JP2008278591A - Rotor of rotating electric machine and rotating electric machine - Google Patents

Rotor of rotating electric machine and rotating electric machine Download PDF

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JP2008278591A
JP2008278591A JP2007117199A JP2007117199A JP2008278591A JP 2008278591 A JP2008278591 A JP 2008278591A JP 2007117199 A JP2007117199 A JP 2007117199A JP 2007117199 A JP2007117199 A JP 2007117199A JP 2008278591 A JP2008278591 A JP 2008278591A
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rotor
axis
electric machine
rotor core
gt
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JP5288724B2 (en )
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Takashi Hanai
Takao Hirano
Wataru Ito
Masakatsu Matsubara
Sukeyasu Mochizuki
伊藤  渉
恭男 平野
資康 望月
正克 松原
隆 花井
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Toshiba Corp
Toshiba Industrial Products Manufacturing Corp
東芝産業機器製造株式会社
株式会社東芝
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/64Electric machine technologies for applications in electromobilty
    • Y02T10/641Electric machine technologies for applications in electromobilty characterised by aspects of the electric machine

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotor of a rotating electric machine which enhances efficiency by reducing torque ripple, iron loss and higher harmonics and suppress generation of resistance due to rotation of the rotor, and to provide a rotating electric machine. <P>SOLUTION: The rotor of a rotating electric machine comprises a rotor core 11, a plurality of magnet insertion holes 13 provided in the outer circumferential part of the rotor core 11 at constant intervals in the circumferential direction, permanent magnets 14 for magnetic pole formation inserted into the respective magnet insertion holes 13 and an outer circumferential hole 19 provided in the outer circumferential part of the rotor core 11. The outer circumferential hole 19 in the circumferential direction of the rotor core 11 ranges from a position of a predetermined angle for the d axis (electrical angle ϕ<SB>1</SB>for the d axis) to a position of a predetermined angle for the d axis (electrical angle ϕ<SB>2</SB>for the d axis), i.e., near the chip portion 18 existing on the side separating from the d axis (q axis side). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、磁極として永久磁石を備えた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 and the rotary electric machine of the rotary electric machine having a permanent magnet as the magnetic pole.

一般に、電気自動車やハイブリット車などの車両用モータのように使用電圧が高いところで使用される回転電機には、トルクリプル、鉄損及び高調波の低減が求められている。 Generally, the rotary electric machine working voltage is used at a high place as vehicle motor such as electric vehicles and hybrid vehicles, torque ripple, reduction of iron loss and harmonic are desired. そのため、回転子鉄心の外周部に外周溝部を形成した回転電機の回転子が考えられている(例えば、特許文献1参照)。 Therefore, the rotor of the rotary electric machine is considered forming the outer peripheral groove in the outer peripheral portion of the rotor core (e.g., see Patent Document 1).

図5には、従来の回転子を構成する回転子鉄心101の外周部の一部が示されている。 FIG. 5 is a part of the outer peripheral portion of the rotor core 101 constituting the conventional rotor shown. 回転子鉄心101は、円環状の多数の珪素鋼板を積層して構成されている。 The rotor core 101 is formed by laminating many silicon steel annular. 回転子鉄心101の外周部には、外周に向かうに従って対向距離が順次大となる一対の磁石挿入孔部102,102が複数対、周方向に一定の間隔を存して設けられている(図5では一対図示)。 The outer periphery of the rotor core 101, a pair of magnet insertion holes 102, 102 which are opposing distance becomes sequentially larger is provided to exist a certain distance pairs, circumferentially toward the outer periphery (Fig. In 5 pair shown). この場合、一対の磁石挿入孔部102,102は、外周側からみてハ字形になっている。 In this case, a pair of magnet insertion holes 102, 102 is adapted to c-shaped when viewed from the outer peripheral side.

これらの磁石挿入孔部102には、磁極形成用の永久磁石103が夫々挿入固定され、これにより、磁石挿入孔部102の両端部に逃げ孔部104,105が形成される。 These magnet insertion hole 102, the permanent magnet 103 of the magnetic pole forming is respectively inserted and fixed, thereby, the hole portion 104, 105 escapes to the opposite ends of the magnet insertion hole 102 is formed. ここで、逃げ孔部104は、一対の永久磁石103,103間(磁極)の中心部分、即ち、固定子鉄心(図示せず)側で生じる磁束の通り難い部分のd軸に近い側に位置し、逃げ孔部105は、外周側に位置する。 Here, escape hole 104, the central portion between the pair of permanent magnets 103, 103 (poles), i.e., positioned closer to the d-axis as hard portions of magnetic flux generated by the stator core (not shown) side and escape holes 105, positioned on the outer peripheral side. 又、近接する逃げ孔部104,104間にブリッジ部106が必然的に形成され、磁石挿入孔部102の逃げ孔部105の端部と回転子鉄心101の外周との間にチップ部107が必然的に形成される。 Further, the bridge portion 106 is inevitably formed between the relief holes 104, 104 adjacent the tip portion 107 between the outer end and the rotor core 101 of the relief hole 105 of the magnet insertion hole 102 It is inevitably formed. 尚、図示はしないが、d軸と周方向に隣合うd軸との間にあって、固定子鉄心側で生じた磁束が通り易い部分をq軸とする。 Although not shown, located between the d-axis adjacent to the d-axis and the circumferential direction, the easy part as the magnetic flux generated in the stator core side and the q-axis.

ここで、回転子鉄心101の外周部には、永久磁石103に対応して外周溝部108が形成されている。 Here, the outer peripheral portion of the rotor core 101, outer peripheral groove 108 in correspondence to the permanent magnet 103 is formed. この外周溝部108の底部の範囲は、所定の角度(d軸に対して電気角φ )を存する位置から、所定の角度(d軸に対して電気角φ )を存する位置までである。 Range of the bottom of the outer peripheral groove 108 is from a lie position (electrical angle phi 1 relative to the d-axis) a predetermined angular position until that exist (electrical angle phi 2 with respect to d-axis) a predetermined angle. 電気角φ に溝があると、トルクリプル及び鉄損の低減が可能になり、電気角φ に溝があると、永久磁石103の磁束の立上がりが制限され、高調波の低減が可能になる。 When the electrical angle phi 1 has a notch, allows reduction of the torque ripple and iron loss, when the electrical angle phi 2 has a notch, the rise of the magnetic flux of the permanent magnet 103 is limited, it is possible to reduce the harmonic . 電気角φ は、例えば、d軸より離れる方向側(q軸側)に存するチップ部107近傍(q軸に最も近い永久磁石103の短尺の端面103aの延長線と回転子鉄心101の外周と交差する位置)と回転子鉄心101の中心とを結ぶ直線と、d軸とのなす角である。 Electrical angle phi 2 is, for example, the outer peripheral direction side short of the end face 103a of the extension and the rotor core 101 of the chip 107 near (closest permanent magnets to the q-axis 103 existing in the (q-axis side) away from the d-axis intersecting position) and a straight line connecting the center of the rotor core 101, an angle between the d-axis.
特開2004−328956号公報 JP 2004-328956 JP

回転子鉄心101の外周部に外周溝部108が形成されている回転子が回転すると、外周溝部108で空気抵抗が増加して損失となり、効率が悪くなる虞がある。 When the rotor outer peripheral groove 108 in the outer peripheral portion of the rotor core 101 is formed is rotated, the air resistance becomes a loss increases in the outer peripheral groove 108, there is a possibility that the efficiency is deteriorated.
又、電気自動車やハイブリット車などの車両用モータとして使用される回転電機は、回転子や固定子の摩耗や発熱を防ぐために、潤滑油や冷却油に一部が浸漬されることがある。 The rotary electric machine is used as a vehicle motor such as electric vehicles and hybrid vehicles, in order to prevent wear and heating of the rotor and the stator, there is a part is immersed in the lubricating oil and cooling oil. この場合、回転子鉄心101の外周部に外周溝部108が形成されていると、この外周溝部108によって潤滑油や冷却油等が攪拌される。 In this case, the outer peripheral groove 108 is formed on the outer periphery of the rotor core 101, lubricating oil and cooling oil or the like is agitated by the outer peripheral groove 108. そのため、潤滑油や冷却油等が抵抗となり、損失が増加して効率が悪くなる。 Therefore, lubricating oil and cooling oil or the like becomes resistance, less efficient loss is increased.

本発明は、上記の事情に鑑みてなされたものであり、その目的は、トルクリプル、鉄損及び高調波の低減ができ、且つ、回転子の回転による抵抗の発生を抑制できて、効率の向上を図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である。 The present invention has been made in view of the above circumstances, and its object is torque ripple can be reduced in iron loss and harmonic, and, can be suppressed the occurrence of resistance due to the rotation of the rotor, the improvement of efficiency the invention is to provide a rotor and the rotary electric machine of the rotary electric machine can be achieved.

本発明の回転電機の回転子は、回転子鉄心と、この回転子鉄心の外周部に周方向に一定の間隔を存して設けられた複数の磁石挿入孔部と、これらの磁石挿入孔部に夫々挿入固定された磁極形成用の永久磁石と、前記回転子鉄心の外周部に設けられ、前記磁極の中心に対する所定の角度位置から前記中心より離れる方向側の所定の角度位置までの範囲にわたる外周孔部とを具備してなることを特徴としている(請求項1の発明)。 The rotor of the rotating electric machine of the present invention includes a rotor core, a plurality of magnet insertion hole provided to exist certain intervals in the circumferential direction on the outer peripheral portion of the rotor core, these magnet insertion hole a permanent magnet for each inserted fixed magnetic poles formed, provided on an outer peripheral portion of the rotor core, ranging from a predetermined angular position relative to the center of the magnetic pole to a predetermined angular position in direction away from the central is characterized by comprising comprises an outer peripheral holes (the first aspect of the present invention).

又、本発明の回転電機は、固定子鉄心と、この固定子鉄心に着装されたコイルと、請求項1又は2に記載の回転子とを具備したことを特徴としている(請求項3の発明)。 Further, the rotating electrical machine of the present invention includes a stator core, a coil this is worn on the stator core, it is characterized by comprising a rotor as claimed in claim 1 or 2 (the invention of claim 3 ).

本発明によれば、回転子鉄心の外周部に、磁極の中心に対する所定の角度位置から中心より離れる方向側の所定の角度位置までの範囲にわたる外周孔部を設けたので、外周孔部でトルクリプル、鉄損及び高調波の低減が可能になる。 According to the present invention, the outer periphery of the rotor core, is provided with the outer peripheral holes ranging up to a predetermined angular position in direction away from the center of a predetermined angular position relative to the center of the magnetic pole, the outer peripheral holes torque ripple allows reduction of the iron loss and harmonic.
そして、外周孔部は、従来の外周溝部とは異なり、回転子鉄心の外周面に位置しないので、回転子鉄心の外周で空気、潤滑油或いは冷却油を攪拌することは無く、損失の発生を抑制できて、効率の向上を図ることができる。 Then, the outer peripheral holes, unlike the conventional outer circumferential groove and does not positioned on the outer peripheral surface of the rotor core, the outer periphery of the rotor core air, it is not to stir the lubricating oil or cooling oil, the occurrence of loss it can be suppressed, thereby improving the efficiency.

以下、本発明を電気自動車、ハイブリット車等の車両に搭載された車両用回転電機に適用した第1の実施形態を、図1及び図2を参照して説明する。 Hereinafter, an electric vehicle of the present invention, the first embodiment applied to a vehicle rotary electric machine mounted on a vehicle of a hybrid vehicle or the like, will be described with reference to FIGS.
図2に本実施形態に係る回転電機1の固定子2及び固定子2の内周側に位置する回転子3の概略構成を示す。 It shows a schematic configuration of the rotor 3 positioned on the inner peripheral side of the stator 2 and the stator 2 of the rotary electric machine 1 according to this embodiment in FIG.
固定子2は、固定子鉄心4に、複数相、例えば三相コイルたるU相コイル5、V相コイル6、W相コイル7が着装されて構成される。 The stator 2, the stator core 4 and a plurality of phases, for example, a three-phase coil serving U-phase coil 5, V-phase coil 6, W-phase coil 7 is worn.

固定子鉄心4は、複数枚の鋼板が積層されて一体的に結着されて形成された円環形状をなしている。 The stator core 4 has a plurality steel plates are laminated of annular shape formed integrally bound. そして、固定子鉄心4の内周面には、各相のコイル5,6,7を配設させるためのスロット8が複数個所、例えば48箇所に形成されている。 Then, the inner peripheral surface of the stator core 4, a slot 8 for disposing the coils of each phase 5, 6 and 7 are formed at a plurality of locations, for example, 48 locations.
回転子3は、円環状の多数の珪素鋼板を積層してなる回転子鉄心11と、回転子鉄心11の内部に設けたれた回転軸12を有している。 The rotor 3 includes a rotor core 11 formed by laminating many silicon steel annular rotating shaft 12 hung provided inside the rotor core 11.

図1には、回転子鉄心11の外周部の一部が示されている。 FIG. 1 shows a portion of the outer peripheral portion of the rotor core 11.
回転子鉄心11の外周部には、外周に向かうに従って対向距離が順次大となる一対の磁石挿入孔部13,13が複数対、例えば八対、周方向に一定の間隔を存して設けられている(図1では一対図示)。 The outer periphery of the rotor core 11, a pair of magnet insertion holes 13, 13 are opposing distance becomes sequentially larger multiple pairs, e.g. eight pairs, provided exist certain intervals in the circumferential direction towards the outer periphery and have (in FIG. 1 pair shown). この場合、一対の磁石挿入孔部13,13は、外周側からみてハ字形になっている。 In this case, a pair of magnet insertion holes 13, 13 is made into a high-shape when viewed from the outer peripheral side.

これらの磁石挿入孔部13には、磁極形成用の永久磁石14が夫々挿入固定され、これにより、磁石挿入孔部13の両端部に逃げ孔部15,16が形成される。 These magnet insertion hole 13, the permanent magnets 14 of the magnetic pole forming is respectively inserted and fixed, thereby, the hole portions 15 and 16 escape to opposite ends of the magnet insertion holes 13 are formed. ここで、逃げ孔部15は、一対の永久磁石14,14間(磁極)の中心部分、即ち、固定子鉄心4側で生じた磁束が通り難い部分のd軸に近い側に位置し、逃げ孔部16は、外周側に位置する。 Here, relief holes 15, the central portion between the pair of permanent magnets 14, 14 (magnetic pole), i.e., located closer to the d-axis of the portion difficult as the magnetic flux generated in the stator core 4 side, relief hole 16 is positioned on the outer peripheral side. この場合、近接する逃げ孔部15,15間にブリッジ部17が必然的に形成され、逃げ孔部16と回転子鉄心11の外周との間にチップ部18が必然的に形成される。 In this case, the bridge portion 17 between relief holes 15, 15 adjacent is inevitably formed, tip portions 18 are inevitably formed between the outer circumference of the relief hole 16 and the rotor core 11. チップ部18の厚さ寸法(逃げ孔部16から回転子鉄心11の外周部までの最短の長さ)は、回転子3の回転によって永久磁石14による遠心力を受けても破損しない強度を有し、且つ、永久磁石14の端部の磁束漏洩が大きくならないように設定されている。 Thickness dimension of the tip portion 18 (the length of the shortest from relief hole 16 to the outer periphery of the rotor core 11), have a strength which is not damaged even when subjected to centrifugal force by the permanent magnet 14 by the rotation of the rotor 3 and, and, and is set as the magnetic flux leakage of the end portion of the permanent magnet 14 is not increased.
尚、d軸と周方向に隣合うd軸との間にあって、固定子鉄心4側で生じる磁束の通り易い部分をq軸(図2参照)とする。 Incidentally, in the between the d-axis adjacent to the d-axis and the circumferential direction, the street tends portion of magnetic flux generated by the stator core 4 side and the q-axis (see FIG. 2).

ここで、回転子鉄心11の一対の永久磁石14,14間の外周部には、永久磁石14に対応して外周孔部19が形成されている。 Here, the outer peripheral portion between the pair of permanent magnets 14, 14 of the rotor core 11, the outer peripheral holes 19 in correspondence with the permanent magnet 14 is formed. 外周孔部19の、回転子鉄心11の周方向の範囲は、d軸に対する所定の角度(d軸に対して電気角φ )を存する位置から、d軸に対する所定の角度(d軸に対して電気角φ )を存する位置まで、即ち、d軸より離れる方向側(q軸側)に存するチップ部18近傍までである。 The outer peripheral holes 19, the circumferential range of the rotor core 11, from the position exists (electrical angle phi 1 relative to the d-axis) a predetermined angle with respect to the d-axis, for a given angle (d-axis with respect to the d-axis Te to a position exists an electrical angle phi 2), that is, to the vicinity tip portion 18 that exists in the direction away from the d-axis (q-axis side). 電気角φ に孔があると、トルクリプル及び鉄損の低減が可能になり、電気角φ に孔があると、永久磁石103の磁束の立上がりが制限され、高調波の低減が可能になる。 When the electrical angle phi 1 is the hole, it becomes possible to reduce the torque ripple and iron loss, when the electrical angle phi 2 is the hole, the rise of the magnetic flux of the permanent magnet 103 is limited, it is possible to reduce the harmonic . この場合、電気角φ は、例えば、q軸側に存するチップ部18近傍(例えば、外周孔部19のq軸側の円弧端部のうちの、回転子鉄心11の外周側の端部)と回転子鉄心11の中心とを結ぶ直線と、d軸とのなす角である。 In this case, the electrical angle phi 2 is, for example, near the tip portion 18 that exists on the q-axis side (e.g., of the arc end of the q-axis side of the outer peripheral hole 19, the end on the outer side of the rotor core 11) and the straight line connecting the center of the rotor core 11 as a angle between the d-axis. 又、外周孔部19の、回転子鉄心11の径方向に対向して位置する二辺は、略平行の関係である。 Further, the outer peripheral holes 19, two sides located opposite in the radial direction of the rotor core 11 is substantially parallel relationship.

次に、回転子3の作用及び効果について説明する。 Next, a description will be given of the operation and effect of the rotor 3.
上記構成の回転子3には、磁束の通り難い部分のd軸と、磁束の通り易い部分のq軸とが形成される(所謂磁気的凹凸が形成される)ので、これらd軸及びq軸と、固定子2との空隙部分で、固定子2に着装されたコイル5,6,7に電流を流すことにより蓄えられる磁気エネルギーが異なり、この磁気エネルギーの変化によりトルクが発生する。 The rotor 3 of the above structure, the d-axis as hard portion of the magnetic flux, since the q-axis are formed as easily portion of the magnetic flux (so-called magnetic unevenness is formed), these d-axis and q-axis When, in the gap portion between the stator 2, unlike the magnetic energy stored by supplying a current to the coils 5, 6, 7, which is worn on the stator 2, torque is generated by a change in the magnetic energy. 又、回転子3の回転子鉄心11には、永久磁石14が設けられているので、永久磁石14と固定子2の磁極との間の磁気吸引力及び磁気反発力によってもトルクは発生する。 Further, the rotor core 11 of the rotor 3, since the permanent magnets 14 are provided, the torque is generated by the magnetic attraction force and the magnetic repulsive force between the magnetic poles of the permanent magnets 14 and the stator 2. これにより、回転子3が回転するようになる。 Thus, so the rotor 3 is rotated.

このような本実施形態によれば、回転子鉄心11の外周部に、電気角φ から電気角φ の位置までの範囲にわたる外周孔部19を設けたので、外周孔部19でトルクリプル、鉄損及び高調波の低減が可能になる。 According to the present embodiment, the outer periphery of the rotor core 11, since the outer peripheral hole 19 ranging from the electrical angle phi 1 to the position of the electrical angle phi 2 is provided, the torque ripple at the outer hole portion 19, reduction of iron loss and harmonic becomes possible.
そして、外周孔部19は、従来の外周溝部108とは異なり、回転子鉄心11の外周面には位置していないので、回転子3が回転しても、例えば空気抵抗は少なく、損失の発生を抑制できて、効率の向上を図ることができる。 Then, the outer peripheral holes 19, unlike the conventional outer peripheral groove 108, since the outer peripheral surface of the rotor core 11 are not located, even if the rotating rotor 3, for example, air resistance is small, the losses it can be can be suppressed, thereby improving efficiency.

特に、回転子3の一部が、潤滑油、冷却油等の液体に浸漬される場合、従来では外周溝部108が液体を攪拌することになって、回転子の抵抗が著しく大きくなり、損失が増大するが、本実施形態では、外周孔部19が液体を攪拌することは無く、或いは、攪拌してもそれほどでも無く、従って、損失の発生を著しく抑制することができて、効率の向上を一層図ることができる。 In particular, a portion of the rotor 3, the lubricating oil, when immersed in the liquid of the cooling oil, etc., in the conventional become the outer peripheral groove 108 for stirring the liquid, the resistance of the rotor becomes extremely large, loss but increasing, in this embodiment, it is not the outer peripheral holes 19 for stirring the liquid, or without even so be stirred, thus, able to significantly suppress the occurrence of loss, an improvement in efficiency it is possible to achieve even more.

次に、本発明の第2の実施形態の回転子を、図3を参照して説明する。 Then, the rotor of the second embodiment of the present invention will be described with reference to FIG. 尚、上記第1の実施形態と同様な一部分には同符号を付し、その詳細な説明は省略する。 The above given the same reference numerals in the first same part as the embodiment of, a detailed description thereof will be omitted.
図3には、本発明の第2の実施形態の回転子を構成する回転子鉄心21の一部が示されている。 FIG. 3 shows a portion of the rotor core 21 constituting the rotor of the second embodiment of the present invention. 回転子鉄心21の外周面には、第1の実施形態の回転子鉄心11の形状と同様に、溝部が形成されていない。 The outer peripheral surface of the rotor core 21, similar to the shape of the rotor core 11 of the first embodiment, is not formed groove.

ここで、回転子鉄心21の永久磁石14より外周側の外周部には、第1の実施形態の回転子鉄心11と同様に、永久磁石14に対応して外周孔部22が形成されている。 Here, the outer peripheral portion of the outer peripheral side of the permanent magnets 14 of the rotor core 21, similarly to the rotor core 11 of the first embodiment, the outer peripheral hole 22 in correspondence to the permanent magnet 14 is formed . そして、第2の実施形態の外周孔部22は、複数個の孔、例えば3個の孔22a,22b,22cで構成され、これら孔22a,22b,22cは、回転子鉄心21の同心円上に位置している。 Then, the outer peripheral hole 22 of the second embodiment, a plurality of holes, for example, three holes 22a, 22b, is configured by 22c, these holes 22a, 22b, 22c are concentrically of the rotor core 21 positioned. 孔22aは、d軸に対する所定の角度(d軸に対して電気角φ )を存する位置に設けられている。 Hole 22a is provided in a predetermined angular position exists and (d electrical angle phi 1 relative to axis) with respect to the d-axis. 孔22cは、d軸に対する所定の角度(d軸に対して電気角φ )を存する位置、即ち、d軸より離れる方向側(q軸側)に存するチップ部18近傍に設けられている。 Hole 22c is a position which is away (electrical angle phi 2 with respect to d-axis) a predetermined angle with respect to the d-axis, i.e., are provided to the tip portion 18 near existing in direction (q-axis side) away from the d-axis. 孔22bは、孔22aと孔22cとの中間に設けられている。 Hole 22b is provided intermediate the hole 22a and the hole 22c.

孔22a,22b,22cは、d軸から離れる方向に向かうに従って、孔の形状が周方向に長く形成されており、孔22a,22b,22cのうちでは、孔22cが最も周方向に長い形状をなしている。 Holes 22a, 22b, Nishitagatte 22c is directed in a direction away from the d-axis, are elongated shape of hole in the circumferential direction, the holes 22a, 22b, Among 22c, a long shape in the most circumferential direction hole 22c forms. 尚、この場合、孔22cのd軸から最も離れた端部付近(例えば、外周孔部22のq軸側の円弧端部のうちの、回転子鉄心21の外周側の端部)に電気角φ がある。 In this case, near the end furthest from the d-axis of the hole 22c (e.g., of the arc end of the q-axis side of the outer peripheral hole 22, the end on the outer side of the rotor core 21) electrical angle there is a φ 2.
外周孔部22において、回転子鉄心21の径方向に対向して位置する二辺は、略平行の関係である。 In the outer peripheral holes 22, two sides located opposite in the radial direction of the rotor core 21 is substantially parallel relationship.

第2の実施形態の回転子においても、第1の実施形態の回転子と同様の作用効果を奏する。 Also in the rotor of the second embodiment, the same effects as the rotor of the first embodiment. 又、外周孔部22の孔22a,22b,22cを、d軸から離れる方向に向かうに従って、孔の形状が周方向に長く形成したので、永久磁石14の磁束の立上がりを滑らかにすることができる。 Further, the hole 22a of the outer hole portion 22, 22b, a 22c, toward the direction away from the d-axis, the shape of the holes is elongated in the circumferential direction, it is possible to smooth the rise of the magnetic flux of the permanent magnet 14 .

次に、本発明の第3の実施形態の回転子を、図4を参照して説明する。 Then, the rotor of the third embodiment of the present invention will be described with reference to FIG. 尚、上記第1の実施形態と同様な一部分には同符号を付し、その詳細な説明は省略する。 The above given the same reference numerals in the first same part as the embodiment of, a detailed description thereof will be omitted.
第3の実施形態では、回転子を構成する回転子鉄心31の外周部に設けられる磁石挿入孔部32及び永久磁石33の形状及び配置が、上記第1の実施形態と異なる。 In the third embodiment, the shape and arrangement of the magnet insertion holes 32 and the permanent magnet 33 is provided on the outer periphery of the rotor core 31 constituting the rotor, different from the first embodiment. 即ち、本実施形態の磁石挿入孔部32は、回転子鉄心31のd軸に対応する箇所、本実施形態では8箇所に形成されている。 That is, the magnet insertion holes 32 of the present embodiment, the portion corresponding to the d-axis of the rotor core 31, in the present embodiment are formed in eight locations. この磁石挿入孔部32には、永久磁石33が挿入固定されている。 The magnet insertion holes 32, the permanent magnet 33 is inserted and fixed. この場合、永久磁石33の長尺方向の辺の一方が回転子鉄心31の外周と近接するように対向配置され、永久磁石33の長尺方向の辺の中心がd軸と一致して配置されている。 In this case, one of the longitudinal direction of the sides of the permanent magnet 33 are faced to each other so close to the outer periphery of the rotor core 31, the center of the longitudinal direction of the sides of the permanent magnet 33 is disposed coincident with the d-axis ing. 又、永久磁石33の端面33aの延長線と後述する外周孔部34のq軸側の端部付近(例えば、外周孔部34のq軸側の円弧端部のうちの、回転子鉄心31の外周側の端部)との交点部分が電気角φ になるように、永久磁石33の大きさが設定されている。 Moreover, the q-axis side of the outer peripheral hole 34 to be described later extension of the end face 33a of the permanent magnets 33 near the ends (e.g., of the arc end of the q-axis side of the outer peripheral hole 34, the rotor core 31 as the end) and the intersections of the outer peripheral side is an electrical angle phi 2, the size of the permanent magnet 33 is set. 尚、図示はしないが、d軸と周方向に隣合うd軸との間にあって、固定子鉄心4側で生じた磁束の通り易い部分をq軸とする。 Although not shown, located between the d-axis adjacent to the d-axis and the circumferential direction, the street tends portion of magnetic flux generated by the stator core 4 side and the q-axis.

この磁石挿入孔部32に永久磁石33が挿入固定されると、永久磁石33の両端部に逃げ孔部35,35が形成され、回転子鉄心31の外周部において、逃げ孔部35と回転子鉄心31の外周との間にチップ部36が必然的に形成される。 When the permanent magnet 33 is inserted and fixed into the magnet insertion holes 32 are holes 35, 35 escapes to the opposite ends of the permanent magnet 33 is formed in the outer peripheral portion of the rotor core 31, relief holes 35 and the rotor tip portion 36 is inevitably formed between the outer periphery of the core 31.

ここで、回転子鉄心31の永久磁石33より外周側の外周部には、前述したように、外周孔部34,34が形成されている。 Here, the outer peripheral portion of the outer peripheral side of the permanent magnets 33 of the rotor core 31, as described above, the outer peripheral holes 34 and 34 are formed. 各外周孔部34の、回転子鉄心31の周方向の範囲は、d軸に対する所定の角度(d軸に対して電気角φ )を存する位置から、d軸に対する所定の角度(d軸に対して電気角φ )を存する位置まで、即ち、d軸より離れる方向側(q軸側)に存するチップ部36近傍までである。 Each outer peripheral holes 34, the circumferential range of the rotor core 31, from the lie position (electrical angle phi 1 relative to the d-axis) a predetermined angle with respect to the d-axis, at a predetermined angle (d-axis with respect to the d-axis to a position exists an electrical angle phi 2) for, that is, to the vicinity tip portion 36 that exists in the direction (q-axis side) away from the d-axis.

上記構成の回転子(回転子鉄心31)には、上述したように、永久磁石33の長尺方向の辺の中心を通ようにd軸が形成され、又、周方向に隣合うd軸間にq軸が形成される(所謂磁気的凹凸が形成される)ので、第1の実施形態と同様に、トルクが発生する。 The above configuration of the rotor (rotor core 31), as described above, the d-axis is formed the center of the longitudinal direction of the sides of the permanent magnets 33 passing so, also, between the d-axis adjacent in the circumferential direction since the q-axis is formed (so-called magnetic unevenness is formed), as in the first embodiment, torque is generated. 又、回転子鉄心31には、永久磁石33が設けられているので、永久磁石33と固定子2(図2参照)の磁極との間の磁気吸引力及び磁気反発力によってもトルクは発生する。 Further, the rotor core 31, since the permanent magnets 33 are provided, the torque is generated by the magnetic attraction force and the magnetic repulsive force between the magnetic poles of the permanent magnets 33 and the stator 2 (see FIG. 2) .
又、外周孔部34を形成したので、第3の実施形態の回転子においても、第1の実施形態の回転子と同様の効果を奏する。 In addition, since the formed outer peripheral holes 34, also in the rotor of the third embodiment, the same effect as the rotor of the first embodiment.

尚、本発明は上記し且つ図面に示す実施形態に限定されず、次のような変形、拡張が可能である。 The present invention is not limited to the embodiments described above and shown in the drawings, the following modifications are possible extensions.
第2の実施形態の回転電機の回転子の外周孔部を、4個以上の孔で構成しても良い。 An outer hole portion of the rotor of the rotating electrical machine of the second embodiment, may be constituted by four or more holes.
第3の実施形態の回転電機の回転子の外周孔部を、第2の実施形態の外周孔部のように、複数個の孔で構成しても良い。 An outer hole portion of the rotor of the rotary electric machine of the third embodiment, as in the outer peripheral hole of the second embodiment may be constituted by a plurality of holes.
本発明の回転電機の回転子及び回転電機は、三相コイルに適用して説明したが、三相コイル以外の複数相のコイルにも適用できる。 The rotor and the rotary electric machine of the rotary electric machine of the present invention has been described as applied to a three-phase coil, it can be applied to the coils of a plurality of phases other than three-phase coil. 更に、上記した構成部品の寸法等についても、適宜変更することができる。 Furthermore, for the dimensions of the components described above can be appropriately changed. 又、車両用回転電機に限定されない。 Further, not limited to the rotary electric machine for a vehicle.

本発明の第1の実施形態を示す回転子の回転子鉄心の拡大図 Enlarged view of a rotor core of a rotor showing a first embodiment of the present invention 回転電機の全体構成を概略的に示す側面図 Side view schematically showing the overall configuration of a rotary electric machine 本発明の第2の実施形態を示す図1相当図 Figure 1 corresponds diagram showing a second embodiment of the present invention 本発明の第3の実施形態を示す図1相当図 Figure 1 corresponds diagram showing a third embodiment of the present invention 従来の回転子の回転子鉄心を示す図1相当図 Figure 1 corresponds diagram illustrating a rotor core of a conventional rotor

符号の説明 DESCRIPTION OF SYMBOLS

図面中、1は回転電機、3は回転子、4は固定子鉄心、5はU相コイル、6はV相コイル、7はW相コイル、11,21,31は回転子鉄心、13,32は磁石挿入孔部、14,33は永久磁石、19,22,34は外周孔部、22a,22b,22cは孔を示す。 In the drawings, 1 is the rotary electric machine, 3 the rotor, the stator core 4, the U-phase coil 5, the V-phase coil 6, 7 W-phase coils, 11, 21 and 31 rotor core 13, 32 the magnet insertion holes, 14 and 33 show the permanent magnets, 19,22,34 outer peripheral holes, 22a, 22b, 22c is a hole.

Claims (3)

  1. 回転子鉄心と、 And the rotor core,
    この回転子鉄心の外周部に周方向に一定の間隔を存して設けられた複数の磁石挿入孔部と、 A plurality of magnet insertion hole provided to exist a certain distance to the outer periphery of the rotor core in the circumferential direction,
    これらの磁石挿入孔部に夫々挿入固定された磁極形成用の永久磁石と、 And permanent magnets of the magnetic pole forming which are respectively inserted and fixed into these magnet insertion hole,
    前記回転子鉄心の外周部に設けられ、前記磁極の中心に対する所定の角度位置から前記中心より離れる方向側の所定の角度位置までの範囲にわたる外周孔部とを具備してなる回転電機の回転子。 Wherein provided on the outer peripheral portion of the rotor core, the rotor of the rotary electric machine from a predetermined angular position relative to the center of the magnetic pole formed by and a periphery holes ranging up to a predetermined angular position in direction away from the central .
  2. 外周孔部は、複数個の孔で構成されていることを特徴とする請求項1に記載の回転電機の回転子。 Outer peripheral holes, the rotor of the rotating electric machine according to claim 1, characterized in that it is constituted by a plurality of holes.
  3. 固定子鉄心と、 And the stator core,
    この固定子鉄心に着装されたコイルと、 A coil that is worn on the stator core,
    請求項1又は2に記載の回転子とを具備したことを特徴とする回転電機。 Rotary electric machine characterized by comprising a rotor as claimed in claim 1 or 2.
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CN105191068A (en) * 2013-03-14 2015-12-23 三菱电机株式会社 Electric motor with embedded permanent magnet, and compressor
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JP2015119547A (en) * 2013-12-18 2015-06-25 三菱電機株式会社 Permanent magnet type rotary electric machine
WO2015141415A1 (en) * 2014-03-18 2015-09-24 日産自動車株式会社 Rotor structure for rotating electric machine
JPWO2015141415A1 (en) * 2014-03-18 2017-04-06 日産自動車株式会社 The rotor structure of a rotating electric machine
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JP2016052196A (en) * 2014-09-01 2016-04-11 多摩川精機株式会社 Ipm motor and method for suppressing cogging torque thereof
CN107112828A (en) * 2014-10-01 2017-08-29 大众汽车有限公司 Rotor, synchronous machine and hybrid drive
CN106953431A (en) * 2015-09-29 2017-07-14 爱信精机株式会社 Three-phase rotating electrical machine
KR101791544B1 (en) 2016-07-07 2017-10-30 하이윈 마이크로시스템 코포레이션 Permanent magnet motor
JP2018011456A (en) * 2016-07-14 2018-01-18 大銀微系統股▲分▼有限公司Hiwin Mikrosystem Corp. Permanent magnet motor

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