JP2987880B2 - motor - Google Patents
motorInfo
- Publication number
- JP2987880B2 JP2987880B2 JP2133344A JP13334490A JP2987880B2 JP 2987880 B2 JP2987880 B2 JP 2987880B2 JP 2133344 A JP2133344 A JP 2133344A JP 13334490 A JP13334490 A JP 13334490A JP 2987880 B2 JP2987880 B2 JP 2987880B2
- Authority
- JP
- Japan
- Prior art keywords
- end ring
- resin member
- reinforced resin
- rotating shaft
- fiber
- 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
- 239000011347 resin Substances 0.000 claims description 20
- 229920005989 resin Polymers 0.000 claims description 20
- 238000004804 winding Methods 0.000 claims description 11
- 239000004020 conductor Substances 0.000 claims description 7
- 230000014509 gene expression Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 description 26
- 239000000835 fiber Substances 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 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
- 238000005452 bending Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Induction Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は回転子の端絡環に補強を施したモータに関す
るものである。Description: TECHNICAL FIELD The present invention relates to a motor in which an end ring of a rotor is reinforced.
従来の技術 近年、動力用モータは回転数を上昇させ例えば工作機
械主軸に使用する場合は加工速度を上昇させて加工能率
を上げる等の高速化が望まれている、数万rpmあるいは
数十万rpmという高速化を図るためには、回転子の遠心
破壊を防止する手段が要求される。2. Description of the Related Art In recent years, power motors have been required to have a higher rotational speed, for example, when used for a machine tool main spindle, a higher speed such as a higher machining speed and a higher machining efficiency. In order to increase the speed to rpm, a means for preventing centrifugal destruction of the rotor is required.
以下図面を参照しながら、従来のモータの一例につい
て説明する。Hereinafter, an example of a conventional motor will be described with reference to the drawings.
第３図は従来のモータの横断面図と側面図を示すもの
である。１は筒状のフレームで、内部に固定子鉄心２を
嵌着している。３は固定子巻線である。回転子は回転子
鉄心４と端絡環５と導体棒６とからなっている。回転子
鉄心４は回転軸７に嵌合されており、端絡環５は回転子
鉄心４の両端に導体棒６を介して固定されており、かつ
回転軸７に嵌合されている。FIG. 3 shows a cross-sectional view and a side view of a conventional motor. Reference numeral 1 denotes a cylindrical frame into which a stator core 2 is fitted. 3 is a stator winding. The rotor includes a rotor core 4, an end ring 5, and a conductor rod 6. The rotor core 4 is fitted to the rotating shaft 7, and the end rings 5 are fixed to both ends of the rotor core 4 via the conductor rods 6 and fitted to the rotating shaft 7.
以上のように構成されたモータにおいて、高速回転時
には回転子に大きな遠心力が働く。回転子鉄心４にはケ
イ阻鋼板等を積層構造にして用いることが多いが、端絡
環５および導体棒６には導電率の高い銅やアルミニウム
あるいはその合金が使用される。したがって、遠心力に
よってまず破壊が起こるのは強度の小さい端絡環の部分
である。In the motor configured as described above, a large centrifugal force acts on the rotor during high-speed rotation. In many cases, the rotor core 4 is formed of a laminated structure made of a silicon steel sheet or the like, while the end ring 5 and the conductor bar 6 are made of copper, aluminum, or an alloy thereof having high conductivity. Therefore, it is the portion of the end ring having a small strength that the first breakage occurs due to the centrifugal force.
発明が解決しようとする課題 しかしながら、上記のような構成では、遠心力を抑制
し回転子の遠心破壊を防止するためには、回転子直径を
小さくするしかなく、所望のトルク特性を確保するには
モータ（回転子と固定子）のスラスト方向寸法を大きく
する必要がある。しかし、モータのスラスト方向寸法を
大きくすれば回転軸全長も永くなり、回転軸の曲げ固有
振動数つまり危険速度が低くなって結果的に高速回転が
不可能となるという問題点を有していた。However, in the above configuration, in order to suppress the centrifugal force and prevent centrifugal breakage of the rotor, the rotor diameter must be reduced, and the desired torque characteristics must be secured. It is necessary to increase the size of the motor (rotor and stator) in the thrust direction. However, if the size in the thrust direction of the motor is increased, the total length of the rotating shaft becomes longer, and the bending natural frequency of the rotating shaft, that is, the critical speed becomes lower, so that high-speed rotation becomes impossible. .
本発明は上記問題点に鑑み、遠心力に対する強度を向
上させた回転子を有するモータを提供するものである。The present invention has been made in view of the above problems, and provides a motor having a rotor with improved strength against centrifugal force.
課題を解決するための手段 上記問題点を解決するために本発明のモータは、回転
軸に嵌合された回転子鉄心と、回転軸に嵌合されかつ複
数の導体棒で互いに連結されかつ回転子鉄心の両端に配
置固定された端絡環と、端絡環の外周部に所定の張力で
巻かれて成型された繊維強化樹脂部材とを備え、この繊
維強化樹脂部材の初期巻付け張力を、回転軸と端絡環と
の間および端絡環と繊維強化樹脂部材との間にモータ回
転時にすべりが生じない下記（１），（２）式の条件を
満たし、かつ、端絡環と繊維強化樹脂部材がモータ回転
時に破壊しない下記（３），（４）式の条件を満たすよ
うに設定したことを特徴とするモータ。Means for Solving the Problems In order to solve the above problems, a motor according to the present invention comprises a rotor core fitted to a rotating shaft, a rotor core fitted to the rotating shaft and connected to each other by a plurality of conductor rods, and An end winding ring disposed and fixed at both ends of the iron core, and a fiber reinforced resin member formed by being wound around the outer periphery of the end ring with a predetermined tension, and the initial winding tension of the fiber reinforced resin member is reduced. Satisfies the conditions of the following formulas (1) and (2) in which no slip occurs between the rotating shaft and the end ring and between the end ring and the fiber-reinforced resin member when the motor rotates. A motor characterized in that the fiber reinforced resin member is set so as to satisfy the conditions of the following equations (3) and (4) so as not to be broken when the motor rotates.
作用 本発明は上記した構成によって、端絡環外周部に所定
の張力で巻付けられて成型された繊維強化樹脂部材が端
絡環を圧縮しているので、遠心力による端絡環の引張応
力を緩和させることができる。したがって、同じ直径の
回転子でもより高速回転が可能となる。 Effect of the Invention According to the present invention, since the fiber reinforced resin member formed by being wound around the outer periphery of the end ring with a predetermined tension and compressing the end ring, the tensile stress of the end ring due to centrifugal force is obtained. Can be alleviated. Therefore, high-speed rotation is possible even with a rotor having the same diameter.
実 施 例 以下本発明の一実施例のモータについて図面を参照し
ながら説明する。Embodiment Hereinafter, a motor according to an embodiment of the present invention will be described with reference to the drawings.
第１図は本発明の実施例におけるモータの横断面図お
よび側面図を示すものである。11は筒状のフレームで、
内部に固定子鉄心12を嵌着している。13は固定子巻線で
ある。回転子鉄心14は回転軸15に嵌合されており、端絡
環16は回転子鉄心14の両端に導体棒17を介して固定され
ており、かつ回転軸15に嵌合されている。前記強化樹脂
部材18は、回転子全体を回転軸15に嵌合したのち、端絡
環16の外周部に所定の張力で巻き付けて成型したもので
ある。この初期巻付け張力は、回転軸15と端絡環16およ
び端絡環16と繊維強度樹脂部材18が高速回転時にすべり
を生じない第一の条件と、端絡環16と繊維強化樹脂部材
18が高速回転時に破壊しない第二の条件とから決定され
ている。FIG. 1 shows a cross-sectional view and a side view of a motor according to an embodiment of the present invention. 11 is a cylindrical frame,
A stator core 12 is fitted inside. 13 is a stator winding. The rotor core 14 is fitted to the rotating shaft 15, and the end rings 16 are fixed to both ends of the rotor core 14 via conductor rods 17 and fitted to the rotating shaft 15. The reinforced resin member 18 is formed by fitting the entire rotor to the rotating shaft 15 and then winding the outer periphery of the end ring 16 with a predetermined tension. The initial winding tension is controlled by the first condition under which the rotating shaft 15, the end ring 16 and the end ring 16 and the fiber-strength resin member 18 do not slip when rotating at a high speed.
18 is determined from the second condition that does not break at high speed rotation.
以上のように本実施例によれば上記第一，第二の条件
を満足するように繊維強化樹脂部材に張力を与えている
ので、端絡環の引張応力が緩和され、遠心破壊が抑制で
きる。As described above, according to the present embodiment, the tension is applied to the fiber reinforced resin member so as to satisfy the first and second conditions, so that the tensile stress of the end ring is reduced, and centrifugal fracture can be suppressed. .
次に、繊維強化樹脂部材の巻付け張力を決定する上記
第一条件と第二条件について説明する。Next, the first and second conditions for determining the winding tension of the fiber reinforced resin member will be described.
第２図は回転軸（Ａ材），端絡環（Ｂ材），繊維強化
樹脂部材（Ｃ材）のモデルおよび記号を示すものであ
る。また、第１表は以下の説明に用いる記号を示す表で
ある。FIG. 2 shows models and symbols of a rotating shaft (A material), an end ring (B material), and a fiber reinforced resin member (C material). Table 1 is a table showing symbols used in the following description.
A,B材はしめしろδで嵌合されている。また、Ｃ材は
A,B材を嵌合した後、張力ＴでＢ材の外周上に巻かれて
いる。 Materials A and B are fitted with interference δ. Also, C material is
After fitting the A and B materials, they are wound on the outer periphery of the B material with a tension T.
最初に、Ｃ材をしめしろδ′でＢ材と嵌合した場合の
応力状態が、Ｃ材を張力ＴでＢ材上に巻き付けた場合の
応力状態とほぼ等価となると考えていく。First, it is assumed that the stress state when the C material is fitted to the B material with the interference δ ′ is almost equivalent to the stress state when the C material is wound around the B material with the tension T.
Ｃ材を張力ＴでＢ材上に巻き付けた場合の応力状態
は、Ｃ材の厚みｈ（＝r3−r2）が小さければ である。応力が０の状態から半径方向の変位は、 である。したがって、ｃ材がしめしろδ′、つまり となるように、Ｂ材と嵌合されれば、Ｃ材を張力ＴでＢ
材上に巻き付けた場合の応力状態とほぼ同等となる。The stress state when the C material is wound around the B material with the tension T is as follows if the thickness h (= r 3 −r 2 ) of the C material is small. It is. From the state of zero stress, the radial displacement is It is. Therefore, c is the interference δ ', that is, When the material C is fitted to the material B so that
It is almost the same as the stress state when wound on a material.
よって、以降では、A,B材をしめしろδで嵌合した
後、その上にＣ材がしめしろδ′で嵌合されているとし
て説明を進める。Therefore, hereinafter, it is assumed that the materials A and B are fitted with the interference δ and the material C is fitted thereon with the interference δ ′.
一般的に、厚さ一様な中空円板が、それに垂直な対称
軸のまわりに角速度ωで回転しているとき、その応力・
変位状態は次式で表わされる。In general, when a hollow circular disk with a uniform thickness rotates at an angular velocity ω about an axis of symmetry perpendicular to it, the stress
The displacement state is represented by the following equation.
中空回転円板に内圧ｐα，外圧ｐβが働いていると考
えると、（４）式において、 ｒ＝ｒαでσｒ＝−ｐα ｒ＝ｒβでσｒ＝−ｐβ （内径ｒα，外径ｒβの中空円板） を代入すれば、積分定数a,bが以下のように求められ
る。 Pressure p alpha hollow rotary disk, considering that the external pressure p beta is working, in (4), at r = r α σ r = -p α r = r β in sigma r = -p beta (inner diameter substituting r α and a hollow disk having an outer diameter r β ), the integration constants a and b are obtained as follows.
（８），（９）式を（４），（５），（６）式に代入
すれば、 となる。（10），（11），（12）式をもとにして、第２
図に示したモデルの状態を明らかにする。 By substituting equations (8) and (9) into equations (4), (5) and (6), Becomes Based on equations (10), (11) and (12), the second
The state of the model shown in the figure will be clarified.
第２図に示したように、回転角速度ωで回転してお
り、A,B材間の相互圧力p1,B,C材間の相互圧力p2が働い
ているとき、まずＡ材のｒ＝r1での変位量δ１を求め
る。（12）式を用いる。As shown in FIG. 2, when rotating at the rotational angular velocity ω and the mutual pressure p 1 between the A and B materials and the mutual pressure p 2 between the B and C materials are acting, first, the r of the A material = obtaining the displacement amount [delta] 1 in r 1. Use equation (12).
Ｂ材のｒ＝r1での変位量δ２を求める。 Obtaining a displacement amount [delta] 2 at r = r 1 of B material.
次にＢ材のｒ＝r2での変位量δ２′を求める。 Next, the displacement δ 2 ′ of the B material at r = r 2 is determined.
さらに、Ｃ材のｒ＝r2での変位量δ３を求める。 Further, the displacement δ 3 of the C material at r = r 2 is obtained.
いま、A,B間のしめしろがδであることから、 である。 Now, since the interference between A and B is δ, It is.
B,C間には（３）式で表わされるしめしろδ′がある
と考えると、 である。Assuming that there is an interference δ 'between B and C expressed by equation (3), It is.
（13），（14），（17）式より、 （３），（15），（16），（18）式より 上記の（19），（20）式は未知数P1,P2に関する連立
方程式である。この連立方程式の解を、 p1＝p1 ＊ p2＝p2 ＊ とする。From equations (13), (14), and (17), From equations (3), (15), (16) and (18) Equations (19) and (20) above are simultaneous equations for unknowns P 1 and P 2 . The solution of this system of equations, and p 1 = p 1 * p 2 = p 2 *.
A,B,C部材が互にすべらない第一の条件は、 である。The first condition that A, B, C members do not slip each other is It is.
また、B,C材が破壊しない第二の条件は、 が成立することである。The second condition that the B and C materials do not break is Is true.
したがって実際には、巻き付け張力Ｔをはじめに仮定
し、Ｔの値を（20）式に代入して、連立方程式（19,（2
0）式を解P1 ＊,p2 ＊を求める。次にその解p1 ＊,p2 ＊を
用いて、（21）式で表わされる第一の条件と（22）式で
表わされる第２の条件が満たされるかどうか判定する。
もし満たされなければ、張力Ｔの値を変更して上記計算
を繰り返す。以上のように決定された巻き付け張力Ｔで
繊維強化樹脂部材が巻かれていれば、遠心力に対する強
度を向上させた回転子を有するモータを提供できる。Therefore, in practice, the winding tension T is assumed first, and the value of T is substituted into the equation (20) to obtain the simultaneous equations (19, (2)
0) Find the solutions P 1 * and p 2 * by solving the equation. Next, using the solutions p 1 * and p 2 * , it is determined whether the first condition represented by the expression (21) and the second condition represented by the expression (22) are satisfied.
If not, the value of the tension T is changed and the above calculation is repeated. If the fiber reinforced resin member is wound with the winding tension T determined as described above, a motor having a rotor with improved strength against centrifugal force can be provided.
発明の効果 以上のように本発明は端絡環の外周部に所定の張力で
巻かれて成型された繊維強化樹脂部とを備え、この繊維
強化樹脂部材の初期巻付け張力を、回転軸と端絡環およ
び端絡環と繊維強化樹脂部材がモータ回転時にすべりを
生じない第一の条件と、端絡環と繊維強化樹脂部材がモ
ータ回転時に破壊しない第二の条件とから決定している
ので、遠心力に対する強度をより確実に向上させること
ができるとともに、端絡環が回転軸に嵌合された構成と
なっているため、回転軸と端絡環の間のすべりがより生
じにくくなる。Effect of the Invention As described above, the present invention includes a fiber-reinforced resin portion formed by being wound with a predetermined tension on the outer peripheral portion of the end ring, and the initial winding tension of the fiber-reinforced resin member, It is determined from the first condition that the end ring and the end ring and the fiber-reinforced resin member do not slip when the motor rotates, and the second condition that the end ring and the fiber-reinforced resin member do not break during the motor rotation. Therefore, the strength against centrifugal force can be more reliably improved, and since the end ring is configured to be fitted to the rotating shaft, slip between the rotating shaft and the end ring is less likely to occur. .
第１図は本発明の実施例におけるモータの横断面図と側
面図、第２図は回転軸，端絡環，繊維強化樹脂部材のモ
デル図、第３図は従来のモータの横断面図と側面図であ
る。 14……回転子鉄心、15……回転軸、16……端絡環、17…
…導体棒、18……繊維補強部材。1 is a cross-sectional view and a side view of a motor according to an embodiment of the present invention, FIG. 2 is a model diagram of a rotating shaft, an end ring, and a fiber-reinforced resin member, and FIG. 3 is a cross-sectional view of a conventional motor. It is a side view. 14 ... Rotor core, 15 ... Rotary shaft, 16 ... End ring, 17 ...
... conductor rod, 18 ... fiber reinforced member.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) H02K 17/16 H02K 1/28 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) H02K 17/16 H02K 1/28
Claims (1)
に嵌合されかつ複数の導体棒で互いに連結されかつ回転
子鉄心の両端に配置固定された端絡環と、端絡環の外周
部に所定の張力で巻かれて成型された繊維強化樹脂部材
とを備え、この繊維強化樹脂部材の初期巻付け張力を、
回転軸と端絡環との間および端絡環と繊維強化樹脂部材
との間にモータ回転時にすべりが生じない下記（１），
（２）式の条件を満たし、かつ、端絡環と繊維強化樹脂
部材がモータ回転時に破壊しない下記（３），（４）式
の条件を満たすように設定したことを特徴とするモー
タ。 1. A rotor core fitted to a rotating shaft, an end ring connected to the rotating shaft and connected to each other by a plurality of conductor rods, and arranged and fixed at both ends of the rotor core. A fiber-reinforced resin member formed by being wound around the outer periphery of the ring with a predetermined tension, and an initial winding tension of the fiber-reinforced resin member,
No slippage occurs during rotation of the motor between the rotating shaft and the end ring and between the end ring and the fiber-reinforced resin member.
A motor characterized by satisfying the condition of the expression (2) and satisfying the conditions of the following expressions (3) and (4) so that the end ring and the fiber-reinforced resin member are not broken when the motor rotates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2133344A JP2987880B2 (en) | 1990-05-23 | 1990-05-23 | motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2133344A JP2987880B2 (en) | 1990-05-23 | 1990-05-23 | motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0429546A JPH0429546A (en) | 1992-01-31 |
| JP2987880B2 true JP2987880B2 (en) | 1999-12-06 |
Family
ID=15102528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2133344A Expired - Fee Related JP2987880B2 (en) | 1990-05-23 | 1990-05-23 | motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2987880B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050017597A1 (en) * | 2003-07-23 | 2005-01-27 | Mays Harold H. | End ring support structure for electric motor |
-
1990
- 1990-05-23 JP JP2133344A patent/JP2987880B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0429546A (en) | 1992-01-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |