JP3232489U - Brushless motor using a permanent magnet embedded rotor - Google Patents

Brushless motor using a permanent magnet embedded rotor Download PDF

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JP3232489U
JP3232489U JP2021001374U JP2021001374U JP3232489U JP 3232489 U JP3232489 U JP 3232489U JP 2021001374 U JP2021001374 U JP 2021001374U JP 2021001374 U JP2021001374 U JP 2021001374U JP 3232489 U JP3232489 U JP 3232489U
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magnetic pole
pole portion
magnet
peripheral surface
rotor
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青島　力
力 青島
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Xross Vate Inc
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【課題】永久磁石によるマグネットトルクとロータのインダクタンスの変化による突極率によるインダクタンストルクの両方を損なわない効率的なモーターを提供する。【解決手段】永久磁石はロータの外周面及び内周面に露出して構成し、永久磁石の鎖交磁束を大きく増やす形状とし永久磁石によるマグネットトルクを大きくしつつもリラクタンストルクを発生させるための磁路はリラクタンス部材を通って外側磁極部と内側磁極部との間で構成できるので十分な広さに保つことができ突極比を大きく構成できリラクタンストルクも大きくできる。【選択図】図１PROBLEM TO BE SOLVED: To provide an efficient motor which does not impair both a magnet torque due to a permanent magnet and an inductance torque due to a salient pole ratio due to a change in rotor inductance. SOLUTION: A permanent magnet is formed so as to be exposed on an outer peripheral surface and an inner peripheral surface of a rotor, and has a shape that greatly increases the interlinkage magnetic flux of the permanent magnet so as to generate a reluctance torque while increasing the magnet torque of the permanent magnet. Since the magnetic path can be formed between the outer magnetic pole portion and the inner magnetic pole portion through the reluctance member, it can be kept sufficiently wide, the salient pole ratio can be made large, and the reluctance torque can be made large. [Selection diagram] Fig. 1

Description

永久磁石を用いたブラシレスモータで特にマグネット埋め込み式のロータを用いるブラシレスモータ（ＩＰＭモータ）の構造に関するものである。The present invention relates to a brushless motor using a permanent magnet, and particularly to a structure of a brushless motor (IPM motor) using a rotor embedded with a magnet.

近年、軟磁性材料からなるロータとその内部に永久磁石を埋め込み、ロータの軟磁性材料特性のリラクタンストルクによる回転力と永久磁石によるマグネットトルクによる回転力の両方を用いて回転力とする永久磁石埋め込み式のロータを用いたモータ（ＩＰＭモータ）が知られているIn recent years, a rotor made of a soft magnetic material and a permanent magnet are embedded inside the rotor, and the permanent magnet is embedded using both the rotational force due to the relaxation torque of the soft magnetic material characteristics of the rotor and the rotational force due to the magnet torque due to the permanent magnet. A motor using a type of rotor (IPM motor) is known.

特許６２２６８６７Patent 6226867 特開２０１５−２０４６３８JP 2015-204638

前記先行技術文献等に記載されているＩＰＭモータのロータの構成すなわち軟磁性材料のロータに対してマグネットを埋め込みリラクタンストルクを発生するためのロータ内の磁路をマグネットの外周面に設けるロータ構造では、発生トルクを大きくするには永久磁石の鎖交磁束を大きく増やすかリラクタンスの突極比を大きくするかであり、突極比を大きくするにリラクタンストルクを発生する磁路を広くする必要がある。従来構造の場合は、リラクタンストルクが発生する磁路がマグネットの外周面に形成されているので、その場合は永久磁石がロータの中心方向に配置せざるを得なくなり磁石の利用面積が小さくなってしまう。逆に永久磁石の鎖交磁束を増やそうとすると永久磁石は外周面近くに配置せざるを得なくなり永久磁石の外周面側に配置されているリラクタンストルクが発生する磁路は狭くなってしまい突極比が減少してリラクタンストルクは減少してしまう。In the rotor structure of the IPM motor described in the prior art documents and the like, that is, in the rotor structure in which a magnet is embedded in a rotor made of a soft magnetic material and a magnetic path in the rotor for generating reluctance torque is provided on the outer peripheral surface of the magnet. To increase the generated torque, either increase the interlinkage magnetic flux of the permanent magnet or increase the reluctance salient pole ratio. To increase the salient pole ratio, it is necessary to widen the magnetic path that generates the reluctance torque. .. In the case of the conventional structure, a magnetic path for generating reluctance torque is formed on the outer peripheral surface of the magnet, so in that case, the permanent magnet has to be arranged toward the center of the rotor, and the area used by the magnet becomes smaller. It ends up. Conversely, if you try to increase the interlinkage magnetic flux of the permanent magnet, the permanent magnet must be placed near the outer peripheral surface, and the magnetic path that generates the reluctance torque that is placed on the outer peripheral surface side of the permanent magnet becomes narrower and the salient pole. The ratio decreases and the reluctance torque decreases.

円筒形状の磁石保持部材と
該磁石保持部材の外周面に複数の扇型板形状であり軟磁性材料からなる隣り合う磁石とは異なる極性に着磁された永久磁石が交互に設けられて構成される外側磁石層と、該磁石保持部材の内周面に前記外側磁石層と同じ方向の磁界となるように配置された複数の扇型板形状であり隣り合う磁石とは異なる極性に着磁された永久磁石が交互に設けられて構成される内側磁石層と、一端を前記外側磁石層の外周面と同方向に向けられた外側磁極対向部ともう一端を前記内側磁石層の内周面と同方向に向けられた内側磁極対向部とを持ち前記外側磁石層を形成する各磁石の隣り合う境界面並びに前記内側磁石層を形成する各磁石の隣り合う境界面に挿入された軟磁性材料で形成されたリラクタンス部材とからなるロータと、
軟磁性材料からなり該ロータの外側磁石層の外周面に隙間をもって対向する第１の外側磁極部と該ロータの内側磁石層の内周面に隙間をもって対向する第１の内側磁極部と該第１の内側磁極部と前記第１の外側磁極部とをつなぐ連結部を持つ第１ステータと、
前記第１ステータの第１の外側磁極部と連結部の間であって前記ロータの外側磁石層とは軸方向に並んで配置され第１ステータに巻回され第１の外側磁極部を励磁する第１の外側コイルと、
前記第１ステータの第１の内側磁極部と連結部の間に前記ロータの内側磁石層とは軸方向に並んで配置され第１ステータに巻回され第１の外側磁極と異なる極性に第１の内側磁極部を励磁する第１の内側コイルと、
軟磁性材料からなり該ロータの外側磁石層の外周面に隙間をもって対向する第２の外側磁極部と該ロータの内側磁石層の内周面に隙間をもって対向する第２の内側磁極部と該第２の内側磁極部と前記第２の外側磁極部とをつなぐ連結部を持つ第２ステータと、
前記第２ステータの第２の外側磁極部と連結部の間であって前記ロータの外側磁石層とは軸方向に並んで配置され第２ステータに巻回され第２の外側磁極部を励磁する第２の外側コイルと、
前記第２ステータの第２の内側磁極部と連結部の間に前記ロータの内側磁石層とは軸方向に並んで配置され第２ステータに巻回され第２の外側磁極と異なる極性に第２の内側磁極部を励磁する第２の内側コイルと、
軟磁性材料からなり該ロータの外側磁石層の外周面に隙間をもって対向する第３の外側磁極部と該ロータの内側磁石層の内周面に隙間をもって対向する第３の内側磁極部と該第３の内側磁極部と前記第３の外側磁極部とをつなぐ連結部を持つ第３ステータと、
前記第３ステータの第３の外側磁極部と連結部の間であって前記ロータの外側磁石層とは軸方向に並んで配置され第３ステータに巻回され第３の外側磁極部を励磁する第３の外側コイルと、
前記第３ステータの第３の内側磁極部と連結部の間であって前記ロータの内側磁石層とは軸方向に並んで配置され第３ステータに巻回され第３の外側磁極と異なる極性に第３の内側磁極部を励磁する第３の内側コイルと、
を備える。A cylindrical magnet holding member and a plurality of fan-shaped plate-shaped permanent magnets magnetized to a different polarity from adjacent magnets made of a soft magnetic material are alternately provided on the outer peripheral surface of the magnet holding member. The outer magnet layer and the inner peripheral surface of the magnet holding member have a plurality of fan-shaped plates arranged so as to have a magnetic field in the same direction as the outer magnet layer, and are magnetized with a polarity different from that of adjacent magnets. An inner magnet layer formed by alternately providing permanent magnets, an outer magnetic pole facing portion having one end directed in the same direction as the outer peripheral surface of the outer magnet layer, and an inner peripheral surface of the inner magnet layer at the other end. A soft magnetic material inserted into the adjacent interface of each magnet forming the outer magnet layer and the adjacent interface of each magnet forming the inner magnet layer and having an inner magnetic pole facing portion oriented in the same direction. A rotor made of formed relaxation members,
A first outer magnetic pole portion made of a soft magnetic material and facing the outer peripheral surface of the outer magnet layer of the rotor with a gap, a first inner magnetic pole portion facing the inner peripheral surface of the inner magnet layer of the rotor with a gap, and the first. A first stator having a connecting portion connecting the inner magnetic pole portion of 1 and the first outer magnetic pole portion,
Between the first outer magnetic pole portion of the first stator and the connecting portion, the outer magnet layer of the rotor is arranged side by side in the axial direction and wound around the first stator to excite the first outer magnetic pole portion. With the first outer coil,
The inner magnet layers of the rotor are arranged in an axial direction between the first inner magnetic pole portion and the connecting portion of the first stator, and are wound around the first stator to have a polarity different from that of the first outer magnetic pole. The first inner coil that excites the inner magnetic pole of the
A second outer magnetic pole portion made of a soft magnetic material and facing the outer peripheral surface of the outer magnet layer of the rotor with a gap, a second inner magnetic pole portion facing the inner peripheral surface of the inner magnet layer of the rotor with a gap, and the first A second stator having a connecting portion connecting the inner magnetic pole portion of 2 and the second outer magnetic pole portion,
Between the second outer magnetic pole portion of the second stator and the connecting portion, the outer magnet layer of the rotor is arranged side by side in the axial direction and wound around the second stator to excite the second outer magnetic pole portion. With the second outer coil,
The inner magnet layer of the rotor is arranged side by side in the axial direction between the second inner magnetic pole portion and the connecting portion of the second stator, and is wound around the second stator to have a polarity different from that of the second outer magnetic pole. The second inner coil that excites the inner magnetic pole of the
A third outer magnetic pole portion made of a soft magnetic material and facing the outer peripheral surface of the outer magnet layer of the rotor with a gap, a third inner magnetic pole portion facing the inner peripheral surface of the inner magnet layer of the rotor with a gap, and the first A third stator having a connecting portion connecting the inner magnetic pole portion of 3 and the third outer magnetic pole portion, and
Between the third outer magnetic pole portion of the third stator and the connecting portion, the outer magnet layer of the rotor is arranged side by side in the axial direction and wound around the third stator to excite the third outer magnetic pole portion. With the third outer coil,
Between the third inner magnetic pole portion and the connecting portion of the third stator, the inner magnet layer of the rotor is arranged side by side in the axial direction and wound around the third stator to have a polarity different from that of the third outer magnetic pole. A third inner coil that excites the third inner magnetic pole,
To be equipped.

上記の構成により、永久磁石はロータの外周面及び内周面に露出して構成できるため永久磁石の鎖交磁束を大きく増やす形状とし永久磁石によるマグネットトルクを大きくしつつもリラクタンストルクを発生させるための磁路はリラクタンス部材を通って外側磁極部と内側磁極部との間で構成できるので十分な広さに保つことができ突極比を大きく構成できリラクタンストルクも大きくできる。With the above configuration, the permanent magnet can be exposed on the outer and inner peripheral surfaces of the rotor, so that the shape is such that the interlinkage magnetic flux of the permanent magnet is greatly increased, and the reluctance torque is generated while increasing the magnet torque of the permanent magnet. Since the magnetic path can be formed between the outer magnetic pole portion and the inner magnetic pole portion through the reluctance member, it can be maintained at a sufficient width, the salient pole ratio can be increased, and the reluctance torque can be increased.

本発明の第１の実施例の各部品の構成を示す分解斜視図An exploded perspective view showing the configuration of each component according to the first embodiment of the present invention. 組み立て時の断面図Cross section at the time of assembly 断面平面図Sectional plan view 断面平面図Sectional plan view 制御回路のブロック図Control circuit block diagram 動作時の励磁表Excitation table during operation マグネットの着磁状態を示す平面図Top view showing the magnetized state of the magnet

図１から図７は本発明の実施例を示す図であり、図１は各部品の構成を示す分解斜視図、図２は組み立て時の断面図、図３と図４は断面平面図、図５は制御回路のブロック図、図６は動作時の励磁表、図７は永久磁石の着磁状態を示す平面図である。
図１において、１は円筒形状の磁石保持部材、２ａ，２ｂ，２ｃ，２ｄ，２ｅ，２ｆ，２ｇ，２ｈ，２ｉ，２ｊ，２ｋ，２ｌ，２ｍ，２ｎは扇型板形状の永久磁石である外側磁石で磁石保持部材１の円筒外周部１ａに固着されている。
外側磁石２ａ，２ｃ，２ｅ，２ｇ，２ｉ，２ｋ，２ｍは外周面がＳ極、磁石保持部材１の円筒外周面１ａに面した内周面はＮ極になるように着磁されている。
外側磁石２ａ，２ｃ，２ｅ，２ｇ，２ｉ，２ｋ，２ｍと隣り合って配列された外側磁石２ｂ，２ｅ，２ｆ，２ｈ，２ｊ，２ｌ，２ｎは外周面がＮ極、磁石保持部材１の円筒外周面１ａに面した内周面はＳ極になるように着磁されている。
４ａ，４ｂ，４ｃ，４ｄ，４ｅ，４ｆ，４ｇ，４ｈ，４ｉ，４ｊ，４ｋ，４ｌ，４ｍ，４ｎは軟磁性材料からなるリラクタンス部材でそれぞれが外側磁石２ａと２ｂの間、外側磁石２ｂと２ｃの間、外側磁石２ｃと２ｄの間、外側磁石２ｄと２ｅの間、外側磁石２ｅと２ｆの間、外側磁石２ｆと２ｇの間、外側磁石２ｇと２ｈの間、外側磁石２ｈと２ｉの間、外側磁石２ｉと２ｊの間、外側磁石２ｊと２ｋの間、外側磁石２ｋと２ｌの間、外側磁石２ｌと２ｍの間、外側磁石２ｍと２ｎの間、外側磁石２ｎと２ａの間に配置されている。
外側磁石２ａ，２ｂ，２ｃ，２ｄ，２ｅ，２ｆ，２ｇ，２ｈ，２ｉ，２ｊ，２ｋ，２ｌ，２ｍ，２ｎで外側磁石層を形成している。
３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎは扇型板形状の永久磁石である内側磁石で磁石保持部材１の円筒内周部１ｂに固着されている。
内側磁石３ａ，３ｃ，３ｅ，３ｇ，３ｉ，３ｋ，３ｍは磁石保持部材１の円筒内周面１ｂに面した内周面はＳ極に、内周面がＮ極なるように着磁されている。
内側磁石３ａ，３ｃ，３ｅ，３ｇ，３ｉ，３ｋ，３ｍはそれぞれが外側磁石２ａ，２ｃ，２ｅ，２ｇ，２ｉ，２ｋ，２ｍと同じ角度範囲になるように配置されている。
内側磁石３ｂ，３ｄ，３ｆ，３ｈ，３ｊ，３ｌ，３ｎは磁石保持部材１の円筒内周面１ｂに面した内周面はＮ極に、内周面がＳ極なるように着磁されている。
内側磁石３ｂ，３ｄ，３ｆ，３ｈ，３ｊ，３ｌ，３ｎはそれぞれが外側磁石２ｂ，２ｄ，２ｆ，２ｈ，２ｊ，２ｌ，２ｎと同じ角度範囲になるように配置されている。
また外側磁石２ａ，２ｂ，２ｃ，２ｄ，２ｅ，２ｆ，２ｇ，２ｈ，２ｉ，２ｊ，２ｋ，２ｌ，２ｍ，２ｎとそれぞれの円周方向に関して同じ角度範囲で対応する内側磁石３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎとはそれぞれが同じ磁界を形成するような向きで配置されていることになる
リラクタンス部材４ａ，４ｂ，４ｃ，４ｄ，４ｅ，４ｆ，４ｇ，４ｈ，４ｉ，４ｊ，４ｋ，４ｌ，４ｍ，４ｎはそれぞれが内側磁石３ａと３ｂの間、内側磁石３ｂと３ｃの間、内側磁石３ｃと３ｄの間、内側磁石３ｄと３ｅの間、内側磁石３ｅと３ｆの間、内側磁石３ｆと３ｇの間、内側磁石３ｇと３ｈの間、内側磁石３ｈと３ｉの間、内側磁石３ｉと３ｊの間、内側磁石３ｊと３ｋの間、内側磁石３ｋと３ｌの間、内側磁石３ｌと３ｍの間、内側磁石３ｍと３ｎの間、内側磁石３ｎと３ａの間に配置されている。
内側磁石３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎで内側磁石層を形成している。
リラクタンス部材４ａは一端が外側磁石層の外周面を向き後述の外側磁極部に隙間をもって対向する外側磁極対向部４ａａ、もう一端が内側磁石層の内周面を向き後述の内側磁極部に隙間をもって対向する内側磁極対向部４ａｂを備える。
リラクタンス部材４ｂは一端が外側磁石層の外周面を向き後述の外側磁極部に隙間をもって対向する外側磁極対向部４ｂａ、もう一端が内側磁石層の内周面を向き後述の内側磁極部に隙間をもって対向する内側磁極対向部４ｂｂを備える。
リラクタンス部材４ｃは一端が外側磁石層の外周面を向き後述の外側磁極部に隙間をもって対向する外側磁極対向部４ｃａ、もう一端が内側磁石層の内周面を向き後述の内側磁極部に隙間をもって対向する内側磁極対向部４ｃｂを備える。
リラクタンス部材４ｄは一端が外側磁石層の外周面を向き後述の外側磁極部に隙間をもって対向する外側磁極対向部４ｄａ、もう一端が内側磁石層の内周面を向き後述の内側磁極部に隙間をもって対向する内側磁極対向部４ｄｂを備える。
リラクタンス部材４ｅは一端が外側磁石層の外周面を向き後述の外側磁極部に隙間をもって対向する外側磁極対向部４ｅａ、もう一端が内側磁石層の内周面を向き後述の内側磁極部に隙間をもって対向する内側磁極対向部４ｅｂを備える。
リラクタンス部材４ｆは一端が外側磁石層の外周面を向き後述の外側磁極部に隙間をもって対向する外側磁極対向部４ｆａ、もう一端が内側磁石層の内周面を向き後述の内側磁極部に隙間をもって対向する内側磁極対向部４ｆｂを備える。
リラクタンス部材４ｇは一端が外側磁石層の外周面を向き後述の外側磁極部に隙間をもって対向する外側磁極対向部４ｇａ、もう一端が内側磁石層の内周面を向き後述の内側磁極部に隙間をもって対向する内側磁極対向部４ｇｂを備える。
リラクタンス部材４ｈは一端が外側磁石層の外周面を向き後述の外側磁極部に隙間をもって対向する外側磁極対向部４ｈａ、もう一端が内側磁石層の内周面を向き後述の内側磁極部に隙間をもって対向する内側磁極対向部４ｈｂを備える。
リラクタンス部材４ｉは一端が外側磁石層の外周面を向き後述の外側磁極部に隙間をもって対向する外側磁極対向部４ｉａ、もう一端が内側磁石層の内周面を向き後述の内側磁極部に隙間をもって対向する内側磁極対向部４ｉｂを備える。
リラクタンス部材４ｊは一端が外側磁石層の外周面を向き後述の外側磁極部に隙間をもって対向する外側磁極対向部４ｊａ、もう一端が内側磁石層の内周面を向き後述の内側磁極部に隙間をもって対向する内側磁極対向部４ｊｂを備える。
リラクタンス部材４ｋは一端が外側磁石層の外周面を向き後述の外側磁極部に隙間をもって対向する外側磁極対向部４ｋａ、もう一端が内側磁石層の内周面を向き後述の内側磁極部に隙間をもって対向する内側磁極対向部４ｋｂを備える。
リラクタンス部材４ｌは一端が外側磁石層の外周面を向き後述の外側磁極部に隙間をもって対向する外側磁極対向部４ｌａ、もう一端が内側磁石層の内周面を向き後述の内側磁極部に隙間をもって対向する内側磁極対向部４ｌｂを備える。
リラクタンス部材４ｍは一端が外側磁石層の外周面を向き後述の外側磁極部に隙間をもって対向する外側磁極対向部４ｍａ、もう一端が内側磁石層の内周面を向き後述の内側磁極部に隙間をもって対向する内側磁極対向部４ｍｂを備える。
リラクタンス部材４ｎは一端が外側磁石層の外周面を向き後述の外側磁極部に隙間をもって対向する外側磁極対向部４ｎａ、もう一端が内側磁石層の内周面を向き後述の内側磁極部に隙間をもって対向する内側磁極対向部４ｎｂを備える。
磁石保持部材１と外側磁石２ａ，２ｂ，２ｃ，２ｄ，２ｅ，２ｆ，２ｇ，２ｈ，２ｉ，２ｊ，２ｋ，２ｌ，２ｍ，２ｎからなる外側磁石層、内側磁石３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎからなる内側磁石層と、リラクタンス部材４ａ，４ｂ，４ｃ，４ｄ，４ｅ，４ｆ，４ｇ，４ｈ，４ｉ，４ｊ，４ｋ，４ｌ，４ｍ，４ｎでロータを形成している。
磁石保持部材１は後述のベースステータに回転可能に取り付けられている。
外側磁石２ａ，２ｂ，２ｃ，２ｄ，２ｅ，２ｆ，２ｇ，２ｈ，２ｉ，２ｊ，２ｋ，２ｌ，２ｍ，２ｎの表面磁束密度は内側磁石３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎの表面磁束密度よりも高くなるように着磁されている。
５は軟磁性材料からなるベースステータで前記外側磁石層の外周側の着磁部に隙間をもって対向する外側磁極部５ａが円周を１２分割された３０度ごとに配置されて、内側磁極部５ｂが前記内側着磁層の内周側の着磁部に隙間をもって対向し外側磁極部５ａと同じ角度範囲に円周を１２分割された３０度ごとに配置されている。前記外側磁極部５ａと内側磁極部５ｂとは連結部５ｃ部で磁気的に連結され磁気回路を構成する。
図に示すように複数の外側磁極部と永久磁石を挟んで隙間をもってそれに同じ角度範囲で対向する内側磁極部とを連結部を介してつなぐステータをこのベースステータで構成する。
ロータの回転位相に応じて前記リラクタンス部材４ａ，４ｂ，４ｃ，４ｄ，４ｅ，４ｆ，４ｇ，４ｈ，４ｉ，４ｊ，４ｋ，４ｌ，４ｍ，４ｎと外側磁極部５ａ、内側磁極部５ｂ、連結部５ｃでエアギャップを持つ磁路を形成する。
６、７、８、９、１０、１１、１２、１３、１４、１５、１６、１７は外側コイルで外側コイル６、外側コイル８、外側コイル１０、外側コイル１２、外側コイル１４、外側コイル１６、外側コイル７、外側コイル９、外側コイル１０、外側コイル１３、外側コイル１５、外側コイル１７の周方向における順番で前記ベースステータ５の外側磁極部５ａと連結部５ｃの間に前記外側磁石２ａ，２ｂ，２ｃ，２ｄ，２ｅ，２ｆ，２ｇ，２ｈ，２ｉ，２ｊ，２ｋ，２ｌ，２ｍ，２ｎとは軸方向に並んで配置され外側磁極部を励磁可能に巻回されている。
外側コイル６，１２と外側コイル９，１５は同時に励磁されるが巻き方向が逆のため外側コイル６，１２によって励磁される外側磁極部５ａと外側コイル９，１５によって励磁される外側磁極部５ａはお互いに異なる極性に励磁される。
外側コイル７，１３と外側コイル１０，１６は同時に励磁されるが巻き方向が逆のため外側コイル７，１３によって励磁される外側磁極部５ａと外側コイル１０，１６によって励磁される外側磁極部５ａはお互いに異なる極性に励磁される。
外側コイル８，１４と外側コイル１１，１７は同時に励磁されるが巻き方向が逆のため外側コイル８，１４によって励磁される外側磁極部５ａと外側コイル１１，１７によって励磁される外側磁極部５ａはお互いに異なる極性に励磁される。
１８、１９、２０、２１、２２、２３、２４、２５、２６、２７、２８、２９は内側コイルであり内側コイル１８は前記外側コイル６が巻回される外側磁極５ａと同じ角度範囲で永久磁石を挟んでその内周面に隙間をもって対向する内側磁極部５ｂと連結部５ｃの間に前記内側磁石３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎとは軸方向に並んで配置され、内側磁極部５ｂを外側コイル６が外側磁極５ａを励磁するのとは異なる極で同時に励磁可能に巻回されている。
内側コイル１９は前記外側コイル７が巻回される外側磁極５ａと同じ角度範囲で永久磁石を挟んでその内周面に隙間をもって対向する内側磁極部５ｂと連結部５ｃの間に前記内側磁石３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎとは軸方向に並んで配置され、内側磁極部５ｂを外側コイル７が外側磁極５ａを励磁するのとは異なる極で同時に励磁可能に巻回されている。
内側コイル２０は前記外側コイル８が巻回される外側磁極５ａと同じ角度範囲で永久磁石を挟んでその内周面に隙間をもって対向する内側磁極部５ｂと連結部５ｃの間に前記内側磁石３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎとは軸方向に並んで配置され、内側磁極部５ｂを外側コイル８が外側磁極５ａを励磁するのとは異なる極で同時に励磁可能に巻回されている。
内側コイル２１は前記外側コイル９が巻回される外側磁極５ａと同じ角度範囲で永久磁石を挟んでその内周面に隙間をもって対向する内側磁極部５ｂと連結部５ｃの間に前記内側磁石３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎとは軸方向に並んで配置され、内側磁極部５ｂを外側コイル９が外側磁極５ａを励磁するのとは異なる極で同時に励磁可能に巻回されている。
内側コイル２２は前記外側コイル１０が巻回される外側磁極５ａと同じ角度範囲で永久磁石を挟んでその内周面に隙間をもって対向する内側磁極部５ｂと連結部５ｃの間に前記内側磁石３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎとは軸方向に並んで配置され、内側磁極部５ｂを外側コイル１０が外側磁極５ａを励磁するのとは異なる極で同時に励磁可能に巻回されている。
内側コイル２３は前記外側コイル１０が巻回される外側磁極５ａと同じ角度範囲で永久磁石を挟んでその内周面に隙間をもって対向する内側磁極部５ｂと連結部５ｃの間に前記内側磁石３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎとは軸方向に並んで配置され、内側磁極部５ｂを外側コイル１０が外側磁極５ａを励磁するのとは異なる極で同時に励磁可能に巻回されている。
内側コイル２４は前記外側コイル１２が巻回される外側磁極５ａと同じ角度範囲で永久磁石を挟んでその内周面に隙間をもって対向する内側磁極部５ｂと連結部５ｃの間に前記内側磁石３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎとは軸方向に並んで配置され、内側磁極部５ｂを外側コイル１２が外側磁極５ａを励磁するのとは異なる極で同時に励磁可能に巻回されている。
内側コイル２５は前記外側コイル１３が巻回される外側磁極５ａと同じ角度範囲で永久磁石を挟んでその内周面に隙間をもって対向する内側磁極部５ｂと連結部５ｃの間に前記内側磁石３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎとは軸方向に並んで配置され、内側磁極部５ｂを外側コイル１３が外側磁極５ａを励磁するのとは異なる極で同時に励磁可能に巻回されている。
内側コイル２６は前記外側コイル１４が巻回される外側磁極５ａと同じ角度範囲で永久磁石を挟んでその内周面に隙間をもって対向する内側磁極部５ｂと連結部５ｃの間に前記内側磁石３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎとは軸方向に並んで配置され、内側磁極部５ｂを外側コイル１４が外側磁極５ａを励磁するのとは異なる極で同時に励磁可能に巻回されている。
内側コイル２７は前記外側コイル１５が巻回される外側磁極５ａと同じ角度範囲で永久磁石を挟んでその内周面に隙間をもって対向する内側磁極部５ｂと連結部５ｃの間に前記内側磁石３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎとは軸方向に並んで配置され、内側磁極部５ｂを外側コイル１５が外側磁極５ａを励磁するのとは異なる極で同時に励磁可能に巻回されている。
内側コイル２８は前記外側コイル１６が巻回される外側磁極５ａと同じ角度範囲で永久磁石を挟んでその内周面に隙間をもって対向する内側磁極部５ｂと連結部５ｃの間に前記内側磁石３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎとは軸方向に並んで配置され、内側磁極部５ｂを外側コイル１６が外側磁極５ａを励磁するのとは異なる極で同時に励磁可能に巻回されている。
内側コイル２９は前記外側コイル１７が巻回される外側磁極５ａと同じ角度範囲で永久磁石を挟んでその内周面に隙間をもって対向する内側磁極部５ｂと連結部５ｃの間に前記内側磁石３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎとは軸方向に並んで配置され、内側磁極部５ｂを外側コイル１７が外側磁極５ａを励磁するのとは異なる極で同時に励磁可能に巻回されている。
ベースステータ５は３ｄ部で前記磁石保持部材１の軸部１ｃが回転可能に保持している。
外側コイル６，７，８，９，１０，１１，１２，１３，１４，１５，１６、１７の導線線径をｄ１とし、内側コイル１８、１９、２０、２１、２２、２３、２４、２５、２６、２７、２８、２９の導線線径をｄ２とするとｄ１＞ｄ２となるよう構成されている。
外側コイル６，１２，９，１５は請求項における第１の外側コイル、内側コイル１８，２４、２１、２７は請求項における第１の内側コイルであり第１の外側コイルと第１の内側コイルで三相ブラシレスモータのＵ相を構成する。
外側コイル６，１２，９，１５で励磁される外側磁極５ａが第１の外側磁極部、内側コイル１８，２４、２１、２７で励磁される内側磁極５ｂが第１の内側磁極部であり、第１の外側磁極部と第１の内側磁極部と連結部５ｃ部とで第１のステータを構成する。
外側コイル７，１３，１０，１６は請求項における第２の外側コイル、内側コイル１９，２５、２２、２８は請求項における第２の内側コイルであり第２の外側コイルと第２の内側コイルで三相ブラシレスモータのＶ相を構成する。
外側コイル７，１３，１０，１６で励磁される外側磁極５ａが第２の外側磁極部、内側コイル１９，２５、２２、２８で励磁される内側磁極５ｂが第２の内側磁極部であり、第２の外側磁極部と第２の内側磁極部と連結部５ｃ部とで第２のステータを構成する。
外側コイル８，１４，１１，１７は請求項における第３の外側コイル、内側コイル２０，２６、２３、２９は請求項における第３の内側コイルであり第３の外側コイルと第３の内側コイルで三相ブラシレスモータのＷ相を構成する。
外側コイル８，１４，１１，１７で励磁される外側磁極５ａが第３の外側磁極部、内側コイル２０，２６、２３、２９で励磁される内側磁極５ｂが第３の内側磁極部であり、第３の外側磁極部と第３の内側磁極部と連結部５ｃ部とで第３のステータを構成する。
組み立て時の断面の様子を図２に示す。
図３、図４は永久磁石の位置でみた平面断面図である。
図３で示す状態は、第１の外側コイルである外側コイル６，１２，９，１５と第１の内側コイルである内側コイル１８，２４、２１、２７に通電がなされてそれらコイルにより励磁された第１の外側磁極５ａと第１の内側磁極５ｂが励磁状態にあり、第２の外側コイルである外側コイル７，１３，１０，１６と第２の内側コイルである内側コイル１９，２５、２２、２８に通電がなされてそれらコイルにより励磁された第２の外側磁極５ａと第２の内側磁極５ｂが励磁状態にある場合の永久磁石からなる外側磁石層と内側磁石層の鎖交磁束が最大となる位相となるときのロータの位相を示している。
図４で示す状態は、第１の外側コイルである外側コイル６，１２，９，１５と第１の内側コイルである内側コイル１８，２４、２１、２７に通電がなされてそれらコイルにより励磁された第１の外側磁極５ａと第１の内側磁極５ｂが励磁状態にあり第２の外側コイルである外側コイル７，１３，１０，１６と第２の内側コイルである内側コイル１９，２５、２２、２８に通電がなされてそれらコイルにより励磁された第２の外側磁極５ａと第２の内側磁極５ｂが励磁状態にある場合のリラクタンス部材４ａ，４ｂ，４ｃ，４ｄ，４ｅ，４ｆ，４ｇ，４ｈ，４ｉ，４ｊ，４ｋ，４ｌ，４ｍ，４ｎとで形成する磁路のリラクタンスが最小となりロータの位相が安定状態になる状態のロータ位相を示している。
図５は制御回路およびコイル結線を示すブロック図であり、Ｔｒ１、Ｔｒ２、Ｔｒ３、Ｔｒ４、Ｔｒ５、Ｔｒ６はそれぞれトランジスタで公知のＹ字結線３相モータ駆動回路である。図６は通電のシーケンスによるコイルの励磁状態を示すコイル励磁表である。第１状態から第２状態、第３状態、第４状態、第５状態、第６状態へと通電を切り替えてＵ相、Ｖ相、Ｗ相をそれぞれ励起しモータを回転させていく。
図５において、外側コイル６と内側コイル１８と、外側コイル７と内側コイル１９と、外側コイル８と内側コイル２０と、外側コイル９と内側コイル２１と、外側コイル１０と内側コイル２２と、外側コイル１１と内側コイル２３と、外側コイル１２と内側コイル２４と、外側コイル１３と内側コイル２５と、外側コイル１４と内側コイル２６と、外側コイル１５と内側コイル２７と、外側コイル１６と内側コイル２８と、外側コイル１７と内側コイル２９とがそれぞれ並列に接続されている。
ｄ１＞ｄ２となるよう構成されているためコイルの流れる電流も外側コイルのほうが内側コイルよりも多くなり外側磁極部５ａが外側コイル６，７，８，９，１０，１１，１２，１３，１４，１５，１６、１７で励磁されて発生する磁束は内側磁極部５ｃが内側コイル１８、１９、２０、２１、２２、２３、２４、２５、２６、２７、２８、２９で励磁されたときに発生する磁束よりも多くなる。
図７は永久磁石１の着磁状態を示すもので矢印で磁束を示している。
図７に示すようにロータの外側磁石２ａ，２ｂ，２ｃ，２ｄ，２ｅ，２ｆ，２ｇ，２ｈ，２ｉ，２ｊ，２ｋ，２ｌ，２ｍ，２ｎの表面磁束総数は内側磁石３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎの表面磁束総数よりも高く設定されており、外側磁石２ａ，２ｂ，２ｃ，２ｄ，２ｅ，２ｆ，２ｇ，２ｈ，２ｉ，２ｊ，２ｋ，２ｌ，２ｍ，２ｎには多くの磁束が発生する外側磁極部３ａ、内側磁石３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎには外側磁極部５ａよりも少ない磁束が発生する内側磁極部５ｂが対向しバランスの良い効率的な駆動力が発生するようになっている。
ロータの外側磁石２ａ，２ｂ，２ｃ，２ｄ，２ｅ，２ｆ，２ｇ，２ｈ，２ｉ，２ｊ，２ｋ，２ｌ，２ｍ，２ｎの外側着磁層及び内側磁石３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎの内側着磁層の両方の面に対し磁界を作用させているので従来の構成に比べて高い駆動力が発生することができる。
外側磁極５ａには外側磁石２ａ，２ｂ，２ｃ，２ｄ，２ｅ，２ｆ，２ｇ，２ｈ，２ｉ，２ｊ，２ｋ，２ｌ，２ｍ，２ｎが対向し、内側磁極５ｂには内側磁石３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎが対向するように構成されているので外側磁石と内側磁石を一体的に構成した場合に比べて磁石の厚さを薄く構成できる。さらに磁石保持部材１を樹脂で構成した場合はロータを軽量化することができ、また、軟磁性材料からなるリラクタンス部材４ａ，４ｂ，４ｃ，４ｄ，４ｅ，４ｆ，４ｇ，４ｈ，４ｉ，４ｊ，４ｋ，４ｌ，４ｍ，４ｎにより磁路形成される場合のロータ回転位相におけるリラクタンスの変化が大きくとれるのでリラクタンストルクを大きくすることができる。1 to 7 are views showing an embodiment of the present invention, FIG. 1 is an exploded perspective view showing a configuration of each component, FIG. 2 is a sectional view at the time of assembly, and FIGS. 3 and 4 are a sectional plan view and a view. 5 is a block diagram of the control circuit, FIG. 6 is an excitation table during operation, and FIG. 7 is a plan view showing a magnetized state of the permanent magnet.
In FIG. 1, 1 is a cylindrical magnet holding member, 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i, 2j, 2k, 2l, 2m, 2n are fan-shaped permanent magnets. It is fixed to the outer peripheral portion 1a of the cylinder of the magnet holding member 1 with an outer magnet.
The outer peripheral surfaces of the outer magnets 2a, 2c, 2e, 2g, 2i, 2k, and 2m are magnetized so that the outer peripheral surface is the S pole and the inner peripheral surface of the magnet holding member 1 facing the cylindrical outer peripheral surface 1a is the N pole.
The outer magnets 2b, 2e, 2f, 2h, 2j, 2l, and 2n arranged adjacent to the outer magnets 2a, 2c, 2e, 2g, 2i, 2k, and 2m have an outer peripheral surface of N pole and a cylinder of the magnet holding member 1. The inner peripheral surface facing the outer peripheral surface 1a is magnetized so as to be an S pole.
4a, 4b, 4c, 4d, 4e, 4f, 4g, 4h, 4i, 4j, 4k, 4l, 4m, 4n are relaxation members made of soft magnetic material, which are between the outer magnets 2a and 2b and the outer magnet 2b, respectively. Between 2c, between outer magnets 2c and 2d, between outer magnets 2d and 2e, between outer magnets 2e and 2f, between outer magnets 2f and 2g, between outer magnets 2g and 2h, between outer magnets 2h and 2i Between the outer magnets 2i and 2j, between the outer magnets 2j and 2k, between the outer magnets 2k and 2l, between the outer magnets 2l and 2m, between the outer magnets 2m and 2n, between the outer magnets 2n and 2a. Have been placed.
The outer magnet layer is formed by the outer magnets 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i, 2j, 2k, 2l, 2m, and 2n.
3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n are inner magnets that are fan-shaped permanent magnets, and the inner circumference of the cylinder 1b of the magnet holding member 1 It is stuck to.
The inner magnets 3a, 3c, 3e, 3g, 3i, 3k, and 3m are magnetized so that the inner peripheral surface of the magnet holding member 1 facing the inner peripheral surface 1b of the cylinder is the S pole and the inner peripheral surface is the N pole. There is.
The inner magnets 3a, 3c, 3e, 3g, 3i, 3k, and 3m are arranged so as to have the same angle range as the outer magnets 2a, 2c, 2e, 2g, 2i, 2k, and 2m, respectively.
The inner magnets 3b, 3d, 3f, 3h, 3j, 3l, and 3n are magnetized so that the inner peripheral surface of the magnet holding member 1 facing the cylindrical inner peripheral surface 1b is the north pole and the inner peripheral surface is the south pole. There is.
The inner magnets 3b, 3d, 3f, 3h, 3j, 3l, and 3n are arranged so as to have the same angle range as the outer magnets 2b, 2d, 2f, 2h, 2j, 2l, and 2n, respectively.
Further, the outer magnets 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i, 2j, 2k, 2l, 2m, 2n and the inner magnets 3a, 3b, 3c corresponding to each other in the same angular range in the circumferential direction. , 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n and the relaxation members 4a, 4b, 4c, which are arranged so as to form the same magnetic field, respectively. 4d, 4e, 4f, 4g, 4h, 4i, 4j, 4k, 4l, 4m, 4n are between the inner magnets 3a and 3b, between the inner magnets 3b and 3c, between the inner magnets 3c and 3d, and the inner magnets, respectively. Between 3d and 3e, between inner magnets 3e and 3f, between inner magnets 3f and 3g, between inner magnets 3g and 3h, between inner magnets 3h and 3i, between inner magnets 3i and 3j, with inner magnets 3j It is arranged between 3k, between the inner magnets 3k and 3l, between the inner magnets 3l and 3m, between the inner magnets 3m and 3n, and between the inner magnets 3n and 3a.
Inner magnets 3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n form an inner magnet layer.
One end of the reluctance member 4a faces the outer peripheral surface of the outer magnet layer and faces the outer magnetic pole portion described later with a gap, and the other end faces the inner peripheral surface of the inner magnet layer and has a gap in the inner magnetic pole portion described later. A facing inner magnetic pole facing portion 4ab is provided.
One end of the reluctance member 4b faces the outer peripheral surface of the outer magnet layer and faces the outer magnetic pole portion described later with a gap, and the other end faces the inner peripheral surface of the inner magnet layer and has a gap in the inner magnetic pole portion described later. A facing inner magnetic pole facing portion 4bb is provided.
One end of the reluctance member 4c faces the outer peripheral surface of the outer magnet layer and faces the outer magnetic pole portion described later with a gap, and the other end faces the inner peripheral surface of the inner magnet layer and has a gap in the inner magnetic pole portion described later. A facing inner magnetic pole facing portion 4 kb is provided.
One end of the reluctance member 4d faces the outer peripheral surface of the outer magnet layer and faces the outer magnetic pole portion described later with a gap, and the other end faces the inner peripheral surface of the inner magnet layer and has a gap in the inner magnetic pole portion described later. A facing inner magnetic pole facing portion 4db is provided.
One end of the reluctance member 4e faces the outer peripheral surface of the outer magnet layer and faces the outer magnetic pole portion described later with a gap, and the other end faces the inner peripheral surface of the inner magnet layer and has a gap in the inner magnetic pole portion described later. A facing inner magnetic pole facing portion 4eb is provided.
One end of the reluctance member 4f faces the outer peripheral surface of the outer magnet layer and faces the outer magnetic pole portion described later with a gap, and the other end faces the inner peripheral surface of the inner magnet layer and has a gap in the inner magnetic pole portion described later. A facing inner magnetic pole facing portion 4fb is provided.
One end of the relaxation member 4g faces the outer peripheral surface of the outer magnet layer and faces the outer magnetic pole portion described later with a gap, and the other end faces the inner peripheral surface of the inner magnet layer and has a gap in the inner magnetic pole portion described later. It is provided with 4 gb of facing inner magnetic poles facing each other.
One end of the reluctance member 4h faces the outer peripheral surface of the outer magnet layer and faces the outer magnetic pole portion described later with a gap, and the other end faces the inner peripheral surface of the inner magnet layer and has a gap in the inner magnetic pole portion described later. A facing inner magnetic pole facing portion 4hb is provided.
One end of the reluctance member 4i faces the outer peripheral surface of the outer magnet layer and faces the outer magnetic pole portion described later with a gap, and the other end faces the inner peripheral surface of the inner magnet layer and has a gap in the inner magnetic pole portion described later. A facing inner magnetic pole facing portion 4ib is provided.
One end of the reluctance member 4j faces the outer peripheral surface of the outer magnet layer and faces the outer magnetic pole portion described later with a gap, and the other end faces the inner peripheral surface of the inner magnet layer and has a gap in the inner magnetic pole portion described later. A facing inner magnetic pole facing portion 4jb is provided.
One end of the reluctance member 4k faces the outer peripheral surface of the outer magnet layer and faces the outer magnetic pole portion described later with a gap, and the other end faces the inner peripheral surface of the inner magnet layer and has a gap in the inner magnetic pole portion described later. It is provided with a facing inner magnetic pole facing portion 4 kb.
One end of the reluctance member 4l faces the outer peripheral surface of the outer magnet layer and faces the outer magnetic pole portion described later with a gap, and the other end faces the inner peripheral surface of the inner magnet layer and has a gap in the inner magnetic pole portion described later. It is provided with 4 lbs of facing inner magnetic poles facing each other.
One end of the reluctance member 4m faces the outer peripheral surface of the outer magnet layer and faces the outer magnetic pole portion described later with a gap, and the other end faces the inner peripheral surface of the inner magnet layer and has a gap in the inner magnetic pole portion described later. It is provided with a facing inner magnetic pole facing portion 4 mb.
One end of the reluctance member 4n faces the outer peripheral surface of the outer magnet layer and faces the outer magnetic pole portion described later with a gap, and the other end faces the inner peripheral surface of the inner magnet layer and has a gap in the inner magnetic pole portion described later. A facing inner magnetic pole facing portion 4nb is provided.
Outer magnet layer consisting of magnet holding member 1 and outer magnets 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i, 2j, 2k, 2l, 2m, 2n, inner magnets 3a, 3b, 3c, 3d, Inner magnet layer consisting of 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n and reluctance members 4a, 4b, 4c, 4d, 4e, 4f, 4g, 4h, 4i, 4j, 4k, The rotor is formed of 4l, 4m, and 4n.
The magnet holding member 1 is rotatably attached to a base stator described later.
The surface magnetic flux densities of the outer magnets 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i, 2j, 2k, 2l, 2m, 2n are the inner magnets 3a, 3b, 3c, 3d, 3e, 3f, 3g, It is magnetized so as to be higher than the surface magnetic flux densities of 3h, 3i, 3j, 3k, 3l, 3m, and 3n.
Reference numeral 5 denotes a base stator made of a soft magnetic material, in which an outer magnetic pole portion 5a facing the magnetized portion on the outer peripheral side of the outer magnet layer with a gap is arranged every 30 degrees with a circumference divided into 12 and an inner magnetic pole portion 5b. Is opposed to the magnetized portion on the inner peripheral side of the inner magnetized layer with a gap, and is arranged every 30 degrees with the circumference divided into 12 in the same angle range as the outer magnetic pole portion 5a. The outer magnetic pole portion 5a and the inner magnetic pole portion 5b are magnetically connected by a connecting portion 5c to form a magnetic circuit.
As shown in the figure, this base stator constitutes a stator that connects a plurality of outer magnetic pole portions and inner magnetic pole portions facing each other in the same angle range with a gap sandwiching the permanent magnets via a connecting portion.
Depending on the rotation phase of the rotor, the reluctance members 4a, 4b, 4c, 4d, 4e, 4f, 4g, 4h, 4i, 4j, 4k, 4l, 4m, 4n and the outer magnetic pole portion 5a, the inner magnetic pole portion 5b, and the connecting portion. A magnetic path with an air gap is formed at 5c.
6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 and 17 are outer coils, and outer coil 6, outer coil 8, outer coil 10, outer coil 12, outer coil 14, outer coil 16 , The outer coil 7, the outer coil 9, the outer coil 10, the outer coil 13, the outer coil 15, and the outer coil 17 in the circumferential direction between the outer magnetic pole portion 5a and the connecting portion 5c of the base stator 5 and the outer magnet 2a. , 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i, 2j, 2k, 2l, 2m, 2n are arranged side by side in the axial direction, and the outer magnetic pole portion is wound so as to be excitable.
The outer coils 6 and 12 and the outer coils 9 and 15 are excited at the same time, but because the winding directions are opposite, the outer magnetic pole 5a excited by the outer coils 6 and 12 and the outer magnetic pole 5a excited by the outer coils 9 and 15 Are excited to different polarities from each other.
The outer coils 7 and 13 and the outer coils 10 and 16 are excited at the same time, but because the winding directions are opposite, the outer magnetic pole portion 5a excited by the outer coils 7 and 13 and the outer magnetic pole portion 5a excited by the outer coils 10 and 16 Are excited to different polarities from each other.
The outer coils 8 and 14 and the outer coils 11 and 17 are excited at the same time, but because the winding directions are opposite, the outer magnetic pole 5a excited by the outer coils 8 and 14 and the outer magnetic pole 5a excited by the outer coils 11 and 17 Are excited to different polarities from each other.
18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 are inner coils, and the inner coil 18 is permanent in the same angle range as the outer magnetic pole 5a around which the outer coil 6 is wound. The inner magnets 3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l between the inner magnetic poles 5b and the connecting 5c facing the inner peripheral surface of the magnet with a gap. , 3m and 3n are arranged side by side in the axial direction, and the inner magnetic pole portion 5b is wound around the inner magnetic pole portion 5b at a pole different from that of the outer coil 6 for exciting the outer magnetic pole 5a at the same time.
The inner coil 19 sandwiches a permanent magnet in the same angle range as the outer magnetic pole 5a around which the outer coil 7 is wound, and the inner magnet 3a is located between the inner magnetic pole portion 5b and the connecting portion 5c facing the inner peripheral surface of the permanent magnet with a gap. , 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n are arranged side by side in the axial direction, and the outer coil 7 excites the outer magnetic pole 5a on the inner magnetic pole portion 5b. It is wound so that it can be excited at the same time with a pole different from that of the magnet.
The inner coil 20 sandwiches a permanent magnet in the same angle range as the outer magnetic pole 5a around which the outer coil 8 is wound, and the inner magnet 3a is located between the inner magnetic pole portion 5b and the connecting portion 5c facing the inner peripheral surface with a gap. , 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n are arranged side by side in the axial direction, and the outer coil 8 excites the outer magnetic pole 5a on the inner magnetic pole portion 5b. It is wound so that it can be excited at the same time with a pole different from that of the magnet.
The inner coil 21 sandwiches a permanent magnet in the same angle range as the outer magnetic pole 5a around which the outer coil 9 is wound, and the inner magnet 3a is located between the inner magnetic pole portion 5b and the connecting portion 5c facing the inner peripheral surface of the permanent magnet with a gap. , 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n are arranged side by side in the axial direction, and the outer coil 9 excites the outer magnetic pole 5a on the inner magnetic pole portion 5b. It is wound so that it can be excited at the same time with a pole different from that of the magnet.
The inner coil 22 sandwiches a permanent magnet in the same angle range as the outer magnetic pole 5a around which the outer coil 10 is wound, and the inner magnet 3a is located between the inner magnetic pole portion 5b and the connecting portion 5c facing the inner peripheral surface of the permanent magnet with a gap. , 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n are arranged side by side in the axial direction, and the outer coil 10 excites the outer magnetic pole 5a on the inner magnetic pole portion 5b. It is wound so that it can be excited at the same time with a pole different from that of the magnet.
The inner coil 23 sandwiches a permanent magnet in the same angle range as the outer magnetic pole 5a around which the outer coil 10 is wound, and the inner magnet 3a is located between the inner magnetic pole portion 5b and the connecting portion 5c facing the inner peripheral surface with a gap. , 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n are arranged side by side in the axial direction, and the outer coil 10 excites the outer magnetic pole 5a on the inner magnetic pole portion 5b. It is wound so that it can be excited at the same time with a pole different from that of the magnet.
The inner coil 24 has a permanent magnet in the same angle range as the outer magnetic pole 5a around which the outer coil 12 is wound, and the inner magnet 3a is located between the inner magnetic pole portion 5b and the connecting portion 5c facing the inner peripheral surface of the permanent magnet with a gap. , 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n are arranged side by side in the axial direction, and the outer coil 12 excites the outer magnetic pole 5a on the inner magnetic pole portion 5b. It is wound so that it can be excited at the same time with a pole different from that of the magnet.
The inner coil 25 sandwiches a permanent magnet in the same angle range as the outer magnetic pole 5a around which the outer coil 13 is wound, and the inner magnet 3a is located between the inner magnetic pole portion 5b and the connecting portion 5c facing the inner peripheral surface with a gap. , 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n are arranged side by side in the axial direction, and the outer coil 13 excites the outer magnetic pole 5a on the inner magnetic pole portion 5b. It is wound so that it can be excited at the same time with a pole different from that of the magnet.
The inner coil 26 sandwiches a permanent magnet in the same angle range as the outer magnetic pole 5a around which the outer coil 14 is wound, and the inner magnet 3a is located between the inner magnetic pole portion 5b and the connecting portion 5c facing the inner peripheral surface of the permanent magnet with a gap. , 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n are arranged side by side in the axial direction, and the outer coil 14 excites the outer magnetic pole 5a on the inner magnetic pole portion 5b. It is wound so that it can be excited at the same time with a pole different from that of the magnet.
The inner coil 27 sandwiches a permanent magnet in the same angle range as the outer magnetic pole 5a around which the outer coil 15 is wound, and the inner magnet 3a is located between the inner magnetic pole portion 5b and the connecting portion 5c facing the inner peripheral surface of the permanent magnet with a gap. , 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n are arranged side by side in the axial direction, and the outer coil 15 excites the outer magnetic pole 5a on the inner magnetic pole portion 5b. It is wound so that it can be excited at the same time with a pole different from that of the magnet.
The inner coil 28 sandwiches a permanent magnet in the same angle range as the outer magnetic pole 5a around which the outer coil 16 is wound, and the inner magnet 3a is located between the inner magnetic pole portion 5b and the connecting portion 5c facing the inner peripheral surface of the permanent magnet with a gap. , 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n are arranged side by side in the axial direction, and the outer coil 16 excites the outer magnetic pole 5a on the inner magnetic pole portion 5b. It is wound so that it can be excited at the same time with a pole different from that of the magnet.
The inner coil 29 sandwiches a permanent magnet in the same angle range as the outer magnetic pole 5a around which the outer coil 17 is wound, and the inner magnet 3a is located between the inner magnetic pole portion 5b and the connecting portion 5c facing the inner peripheral surface of the permanent magnet with a gap. , 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n are arranged side by side in the axial direction, and the outer coil 17 excites the outer magnetic pole 5a on the inner magnetic pole portion 5b. It is wound so that it can be excited at the same time with a pole different from that of the magnet.
The base stator 5 is rotatably held by the shaft portion 1c of the magnet holding member 1 at the 3d portion.
The wire diameters of the outer coils 6,7,8,9,10,11,12,13,14,15,16,17 are d1, and the inner coils 18,19,20,21,22,23,24,25 , 26, 27, 28, 29, where d2 is assumed, d1> d2.
The outer coils 6, 12, 9, and 15 are the first outer coil in the claim, and the inner coils 18, 24, 21, and 27 are the first inner coils in the claim, and the first outer coil and the first inner coil are used. Consists of the U phase of a three-phase brushless motor.
The outer magnetic pole 5a excited by the outer coils 6, 12, 9, 15 is the first outer magnetic pole portion, and the inner magnetic pole 5b excited by the inner coils 18, 24, 21, 27 is the first inner magnetic pole portion. The first outer magnetic pole portion, the first inner magnetic pole portion, and the connecting portion 5c form form the first stator.
Outer coils 7, 13, 10, 16 are the second outer coil in the claim, and inner coils 19, 25, 22, 28 are the second inner coil in the claim, and the second outer coil and the second inner coil. Consists of the V phase of a three-phase brushless motor.
The outer magnetic pole 5a excited by the outer coils 7, 13, 10, 16 is the second outer magnetic pole portion, and the inner magnetic pole 5b excited by the inner coils 19, 25, 22, 28 is the second inner magnetic pole portion. The second outer magnetic pole portion, the second inner magnetic pole portion, and the connecting portion 5c portion form a second stator.
The outer coils 8, 14, 11, and 17 are the third outer coil in the claim, and the inner coils 20, 26, 23, and 29 are the third inner coil in the claim, and the third outer coil and the third inner coil. Consists of the W phase of a three-phase brushless motor.
The outer magnetic pole 5a excited by the outer coils 8, 14, 11, 17 is the third outer magnetic pole portion, and the inner magnetic pole 5b excited by the inner coils 20, 26, 23, 29 is the third inner magnetic pole portion. The third outer magnetic pole portion, the third inner magnetic pole portion, and the connecting portion 5c portion form a third stator.
FIG. 2 shows a cross section at the time of assembly.
3 and 4 are plan sectional views of the permanent magnets.
In the state shown in FIG. 3, the outer coils 6, 12, 9, 15 which are the first outer coils and the inner coils 18, 24, 21, 27 which are the first inner coils are energized and excited by those coils. The first outer magnetic pole 5a and the first inner magnetic pole 5b are in an excited state, and the outer coils 7, 13, 10, 16 which are the second outer coils and the inner coils 19, 25, which are the second inner coils, When the second outer magnetic pole 5a and the second inner magnetic pole 5b excited by the coils are energized and the second outer magnetic pole 5a and the second inner magnetic pole 5b are in an excited state, the interlinkage magnetic flux between the outer magnet layer and the inner magnet layer made of permanent magnets is generated. It shows the phase of the rotor when it becomes the maximum phase.
In the state shown in FIG. 4, the outer coils 6, 12, 9, 15 which are the first outer coils and the inner coils 18, 24, 21, 27 which are the first inner coils are energized and excited by those coils. The first outer magnetic pole 5a and the first inner magnetic pole 5b are in an excited state, and the outer coils 7, 13, 10, 16 which are the second outer coils and the inner coils 19, 25, 22 which are the second inner coils are in an excited state. , 28 are energized and the second outer magnetic pole 5a and the second inner magnetic pole 5b excited by the coils are in an excited state, and the relaxation members 4a, 4b, 4c, 4d, 4e, 4f, 4g, 4h , 4i, 4j, 4k, 4l, 4m, 4n show the rotor phase in a state where the relaxation of the magnetic path is minimized and the rotor phase is in a stable state.
FIG. 5 is a block diagram showing a control circuit and coil connection, and Tr1, Tr2, Tr3, Tr4, Tr5, and Tr6 are Y-shaped connection three-phase motor drive circuits known for transistors, respectively. FIG. 6 is a coil excitation table showing the excitation state of the coil according to the energization sequence. The energization is switched from the first state to the second state, the third state, the fourth state, the fifth state, and the sixth state to excite the U phase, the V phase, and the W phase, respectively, to rotate the motor.
In FIG. 5, the outer coil 6, the inner coil 18, the outer coil 7, the inner coil 19, the outer coil 8, the inner coil 20, the outer coil 9, the inner coil 21, the outer coil 10, the inner coil 22, and the outer coil 22 are shown. Coil 11 and inner coil 23, outer coil 12 and inner coil 24, outer coil 13 and inner coil 25, outer coil 14 and inner coil 26, outer coil 15 and inner coil 27, outer coil 16 and inner coil 28, the outer coil 17 and the inner coil 29 are connected in parallel, respectively.
Since it is configured so that d1> d2, the current flowing through the coil is also larger in the outer coil than in the inner coil, and the outer magnetic flux portion 5a is the outer coil 6,7,8,9,10,11,12,13,14. , 15, 16 and 17 generate magnetic flux when the inner magnetic pole 5c is excited by the inner coils 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28 and 29. It will be more than the generated magnetic flux.
FIG. 7 shows the magnetized state of the permanent magnet 1, and the magnetic flux is indicated by an arrow.
As shown in FIG. 7, the total number of surface magnetic fluxes of the outer magnets 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i, 2j, 2k, 2l, 2m, 2n of the rotor is the inner magnets 3a, 3b, 3c, It is set higher than the total number of surface magnetic fluxes of 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n, and the outer magnets 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h. , 2i, 2j, 2k, 2l, 2m, 2n generate a large amount of magnetic flux Outer magnetic pole portion 3a, inner magnet 3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l , 3m, 3n are opposed to the inner magnetic pole portion 5b, which generates a smaller magnetic flux than the outer magnetic pole portion 5a, so that a well-balanced and efficient driving force is generated.
Rotor outer magnets 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i, 2j, 2k, 2l, 2m, 2n outer magnetized layers and inner magnets 3a, 3b, 3c, 3d, 3e, 3f , 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n Since the magnetic field is applied to both surfaces of the inner magnetizing layer, a higher driving force can be generated as compared with the conventional configuration.
The outer magnets 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i, 2j, 2k, 2l, 2m, 2n face the outer magnetic pole 5a, and the inner magnets 3a, 3b, 3c face the inner magnetic pole 5b. , 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n are configured to face each other, so the thickness of the magnet is compared to the case where the outer magnet and the inner magnet are integrally configured. The magnet can be made thin. Further, when the magnet holding member 1 is made of resin, the weight of the rotor can be reduced, and the reluctance members 4a, 4b, 4c, 4d, 4e, 4f, 4g, 4h, 4i, 4j, which are made of soft magnetic material, can be made lighter. Since the change in reluctance in the rotor rotation phase when the magnetic path is formed by 4k, 4l, 4m, and 4n can be made large, the reluctance torque can be increased.

三相ブラシレスモータの駆動の効率アップに適する構造Structure suitable for improving the efficiency of driving a three-phase brushless motor

１は磁石保持部材
１ａは外周円筒部、１ｂは内周円筒部
２ａ，２ｂ，２ｃ，２ｄ，２ｅ，２ｆ，２ｇ，２ｈ，２ｉ，２ｊ，２ｋ，２ｌ，２ｍ，２ｎは外側磁石
３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ，３ｇ，３ｈ，３ｉ，３ｊ，３ｋ，３ｌ，３ｍ，３ｎは内側磁石
４ａ，４ｂ，４ｃ，４ｄ，４ｅ，４ｆ，４ｇ，４ｈ，４ｉ，４ｊ，４ｋ，４ｌ，４ｍ，４ｎはリラクタンス部材
５はベースステータ
５ａは外側磁極部
５ｂは内側磁極部
５ｃは連結部
６，７，８，９，１０，１１，１１，１３，１４，１５，１６、１７は外側コイル
１８、１９、２０、２１、２２、２３、２４、２５、２６、２７、２８、２９は内側コイル1 is the outer peripheral cylindrical part of the magnet holding member 1a, 1b is the inner peripheral cylindrical part 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i, 2j, 2k, 2l, 2m, 2n are the outer magnets 3a, 3b. , 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n are inner magnets 4a, 4b, 4c, 4d, 4e, 4f, 4g, 4h, 4i, 4j, 4k, 4l. , 4m, 4n is the reluctance member 5, the base stator 5a is the outer magnetic pole part 5b, the inner magnetic pole part 5c is the connecting part 6,7,8,9,10,11,11,13,14,15,16,17 is the outside. Cylinders 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 are inner coils.

Claims (1)

円筒形状の磁石保持部材と、該磁石保持部材の外周面に複数の扇型板形状であり軟磁性材料からなる隣り合う磁石とは異なる極性に着磁された永久磁石が交互に設けられて構成される外側磁石層と、該磁石保持部材の内周面に前記外側磁石層と同じ方向の磁界となるように配置された複数の扇型板形状であり隣り合う磁石とは異なる極性に着磁された永久磁石が交互に設けられて構成される内側磁石層と、一端を前記外側磁石層の外周面と同方向に向けられた外側磁極対向部ともう一端を前記内側磁石層の内周面と同方向に向けられた内側磁極対向部とを持ち前記外側磁石層を形成する各磁石の隣り合う境界面並びに前記内側磁石層を形成する各磁石の隣り合う境界面に挿入された軟磁性材料で形成されたリラクタンス部材とからなるロータと、
軟磁性材料からなり該ロータの外側磁石層の外周面に隙間をもって対向する第１の外側磁極部と該ロータの内側磁石層の内周面に隙間をもって対向する第１の内側磁極部と該第１の内側磁極部と前記第１の外側磁極部とをつなぐ連結部を持つ第１ステータと、
前記第１ステータの第１の外側磁極部と連結部の間であって前記ロータの外側磁石層とは軸方向に並んで配置され第１ステータに巻回され第１の外側磁極部を励磁する第１の外側コイルと、
前記第１ステータの第１の内側磁極部と連結部の間に前記ロータの内側磁石層とは軸方向に並んで配置され第１ステータに巻回され第１の外側磁極と異なる極性に第１の内側磁極部を励磁する第１の内側コイルと、
軟磁性材料からなり該ロータの外側磁石層の外周面に隙間をもって対向する第２の外側磁極部と該ロータの内側磁石層の内周面に隙間をもって対向する第２の内側磁極部と該第２の内側磁極部と前記第２の外側磁極部とをつなぐ連結部を持つ第２ステータと、
前記第２ステータの第２の外側磁極部と連結部の間であって前記ロータの外側磁石層とは軸方向に並んで配置され第２ステータに巻回され第２の外側磁極部を励磁する第２の外側コイルと、
前記第２ステータの第２の内側磁極部と連結部の間に前記ロータの内側磁石層とは軸方向に並んで配置され第２ステータに巻回され第２の外側磁極と異なる極性に第２の内側磁極部を励磁する第２の内側コイルと、
軟磁性材料からなり該ロータの外側磁石層の外周面に隙間をもって対向する第３の外側磁極部と該ロータの内側磁石層の内周面に隙間をもって対向する第３の内側磁極部と該第３の内側磁極部と前記第３の外側磁極部とをつなぐ連結部を持つ第３ステータと、
前記第３ステータの第３の外側磁極部と連結部の間であって前記ロータの外側磁石層とは軸方向に並んで配置され第３ステータに巻回され第３の外側磁極部を励磁する第３の外側コイルと、
前記第３ステータの第３の内側磁極部と連結部の間であって前記ロータの内側磁石層とは軸方向に並んで配置され第３ステータに巻回され第３の外側磁極と異なる極性に第３の内側磁極部を励磁する第３の内側コイルと、
を備えたモータ。A cylindrical magnet holding member and a plurality of fan-shaped plate-shaped permanent magnets magnetized to different polarities from adjacent magnets made of a soft magnetic material are alternately provided on the outer peripheral surface of the magnet holding member. The outer magnet layer to be magnetized and a plurality of fan-shaped plates arranged on the inner peripheral surface of the magnet holding member so as to have a magnetic field in the same direction as the outer magnet layer, and magnetized to a different polarity from adjacent magnets. An inner magnet layer formed by alternately providing permanent magnets, an outer magnetic pole facing portion having one end directed in the same direction as the outer peripheral surface of the outer magnet layer, and an inner peripheral surface of the inner magnet layer at the other end. A soft magnetic material inserted into the adjacent interface of each magnet forming the outer magnet layer and the adjacent interface of each magnet forming the inner magnet layer, which has an inner magnetic pole facing portion oriented in the same direction as the above. A rotor made of a relaxation member made of
A first outer magnetic pole portion made of a soft magnetic material and facing the outer peripheral surface of the outer magnet layer of the rotor with a gap, a first inner magnetic pole portion facing the inner peripheral surface of the inner magnet layer of the rotor with a gap, and the first. A first stator having a connecting portion connecting the inner magnetic pole portion of 1 and the first outer magnetic pole portion,
Between the first outer magnetic pole portion of the first stator and the connecting portion, the outer magnet layer of the rotor is arranged side by side in the axial direction and wound around the first stator to excite the first outer magnetic pole portion. With the first outer coil,
The inner magnet layers of the rotor are arranged in an axial direction between the first inner magnetic pole portion and the connecting portion of the first stator, and are wound around the first stator to have a polarity different from that of the first outer magnetic pole. The first inner coil that excites the inner magnetic pole of the
A second outer magnetic pole portion made of a soft magnetic material and facing the outer peripheral surface of the outer magnet layer of the rotor with a gap, a second inner magnetic pole portion facing the inner peripheral surface of the inner magnet layer of the rotor with a gap, and the first A second stator having a connecting portion connecting the inner magnetic pole portion of 2 and the second outer magnetic pole portion,
Between the second outer magnetic pole portion of the second stator and the connecting portion, the outer magnet layer of the rotor is arranged side by side in the axial direction and wound around the second stator to excite the second outer magnetic pole portion. With the second outer coil,
The inner magnet layer of the rotor is arranged side by side in the axial direction between the second inner magnetic pole portion and the connecting portion of the second stator, and is wound around the second stator to have a polarity different from that of the second outer magnetic pole. The second inner coil that excites the inner magnetic pole of the
A third outer magnetic pole portion made of a soft magnetic material and facing the outer peripheral surface of the outer magnet layer of the rotor with a gap, a third inner magnetic pole portion facing the inner peripheral surface of the inner magnet layer of the rotor with a gap, and the first A third stator having a connecting portion connecting the inner magnetic pole portion of 3 and the third outer magnetic pole portion, and
Between the third outer magnetic pole portion of the third stator and the connecting portion, the outer magnet layer of the rotor is arranged side by side in the axial direction and wound around the third stator to excite the third outer magnetic pole portion. With the third outer coil,
Between the third inner magnetic pole portion and the connecting portion of the third stator, the inner magnet layer of the rotor is arranged side by side in the axial direction and wound around the third stator to have a polarity different from that of the third outer magnetic pole. A third inner coil that excites the third inner magnetic pole,
Motor equipped with.
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