうしても固定子
鉄心の軸方向に延長せざるを得なくなり、固定子巻線の
巻線長(コイルエンド長)が大きくなる。これらにより
固定子巻線の巻線抵抗が増加し、このため電機子巻線の
銅損(I2R損:Iは巻線電流、Rは巻線抵抗)も増加
し、モータ効率が低下する。また、導体同士の接続点が
多いので、その接続部の発熱、絶縁処理の増加等が生
じ、信頼性が低下するという問題も生じる。
Further, in the prior art, since the slots of the stator core are closed slots and the stator windings are made of copper rods having a substantially rectangular cross section, rotor loss is increased due to the influence of the slits. However, the problem that the temperature of the stator winding rises due to the large number of gaps in the slots is solved. However, since the copper rods need to be connected to each other by the crossover members at both ends of the copper rods, the number of connection points increases and the contact resistance of the connection portion increases. Further, both ends of the copper rods have to be extended in the axial direction of the stator core in order to connect the copper rods to each other, and the winding length (coil end length) of the stator winding increases. As a result, the winding resistance of the stator winding increases, and therefore the copper loss (I 2 R loss: I is the winding current, R is the winding resistance) of the armature winding also increases, and the motor efficiency decreases. . In addition, since there are many connecting points between the conductors, heat generation at the connecting portions, increase in insulation treatment, and the like occur, and there is a problem that reliability decreases.
【0007】本発明の目的は、モータ効率が高くかつ信
頼性の高い3相電動機を提供することにある。
An object of the present invention is to provide a three-phase electric motor having high motor efficiency and high reliability.
【0008】[0008]
【課題を解決するための手段】上記の目的を達成するた
めに本発明は、径方向内側に開口した複数の開放型スロ
ットを有する固定子鉄心と、前記固定子鉄心の各スロッ
トに巻装された固定子巻線とを備えた3相電動機におい
て、前記固定子巻線を、1本の導体をU字形状に屈曲さ
せかつU字の脚部部分を略矩形の断面形状とした略U字
形導体で構成し、この略U字形導体の脚部部分を前記固
定子鉄心の各スロットに軸方向より挿入し、前記脚部部
分を異なるスロットに挿入された略U字形導体の脚部部
分に接続用の導体を介して接続した構成とする。
In order to achieve the above object, the present invention is directed to a stator core having a plurality of open slots radially inward and wound around each slot of the stator core. And a stator winding, the stator winding is substantially U-shaped with one conductor bent into a U-shape and the U-shaped leg portion having a substantially rectangular cross-sectional shape. A conductor, the leg portions of the substantially U-shaped conductor are axially inserted into the slots of the stator core, and the leg portions are connected to the leg portions of the substantially U-shaped conductor inserted in different slots. It is configured to be connected via a conductor for use.
【0009】また、上記の目的を達成するために本発明
は、径方向内側に開口しない複数のクローズド型スロッ
トを有する固定子鉄心と、前記固定子鉄心の各スロット
に巻装された固定子巻線とを備えた3相電動機におい
て、前記固定子巻線を、1本の導体をU字形状に屈曲さ
せかつU字の脚部部分を略矩形の断面形状とした略U字
形導体で構成し、この略U字形導体の脚部部分を前記固
定子鉄心の各スロットに軸方向より挿入し、前記脚部部
分を異なるスロットに挿入された略U字形導体の脚部部
分に接続用の導体を介して接続した構成とする。
In order to achieve the above object, the present invention provides a stator core having a plurality of closed type slots that do not open inward in the radial direction, and a stator winding wound around each slot of the stator core. A three-phase electric motor having a wire, wherein the stator winding is formed of a substantially U-shaped conductor in which one conductor is bent into a U-shape and the U-shaped leg portion has a substantially rectangular cross-sectional shape. The leg portion of the substantially U-shaped conductor is axially inserted into each slot of the stator core, and the leg portion is connected to the leg portion of the substantially U-shaped conductor inserted in a different slot. It is configured to be connected via.
【0010】上記3相電動機において、好ましくは、前
記略U字形導体の脚部部分の幅が前記開放型スロットの
開口部のスリット幅より大きい。
In the above three-phase electric motor, preferably, the width of the leg portion of the substantially U-shaped conductor is larger than the slit width of the opening of the open type slot.
【0011】また、好ましくは、前記略U字形導体の脚
部部分の幅が前記固定子鉄心の各スロットの径方向内側
の幅にほぼ等しい。
Further, preferably, the width of the leg portion of the substantially U-shaped conductor is substantially equal to the width of each slot of the stator core on the radially inner side.
【0012】さらに、好ましくは、前記略U字形導体の
脚部部分は全て軸方向の同じ側から前記固定子鉄心の各
スロットに挿入されている。
Further, preferably, all the leg portions of the substantially U-shaped conductor are inserted into the respective slots of the stator core from the same side in the axial direction.
【0013】また、好ましくは、前記略U字形導体は1
本の導体で1極1ターンの固定子巻線を構成しており、
前記固定子鉄心の各スロットに異なる略U字形導体の2
本の脚部部分が上下2層に配置されている。
Also, preferably, the substantially U-shaped conductor is 1
One conductor and one turn of stator winding is composed of this conductor,
Two different U-shaped conductors are provided in each slot of the stator core.
The legs of the book are arranged in two layers, upper and lower.
【0014】また、好ましくは、前記固定子鉄心の各ス
ロットに異なる略U字形導体の複数本の脚部部分が上下
複数層に配置されており、前記略U字形導体の各脚部部
分の断面形状を、断面積が同じで各脚部部分が位置する
スロット形状に適合した略台形とした。
Preferably, a plurality of leg portions of different substantially U-shaped conductors are arranged in upper and lower layers in each slot of the stator core, and a cross section of each leg portion of the substantially U-shaped conductor is provided. The shape is a substantially trapezoidal shape that has the same cross-sectional area and conforms to the slot shape in which each leg portion is located.
【0015】[0015]
【作用】以上のように構成した本発明の3相電動機にお
いては、固定子巻線を、1本の導体をU字形状に屈曲さ
せた略U字形導体で構成したことにより、接続用の導体
を介して異なる略U字形導体同士を接続するとき、銅棒
で固定子巻線を構成する従来技術に比しその接続点が減
少すると共に、その接続のための略U字形導体の軸方向
スペースも少なくて済むため固定子巻線の巻線長は短く
なる。これにより、固定子巻線の巻線抵抗が減少し、電
機子巻線の銅損も減少し、モータ効率が高くなる。ま
た、上記のように導体同士の接続点が減少するので、そ
の接続部の発熱や絶縁処理等も減少し、信頼性が高くな
ると共に、固定子巻線の形成作業が容易になる、コスト
が安価になる等の利点がある。さらに、略U字形導体の
脚部部分を固定子鉄心の各スロットに軸方向より挿入す
ることにより、開放型スロットを有する固定子鉄心を用
いる場合には、略U字形導体の脚部部分の幅に比しスロ
ットの開口部のスリット幅を充分小さくすることがで
き、あるいはクローズド型スロットを有する固定子鉄心
を用いることができ、これによりスリットによる回転子
損失が低減され、信頼性が向上しかつ騒音が少なくな
る。また、上記略U字形導体のU字の脚部部分を略矩形
の断面形状としたことにより、スロット内の占積率が高
くすることが可能となり、その結果、固定子巻線の抵抗
が小さくなり、モータ効率が高くなると共に、固定子巻
線の熱伝導性が良くなり、固定子巻線の温度上昇が低減
される。
In the three-phase motor of the present invention constructed as described above, the stator winding is formed of a substantially U-shaped conductor in which one conductor is bent into a U-shape. When different U-shaped conductors are connected to each other via a coil, the number of connection points is reduced as compared with the prior art in which the stator winding is formed of a copper rod, and the axial space of the U-shaped conductor for the connection is reduced. Since the number is also small, the winding length of the stator winding becomes short. This reduces the winding resistance of the stator winding, reduces the copper loss of the armature winding, and improves motor efficiency. Further, since the number of connecting points between the conductors is reduced as described above, heat generation and insulation treatment of the connecting portions are also reduced, the reliability is improved, and the work of forming the stator winding is facilitated, and the cost is reduced. There are advantages such as low cost. Further, by inserting the leg portion of the substantially U-shaped conductor into each slot of the stator core from the axial direction, when using the stator core having the open type slots, the width of the leg portion of the substantially U-shaped conductor is used. The width of the slit at the opening of the slot can be made sufficiently small, or a stator core having a closed slot can be used, which reduces rotor loss due to the slit and improves reliability. Noise is reduced. Further, since the U-shaped leg portion of the above-mentioned U-shaped conductor has a substantially rectangular cross-sectional shape, the space factor in the slot can be increased, and as a result, the resistance of the stator winding is reduced. As a result, the motor efficiency is increased, the thermal conductivity of the stator winding is improved, and the temperature rise of the stator winding is reduced.
【0016】また、開放型スロットを有する固定子鉄心
を用いる場合には、略U字形導体の脚部部分の幅を開放
型スロットの開口部のスリット幅より大きくするか、あ
るいは固定子鉄心の各スロットの径方向内側の幅にほぼ
等しくすることにより、クローズド型スロットを有する
固定子鉄心を用いる場合には、略U字形導体の脚部部分
の幅を固定子鉄心の各スロットの径方向内側の幅にほぼ
等しくすることにより、スロット内の占積率が高くな
り、これにより、固定子巻線の抵抗が小さくなり、モー
タ効率がより高くなると共に、固定子巻線の熱伝導性能
が良くなり、固定子巻線の温度上昇がより低減される。
When using a stator core having an open type slot, the width of the leg portion of the substantially U-shaped conductor is made larger than the slit width of the opening of the open type slot, or each of the stator cores is made wider. When the stator core having a closed type slot is used by making it approximately equal to the width of the inner side of the slot in the radial direction, the width of the leg portion of the substantially U-shaped conductor is set to the inner side in the radial direction of each slot of the stator core. By making the width almost equal, the space factor in the slot is increased, which reduces the resistance of the stator winding, improves the motor efficiency, and improves the heat transfer performance of the stator winding. The temperature rise of the stator winding is further reduced.
【0017】また、略U字形導体の脚部部分を全て軸方
向の同じ側から固定子鉄心の各スロットに挿入すること
により、接続用の導体を介しての異なる略U字形導体同
士の接続は固定子の軸方向のいずれか一方の側だけで済
み、その接続のための略U字形導体の軸方向スペースも
その側だけに存在することになり、これによりモータが
軸方向に短くなり、モータの小型化が可能となる。
Further, by inserting all the leg portions of the substantially U-shaped conductor into the respective slots of the stator core from the same side in the axial direction, it is possible to connect different substantially U-shaped conductors to each other through the conductor for connection. Only one side of the stator in the axial direction is required, and the axial space of the substantially U-shaped conductor for its connection is also present only on that side, which shortens the motor in the axial direction, Can be downsized.
【0018】また、略U字形導体の各脚部部分の断面形
状を、断面積が同じで各脚部部分が位置するスロット形
状に適合した略台形としたことにより、スロット内の占
積率をより高くすることが可能となり、固定子巻線の抵
抗が小さくなり、モータ効率がより高くなると共に、固
定子巻線の熱伝導性能が良くなり、固定子巻線の温度上
昇がより低減される。
Further, the cross-sectional shape of each leg portion of the substantially U-shaped conductor is a substantially trapezoidal shape having the same cross-sectional area and conforming to the slot shape in which each leg portion is located. It is possible to make it higher, the resistance of the stator winding becomes smaller, the motor efficiency becomes higher, the heat conduction performance of the stator winding becomes better, and the temperature rise of the stator winding is further reduced. .
【0019】[0019]
【実施例】以下、本発明の実施例を図面を参照して説明
する。まず、本発明の一実施例を図1〜図10により説
明する。本実施例の3相電動機は誘導電動機1であり、
この誘導電動機1は図1に示すように固定子2を備えて
いる。固定子2はハウジング9と、このハウジング9の
内周面に固定された固定子鉄心4と、この固定子鉄心4
に巻装された固定子巻線5とを有している。固定子2と
は一定のギャップを隔てて回転子3が配置され、この回
転子3はシャフト8と、このシャフト8に一体回転可能
に取り付けられ例えば積層珪素鋼板からなる回転子鉄心
6と、導体71及びエンドリング721,722からな
る篭型巻線7とを有している。また、シャフト8はベア
リング11,111及びエンドブラケット10,101
によって固定子2に回転自在に保持される。
Embodiments of the present invention will be described below with reference to the drawings. First, an embodiment of the present invention will be described with reference to FIGS. The three-phase motor of this embodiment is the induction motor 1,
The induction motor 1 includes a stator 2 as shown in FIG. The stator 2 includes a housing 9, a stator core 4 fixed to the inner peripheral surface of the housing 9, and a stator core 4
And a stator winding 5 wound around the. A rotor 3 is arranged with a certain gap from the stator 2, the rotor 3 is provided with a shaft 8, a rotor core 6 made of, for example, a laminated silicon steel plate and made of laminated silicon steel, and a conductor. 71 and end cages 721 and 722. Further, the shaft 8 includes bearings 11 and 111 and end brackets 10 and 101.
It is rotatably held by the stator 2.
【0020】固定子2の固定子鉄心4は図2に示すよう
に、径方向内側に開口した12個の開放型スロット12
を有し、各々のスロット12内に固定子巻線5が納めら
れている。この固定子巻線5は図3に示すように、U
相、V相、W相からなる3相固定子巻線であり、一端が
モータ端子U,V,W、他端が中性点UN,VN,WN
となっている。U相、V相、W相の各中性点UN,V
N,WNは共通に接続され、モータ端子U,V,Wはイ
ンバータ等の駆動用電源に接続されている。固定子鉄心
4及び固定子巻線5は全体で3相4極を構成している。
As shown in FIG. 2, the stator core 4 of the stator 2 has twelve open slots 12 which are open radially inward.
And a stator winding 5 is housed in each slot 12. As shown in FIG. 3, this stator winding 5 has U
It is a three-phase stator winding consisting of three phases, V phase and W phase, one end is motor terminal U, V, W, and the other end is neutral point UN, VN, WN.
Has become. Neutral points UN, V of U phase, V phase, W phase
N and WN are commonly connected, and motor terminals U, V and W are connected to a driving power source such as an inverter. The stator core 4 and the stator windings 5 collectively form a three-phase four-pole.
【0021】固定子巻線5は図4に示すように、1本の
導体を略U字形状に屈曲させかつU字の脚部部分5a,
5bを略矩形(四角形)例えば略長方形の断面形状とし
た略U字形導体5Aと、異なる略U字形導体5A同士を
所定の関係で接続する接続用導体5Bとで構成され、略
U字形導体5Aの脚部部分5a,5bを固定子鉄心4の
各スロット12に軸方向より挿入し、その脚部部分5
a,5bを異なるスロット12に挿入された略U字形導
体5Aの脚部部分5a,5bに接続用導体5Bを介して
接続する。なお、略U字形導体5Aの脚部部分5a,5
bには端子部5c,5dが設けられ、この端子部5c,
5dに接続用導体5Bを結合して異なる略U字形導体5
A同士を接続したり、固定子巻線5のモータ端子U,
V,W及び中性点UN,VN,WNと接続する。
As shown in FIG. 4, the stator winding 5 is formed by bending one conductor into a substantially U-shape and forming a U-shaped leg portion 5a,
A substantially U-shaped conductor 5A having a substantially rectangular (quadrangular) cross section, for example, a substantially rectangular cross-section, and a connecting conductor 5B for connecting different substantially U-shaped conductors 5A to each other in a predetermined relationship, and a substantially U-shaped conductor 5A. The leg parts 5a and 5b of the stator core 4 are axially inserted into the slots 12 of the stator core 4 and
a and 5b are connected to the leg portions 5a and 5b of the substantially U-shaped conductor 5A inserted in different slots 12 via the connecting conductor 5B. The leg portions 5a, 5 of the substantially U-shaped conductor 5A
b is provided with terminal portions 5c and 5d.
Different substantially U-shaped conductor 5 by connecting the connecting conductor 5B to 5d
A is connected to each other, the motor terminal U of the stator winding 5,
Connect to V, W and neutral points UN, VN, WN.
【0022】略U字形導体5Aは、図5に示すように、
1本の導体で1極1ターンの固定子巻線5を構成してお
り、固定子鉄心4の各スロット12に異なる略U字形導
体5Aの2本の脚部部分5a,5bが上下2層に配置さ
れている。また、略U字形導体5Aは、脚部部分5a,
5bの幅Hがスロット12の開口部12aのスリット幅
Sより大きくかつ各スロット12の径方向内側の幅Kに
ほぼ等しい。また、脚部部分5a,5bの断面積は等し
いことは言うまでもない。
The substantially U-shaped conductor 5A, as shown in FIG.
The stator winding 5 of one pole and one turn is configured by one conductor, and the two leg portions 5a and 5b of the different substantially U-shaped conductor 5A are arranged in the upper and lower two layers in each slot 12 of the stator core 4. It is located in. In addition, the substantially U-shaped conductor 5A includes leg portions 5a,
The width H of 5b is larger than the slit width S of the opening 12a of the slot 12 and is substantially equal to the width K of each slot 12 on the radially inner side. Needless to say, the cross-sectional areas of the leg portions 5a and 5b are the same.
【0023】固定子巻線5を形成する作業を図6及び図
7に示す。図6及び図7は説明を解りやすくするために
図2を平面に展開した図であり、U相の固定子巻線5の
みについて示している。略U字形導体5Aは図6に示す
ように、脚部部分5a,5bが全て固定子鉄心4の軸方
向の同じ側からスロット12に挿入した後で、所定の接
続が行われる。
The operation of forming the stator winding 5 is shown in FIGS. 6 and 7 are diagrams in which FIG. 2 is developed on a plane for the sake of easy understanding, and only the U-phase stator winding 5 is shown. As shown in FIG. 6, the substantially U-shaped conductor 5A is subjected to a predetermined connection after the leg portions 5a and 5b are all inserted into the slots 12 from the same axial side of the stator core 4.
【0024】すなわち、1つの略U字形導体5Aの脚部
部分5a,5bのうち一方の脚部部分5aはU相(1)
のスロット12の径方向内側(開口部12a側)に納め
られ、他方の脚部部分5bはU’相(4)のスロット1
2の径方向外側(反開口部側)に納められる。同様に、
1つの略U字形導体5Aの脚部部分5a,5bのうち一
方の脚部部分5aはU’相(4)のスロット12の径方
向内側に納められ、他方の脚部部分5bはU相(7)の
スロット12の径方向外側に納められ、1つの略U字形
導体5Aの脚部部分5a,5bのうち一方の脚部部分5
aはU相(7)のスロット12の径方向内側に納めら
れ、他方の脚部部分5bはU’相(10)のスロット1
2の径方向外側に納められ、1つの略U字形導体5Aの
脚部部分5a,5bのうち一方の脚部部分5aはU’相
(10)のスロット12の径方向内側に納められ、他方
の脚部部分5bはU相(1)のスロット12の径方向外
側に納められる。なお、図示はしないが、V相及びW相
も同様の方法で構成される。固定子鉄心4のスロット1
2に軸方向より挿入された略U字形導体5Aの各脚部部
分5a,5bの端部は固定子鉄心4に沿って成形し、例
えば図7に示すように略長方形若しくは亀甲型の略U字
形導体5Aになるようにする。成形された略U字形導体
5Aの端子部5c,5dには、例えば隣接する各略U字
形導体5Aの巻方向が逆方向となるよう接続用導体5B
を結合して各々直列に接続する。このようにして、U
相、V相、W相の固定子巻線5がそれぞれ形成される。
That is, one leg portion 5a of the leg portions 5a and 5b of one substantially U-shaped conductor 5A has a U phase (1).
Slot 12 of the U'phase (4), and the other leg portion 5b is housed inside the slot 12 in the radial direction (on the side of the opening 12a).
It is stored on the outer side in the radial direction of 2 (on the side opposite the opening). Similarly,
Of the leg portions 5a and 5b of one substantially U-shaped conductor 5A, one leg portion 5a is housed inside the slot 12 of the U'phase (4) in the radial direction, and the other leg portion 5b is the U phase ( 7) is radially outside the slot 12 and is one of the leg portions 5a and 5b of the one substantially U-shaped conductor 5A.
a is housed inside the slot 12 of the U phase (7) in the radial direction, and the other leg portion 5b is a slot 1 of the U'phase (10).
2, one leg portion 5a of the leg portions 5a, 5b of one substantially U-shaped conductor 5A is placed radially inside the U'phase (10) slot 12, and the other one The leg portion 5b is housed outside the U-phase (1) slot 12 in the radial direction. Although not shown, the V phase and the W phase are also configured by the same method. Slot 1 of stator core 4
The end portions of the leg portions 5a and 5b of the substantially U-shaped conductor 5A inserted in the axial direction 2 are molded along the stator core 4 and, for example, as shown in FIG. Make the conductor 5A. In the terminal portions 5c and 5d of the molded substantially U-shaped conductor 5A, for example, the connecting conductor 5B is arranged so that the winding directions of the adjacent substantially U-shaped conductors 5A are opposite to each other.
Are connected and connected in series. In this way, U
Phase, V phase, and W phase stator windings 5 are formed, respectively.
【0025】なお、図8に示すように略U字形導体50
の脚部部分50a,50bが、例えばU相(7)のスロ
ット12の径方向外側とU’相(10)のスロット12
の径方向内側にすっぽり挿入されるように、前もって略
U字形導体50の中央部分50fを段状に成形しておい
てもよく、このようにすれば作業性が向上する。
Incidentally, as shown in FIG. 8, a substantially U-shaped conductor 50 is provided.
Leg portions 50a, 50b of the U-phase (7) slot 12 and the U'-phase (10) slot 12 respectively.
The central portion 50f of the substantially U-shaped conductor 50 may be formed in a step shape in advance so that the central portion 50f can be completely inserted radially inward.
【0026】以上のように構成した本実施例の3相電動
機によれば、U相、V相、W相の各々の固定子巻線5
を、1本の導体をU字形状に屈曲させた略U字形導体5
Aで構成し、この略U字形導体5Aの脚部部分5a,5
bを全て軸方向の同じ側から固定子鉄心4の各スロット
12に挿入し、接続用導体5Bを略U字形導体5Aの端
子部5aに結合して異なる略U字形導体5A同士を所定
の関係で接続するので、略U字形導体5A同士の接続が
固定子2の軸方向のいずれか一方の側だけで済み、銅棒
を用いて固定子巻線を形成する場合に比し、その接続点
が半分になると共に、その接続のための略U字形導体5
Aの軸方向スペースも半分で済むため固定子巻線5の巻
線長(コイルエンド長)は短くなる。このため、固定子
巻線5の巻線抵抗が減少し、回転子3の篭型巻線7の銅
損(I2R損:Iは巻線電流、Rは巻線抵抗)も減少
し、モータ効率が高くなる。また、略U字形導体5A同
士の接続点が少ないので、その接続部の発熱や絶縁処理
等も減少し、信頼性が高くなると共に、固定子巻線5の
形成作業が容易になる、コストが安価になる等の利点が
ある。さらに、略U字形導体5A同士の接続のための略
U字形導体5Aの軸方向スペースは固定子2の軸方向の
いずれか一方の側だけに存在することになり、誘導電動
機1が軸方向に短くなり小型化が可能となる。
According to the three-phase electric motor of the present embodiment having the above-mentioned structure, the stator windings 5 for each of the U phase, V phase and W phase are provided.
Is a substantially U-shaped conductor 5 in which one conductor is bent into a U-shape
And the leg portions 5a, 5 of the substantially U-shaped conductor 5A.
All b are inserted into each slot 12 of the stator core 4 from the same side in the axial direction, the connecting conductor 5B is connected to the terminal portion 5a of the substantially U-shaped conductor 5A, and different substantially U-shaped conductors 5A have a predetermined relationship. Since the U-shaped conductors 5A are connected to each other only on one side in the axial direction of the stator 2, the connecting point is different from the case where the stator winding is formed using a copper rod. Is half, and a substantially U-shaped conductor 5 for the connection
Since the space in the axial direction of A is half, the winding length (coil end length) of the stator winding 5 is shortened. Therefore, the winding resistance of the stator winding 5 is reduced, and the copper loss (I 2 R loss: I is the winding current, R is the winding resistance) of the cage winding 7 of the rotor 3 is also reduced, Motor efficiency increases. Further, since there are few connection points between the substantially U-shaped conductors 5A, heat generation and insulation treatment of the connection portions are reduced, reliability is improved, and the work of forming the stator winding 5 is facilitated. There are advantages such as low cost. Further, the axial space of the substantially U-shaped conductor 5A for connecting the substantially U-shaped conductors 5A is present only on one side of the stator 2 in the axial direction, and the induction motor 1 is axially arranged. It can be shortened and downsized.
【0027】また、図9及び図10に示すように、複数
本の丸線材を並列接続することにより固定子巻線55を
構成する場合には、例え整列に巻いても線間には空隙部
ができ出来てしまうことは避けられない。実際には、作
業性、生産性、線材の潰れや絶縁不良等の信頼性等から
整列巻は困難であるため、線間の空隙部は増加し、スロ
ット12内の占積率は低下する。
Further, as shown in FIG. 9 and FIG. 10, when the stator winding 55 is constructed by connecting a plurality of round wire materials in parallel, even if they are wound in an aligned manner, there is a space between the wires. It is inevitable that you can do it. Actually, since aligned winding is difficult due to workability, productivity, reliability of wire rod crushing and insulation failure, etc., the space between the wires increases and the space factor in the slot 12 decreases.
【0028】これに対し本実施例では、固定子巻線5を
1本の導体からなりかつU字の脚部部分5a,5bを略
長方形の断面形状とした略U字形導体5Aで構成すると
共に、略U字形導体5Aの脚部部分5a,5bの幅がス
ロット12の開口部12aのスリット幅Sより大きくか
つ固定子鉄心4の各スロット12の径方向内側の幅Kに
ほぼ等しいので、スロット12内の占積率の向上を図る
ことができ、これにより、固定子巻線5の抵抗が小さく
なり、モータ効率が高くなると共に、固定子巻線5の熱
伝導性が良くなり、固定子巻線5の温度上昇が低減され
る。
On the other hand, in this embodiment, the stator winding 5 is composed of a single conductor, and the U-shaped leg portions 5a and 5b are composed of a substantially U-shaped conductor 5A having a substantially rectangular cross section. Since the width of the leg portions 5a and 5b of the substantially U-shaped conductor 5A is larger than the slit width S of the opening 12a of the slot 12 and is substantially equal to the radially inner width K of each slot 12 of the stator core 4, It is possible to improve the space factor in the stator 12, and thus the resistance of the stator winding 5 is reduced, the motor efficiency is increased, and the thermal conductivity of the stator winding 5 is improved. The temperature rise of the winding 5 is reduced.
【0029】また、略U字形導体5Aの脚部部分5a,
5bを固定子鉄心4の各スロット12に軸方向より挿入
するので、略U字形導体5Aの幅Hに比しスリット幅S
を充分小さくでき、これによりスリット12aによる回
転子損失が低減され、信頼性が向上しかつ騒音が少なく
なる。
Further, the leg portion 5a of the substantially U-shaped conductor 5A,
Since 5b is inserted into each slot 12 of the stator core 4 from the axial direction, the slit width S is larger than the width H of the substantially U-shaped conductor 5A.
Can be made sufficiently small, whereby the rotor loss due to the slit 12a is reduced, the reliability is improved and the noise is reduced.
【0030】以上のように本実施例によれば、固定子巻
線5の巻線抵抗が減少し、モータ効率が高くなる。ま
た、略U字形導体5Aと接続用導体5Bの接続部の発熱
や絶縁処理等も減少し、信頼性が高くなると共に、固定
子巻線5の形成作業が容易になる、コストが安価になる
等の利点がある。さらに、誘導電動機1が軸方向に短く
なり小型化が可能となる。
As described above, according to this embodiment, the winding resistance of the stator winding 5 is reduced and the motor efficiency is increased. Further, heat generation, insulation treatment, etc. of the connecting portion of the substantially U-shaped conductor 5A and the connecting conductor 5B are reduced, the reliability is improved, the work of forming the stator winding 5 is facilitated, and the cost is reduced. And so on. Further, the induction motor 1 is shortened in the axial direction, and the size can be reduced.
【0031】また、スロット12内の占積率が向上し、
モータ効率が高くなると共に、固定子巻線5の温度上昇
が低減される。また、スリット12aによる回転子損失
が低減され、信頼性が向上しかつ騒音が少なくなる。
Further, the space factor in the slot 12 is improved,
The motor efficiency is increased and the temperature rise of the stator winding 5 is reduced. Further, rotor loss due to the slit 12a is reduced, reliability is improved, and noise is reduced.
【0032】本発明の他の実施例を図11及び図12に
より説明する。この実施例の固定子巻線は、図11及び
図12に示すように、スロット12内に納められる略U
字形導体51の脚部部分51a,51bの断面形状を、
各脚部部分51a,51bが位置するスロット12の形
状に適合した略台形として、スロット12の径方向内側
及び径方向外側によって断面形状を異なる様にしてい
る。すなわち、略U字形導体51のスロット12の径方
向内側に納められる脚部部分51aの断面形状とスロッ
ト12の径方向外側に納められる脚部部分51bの断面
形状は断面積を同じくして、各々スロット12の形状に
応じて形状を異なるようにしており、脚部部分51a,
51bを合わせた断面形状はほぼスロット形状と合うよ
うに構成されている。このような断面形状を持つ略U字
形導体51の脚部部分51a,51bは、例えば図11
に示すように、丸線の線材を略台形の形状に圧縮成型す
ることにより得られ、この略U字形導体51の脚部部分
51a,51bを固定子鉄心4のスロット12に軸方向
より挿入することにより上記の構成が得られる。
Another embodiment of the present invention will be described with reference to FIGS. The stator winding of this embodiment, as shown in FIGS. 11 and 12, is substantially U-shaped and is housed in the slot 12.
The cross-sectional shape of the leg portions 51a and 51b of the character-shaped conductor 51 is
Each leg portion 51a, 51b is formed into a substantially trapezoidal shape that matches the shape of the slot 12 in which the cross-sectional shape differs depending on the radially inner side and the radially outer side of the slot 12. That is, the cross-sectional shape of the leg portion 51a accommodated inside the slot 12 of the substantially U-shaped conductor 51 and the cross-sectional shape of the leg portion 51b accommodated outside the slot 12 in the radial direction have the same cross-sectional area. The shape is made different according to the shape of the slot 12, and the leg portion 51a,
The cross-sectional shape of 51b is configured so as to substantially match the slot shape. The leg portions 51a and 51b of the substantially U-shaped conductor 51 having such a cross-sectional shape are shown in FIG.
As shown in FIG. 5, the round wire material is obtained by compression molding into a substantially trapezoidal shape, and the leg portions 51a and 51b of the substantially U-shaped conductor 51 are axially inserted into the slots 12 of the stator core 4. As a result, the above configuration is obtained.
【0033】本実施例によれば、スロット12内の占積
率がより高くなるため、固定子巻線の抵抗が小さくな
り、モータ効率がより高くなると共に、固定子巻線の熱
伝導性が良くなり、固定子巻線の温度上昇がより低減さ
れる。
According to this embodiment, since the space factor in the slot 12 becomes higher, the resistance of the stator winding becomes smaller, the motor efficiency becomes higher, and the heat conductivity of the stator winding becomes higher. The temperature rise of the stator winding is further reduced.
【0034】本発明のさらに他の実施例を図13により
説明する。この実施例は開放型スロット12を有する固
定子鉄心4の代わりに、スリットの無いクローズド型ス
ロット120を有する固定子鉄心41とし、固定子巻線
5の略U字形導体5Aの脚部部分5a,5bを固定子鉄
心41のスロット120に軸方向より挿入したものであ
る。このものにおいて、略U字形導体5Aの脚部部分5
a,5bの幅Hを各スロット12の径方向内側の幅Kに
ほぼ等しくすることは、前述の開放型スロット12を有
する固定子鉄心4を用いる実施例と同様である。
Still another embodiment of the present invention will be described with reference to FIG. In this embodiment, instead of the stator core 4 having the open type slot 12, a stator core 41 having a closed type slot 120 without slit is used, and the leg portion 5a of the substantially U-shaped conductor 5A of the stator winding 5 is 5b is inserted into the slot 120 of the stator core 41 from the axial direction. In this, the leg portion 5 of the substantially U-shaped conductor 5A
Making the width H of a and 5b approximately equal to the width K of the inside of each slot 12 in the radial direction is the same as the embodiment using the stator core 4 having the open slot 12 described above.
【0035】本実施例によれば、スリットによる回転子
損失が無くなり、より信頼性が向上しかつ騒音が少なく
なる。
According to this embodiment, the rotor loss due to the slit is eliminated, the reliability is further improved and the noise is reduced.
【0036】なお、以上の実施例においては、固定子巻
線5の略U字形導体5A;51を単線である1本の導体
で構成するものしたが、これに限らず熱溶着性の絶縁エ
ナメルの丸線もしくは平各線を多数集合させて1本の導
体に整形したもので構成することも可能である。この場
合には、高周波の抵抗が小さくなり、モータ効率が向上
する。
In the above embodiment, the substantially U-shaped conductor 5A; 51 of the stator winding 5 is composed of one conductor which is a single wire. However, the present invention is not limited to this. It is also possible to collect a number of round wires or flat wires and shape them into one conductor. In this case, the high frequency resistance is reduced and the motor efficiency is improved.
【0037】また、固定子鉄心4;41の各スロット1
2;120に異なる略U字形導体5A;51の2本の脚
部部分5a,5b;51a,51bが上下2層に配置さ
れる構成としたが、これに限らず異なる略U字形導体の
複数本の脚部部分が上下複数層に配置される構成として
もよい。この場合には、略U字形導体の各脚部部分の断
面形状を、断面積が同じで各脚部部分が位置するスロッ
トの形状に適合した略台形とする。
Each slot 1 of the stator core 4; 41
2; 120 has a configuration in which two leg portions 5a, 5b; 51a, 51b of different substantially U-shaped conductors 5A; 51 are arranged in upper and lower two layers, but not limited to this, a plurality of different substantially U-shaped conductors The leg portions of the book may be arranged in a plurality of upper and lower layers. In this case, the cross-sectional shape of each leg portion of the substantially U-shaped conductor is a substantially trapezoidal shape having the same cross-sectional area and adapted to the shape of the slot in which each leg portion is located.
【0038】また、固定子巻線5の略U字形導体5A;
51の脚部部分5a,5b;51a,51bを全て固定
子鉄心4;41の軸方向の一方よりスロット12;12
0に挿入する場合について示したが、例えば2台のイン
バータにより回転数を高速用及び低速用に切り替えて運
転する場合などでは、高速駆動用の固定子巻線と低速駆
動用の固定子巻線とを分けて、各々別々に固定子鉄心
4;41の軸方向の両方よりスロット12;120に挿
入しても良い。この場合、電動機の固定子巻線の引出線
を左右に引き出し、各々左右のインバータに接続すれ
ば、電気自動車駆動用として使用する場合などでは、電
気自動車の重量バランスがとれると共に、インバータも
左右に配置するためインバータが発生する熱も分散で
き、インバータへの配線も最短距離で行えるなどの利点
があり、電気自動車全体の信頼性が高まる。
The substantially U-shaped conductor 5A of the stator winding 5;
All of the leg portions 5a, 5b; 51a, 51b of 51 are slot 12; 12 from one side of the stator core 4; 41 in the axial direction.
Although the case of inserting into 0 is shown, for example, when operating by switching the rotation speed for high speed and low speed by two inverters, a stator winding for high speed drive and a stator winding for low speed drive , And may be separately inserted into the slots 12; 120 from both the axial directions of the stator cores 4; 41. In this case, by pulling out the lead wires of the stator winding of the electric motor to the left and right and connecting them to the left and right inverters, respectively, when used for driving an electric vehicle, the weight of the electric vehicle can be balanced and the inverter can also be moved left and right. Due to the arrangement, the heat generated by the inverter can be dispersed and the wiring to the inverter can be performed in the shortest distance.
【0039】また、本発明は回転型の誘導電動機に適用
した場合について説明したが、本発明はこれに限らず、
直線型のリニアモータに適用しても同様の効果が得られ
る。また、同期電動機にも適用でき、この場合には、固
定子と永久磁石回転子の磁極間に働くコギングトルクの
低減効果が得られる。
Although the present invention has been described in the case of being applied to a rotary induction motor, the present invention is not limited to this.
The same effect can be obtained when applied to a linear type linear motor. It can also be applied to a synchronous motor, in which case the effect of reducing the cogging torque acting between the magnetic poles of the stator and the permanent magnet rotor can be obtained.
【0040】[0040]
【発明の効果】本発明によれば、固定子巻線を、1本の
導体をU字形状に屈曲させかつU字の脚部部分を略矩形
の断面形状とした略U字形導体で構成したので、固定子
巻線の巻線抵抗が減少し、電機子巻線の銅損も減少し、
モータ効率が高くなると共に、導体同士の接続点が減少
し、信頼性が高くなる。
According to the present invention, the stator winding is formed of a substantially U-shaped conductor in which one conductor is bent into a U-shape and the U-shaped leg portion has a substantially rectangular cross section. Therefore, the winding resistance of the stator winding is reduced, the copper loss of the armature winding is also reduced,
As the motor efficiency increases, the number of connecting points between the conductors decreases, and the reliability increases.
【図面の簡単な説明】[Brief description of drawings]
【図1】本発明の対象とする3相誘導電動機の断面図で
ある。
FIG. 1 is a sectional view of a three-phase induction motor to which the present invention is applied.
【図2】本発明の一実施例における固定子の断面図であ
る。
FIG. 2 is a sectional view of a stator according to an embodiment of the present invention.
【図3】本発明の対象とする3相誘導電動機の結線例で
ある。
FIG. 3 is a wiring example of a three-phase induction motor to which the present invention is applied.
【図4】図1に示す固定子巻線を構成する略U字形導体
の一例である。
4 is an example of a substantially U-shaped conductor forming the stator winding shown in FIG.
【図5】図2に示す固定子の拡大断面図である。5 is an enlarged cross-sectional view of the stator shown in FIG.
【図6】図5に示す略U字形導体挿入の展開平面図であ
る。
6 is a developed plan view of the insertion of the substantially U-shaped conductor shown in FIG.
【図7】図3に示すU相固定子巻線の接続例である。7 is a connection example of the U-phase stator winding shown in FIG.
【図8】図4に示す略U字形導体の他の例である。FIG. 8 is another example of the substantially U-shaped conductor shown in FIG.
【図9】丸線材を複数本並列に束ねて固定子巻線を構成
したときの固定子の断面図及び固定子巻線の概略図であ
る。
FIG. 9 is a cross-sectional view of a stator and a schematic view of the stator winding when a plurality of round wire rods are bundled in parallel to form a stator winding.
【図10】図9に示す固定子巻線部の拡大図である。10 is an enlarged view of a stator winding portion shown in FIG.
【図11】本発明の他の実施例における固定子巻線を実
現するための一例である。
FIG. 11 is an example for realizing a stator winding according to another embodiment of the present invention.
【図12】図11に示す固定子巻線を有する固定子の拡
大断面図である。
12 is an enlarged sectional view of a stator having the stator winding shown in FIG.
【図13】本発明のさらに他の実施例の固定子の拡大断
面図である。
FIG. 13 is an enlarged sectional view of a stator according to still another embodiment of the present invention.
【符号の説明】[Explanation of symbols]
1 3相誘導電動機 2 固定子 4 固定子鉄心 5 固定子巻線 5A 略U字形導体 5B 接続用導体 5a,5b 脚部部分 12 スロット 12a スロット開口部(スリット) 41 固定子鉄心 51 略U字形導体 51a,51b 脚部部分 1 3 Phase Induction Motor 2 Stator 4 Stator Iron Core 5 Stator Winding 5A Almost U-shaped Conductor 5B Connection Conductor 5a, 5b Leg Part 12 Slot 12a Slot Opening (Slit) 41 Stator Iron Core 51 Almost U-shaped Conductor 51a, 51b Leg part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 種田 幸記 神奈川県横浜市戸塚区吉田町292番地 株 式会社日立製作所生産技術研究所内 (72)発明者 渋川 末太郎 茨城県ひたちなか市大字高場2520番地 株 式会社日立製作所自動車機器事業部内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koki Taneda, 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Pref., Institute of Industrial Science, Hitachi, Ltd. Hitachi, Ltd. Automotive Equipment Division

Claims (7)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 径方向内側に開口した複数の開放型スロ
    ットを有する固定子鉄心と、前記固定子鉄心の各スロッ
    トに巻装された固定子巻線とを備えた3相電動機におい
    て、 前記固定子巻線を、1本の導体をU字形状に屈曲させか
    つU字の脚部部分を略矩形の断面形状とした略U字形導
    体で構成し、この略U字形導体の脚部部分を前記固定子
    鉄心の各スロットに軸方向より挿入し、前記脚部部分を
    異なるスロットに挿入された略U字形導体の脚部部分に
    接続用の導体を介して接続したことを特徴とする3相電
    動機。
    1. A three-phase electric motor comprising: a stator core having a plurality of open slots radially inwardly opening; and a stator winding wound around each slot of the stator core. The sub-winding is composed of a substantially U-shaped conductor in which one conductor is bent into a U-shape and the U-shaped leg portion has a substantially rectangular cross-sectional shape, and the leg portion of the substantially U-shaped conductor is described above. A three-phase electric motor characterized in that it is axially inserted into each slot of the stator core, and the leg portions are connected to the leg portions of the substantially U-shaped conductor inserted in different slots via connecting conductors. .
  2. 【請求項2】 径方向内側に開口しない複数のクローズ
    ド型スロットを有する固定子鉄心と、前記固定子鉄心の
    各スロットに巻装された固定子巻線とを備えた3相電動
    機において、 前記固定子巻線を、1本の導体をU字形状に屈曲させか
    つU字の脚部部分を略矩形の断面形状とした略U字形導
    体で構成し、この略U字形導体の脚部部分を前記固定子
    鉄心の各スロットに軸方向より挿入し、前記脚部部分を
    異なるスロットに挿入された略U字形導体の脚部部分に
    接続用の導体を介して接続したことを特徴とする3相電
    動機。
    2. A three-phase electric motor comprising: a stator core having a plurality of closed slots that do not open radially inward; and a stator winding wound around each slot of the stator core. The sub-winding is composed of a substantially U-shaped conductor in which one conductor is bent into a U-shape and the U-shaped leg portion has a substantially rectangular cross-sectional shape, and the leg portion of the substantially U-shaped conductor is described above. A three-phase electric motor characterized in that it is axially inserted into each slot of the stator core, and the leg portions are connected to the leg portions of the substantially U-shaped conductor inserted in different slots via connecting conductors. .
  3. 【請求項3】 請求項1記載の3相電動機において、前
    記略U字形導体の脚部部分の幅が前記開放型スロットの
    開口部のスリット幅より大きいことを特徴とする3相電
    動機。
    3. The three-phase electric motor according to claim 1, wherein the width of the leg portion of the substantially U-shaped conductor is larger than the slit width of the opening of the open type slot.
  4. 【請求項4】 請求項1または2記載の3相電動機にお
    いて、前記略U字形導体の脚部部分の幅が前記固定子鉄
    心の各スロットの径方向内側の幅にほぼ等しいことを特
    徴とする3相電動機。
    4. The three-phase electric motor according to claim 1 or 2, wherein the width of the leg portion of the substantially U-shaped conductor is substantially equal to the width of each slot of the stator core on the radially inner side. Three-phase electric motor.
  5. 【請求項5】 請求項1または2記載の3相電動機にお
    いて、前記略U字形導体の脚部部分は全て軸方向の同じ
    側から前記固定子鉄心の各スロットに挿入されているこ
    とを特徴とする3相電動機。
    5. The three-phase electric motor according to claim 1, wherein the leg portions of the substantially U-shaped conductor are all inserted into the slots of the stator core from the same side in the axial direction. A three-phase electric motor.
  6. 【請求項6】 請求項1または2記載の3相電動機にお
    いて、前記略U字形導体は1本の導体で1極1ターンの
    固定子巻線を構成しており、前記固定子鉄心の各スロッ
    トに異なる略U字形導体の2本の脚部部分が上下2層に
    配置されていることを特徴とする3相電動機。
    6. The three-phase electric motor according to claim 1 or 2, wherein the substantially U-shaped conductor constitutes a stator winding with one pole and one turn by one conductor, and each slot of the stator core. A three-phase electric motor in which two leg portions of different substantially U-shaped conductors are arranged in upper and lower two layers.
  7. 【請求項7】 請求項1または2記載の3相電動機にお
    いて、前記固定子鉄心の各スロットに異なる略U字形導
    体の複数本の脚部部分が上下複数層に配置されており、
    前記略U字形導体の各脚部部分の断面形状を、断面積が
    同じで各脚部部分が位置するスロット形状に適合した略
    台形としたことを特徴とする3相電動機。
    7. The three-phase electric motor according to claim 1 or 2, wherein a plurality of leg portions of different substantially U-shaped conductors are arranged in upper and lower layers in each slot of the stator core.
    A three-phase electric motor, wherein each leg portion of the substantially U-shaped conductor has a substantially trapezoidal cross-sectional shape suitable for a slot shape in which each leg portion is located with the same cross-sectional area.
JP812995A 1995-01-23 1995-01-23 3 phase motor Expired - Fee Related JP3474660B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP812995A JP3474660B2 (en) 1995-01-23 1995-01-23 3 phase motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP812995A JP3474660B2 (en) 1995-01-23 1995-01-23 3 phase motor

Publications (2)

Publication Number Publication Date
JPH08205441A true JPH08205441A (en) 1996-08-09
JP3474660B2 JP3474660B2 (en) 2003-12-08

Family

ID=11684686

Family Applications (1)

Application Number Title Priority Date Filing Date
JP812995A Expired - Fee Related JP3474660B2 (en) 1995-01-23 1995-01-23 3 phase motor

Country Status (1)

Country Link
JP (1) JP3474660B2 (en)

Cited By (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998054823A1 (en) * 1997-05-26 1998-12-03 Denso Corporation Ac generator for vehicle
EP0932246A2 (en) * 1998-01-23 1999-07-28 Kabushiki Kaisha Toshiba Permanent magnet type electrical rotating machine
US5952749A (en) * 1997-05-26 1999-09-14 Denso Corporation Cooling arrangement of alternator
US5965965A (en) * 1997-05-26 1999-10-12 Denso Corporation Stator winding arrangement of alternator for vehicle
US5982068A (en) * 1997-05-26 1999-11-09 Denso Corporation Stator arrangement of alternator for vehicle
US5986375A (en) * 1997-09-26 1999-11-16 Denso Corporation Alternator for vehicle
US5994813A (en) * 1997-05-26 1999-11-30 Denso Corporation Rotary electric machine
US6011332A (en) * 1997-05-26 2000-01-04 Denso Corporation Stator cooling arrangement of alternator for vehicle
EP0986160A2 (en) * 1998-09-07 2000-03-15 Denso Corporation AC Generator stator for vehicle
JP2000092801A (en) * 1998-07-15 2000-03-31 Denso Corp Alternator for vehicle and manufacture of stator used therefor
US6124660A (en) * 1997-05-26 2000-09-26 Denso Corporation AC generator for vehicles
US6137201A (en) * 1997-05-26 2000-10-24 Denso Corporation AC generator for vehicles
US6147430A (en) * 1998-05-25 2000-11-14 Denso Corporation Stator of AC generator for vehicle
AU729271B2 (en) * 1997-05-26 2001-02-01 Denso Corporation Alternator for an automotive vehicle
US6208060B1 (en) 1998-05-25 2001-03-27 Denso Corporation Stator of vehicle AC generator and method of manufacturing the same
US6242836B1 (en) 1998-06-26 2001-06-05 Denso Corporation Vehicle AC generators stator and method of manufacturing the same
JP2001231203A (en) * 2000-02-10 2001-08-24 Mitsubishi Electric Corp Ac generator for vehicle
US6335583B1 (en) 1998-05-25 2002-01-01 Denso Corporation Stator of vehicle AC generator and method of manufacturing the same
US6417592B2 (en) * 1999-12-09 2002-07-09 Denso Corporation Rotary electric machine for vehicle
US6425175B1 (en) 1999-03-31 2002-07-30 Denso Corporation Method of manufacturing a stator
EP1263117A2 (en) * 2001-05-21 2002-12-04 Reiner Binder Armature winding and manufacturing method thereof
US6604272B1 (en) 1998-11-02 2003-08-12 Denso Corporation Method of manufacturing a vehicle AC generator
US6703750B2 (en) 2000-04-27 2004-03-09 Denso Corporation Stator of rotary electric machine and method for making the same
US6710496B2 (en) 2000-10-16 2004-03-23 Mitsubishi Denki Kabushiki Kaisha Stator for an alternator and method of manufacturing the same
KR100493608B1 (en) * 2002-10-10 2005-06-10 미쓰비시덴키 가부시키가이샤 Stator for an automotive alternator and a method for manufacture thereof
KR100503657B1 (en) * 2001-02-20 2005-07-26 가부시키가이샤 덴소 Rotary electric machine
US6943477B1 (en) 2000-04-27 2005-09-13 Denso Corporation Stator of rotary electric machine and method for making the same
JP2006340409A (en) * 2005-05-31 2006-12-14 Denso Corp Rotary electric machine for vehicle
JP2008113539A (en) * 2006-10-03 2008-05-15 Denso Corp Ac rotary electric machine
EP2112744A1 (en) * 2008-04-24 2009-10-28 Magneti Marelli Holding S.p.A. Multiphase synchronous electrical machine for converting kinetic energy into electrical energy and electrical energy into kinetic energy onboard a transport vehicle, and transport vehicle provided with said electrical machine
WO2010023117A1 (en) * 2008-08-29 2010-03-04 Robert Bosch Gmbh Electric machine
US7830062B2 (en) 2006-12-12 2010-11-09 Nidec Corporation Motor having round and angular coils
CN102005844A (en) * 2009-08-28 2011-04-06 通用汽车环球科技运作公司 Insulation assembly for a stator core
JP2012186975A (en) * 2011-03-08 2012-09-27 Honda Motor Co Ltd Stator for rotary electric machine
JP2012186977A (en) * 2011-03-08 2012-09-27 Honda Motor Co Ltd Stator for rotary electric machine
JP2012186976A (en) * 2011-03-08 2012-09-27 Honda Motor Co Ltd Stator for rotary electric machine
WO2012147475A1 (en) * 2011-04-28 2012-11-01 アイシン・エィ・ダブリュ株式会社 Stator for rotating electric machine
JP2013132176A (en) * 2011-12-22 2013-07-04 Nissan Motor Co Ltd Stator and rotary electric machine
WO2014030214A1 (en) * 2012-08-21 2014-02-27 株式会社安川電機 Coil, rotating electrical machine, and method of manufacturing coil
CN104467231A (en) * 2014-12-12 2015-03-25 广东美芝制冷设备有限公司 Motor applied to rotary compressor and compressor with motor
US9018822B2 (en) 2011-03-08 2015-04-28 Honda Motor Co., Ltd. Stator for rotary electric machine
WO2015151615A1 (en) * 2014-03-31 2015-10-08 本田技研工業株式会社 Stator for rotary electric machine
CN105099110A (en) * 2014-05-08 2015-11-25 星都起重设备有限公司 Enhanced squirrel-cage pole changing motor and two speed hoist comprising the same
JP5901846B2 (en) * 2013-04-26 2016-04-13 三菱電機株式会社 Armature coil and manufacturing method thereof
JP2016226118A (en) * 2015-05-28 2016-12-28 日産自動車株式会社 Stator coil structure
JP2018019519A (en) * 2016-07-28 2018-02-01 東芝三菱電機産業システム株式会社 Induction motor and induction motor system
JP2018133988A (en) * 2017-02-16 2018-08-23 ドクター エンジニール ハー ツェー エフ ポルシェ アクチエンゲゼルシャフトDr. Ing. h.c. F. Porsche Aktiengesellschaft Coil segment for stator coil and method for manufacturing coil segment

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5105143B2 (en) * 2006-12-12 2012-12-19 日本電産株式会社 motor
US7723879B2 (en) 2006-12-12 2010-05-25 Nidec Corporation Motor having multiple busbar plates and wire for the same
EP3748814A1 (en) * 2019-06-07 2020-12-09 Siemens Aktiengesellschaft Stator for a rotating electric machine

Cited By (70)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6137201A (en) * 1997-05-26 2000-10-24 Denso Corporation AC generator for vehicles
US6459186B1 (en) 1997-05-26 2002-10-01 Denso Corporation AC generator for vehicles
CN1073299C (en) * 1997-05-26 2001-10-17 株式会社电装 Alternator for automotive vehicle
US5952749A (en) * 1997-05-26 1999-09-14 Denso Corporation Cooling arrangement of alternator
US5965965A (en) * 1997-05-26 1999-10-12 Denso Corporation Stator winding arrangement of alternator for vehicle
US5982068A (en) * 1997-05-26 1999-11-09 Denso Corporation Stator arrangement of alternator for vehicle
US6198190B1 (en) 1997-05-26 2001-03-06 Denso Corporation Alternator for an automotive vehicle
US5994813A (en) * 1997-05-26 1999-11-30 Denso Corporation Rotary electric machine
US5998903A (en) * 1997-05-26 1999-12-07 Denso Corporation Alternator for an automotive vehicle
US6011332A (en) * 1997-05-26 2000-01-04 Denso Corporation Stator cooling arrangement of alternator for vehicle
AU729271B2 (en) * 1997-05-26 2001-02-01 Denso Corporation Alternator for an automotive vehicle
US6144136A (en) * 1997-05-26 2000-11-07 Denso Corporation Stator arrangement of alternator for vehicle
US6124660A (en) * 1997-05-26 2000-09-26 Denso Corporation AC generator for vehicles
WO1998054823A1 (en) * 1997-05-26 1998-12-03 Denso Corporation Ac generator for vehicle
US5986375A (en) * 1997-09-26 1999-11-16 Denso Corporation Alternator for vehicle
JPH11215748A (en) * 1998-01-23 1999-08-06 Toshiba Corp Permanent magnet type rotating machine
EP0932246A3 (en) * 1998-01-23 2000-11-08 Kabushiki Kaisha Toshiba Permanent magnet type electrical rotating machine
US6265801B1 (en) 1998-01-23 2001-07-24 Kabushiki Kaisha Toshiba Permanent magnet type electrical rotating machine
EP0932246A2 (en) * 1998-01-23 1999-07-28 Kabushiki Kaisha Toshiba Permanent magnet type electrical rotating machine
US6335583B1 (en) 1998-05-25 2002-01-01 Denso Corporation Stator of vehicle AC generator and method of manufacturing the same
US6208060B1 (en) 1998-05-25 2001-03-27 Denso Corporation Stator of vehicle AC generator and method of manufacturing the same
US6147430A (en) * 1998-05-25 2000-11-14 Denso Corporation Stator of AC generator for vehicle
US6242836B1 (en) 1998-06-26 2001-06-05 Denso Corporation Vehicle AC generators stator and method of manufacturing the same
JP2000092801A (en) * 1998-07-15 2000-03-31 Denso Corp Alternator for vehicle and manufacture of stator used therefor
EP0986160A3 (en) * 1998-09-07 2001-03-14 Denso Corporation AC Generator stator for vehicle
EP0986160A2 (en) * 1998-09-07 2000-03-15 Denso Corporation AC Generator stator for vehicle
US6604272B1 (en) 1998-11-02 2003-08-12 Denso Corporation Method of manufacturing a vehicle AC generator
US6425175B1 (en) 1999-03-31 2002-07-30 Denso Corporation Method of manufacturing a stator
US6417592B2 (en) * 1999-12-09 2002-07-09 Denso Corporation Rotary electric machine for vehicle
JP2001231203A (en) * 2000-02-10 2001-08-24 Mitsubishi Electric Corp Ac generator for vehicle
EP1124305A3 (en) * 2000-02-10 2006-08-16 Mitsubishi Denki Kabushiki Kaisha Stator coil ends of an A.C. generator for vehicle
US7155805B2 (en) 2000-04-27 2007-01-02 Denso Corporation Method for making stator of rotary electric machine
US6703750B2 (en) 2000-04-27 2004-03-09 Denso Corporation Stator of rotary electric machine and method for making the same
US6943477B1 (en) 2000-04-27 2005-09-13 Denso Corporation Stator of rotary electric machine and method for making the same
US6710496B2 (en) 2000-10-16 2004-03-23 Mitsubishi Denki Kabushiki Kaisha Stator for an alternator and method of manufacturing the same
KR100503657B1 (en) * 2001-02-20 2005-07-26 가부시키가이샤 덴소 Rotary electric machine
EP1263117A3 (en) * 2001-05-21 2003-02-05 Reiner Binder Armature winding and manufacturing method thereof
EP1263117A2 (en) * 2001-05-21 2002-12-04 Reiner Binder Armature winding and manufacturing method thereof
KR100493608B1 (en) * 2002-10-10 2005-06-10 미쓰비시덴키 가부시키가이샤 Stator for an automotive alternator and a method for manufacture thereof
JP2006340409A (en) * 2005-05-31 2006-12-14 Denso Corp Rotary electric machine for vehicle
JP2008113539A (en) * 2006-10-03 2008-05-15 Denso Corp Ac rotary electric machine
US7830062B2 (en) 2006-12-12 2010-11-09 Nidec Corporation Motor having round and angular coils
EP2112744A1 (en) * 2008-04-24 2009-10-28 Magneti Marelli Holding S.p.A. Multiphase synchronous electrical machine for converting kinetic energy into electrical energy and electrical energy into kinetic energy onboard a transport vehicle, and transport vehicle provided with said electrical machine
WO2010023117A1 (en) * 2008-08-29 2010-03-04 Robert Bosch Gmbh Electric machine
CN102005844A (en) * 2009-08-28 2011-04-06 通用汽车环球科技运作公司 Insulation assembly for a stator core
JP2012186975A (en) * 2011-03-08 2012-09-27 Honda Motor Co Ltd Stator for rotary electric machine
JP2012186977A (en) * 2011-03-08 2012-09-27 Honda Motor Co Ltd Stator for rotary electric machine
JP2012186976A (en) * 2011-03-08 2012-09-27 Honda Motor Co Ltd Stator for rotary electric machine
US9018822B2 (en) 2011-03-08 2015-04-28 Honda Motor Co., Ltd. Stator for rotary electric machine
WO2012147475A1 (en) * 2011-04-28 2012-11-01 アイシン・エィ・ダブリュ株式会社 Stator for rotating electric machine
CN103404003A (en) * 2011-04-28 2013-11-20 爱信艾达株式会社 Stator for rotating electric machine
US9077216B2 (en) 2011-04-28 2015-07-07 Aisin Aw Co., Ltd. Stator for rotating electrical machine
JP2013132176A (en) * 2011-12-22 2013-07-04 Nissan Motor Co Ltd Stator and rotary electric machine
JP5904282B2 (en) * 2012-08-21 2016-04-13 株式会社安川電機 Coil, rotating electrical machine, and method of manufacturing coil
WO2014030359A1 (en) * 2012-08-21 2014-02-27 株式会社安川電機 Coil, rotating electrical machine, and method of manufacturing coil
WO2014030214A1 (en) * 2012-08-21 2014-02-27 株式会社安川電機 Coil, rotating electrical machine, and method of manufacturing coil
US9824806B2 (en) 2012-08-21 2017-11-21 Kabushiki Kaisha Yaskawa Denki Coil, rotating electrical machine, and method of manufacturing coil
US9960650B2 (en) 2013-04-26 2018-05-01 Mitsubishi Electric Corporation Armature coil and method of manufacturing the same
JP5901846B2 (en) * 2013-04-26 2016-04-13 三菱電機株式会社 Armature coil and manufacturing method thereof
US10644556B2 (en) 2013-04-26 2020-05-05 Mitsubishi Electric Corporation Method of manufacturing armature coil
CN106104976A (en) * 2014-03-31 2016-11-09 本田技研工业株式会社 The stator of electric rotating machine
JPWO2015151615A1 (en) * 2014-03-31 2017-04-13 本田技研工業株式会社 Rotating electric machine stator
WO2015151615A1 (en) * 2014-03-31 2015-10-08 本田技研工業株式会社 Stator for rotary electric machine
CN105099110A (en) * 2014-05-08 2015-11-25 星都起重设备有限公司 Enhanced squirrel-cage pole changing motor and two speed hoist comprising the same
CN104467231A (en) * 2014-12-12 2015-03-25 广东美芝制冷设备有限公司 Motor applied to rotary compressor and compressor with motor
JP2016226118A (en) * 2015-05-28 2016-12-28 日産自動車株式会社 Stator coil structure
JP2018019519A (en) * 2016-07-28 2018-02-01 東芝三菱電機産業システム株式会社 Induction motor and induction motor system
JP2018133988A (en) * 2017-02-16 2018-08-23 ドクター エンジニール ハー ツェー エフ ポルシェ アクチエンゲゼルシャフトDr. Ing. h.c. F. Porsche Aktiengesellschaft Coil segment for stator coil and method for manufacturing coil segment
CN108448771A (en) * 2017-02-16 2018-08-24 保时捷股份公司 The method of coil segment and manufacture coil segment for stator coil
US10742100B2 (en) 2017-02-16 2020-08-11 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Coil segment for a stator coil and method for manufacturing a coil

Also Published As

Publication number Publication date
JP3474660B2 (en) 2003-12-08

Similar Documents

Publication Publication Date Title
US7944112B2 (en) Method of making integrated stator, brushless direct-current motor of radial core type double rotor structure using the integrated stator, and method of making the same
US7821175B2 (en) Stator assembly for an electric machine and method of manufacturing the same
JP3756516B2 (en) Conductor for stator frame of multi-phase power generator
US4117360A (en) Self-supporting amortisseur cage for high-speed synchronous machine solid rotor
US6335583B1 (en) Stator of vehicle AC generator and method of manufacturing the same
CA2231123C (en) Alternator for an automotive vehicle
EP0881747B1 (en) Alternator for vehicle
EP0225132B1 (en) Stator for electrical machine
EP1316136B1 (en) Dc- or ac-commutator motors with concentrated windings
KR100473101B1 (en) Automotive alternator
EP0961386B1 (en) Stator of ac generator for vehicle
CA2337042C (en) Stator with teeth formed from a soft magnetic powder material
US6998749B2 (en) Rotary electric machine
EP1233499B1 (en) Rotary electric machine
US6201332B1 (en) AC generator stator for vehicle
JP4772503B2 (en) Three-phase synchronous machine including a permanent magnet type rotor having a squirrel-cage induction winding conductor, a traction drive device, and a production machine device
EP0967709B1 (en) Vehicle ac generator's stator and method of manufacturing the same
US5281879A (en) Synchronous motor with two permanent magnet rotor portions
JP5070248B2 (en) Rotating electric machine and manufacturing method thereof
US6806612B2 (en) Armature coil for slotless rotary electric machinery
US6169350B1 (en) Electrical machine magnetic circuit structure in which pole-to-rotor air clearances vary asymmetrically to provide a more uniform flux distribution
US4371802A (en) Half-pitch capacitor induction motor
US6208060B1 (en) Stator of vehicle AC generator and method of manufacturing the same
US4426771A (en) Method of fabricating a stator for a multiple-pole dynamoelectric machine
US4520287A (en) Stator for a multiple-pole dynamoelectric machine and method of fabricating same

Legal Events

Date Code Title Description
FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20070919

Year of fee payment: 4

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080919

Year of fee payment: 5

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080919

Year of fee payment: 5

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090919

Year of fee payment: 6

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090919

Year of fee payment: 6

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100919

Year of fee payment: 7

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313111

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100919

Year of fee payment: 7

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100919

Year of fee payment: 7

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100919

Year of fee payment: 7

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110919

Year of fee payment: 8

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120919

Year of fee payment: 9

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120919

Year of fee payment: 9

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130919

Year of fee payment: 10

LAPS Cancellation because of no payment of annual fees