JP2014155373A

JP2014155373A - Multi-gap rotary electric machine

Info

Publication number: JP2014155373A
Application number: JP2013024595A
Authority: JP
Inventors: Hidenori Kato; 秀紀加藤; Yasumasa Hanada; 康将花田
Original assignee: Denso Corp
Current assignee: Denso Corp
Priority date: 2013-02-12
Filing date: 2013-02-12
Publication date: 2014-08-25
Anticipated expiration: 2033-02-12
Also published as: JP6048191B2

Abstract

【課題】磁気回路の磁気抵抗を小さくでき、且つ、磁気飽和を抑制することによって出力密度を高めることが可能なマルチギャップ型モータ１を提供する。
【解決手段】ロータ３の軸方向両側にそれぞれエアギャップを介して対向配置される第１のステータ４と第２のステータ５は、ロータ３の極数と同数の磁極数を有し、且つ、ロータ３を挟んで互いの起磁力が対向関係にある。すなわち、第１のステータ４より発生する磁束ループと、第２のステータ５より発生する磁束ループとが互いに独立して並列に形成されるため、磁気回路の磁気抵抗が小さくなり、出力密度を高めることができる。また、ロータ鉄心３ａは、ステータ鉄心４ａ、５ａより外径が大きく、且つ、内径が小さく形成されるので、ロータ鉄心３ａの磁路断面積を増大できる。その結果、周方向に流れる磁束の通り道を確保でき、ロータ鉄心３ａの磁気飽和を抑制できる。
【選択図】図１A multi-gap motor (1) that can reduce the magnetic resistance of a magnetic circuit and increase the output density by suppressing magnetic saturation.
A first stator 4 and a second stator 5 that are opposed to each other on both sides in the axial direction of a rotor 3 via air gaps have the same number of magnetic poles as the number of poles of the rotor 3, and The magnetomotive forces of the rotors 3 are opposed to each other with the rotor 3 interposed therebetween. That is, since the magnetic flux loop generated from the first stator 4 and the magnetic flux loop generated from the second stator 5 are formed in parallel independently of each other, the magnetic resistance of the magnetic circuit is reduced and the output density is increased. be able to. Moreover, since the rotor core 3a is formed with a larger outer diameter and a smaller inner diameter than the stator cores 4a and 5a, the magnetic path cross-sectional area of the rotor core 3a can be increased. As a result, a path for magnetic flux flowing in the circumferential direction can be secured, and magnetic saturation of the rotor core 3a can be suppressed.
[Selection] Figure 1

Description

本発明は、産業用および自動車用などの様々な用途に適用可能であり、とりわけ、ハイブリッド自動車の走行用モータに用いて好適なマルチギャップ型回転電機に関する。 The present invention is applicable to various uses such as industrial use and automobile use, and particularly relates to a multi-gap type rotating electrical machine suitable for use in a running motor of a hybrid car.

従来、円盤状のロータとステータとを軸方向に対向配置して構成されるアキシャル型回転電機が知られている。例えば、特許文献１に開示されたアキシャル型回転電機は、回転軸に固定された円盤状のロータと、このロータの軸方向両側にそれぞれエアギャップを介して配置される一組の円環状ステータとを有して構成される。
ロータは、内部に永久磁石を埋設した永久磁石型ロータである。永久磁石は、ロータの周方向に等間隔に埋設されて軸方向に着磁され、且つ、同一平面上の極性が周方向で交互に異なる配置、つまり「Ｓ極」と「Ｎ極」とが交互に配置されている。
ステータは、ステータ鉄心に形成されたスロットを通ってステータ巻線が集中巻され、インバータよりステータ巻線に交流が印加されることで回転磁界を生成する。 2. Description of the Related Art Conventionally, there is known an axial type rotating electric machine configured by arranging a disk-shaped rotor and a stator so as to face each other in the axial direction. For example, an axial type rotating electrical machine disclosed in Patent Document 1 includes a disk-shaped rotor fixed to a rotating shaft, and a pair of annular stators that are respectively disposed on both sides in the axial direction of the rotor via air gaps. It is comprised.
The rotor is a permanent magnet type rotor having a permanent magnet embedded therein. Permanent magnets are embedded in the circumferential direction of the rotor at equal intervals and magnetized in the axial direction, and the polarities on the same plane are alternately different in the circumferential direction, that is, “S pole” and “N pole”. Alternatingly arranged.
In the stator, the stator winding is concentratedly wound through a slot formed in the stator core, and an alternating current is applied to the stator winding from the inverter to generate a rotating magnetic field.

特開２００５−９４９５５号公報JP 2005-94955 A

ところが、特許文献１の従来技術では、以下の理由によって出力密度を高めることが出来ない問題がある。
ａ）１極対の磁束ループに関して言えば、二つのステータと、四つの空隙（エアギャップ）を通る必要があるため、その磁路長が長くなって磁気抵抗が大きくなる。
ｂ）磁気抵抗が大きいことに起因して、所望の磁束を通過させるのに強力な起磁力を持つ磁石を配置する必要があり、且つ、二つのステータからの減磁界に耐え得る磁石が必要となるため、高価になる。
ｃ）ステータ巻線が短節巻であるため、ロータの磁極ピッチとステータ巻線が作る磁界の磁極ピッチが一致せず、リラクタンストルクを十分活用できない。
本発明は、上記事情に基づいて成されたもので、その目的は、磁気回路の磁気抵抗を小さくでき、且つ、磁気飽和を抑制することによって出力密度を高めることが可能な回転電機を提供することにある。 However, the conventional technique of Patent Document 1 has a problem that the output density cannot be increased for the following reason.
a) Regarding the magnetic flux loop of one pole pair, since it is necessary to pass through two stators and four air gaps (air gaps), the magnetic path length is increased and the magnetic resistance is increased.
b) Due to the large magnetic resistance, it is necessary to arrange a magnet having a strong magnetomotive force to pass a desired magnetic flux, and a magnet capable of withstanding the demagnetizing field from the two stators is required. Therefore, it becomes expensive.
c) Since the stator winding is a short-pitch winding, the magnetic pole pitch of the rotor and the magnetic pole pitch of the magnetic field produced by the stator winding do not match, and the reluctance torque cannot be fully utilized.
The present invention has been made based on the above circumstances, and an object thereof is to provide a rotating electrical machine capable of reducing the magnetic resistance of a magnetic circuit and increasing the output density by suppressing magnetic saturation. There is.

（請求項１に係る発明）
本発明のマルチギャップ型回転電機は、回転軸と直交して配置される円盤状のロータ鉄心を有するロータと、このロータの軸方向両側にそれぞれエアギャップを介して配置される二つのステータ鉄心を有し、この二つのステータ鉄心にそれぞれステータ巻線を巻装して構成される第１、第２のステータとを備え、その第１、第２のステータは、それぞれロータの極数と同数の磁極数を有し、且つ、ロータを挟んで軸方向に対向する互いの磁極同士が同一極性となるように起磁力を発生する。 (Invention according to Claim 1)
A multi-gap rotating electric machine according to the present invention includes a rotor having a disk-shaped rotor core disposed perpendicular to a rotation axis, and two stator cores disposed on both sides in the axial direction of the rotor via air gaps. And the first and second stators each having a stator winding wound around the two stator cores, the first and second stators having the same number as the number of poles of the rotor. Magnetomotive force is generated so that the magnetic poles having the number of magnetic poles and facing each other in the axial direction across the rotor have the same polarity.

また、ロータ鉄心とステータ鉄心は、ロータ鉄心の内径がステータ鉄心の内径以下であり、且つロータ鉄心の外径がステータ鉄心の外径より大きい寸法関係を条件（Ａ）、ロータ鉄心の外径がステータ鉄心の外径以上であり、且つロータ鉄心の内径がステータ鉄心の内径より小さい寸法関係を条件（Ｂ）、ロータ鉄心の外径がステータ鉄心の外径より大きく、且つロータ鉄心の内径がステータ鉄心の内径より小さい寸法関係を条件（Ｃ）と定義した時に、条件（Ａ）、条件（Ｂ）、条件（Ｃ）のいずれか一つの条件を満たしていることを特徴とする。 Further, the rotor core and the stator core have a condition (A) in which the inner diameter of the rotor core is equal to or smaller than the inner diameter of the stator core and the outer diameter of the rotor core is larger than the outer diameter of the stator core. The condition (B) is that the outer diameter of the stator core is greater than the outer diameter of the stator core and the inner diameter of the rotor core is smaller than the inner diameter of the stator core, the outer diameter of the rotor core is larger than the outer diameter of the stator core, and the inner diameter of the rotor core is When a dimensional relationship smaller than the inner diameter of the iron core is defined as the condition (C), one of the conditions (A), (B), and (C) is satisfied.

上記の構成によれば、第１のステータの起磁力と第２のステータの起磁力とがロータを挟んで対向関係にあるので、第１のステータより発生する磁束ループと、第２のステータより発生する磁束ループとが互いに独立して並列に形成される。この場合、一つの磁束ループに関して言えば、磁束が通過するエアギャップが二箇所となるため、先の特許文献１に開示された従来技術と比較すると、磁気回路の磁気抵抗が小さくなる。その結果、出力密度を高めることが可能である。 According to the above configuration, the magnetomotive force of the first stator and the magnetomotive force of the second stator are opposed to each other across the rotor, so that the magnetic flux loop generated from the first stator and the second stator The generated magnetic flux loops are formed in parallel independently of each other. In this case, with respect to one magnetic flux loop, since there are two air gaps through which the magnetic flux passes, the magnetic resistance of the magnetic circuit is reduced as compared with the prior art disclosed in the aforementioned Patent Document 1. As a result, the output density can be increased.

また、ロータは、ステータと比較して径方向にスペースがある。すなわち、ステータは、径方向の内外にステータ巻線のコイルエンドが存在するため、そのコイルエンドの高さ分だけ、ロータの径方向寸法を大きくすることができる。具体的には、（Ａ）ロータ鉄心の外径をステータ鉄心の外径より大きくする。（Ｂ）ロータ鉄心の内径をステータ鉄心の内径より大きくする。（Ｃ）ロータ鉄心の外径をステータ鉄心の外径より大きくし、且つ、ロータ鉄心の内径をステータ鉄心の内径より大きくする。つまり、請求項１に記載した条件（Ａ）〜（Ｃ）のうち、いずれか一つの条件を満たすことで、ロータ鉄心の磁路断面積を増大することができる。その結果、周方向に流れる磁束の通り道をより多く確保することができるので、磁気飽和を抑制でき、出力密度を高めることに寄与する。 Further, the rotor has a space in the radial direction as compared with the stator. That is, since the stator has the coil ends of the stator windings in the radial direction inside and outside, the radial dimension of the rotor can be increased by the height of the coil ends. Specifically, (A) the outer diameter of the rotor core is made larger than the outer diameter of the stator core. (B) The inner diameter of the rotor core is made larger than the inner diameter of the stator core. (C) The outer diameter of the rotor core is made larger than the outer diameter of the stator core, and the inner diameter of the rotor core is made larger than the inner diameter of the stator core. That is, the magnetic path cross-sectional area of the rotor core can be increased by satisfying any one of the conditions (A) to (C) described in claim 1. As a result, more paths for the magnetic flux flowing in the circumferential direction can be secured, so that magnetic saturation can be suppressed and the output density can be increased.

（請求項９に係る発明）
本発明は、回転軸と直交して配置される円盤状のロータと、このロータの軸方向両側にそれぞれエアギャップを介して配置される第１、第２のステータと、ロータの径方向外側にエアギャップを介して配置される第３のステータとを備え、第１、第２、および第３のステータは、互いのステータ鉄心が連結されて一体に設けられ、そのステータ鉄心にステータ巻線を巻装して構成されるマルチギャップ型回転電機であって、第１、第２、および第３のステータは、それぞれロータの極数と同数の磁極数を有すると共に、第１、第２のステータは、ロータを挟んで軸方向に対向する互いの磁極同士が同一極性となるように起磁力を発生し、ロータ鉄心の内径がステータ鉄心の内径より小さく形成されていることを特徴とする。 (Invention according to claim 9)
The present invention includes a disk-shaped rotor disposed orthogonal to the rotation axis, first and second stators disposed on both sides of the rotor in the axial direction via air gaps, and radially outward of the rotor. A third stator disposed through an air gap, and the first, second, and third stators are integrally provided by connecting the stator iron cores to each other, and stator windings are provided on the stator iron cores. A multi-gap rotating electrical machine configured by winding, wherein the first, second, and third stators have the same number of magnetic poles as the number of poles of the rotor, and the first and second stators Is characterized in that magnetomotive force is generated so that the magnetic poles facing each other in the axial direction across the rotor have the same polarity, and the inner diameter of the rotor core is smaller than the inner diameter of the stator core.

上記の構成によれば、第１のステータの起磁力と第２のステータの起磁力とがロータを挟んで対向関係にあるので、第１のステータより発生する磁束ループと、第２のステータより発生する磁束ループとが互いに独立して並列に形成される。この場合、一つの磁束ループに関して言えば、磁束が通過するエアギャップが二箇所となるため、先の特許文献１に開示された従来技術と比較すると、磁気回路の磁気抵抗が小さくなる。その結果、出力密度を高めることが可能である。
また、ロータ鉄心の内径がステータ鉄心の内径より小さく形成されているので、ロータ鉄心の内径側の磁路断面積を増大することができる。その結果、周方向に流れる磁束の通り道をより多く確保することができるので、磁気飽和を抑制でき、出力密度を高めることに寄与する。 According to the above configuration, the magnetomotive force of the first stator and the magnetomotive force of the second stator are opposed to each other across the rotor, so that the magnetic flux loop generated from the first stator and the second stator The generated magnetic flux loops are formed in parallel independently of each other. In this case, with respect to one magnetic flux loop, since there are two air gaps through which the magnetic flux passes, the magnetic resistance of the magnetic circuit is reduced as compared with the prior art disclosed in the aforementioned Patent Document 1. As a result, the output density can be increased.
In addition, since the inner diameter of the rotor core is smaller than the inner diameter of the stator core, the magnetic path cross-sectional area on the inner diameter side of the rotor core can be increased. As a result, more paths for the magnetic flux flowing in the circumferential direction can be secured, so that magnetic saturation can be suppressed and the output density can be increased.

さらに、請求項９に記載した回転電機は、ロータの径方向外側に第３のステータを配置しているので、ロータの外周面にも力の作用点が生まれる。また、第１、第２、および第３のステータは、互いのステータ鉄心が連結されて一体に設けられ、そのステータ鉄心にステータ巻線を巻装している。この場合、ステータ巻線のコイルエンドが第１、第２のステータの内径側だけに存在する、言い換えると、外径側のコイルエンドが無くなる。上記のように、ロータの径方向外側に第３のステータを配置することで、より出力密度を高めることができる。 Furthermore, in the rotary electric machine according to the ninth aspect, since the third stator is arranged on the outer side in the radial direction of the rotor, a point of action of force is also generated on the outer peripheral surface of the rotor. Further, the first, second, and third stators are integrally provided by connecting the stator iron cores to each other, and stator windings are wound around the stator iron cores. In this case, the coil end of the stator winding exists only on the inner diameter side of the first and second stators, in other words, the coil end on the outer diameter side is eliminated. As described above, the power density can be further increased by arranging the third stator on the radially outer side of the rotor.

実施例１に係るモータの断面図である。1 is a sectional view of a motor according to Embodiment 1. FIG. 実施例１に係る磁束の流れ（磁束ループ）を示すモータの断面図である。It is sectional drawing of the motor which shows the flow (magnetic flux loop) of the magnetic flux which concerns on Example 1. FIG. 実施例２に係る磁束の流れ（磁束ループ）を示すモータの断面図である。It is sectional drawing of the motor which shows the flow (magnetic flux loop) of the magnetic flux which concerns on Example 2. FIG. （ａ）実施例２に係るロータの平面図、（ｂ）同図（ａ）に示すロータのＩＶ−ＩＶ断面図である。(A) The top view of the rotor which concerns on Example 2, (b) It is IV-IV sectional drawing of the rotor shown to the same figure (a). （ａ）実施例３に係るロータの平面図、（ｂ）同図（ａ）に示すロータのＶ−Ｖ断面図である。(A) The top view of the rotor which concerns on Example 3, (b) It is VV sectional drawing of the rotor shown to the same figure (a). （ａ）実施例４に係るロータの平面図、（ｂ）同図（ａ）に示すロータのＶＩ−ＶＩ断面図である。(A) The top view of the rotor which concerns on Example 4, (b) It is VI-VI sectional drawing of the rotor shown to the same figure (a). 実施例５に係るモータの断面図である。FIG. 10 is a cross-sectional view of a motor according to a fifth embodiment. （ａ）実施例６に係るステータ内径側のコイルエンドを軸方向から見た図、（ｂ）同コイルエンドを内径側から見た図である。(A) The figure which looked at the coil end by the side of the stator inner diameter which concerns on Example 6 from the axial direction, (b) The figure which looked at the coil end from the inner diameter side. 実施例６に係るステータの側面図である。FIG. 10 is a side view of a stator according to Example 6. （ａ）従来技術に係るステータ内径側のコイルエンドを軸方向から見た図、（ｂ）同コイルエンドを内径側から見た図である。(A) The figure which looked at the coil end of the stator inner diameter side concerning a prior art from the axial direction, (b) The figure which looked at the coil end from the inner diameter side. 従来技術に係るステータの側面図である。It is a side view of the stator which concerns on a prior art.

本発明を実施するための形態を以下の実施例により詳細に説明する。 The mode for carrying out the present invention will be described in detail with reference to the following examples.

（実施例１）
実施例１では、本発明のマルチギャップ型回転電機をアキシャルギャップ型モータに適用した事例を説明する。
同モータ１は、図１に示す様に、シャフト２の外周に嵌合してシャフト２と一体に回転する円盤状のロータ３と、このロータ３の軸方向両側にそれぞれエアギャップを介して対向配置される第１のステータ４と第２のステータ５とを備える。
シャフト２は、一組のベアリング６を介してモータハウジング７に回転自在に支持されている。
ロータ３は、例えば、ロータ鉄心３ａの両側面（ステータとの対向面）にそれぞれ突極構造を有する突極型ロータである。 Example 1
In Example 1, an example in which the multi-gap type rotating electrical machine of the present invention is applied to an axial gap type motor will be described.
As shown in FIG. 1, the motor 1 is opposed to a disk-shaped rotor 3 that fits on the outer periphery of a shaft 2 and rotates integrally with the shaft 2, and faces both axial sides of the rotor 3 via air gaps. A first stator 4 and a second stator 5 are provided.
The shaft 2 is rotatably supported by the motor housing 7 via a set of bearings 6.
The rotor 3 is, for example, a salient pole type rotor having salient pole structures on both side surfaces (surfaces facing the stator) of the rotor core 3a.

第１のステータ４と第２のステータ５は、それぞれ径方向の中央部が開口する円環状のステータ鉄心４ａ、５ａと、このステータ鉄心４ａ、５ａに巻装されるステータ巻線４ｂ、５ｂとで構成され、ステータ鉄心４ａ、５ａの反ロータ側端面がモータハウジング７に固定されている。
ステータ鉄心４ａ、５ａは、ロータ３との対向面に複数のスロット（図示せず）が周方向等ピッチに形成され、周方向に隣り合うスロット同士の間に半径方向に沿って放射状に延びるティース（図示せず）が設けられている。
ステータ巻線４ｂ、５ｂは、例えば、スター結線された三相コイルをステータ鉄心４ａ、５ａに全節巻すると共に、第１のステータ４と第２のステータ５の各相コイル同士が直列に接続されて、三相端子が図示しないインバータに接続される。 The first stator 4 and the second stator 5 each have an annular stator core 4a, 5a opened in the radial center, and stator windings 4b, 5b wound around the stator core 4a, 5a. The stator rotor cores 4a and 5a are fixed to the motor housing 7 at their opposite end faces on the rotor side.
The stator cores 4a and 5a have teeth (not shown) formed on the surface facing the rotor 3 at equal pitches in the circumferential direction, and radially extend along the radial direction between slots adjacent in the circumferential direction. (Not shown) is provided.
The stator windings 4b and 5b are, for example, a star-connected three-phase coil wound around the stator iron cores 4a and 5a, and the phase coils of the first stator 4 and the second stator 5 are connected in series. Thus, the three-phase terminals are connected to an inverter (not shown).

続いて、請求項１に係る本発明の特徴を説明する。
第１のステータ４と第２のステータ５は、それぞれロータ３の極数と同数の磁極数を有し、且つ、互いのステータ巻線４ｂ、５ｂにインバータより三相交流が供給されると、周方向の同位置でロータ３を挟んで軸方向に対向する互いの磁極同士が同一極性となるように起磁力を発生する。すなわち、ロータ３を挟んで互いの起磁力が対向関係にある。
また、ロータ鉄心３ａとステータ鉄心４ａ、５ａとの寸法関係は、以下に記載する条件（Ａ）、条件（Ｂ）、条件（Ｃ）のいずれか一つの条件を満たしている。なお、両ステータ鉄心４ａ、５ａの内径および外径は同一寸法である。 Next, features of the present invention according to claim 1 will be described.
When the first stator 4 and the second stator 5 have the same number of magnetic poles as the number of poles of the rotor 3 and three-phase alternating current is supplied to the stator windings 4b and 5b from the inverter, Magnetomotive force is generated so that the magnetic poles facing each other in the axial direction across the rotor 3 at the same position in the circumferential direction have the same polarity. That is, the magnetomotive forces of the rotors 3 are opposed to each other across the rotor 3.
The dimensional relationship between the rotor core 3a and the stator cores 4a and 5a satisfies any one of the following conditions (A), (B), and (C). The stator cores 4a and 5a have the same inner diameter and outer diameter.

条件（Ａ）…ロータ鉄心３ａの内径がステータ鉄心４ａ、５ａの内径以下であり、且つロータ鉄心３ａの外径がステータ鉄心４ａ、５ａの外径より大きい。
条件（Ｂ）…ロータ鉄心３ａの外径がステータ鉄心４ａ、５ａの外径以上であり、且つロータ鉄心３ａの内径がステータ鉄心４ａ、５ａの内径より小さい。
条件（Ｃ）…ロータ鉄心３ａの外径がステータ鉄心４ａ、５ａの外径より大きく、且つロータ鉄心３ａの内径がステータ鉄心４ａ、５ａの内径より小さい。
図１に示す実施例１のモータ１は、条件（Ｃ）を満たす事例である。 Condition (A): The inner diameter of the rotor core 3a is equal to or smaller than the inner diameter of the stator cores 4a, 5a, and the outer diameter of the rotor core 3a is larger than the outer diameter of the stator cores 4a, 5a.
Condition (B): The outer diameter of the rotor core 3a is equal to or larger than the outer diameter of the stator cores 4a, 5a, and the inner diameter of the rotor core 3a is smaller than the inner diameter of the stator cores 4a, 5a.
Condition (C): The outer diameter of the rotor core 3a is larger than the outer diameter of the stator cores 4a, 5a, and the inner diameter of the rotor core 3a is smaller than the inner diameter of the stator cores 4a, 5a.
The motor 1 of Example 1 shown in FIG. 1 is an example that satisfies the condition (C).

（実施例１の作用および効果）
実施例１のモータ１は、第１のステータ４の起磁力と第２のステータ５の起磁力とがロータ３を挟んで対向関係にある。すなわち、図２に示す様に、第１のステータ４より発生する磁束ループと、第２のステータ５より発生する磁束ループとが互いに独立して並列に形成される。この場合、一つの磁束ループに関して言えば、磁束が通過するエアギャップが二箇所となるため、先の特許文献１に開示された従来技術と比較すると、磁気回路の磁気抵抗が小さくなる。その結果、出力密度を高めることが可能である。
また、実施例１のモータ１は、第１のステータ４および第２のステータ５において、ステータ巻線４ｂ、５ｂが全節巻されるので、ステータ巻線４ｂ、５ｂが作る磁界の磁極ピッチとロータ３の磁極ピッチとが一致することにより、リラクタンストルクを十分に活用できる。 (Operation and Effect of Example 1)
In the motor 1 according to the first embodiment, the magnetomotive force of the first stator 4 and the magnetomotive force of the second stator 5 are opposed to each other with the rotor 3 interposed therebetween. That is, as shown in FIG. 2, the magnetic flux loop generated from the first stator 4 and the magnetic flux loop generated from the second stator 5 are formed in parallel independently of each other. In this case, with respect to one magnetic flux loop, since there are two air gaps through which the magnetic flux passes, the magnetic resistance of the magnetic circuit is reduced as compared with the prior art disclosed in the aforementioned Patent Document 1. As a result, the output density can be increased.
Further, in the motor 1 of the first embodiment, since the stator windings 4b and 5b are entirely wound in the first stator 4 and the second stator 5, the magnetic pole pitch of the magnetic field formed by the stator windings 4b and 5b By matching the magnetic pole pitch of the rotor 3, the reluctance torque can be fully utilized.

さらに、第１のステータ４および第２のステータ５は、それぞれ径方向の内外にステータ巻線４ｂ、５ｂのコイルエンドが存在するため、そのコイルエンドの高さ分だけ、ロータ３の径方向寸法を大きくすることが可能である。そこで、実施例１のロータ３は、ロータ鉄心３ａの外径がステータ鉄心４ａ、５ａの外径より大きく、且つロータ鉄心３ａの内径がステータ鉄心４ａ、５ａの内径より小さく形成される。つまり、上記の条件（Ｃ）を満たしている。これにより、ロータ鉄心３ａの内径側および外径側の両方で共に磁路断面積を増大できるので、周方向に流れる磁束の通り道をより多く確保できる。その結果、ロータ鉄心３ａの磁気飽和を抑制でき、出力密度を高めることに寄与する。 Furthermore, since the first stator 4 and the second stator 5 have coil ends of the stator windings 4b and 5b inside and outside in the radial direction, the radial dimension of the rotor 3 is equal to the height of the coil ends. Can be increased. Therefore, in the rotor 3 according to the first embodiment, the outer diameter of the rotor core 3a is larger than the outer diameter of the stator cores 4a and 5a, and the inner diameter of the rotor core 3a is smaller than the inner diameter of the stator cores 4a and 5a. That is, the above condition (C) is satisfied. Thereby, since both the inner diameter side and the outer diameter side of the rotor core 3a can increase the magnetic path cross-sectional area, it is possible to secure more paths for the magnetic flux flowing in the circumferential direction. As a result, magnetic saturation of the rotor core 3a can be suppressed, which contributes to increasing the output density.

以下、本発明に係る他の実施例（実施例２〜６）を説明する。
実施例１と同一名称を使用する部品、機能、形状等については、実施例１と同一番号を付与し、重複する説明は省略する。
（実施例２）
この実施例２は、図４に示す様に、ロータ鉄心３ａに永久磁石８を埋設した永久磁石型ロータ３を使用した事例であり、第１のステータ４および第２のステータ５の構成は実施例１と同じである。なお、以下の説明では、第１のステータ４に対向するロータ鉄心３ａの軸方向一端側の表面を第１ロータ表面と呼び、第２のステータ５に対向するロータ鉄心３ａの軸方向他端側の表面を第２ロータ表面と呼ぶ。 Hereinafter, other examples (Examples 2 to 6) according to the present invention will be described.
Parts, functions, shapes, and the like that use the same names as in the first embodiment are assigned the same numbers as in the first embodiment, and duplicate descriptions are omitted.
(Example 2)
As shown in FIG. 4, the second embodiment is an example in which a permanent magnet type rotor 3 in which a permanent magnet 8 is embedded in a rotor core 3a is used, and the configurations of the first stator 4 and the second stator 5 are implemented. Same as Example 1. In the following description, the surface on one end side in the axial direction of the rotor core 3 a facing the first stator 4 is referred to as the first rotor surface, and the other end side in the axial direction of the rotor core 3 a facing the second stator 5. Is called the second rotor surface.

ロータ３は、図４に示す様に、ロータ鉄心３ａの軸方向に所定の間隔を隔てて第１ロータ表面側と第２ロータ表面側とにそれぞれ同一の極対数（図４では４極対）を有する複数の永久磁石８が埋設される。ここで、第１ロータ表面側に埋設される永久磁石８を第１磁石８ａと呼び、第２ロータ表面側に埋設される永久磁石８を第２磁石８ｂと呼ぶ。
第１磁石８ａと第２磁石８ｂは、図４（ａ）に示す様に、それぞれ周方向に一定の間隔を有して配置され、且つ、互いの周方向位置が同一となる様に配置される。 As shown in FIG. 4, the rotor 3 has the same number of pole pairs on the first rotor surface side and the second rotor surface side with a predetermined interval in the axial direction of the rotor iron core 3 a (four pole pairs in FIG. 4). A plurality of permanent magnets 8 are embedded. Here, the permanent magnet 8 embedded on the first rotor surface side is referred to as a first magnet 8a, and the permanent magnet 8 embedded on the second rotor surface side is referred to as a second magnet 8b.
As shown in FIG. 4A, the first magnet 8a and the second magnet 8b are arranged with a certain interval in the circumferential direction, and are arranged so that their circumferential positions are the same. The

この第１磁石８ａと第２磁石８ｂは、図４（ｂ）に示す様に、それぞれ軸方向に着磁されると共に、軸方向に対向する互いの磁極が同一極性を有し、且つ、同図（ａ）に示す様に、周方向に隣り合う磁石同士の極性が異なる。すなわち、複数の第１磁石８ａおよび複数の第２磁石８ｂは、それぞれ、第１ロータ表面側および第２ロータ表面側の極性が周方向に交互に「Ｓ極」と「Ｎ極」とが配置される。
なお、第１磁石８ａおよび第２磁石８ｂは、図４（ｂ）に示す様に、それぞれ軸方向外側の磁極面が第１ロータ表面および第２ロータ表面に露出した状態でロータ鉄心３ａに埋設される、いわゆるインセット型と呼ばれる構造を採用している。本出願の請求項６では、「埋設」という表現を使用しているが、この実施例２では、上記のインセット型も含めて「埋設」と定義する。 As shown in FIG. 4B, each of the first magnet 8a and the second magnet 8b is magnetized in the axial direction, and the magnetic poles facing each other in the axial direction have the same polarity, and the same As shown in the figure (a), the polarities of magnets adjacent in the circumferential direction are different. That is, the plurality of first magnets 8a and the plurality of second magnets 8b are arranged such that the polarities on the first rotor surface side and the second rotor surface side are alternately “S pole” and “N pole” in the circumferential direction. Is done.
As shown in FIG. 4 (b), the first magnet 8a and the second magnet 8b are embedded in the rotor core 3a with the axially outer magnetic pole surfaces exposed on the first rotor surface and the second rotor surface, respectively. The so-called inset type structure is adopted. In claim 6 of the present application, the expression “buried” is used, but in the second embodiment, it is defined as “buried” including the above inset type.

この実施例２のモータ１は、ロータ鉄心３ａに永久磁石８を埋設しているので、リラクタンストルクに加えて永久磁石８によるマグネットトルクを利用できる。特に、第１磁石８ａと第２磁石８ｂは、ロータ鉄心３ａの軸方向に所定の間隔を隔てて配置される、つまり、第１磁石８ａと第２磁石８ｂとの間に磁束の通り道が確保されている。これにより、第１磁石８ａと第２磁石８ｂとの間をロータ鉄心３ａの周方向に磁束が通ることができるため、図３に示す様に、第１のステータ４により発生する磁束ループと第２のステータ５より発生する磁束ループの形成を阻害することなく、出力密度を高めることができる。 In the motor 1 according to the second embodiment, the permanent magnet 8 is embedded in the rotor core 3a, so that the magnet torque generated by the permanent magnet 8 can be used in addition to the reluctance torque. In particular, the first magnet 8a and the second magnet 8b are arranged at a predetermined interval in the axial direction of the rotor core 3a, that is, a path for magnetic flux is secured between the first magnet 8a and the second magnet 8b. Has been. As a result, magnetic flux can pass between the first magnet 8a and the second magnet 8b in the circumferential direction of the rotor core 3a. Therefore, as shown in FIG. The output density can be increased without hindering the formation of a magnetic flux loop generated from the second stator 5.

（実施例３）
この実施例３は、ロータ鉄心３ａに永久磁石８を埋設した他の第１事例である。
ロータ鉄心３ａには、実施例２と同様に、軸方向に所定の間隔を隔てて第１ロータ表面側と第２ロータ表面側とにそれぞれ同一の極対数を有する複数の永久磁石８が埋設される〔図５（ｂ）参照〕。実施例２と異なる点は、図５（ａ）に示す様に、第１ロータ表面側に埋設される第１磁石８ａおよび第２ロータ表面側に埋設される第２磁石８ｂがそれぞれ周方向に着磁されていることである。 Example 3
The third embodiment is another first case in which the permanent magnet 8 is embedded in the rotor core 3a.
In the rotor core 3a, as in the second embodiment, a plurality of permanent magnets 8 having the same number of pole pairs are embedded on the first rotor surface side and the second rotor surface side with a predetermined interval in the axial direction. [See FIG. 5 (b)]. The difference from the second embodiment is that, as shown in FIG. 5A, the first magnet 8a embedded on the first rotor surface side and the second magnet 8b embedded on the second rotor surface side are respectively in the circumferential direction. It is magnetized.

また、第１磁石８ａと第２磁石８ｂは、周方向に隣り合う磁石同士で周方向に対向する互いの磁極が同一極性であり、且つ、周方向の同位置に配置される磁石同士は、周方向の極性が互いに同一である。
この実施例３では、第１磁石８ａおよび第２磁石８ｂが周方向に着磁され、且つ、周方向に対向する磁石同士の磁極が同一極性であるため、ロータ鉄心３ａの漏れ磁束を低減でき、高効率化を図ることが可能である。また、第１磁石８ａおよび第２磁石８ｂが周方向に着磁されることで、第１のステータ４および第２のステータ５からの反磁界を受ける力を弱められるため、減磁に耐え得る強力な磁石を大量に使用する必要がなく、コストを低く抑えることができる。 In addition, the first magnet 8a and the second magnet 8b are magnets adjacent to each other in the circumferential direction, the magnetic poles facing each other in the circumferential direction have the same polarity, and the magnets arranged at the same position in the circumferential direction are: The circumferential polarities are the same.
In the third embodiment, the first magnet 8a and the second magnet 8b are magnetized in the circumferential direction, and the magnetic poles of the magnets facing each other in the circumferential direction have the same polarity, so that the leakage magnetic flux of the rotor core 3a can be reduced. It is possible to improve efficiency. Further, since the first magnet 8a and the second magnet 8b are magnetized in the circumferential direction, the force that receives the demagnetizing field from the first stator 4 and the second stator 5 can be weakened, so that it can withstand demagnetization. There is no need to use a large amount of powerful magnets, and the cost can be kept low.

（実施例４）
この実施例４は、ロータ鉄心３ａに永久磁石８を埋設した他の第２事例である。
ロータ鉄心３ａには、実施例２と同様に、軸方向に所定の間隔を隔てて第１ロータ表面側と第２ロータ表面側とにそれぞれ同一の極対数を有する複数の永久磁石８が埋設される〔図６（ｂ）参照〕。
以下、実施例２と異なる点を説明する。
この実施例４に示すロータ３は、図６（ａ）に示す様に、周方向に隣り合う第１磁石８ａ同士の間および第２磁石８ｂ同士の間に非磁性領域９が形成されている。非磁性領域９として、ロータ鉄心３ａに空間を形成しても良いが、例えば、紙や樹脂あるいはアルミニウム等によって非磁性領域９を形成することもできる。 Example 4
This Example 4 is another second example in which the permanent magnet 8 is embedded in the rotor core 3a.
In the rotor core 3a, as in the second embodiment, a plurality of permanent magnets 8 having the same number of pole pairs are embedded on the first rotor surface side and the second rotor surface side with a predetermined interval in the axial direction. [See FIG. 6B].
Hereinafter, differences from the second embodiment will be described.
In the rotor 3 according to the fourth embodiment, as shown in FIG. 6A, nonmagnetic regions 9 are formed between the first magnets 8a adjacent in the circumferential direction and between the second magnets 8b. . As the nonmagnetic region 9, a space may be formed in the rotor core 3a, but the nonmagnetic region 9 may be formed of, for example, paper, resin, aluminum, or the like.

第１磁石８ａと第２磁石８ｂは、それぞれロータ鉄心３ａの半径方向に所定の間隔を隔てて内径側に配置される内側磁石８ａｉ、８ｂｉと外径側に配置される外側磁石８ａｏ、８ｂｏとを有している。その内側磁石８ａｉ、８ｂｉと外側磁石８ａｏ、８ｂｏは、図６（ａ）に示す様に、それぞれ径方向に着磁されると共に、その径方向に対向する互いの磁極が同一極性である。また、第１ロータ表面側と第２ロータ表面側とで周方向の同位置に配置される内側磁石８ａｉ、８ｂｉ同士および外側磁石８ａｏ、８ｂｏ同士は、それぞれ径方向の極性が同一である。
この実施例４の構成においても、ロータ鉄心３ａの内径側と外径側とに内側磁石８ａｉ、８ｂｉと外側磁石８ａｏ、８ｂｏを配置し、且つ、その内側磁石８ａｉ、８ｂｉおよび外側磁石８ａｏ、８ｂｏの周方向両側に非磁性領域９を設けているので、実施例３と同様に、ロータ鉄心３ａの漏れ磁束を低減でき、高効率化を図ることが可能である。 The first magnet 8a and the second magnet 8b are respectively composed of inner magnets 8ai and 8bi arranged on the inner diameter side at a predetermined interval in the radial direction of the rotor core 3a and outer magnets 8ao and 8bo arranged on the outer diameter side. have. As shown in FIG. 6A, the inner magnets 8ai and 8bi and the outer magnets 8ao and 8bo are each magnetized in the radial direction, and the magnetic poles facing each other in the radial direction have the same polarity. In addition, the inner magnets 8ai and 8bi and the outer magnets 8ao and 8bo arranged at the same circumferential position on the first rotor surface side and the second rotor surface side have the same radial polarity.
Also in the configuration of the fourth embodiment, the inner magnets 8ai and 8bi and the outer magnets 8ao and 8bo are arranged on the inner diameter side and the outer diameter side of the rotor core 3a, and the inner magnets 8ai and 8bi and the outer magnets 8ao and 8bo are arranged. Since the nonmagnetic regions 9 are provided on both sides in the circumferential direction, similarly to the third embodiment, the leakage magnetic flux of the rotor core 3a can be reduced, and high efficiency can be achieved.

（実施例５）
この実施例５は、ロータ３の径方向外側に第３のステータ１０を配置した事例である。第３のステータ１０は、図７に示す様に、ロータ３の径方向外側にエアギャップを介して配置される。この第３のステータ１０は、ステータ鉄心１０ａと、このステータ鉄心１０ａに巻装されるステータ巻線１０ｂとを有する。
ステータ鉄心１０ａは、ステータ鉄心４ａおよびステータ鉄心５ａと連結されて一体に設けられ、ステータ鉄心４ａおよびステータ鉄心５ａに形成されたスロット同士を連通する複数のスロットが軸方向に沿って形成される。
ステータ巻線１０ｂは、ステータ鉄心１０ａに全節巻され、かつ、ステータ巻線４ｂ、５ｂと各相コイル同士が直列に接続される。 (Example 5)
The fifth embodiment is an example in which the third stator 10 is disposed outside the rotor 3 in the radial direction. As shown in FIG. 7, the third stator 10 is disposed on the radially outer side of the rotor 3 via an air gap. The third stator 10 includes a stator iron core 10a and a stator winding 10b wound around the stator iron core 10a.
The stator iron core 10a is integrally connected to the stator iron core 4a and the stator iron core 5a, and a plurality of slots are formed along the axial direction to communicate the slots formed in the stator iron core 4a and the stator iron core 5a.
The stator winding 10b is wound around the stator iron core 10a, and the stator windings 4b and 5b and the phase coils are connected in series.

ロータ３は、例えば、実施例１に記載したロータ３の外径面にも突極構造を設けた突極型ロータ、あるいは、実施例２〜４に記載した何れか一つのロータ３の外周面に永久磁石８を埋設した永久磁石型ロータを使用できる。
この実施例５の構成では、ロータ３の径方向外側に第３のステータ１０を配置したことで、ロータ３の外周面にも力の作用点が生まれると共に、ステータ巻線４ｂ、５ｂのコイルエンドが第１のステータ４および第２のステータ５の内径側だけに存在する。言い換えると、外径側のコイルエンドが無くなるため、出力密度をより高めることができる。 The rotor 3 is, for example, a salient pole type rotor provided with a salient pole structure on the outer diameter surface of the rotor 3 described in the first embodiment, or the outer peripheral surface of any one rotor 3 described in the second to fourth embodiments. A permanent magnet type rotor in which permanent magnets 8 are embedded can be used.
In the configuration of the fifth embodiment, since the third stator 10 is arranged on the outer side in the radial direction of the rotor 3, an action point of force is generated on the outer peripheral surface of the rotor 3, and coil ends of the stator windings 4b and 5b are formed. Exists only on the inner diameter side of the first stator 4 and the second stator 5. In other words, since the coil end on the outer diameter side is eliminated, the output density can be further increased.

なお、実施例５のモータ１は、ロータ３の径方向外側に第３のステータ１０が配置されるので、ロータ鉄心３ａの外径をステータ鉄心４ａ、５ａの外径より大きくすることはできない。よって、図７に示す様に、ロータ鉄心３ａの内径をステータ鉄心４ａ、５ａの内径より小さく形成することで、内径側の磁路断面積を増大できる。その結果、周方向に流れる磁束の通り道をより多く確保できるので、ロータ鉄心３ａの磁気飽和を抑制でき、出力密度を高めることに寄与する。 In the motor 1 of the fifth embodiment, since the third stator 10 is disposed on the radially outer side of the rotor 3, the outer diameter of the rotor core 3a cannot be made larger than the outer diameter of the stator cores 4a and 5a. Therefore, as shown in FIG. 7, by forming the inner diameter of the rotor core 3a smaller than the inner diameter of the stator cores 4a and 5a, the magnetic path cross-sectional area on the inner diameter side can be increased. As a result, more paths for the magnetic flux flowing in the circumferential direction can be secured, so that the magnetic saturation of the rotor core 3a can be suppressed, which contributes to increasing the output density.

（実施例６）
この実施例６は、ステータ巻線４ｂ、５ｂのコイルエンドに関する事例である。
例えば、図１０に示す様に、複数本の銅線を束ねた巻線を鉄心のスロット内に収納する従来の巻線方式では、異なる相の巻線同士が重なることでコイルエンド４ｂｅ、５ｂｅの高さが大きくなる。この場合、図１１に示す様に、コイルエンド４ｂｅ、５ｂｅを断面Ｌ字型に曲げることで、コイルエンド４ｂｅ、５ｂｅの高さを抑えることが可能である。しかし、コイルエンド４ｂｅ、５ｂｅをＬ字型に曲げると、軸方向への膨らみが大きくなるため、ロータ３と干渉する恐れが生じる。 (Example 6)
The sixth embodiment is an example related to the coil ends of the stator windings 4b and 5b.
For example, as shown in FIG. 10, in a conventional winding method in which a winding in which a plurality of copper wires are bundled is housed in a slot of an iron core, windings of different phases overlap each other, so that coil ends 4be, 5be Height increases. In this case, as shown in FIG. 11, it is possible to suppress the height of the coil ends 4be and 5be by bending the coil ends 4be and 5be into an L-shaped cross section. However, if the coil ends 4be and 5be are bent in an L shape, the axial bulge is increased, which may cause interference with the rotor 3.

そこで、実施例６では、図８に示す様に、コイルエンド４ｂｅ、５ｂｅをクランク形状に曲げ加工したセグメント導体を使用することにより、同図（ｂ）に示す様に、例えば、１スロットに２本のセグメント導体を整列して収納できるため、コイルエンド４ｂｅ、５ｂｅの高さを低く抑えることができる。これにより、コイルエンド４ｂｅ、５ｂｅをＬ字型に曲げる必要はなく、図９に示す様に、軸方向ロータ側への膨らみを抑制できるので、ロータ３との干渉を防止できる。
なお、図８および図１０は、ステータの内径側コイルエンド４ｂｅ、５ｂｅを図示しているが、ステータの外径側にもコイルエンド４ｂｅ、５ｂｅを有する実施例１〜４の事例では、外径側のコイルエンド４ｂｅ、５ｂｅも内径側と同様にクランク形状に成形することで、ロータ３との干渉を防止できる。 Therefore, in the sixth embodiment, as shown in FIG. 8, by using segment conductors in which the coil ends 4be and 5be are bent into a crank shape, as shown in FIG. Since the segment conductors can be aligned and stored, the height of the coil ends 4be and 5be can be kept low. Accordingly, it is not necessary to bend the coil ends 4be and 5be into an L shape, and as shown in FIG. 9, the bulge toward the axial rotor side can be suppressed, so that interference with the rotor 3 can be prevented.
8 and 10 illustrate the inner diameter side coil ends 4be and 5be of the stator, but in the cases of Examples 1 to 4 having the coil ends 4be and 5be also on the outer diameter side of the stator, the outer diameter is illustrated. The coil ends 4be and 5be on the side are also formed into a crank shape like the inner diameter side, so that interference with the rotor 3 can be prevented.

（変形例）
実施例１〜４に記載したモータ１は、ロータ鉄心３ａの外径がステータ鉄心４ａ、５ａの外径より大きく、且つロータ鉄心３ａの内径がステータ鉄心４ａ、５ａの内径より小さい条件（Ｃ）を満たす事例であるが、これに限定するものではない。つまり、実施例１に記載した条件（Ａ）または条件（Ｂ）の関係を満たす構成であっても良い。
実施例２〜４に記載したロータ３は、ロータ鉄心３ａに埋設される永久磁石８の表面が第１ロータ表面および第２ロータ表面に露出するインセット型を採用しているが、ロータ鉄心３ａに磁石挿入孔を形成して、その磁石挿入孔に永久磁石８を挿入しても良い。つまり、永久磁石８の表面が第１ロータ表面および第２ロータ表面に露出しない磁石埋め込構造を採用することもできる。 (Modification)
In the motor 1 described in the first to fourth embodiments, the outer diameter of the rotor core 3a is larger than the outer diameter of the stator cores 4a and 5a, and the inner diameter of the rotor core 3a is smaller than the inner diameter of the stator cores 4a and 5a (C) However, the present invention is not limited to this. That is, a configuration that satisfies the relationship of the condition (A) or the condition (B) described in the first embodiment may be used.
The rotor 3 described in the second to fourth embodiments employs an inset type in which the surface of the permanent magnet 8 embedded in the rotor iron core 3a is exposed on the first rotor surface and the second rotor surface, but the rotor iron core 3a. It is also possible to form a magnet insertion hole and insert the permanent magnet 8 into the magnet insertion hole. That is, it is possible to employ a magnet embedded structure in which the surface of the permanent magnet 8 is not exposed on the first rotor surface and the second rotor surface.

１モータ（マルチギャップ型回転電機）
２シャフト（回転軸）
３ロータ
３ａロータ鉄心
４第１のステータ
４ａ第１のステータのステータ鉄心
４ｂ第１のステータのステータ巻線
５第２のステータ
５ａ第２のステータのステータ鉄心
５ｂ第２のステータのステータ巻線
８永久磁石
８ａ第１磁石
８ｂ第２磁石
９非磁性領域
１０第３のステータ 1 Motor (Multi-gap type rotating electrical machine)
2 Shaft (Rotating shaft)
DESCRIPTION OF SYMBOLS 3 Rotor 3a Rotor iron core 4 1st stator 4a Stator iron core of 1st stator 4b Stator winding of 1st stator 5 2nd stator 5a Stator iron core of 2nd stator 5b Stator winding of 2nd stator 8 Permanent magnet 8a First magnet 8b Second magnet 9 Non-magnetic region 10 Third stator

Claims

A rotor (3) having a disk-shaped rotor core (3a) arranged orthogonal to the rotation axis (2);
The rotor (3) has two stator cores (4a, 5a) disposed on both sides in the axial direction via air gaps, and the stator windings (4b, 5a) are respectively disposed on the two stator cores (4a, 5a). A multi-gap rotating electrical machine (1) comprising a first stator (4) and a second stator (5) configured by winding 5b),
The first stator (4) and the second stator (5) each have the same number of magnetic poles as the number of poles of the rotor (3), and face each other in the axial direction across the rotor (3). Generate magnetomotive force so that the magnetic poles of each other have the same polarity,
The rotor core (3a) and the stator core (4a, 5a)
The rotor core (3a) has an inner diameter that is less than or equal to the inner diameter of the stator core (4a, 5a), and the outer diameter of the rotor core (3a) is larger than the outer diameter of the stator core (4a, 5a). Condition (A),
The outer diameter of the rotor core (3a) is equal to or greater than the outer diameter of the stator core (4a, 5a), and the inner diameter of the rotor core (3a) is smaller than the inner diameter of the stator core (4a, 5a). Condition (B),
Condition that the outer diameter of the rotor core (3a) is larger than the outer diameter of the stator core (4a, 5a) and the inner diameter of the rotor core (3a) is smaller than the inner diameter of the stator core (4a, 5a). When we defined (C)
A multi-gap rotating electrical machine that satisfies any one of the conditions (A), (B), and (C).

In the multi-gap type rotating electrical machine (1) according to claim 1,
When the surface on one axial side of the rotor core (3a) is called a first rotor surface and the surface on the other axial side is called a second rotor surface,
The rotor (3) includes a plurality of permanent magnets having the same number of pole pairs on the first rotor surface side and the second rotor surface side with a predetermined interval in the axial direction of the rotor core (3a). 8) is buried,
The permanent magnet (8) embedded on the surface side of the first rotor and the permanent magnet (8) embedded on the surface side of the second rotor are arranged with a predetermined interval in the circumferential direction, respectively. A multi-gap type rotating electrical machine characterized by having the same circumferential arrangement.

In the multi-gap type rotating electrical machine (1) according to claim 2,
The permanent magnet (8) embedded on the surface side of the first rotor and the permanent magnet (8) embedded on the surface side of the second rotor are respectively magnetized in the axial direction and opposed in the axial direction. A multi-gap rotating electrical machine characterized in that the magnetic poles have the same polarity and the magnets adjacent in the circumferential direction have different polarities.

In the multi-gap type rotating electrical machine (1) according to claim 2,
The permanent magnet (8) embedded on the surface side of the first rotor and the permanent magnet (8) embedded on the surface side of the second rotor are magnetized in the circumferential direction and are adjacent to each other in the circumferential direction. Multi-gap rotation characterized in that magnets facing each other in the circumferential direction have the same polarity and magnets arranged at the same position in the circumferential direction have the same polarity in the circumferential direction. Electric.

In the multi-gap type rotating electrical machine (1) according to claim 2,
The rotor (3) has a nonmagnetic region (9) between the permanent magnets (8) adjacent to each other at a predetermined interval in the circumferential direction,
The permanent magnet (8) embedded on the surface side of the first rotor and the permanent magnet (8) embedded on the surface side of the second rotor have a predetermined interval in the radial direction of the rotor iron core (3a). An inner magnet (8ai, 8bi) disposed on the inner diameter side and an outer magnet (8ao, 8bo) disposed on the outer diameter side,
The inner magnets (8ai, 8bi) and the outer magnets (8ao, 8bo) are respectively magnetized in the radial direction, the magnetic poles facing each other in the radial direction have the same polarity, and the first rotor The inner magnets (8ai, 8bi) and the outer magnets (8ao, 8bo) arranged at the same position in the circumferential direction on the surface side and the second rotor surface side have the same radial polarity. A multi-gap rotating electrical machine characterized by this.

In the multi-gap type rotating electrical machine (1) according to any one of claims 2 to 5,
The multi-gap type rotation characterized in that the permanent magnet (8) is embedded in the rotor core (3a) with the axially outer surface exposed on the first rotor surface and the second rotor surface. Electric.

In the multi-gap type rotating electrical machine (1) according to any one of claims 2 to 5,
The multi-gap rotating electrical machine, wherein the permanent magnet (8) is embedded in the rotor core (3a).

In the multi-gap type rotating electrical machine (1) according to any one of claims 1 to 6,
The first stator (4) and the second stator (5) are characterized in that the stator windings (4b, 5b) are all wound around the stator core (4a, 5a), respectively. Gap type rotating electrical machine.

A disk-shaped rotor (3) arranged orthogonal to the rotation axis (2);
A first stator (4) and a second stator (5) disposed on both sides in the axial direction of the rotor (3) via air gaps,
A third stator (10) disposed via an air gap on the radially outer side of the rotor (3),
The first stator (4), the second stator (5), and the third stator (10) are integrally provided by connecting the stator iron cores (4a, 5a, 10a) to each other. A multi-gap rotating electrical machine (1) configured by winding stator windings (4b, 5b, 10b) around (4a, 5a, 10a),
The first stator (4), the second stator (5), and the third stator (10) each have the same number of magnetic poles as the number of poles of the rotor (3), and the first stator. (4) and the second stator (5) generate magnetomotive force so that the magnetic poles facing each other in the axial direction across the rotor (3) have the same polarity,
A multi-gap rotating electric machine characterized in that an inner diameter of the rotor core (3a) is smaller than an inner diameter of the stator core (4a, 5a).

In the multi-gap type rotating electrical machine (1) according to claim 9,
In the first stator (4), the second stator (5), and the third stator (10), the stator windings (4b, 5b, 10b) are connected to the stator cores (4a, 5a, 10a). A multi-gap type rotating electrical machine characterized by being fully wound.

The multi-gap rotating electrical machine (1) according to any one of claims 1 to 10, wherein the coil ends (4be, 5be) of the stator windings (4b, 5b) are formed in a crank shape. A multi-gap rotating electrical machine characterized by