JPH11299196A - Small-sized motor - Google Patents
Small-sized motorInfo
- Publication number
- JPH11299196A JPH11299196A JP9890598A JP9890598A JPH11299196A JP H11299196 A JPH11299196 A JP H11299196A JP 9890598 A JP9890598 A JP 9890598A JP 9890598 A JP9890598 A JP 9890598A JP H11299196 A JPH11299196 A JP H11299196A
- Authority
- JP
- Japan
- Prior art keywords
- poles
- rotor
- magnetic pole
- magnetic
- magnetic poles
- 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
- 238000004804 winding Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims 1
- 230000004907 flux Effects 0.000 abstract description 15
- 230000000717 retained effect Effects 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Landscapes
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、巻線を巻回して磁
極を形成した固定子と、永久磁石の磁極を備えた回転子
とからなる小形電動機の改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a small motor comprising a stator having magnetic poles formed by winding windings and a rotor having magnetic poles of permanent magnets.
【０００２】[0002]
【従来の技術】図９は従来から実施されている小形電動
機の構造を示す断面図で、図１０はこの小形電動機に使
用する永久磁石回転子４４の磁化状態を示す斜視図であ
る。2. Description of the Related Art FIG. 9 is a sectional view showing the structure of a conventional small motor, and FIG. 10 is a perspective view showing a magnetized state of a permanent magnet rotor 44 used in the small motor.
【０００３】図９（ａ）において４１、４２は、磁性部
材を椀形に形成した固定子の外筐で、外筐４１、４２の
軸方向の端面から、複数の磁極４１ａ、４２ａを、抜き
起こし加工により交互に軸方向に交叉するよう突出さ
せ、図９（ｂ）のようにＮ極、Ｓ極を交互に形成させた
のち、縁部を当接させて固着し磁極４１ａと４２ａの外
周に固定子巻線４３を巻装して固定子を形成している。
また固定子の内径部に、空隙を介し永久磁石で形成した
回転子４４を、回転子軸４５と共に軸受４６と軸受４７
により回転自在に軸支している。In FIG. 9A, reference numerals 41 and 42 denote outer casings of a stator in which magnetic members are formed in a bowl shape. A plurality of magnetic poles 41a and 42a are extracted from axial end faces of the outer casings 41 and 42. 9B, the N pole and the S pole are alternately formed, and the edges are abutted and fixed, and the outer circumferences of the magnetic poles 41a and 42a are formed. , A stator winding 43 is wound therearound to form a stator.
Further, a rotor 44 formed of a permanent magnet through an air gap is provided on the inner diameter portion of the stator together with a rotor shaft 45 in bearings 46 and 47.
It is rotatably supported by.
【０００４】固定子の磁極４１ａと４２ａは、対向する
永久磁石回転子４４と同一のピッチ角度で形成してお
り、固定子巻線４３に適宜の交流を通電することによ
り、磁極４１ａと４２ａの間に発生する交流と同期した
交番磁束と、対向する回転子４４の永久磁石の磁極とが
作用し、交流と同期した速度で回転子４４が回転する。[0004] The magnetic poles 41a and 42a of the stator are formed at the same pitch angle as that of the opposing permanent magnet rotor 44, and an appropriate alternating current is applied to the stator winding 43 so that the magnetic poles 41a and 42a are formed. The alternating magnetic flux synchronized with the alternating current generated therebetween and the magnetic poles of the permanent magnets of the rotor 44 facing each other act, and the rotor 44 rotates at a speed synchronized with the alternating current.
【０００５】[0005]
【発明が解決しようとする課題】従来技術の固定子と回
転子の間の磁束の関係を模式的に示す図１１と、固定子
磁極間の磁束の流れを示す図１２によれば、固定子の磁
極４１ａと４２ａが交互に交叉して配置されているの
で、固定子巻線４３に通電して発生した磁束Ｍの一部は
固定子磁極４１ａと４２ａの間の空間に流れ、対向する
回転子４４の永久磁石と作用しないので効率が低いとい
う問題がある。本発明は固定子磁極に発生した磁束Ｍが
固定子磁極の間での漏れを減少するようし、回転子の永
久磁石と有効に作用して効率の高い小型電動機を得るこ
とを目的としている。According to FIG. 11 schematically showing the relationship between the magnetic flux between the stator and the rotor of the prior art and FIG. 12 showing the flow of the magnetic flux between the stator magnetic poles, FIG. Magnetic poles 41a and 42a are alternately arranged so that a part of the magnetic flux M generated by energizing the stator winding 43 flows into the space between the stator magnetic poles 41a and 42a, and the rotation of There is a problem that the efficiency is low because it does not act on the permanent magnet of the armature 44. SUMMARY OF THE INVENTION It is an object of the present invention to reduce the leakage of magnetic flux M generated at the stator magnetic poles between the stator magnetic poles, and to effectively work with the permanent magnets of the rotor to obtain a highly efficient small motor.
【０００６】[0006]
【課題を解決するための手段】上記の目的は、基本的な
構造として、中空円筒形永久磁石の外周に沿いＮ極、Ｓ
極を交互に、かつ、中空円筒の表裏面を同極に磁化し、
回転自在に軸支した回転子と、回転子の中空円筒外周面
と内周面に対して、それぞれ空隙を介して対向し、永久
磁石に磁化した磁極のピッチ角度の２倍のピッチ角度で
円周方向に設けた外側磁極と内側磁極を備え、この外側
磁極と内側磁極は、回転子磁極のピッチ角度だけずらし
て交互に配置された小型電動機によって達成される。SUMMARY OF THE INVENTION The above-mentioned object is achieved by, as a basic structure, an N-pole and an S-pole along the outer periphery of a hollow cylindrical permanent magnet.
Alternate the poles, and magnetize the front and back surfaces of the hollow cylinder to the same polarity,
The rotor is rotatably supported, and faces the outer peripheral surface and the inner peripheral surface of the hollow cylinder of the rotor via a gap, respectively, at a pitch angle twice as large as the pitch angle of the magnetic pole magnetized by the permanent magnet. An outer magnetic pole and an inner magnetic pole are provided in the circumferential direction, and the outer magnetic pole and the inner magnetic pole are attained by small motors alternately arranged at a pitch angle of the rotor magnetic poles.
【０００７】また、前記回転子と、この回転子磁極に微
小間隔を隔てて互いに対向するよう挟設し、円周方向に
ｎ組に分割して配置した外側磁極と内側磁極からなる固
定子磁極を有し、このｎ組の固定子磁極の配置は、回転
子磁極のピッチ角度の１／ｎ角度ずつ、円周方向にずら
して設定することにより小型電動機を構成することも可
能である。上記の構成により、固定子磁極の間の漏洩磁
束が少なく効率のよい小型電動機が得られる。[0007] Further, the rotor and a stator magnetic pole comprising an outer magnetic pole and an inner magnetic pole, which are sandwiched between the rotor magnetic poles at a minute interval so as to face each other and divided into n sets in the circumferential direction. The arrangement of the n sets of stator magnetic poles can be configured to be shifted in the circumferential direction by 1 / n angle of the pitch angle of the rotor magnetic poles, thereby making it possible to constitute a small motor. According to the above configuration, a small-sized electric motor with less leakage magnetic flux between the stator magnetic poles and high efficiency can be obtained.
【０００８】[0008]
【発明の実施の形態】本発明の実施の形態を図面に基づ
いて説明する。 〈第１の実施の形態〉図１は、本発明に係る小形電動機
の基本となる第１の実施の形態の構造を示す断面図、図
２は、本発明に係る小形電動機の第１の実施の形態の回
転子の磁化状態を示す斜視図である。図１（ａ）におい
て、１、２は磁性部材を椀形に形成した固定子の外筐で
あって、外筐１、２の軸方向端面に複数の固定子の内側
磁極１ａと外側磁極２ａを、それぞれ、抜き起こし加工
により軸方向に形成し、外側磁極２ａの内径寸法は、内
側磁極１ａの外径寸法より大きく設定すると共に、例え
ば、図１（ｂ）のように、内側磁極１ａと外側磁極２ａ
は円周方向にＮ極とＳ極をそれぞれ形成し、Ｎ極と、Ｓ
極とは、同一のピッチ角度２αによって、交互に配列さ
れるようにし、外側磁極２ａの外周と外筐１、２の内周
との間に巻線３を巻回している。回転子４は、図１に示
すように椀状の断面を有し、かつ図２のように、中空円
筒の円周方向に沿ってピッチ角度αで交互に、永久磁石
のＮ極とＳ極を形成するよう表裏面同極に磁化され、固
定子の磁極１ａと磁極２ａとの間に、空隙を介して回転
子４のＮ極、Ｓ極が挟持され、軸受６、７に支承された
回転子軸５により回転自在に支承されている。Embodiments of the present invention will be described with reference to the drawings. <First Embodiment> FIG. 1 is a cross-sectional view showing the structure of a first embodiment which is the basis of a small electric motor according to the present invention, and FIG. 2 is a first embodiment of a small electric motor according to the present invention. FIG. 7 is a perspective view showing a magnetized state of the rotor according to the embodiment. In FIG. 1A, reference numerals 1 and 2 denote outer casings of a stator in which a magnetic member is formed in a bowl shape. Are formed in the axial direction by punching and raising, the inner diameter of the outer magnetic pole 2a is set to be larger than the outer diameter of the inner magnetic pole 1a, and, for example, as shown in FIG. Outer magnetic pole 2a
Forms an N-pole and an S-pole in the circumferential direction, respectively.
The poles are arranged alternately at the same pitch angle 2α, and the winding 3 is wound between the outer circumference of the outer magnetic pole 2 a and the inner circumference of the outer casings 1 and 2. The rotor 4 has a bowl-shaped cross section as shown in FIG. 1 and, as shown in FIG. 2, alternately has a north pole and a south pole of the permanent magnet at a pitch angle α along the circumferential direction of the hollow cylinder. , And the N and S poles of the rotor 4 are sandwiched between the magnetic poles 1a and 2a of the stator via a gap, and are supported by the bearings 6 and 7. It is rotatably supported by a rotor shaft 5.
【０００９】図１（ｂ）に示すように、内側磁極１ａ、
及び外側磁極２ａのピッチ角度２αは、永久磁石回転子
４の磁極のピッチ角度αの２倍となるよう設置されてい
るから、内側磁極１ａと隣接する外側磁極２ａ間のピッ
チ角度αは、永久磁石の磁極のピッチ角度αと等しくな
る。As shown in FIG. 1B, the inner magnetic poles 1a,
And the pitch angle 2α of the outer magnetic pole 2a is set to be twice the pitch angle α of the magnetic pole of the permanent magnet rotor 4, so that the pitch angle α between the inner magnetic pole 1a and the adjacent outer magnetic pole 2a is permanent. It becomes equal to the pitch angle α of the magnetic poles of the magnet.
【００１０】本発明に係る小形電動機の固定子磁極１ａ
及び２ａと回転子の永久磁石との関係を模式的に示すと
図３のようになり、永久磁石回転子４を挾んで、固定子
の内側磁極１ａと外側磁極２ａが配置されているから、
図４に示すように、内側磁極１ａの磁束は、回転子４の
外径側空隙を介し、永久磁石４を通って外側磁極２ａに
流れ、外側磁極２ａから内径側空隙を介し、永久磁石４
に流入するから、内側磁極１ａと外側磁極２ａ間に流れ
る漏れ磁束はなくなり効率の高い電動機を形成すること
ができる。[0010] The stator magnetic pole 1a of the small motor according to the present invention.
FIG. 3 schematically shows the relationship between the permanent magnet 2a and the permanent magnet of the rotor, and the inner magnetic pole 1a and the outer magnetic pole 2a of the stator are arranged with the permanent magnet rotor 4 interposed therebetween.
As shown in FIG. 4, the magnetic flux of the inner magnetic pole 1 a flows through the outer diameter gap of the rotor 4, flows through the permanent magnet 4 to the outer magnetic pole 2 a, and flows from the outer magnetic pole 2 a through the inner diameter gap to the permanent magnet 4.
, The leakage magnetic flux flowing between the inner magnetic pole 1a and the outer magnetic pole 2a is eliminated, and a highly efficient electric motor can be formed.
【００１１】〈第２の実施の形態〉図５は、本発明に係
る小形電動機の第２の実施の形態の構成を示す断面図で
ある。図５の構成は図１に示した小形電動機を軸方向に
２個連接した２相の小型電動機である。この場合、１個
のボビンに１相分のコイルを巻回してシンクロナスモー
タ、１個のボビンに２相分のコイルを巻回してステッピ
ングモータを構成することができる。一般的には、図１
に示した小形電動機ｎ個を連設して配置し、ｎ相の小形
電動機を構成する。すなわち、図５に例示したｎ＝２は
２相（４相）を示し、ｎ＝３とならば３相、ｎ＝５なら
ば５相の電動機が構成される。<Second Embodiment> FIG. 5 is a sectional view showing the structure of a small electric motor according to a second embodiment of the present invention. The configuration of FIG. 5 is a two-phase small motor in which two small motors shown in FIG. 1 are connected in the axial direction. In this case, a stepper motor can be formed by winding a coil for one phase around one bobbin and winding a coil for two phases around one bobbin. Generally, FIG.
Are arranged in series to form an n-phase small motor. That is, n = 2 illustrated in FIG. 5 indicates two-phase (four-phase), and if n = 3, a three-phase motor is formed, and if n = 5, a five-phase motor is configured.
【００１２】図５において、図示左側の固定子Ａは、図
１に示したものと同じであり、図示右側の固定子Ｂを固
定子Ａと対称的に結合すると共に、Ａ相の固定子磁極と
Ｂ相の固定子磁極の位置を、永久磁石の磁極のピッチ角
度の１／２相当分だけずらせて固着したものである。一
般的にｎ個を連設配置したｎ相の小形電動機の場合に
は、永久磁石の磁極のピッチ角度の１／ｎ相当分だけず
らせるものである。固定子の外筐１１、１２、外側磁極
１２ａ、内側磁極１１ａ、及び、巻線１３は図１と同様
に巻回して配置され、回転子１４の永久磁石は固定子Ａ
と固定子Ｂに対応する幅寸法として回転子軸１５と一体
に固着し、軸受１６、１７によって支承されている。本
実施の形態は正逆回転制御可能な構造を有する。In FIG. 5, a stator A on the left side of the figure is the same as that shown in FIG. 1, and a stator B on the right side of the figure is symmetrically coupled to the stator A, and an A-phase stator magnetic pole is provided. And the B-phase stator magnetic poles are shifted and fixed by a distance corresponding to 1/2 of the pitch angle of the magnetic poles of the permanent magnet. Generally, in the case of an n-phase small motor in which n units are arranged in series, the motor is shifted by an amount corresponding to 1 / n of the pitch angle of the magnetic poles of the permanent magnets. The outer casings 11, 12 of the stator, the outer magnetic pole 12a, the inner magnetic pole 11a, and the winding 13 are wound and arranged as in FIG. 1, and the permanent magnet of the rotor 14 is the stator A
And a width dimension corresponding to the stator B, which is integrally fixed to the rotor shaft 15 and supported by bearings 16 and 17. This embodiment has a structure capable of controlling forward and reverse rotation.
【００１３】〈第３の実施の形態〉本発明に係る小形電
動機の第３の実施の形態は、図示しないが、第２の実施
の形態にと同様に、図１に示した固定子２個を軸方向に
連接して２相の小形電動機を構成するものであるが、固
定子Ａと固定子Ｂを対称的に軸方向に連接する際、Ａ相
の固定子磁極とＢ相の固定子磁極のピッチ角度は同一の
位置関係とし、回転子１４の永久磁石を固定子Ａ側と固
定子Ｂ側とで別々に形成し、かつ、相互のピッチ角度の
１／２相当分ずらせることによって、第２の実施の形態
と同一の効果を得ることが可能である。<Third Embodiment> A third embodiment of a small electric motor according to the present invention is not shown, but is similar to the second embodiment in that the two stators shown in FIG. Are connected in the axial direction to form a two-phase small motor, but when the stator A and the stator B are connected symmetrically in the axial direction, the A-phase stator magnetic poles and the B-phase stator The pitch angles of the magnetic poles are set to the same positional relationship, and the permanent magnets of the rotor 14 are separately formed on the stator A side and the stator B side, and are separated from each other by 相当 of the mutual pitch angle. It is possible to obtain the same effect as in the second embodiment.
【００１４】〈第４の実施の形態〉図６は、本発明に係
る小形電動機の第４の実施の形態の構成を示す断面図で
ある。図４に示した構成は、固定子の外側磁極２１と内
側磁極２２を連結するヨーク部２８が軸受２６の外周に
配置され、ヨーク部２８の外周に固定子巻線２３が巻装
され、ヨーク部２８の軸方向の両端面に当接し、同心上
に配置された２個の半径の異なる椀形の磁性部材の外周
面軸方向に延びる複数の外側磁極２１と内側磁極２２を
形成し、外側磁極２１が形成する円環と内側磁極２２が
形成する円環との間に、空隙を介して対向し、中空円筒
状の永久磁石の外周に沿ってＮ、Ｓ極を交互に、かつ、
前記中空円筒の表裏面が同極となるように磁化し、回転
自在に軸支された回転子２４を配置してある。<Fourth Embodiment> FIG. 6 is a sectional view showing the structure of a small electric motor according to a fourth embodiment of the present invention. In the configuration shown in FIG. 4, a yoke portion 28 that connects the outer magnetic pole 21 and the inner magnetic pole 22 of the stator is arranged on the outer periphery of the bearing 26, and the stator winding 23 is wound around the outer periphery of the yoke portion 28. A plurality of outer magnetic poles 21 and inner magnetic poles 22 abutting on both axial end surfaces of the portion 28 and extending in the axial direction of the outer peripheral surface of two concentrically arranged bowl-shaped magnetic members having different radii are formed. The ring formed by the magnetic pole 21 and the ring formed by the inner magnetic pole 22 face each other with an air gap therebetween, and alternately have N and S poles along the outer circumference of the hollow cylindrical permanent magnet, and
The rotor 24 is magnetized so that the front and back surfaces of the hollow cylinder have the same polarity, and the rotor 24 is rotatably supported.
【００１５】第１〜第３の実施の形態の場合では、固定
子外筐の内径側と外側の磁極との間に巻線が巻回され、
回転子の永久磁石が外側の磁極の内周側に配置されてい
るのに対し、この第４の実施の形態は、外側の磁極は外
筐に設けられているため、この外側の磁極と内側の磁極
との間隙に、永久磁石回転子を配置することができ、こ
れにより回転子の中空円筒直径の寸法を大きくすること
ができるので、大きなトルクが得られるという特徴を有
する。In the first to third embodiments, the winding is wound between the inner and outer magnetic poles of the stator outer casing,
While the permanent magnet of the rotor is arranged on the inner peripheral side of the outer magnetic pole, in the fourth embodiment, since the outer magnetic pole is provided in the outer casing, the outer magnetic pole is connected to the inner magnetic pole. Since the permanent magnet rotor can be arranged in the gap between the magnetic poles of the rotor and the diameter of the hollow cylindrical diameter of the rotor can be increased, a large torque can be obtained.
【００１６】〈第５の実施の形態〉図７は、本発明に係
る小形電動機の第５の実施の形態の構成を示す断面図、
図６は図７のＡ―Ａ’線に沿った断面図である。図７、
図８において外側磁極３１は椀形に形成され、外側磁極
３１の外周円を３分割して３個の外側磁極３１Ｕ、３１
Ｖ、３１Ｗが設けられ、外側磁極３１Ｕ、３１Ｖ、３１
Ｗの内周面に等間隔に外極歯３３が設けられている。ま
た外側磁極３１Ｕ、３１Ｖ、３１Ｗより小径の内側磁極
３２Ｕ、３２Ｖ、３２Ｗが外側磁極３１Ｕ、３１Ｖ、３
１Ｗと対向する位置に設けられている。また内側磁極３
２Ｕ、３２Ｖ、３２Ｗの外周面に等間隔に内極歯３４が
設けられている。<Fifth Embodiment> FIG. 7 is a sectional view showing the structure of a small electric motor according to a fifth embodiment of the present invention.
FIG. 6 is a cross-sectional view along the line AA ′ in FIG. FIG.
In FIG. 8, the outer magnetic pole 31 is formed in a bowl shape, and the outer circumferential circle of the outer magnetic pole 31 is divided into three to form three outer magnetic poles 31U and 31U.
V, 31W, and the outer magnetic poles 31U, 31V, 31
Outer pole teeth 33 are provided at equal intervals on the inner peripheral surface of W. Also, the inner magnetic poles 32U, 32V, 32W having a smaller diameter than the outer magnetic poles 31U, 31V, 31W are connected to the outer magnetic poles 31U, 31V, 3W.
It is provided at a position facing 1W. Also the inner magnetic pole 3
Inner pole teeth 34 are provided at equal intervals on the outer peripheral surface of 2U, 32V, 32W.
【００１７】外側磁極３１Ｕ、３１Ｖ、３１Ｗと、内側
磁極３２Ｕ、３２Ｖ、３２Ｗとは同心に配置され、中心
から所定の距離に巻線３７を巻装した磁極芯３８を配置
し、磁極芯３８の両端面を外側磁極３１と内側磁極３２
に当接させて固着している。The outer magnetic poles 31U, 31V, 31W and the inner magnetic poles 32U, 32V, 32W are arranged concentrically, and a magnetic pole core 38 wound with a winding 37 at a predetermined distance from the center is arranged. Both end surfaces are the outer magnetic pole 31 and the inner magnetic pole 32
And affixed.
【００１８】永久磁石回転子３５は、外側磁極３１の内
周と内側磁極３２の外周との間に、空隙を介して中空円
筒状に形成した永久磁石の外円周方向に、Ｎ、Ｓ極を交
互に、かつ、前記中空円筒の表裏面が同極となるように
磁化されており、軸受３６によって回転自在に軸支され
ている。The permanent magnet rotator 35 has N, S poles in the outer circumferential direction of a hollow cylindrical permanent magnet formed between the inner circumference of the outer magnetic pole 31 and the outer circumference of the inner magnetic pole 32 via a gap. Are alternately magnetized so that the front and back surfaces of the hollow cylinder have the same polarity, and are rotatably supported by bearings 36.
【００１９】そして、外側磁極３１の外極歯３３と内側
磁極３２の内極歯３４のそれぞれのピッチは回転子３５
の永久磁石の磁極ピッチの２倍となるように設けられて
いるから、外側磁極３１の外極歯３３と内側磁極３２の
内極歯３４とのピッチは永久磁石回転子３５の永久磁石
のピッチと同じとなる。The pitch between the outer pole teeth 33 of the outer magnetic pole 31 and the inner pole teeth 34 of the inner magnetic pole 32 is equal to the pitch of the rotor 35.
The pitch between the outer pole teeth 33 of the outer magnetic pole 31 and the inner pole teeth 34 of the inner magnetic pole 32 is equal to the pitch of the permanent magnet of the permanent magnet rotor 35. Is the same as
【００２０】図８に示すように、本実施の形態におい
て、固定子の外側磁極３１は、３１Ｕと３１Ｖと３１Ｗ
の３極が設けられ、内側磁極３２も外側磁極３１と同様
に３２Ｕと３２Ｖと３２Ｗとが設けられ、外側磁極３１
Ｕに通電した場合には磁極芯３８ＵがＮ極に磁化し、外
側磁極３１の外極歯３３から外側空隙を介して磁束が永
久磁石に入りＳ極と対向して隣接したＮ極より内側空隙
を介して内側磁極３２の内極歯３４に至り、外側磁極３
１の外極歯３３と永久磁石３９の磁極と内側磁極３２の
内極歯３４とがそれぞれ対向している。本実施の形態で
は、３組の固定子磁極、すなわち、外側磁極３１と内側
磁極３２の各配置角度は、共に、円周方向に永久磁石回
転子３５の磁極のピッチ角度の１／３の角度ずつ、順に
ずらして設定されている。As shown in FIG. 8, in this embodiment, the outer magnetic poles 31 of the stator are 31U, 31V and 31W.
The inner magnetic pole 32 is provided with 32U, 32V, and 32W similarly to the outer magnetic pole 31, and the outer magnetic pole 31 is provided.
When U is energized, the magnetic pole core 38U is magnetized to the N pole, and the magnetic flux enters the permanent magnet from the outer pole teeth 33 of the outer magnetic pole 31 via the outer gap, and the inner gap from the N pole adjacent to and facing the S pole. Through the inner magnetic pole 32 of the inner magnetic pole 32 and the outer magnetic pole 3
The first outer pole tooth 33, the magnetic pole of the permanent magnet 39, and the inner pole tooth 34 of the inner magnetic pole 32 face each other. In the present embodiment, the arrangement angles of the three stator poles, that is, the outer magnetic pole 31 and the inner magnetic pole 32, are all equal to one third of the pitch angle of the magnetic poles of the permanent magnet rotor 35 in the circumferential direction. Are shifted in order.
【００２１】上記の状態では外側磁極３１Ｖの外極歯３
３及び内側磁極３２Ｖの内極歯３４と対向する永久磁石
回転子３５の磁極との関係は、永久磁石回転子３５の磁
極ピッチの１／３の角度が重なっている。同様に外側磁
極３１Ｗの極歯３３及び内側磁極３２Ｗの極歯３４と対
向する永久磁石回転子３５の磁極との関係は、永久磁石
の磁極ピッチの１／３の角度重なっている。本実施の形
態は、正逆回転制御が可能であり、また、図示は３相の
並列構造を示したが、一般に多相構造とすることも可能
である。In the above state, the outer pole teeth 3 of the outer magnetic pole 31V
The relationship between the inner pole 3 and the inner pole 32 of the inner magnetic pole 32V and the magnetic pole of the permanent magnet rotor 35 facing each other is such that the angle of the magnetic pole pitch of the permanent magnet rotor 35 is 1/3. Similarly, the relationship between the pole teeth 33 of the outer magnetic pole 31W and the pole teeth 34 of the inner magnetic pole 32W and the magnetic poles of the permanent magnet rotor 35 facing each other has an angle overlap of 1/3 of the magnetic pole pitch of the permanent magnet. In the present embodiment, forward / reverse rotation control is possible, and a three-phase parallel structure is shown in the figure, but a multi-phase structure may be used in general.
【００２２】図８に示す第５の実施の形態において、通
電する固定子巻線をＵ、Ｖ、Ｗと順次移すことにより回
転子が永久磁石３９の磁極ピッチの１／３の角度回転し
ステッピングモータとして動作する。In the fifth embodiment shown in FIG. 8, the rotor is rotated by an angle of 1/3 of the magnetic pole pitch of the permanent magnet 39 by sequentially shifting the current-carrying stator windings to U, V, and W, and stepping is performed. Operates as a motor.
【００２３】[0023]
【発明の効果】本発明の実施により、固定子は、隣接す
る固定磁極の間における磁束の漏れがなく効率の高い小
型電動機を提供することができる。As described above, according to the present invention, the stator can provide a small-sized electric motor having high efficiency without leakage of magnetic flux between adjacent fixed magnetic poles.
【図１】本発明に係る小形電動機の第１の実施の形態の
構造を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing a structure of a small electric motor according to a first embodiment of the present invention.
【図２】本発明の第１の実施の形態の回転子の磁化状態
を示す斜視図である。FIG. 2 is a perspective view showing a magnetized state of the rotor according to the first embodiment of the present invention.
【図３】本発明の第１の実施の形態の回転子と固定子の
磁極関係を示す模式図である。FIG. 3 is a schematic diagram illustrating a magnetic pole relationship between a rotor and a stator according to the first embodiment of the present invention.
【図４】本発明の第１の実施の形態の回転子と固定子の
磁極間の磁束の流れを示す図である。FIG. 4 is a diagram illustrating a flow of a magnetic flux between magnetic poles of a rotor and a stator according to the first embodiment of the present invention.
【図５】本発明に係る小形電動機の第２の実施の形態の
構造を示す縦断面図である。FIG. 5 is a longitudinal sectional view showing a structure of a small electric motor according to a second embodiment of the present invention.
【図６】本発明に係る小形電動機の第４の実施の形態の
構造を示す縦断面図である。FIG. 6 is a longitudinal sectional view showing a structure of a small electric motor according to a fourth embodiment of the present invention.
【図７】本発明に係る小形電動機の第５の実施の形態の
構造を示す縦断面図である。FIG. 7 is a longitudinal sectional view showing the structure of a small electric motor according to a fifth embodiment of the present invention.
【図８】本発明に係る小形電動機の第５の実施の形態の
平断面図である。FIG. 8 is a plan sectional view of a small electric motor according to a fifth embodiment of the present invention.
【図９】従来の小形電動機の構造を示す縦断面図であ
る。FIG. 9 is a longitudinal sectional view showing the structure of a conventional small electric motor.
【図１０】従来の小形電動機の回転子の磁化状態を示す
斜視図である。FIG. 10 is a perspective view showing a magnetized state of a rotor of a conventional small electric motor.
【図１１】従来の小形電動機の回転子と固定子の磁極関
係を示す模式図である。FIG. 11 is a schematic diagram showing a magnetic pole relationship between a rotor and a stator of a conventional small motor.
【図１２】従来の小形電動機の回転子と固定子の磁極間
の磁束の流れを示す図である。FIG. 12 is a diagram showing a flow of magnetic flux between magnetic poles of a rotor and a stator of a conventional small electric motor.
１…固定子外匡 １ａ…固定子磁極 ２…固定子外匡 ２ａ…固定子磁極 ３…固定子巻線 ４…回転子 ５…回転子軸 ６、７…軸受 １１…固定子外匡 １１ａ…内側磁極 １２…固定子外匡 １２ａ…外側磁極 １３…固定子巻線 １４…回転子 １５…回転子軸 １６、１７…軸受 ２１ａ…外側磁極 ２２ａ…内側磁極 ２３…固定子巻線 ２４…永久磁石回
転子 ２５…回転子軸 ２６…軸受 ２８…ヨーク部 ３１Ｕ、３１Ｖ、３１Ｗ…外側磁極 ３２Ｕ、３１Ｖ、３１Ｗ…内側磁極 ３３…外極歯 ３４…内極歯 ３５…回転子 ３６…回転子軸 ３７…巻線 ３８…磁極芯 ４１、４２…固定子外筺 ４１ａ、４２ａ…固定子磁極 ４３…固定子巻線 ４４…回転子 ４５…回転子軸 ４６、４７…軸受DESCRIPTION OF SYMBOLS 1 ... Stator outer housing 1a ... Stator magnetic pole 2 ... Stator outer housing 2a ... Stator magnetic pole 3 ... Stator winding 4 ... Rotor 5 ... Rotor shaft 6, 7 ... Bearing 11 ... Stator outer housing 11a ... Inner magnetic pole 12 ... Stator outer casing 12a ... Outer magnetic pole 13 ... Stator winding 14 ... Rotor 15 ... Rotor shaft 16, 17 ... Bearing 21a ... Outer magnetic pole 22a ... Inner magnetic pole 23 ... Stator winding 24 ... Permanent magnet Rotor 25 ... Rotor shaft 26 ... Bearing 28 ... Yoke part 31U, 31V, 31W ... Outside magnetic pole 32U, 31V, 31W ... Inner magnetic pole 33 ... Outer pole tooth 34 ... Inner pole tooth 35 ... Rotator 36 ... Rotator shaft 37 ... Winding 38 ... Magnetic pole cores 41, 42 ... Stator outer housing 41a, 42a ... Stator magnetic pole 43 ... Stator winding 44 ... Rotor 45 ... Rotor shaft 46, 47 ... Bearing
Claims (4)
極とＳ極を交互に円周方向に配置した回転子磁極を有す
る回転子と、 前記回転子磁極に微小間隔を隔てて挟設し、ｐ個のＮ極
を環状に分割配置した外側磁極とｐ個のＳ極を環状に配
置した内側磁極とからなる固定子磁極を有し、 前記外側磁極と内側磁極は、それぞれ、前記回転子磁極
のピッチ角度の２倍のピッチ角度を有すると共に、 前記外側磁極と内側磁極とは、前記回転子磁極のピッチ
角度だけずらして交互に配置されていることを特徴とす
る小型電動機。1. An N-shape so that the front and back surfaces of a hollow cylinder have the same polarity.
A rotor having rotor magnetic poles in which poles and S poles are alternately arranged in the circumferential direction; and an outer magnetic pole which is sandwiched between the rotor magnetic poles at a small interval and in which p N poles are annularly divided and arranged. a stator magnetic pole comprising an inner magnetic pole in which p S poles are arranged in an annular shape, wherein the outer magnetic pole and the inner magnetic pole each have a pitch angle twice as large as the pitch angle of the rotor magnetic pole; A small electric motor, wherein outer magnetic poles and inner magnetic poles are alternately arranged by being shifted by a pitch angle of the rotor magnetic poles.
に２組連接すると共に、前記回転子の軸方向に前記回転
子磁極のピッチ角度の１／２の角度ずらして配置したこ
とを特徴とする小形電動機。2. The method according to claim 1, wherein two sets of the stator magnetic poles are connected in the axial direction of the rotor, and are arranged so as to be shifted by half the pitch angle of the rotor magnetic poles in the axial direction of the rotor. Features a small electric motor.
とＳ極を交互に円周方向に配置した回転子磁極を有する
回転子と、 前記回転子を支承する軸受の近傍に固定子の巻線を巻回
したヨーク部と、 このヨーク部に軸方向に当接し、互いに同心上に配置さ
れた半径の異なる椀形の磁性部材の外円周に形成され、
かつ、前記回転子磁極に微小間隔を隔てて挟設し、ｐ個
のＮ極を連設した前記外側磁極とｐ個のＳ極を連設した
前記内側磁極とからなる固定子磁極を有することを特徴
とする請求項１記載の小型電動機。3. A rotor having rotor magnetic poles in which N poles and S poles are alternately arranged in a circumferential direction so that the front and back surfaces of a hollow cylinder have the same polarity, and a vicinity of a bearing that supports the rotor. A yoke portion around which the stator winding is wound, and formed on the outer circumference of a bowl-shaped magnetic member having a different radius and abutting on the yoke portion in the axial direction and arranged concentrically with each other;
And a stator magnetic pole which is sandwiched between the rotor magnetic poles at a small interval and has the outer magnetic pole having p number of N poles connected thereto and the inner magnetic pole having p number of S poles connected continuously. The small electric motor according to claim 1, wherein:
とＳ極を交互に円周方向に配置した回転子磁極を有する
回転子と、 互いに同心上に配置された半径の異なる椀形の磁性部材
の外円周に形成され、かつ、前記回転子磁極に微小間隔
を隔てて互いに対向するよう挟設し、円周方向にｎ組に
分割して配置した外側磁極と内側磁極からなる固定子磁
極とを有し、 前記外側磁極と内側磁極の間に前記回転子の軸方向と平
行に設けた磁極芯に巻線を巻回し、 前記ｎ組の固定子磁極の配置は、前記回転子磁極のピッ
チ角度の１／ｎ角度ずつ、円周方向にずらして設定され
たことを特徴とする小形電動機。4. A rotor having rotor magnetic poles in which N poles and S poles are alternately arranged in the circumferential direction so that the front and back surfaces of a hollow cylinder have the same polarity, and different radii arranged concentrically with each other. Outer magnetic poles and inner magnetic poles formed on the outer circumference of a bowl-shaped magnetic member, sandwiched between the rotor magnetic poles at a small interval so as to face each other, and divided into n sets in the circumferential direction. A stator magnetic pole comprising: a winding wound around a magnetic pole core provided in parallel with the axial direction of the rotor between the outer magnetic pole and the inner magnetic pole, and the arrangement of the n sets of stator magnetic poles includes: A small electric motor, which is set so as to be shifted in the circumferential direction by 1 / n of the pitch angle of the rotor magnetic poles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9890598A JPH11299196A (en) | 1998-04-10 | 1998-04-10 | Small-sized motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9890598A JPH11299196A (en) | 1998-04-10 | 1998-04-10 | Small-sized motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11299196A true JPH11299196A (en) | 1999-10-29 |
Family
ID=14232155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9890598A Pending JPH11299196A (en) | 1998-04-10 | 1998-04-10 | Small-sized motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11299196A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002354769A (en) * | 2001-05-30 | 2002-12-06 | Japan Servo Co Ltd | Inductor motor |
| JP2007336775A (en) * | 2006-06-19 | 2007-12-27 | Japan Servo Co Ltd | Multiphase claw pole motor |
-
1998
- 1998-04-10 JP JP9890598A patent/JPH11299196A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002354769A (en) * | 2001-05-30 | 2002-12-06 | Japan Servo Co Ltd | Inductor motor |
| JP2007336775A (en) * | 2006-06-19 | 2007-12-27 | Japan Servo Co Ltd | Multiphase claw pole motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2652080B2 (en) | Hybrid type stepping motor | |
| JP4723118B2 (en) | Rotating electric machine and pulley drive device using the rotating electric machine | |
| JP3071392B2 (en) | Hybrid type step motor | |
| JPH11225466A (en) | Polyphese outer rotor pm stepping motor | |
| US4714853A (en) | Low profile electric motor | |
| JPH09322513A (en) | Hybrid type step motor | |
| JP3084220B2 (en) | Hybrid type step motor | |
| WO2004091076A1 (en) | An outer magnetic circuit bias magnetic bias reluctance machine with permanent magnets | |
| US6570274B2 (en) | Electric motor | |
| JP2006074989A (en) | Axial-gap rotary electric machine | |
| JPH11299196A (en) | Small-sized motor | |
| JP3797488B2 (en) | Multi-pole rotating electric machine | |
| JP2000125533A (en) | Motor | |
| JP3905872B2 (en) | Permanent magnet type stepping motor | |
| JP3517546B2 (en) | motor | |
| JP3138628B2 (en) | Driving method of hybrid type step motor | |
| JP3178616B2 (en) | Outer rotor type stepping motor | |
| JPH10213438A (en) | Gimbal mechanism using hybrid-type step motor | |
| JP3138651B2 (en) | Indexing device using hybrid type step motor | |
| JP3138627B2 (en) | Driving method of hybrid type step motor | |
| JP2936131B2 (en) | Small electric motor | |
| JPH1141905A (en) | Linear pulse motor | |
| JP3466059B2 (en) | Hybrid type three-phase step motor | |
| JP3517542B2 (en) | motor | |
| JP3207301B2 (en) | Linear pulse motor |