JP2574490B2 - Cage rotor - Google Patents
Cage rotorInfo
- Publication number
- JP2574490B2 JP2574490B2 JP1335662A JP33566289A JP2574490B2 JP 2574490 B2 JP2574490 B2 JP 2574490B2 JP 1335662 A JP1335662 A JP 1335662A JP 33566289 A JP33566289 A JP 33566289A JP 2574490 B2 JP2574490 B2 JP 2574490B2
- Authority
- JP
- Japan
- Prior art keywords
- slot
- cage rotor
- thin iron
- blocks
- iron plate
- 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.)
- Expired - Fee Related
Links
Landscapes
- Induction Machinery (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は誘導電動機のかご形回転子に係わり、特にア
ルミニュウムダイカストされるかご形回転子に関するも
のである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cage rotor of an induction motor, and more particularly to a cage rotor of aluminum die-cast.
従来の技術 従来この種のかご形回転子を第６図〜第８図にもとづ
き説明する。円形の薄鉄板51の外周に、第６図に示すよ
うに同一形状の複数個のスロット52と歯部56を設けてこ
れを積層し、第７図に示すようにスロット52内に導体53
と両端面にリング状のエンドリング54とをアルミニュウ
ムダイカストし、かご形巻線を形成して構成されてい
た。またアルミニュウムダイカストされるスロット52が
傾斜して積層されるようにスキューを設けることが一般
的であった。2. Description of the Related Art A conventional cage rotor of this type will be described with reference to FIGS. A plurality of slots 52 and teeth 56 of the same shape are provided on the outer periphery of a circular thin iron plate 51 as shown in FIG. 6 and laminated, and a conductor 53 is placed in the slots 52 as shown in FIG.
And a ring-shaped end ring 54 on both end surfaces thereof, which was formed by aluminum die casting to form a cage winding. Further, it is common to provide a skew so that the slots 52 to be die-cast with aluminum are stacked at an angle.
発明が解決しようとする課題 ところで、スキューを設けないかご形回転子を有する
誘導電動機は、始動時および運転時に、固定子のスロッ
ト数と回転子のスロット数との組合わせによる高調波に
より異常トルクや振動，騒音が発生する課題があった。
そこでこれらの課題を改良するためにスキューを設けて
いるが、その反面、スロット52内のアルミニュウムの導
体53間に横流損を発生することになり、誘導電動機の効
率を低下させるという課題があった。また、この横流損
は温度上昇の原因ともなっていた。Problems to be Solved by the Invention By the way, the induction motor having the cage rotor without the skew, when starting and operating, causes abnormal torque due to harmonics caused by a combination of the number of slots of the stator and the number of slots of the rotor. And vibration and noise.
Therefore, skew is provided in order to improve these problems, but on the other hand, a cross flow loss occurs between the aluminum conductors 53 in the slots 52, and there is a problem that the efficiency of the induction motor is reduced. . In addition, this cross flow loss also caused a rise in temperature.
本発明はこのような課題を解決するもので、スキュー
を設けることなしに、スキューを設けたと同様に誘導電
動機の始動および運転時に異常トルクや振動，騒音が発
生しない良好な特性を得ることができ、また、スキュー
を設けないことにより横流損を少なくし、効率の良い安
価なかご形回転子を提供することを目的とするものであ
る。The present invention solves such a problem, and it is possible to obtain good characteristics in which no abnormal torque, vibration, and noise are generated at the time of starting and operating an induction motor, similarly to the case where the skew is provided, without providing the skew. It is another object of the present invention to provide an efficient and inexpensive cage rotor by reducing cross flow loss by not providing a skew.
課題を解決するための手段 この課題を解決するために本発明は、円形の薄鉄板の
外周に、等間隔に中心線を有し、先端部の幅が交互に大
幅と小幅に形成されるように、前記中心線を対称軸とし
て等距離に開口部を設け形成される複数の歯部と、この
歯部間に前記開口部と連通し設けられるスロットと、こ
のスロットが垂直となるように前記薄鉄板を一定の積厚
に積層して形成した複数のブロックとを備え、前記複数
のブロックを、大幅と小幅の前記歯部が対向するよう
に、同方向に１スロットずつずらして重ね合わせたかご
形回転子の構成としたものである。Means for Solving the Problems In order to solve this problem, the present invention has a circular thin iron plate having a center line at an equal interval on an outer periphery thereof, and a width of a tip portion is alternately formed to be significantly small. A plurality of teeth formed by providing openings at equal distances with the center line as a symmetry axis, a slot provided between the teeth and communicating with the opening, and the slot being perpendicular to the slot. A plurality of blocks formed by laminating thin iron plates to a certain thickness, wherein the plurality of blocks are overlapped with each other shifted by one slot in the same direction so that the tooth portions having a large width and a small width face each other. This is a configuration of a cage rotor.
作用 この構成により、かご形回転子には実際にスキューを
設けなくても、見かけ上のスキューが設けられたことと
なるので、誘導電動機の始動時および運転時に異常トル
クや振動，騒音が発生しなくなり、また、運転効率が向
上することとなる。Operation With this configuration, apparent skew is provided without actually providing skew in the squirrel-cage rotor. Therefore, abnormal torque, vibration, and noise are generated when the induction motor is started and operated. And the operating efficiency is improved.
実 施 例 以下、本発明の一実施例を第１図から第５図にもとづ
き説明する。第１図に示すように、円形の薄鉄板１の外
周に等間隔に中心線を有する歯部２を、先端部の幅が交
互に大幅と小幅を形成するように、かつ前記中心線を対
称軸として等距離に開口部３を有するスロット４が形成
されるように設けている。この薄鉄板１を積層して積層
鉄心５とする際、第２図に示すように、スロット４が垂
直になるように積層した同一積厚の２個のブロック6,7
を形成し、このブロック6,7を大幅と小幅の歯部２が対
向するように１スロットずらして重ね合わせる。積層鉄
心５の状態にするとブロック6,7のスロット４の底部８
は軸方向の同一直線上に位置する。このようにすると、
両ブロック6,7のスロット４は、軸方向から見た場合、
第３図および第４図に示すように底部８は一致している
が、それより上部は左右に振り分けられ、磁束はφ１と
φ２の磁路を通ることになり、かつ、両ブロック6,7の
積厚が等しいから、これは、第２図に示すように見かけ
上、角度θのスキューを持ったことと等価になるので、
誘導電動機の始動時および運転時に異常トルクや、振
動，騒音の発生を防止し、また運転時の横流による損失
も防止することができる。第５図に示す本実施例の騒音
の周波数分析と、第８図に示す従来の構成による騒音の
周波数分析とを比較すると明かなように、異常騒音とな
っていたピーク音a,b,cが実施例ではなくなっている。
なお、スロット４内の導体９のエンドリング10は従来と
同様にアルミニュウムダイカストにより形成されてい
る。また本発明のかご形回転子11は、三相誘導電動機，
単相誘導電動機のいずれにも適用でき、かつ薄鉄板１を
積層したブロック数は３個以上でもよい等、上記で説明
し、かつ図面に示した実施例にのみに限定されるもので
はなく、その要旨を逸脱しない範囲で種々変形して実施
できるものである。Embodiment An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, a toothed portion 2 having a center line at equal intervals on the outer periphery of a circular thin iron plate 1 is formed so that the width of the tip part alternately forms a large width and a small width, and the center line is symmetrical. A slot 4 having an opening 3 equidistant as an axis is provided. When the thin iron plates 1 are laminated to form a laminated iron core 5, as shown in FIG. 2, two blocks 6, 7 having the same thickness and stacked so that the slots 4 are vertical.
Are formed, and the blocks 6 and 7 are overlapped with each other by shifting one slot so that the tooth portions 2 having a large width and a small width face each other. When the laminated core 5 is in the state, the bottom 8 of the slot 4 of the blocks 6 and 7
Are located on the same straight line in the axial direction. This way,
When viewed from the axial direction, the slot 4 of both blocks 6 and 7
As shown in FIG. 3 and FIG. 4, the bottom portion 8 is coincident, but the upper portion is divided right and left, and the magnetic flux passes through the magnetic paths of φ1 and φ2. This is apparently equivalent to having a skew of the angle θ as shown in FIG.
It is possible to prevent the occurrence of abnormal torque, vibration and noise when starting and operating the induction motor, and also to prevent the loss due to cross current during operation. When the frequency analysis of the noise of the present embodiment shown in FIG. 5 is compared with the frequency analysis of the noise according to the conventional configuration shown in FIG. 8, the peak sounds a, b, and c, which are abnormal noises, are clear. Is no longer an example.
The end ring 10 of the conductor 9 in the slot 4 is formed by aluminum die casting as in the conventional case. Further, the cage rotor 11 of the present invention includes a three-phase induction motor,
The present invention can be applied to any single-phase induction motor, and the number of blocks in which the thin iron plates 1 are laminated may be three or more. The present invention is not limited to only the embodiment described above and shown in the drawings. Various modifications can be made without departing from the scope of the invention.
発明の効果 以上の実施例の説明から明かなように本発明によれ
ば、かご形回転子に、実際にはスキューを設けることな
く、等価的にスキューを設けたことになり、誘導電動機
の始動時および運転時に異常トルクや振動，騒音が発生
しない良好な特性となる効果が得られる。またスキュー
を設けないことにより、横流損も少なくなり、効率の良
好な特性となる効果が得られる。また、回転子歯に対す
る磁束の流れ込みが各歯の中心線に対し略対称かつスム
ーズであるため回転が滑らかであり、回転の方向が変化
しても得られる効果に差違を生じない。According to the present invention, as is apparent from the above description of the embodiment, skew is equivalently provided in the cage rotor without actually providing skew, and starting of the induction motor is started. This provides an effect of obtaining good characteristics without abnormal torque, vibration and noise during operation and operation. In addition, by not providing the skew, the cross flow loss is reduced, and the effect that the characteristics are excellent can be obtained. In addition, since the flow of the magnetic flux into the rotor teeth is substantially symmetrical and smooth with respect to the center line of each tooth, the rotation is smooth, and there is no difference in the effect obtained even if the direction of rotation changes.
第１図は本発明の一実施例のかご形回転子を構成する薄
鉄板を示す平面図、第２図は同薄鉄板を積層して構成し
たかご形回転子の正面図、第３図は同薄鉄板の一方の積
層ブロックの１スロットに流れる磁束方向の説明図、第
４図は第３図の１スロットに対向する他方の積層ブロッ
クの１スロットに流れる磁束方向の説明図、第５図は同
かご形回転子を組み込んだ誘導電動機の騒音の周波数分
析を示す説明図、第６図は従来のかご形回転子を構成す
る薄鉄板の平面図、第７図は同薄鉄板を積層して構成し
たかご形回転子の正面図、第８図は同かご形回転子を組
み込んだ誘導電動機の騒音の周波数分析を示す図であ
る。 １……薄鉄板、２……歯部、３……開口部、４……スロ
ット、6,7……ブロック、11……かご形回転子。FIG. 1 is a plan view showing a thin iron plate constituting a cage rotor of one embodiment of the present invention, FIG. 2 is a front view of a cage rotor formed by laminating the thin iron plates, and FIG. FIG. 4 is an explanatory view of a direction of a magnetic flux flowing in one slot of one laminated block of the thin iron plate, FIG. 4 is an explanatory view of a direction of a magnetic flux flowing in one slot of the other laminated block opposed to one slot of FIG. 3, and FIG. Is an explanatory view showing a frequency analysis of noise of an induction motor incorporating the same cage rotor, FIG. 6 is a plan view of a thin iron plate constituting a conventional cage rotor, and FIG. FIG. 8 is a front view of the squirrel-cage rotor configured as described above, and FIG. 8 is a diagram showing a frequency analysis of noise of an induction motor incorporating the squirrel-cage rotor. 1 ... thin iron plate, 2 ... teeth, 3 ... opening, 4 ... slot, 6, 7 ... block, 11 ... cage rotor.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭52−20204（ＪＰ，Ａ) 特開 昭64−34151（ＪＰ，Ａ) 実開 昭49−26902（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-52-20204 (JP, A) JP-A-64-34151 (JP, A)
Claims (1)
有し、先端部の幅が交互に大幅と小幅に形成されるよう
に、前記中心線を対称軸として等距離に開口部を設け形
成される複数の歯部と、この歯部間に前記開口部と連通
し設けられるスロットと、このスロットが垂直となるよ
うに前記薄鉄板を一定の積厚に積層して形成した複数の
ブロックとを備え、前記複数のブロックを、大幅と小幅
の前記歯部が対向するように、同方向に１スロットずつ
ずらして重ね合わせたかご形回転子。1. A circular thin iron plate has center lines at equal intervals on the outer periphery thereof, and openings are formed at equal distances with the center line as a symmetry axis so that the width of a tip portion is formed alternately and significantly smaller. A plurality of teeth provided with a portion, a slot provided between the teeth and communicating with the opening, and the thin iron plate were laminated with a constant thickness so that the slot was vertical. A cage rotor comprising a plurality of blocks, wherein the plurality of blocks are overlapped by being shifted by one slot in the same direction so that the tooth portions having a large width and a small width face each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1335662A JP2574490B2 (en) | 1989-12-25 | 1989-12-25 | Cage rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1335662A JP2574490B2 (en) | 1989-12-25 | 1989-12-25 | Cage rotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03198641A JPH03198641A (en) | 1991-08-29 |
| JP2574490B2 true JP2574490B2 (en) | 1997-01-22 |
Family
ID=18291114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1335662A Expired - Fee Related JP2574490B2 (en) | 1989-12-25 | 1989-12-25 | Cage rotor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2574490B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015033304A (en) * | 2013-08-07 | 2015-02-16 | 日産自動車株式会社 | Electric motor |
| JP2016036193A (en) * | 2014-08-01 | 2016-03-17 | 株式会社日立製作所 | Induction motor |
| DE102019214076B3 (en) * | 2019-09-16 | 2020-11-12 | Magna powertrain gmbh & co kg | Electric machine for a motor vehicle |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5217045Y2 (en) * | 1972-06-10 | 1977-04-18 | ||
| JPS5220204A (en) * | 1975-08-08 | 1977-02-16 | Hitachi Ltd | Core of revolving electric machine |
| JPS6434151A (en) * | 1987-07-27 | 1989-02-03 | Matsushita Seiko Kk | Stator for capacitor motor |
-
1989
- 1989-12-25 JP JP1335662A patent/JP2574490B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03198641A (en) | 1991-08-29 |
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