JP2003324865A - Permanent magnet motor - Google Patents
Permanent magnet motorInfo
- Publication number
- JP2003324865A JP2003324865A JP2002128655A JP2002128655A JP2003324865A JP 2003324865 A JP2003324865 A JP 2003324865A JP 2002128655 A JP2002128655 A JP 2002128655A JP 2002128655 A JP2002128655 A JP 2002128655A JP 2003324865 A JP2003324865 A JP 2003324865A
- Authority
- JP
- Japan
- Prior art keywords
- yoke
- stator
- permanent magnet
- electric motor
- winding
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば空気調和機
や冷蔵庫のファンモータなどに用いられるインナーロー
タ型の永久磁石電動機（ブラシレスＤＣモータ）に関
し、さらに詳しく言えば、トルク変動を小さくする技術
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner rotor type permanent magnet electric motor (brushless DC motor) used, for example, in a fan motor of an air conditioner or a refrigerator, and more specifically to a technique of reducing torque fluctuation. It is a thing.
【０００２】[0002]
【従来の技術】多くの場合、永久磁石電動機は、図１７
に示すように、固定子１を外側とし、その内側に永久磁
石を有する回転子（界磁）２を配置してなる。固定子１
は所定厚さの円筒形のヨーク部１ａを有し、ヨーク部１
ａの内周に中心方向に延びた歯１ｂを所定数（例えば６
スロット）分だけ円周方向に等間隔に形成してなる。2. Description of the Related Art In many cases, a permanent magnet electric motor is used as shown in FIG.
As shown in (1), the stator 1 is placed outside and the rotor (field) 2 having a permanent magnet is placed inside the stator 1. Stator 1
Has a cylindrical yoke portion 1a having a predetermined thickness.
A predetermined number of teeth 1b (for example, 6
The slots are formed at equal intervals in the circumferential direction.
【０００３】また、各歯１ｂの回転子２側端部は、円周
方向に延びた端部を備えている。各歯１ｂには、同歯１
ｂによって形成されるスロットを介して集中巻の巻線３
が施されている。The end of each tooth 1b on the rotor 2 side is provided with an end extending in the circumferential direction. Each tooth 1b has the same tooth 1
concentrated winding 3 through the slot formed by b
Has been applied.
【０００４】回転子２は円柱形のヨークと、このヨーク
表面に設けた複数の永久磁石とを有し、永久磁石の各々
を円周方向に等間隔に配置して界磁を形成してなる。な
お、永久磁石は、隣接する極が異極となるように配置し
ている。また、回転子２のヨークはロータシャフト４に
固着されている。The rotor 2 has a cylindrical yoke and a plurality of permanent magnets provided on the surface of the yoke. The permanent magnets are arranged at equal intervals in the circumferential direction to form a field. . The permanent magnets are arranged so that adjacent poles have different poles. The yoke of the rotor 2 is fixed to the rotor shaft 4.
【０００５】この永久磁石電動機によれば、固定子１の
巻線３の通電を切り替えて回転磁界を発生させると、回
転磁界と回転子２の永久磁石の磁界との相互作用により
回転力となるトルクが発生する。According to this permanent magnet motor, when energization of the winding 3 of the stator 1 is switched to generate a rotating magnetic field, the rotating magnetic field and the magnetic field of the permanent magnet of the rotor 2 generate a rotating force. Torque is generated.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、従来の
永久磁石電動機において、固定子１の電機子鉄心（コ
ア）には回転子２側に歯１ｂが形成されているため、コ
ギングトルクやトルクリップルが大きく、高精度の制御
を困難にものにしているだけなく、振動，騒音の原因に
なっていた。However, in the conventional permanent magnet electric motor, since the teeth 1b are formed on the rotor 2 side of the armature core of the stator 1, cogging torque and torque ripple are not generated. Not only making large and high-precision control difficult, but also causing vibration and noise.
【０００７】すなわち、コギングトルクとは、電機子巻
線に通電しないときのトルク脈動であり、トルクリップ
とは、電機子巻線に通電したときに発生するトルク変動
であり、その巻線の通電切り替えにより、電機子鉄心の
歯と界磁の永久磁石とよって発生する反発吸引（回転に
寄与する力）が、コギングトルク，トルクリップルの発
生要因となっている。That is, the cogging torque is the torque pulsation when the armature winding is not energized, and the torque clip is the torque fluctuation that occurs when the armature winding is energized. The repulsive attraction (force that contributes to rotation) generated by the teeth of the armature core and the permanent magnets of the field due to the switching causes cogging torque and torque ripple.
【０００８】本発明は、上記した課題を解決するために
なされたものであり、その目的は、電機子鉄心の歯およ
び溝を無くして電機子ヨークと界磁磁石との間のエアギ
ャップを均一にすることによって、トルク脈動，トルク
変動を抑えることができるようにしたインナーロータ型
の永久磁石電動機を提供することにある。The present invention has been made in order to solve the above problems, and an object thereof is to eliminate the teeth and grooves of the armature core to make the air gap between the armature yoke and the field magnet uniform. Accordingly, it is an object of the present invention to provide an inner rotor type permanent magnet electric motor capable of suppressing torque pulsation and torque fluctuation.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、電機子巻線を有する固定子を外側とし、
その固定子の内側に界磁の回転子を配置してなる永久磁
石電動機において、上記固定子をヨークのみのコアより
形成するとともに、上記ヨークの内径面に電気絶縁を施
して回転磁界を発生させる巻線を固定して電機子を構成
することにより、ヨークの歯と溝を無くして、ヨークと
界磁磁石との間のエアギャップを均一化したことを特徴
としている。In order to achieve the above object, the present invention provides a stator having an armature winding on the outside,
In a permanent magnet electric motor in which a field rotor is arranged inside the stator, the stator is formed of a core having only a yoke, and the inner diameter surface of the yoke is electrically insulated to generate a rotating magnetic field. The armature is configured by fixing the windings, thereby eliminating the teeth and grooves of the yoke and making the air gap between the yoke and the field magnet uniform.
【００１０】本発明には、次に述べるいくつかの態様が
含まれる。まず、上記固定子のヨークは、電磁鋼板を中
空円板状に打ち抜いて自動積層して円筒形とすることに
より形成できる。次の態様は、上記固定子のヨークが、
同一の扇形状に分割された複数の部分ヨークを含む場合
で、この場合には、上記各部分ヨークを電磁鋼板から相
互に連結した状態で打ち抜いて自動積層し、積層された
上記各部分ヨークを組み立てて円筒形のヨークとするこ
とが好ましい。The present invention includes the following several aspects. First, the yoke of the stator can be formed by punching electromagnetic steel plates into a hollow disk shape and automatically stacking them into a cylindrical shape. In the next aspect, the yoke of the stator is
In the case of including a plurality of partial yokes divided into the same fan shape, in this case, the partial yokes are punched in a state of being mutually connected from the electromagnetic steel plates and automatically laminated, and the laminated partial yokes are It is preferably assembled into a cylindrical yoke.
【００１１】これとは別に、上記各部分ヨークをその一
端を凸形状とし、他端を上記凸形状に嵌合する凹形状と
して電磁鋼板から打ち抜いて自動積層し、積層された上
記各部分ヨークを組み立てて円筒形のヨークとしてもよ
い。いずれにしても、従来の自動プレスやプレス金型な
どが利用でき、余計な設備投資をしないで済む。Separately, each of the partial yokes has a convex shape at one end and a concave shape at the other end to be fitted in the convex shape, and is punched out from electromagnetic steel sheets to be automatically laminated. It may be assembled into a cylindrical yoke. In any case, conventional automatic presses and press dies can be used, and unnecessary capital investment can be avoided.
【００１２】また、上記固定子のヨークは、長尺の鋼帯
をその幅方向に傾斜させるようにプレスしながら螺旋状
に重ねて円筒形にすることもできし、あるいは長尺の鋼
帯を渦巻状に巻き取って円筒形にすることもできる。Further, the yoke of the stator may be formed into a cylindrical shape by spirally stacking a long steel strip while pressing the long steel strip so as to incline in the width direction, or a long steel strip may be formed. It can also be rolled up into a cylindrical shape.
【００１３】さらに、上記固定子のヨークは、強磁性体
の鋼板で円筒形に形成したブラケット（外被）と兼用す
ることも可能である。このように、帯状の電磁鋼板を用
いることにより、打ち抜きのための自動プレスやプレス
金型などを必要とせず、低コスト化が図られる。Further, the yoke of the stator can also be used as a bracket (cover) formed of a ferromagnetic steel plate in a cylindrical shape. As described above, by using the strip-shaped electromagnetic steel sheet, an automatic press for punching, a press die or the like is not required, and the cost can be reduced.
【００１４】上記固定子のヨークの内径面に固定する電
機子巻線は、絶縁層と接着層をコーティングした断面円
形導体のエナメル線を巻いて、その横断面形状を円形に
整形し、この電機子巻線をヨークの内径面に電気絶縁を
施して円周方向に複数個等間隔に固着することが好まし
い。The armature winding fixed to the inner diameter surface of the yoke of the stator is formed by winding an enameled wire having a circular cross-section conductor coated with an insulating layer and an adhesive layer and shaping the cross-sectional shape into a circular shape. It is preferable that a plurality of child windings be electrically insulated from the inner diameter surface of the yoke and fixed in the circumferential direction at equal intervals.
【００１５】また、上記固定子のヨークの内径面に固定
する電機子巻線は、絶縁層と接着層をコーティングした
断面長方形導体のエナメル線とし、その短辺を含む平面
を巻軸と直角にして巻いたコイルを円状に整形し、この
電機子巻線をヨークの内径面に電気絶縁を施して円周方
向に複数個等間隔に固着してもよく、これによれば、現
存するエナメル線を用いて電機子巻線を得ることができ
る。The armature winding fixed to the inner diameter surface of the yoke of the stator is an enameled wire having a rectangular conductor in cross section coated with an insulating layer and an adhesive layer, and the plane including the short side thereof is perpendicular to the winding axis. The wound coil may be shaped into a circular shape, and the armature winding may be electrically insulated from the inner diameter surface of the yoke and fixed at equal intervals in the circumferential direction. The wires can be used to obtain armature windings.
【００１６】これとは別に、上記固定子のヨークの内径
面に固定する電機子巻線は、コイルパターンを形成した
フキシブルプリント基板を単数あるいは複数枚重ねたも
のを円筒径に形成し、この電機子巻線をヨークの内径面
に電気絶縁を施して固着することもできる。これによ
り、電機子巻線のモータ径方向の厚さが薄くなり、電機
子ヨークと界磁磁石との間のエアギャップの均一化が図
れる。Separately from this, the armature winding fixed to the inner diameter surface of the yoke of the stator is formed by stacking a single or a plurality of flexible printed circuit boards each having a coil pattern and having a cylindrical diameter. It is also possible to fix the armature winding by electrically insulating it from the inner diameter surface of the yoke. As a result, the thickness of the armature winding in the radial direction of the motor is reduced, and the air gap between the armature yoke and the field magnet can be made uniform.
【００１７】上記固定子のヨークの内径面に、内巻用の
インシュレータを設けて同インシュレータに集中巻で電
機子巻線を施すとよい。また、上記固定子のヨークの内
径面に、外巻用のインシュレータを設け、そのインシュ
レータに集中巻で電機子巻線を施したうえでヨークの内
周側に固定することもできる。このように、極めて電気
絶縁性に優れたインシュレータを用いて電機子巻線を得
ることにより、磁束漏れなどによる効率低下が効果的に
抑えられる。An inner winding insulator may be provided on the inner diameter surface of the yoke of the stator, and the armature winding may be wound around the insulator by concentrated winding. It is also possible to provide an insulator for outer winding on the inner diameter surface of the yoke of the stator, and to perform armature winding on the insulator by concentrated winding and then fix the insulator on the inner peripheral side of the yoke. As described above, by obtaining the armature winding by using the insulator having an extremely excellent electric insulating property, it is possible to effectively suppress the decrease in efficiency due to magnetic flux leakage.
【００１８】また、上記回転子は、その回転軸に固定す
るヨークを積層鋼板で柱形に構成し、この柱形のヨーク
外径面に複数の永久磁石を固着し、それら永久磁石の隣
接同士を異極とし、その界磁の隣接する異極端同士の最
短距離が界磁磁極外径と固定子のヨーク内径との差の距
離の２倍の値以上になるようにすることが好ましい。こ
れにより、上述した固定子と同様に、回転子の製造にお
いて従来の自動プレスやプレス金型などが利用でき、低
コスト製造設備で済ませられる。Further, in the rotor, the yoke fixed to the rotating shaft is formed of a laminated steel plate into a pillar shape, and a plurality of permanent magnets are fixed to the outer diameter surface of the pillar-shaped yoke. Is a different pole, and the shortest distance between adjacent extremes of the field is preferably at least twice the difference between the outer diameter of the field pole and the inner diameter of the yoke of the stator. As a result, similar to the above-described stator, the conventional automatic press or press die can be used in the production of the rotor, and the production cost can be reduced.
【００１９】これとは別に、上記回転子は、その回転軸
に固定するヨークを塊状強磁性体で柱形に構成し、この
柱形のヨーク外径面に複数の永久磁石を固着し、それら
永久磁石の隣接同士を異極とし、その界磁の隣接する異
極端同士の最短距離が界磁磁極外径と固定子のヨーク内
径との差の距離の２倍の値以上になるようにすることが
好ましく、これによっても回転子を低コストにて製造で
きる。Separately, in the rotor, the yoke fixed to the rotating shaft is made of a massive ferromagnetic material in a pillar shape, and a plurality of permanent magnets are fixed to the outer diameter surface of the pillar-shaped yoke. Adjacent permanent magnets are made to have different poles, and the shortest distance between adjacent extremes of the field magnet is at least twice the value of the difference between the outer diameter of the field magnetic pole and the inner diameter of the yoke of the stator. It is preferable that the rotor can be manufactured at low cost.
【００２０】また、別の態様として、上記回転子は、プ
ラスチックマグネットを用いて複数の磁極を凸形状に整
形したものを回転軸に固着してなり、それら磁極の隣接
同士を異極とし、その界磁の隣接する異極端同士の最短
距離が界磁磁極外径と固定子のヨーク内径との差の距離
と同等以上になるようにすることもでき、これによれ
ば、磁極を構成する永久磁石の形状が容易にでき、回転
子の低コスト化が可能である。As another aspect, the rotor is formed by fixing a plurality of magnetic poles formed by using a plastic magnet into a convex shape and fixed to the rotating shaft, and the magnetic poles adjacent to each other have different polarities. It is also possible to make the shortest distance between adjacent extremes of the field equal to or greater than the distance between the outer diameter of the magnetic field pole and the inner diameter of the yoke of the stator. The magnet can be shaped easily and the cost of the rotor can be reduced.
【００２１】[0021]
【発明の実施の形態】次に、図１ないし図１６を参照し
て、本発明の実施形態について説明する。図１に示すよ
うに、本発明の永久磁石電動機は、円筒形のヨーク部１
０のみのコア（電機子鉄心）に、回転磁界を発生させる
ためにヨーク部１０の内径面に巻線（電機子巻線）１１
を固定し、かつ、電機子巻線１１を円周方向に等間隔に
複数個設けて固定子１２としてなる。なお、それら電機
子巻線１１は電気絶縁を介してヨーク部１０に固定す
る。BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the permanent magnet motor of the present invention has a cylindrical yoke portion 1.
A winding (armature winding) 11 is formed on the inner diameter surface of the yoke portion 10 in order to generate a rotating magnetic field in a core (armature core) of 0 only.
And a plurality of armature windings 11 are provided at equal intervals in the circumferential direction to form a stator 12. The armature windings 11 are fixed to the yoke portion 10 via electrical insulation.
【００２２】固定子１２の内側には、界磁を形成する回
転子１３が配置され、この回転子１３は、そのシャフト
１４に固着したヨーク部１５および同ヨーク部１５に複
数の永久磁石１６を固定してなる。A rotor 13 for forming a field is arranged inside the stator 12, and the rotor 13 has a yoke portion 15 fixed to a shaft 14 thereof and a plurality of permanent magnets 16 in the yoke portion 15. It will be fixed.
【００２３】このように、固定子１２には歯および溝
（スロット）がなく、固定子１２の電機子鉄心と界磁の
永久磁石１６との間のエアギャップが均一になることか
ら、固定子１２のヨーク部１０と回転子１３の永久磁石
１６との間に作用する磁力はどの角度でも同じとなる。As described above, since the stator 12 has no teeth and grooves (slots) and the air gap between the armature core of the stator 12 and the permanent magnet 16 of the field is uniform, the stator 12 is The magnetic force acting between the yoke portion 10 of 12 and the permanent magnet 16 of the rotor 13 is the same at any angle.
【００２４】したがって、電機子巻線１１に電流を流し
たときに、電機子巻線１１と永久磁石１６の磁束との間
に発生するトルクについて、その空間的変化率は電機子
鉄心の歯と永久磁石の磁束との間に発生する場合より小
さく、変動の少ないトルクが発生することになる。Therefore, with respect to the torque generated between the armature winding 11 and the magnetic flux of the permanent magnet 16 when a current is applied to the armature winding 11, the spatial rate of change is the same as the tooth of the armature core. Torque that is smaller and less fluctuating than that generated with the magnetic flux of the permanent magnet is generated.
【００２５】また、電機子巻線１１は、固定子１２のヨ
ーク部１０の内径面に固定するが、最大限に広い面積に
巻いて固着するとよい。これにより、固定子１２のヨー
ク部１０と回転子１３の永久磁石１６との間のエアギャ
ップが極力短くなるため、磁束が増え、歯の無い分を補
填して効率低下を防ぐことができる。Further, the armature winding 11 is fixed to the inner diameter surface of the yoke portion 10 of the stator 12, but it may be fixed by winding the armature winding 11 in a maximum area. As a result, the air gap between the yoke portion 10 of the stator 12 and the permanent magnet 16 of the rotor 13 is shortened as much as possible, so that the magnetic flux is increased, and it is possible to compensate for the absence of teeth and prevent a decrease in efficiency.
【００２６】固定子の具体的例について、図２ないし図
８を参照して説明する。なお図中、図１と同一部分には
同一符号を付して重複説明を省略する。図２に示す実施
例の場合、固定子２０のヨーク部２１は、電磁鋼板をプ
レスによって中空円板状に打ち抜いて積層し、金型内で
自動積層する。その自動積層に際し、かしめ部２２を形
成し、またそのかしめ部２２を複数カ所に設けるとよ
い。これにより、従来の自動プレス装置を用いて固定子
２０を製造することができる。A specific example of the stator will be described with reference to FIGS. In the figure, the same parts as those in FIG. In the case of the embodiment shown in FIG. 2, the yoke portion 21 of the stator 20 is formed by punching electromagnetic steel plates into a hollow disc shape by a press and stacking them, and automatically stacking them in a mold. At the time of the automatic lamination, it is preferable to form the crimped portion 22 and to provide the crimped portion 22 at a plurality of places. As a result, the stator 20 can be manufactured using the conventional automatic press machine.
【００２７】図３に示す実施例の場合、固定子３０のヨ
ーク部３１は複数（例えば６個）の部分ヨーク３１ａか
ら構成し、つまりヨーク部３１は分割可能とし、各部分
ヨーク３１ａは同一形状としてなる。この場合、前実施
例と同様に、電磁鋼板を打ち抜いて部分ヨーク３１ａの
各々を独立として自動積層し（図４参照）、これらを円
形状に組み立てて円筒形とする。In the case of the embodiment shown in FIG. 3, the yoke portion 31 of the stator 30 is composed of a plurality of (for example, six) partial yokes 31a, that is, the yoke portion 31 is divisible and each partial yoke 31a has the same shape. As In this case, similar to the previous embodiment, the electromagnetic steel plates are punched out to automatically stack the partial yokes 31a independently (see FIG. 4), and these are assembled into a circular shape to form a cylindrical shape.
【００２８】その場合、部分ヨーク３１ａは扇形状と
し、その一端は凸部（例えばくの字形）とし、他端はそ
の凸部に嵌合する凹部（同じくの字形）とすることが好
ましい。なお、電磁鋼板を打ち抜いて自動積層によって
各部分ヨーク３１ａを得る際には、かしめ部３２を設け
るとよい。In this case, it is preferable that the partial yoke 31a is fan-shaped, one end of which is a convex portion (for example, a dogleg shape), and the other end of which is a concave portion (a similar letter shape) that fits into the convex portion. When the electromagnetic steel plates are punched out and the partial yokes 31a are obtained by automatic lamination, the caulking portion 32 may be provided.
【００２９】また、図５に示すように、各部分ヨーク３
１ａを打ち抜く際には、電磁鋼板を節約するために、各
部分ヨーク３１ａを連結させながら分割して打ち抜くこ
とが好ましい。なお、必ずしも各部分ヨーク３１ａをあ
らかじめヨーク部３１の形状に合わせた形に打ち抜く必
要もない。すなわち、打ち抜いた後に折り曲げて円形状
に組み立てるような形に各部分ヨーク３１ａを打ち抜け
ば、電磁鋼板の利用効率をより上げることができる。As shown in FIG. 5, each partial yoke 3
When punching out 1a, in order to save the electromagnetic steel plate, it is preferable that the partial yokes 31a are divided and punched while being connected. Note that it is not always necessary to punch each partial yoke 31a into a shape that matches the shape of the yoke portion 31 in advance. That is, if the partial yokes 31a are punched in a shape such that they are punched and then bent and assembled into a circular shape, the utilization efficiency of the electromagnetic steel sheet can be further increased.
【００３０】図６に示す実施例の場合、固定子４０のヨ
ーク部４１はリボン形状の電磁鋼帯（長尺）を螺旋状に
重ね巻いてなる（シャフトの軸方向に巻き取ってな
る）。この場合、長尺の鋼帯を幅方向にアンバランスに
圧下させながら複数段に巻き重ねることにより、その鋼
帯は螺旋状に重ね巻き取られ、つまりヨーク部４１が容
易に製造される。なお、その鋼帯はステータヨークのシ
ャフト方向長さを考慮して必要な厚さのものを用いれば
よい。In the case of the embodiment shown in FIG. 6, the yoke portion 41 of the stator 40 is formed by spirally winding a ribbon-shaped electromagnetic steel strip (long) (winding in the axial direction of the shaft). In this case, a long steel strip is rolled in a plurality of stages while being unbalancedly rolled down in the width direction, so that the steel strip is spirally wound up, that is, the yoke portion 41 is easily manufactured. It should be noted that the steel strip may have a required thickness in consideration of the length of the stator yoke in the shaft direction.
【００３１】図７に示す実施例の場合、固定子５０のヨ
ーク部５１はリボン形状の長尺の鋼帯を渦巻状に重ね巻
いてなる。この場合、その鋼帯は必要な幅のもの（ヨー
クのシャフト方向長さ分のもの）を用いればよい。これ
により、ヨーク部５１は前実施例と比較して最も容易に
製造することができる。In the case of the embodiment shown in FIG. 7, the yoke portion 51 of the stator 50 is formed by spirally winding a long ribbon-shaped steel strip. In this case, the steel strip may have a required width (corresponding to the length of the yoke in the shaft direction). As a result, the yoke portion 51 can be manufactured most easily as compared with the previous embodiment.
【００３２】図８に示す実施例の場合、固定子６０のヨ
ーク部６１は強磁性体の鋼板を少なくとも部分的に円筒
形に形成したブラケット（当該電動機の外被）を用い、
ヨーク部６１はブラケットと兼用してなる。この場合、
そのブラケットは必要な磁束を通す程度に厚くするとよ
い。これにより、ヨーク部６１は前実施例と比較して最
も安価に得られる。In the case of the embodiment shown in FIG. 8, the yoke portion 61 of the stator 60 uses a bracket (a jacket of the electric motor) in which a ferromagnetic steel plate is at least partially formed in a cylindrical shape.
The yoke portion 61 also serves as a bracket. in this case,
The bracket should be thick enough to pass the required magnetic flux. As a result, the yoke portion 61 can be obtained at the lowest cost as compared with the previous embodiment.
【００３３】ところで、上述した各実施例における固定
子１２，２０，３０，４０，５０，６０の内径側に固着
する電機子巻線１１としては、図９ないし図１１に示す
巻線を用いるとよい。図９の例において、電機子巻線は
断面円形の導体を重ね巻いたコイル７０を作製し、これ
を例えばほぼ円形状に整形してなる。この場合、その導
体は絶縁層と接着層をコーティングしたエナメル線であ
る。By the way, if the windings shown in FIGS. 9 to 11 are used as the armature windings 11 fixed to the inner diameter side of the stators 12, 20, 30, 40, 50, 60 in the above-mentioned respective embodiments. Good. In the example of FIG. 9, the armature winding is formed by forming a coil 70 in which conductors having a circular cross section are superposed and shaped into a substantially circular shape, for example. In this case, the conductor is an enameled wire coated with an insulating layer and an adhesive layer.
【００３４】図１０の例において、電機子巻線はコイル
７０と同様に断面長方形の導体を用いてコイル７１を作
製、整形してなる。この場合、導体は絶縁層と接着層を
コーティングしたエナメル線であり、コイル７１はエナ
メル線の短辺を含む平面を巻軸と直角にして作製し、エ
ナメル線の幅方向をシャフトの軸方向とし、かつ、その
厚さ方向巻きてほぼ円形状に整形して得る。なお、コイ
ル７０，７１は固定子のヨーク部の内径側に絶縁物を介
して固着するとともに、必要数だけ等間隔に配置する。In the example of FIG. 10, the armature winding is made by forming and shaping the coil 71 using a conductor having a rectangular cross section, like the coil 70. In this case, the conductor is an enamel wire coated with an insulating layer and an adhesive layer, and the coil 71 is manufactured with the plane including the short side of the enamel wire being perpendicular to the winding axis, and the width direction of the enamel wire is the axial direction of the shaft. Also, it is obtained by winding it in the thickness direction and shaping it into a substantially circular shape. The coils 70 and 71 are fixed to the inner diameter side of the yoke portion of the stator via an insulator, and are arranged at equal intervals by the required number.
【００３５】図１１および図１２の例において、電機子
巻線はコイルパターンを形成したフレキシブルプリント
基板（フレキシブル基板）７２を用いる。この場合、フ
レキシブル基板７２は単数のまま用い、あるいは複数枚
重ねて固定子の内径側に固着するが（図１２参照）、そ
の固定子の内径面に絶縁を施した後に、そのフレキシブ
ル基板７２をその内径に合った円筒形に丸めて固着す
る。11 and 12, the armature winding uses a flexible printed board (flexible board) 72 having a coil pattern. In this case, a single flexible substrate 72 is used as it is, or a plurality of flexible substrates 72 are stacked and fixed to the inner diameter side of the stator (see FIG. 12). The product is rolled into a cylindrical shape that fits the inside diameter and fixed.
【００３６】図１２に示すように、例えば２枚のフレキ
シブル基板７２を用いる場合、それらフレキシブル基板
７２を重ねて円筒形に丸め、また、端子ａと端子ｄとを
接続し、端子ｂと端子ｃとを接続して固定子の内径側に
固着する。As shown in FIG. 12, for example, when two flexible boards 72 are used, the flexible boards 72 are overlapped and rolled into a cylindrical shape, and terminals a and d are connected to each other, and terminals b and c are connected. And are fixed to the inner diameter side of the stator.
【００３７】また、上述した例においては、電機子巻線
をそのまま固定子の内径側に直接的に固着してなるが、
図１３あるいは図１４に示すように、インシュレータを
用いるようにしてもよい。まず、図１３の例において、
固定子８０はその内径側に集中巻（直巻）型のインシュ
レータ（内巻用）８１を装着し、このインシュレータ８
１に集中巻で巻線を施してなる。In the above example, the armature winding is directly fixed to the inner diameter side of the stator as it is,
An insulator may be used as shown in FIG. 13 or FIG. First, in the example of FIG.
The stator 80 is provided with a concentrated winding (series winding) type insulator (for inner winding) 81 on the inner diameter side thereof.
It is made by winding concentrated winding on 1.
【００３８】なお、インシュレータ８１は内巻の集中巻
に適したものであり、固定子８０の内径面に当節する円
筒形部と、この円筒部の内周側に設けた断面Ｔ字部とか
らなり、この断面Ｔ字部を円周方向に等間隔に複数個設
けた形である。The insulator 81 is suitable for concentrated inner winding, and has a cylindrical portion that contacts the inner diameter surface of the stator 80 and a T-shaped cross section provided on the inner peripheral side of the cylindrical portion. And a plurality of T-shaped cross sections are provided at equal intervals in the circumferential direction.
【００３９】図１４の例において、固定子９０はその内
径側に集中巻の外巻に適した外巻用のインシュレータ９
１装着してなるが、そのインシュレータ９１に集中巻で
巻線を施した後に、その内径側に納めて固定する。In the example of FIG. 14, the stator 90 has an outer diameter insulator 9 suitable for concentrated outer winding on its inner diameter side.
Although one is mounted, after the insulator 91 is wound by concentrated winding, it is housed and fixed on the inner diameter side.
【００４０】インシュレータ９１はインシュレータ８１
と逆形状であり、固定子９０の内径面に断面Ｔ字の先部
を当節させ、この断面Ｔ字部を同固定子９０の内径より
小さい径の円筒部に複数個設けた形である。なお、イン
シュレータ８１，９１は当然絶縁物である。また、固定
子８０，９０は、上述した例の固定子１２，２０，３
０，４０，５０，６０のいずれであってもよい。The insulator 91 is an insulator 81.
This is a shape opposite to that of the above, and the tip portion of the T-shaped cross section is abutted on the inner diameter surface of the stator 90, and a plurality of T-shaped cross-section portions are provided in the cylindrical portion having a diameter smaller than the inner diameter of the stator 90. . The insulators 81 and 91 are naturally insulators. The stators 80, 90 are the stators 12, 20, 3 of the above-mentioned example.
It may be 0, 40, 50 or 60.
【００４１】一方、上述した固定子の内側に配置する回
転子は、図１５あるいは図１６に示す構造にするとよ
い。図中、図１と同一部分には同一符号を付して重複説
明を省略する。まず、図１５の例において、回転子１０
０は電磁鋼板を打ち抜いて自動積層した積層鋼板をヨー
ク部１０１とし、このヨーク部１０１の固定子側に永久
磁石１１０を複数個固定してなる。On the other hand, the rotor arranged inside the above-mentioned stator may have the structure shown in FIG. 15 or 16. In the figure, the same parts as those in FIG. First, in the example of FIG.
Reference numeral 0 indicates a yoke portion 101 made of laminated steel sheets obtained by punching out electromagnetic steel sheets and automatically laminating them, and a plurality of permanent magnets 110 are fixed to the stator side of the yoke portion 101.
【００４２】例えば、電磁鋼板を正方形に打ち抜くとと
もに、同時にシャフト１４に固着するための孔を打ち抜
き、また、かしめ部１０２を形成しながら積層する。永
久磁石１１０は、ヨーク部１０１の各辺に固定し、かつ
隣接する永久磁石１１０を異極としてなる。なお、上記
ヨーク部１０１に代えて、正角柱の塊状強磁性体を用い
るようにしてもよい。For example, the electromagnetic steel plates are punched into a square shape, and at the same time, holes for fixing to the shaft 14 are punched out, and the caulked portion 102 is formed while being laminated. The permanent magnet 110 is fixed to each side of the yoke portion 101, and the adjacent permanent magnets 110 have different poles. It should be noted that instead of the above-mentioned yoke portion 101, a regular columnar massive ferromagnetic material may be used.
【００４３】次に、図１６の例において、回転子１２０
はプラスチックマグネットを用い複数の磁極を凸形状に
形成し、つまり永久磁石およびヨークを兼用してなり、
その中心には回転子１２０をシャフト１４に固定するた
めの孔を設けてなる。また、それら磁極の隣接同士は異
極としてなる。Next, in the example of FIG. 16, the rotor 120
Uses a plastic magnet to form multiple magnetic poles in a convex shape, that is, it also serves as a permanent magnet and a yoke.
A hole for fixing the rotor 120 to the shaft 14 is provided at the center thereof. Further, the adjacent magnetic poles have different polarities.
【００４４】また、上述した永久磁石電動機において、
回転子１３，１００，１２０の界磁（永久磁石）の隣接
する異極端同士の最短距離が界磁磁極外径と電機子巻線
ヨークの内径との差（距離）の２倍の値以上になるよう
にする。これにより、回転磁界と永久磁石との相互作用
によるトクルが最適に発生する。In the above permanent magnet motor,
The shortest distance between adjacent extremes of the field magnets (permanent magnets) of the rotors 13, 100, 120 is more than twice the difference (distance) between the outer diameter of the field pole and the inner diameter of the armature winding yoke. To be As a result, the tokule is optimally generated due to the interaction between the rotating magnetic field and the permanent magnet.
【００４５】なお、上述した例では、回転子のヨーク部
１５を角柱形としているが、円柱形とした積層鋼板を用
い、またその積層鋼板の円柱形に永久磁石を埋め込んだ
回転子に適用してもよい。また、上述した固定子の電機
子巻線数が６個であり、回転子の界磁が４つの永久磁石
からなっているが、他の数の電機子巻線を用い、また他
の数の永久磁石を用いてもよい。In the above example, the yoke portion 15 of the rotor has a prismatic shape, but it is applied to a rotor in which a cylindrical laminated steel plate is used and a permanent magnet is embedded in the cylindrical steel plate. May be. Further, although the number of armature windings of the above-mentioned stator is 6 and the field of the rotor is composed of four permanent magnets, another number of armature windings is used, and another number of armature windings is used. You may use a permanent magnet.
【００４６】[0046]
【発明の効果】以上説明したように、本発明によれば、
ヨークのみのコア（電機子鉄心）と電機子巻線とからな
る固定子を備え、少なくともヨークの内径面に電気絶縁
を施して巻線を固定して電機子を形成していることか
ら、固定子のヨークに歯および溝が無く、電機子ヨーク
と界磁磁石との間のエアギャップが均一となるため、電
機子ヨークと回転子の永久磁石との間に作用する磁力が
どの回転角度でもほぼ同じとなり、トルク脈動，トルク
変動が抑えられ、低振動，低騒音が図れるという効果が
奏される。As described above, according to the present invention,
Since the armature is formed by providing a stator consisting of a yoke-only core (armature core) and an armature winding, and fixing the winding by electrically insulating at least the inner diameter surface of the yoke. Since there are no teeth or grooves on the yoke of the armature and the air gap between the armature yoke and the field magnet is uniform, the magnetic force acting between the armature yoke and the permanent magnet of the rotor is not affected by any rotation angle. The effects are almost the same, torque pulsation and torque fluctuation are suppressed, and low vibration and low noise are achieved.
【図１】本発明による永久磁石電動機の実施形態を示す
概略的平面図。FIG. 1 is a schematic plan view showing an embodiment of a permanent magnet electric motor according to the present invention.
【図２】図１に示す永久磁石電動機の固定子を説明する
概略的平面図および側断面図。2 is a schematic plan view and a side sectional view illustrating a stator of the permanent magnet electric motor shown in FIG.
【図３】図１に示す永久磁石電動機の固定子を説明する
概略的平面図。FIG. 3 is a schematic plan view illustrating a stator of the permanent magnet motor shown in FIG.
【図４】図３に示す固定子のヨークを説明する概略的部
分拡大図。4 is a schematic partial enlarged view illustrating a yoke of the stator shown in FIG.
【図５】図４に示す固定子のヨークの変形例を説明する
概略的部分拡大図。5 is a schematic partial enlarged view for explaining a modified example of the yoke of the stator shown in FIG.
【図６】図１に示す永久磁石電動機の固定子を説明する
概略的平面図および側面図。6A and 6B are a schematic plan view and a side view illustrating a stator of the permanent magnet motor shown in FIG.
【図７】図１に示す永久磁石電動機の固定子を説明する
概略的平面図。FIG. 7 is a schematic plan view illustrating a stator of the permanent magnet motor shown in FIG.
【図８】図１に示す永久磁石電動機の固定子を説明する
概略的平面図。FIG. 8 is a schematic plan view illustrating a stator of the permanent magnet motor shown in FIG.
【図９】図１に示す永久磁石電動機の電機子巻線を説明
する概略的平面図。9 is a schematic plan view illustrating an armature winding of the permanent magnet motor shown in FIG.
【図１０】図１に示す永久磁石電動機の電機子巻線を説
明する概略的平面図。10 is a schematic plan view illustrating an armature winding of the permanent magnet motor shown in FIG.
【図１１】本発明の固定子の電機子巻線を説明するため
の概略的平面図。FIG. 11 is a schematic plan view for explaining an armature winding of the stator of the present invention.
【図１２】図１１に示す電機子巻線を用いた固定子を説
明する概略的平面図。FIG. 12 is a schematic plan view illustrating a stator using the armature winding shown in FIG.
【図１３】図１に示す永久磁石電動機の固定子を説明す
る概略的平面図。13 is a schematic plan view illustrating a stator of the permanent magnet electric motor shown in FIG.
【図１４】図１に示す永久磁石電動機の固定子を説明す
るための概略的平面図。FIG. 14 is a schematic plan view for explaining a stator of the permanent magnet motor shown in FIG.
【図１５】図１に示す永久磁石電動機の回転子を説明す
る概略的平面図および側断面図。15 is a schematic plan view and a side sectional view illustrating a rotor of the permanent magnet electric motor shown in FIG.
【図１６】図１に示す永久磁石電動機の回転子を説明す
る概略的平面図。16 is a schematic plan view illustrating a rotor of the permanent magnet motor shown in FIG.
【図１７】従来の永久磁石電動機を説明するための概略
的構成図。FIG. 17 is a schematic configuration diagram for explaining a conventional permanent magnet electric motor.
１０，２１，３１，４１，５１，６１ 固定子のヨーク
部
１１ 電機子巻線
１２，２０，３０，４０，５０，６０，７０，８０，９
０ 固定子
１３，１００ 回転子（界磁）
１４ シャフト
１５，１０１ 回転子のヨーク部
１６，１１０ 永久磁石電動機
２２，３２，１０２ かしめ部
３１ａ 部分ヨーク部
７０，７１ 電機子巻線
８１ 内巻用インシュレータ
９１ 外巻用インシュレータ
１２０ 回転子（永久磁石およびヨーク兼用）10, 21, 31, 41, 51, 61 Stator yoke part 11 Armature winding 12, 20, 30, 40, 50, 60, 70, 80, 9
0 stator 13,100 rotor (field) 14 shaft 15,101 rotor yoke part 16,110 permanent magnet motor 22,32,102 caulking part 31a partial yoke part 70,71 armature winding 81 for inner winding Insulator 91 Outer winding insulator 120 Rotor (also serves as permanent magnet and yoke)
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｈ０２Ｋ 3/47 Ｈ０２Ｋ 3/47 ５Ｈ６２２ 15/04 15/04 Ｃ 21/14 21/14 Ｍ (72)発明者 藤岡 琢志 神奈川県川崎市高津区末長1116番地 株式 会社富士通ゼネラル内 (72)発明者 田邉 洋一 神奈川県川崎市高津区末長1116番地 株式 会社富士通ゼネラル内 (72)発明者 菊地 祐介 神奈川県川崎市高津区末長1116番地 株式 会社富士通ゼネラル内 Ｆターム(参考） 5H002 AA04 AA09 AB01 AB04 AC04 5H603 AA01 AA03 AA09 BB01 BB09 BB12 CA01 CA05 CB01 CB16 CB26 CC02 CD01 CD04 CD13 CD21 CE01 EE09 EE12 FA16 5H604 AA08 BB01 BB10 BB14 BB17 CC01 CC05 CC12 DA14 DB01 DB18 PB03 5H615 AA01 BB01 BB07 BB14 PP01 PP06 PP11 PP17 QQ02 QQ08 QQ19 QQ22 QQ27 RR07 SS03 SS05 SS11 SS18 SS19 TT26 5H621 AA02 AA04 BB07 GA01 GA11 GB01 GB08 HH01 JK01 5H622 AA02 CA02 CA05 CA10 CA13 CB01 PP01 PP19 Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) H02K 3/47 H02K 3/47 5H622 15/04 15/04 C 21/14 21/14 M (72) Inventor Taku Fujioka Shi, 1116 Suenaga, Takatsu-ku, Kawasaki City, Kanagawa Prefecture In general, Fujitsu General Co., Ltd. (72) Inventor, Yoichi Tanabe, 1116 Suenaga, Takatsu-ku, Kawasaki City, Kanagawa Prefecture Inventor, Yusuke Kikuchi, Yusuke Kikuchi, Kanagawa Prefecture Address 1116 F-term in Fujitsu General Co., Ltd. (reference) 5H002 AA04 AA09 AB01 AB04 AC04 5H603 AA01 AA03 AA09 BB01 BB09 BB12 CA01 CA05 CB01 CB16 CB26 CC02 CD01 CD04 CD13 CD21 CE01 EE09 EE12 FA16 5H604 ABB01 CC14 BB01 CC14 BB01 DB18 PB03 5H615 AA01 BB01 BB07 BB14 PP01 PP06 PP11 PP17 QQ02 QQ08 QQ19 QQ22 QQ27 RR07 SS03 SS05 SS11 SS18 SS19 TT26 5H621 AA02 AA04 BB07 GA01 GA11 GB01 GB08 HH01 JK01 5H622 AA02 CA19 CA01 CA01 CA01 CA02 CA05 CA05 CA05 CA05 CA05 CA01 CA01 CA02 CA01 CA01 CA01 CA01 CA01 CA01 CA02 CA05 CA01 CA01 CA01 CA01
Claims (15)
その固定子の内側に界磁の回転子を配置してなる永久磁
石電動機において、上記固定子をヨークのみのコアより
形成するとともに、上記ヨークの内径面に電気絶縁を施
して回転磁界を発生させる巻線を固定して電機子を構成
するようにしたことを特徴とする永久磁石電動機。1. A stator having an armature winding is placed outside,
In a permanent magnet electric motor in which a field rotor is arranged inside the stator, the stator is formed of a core having only a yoke, and an inner surface of the yoke is electrically insulated to generate a rotating magnetic field. A permanent magnet electric motor characterized in that windings are fixed to form an armature.
円板状に打ち抜いて自動積層して円筒形としてなる請求
項１に記載の永久磁石電動機。2. The permanent magnet electric motor according to claim 1, wherein the yoke of the stator is formed into a cylindrical shape by punching electromagnetic steel plates into a hollow disk shape and automatically laminating them.
分割された複数の部分ヨークを含み、上記各部分ヨーク
を電磁鋼板から相互に連結した状態で打ち抜いて自動積
層し、積層された上記各部分ヨークを組み立てて円筒形
のヨークとしてなる請求項１に記載の永久磁石電動機。3. The stator yoke includes a plurality of partial yokes that are divided into the same fan shape, and the partial yokes are punched in an interconnected state from electromagnetic steel sheets and automatically laminated to form a laminated structure. The permanent magnet electric motor according to claim 1, wherein the partial yokes are assembled to form a cylindrical yoke.
分割された複数の部分ヨークを含み、上記各部分ヨーク
をその一端を凸形状とし、他端を上記凸形状に嵌合する
凹形状として電磁鋼板から打ち抜いて自動積層し、積層
された上記各部分ヨークを組み立てて円筒形のヨークと
してなる請求項１に記載の永久磁石電動機。4. The yoke of the stator includes a plurality of partial yokes divided into the same fan shape, each partial yoke having a convex shape at one end and a concave shape fitting the other end at the convex shape. 2. The permanent magnet electric motor according to claim 1, wherein the permanent magnet electric motor is punched out from an electromagnetic steel sheet as a shape and is automatically laminated, and the laminated partial yokes are assembled into a cylindrical yoke.
の幅方向に傾斜させるようにプレスしながら螺旋状に重
ねて円筒形としてなる請求項１に記載の永久磁石電動
機。5. The permanent magnet electric motor according to claim 1, wherein the yoke of the stator is formed into a cylindrical shape by spirally stacking a long steel strip while pressing it so as to incline it in the width direction.
巻状に巻き取って円筒形としてなる請求項１に記載の永
久磁石電動機。6. The permanent magnet electric motor according to claim 1, wherein the yoke of the stator has a cylindrical shape by winding a long steel strip in a spiral shape.
で円筒形に形成したブラケット（外被）と兼用するよう
にした請求項１に記載の永久磁石電動機。7. The permanent magnet electric motor according to claim 1, wherein the yoke of the stator is also used as a bracket (outer jacket) formed of a ferromagnetic steel plate in a cylindrical shape.
電機子巻線は、絶縁層と接着層をコーティングした断面
円形導体のエナメル線を巻いて、その横断面形状を円形
に整形してなり、その電機子巻線を上記ヨークの内径面
に電気絶縁を施して円周方向に複数個等間隔に固着して
なる請求項１ないし７のいずれか１項に記載の永久磁石
電動機。8. The armature winding fixed to the inner diameter surface of the yoke of the stator is formed by winding an enameled wire having a circular cross-section conductor coated with an insulating layer and an adhesive layer and shaping the cross-sectional shape into a circular shape. The permanent magnet electric motor according to any one of claims 1 to 7, wherein the armature winding is electrically insulated from the inner diameter surface of the yoke and is fixed at equal intervals in the circumferential direction.
電機子巻線は、絶縁層と接着層をコーティングした断面
長方形導体のエナメル線で、その短辺を含む平面を巻軸
と直角にして巻いたコイルを円状に整形してなり、その
電機子巻線を上記ヨークの内径面に電気絶縁を施して円
周方向に複数個等間隔に固着してなる請求項１ないし７
のいずれか１項に記載の永久磁石電動機。9. The armature winding fixed to the inner diameter surface of the yoke of the stator is an enameled wire having a rectangular cross section coated with an insulating layer and an adhesive layer, and the plane including the short side is perpendicular to the winding axis. 8. The wound coil is shaped into a circle, and the armature winding is electrically insulated from the inner diameter surface of the yoke and fixed in the circumferential direction at equal intervals.
The permanent magnet electric motor according to any one of 1.
る電機子巻線は、コイルパターンを形成したフキシブル
プリント基板を単数あるいは複数枚重ねたものを円筒形
に形成してなり、その電機子巻線を上記ヨークの内径面
に電気絶縁を施して固着してなる請求項１ないし７のい
ずれか１項に記載の永久磁石電動機。10. The armature winding fixed to the inner diameter surface of the yoke of the stator is formed by stacking a single or a plurality of flexible printed boards having a coil pattern into a cylindrical shape. The permanent magnet electric motor according to any one of claims 1 to 7, wherein the sub winding is fixed to the inner diameter surface of the yoke by electrical insulation.
巻用のインシュレータを設けて同インシュレータに集中
巻で電機子巻線を施してなる請求項１ないし７のいずれ
か１項に記載の永久磁石電動機。11. The stator according to claim 1, wherein an inner winding insulator is provided on the inner diameter surface of the yoke of the stator, and the armature winding is wound around the insulator by concentrated winding. Permanent magnet electric motor.
巻用のインシュレータを設け、そのインシュレータに集
中巻で電機子巻線を施して上記ヨークの内周側に固定し
てなる請求項１ないし７のいずれか１項に記載の永久磁
石電動機。12. An insulator for outer winding is provided on an inner diameter surface of a yoke of the stator, and the insulator is fixed to the inner peripheral side of the yoke by applying armature winding by concentrated winding. The permanent magnet electric motor according to any one of 1 to 7.
ヨークを積層鋼板で柱形に構成し、上記ヨーク外径面に
複数の永久磁石を固着してなり、それら永久磁石の隣接
同士を異極とし、その界磁の隣接する異極端同士の最短
距離が界磁磁極外径と固定子のヨーク内径との差の距離
と同等以上になるようにした請求項１ないし１２のいず
れか１項に記載の永久磁石電動機。13. The rotor has a yoke fixed to its rotation shaft, which is formed of a laminated steel plate in a columnar shape, and a plurality of permanent magnets fixed to the outer surface of the yoke. 13. Different poles, wherein the shortest distance between adjacent extremes of the field is equal to or greater than the difference between the outer diameter of the field pole and the inner diameter of the yoke of the stator. A permanent magnet electric motor according to item.
ヨークを塊状強磁性体で柱形に構成し、上記ヨーク外径
面に複数の永久磁石を固着してなり、それら永久磁石の
隣接同士を異極とし、その界磁の隣接する異極端同士の
最短距離が界磁磁極外径と固定子のヨーク内径との差の
距離の２倍の値以上になるようにした請求項１ないし１
２のいずれか１項に記載の永久磁石電動機。14. The rotor has a yoke fixed to its rotation shaft, which is formed of a massive ferromagnetic material into a columnar shape, and a plurality of permanent magnets fixed to the outer diameter surface of the yoke. The permanent magnets are adjacent to each other. The two poles are different poles, and the shortest distance between adjacent different extremes of the field is equal to or more than twice the difference between the outer diameter of the field pole and the inner diameter of the yoke of the stator. 1
The permanent magnet electric motor according to any one of 2 above.
トを用いて複数の磁極を凸形状に整形したものを回転軸
に固着してなり、それら磁極の隣接同士を異極とし、そ
の界磁の隣接する異極端同士の最短距離が界磁磁極外径
と固定子のヨーク内径との差の距離の２倍の値以上にな
るようにした請求項１ないし１２のいずれか１項に記載
の永久磁石電動機。15. The rotor comprises a plurality of magnetic poles formed in a convex shape by using a plastic magnet and fixed to a rotating shaft. Adjacent magnetic poles are different poles and adjacent magnetic fields are adjacent to each other. The permanent magnet motor according to any one of claims 1 to 12, wherein the shortest distance between the two extremes is set to be equal to or greater than twice the distance between the outer diameter of the field pole and the inner diameter of the yoke of the stator. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002128655A JP2003324865A (en) | 2002-04-30 | 2002-04-30 | Permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002128655A JP2003324865A (en) | 2002-04-30 | 2002-04-30 | Permanent magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003324865A true JP2003324865A (en) | 2003-11-14 |
Family
ID=29542336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002128655A Withdrawn JP2003324865A (en) | 2002-04-30 | 2002-04-30 | Permanent magnet motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003324865A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006136178A (en) * | 2004-11-09 | 2006-05-25 | Mitsui High Tec Inc | Manufacturing method of stacked stator core |
| JP2009044825A (en) * | 2007-08-07 | 2009-02-26 | Nippo Denki Kk | Slotless motor |
| JP2022038052A (en) * | 2020-08-26 | 2022-03-10 | 日立グローバルライフソリューションズ株式会社 | Electric motor and electric blower |
-
2002
- 2002-04-30 JP JP2002128655A patent/JP2003324865A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006136178A (en) * | 2004-11-09 | 2006-05-25 | Mitsui High Tec Inc | Manufacturing method of stacked stator core |
| JP4707049B2 (en) * | 2004-11-09 | 2011-06-22 | 株式会社三井ハイテック | Manufacturing method of laminated stator core |
| JP2009044825A (en) * | 2007-08-07 | 2009-02-26 | Nippo Denki Kk | Slotless motor |
| JP2022038052A (en) * | 2020-08-26 | 2022-03-10 | 日立グローバルライフソリューションズ株式会社 | Electric motor and electric blower |
| JP7330930B2 (en) | 2020-08-26 | 2023-08-22 | 日立グローバルライフソリューションズ株式会社 | Electric motor and electric blower |
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