JP2008211934A - Rotating electrical machine and rotator therefor - Google Patents

Rotating electrical machine and rotator therefor Download PDF

Info

Publication number
JP2008211934A
JP2008211934A JP2007047663A JP2007047663A JP2008211934A JP 2008211934 A JP2008211934 A JP 2008211934A JP 2007047663 A JP2007047663 A JP 2007047663A JP 2007047663 A JP2007047663 A JP 2007047663A JP 2008211934 A JP2008211934 A JP 2008211934A
Authority
JP
Japan
Prior art keywords
rotor
permanent magnet
rotator
peripheral side
electrical machine
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
Application number
JP2007047663A
Other languages
Japanese (ja)
Inventor
Taizo Kusadome
泰三 草留
Norimoto Minoshima
紀元 蓑島
Masaki Saijo
正起 西條
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Industries Corp
Original Assignee
Toyota Industries Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyota Industries Corp filed Critical Toyota Industries Corp
Priority to JP2007047663A priority Critical patent/JP2008211934A/en
Publication of JP2008211934A publication Critical patent/JP2008211934A/en
Pending legal-status Critical Current

Links

Images

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotator of a rotating electrical machine, with which stress concentration in an end part of an inner peripheral side of a rotator of a permanent magnet buried in the rotator so as to cross a radial direction of the rotator can be suppressed and reduction of rotator strength can be suppressed compared to conventional case. <P>SOLUTION: In the rotator of the electrical machine, a plurality of permanent magnets 17 are buried in each magnetic pole of the rotator 14 so as to project toward the inner peripheral side of the rotator 14. Air gaps 20 are arranged so as to continue to the end parts near a d-axis of the permanent magnets 17 buried so as to cross the radial direction of the rotator 14 among the permanent magnets 17. Each air gap 20 is formed in a shape across a corner 17a on the inner peripheral side of the permanent magnet 17 and a center of curvature has a curved face part 20a as an inner part of the permanent magnet 17. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、回転電機の回転子及び回転電機に係り、詳しくは永久磁石が埋設されている回転電機の回転子及び回転電機に関する。   The present invention relates to a rotor of a rotating electrical machine and a rotating electrical machine, and more particularly to a rotor of a rotating electrical machine having a permanent magnet embedded therein and the rotating electrical machine.

永久磁石を回転子（ロータ）のコア（鉄心）に埋め込んだ永久磁石式回転電機（所謂ＩＰＭモータ）は、電流位相を制御することにより、リラクタンストルクを利用することができ、電流位相を制御することにより最大トルクの制御が可能になる。そして、一般に、永久磁石は断面矩形状に形成されているため、永久磁石が装着された装着孔の永久磁石の角部と対応する部分に応力集中が生じ易くなる。そこで、従来、永久磁石の角部と対応する部分に生じる応力集中を抑制した回転子が提案されている（例えば、特許文献１参照。）。特許文献１には、図３（ａ），（ｂ）に示すように、鉄心に形成された磁石用溝５１の隅部（角部）５１ａが、永久磁石５２の角部５２ａと接触するのを避けるように、外側へ円弧状に膨らむように形成することが開示されている。隅部５１ａの形状として、略半円弧状のものと略３／４円弧状のものが開示されている。その結果、応力集中を避けることができるとともに、永久磁石５２の角部５２ａの面取りがされていなくても、永久磁石５２の角部５２ａと磁石用溝５１の隅部５１ａとが接触するのを避けることができる。
特開平９−２９４３４４号公報 A permanent magnet type rotating electrical machine (so-called IPM motor) in which a permanent magnet is embedded in a core (iron core) of a rotor (rotor) can use reluctance torque by controlling the current phase, and control the current phase. This makes it possible to control the maximum torque. In general, since the permanent magnet is formed in a rectangular cross section, stress concentration tends to occur at a portion corresponding to the corner of the permanent magnet of the mounting hole in which the permanent magnet is mounted. Therefore, conventionally, a rotor has been proposed in which stress concentration occurring in a portion corresponding to a corner portion of a permanent magnet is suppressed (see, for example, Patent Document 1). In Patent Document 1, as shown in FIGS. 3A and 3B, the corner (corner) 51 a of the magnet groove 51 formed in the iron core is in contact with the corner 52 a of the permanent magnet 52. In order to avoid this, it is disclosed that the outer wall is formed to swell in an arc shape. As the shape of the corner 51a, a substantially semicircular arc shape and a substantially 3/4 arc shape are disclosed. As a result, stress concentration can be avoided, and even if the corner 52a of the permanent magnet 52 is not chamfered, the corner 52a of the permanent magnet 52 and the corner 51a of the magnet groove 51 are in contact with each other. Can be avoided.
Japanese Patent Laid-Open No. 9-294344

磁石用溝５１に発生する応力集中の大きさは、永久磁石５２の角部５２ａの位置によって異なる。また、永久磁石５２の外側に形成される隅部５１ａの大きさが大きい程、即ち空隙部が大きい程、鉄心の強度の面では好ましくない。ところが、特許文献１の回転子では、磁石用溝５１の隅部５１ａが永久磁石５２の角部５２ａと接触するのを避けるように、隅部５１ａの形状を外側に膨らむ円弧状としている。そして、隅部５１ａの位置に拘わらず、同じ形状で同じ大きさにしている。また、円弧の中心は永久磁石５２の周面または周面より若干外側になるように形成されている。即ち、特許文献１では、単純に永久磁石５２の角部５２ａが磁石用溝５１の隅部５１ａに接触するのを防止することにより応力集中を緩和することが図られており、永久磁石５２の角部５２ａの場所による応力集中の大きさの違いや鉄心の強度に対する配慮は何らなされていない。   The magnitude of the stress concentration generated in the magnet groove 51 varies depending on the position of the corner 52 a of the permanent magnet 52. Further, the larger the size of the corner 51a formed on the outer side of the permanent magnet 52, that is, the larger the gap, the less preferable in terms of the strength of the iron core. However, in the rotor of Patent Document 1, the shape of the corner 51 a is an arc shape that bulges outward so that the corner 51 a of the magnet groove 51 does not come into contact with the corner 52 a of the permanent magnet 52. The same shape and the same size are used regardless of the position of the corner 51a. Further, the center of the arc is formed so as to be slightly outside the peripheral surface of the permanent magnet 52 or the peripheral surface. That is, in Patent Document 1, it is intended to alleviate stress concentration by simply preventing the corner portion 52 a of the permanent magnet 52 from coming into contact with the corner portion 51 a of the magnet groove 51. No consideration is given to the difference in the magnitude of stress concentration depending on the location of the corner 52a and the strength of the iron core.

本発明は、前記従来の問題に鑑みてなされたものであって、その目的は、回転子に回転子の径方向と交差する状態で埋設された永久磁石の回転子内周側の端部における応力集中を抑制することができるとともに、従来技術より回転子の強度の低減を抑制することができる回転電機の回転子及び回転電機を提供することにある。   The present invention has been made in view of the above-described conventional problems, and the object thereof is to provide an end portion on the rotor inner peripheral side of a permanent magnet embedded in the rotor so as to intersect the radial direction of the rotor. An object of the present invention is to provide a rotor of a rotating electrical machine and a rotating electrical machine that can suppress stress concentration and can suppress a reduction in strength of the rotor as compared with the prior art.

前記の目的を達成するため、請求項１に記載の発明は、回転子の各磁極に回転子の内周側に向かって凸となるように複数個の永久磁石が埋め込まれた回転電機の回転子である。そして、前記永久磁石のうち、回転子の径方向と交差する状態で埋設された永久磁石のｄ軸寄りの端部に連続する状態で空隙が設けられ、前記空隙は、前記永久磁石の内周側の角部に跨るように、かつ曲率中心が前記永久磁石の内部になる曲面部を有する形状に形成されている。   In order to achieve the above object, according to the first aspect of the present invention, there is provided a rotating electric machine in which a plurality of permanent magnets are embedded in each magnetic pole of a rotor so as to protrude toward the inner peripheral side of the rotor. A child. And among the said permanent magnet, a space | gap is provided in the state which continues in the edge part near d axis | shaft of the permanent magnet embedded in the state which cross | intersects the radial direction of a rotor, The said space | gap is an inner periphery of the said permanent magnet. It is formed in a shape having a curved surface portion that spans the corner portion on the side and whose center of curvature is inside the permanent magnet.

回転子の径方向と交差する状態で埋設された永久磁石の回転子内周側の端部においては、回転子の回転時、内周側の角部に向かって回転子の内周側から応力が作用する状態となる。この発明では、回転子の永久磁石の内周側角部に跨る曲面部を有する空隙が設けられているため、応力集中が抑制される。また、曲面部の曲率が同じ場合は、曲面部と永久磁石の角部との距離が多少変わっても応力集中の抑制効果は同等となる。そして、この発明では、曲面部はその曲率中心が永久磁石の内部になるように形成されているため、曲率中心が永久磁石の周面または周面より若干外側になるように形成された従来技術に比較して空隙部の体積が小さくなる。したがって、回転子に回転子の径方向と交差する状態で埋設された永久磁石の回転子内周側の端部における応力集中を抑制することができるとともに、従来技術より回転子の強度の低減を抑制することができる。   At the end on the rotor inner circumference side of the permanent magnet embedded in a state intersecting with the radial direction of the rotor, stress is applied from the inner circumference side of the rotor toward the corner on the inner circumference side when the rotor rotates. It will be in the state which acts. In this invention, since the space | gap which has a curved surface part straddling the inner peripheral side corner | angular part of the permanent magnet of a rotor is provided, stress concentration is suppressed. Further, when the curvature of the curved surface portion is the same, the effect of suppressing stress concentration is equivalent even if the distance between the curved surface portion and the corner portion of the permanent magnet changes somewhat. And in this invention, since the curved surface part is formed so that the center of curvature is inside the permanent magnet, the prior art is formed so that the center of curvature is slightly outside the peripheral surface of the permanent magnet or the peripheral surface. Compared to the above, the volume of the gap is reduced. Therefore, it is possible to suppress stress concentration at the end portion on the inner peripheral side of the permanent magnet embedded in the rotor so as to intersect with the radial direction of the rotor, and to reduce the strength of the rotor as compared with the prior art. Can be suppressed.

請求項２に記載の発明は、請求項１に記載の発明において、前記永久磁石は、平板状に形成されるとともに一磁極当たり２個ずつ設けられ、かつ回転子の外周側に向かって拡がるＶ字状に配置されている。この発明では、広く使用されるＶ字状配置の永久磁石を備えた回転子において、請求項１の作用、効果を奏する。   According to a second aspect of the present invention, in the first aspect of the present invention, the permanent magnet is formed in a flat plate shape, and two permanent magnets are provided per one magnetic pole, and expands toward the outer peripheral side of the rotor. It is arranged in a letter shape. In this invention, in the rotor provided with the permanent magnet of the V-shaped arrangement | positioning used widely, there exists an effect | action and effect of Claim 1.

請求項３に記載の発明の回転電機は、請求項１又は請求項２に記載の回転子を備えている。この発明の回転電機は、対応する前記請求項１又は請求項２に記載の発明の作用、効果を奏する。   A rotary electric machine according to a third aspect of the invention includes the rotor according to the first or second aspect. The rotating electrical machine of the present invention exhibits the effects and advantages of the corresponding invention described in claim 1 or claim 2.

本発明によれば、回転子に回転子の径方向と交差する状態で埋設された永久磁石の回転子内周側の端部における応力集中を抑制することができるとともに、従来技術より回転子の強度の低減を抑制することができる回転電機の回転子及び回転電機を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, while being able to suppress the stress concentration in the edge part of the rotor inner peripheral side of the permanent magnet embed | buried in the state which cross | intersects the radial direction of a rotor in a rotor, the rotor of a rotor is more than conventional technology. It is possible to provide a rotor of a rotating electrical machine and a rotating electrical machine that can suppress a reduction in strength.

以下、本発明を電動機に具体化した一実施形態を図１にしたがって説明する。図１（ａ）は電動機の回転子（ロータ）及び固定子（ステータ）全体の１／２の部分に対応する模式図である。   Hereinafter, an embodiment in which the present invention is embodied in an electric motor will be described with reference to FIG. Fig.1 (a) is a schematic diagram corresponding to the half part of the whole rotor (rotor) and stator (stator) of an electric motor.

図１（ａ）に示すように、固定子１１は、円筒状で内側に複数のティース１２が等間隔に設けられている。ティース１２にはコイル（巻線）１３が巻かれている。この実施形態ではコイル１３は分布巻で巻かれている。   As shown to Fig.1 (a), the stator 11 is cylindrical and the some teeth 12 are provided in the inner space at equal intervals. A coil (winding) 13 is wound around the tooth 12. In this embodiment, the coil 13 is wound by distributed winding.

固定子１１の内側には、回転子が配置されている。回転子１４は、円板状の電磁鋼板を複数枚（例えば数十枚）積層したロータコア１５と、ロータコア１５の中心に貫挿されたロータ軸（回転軸）１６とを備えている。そして、回転子１４は、ロータコア１５の外周面がティース１２と所定の間隔を置いた状態で、図示しないハウジングの軸受けにロータ軸１６を介して回転可能に支持されている。   A rotor is disposed inside the stator 11. The rotor 14 includes a rotor core 15 in which a plurality of disk-shaped electromagnetic steel plates (for example, several tens) are stacked, and a rotor shaft (rotating shaft) 16 inserted through the center of the rotor core 15. The rotor 14 is rotatably supported by a bearing of a housing (not shown) via a rotor shaft 16 with the outer peripheral surface of the rotor core 15 spaced apart from the teeth 12.

ロータコア１５には、ロータコア１５を周方向に等分割（この実施形態では８分割）した各仮想領域に、永久磁石１７が２個ずつ回転子１４の径方向と交差する状態で埋め込まれている。各永久磁石１７は、断面矩形の平板状に形成され、回転子１４の外周側に向かって拡がるＶ字状に形成された装着孔１８に装着された状態で埋設されている。即ち、永久磁石１７は、平板状に形成されるとともに一磁極当たり２個ずつ設けられ、かつ回転子１４の外周側に向かって拡がるＶ字状に配置されている。永久磁石１７は、着磁方向が厚さ方向となるように着磁されるとともに、同じ側（例えば、回転子１４の外周側）が同極になるように配置されている。また、隣り合う仮想領域に配置された永久磁石１７は、回転子１４の外周側が異なる極になるように配置されている。例えば、ある一組のＶ字配置の永久磁石１７が、ティース１２側がＳ極になるように配置されると、隣の仮想領域に配置される永久磁石１７は、ティース１２側がＮ極になるように配置される。   In the rotor core 15, two permanent magnets 17 are embedded in each virtual region obtained by equally dividing the rotor core 15 in the circumferential direction (eight divided in this embodiment) so as to intersect the radial direction of the rotor 14. Each permanent magnet 17 is formed in a flat plate shape having a rectangular cross section, and is embedded in a state where it is mounted in a mounting hole 18 formed in a V shape that expands toward the outer peripheral side of the rotor 14. That is, the permanent magnets 17 are formed in a flat plate shape, and two permanent magnets 17 are provided for each magnetic pole, and are arranged in a V shape that expands toward the outer peripheral side of the rotor 14. The permanent magnets 17 are magnetized so that the magnetization direction is the thickness direction, and are arranged so that the same side (for example, the outer peripheral side of the rotor 14) has the same polarity. Moreover, the permanent magnet 17 arrange | positioned at the adjacent virtual area | region is arrange | positioned so that the outer peripheral side of the rotor 14 may become a different pole. For example, when a set of V-shaped permanent magnets 17 are arranged so that the teeth 12 side is the S pole, the permanent magnets 17 arranged in the adjacent virtual region are arranged so that the teeth 12 side is the N pole. Placed in.

図１（ｂ）に示すように、回転子１４（ロータコア１５）には、永久磁石１７のｑ軸２２側の端部に連続する状態でフラックスバリア（孔）１９が設けられ、ｄ軸側の端部に連続する状態で空隙２０が設けられている。図１（ｃ）に示すように、空隙２０は、回転子１４のｄ軸２１寄りで永久磁石１７の内周側の角部１７ａと対応する位置に、角部１７ａに跨るように、かつ曲率中心Ｏが永久磁石１７の内部になる曲面部２０ａを有する形状に形成されている。空隙２０は、角部１７ａに跨るように形成された曲面部２０ａのｄ軸２１寄りの端部に連続してｄ軸２１と平行に延びる平面部２０ｂを備えている。   As shown in FIG. 1 (b), the rotor 14 (rotor core 15) is provided with a flux barrier (hole) 19 in a state of being continuous with the end of the permanent magnet 17 on the q-axis 22 side, and on the d-axis side. The air gap 20 is provided in a state of being continuous with the end portion. As shown in FIG. 1 (c), the gap 20 has a curvature so as to straddle the corner 17a at a position corresponding to the corner 17a on the inner peripheral side of the permanent magnet 17 near the d-axis 21 of the rotor 14. The center O is formed in a shape having a curved surface portion 20 a that becomes the inside of the permanent magnet 17. The space 20 includes a flat surface portion 20b that extends continuously in parallel to the d-axis 21 at an end portion of the curved surface portion 20a that is formed so as to straddle the corner portion 17a.

平面部２０ｂの端部は、装着孔１８に永久磁石１７の幅方向（厚方向）の中央で連続するように形成されている。なお、回転子１４には、永久磁石１７の他の角部と対応する位置にも空隙が形成されている。   The end of the flat surface portion 20 b is formed to be continuous with the mounting hole 18 at the center in the width direction (thickness direction) of the permanent magnet 17. In the rotor 14, a gap is also formed at a position corresponding to the other corner of the permanent magnet 17.

次に前記のように構成された電動機の作用を説明する。
電動機が負荷状態で駆動される場合は、固定子１１のコイル１３に電流が供給されて固定子１１に回転磁界が発生し、回転子１４に回転磁界が作用する。そして、回転磁界と永久磁石１７との間の磁気的な吸引力及び反発力により回転子１４が回転磁界と同期して回転する。 Next, the operation of the electric motor configured as described above will be described.
When the motor is driven in a load state, a current is supplied to the coil 13 of the stator 11 to generate a rotating magnetic field in the stator 11 and a rotating magnetic field acts on the rotor 14. Then, the rotor 14 rotates in synchronization with the rotating magnetic field by the magnetic attractive force and the repulsive force between the rotating magnetic field and the permanent magnet 17.

回転子１４が回転すると、永久磁石１７が装着された装着孔１８の角部（隅部）は回転子１４の回転に伴って発生する遠心力に対抗する応力の集中箇所となる。永久磁石１７がＶ字状に配置されている場合、応力集中の大きさは角部の位置によって異なる。そして、応力集中が最も大きな箇所は永久磁石１７のｑ軸側の端部で回転子１４の外周側の角部１７ｂとなり、二番目に大きな箇所は永久磁石１７のｄ軸２１側の端部で回転子１４の内周側の角部１７ａとなる。回転子１４には、外周側の角部１７ｂと対応する箇所にフラックスバリア１９が設けられており、フラックスバリア１９は応力集中を緩和する役割も果たす。   When the rotor 14 rotates, the corner portion (corner portion) of the mounting hole 18 in which the permanent magnet 17 is mounted becomes a concentrated point of stress that opposes the centrifugal force generated as the rotor 14 rotates. When the permanent magnet 17 is arrange | positioned at V shape, the magnitude | size of a stress concentration changes with the position of a corner | angular part. The location where the stress concentration is the largest is the end portion of the permanent magnet 17 on the q-axis side and the corner portion 17b on the outer peripheral side of the rotor 14, and the second largest location is the end portion of the permanent magnet 17 on the d-axis 21 side. It becomes the corner 17a on the inner peripheral side of the rotor 14. The rotor 14 is provided with a flux barrier 19 at a location corresponding to the corner 17b on the outer peripheral side, and the flux barrier 19 also plays a role of relaxing stress concentration.

一方、回転子１４には永久磁石１７のｄ軸２１側の端部に連続する状態で空隙２０が設けられているため、永久磁石１７の角部１７ａに対する応力集中が抑制される。空隙２０は曲率中心Ｏが永久磁石１７の内部になる曲面部２０ａを有する形状に形成されている。そのため、曲面部２０ａの曲率を小さくして応力集中の大きさを小さくなるようにした場合、特許文献１のように、曲面部をその曲率中心が永久磁石１７の周面または周面より若干外側になるように形成された場合に比較して、空隙２０の体積が小さくなる。空隙２０の体積が小さくなるということは、ロータコア１５を形成する電磁鋼板からプレスで除去される量が少なくなり、ロータコア１５の強度にプラスになる。その結果、電動機の高速化、即ち回転子１４の高速回転に対応することができる。   On the other hand, since the air gap 20 is provided in the rotor 14 in a state of being continuous with the end of the permanent magnet 17 on the d-axis 21 side, stress concentration on the corner 17a of the permanent magnet 17 is suppressed. The air gap 20 is formed in a shape having a curved surface portion 20 a in which the center of curvature O is inside the permanent magnet 17. Therefore, when the curvature of the curved surface portion 20a is reduced to reduce the stress concentration, the center of curvature of the curved surface portion is slightly outside the peripheral surface or the peripheral surface of the permanent magnet 17 as in Patent Document 1. Compared with the case where it forms so that it may become, the volume of the space | gap 20 becomes small. When the volume of the air gap 20 is reduced, the amount removed from the electromagnetic steel sheet forming the rotor core 15 by a press is reduced, which is positive for the strength of the rotor core 15. As a result, it is possible to cope with speeding up of the electric motor, that is, high speed rotation of the rotor 14.

この実施形態によれば、以下に示す効果を得ることができる。
（１）回転子１４の各磁極に回転子１４の内周側に向かって凸となるように複数個の永久磁石１７が埋め込まれている。永久磁石１７は、回転子１４の径方向と交差する状態で埋設され、永久磁石１７のｄ軸寄りの端部に連続する状態で空隙２０が設けられ、空隙２０は、永久磁石１７の内周側の角部１７ａに跨るように、かつ曲率中心Ｏが永久磁石１７の内部になる曲面部２０ａを有する形状に形成されている。したがって、回転子１４に回転子１４の径方向と交差する状態で埋設された永久磁石１７の回転子内周側の端部における応力集中を抑制することができるとともに、従来技術より回転子１４の強度の低減を抑制することができる。その結果、高速回転に対応することができる。また、空隙２０の形状を変更するだけで対応できるため、部品点数の増加やコストの増加はない。 According to this embodiment, the following effects can be obtained.
(1) A plurality of permanent magnets 17 are embedded in each magnetic pole of the rotor 14 so as to protrude toward the inner peripheral side of the rotor 14. The permanent magnet 17 is embedded in a state intersecting with the radial direction of the rotor 14, and a gap 20 is provided in a state of being continuous with an end portion of the permanent magnet 17 near the d-axis. The gap 20 is an inner circumference of the permanent magnet 17. It is formed in a shape having a curved surface portion 20 a that extends over the corner portion 17 a on the side and that has the center of curvature O inside the permanent magnet 17. Therefore, it is possible to suppress stress concentration at the end on the rotor inner peripheral side of the permanent magnet 17 embedded in the rotor 14 in a state intersecting with the radial direction of the rotor 14, and the rotor 14 of the conventional technique can be prevented. Reduction in strength can be suppressed. As a result, high-speed rotation can be handled. Moreover, since it can respond only by changing the shape of the space | gap 20, there is no increase in a number of parts and an increase in cost.

（２）永久磁石１７は、平板状に形成されるとともに一磁極当たり２個ずつ設けられ、かつ回転子１４の外周側に向かって拡がるＶ字状に配置され、空隙２０は回転子１４のｄ軸２１寄りで内周側の永久磁石１７の角部１７ａと対応する位置に形成されている。したがって、広く使用されるＶ字状配置の永久磁石１７を備えた回転子１４において、永久磁石１７の回転子内周側の端部における応力集中を抑制することができるとともに、従来技術より回転子１４の強度の低減を抑制することができる。   (2) The permanent magnets 17 are formed in a flat plate shape, and two permanent magnets 17 are provided for each magnetic pole, and are arranged in a V shape that expands toward the outer peripheral side of the rotor 14. Near the shaft 21, it is formed at a position corresponding to the corner 17 a of the inner peripheral permanent magnet 17. Therefore, in the rotor 14 including the V-shaped permanent magnets 17 that are widely used, stress concentration at the end of the permanent magnet 17 on the inner peripheral side of the rotor can be suppressed, and the rotor can be made more than conventional techniques. 14 can be suppressed.

（３）空隙２０は曲面部２０ａに連続するとともに、ｄ軸２１と平行に延びる平面部２０ｂを備えている。したがって、永久磁石１７から発生した磁束がｄ軸２１に対応する部分を通って固定子１１のティース１２に流れ易くなる。   (3) The air gap 20 includes a flat surface portion 20b that is continuous with the curved surface portion 20a and extends parallel to the d-axis 21. Therefore, the magnetic flux generated from the permanent magnet 17 easily flows to the teeth 12 of the stator 11 through the portion corresponding to the d-axis 21.

（４）永久磁石１７のｄ軸２１側端部は、永久磁石１７の厚さ方向の中央より回転子外周側の部分が装着孔１８に接触する。したがって、空隙２０の形状の自由度が高くなる。
（５）永久磁石１７が断面矩形の平板状に形成されているため製造が容易である。 (4) The end of the permanent magnet 17 on the d-axis 21 side is in contact with the mounting hole 18 at the outer peripheral side of the rotor from the center in the thickness direction of the permanent magnet 17. Therefore, the freedom degree of the shape of the space | gap 20 becomes high.
(5) Since the permanent magnet 17 is formed in a flat plate shape having a rectangular cross section, the manufacture is easy.

実施形態は前記に限定されるものではなく、例えば、次のように具体化してもよい。
○ 回転子１４の各磁極に回転子１４の内周側に向かって凸となるように複数個の永久磁石１７が埋め込まれ、回転子１４の径方向と交差する状態で埋設された永久磁石１７が存在する配置であれば、永久磁石１７の配置はＶ字状に限らない。例えば、図２に示すように、平板状に形成されるとともに厚さ方向に着磁された永久磁石１７が、各磁極に３個ずつ、３個の永久磁石１７全体として回転子１４の内周側が凸となる状態で設けてもよい。そして、３個の永久磁石１７のうち、回転子１４の径方向と交差する状態で埋設された永久磁石１７のｄ軸寄りの端部に連続する状態で空隙２０が設けられ、空隙２０は、永久磁石１７の内周側の角部１７ａに跨るように、かつ曲率中心が永久磁石１７の内部になる曲面部２０ａを有する形状に形成される。 The embodiment is not limited to the above, and may be embodied as follows, for example.
A plurality of permanent magnets 17 are embedded in each magnetic pole of the rotor 14 so as to protrude toward the inner peripheral side of the rotor 14, and the permanent magnets 17 are embedded so as to intersect the radial direction of the rotor 14. If the arrangement is present, the arrangement of the permanent magnets 17 is not limited to the V shape. For example, as shown in FIG. 2, three permanent magnets 17 that are formed in a flat plate shape and are magnetized in the thickness direction have three inner permanent magnets 17 as a whole. You may provide in the state from which a side becomes convex. And among the three permanent magnets 17, the air gap 20 is provided in a state continuous with the end portion near the d axis of the permanent magnet 17 embedded in a state intersecting with the radial direction of the rotor 14. The permanent magnet 17 is formed in a shape having a curved surface portion 20 a that spans the corner portion 17 a on the inner peripheral side of the permanent magnet 17 and has a center of curvature inside the permanent magnet 17.

○ 空隙２０は、平面部２０ｂが存在せず、永久磁石１７の内周側の角部１７ａに跨るように、かつ曲率中心が永久磁石１７の内部になる曲面部２０ａのみでロータコア１５と区画された形状としてもよい。   The air gap 20 is partitioned from the rotor core 15 only by the curved surface portion 20a that does not have the flat surface portion 20b and extends over the corner portion 17a on the inner peripheral side of the permanent magnet 17 and whose curvature center is inside the permanent magnet 17. It may be a different shape.

○ 空隙２０が永久磁石１７のｄ軸２１側端部と接触する部分は、永久磁石１７の厚さ方向の中央より回転子外周側に限らない。
○ コイル１３の巻き付け方法は分布巻に限らず、集中巻であってもよい。図２の場合は集中巻の例である。 The portion where the gap 20 contacts the end of the permanent magnet 17 on the d-axis 21 side is not limited to the rotor outer peripheral side from the center in the thickness direction of the permanent magnet 17.
The winding method of the coil 13 is not limited to distributed winding, and concentrated winding may be used. The case of FIG. 2 is an example of concentrated winding.

○ 電動機の極数は８極に限らず偶数極であればよいが、４極以上が好ましい。
○ 電動機に限らず発電機に適用してもよい。 ○ The number of poles of the electric motor is not limited to eight but may be an even number, but four or more are preferred.
○ It may be applied not only to motors but also to generators.

（ａ）は一実施形態の回転子と固定子の関係を示す部分模式図、（ｂ）は（ａ）の部分拡大図、（ｃ）は（ｂ）の部分拡大図。(A) is the partial schematic diagram which shows the relationship between the rotor of one Embodiment, and a stator, (b) is the elements on larger scale of (a), (c) is the elements on larger scale of (b). 別の実施形態の回転子を示す部分模式図The partial schematic diagram which shows the rotor of another embodiment （ａ），（ｂ）は従来技術の回転子の磁石用溝の模式図。(A), (b) is a schematic diagram of the groove | channel for magnets of the rotor of a prior art.

符号の説明Explanation of symbols

Ｏ…曲率中心、１４…回転子、１７…永久磁石、１７ａ…角部、２０…空隙、２０ａ…曲面部、２１…ｄ軸。   O ... center of curvature, 14 ... rotor, 17 ... permanent magnet, 17a ... corner, 20 ... air gap, 20a ... curved surface, 21 ... d-axis.

Claims (3)

回転子の各磁極に回転子の内周側に向かって凸となるように複数個の永久磁石が埋め込まれた回転電機の回転子であって、
前記永久磁石のうち、回転子の径方向と交差する状態で埋設された永久磁石のｄ軸寄りの端部に連続する状態で空隙が設けられ、前記空隙は、前記永久磁石の内周側の角部に跨るように、かつ曲率中心が前記永久磁石の内部になる曲面部を有する形状に形成されていることを特徴とする回転電機の回転子。 A rotor of a rotating electrical machine in which a plurality of permanent magnets are embedded in each magnetic pole of the rotor so as to protrude toward the inner peripheral side of the rotor,
Among the permanent magnets, a gap is provided in a state of being continuous with an end near the d axis of a permanent magnet embedded in a state intersecting with the radial direction of the rotor, and the gap is provided on the inner peripheral side of the permanent magnet. A rotor of a rotating electrical machine, wherein the rotor is formed in a shape having a curved surface portion that extends over a corner portion and has a center of curvature inside the permanent magnet. 前記永久磁石は、平板状に形成されるとともに一磁極当たり２個ずつ設けられ、かつ回転子の外周側に向かって拡がるＶ字状に配置されている請求項１に記載の回転電機の回転子。   2. The rotor of a rotating electrical machine according to claim 1, wherein the permanent magnets are formed in a flat plate shape, two are provided per magnetic pole, and are arranged in a V shape that expands toward the outer peripheral side of the rotor. . 請求項１又は請求項２に記載の回転子を備えた回転電機。   A rotating electrical machine comprising the rotor according to claim 1.
JP2007047663A 2007-02-27 2007-02-27 Rotating electrical machine and rotator therefor Pending JP2008211934A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007047663A JP2008211934A (en) 2007-02-27 2007-02-27 Rotating electrical machine and rotator therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007047663A JP2008211934A (en) 2007-02-27 2007-02-27 Rotating electrical machine and rotator therefor

Publications (1)

Publication Number Publication Date
JP2008211934A true JP2008211934A (en) 2008-09-11

Family

ID=39787764

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007047663A Pending JP2008211934A (en) 2007-02-27 2007-02-27 Rotating electrical machine and rotator therefor

Country Status (1)

Country Link
JP (1) JP2008211934A (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010081754A (en) * 2008-09-26 2010-04-08 Fuji Electric Systems Co Ltd Permanent magnet rotary machine
JP2010178535A (en) * 2009-01-30 2010-08-12 Toshiba Industrial Products Manufacturing Corp Rotor of permanent magnet type rotary electric machine and the rotary electric machine
JP2012186889A (en) * 2011-03-03 2012-09-27 Nippon Soken Inc Rotary electric machine
WO2013051617A1 (en) * 2011-10-04 2013-04-11 日立オートモティブシステムズ株式会社 Permanent magnet type rotating electrical machine and vehicle equipped with permanent magnet type rotating electrical machine
JP2013128384A (en) * 2011-11-14 2013-06-27 Fanuc Ltd Rotor of permanent magnet synchronous motor, motor and machine tool
JP2014060836A (en) * 2012-09-14 2014-04-03 Denso Corp Rotor of rotary electric machine
JP2014064471A (en) * 2014-01-17 2014-04-10 Nippon Soken Inc Rotary electric machine
US8766503B2 (en) 2011-03-28 2014-07-01 Kabushiki Kaisha Toyota Jidoshokki Permanent magnet embedded rotor for rotating electric machine and rotating electric machine
WO2014156678A1 (en) * 2013-03-29 2014-10-02 株式会社小松製作所 Electric motor
WO2014178227A1 (en) * 2013-05-01 2014-11-06 日立オートモティブシステムズ株式会社 Rotary electrical machine, and rotor for rotary electrical machine
CN104210263A (en) * 2014-09-17 2014-12-17 长春猛固门业有限公司 Door leaf pattern forming method and door leaf pattern forming system
JP2015511114A (en) * 2012-03-20 2015-04-13 コルモーゲン コーポレーションＫｏｌｌｍｏｒｇｅｎ Ｃｏｒｐｏｒａｔｉｏｎ Cantilever rotor magnet support
US9780612B2 (en) 2014-03-18 2017-10-03 Nissan Motor Co., Ltd. Rotor structure for electric rotating machine
WO2021039930A1 (en) * 2019-08-28 2021-03-04 日本電産株式会社 Rotor, motor, and drive device

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010081754A (en) * 2008-09-26 2010-04-08 Fuji Electric Systems Co Ltd Permanent magnet rotary machine
JP2010178535A (en) * 2009-01-30 2010-08-12 Toshiba Industrial Products Manufacturing Corp Rotor of permanent magnet type rotary electric machine and the rotary electric machine
JP2012186889A (en) * 2011-03-03 2012-09-27 Nippon Soken Inc Rotary electric machine
US8957560B2 (en) 2011-03-03 2015-02-17 Denso Corporation Electric rotating machine
US8766503B2 (en) 2011-03-28 2014-07-01 Kabushiki Kaisha Toyota Jidoshokki Permanent magnet embedded rotor for rotating electric machine and rotating electric machine
WO2013051617A1 (en) * 2011-10-04 2013-04-11 日立オートモティブシステムズ株式会社 Permanent magnet type rotating electrical machine and vehicle equipped with permanent magnet type rotating electrical machine
JP2013081302A (en) * 2011-10-04 2013-05-02 Hitachi Automotive Systems Ltd Permanent magnet type rotary electric machine and vehicle having the same
CN103858318A (en) * 2011-10-04 2014-06-11 日立汽车***株式会社 Permanent magnet type rotating electrical machine and vehicle equipped with permanent magnet type rotating electrical machine
JP2013128384A (en) * 2011-11-14 2013-06-27 Fanuc Ltd Rotor of permanent magnet synchronous motor, motor and machine tool
JP2015511114A (en) * 2012-03-20 2015-04-13 コルモーゲン コーポレーションＫｏｌｌｍｏｒｇｅｎ Ｃｏｒｐｏｒａｔｉｏｎ Cantilever rotor magnet support
JP2014060836A (en) * 2012-09-14 2014-04-03 Denso Corp Rotor of rotary electric machine
WO2014156678A1 (en) * 2013-03-29 2014-10-02 株式会社小松製作所 Electric motor
JP2014197971A (en) * 2013-03-29 2014-10-16 株式会社小松製作所 Motor
WO2014178227A1 (en) * 2013-05-01 2014-11-06 日立オートモティブシステムズ株式会社 Rotary electrical machine, and rotor for rotary electrical machine
EP2993761A4 (en) * 2013-05-01 2016-12-28 Hitachi Automotive Systems Ltd Rotary electrical machine, and rotor for rotary electrical machine
JPWO2014178227A1 (en) * 2013-05-01 2017-02-23 日立オートモティブシステムズ株式会社 Rotating electric machine and rotating electric machine rotor
US10511198B2 (en) 2013-05-01 2019-12-17 Hitachi Automotive Systems, Ltd. Rotary electrical machine, and rotor for rotary electrical machine
JP2014064471A (en) * 2014-01-17 2014-04-10 Nippon Soken Inc Rotary electric machine
US9780612B2 (en) 2014-03-18 2017-10-03 Nissan Motor Co., Ltd. Rotor structure for electric rotating machine
CN104210263A (en) * 2014-09-17 2014-12-17 长春猛固门业有限公司 Door leaf pattern forming method and door leaf pattern forming system
WO2021039930A1 (en) * 2019-08-28 2021-03-04 日本電産株式会社 Rotor, motor, and drive device

Similar Documents

Publication Publication Date Title
JP2008211934A (en) Rotating electrical machine and rotator therefor
JP5709907B2 (en) Permanent magnet embedded rotary electric machine for vehicles
JP5774081B2 (en) Rotating electric machine
JP2008206308A (en) Permanent-magnet rotating electric machine
JP5228316B2 (en) Rotating electric machine rotor and rotating electric machine
JP5208088B2 (en) Permanent magnet embedded motor and blower
JP5813254B2 (en) Permanent magnet rotating electric machine
JP2007104819A (en) Rotating electric machine
JP2006509483A (en) Electric machines, especially brushless synchronous motors
JP5313752B2 (en) Brushless motor
US20140062254A1 (en) Permanent Magnet Rotating Electrical Machine
JP2009131070A (en) Magnet type synchronous machine
JP2007068357A (en) Rotor of rotary electric machine and rotary electric machine using the same
JP2010178535A (en) Rotor of permanent magnet type rotary electric machine and the rotary electric machine
JP2008271652A (en) Permanent magnet type rotary electric machine
JP2010158130A (en) Permanent magnet type rotating electric machine and elevator device using the same
JP5602815B2 (en) Rotor having a protrusion for positioning a permanent magnet and electric motor comprising such a rotor
JP2003284276A (en) Dynamo-electric machine
JP2018057155A (en) Rotator of rotating electrical machine
JP2009219312A (en) Rotating electric machine and spindle unit using same
JP4855747B2 (en) Permanent magnet type reluctance rotating electric machine
JP2006333656A (en) Rotor of rotary electric machine and rotary electric machine using same
JPH0833246A (en) Rotor for permanent magnet synchronous electric rotating machine
JP2000316241A (en) Motor with embedded permanent magnet
JP6485205B2 (en) Rotating electric machine