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JP2008104278A - motor - Google Patents

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JP2008104278A
JP2008104278A JP2006284031A JP2006284031A JP2008104278A JP 2008104278 A JP2008104278 A JP 2008104278A JP 2006284031 A JP2006284031 A JP 2006284031A JP 2006284031 A JP2006284031 A JP 2006284031A JP 2008104278 A JP2008104278 A JP 2008104278A
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Prior art keywords
permanent magnet
sub
circumferential
stator
radial
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Shoei Abe
昇栄 阿部
Hirobumi Shin
博文 新
Keiichi Yamamoto
恵一 山本
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

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  • Permanent Magnet Type Synchronous Machine (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To make effective use of field flux generated by a permanent magnet of a rotor to increase the amount of linkage flux interlinked with the stator winding of a stator. <P>SOLUTION: The rotor 11 includes: a main permanent magnet attachment layer 21 to which multiple permanent magnets 21a, ..., 21a are attached; a first sub-permanent magnet attachment layer 22 to which multiple first radial sub-permanent magnets 22a, ..., 22a and first circumferential sub-permanent magnets 22b, ..., 22b and first yokes 22c, ..., 22c are attached; and a second permanent magnet attachment layer 23 to which multiple second radial sub-permanent magnets 23a, ..., 23a and second circumferential sub-permanent magnets 23b, ..., 23b and second yokes 23c, ..., 23c are attached. The first sub-permanent magnet attachment layer 22, the main permanent magnet attachment layer 21, and the second sub-permanent magnet attachment layer 23 are coaxially laminated in this order in the direction of the rotating shaft O. They are housed in a rotor frame 25 formed of a non-magnetic material. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、モータに関する。   The present invention relates to a motor.

従来、例えば回転軸方向の両側からロータを挟み込むようにして対向配置された１対のステータを備え、ロータの永久磁石による界磁磁束に対して、１対のステータを介した磁束ループを形成する軸ギャップ型の永久磁石発電機が知られている（例えば、特許文献１参照）。
特開２００１−１３６７２１号公報 2. Description of the Related Art Conventionally, for example, a pair of stators arranged opposite to each other so as to sandwich a rotor from both sides in the rotation axis direction is provided, and a magnetic flux loop via a pair of stators is formed with respect to a field magnetic flux generated by a permanent magnet of the rotor. An axial gap type permanent magnet generator is known (see, for example, Patent Document 1).
JP 2001-136721 A

ところで、上記従来技術の一例に係る永久磁石発電機においては、ロータの永久磁石による界磁磁束をいわば１対のステータ間で掃引するようにしてロータ内を直線的に貫通させることによってロータ内での磁束漏洩量を低減させ、ステータの固定子巻線を鎖交する鎖交磁束量を増大させるようになっている。そして、このような永久磁石発電機において、ステータの固定子巻線を鎖交する鎖交磁束量をさらに増大させて、トルクポテンシャルを増大させることが望まれている。   By the way, in the permanent magnet generator according to an example of the above prior art, the field magnetic flux generated by the permanent magnets of the rotor is swept between the pair of stators so as to be linearly penetrated through the rotor. The amount of magnetic flux leakage is reduced, and the amount of interlinkage magnetic flux interlinking the stator windings of the stator is increased. In such a permanent magnet generator, it is desired to further increase the torque potential by further increasing the amount of interlinkage magnetic flux interlinking the stator windings of the stator.

本発明は上記事情に鑑みてなされたもので、ロータの永久磁石による界磁磁束を有効利用して、ステータの固定子巻線を鎖交する鎖交磁束量を増大させることが可能なモータを提供することを目的とする。   The present invention has been made in view of the above circumstances, and a motor capable of increasing the amount of interlinkage magnetic flux interlinking the stator windings of the stator by effectively using the field magnetic flux generated by the permanent magnet of the rotor. The purpose is to provide.

上記課題を解決して係る目的を達成するために、請求項１に記載の発明のモータは、回転軸周りに回転可能とされたロータ（例えば、実施の形態でのロータ１１）と、回転軸方向の少なくとも一方側から前記ロータに対向配置されたステータ（例えば、実施の形態での第１ステータ１２および第２ステータ１３）を備えるアキシャルギャップ型のモータであって、前記ロータは、磁化方向が前記回転軸方向と平行になるようにして周方向に沿って配置された複数の主永久磁石（例えば、実施の形態での主永久磁石２１ａ）と、磁化方向が前記回転軸方向および径方向に直交する方向と平行になるようにして前記主永久磁石の端部近傍に配置された第１副永久磁石（例えば、実施の形態での第１径方向副永久磁石２２ａ、第２径方向副永久磁石２３ａ）と、磁化方向が前記径方向と平行になるようにして前記主永久磁石の端部近傍に配置された第２副永久磁石（例えば、実施の形態での第１周方向副永久磁石２２ｂ、第２周方向副永久磁石２３ｂ）とを備えることを特徴としている。   In order to solve the above problems and achieve the object, a motor according to a first aspect of the present invention includes a rotor (for example, the rotor 11 in the embodiment) that is rotatable around a rotation axis, and a rotation axis. An axial gap type motor including a stator (for example, the first stator 12 and the second stator 13 in the embodiment) disposed opposite to the rotor from at least one side of the direction, wherein the rotor has a magnetization direction A plurality of main permanent magnets (for example, the main permanent magnet 21a in the embodiment) arranged along the circumferential direction so as to be parallel to the rotation axis direction, and the magnetization directions in the rotation axis direction and the radial direction A first secondary permanent magnet (for example, the first radial secondary permanent magnet 22a and the second radial secondary permanent in the embodiment) disposed in the vicinity of the end of the main permanent magnet so as to be parallel to the orthogonal direction. magnet 3a) and a second secondary permanent magnet (for example, the first circumferential secondary permanent magnet 22b in the embodiment) disposed in the vicinity of the end of the main permanent magnet so that the magnetization direction is parallel to the radial direction. And a second circumferential sub-permanent magnet 23b).

上記構成のモータによれば、主永久磁石の端部近傍に、主永久磁石の磁化方向と直交する方向に磁化された第１副永久磁石および第２副永久磁石を備えることにより、所謂永久磁石のハルバッハ配置による磁束レンズ効果によって各永久磁石の磁束を収束させることができる。これにより、ステータの固定子巻線に鎖交する磁束量を増大させることができる。   According to the motor having the above-described configuration, the so-called permanent magnet is provided by providing the first sub permanent magnet and the second sub permanent magnet magnetized in the direction perpendicular to the magnetization direction of the main permanent magnet in the vicinity of the end of the main permanent magnet. The magnetic flux of each permanent magnet can be converged by the magnetic flux lens effect by the Halbach arrangement. Thereby, the amount of magnetic flux linked to the stator winding of the stator can be increased.

さらに、請求項２に記載の発明のモータは、各前記主永久磁石毎に前記第１副永久磁石が前記主永久磁石の前記周方向の端部近傍に配置され、各前記主永久磁石毎に前記第２副永久磁石が前記主永久磁石の前記径方向の端部近傍に配置されていることを特徴としている。   Furthermore, in the motor according to the second aspect of the present invention, the first secondary permanent magnet is disposed in the vicinity of the circumferential end portion of the main permanent magnet for each of the main permanent magnets. The second sub permanent magnet is arranged in the vicinity of the radial end of the main permanent magnet.

上記構成のモータによれば、磁化方向が回転軸方向および径方向に直交する方向と平行になるように設定された第１副永久磁石を主永久磁石の周方向の端部近傍に配置し、磁化方向が径方向と平行になるように設定された第２副永久磁石を主永久磁石の径方向の端部近傍に配置することにより、各永久磁石の磁束を効率よく収束させることができる。これにより、ステータの固定子巻線に鎖交する磁束量をより一層、増大させることができる。   According to the motor having the above configuration, the first sub permanent magnet set so that the magnetization direction is parallel to the direction orthogonal to the rotation axis direction and the radial direction is disposed in the vicinity of the end portion in the circumferential direction of the main permanent magnet, By disposing the second secondary permanent magnet set so that the magnetization direction is parallel to the radial direction in the vicinity of the radial end of the main permanent magnet, the magnetic flux of each permanent magnet can be converged efficiently. Thereby, the amount of magnetic flux linked to the stator winding of the stator can be further increased.

さらに、請求項３に記載の発明のモータでは、前記ステータは、回転軸方向の両側から前記ロータを挟み込むようにして対向配置された第１ステータおよび第２ステータ（例えば、実施の形態での第１ステータ１２および第２ステータ１３）を備えることを特徴としている。   Furthermore, in the motor according to the third aspect of the present invention, the stator includes a first stator and a second stator (for example, the first stator according to the embodiment) which are disposed to face each other so as to sandwich the rotor from both sides in the rotation axis direction. 1 stator 12 and 2nd stator 13).

上記構成のモータによれば、第１ステータおよび第２ステータによって回転軸方向の両側からロータを挟み込むことによって、ロータを回転させる回転磁界を精度良く発生させることができる。   According to the motor having the above configuration, the rotating magnetic field for rotating the rotor can be generated with high accuracy by sandwiching the rotor from both sides in the rotation axis direction by the first stator and the second stator.

さらに、請求項４に記載の発明のモータでは、前記主永久磁石は、前記第１副永久磁石および前記第２副永久磁石の少なくとも一方に対して相対的に高い残留磁束密度を有することを特徴としている。   Furthermore, in the motor of the invention according to claim 4, the main permanent magnet has a relatively high residual magnetic flux density with respect to at least one of the first sub permanent magnet and the second sub permanent magnet. It is said.

上記構成のモータによれば、少なくとも第１副永久磁石または第２副永久磁石に対して、主永久磁石の残留磁束密度を相対的に高くすることによって、ステータの固定子巻線に鎖交する磁束量を増大させることができる。   According to the motor having the above configuration, the residual magnetic flux density of the main permanent magnet is relatively increased with respect to at least the first secondary permanent magnet or the second secondary permanent magnet, thereby interlinking with the stator winding of the stator. The amount of magnetic flux can be increased.

さらに、請求項５に記載の発明のモータでは、前記第１副永久磁石および前記第２副永久磁石の少なくとも一方は、前記主永久磁石に対して相対的に高い保磁力を有すること特徴としている。   Furthermore, in the motor according to the fifth aspect of the present invention, at least one of the first sub permanent magnet and the second sub permanent magnet has a relatively high coercive force with respect to the main permanent magnet. .

上記構成のモータによれば、主永久磁石に対して、少なくとも第１副永久磁石または第２副永久磁石の保磁力を相対的に高くすることによって、主永久磁石に比べて相対的にステータからの磁界が反磁界となり易い第１副永久磁石または第２副永久磁石が、ステータからの磁界によって減磁されてしまうことを抑制することができる。   According to the motor having the above-described configuration, the coercive force of at least the first sub permanent magnet or the second sub permanent magnet is relatively increased with respect to the main permanent magnet, so that the stator is relatively dissipated compared to the main permanent magnet. It is possible to prevent the first sub-permanent magnet or the second sub-permanent magnet from being easily demagnetized from being demagnetized by the magnetic field from the stator.

請求項１に記載の発明のモータによれば、主永久磁石の端部近傍に、主永久磁石の磁化方向と直交する方向に磁化された第１副永久磁石および第２副永久磁石を備えることにより、所謂永久磁石のハルバッハ配置による磁束レンズ効果によって各永久磁石の磁束を収束させることができ、ステータの固定子巻線に鎖交する磁束量を増大させることができる。   According to the motor of the first aspect of the present invention, the first sub permanent magnet and the second sub permanent magnet magnetized in the direction perpendicular to the magnetization direction of the main permanent magnet are provided near the end of the main permanent magnet. Thus, the magnetic flux of each permanent magnet can be converged by the magnetic flux lens effect of the so-called permanent magnet Halbach arrangement, and the amount of magnetic flux interlinked with the stator winding of the stator can be increased.

さらに、請求項２に記載の発明のモータによれば、各永久磁石の磁束を効率よく収束させることができ、ステータの固定子巻線に鎖交する磁束量をより一層、増大させることができる。   Furthermore, according to the motor of the invention described in claim 2, the magnetic flux of each permanent magnet can be converged efficiently, and the amount of magnetic flux interlinked with the stator winding of the stator can be further increased. .

さらに、請求項３に記載の発明のモータによれば、ロータを回転させる回転磁界を精度良く発生させることができる。
さらに、請求項４に記載の発明のモータによれば、ステータの固定子巻線に鎖交する磁束量を増大させることができる。
さらに、請求項５に記載の発明のモータによれば、主永久磁石に比べて相対的にステータからの磁界が反磁界となり易い第１副永久磁石または第２副永久磁石が、ステータからの磁界によって減磁されてしまうことを抑制することができる。 Furthermore, according to the motor of the invention described in claim 3, a rotating magnetic field for rotating the rotor can be generated with high accuracy.
Furthermore, according to the motor of the invention described in claim 4, the amount of magnetic flux interlinked with the stator winding of the stator can be increased.
Furthermore, according to the motor of the invention described in claim 5, the first sub-permanent magnet or the second sub-permanent magnet, in which the magnetic field from the stator is relatively demagnetized compared to the main permanent magnet, is the magnetic field from the stator. Can be prevented from being demagnetized.

以下、本発明のモータの一実施形態について添付図面を参照しながら説明する。
本実施の形態によるモータ１０は、例えば図１および図２に示すように、このモータ１０の回転軸Ｏ周りに回転可能に設けられた略円板状のロータ１１と、回転軸Ｏ方向の両側からロータ１１を挟みこむようにして対向配置され、ロータ１１を回転させる回転磁界を発生する複数相の各固定子巻線を有する第１ステータ１２および第２ステータ１３とを備えるアキシャルギャップ型のモータである。
このモータ１０は、例えばハイブリッド車両や電動車両等の車両に駆動源として搭載され、出力軸（回転軸）がトランスミッション（図示略）の入力軸に接続されることで、モータ１０の駆動力がトランスミッションを介して車両の駆動輪（図示略）に伝達されるようになっている。
また、車両の減速時に駆動輪側からモータ１０に駆動力が伝達されると、モータ１０は発電機として機能していわゆる回生制動力を発生し、車体の運動エネルギーを電気エネルギー（回生エネルギー）として回収する。さらに、例えばハイブリッド車両においては、モータ１０の回転軸が内燃機関（図示略）のクランクシャフトに連結されると、内燃機関の出力がモータ１０に伝達された場合にもモータ１０は発電機として機能して発電エネルギーを発生する。 Hereinafter, an embodiment of a motor of the present invention will be described with reference to the accompanying drawings.
As shown in FIGS. 1 and 2, for example, the motor 10 according to the present embodiment includes a substantially disk-shaped rotor 11 that is rotatably provided around the rotation axis O of the motor 10, and both sides in the direction of the rotation axis O. Is an axial gap type motor that includes a first stator 12 and a second stator 13 that are arranged opposite to each other so as to sandwich the rotor 11 and that have a plurality of stator windings that generate a rotating magnetic field that rotates the rotor 11. .
This motor 10 is mounted as a drive source in a vehicle such as a hybrid vehicle or an electric vehicle, for example, and an output shaft (rotating shaft) is connected to an input shaft of a transmission (not shown), so that the driving force of the motor 10 is transmitted to the transmission. It is transmitted to the drive wheel (not shown) of the vehicle via.
When the driving force is transmitted from the driving wheel side to the motor 10 during deceleration of the vehicle, the motor 10 functions as a generator to generate a so-called regenerative braking force, and the kinetic energy of the vehicle body is used as electric energy (regenerative energy). to recover. Further, for example, in a hybrid vehicle, when the rotation shaft of the motor 10 is connected to a crankshaft of an internal combustion engine (not shown), the motor 10 functions as a generator even when the output of the internal combustion engine is transmitted to the motor 10. Power generation energy.

ロータ１１は、例えば図２に示すように、複数の主永久磁石２１ａ，…，２１ａが装着された主永久磁石装着層２１と、複数の第１径方向副永久磁石２２ａ，…，２２ａおよび第１周方向副永久磁石２２ｂ，…，２２ｂおよび第１ヨーク２２ｃ，…，２２ｃを具備する第１副永久磁石装着層２２と、複数の第２径方向副永久磁石２３ａ，…，２３ａおよび第２周方向副永久磁石２３ｂ，…，２３ｂおよび第２ヨーク２３ｃ，…，２３ｃを具備する第２副永久磁石装着層２３とを備えて構成されている。
そして、回転軸Ｏ方向に沿って同軸に、順次、第１副永久磁石装着層２２と、主永久磁石装着層２１と、第２副永久磁石装着層２３とが積層されるようにして、非磁性材からなるロータフレーム２５内に収容されている。 For example, as shown in FIG. 2, the rotor 11 includes a main permanent magnet mounting layer 21 on which a plurality of main permanent magnets 21a,..., 21a are mounted, a plurality of first radial sub-permanent magnets 22a,. , 22b and first yokes 22c,..., 22c, and a plurality of second radial sub-permanent magnets 23a,. , 23b and a second sub permanent magnet mounting layer 23 having second yokes 23c,..., 23c.
Then, the first secondary permanent magnet mounting layer 22, the main permanent magnet mounting layer 21, and the second secondary permanent magnet mounting layer 23 are sequentially laminated coaxially along the rotation axis O direction. It is accommodated in a rotor frame 25 made of a magnetic material.

ロータフレーム２５は、例えば図２に示すように、周方向に所定間隔をおいて配置された複数の径方向リブ３１，…，３１によって接続された内周側筒状部３２と外周側筒状部３３と、内周側筒状部３２の内周面上から内方に向かい突出する円環板状に形成され、外部の駆動軸に接続される接続部３４とを備えて構成されている。   For example, as shown in FIG. 2, the rotor frame 25 includes an inner peripheral cylindrical portion 32 and an outer peripheral cylindrical portion connected by a plurality of radial ribs 31,. And a connecting portion 34 that is formed in an annular plate shape that protrudes inward from the inner peripheral surface of the inner peripheral cylindrical portion 32 and is connected to an external drive shaft. .

そして、内周側筒状部３２の外周面上には、回転軸Ｏ方向の央部で径方向外方に向かい突出すると共に周方向に沿って伸びる内周側周方向突条３２ａと、周方向に所定間隔をおいた位置で径方向外方に向かい突出すると共に回転軸Ｏ方向に沿って伸びる複数の内周側軸方向突条３２ｂ，…，３２ｂとが設けられている。   And on the outer peripheral surface of the inner peripheral side cylindrical portion 32, an inner peripheral side circumferential ridge 32a that protrudes radially outward at the center of the rotation axis O direction and extends along the circumferential direction, A plurality of inner circumferential axial ridges 32b,..., 32b projecting radially outward at predetermined intervals in the direction and extending along the rotation axis O direction are provided.

また、外周側筒状部３３の内周面上には、内周側周方向突条３２ａに対向するようにして回転軸Ｏ方向の央部で径方向内方に向かい突出すると共に周方向に沿って伸びる外周側周方向突条３３ａと、各内周側軸方向突条３２ｂ，…，３２ｂに対向するようにして周方向に所定間隔をおいた位置で径方向内方に向かい突出すると共に回転軸Ｏ方向に沿って伸びる複数の外周側軸方向突条３３ｂ，…，３３ｂとが設けられている。   Further, on the inner peripheral surface of the outer peripheral side tubular portion 33, it protrudes radially inward at the center of the rotation axis O direction so as to face the inner peripheral side circumferential protrusion 32 a and in the circumferential direction. The outer circumferential side circumferential ridge 33a extends along the inner circumferential side axial ridges 32b, ..., 32b, and projects radially inward at a predetermined interval in the circumferential direction. A plurality of outer peripheral side axial protrusions 33b,..., 33b extending along the rotation axis O direction are provided.

そして、各突条３２ａ，３２ｂの径方向での突出高さおよび各突条３３ａ，３３ｂの径方向での突出高さは各同等とされている。
そして、径方向リブ３１は、各突条３２ａ，３２ｂの交差部と、各突条３３ａ，３３ｂの交差部とを接続するようにして配置されている。 And the protrusion height in the radial direction of each protrusion 32a, 32b and the protrusion height in the radial direction of each protrusion 33a, 33b are made equal.
And the radial direction rib 31 is arrange | positioned so that the intersection part of each protrusion 32a, 32b and the intersection part of each protrusion 33a, 33b may be connected.

主永久磁石装着層２１は、ロータフレーム２５の内周側周方向突条３２ａと外周側周方向突条３３ａと径方向リブ３１とによって形成された複数（例えば、１２個等）の主磁石装着部毎に略扇型板状の主永久磁石２１ａが装着されて構成されている。   The main permanent magnet mounting layer 21 has a plurality of (for example, twelve) main magnet mountings formed by the inner circumferential circumferential ridge 32a, the outer circumferential circumferential ridge 33a, and the radial ribs 31 of the rotor frame 25. A substantially fan-shaped main permanent magnet 21a is mounted for each part.

主永久磁石２１ａは、厚さ方向（つまり、回転軸Ｏ方向）に磁化されており、周方向で隣り合う２つの主永久磁石２１ａ，２１ａは、互いに磁化方向が異方向となるように設定されている。すなわち、回転軸Ｏ方向の一方側がＮ極とされた主永久磁石２１ａには、回転軸Ｏ方向の一方側がＳ極とされた主永久磁石２１ａが径方向リブ３１を介して周方向で隣り合うようになっている。   The main permanent magnet 21a is magnetized in the thickness direction (that is, the direction of the rotation axis O), and the two main permanent magnets 21a and 21a adjacent in the circumferential direction are set so that the magnetization directions are different from each other. ing. That is, the main permanent magnet 21 a whose one side in the direction of the rotation axis O is N pole is adjacent to the main permanent magnet 21 a whose one side in the direction of the rotation axis O is S pole in the circumferential direction via the radial ribs 31. It is like that.

主永久磁石装着層２１を回転軸Ｏ方向の両側から挟みこむ第１副永久磁石装着層２２および第２副永久磁石装着層２３は、ロータフレーム２５の各軸方向突条３２ｂ，３３ｂによって各副永久磁石２２ａ，２２ｂ，２３ａ，２３ｂが保持されると共に、各副永久磁石２２ａ，２２ｂ，２３ａ，２３ｂによって形成されたヨーク装着部に各ヨーク２２ｃ，２３ｃが装着されて構成されている。   The first sub-permanent magnet mounting layer 22 and the second sub-permanent magnet mounting layer 23 that sandwich the main permanent magnet mounting layer 21 from both sides in the direction of the rotation axis O are respectively connected by the axial ridges 32b and 33b of the rotor frame 25. The permanent magnets 22a, 22b, 23a, 23b are held, and the yokes 22c, 23c are mounted on the yoke mounting portions formed by the sub permanent magnets 22a, 22b, 23a, 23b.

第１副永久磁石装着層２２では、第１径方向副永久磁石２２ａは、径方向で対向する内周側軸方向突条３２ｂと外周側軸方向突条３３ｂとにより径方向の両側から挟み込まれている。また、径方向で対をなす１対の第１周方向副永久磁石２２ｂ，２２ｂのうち、内周側の第１周方向副永久磁石２２ｂは、周方向で隣り合う内周側軸方向突条３２ｂ，３２ｂにより周方向の両側から挟み込まれ、外周側の第１周方向副永久磁石２２ｂは、周方向で隣り合う外周側軸方向突条３３ｂ，３３ｂにより周方向の両側から挟み込まれている。   In the first sub permanent magnet mounting layer 22, the first radial sub permanent magnet 22a is sandwiched from both sides in the radial direction by the radially opposing inner circumferential axial protrusion 32b and the outer circumferential axial protrusion 33b. ing. Of the pair of first circumferential sub-permanent magnets 22b, 22b that form a pair in the radial direction, the inner circumferential first auxiliary permanent magnet 22b is an inner circumferential axial ridge that is adjacent in the circumferential direction. 32b, 32b is sandwiched from both sides in the circumferential direction, and the first circumferential sub-permanent magnet 22b on the outer circumferential side is sandwiched from both sides in the circumferential direction by outer circumferential axial protrusions 33b, 33b adjacent in the circumferential direction.

また、第２副永久磁石装着層２３では、第２径方向副永久磁石２３ａは、径方向で対向する内周側軸方向突条３２ｂと外周側軸方向突条３３ｂとにより径方向の両側から挟み込まれている。また、径方向で対をなす１対の第２周方向副永久磁石２３ｂ，２３ｂのうち、内周側の第２周方向副永久磁石２３ｂは、周方向で隣り合う内周側軸方向突条３２ｂ，３２ｂにより周方向の両側から挟み込まれ、外周側の第２周方向副永久磁石２３ｂは、周方向で隣り合う外周側軸方向突条３３ｂ，３３ｂにより周方向の両側から挟み込まれている。   Further, in the second sub permanent magnet mounting layer 23, the second radial sub permanent magnet 23a is formed from both sides in the radial direction by the inner peripheral side axial protrusion 32b and the outer peripheral side axial protrusion 33b opposed in the radial direction. It is sandwiched. Of the pair of second circumferential sub-permanent magnets 23b, 23b that are paired in the radial direction, the inner peripheral second circumferential sub-permanent magnet 23b is an inner circumferential axial protrusion that is adjacent in the circumferential direction. The second circumferential sub-permanent magnet 23b on the outer circumferential side is sandwiched from both sides in the circumferential direction by adjacent circumferential outer circumferential axial ridges 33b, 33b.

周方向に所定間隔をおいた位置で径方向に沿って伸びる各径方向副永久磁石２２ａ，２３ａは、厚さ方向（つまり、回転軸Ｏ方向および径方向に直交する方向）に磁化されている。そして、周方向で隣り合う２つの第１径方向副永久磁石２２ａ，２２ａは、例えば互いに磁化方向が異方向となるように設定されている。同様にして、周方向で隣り合う２つの第２径方向副永久磁石２３ａ，２３ａは、例えば互いに磁化方向が異方向となるように設定されている。
すなわち、周方向の一方側がＮ極とされた第１径方向副永久磁石２２ａには、周方向の一方側がＳ極とされた第１径方向副永久磁石２２ａが隣り合うようになっている。同様にして、周方向の一方側がＮ極とされた第２径方向副永久磁石２３ａには、周方向の一方側がＳ極とされた第２径方向副永久磁石２３ａが隣り合うようになっている。 Each of the radial secondary permanent magnets 22a and 23a extending along the radial direction at a predetermined interval in the circumferential direction is magnetized in the thickness direction (that is, the direction perpendicular to the rotational axis O direction and the radial direction). . And the two 1st radial direction secondary permanent magnets 22a and 22a adjacent in the circumferential direction are set, for example so that a magnetization direction may mutually become a different direction. Similarly, the two second radial sub-permanent magnets 23a, 23a adjacent in the circumferential direction are set so that, for example, the magnetization directions are different from each other.
That is, the first radial sub-permanent magnet 22a whose one side in the circumferential direction is the north pole is adjacent to the first radial sub-permanent magnet 22a whose one side in the circumferential direction is the south pole. Similarly, the second radial sub-permanent magnet 23a whose one side in the circumferential direction is N-pole is adjacent to the second radial sub-permanent magnet 23a whose one side in the circumferential direction is S-pole. Yes.

さらに、回転軸Ｏ方向で対向する第１径方向副永久磁石２２ａと第２径方向副永久磁石２３ａとは、互いに磁化方向が異方向となるように設定されている。
すなわち、周方向の一方側がＮ極とされた第１径方向副永久磁石２２ａには、周方向の一方側がＳ極とされた第２径方向副永久磁石２３ａが回転軸Ｏ方向で対向配置されている。 Further, the first radial sub-permanent magnet 22a and the second radial sub-permanent magnet 23a facing each other in the direction of the rotation axis O are set so that their magnetization directions are different from each other.
In other words, the first radial sub-permanent magnet 22a whose one side in the circumferential direction is the north pole is opposed to the second radial sub-permanent magnet 23a whose one side in the circumferential direction is the south pole in the direction of the rotation axis O. ing.

そして、互いに磁化方向が異方向となる状態で回転軸Ｏ方向で対向配置される複数対の第１径方向副永久磁石２２ａおよび第２径方向副永久磁石２３ａ，…，２２ａおよび２３ａのうち、周方向で隣り合う２対の第１径方向副永久磁石２２ａおよび第２径方向副永久磁石２３ａ，２２ａおよび２３ａは、主永久磁石２１ａを周方向の両側から挟み込むようにして配置されている。
そして、例えば回転軸Ｏ方向の一方側がＮ極かつ他方側がＳ極とされた主永久磁石２１ａに対して、この主永久磁石２１ａを回転軸Ｏ方向の一方側において周方向の両側から挟み込む２つの第１径方向副永久磁石２２ａ，２２ａは、互いのＮ極が周方向で対向するように配置され、この主永久磁石２１ａを回転軸Ｏ方向の他方側において周方向の両側から挟み込む２つの第２径方向副永久磁石２３ａ，２３ａは、互いのＳ極が周方向で対向するように配置されている。
これにより、所謂永久磁石のハルバッハ配置による磁束レンズ効果により主永久磁石２１ａおよび各径方向副永久磁石２２ａ，２３ａの磁束が収束し、各ステータ１２，１３に鎖交する有効磁束が相対的に増大する強め界磁状態とされている。 And among the multiple pairs of first radial sub-permanent magnets 22a and second radial sub-permanent magnets 23a, ..., 22a and 23a that are opposed to each other in the direction of the rotation axis O in a state where the magnetization directions are different from each other, Two pairs of first radial sub-permanent magnets 22a and second radial sub-permanent magnets 23a, 22a and 23a adjacent in the circumferential direction are arranged so as to sandwich the main permanent magnet 21a from both sides in the circumferential direction.
Then, for example, with respect to the main permanent magnet 21a in which one side in the rotation axis O direction is an N pole and the other side is an S pole, the main permanent magnet 21a is sandwiched from both sides in the circumferential direction on one side in the rotation axis O direction. The first radial sub-permanent magnets 22a, 22a are arranged so that their N poles are opposed to each other in the circumferential direction, and the two second sandwiching the main permanent magnet 21a from both sides in the circumferential direction on the other side in the rotation axis O direction. The two radial sub-permanent magnets 23a, 23a are arranged such that their south poles face each other in the circumferential direction.
Thereby, the magnetic flux of the main permanent magnet 21a and each of the radial sub-permanent magnets 22a and 23a converges by the magnetic flux lens effect due to the so-called permanent magnet Halbach arrangement, and the effective magnetic flux linked to the stators 12 and 13 relatively increases. It is considered to be a strong field state.

周方向に所定間隔をおいた位置で周方向に沿って伸びる内周側および外周側の各周方向副永久磁石２２ｂ，２３ｂは、厚さ方向（つまり、径方向）に磁化されており、径方向で対向する内周側および外周側の２つの第１周方向副永久磁石２２ｂ，２２ｂは、例えば互いに磁化方向が異方向となるように設定されている。同様にして、径方向で対向する内周側および外周側の２つの第２周方向副永久磁石２３ｂ，２３ｂは、例えば互いに磁化方向が異方向となるように設定されている。
すなわち、径方向の一方側がＮ極とされた第１周方向副永久磁石２２ｂには、径方向の一方側がＳ極とされた第１周方向副永久磁石２２ｂが径方向で対向するようになっている。同様にして、径方向の一方側がＮ極とされた第２周方向副永久磁石２３ｂには、径方向の一方側がＳ極とされた第２周方向副永久磁石２３ｂが径方向で対向するようになっている。 Each of the inner circumferential side and outer circumferential side secondary permanent magnets 22b and 23b extending along the circumferential direction at a predetermined interval in the circumferential direction is magnetized in the thickness direction (that is, radial direction) The two first circumferential direction secondary permanent magnets 22b and 22b on the inner circumferential side and the outer circumferential side opposed in the direction are set so that their magnetization directions are different from each other, for example. Similarly, the two second circumferential sub-permanent magnets 23b and 23b on the inner circumferential side and the outer circumferential side opposed in the radial direction are set so that their magnetization directions are different from each other, for example.
That is, the first circumferential sub-permanent magnet 22b whose one side in the radial direction is N-pole is opposed to the first circumferential sub-permanent magnet 22b whose one side in the radial direction is S-pole in the radial direction. ing. Similarly, the second circumferential sub-permanent magnet 23b whose one side in the radial direction is N pole is opposed to the second circumferential sub-permanent magnet 23b whose one side in the radial direction is S pole in the radial direction. It has become.

また、周方向で隣り合う２つの第１周方向副永久磁石２２ｂ，２２ｂは、例えば互いに磁化方向が異方向となるように設定されている。同様にして、周方向で隣り合う２つの第２周方向副永久磁石２３ｂ，２３ｂは、例えば互いに磁化方向が異方向となるように設定されている。
すなわち、内周側および外周側のそれぞれにおいて、径方向の一方側がＮ極とされた第１周方向副永久磁石２２ｂには、径方向の一方側がＳ極とされた第１周方向副永久磁石２２ｂが隣り合うようになっている。同様にして、径方向の一方側がＮ極とされた第２周方向副永久磁石２３ｂには、径方向の一方側がＳ極とされた第２周方向副永久磁石２３ｂが隣り合うようになっている。 Further, the two first circumferential sub-permanent magnets 22b and 22b adjacent in the circumferential direction are set so that their magnetization directions are different from each other, for example. Similarly, two second circumferential sub-permanent magnets 23b, 23b adjacent in the circumferential direction are set so that, for example, the magnetization directions are different from each other.
That is, in each of the inner circumferential side and the outer circumferential side, the first circumferential sub-permanent magnet 22b whose one side in the radial direction is N pole is the first circumferential sub-permanent magnet whose one side in the radial direction is S pole. 22b are adjacent to each other. Similarly, the second circumferential sub-permanent magnet 23b whose one side in the radial direction is the south pole is adjacent to the second circumferential sub-permanent magnet 23b whose one side in the radial direction is the south pole. Yes.

さらに、回転軸Ｏ方向で対向する第１周方向副永久磁石２２ｂと第２周方向副永久磁石２３ｂとは、互いに磁化方向が異方向となるように設定されている。
すなわち、内周側および外周側のそれぞれにおいて、周方向の一方側がＮ極とされた第１周方向副永久磁石２２ｂには、周方向の一方側がＳ極とされた第２周方向副永久磁石２３ｂが回転軸Ｏ方向で対向配置されている。 Further, the first circumferential sub-permanent magnet 22b and the second circumferential sub-permanent magnet 23b facing each other in the direction of the rotation axis O are set so that their magnetization directions are different from each other.
That is, in each of the inner peripheral side and the outer peripheral side, the first circumferential sub-permanent magnet 22b whose one side in the circumferential direction has N poles is the second circumferential sub-permanent magnet whose one side in the circumferential direction has S poles. 23b is arranged facing the rotation axis O direction.

そして、互いに磁化方向が異方向となる状態で回転軸Ｏ方向で対向配置される外周側および内周側の各複数対の第１周方向副永久磁石２２ｂおよび第２周方向副永久磁石２３ｂ，…，２２ｂおよび２３ｂのうち、径方向で対向する外周側の１対の第１周方向副永久磁石２２ｂおよび第２周方向副永久磁石２３ｂと、内周側の１対の第１周方向副永久磁石２２ｂおよび第２周方向副永久磁石２３ｂとは、主永久磁石２１ａを径方向の両側から挟み込むようにして配置されている。   A plurality of pairs of first and second circumferential sub-permanent magnets 22b and second circumferential sub-permanent magnets 23b on the outer circumferential side and the inner circumferential side that are opposed to each other in the direction of the rotation axis O in a state where the magnetization directions are different from each other. .., 22b and 23b, a pair of first circumferential sub-permanent magnets 22b and second circumferential sub-permanent magnets 23b on the outer circumferential side opposed in the radial direction, and a pair of first circumferential sub-magnets on the inner circumferential side. The permanent magnet 22b and the second circumferential sub-permanent magnet 23b are arranged so as to sandwich the main permanent magnet 21a from both sides in the radial direction.

そして、例えば回転軸Ｏ方向の一方側がＮ極かつ他方側がＳ極とされた主永久磁石２１ａに対して、この主永久磁石２１ａを回転軸Ｏ方向の一方側において径方向の両側から挟み込む外周側および内周側の２つの第１周方向副永久磁石２２ｂ，２２ｂは、互いのＮ極が径方向で対向するように配置され、この主永久磁石２１ａを回転軸Ｏ方向の他方側において径方向の両側から挟み込む外周側および内周側の２つの第２周方向副永久磁石２３ｂ，２３ｂは、互いのＳ極が周方向で対向するように配置されている。
これにより、所謂永久磁石のハルバッハ配置による磁束レンズ効果により主永久磁石２１ａおよび各周方向副永久磁石２２ｂ，２３ｂの磁束が収束し、各ステータ１２，１３に鎖交する有効磁束が相対的に増大する強め界磁状態とされている。 For example, with respect to the main permanent magnet 21a in which one side in the rotation axis O direction is an N pole and the other side is an S pole, the outer peripheral side sandwiches the main permanent magnet 21a from both sides in the radial direction on one side in the rotation axis O direction. The two first circumferential sub-magnets 22b and 22b on the inner circumferential side are arranged so that their N poles are opposed to each other in the radial direction, and the main permanent magnet 21a is arranged in the radial direction on the other side of the rotation axis O direction. The second circumferential sub-permanent magnets 23b and 23b on the outer circumferential side and the inner circumferential side sandwiched from both sides are arranged so that their S poles face each other in the circumferential direction.
As a result, the magnetic flux of the main permanent magnet 21a and the circumferential sub-permanent magnets 22b and 23b converges due to the so-called permanent magnet Halbach arrangement, and the effective magnetic flux linked to the stators 12 and 13 relatively increases. It is considered to be a strong field state.

なお、主永久磁石２１ａは、各径方向副永久磁石２２ａ，２３ａおよび各周方向副永久磁石２２ｂ，２３ｂの少なくとも一方に対して相対的に高い残留磁束密度を有するように設定されている。
また、各径方向副永久磁石２２ａ，２３ａおよび各周方向副永久磁石２２ｂ，２３ｂの少なくとも一方は、主永久磁石２１ａに対して相対的に高い保磁力を有するように設定されている。
例えば、各永久磁石２１ａ，２２ａ，２２ｂ、２３ａ，２３ｂにおいて、残留磁束密度が増大することに伴い、保磁力が減少傾向に変化するように設定されており、主永久磁石２１ａは、残留磁束密度がほぼ１．４８Ｔ、保磁力がぼぼ９９５ｋＡ・ｍ−１とされ、各径方向副永久磁石２２ａ，２３ａおよび各周方向副永久磁石２２ｂ，２３ｂは、残留磁束密度がほぼ１．３Ｔ、保磁力がほぼ２５５０ｋＡ・ｍ−１とされている。 The main permanent magnet 21a is set to have a relatively high residual magnetic flux density with respect to at least one of the radial sub-permanent magnets 22a and 23a and the circumferential sub-permanent magnets 22b and 23b.
Moreover, at least one of each radial direction secondary permanent magnet 22a, 23a and each circumferential direction secondary permanent magnet 22b, 23b is set to have a relatively high coercive force with respect to the main permanent magnet 21a.
For example, in each of the permanent magnets 21a, 22a, 22b, 23a, and 23b, the coercive force is set to change in a decreasing tendency as the residual magnetic flux density increases. Is approximately 1.48 T, the coercive force is approximately 995 kA · m −1 , and each of the radial secondary permanent magnets 22 a and 23 a and the circumferential secondary permanent magnets 22 b and 23 b has a residual magnetic flux density of approximately 1.3 T and a coercive force. Is approximately 2550 kA · m −1 .

また、各第１ステータ１２および第２ステータ１３は、略円環板状のヨーク部４１と、ロータ１１に対向するヨーク部４１の対向面上で周方向に所定間隔をおいた位置から回転軸Ｏ方向に沿ってロータ１１に向かい突出すると共に径方向に伸びる複数のティース４２，…，４２と、適宜のティース４２，４２間に装着される固定子巻線（図示略）とを備えて構成されている。   Further, each of the first stator 12 and the second stator 13 has a rotating shaft from a position at a predetermined interval in the circumferential direction on the facing surface of the substantially annular plate-shaped yoke portion 41 and the yoke portion 41 facing the rotor 11. A plurality of teeth 42,..., 42 projecting toward the rotor 11 along the O direction and extending in the radial direction, and a stator winding (not shown) mounted between the appropriate teeth 42, 42. Has been.

上述したように、本実施の形態によるモータ１０によれば、所謂永久磁石のハルバッハ配置による磁束レンズ効果により、主永久磁石２１ａと、各径方向副永久磁石２２ａ，２３ａおよび各周方向副永久磁石２２ｂ，２３ｂとの各磁束を効率よく収束させることができ、各ステータ１２，１３の固定子巻線に鎖交する磁束量を増大させることができる。
しかも、相対的に各ステータ１２，１３からの磁界が反磁界となり難い主永久磁石２１ａに対しては、各副永久磁石２２ａ，２３ａ，２２ｂ，２３ｂに比べて、残留磁束密度が相対的に高くなるように設定し、相対的に各ステータ１２，１３からの磁界が反磁界となり易い各副永久磁石２２ａ，２３ａ，２２ｂ，２３ｂに対しては、主永久磁石２１ａに比べて、保磁力が相対的に高くなるように設定することによって、各副永久磁石２２ａ，２３ａ，２２ｂ，２３ｂが、各ステータ１２，１３からの磁界によって減磁されてしまうことを抑制しつつ、各ステータ１２，１３の固定子巻線に鎖交する磁束量をより一層、増大させることができる。 As described above, according to the motor 10 according to the present embodiment, the main permanent magnet 21a, the radial sub-permanent magnets 22a and 23a, and the circumferential sub-permanent magnets are obtained by the magnetic flux lens effect by the so-called permanent magnet Halbach arrangement. Each magnetic flux with 22b and 23b can be converged efficiently, and the amount of magnetic flux linked to the stator winding of each stator 12 and 13 can be increased.
In addition, the residual magnetic flux density is relatively high for the main permanent magnet 21a, in which the magnetic fields from the stators 12 and 13 are relatively difficult to become a demagnetizing field, as compared with the sub permanent magnets 22a, 23a, 22b, and 23b. The sub-permanent magnets 22a, 23a, 22b, and 23b, in which the magnetic fields from the stators 12 and 13 are relatively likely to be demagnetizing fields, have a relative coercive force relative to the main permanent magnet 21a. By setting so that each sub-permanent magnet 22a, 23a, 22b, 23b is demagnetized by the magnetic field from each stator 12, 13, it is possible to prevent each stator 12, 13 from being demagnetized. The amount of magnetic flux interlinking with the stator winding can be further increased.

なお、上述した実施の形態においては、主永久磁石装着層２１を回転軸Ｏ方向の両側から挟みこむ第１副永久磁石装着層２２および第２副永久磁石装着層２３を備えるとしたが、これに限定されず、第１副永久磁石装着層２２または第２副永久磁石装着層２３の何れか一方のみを備え、何れか他方を省略してもよい。
また、上述した実施の形態においては、第１ステータ１２または第２ステータ１３の何れか一方のみを備え、何れか他方を省略してもよい。 In the above-described embodiment, the first secondary permanent magnet mounting layer 22 and the second secondary permanent magnet mounting layer 23 sandwiching the main permanent magnet mounting layer 21 from both sides in the rotation axis O direction are provided. However, the present invention is not limited thereto, and only one of the first sub permanent magnet mounting layer 22 and the second sub permanent magnet mounting layer 23 may be provided, and either one may be omitted.
In the above-described embodiment, only one of the first stator 12 and the second stator 13 may be provided, and either one may be omitted.

例えば図４に示すように、上述した実施の形態の変形例によるモータ１０は、回転軸Ｏ周りに回転可能に設けられた略円板状のロータ１１と、ロータ１１を回転させる回転磁界を発生する複数相の各固定子巻線を有する第１ステータ１２とを備えるアキシャルギャップ型のモータである。   For example, as shown in FIG. 4, the motor 10 according to the modification of the embodiment described above generates a substantially disk-shaped rotor 11 that is rotatably provided around the rotation axis O and a rotating magnetic field that rotates the rotor 11. It is an axial gap type motor provided with the 1st stator 12 which has each stator winding of multiple phases.

この変形例に係るロータ１１は、例えば複数の主永久磁石２１ａ，…，２１ａが装着された主永久磁石装着層２１と、複数の第１径方向副永久磁石２２ａ，…，２２ａおよび第１周方向副永久磁石２２ｂ，…，２２ｂおよび第１ヨーク２２ｃ，…，２２ｃを具備する第１副永久磁石装着層２２とを備えて構成されている。
そして、回転軸Ｏ方向に沿って一方側から他方側に向かって同軸に、順次、第１副永久磁石装着層２２と、主永久磁石装着層２１とが積層されるようにして、非磁性材からなるロータフレーム２５内に収容されている。 The rotor 11 according to this modification includes, for example, a main permanent magnet mounting layer 21 on which a plurality of main permanent magnets 21a,..., 21a are mounted, a plurality of first radial sub-permanent magnets 22a,. , 22b and first sub permanent magnet mounting layer 22 having first yokes 22c,..., 22c.
Then, the first sub permanent magnet mounting layer 22 and the main permanent magnet mounting layer 21 are sequentially laminated coaxially from one side to the other side along the direction of the rotation axis O, so that the non-magnetic material It is accommodated in the rotor frame 25 which consists of.

つまり、この変形例に係るモータ１０において、上述した実施の形態によるモータ１０と異なる点は、第２ステータ１３および第２副永久磁石装着層２３が省略されている点である。   That is, the motor 10 according to this modification is different from the motor 10 according to the above-described embodiment in that the second stator 13 and the second sub permanent magnet mounting layer 23 are omitted.

この変形例に係るロータフレーム２５は、例えば周方向に所定間隔をおいて配置された複数の径方向リブ３１，…，３１によって接続された内周側筒状部３２と外周側筒状部３３と、内周側筒状部３２の内周面上から内方に向かい突出する円環板状に形成され、外部の駆動軸に接続される接続部３４とを備えて構成されている。   The rotor frame 25 according to this modification includes, for example, an inner peripheral tubular portion 32 and an outer peripheral tubular portion 33 connected by a plurality of radial ribs 31,. And a connecting portion 34 that is formed in an annular plate shape that protrudes inward from the inner peripheral surface of the inner peripheral cylindrical portion 32 and is connected to an external drive shaft.

そして、内周側筒状部３２の外周面上には、回転軸Ｏ方向の他方側にずれた位置で径方向外方に向かい突出すると共に周方向に沿って伸びる内周側周方向突条３２ａと、周方向に所定間隔をおいた位置で径方向外方に向かい突出すると共に回転軸Ｏ方向に沿って伸びる複数の内周側軸方向突条３２ｂ，…，３２ｂとが設けられている。   And on the outer peripheral surface of the inner peripheral side cylindrical portion 32, an inner peripheral side circumferential ridge projecting outward in the radial direction at a position shifted to the other side in the direction of the rotation axis O and extending along the circumferential direction. 32a and a plurality of inner peripheral side axial ridges 32b, ..., 32b that protrude radially outward at predetermined intervals in the circumferential direction and extend along the direction of the rotation axis O are provided. .

また、外周側筒状部３３の内周面上には、内周側周方向突条３２ａに対向するようにして回転軸Ｏ方向の他方側にずれた位置で径方向内方に向かい突出すると共に周方向に沿って伸びる外周側周方向突条３３ａと、各内周側軸方向突条３２ｂ，…，３２ｂに対向するようにして周方向に所定間隔をおいた位置で径方向内方に向かい突出すると共に回転軸Ｏ方向に沿って伸びる複数の外周側軸方向突条３３ｂ，…，３３ｂとが設けられている。   Further, on the inner peripheral surface of the outer peripheral side tubular portion 33, it protrudes radially inward at a position shifted to the other side in the direction of the rotation axis O so as to face the inner peripheral side circumferential protrusion 32 a. In addition, the outer circumferential side circumferential ridge 33a extending along the circumferential direction and the inner circumferential side axial ridges 32b, ..., 32b are radially inward at a predetermined interval in the circumferential direction so as to face each other. A plurality of outer circumferential axial ridges 33b,..., 33b are provided that protrude in the opposite direction and extend along the direction of the rotation axis O.

そして、各突条３２ａ，３２ｂの径方向での突出高さおよび各突条３３ａ，３３ｂの径方向での突出高さは各同等とされている。
そして、径方向リブ３１は、各突条３２ａ，３２ｂの交差部と、各突条３３ａ，３３ｂの交差部とを接続するようにして配置されている。 And the protrusion height in the radial direction of each protrusion 32a, 32b and the protrusion height in the radial direction of each protrusion 33a, 33b are made equal.
And the radial direction rib 31 is arrange | positioned so that the intersection part of each protrusion 32a, 32b and the intersection part of each protrusion 33a, 33b may be connected.

本発明の一実施形態に係るモータの斜視図である。It is a perspective view of a motor concerning one embodiment of the present invention. 本発明の一実施形態に係るモータのロータの分解斜視図である。It is a disassembled perspective view of the rotor of the motor which concerns on one Embodiment of this invention. 本発明の一実施形態に係るモータのロータの各永久磁石の配置状態を示す図である。It is a figure which shows the arrangement | positioning state of each permanent magnet of the rotor of the motor which concerns on one Embodiment of this invention. 本発明の一実施形態の変形例に係るモータの分解斜視図である。It is a disassembled perspective view of the motor which concerns on the modification of one Embodiment of this invention. 本発明の一実施形態の変形例に係るモータのロータの各永久磁石の配置状態を示す図である。It is a figure which shows the arrangement | positioning state of each permanent magnet of the rotor of the motor which concerns on the modification of one Embodiment of this invention.

符号の説明Explanation of symbols

１０ モータ
１１ ロータ
１２ 第１ステータ
１３ 第２ステータ
２１ａ 主永久磁石
２２ａ 第１径方向副永久磁石（第１副永久磁石）
２２ｂ 第１周方向副永久磁石（第２副永久磁石）
２３ａ 第２径方向副永久磁石（第１副永久磁石）
２３ｂ 第２周方向副永久磁石（第２副永久磁石） DESCRIPTION OF SYMBOLS 10 Motor 11 Rotor 12 1st stator 13 2nd stator 21a Main permanent magnet 22a 1st radial direction secondary permanent magnet (1st secondary permanent magnet)
22b First circumferential sub-permanent magnet (second sub-permanent magnet)
23a Second radial direction secondary permanent magnet (first secondary permanent magnet)
23b Second circumferential secondary permanent magnet (second secondary permanent magnet)

Claims (5)

回転軸周りに回転可能とされたロータと、回転軸方向の少なくとも一方側から前記ロータに対向配置されたステータを備えるアキシャルギャップ型のモータであって、
前記ロータは、磁化方向が前記回転軸方向と平行になるようにして周方向に沿って配置された複数の主永久磁石と、
磁化方向が前記回転軸方向および径方向に直交する方向と平行になるようにして前記主永久磁石の端部近傍に配置された第１副永久磁石と、
磁化方向が前記径方向と平行になるようにして前記主永久磁石の端部近傍に配置された第２副永久磁石とを備えることを特徴とするモータ。 An axial gap type motor comprising a rotor that is rotatable around a rotation axis, and a stator that is disposed to face the rotor from at least one side in the rotation axis direction,
The rotor includes a plurality of main permanent magnets arranged along a circumferential direction so that a magnetization direction is parallel to the rotation axis direction;
A first sub permanent magnet disposed in the vicinity of the end of the main permanent magnet so that the magnetization direction is parallel to the direction perpendicular to the rotation axis direction and the radial direction;
A motor comprising: a second secondary permanent magnet disposed in the vicinity of an end of the main permanent magnet so that a magnetization direction is parallel to the radial direction. 各前記主永久磁石毎に前記第１副永久磁石が前記主永久磁石の前記周方向の端部近傍に配置され、
各前記主永久磁石毎に前記第２副永久磁石が前記主永久磁石の前記径方向の端部近傍に配置されていることを特徴とする請求項１に記載のモータ。 For each of the main permanent magnets, the first sub permanent magnet is disposed in the vicinity of the circumferential end of the main permanent magnet,
2. The motor according to claim 1, wherein the second sub permanent magnet is disposed in the vicinity of the radial end of the main permanent magnet for each of the main permanent magnets. 前記ステータは、回転軸方向の両側から前記ロータを挟み込むようにして対向配置された第１ステータおよび第２ステータを備えることを特徴とする請求項１または請求項２に記載のモータ。 3. The motor according to claim 1, wherein the stator includes a first stator and a second stator arranged to face each other so as to sandwich the rotor from both sides in the rotation axis direction. 前記主永久磁石は、前記第１副永久磁石および前記第２副永久磁石の少なくとも一方に対して相対的に高い残留磁束密度を有することを特徴とする請求項１から請求項３の何れかひとつに記載のモータ。 The main permanent magnet has a relatively high residual magnetic flux density with respect to at least one of the first sub permanent magnet and the second sub permanent magnet. The motor described in. 前記第１副永久磁石および前記第２副永久磁石の少なくとも一方は、前記主永久磁石に対して相対的に高い保磁力を有すること特徴とする請求項１から請求項４の何れか１つに記載のモータ。 The at least one of the first sub permanent magnet and the second sub permanent magnet has a relatively high coercive force with respect to the main permanent magnet, according to any one of claims 1 to 4. The motor described.
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