JP2000245124A - Smooth core armature wound motor - Google Patents
Smooth core armature wound motorInfo
- Publication number
- JP2000245124A JP2000245124A JP11044087A JP4408799A JP2000245124A JP 2000245124 A JP2000245124 A JP 2000245124A JP 11044087 A JP11044087 A JP 11044087A JP 4408799 A JP4408799 A JP 4408799A JP 2000245124 A JP2000245124 A JP 2000245124A
- Authority
- JP
- Japan
- Prior art keywords
- armature
- armature core
- core
- frame
- coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、スロットを有しな
い円環状の電機子鉄心に回転磁界形成用のコイルを装着
し、前記コイルと空隙を介して永久磁石形回転子を設け
てなる平滑電機子巻線形モータに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a smoothing electric machine in which a coil for forming a rotating magnetic field is mounted on an annular armature core having no slot, and a permanent magnet rotor is provided through the coil and a gap. The present invention relates to a child winding type motor.
【０００２】[0002]
【従来の技術】平滑電機子巻線形モータは、コギングト
ルクが発生せず、スロット形モータに比べて磁気的な空
隙が広いため電機子反作用が小さいという特徴を持って
いる。そのため、従来より低トルクリップルや高ピーク
トルクが要求される用途に適用されている。従来のフレ
ーム付き平滑電機子巻線形モータは、薄い板状の鉄心を
積層して構成した円環状の電機子鉄心の内周形状に合う
ように成型した、回転磁界形成用の複数個のコイルを、
位置決め治具にて前記電機子鉄心内周面の所定の位置に
絶縁層を介して配置し、前記コイルの周囲を樹脂により
モールド成型して電機子鉄心とー体化している。前記電
機子鉄心は、前記フレームに嵌合固着するが、両者がは
ずれることがないように、外周面をレース加工等により
平滑面に仕上げて、円筒状のフレームの内周面に焼き嵌
めして強固に嵌合するか、あるいはフレームの内周面に
接着した後、複数の回り止め用のピンを打つなどの嵌合
方法を採っている。なお、前記コイルは、所定の極数が
構成されるように結線され、前記フレームの両端には、
負荷側と反負荷側のブラケットがネジ止め等の手段によ
り固着されている。負荷側と反負荷側のブラケットに
は、軸受によって回転自在に支承された回転子が設けら
れており、回転子の表面には前記コイルと機械的な空隙
を介して対向するように、複数の永久磁石が互いに異極
となるよう固着されている。2. Description of the Related Art Smooth armature winding type motors are characterized in that no cogging torque is generated and the armature reaction is small because of a large magnetic gap as compared with a slot type motor. Therefore, it has been applied to applications requiring lower torque ripple and higher peak torque than before. The conventional framed armature wound-type motor with a frame is composed of a plurality of coils for forming a rotating magnetic field, which are molded to match the inner peripheral shape of an annular armature core formed by laminating thin plate-shaped cores. ,
A positioning jig is disposed at a predetermined position on the inner peripheral surface of the armature core via an insulating layer, and the periphery of the coil is molded with a resin to be integrated with the armature core. The armature core is fitted and fixed to the frame, but the outer peripheral surface is finished to a smooth surface by lace processing or the like so as not to be disengaged, and shrink-fit to the inner peripheral surface of the cylindrical frame. A fitting method such as hitting a plurality of detent pins after firmly fitting or bonding to the inner peripheral surface of the frame is adopted. In addition, the coil is connected so that a predetermined number of poles is formed, and at both ends of the frame,
The bracket on the load side and the bracket on the non-load side are fixed by means such as screws. A rotor rotatably supported by bearings is provided on the brackets on the load side and the non-load side, and a plurality of rotors are provided on the surface of the rotor so as to face the coil via a mechanical gap. The permanent magnets are fixed so as to have mutually different polarities.
【０００３】[0003]
【発明が解決しようとする課題】前述したように、平滑
電機子巻線型モータの特徴としては、理論的にコギング
トルクが発生しない点があげられる。ところが、フレー
ムと電機子鉄心の固着を焼きばめにより行うと、フレー
ム加工時のフレームの変形が電機子鉄心に及び、電機子
鉄心が楕円形に変形するため、回転子の機械的な１回転
中に極数回のコギングトルクが発生してしまうという問
題があった。また、接着とピン打ちの併用によりフレー
ムに電機子鉄心を固定する方法では、製作が面倒で作業
工数が増加してしまうという問題点があった。本発明
は、このような問題を解消するためになされたもので、
コギングトルクが小さく、製作が容易な平滑電機子巻線
形モータを提供することを目的とするものである。As described above, a characteristic of the smooth armature winding type motor is that no cogging torque is theoretically generated. However, when the frame and the armature core are fixed to each other by shrink fitting, the deformation of the frame at the time of processing the frame extends to the armature core, and the armature core is deformed into an elliptical shape. There is a problem that cogging torque is generated several times during the operation. In addition, the method of fixing the armature core to the frame by using both bonding and pinning has a problem that the production is troublesome and the number of working steps increases. The present invention has been made to solve such a problem,
It is an object of the present invention to provide a smooth armature winding type motor having a small cogging torque and easy to manufacture.
【０００４】[0004]
【課題を解決するための手段】上記問題を解決するた
め、本発明は、円筒状のスロットレス形電機子鉄心の内
周面または外周面に回転磁界形成用のコイルを複数個装
着してなる電機子と、前記コイルと空隙を介して回転自
在に配置されたｐ極の永久磁石形回転子を有し、前記電
機子鉄心のコイル配置面の反対側にフレームを設けた平
滑電機子巻線形モータにおいて、前記電機子鉄心のフレ
ーム対向面に永久磁石の極数ｐと互いに素となる関係を
持ったｑ個の突起を等間隔に設けるとともに、前記フレ
ームの前記突起と対向する面に突起の形状に合わせた凹
部を設け、前記突起と凹部の嵌合により電機子鉄心とフ
レームを固着するようにしたものである。このようにす
ることにより、電機子鉄心をフレームに確実に固着で
き、かつ、電機子鉄心円筒部に大きな応力を与えること
なく、鉄心の変形に起因するコギングを小さくすること
ができる。さらに、ピンを打つ必要もなく工数を低減す
ることができる。In order to solve the above-mentioned problems, the present invention comprises a plurality of coils for forming a rotating magnetic field mounted on the inner or outer peripheral surface of a cylindrical slotless armature core. A smooth armature winding type comprising: an armature; a p-pole permanent magnet rotor rotatably disposed via a gap between the coil and the coil; and a frame provided on a side opposite to a coil arrangement surface of the armature core. In the motor, q projections having a prime relationship with the pole number p of the permanent magnet are provided at equal intervals on the frame-facing surface of the armature core, and projections are formed on the surface of the frame facing the projections. A recess is provided according to the shape, and the armature core and the frame are fixed by fitting the projection and the recess. By doing so, the armature core can be securely fixed to the frame, and cogging due to deformation of the core can be reduced without applying a large stress to the armature core cylindrical portion. Further, the number of steps can be reduced without the need to hit a pin.
【０００５】[0005]
【発明の実施の形態】以下、本発明の実施例を図に基づ
いて説明する。 ［第１の実施例］図１は本発明の第１の実施例を示す正
断面図である。本実施例は、３相、８極、６コイルのイ
ンナーロータ形の平滑電機子巻線形モータに適用した例
を示している。図において、１は平滑電機子巻線形モー
タ、２は電機子で、電機子鉄心３とコイル４を有してい
る。前記電機子鉄心３は、電磁鋼板から打ち抜いた薄い
板状の鉄心を積層して構成しており、外周部に等間隔に
ｑ個の、本実施例では１１個の突起５が設けられてい
る。前記突起５は、薄板状の電磁鋼板を打ち抜いて鉄心
を形成する際に一体に設けられる。一般にコギングトル
クの次数は極数とスロット数の最小公倍数となるので、
本発明では電機子鉄心３の突起数と極数の最小公倍数で
コギングが発生すると考えられる。一般的にコギングト
ルクは次数が高ければ高いほど振幅は小さくなるので、
電機子鉄心３の外周に設ける突起５の数ｑは極数ｐと互
いに素の関係となるようにする。本実施例では、コギン
グの次数は８８次である。各突起５の中心部はカシメが
施されており、電磁鋼板の打ち抜きと同時に鉄心のカシ
メによる仮止めが行われ、鉄心が所定の積厚となるよう
積層される。この際、電機子鉄心３を構成する鉄心を２
π／ｑ（ｒａｄ）ずつ回し積みするようにしてもよい。
前記電機子鉄心３の内周面に装着されるコイル４は、平
角線または丸線を用いて所定の巻回数となるように整列
巻きされ、電機子鉄心３の内周面ときれいに面接触する
ように成形される。電機子鉄心３の内周面には、絶縁層
６を介して６個のコイル４が等間隔に配置され、Ｕ相、
Ｗ相、Ｖ相、Ｕ相、Ｗ相、Ｖ相の順になるよう結線され
る。その後、前記コイル４は、樹脂により前記電機子鉄
心３の内周面に固着される。フレーム７は、アルミ合金
で構成されており、前記電機子鉄心３の突起５とフレー
ム７の内周面の凹部８で焼き嵌めによってー体となるよ
うに固着される。前記フレーム７の内径は電機子鉄心３
の外径より100 μｍ程度大きくしてあるので、フレーム
７が完全な円筒でない場合においても焼き嵌めにより電
機子鉄心３が変形することはない。なお、前記フレーム
７の両端には、図示しない負荷側ブラケットと反負荷側
ブラケットがネジ止め等の手段により固着されている。
また、前記負荷側と反負荷側のブラケットには、図示し
ない軸受によって軸方向に対して回転自在に支承された
回転子９が設けられており、前記回転子８の表面には、
前記コイル６と機械的な空隙Ｇを介して対向するように
８個の永久磁石１０が互いに異極となるよう固着されて
いる。 ［第２の実施例］図示していないが、本発明において
は、前記コイル４をボビンに巻装して前記電機子鉄心２
の表面に装着するようにしてもよい。この場合、コイル
形状に合うように成形された絶縁材料からなるボビン
と、前記ボビン同士をコイルピッチとなるように接続す
る柔軟な絶縁材料からなる連結部によって絶縁体を構成
し、前記ボビンに巻線を所定の巻回数だけ整列巻きした
ものを電機子鉄心３の表面に装着し、絶縁樹脂でモール
ドして電機子鉄心３とコイル４がー体となるようにす
る。このようにすることにより、ボビン間の接続部でコ
イル間の位置決めができ、コイル４の取り付けが正確
で、かつ容易に行なえる。また、コイル４の位置決め精
度が向上することにより、トルクリップルを小さくする
ことができる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. [First Embodiment] FIG. 1 is a front sectional view showing a first embodiment of the present invention. This embodiment shows an example in which the present invention is applied to a three-phase, eight-pole, six-coil inner rotor type smooth armature winding type motor. In the figure, 1 is a smooth armature winding type motor, 2 is an armature, which has an armature core 3 and a coil 4. The armature core 3 is formed by laminating thin plate-shaped cores punched from an electromagnetic steel plate, and is provided with q protrusions 5 at equal intervals on the outer peripheral portion, in this embodiment, 11 protrusions 5. . The projections 5 are provided integrally when punching a thin electromagnetic steel sheet to form an iron core. In general, the order of cogging torque is the least common multiple of the number of poles and the number of slots,
In the present invention, it is considered that cogging occurs at the least common multiple of the number of protrusions and the number of poles of the armature core 3. In general, the higher the order, the smaller the amplitude of the cogging torque becomes.
The number q of the projections 5 provided on the outer periphery of the armature core 3 is set to be relatively prime to the number of poles p. In this embodiment, the order of cogging is 88th. The central portion of each projection 5 is caulked, and the core is temporarily fixed by caulking simultaneously with the punching of the electromagnetic steel sheets, and the iron cores are laminated so as to have a predetermined thickness. At this time, the core constituting the armature core 3 is
You may make it rotate and pile by pi / q (rad).
The coil 4 mounted on the inner peripheral surface of the armature core 3 is aligned and wound using a rectangular wire or a round wire so as to have a predetermined number of turns, and makes clean surface contact with the inner peripheral surface of the armature core 3. It is molded as follows. Six coils 4 are arranged at equal intervals on the inner peripheral surface of the armature core 3 with an insulating layer 6 interposed therebetween.
The wires are connected in the order of W phase, V phase, U phase, W phase, and V phase. Thereafter, the coil 4 is fixed to the inner peripheral surface of the armature core 3 with resin. The frame 7 is made of an aluminum alloy, and is fixed to the projection 5 of the armature core 3 and the recess 8 of the inner peripheral surface of the frame 7 by shrink fitting so as to form a body. The inner diameter of the frame 7 is the armature core 3
Of the armature core 3 is not deformed by shrink fitting even when the frame 7 is not a perfect cylinder. A load-side bracket and a non-load-side bracket (not shown) are fixed to both ends of the frame 7 by means such as screws.
Further, a rotor 9 rotatably supported in the axial direction by a bearing (not shown) is provided on the load side and the non-load side bracket, and on the surface of the rotor 8,
Eight permanent magnets 10 are fixed to be opposite to each other so as to face the coil 6 via a mechanical gap G. [Second embodiment] Although not shown, in the present invention, the coil 4 is wound around a bobbin so that the armature core 2
It may be mounted on the surface of the. In this case, an insulator is constituted by a bobbin made of an insulating material molded to match the coil shape, and a connecting portion made of a flexible insulating material for connecting the bobbins with each other at a coil pitch, and winding the bobbin. A wire in which wires are aligned and wound a predetermined number of times is mounted on the surface of the armature core 3 and molded with an insulating resin so that the armature core 3 and the coil 4 become a core. By doing so, positioning between the coils can be performed at the connection between the bobbins, and the coil 4 can be accurately and easily mounted. Further, the torque ripple can be reduced by improving the positioning accuracy of the coil 4.
【０００６】[0006]
【発明の効果】以上述べたように、本発明によれば、コ
ギングトルクとトルクリップルが小さく、製作が容易で
かつ精度良く行なえる平滑電機子巻線形モータを提供す
ることができる効果がある。As described above, according to the present invention, there is an effect that it is possible to provide a smooth armature winding type motor which has a small cogging torque and a small torque ripple, is easy to manufacture, and can be accurately manufactured.
【図１】 本発明の実施例を示す正断面図である。FIG. 1 is a front sectional view showing an embodiment of the present invention.
１ 平滑電機子巻線形モータ、 ２ 電機子、 ３ 電機子鉄心、 ４ コイル、 ５ 突起、 ６ 絶縁層、 ７ フレーム、 ８ 凹部、 ９ 回転子、 １０ 永久磁石、 Ｇ 空隙 DESCRIPTION OF SYMBOLS 1 Smooth armature winding type motor, 2 armatures, 3 armature cores, 4 coils, 5 protrusions, 6 insulating layers, 7 frames, 8 recesses, 9 rotors, 10 permanent magnets, G air gap
Claims (4)
周面または外周面に回転磁界形成用のコイルを複数個装
着してなる電機子と、前記コイルと空隙を介して回転自
在に配置されたｐ極の永久磁石形回転子を有し、前記電
機子鉄心のコイル配置面の反対側にフレームを設けた平
滑電機子巻線形モータにおいて、 前記電機子鉄心のフレーム対向面に永久磁石の極数ｐと
互いに素となる関係を持ったｑ個の突起を等間隔に設け
るとともに、前記フレームの前記突起と対向する面に突
起の形状に合わせた凹部を設け、前記突起と凹部の嵌合
によりフレームに電機子鉄心を固着したことを特徴とす
る平滑電機子巻線形モータ。1. An armature having a plurality of coils for forming a rotating magnetic field mounted on an inner peripheral surface or an outer peripheral surface of a cylindrical slotless armature core, and rotatably disposed through the coil and an air gap. In a smooth armature winding type motor having a p-pole permanent magnet rotor and a frame provided on a side opposite to a coil arrangement surface of the armature core, a permanent magnet is provided on a frame-facing surface of the armature core. Q projections having a prime relationship with the number of poles p are provided at regular intervals, and a concave portion is formed on the surface of the frame facing the projection to fit the shape of the projection. A smooth armature winding type motor characterized in that an armature iron core is fixed to a frame by the above method.
して構成するとともに、前記電機子鉄心の前記突起にカ
シメを施し、前記電機子鉄心を仮止めしたことを特徴と
する請求項１に記載の平滑電機子巻線形モータ。2. The armature core is formed by laminating thin plate-shaped iron cores, and the projections of the armature core are caulked to temporarily fix the armature core. 2. The smooth armature winding type motor according to 1.
π／ｑ（ｒａｄ）ずつ回し積みしたことを特徴とする請
求項１または請求項２に記載の平滑電機子巻線形モー
タ。3. A thin plate-shaped iron core constituting an armature core
The motor according to claim 1 or 2, wherein the motor is wound and piled by π / q (rad).
材料からなるボビンと、前記ボビン同士をコイルピッチ
となるように接続する柔軟な絶縁材料からなる連結部に
よって絶縁体を構成し、前記ボビンに巻線を所定の巻回
数だけ整列巻きしたものを電機子鉄心の表面に装着し、
絶縁樹脂によりモールドして電機子鉄心とコイルがー体
となるようにしたことを特徴とする請求項１から３まで
のいずれかの項に記載の平滑電機子巻線形モータ。4. An insulator is formed by a bobbin made of an insulating material formed so as to match a coil shape, and a connecting portion made of a flexible insulating material connecting the bobbins with each other at a coil pitch. A winding wound in a predetermined number of turns is attached to the surface of the armature core,
The motor according to any one of claims 1 to 3, wherein the armature core and the coil are formed by molding with an insulating resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11044087A JP2000245124A (en) | 1999-02-23 | 1999-02-23 | Smooth core armature wound motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11044087A JP2000245124A (en) | 1999-02-23 | 1999-02-23 | Smooth core armature wound motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000245124A true JP2000245124A (en) | 2000-09-08 |
Family
ID=12681850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11044087A Pending JP2000245124A (en) | 1999-02-23 | 1999-02-23 | Smooth core armature wound motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000245124A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002136029A (en) * | 2000-10-20 | 2002-05-10 | Yaskawa Electric Corp | Stator for slotless motor |
| JP2002191147A (en) * | 2000-12-20 | 2002-07-05 | Yaskawa Electric Corp | Rotor structure of gap winding motor |
| JP2002272049A (en) * | 2001-03-08 | 2002-09-20 | Yaskawa Electric Corp | Soltless motor |
| US6984914B2 (en) | 2000-12-28 | 2006-01-10 | Matsushita Electric Industrial Co., Ltd. | Motor having characteristic structure in armature and disc apparatus |
| JP2007318876A (en) * | 2006-05-24 | 2007-12-06 | Toyota Industries Corp | Electric motor and electric compressor |
| US7405505B2 (en) | 2003-09-01 | 2008-07-29 | Mitsubishi Denki Kabushiki Kaisha | Rotary electric machine |
| KR101150990B1 (en) * | 2010-06-19 | 2012-06-13 | 김유정 | Brushless dc motor with slotless stator core |
| JP2013219925A (en) * | 2012-04-09 | 2013-10-24 | Toyota Motor Corp | Rotary electric machine |
| US9800100B2 (en) | 2014-06-06 | 2017-10-24 | Mitsubishi Electric Corporation | Permanent magnet motor and driving apparatus-integrated permanent magnet motor |
-
1999
- 1999-02-23 JP JP11044087A patent/JP2000245124A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002136029A (en) * | 2000-10-20 | 2002-05-10 | Yaskawa Electric Corp | Stator for slotless motor |
| JP4635323B2 (en) * | 2000-10-20 | 2011-02-23 | 株式会社安川電機 | Stator manufacturing method |
| JP2002191147A (en) * | 2000-12-20 | 2002-07-05 | Yaskawa Electric Corp | Rotor structure of gap winding motor |
| JP4736108B2 (en) * | 2000-12-20 | 2011-07-27 | 株式会社安川電機 | Gap winding motor and drive system |
| US6984914B2 (en) | 2000-12-28 | 2006-01-10 | Matsushita Electric Industrial Co., Ltd. | Motor having characteristic structure in armature and disc apparatus |
| JP2002272049A (en) * | 2001-03-08 | 2002-09-20 | Yaskawa Electric Corp | Soltless motor |
| US7405505B2 (en) | 2003-09-01 | 2008-07-29 | Mitsubishi Denki Kabushiki Kaisha | Rotary electric machine |
| DE112004001581B4 (en) | 2003-09-01 | 2022-06-23 | Mitsubishi Denki K.K. | Rotating electric machine |
| JP2007318876A (en) * | 2006-05-24 | 2007-12-06 | Toyota Industries Corp | Electric motor and electric compressor |
| KR101150990B1 (en) * | 2010-06-19 | 2012-06-13 | 김유정 | Brushless dc motor with slotless stator core |
| JP2013219925A (en) * | 2012-04-09 | 2013-10-24 | Toyota Motor Corp | Rotary electric machine |
| US9800100B2 (en) | 2014-06-06 | 2017-10-24 | Mitsubishi Electric Corporation | Permanent magnet motor and driving apparatus-integrated permanent magnet motor |
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