JP2007244017A - Rotor structure of rotary electric machine - Google Patents

Rotor structure of rotary electric machine Download PDF

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JP2007244017A
JP2007244017A JP2006059064A JP2006059064A JP2007244017A JP 2007244017 A JP2007244017 A JP 2007244017A JP 2006059064 A JP2006059064 A JP 2006059064A JP 2006059064 A JP2006059064 A JP 2006059064A JP 2007244017 A JP2007244017 A JP 2007244017A
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rotor
permanent magnets
space
adjacent
yoke
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Takashi Kato
崇 加藤
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Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide the rotor structure of a rotary electric machine in which strength of the rotor against centrifugal force and attraction force is enhanced, and output torque is increased by reducing leakage flux furthermore. <P>SOLUTION: Leakage flux of permanent magnets 3a and 3b is intercepted by providing a space 6 to extend over the ends 5 and 5 of two adjoining permanent magnets 3a and 3b. A pawl 7 for restricting radial movement of the yoke 4 of a rotor core 2 held between the permanent magnets 3a and 3b is provided in a part of the yoke 4 contiguous to the space 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、回転電機の内部で高速回転する回転子の強度を高めるための技術、特に、遠心力および界磁から受ける磁力に対して強度上有利な回転子の構造に関するものである。   The present invention relates to a technique for increasing the strength of a rotor that rotates at high speed inside a rotating electric machine, and more particularly to a rotor structure that is advantageous in terms of strength against centrifugal force and magnetic force received from a field.

同期型の回転電機においては、回転子の表面に永久磁石を配置する表面配置型(SPM:Surface. Permanent Magnetic)構造よりも、回転子の内部に永久磁石を多数埋設する内部配置型(IPM:Interior Permanent Magnetic)構造を採用することで磁束を増加することが可能となり、出力が向上する。このような内部配置型の回転子構造としては従来、例えば特許文献1および特許文献2に記載のごときものが知られている。
特許文献1では、回転子の外径側に固定子を配置してこの回転子をインナロータとしたラジアルギャップ型の回転電機において、永久磁石の表面に空隙や空間を設けて、永久磁石端部の漏れ磁束を抑制し、回転子のトルクが低下することを防止する。
特許文献2では、回転子の内径側に固定子を配置してこの回転子をアウタロータとしたラジアルギャップ型の回転電機において、永久磁石の表面に空隙や空間を設けて、永久磁石端部の漏れ磁束を抑制し、回転子のトルクが低下することを防止する。
特開2000−060038号公報 特開2002−356190号公報
In synchronous rotating electrical machines, the internal arrangement type (IPM: embedded with many permanent magnets in the rotor) rather than the surface arrangement type (SPM: Surface. Permanent Magnetic) structure in which permanent magnets are arranged on the rotor surface. By adopting the Interior Permanent Magnetic structure, it becomes possible to increase the magnetic flux and improve the output. As such an internal arrangement type rotor structure, those described in, for example, Patent Document 1 and Patent Document 2 are conventionally known.
In Patent Document 1, in a radial gap type rotating electrical machine in which a stator is disposed on the outer diameter side of a rotor and this rotor is used as an inner rotor, a gap or a space is provided on the surface of the permanent magnet, and Leakage magnetic flux is suppressed and the torque of the rotor is prevented from decreasing.
In Patent Document 2, in a radial gap type rotating electrical machine in which a stator is disposed on the inner diameter side of a rotor and the rotor is used as an outer rotor, a gap or a space is provided on the surface of the permanent magnet, and leakage of the end of the permanent magnet occurs. The magnetic flux is suppressed and the torque of the rotor is prevented from decreasing.
JP 2000-060038 A JP 2002-356190 A

しかし、上記従来のような回転子構造にあっては、以下に説明するような問題を生ずる。 つまり円筒形状のロータコア内部に永久磁石を配列しているため、隣り合う2個の永久磁石に挟まれたロータコアのヨークと、このヨークの隣りに位置するヨークとを、同一材料で一体に結合するよう形成するものの、当該結合部分が強度上の弱点となる。
しかも、永久磁石の表面に空隙や空間を設けた特許文献1および特許文献2に記載の回転子構造では、上述したヨーク同士の結合部分が益々細くなって強度上の弱点になる、という弊害が顕著になる。
However, the conventional rotor structure causes problems as described below. In other words, since the permanent magnets are arranged inside the cylindrical rotor core, the rotor core yoke sandwiched between two adjacent permanent magnets and the yoke located adjacent to the yoke are integrally joined with the same material. Although formed as described above, the joint portion is a weak point in strength.
Moreover, in the rotor structure described in Patent Document 1 and Patent Document 2 in which a gap or a space is provided on the surface of the permanent magnet, the above-described disadvantage is that the joint portion between the yokes becomes thinner and weaker in strength. Become prominent.

この問題につき図7に沿って説明する。
図7は、特許文献1や特許文献2に開示されたごとき従来の回転子構造を、回転子の軸線方向からみて示す横断面図である。
内部配置型の回転子Aは、円筒形状のロータコアBと、ロータコアB内部に埋設された永久磁石C(C1,C2,C3・・・)と、ロータコアBと結合する図示しないロータ出力軸とを具える。ここで、隣り合う2個の永久磁石C1および永久磁石C2を、径方向に延在する規準線に関して線対称となる「ハの字」に配列する。また隣り合う2個の永久磁石C2および永久磁石C3を、径方向に延在する規準線に関して線対称となる「ハの字」に配列する。永久磁石Cの外径側端部Dには空間Eを設ける。永久磁石Cの内径側端部Fには空間Gを設ける。
This problem will be described with reference to FIG.
FIG. 7 is a cross-sectional view showing a conventional rotor structure as disclosed in Patent Document 1 and Patent Document 2 as seen from the axial direction of the rotor.
The internal arrangement type rotor A includes a cylindrical rotor core B, a permanent magnet C (C1, C2, C3...) Embedded in the rotor core B, and a rotor output shaft (not shown) coupled to the rotor core B. Have. Here, two adjacent permanent magnets C1 and C2 are arranged in a “C” shape that is line-symmetric with respect to a reference line extending in the radial direction. Further, two adjacent permanent magnets C2 and C3 are arranged in a “C” shape that is line-symmetric with respect to a reference line extending in the radial direction. A space E is provided at the outer diameter side end D of the permanent magnet C. A space G is provided at the inner diameter side end F of the permanent magnet C.

ロータコアBは永久磁石Cによって周方向に区切られる。隣り合う永久磁石C1,C2に挟まれたロータコアB部分をヨークHとする。永久磁石C1と、永久磁石C1からみて永久磁石C2とは反対側で隣り合う永久磁石C3に挟まれたロータコアB部分をロータコア部位Iとする。これらヨークHおよびロータコア部位Iを、回転子Aの外径側では結合部分Jで一体に結合し、内径側では結合部分Kで一体に結合する。   The rotor core B is divided in the circumferential direction by a permanent magnet C. A rotor core B portion sandwiched between adjacent permanent magnets C1 and C2 is a yoke H. A rotor core portion I is a portion of the rotor core B sandwiched between the permanent magnet C1 and the permanent magnet C3 adjacent to the permanent magnet C2 on the side opposite to the permanent magnet C1. The yoke H and the rotor core portion I are integrally coupled at the coupling portion J on the outer diameter side of the rotor A, and are integrally coupled at the coupling portion K on the inner diameter side.

結合部分Iと結合部分Kは、肉厚が薄いため強度上の弱点となる。したがって、回転子Aを高回転で運転する場合には、強い遠心力が作用してヨークHが外方に飛散するという懸念が生じる。また大トルクで運転する場合には、回転子Aの径方向に設けた固定子界磁との吸引力によって、ヨークHまたはロータコア部位Iが径方向に飛散するという懸念が生じる。そして自動車の動力源として回転電機を採用するにあたり、小型軽量かつ高回転大トルクの回転電機が要求されているもとでは、上述の遠心力および吸引力に由来する回転子の耐久性課題が深刻になる。
しかも、結合部分Jと結合部分Kとは肉厚が薄いとはいえ、永久磁石の端部に近いことから漏れ磁束が若干生じている。したがって、この漏れ磁束を解消して出力トルクの向上を図る余地がある。
Since the connecting portion I and the connecting portion K are thin, they are weak points in strength. Therefore, when the rotor A is operated at a high speed, there is a concern that the strong centrifugal force acts and the yoke H is scattered outward. Further, when operating with a large torque, there is a concern that the yoke H or the rotor core part I is scattered in the radial direction due to the attractive force with the stator field provided in the radial direction of the rotor A. In adopting a rotating electrical machine as a power source for automobiles, there is a demand for a rotating electrical machine having a small size, light weight and high rotation and large torque. become.
Moreover, although the coupling portion J and the coupling portion K are thin, some leakage magnetic flux is generated because they are close to the end of the permanent magnet. Therefore, there is room for eliminating the leakage magnetic flux and improving the output torque.

本発明は、上述の実情に鑑み、遠心力および吸引力に対する回転子の強度を高め、さらには、漏れ磁束をより一層低減して出力トルクを益々大きくすることができる回転電機の回転子構造を提案するものである。   In view of the above circumstances, the present invention provides a rotor structure for a rotating electrical machine that can increase the strength of a rotor against centrifugal force and attractive force, and further reduce leakage magnetic flux and increase output torque. It is what we propose.

この目的のため本発明による回転電機の回転子構造は、請求項1に記載のごとく、
回転子のロータコア内部に周方向に複数の永久磁石を配設し、隣り合う2個の前記永久磁石の端部同士が最も接近する前記ロータコア部分には、該端部同士にまたがる空間を設けた回転電機の回転子において、
該回転子を軸線方向からみたときに、前記隣り合う2個の永久磁石に挟まれた前記ロータコアのヨークのうち前記空間と隣接するヨーク部位には、該ヨークの径方向移動を拘束する爪部を設けたことを特徴としたものである。
For this purpose, the rotor structure of the rotating electrical machine according to the present invention is as described in claim 1,
In the rotor core of the rotor, a plurality of permanent magnets are arranged in the circumferential direction, and the space between the end portions of the two adjacent permanent magnets is provided in the rotor core portion closest to each other. In the rotor of a rotating electrical machine,
When the rotor is viewed from the axial direction, a claw portion that restrains radial movement of the yoke at the yoke portion adjacent to the space among the yokes of the rotor core sandwiched between the two adjacent permanent magnets It is characterized by having provided.

かかる本発明の構成によれば、隣り合う2個の永久磁石の端部同士にまたがる空間を設けたことから、上述した図7に示す結合部分J,Kを設けることがない。したがって永久磁石の端部に生じる漏れ磁束を大幅に低減することができ、出力トルクの向上を図ることができる。
また、結合部分J,Kを撤廃したために懸念される回転子の強度の低下は、隣り合う2個の永久磁石に挟まれたロータコアのヨークに、このヨークの径方向移動を拘束する爪部を設けたことにより解消する。つまり永久磁石の端部同士にまたがって設けた上述の空間に隣接するヨーク部分には爪を設け、この爪をこれら2個の端部に係止するため、ヨークの径方向移動を防止することができる。
したがって、内部配置型の回転子構造に特有の問題であるロータコアの強度の確保と、漏れ磁束の抑制という2つの課題を同時に解決し、高回転かつ大トルクを出力する回転電機の運転に資することができる。
According to the configuration of the present invention, since the space spanning the ends of the two adjacent permanent magnets is provided, the above-described coupling portions J and K shown in FIG. 7 are not provided. Therefore, the leakage magnetic flux generated at the end of the permanent magnet can be greatly reduced, and the output torque can be improved.
In addition, the reduction in the strength of the rotor, which is a concern due to the elimination of the joint portions J and K, is that the claw portion that restrains the radial movement of the yoke is attached to the yoke of the rotor core sandwiched between two adjacent permanent magnets. It is solved by providing it. In other words, the yoke portion adjacent to the above-mentioned space provided across the end portions of the permanent magnet is provided with a claw, and the claw is locked to these two end portions, thereby preventing the yoke from moving in the radial direction. Can do.
Therefore, to solve the two problems of securing the strength of the rotor core, which is a problem peculiar to the internal arrangement type rotor structure, and suppressing the leakage magnetic flux at the same time, to contribute to the operation of the rotating electrical machine that outputs high torque and high torque. Can do.

以下、本発明の実施の形態を、図面に示す実施例に基づき詳細に説明する。
図1は本発明の第1実施例になる回転子構造を、軸線方向からみた状態を示す横断面図である。
この実施例は、固定子と回転子とを回転子の径方向に配置したラジアルギャップ構造の回転電機に係る。
回転子1は、中空円筒形状のロータコア2を具える。ロータコア2は薄板鋼板を軸線方向に積層してなる。あるいは磁性材料を圧粉成形してもよい。ロータコア2内部には、複数個の永久磁石3を、周方向に配列する。ここで隣り合う2個の永久磁石3a,3bに着目すると、これら隣り合う2個の永久磁石3a,3bを、径方向に延在する規準線Kに関して線対称となるようロータコア2内部に配設して対とする。
具体的には永久磁石3a,3bを「ハの字」の対に配置し、この対を構成する永久磁石3a,3b同士の間隔を、径方向外方では広く、径方向内方では狭くする。
Hereinafter, embodiments of the present invention will be described in detail based on examples shown in the drawings.
FIG. 1 is a cross-sectional view showing the rotor structure according to the first embodiment of the present invention as seen from the axial direction.
This embodiment relates to a rotating electrical machine having a radial gap structure in which a stator and a rotor are arranged in the radial direction of the rotor.
The rotor 1 includes a hollow cylindrical rotor core 2. The rotor core 2 is formed by laminating thin steel plates in the axial direction. Alternatively, the magnetic material may be compacted. A plurality of permanent magnets 3 are arranged in the circumferential direction inside the rotor core 2. When attention is paid to the two adjacent permanent magnets 3a and 3b, the two adjacent permanent magnets 3a and 3b are arranged inside the rotor core 2 so as to be symmetrical with respect to the reference line K extending in the radial direction. Then make a pair.
Specifically, the permanent magnets 3a and 3b are arranged in a pair of “C” s, and the interval between the permanent magnets 3a and 3b constituting the pair is widened radially outward and narrowly radially inward. .

隣り合う2個の永久磁石3a,3bの端部5同士が最も接近するロータコア2の内径側部分には漏れ磁束を抑制するための空間6を設ける。空間6は永久磁石3aの端部5と永久磁石3bの端部5とにまたがって配置されることから、最も効果的に漏れ磁束を抑制することができる。
ここで付言すると、同じ空間であっても図7に示すように空間Gにあっては、結合部分Kを設けていることから、空間Gが端部同士にまたがっておらず、漏れ磁束が結合部分Kを通過してしまい、漏れ磁束を効果的に抑制することができない。
また、同じ空間であっても図7に示すように空間Eにあっては、端部に接触して結合部分Jを設けていることから、漏れ磁束が結合部分Jを通過してしまい、漏れ磁束を効果的に抑制することができない。
A space 6 for suppressing leakage magnetic flux is provided in the inner diameter side portion of the rotor core 2 where the end portions 5 of the two adjacent permanent magnets 3a and 3b are closest to each other. Since the space 6 is disposed across the end portion 5 of the permanent magnet 3a and the end portion 5 of the permanent magnet 3b, the leakage magnetic flux can be most effectively suppressed.
In other words, even in the same space, as shown in FIG. 7, in the space G, since the coupling portion K is provided, the space G does not extend over the ends, and the leakage magnetic flux is coupled. The portion K is passed, and the leakage magnetic flux cannot be effectively suppressed.
Further, even in the same space, as shown in FIG. 7, in the space E, since the coupling portion J is provided in contact with the end portion, the leakage magnetic flux passes through the coupling portion J and leaks. Magnetic flux cannot be effectively suppressed.

説明を図1に戻すと、板状の永久磁石3a,3bには、厚み方向(短辺方向)に着磁しておき、これら永久磁石3a,3bに挟まれたロータコア2のヨーク4に向けて同極になす。
そして、回転子1の外径側に設けた図示しない固定子の界磁との関係で、ヨーク4を通過する磁束量を大きくする。
Returning to FIG. 1, the plate-like permanent magnets 3a and 3b are magnetized in the thickness direction (short-side direction) and directed toward the yoke 4 of the rotor core 2 sandwiched between the permanent magnets 3a and 3b. And make the same polarity.
The amount of magnetic flux passing through the yoke 4 is increased in relation to the field of a stator (not shown) provided on the outer diameter side of the rotor 1.

略三角状のヨーク4のうち、空間6に隣接するヨーク部位には爪部7を設ける。
爪部7は、周方向両側にある端部5,5に係止して、ヨーク4が径方向に移動しないように拘束する。
なお図2には、図1に示す爪部7と外観上共通する構成を拡大して示す。
図1および図2に示すように爪部7は二等辺三角形状の頂点になるヨーク部位に位置する。
そして爪部7の形状を、永久磁石3の端部5を形成する直角部分と同一の隅角として、爪部7とヨーク4との接合箇所をこれら隅角に挟まれて基準線Kに対し垂直方向に狭隘として、端部5,5を係止することから、三角形状のヨーク4が永久磁石3から離れるよう外径方向に移動することを規制する。逆に言えば、もし当該三角形状の頂点に爪部7がない場合、三角形状のヨーク4は当該二等辺三角形状の2辺を形成する永久磁石3から離れ易くなる。
また二等辺三角形状のヨーク4が永久磁石3を内径方向に押し抜くよう移動しようとしても、回転子1自身のアーチ効果により、内径方向に移動することを規制する。
かくしてヨーク4は径方向に移動しないように拘束される。
A claw portion 7 is provided at a yoke portion adjacent to the space 6 in the substantially triangular yoke 4.
The claw portion 7 is engaged with the end portions 5 and 5 on both sides in the circumferential direction to restrain the yoke 4 from moving in the radial direction.
FIG. 2 shows an enlarged configuration that is common in appearance with the claw portion 7 shown in FIG.
As shown in FIG. 1 and FIG. 2, the claw portion 7 is located at a yoke portion that becomes an apex of an isosceles triangle.
Then, the shape of the claw portion 7 is set to the same corner angle as the right-angled portion forming the end portion 5 of the permanent magnet 3, and the joint portion between the claw portion 7 and the yoke 4 is sandwiched between these corner angles with respect to the reference line K. Since the ends 5 and 5 are locked in a narrow manner in the vertical direction, the triangular yoke 4 is restricted from moving in the outer diameter direction away from the permanent magnet 3. In other words, if there is no claw portion 7 at the apex of the triangle, the triangular yoke 4 is easily separated from the permanent magnet 3 that forms the two sides of the isosceles triangle.
Further, even if the isosceles triangular yoke 4 tries to move so as to push out the permanent magnet 3 in the inner diameter direction, it is restricted from moving in the inner diameter direction by the arch effect of the rotor 1 itself.
Thus, the yoke 4 is restrained from moving in the radial direction.

図1および図2に示すように永久磁石3a,3bは「ハの字」配置されるところ、これら永久磁石3a,3b同士の間隔が最も狭い端部5,5に、ヨーク4の爪部7を係合したことから、遠心力によってヨーク4に径方向外向きの力が作用しても、ヨーク4は当該径方向外向きの力に対抗することができる。また、径方向内向きの力が作用しても、当該径方向内向きの力に対抗することができる。   As shown in FIGS. 1 and 2, the permanent magnets 3 a and 3 b are arranged in a “C” shape. Thus, even if a radially outward force is applied to the yoke 4 by centrifugal force, the yoke 4 can counter the radially outward force. Further, even if a radially inward force acts, it is possible to counter the radially inward force.

したがって、上述した第1実施例では、ヨーク4が径方向に移動しないよう回転子1の強度を確保することができる。   Therefore, in the first embodiment described above, the strength of the rotor 1 can be ensured so that the yoke 4 does not move in the radial direction.

次に本発明の第2実施例について説明する。
図2は、第2実施例になる回転子11の横断面を展開し、その一部を拡大して示す周方向展開図である。
この第2実施例も固定子と回転子とを回転子の径方向に配置したラジアルギャップ構造の回転電機に係る。
そして漏れ磁束を抑制するための空間を、内径側のみならず外径(固定子)側にも配置した回転子構造であるため基本構造は上述した第1実施例と共通する。そこで共通する構成には同一符号を付して説明を省略し、付加した構成については新た符号を付して説明する。
Next, a second embodiment of the present invention will be described.
FIG. 2 is a developed circumferential view of the rotor 11 according to the second embodiment, in which a transverse section is developed and a part thereof is enlarged.
The second embodiment also relates to a rotating electrical machine having a radial gap structure in which a stator and a rotor are arranged in the radial direction of the rotor.
The basic structure is the same as that of the first embodiment described above because the rotor structure has a space for suppressing leakage magnetic flux not only on the inner diameter side but also on the outer diameter (stator) side. Therefore, common components are denoted by the same reference numerals and description thereof is omitted, and added components are described by adding new symbols.

この第2実施例では、回転子の内径側および外径側の双方に空間6,9を設けたことを特徴とする。
回転子11を図2に示すように軸線方向からみたときに、永久磁石3a,3bは1の対3cを構成する。この対3cは周方向に複数配設される。1の対3cと隣り合う他の対3cとに挟まれたロータコア部位8を、径方向内側では広く径方向外側では狭くする。図2中、矢で示す「径方向固定子側」は径方向外側である。ロータコア8およびヨーク4は周方向(図2紙面の横方向)に交互に配設されてロータコア2を構成する。
The second embodiment is characterized in that spaces 6 and 9 are provided on both the inner diameter side and the outer diameter side of the rotor.
When the rotor 11 is viewed from the axial direction as shown in FIG. 2, the permanent magnets 3a and 3b constitute a pair 3c. A plurality of pairs 3c are arranged in the circumferential direction. The rotor core portion 8 sandwiched between one pair 3c and another adjacent pair 3c is made wider on the radially inner side and narrower on the radially outer side. In FIG. 2, the “radial stator side” indicated by an arrow is the radially outer side. The rotor core 8 and the yoke 4 are alternately arranged in the circumferential direction (the horizontal direction in FIG. 2) to constitute the rotor core 2.

ロータコア2のうち径方向内側には前述した空間6を設ける。
ロータコア2のうち径方向外側にはさらに空間9を設ける。空間9は、ロータコア部位8のうち上記の狭くしたロータコア部位8sに隣接する2個の永久磁石3aの端部10と永久磁石3bの端部10にまたがる。
この空間9に隣接する上記の狭くしたロータコア部位8sには爪部12を設ける。
The space 6 described above is provided on the radially inner side of the rotor core 2.
A space 9 is further provided on the radially outer side of the rotor core 2. The space 9 spans the end portion 10 of the two permanent magnets 3a and the end portion 10 of the permanent magnet 3b adjacent to the narrowed rotor core portion 8s of the rotor core portion 8.
A claw portion 12 is provided in the narrowed rotor core portion 8 s adjacent to the space 9.

爪部12も前述した爪部7と同様の機能を具える。そして、爪部12の周方向両側にある永久磁石3の端部10,10に係止して、端部10を介して爪部12とは反対側にあるヨーク4が径方向に移動しないように拘束する。   The claw portion 12 also has the same function as the claw portion 7 described above. Then, the yoke 4 on the side opposite to the claw portion 12 is prevented from moving in the radial direction via the end portion 10 by being locked to the end portions 10 of the permanent magnet 3 on both sides of the claw portion 12 in the circumferential direction. To be restrained.

この第2実施例によれば、空間9は永久磁石3aの端部10と永久磁石3bの端部10とにまたがって配置されることから、最も効果的に漏れ磁束を抑制することができる。つまり、図7に示す従来例では結合部分Jおよび結合部分Kとは肉厚が薄いとはいえ、永久磁石の端部に近いことから漏れ磁束が若干生じていた。これに対し、図2に示す第2実施例では空間9によって、狭くしたロータコア部位8sが隣り合うヨーク4と全く結合しない。したがって、端部10における漏れ磁束を大いに解消して出力トルクの向上を図ることができる。   According to the second embodiment, since the space 9 is disposed across the end 10 of the permanent magnet 3a and the end 10 of the permanent magnet 3b, the leakage magnetic flux can be most effectively suppressed. That is, in the conventional example shown in FIG. 7, although the joint portion J and the joint portion K are thin, leakage flux is slightly generated because it is close to the end portion of the permanent magnet. In contrast, in the second embodiment shown in FIG. 2, the narrowed rotor core portion 8 s is not coupled to the adjacent yoke 4 at all by the space 9. Therefore, the leakage magnetic flux at the end portion 10 can be largely eliminated and the output torque can be improved.

ロータコア部位8のうち、空間9および爪部12から遠い位置にあって両側の空間6,6に隣接する部位には、爪部13をそれぞれ設ける。爪部13は端部5を形成する直角部分と同一の隅角を具えてこの端部5に係止する。   Of the rotor core portion 8, the claw portions 13 are respectively provided at portions far from the space 9 and the claw portion 12 and adjacent to the spaces 6 and 6 on both sides. The claw portion 13 has the same corner as the right-angled portion forming the end portion 5 and is locked to the end portion 5.

また、ヨーク4のうち、空間6および爪部7から遠い位置にあって両側の空間9,9に隣接する部位には、爪部14をそれぞれ設ける。爪部14は端部10を形成する直角部分と同一の隅角を具えてこの端部10に係止する。   Further, claw portions 14 are respectively provided in portions of the yoke 4 that are located far from the space 6 and the claw portion 7 and are adjacent to the spaces 9 and 9 on both sides. The claw portion 14 has the same corner as the right-angled portion forming the end portion 10 and is locked to the end portion 10.

上述した爪部7、12、13、14は、第1実施例と同様に、ヨーク4が径方向外側に飛び出すことを防止する。つまり、遠心力によってヨーク4に径方向外向きの力が作用するとき、ヨーク4の爪部7は当該径方向外向きの力に対抗する。また遠心力および上述した爪部7によって永久磁石3に径方向外向きの力が作用するとき、爪部7、12、13、14が永久磁石3に係合してヨーク4が径方向外向きに飛び出すことを防止する。   The claw portions 7, 12, 13, and 14 described above prevent the yoke 4 from jumping outward in the radial direction, as in the first embodiment. That is, when a radially outward force is applied to the yoke 4 by centrifugal force, the claw portion 7 of the yoke 4 opposes the radially outward force. Further, when a radially outward force is applied to the permanent magnet 3 by the centrifugal force and the claw portion 7 described above, the claw portions 7, 12, 13, 14 are engaged with the permanent magnet 3 so that the yoke 4 is radially outward. To prevent jumping out.

永久磁石3bおよび3aは、空間6と空間9との間を長手方向として配置した板状であり、この長手方向とは垂直な厚み方向に着磁される。そして、永久磁石3bおよび3aをヨーク4に向けて同極にする。回転子11の径方向外方には図示しない固定子コアを配置し、インナロータ構造とする。固定子コアを上述したヨーク4に指向させる。あるいは図2の他、固定子を径方向内方に配置したアウタロータ構造としてもよい。   The permanent magnets 3b and 3a are plate-shaped with the space 6 and the space 9 disposed in the longitudinal direction, and are magnetized in the thickness direction perpendicular to the longitudinal direction. Then, the permanent magnets 3 b and 3 a have the same polarity toward the yoke 4. A stator core (not shown) is arranged on the outer side in the radial direction of the rotor 11 to form an inner rotor structure. The stator core is directed to the yoke 4 described above. Or it is good also as an outer-rotor structure which has arrange | positioned the stator to radial inside in addition to FIG.

ここで付言すると、固定子近傍にある空間9と固定子から離れて位置する空間6とのうち、離れて位置する前記空間6を、図2に示すように軸線方向に延在する孔としてもよいこのように孔とすることで、この孔を区画する結合部分15が、隣り合うヨーク8,8同士を結合する。したがって、回転子11の強度を益々確保することができる。しかも、結合部分15の両端にある1対の永久磁石3cはヨーク4に向けて同極に配置しているため、結合部分15で漏れ磁束が生じることはない。
なお図には示さなかったが、図2において空間9を軸線方向に延在する孔としてもよい。
In this case, the space 6 positioned apart from the space 9 in the vicinity of the stator and the space 6 positioned away from the stator may be a hole extending in the axial direction as shown in FIG. By forming a hole in this way, the connecting portion 15 that defines the hole connects the adjacent yokes 8 and 8 together. Therefore, the strength of the rotor 11 can be secured more and more. In addition, since the pair of permanent magnets 3 c at both ends of the coupling portion 15 are disposed in the same polarity toward the yoke 4, no leakage magnetic flux is generated in the coupling portion 15.
Although not shown in the figure, the space 9 in FIG. 2 may be a hole extending in the axial direction.

次に本発明の第3実施例について説明する。
図3は、第3実施例になる回転子21の横断面を展開して示す周方向展開図である。
この第3実施例も固定子と回転子とを回転子の径方向に配置したラジアルギャップ構造の回転電機に係る。
そして漏れ磁束を抑制するための空間を、内径側のみならず外径(固定子)側にも配置した回転子構造であるため基本構造は上述した第1実施例と共通する。そこで共通する構成には同一符号を付し、付加した構成については新た符号を付して説明する。
Next, a third embodiment of the present invention will be described.
FIG. 3 is a developed circumferential view showing a cross section of the rotor 21 according to the third embodiment.
This third embodiment also relates to a rotating electrical machine having a radial gap structure in which a stator and a rotor are arranged in the radial direction of the rotor.
The basic structure is the same as that of the first embodiment described above because the rotor structure has a space for suppressing leakage magnetic flux not only on the inner diameter side but also on the outer diameter (stator) side. Therefore, the same reference numerals are given to common components, and the added components will be described with new reference symbols.

この第3実施例では、回転子の外径側および内径側の双方に空間6,9を設ける。そしてヨーク4のうち径方向内側の空間6に隣接する部分に設けた爪7と比較して、ロータコア部位8のうち径方向外側の空間9に隣接する部分に設けた爪部22を大きくしたことを特徴とする。   In the third embodiment, spaces 6 and 9 are provided on both the outer diameter side and the inner diameter side of the rotor. And compared with the claw 7 provided in the part adjacent to the space 6 inside radial direction among the yoke 4, the claw part 22 provided in the part adjacent to the space 9 outside radial direction among the rotor core parts 8 was enlarged. It is characterized by.

図3は、第3実施例の回転子を軸線方向からみた状態を示す横断面図である。
周方向で隣り合う永久磁石3aおよび永久磁石3bは、径方向に延在する規準線Kに関して線対称となるようロータコア2内部に配設して対3cとする。そして対3cをなす永久磁石3a,3b同士の間隔を、径方向外方では広く、径方向内方では狭くする。
ロータコア2には、対3cをなす永久磁石3a,3bの径方向内側端部にまたがる空間6を設け、対3cをなす2個の永久磁石3a,3bに挟まれたヨーク4のうち空間6と隣接するヨーク部位には前述した第1実施例(図1)と同様の爪部7を設ける。
FIG. 3 is a cross-sectional view showing a state in which the rotor of the third embodiment is viewed from the axial direction.
The permanent magnet 3a and the permanent magnet 3b adjacent in the circumferential direction are disposed inside the rotor core 2 so as to be a pair 3c so as to be symmetrical with respect to the reference line K extending in the radial direction. The interval between the permanent magnets 3a and 3b forming the pair 3c is widened radially outward and narrowed radially inward.
The rotor core 2 is provided with a space 6 spanning the radially inner ends of the permanent magnets 3a and 3b forming the pair 3c, and the space 6 of the yoke 4 sandwiched between the two permanent magnets 3a and 3b forming the pair 3c. Adjacent yoke portions are provided with the same claw portion 7 as in the first embodiment (FIG. 1).

図3に示すように対3cを周方向に複数対配置する。周方向で隣り合う対3c,3c同士に挟まれたロータコア部位8を、径方向外方では広く径方向内方では狭くする。狭くしたロータコア部位8sに隣接する2個の永久磁石3の端部10,10にまたがる空間9を設ける。空間9に隣接する狭くしたロータコア部位8sには爪部22を設ける。
爪部22は、爪部7と比較して径方向に肉厚に形成され、ロータコア部位8と端部10とが径方向に離れないよう強固に連結する。
As shown in FIG. 3, a plurality of pairs 3c are arranged in the circumferential direction. The rotor core portion 8 sandwiched between the pairs 3c and 3c adjacent to each other in the circumferential direction is widened radially outward and narrowed radially inward. A space 9 is provided across the end portions 10, 10 of the two permanent magnets 3 adjacent to the narrowed rotor core portion 8s. A claw portion 22 is provided in the narrowed rotor core portion 8 s adjacent to the space 9.
The claw portion 22 is formed to be thicker in the radial direction than the claw portion 7 and firmly connects the rotor core portion 8 and the end portion 10 so as not to be separated in the radial direction.

図4には、第3実施例を拡大して示す。
ロータコア部位8のうち、空間9および爪部22から遠い位置にあって両側の空間6,6に隣接する部位には、爪部13をそれぞれ設ける。爪部13は端部5を形成する直角部分と同一の隅角を具えてこの端部5に係止する。
FIG. 4 shows an enlarged view of the third embodiment.
Of the rotor core portion 8, a claw portion 13 is provided in a portion far from the space 9 and the claw portion 22 and adjacent to the spaces 6 and 6 on both sides. The claw portion 13 has the same corner as the right-angled portion forming the end portion 5 and is locked to the end portion 5.

また、ヨーク4のうち、空間6および爪部7から遠い位置にあって両側の空間9,9に隣接する部位には、爪部14をそれぞれ設ける。爪部14は、端部5とは反対側の端部10を形成する直角部分と同一の隅角を具えてこの端部10に係止する。   Further, claw portions 14 are respectively provided in portions of the yoke 4 that are located far from the space 6 and the claw portion 7 and adjacent to the spaces 9 and 9 on both sides. The claw portion 14 has the same corner as the right-angled portion that forms the end portion 10 opposite to the end portion 5, and is locked to the end portion 10.

上述した爪部7、12、13、14は、図2に示す第2実施例と同様に、ヨーク4が径方向外側に飛び出すことを防止する。つまり、遠心力によってヨーク4に径方向外向きの力が作用するとき、ヨーク4の爪部7は当該径方向外向きの力に対抗する。また遠心力および上述した爪部7によって永久磁石3(3a,3b,3c)に径方向外向きの力が作用するとき、爪部7、12、13、14が永久磁石3に係合してヨーク4が径方向外向きに飛び出すことを防止する。   The claw portions 7, 12, 13, and 14 described above prevent the yoke 4 from jumping outward in the radial direction as in the second embodiment shown in FIG. That is, when a radially outward force is applied to the yoke 4 by centrifugal force, the claw portion 7 of the yoke 4 opposes the radially outward force. Further, when a radially outward force is applied to the permanent magnet 3 (3a, 3b, 3c) by the centrifugal force and the claw portion 7 described above, the claw portions 7, 12, 13, 14 are engaged with the permanent magnet 3. The yoke 4 is prevented from jumping out radially outward.

図3に示す第3実施例では、回転子21の径方向外方に図示しない固定子を設け、固定子のコアをヨーク4に指向させてインナロータ構造とする。
永久磁石対3cおよび固定子間にはギャップを介して磁気回路が形成されるので、空間9をギャップに向けて開放し、漏れ磁束を解消する。
これにより、回転子21のトルク増大を図ることができる。
In the third embodiment shown in FIG. 3, a stator (not shown) is provided radially outward of the rotor 21, and the core of the stator is directed to the yoke 4 to form an inner rotor structure.
Since a magnetic circuit is formed between the permanent magnet pair 3c and the stator through a gap, the space 9 is opened toward the gap to eliminate the leakage magnetic flux.
Thereby, the torque increase of the rotor 21 can be aimed at.

また、固定子から離れて位置する空間6は、ロータコア2に設けた軸線方向に延在する孔とし、この孔を区画する結合部分15が隣り合うヨーク8,8同士を結合する。   The space 6 located away from the stator is a hole provided in the rotor core 2 that extends in the axial direction, and a connecting portion 15 that divides this hole connects adjacent yokes 8 and 8 together.

次に本発明の第4実施例について説明する。
図5は、第4実施例になる回転子31を、軸線方向からみた状態を示す横断面図である。
この第4実施例も固定子と回転子とを回転子の径方向に配置したラジアルギャップ構造の回転電機に係る。
そして漏れ磁束を抑制するための空間を、内径側および外径(固定子)側にも配置した回転子構造であるため基本構造は上述した第3実施例と共通する。そこで共通する構成には同一符号を付して説明を省略し、異なる構成について説明する。
回転子31の径方向外方には図示しない固定子を設け、回転子31をインナロータとする。ロータコア2内部に設けた永久磁石3(3a,3b,3c)は、円弧面を具えた板状とする。つまり、永久磁石対3cがヨーク4を包むような形状および配置として、ヨーク4に接触する永久磁石3の面積を大きくする。この第4実施例では前述した第1〜第3実施例における「ハの字」状の永久磁石対3cと比較して、ヨーク4を通過する磁束量を大きくして大トルク運転に資することができる。
このように構成しても、本発明の効果である、漏れ磁束を大幅に解消し、かつ強度上有利な回転子構造を実現することができる。
Next, a fourth embodiment of the present invention will be described.
FIG. 5 is a cross-sectional view showing a state in which the rotor 31 according to the fourth embodiment is viewed from the axial direction.
The fourth embodiment also relates to a rotating electrical machine having a radial gap structure in which a stator and a rotor are arranged in the radial direction of the rotor.
The basic structure is the same as that of the third embodiment described above because the rotor structure has a space for suppressing the leakage magnetic flux on the inner diameter side and the outer diameter (stator) side. Therefore, common configurations are denoted by the same reference numerals, description thereof is omitted, and different configurations are described.
A stator (not shown) is provided outside the rotor 31 in the radial direction, and the rotor 31 is an inner rotor. The permanent magnets 3 (3a, 3b, 3c) provided in the rotor core 2 are plate-shaped with arcuate surfaces. That is, the area of the permanent magnet 3 in contact with the yoke 4 is increased so that the permanent magnet pair 3 c wraps around the yoke 4. In the fourth embodiment, the amount of magnetic flux passing through the yoke 4 can be increased to contribute to a large torque operation as compared with the "C" -shaped permanent magnet pair 3c in the first to third embodiments described above. it can.
Even if comprised in this way, the magnetic flux which is the effect of this invention can be eliminated significantly and the rotor structure advantageous in strength can be realized.

次に本発明の第5実施例について説明する。
図6は、第5実施例になる回転子41を、軸線方向からみた状態を示す横断面図である。
この第5実施例も固定子と回転子とを回転子の径方向に配置したラジアルギャップ構造の回転電機に係る。
そして漏れ磁束を抑制するための空間を、内径側および外径(固定子)側にも配置した回転子構造であるため基本構造は上述した第3実施例と共通する。そこで共通する構成には同一符号を付して説明を省略し、異なる構成について説明する。
回転子41の径方向内方には図示しない固定子を設け、回転子41をアウタロータとする。そしてロータコア2内径側にヨーク4を設ける。このように構成しても、本発明の効果である、漏れ磁束を大幅に解消し、かつ強度上有利な回転子構造を実現することができる。
Next, a fifth embodiment of the present invention will be described.
FIG. 6 is a cross-sectional view showing a state in which the rotor 41 according to the fifth embodiment is viewed from the axial direction.
The fifth embodiment also relates to a rotating electrical machine having a radial gap structure in which a stator and a rotor are arranged in the radial direction of the rotor.
The basic structure is the same as that of the third embodiment described above because the rotor structure has a space for suppressing the leakage magnetic flux on the inner diameter side and the outer diameter (stator) side. Therefore, common configurations are denoted by the same reference numerals, description thereof is omitted, and different configurations are described.
A stator (not shown) is provided inside the rotor 41 in the radial direction, and the rotor 41 is an outer rotor. A yoke 4 is provided on the inner diameter side of the rotor core 2. Even if comprised in this way, the magnetic flux leakage which is the effect of this invention can be eliminated significantly and the rotor structure advantageous in terms of strength can be realized.

ところで上述した各実施例によれば、回転子1,11,21,31,41のロータコア2内部に周方向に複数の永久磁石3を配設し、隣り合う2個の永久磁石3a,3bの端部5,5同士が最も接近するロータコア2の部分には、これら端部5,5同士にまたがる空間6を設けた。
そして、回転子1を軸線方向からみたときに、これら隣り合う2個の永久磁石3a,3bに挟まれたロータコア2のヨーク4のうち空間6と隣接するヨーク部位には、ヨーク4の径方向移動を拘束する爪部7を設けた。
これにより、永久磁石3a,3bの端部5,5に生じる漏れ磁束を大幅に低減することができ、磁気回路の主磁束が増大して出力トルクの向上を図ることができる。
また、爪部7がヨーク4と端部5,5とを径方向移動不能に連結して、ヨーク4の径方向移動を防止することができる。
したがって、内部配置型の回転子構造に特有の問題であるロータコアの強度の確保と、漏れ磁束の抑制という2つの課題を同時に解決し、高回転かつ大トルクを出力する回転電機の運転に資することができる。
By the way, according to the above-described embodiments, a plurality of permanent magnets 3 are arranged in the circumferential direction inside the rotor core 2 of the rotors 1, 11, 21, 31, and 41, and the two permanent magnets 3a and 3b adjacent to each other. In the portion of the rotor core 2 where the end portions 5 and 5 are closest to each other, a space 6 that extends over the end portions 5 and 5 is provided.
When the rotor 1 is viewed from the axial direction, the yoke 4 adjacent to the space 6 in the yoke 4 of the rotor core 2 sandwiched between the two adjacent permanent magnets 3a and 3b is arranged in the radial direction of the yoke 4. A claw portion 7 for restraining movement was provided.
Thereby, the leakage magnetic flux which arises in the edge parts 5 and 5 of permanent magnet 3a, 3b can be reduced significantly, the main magnetic flux of a magnetic circuit can increase, and the improvement of output torque can be aimed at.
Further, the claw portion 7 connects the yoke 4 and the end portions 5 and 5 so as not to move in the radial direction, thereby preventing the yoke 4 from moving in the radial direction.
Therefore, to solve the two problems of securing the strength of the rotor core, which is a problem peculiar to the internal arrangement type rotor structure, and suppressing the leakage magnetic flux at the same time, to contribute to the operation of the rotating electrical machine that outputs high torque and high torque. Can do.

具体的には、回転子1を軸線方向からみた図1に示すように、隣り合う2個の永久磁石3a,3bを、径方向に延在する規準線Kに関して線対称となるようロータコア2内部に配設して対3cとし、対3cをなす永久磁石同士3a,3bの間隔を、径方向外方では広く、径方向内方では狭くする。これにより対3cをなす永久磁石3a,3bの径方向内側端部5,5同士が最も接近する。これら端部5,5にまたがる空間6を設け、対3cをなす2個の永久磁石3a,3bに挟まれたヨーク4のうち空間6と隣接するヨーク部位には爪部7を設ける。
これにより、漏れ磁束を大幅に低減して強度上有利な回転電機を実現することができる。
Specifically, as shown in FIG. 1 in which the rotor 1 is viewed from the axial direction, the two adjacent permanent magnets 3a and 3b are symmetrically arranged with respect to the reference line K extending in the radial direction. The permanent magnets 3a and 3b forming the pair 3c are widened radially outward and narrowed radially inward. As a result, the radially inner ends 5 and 5 of the permanent magnets 3a and 3b forming the pair 3c are closest to each other. A space 6 spanning these end portions 5 and 5 is provided, and a claw portion 7 is provided at a yoke portion adjacent to the space 6 among the yokes 4 sandwiched between the two permanent magnets 3a and 3b forming the pair 3c.
As a result, it is possible to realize a rotating electrical machine that is advantageous in terms of strength by greatly reducing the leakage magnetic flux.

あるいは、回転子41を軸線方向からみた図6に示すように、隣り合う2個の永久磁石を3a,3bを径方向に延在する規準線Kに関して線対称となるようロータコア2内部に配設して対3cとし、対3cをなす永久磁石3a,3b同士の間隔を、径方向内方では広く、径方向外方では狭くする。これにより対3cをなす永久磁石3a,3bの径方向外側端部5,5同士が最も接近する。これら端部5,5にまたがる空間6を設け、対3cをなす2個の永久磁石3a,3bに挟まれたヨーク4のうち空間6と隣接するヨーク部位には爪部7を設ける。   Alternatively, as shown in FIG. 6 when the rotor 41 is viewed from the axial direction, two adjacent permanent magnets are arranged inside the rotor core 2 so as to be line-symmetric with respect to a reference line K extending in the radial direction of 3a and 3b. Thus, a pair 3c is formed, and the interval between the permanent magnets 3a and 3b forming the pair 3c is wide at the radially inner side and narrow at the radially outer side. As a result, the radially outer ends 5 and 5 of the permanent magnets 3a and 3b forming the pair 3c are closest to each other. A space 6 spanning these end portions 5 and 5 is provided, and a claw portion 7 is provided at a yoke portion adjacent to the space 6 among the yokes 4 sandwiched between the two permanent magnets 3a and 3b forming the pair 3c.

さらに回転子41には図6に示すように、対3cを周方向に複数対配置し、隣り合う対3c,3c同士に挟まれたロータコア部位8を、径方向外方では広く径方向内方では狭くし、この狭くしたロータコア部位8sに隣接する2個の永久磁石端部10,10にまたがる空間9を設ける。空間9に隣接する狭くしたロータコア部位8sには爪部12を設ける。
このように永久磁石3の両端5,10にそれぞれ空間6,9を設けることにより、漏れ磁束を最大限低減して回転電機の運転効率を高くすることができる。また回転子11,21,31も同様に永久磁石3の両端5,10にそれぞれ空間6,9を設けた構造であり、同等の効果を奏する。
Further, as shown in FIG. 6, the rotor 41 has a plurality of pairs 3 c arranged in the circumferential direction, and the rotor core portion 8 sandwiched between the adjacent pairs 3 c and 3 c is wide radially outward and radially inward. Then, a space 9 is provided that spans the two permanent magnet end portions 10 and 10 adjacent to the narrowed rotor core portion 8s. A claw portion 12 is provided in the narrowed rotor core portion 8 s adjacent to the space 9.
Thus, by providing the spaces 6 and 9 at both ends 5 and 10 of the permanent magnet 3, respectively, the leakage magnetic flux can be reduced to the maximum and the operating efficiency of the rotating electrical machine can be increased. Similarly, the rotors 11, 21, 31 have a structure in which the spaces 6, 9 are provided at both ends 5, 10 of the permanent magnet 3, respectively.

また図3〜図6に示す各実施例においては、固定子(図示せず)と向かい合うヨーク4を挟む永久磁石対3cを、ヨーク4に向けて同極とする。そして固定子近傍にある空間9と固定子から離れて位置する空間6とのうち、離れて位置する空間6を、ロータコア2に設けた軸線方向に延在する孔としたことから、
孔を区画する結合部分15が隣り合うロータコア部位8,8を連結する。したがって、漏れ磁束の低減効果を最大限享受して、さらに回転子の強度を高めることができる。
Further, in each embodiment shown in FIGS. 3 to 6, the permanent magnet pair 3 c sandwiching the yoke 4 facing the stator (not shown) has the same polarity toward the yoke 4. And, since the space 6 located away from the space 9 located near the stator and the space 6 located away from the stator is a hole extending in the axial direction provided in the rotor core 2,
The connecting portions 15 that define the holes connect the adjacent rotor core portions 8 and 8. Therefore, it is possible to enjoy the effect of reducing the leakage magnetic flux as much as possible and further increase the strength of the rotor.

なお、上述したのはあくまでも本発明の一実施例であり、本発明はその主旨に逸脱しない範囲において種々変更が加えられうるものである。例えば回転子の外周を高強度かつ軽量の補強材、具体的にはケブラー繊維、グラスファイバー繊維またはカーボン繊維からなる補強材で囲繞して、回転子の強度を更に高めてもよい。また本発明の基本構成は、図には示さなかったが回転子と固定子とを軸方向に配置したアキシャルギャップ構造の回転電機にも適用可能である。   The above description is merely an example of the present invention, and the present invention can be variously modified without departing from the spirit of the present invention. For example, the strength of the rotor may be further increased by surrounding the outer periphery of the rotor with a high-strength and lightweight reinforcing material, specifically, a reinforcing material made of Kevlar fiber, glass fiber fiber, or carbon fiber. Although not shown in the drawings, the basic configuration of the present invention can also be applied to a rotating electrical machine having an axial gap structure in which a rotor and a stator are arranged in the axial direction.

本発明の第1実施例になる回転子構造を示す横断面図である。It is a cross-sectional view which shows the rotor structure which becomes 1st Example of this invention. 本発明の第2実施例になる回転子構造を示す展開図である。It is an expanded view which shows the rotor structure which becomes 2nd Example of this invention. 本発明の第3実施例になる回転子構造を示す横断面図である。It is a cross-sectional view showing a rotor structure according to a third embodiment of the present invention. 同実施例を拡大して示す横断面図である。It is a cross-sectional view which expands and shows the Example. 本発明の第4実施例になる回転子構造を示す横断面図である。It is a cross-sectional view showing a rotor structure according to a fourth embodiment of the present invention. 本発明の第5実施例になる回転子構造を示す横断面図である。It is a cross-sectional view showing a rotor structure according to a fifth embodiment of the present invention. 従来一般の回転子構造を示す横断面図である。It is a cross-sectional view showing a conventional general rotor structure.

符号の説明Explanation of symbols

1,11,21,31,41 回転子
2 ロータコア
3,3a,3b,3c 永久磁石
4 ロータコアのヨーク
5 永久磁石端部
6 空間
7 爪部
8 ロータコアの部位
9 空間
10 永久磁石端部
12 爪部
13,14 爪部
15 結合部分

DESCRIPTION OF SYMBOLS 1,11,21,31,41 Rotor 2 Rotor core 3,3a, 3b, 3c Permanent magnet 4 Rotor core yoke 5 Permanent magnet end part 6 Space 7 Claw part 8 Rotor core part 9 Space 10 Permanent magnet end part 12 Claw part 13,14 Claw part 15 Joint part

Claims (5)

回転子のロータコア内部に周方向に複数の永久磁石を配設し、隣り合う2個の前記永久磁石の端部同士が最も接近する前記ロータコア部分には、該端部同士にまたがる空間を設けた回転電機の回転子において、
該回転子を軸線方向からみたときに、前記隣り合う2個の永久磁石に挟まれた前記ロータコアのヨークのうち前記空間と隣接するヨーク部位には、該ヨークの径方向移動を拘束する爪部を設けたことを特徴とする回転電機の回転子構造。
In the rotor core of the rotor, a plurality of permanent magnets are arranged in the circumferential direction, and the space between the end portions of the two adjacent permanent magnets is provided in the rotor core portion closest to each other. In the rotor of a rotating electrical machine,
When the rotor is viewed from the axial direction, a claw portion that restrains radial movement of the yoke at the yoke portion adjacent to the space among the yokes of the rotor core sandwiched between the two adjacent permanent magnets A rotor structure of a rotating electric machine, characterized in that
請求項1に記載の回転電機の回転子構造において、
該回転子を軸線方向からみたときに、前記隣り合う2個の永久磁石を、径方向に延在する規準線に関して線対称となるよう前記ロータコア内部に配設して対とし、該対をなす永久磁石同士の間隔を、径方向外方では広く、径方向内方では狭くし、
該対をなす永久磁石の径方向内側端部にまたがる前記空間を設け、該対をなす2個の永久磁石に挟まれた前記ヨークのうち前記空間と隣接するヨーク部位には前記爪部を設けたことを特徴とする回転電機の回転子構造。
The rotor structure of the rotating electrical machine according to claim 1,
When the rotor is viewed from the axial direction, the two adjacent permanent magnets are disposed inside the rotor core so as to be symmetric with respect to a reference line extending in the radial direction to form a pair. The interval between the permanent magnets is wide at the radially outer side and narrow at the radially inner side,
The space spanning the radially inner end of the pair of permanent magnets is provided, and the claw portion is provided at a yoke portion adjacent to the space among the yokes sandwiched between the two permanent magnets forming the pair. A rotor structure of a rotating electric machine characterized by the above.
請求項1に記載の回転電機の回転子構造において、
該回転子を軸線方向からみたときに、前記隣り合う2個の永久磁石を、径方向に延在する規準線に関して線対称となるよう前記ロータコア内部に配設して対とし、該対をなす永久磁石同士の間隔を、径方向内方では広く、径方向外方では狭くし、
該対をなす永久磁石の径方向外側端部にまたがる前記空間を設け、該対をなす2個の永久磁石に挟まれた前記ヨークのうち前記空間と隣接するヨーク部位には前記爪部を設けたことを特徴とする回転電機の回転子構造。
The rotor structure of the rotating electrical machine according to claim 1,
When the rotor is viewed from the axial direction, the two adjacent permanent magnets are disposed inside the rotor core so as to be symmetric with respect to a reference line extending in the radial direction to form a pair. The interval between the permanent magnets is wide at the radially inner side and narrow at the radially outer side,
The space spanning the radially outer end of the pair of permanent magnets is provided, and the claw portion is provided at a yoke portion adjacent to the space among the yokes sandwiched between the two permanent magnets forming the pair. A rotor structure of a rotating electric machine characterized by the above.
請求項3に記載の回転電機の回転子構造において、
前記対を周方向に複数対配置し、
該回転子を軸線方向からみたときに、隣り合う対同士に挟まれたロータコア部位を、径方向外方では広く径方向内方では狭くし、該狭くしたロータコア部位に隣接する2個の永久磁石端部にまたがる前記空間を設け、該空間に隣接する前記狭くしたロータコア部位には前記爪部を設けたことを特徴とする回転電機の回転子構造。
In the rotor structure of the rotating electrical machine according to claim 3,
A plurality of pairs are arranged in the circumferential direction,
When the rotor is viewed from the axial direction, two permanent magnets adjacent to the narrowed rotor core part are formed such that the rotor core part sandwiched between adjacent pairs is widened radially outward and narrowed radially inward. A rotor structure of a rotating electrical machine, wherein the space extending over an end portion is provided, and the claw portion is provided in the narrowed rotor core portion adjacent to the space.
請求項4に記載の回転電機の回転子構造において、
同極に向かい合って配置された隣り合う2個の永久磁石の端部同士にまたがる前記空間は、ロータコアに設けた軸線方向に延在する孔であることを特徴とする回転電機の回転子構造。

The rotor structure of the rotating electrical machine according to claim 4,
The rotor structure of a rotating electrical machine, wherein the space extending between the ends of two adjacent permanent magnets arranged facing the same pole is a hole provided in a rotor core and extending in the axial direction.

JP2006059064A 2006-03-06 2006-03-06 Rotor structure of rotary electric machine Pending JP2007244017A (en)

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WO2011122111A1 (en) * 2010-03-30 2011-10-06 アイシン・エィ・ダブリュ株式会社 Dynamo electric machine
JP2011211860A (en) * 2010-03-30 2011-10-20 Aisin Aw Co Ltd Rotary electric machine
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WO2014162804A1 (en) * 2013-04-01 2014-10-09 富士電機株式会社 Rotating electrical machine with embedded permanent magnet
JPWO2014162804A1 (en) * 2013-04-01 2017-02-16 富士電機株式会社 Permanent magnet embedded rotary electric machine
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