JP2001037115A - Stator core of rotating machine - Google Patents
Stator core of rotating machineInfo
- Publication number
- JP2001037115A JP2001037115A JP11209414A JP20941499A JP2001037115A JP 2001037115 A JP2001037115 A JP 2001037115A JP 11209414 A JP11209414 A JP 11209414A JP 20941499 A JP20941499 A JP 20941499A JP 2001037115 A JP2001037115 A JP 2001037115A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic pole
- divided
- pole teeth
- outer annular
- tip
- 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
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、ステータコイル
を巻装するための複数の同一形状の磁極歯を有する回転
機のステータコアに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator core of a rotating machine having a plurality of identically shaped magnetic pole teeth for winding a stator coil.
【０００２】[0002]
【従来の技術】ロータ（回転子）に永久磁石を用い、ス
テータ（固定子）にステータコイル（電機子巻線）を有
する永久磁石式直流回転モータが公知である。また種々
の直流モータや交流モータ、あるいは発電機において
も、ステータコイルを巻装したステータを用いるものが
知られている。2. Description of the Related Art A permanent magnet type DC rotary motor having a permanent magnet for a rotor and a stator coil for a stator is known. Various DC motors, AC motors, and generators using a stator wound with a stator coil are also known.
【０００３】このようなステータとしては、通常円筒状
の部分から内側に向かって突出する磁極歯を有するステ
ータコアを用いている。そして各磁極歯の間のスロット
内に収まるようにステータコイルを巻くものである。こ
の場合スロットは磁極歯の間から内径側に向かって開口
している。このためステータコアの内径側から各磁極歯
にステータコイルを巻かねばならず、作業性が極めて悪
くなり、生産性も悪いという問題があった。またスロッ
ト内に密にコイルを装填することが困難になり、スペー
スファクタ（スロット断面積に対するコイル断面積の割
合）も低くなる。As such a stator, a stator core having magnetic pole teeth projecting inward from a generally cylindrical portion is used. Then, the stator coil is wound so as to fit in the slot between the magnetic pole teeth. In this case, the slot is open from the space between the magnetic pole teeth toward the inner diameter side. For this reason, the stator coil must be wound around each magnetic pole tooth from the inner diameter side of the stator core, and there has been a problem that workability is extremely poor and productivity is poor. In addition, it becomes difficult to densely mount the coil in the slot, and the space factor (the ratio of the coil cross-sectional area to the slot cross-sectional area) is reduced.
【０００４】そこでステータコアを２つの部材に分割す
ることが提案された。すなわち内側環状部から磁極歯を
外側へ放射状に突出させた内側部材と、この内側部材の
外周を囲む外側環状部材とに分けたものである。この場
合内側部材の各磁極歯は外側に向かって突出しているか
ら、磁極間のスロットも外側に向かって開くことにな
る。従ってスロットにステータコイルを巻装する際の作
業性が向上し、スペースファクタも高くすることができ
る。このようにステータコイルを巻装した後、この内側
部材を外側環状部材の内側に挿入するものである。[0004] Therefore, it has been proposed to divide the stator core into two members. That is, it is divided into an inner member in which the magnetic pole teeth project radially outward from the inner annular portion, and an outer annular member surrounding the outer periphery of the inner member. In this case, since the magnetic pole teeth of the inner member protrude outward, the slots between the magnetic poles also open outward. Therefore, the workability when winding the stator coil around the slot is improved, and the space factor can be increased. After winding the stator coil in this way, the inner member is inserted into the outer annular member.
【０００５】[0005]
【発明が解決しようとする課題】しかしこのようにステ
ータコイルを巻装した内側部材を外側環状部材に挿入す
るものでは、内側部材の磁極歯の先端と外側環状部材と
の密着が不完全となり易く、微小な間隙（ギャップ）が
発生ことが避けられない。この間隙が発生すると磁束が
通る経路（磁路）の抵抗（磁気抵抗）が増大し、損失が
増え、効率が悪くなる。However, when the inner member on which the stator coil is wound is inserted into the outer annular member, the contact between the tip of the magnetic pole teeth of the inner member and the outer annular member tends to be incomplete. Inevitably, generation of minute gaps (gaps) is inevitable. When this gap occurs, the resistance (magnetic resistance) of the path (magnetic path) through which the magnetic flux passes increases, the loss increases, and the efficiency deteriorates.
【０００６】この発明はこのような事情に鑑みなされた
ものであり、ステータコアを分割式としてステータコイ
ルを巻装し易くした場合に、磁極歯と外側環状部材との
密着性を向上させて磁気抵抗を小さくし、損失を少なく
して効率を上げることができるようにした回転機のステ
ータコアを提供することを目的とする。The present invention has been made in view of such circumstances, and when the stator core is divided so that the stator coil can be easily wound, the adhesion between the magnetic pole teeth and the outer annular member is improved to improve the magnetic resistance. It is an object of the present invention to provide a stator core of a rotating machine capable of reducing the loss and increasing the efficiency by reducing the loss.
【０００７】[0007]
【発明の構成】この発明によればこの目的は、ロータの
外周面に対向する複数の磁極歯を備え、各磁極歯にステ
ータコイルを巻装可能にした回転機のステータコアにお
いて、ロータの外周をエアギャップを保って囲む内側環
状部と、この内側環状部から放射状に等間隔に外側へ突
出するように前記環状部に一体形成された同一形状の複
数の磁極歯と、各磁極歯の外側先端に密着する外側環状
部材とを備え、前記外側環状部を周方向に等間隔に少な
くとも３分割とし、各分割部に密着する磁極歯の先端面
を各分割部の着脱方向外側に向かって凸な山形としたこ
とを特徴とする回転機のステータコア、により達成され
る。SUMMARY OF THE INVENTION According to the present invention, there is provided a stator core of a rotating machine having a plurality of magnetic pole teeth opposed to an outer peripheral surface of a rotor, wherein a stator coil can be wound around each magnetic pole tooth. An inner annular portion surrounding the air gap, a plurality of magnetic pole teeth of the same shape integrally formed on the annular portion so as to protrude radially outward from the inner annular portion at equal intervals, and an outer tip of each magnetic pole tooth An outer annular member that is in close contact with each other, the outer annular portion is divided into at least three at equal intervals in the circumferential direction, and the tip surfaces of the magnetic pole teeth that are in close contact with each of the divided portions are convex toward the outside in the mounting and dismounting direction of each of the divided portions. This is achieved by a stator core of a rotating machine characterized by having a mountain shape.
【０００８】[0008]
【実施態様】図１は本発明の一実施態様である永久磁石
式直流回転モータの要部断面図、図２はそのステータコ
アの分解図、図３はステータコアの一部拡大図である。
このモータは、ロータ１０（回転子）に永久磁石を用
い、ステータ１２に回転磁界を形成するものである。1 is a sectional view of a main part of a permanent magnet type DC rotary motor according to an embodiment of the present invention, FIG. 2 is an exploded view of the stator core, and FIG. 3 is a partially enlarged view of the stator core.
This motor uses a permanent magnet for the rotor 10 (rotor) and forms a rotating magnetic field on the stator 12.
【０００９】ロータ１０は回転軸（図示せず）に保持さ
れた円筒１４と、この円筒１４の外周に嵌合されたロー
タコア１６と、このロータコア１６に固定された１２個
の永久磁石１８とを有する。ロータコア１６はけい素薄
鋼板を略環状に打ち抜いたものを円筒１４の長手方向に
積層したものである。ここにロータコア１６には周方向
に幅広で半径方向に薄い空隙２０が等間隔に１２個形成
されている。The rotor 10 includes a cylinder 14 held on a rotating shaft (not shown), a rotor core 16 fitted on the outer periphery of the cylinder 14, and twelve permanent magnets 18 fixed to the rotor core 16. Have. The rotor core 16 is formed by punching a silicon thin steel plate into a substantially annular shape and laminating the same in the longitudinal direction of the cylinder 14. Here, twelve voids 20 which are wide in the circumferential direction and thin in the radial direction are formed at equal intervals in the rotor core 16.
【００１０】永久磁石１８は例えば焼結型ネオジム・鉄
・ホウ素磁石などで板状に作られ、各永久磁石１８は空
隙２０に装填される。なお永久磁石１８の幅は空隙２０
の幅よりも小さく、この空隙２０内には、永久磁石１８
を装填した状態で永久磁石１８の両側に磁気短絡を避け
るための間隙が残されている。The permanent magnets 18 are made of, for example, a sintered type neodymium / iron / boron magnet in a plate shape. Note that the width of the permanent magnet 18 is
Is smaller than the width of the permanent magnet 18 in the gap 20.
Are left on both sides of the permanent magnet 18 in a state in which a magnetic short circuit is avoided.
【００１１】ステータ１２は、ステータコア２２と、ス
テータコイル（図示せず）とを有する。ステータコア２
２は内側部材２４と、外側環状部材２６とを組合せて固
定したものである。ここに内側部材２４および外側環状
部材２６は前記ロータコア１６と同様にけい素薄鋼板を
打抜き加工したものを積層し固定したものである。The stator 12 has a stator core 22 and a stator coil (not shown). Stator core 2
Reference numeral 2 denotes a combination of the inner member 24 and the outer annular member 26, which is fixed. Here, the inner member 24 and the outer annular member 26 are formed by laminating and punching silicon thin steel plates similarly to the rotor core 16.
【００１２】内側部材２４は、内側環状部２８と、この
内側環状部２８から外側へ等間隔に放射状に突出する１
８個の同一形状の磁極歯３０とを一体形成したものであ
る。内側環状部２８の内径は、ロータ１０の外径よりも
僅かに大きく、両者の間に小さい空隙すなわちエアギャ
ップ３２が形成される。各磁極歯３０にはステータコイ
ル（図示せず）が巻装される。すなわちステータコイル
は磁極歯３０の間に形成されるスロット（溝）３４内に
装填される。The inner member 24 has an inner annular portion 28, and radially protrudes outward from the inner annular portion 28 at equal intervals.
It is formed by integrally forming eight magnetic pole teeth 30 having the same shape. The inner diameter of the inner annular portion 28 is slightly larger than the outer diameter of the rotor 10, and a small gap, that is, an air gap 32 is formed therebetween. A stator coil (not shown) is wound around each magnetic pole tooth 30. That is, the stator coil is loaded in a slot (groove) 34 formed between the magnetic pole teeth 30.
【００１３】外側環状部材２６は３つの円弧状の分割部
３６に等分割され、これら３つの分割部３６を組合せた
時には各分割部３６の内面が磁極歯３０の先端に外側か
ら密着する。すなわち３つの分割部３６は、図２に示す
ようにステータコイルを巻装した内側部材２４に対して
中心Ａに向かって組付けられ、この状態で固定部材（図
示せず）によって固定される。The outer annular member 26 is equally divided into three arc-shaped divided portions 36. When these three divided portions 36 are combined, the inner surface of each divided portion 36 comes into close contact with the tip of the magnetic pole tooth 30 from outside. That is, the three divided portions 36 are assembled toward the center A with respect to the inner member 24 on which the stator coil is wound as shown in FIG. 2, and are fixed by a fixing member (not shown) in this state.
【００１４】ここに全ての磁極歯３０の先端は、分割部
３６の着脱方向Ｂの外側に向かって凸な山形となってい
る。また分割部３６の内面には、図３に示すようにこれ
ら磁極歯３０の先端が係合する谷形の凹部３８が形成さ
れている。ここに磁極歯３０の先端に形成される山形の
２つの斜面Ｃ，Ｄは、共に分割部３６の着脱方向Ｂの外
側に対向する。Here, the tips of all the magnetic pole teeth 30 have a chevron shape that protrudes outward in the mounting / removing direction B of the divided portion 36. On the inner surface of the divided portion 36, a valley-shaped concave portion 38 with which the tips of the magnetic pole teeth 30 engage is formed as shown in FIG. Here, the two slopes C and D of the chevron formed at the tips of the magnetic pole teeth 30 are both opposed to the outside in the attaching / detaching direction B of the divided portion 36.
【００１５】すなわち分割部３６の周方向で最も外側に
位置する斜面Ｃの延長線をＬＣとし、中心Ａを通り着脱
方向Ｂと平行な直線をＬＢとした時に、両直線ＬＣ，Ｌ
Ｂがステータ１２の外側で交わるようにしたものであ
る。従って両直線ＬＣ，ＬＢが挟む角度θは負にならず
常に正になるものである。なお分割部３６の周方向で最
も外側の磁極歯３０に対して以上の条件を満たしていれ
ば、これより内側の磁極歯３０に対してはこの条件は当
然に満たされる。That is, when the extension line of the outermost slope C in the circumferential direction of the dividing portion 36 is LC, and a straight line passing through the center A and parallel to the attaching / detaching direction B is LB, both straight lines LC, L
B intersect outside the stator 12. Therefore, the angle θ between the straight lines LC and LB is always positive without being negative. If the above condition is satisfied with respect to the outermost magnetic pole teeth 30 in the circumferential direction of the divided portion 36, this condition is naturally satisfied with respect to the inner magnetic pole teeth 30.
【００１６】このように各分割部３６に密着する磁極歯
３０の先端を、分割部３６の着脱方向Ｂの外側に向かっ
て凸となるように山形に形成したから、全ての磁極歯３
０の先端を分割部３６の谷形の凹部３８に密着させるこ
とが可能になる。従ってこの状態で３つの分割部３６を
内側部材２４に押圧し固定すれば、磁極歯３０と外側環
状部材２６との密着性が向上する。Since the tips of the magnetic pole teeth 30 that are in close contact with the respective divided portions 36 are formed so as to be convex toward the outside in the attaching / detaching direction B of the divided portions 36, all the magnetic pole teeth 3 are formed.
It is possible to bring the leading end of the zero into close contact with the valley-shaped concave portion 38 of the divided portion 36. Therefore, if the three divided portions 36 are pressed and fixed to the inner member 24 in this state, the adhesion between the magnetic pole teeth 30 and the outer annular member 26 is improved.
【００１７】以上の実施態様は永久磁石直流モータにこ
の発明を適用したが、誘導モータなど他の形式のモータ
や発電機であってもコイルを有するステータを有するも
のであればこの発明が適用可能であり、この発明はこれ
らを包含する。外側環状部材２６は３分割以上に分割し
てもよいが、分割数を増やすと部品点数が増え分割箇所
が増えることによる磁気抵抗の増大を招くことになる。
従って３分割にするのが最も好ましい。In the above embodiment, the present invention is applied to a permanent magnet DC motor. However, the present invention is applicable to other types of motors such as induction motors and generators as long as they have a stator having a coil. The present invention includes these. The outer annular member 26 may be divided into three or more divisions. However, if the number of divisions is increased, the number of parts is increased and the number of divisions is increased, thereby increasing the magnetic resistance.
Therefore, it is most preferable to divide into three.
【００１８】[0018]
【発明の効果】請求項１の発明は以上のように、ステー
タコアを、内側環状部とここから外側へ等間隔に放射状
に突出する同一形状の磁極歯とを一体形成した内側部材
と、３以上に分割された外側環状部材とで形成し、各磁
極歯の先端面を各分割部の着脱方向外側に向かって凸な
山形にしたものであるから、分割部を外側から内側部材
側に押圧し保持することにより、磁極歯先端面と外側環
状部材との密着性を向上させることができる。このため
ステータの磁気抵抗を減少させ、損失を少なくして効率
を高めることが可能になる。According to the first aspect of the present invention, as described above, the stator core is formed by integrally forming the inner annular portion and the magnetic pole teeth having the same shape protruding radially outward from the inner annular portion at equal intervals. Since each of the magnetic pole teeth is formed into a convex shape toward the outside in the mounting / removing direction of each divided portion, the divided portion is pressed from the outside toward the inside member. By holding it, the adhesion between the tip end surface of the magnetic pole teeth and the outer annular member can be improved. Therefore, the magnetic resistance of the stator can be reduced, the loss can be reduced, and the efficiency can be increased.
【図１】本発明の一実施態様の要部断面図FIG. 1 is a sectional view of a main part of an embodiment of the present invention.
【図２】ステータコアの分割図FIG. 2 is a split view of a stator core.
【図３】ステータコアの一部拡大図FIG. 3 is a partially enlarged view of a stator core.
１０ ロータ １２ ステータ ２２ ステータコア ２４ 内側部材 ２６ 外側環状部材 ２８ 内側環状部 ３０ 磁極歯 ３４ スロット ３６ 分割部 DESCRIPTION OF SYMBOLS 10 Rotor 12 Stator 22 Stator core 24 Inner member 26 Outer annular member 28 Inner annular portion 30 Magnetic pole tooth 34 Slot 36 Division part
フロントページの続き Ｆターム(参考） 5H002 AA02 AA03 AA09 AB06 AC00 AC08 AE07 AE08 5H621 GA01 GA14 HH01 JK03 JK05 JK13 JK17 Continued on the front page F term (reference) 5H002 AA02 AA03 AA09 AB06 AC00 AC08 AE07 AE08 5H621 GA01 GA14 HH01 JK03 JK05 JK13 JK17
Claims (1)
を備え、各磁極歯にステータコイルを巻装可能にした回
転機のステータコアにおいて、 ロータの外周をエアギャップを保って囲む内側環状部
と、この内側環状部から放射状に等間隔に外側へ突出す
るように前記環状部に一体形成された同一形状の複数の
磁極歯と、各磁極歯の外側先端に密着する外側環状部材
とを備え、前記外側環状部を周方向に等間隔に少なくと
も３分割とし、各分割部に密着する磁極歯の先端面を各
分割部の着脱方向外側に向かって凸な山形としたことを
特徴とする回転機のステータコア。1. A stator core of a rotating machine having a plurality of magnetic pole teeth facing an outer peripheral surface of a rotor, wherein a stator coil can be wound on each magnetic pole tooth, wherein an inner annular portion surrounds the outer circumference of the rotor while keeping an air gap. A plurality of magnetic pole teeth of the same shape integrally formed on the annular portion so as to protrude outward at equal intervals radially from the inner annular portion, and an outer annular member in close contact with the outer tip of each magnetic pole tooth. Wherein the outer annular portion is divided into at least three at equal intervals in the circumferential direction, and the tip surfaces of the magnetic pole teeth which are in close contact with the respective divided portions are formed into a mountain shape convex outward in the mounting / removing direction of the respective divided portions. Machine stator core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11209414A JP2001037115A (en) | 1999-07-23 | 1999-07-23 | Stator core of rotating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11209414A JP2001037115A (en) | 1999-07-23 | 1999-07-23 | Stator core of rotating machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001037115A true JP2001037115A (en) | 2001-02-09 |
Family
ID=16572495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11209414A Pending JP2001037115A (en) | 1999-07-23 | 1999-07-23 | Stator core of rotating machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001037115A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2394123A (en) * | 2002-08-05 | 2004-04-14 | Visteon Global Tech Inc | Stator for brushless motor |
| CN104852489A (en) * | 2015-05-22 | 2015-08-19 | 湖州佳力机电科技有限公司 | Stator punching sheet of combination structure |
| CN108712032A (en) * | 2018-07-11 | 2018-10-26 | 赵欣 | A kind of production method and special stater iron core press-loading apparatus of high-precision servo motor |
-
1999
- 1999-07-23 JP JP11209414A patent/JP2001037115A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2394123A (en) * | 2002-08-05 | 2004-04-14 | Visteon Global Tech Inc | Stator for brushless motor |
| GB2394123B (en) * | 2002-08-05 | 2005-05-04 | Visteon Global Tech Inc | Stator for brushless motor |
| US6935011B2 (en) | 2002-08-05 | 2005-08-30 | Visteon Global Technologies, Inc. | Method of forming a stator for a brushless motor |
| CN104852489A (en) * | 2015-05-22 | 2015-08-19 | 湖州佳力机电科技有限公司 | Stator punching sheet of combination structure |
| CN108712032A (en) * | 2018-07-11 | 2018-10-26 | 赵欣 | A kind of production method and special stater iron core press-loading apparatus of high-precision servo motor |
| CN108712032B (en) * | 2018-07-11 | 2023-08-01 | 江西拓又达科技集团有限公司 | Manufacturing method of high-precision servo motor and special stator core press-fitting device |
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