JP4529500B2 - Axial gap rotating electric machine - Google Patents

Axial gap rotating electric machine Download PDF

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JP4529500B2
JP4529500B2 JP2004078259A JP2004078259A JP4529500B2 JP 4529500 B2 JP4529500 B2 JP 4529500B2 JP 2004078259 A JP2004078259 A JP 2004078259A JP 2004078259 A JP2004078259 A JP 2004078259A JP 4529500 B2 JP4529500 B2 JP 4529500B2
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rotor
permanent magnet
iron core
stator
support member
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JP2005269778A (en
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正広 長谷部
雅美 石川
晃 水野
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Equos Research Co Ltd
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Equos Research Co Ltd
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Description

本発明は、モータ、ジェネレータ等の回転電機に関し、特に円盤状の回転子と固定子を軸線方向に対向させたアキシャルギャップ回転電機に関する。   The present invention relates to a rotating electrical machine such as a motor and a generator, and more particularly to an axial gap rotating electrical machine in which a disk-shaped rotor and a stator are opposed in the axial direction.

円盤型の回転子に対して、回転子の軸線方向の端面に空隙を挟んで固定子を対向させて配置したいわゆるアキシャルギャップモータは従来から知られている。このモータは、軸線方向で対向した回転子と固定子の表面間で作用する磁力により回転駆動力を得るものである。アキシャルギャップモータは、在来の円筒状の回転子とその周面を取巻く環状の固定子とで構成されるいわゆるラジアルタイプのモータに対して、軸線方向の厚みを小さくできるという長所がある。   A so-called axial gap motor in which a stator is disposed opposite to a disk-type rotor with a gap interposed between end faces in the axial direction of the rotor is conventionally known. This motor obtains a rotational driving force by a magnetic force acting between the surfaces of a rotor and a stator opposed in the axial direction. The axial gap motor has an advantage that the axial thickness can be reduced as compared with a so-called radial type motor composed of a conventional cylindrical rotor and an annular stator surrounding the peripheral surface thereof.

従来知られているアキシャルギャップモータの形式には、回転子の固定子と対向する端面に磁性体部材により突極を形成したリラクタンス型や、固定子の回転駆動磁極に対応した回転子に軸線方向に磁極を向けて永久磁石を配置した永久磁石型がある。こうした永久磁石型を基本として、1つの固定子とそれを挟む一対の回転子で軸線方向に対称な薄型のダブルロータタイプのモータを構成した例として、特許文献1に記載のがある。この技術における回転子は、永久磁石を回転子鉄心の表面に張付けた構造のものである。
特開平10−80113号公報
The types of axial gap motors known in the art include a reluctance type in which salient poles are formed by magnetic members on the end face of the rotor facing the stator, and the rotor in the axial direction corresponding to the rotational drive magnetic pole of the stator. There is a permanent magnet type in which permanent magnets are arranged with the magnetic poles facing. Patent Document 1 discloses an example in which a thin double rotor type motor symmetrical in the axial direction is configured with one stator and a pair of rotors sandwiching the stator based on such a permanent magnet type. The rotor in this technique has a structure in which a permanent magnet is attached to the surface of the rotor core.
Japanese Patent Laid-Open No. 10-80113

ところで、出願人は、前記従来知られている形式とは異なるリラクタンス型と永久磁石型の組み合わせからなる回転電機を創案した。この創案に係る回転電機は、回転子の1つの面に鉄心と永久磁石を周方向に交互に配置し、永久磁石は、その磁極を回転子周方向に向けて配置する構成を採るものである。これによると、モータとしては、回転子の1つの面でリラクタンストルクと永久磁石トルクを発生可能とすることができる。したがって、この構成によると、1つの回転子面で発生できるトルクを大きくすることができ、従来例のアキシャルギャップモータより高トルク化が可能となる。   By the way, the applicant has created a rotating electrical machine composed of a combination of a reluctance type and a permanent magnet type different from the previously known type. The rotating electrical machine according to the present invention has a configuration in which iron cores and permanent magnets are alternately arranged on one surface of a rotor in the circumferential direction, and the permanent magnets are arranged with their magnetic poles oriented in the circumferential direction of the rotor. . According to this, as a motor, reluctance torque and permanent magnet torque can be generated on one surface of the rotor. Therefore, according to this configuration, it is possible to increase the torque that can be generated on one rotor surface, and it is possible to increase the torque compared to the conventional axial gap motor.

しかしながら、この構造は、従来の構造のように回転子の各極の鉄心がバックヨークでつながる一塊のものではなく、極ごとの分割構造となっているため、回転子鉄心と永久磁石を一塊にする支持部材が必要となる。しかもこの構造では、永久磁石の磁極を周方向に向けることによって、バックヨークがないコンパクト性が利点となるため、回転子鉄心と永久磁石の支持部材をいかにコンパクトにするかが課題となる。支持部材がバックヨークと同等の大きさでは、せっかくの利点が損なわれることになってしまう。   However, this structure is not a single-piece structure in which the iron core of each pole of the rotor is connected by the back yoke as in the conventional structure, but has a divided structure for each pole, so the rotor core and the permanent magnet are bundled together. A supporting member is required. In addition, in this structure, since the magnetic poles of the permanent magnets are directed in the circumferential direction, the compactness without the back yoke is an advantage. Therefore, how to make the rotor core and the permanent magnet support members compact is a problem. If the support member is of the same size as the back yoke, the precious advantages will be lost.

また、通常想起される取付け方法として、鉄心と永久磁石を支持部材に接着する方法があるが、この方法では、熱による接着力の低下によって、鉄心に作用する吸引力や、鉄心と永久磁石双方に作用する遠心力に対する耐久性の問題が予想される。こうした事情から、コンパクトかつ耐吸引力、耐遠心力に優れた支持構造が必要となる。   In addition, there is a method of attaching an iron core and a permanent magnet to a support member as an ordinary recalling method. In this method, both the iron core and the permanent magnet are attracted by the attraction force acting on the iron core due to a decrease in the adhesive force due to heat. The problem of durability against the centrifugal force acting on the surface is expected. Under these circumstances, a support structure that is compact and has excellent suction resistance and centrifugal resistance is required.

本発明は、前記出願人の創案に係るアキシャルギャップ回転電機において、この回転電機に特有のバックヨークを必要としないコンパクト特性を活かしつつ、独立した回転子鉄心や永久磁石に作用する吸引力や遠心力に耐え得るコンパクトかつ高強度な回転子構造を実現することを主たる目的とする。   The present invention provides an axial gap rotating electrical machine according to the applicant's idea, which utilizes a compact characteristic that does not require a back yoke that is unique to the rotating electrical machine, and also has an attractive force and centrifugal force acting on an independent rotor core and permanent magnet. The main purpose is to realize a compact and high-strength rotor structure that can withstand force.

前記の目的を達成するため、本発明は、永久磁石(11)と鉄心(12)を配置した回転子(1)と、該回転子の端面に軸線方向の空隙(G)を挟んで端面を対峙させた固定子(2)とを備えるアキシャルギャップ回転電機において、前記回転子は、互いに分離した複数の前記鉄心を嵌め込み支持して回転軸(10)に連結する支持部材(13)を有し、前記永久磁石は、磁極を回転子周方向に向けて、回転子周方向に鉄心の間で支持部材に着接され、前記支持部材は、鉄心にかかる遠心力による飛散を防止すべく、外周を支持する環状部(13b)、及び前記回転軸に嵌め込まれるハブ部(13a)と前記環状部とをつなぐスポーク部(13c)を有し、前記永久磁石は、スポーク部に沿わせて配置され、前記鉄心は、ハブ部とスポーク部と環状部とで囲まれる空間に相互に離隔して配置されたことを主要な特徴とする。
前記構成において、前記鉄心は、該鉄心に作用する前記固定子の吸引力による前記空隙を減少する方向への抜け出しを阻止すべく、前記支持部材が前記固定子と対峙する面の裏側において支持部材と当接する係合部(12a)を備える構成とすることが望ましい。
あるいは、前記永久磁石は、前記スポーク部が前記固定子と対峙する面側に着接された構成とすることが望ましい。
また、前記永久磁石は、前記スポーク部が前記固定子と対峙する面の裏側でスポーク部に着接され、前記鉄心は、該鉄心に作用する固定子の吸引力による前記空隙を減少する方向への抜け出しを阻止すべく、前記永久磁石の前記スポーク部に着接した面の裏側に当接する係合部(12b)を備える構成とするのも有効である。
前記いずれかの構成において、前記鉄心の係合部は、鉄心から回転子周方向、又は径方向に張出す突起で構成されていることが望ましい。
また、前記永久磁石は、前記回転子の径方向内側に向かって軸線方向の厚さを減じるものとされ、前記支持部材のスポーク部は、回転子の径方向内側に向かって軸線方向の厚さを増すものとされている構成が有効である。
In order to achieve the above-described object, the present invention provides a rotor (1) having a permanent magnet (11) and an iron core (12) disposed thereon, and an end face with an axial gap (G) interposed between the end faces of the rotor. In an axial gap rotating electrical machine having a stator (2) opposed to each other, the rotor has a support member (13) that fits and supports a plurality of the iron cores separated from each other and is connected to the rotating shaft (10). The permanent magnet is attached to a support member between the iron cores in the rotor circumferential direction with the magnetic poles oriented in the rotor circumferential direction, and the support member has an outer periphery to prevent scattering due to centrifugal force applied to the iron core. And a spoke portion (13c) that connects the annular portion with a hub portion (13a) fitted to the rotating shaft, and the permanent magnet is disposed along the spoke portion. The iron core has a hub part and a spoke part. And main feature that it is spaced apart from each other in a space surrounded by the annular portion.
In the above configuration, the iron core is supported on the back side of the surface where the support member faces the stator in order to prevent the stator from acting in the direction of decreasing the gap due to the suction force of the stator acting on the iron core. It is desirable to have a configuration including an engaging portion (12a) that comes into contact.
Alternatively, it is desirable that the permanent magnet has a configuration in which the spoke portion is attached to a surface facing the stator.
The permanent magnet is attached to the spoke part on the back side of the surface where the spoke part faces the stator, and the iron core is in a direction to reduce the gap due to the attractive force of the stator acting on the iron core. It is also effective to include an engaging portion (12b) that comes into contact with the back side of the surface of the permanent magnet attached to the spoke portion so as to prevent the permanent magnet from coming off.
In any one of the above-described configurations, it is preferable that the engaging portion of the iron core is formed by a protrusion protruding from the iron core in the circumferential direction of the rotor or in the radial direction.
Further, the permanent magnet is configured such that the thickness in the axial direction decreases toward the radially inner side of the rotor, and the spoke portion of the support member has a thickness in the axial direction toward the radially inner side of the rotor. It is effective to use a configuration that increases

本発明のアキシャルギャップ回転電機によれば、極数分に分割された回転子鉄心と永久磁石を支持部材によりバックヨークなしで一塊にして回転軸と繋ぐコンパクトな回転子構造を得ることができる。また、支持部材外周の環状部をスポーク部でハブ部と連結する形状により、軸線方向に鉄心の厚さに更なる厚さを加えることになるバックヨーク状の部品が不要となり、鉄心の厚さ以上に回転子を厚くすることなく、回転子鉄心と永久磁石が遠心力により飛散するのを防ぐことができる。
更に、鉄心に係合部を備える構成では、固定子の吸引力により回転子の鉄心が空隙を詰める方向に吸着されるのを防いで、鉄心の支持部材への着接手段に頼ることなく構造的に確実に空隙を保持することができる。
According to the axial gap rotating electrical machine of the present invention, it is possible to obtain a compact rotor structure in which a rotor core and permanent magnets divided into the number of poles are bundled together with a support member without a back yoke and connected to a rotating shaft. In addition, the shape of connecting the annular part of the outer periphery of the support member to the hub part by the spoke part eliminates the need for a back yoke-like component that adds additional thickness to the thickness of the iron core in the axial direction. As described above, the rotor core and the permanent magnet can be prevented from being scattered by centrifugal force without increasing the thickness of the rotor.
Further, in the configuration in which the engaging portion is provided in the iron core, the rotor iron core is prevented from being adsorbed in the direction of filling the gap by the suction force of the stator, and the structure does not depend on the means for attaching the iron core to the support member. Therefore, it is possible to reliably hold the gap.

本発明における回転子の支持部材は、そのハブ部については、空隙に対峙する回転子端面の固定子端面に対する面ぶれを少なくすべく、回転子鉄心の軸線方向長さの範囲で回転軸との嵌め合い部長さを長くするように、可及的に長くされることが望ましい。またスポーク部については、鉄心と永久磁石の間に形成されるスペースを介してハブ部と環状部につながる配置とするのが有効である。こうしたスポーク部配置を採る理由は次のとおりである。   In the rotor support member of the present invention, the hub portion of the rotor support member is in contact with the rotating shaft within the range of the axial length of the rotor core in order to reduce surface blurring of the rotor end surface facing the gap with respect to the stator end surface. It is desirable to lengthen the length of the fitting portion as long as possible. In addition, it is effective to arrange the spoke portion so as to be connected to the hub portion and the annular portion through a space formed between the iron core and the permanent magnet. The reason for adopting such a spoke arrangement is as follows.

アキシャルギャップ回転電機においては、回転子鉄心は、磁気飽和を生じない程度に軸方向の厚さが必要であり、磁極を周方向に向けて磁石を配置した本発明の前提となる回転子構造では、永久磁石の回転子軸線方向厚さより鉄心の厚さが厚くなる傾向にある。そこで、鉄心が磁気飽和を起こさないようその厚さを決定すると、軸方向の厚さとしては、永久磁石より鉄心の方が厚くなる。このため、磁気特性だけを考慮すると回転子軸線方向に隣接する鉄心と磁石に囲まれた部分に空間が生じることになる。本発明は、この磁気特性から生じる空間に回転子の環状部を支えるスポーク部を配置することで、磁気特定的に余分な空間を回転子を強度的に支える構造に用いることを主要な特徴とする。   In an axial gap rotating electrical machine, the rotor core must have an axial thickness that does not cause magnetic saturation, and in the rotor structure that is the premise of the present invention in which the magnets are arranged with the magnetic poles oriented in the circumferential direction. The thickness of the iron core tends to be thicker than the thickness of the permanent magnet in the rotor axial direction. Therefore, when the thickness of the iron core is determined so as not to cause magnetic saturation, the iron core is thicker than the permanent magnet as the axial thickness. For this reason, if only the magnetic characteristics are taken into consideration, a space is generated in a portion surrounded by the iron core and the magnet adjacent in the rotor axial direction. The main feature of the present invention is that a spoke portion that supports the annular portion of the rotor is disposed in the space resulting from the magnetic characteristics, and that the extra magnetically specific space is used for a structure that strongly supports the rotor. To do.

前記の構成を採ると、回転子支持部材は、回転子鉄心の軸方向厚さ内に収まる形状となるため、磁石埋込のコンパクト性を損なうことなく、耐吸引力、耐遠心力に優れた高強度は回転電機構成とすることができる。   By adopting the above configuration, the rotor support member has a shape that fits within the axial thickness of the rotor core, so that it has excellent suction resistance and centrifugal resistance without impairing the compactness of the magnet embedding. High strength can be a rotating electrical machine configuration.

以下、図面を参照して、本発明の実施例を説明する。図1〜図3は実施例1を示す。図1は回転電機の模式化した断面を示す。また、図2は回転子の構造を分解して斜視状態で示す。更に、図3は回転子の一部断面を平面上に展開して回転子断面構造を示す。この実施例における回転電機は、図1に示すように、ダブルロータタイプとして構成されており、永久磁石11と鉄心12を配置した一対の回転子1と、それら回転子の対向する端面に軸線方向の空隙を挟んで背反する端面を対峙させた固定子2とを備える。   Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment. FIG. 1 shows a schematic cross section of a rotating electrical machine. FIG. 2 is an exploded perspective view of the rotor structure. Further, FIG. 3 shows a rotor cross-sectional structure by developing a partial cross-section of the rotor on a plane. As shown in FIG. 1, the rotating electrical machine in this embodiment is configured as a double rotor type, and a pair of rotors 1 in which a permanent magnet 11 and an iron core 12 are arranged, and axial directions on opposite end faces of these rotors. And a stator 2 that faces opposite end faces across the gap.

両回転子1は、互いに分離した複数の鉄心12を嵌め込み支持して回転軸10に連結する支持部材13を有する。永久磁石11は、磁極を回転子周方向(図1において紙面に垂直な方向)に向けて、回転子周方向に鉄心12の間で支持部材13に着接されている。支持部材13は、各鉄心12にかかる遠心力による飛散を防止すべく、外周を支持する環状部13bを有する。   Both the rotors 1 have support members 13 that are fitted and supported by a plurality of cores 12 separated from each other and connected to the rotary shaft 10. The permanent magnet 11 is attached to the support member 13 between the iron cores 12 in the rotor circumferential direction with the magnetic poles oriented in the rotor circumferential direction (direction perpendicular to the paper surface in FIG. 1). The support member 13 has an annular portion 13b that supports the outer periphery in order to prevent scattering due to the centrifugal force applied to each iron core 12.

支持部材13は、回転軸10に嵌め込むハブ部13aと環状部13bとをつなぐスポーク部13cを有し、該スポーク部は、図3に示すように、隣り合う鉄心12とそれら鉄心の間に配置された永久磁石11とで囲われる回転子径方向の空間を径方向に延び、隣り合う鉄心12を相互に非接触状態としている。   The support member 13 has a spoke portion 13c that connects a hub portion 13a and an annular portion 13b that are fitted to the rotary shaft 10, and the spoke portion is located between adjacent iron cores 12 and the iron cores as shown in FIG. A space in the radial direction of the rotor surrounded by the arranged permanent magnets 11 extends in the radial direction, and the adjacent iron cores 12 are not in contact with each other.

換言すれば、支持部材13は、回転軸10に嵌め込むハブ部13aと環状部13bとをつなぐスポーク部13cを有し、永久磁石11は、スポーク部13cに沿わせて配置され、鉄心12は、ハブ部13aとスポーク部13cと環状部13bとで囲まれる空間に相互に離隔して配置されている。   In other words, the support member 13 has a spoke portion 13c that connects the hub portion 13a and the annular portion 13b that are fitted into the rotary shaft 10, the permanent magnet 11 is disposed along the spoke portion 13c, and the iron core 12 is In the space surrounded by the hub portion 13a, the spoke portion 13c, and the annular portion 13b, they are spaced apart from each other.

この実施例では、鉄心12は、該鉄心に作用する固定子2の吸引力による空隙Gを減少する方向への抜け出しを阻止すべく、支持部材13が固定子2と対峙する面の裏側において支持部材13と当接する係合部12aを備える。永久磁石11は、スポーク部13cが固定子2と対峙する面側に着接されている。   In this embodiment, the iron core 12 is supported on the back side of the surface where the support member 13 faces the stator 2 in order to prevent the stator 2 acting on the iron core from coming out in the direction of decreasing the gap G due to the suction force. The engaging part 12a which contacts the member 13 is provided. The permanent magnet 11 is attached to the surface side where the spoke portion 13 c faces the stator 2.

更に、各部分ごとに細部構成を説明する。図1を参照して、回転子1と固定子2を収容するケース3は、回転子1の支持部材13を嵌め込む回転軸10の両端をベアリング6を介して回転自在に支持するものとされている。   Further, the detailed configuration will be described for each part. Referring to FIG. 1, a case 3 that accommodates a rotor 1 and a stator 2 is configured to rotatably support both ends of a rotary shaft 10 into which a support member 13 of the rotor 1 is fitted via a bearing 6. ing.

固定子2は、軸線方向にみて概ね扇形の鉄心21の周りにコイル22を巻付けたものを所期の極数分だけ周方向に並べて、全体として円環状とされ、板状の支持部材23を介してケース3に取付け支持した構成とされている。なお、図1において、固定子2の鉄心21は、薄板電磁鋼板を周方向又は径方向に積層するか、軟磁性複合材料の成型品で構成される。   The stator 2 has an annular shape as a whole by arranging a coil 22 wound around a generally iron-shaped iron core 21 in the axial direction in the circumferential direction by the desired number of poles. It is set as the structure attached and supported to the case 3 via. In FIG. 1, the iron core 21 of the stator 2 is formed by laminating thin electromagnetic steel plates in the circumferential direction or the radial direction, or is formed of a soft magnetic composite material.

一対の回転子1は、それぞれ図2に示すように、極数に応じた永久磁石11と、同数の鉄心12と、それらを支持する支持部材13とから構成されている。永久磁石11は、その形状を特に限定されるものではないが、この例では、矩形断面の棒状とされ、長手方向を放射方向(回転子径方向)に向けて、回転子支持部材13のスポーク部13cの前面、すなわち、スポーク部13cが固定子と対峙する面側に配置されている。永久磁石をこのように配置すると、スポーク部13cは固定子と回転子の間の空隙から永久磁石の厚さ分だけ軸線方向に離れた位置に配置できることになる。部材が配置される位置が空隙に近いほど、その部材内に渦電流が発生しやすくなり、モータの効率を低下させる原因となる。永久磁石は、分割することで内部に発生する渦電流を低く抑えることができるが、スポーク部13cは、ハブ部13aと環状部13bを連結するため分割することができない。そこで上記構成では、スポーク部13cを空隙から遠ざけることによってスポーク部13c内に発生する渦電流を小さくすることができ、モータの効率を低下させずにすむという効果がある。   As shown in FIG. 2, each of the pair of rotors 1 includes a permanent magnet 11 corresponding to the number of poles, the same number of iron cores 12, and a support member 13 that supports them. The shape of the permanent magnet 11 is not particularly limited. In this example, the permanent magnet 11 is a rod having a rectangular cross section, and the spokes of the rotor support member 13 are oriented in the radial direction (rotor radial direction). The front surface of the portion 13c, that is, the spoke portion 13c is disposed on the surface facing the stator. When the permanent magnet is arranged in this way, the spoke portion 13c can be arranged at a position away from the gap between the stator and the rotor in the axial direction by the thickness of the permanent magnet. As the position where the member is arranged is closer to the air gap, eddy currents are more likely to be generated in the member, causing a reduction in motor efficiency. By dividing the permanent magnet, the eddy current generated inside can be kept low, but the spoke portion 13c cannot be divided because it connects the hub portion 13a and the annular portion 13b. Therefore, in the above configuration, the eddy current generated in the spoke portion 13c can be reduced by moving the spoke portion 13c away from the gap, and there is an effect that the efficiency of the motor can be prevented from being lowered.

鉄心12は、電磁鋼板を積層したもの又は軟磁性粉末材料を使用して形成されたもので構成される。その形状は、軸方向視で概ね扇形とされ、その軸線方向の厚さは、永久磁石11の厚さと、支持部材13のスポーク部13cの厚を合わせた厚さより更に厚みのあるものとされている。鉄心12が固定子2の鉄心21と対峙する面とは反対側(裏側)の端面側には、支持部材13と当接する係合部12aが設けられている。この係合部12aは、各鉄心12から張出す突起で構成されている。図1では構成を模式化しているため、他の図と異なり、この突起が径方向に張出すものとして描かれているが、この突起は、実際に回転子径方向に張出して支持部材の環状部13bとハブ部13aの端面に当接するものでもよいし、図2及び図3に示すように回転子周方向に張出して支持部材13のスポーク部13cに係合するものでもよい。更にこの突起は、図2に示すように連続するものでも、局部的又は間歇的のものでもよい。特に、係合部からの磁束短絡を少なくするには、模式断面図1のように、内径側と外径側で支持部材に軸方向で当接するように、鉄心から回転子径方向に張出す突起状の係合部を設けるのが有効である。   The iron core 12 is configured by laminating electromagnetic steel plates or using a soft magnetic powder material. The shape is generally fan-shaped when viewed in the axial direction, and the thickness in the axial direction is greater than the total thickness of the permanent magnet 11 and the spoke portion 13c of the support member 13. Yes. An engaging portion 12 a that contacts the support member 13 is provided on the end surface side opposite to the surface (back side) of the iron core 12 facing the iron core 21 of the stator 2. The engaging portion 12 a is formed by a protrusion that protrudes from each iron core 12. Since the configuration is schematically shown in FIG. 1, unlike the other drawings, this protrusion is depicted as extending in the radial direction. However, this protrusion actually protrudes in the rotor radial direction and the support member is annular. It may be in contact with the end surfaces of the portion 13b and the hub portion 13a, or may be projected in the circumferential direction of the rotor and engaged with the spoke portion 13c of the support member 13 as shown in FIGS. Further, the protrusions may be continuous as shown in FIG. 2, or may be local or intermittent. In particular, in order to reduce the magnetic flux short circuit from the engaging portion, as shown in the schematic cross-sectional view 1, the rotor extends in the radial direction of the rotor so as to abut the support member in the axial direction on the inner diameter side and the outer diameter side. It is effective to provide a protruding engagement portion.

支持部材13は、非磁性金属材から構成され、回転軸10に嵌め込む部分を構成するハブ部13aと、永久磁石11及び鉄心12の外周側に接する環状部13bと、それらをつなぐスポーク部13cを一体的に備える構成とされている。ハブ部13aは、回転子の空隙に面する面の面ぶれを防止すべく、スポーク部13cとの連結部から軸線方向一方側に所定の長さ延びるものとされ、図示されていないが、回転軸10に対してスプライン係合等の回り止め手段で固定されている。環状部13bは、支持部材において最も薄肉部となるスポーク部より軸線方向に長い幅を持ち、径方向厚さは、強度保持上必要な肉厚とされている。   The support member 13 is made of a nonmagnetic metal material, and includes a hub portion 13a that constitutes a portion that fits into the rotary shaft 10, an annular portion 13b that contacts the outer peripheral side of the permanent magnet 11 and the iron core 12, and a spoke portion 13c that connects them. Are integrally provided. The hub portion 13a extends a predetermined length from the connecting portion with the spoke portion 13c to one side in the axial direction in order to prevent the surface of the rotor facing the gap of the rotor from rotating. It is fixed to the shaft 10 by a detent means such as spline engagement. The annular portion 13b has a longer width in the axial direction than the spoke portion, which is the thinnest portion of the support member, and the radial thickness is a thickness necessary for maintaining strength.

スポーク部13cは、ハブ部13aの外周から放射方向に延びるものとされ、それにより、ハブ部外周と、環状部内周と、隣り合うスポーク部周方向面との間に扇形の鉄心嵌め込みスペースを形成している。スポーク部13cの軸線方向位置は、環状部13bの軸線方向幅に対して固定子と対峙する面より遠い側に寄せられている。この位置のずれは、スポーク部13cの固定子2と対峙する側に永久磁石配置スペースを確保するためのものである。   The spoke portion 13c extends radially from the outer periphery of the hub portion 13a, thereby forming a fan-shaped core insertion space between the outer periphery of the hub portion, the inner periphery of the annular portion, and the circumferential surface of the adjacent spoke portion. is doing. The position of the spoke portion 13c in the axial direction is brought closer to the side farther than the surface facing the stator with respect to the axial width of the annular portion 13b. This positional shift is for securing a permanent magnet arrangement space on the side of the spoke portion 13c facing the stator 2.

こうした構成からなる永久磁石11、鉄心12及び支持部材13は、鉄心11を前記扇形スペースに嵌めて鉄心の係合部12aがスポーク部の背面に当接するまで押し込み、隣り合う鉄心12間とスポーク部13cの前面に形成されるスペースに永久磁石11を嵌めて、鉄心11又はスポーク部13c若しくはそれら両方に接着固定することで一体化された回転子1が構成される。   The permanent magnet 11, the iron core 12, and the support member 13 having such a structure are inserted until the iron core 11 is fitted into the fan-shaped space and the iron core engaging portion 12 a comes into contact with the back surface of the spoke portion, and between the adjacent iron cores 12 and the spoke portion. The integrated rotor 1 is configured by fitting the permanent magnet 11 in the space formed on the front surface of 13c and adhesively fixing it to the iron core 11 and / or the spoke portion 13c.

回転子鉄心12は、前記のように積層鋼板又は軟磁性複合材料の成型品とされる。この場合の軟磁性複合材料は、強度が劣るが渦電流を低減できる点で有効である。逆に積層鋼板は高強度であるが、アキシャルギャップモータにおいて、ラジアルギャップモータのように軸方向に積層していくと、渦電流低減の効果が無いため、積層方向は円周方向又は径方向にする必要がある。積層方法としては種々の方法を採り得る。   As described above, the rotor core 12 is a molded product of a laminated steel plate or a soft magnetic composite material. The soft magnetic composite material in this case is effective in that the eddy current can be reduced although the strength is inferior. Conversely, laminated steel sheets have high strength, but in axial gap motors, if they are laminated in the axial direction as in radial gap motors, there is no effect of reducing eddy currents, so the laminating direction should be circumferential or radial. There is a need to. Various methods can be adopted as the lamination method.

次に示す図4は、回転子鉄心12を積層構造とする場合の具体的構造例を模式化して示す。この構造の場合、図4(A)に示すように平板状の電磁鋼板Sを回転子の概ね周方向に積層したものでも、図4(B)に示すように同心円状状に湾曲した電磁鋼板Sを回転子半径方向に積層したもの、あるいは平板状の電磁鋼板を積層後に回転子周方向に湾曲させたものでも、また、図4(C)に示すように長さの異なる平板状の電磁鋼板Sを積層し、回転子径方向が積層方向となるように概ね扇形にしたものでもよい。   FIG. 4 shown next schematically shows a specific structural example in the case where the rotor core 12 has a laminated structure. In the case of this structure, even if a flat electromagnetic steel sheet S is laminated in the circumferential direction of the rotor as shown in FIG. 4A, the electromagnetic steel sheet curved concentrically as shown in FIG. 4B. Even if S is laminated in the rotor radial direction, or a flat electromagnetic steel sheet is curved in the rotor circumferential direction after being laminated, flat electromagnetic waves having different lengths as shown in FIG. The steel plates S may be stacked and may be generally fan-shaped so that the rotor radial direction is the stacking direction.

次に示す図5は、実施例1の構成を更に具体化した具体例を断面図で示す。この例では、ケース3は、2つのケース部分で構成され、一方のケース部分3Aは、その周壁から内径方向に張出し、固定子2を固定する取付け基準面を持つ取付け部31を有し、また、端壁の径方向内側に軸受収容部を有する。他方のケース部分3Bは、ケース部分3Aの開放端側を覆うものとされ、端壁の径方向内側でケース内に張出す筒状の軸受収容部を有する。   FIG. 5 shown next is a cross-sectional view showing a specific example in which the configuration of the first embodiment is further specified. In this example, the case 3 is composed of two case portions, and one case portion 3A has an attachment portion 31 that protrudes from the peripheral wall in the inner diameter direction and has an attachment reference surface for fixing the stator 2. A bearing housing portion is provided on the radially inner side of the end wall. The other case portion 3B covers the open end side of the case portion 3A, and has a cylindrical bearing housing portion that projects into the case on the radially inner side of the end wall.

固定子2は、板状の支持部材23に取付け支持した構成とされている。支持部材23は、その外周側に複数のボルト通し孔を有するものとされ、ボルト締めにより一方のケース3Aの取付け部31に一対の回転子1に対する軸線方向位置を調整するシム4を挟んで取付け固定されている。   The stator 2 is configured to be mounted and supported on a plate-like support member 23. The support member 23 has a plurality of bolt holes on its outer peripheral side, and is attached to the attachment portion 31 of one case 3A with a shim 4 that adjusts the axial position of the pair of rotors 1 by bolting. It is fixed.

前記実施例1のように一体化された一対の回転子1は、軸線方向に延びるハブ部を向かい合わせにして回転軸10に嵌め込まれている。2つのハブ部13aを合わせた軸線方向長さは、埋め込み状態の回転子鉄心12の対向する端面と固定子鉄心21の背反する端面との間に所定の空隙が生じる長さとされている。したがって、この例では、ハブ部13aが一対の回転子1の間隔保持手段を構成する。   The pair of rotors 1 integrated as in the first embodiment are fitted into the rotary shaft 10 with the hub portions extending in the axial direction facing each other. The axial length of the two hub portions 13a together is such that a predetermined gap is generated between the opposing end surface of the embedded rotor core 12 and the opposite end surface of the stator core 21. Therefore, in this example, the hub portion 13 a constitutes a gap holding means for the pair of rotors 1.

一対の回転子1を支持する回転軸10は、支持部材13のハブ部13aが嵌る周面部分をケース3への軸受支持部分より若干大径とした軸とされ、大径軸部の一端にカラー10aを備えている。このカラー10aは、その一方の端面にベアリング6のインナレースを当接させ、他方の端面に回転子1の支持部材13を当接させて位置決めするためのものである。大径軸部分の軸線方向長さは、2つのハブ部13aの軸線方向長さを合わせた長さより若干短く設定されている。なお、図示を省略しているが、大径軸部の外周面には、スプライン等からなる回り止め手段が設けられ、ハブ部13aの内周面に形成されたスプライン等の回り止め手段との係合により、一対の回転子1と回転軸10は、相対回転することなくトルクを伝達可能とされている。   The rotating shaft 10 that supports the pair of rotors 1 is a shaft in which the peripheral surface portion into which the hub portion 13a of the support member 13 fits is slightly larger in diameter than the bearing support portion to the case 3, and is provided at one end of the large diameter shaft portion. A collar 10a is provided. The collar 10a is used for positioning the inner race of the bearing 6 on one end face thereof and the support member 13 of the rotor 1 on the other end face thereof. The axial length of the large-diameter shaft portion is set slightly shorter than the total length of the two hub portions 13a in the axial direction. Although not shown, the outer peripheral surface of the large-diameter shaft portion is provided with a detent means such as a spline, and the anti-rotation means such as a spline formed on the inner peripheral surface of the hub portion 13a. By the engagement, the pair of rotors 1 and the rotation shaft 10 can transmit torque without rotating relative to each other.

回転軸10は、一対のアンギュラボールベアリング6を介してケース3に支持されている。この回転軸10は,前記のようにカラー10aを一方のベアリングのインナレースに当接させることでケース部分3Aに対して位置決めされている。   The rotating shaft 10 is supported by the case 3 via a pair of angular ball bearings 6. As described above, the rotary shaft 10 is positioned with respect to the case portion 3A by bringing the collar 10a into contact with the inner race of one of the bearings.

回転軸10は、更にベアリング嵌合部の外側にナット締め用のねじ部10bを備えている。更に、一方のケース部分3Aの端壁には、ボルト締結用のねじ孔が形成され、このねじ孔に、一方のベアリング6のアウタレースをケース3Aに固定する押え金具8がボルト止め固定される構成とされている。   The rotary shaft 10 further includes a screw portion 10b for tightening the nut outside the bearing fitting portion. Further, a screw hole for fastening the bolt is formed in the end wall of the one case portion 3A, and a presser fitting 8 for fixing the outer race of the one bearing 6 to the case 3A is fixed to the screw hole with the bolt. It is said that.

この例の特徴として、永久磁石11は、回転子1の径方向内側に向かって軸線方向の厚さを減じるものとされ、支持部材13のスポーク部13cは、回転子1の径方向内側に向かって軸線方向の厚さを増すものとされている。   As a feature of this example, the permanent magnet 11 decreases in thickness in the axial direction toward the radially inner side of the rotor 1, and the spoke portion 13 c of the support member 13 faces toward the radially inner side of the rotor 1. Therefore, the thickness in the axial direction is increased.

この構成によると、径方向内側に向かってスポーク部の断面係数を増すことができるため、スポーク部全体の剛性強度を増すことができ、回転子の空隙対峙面の面ブレを一層低減することができる利点が得られる。   According to this configuration, since the section modulus of the spoke portion can be increased toward the radially inner side, the rigidity strength of the entire spoke portion can be increased, and surface blurring of the rotor against the air gap can be further reduced. Benefits that can be obtained.

しかも、この構成では、外径側より内径側で磁石量(体積)を少なくすることができる。内径側で磁石量を少なくすることができるのは2つの理由がある。ひとつは、回転軸からの半径が小さい位置ほど、永久磁石と固定子の間で生じる力がモータトルクに寄与する効果が少ないので、相対的に外径側の磁石量を多く、内径側の磁石量を少なくすることで、モータ全体の磁石量に対するトルク出力を大きくすることができるからである。もう一つの理由は、内径側ほど鉄心が磁気飽和に至る磁束量が小さいため、外径側より内径側の磁石量を減らす(すなわち磁石が生じる磁束を減らす)ことで、外径側、内径側ともに磁気飽和に至る磁束量の許容量以下でかつできるだけ大きい磁束を発生させることができるからである。ここで内径側で磁気飽和が生じやすいのは次の理由による。回転子及び固定子の鉄心は、軸方向からみると扇形をしており、内径側ほど、扇の円弧の長さが小さくなる。永久磁石からの磁束は、空隙を挟んで軸方向に回転子鉄心から固定子鉄心へ通る。すなわち扇状の面全体が磁路となるが、内径側ほど扇状の円弧の長さが小さくなるということは、径方向単位長さ当りの磁路断面積が小さくなるということになる。磁路断面積が小さければ磁気飽和に至る磁束量も小さくなるからである。   In addition, with this configuration, the magnet amount (volume) can be reduced on the inner diameter side than on the outer diameter side. There are two reasons why the amount of magnet can be reduced on the inner diameter side. One is that the smaller the radius from the rotating shaft, the less the effect that the force generated between the permanent magnet and the stator contributes to the motor torque. It is because the torque output with respect to the magnet amount of the whole motor can be increased by reducing the amount. Another reason is that the amount of magnetic flux at which the iron core reaches magnetic saturation is smaller toward the inner diameter side, so reducing the amount of magnet on the inner diameter side than the outer diameter side (that is, reducing the magnetic flux generated by the magnet) This is because it is possible to generate as much magnetic flux as possible and less than the allowable amount of magnetic flux leading to magnetic saturation. Here, the reason why magnetic saturation tends to occur on the inner diameter side is as follows. The iron core of the rotor and the stator has a fan shape when viewed from the axial direction, and the length of the arc of the fan becomes smaller toward the inner diameter side. Magnetic flux from the permanent magnet passes from the rotor core to the stator core in the axial direction across the gap. That is, the entire fan-shaped surface becomes a magnetic path, but the smaller the length of the fan-shaped arc toward the inner diameter side, the smaller the magnetic path cross-sectional area per radial unit length. This is because if the magnetic path cross-sectional area is small, the amount of magnetic flux leading to magnetic saturation is also small.

以上詳述した実施例1では、極数分に分割された回転子鉄心12と永久磁石11を支持部材13によりバックヨークなしで一塊にして回転軸10と繋ぐコンパクトな回転子構造を得ることができる。また、支持部材外周の環状部13bをスポーク部13cでハブ部13aと連結する形状により、軸線方向に鉄心12の厚さに更なる厚さを加えることになるバックヨーク状の部品が不要となり、鉄心12の厚さ以上に回転子1を厚くすることなく、回転子鉄心12と永久磁石11の回転子外周側を環状部13bが押さえ込むことで、回転子鉄心12と永久磁石11の支持部材13への接着力に依存することなく、遠心力により飛散するのを防ぐことができる。更に、鉄心12に係合部12aを備えるため、固定子2の吸引力により回転子1の鉄心12が空隙を詰める方向に吸着されるのを、同様に接着力に依存することなく構造的に防いで、確実に空隙を保持することができる。   In the first embodiment described above in detail, a compact rotor structure can be obtained in which the rotor core 12 and the permanent magnet 11 divided into the number of poles are bundled together by the support member 13 without the back yoke and connected to the rotary shaft 10. it can. Further, the shape of connecting the annular portion 13b on the outer periphery of the support member to the hub portion 13a by the spoke portion 13c eliminates the need for a back yoke-like component that adds further thickness to the thickness of the iron core 12 in the axial direction. The support member 13 for the rotor core 12 and the permanent magnet 11 is formed by the annular portion 13b pressing the rotor outer periphery of the rotor core 12 and the permanent magnet 11 without making the rotor 1 thicker than the thickness of the core 12. It is possible to prevent scattering due to centrifugal force without depending on the adhesive force to. Further, since the iron core 12 is provided with the engaging portion 12a, the iron core 12 of the rotor 1 is adsorbed in the direction of filling the gap by the suction force of the stator 2, and similarly, without depending on the adhesive force. It can prevent and can hold | maintain a space | gap reliably.

次に図6〜図8を参照して示す実施例2は、前記実施例1とは逆に、永久磁石11は、スポーク部13cが固定子2と対峙する面の裏側でスポーク部13cに着接され、鉄心12は、該鉄心に作用する固定子2の吸引力による空隙を減少する方向への抜け出しを阻止すべく、永久磁石11のスポーク部13cに着接した面の裏側に当接する係合部12bを備える例である。この例においても、回転電機を構成する各構成要素は、支持部材13の細部構成を除き、全て実施例1と同様であるので、構成要素個々の説明は、対応する要素に同じ参照符号を付して説明に代え、以下、支持部材13の細部構成の違いと、配置関係の相違点のみ説明する。   Next, in Example 2 shown with reference to FIGS. 6 to 8, contrary to Example 1, the permanent magnet 11 is attached to the spoke part 13 c on the back side of the surface where the spoke part 13 c faces the stator 2. The iron core 12 is in contact with the back side of the surface of the permanent magnet 11 that is in contact with the spoke portion 13c in order to prevent the stator 2 acting on the iron core from coming out in the direction of decreasing the gap due to the attractive force. It is an example provided with the joint part 12b. Also in this example, since each component constituting the rotating electrical machine is the same as that of the first embodiment except for the detailed configuration of the support member 13, the description of each component is given the same reference numeral to the corresponding component. Instead of the description, only the difference in the detailed configuration of the support member 13 and the difference in the arrangement relationship will be described below.

この例における支持部材13は、図7を参照して、実施例1のものとは逆に、スポーク部13cの軸線方向位置は、環状部13bの軸線方向幅に対して固定子2と対峙する面より近い側に寄せられている。この配置は、スポーク部13cの固定子2と対峙する面の裏側に永久磁石配置スペースを確保すると共に永久磁石11の回転子放射方向への遠心力による飛び出しを防ぐための配置である。   In the support member 13 in this example, the axial position of the spoke portion 13c is opposed to the stator 2 with respect to the axial width of the annular portion 13b, as opposed to that of the first embodiment with reference to FIG. It is brought closer to the surface. This arrangement is an arrangement for securing a permanent magnet arrangement space behind the surface facing the stator 2 of the spoke portion 13c and preventing the permanent magnet 11 from popping out due to centrifugal force in the rotor radial direction.

この例の場合、永久磁石11、鉄心12及び支持部材13は、永久磁石11をスポーク部13cに着接又は接着し、鉄心12を先述の扇形スペースに係合部12bが永久磁石11に当接するまで嵌め込み、接着等の適宜の手段で支持部材13に固定することで、一体化された回転子1が構成される。   In the case of this example, the permanent magnet 11, the iron core 12, and the support member 13 attach or attach the permanent magnet 11 to the spoke portion 13 c, and the engaging portion 12 b abuts the permanent magnet 11 in the aforementioned fan-shaped space. The integrated rotor 1 is configured by being fitted to the support member 13 by appropriate means such as bonding and bonding.

このとき、鉄心12の係合部12bは、回転子周方向に張出す突起状に形成される。係合部12bが周方向に張出す突起状となっていることで、この突起が鉄心12に対して周方向に隣接する永久磁石11に軸方向に当接する。更に、鉄心12を図4(B)又は図4(C)のように回転子径方向に積層する構造を採る場合、各電磁鋼板を回転子半径方向に見て凸状に成型し、積層することで、容易に回転子周方向に張出す突起状の係合部を有する鉄心を製造することができる。   At this time, the engaging portion 12b of the iron core 12 is formed in a protruding shape protruding in the circumferential direction of the rotor. Since the engaging portion 12b has a protruding shape extending in the circumferential direction, the protruding portion comes into contact with the permanent magnet 11 adjacent to the iron core 12 in the circumferential direction in the axial direction. Furthermore, when the structure which laminates | stacks the iron core 12 in a rotor radial direction like FIG.4 (B) or FIG.4 (C) is taken, each electromagnetic steel plate is shape | molded and laminated | stacked convexly seeing in a rotor radial direction. Thus, it is possible to manufacture an iron core having a protrusion-like engagement portion that easily extends in the circumferential direction of the rotor.

この実施例2では、前記実施例1と同様の効果を達成することができる。そして、この実施例では、永久磁石11がスポーク部13cと鉄心12の係合部12bに挟み込まれる構造となるため、実施例1の構造に比べて、より強固かつ確実に永久磁石11を回転子支持部材13に固定できる利点が得られる。   In the second embodiment, the same effect as in the first embodiment can be achieved. In this embodiment, since the permanent magnet 11 is sandwiched between the spoke portion 13c and the engaging portion 12b of the iron core 12, the permanent magnet 11 is more firmly and securely compared to the structure of the first embodiment. The advantage that it can be fixed to the support member 13 is obtained.

本発明は、あらゆる用途のモータ、ジェネレータあるいはモータジェネレータに適用可能であるが、特に回転電機の軸線方向寸法が厳しく制約させる用途、例えば電機自動車においてホイールに内蔵されるホイルモータや、エンジン横置式のハイブリッド車用駆動装置におけるエンジンと同軸上又は平行軸上に配置されるモータ又はジェネレータに用いて特に有効なものである。   The present invention can be applied to a motor, a generator, or a motor generator for any application. However, in particular, an application in which the axial direction dimension of a rotating electrical machine is severely restricted, for example, a wheel motor built in a wheel in an electric vehicle, The present invention is particularly effective when used for a motor or a generator disposed on the same axis or parallel axis as the engine in the hybrid vehicle drive device.

本発明の適用に係る実施例1のダブルロータタイプのアキシャルギャップ回転電機の模式断面図である。1 is a schematic cross-sectional view of a double rotor type axial gap rotating electrical machine according to a first embodiment of the present invention. 前記回転電機の回転子の構成を示す分解斜視図である。It is a disassembled perspective view which shows the structure of the rotor of the said rotary electric machine. 前記回転電機の回転子の構成を示す部分断面図である。It is a fragmentary sectional view which shows the structure of the rotor of the said rotary electric machine. 回転子鉄心の各種積層構造を示す模式正面図である。It is a model front view which shows the various laminated structure of a rotor core. 実施例1の回転電機の変形例の構成を示す断面図である。It is sectional drawing which shows the structure of the modification of the rotary electric machine of Example 1. FIG. 実施例2の回転電機の構成を示す模式断面図である。6 is a schematic cross-sectional view showing a configuration of a rotating electrical machine of Example 2. FIG. 前記回転電機の回転子の構成を示す分解斜視図である。It is a disassembled perspective view which shows the structure of the rotor of the said rotary electric machine. 前記回転電機の回転子の構成を示す部分断面図である。It is a fragmentary sectional view which shows the structure of the rotor of the said rotary electric machine.

符号の説明Explanation of symbols

1 回転子
2 固定子
10 回転軸
11 永久磁石
12 鉄心
12a,12b 係合部
13 支持部材
13a ハブ部
13b 環状部
13c スポーク部
G 空隙
DESCRIPTION OF SYMBOLS 1 Rotor 2 Stator 10 Rotating shaft 11 Permanent magnet 12 Iron core 12a, 12b Engagement part 13 Support member 13a Hub part 13b Annular part 13c Spoke part G Gap

Claims (7)

永久磁石(11)と鉄心(12)を配置した回転子(1)と、該回転子の端面に軸線方向の空隙(G)を挟んで端面を対峙させた固定子(2)とを備えるアキシャルギャップ回転電機において、
前記回転子は、互いに分離した複数の前記鉄心を嵌め込み支持して回転軸(10)に連結する支持部材(13)を有し、
前記永久磁石は、磁極を回転子周方向に向けて、回転子周方向に鉄心の間で支持部材に着接され、
前記支持部材は、鉄心にかかる遠心力による飛散を防止すべく、外周を支持する環状部(13b)、及び前記回転軸に嵌め込まれるハブ部(13a)と前記環状部とをつなぐスポーク部(13c)を有し、
前記永久磁石は、スポーク部に沿わせて配置され、
前記鉄心は、ハブ部とスポーク部と環状部とで囲まれる空間に相互に離隔して配置されたことを特徴とするアキシャルギャップ回転電機
Axial comprising a rotor (1) in which a permanent magnet (11) and an iron core (12) are arranged, and a stator (2) whose end faces are opposed to each other with an axial gap (G) interposed between the end faces of the rotor. In gap rotating electrical machines,
The rotor has a support member (13) for fitting and supporting a plurality of the iron cores separated from each other and connecting to the rotation shaft (10),
The permanent magnet is attached to the support member between the iron cores in the rotor circumferential direction with the magnetic poles oriented in the rotor circumferential direction,
The support member includes an annular portion (13b) that supports the outer periphery and a spoke portion (13c) that connects the annular portion with the hub portion (13a) fitted to the rotating shaft in order to prevent scattering due to centrifugal force applied to the iron core. )
The permanent magnet is disposed along the spoke part,
The axial gap rotating electrical machine according to claim 1, wherein the iron cores are spaced apart from each other in a space surrounded by a hub portion, a spoke portion, and an annular portion .
記鉄心は、該鉄心に作用する前記固定子の吸引力による前記空隙を減少する方向への抜け出しを阻止すべく、前記支持部材が前記固定子と対峙する面の裏側において支持部材と当接する係合部(12a)を備えることを特徴とする請求項1記載のアキシャルギャップ回転電機。 Before SL core, in order to prevent the exit in the direction to reduce the gap by the suction force of said stator acting on heart iron, into contact with the support member in the back surface of the support member opposed to the stator the axial gap rotary electric machine of claim 1 Symbol mounting, characterized in that it comprises engaging portion (12a). 前記永久磁石は、前記スポーク部が前記固定子と対峙する面側に着接されたことを特徴とする、請求項記載のアキシャルギャップ回転電機。 The axial gap rotating electrical machine according to claim 2 , wherein the permanent magnet is attached to a surface side where the spoke portion faces the stator. 前記永久磁石は、前記スポーク部が前記固定子と対峙する面の裏側でスポーク部に着接され、
前記鉄心は、該鉄心に作用する前記固定子の吸引力による前記空隙を減少する方向への抜け出しを阻止すべく、前記永久磁石の前記スポーク部に着接した面の裏側に当接する係合部(12b)を備えることを特徴とする、請求項記載のアキシャルギャップ回転電機。
The permanent magnet is attached to the spoke part on the back side of the surface where the spoke part faces the stator,
The iron core has an engagement portion that contacts the back side of the surface of the permanent magnet that is in contact with the spoke portion so as to prevent the stator from acting in the iron core from pulling out in the direction of decreasing the gap due to the attractive force of the stator. characterized in that it comprises the (12b), axial gap rotary electric machine of claim 1, wherein.
前記鉄心の係合部は、鉄心から回転子周方向に張出す突起で構成されていることを特徴とする、請求項2、3又は4記載のアキシャルギャップ回転電機。 5. The axial gap rotating electrical machine according to claim 2 , wherein the engaging portion of the iron core is constituted by a protrusion protruding from the iron core in a circumferential direction of the rotor. 前記鉄心の係合部は、鉄心から回転子径方向に張出す突起で構成されていることを特徴とする、請求項2又は3記載のアキシャルギャップ回転電機。 The axial gap rotating electrical machine according to claim 2 or 3 , wherein the engaging portion of the iron core is constituted by a protrusion extending from the iron core in the rotor radial direction. 前記永久磁石は、前記回転子の径方向内側に向かって軸線方向の厚さを減じるものとされ、
前記支持部材のスポーク部は、回転子の径方向内側に向かって軸線方向の厚さを増すものとされていることを特徴とする、請求項1〜5のいずれか1項記載のアキシャルギャップ回転電機。
The permanent magnet reduces the thickness in the axial direction toward the radially inner side of the rotor,
The axial gap rotation according to any one of claims 1 to 5 , wherein the spoke portion of the support member increases in thickness in the axial direction toward a radially inner side of the rotor. Electric.
JP2004078259A 2004-03-03 2004-03-18 Axial gap rotating electric machine Expired - Fee Related JP4529500B2 (en)

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