JPH07312858A - Rotary electric machine - Google Patents
Rotary electric machineInfo
- Publication number
- JPH07312858A JPH07312858A JP6102497A JP10249794A JPH07312858A JP H07312858 A JPH07312858 A JP H07312858A JP 6102497 A JP6102497 A JP 6102497A JP 10249794 A JP10249794 A JP 10249794A JP H07312858 A JPH07312858 A JP H07312858A
- Authority
- JP
- Japan
- Prior art keywords
- electric machine
- permanent magnet
- stator
- laminated iron
- magnetic
- 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
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、特に、回転子の鉄心構
成を改良した回転電機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary electric machine having an improved rotor core structure.
【０００２】[0002]
【従来の技術】軸方向に鉄心を積層した従来のステッピ
ングモータの４極の回転子の一例を図７の斜視図に示
す。図７において、符号31は回転軸、符号32は回転軸１
と平行に弧状に積層された積層鉄心である。図示しない
固定子は、180 °間隔に内側に突設された一対の歯が一
組の相となるために、一対の歯に巻装されたコイルは並
列あるいは直列に接続されている。2. Description of the Related Art FIG. 7 is a perspective view showing an example of a four-pole rotor of a conventional stepping motor in which iron cores are laminated in the axial direction. In FIG. 7, reference numeral 31 is a rotary shaft, and reference numeral 32 is a rotary shaft 1.
It is a laminated iron core laminated in an arc shape in parallel with. In a stator (not shown), a pair of teeth projecting inward at 180 ° intervals form one set of phases, so that the coils wound around the pair of teeth are connected in parallel or in series.
【０００３】回転力を増やすために、ステッピングモー
タの回転子は、各突極部33の間に形成された凹極部34と
固定子巻線が巻装された歯との間の磁気抵抗が大きくな
り、固定子の歯の内側と突極部33の間の磁気抵抗が小さ
くなるように、珪素鋼板を積層した積層鉄心32を回転軸
31と平行な方向に形成している。ステッピングモータ
は、このように突極構造の回転子とすることにより、固
定子に対する突極部33と凹極部34の磁気抵抗の差を利用
して回転力を得ている。In order to increase the rotational force, the rotor of the stepping motor has a magnetic resistance between the concave pole portions 34 formed between the salient pole portions 33 and the teeth around which the stator winding is wound. In order to increase the magnetic resistance between the teeth of the stator and the salient pole portion 33, the laminated iron core 32 laminated with silicon steel plates is used as the rotating shaft.
It is formed in the direction parallel to 31. The stepping motor thus configured as the rotor having the salient pole structure obtains a rotational force by utilizing the difference in magnetic resistance between the salient pole portion 33 and the concave pole portion 34 with respect to the stator.
【０００４】また、励磁電流は同一値でも、回転子の突
極部32と固定子に突設された歯の内面における空隙が狭
いほど、磁束密度が高く回転力は大きくなるので、突極
部32の外周は、弧状になっている。Further, even if the exciting current is the same value, the smaller the gap between the salient pole portion 32 of the rotor and the inner surfaces of the teeth protruding from the stator, the higher the magnetic flux density and the larger the rotating force. The outer circumference of 32 is arcuate.
【０００５】次に、従来のハイブリッド形ステッピング
モータの断面形状を図８に示し、このハイブリッド形ス
テッピングモータに組み込まれた回転子の斜視図を図９
に示す。図８及び図９において、符号41は回転軸、符号
42Ａ，42Ｂは珪素鋼板を積層した積層鉄心を回転軸41に
対して垂直な方向に形成した回転子鉄心である。また、
符号43は円筒形状で軸方向に磁化された永久磁石、符号
44は回転子鉄心42Ａ，42Ｂと同様に積層された固定子鉄
心で、フレーム46の内周に固定されている。Next, FIG. 8 shows a cross-sectional shape of a conventional hybrid type stepping motor, and FIG. 9 is a perspective view of a rotor incorporated in this hybrid type stepping motor.
Shown in. In FIGS. 8 and 9, reference numeral 41 is a rotation axis, reference numeral
Reference numerals 42A and 42B denote rotor cores in which laminated iron cores formed by laminating silicon steel plates are formed in a direction perpendicular to the rotating shaft 41. Also,
Reference numeral 43 is a cylindrical permanent magnet magnetized in the axial direction,
Reference numeral 44 denotes a stator core that is laminated similarly to the rotor cores 42A and 42B and is fixed to the inner circumference of the frame 46.
【０００６】回転子鉄心42Ａ，42Ｂの外周には、90度間
隔に突設された突極部42ｂの間に船底状の凹極部42ａが
それぞれ軸方向に形成され、突極部42ｂの両端部には、
突極部端部42ｃが形成されている。回転子鉄心42Ａ，42
Ｂには、成層鋼板で製作される場合と塊状鉄心で製作さ
れる場合がある。On the outer circumferences of the rotor cores 42A and 42B, ship-bottom-shaped concave pole portions 42a are formed in the axial direction between salient pole portions 42b projecting at intervals of 90 degrees, and both ends of the salient pole portions 42b are formed. In the department,
The salient pole end 42c is formed. Rotor core 42A, 42
B may be made of a laminated steel plate or a massive iron core.
【０００７】回転子は、永久磁石43が回転子鉄心42Ａと
回転子鉄心42Ｂの間に挿入されており、回転子鉄心42
Ａ，42Ｂは互いに離れているが、一方の鉄心の突極部42
ｂは他方の鉄心の突極部42ｂに対して図９に示すよう
に、１／２歯ピッチずらした状態で組み立てられてい
る。The rotor has a permanent magnet 43 inserted between a rotor core 42A and a rotor core 42B.
A and 42B are separated from each other, but salient pole portion 42 of one iron core
As shown in FIG. 9, b is assembled with the salient pole portion 42b of the other iron core shifted by a 1/2 tooth pitch.
【０００８】[0008]
【発明が解決しようとする課題】ところが、このように
構成された従来のハイブリッド形ステッピングモータに
おいては、回転子鉄心42Ａ，42Ｂは、珪素鋼板を軸方向
に対して直交するようにして積層されており、珪素鋼板
の間には、僅かながら空隙があり、この空隙は軸方向に
磁化された永久磁石にとっては、磁気的抵抗部となり、
永久磁石43による磁束が減少する。However, in the conventional hybrid type stepping motor configured as described above, the rotor cores 42A and 42B are formed by stacking silicon steel plates so as to be orthogonal to the axial direction. However, there is a slight air gap between the silicon steel sheets, and this air gap serves as a magnetic resistance portion for the permanent magnet magnetized in the axial direction.
The magnetic flux due to the permanent magnet 43 is reduced.
【０００９】さらに、回転子鉄心42Ａ，42Ｂを構成する
珪素鋼板のうち、永久磁石43に隣接した部分には、永久
磁石43の磁束が集中するので、磁気飽和し漏れ磁束が生
じて、回転力が低下する。Further, among the silicon steel plates forming the rotor cores 42A and 42B, the magnetic flux of the permanent magnet 43 concentrates on the portion adjacent to the permanent magnet 43, so that magnetic saturation occurs and a leakage magnetic flux is generated, resulting in a rotational force. Is reduced.
【００１０】また、永久磁石43による磁束と固定子巻線
45による磁束により、図９に示す回転子鉄心42Ａ，42Ｂ
の突極部端部42ｃでは、磁束が集中するため磁気飽和
し、前述した永久磁石43に隣接した珪素鋼板と同様に漏
れ磁束が発生する。Further, the magnetic flux generated by the permanent magnet 43 and the stator winding
The magnetic flux generated by 45 causes the rotor cores 42A, 42B shown in FIG.
At the salient pole end 42c, the magnetic flux is concentrated and thus magnetically saturated, and a leakage magnetic flux is generated similarly to the silicon steel plate adjacent to the permanent magnet 43 described above.
【００１１】また、固定子鉄心42Ａ，42Ｂの代りに塊状
鉄心を採用すると、コイルを励磁したときに、塊状鉄心
で渦電流が発生し、鉄損が大きくなる。Further, if a lump iron core is adopted instead of the stator iron cores 42A and 42B, when the coil is excited, an eddy current is generated in the lump iron core, resulting in a large iron loss.
【００１２】次に、回転数の高い高速領域でモータの端
子電圧を低くするために弱め界磁を行う場合には、電機
子反作用により永久磁石43の磁束を反発させるが、その
反発される永久磁石43の磁束の磁路がオープン状態とな
り、磁気回路のパーミアンスが小さくなる。Next, when field weakening is performed in order to reduce the terminal voltage of the motor in the high speed region of high rotation speed, the magnetic flux of the permanent magnet 43 is repelled by the armature reaction, but the repulsed permanent The magnetic path of the magnetic flux of the magnet 43 is opened, and the permeance of the magnetic circuit is reduced.
【００１３】そこで、本発明の目的は、漏れ磁束を減ら
し、磁気飽和を防ぎ、磁気回路のパーミアンスと回転力
を増やすことのできる回転電機を得ることである。Therefore, an object of the present invention is to provide a rotating electric machine capable of reducing leakage flux, preventing magnetic saturation, and increasing permeance and torque of a magnetic circuit.
【００１４】[0014]
【課題を解決するための手段】請求項１に記載の発明
は、固定子と同軸に貫設された回転軸と、この回転軸の
外周に電磁鋼板の方向を回転軸と平行に配設され外周に
複数の突極部と凹極部が交互に形成された複数の積層鉄
心と、この積層鉄心の間に挿着された永久磁石とからな
る回転電機である。According to a first aspect of the present invention, there is provided a rotary shaft that is coaxially provided with the stator, and an electromagnetic steel sheet is arranged on the outer periphery of the rotary shaft in a direction parallel to the rotary shaft. The rotary electric machine includes a plurality of laminated iron cores having a plurality of salient pole portions and concave pole portions formed alternately on the outer periphery thereof, and a permanent magnet inserted between the laminated iron cores.
【００１５】また、請求項２に記載の発明は、固定子と
同軸に貫設された回転軸と、この回転軸の外周に電磁鋼
板の方向を回転軸と平行に配設され電磁鋼板の間に高磁
気抵抗材が挿入され外周に複数の突極部と凹極部が交互
に形成された複数の積層鉄心と、この積層鉄心の間に挿
着された永久磁石とからなる回転電機である。Further, the invention according to claim 2 is characterized in that a rotating shaft which is coaxially penetrated with the stator and an electromagnetic steel plate disposed on the outer periphery of the rotating shaft so that the direction of the electromagnetic steel plate is parallel to the rotating shaft. A rotary electric machine comprising a plurality of laminated iron cores in which a high magnetic resistance material is inserted in the outer periphery of which a plurality of salient pole portions and concave pole portions are alternately formed, and a permanent magnet inserted between the laminated iron cores. .
【００１６】また、請求項３に記載の発明は、固定子と
同軸に貫設された回転軸と、この回転軸の外周に電磁鋼
板の方向を回転軸と平行に配設され電磁鋼板の間に高電
気抵抗材が挿入され外周に複数の突極部と凹極部が交互
に形成された複数の積層鉄心と、この積層鉄心の間に挿
着された永久磁石とからなる回転電機である。According to a third aspect of the present invention, there is provided a rotary shaft that is coaxially provided with the stator, and an electromagnetic steel plate is provided on the outer periphery of the rotary shaft so that the direction of the magnetic steel plate is parallel to the rotary shaft. A rotary electric machine comprising a plurality of laminated iron cores in which a high electrical resistance material is inserted and a plurality of salient pole portions and concave pole portions are alternately formed on the outer periphery, and a permanent magnet inserted between the laminated iron cores. .
【００１７】また、請求項４に記載の発明は、固定子と
同軸に貫設された回転軸と、この回転軸の外周に電磁鋼
板の方向を回転軸と平行に配設され外周に複数の突極部
と凹極部が交互に形成され突極部にオーバハング部が突
設された複数の積層鉄心と、この積層鉄心の間に挿着さ
れた永久磁石とからなる回転電機である。Further, in the invention according to a fourth aspect, a rotating shaft which is provided coaxially with the stator is provided, and the electromagnetic steel sheet is arranged on the outer circumference of the rotating shaft in parallel with the rotating shaft. A rotary electric machine comprising a plurality of laminated iron cores in which salient pole portions and concave pole portions are alternately formed, and overhang portions project from the salient pole portions, and a permanent magnet inserted between the laminated iron cores.
【００１８】また、請求項５に記載の発明は、凹極部に
非磁性材の穴埋め片を備えた請求項１，請求項２，請求
項３又は請求項５に記載の回転電機である。The invention according to claim 5 is the rotating electric machine according to claim 1, claim 2, claim 3 or claim 5, wherein the concave pole portion is provided with a hole filling piece of a non-magnetic material.
【００１９】さらに、請求項６に記載の発明は、固定子
の巻線がパルス電流で励磁される請求項１，請求項２，
請求項３，請求項４又は請求項５に記載の回転電機であ
る。Further, in the invention according to claim 6, the windings of the stator are excited by a pulse current.
The rotating electric machine according to claim 3, claim 4, or claim 5.
【００２０】[0020]
【作用】請求項１に記載の発明においては、永久磁石で
発生した磁束の磁路の一部となる永久磁石と積層鉄心と
の境界面では、積層鉄心の端面が永久磁石の側面に接触
する。In the invention described in claim 1, at the boundary surface between the permanent magnet and the laminated core, which is a part of the magnetic path of the magnetic flux generated in the permanent magnet, the end surface of the laminated core contacts the side surface of the permanent magnet. .
【００２１】また、請求項２に記載の発明においては、
永久磁石で発生した磁束の磁路の一部となる永久磁石と
積層鉄心との境界面では、積層鉄心の端面が永久磁石の
側面に接触し、積層鉄心の鉄損は、電磁鋼板の間に挿着
された高磁気抵抗材によって減少する。According to the second aspect of the invention,
At the boundary surface between the permanent magnet and the laminated iron core, which is part of the magnetic path of the magnetic flux generated by the permanent magnet, the end surface of the laminated iron core contacts the side surface of the permanent magnet, and the iron loss of the laminated iron core is between the electromagnetic steel sheets. Reduced by the inserted high reluctance material.
【００２２】また、請求項３に記載の発明においては、
永久磁石で発生した磁束の磁路の一部となる永久磁石と
積層鉄心との境界面では、積層鉄心の端面が永久磁石の
側面に接触し、積層鉄心の鉄損は、電磁鋼板の間に挿着
された高電気抵抗材によって減少する。In the invention according to claim 3,
At the boundary surface between the permanent magnet and the laminated iron core, which is part of the magnetic path of the magnetic flux generated by the permanent magnet, the end surface of the laminated iron core contacts the side surface of the permanent magnet, and the iron loss of the laminated iron core is between the electromagnetic steel sheets. It is reduced by the inserted high electric resistance material.
【００２３】また、請求項４に記載の発明においては、
永久磁石で発生した磁束の磁路の一部となる永久磁石と
積層鉄心との境界面では、積層鉄心の端面が永久磁石の
側面に接触し、積層鉄心と永久磁石とで構成される磁路
のパーミアンスは、オーバハング部によって大きくな
る。Further, in the invention described in claim 4,
At the boundary surface between the permanent magnet and the laminated core, which is part of the magnetic path of the magnetic flux generated by the permanent magnet, the end surface of the laminated core contacts the side surface of the permanent magnet, and the magnetic path formed by the laminated core and the permanent magnet. The permeance of is increased by the overhang part.
【００２４】また、請求項５に記載の発明においては、
穴埋め片によって回転子の風損が減少する。In the invention described in claim 5,
The hole plugs reduce rotor windage loss.
【００２５】さらに、請求項６に記載の発明において
は、パルスモータの高トルク化と外形の小形化が達成さ
れる。Further, in the invention according to the sixth aspect, the torque of the pulse motor is increased and the outer shape is reduced.
【００２６】[0026]
【実施例】以下、本発明の回転電機の一実施例を図面を
参照して説明する。図１は、請求項１，請求項２，請求
項３及び請求項６に記載の回転電機を示す横断面図で、
従来の技術で示した図８に対応する図、図２は図１で示
した回転電機の回転子を示す拡大斜視図で、同じく図７
に対応する図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the rotating electric machine of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a rotating electric machine according to claim 1, claim 2, claim 3 and claim 6,
8 is a view corresponding to FIG. 8 shown in the related art, and FIG. 2 is an enlarged perspective view showing a rotor of the rotary electric machine shown in FIG.
It is a figure corresponding to.
【００２７】図１及び図２において、固定子は、積層さ
れた珪素鋼板からなり、内周に複数の図示しない歯部が
等間隔に突設された固定子鉄心７と、この固定子鉄心７
に突設された歯部に装着された固定子巻線７ａで構成さ
れている。回転子は、磁極軸方向または磁路方向にそっ
て珪素鋼板を弧状に積層した回転子鉄心２Ａ，２Ｂの外
周の凹極部２ａと突極部４が90度間隔に形成されてい
る。In FIGS. 1 and 2, the stator is made of laminated silicon steel plates, and a stator core 7 is provided with a plurality of tooth portions (not shown) protruding at equal intervals on the inner circumference, and the stator core 7.
It is composed of a stator winding 7a mounted on the tooth portion protruding from the. In the rotor, concave pole portions 2a and salient pole portions 4 on the outer circumference of rotor cores 2A and 2B, which are formed by laminating silicon steel plates in an arc shape along the magnetic pole axis direction or the magnetic path direction, are formed at 90 degree intervals.
【００２８】回転子鉄心２Ａ，２Ｂの間には、磁化され
た円筒形状の永久磁石３が挿入されている。各回転子鉄
心２Ａ，２Ｂは、各回転子鉄心２Ａ，２Ｂに形成された
凹極部２ａの中央部のボルト穴に挿入されたボルト５
で、回転軸１に固定されている。この回転軸１には、回
転子鉄心２Ａ，２Ｂの内側の曲率と同一曲率の面取りが
90度間隔に形成され、この面取りの中央部にめねじ穴が
形成されている。回転子鉄心２Ａ，２Ｂは、珪素鋼板を
弧状に折曲した帯板の板を重ねてかしめた積層片を４個
突き合せ、この突き合せ部をレーザ溶接構成している。A magnetized cylindrical permanent magnet 3 is inserted between the rotor cores 2A and 2B. Each rotor core 2A, 2B has a bolt 5 inserted in a bolt hole at the center of the concave pole portion 2a formed on each rotor core 2A, 2B.
It is fixed to the rotary shaft 1. The rotary shaft 1 is chamfered with the same curvature as the inner curvature of the rotor cores 2A, 2B.
The chamfers are formed at intervals of 90 degrees, and female threads are formed in the center of the chamfer. The rotor cores 2A and 2B are made by laser welding the abutting portions of four laminated pieces obtained by abutting together and crimping strips of silicon steel sheets bent in an arc shape.
【００２９】固定子鉄心７は、円筒状のフレーム９の内
周に圧入され、このフレーム９は、このフレーム９の両
端に内面側の外周が挿入された軸受ブラケット６Ａ，６
Ｂに固定されている。軸受ブラケット６Ａ，６Ｂの中心
には、ころがり軸受８がそれぞれ挿入され、このころが
り軸受８には、回転軸１の両端が貫通して支えられてい
る。The stator core 7 is press-fitted into the inner periphery of a cylindrical frame 9, and the frame 9 has bearing brackets 6A and 6A with inner periphery being inserted into both ends of the frame 9.
It is fixed to B. Rolling bearings 8 are inserted in the centers of the bearing brackets 6A and 6B, respectively, and both ends of the rotary shaft 1 are pierced and supported by the rolling bearings 8.
【００３０】このように回転子が構成された回転電機に
おいては、固定子鉄心７の歯部に挿入された固定子巻線
７ａへの通電によって発生した磁束が、歯部から回転子
鉄心２Ａ，２Ｂの突極部４を通過するときには、磁路の
方向に折曲形成された積層片の圧延方向に磁束は通過す
るので、磁気抵抗が少なく、漏れ磁束を減らすことがで
きる。In the rotary electric machine having the rotor as described above, the magnetic flux generated by the energization of the stator winding 7a inserted in the tooth portion of the stator iron core 7 causes the magnetic flux generated from the tooth portion to the rotor iron core 2A, When passing through the salient pole portion 4 of 2B, since the magnetic flux passes in the rolling direction of the laminated piece bent and formed in the direction of the magnetic path, the magnetic resistance is small and the leakage magnetic flux can be reduced.
【００３１】一方、固定子鉄心７の歯部と回転子鉄心２
Ａ，２Ｂの凹極部２ａが対向したときには、従来のステ
ッピングモータと同様に、固定子鉄心７の歯部の先端と
凹極部ａの底面間に形成された空隙によって磁気抵抗が
大きくなるので、回転力を増やすことができる。On the other hand, the teeth of the stator core 7 and the rotor core 2
When the concave pole portions 2a of A and 2B face each other, the magnetic resistance increases due to the gap formed between the tips of the teeth of the stator core 7 and the bottom surface of the concave pole portion a, as in the conventional stepping motor. , The rotational force can be increased.
【００３２】さらに、回転子鉄心２Ａ，２Ｂを構成する
積層片は、回転子鉄心２Ａ，２Ｂの対向側の端面が永久
磁石３の側面に直接接触しているので、各積層片の端面
から永久磁石３を経て各積層片の他側に至る磁路の磁気
抵抗を減らすことができ、各積層片の端面から永久磁石
に磁束が通過するので、各積層片を通過する磁束は均一
となり、積層片の部分的磁気飽和を防ぐことができ、漏
水磁束を減らし回転力を増やすことができる。Further, the laminated pieces constituting the rotor cores 2A and 2B have their end faces on the opposite sides of the rotor cores 2A and 2B directly in contact with the side faces of the permanent magnet 3, so that the end faces of the respective laminated pieces are permanent. The magnetic resistance of the magnetic path from the magnet 3 to the other side of each laminated piece can be reduced, and since the magnetic flux passes from the end face of each laminated piece to the permanent magnet, the magnetic flux passing through each laminated piece becomes uniform, It is possible to prevent partial magnetic saturation of the piece, reduce leakage magnetic flux and increase rotational force.
【００３３】なお、上記実施例においては、図７で示し
たステッピングモータと同様の回転電機の例で説明した
が、多相交流駆動の同期機やブラシレスＤＣモータにも
適用することができる。In the above embodiment, an example of a rotary electric machine similar to the stepping motor shown in FIG. 7 has been described, but the present invention can also be applied to a multi-phase AC driven synchronous machine or a brushless DC motor.
【００３４】図３は、請求項１，請求項２及び請求項３
に記載の発明のステッピングモータの他の実施例を示す
断面図で、図１に対応する図である。図３に示すよう
に、図１，図２に述べた磁気回路を１スタックとする
と、複数のスタックで回転子を構成することで、ステッ
ピングモータの定格を上げることができる。FIG. 3 shows claims 1, 2 and 3.
2 is a cross-sectional view showing another embodiment of the stepping motor of the invention described in FIG. 1, and is a view corresponding to FIG. 1. As shown in FIG. 3, assuming that the magnetic circuit described in FIGS. 1 and 2 is one stack, the rating of the stepping motor can be increased by configuring the rotor with a plurality of stacks.
【００３５】図４は、請求項４に記載の発明のステッピ
ングモータを示す斜視図で、図５は図４の断面図であ
る。この場合には、一対の積層鉄心22Ａ，22Ｂの突極部
の対向部に、互いに対向側に突き出たオーバハング部を
形成することで、一対の積層鉄心22Ａ，22Ｂの外周間に
磁路を形成し、永久磁石３で発生した磁界の磁路のパー
ミアンスを大として弱め界磁の効果を上げ、高速回転を
更に容易にしたものである。FIG. 4 is a perspective view showing a stepping motor of the invention described in claim 4, and FIG. 5 is a sectional view of FIG. In this case, the magnetic path is formed between the outer peripheries of the pair of laminated cores 22A and 22B by forming overhang portions protruding toward the opposite sides of the pair of laminated cores 22A and 22B at the opposing portions of the salient pole portions. However, the permeance of the magnetic path of the magnetic field generated by the permanent magnet 3 is increased to weaken the effect of the field magnet, and the high speed rotation is further facilitated.
【００３６】さらに、図６は請求項５に記載の発明のス
テッピングモータを示す断面図で、図２で示したステッ
ピングモータの回転子の凹極部にアルミニウム材で製作
した穴埋め片をボルト５で固定した場合を示す。Further, FIG. 6 is a sectional view showing a stepping motor according to a fifth aspect of the present invention, in which a hole filling piece made of an aluminum material is attached to the concave pole portion of the rotor of the stepping motor shown in FIG. Shows the case when fixed.
【００３７】この穴埋め片10の片側は、積層鉄心２Ａ，
２Ｂの外側の凹極部の曲面と同一曲率に形成され、穴埋
め片10の他側は、積層鉄心２Ａ，２Ｂの突極部の曲面と
同一曲率に形成されている。この場合には、回転子の風
損を減らし、回転時の騒音を減らすことができる。な
お、穴埋め片10の材料はステンレス鋼材でもよい。One side of the hole filling piece 10 has a laminated core 2A,
The curved surface of the concave pole portion on the outer side of 2B is formed to have the same curvature, and the other side of the hole filling piece 10 is formed to have the same curvature as the curved surface of the salient pole portions of the laminated cores 2A and 2B. In this case, it is possible to reduce windage loss of the rotor and reduce noise during rotation. The material of the hole filling piece 10 may be stainless steel.
【００３８】このように構成された回転電機において
は、前述したように磁路の抵抗を減らすことができるの
で、従来の回転電機に組み込まれた永久磁石よりも小さ
な永久磁石を適用することができ、外形を小形化するこ
とができる。または、安価な永久磁石を適用した回転子
を有する回転電機を提供することができる。Since the resistance of the magnetic path can be reduced in the rotating electric machine configured as described above, a permanent magnet smaller than the permanent magnet incorporated in the conventional rotating electric machine can be applied. The outer shape can be miniaturized. Alternatively, it is possible to provide a rotating electric machine having a rotor to which an inexpensive permanent magnet is applied.
【００３９】[0039]
【発明の効果】以上、請求項１に記載の発明によれば、
固定子と同軸に貫設された回転軸と、この回転軸の外周
に電磁鋼板の方向を回転軸と平行に配設され外周に複数
の突極部と凹極部が交互に形成された複数の積層鉄心
と、この積層鉄心の間に挿着された永久磁石とで回転電
機を構成し、永久磁石で発生した磁束の磁路の一部とな
る永久磁石と積層鉄心との境界面で積層鉄心の端面を永
久磁石の側面に接触させたので、漏れ磁束を減らし、磁
気飽和を防ぎ、磁気回路のパーミアンスと回転力を増や
すことのできる回転電機を得ることができる。As described above, according to the invention of claim 1,
A rotary shaft penetrating coaxially with the stator and a plurality of salient poles and concave poles alternately formed on the outer periphery of the rotary shaft with the direction of the electromagnetic steel sheet parallel to the rotary shaft. Of the laminated core and a permanent magnet inserted between the laminated core to form a rotating electric machine, and the permanent magnet, which becomes a part of the magnetic path of the magnetic flux generated by the permanent magnet, is laminated at the interface between the laminated core and the permanent magnet. Since the end surface of the iron core is brought into contact with the side surface of the permanent magnet, it is possible to obtain a rotating electric machine that can reduce leakage flux, prevent magnetic saturation, and increase permeance and torque of the magnetic circuit.
【００４０】また、請求項２に記載の発明によれば、固
定子と同軸に貫設された回転軸と、この回転軸の外周に
電磁鋼板の方向を回転軸と平行に配設され電磁鋼板の間
に高磁気抵抗材が挿入され外周に複数の突極部と凹極部
が交互に形成された複数の積層鉄心と、この積層鉄心の
間に挿着された永久磁石とで回転電機を構成し、永久磁
石で発生した磁束の磁路の一部となる永久磁石と積層鉄
心との境界面で積層鉄心の端面を永久磁石の側面に接触
させ、積層鉄心の鉄損は、電磁鋼板の間に挿着された高
磁気抵抗材によって減少させたので、漏れ磁束を減ら
し、磁気飽和を防ぎ、磁気回路のパーミアンスと回転力
を増やすことのできる回転電機を得ることができる。According to the second aspect of the present invention, a rotating shaft which is provided coaxially with the stator and an electromagnetic steel plate which is arranged on the outer periphery of the rotating shaft such that the direction of the electromagnetic steel plate is parallel to the rotating shaft. High magnetic resistance material is inserted between and a plurality of laminated cores with a plurality of salient poles and concave poles alternately formed on the outer periphery, and a permanent magnet inserted between the laminated cores The end face of the laminated iron core is brought into contact with the side surface of the permanent magnet at the boundary surface between the permanent magnet and the laminated iron core, which constitutes a part of the magnetic path of the magnetic flux generated by the permanent magnet, and the iron loss of the laminated iron core is Since it is reduced by the high magnetic resistance material inserted between them, it is possible to obtain a rotating electric machine capable of reducing leakage flux, preventing magnetic saturation, and increasing permeance and torque of the magnetic circuit.
【００４１】また、請求項３に記載の発明によれば、固
定子と同軸に貫設された回転軸と、この回転軸の外周に
電磁鋼板の方向を回転軸と平行に配設され電磁鋼板の間
に高電気抵抗材が挿入され外周に複数の突極部と凹極部
が交互に形成された複数の積層鉄心と、この積層鉄心の
間に挿着された永久磁石とで回転電機を構成し、永久磁
石で発生した磁束の磁路の一部となる永久磁石と積層鉄
心との境界面で積層鉄心の端面を永久磁石の側面に接触
させ、積層鉄心の鉄損は、電磁鋼板の間に挿着された高
電気抵抗材によって減少させたので、漏れ磁束を減ら
し、磁気飽和を防ぎ、磁気回路のパーミアンスと回転力
を増やすことのできる回転電機を得ることができる。According to the third aspect of the present invention, a rotating shaft which is provided coaxially with the stator, and an electromagnetic steel plate which is arranged on the outer periphery of the rotating shaft such that the direction of the electromagnetic steel plate is parallel to the rotating shaft. A rotary electric machine is composed of a plurality of laminated cores in which a high electric resistance material is inserted between the plurality of laminated cores and a plurality of salient pole portions and concave pole portions are alternately formed on the outer periphery, and a permanent magnet inserted between the laminated iron cores. The end face of the laminated iron core is brought into contact with the side surface of the permanent magnet at the boundary surface between the permanent magnet and the laminated iron core, which constitutes a part of the magnetic path of the magnetic flux generated by the permanent magnet, and the iron loss of the laminated iron core is Since it is reduced by the high electric resistance material inserted between them, it is possible to obtain a rotating electric machine that can reduce leakage flux, prevent magnetic saturation, and increase permeance and torque of the magnetic circuit.
【００４２】また、請求項４に記載の発明によれば、固
定子と同軸に貫設された回転軸と、この回転軸の外周に
電磁鋼板の方向を回転軸と平行に配設され外周に複数の
突極部と凹極部が交互に形成され突極部にオーバハング
部が突設された複数の積層鉄心と、この積層鉄心の間に
挿着された永久磁石とで回転電機を構成し、永久磁石で
発生した磁束の磁路の一部となる永久磁石と積層鉄心と
の境界面で積層鉄心の端面を永久磁石の側面に接触さ
せ、積層鉄心と永久磁石とで構成される磁路のパーミア
ンスは、オーバハング部によって大きくしたので、漏れ
磁束を減らし、磁気飽和を防ぎ、磁気回路のパーミアン
スと回転力を増やすことのできる回転電機を得ることが
できる。Further, according to the invention described in claim 4, a rotating shaft which is provided coaxially with the stator and an electromagnetic steel sheet on the outer circumference of the rotating shaft are arranged in parallel with the rotating shaft, and the outer circumference is provided. A rotary electric machine is configured by a plurality of laminated cores in which a plurality of salient pole portions and concave pole portions are alternately formed and an overhang portion is projectingly provided on the salient pole portions, and a permanent magnet inserted between the laminated iron cores. , The magnetic path formed by the laminated core and the permanent magnet by contacting the end face of the laminated core with the side surface of the permanent magnet at the boundary surface between the permanent magnet and the laminated core, which is a part of the magnetic path of the magnetic flux generated by the permanent magnet. Since the permeance is increased by the overhang portion, it is possible to obtain a rotating electric machine that can reduce leakage flux, prevent magnetic saturation, and increase the permeance and torque of the magnetic circuit.
【００４３】また、請求項５に記載の発明によれば、凹
極部に非磁性材の穴埋め片を備えた請求項１，請求項
２，請求項３又は請求項５に記載の回転電機に備えるこ
とで、穴埋め片によって回転子の風損を減少させたの
で、漏れ磁束を減らし、磁気飽和を防ぎ、磁気回路のパ
ーミアンスと回転力を増やすことのできる回転電機を得
ることができる。According to the invention as defined in claim 5, the rotary electric machine according to claim 1, claim 2, claim 3 or claim 5 wherein the concave pole portion is provided with a filling piece of a non-magnetic material. Since the wind loss of the rotor is reduced by the provision of the hole filling piece, it is possible to obtain a rotating electric machine capable of reducing leakage flux, preventing magnetic saturation, and increasing permeance and torque of the magnetic circuit.
【００４４】さらに、請求項６に記載の発明によれば、
固定子の巻線がパルス電流で励磁される請求項１，請求
項２，請求項３，請求項４又は請求項５に記載の回転電
機を励磁することで、高トルク化と外形の小形化を達成
することのできる、パルスモータを得ることができる。Further, according to the invention of claim 6,
By exciting the rotating electric machine according to claim 1, claim 2, claim 3, claim 4, or claim 5, the winding of the stator is excited by a pulse current, thereby increasing the torque and downsizing the outer shape. It is possible to obtain a pulse motor that can achieve the above.
【図１】本発明の請求項１，請求項２，請求項３及び請
求項６に記載の発明の回転電機の一実施例を示す断面
図。FIG. 1 is a cross-sectional view showing an embodiment of the rotating electric machine of the invention described in claim 1, claim 2, claim 3 and claim 6 of the present invention.
【図２】図１に示した回転電機に組み込まれた回転子の
一例を示す拡大斜視図。FIG. 2 is an enlarged perspective view showing an example of a rotor incorporated in the rotating electric machine shown in FIG.
【図３】本発明の請求項１，請求項２，請求項３及び請
求項６に記載の発明の回転電機の他の実施例を示す断面
図。FIG. 3 is a cross-sectional view showing another embodiment of the rotating electric machine of the invention described in claim 1, claim 2, claim 3 and claim 6 of the present invention.
【図４】本発明の請求項４に記載の発明の回転電機に組
み込まれる回転子の一実施例を示す斜視図。FIG. 4 is a perspective view showing an embodiment of a rotor incorporated in the rotating electric machine of the invention according to claim 4 of the present invention.
【図５】図４のＡ−Ａ断面図。5 is a cross-sectional view taken along the line AA of FIG.
【図６】本発明の請求項５に記載の発明の回転電機に組
み込まれる回転子の一実施例を示す断面図。FIG. 6 is a sectional view showing an embodiment of a rotor incorporated in the rotating electric machine of the invention according to claim 5 of the present invention.
【図７】従来の回転電機に組み込まれる回転子の一例を
示す斜視図。FIG. 7 is a perspective view showing an example of a rotor incorporated in a conventional rotating electric machine.
【図８】図７と異なる従来の回転電機の一例を示す断面
図。FIG. 8 is a cross-sectional view showing an example of a conventional rotary electric machine different from that of FIG. 7.
【図９】図８の回転電機に組み込まれる回転子を示す斜
視図。9 is a perspective view showing a rotor incorporated in the rotating electric machine of FIG.
１，11，21…回転軸、２Ａ，２Ｂ，12Ａ，12Ｂ，22Ａ，
22Ｂ…積層鉄心、２ａ…凹極部，３，13Ａ，13Ｂ，13Ｃ
…永久磁石、４…突極部、５，25…ボルト、６Ａ，６
Ｂ，16Ａ，16Ｂ…軸受ブラケット、７，17…固定子、７
ａ…固定子巻線、８，18…軸受、９，19…フレーム、10
…穴埋め片、22ａ…オーバハング部。1, 11, 21 ... Rotation axis, 2A, 2B, 12A, 12B, 22A,
22B ... laminated core, 2a ... concave pole portion, 3, 13A, 13B, 13C
… Permanent magnets, 4… Salient poles, 5, 25… Bolts, 6A, 6
B, 16A, 16B ... Bearing bracket, 7, 17 ... Stator, 7
a ... Stator winding, 8,18 ... Bearing, 9,19 ... Frame, 10
… Hole filling, 22a… Overhang part.
Claims (6)
の回転軸の外周に電磁鋼板の方向を前記回転軸と平行に
配設され外周に複数の突極部と凹極部が交互に形成され
た複数の積層鉄心と、この積層鉄心の間に挿着された永
久磁石とからなる回転電機。1. A rotary shaft that is provided coaxially with a stator, and a plurality of salient poles and concave poles are provided on the outer circumference of the rotary shaft so that the direction of the electromagnetic steel sheet is parallel to the rotary shaft. A rotary electric machine comprising a plurality of laminated iron cores formed alternately and permanent magnets inserted between the laminated iron cores.
の回転軸の外周に電磁鋼板の方向を前記回転軸と平行に
配設され前記電磁鋼板の間に高磁気抵抗材が挿入され外
周に複数の突極部と凹極部が交互に形成された複数の積
層鉄心と、この積層鉄心の間に挿着された永久磁石とか
らなる回転電機。2. A rotating shaft that is provided coaxially with the stator, and a magnetic reluctance member is disposed on the outer periphery of the rotating shaft so that the direction of the electromagnetic steel plate is parallel to the rotating shaft and a high magnetic resistance material is inserted between the electromagnetic steel plates. A rotary electric machine comprising a plurality of laminated iron cores having a plurality of salient pole portions and concave pole portions alternately formed on the outer periphery thereof and a permanent magnet inserted between the laminated iron cores.
の回転軸の外周に電磁鋼板の方向を前記回転軸と平行に
配設され前記電磁鋼板の間に高電気抵抗材が挿入され外
周に複数の突極部と凹極部が交互に形成された複数の積
層鉄心と、この積層鉄心の間に挿着された永久磁石とか
らなる回転電機。3. A rotary shaft that is provided coaxially with the stator, and a high electrical resistance material is provided on the outer periphery of the rotary shaft so that the direction of the magnetic steel sheet is parallel to the rotary shaft. A rotary electric machine comprising a plurality of laminated iron cores having a plurality of salient pole portions and concave pole portions alternately formed on the outer periphery thereof and a permanent magnet inserted between the laminated iron cores.
の回転軸の外周に電磁鋼板の方向を前記回転軸と平行に
配設され外周に複数の突極部と凹極部が交互に形成され
前記突極部にオーバハング部が突設された複数の積層鉄
心と、この積層鉄心の間に挿着された永久磁石とからな
る回転電機。4. A rotating shaft that is provided coaxially with the stator, and a plurality of salient pole portions and concave pole portions are provided on the outer periphery of the rotating shaft so that the direction of the electromagnetic steel sheet is parallel to the rotating shaft. A rotating electric machine comprising a plurality of laminated iron cores alternately formed with protruding overhang portions on the salient pole portions, and a permanent magnet inserted between the laminated iron cores.
求項１，請求項２，請求項３又は請求項５に記載の回転
電機。5. The rotary electric machine according to claim 1, wherein the concave pole portion is provided with a hole filling piece made of a non-magnetic material.
請求項１，請求項２，請求項３，請求項４又は請求項５
に記載の回転電機。6. The winding of the stator is excited by a pulsed current, claim 1, claim 2, claim 3, claim 4 or claim 5.
The rotating electric machine described in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6102497A JPH07312858A (en) | 1994-05-17 | 1994-05-17 | Rotary electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6102497A JPH07312858A (en) | 1994-05-17 | 1994-05-17 | Rotary electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07312858A true JPH07312858A (en) | 1995-11-28 |
Family
ID=14329057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6102497A Pending JPH07312858A (en) | 1994-05-17 | 1994-05-17 | Rotary electric machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07312858A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002315285A (en) * | 2001-04-11 | 2002-10-25 | Sawafuji Electric Co Ltd | Brushless alternator |
| JP2008043043A (en) * | 2006-08-04 | 2008-02-21 | Daikin Ind Ltd | Rotary electric machine |
-
1994
- 1994-05-17 JP JP6102497A patent/JPH07312858A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002315285A (en) * | 2001-04-11 | 2002-10-25 | Sawafuji Electric Co Ltd | Brushless alternator |
| JP2008043043A (en) * | 2006-08-04 | 2008-02-21 | Daikin Ind Ltd | Rotary electric machine |
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