JP2995211B2 - Electric motor - Google Patents
Electric motorInfo
- Publication number
- JP2995211B2 JP2995211B2 JP1177241A JP17724189A JP2995211B2 JP 2995211 B2 JP2995211 B2 JP 2995211B2 JP 1177241 A JP1177241 A JP 1177241A JP 17724189 A JP17724189 A JP 17724189A JP 2995211 B2 JP2995211 B2 JP 2995211B2
- Authority
- JP
- Japan
- Prior art keywords
- steel plates
- hole
- secondary conductor
- rotor
- rotor core
- 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
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- Induction Machinery (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、カゴ型回転子を備える電動機に関する。The present invention relates to an electric motor having a cage rotor.
［従来の技術］ カゴ型回転子を備える電動機は、回転子の二次導体に
よって決定される二次抵抗が特性を大きく変化させるも
のである。[Related Art] In an electric motor including a cage rotor, a secondary resistance determined by a secondary conductor of the rotor greatly changes characteristics.
そして、従来この二次抵抗を変化させる場合、回転子
の軸方向端面に形成される短絡環の断面積を変えて対応
している。Conventionally, when the secondary resistance is changed, the cross-sectional area of the short-circuit ring formed on the axial end face of the rotor is changed.
しかし、従来の方法によれば、二次導体がアルミニウ
ム等の鋳造で形成されるため、鋳造の型を取り替えなけ
ればならないといった問題を有していた。However, according to the conventional method, since the secondary conductor is formed by casting of aluminum or the like, there is a problem that the casting mold must be replaced.
あるいは、最初から短絡環の断面積を大きく形成して
おき、必要な特性を得る寸法に切削して調整することも
ある。Alternatively, the short-circuit ring may be formed so as to have a large cross-sectional area from the beginning, and may be cut and adjusted to obtain a required characteristic.
しかし、切削は、１個毎行うことになるため、めんど
うな作業となり、機械化しても寸法が異なる多機種にな
ると工程の切り替えがめんどうであった。However, since the cutting is performed one by one, it becomes a troublesome work, and even if it is mechanized, it is troublesome to switch the process when there are many models having different dimensions.
その他、固有抵抗の異なる材料を用いて二次導体を形
成して抵抗値を変えることも行われている。しかし、こ
の場合も鋳造するのに異なる二次導体用の材料を溶融さ
せておくことは容易ではなく、作業性が良くなかった。In addition, a secondary conductor is formed by using materials having different specific resistances to change the resistance value. However, also in this case, it is not easy to melt a different material for the secondary conductor for casting, and the workability is not good.
そこで、二次導体用の透孔の断面積の異なる鋼板を組
み合わせて二次抵抗を変えることを考えた。しかし、こ
の場合でも、積層された鋼板の内部で二次抵抗が調整さ
れることになるため、短絡環と一体にアルミニウムなど
の鋳造で二次導体を形成すると、出来上がった回転子の
いずれ側が二次抵抗の高い方なのか見分けができなくな
る。Therefore, the inventors considered changing the secondary resistance by combining steel plates having different cross-sectional areas of the through holes for the secondary conductor. However, even in this case, since the secondary resistance is adjusted inside the laminated steel sheet, if a secondary conductor is formed by casting aluminum or the like integrally with the short-circuit ring, either side of the completed rotor will have a secondary resistance. It is impossible to tell if the next resistance is higher.
同じく、異なる鋼板の積層の比率が分からなくなり、
電動機の特性を測定して見分けなければならなくなる。Similarly, the ratio of the lamination of different steel plates is lost,
It is necessary to measure the characteristics of the motor to identify it.
本発明は、この様な事情に鑑みてなされたものであ
り、二次抵抗を変化させて異なる特性を得るのに積層鋼
板の加工に着目し、鋳造の型や二次抵抗用の材料を変え
ずに、また切削などのめんどうな作業を行うことなく製
造でき、しかも、出来上がった電動機の特性を容易に見
分けることができるように構成される電動機を提供する
ことを目的としている。The present invention has been made in view of such circumstances, and focuses on the processing of laminated steel sheets to obtain different characteristics by changing the secondary resistance, changing the casting mold and the material for the secondary resistance. It is an object of the present invention to provide an electric motor which can be manufactured without troublesome operations such as cutting and the like, and in which characteristics of the completed electric motor can be easily identified.
［問題点を解決するための手段］ 本発明は、それぞれ断面積の異なる二次導体用の透孔
を備えた２種類の鋼板であって、これら鋼板の一方に、
選別孔を形成し、これら２種類の鋼板を積層して回転子
コアを形成し、この回転子コアの二次導体用の透孔に二
次導体を鋳造したことによって問題点を解決している。[Means for Solving the Problems] The present invention relates to two types of steel plates provided with through-holes for secondary conductors having different cross-sectional areas, and one of these steel plates includes:
The problem is solved by forming a sorting hole, laminating these two types of steel plates to form a rotor core, and casting a secondary conductor in a through-hole for the secondary conductor of the rotor core. .
あるいは、前記２種類の鋼板に、それぞれ形状の異な
った選別孔を形成したことによって問題点を解決してい
る。Alternatively, the problem is solved by forming sorting holes having different shapes in the two types of steel plates.
あるいは、それぞれ断面積の異なる二次導体用の透孔
を備えた複数種類の鋼板であって、これら鋼板の一部、
あるいは全部の鋼板に、形状の異なった選別孔を形成
し、これら複数種類の鋼板を積層して回転子コアを形成
し、この回転子コアの二次導体用の透孔に二次導体を鋳
造したことによって問題点を解決している。Alternatively, it is a plurality of types of steel plates having through holes for secondary conductors having different cross-sectional areas, and a part of these steel plates,
Alternatively, sorting holes of different shapes are formed in all steel plates, and these plural types of steel plates are laminated to form a rotor core, and a secondary conductor is cast in a through hole for a secondary conductor of the rotor core. This solves the problem.
あるいは、それぞれ断面積の異なる二次導体用の透孔
を備えた複数種類の鋼板であって、これら鋼板の二次導
体用の透孔の外径側を、それぞれ異なった寸法で開放
し、これら複数種類の鋼板を積層して回転子コアを形成
し、この回転子コアの二次導体用の透孔に二次導体を鋳
造したことによって問題点を解決している。Alternatively, a plurality of types of steel plates having through-holes for secondary conductors having different cross-sectional areas, respectively, the outer diameter side of the through-holes for secondary conductors of these steel plates are opened with different dimensions, respectively. The problem is solved by laminating a plurality of types of steel plates to form a rotor core, and casting a secondary conductor in a through-hole for the secondary conductor of the rotor core.
「作用」 複数種類の鋼板を積層する際、それぞれの一部または
全部の鋼板に異なった形状の選別孔を形成することによ
り、二次導体用の透孔が短絡環で覆われても、選別孔、
あるいは二次導体用の透孔の解放部分の寸法によって二
次抵抗の異なる回転子を確認することができる。[Action] When stacking multiple types of steel sheets, by forming differently shaped selection holes in each or all of the steel sheets, even if the through-hole for the secondary conductor is covered with a short-circuit ring, it can be selected. Hole,
Alternatively, it is possible to identify rotors having different secondary resistances according to the size of the opening portion of the through hole for the secondary conductor.
［実施例］ 本発明を図面に示された一実施例にもとづいて説明す
ると、第１図は、本発明の一実施例による電動機の要部
を示す回転子の縦断面図であり、第２図は、積層されて
回転子コアを構成する鋼板の要部平面図であり、第３図
は、第２図に示される鋼板とは異なる二次抵抗用の透孔
が形成された鋼板の要部平面図である。[Embodiment] The present invention will be described with reference to an embodiment shown in the drawings. FIG. 1 is a longitudinal sectional view of a rotor showing a main part of an electric motor according to an embodiment of the present invention. FIG. 3 is a plan view of a main part of a steel sheet laminated to form a rotor core, and FIG. 3 is a plan view of a main part of a steel sheet having a through hole for a secondary resistance different from the steel sheet shown in FIG. It is a partial plan view.
第４図は、他の実施例による回転子の外観を示した要
部の斜視図である。FIG. 4 is a perspective view of a main part showing an appearance of a rotor according to another embodiment.
第１図において、電動機には、図示されない固定子の
内径側で回転するように回転子１が構成されており、こ
の回転子１は、２種の鋼板２、３を積層して回転子コア
が形成されている。In FIG. 1, the electric motor is provided with a rotor 1 that rotates on the inner diameter side of a stator (not shown). The rotor 1 is formed by laminating two types of steel plates 2 and 3 to form a rotor core. Are formed.
また、この回転子コアの中心部には、軸４が貫通され
ており、２種の鋼板２、３の夫々に形成された二次導体
用の透孔2a、3aには、アルミニウムの鋳造で形成された
二次導体５が備えられている。A shaft 4 penetrates through the center of the rotor core, and through-holes 2a and 3a for the secondary conductor formed in the two types of steel plates 2 and 3 are formed by casting aluminum. The formed secondary conductor 5 is provided.
さらに、二次導体５は、鋼板２、３の積層方向に貫通
されて形成されており、さらに、複数の二次導体が周方
向に形成されているものであり、両端が短絡環６、７に
よって連結されている。Further, the secondary conductor 5 is formed so as to penetrate in the laminating direction of the steel plates 2 and 3, and further has a plurality of secondary conductors formed in the circumferential direction, and short-circuit rings 6 and 7 are provided at both ends. Are linked by
短絡環６、７は、夫々二次導体５と一体にアルミニウ
ムの鋳造で形成されており、図示されないが、鋳造の型
に回転子コアを納めて溶融したアルミニウムを流して一
体に形成するものである。２種の鋼板２、３の一方の鋼
板３には、第２の透孔である選別孔Ａが形成されてお
り、この選別孔Ａは、短絡環６によって覆われないよう
に軸４に近い部分に位置している。The short-circuit rings 6 and 7 are each formed integrally with the secondary conductor 5 by casting aluminum. Although not shown, the short-circuit rings 6 and 7 are formed integrally by placing a rotor core in a casting mold and flowing molten aluminum. is there. A sorting hole A, which is a second through hole, is formed in one of the two steel plates 2 and 3, and the sorting hole A is close to the shaft 4 so as not to be covered by the short-circuit ring 6. Located on the part.
第２図及び第３図において、積層される鋼板２、３
は、二次導体用の透孔2a、3aが夫々異なる断面積で形成
されており、鋼板２の透孔2aの断面積が大きく、鋼板３
の透孔3aの断面積は小さく形成されている。In FIGS. 2 and 3, the laminated steel sheets 2, 3
The through-holes 2a and 3a for the secondary conductor are formed with different cross-sectional areas, and the cross-sectional area of the through-hole 2a of the steel plate 2 is large.
The cross-sectional area of the through hole 3a is formed small.
そして、一方の鋼板３には、選別孔Ａが形成されてい
る。A sorting hole A is formed in one steel plate 3.
第４図において、回転子1aは、異なる断面積の透孔で
構成される複数種類の鋼板8a、8b、8cが積層されてお
り、夫々の鋼板8a、8b、8cに夫々二次導体用の透孔の外
径側を開放して夫々幅の異なる開口9a、9b、9cが形成さ
れている。In FIG. 4, a rotor 1a is formed by laminating a plurality of types of steel plates 8a, 8b, and 8c each having a through-hole having a different cross-sectional area, and each of the steel plates 8a, 8b, and 8c has a secondary conductor. Openings 9a, 9b, 9c having different widths are formed by opening the outer diameter side of the through hole.
この様な構成において、電動機は、帯状の電磁鋼板を
プレスで打ち抜き、鋼板２、３を形成する。そして、こ
の様なプレスワークは、特開昭60−96152号公報に記載
されるように電磁鋼板を連続的に打ち抜き構成すれば容
易に実施できる。この場合、鋼板２、３は、打ち抜かれ
ると同時に所定の量が結合して容易に回転子の鉄心だけ
を得ることができる。In such a configuration, the electric motor forms the steel plates 2 and 3 by punching a belt-shaped electromagnetic steel plate with a press. Such a press work can be easily implemented by continuously punching out a magnetic steel sheet as described in JP-A-60-96152. In this case, the steel plates 2 and 3 are punched out and, at the same time, are joined by a predetermined amount, so that only the iron core of the rotor can be easily obtained.
さらに、鋼板２、３が積層されて形成された回転子コ
アを図示されないが鋳造の型に納めて透孔2a、3aに溶融
したアルミニウムを流して二次導体５を形成する。Further, the rotor core formed by laminating the steel plates 2 and 3 is placed in a casting mold (not shown), and molten aluminum is allowed to flow through the through holes 2a and 3a to form the secondary conductor 5.
この様な二次導体５の形成は、特開昭60−9352号に記
載されるように、鉄心を型に納めてから、二次導体５と
なる部材を透孔2a、3aに流し込み短絡環６、７を一体に
形成すればよい。この様に二次導体５を形成する際、鋼
板２、３に夫々形成されている透孔2a、3aは、鋼板２、
３の積層過程で断面積が異なることになるが、溶融した
アルミニウム等の流体は、無関係に流れ、空隙を形成す
ることなく、二次導体５及び短絡環６、７を形成するこ
とができる。As described in JP-A-60-9352, such a secondary conductor 5 is formed by placing an iron core in a mold and then pouring a member to be the secondary conductor 5 into the through holes 2a and 3a to form a short-circuit ring. What is necessary is just to form 6 and 7 integrally. When the secondary conductor 5 is formed in this way, the through holes 2a and 3a formed in the steel plates 2 and 3, respectively,
Although the cross-sectional area differs during the laminating process of No. 3, the fluid such as molten aluminum flows independently and can form the secondary conductor 5 and the short-circuit rings 6 and 7 without forming voids.
この様に形成された二次導体５は、断面積が異なる透
孔2aと透孔3aとの間で抵抗に差を生じ、鋼板２と鋼板３
の透孔2a、3aに溶融したアルミニウムを流した分量によ
って得られる合成抵抗で、ほぼ二次抵抗が決定される。The secondary conductor 5 thus formed has a difference in resistance between the through hole 2a and the through hole 3a having different cross-sectional areas.
The secondary resistance is substantially determined by the combined resistance obtained by the amount of molten aluminum flowing through the through holes 2a and 3a.
この様に二次抵抗が決定されると短絡環６、７によっ
て二次抵抗を調整する必要がなくなり、特性の異なる電
動機を製造する際、二次導体５及び短絡環６、７を鋳造
する型の変更が不要になる。そして、鋼板２、３の積層
は、電磁鋼板から打ち抜く際、鋼板２、３の所定の積層
毎に透孔2a、3aを形成するポンチの工程を変えても良
く、あるいは、異なる鋼板２、３を個別に形成してお
き、積み重ねて構成しても良い。When the secondary resistance is determined in this manner, it is not necessary to adjust the secondary resistance by the short-circuit rings 6 and 7, and when manufacturing motors having different characteristics, a mold for casting the secondary conductor 5 and the short-circuit rings 6 and 7 is used. Changes are not required. When the steel sheets 2 and 3 are laminated, the punching process for forming the through holes 2a and 3a may be changed for each predetermined lamination of the steel sheets 2 and 3 when punching from the electromagnetic steel sheet. May be formed individually and stacked.
いずれの場合でも、断面積の小さい透孔3aは、二次抵
抗を大きくし、断面積の大きい透孔2aは、二次抵抗を小
さくするため、両者の直列接続で合成抵抗を設定するこ
とができる。In any case, the through-hole 3a having a small sectional area increases the secondary resistance, and the through-hole 2a having a large sectional area reduces the secondary resistance. it can.
しかも、透孔2a、3aがプレスワークによって正確に得
られること、及び鋼板２、３の夫々の積層が任意、正確
に得られることから、断面積の調整が確実に行え、結果
として二次抵抗の調整が正確に行えるものとなる。Moreover, since the through holes 2a and 3a can be accurately obtained by the press work, and the lamination of each of the steel plates 2 and 3 can be arbitrarily and accurately obtained, the cross-sectional area can be adjusted reliably, and as a result, the secondary resistance Can be adjusted accurately.
そして、出来上がった回転子１は、透孔2a、3aが夫々
短絡環６、７によって覆われるため、２種の鋼板２、３
の区別ができなくなるが、一方の鋼板３に形成された選
別孔Ａによって二次抵抗の異なる鋼板の区別ができる。The completed rotor 1 has two through-holes 2a and 3a covered with short-circuit rings 6 and 7, respectively.
Can not be distinguished, but the sorting holes A formed in one of the steel plates 3 can distinguish between the steel plates having different secondary resistances.
しかも、この選別孔Ａは、一方の鋼板３にのみ形成さ
れているため、軸方向にデプスゲージを挿入すれば、一
方の鋼板３の積層量を計ることができる。Moreover, since the sorting hole A is formed only in one of the steel plates 3, the depth of the one steel plate 3 can be measured by inserting a depth gauge in the axial direction.
従って、鋼板２、３の積層の比率を変えて特性を調整
した場合、出来上がった回転子１の選別孔Ａを測定して
特性を知ることができる。Therefore, when the characteristics are adjusted by changing the ratio of the lamination of the steel plates 2 and 3, the characteristics can be known by measuring the sorting holes A of the completed rotor 1.
この様な選別孔Ａは、３種類以上の鋼板が組み合わせ
られる場合は、夫々径を異ならせるか、あるいは位置を
異ならせれば良い。When three or more types of steel plates are combined, such a sorting hole A may have a different diameter or a different position.
一方、第４図に示された他の実施例では、二次導体用
の透孔の外径側を開放し、透孔の種類に合わせて夫々幅
が異なる開口9a、9b、9cを形成してあるため、回転子1a
外周を見るだけで異なる特性のものの区別ができる。On the other hand, in another embodiment shown in FIG. 4, the outer diameter side of the through hole for the secondary conductor is opened, and openings 9a, 9b, and 9c having different widths are formed according to the type of the through hole. Rotor 1a
Just by looking at the outer periphery, it is possible to distinguish between different characteristics.
この様な開口9a、9b、9cは、通常0.8〜1.0mm程度のた
め、夫々0.03〜0.05mm程度の差でも容易に区別ができ
る。Such openings 9a, 9b, 9c are usually about 0.8 to 1.0 mm, so that a difference of about 0.03 to 0.05 mm can be easily distinguished.
従って、トルク等の特性に与える影響は大きくなく、
特性が犠牲になることはない。Therefore, the influence on characteristics such as torque is not significant.
The characteristics are not sacrificed.
［発明の効果］ 本発明によれば、回転子の外観上から、２次抵抗の異
なる状態を区別でき、また、２次抵抗値を求めることが
できるため、その効果は産業上極めて大きいものであ
る。[Effects of the Invention] According to the present invention, different states of the secondary resistance can be distinguished from the appearance of the rotor, and the secondary resistance value can be obtained. is there.
第１図は、本発明の一実施例による電動機の要部を示す
回転子の縦断面図であり、第２図は、積層されて回転子
を構成する鋼板の要部平面図であり、第３図は、第２図
に示される鋼板とは異なる透孔を形成する鋼板の要部平
面図である。 第４図は、他の実施例による回転子の外観を示した要部
の斜視図である。 １……回転子、２、３……鋼板、５……二次導体、６、
７……短絡環、2a、3a……透孔、Ａ……選別孔。FIG. 1 is a longitudinal sectional view of a rotor showing a main part of an electric motor according to an embodiment of the present invention, and FIG. 2 is a plan view of a main part of steel plates laminated to form a rotor. FIG. 3 is a plan view of a main part of a steel sheet forming a through hole different from the steel sheet shown in FIG. FIG. 4 is a perspective view of a main part showing an appearance of a rotor according to another embodiment. 1 ... rotor, 2, 3 ... steel plate, 5 ... secondary conductor, 6,
7 ... short-circuit ring, 2a, 3a ... through-hole, A ... sorting hole.
Claims (4)
類の鋼板であって、これら鋼板の一方に、選別孔を形成
し、 これら２種類の鋼板を積層して回転子コアを形成し、 この回転子コアの二次導体用の透孔に二次導体を鋳造し
てカゴ型の回転子を構成したことを特徴とする電動機。An electric motor having a cage rotor, comprising: two types of steel plates having through holes for secondary conductors having different cross-sectional areas, wherein a selection hole is formed in one of these steel plates; An electric motor characterized by forming a rotor core by laminating these two types of steel plates to form a rotor core, and casting a secondary conductor into a through-hole for a secondary conductor of the rotor core. .
った選別孔を形成したことを特徴とする特許請求の範囲
第１項記載の電動機。2. The electric motor according to claim 1, wherein sorting holes having different shapes are formed in the two types of steel plates.
を備えた複数種類の鋼板であって、これら鋼板の一部、
あるいは全部の鋼板に、形状の異なった選別孔を形成
し、 これら複数種類の鋼板を積層して回転子コアを形成し、 この回転子コアの二次導体用の透孔に二次導体を鋳造し
てカゴ型の回転子を構成したことを特徴とする電動機。3. A plurality of types of steel plates each having a through hole for a secondary conductor having a different cross-sectional area.
Alternatively, sorting holes having different shapes are formed in all steel plates, and a plurality of steel plates are laminated to form a rotor core, and a secondary conductor is cast in a through hole for a secondary conductor of the rotor core. An electric motor comprising a cage rotor.
を備えた複数種類の鋼板であって、 これら鋼板の二次導体用の透孔の外径側を、それぞれ異
なった寸法で開放し、 これら複数種類の鋼板を積層して回転子コアを形成し、 この回転子コアの二次導体用の透孔に二次導体を鋳造し
てカゴ型の回転子を構成したことを特徴とする電動機。4. A plurality of types of steel plates having through holes for secondary conductors having different cross-sectional areas, wherein the outer diameter sides of the through holes for secondary conductors of these steel plates are opened with different dimensions. A rotor core is formed by stacking a plurality of types of steel plates to form a rotor core, and a cage-shaped rotor is formed by casting a secondary conductor into a through-hole for a secondary conductor of the rotor core. Electric motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1177241A JP2995211B2 (en) | 1989-07-11 | 1989-07-11 | Electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1177241A JP2995211B2 (en) | 1989-07-11 | 1989-07-11 | Electric motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0345149A JPH0345149A (en) | 1991-02-26 |
| JP2995211B2 true JP2995211B2 (en) | 1999-12-27 |
Family
ID=16027619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1177241A Expired - Fee Related JP2995211B2 (en) | 1989-07-11 | 1989-07-11 | Electric motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2995211B2 (en) |
-
1989
- 1989-07-11 JP JP1177241A patent/JP2995211B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0345149A (en) | 1991-02-26 |
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| LAPS | Cancellation because of no payment of annual fees |