JP5772330B2 - Permanent magnet motor and method for manufacturing rotor part of permanent magnet motor - Google Patents

Permanent magnet motor and method for manufacturing rotor part of permanent magnet motor Download PDF

Info

Publication number
JP5772330B2
JP5772330B2 JP2011158127A JP2011158127A JP5772330B2 JP 5772330 B2 JP5772330 B2 JP 5772330B2 JP 2011158127 A JP2011158127 A JP 2011158127A JP 2011158127 A JP2011158127 A JP 2011158127A JP 5772330 B2 JP5772330 B2 JP 5772330B2
Authority
JP
Japan
Prior art keywords
rotor
permanent magnet
concave groove
axial direction
rotor core
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2011158127A
Other languages
Japanese (ja)
Other versions
JP2013027106A (en
Inventor
米盛　敬
敬 米盛
直樹 板坂
直樹 板坂
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mazda Motor Corp
Original Assignee
Mazda Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mazda Motor Corp filed Critical Mazda Motor Corp
Priority to JP2011158127A priority Critical patent/JP5772330B2/en
Publication of JP2013027106A publication Critical patent/JP2013027106A/en
Application granted granted Critical
Publication of JP5772330B2 publication Critical patent/JP5772330B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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

Landscapes

  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Description

本発明は、永久磁石が設けられたロータコアを有するロータと、該ロータのロータコアの外周側に配設される、巻線を有するステータとを備えた永久磁石式モータ及び該永久磁石式モータのロータ部の製造方法に関する技術分野に属する。 The present invention relates to a permanent magnet motor including a rotor having a rotor core provided with permanent magnets, and a stator having windings arranged on the outer peripheral side of the rotor core of the rotor, and the rotor of the permanent magnet motor. Belongs to the technical field related to the manufacturing method of parts .

従来より、ロータコアに永久磁石が埋め込まれた永久磁石式モータ（ＩＰＭモータ）はよく知られている。このようなモータでは、永久磁石の端部とロータコアの外周面との間において永久磁石からの漏れ磁束が発生して、モータ効率を低下させるという問題がある。   Conventionally, a permanent magnet type motor (IPM motor) in which a permanent magnet is embedded in a rotor core is well known. In such a motor, there is a problem that leakage magnetic flux from the permanent magnet is generated between the end portion of the permanent magnet and the outer peripheral surface of the rotor core, thereby reducing the motor efficiency.

そこで、このような漏れ磁束が発生しないようにするために、例えば特許文献１では、ロータコアの外周面に、ロータ軸心方向に延びる複数の凹溝部を、周方向に間隔をあけて形成し、該各凹溝部内に永久磁石をそれぞれ配設し、この各凹溝部内の永久磁石を、該凹溝部の壁面部と押え部材（特許文献１では、抑え材）とによって挟持し、ロータコアのロータ軸心方向の両側にそれぞれ配設される２つのエンドプレートによって、永久磁石及び押え部材を固定するようにすることが提案されている。   Therefore, in order to prevent such leakage magnetic flux from occurring, for example, in Patent Document 1, a plurality of concave grooves extending in the axial direction of the rotor are formed on the outer circumferential surface of the rotor core at intervals in the circumferential direction. A permanent magnet is disposed in each concave groove portion, and the permanent magnet in each concave groove portion is sandwiched between a wall surface portion of the concave groove portion and a pressing member (a suppressing member in Patent Document 1), and the rotor of the rotor core It has been proposed to fix the permanent magnet and the pressing member by two end plates respectively disposed on both sides in the axial direction.

特開２０１１−４５１９号公報JP 2011-4519 A

しかしながら、上記特許文献１のものでは、押え部材に、ロータ軸心方向に貫通する貫通孔を設け、この貫通孔に棒材を挿通して、この棒材を介して、押え部材をエンドプレートに固定するものであるため、押え部材の固定に関してエンドプレートが必要であり、このため、そのエンドプレートの厚みの分だけ、永久磁石式モータのロータ軸心方向の長さが長くなるとともに、コストアップを招いてしまう。特に、複数のロータコアをロータ軸心方向に積層して、複数のロータコアにおける各凹溝部の周方向の位置を、複数のロータコア間で互いに周方向にずらすことで、永久磁石式モータのコギングトルクや出力トルク変動（トルクリプル）を小さくしようとする場合には、永久磁石式モータのロータ軸心方向の長さ及びコストの点でより一層不利になる。   However, in the thing of the said patent document 1, the through-hole penetrated to a rotor axial direction is provided in the holding member, A bar is inserted in this through-hole, and this presser is used as an end plate through this bar. Because it is fixed, an end plate is required for fixing the presser member. For this reason, the length of the permanent magnet motor in the axial direction of the rotor increases and the cost increases by the thickness of the end plate. Will be invited. In particular, by laminating a plurality of rotor cores in the axial direction of the rotor and shifting the circumferential position of each groove in the plurality of rotor cores in the circumferential direction between the plurality of rotor cores, the cogging torque of the permanent magnet motor When trying to reduce the output torque fluctuation (torque ripple), the length of the permanent magnet motor in the axial direction of the rotor and the cost are further disadvantageous.

本発明は、斯かる点に鑑みてなされたものであり、その目的とするところは、永久磁石式モータのロータ軸心方向の長さが長くならないようにしつつ、低コストで、永久磁石からの漏れ磁束の発生を防止しようとすることにある。   The present invention has been made in view of such a point, and the object of the present invention is to reduce the cost of the permanent magnet motor from the permanent magnet at a low cost while preventing the length of the permanent magnet motor from extending in the axial direction of the rotor. The purpose is to prevent the occurrence of leakage magnetic flux.

上記の目的を達成するために、本発明では、永久磁石が設けられたロータコアを有するロータと、該ロータのロータコアの外周側に配設された、巻線を有するステータとを備えた永久磁石式モータを対象として、上記ロータコアの外周面には、ロータ軸心方向に延びる複数の凹溝部が、周方向に間隔をあけて形成されており、上記各凹溝部内には、上記永久磁石と、上記凹溝部内の上記永久磁石を、該凹溝部の壁面部と共に挟持する押え部材と、上記凹溝部の壁面部に固定された規制部材と、が配設されており、上記規制部材は、該規制部材が配設された凹溝部内の押え部材のロータ径方向外側より該押え部材を支持するとともに、上記凹溝部の壁面部と協働して、該押え部材の移動を規制するように構成され、上記各凹溝部内の永久磁石は、上記押え部材と該凹溝部の壁面部との間で、互いに間隔をあけた状態で複数配設され、上記各凹溝部内の規制部材は、枠状部と、該枠状部からロータ軸心方向一側に延びかつ上記押え部材を挟むように支持する複数の支持部とを有し、上記各凹溝部内の上記複数の永久磁石は、上記規制部材の互いに異なる支持部間に固定されている、という構成とした。 In order to achieve the above object, in the present invention, a permanent magnet type comprising a rotor having a rotor core provided with a permanent magnet and a stator having a winding disposed on the outer peripheral side of the rotor core of the rotor. For the motor, a plurality of concave grooves extending in the rotor axial direction are formed on the outer circumferential surface of the rotor core at intervals in the circumferential direction.In each concave groove, the permanent magnet and A pressing member that clamps the permanent magnet in the concave groove portion together with the wall surface portion of the concave groove portion, and a restriction member fixed to the wall surface portion of the concave groove portion, are provided, and the restriction member is The retainer is supported from the outside in the rotor radial direction of the retainer in the recessed groove where the restricting member is disposed, and is configured to restrict the movement of the retainer in cooperation with the wall surface of the recessed groove. is, the permanent magnets in the respective groove portions A plurality of the pressing members and the wall surface of the concave groove portion are disposed in a state of being spaced apart from each other, and the regulating member in each of the concave groove portions includes a frame-shaped portion and a rotor axis from the frame-shaped portion. A plurality of support portions extending in one direction and supporting the pressing member so as to sandwich the pressing member, and the plurality of permanent magnets in the concave groove portions are fixed between different support portions of the restriction member. It was configured to be.

上記の構成により、ロータコアとは別体の押え部材により、凹溝部の壁面部と共に永久磁石を挟持したので、永久磁石からの漏れ磁束の発生を防止することができる。また、各凹溝部内には、押え部材の移動を規制するように構成された規制部材が配設されているので、規制部材を介して押え部材を移動しないように凹溝部の壁面部に固定することができる。さらに、規制部材は、押え部材のロータ径方向外側より該押え部材を支持するので、押え部材がロータの回転により特にロータ径方向外側へ移動しようとしても、その移動を確実に規制することができる。この結果、ロータコアのロータ軸心方向の両側に、押え部材を固定するための部材を配設する必要はない。したがって、永久磁石式モータのロータ軸心方向の長さが長くならず、また、低コストで済む。   With the above configuration, since the permanent magnet is sandwiched together with the wall surface portion of the recessed groove portion by the pressing member separate from the rotor core, generation of leakage magnetic flux from the permanent magnet can be prevented. In addition, since a regulating member configured to regulate the movement of the presser member is disposed in each concave groove portion, it is fixed to the wall surface portion of the concave groove portion so as not to move the presser member via the regulating member. can do. Further, the restricting member supports the presser member from the outer side in the rotor radial direction of the presser member. Therefore, even when the presser member tries to move particularly outward in the rotor radial direction by the rotation of the rotor, the movement can be reliably restricted. . As a result, it is not necessary to arrange members for fixing the pressing member on both sides of the rotor core in the rotor axial direction. Therefore, the length of the permanent magnet motor in the axial direction of the rotor is not increased, and the cost can be reduced.

上記永久磁石式モータにおいて、上記ロータは、上記各凹溝部内に上記永久磁石、上記押え部材及び上記規制部材が配設された上記ロータコアを複数有し、上記複数のロータコアは、ロータ軸心方向に積層され、上記複数のロータコアにおける各凹溝部の周方向の位置が、該複数のロータコア間で互いに周方向にずれており、相隣接する任意の２つのロータコアのうちロータ軸心方向一側のロータコアの各凹溝部の周方向の位置が、ロータ軸心方向他側のロータコアの各凹溝部に対して周方向一側に所定角度だけずれている、ことが好ましい。   In the permanent magnet motor, the rotor includes a plurality of the rotor cores in which the permanent magnets, the pressing member, and the regulating member are disposed in the concave grooves, and the plurality of rotor cores are arranged in a rotor axial direction. The circumferential positions of the concave grooves in the plurality of rotor cores are shifted in the circumferential direction between the plurality of rotor cores, and one of the two adjacent rotor cores adjacent to one another in the rotor axial direction. It is preferable that the circumferential position of each concave groove portion of the rotor core is shifted by a predetermined angle to one circumferential direction side with respect to each concave groove portion of the rotor core on the other side in the rotor axial direction.

このことにより、永久磁石式モータのコギングトルクや出力トルク変動（トルクリプル）を小さくすることができる。一方、このように複数のロータコアをロータ軸心方向に積層する場合、各ロータコアのロータ軸心方向の両側に、押え部材を固定するための部材を配設したとすると、永久磁石式モータのロータ軸心方向の長さ及びコストの点でより一層不利になる。また、相隣接するロータコア間に、押え部材を固定するための部材が介在することで、モータ効率が低下してしまう。しかし、本発明では、各ロータコアのロータ軸心方向の両側に、押え部材を固定するための部材を配設する必要はないので、永久磁石式モータのロータ軸心方向の長さを出来る限り長くならないようにすることができるとともに、コストアップを出来る限り抑制することができる。また、押え部材を固定するための上記部材を設けることによるモータ効率の低下を抑制することができる。   As a result, the cogging torque and output torque fluctuation (torque ripple) of the permanent magnet motor can be reduced. On the other hand, when laminating a plurality of rotor cores in the rotor axial direction as described above, assuming that members for fixing the pressing member are disposed on both sides of each rotor core in the rotor axial direction, the rotor of the permanent magnet motor This is further disadvantageous in terms of axial length and cost. Moreover, motor efficiency will fall because the member for fixing a pressing member interposes between adjacent rotor cores. However, in the present invention, it is not necessary to provide a member for fixing the pressing member on both sides of each rotor core in the axial direction of the rotor, so that the length of the permanent magnet motor in the axial direction of the rotor is made as long as possible. It is possible to prevent this from occurring, and it is possible to suppress the cost increase as much as possible. Moreover, the fall of the motor efficiency by providing the said member for fixing a pressing member can be suppressed.

上記永久磁石式モータにおいて、上記押え部材と上記各凹溝部の壁面部との間における上記複数の永久磁石間の、上記支持部が占める空間以外の空間に、樹脂が充填されている、ことが好ましい。 In the permanent magnet type motor, among the plurality of permanent magnets in between the wall portions of the upper Kiosae member and the respective groove portions, the space other than the space occupied by the support unit, the resin is filled, it Is preferred.

こうすることで、充填する樹脂により、凹溝部内に存在する隙間をなくすようにすることができ、これにより、永久磁石、押え部材及び規制部材間のがたつきを防止することができるとともに、押え部材の移動をより確実に規制することができる。   By doing so, the resin to be filled can eliminate the gap existing in the concave groove portion, thereby preventing rattling between the permanent magnet, the pressing member and the regulating member, The movement of the pressing member can be more reliably regulated.

上記永久磁石式モータにおいて、上記各凹溝部内に上記永久磁石、上記押え部材及び上記規制部材が配設された上記ロータコアの外周面に、該外周面全周を覆うカバー部材が設けられている、ことが好ましい。   In the permanent magnet motor, a cover member is provided on the outer peripheral surface of the rotor core, in which the permanent magnet, the pressing member, and the regulating member are disposed in each concave groove, and covers the entire outer periphery. Is preferable.

このことにより、押え部材がロータの回転により特にロータ径方向外側へ移動しようとしても、カバー部材によって、その移動をより確実に規制することができる。また、カバー部材を、厚みの薄い非磁性体でかつ導体で構成することで、表皮効果を利用して、特にインバータのスイッチング作用に伴って生じる高周波電流をカバー部材に流すことができ、ロータコアの発熱を抑制することができる。   As a result, even if the pressing member attempts to move particularly outward in the radial direction of the rotor due to the rotation of the rotor, the movement can be more reliably restricted by the cover member. In addition, by configuring the cover member with a thin non-magnetic material and a conductor, it is possible to flow a high-frequency current generated in association with the switching action of the inverter to the cover member using the skin effect, Heat generation can be suppressed.

本発明の別の態様として、請求項１記載の永久磁石式モータにおいて、上記ロータコアの各凹溝部内に、上記複数の永久磁石、上記押え部材及び上記規制部材が設けられてなるロータ部を製造する、永久磁石式モータのロータ部の製造方法の発明が提供され、この発明では、上記ロータコア、上記永久磁石、上記押え部材及び上記規制部材をそれぞれ製造する製造工程と、上記製造工程の後、上記規制部材の上記複数の支持部間に、上記押え部材を、該規制部材の枠状部の反対側から挿入するとともに、上記複数の永久磁石を、該規制部材の互いに異なる支持部間に挿入する押え部材・永久磁石挿入工程と、上記押え部材・永久磁石挿入工程の後、上記規制部材を、上記押え部材及び上記複数の永久磁石を支持した状態で、上記ロータコアの各凹溝部に対してロータ軸心方向一側から挿入する規制部材挿入工程と、を備えるものとする。According to another aspect of the present invention, in the permanent magnet motor according to claim 1, a rotor portion in which the plurality of permanent magnets, the pressing member, and the regulating member are provided in each concave groove portion of the rotor core is manufactured. An invention of a manufacturing method of a rotor part of a permanent magnet motor is provided, and in this invention, after the manufacturing process of manufacturing the rotor core, the permanent magnet, the pressing member and the regulating member, respectively, The holding member is inserted between the plurality of support portions of the restriction member from the side opposite to the frame-shaped portion of the restriction member, and the plurality of permanent magnets are inserted between different support portions of the restriction member. After the presser member / permanent magnet insertion step and the presser member / permanent magnet insertion step, the restricting member is supported on the rotor core while supporting the presser member and the plurality of permanent magnets. Shall and a regulating member insertion step of inserting the rotor axial direction on one side relative to the groove portion.

上記永久磁石式モータのロータ部の製造方法において、上記規制部材挿入工程の後、上記押え部材と上記凹溝部の壁面部との間における上記複数の永久磁石間の、上記支持部が占める空間以外の空間に、樹脂を充填して該樹脂を硬化させる樹脂充填硬化工程を更に備える、ことが好ましい。In the method for manufacturing a rotor part of the permanent magnet motor, after the restricting member insertion step, other than the space occupied by the support part between the plurality of permanent magnets between the pressing member and the wall surface part of the concave groove part. It is preferable to further include a resin filling and curing step of filling the space with resin and curing the resin.

上記永久磁石式モータのロータ部の製造方法において、上記規制部材挿入工程を実行する前の２つの上記ロータコアを、順次モータ軸上に周方向に位置決めしながら、該２つのロータコアがロータ軸心方向に積層されかつ該２つのロータコアにおける凹溝部の周方向の位置が該２つのロータコア間で互いに周方向にずれるようにセットするロータコアセット工程を更に備え、上記ロータコアセット工程の後に、上記２つのロータコアのうち一方のロータコアにおける各凹溝部に対して、ロータ軸心方向の他方のロータコアとは反対側から上記規制部材を挿入することで上記規制部材挿入工程を実行するとともに、上記他方のロータコアにおける各凹溝部に対して、ロータ軸心方向の上記一方のロータコアとは反対側から上記規制部材を挿入することで上記規制部材挿入工程を実行するようにしてもよい。In the method for manufacturing a rotor portion of the permanent magnet motor, the two rotor cores are positioned in the circumferential direction of the rotor while the two rotor cores before performing the restricting member insertion step are sequentially positioned on the motor shaft in the circumferential direction. And a rotor core setting step in which the circumferential position of the concave groove portion in the two rotor cores is set so as to be displaced from each other in the circumferential direction between the two rotor cores, and after the rotor core setting step, the two rotor cores The restriction member insertion step is performed by inserting the restriction member from the opposite side to the other rotor core in the rotor axial direction with respect to each concave groove portion in one rotor core, and each of the other rotor cores The restriction member is inserted into the concave groove portion from the side opposite to the one rotor core in the rotor axial direction. It may be performed to the regulating member insertion step by.

以上説明したように、本発明の永久磁石式モータ及び該永久磁石式モータのロータ部の製造方法によると、ロータコアとは別体の押え部材により、凹溝部の壁面部と共に永久磁石を挟持することで、永久磁石からの漏れ磁束の発生を防止することができ、また、凹溝部内に配設された規制部材を介して、押え部材を移動しないように凹溝部の壁面部に固定することができるので、ロータコアのロータ軸心方向の両側に、押え部材を固定するための部材を配設する必要はなく、よって、永久磁石式モータのロータ軸心方向の長さが長くならないようにしつつ、低コストで、永久磁石からの漏れ磁束の発生を防止することができる。 As described above, according to the permanent magnet motor of the present invention and the method of manufacturing the rotor portion of the permanent magnet motor, the permanent magnet is clamped together with the wall surface portion of the concave groove portion by the holding member separate from the rotor core. Thus, the occurrence of leakage magnetic flux from the permanent magnet can be prevented, and the pressing member can be fixed to the wall surface portion of the concave groove portion so as not to move via the regulating member disposed in the concave groove portion. Since it is possible, it is not necessary to arrange members for fixing the pressing member on both sides of the rotor core in the rotor axial direction, so that the length of the permanent magnet motor in the rotor axial direction is not increased. Generation of leakage magnetic flux from the permanent magnet can be prevented at low cost.

本発明の実施形態１に係る永久磁石式モータの一部を示す斜視図である。It is a perspective view which shows a part of permanent magnet type motor which concerns on Embodiment 1 of this invention. 上記永久磁石式モータのロータのロータ部を示す斜視図である。It is a perspective view which shows the rotor part of the rotor of the said permanent magnet type motor. 上記ロータ部のロータコア、永久磁石、押え部材及び規制部材を示す分解斜視図である。It is a disassembled perspective view which shows the rotor core of the said rotor part, a permanent magnet, the pressing member, and a control member. 上記ロータコアの凹溝部を拡大して示す、ロータ軸心方向から見た図である。It is the figure seen from the rotor axial center direction which expands and shows the concave-groove part of the said rotor core. 上記凹溝部に、永久磁石、押え部材及び規制部材が配設された状態を示す図４相当図である。FIG. 5 is a view corresponding to FIG. 4 illustrating a state in which a permanent magnet, a pressing member, and a regulating member are disposed in the concave groove portion. 実施形態２を示す図２相当図である。FIG. 3 is a view corresponding to FIG. 実施形態３を示す図２相当図である。FIG. 9 is a view corresponding to FIG. 実施形態３を示す図３相当図である。FIG. 6 is a view corresponding to FIG. 実施形態４を示す図２相当図である。FIG. 9 is a view corresponding to FIG.

以下、本発明の実施形態を図面に基づいて詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

（実施形態１）
図１は、本発明の実施形態１に係る永久磁石式モータＭの一部を示す。この永久磁石式モータＭは、本実施形態では、電気自動車やハイブリッド自動車の車両駆動用モータとして使用されるものであって、希土類磁石等からなる複数の永久磁石３が設けられたロータコア２を有するロータ１と、このロータ１のロータコア２の外周側に同軸に配設されたステータ１１とを備えている。 (Embodiment 1)
FIG. 1 shows a part of a permanent magnet motor M according to Embodiment 1 of the present invention. In this embodiment, the permanent magnet motor M is used as a motor for driving an electric vehicle or a hybrid vehicle, and has a rotor core 2 provided with a plurality of permanent magnets 3 made of rare earth magnets or the like. A rotor 1 and a stator 11 disposed coaxially on the outer peripheral side of the rotor core 2 of the rotor 1 are provided.

上記ロータコア２の中心（ロータ軸心）には、不図示の回転軸（モータ軸）が圧入される貫通孔２ａが形成されており、この貫通孔２ａに圧入された回転軸とロータコア２とがロータ軸心回りに一体で回転する。ロータコア２は、複数の略リング状の電磁鋼板をロータ軸心方向に積層してなるものである。   A through hole 2a into which a rotation shaft (motor shaft) (not shown) is press-fitted is formed at the center (rotor axis) of the rotor core 2. The rotation shaft press-fitted into the through hole 2a and the rotor core 2 are connected to each other. Rotates integrally around the rotor axis. The rotor core 2 is formed by laminating a plurality of substantially ring-shaped electromagnetic steel plates in the rotor axial direction.

尚、本実施形態では、ロータコア２に、永久磁石３と共に、後述の押え部材３１及び規制部材３２が設けられることになるが、これら全てがロータコア２に設けられたものをロータ部４と呼ぶことにする。このロータ部４と上記回転軸とでロータ１が構成されることになる。   In the present embodiment, the rotor core 2 is provided with a pressing member 31 and a regulating member 32 (to be described later) together with the permanent magnet 3, and all of these provided on the rotor core 2 are referred to as the rotor portion 4. To. The rotor 1 is constituted by the rotor portion 4 and the rotating shaft.

上記ステータ１１は、複数の電磁鋼板を積層してなるステータコア１２と、ロータ１を回転させるために、直流電源からインバータを介して通電がなされる巻線２１とを有している。ステータコア１２は、略円環状に形成されたヨーク部１３と、このヨーク部１３の内周面に設けられ、互いにヨーク部１３の周方向に等間隔をあけてヨーク部１３の径方向内側に延出する複数のティース部１４とを有している。これらティース部１４は、略円環状のヨーク部１３の中心軸線（つまりステータコア１２の中心軸線（ロータ軸心と一致））に向かって延びている。上記複数のティース部１４の延出長さは同じである。そして、相隣接するティース部１４間には、上記巻線２１が収容されるスロット部１５が形成されている。   The stator 11 has a stator core 12 formed by laminating a plurality of electromagnetic steel plates, and a winding 21 that is energized from a DC power source via an inverter in order to rotate the rotor 1. The stator core 12 is provided on a yoke portion 13 formed in a substantially annular shape and an inner peripheral surface of the yoke portion 13, and extends radially inward of the yoke portion 13 at equal intervals in the circumferential direction of the yoke portion 13. It has a plurality of teeth portions 14 to be taken out. The teeth portions 14 extend toward the central axis of the substantially annular yoke portion 13 (that is, the central axis of the stator core 12 (coincident with the rotor axis)). The extension lengths of the plurality of teeth portions 14 are the same. A slot portion 15 in which the winding 21 is accommodated is formed between adjacent teeth portions 14.

上記巻線２１は、ティース部１４に分布巻きにより巻回されるようにスロット部１５に収容されている。すなわち、巻線２１（コイル）が、ステータコア１２の全ティース部１４のうち２つ以上のティース部１４に跨って巻回されている。ステータ１１の全巻線２１においてスロット部１５の外部（スロット部１５に対してステータコア１２の中心軸線方向両側）に配置されるコイルエンド部２１ａが、全てのティース部１４におけるステータコア１２の中心軸線方向両側の面を覆うため、該面は見えなくなるが、図１では、コイルエンド部２１ａの一部を省略して、一部のティース部１４が見えるようにしている。   The winding 21 is accommodated in the slot portion 15 so as to be wound around the tooth portion 14 by distributed winding. That is, the winding 21 (coil) is wound over two or more tooth portions 14 among all the tooth portions 14 of the stator core 12. Coil end portions 21 a arranged outside the slot portion 15 (on both sides in the central axis direction of the stator core 12 with respect to the slot portion 15) in all windings 21 of the stator 11 are on both sides in the central axis direction of the stator core 12 in all the tooth portions 14. In FIG. 1, a part of the coil end part 21a is omitted so that a part of the teeth part 14 can be seen.

本実施形態では、上記ヨーク部１３の外周側に、略円筒状のケース部１６が同軸に配設されている。このケース部１６は、鉄で構成されてバックヨークとして用いられている。ヨーク部１３（ステータコア１２）は、ケース部１６の内周部に圧入されて、ヨーク部１３の外周面とケース部１６の内周面とが互いに密着している。   In the present embodiment, a substantially cylindrical case portion 16 is coaxially disposed on the outer peripheral side of the yoke portion 13. The case portion 16 is made of iron and used as a back yoke. The yoke portion 13 (stator core 12) is press-fitted into the inner peripheral portion of the case portion 16, and the outer peripheral surface of the yoke portion 13 and the inner peripheral surface of the case portion 16 are in close contact with each other.

ここで、ヨーク部１３の外周面における周方向の少なくとも１箇所には、ヨーク部１３の中心軸線方向に延びる位置決めキー（図示せず）が突出形成されている。一方、ケース部１６の内周面には、上記位置決めキーが嵌合するキー溝（図示せず）が形成されている。これら位置決めキーとキー溝との嵌合により、ヨーク部１３とケース部１６との周方向の位置決めがなされ、これにより、ヨーク部１３をケース部１６の内周部に圧入した後は、ヨーク部１３がケース部１６に対して回動することはない。   Here, a positioning key (not shown) extending in the direction of the central axis of the yoke portion 13 is formed so as to protrude at at least one location on the outer peripheral surface of the yoke portion 13 in the circumferential direction. On the other hand, a key groove (not shown) into which the positioning key is fitted is formed on the inner peripheral surface of the case portion 16. The yoke portion 13 and the case portion 16 are positioned in the circumferential direction by fitting the positioning key and the key groove. As a result, after the yoke portion 13 is press-fitted into the inner peripheral portion of the case portion 16, the yoke portion 13 does not rotate with respect to the case portion 16.

本実施形態では、ケース部１６は、ウォータジャケット１７を有する水冷式ケース部である。このウォータジャケット１７は、ケース部筒軸方向に延びかつ周方向に間隔をあけて設けられた複数の軸方向延設部１７ａを有し、これら軸方向延設部１７ａは、ケース部１６の筒軸方向一側の端面（図１の手前側の端面）のみに開口している。これらの開口は、ケース部１６の筒軸方向一側の端面に設けられる略円環状の閉塞部（図示せず）によって閉塞される。閉塞部及びケース部１６の筒軸方向他側の端部には、上記複数の軸方向延設部１７ａを直列的に接続するための流路が設けられており、こうして、ケース部１６内を約１周するウォータジャケット１７が形成される。このウォータジャケット１７には、図示を省略する供給管及び排出管が接続されており、供給管を介してウォータジャケット１７に冷却水が供給され、その冷却水がウォータジャケット１７内を流れてケース部１６内を約１周した後、排出管を介して排出される。尚、ウォータジャケット１７は必ずしも必要なものではないが、本実施形態のような車両駆動用モータの場合には、ウォータジャケット１７を設けることが好ましい。   In the present embodiment, the case portion 16 is a water-cooled case portion having a water jacket 17. The water jacket 17 has a plurality of axially extending portions 17 a that extend in the case portion cylinder axial direction and are provided at intervals in the circumferential direction. Opening is made only on one end face in the axial direction (end face on the near side in FIG. 1). These openings are closed by a substantially annular closing portion (not shown) provided on the end surface of the case portion 16 on one side in the cylinder axis direction. A flow path for connecting the plurality of axially extending portions 17a in series is provided at the end of the closing portion and the case portion 16 on the other side in the cylindrical axis direction, and thus the inside of the case portion 16 is provided. A water jacket 17 that makes about one turn is formed. A supply pipe and a discharge pipe (not shown) are connected to the water jacket 17, and cooling water is supplied to the water jacket 17 through the supply pipe, and the cooling water flows through the water jacket 17 to form a case portion. After about one round in 16, it is discharged through the discharge pipe. Although the water jacket 17 is not always necessary, it is preferable to provide the water jacket 17 in the case of a vehicle driving motor as in this embodiment.

図２〜図５に示すように、上記ロータコア２の外周面には、ロータ軸心方向に延びる複数（本実施形態では、８つ）の凹溝部２ｂが、ロータ周方向に等間隔をあけて形成されている（特に図３及び図４参照）。各凹溝部２ｂは、ロータ軸心方向から見て、略台形状をなしている。各凹溝部２ｂの壁面部２ｃは、該壁面部２ｃのロータ周方向中央部に位置する第１壁面部２ｄと、該第１壁面部２ｄのロータ周方向両側からロータ径方向外側に向かって互いの間隔が広がるように延びる第２及び第３壁面部２ｅ，２ｆとを有している。   As shown in FIGS. 2 to 5, a plurality of (eight in this embodiment) concave groove portions 2 b extending in the axial direction of the rotor are formed on the outer peripheral surface of the rotor core 2 at equal intervals in the rotor circumferential direction. (See FIG. 3 and FIG. 4 in particular). Each groove 2b has a substantially trapezoidal shape when viewed from the rotor axial direction. The wall surface portion 2c of each concave groove portion 2b includes a first wall surface portion 2d located at the central portion of the wall surface portion 2c in the circumferential direction of the rotor and a rotor wall surface in both sides of the first wall surface portion 2d from the both sides in the rotor radial direction. The second and third wall surface portions 2e and 2f extend so as to widen the gap.

各凹溝部２ｂ内には、３つの上記永久磁石３が配設されている。これら３つの永久磁石３を一組として、ロータコア２に８組の永久磁石３が設けられており、これにより、ロータ部４において８つの磁極が形成されることになる。永久磁石３のロータ軸心方向の長さは、ロータコア２のロータ軸心方向の長さと略同じである。   Three permanent magnets 3 are disposed in each concave groove 2b. With these three permanent magnets 3 as a set, eight sets of permanent magnets 3 are provided on the rotor core 2, and thereby eight magnetic poles are formed in the rotor portion 4. The length of the permanent magnet 3 in the rotor axial direction is substantially the same as the length of the rotor core 2 in the rotor axial direction.

また、各凹溝部２ｂ内には、該凹溝部２ｂ内の３つの永久磁石３を、該凹溝部２ｂの壁面部２ｃと共に挟持する押え部材３１が配設されている。この押え部材３１も、ロータ軸心方向から見て、略台形状をなしている。押え部材３１は、凹溝部２ｂの第１〜第３壁面部２ｄ〜２ｆとそれぞれ所定間隔をあけて対向する第１〜第３挟持面部３１ａ〜３１ｃを有しており、凹溝部２ｂの第１壁面部２ｄと押え部材３１の第１挟持面部３１ａとの間、凹溝部２ｂの第２壁面部２ｅと押え部材３１の第２挟持面部３１ｂとの間、及び、凹溝部２ｂの第３壁面部２ｆと押え部材３１の第３挟持面部３１ｃとの間に、３つの永久磁石３が互いに間隔をあけた状態で配設されて挟持されている。以下、第１壁面部２ｄと第１挟持面部３１ａとの間に挟持される永久磁石３を、第１永久磁石３ａといい、第２壁面部２ｅと第２挟持面部３１ｂとの間に挟持される永久磁石３を、第２永久磁石３ｂといい、第３壁面部２ｆと第３挟持面部３１ｃとの間に挟持される永久磁石３を、第３永久磁石３ｃという。但し、これら第１〜第３永久磁石３ａ〜３ｂを区別する必要がない場合には、単に永久磁石３という。   Further, in each concave groove portion 2b, a pressing member 31 is provided which clamps the three permanent magnets 3 in the concave groove portion 2b together with the wall surface portion 2c of the concave groove portion 2b. The pressing member 31 also has a substantially trapezoidal shape when viewed from the rotor axial direction. The pressing member 31 includes first to third clamping surface portions 31a to 31c that face the first to third wall surface portions 2d to 2f of the concave groove portion 2b with a predetermined interval, respectively, and the first groove portion 2b has a first groove portion 2b. Between the wall surface portion 2d and the first clamping surface portion 31a of the pressing member 31, between the second wall surface portion 2e of the concave groove portion 2b and the second clamping surface portion 31b of the pressing member 31, and the third wall surface portion of the concave groove portion 2b. Between the 2 f and the third clamping surface portion 31 c of the pressing member 31, the three permanent magnets 3 are disposed and held in a state of being spaced apart from each other. Hereinafter, the permanent magnet 3 sandwiched between the first wall surface portion 2d and the first sandwiching surface portion 31a is referred to as a first permanent magnet 3a, and is sandwiched between the second wall surface portion 2e and the second sandwiching surface portion 31b. The permanent magnet 3 is referred to as a second permanent magnet 3b, and the permanent magnet 3 sandwiched between the third wall surface portion 2f and the third sandwiching surface portion 31c is referred to as a third permanent magnet 3c. However, when it is not necessary to distinguish these first to third permanent magnets 3a to 3b, they are simply referred to as permanent magnets 3.

上記押え部材３１は、複数の電磁鋼板をロータ軸心方向に積層してなるものである。この押え部材３１の電磁鋼板は、ロータコア２の電磁鋼板と同じグレードのものであってもよいが、ロータコア２の電磁鋼板よりも鉄損が少なくなるような、磁気特性が優れたグレードのもの（例えばケイ素添加量が多いグレード）を採用することが好ましい。   The pressing member 31 is formed by laminating a plurality of electromagnetic steel plates in the rotor axial direction. The electromagnetic steel plate of the pressing member 31 may be of the same grade as the electromagnetic steel plate of the rotor core 2, but is of a grade with excellent magnetic properties so that the iron loss is less than that of the electromagnetic steel plate of the rotor core 2 ( For example, it is preferable to employ a grade having a large silicon addition amount.

図３〜図５に示すように、第１〜第３壁面部２ｄ〜２ｆにおける第１〜第３永久磁石３ａ〜３ｂがそれぞれ当接する部分には、僅かに凹んでなる嵌合凹部２ｇがそれぞれ形成されており、各嵌合凹部２ｇに第１〜第３永久磁石３ａ〜３ｂの壁面部２ｃ側の端部が嵌合している。また、第２及び第３壁面部２ｅ，２ｆにおける嵌合凹部２ｇのロータ径方向外側には、ロータ軸心方向に延びる溝部２ｈがそれぞれ形成され、第２及び第３壁面部２ｅ，２ｆにおける該溝部２ｈの更にロータ径方向外側には、ロータ周方向に突出する突出部２ｉがそれぞれ形成されている。これら突出部２ｉは、凹溝部２ｂのロータ径方向外側の開口が狭くなるように互いに近付く側に突出している。   As shown in FIGS. 3 to 5, the fitting recesses 2 g that are slightly recessed are respectively formed in the portions where the first to third permanent magnets 3 a to 3 b abut on the first to third wall surface portions 2 d to 2 f, respectively. The end of the first to third permanent magnets 3a to 3b on the wall surface 2c side is fitted to each fitting recess 2g. Further, on the outer side in the rotor radial direction of the fitting recess 2g in the second and third wall surface portions 2e, 2f, a groove portion 2h extending in the rotor axial direction is formed respectively, and the second and third wall surface portions 2e, 2f Protruding portions 2i that protrude in the rotor circumferential direction are formed on the outer side in the rotor radial direction of the groove portion 2h. These protrusions 2i protrude toward the sides close to each other so that the opening on the outer side in the rotor radial direction of the groove 2b is narrowed.

さらに、各凹溝部２ｂ内には、非磁性の樹脂からなる規制部材３２が配設されている。この規制部材３２の樹脂材料は、例えばＰＰＳ（ポリフェニレンサルファイド）のように、耐熱性を有するものが好ましい。   Further, a regulating member 32 made of nonmagnetic resin is disposed in each concave groove 2b. The resin material of the regulating member 32 is preferably a heat-resistant material such as PPS (polyphenylene sulfide).

上記規制部材３２は、図３及び図４に示すように、ロータ軸心方向から見て、略台形状の枠状部３２ａを有している。この枠状部３２ａは、ロータ軸心方向から見て、凹溝部２ｂと略同じ形状及び大きさを有しており、凹溝部２ｂに対して、ロータ軸心方向から挿入されて嵌合するようになっている。枠状部３２ａが凹溝部２ｂに嵌合したときには、枠状部３２ａの４つの角部が、凹溝部２ｂの壁面部２ｃに当接する。すなわち、枠状部３２ａの４つの角部のちロータ径方向内側の２つの角部が、第１壁面部２ｄの嵌合凹部２ｇと第２壁面部２ｅの嵌合凹部２ｇとの間の部分及び第１壁面部２ｄの嵌合凹部２ｇと第３壁面部２ｆの嵌合凹部２ｇとの間の部分にそれぞれ当接し、ロータ径方向外側の２つの角部が、上記突出部２ｉにそれぞれ当接する。尚、ロータ部４の完成状態では、枠状部３２ａは、凹溝部２ｂの外側にはみ出している。   As shown in FIGS. 3 and 4, the regulating member 32 has a substantially trapezoidal frame-like portion 32 a when viewed from the rotor axial direction. The frame-like portion 32a has substantially the same shape and size as the concave groove portion 2b when viewed from the rotor axial direction, and is inserted into and fitted in the concave groove portion 2b from the rotor axial direction. It has become. When the frame-shaped portion 32a is fitted into the groove portion 2b, the four corner portions of the frame-shaped portion 32a abut against the wall surface portion 2c of the groove portion 2b. That is, two corners on the inner side in the rotor radial direction after the four corners of the frame-like portion 32a are the portions between the fitting recess 2g of the first wall surface portion 2d and the fitting recess 2g of the second wall surface portion 2e, and Two corners on the outer side in the rotor radial direction are in contact with the protrusions 2i, respectively, in contact with portions between the fitting recess 2g of the first wall surface portion 2d and the fitting recess 2g of the third wall surface portion 2f. . In the completed state of the rotor part 4, the frame-like part 32a protrudes outside the concave groove part 2b.

上記枠状部３２ａの４つの角部におけるロータ軸心方向一側の面には、ロータ軸心方向一側に延びる第１〜第４支持部３２ｂ〜３２ｅがそれぞれ設けられている。第１〜第４支持部３２ｂ〜３２ｅのうちロータ径方向外側に位置するものが第１及び第２支持部３２ｂ，３２ｃであり、ロータ径方向内側に位置するものが第３及び第４支持部３２ｄ，３２ｅである。第１〜第４支持部３２ｂ〜３２ｅの長さは、ロータコア２のロータ軸心方向の長さと略同じであるが、各支持部３２ｂ〜３２ｅの先端にそれぞれ設けられた後述のストッパ部３２ｆの分だけ、ロータコア２のロータ軸心方向の長さに対して僅かに長くなっている。   First to fourth support portions 32b to 32e extending to one side in the rotor axial direction are provided on surfaces on one side in the rotor axial direction at the four corners of the frame-shaped portion 32a. Among the first to fourth support parts 32b to 32e, the ones located on the outer side in the rotor radial direction are the first and second support parts 32b and 32c, and the ones located on the inner side in the rotor radial direction are the third and fourth support parts. 32d and 32e. The lengths of the first to fourth support portions 32b to 32e are substantially the same as the length of the rotor core 2 in the rotor axial direction, but a stopper portion 32f described later provided at the tip of each support portion 32b to 32e, respectively. Therefore, the length of the rotor core 2 is slightly longer than the length of the rotor core 2 in the axial direction of the rotor.

枠状部３２ａは、規制部材３２を凹溝部２ｂに挿入する前に、規制部材３２が押え部材３１及び３つの永久磁石３を支持して、この支持状態で規制部材３２を凹溝部２ｂに対してロータ軸心方向一側から挿入し易くするために設けたものであり、ロータ部４の完成状態では、基本的に必要なものではない。また、後述の各ストッパ部３２ｆは、上記支持状態の規制部材３２の挿入完了で、ロータコア２のロータ軸心方向一側の面に当接して、規制部材３２をそれ以上挿入させないようするためのものであり、各ストッパ部３２ｆも、ロータ部４の完成状態では、基本的に必要なものではない。ロータ部４の完成状態で、ストッパ部３２ｆを除く第１〜第４支持部３２ｂ〜３２ｅ、３つの永久磁石３及び押え部材３１が、凹溝部２ｂ内に配設されることになる。   The frame-shaped part 32a supports the pressing member 31 and the three permanent magnets 3 before the restricting member 32 is inserted into the recessed groove part 2b, and the restricting member 32 is supported with respect to the recessed groove part 2b in this supported state. This is provided for facilitating insertion from one side in the rotor axial direction, and is not basically required when the rotor portion 4 is completed. Each of the stopper portions 32f, which will be described later, is in contact with the surface of the rotor core 2 on one side in the axial direction of the rotor core 2 when insertion of the supporting member 32 is completed, and prevents the restricting member 32 from being inserted further. The stopper portions 32f are basically not necessary when the rotor portion 4 is completed. In the completed state of the rotor part 4, the first to fourth support parts 32b to 32e excluding the stopper part 32f, the three permanent magnets 3 and the pressing member 31 are arranged in the concave groove part 2b.

第１及び第２支持部３２ｂ，３２ｃにおけるロータ周方向に相対向する面とは反対側の面には、上記溝部２ｈに嵌合する突起部３２ｇが、ロータ軸心方向の全体に亘って延びるようにそれぞれ形成されており、該突起部３２ｇは、枠状部３２ａにまで連続して延びている。第１及び第２支持部３２ｂ，３２ｃは、枠状部３２ａのロータ径方向外側の２つの角部と同様に、上記突出部２ｉにそれぞれ当接している。これにより、第１及び第２支持部３２ｂ，３２ｃは、ロータ周方向における両支持部３２ｂ，３２ｃの間隔が広がる側や、ロータ径方向外側には変形できないようになっている。第１及び第２支持部３２ｂ，３２ｃ並びに枠状部３２ａにおけるロータ径方向外側の面の半径は、ロータコア２の外周面の半径と同じであり、第１及び第２支持部３２ｂ，３２ｃ並びに枠状部３２ａにおけるロータ径方向外側の面とロータコア２の外周面とは、ロータ軸心方向から見て同じ円周上に位置する。第１及び第２支持部３２ｂ，３２ｃの先端には、ロータ周方向における両支持部３２ｂ，３２ｃが離れる側に突出するストッパ部３２ｆがそれぞれ形成されている。   On the surface of the first and second support portions 32b and 32c opposite to the surfaces facing each other in the circumferential direction of the rotor, a protrusion 32g fitted into the groove 2h extends over the entire rotor axial direction. Each of the protrusions 32g extends continuously to the frame-like portion 32a. The first and second support portions 32b and 32c are in contact with the protruding portions 2i in the same manner as the two corner portions on the outer side in the rotor radial direction of the frame-shaped portion 32a. As a result, the first and second support portions 32b and 32c cannot be deformed to the side where the distance between the support portions 32b and 32c in the circumferential direction of the rotor is increased or to the outside in the rotor radial direction. The radius of the outer surface in the rotor radial direction of the first and second support portions 32b and 32c and the frame-like portion 32a is the same as the radius of the outer peripheral surface of the rotor core 2, and the first and second support portions 32b and 32c and the frame The outer surface in the rotor radial direction of the shaped portion 32a and the outer peripheral surface of the rotor core 2 are located on the same circumference when viewed from the rotor axial direction. At the tips of the first and second support portions 32b and 32c, stopper portions 32f are formed that protrude to the side where both the support portions 32b and 32c are separated in the circumferential direction of the rotor.

第３支持部３２ｄは、第１及び第２永久磁石３ａ，３ｂ間に位置していて、ロータ軸心方向から見て略Ｖ字状をなす２つの立壁部３２ｈを有している。これら２つの立壁部３２ｈにおける壁面部２ｃ側の面は、第１及び第２壁面部２ｄ，２ｅにそれぞれ当接している。２つの立壁部３２ｈにおける相対向する面とは反対側の面は、第１及び第２永久磁石３ａ，３ｂにそれぞれ当接している。第３支持部３２ｄにおける２つの立壁部３２ｈの先端には、ロータ径方向内側に突出するストッパ部３２ｆがそれぞれ形成されている。   The third support portion 32d is positioned between the first and second permanent magnets 3a and 3b, and has two standing wall portions 32h that are substantially V-shaped when viewed from the rotor axial direction. Surfaces of the two standing wall portions 32h on the wall surface portion 2c side are in contact with the first and second wall surface portions 2d and 2e, respectively. The opposite surfaces of the two standing wall portions 32h are in contact with the first and second permanent magnets 3a and 3b, respectively. A stopper portion 32f that protrudes inward in the rotor radial direction is formed at the tip of the two standing wall portions 32h of the third support portion 32d.

また、第４支持部３２ｅは、第１及び第３永久磁石３ａ，３ｃ間に位置していて、第３支持部３２ｄと同様に、ロータ軸心方向から見て略Ｖ字状をなす２つの立壁部３２ｉを有している。これら２つの立壁部３２ｉにおける壁面部２ｃ側の面は、第１及び第３壁面部２ｄ，２ｆにそれぞれ当接している。２つの立壁部３２ｉにおける相対向する面とは反対側の面は、第１及び第３永久磁石３ａ，３ｃにそれぞれ当接している。第４支持部３２ｅにおける２つの立壁部３２ｉの先端にも、ロータ径方向内側に突出するストッパ部３２ｆがそれぞれ形成されている。   Further, the fourth support portion 32e is located between the first and third permanent magnets 3a and 3c and, like the third support portion 32d, has two V-shapes when viewed from the rotor axial direction. It has the standing wall part 32i. The surface of the two standing wall portions 32i on the wall surface portion 2c side is in contact with the first and third wall surface portions 2d and 2f, respectively. The opposite surfaces of the two standing wall portions 32i are in contact with the first and third permanent magnets 3a and 3c, respectively. Stopper portions 32f that protrude inward in the rotor radial direction are also formed at the tips of the two standing wall portions 32i in the fourth support portion 32e.

上記押え部材３１は、上記第１〜第４支持部３２ｂ〜３２ｅ間に支持されるようになっている。すなわち、押え部材３１のロータ軸心方向から見た４つの角部に第１〜第４支持部３２ｂ〜３２ｅがそれぞれ当接して、第１〜第４支持部３２ｂ〜３２ｅが押え部材３１を挟むように支持している。そして、図５に示すように、ロータ軸心方向から見て、押え部材３１におけるロータ径方向外側の２つの角部は、比較的大きな半径を有するＲ面取りがなされている。第１及び第２支持部３２ｂ，３２ｃのロータ周方向に相対向する面も、上記角部に対応した形状をなしており、第１及び第２支持部３２ｂ，３２ｃは、押え部材３１のロータ径方向外側に回り込むことになる。これにより、規制部材３２の第１及び第２支持部３２ｂ，３２ｃは、該規制部材３２が配設された凹溝部２ｂ内の押え部材３１のロータ径方向外側より該押え部材３１を支持することになる。押え部材３１におけるロータ径方向内側の２つの角部は、第３及び第４支持部３２ｄ，３２ｅにおけるロータ径方向内側の面に当接している。尚、押え部材３１におけるロータ径方向外側の面（第１及び第２支持部３２ｂ，３２ｃにより支持される２つの角部を除く）は、ロータコア２の外周面と、ロータ軸心方向から見て同じ円周上に位置している。   The pressing member 31 is supported between the first to fourth support portions 32b to 32e. In other words, the first to fourth support portions 32 b to 32 e abut on the four corner portions of the presser member 31 viewed from the rotor axial direction, and the first to fourth support portions 32 b to 32 e sandwich the presser member 31. I support it. As shown in FIG. 5, the two corners on the outer side in the rotor radial direction of the presser member 31 as viewed from the rotor axial direction are rounded with a chamfer having a relatively large radius. The surfaces of the first and second support portions 32 b and 32 c that are opposed to each other in the rotor circumferential direction also have a shape corresponding to the corner portion, and the first and second support portions 32 b and 32 c are the rotors of the pressing member 31. It will wrap around radially outward. Thus, the first and second support portions 32b and 32c of the regulating member 32 support the holding member 31 from the outer side in the rotor radial direction of the holding member 31 in the recessed groove portion 2b in which the regulating member 32 is disposed. become. Two corners on the inner side in the rotor radial direction of the pressing member 31 are in contact with the inner surfaces in the rotor radial direction on the third and fourth support portions 32d and 32e. Note that the outer surface of the pressing member 31 in the rotor radial direction (excluding the two corners supported by the first and second support portions 32b and 32c) is viewed from the outer peripheral surface of the rotor core 2 and the rotor axial direction. Located on the same circumference.

図示は省略するが、第３支持部３２ｄにおける２つの立壁部３２ｈの間、及び、第４支持部３２ｅにおける２つの立壁部３２ｉの間、つまり、押え部材３１と凹溝部２ｂの壁面部２ｃとの間における３つの永久磁石３の間には、樹脂が充填されている。この樹脂は、液状のものが充填後に硬化したものである。このような樹脂としては、例えば１液性エポキシ樹脂組成物接着剤のような１液性の接着剤が好ましい。上記樹脂は、規制部材３２が押え部材３１及び３つの永久磁石３を支持した状態で凹溝部２ｂに挿入された後に充填されて、やがて硬化する。   Although not shown, between the two standing wall portions 32h of the third support portion 32d and between the two standing wall portions 32i of the fourth support portion 32e, that is, the pressing member 31 and the wall surface portion 2c of the groove portion 2b A resin is filled between the three permanent magnets 3. This resin is obtained by curing a liquid material after filling. As such a resin, for example, a one-component adhesive such as a one-component epoxy resin composition adhesive is preferable. The resin is filled after the regulating member 32 is inserted into the concave groove portion 2b in a state where the pressing member 31 and the three permanent magnets 3 are supported, and is eventually cured.

上記樹脂の充填により、規制部材３２が凹溝部２ｂの壁面部２ｃに固定される。また、第３支部部３２ｄの２つの立壁部３２ｈが、上記樹脂により両立壁部３２ｈの間隔が広がるように押圧され、これにより、第１永久磁石３ａが第４支持部３２ｅの側へ押圧されるとともに、第２永久磁石３ｂが第１支持部３２ｂの側へ押圧される。さらに、第４支部部３２ｅの２つの立壁部３２ｉが、上記樹脂により両立壁部３２ｉの間隔が広がるように押圧され、これにより、第１永久磁石３ａが第３支持部３２ｄの側へ押圧されるとともに、第３永久磁石３ｂが第２支持部３２ｃの側へ押圧される。したがって、第１永久磁石３ａは、第３及び第４支持部３２ｄ，３２ｅ間に固定される。また、第１及び第２支持部３２ｂ，３２ｃは突出部２ｉにそれぞれ当接しているとともに、突起部３２ｇが溝部２ｈにそれぞれ嵌合しているので、第２永久磁石３ｂは、第１及び第３支持部３２ｂ，３２ｄ間に固定され、第３永久磁石３ｃは、第２及び第４支持部３２ｃ，３２ｅ間に固定されることになる。   The regulation member 32 is fixed to the wall surface portion 2c of the concave groove portion 2b by filling the resin. Further, the two standing wall portions 32h of the third support portion 32d are pressed by the resin so that the interval between the compatible wall portions 32h is widened, and thereby the first permanent magnet 3a is pressed toward the fourth support portion 32e. At the same time, the second permanent magnet 3b is pressed toward the first support portion 32b. Furthermore, the two standing wall portions 32i of the fourth support portion 32e are pressed by the resin so that the interval between the compatible wall portions 32i is widened, and thereby the first permanent magnet 3a is pressed toward the third support portion 32d. At the same time, the third permanent magnet 3b is pressed toward the second support portion 32c. Accordingly, the first permanent magnet 3a is fixed between the third and fourth support portions 32d and 32e. In addition, the first and second support portions 32b and 32c are in contact with the protruding portion 2i, and the protruding portion 32g is fitted in the groove portion 2h. Therefore, the second permanent magnet 3b The third permanent magnet 3c is fixed between the second and fourth support portions 32c and 32e, and is fixed between the third support portions 32b and 32d.

また、上記樹脂の充填により、第３及び第４支持部３２ｄ，３２ｅがロータ径方向外側へ押圧される。これにより、押え部材３１がロータ径方向外側へ押圧されるが、押え部材３１は第１及び第２支持部３２ｂ，３２ｃによってロータ径方向外側へ移動することはできない。この状態で、押え部材３１は、第１〜第３挟持面部３１ａ〜３１ｃにて、第１〜第３永久磁石３ａ〜３ｃを、第１〜第３壁面部２ｄ〜２ｆに対しそれぞれ押圧している。   Moreover, the 3rd and 4th support parts 32d and 32e are pressed to the rotor radial direction outer side by filling of the said resin. Thereby, although the pressing member 31 is pressed outward in the rotor radial direction, the pressing member 31 cannot move outward in the rotor radial direction by the first and second support portions 32b and 32c. In this state, the pressing member 31 presses the first to third permanent magnets 3a to 3c against the first to third wall surface portions 2d to 2f by the first to third clamping surface portions 31a to 31c, respectively. Yes.

さらに、上記樹脂の充填により、凹溝部２ｂ内には、隙間がなくなり、永久磁石３、押え部材３１及び規制部材３２間のがたつきがなくなる。この結果、永久磁石３及び押え部材３１は、ロータ軸心方向に垂直な平面内においてどの方向にも移動することができなくなるとともに、凹溝部２ｂの壁面部２ｃ、永久磁石３、押え部材３１及び規制部材３２（第１〜第４支持部３２ｂ〜３２ｅ）が互いに押圧されているので、永久磁石３及び押え部材３１は、ロータ軸心方向にも移動できなくなる。こうして、規制部材３２は、凹溝部２ｂの壁面部２ｃと協働して、押え部材３１の移動を規制することになる。   Furthermore, by filling the resin, there is no gap in the recessed groove portion 2b, and rattling between the permanent magnet 3, the pressing member 31, and the regulating member 32 is eliminated. As a result, the permanent magnet 3 and the pressing member 31 cannot move in any direction within a plane perpendicular to the rotor axial direction, and the wall surface portion 2c of the recessed groove portion 2b, the permanent magnet 3, the pressing member 31, and Since the regulating member 32 (the first to fourth support portions 32b to 32e) is pressed against each other, the permanent magnet 3 and the pressing member 31 cannot move in the rotor axial direction. In this way, the regulating member 32 regulates the movement of the pressing member 31 in cooperation with the wall surface portion 2c of the concave groove portion 2b.

上記ロータ１を製造するには、先ず、回転軸（モータ軸）、ロータコア２、永久磁石３、押え部材３１及び規制部材３２をそれぞれ別々に製造しておく。   In order to manufacture the rotor 1, first, the rotating shaft (motor shaft), the rotor core 2, the permanent magnet 3, the pressing member 31 and the regulating member 32 are separately manufactured.

続いて、規制部材３２の第１〜第４支持部３２ｂ〜３２ｅの間に押え部材３１を枠状部３２ａの反対側から挿入するとともに、第３及び第４支持部３２ｄ，３２ｅ間に第１永久磁石３ａを、第１及び第３支持部３２ｂ，３２ｄ間に第２永久磁石３ｂを、第２及び第４支持部３２ｃ，３２ｅ間に第３永久磁石３ｃを、それぞれ挿入する。   Subsequently, the pressing member 31 is inserted between the first to fourth support portions 32b to 32e of the restricting member 32 from the opposite side of the frame-shaped portion 32a, and the first between the third and fourth support portions 32d and 32e. The permanent magnet 3a is inserted between the first and third support portions 32b and 32d, and the third permanent magnet 3c is inserted between the second and fourth support portions 32c and 32e.

次いで、上記規制部材３２を、押え部材３１及び３つの永久磁石３を支持した状態で、ロータコア２の凹溝部２ｂに対してロータ軸心方向一側から挿入する。このとき、規制部材３２を、枠状部３２ａが前側になるように移動させる。第１〜第４支持部３２ｂ〜３２ｅの各ストッパ部３２ｆがロータ軸心方向一側の面に当接したとき、規制部材３２の挿入は完了する。そして、規制部材３２の挿入を、ロータコア２の全ての凹溝部２ｂに対して行う。   Next, the regulating member 32 is inserted into the concave groove portion 2 b of the rotor core 2 from one side in the rotor axial direction while supporting the pressing member 31 and the three permanent magnets 3. At this time, the regulating member 32 is moved so that the frame-like portion 32a is on the front side. When the stopper portions 32f of the first to fourth support portions 32b to 32e come into contact with the surface on one side in the rotor axial direction, the insertion of the regulating member 32 is completed. Then, the restriction member 32 is inserted into all the recessed groove portions 2 b of the rotor core 2.

その後、各凹溝部２ｂにおいて第３支持部３２ｄにおける２つの立壁部３２ｈの間、及び、第４支持部３２ｅにおける２つの立壁部３２ｉの間に、上記樹脂を充填して、その樹脂を硬化させ、こうして、ロータ部４が完成する。尚、上記樹脂の充填を、１つの凹溝部２ｂに上記規制部材３２を挿入する毎に行うようにしてもよい。   Thereafter, the resin is filled between the two standing wall portions 32h of the third support portion 32d and between the two standing wall portions 32i of the fourth support portion 32e in each concave groove portion 2b, and the resin is cured. Thus, the rotor unit 4 is completed. The resin filling may be performed every time the regulating member 32 is inserted into one concave groove 2b.

最後に、上記ロータ部４のロータコア２の貫通孔２ａに回転軸を圧入して、ロータ１が完成する。尚、ロータコア２の凹溝部２ｂに上記規制部材３２を挿入する前に、予めロータコア２の貫通孔２ａに回転軸を圧入しておいてもよい。   Finally, the rotary shaft is press-fitted into the through hole 2a of the rotor core 2 of the rotor part 4 to complete the rotor 1. In addition, before inserting the said limitation member 32 in the ditch | groove part 2b of the rotor core 2, you may press-fit a rotating shaft in the through-hole 2a of the rotor core 2 previously.

したがって、本実施形態では、ロータコア２とは別体の押え部材３１により、凹溝部２ｂの壁面部２ｃと共に永久磁石３を挟持したので、永久磁石３からの漏れ磁束の発生を防止することができる。また、凹溝部２ｂ内に規制部材３２を配設して、この規制部材３２が、押え部材３１のロータ径方向外側より該押え部材３１を支持するとともに、凹溝部２の壁面部２ｃと協働して、該押え部材３１の移動を規制するようにしたので、ロータコア２のロータ軸心方向の両側に、押え部材３１を固定するための部材を配設する必要はない。この結果、永久磁石式モータＭのロータ軸心方向の長さが長くならずに済むとともに、低コストで済む。   Therefore, in the present embodiment, since the permanent magnet 3 is sandwiched together with the wall surface portion 2c of the recessed groove portion 2b by the pressing member 31 separate from the rotor core 2, the generation of leakage magnetic flux from the permanent magnet 3 can be prevented. . In addition, a regulating member 32 is disposed in the recessed groove portion 2 b, and the regulating member 32 supports the holding member 31 from the outer side in the rotor radial direction of the holding member 31 and cooperates with the wall surface portion 2 c of the recessed groove portion 2. Then, since the movement of the pressing member 31 is restricted, it is not necessary to provide members for fixing the pressing member 31 on both sides of the rotor core 2 in the rotor axial direction. As a result, the length of the permanent magnet motor M in the rotor axial direction does not have to be increased, and the cost can be reduced.

（実施形態２）
図６は、本発明の実施形態２を示し、ロータ１において、上記実施形態１と同様のロータ部４（ロータコア２）を複数（図６では、２つ）設けるようにしたものである。 (Embodiment 2)
FIG. 6 shows a second embodiment of the present invention. In the rotor 1, a plurality of rotor portions 4 (rotor cores 2) similar to those in the first embodiment are provided (two in FIG. 6).

すなわち、本実施形態では、不図示の回転軸（モータ軸）が複数のロータコア２の貫通孔２ａを連続的に貫通するように圧入されて、該回転軸上において、各凹溝部２ｂ内に永久磁石３、押え部材３１及び規制部材３２が配設された複数のロータコア２（ロータ部４）がロータ軸心方向に積層された状態となっている。図６では、２つのロータ部４が、規制部材３２の枠状部３２ａ同士が対向するように積層されているが、各ロータ部４のロータ軸心方向の向きは、これには限られず、同じ向きを向くようにしてもよい。   That is, in this embodiment, a rotating shaft (motor shaft) (not shown) is press-fitted so as to continuously pass through the through-holes 2a of the plurality of rotor cores 2, and is permanently inserted into the concave grooves 2b on the rotating shaft. A plurality of rotor cores 2 (rotor portions 4) provided with the magnet 3, the pressing member 31, and the regulating member 32 are stacked in the rotor axial direction. In FIG. 6, the two rotor parts 4 are stacked so that the frame-like parts 32 a of the regulating member 32 face each other, but the orientation of the rotor axial direction of each rotor part 4 is not limited to this, You may make it face the same direction.

上記実施形態１のロータ部４では、規制部材３２の枠状部３２ａ及びストッパ部３２ｆが凹溝部２ｂからはみ出しているので、複数のロータコア２は、枠状部３２ａ及びストッパ部３２ｆの少なくとも一方を介して積層されることになる。しかし、枠状部３２ａ及びストッパ部３２ｆの強度は、ロータコア２のロータ軸心方向の両側に設けられる、押え部材３１を固定するための部材よりも低い強度で済むので、上記はみ出し量は、押え部材３１を固定するための上記部材の厚みよりも小さくて済む。また、枠状部３２ａ及びストッパ部３２ｆをなくせば、複数のロータコア２同士は互いに直に接触することになる。   In the rotor portion 4 of the first embodiment, since the frame-shaped portion 32a and the stopper portion 32f of the regulating member 32 protrude from the concave groove portion 2b, the plurality of rotor cores 2 have at least one of the frame-shaped portion 32a and the stopper portion 32f. Will be stacked. However, the strength of the frame-shaped portion 32a and the stopper portion 32f is lower than that of the member for fixing the presser member 31 provided on both sides of the rotor core 2 in the axial direction of the rotor. It may be smaller than the thickness of the member for fixing the member 31. Further, if the frame-shaped portion 32a and the stopper portion 32f are eliminated, the plurality of rotor cores 2 come into direct contact with each other.

上記複数のロータコア２における各凹溝部２ｂの周方向の位置は、該複数のロータコア２間で互いに周方向にずれている。そして、相隣接する任意の２つのロータコア２のうちロータ軸心方向一側のロータコア２の各凹溝部２ｂの周方向の位置が、ロータ軸心方向他側のロータコア２の各凹溝部２ｂに対して周方向一側に所定角度だけずれている。すなわち、複数のロータコア２のうちロータ軸心方向一側の端に位置するロータコア２を除く全ロータコア２の各凹溝部２ｂの周方向の位置が、ロータ軸心方向一側の端に位置するロータコア２に対して周方向の同じ側にずれており、ロータ軸心方向一側の端からｎ番目（ｎは２以上の自然数）のロータコア２の各凹溝部２ｂの上記ずれ量は、上記所定角度の（ｎ−１）倍とされる。上記所定角度は、永久磁石式モータＭのコギングトルクや出力トルク変動（トルクリプル）を小さくすることが可能な角度に設定され、上記所定角度の上限値は、ｍ個のロータコア２の場合、凹溝部２ｂのピッチ角度（８つの凹溝部２ｂの場合、４５°）の１／（ｍ−１）である。   The circumferential positions of the concave groove portions 2b in the plurality of rotor cores 2 are shifted from each other in the circumferential direction between the plurality of rotor cores 2. And the position of the circumferential direction of each concave groove part 2b of the rotor core 2 of the rotor axial direction one side among the arbitrary two rotor cores 2 adjacent to each other is relative to each concave groove part 2b of the rotor core 2 on the other side in the rotor axial direction. Therefore, it is shifted by a predetermined angle to one side in the circumferential direction. That is, a rotor core in which the circumferential position of each concave groove portion 2b of all the rotor cores 2 excluding the rotor core 2 located at one end in the rotor axial direction among the plurality of rotor cores 2 is located at one end in the rotor axial direction. 2 is shifted to the same side in the circumferential direction, and the shift amount of each concave groove 2b of the n-th (n is a natural number of 2 or more) rotor core 2 from the end on one side in the rotor axial direction is the predetermined angle. (N-1) times. The predetermined angle is set to an angle at which the cogging torque and output torque fluctuation (torque ripple) of the permanent magnet motor M can be reduced. The upper limit value of the predetermined angle is a concave groove portion in the case of m rotor cores 2. It is 1 / (m−1) of a pitch angle of 2b (45 ° in the case of eight concave groove portions 2b).

上記ロータ１を製造するには、上記実施形態１と同様にしてロータ部４を製造して、複数のロータ部４を準備する。尚、本実施形態では、図示は省略するが、回転軸とロータコア２の貫通孔２ａとの周方向の位置決めを行えるように、回転軸には位置決めキーが設けられ、ロータコア２の貫通孔２ａには、その位置決めキーが嵌合するキー溝が設けられる。キー溝の周方向の位置は、複数のロータ部４間で互いにずれることになる。 In order to manufacture the rotor 1, the rotor unit 4 is manufactured in the same manner as in the first embodiment, and a plurality of rotor units 4 are prepared. In this embodiment, although not shown, a positioning key is provided on the rotating shaft so that the rotating shaft and the through hole 2a of the rotor core 2 can be positioned in the circumferential direction. Is provided with a keyway into which the positioning key is fitted. Circumferential position of the keyway will be Fig each other between the plurality of rotor 4.

上記複数のロータ部４を順次回転軸上に周方向に位置決めしながら、互いに積層されるようにセットしていく。こうして回転軸上にセットされた複数のロータ部４のロータコア２における各凹溝部２ｂの周方向の位置は、該複数のロータコア２間で互いに周方向にずれることになる。   The plurality of rotor portions 4 are set so as to be stacked on each other while being sequentially positioned on the rotation axis in the circumferential direction. Thus, the circumferential positions of the concave groove portions 2b in the rotor core 2 of the plurality of rotor portions 4 set on the rotation shaft are shifted in the circumferential direction between the plurality of rotor cores 2.

尚、２つのロータ部４の場合には、回転軸上に、凹溝部２ｂに規制部材３２を挿入する前の２つのロータコア２をセットした後、両ロータコア２の凹溝部２ｂに、押え部材３１及び３つの永久磁石３を支持した状態の規制部材３２を挿入することが可能である。このようにした場合、２つのロータ部４が、規制部材３２の枠状部３２ａ同士が対向するように積層されることになる。   In the case of the two rotor portions 4, the two rotor cores 2 before the restriction member 32 is inserted into the concave groove portion 2 b are set on the rotating shaft, and then the pressing member 31 is inserted into the concave groove portions 2 b of both rotor cores 2. And it is possible to insert the regulating member 32 in a state where the three permanent magnets 3 are supported. In such a case, the two rotor parts 4 are laminated so that the frame-like parts 32a of the regulating member 32 face each other.

したがって、本実施形態では、永久磁石式モータＭのコギングトルクや出力トルク変動を小さくすることができる。一方、複数のモータ部４（ロータコア２）をロータ軸心方向に積層したとしても、各ロータコア２のロータ軸心方向の両側に、押え部材３１を固定するための部材が存在しないことから、永久磁石式モータＭのロータ軸心方向の長さを出来る限り長くならないようにすることができるとともに、コストアップを出来る限り抑制することができる。また、押え部材３１を固定するための上記部材を設けることによるモータ効率の低下を抑制することができる。   Therefore, in this embodiment, the cogging torque and output torque fluctuation of the permanent magnet motor M can be reduced. On the other hand, even if a plurality of motor parts 4 (rotor cores 2) are stacked in the rotor axial direction, there are no members for fixing the pressing members 31 on both sides of each rotor core 2 in the rotor axial direction. The length of the magnet motor M in the axial direction of the rotor can be prevented from becoming as long as possible, and the cost increase can be suppressed as much as possible. Moreover, the fall of the motor efficiency by providing the said member for fixing the pressing member 31 can be suppressed.

（実施形態３）
図７及び図８は、本発明の実施形態３を示し、押え部材３１及び規制部材３２の形状を、上記実施形態１とは異ならせたものであり、その他の構成は、上記実施形態１のロータ１のロータ部４と同様である。 (Embodiment 3)
7 and 8 show the third embodiment of the present invention, in which the shape of the pressing member 31 and the regulating member 32 is different from that of the first embodiment, and other configurations are the same as those of the first embodiment. This is the same as the rotor part 4 of the rotor 1.

すなわち、本実施形態では、押え部材３１のロータ径方向外側の面におけるロータ周方向両端部に、そのロータ周方向中央側の部分に対してロータ径方向内側に凹む段差部３１ｄがそれぞれ形成されている。これら両段差部３１ｄのロータ径方向外側に、規制部材３２の第１及び第２支持部３２ｂ，３２ｃがそれぞれ位置して押え部材３１を支持している。   That is, in the present embodiment, stepped portions 31d that are recessed inwardly in the rotor radial direction with respect to the central portion in the rotor circumferential direction are formed on both ends in the rotor circumferential direction on the outer surface of the presser member 31 in the radial direction of the rotor. Yes. The first and second support portions 32b and 32c of the restricting member 32 are respectively positioned outside the stepped portions 31d in the rotor radial direction to support the pressing member 31.

上記各段差部３１ｄの幅（ロータ周方向の長さ）は、ロータ軸心方向の一側から他側に向かって大きくなるようになされており、これにより、両段差部３１ｄの間隔、つまり、押え部材３１のロータ径方向外側の面における段差部３１ｄがない部分のロータ周方向の長さが、ロータ軸心方向の一側から他側に向かって狭くなるようになっている。また、段差部３１ｄに対応して、第１及び第２支持部３２ｂ，３２ｃの間隔も、ロータ軸心方向の一側から他側に向かって狭くなるようになっている。これにより、押え部材３１のロータ径方向外側の面において第１及び第２支持部３２ｂ，３２ｃによって覆われていない部分のロータ周方向の長さが、ロータ軸心方向の一側から他側に向かって小さくなっている。   The width of each step 31d (the length in the circumferential direction of the rotor) is increased from one side to the other side in the rotor axial direction, whereby the distance between both stepped portions 31d, that is, The length in the rotor circumferential direction of the portion where the stepped portion 31d is not present on the outer surface in the rotor radial direction of the pressing member 31 is narrowed from one side to the other side in the rotor axial direction. Corresponding to the stepped portion 31d, the distance between the first and second support portions 32b and 32c is also narrowed from one side to the other side in the rotor axial direction. As a result, the length in the rotor circumferential direction of the portion not covered by the first and second support portions 32b and 32c on the outer surface in the rotor radial direction of the pressing member 31 is changed from one side to the other side in the rotor axial direction. It is getting smaller.

このような構成により、上記実施形態２と同様に、永久磁石式モータＭのコギングトルクや出力トルク変動を小さくすることができるようになる。すなわち、本実施形態では、上記実施形態２のように複数のロータ部４（ロータコア２）を積層しなくても、永久磁石式モータＭのコギングトルクや出力トルク変動を小さくすることができる。よって、永久磁石式モータＭのロータ軸心方向の長さをより短くしつつ、より低コストで、上記実施形態２と同様の作用効果が得られる。   With such a configuration, the cogging torque and output torque fluctuation of the permanent magnet motor M can be reduced as in the second embodiment. That is, in this embodiment, the cogging torque and output torque fluctuation of the permanent magnet motor M can be reduced without stacking the plurality of rotor portions 4 (rotor cores 2) as in the second embodiment. Therefore, the same effects as those of the second embodiment can be obtained at a lower cost while further reducing the length of the permanent magnet motor M in the axial direction of the rotor.

（実施形態４）
図９は、本発明の実施形態４を示し、各凹溝部２ｂ内に永久磁石３、押え部材３１及び規制部材３２が配設されたロータコア２の外周面に、該外周面全周を覆うカバー部材３５を設けたものであり、その他の構成は、上記実施形態１のロータ１のロータ部４と同様である。 (Embodiment 4)
FIG. 9 shows Embodiment 4 of the present invention, and a cover that covers the entire circumference of the outer peripheral surface of the rotor core 2 in which the permanent magnet 3, the pressing member 31, and the regulating member 32 are disposed in each concave groove 2b. The member 35 is provided, and other configurations are the same as those of the rotor portion 4 of the rotor 1 of the first embodiment.

このカバー部材３５は、非磁性体でかつ導体（例えばアルミニウム）で構成されていることが好ましい。また、カバー部材３５の厚みは、所定値以下に設定されて、ロータコア２の外周面とステータコア１２のティース部１４の先端面との間隔を広げなくても済むように十分に薄くしている（例えば０．２ｍｍ〜０．３ｍｍ程度）。   The cover member 35 is preferably made of a nonmagnetic material and a conductor (for example, aluminum). Further, the thickness of the cover member 35 is set to a predetermined value or less, and is sufficiently thin so that it is not necessary to widen the distance between the outer peripheral surface of the rotor core 2 and the tip end surface of the teeth portion 14 of the stator core 12 ( For example, about 0.2 mm to 0.3 mm).

このようにカバー部材３５を、厚みの薄い非磁性体でかつ導体で構成すれば、表皮効果を利用して、特にインバータのスイッチング作用に伴って生じる高周波電流をカバー部材３５に流すことができ、ロータコア２の発熱を抑制することができる。また、押え部材３１がロータ１の回転により特にロータ径方向外側へ移動しようとしても、カバー部材３５によって、その移動をより確実に規制することができる。   If the cover member 35 is formed of a thin non-magnetic material and a conductor in this way, the skin effect can be used to flow a high-frequency current generated particularly with the switching action of the inverter to the cover member 35. Heat generation of the rotor core 2 can be suppressed. Even if the presser member 31 tries to move particularly outward in the rotor radial direction by the rotation of the rotor 1, the movement can be more reliably restricted by the cover member 35.

本発明は、上記実施形態に限られるものではなく、請求の範囲の主旨を逸脱しない範囲で代用が可能である。   The present invention is not limited to the embodiment described above, and can be substituted without departing from the spirit of the claims.

例えば、上記実施形態では、各凹溝部２ｂ内に設けられる永久磁石３の数は３つであるが、これには限らず、例えば２つとして、２つの永久磁石３を、ロータ軸心方向から見て、ロータ径方向外側に行く程間隔が広がる略Ｖ字状に配置してもよい。この場合、永久磁石３の配置に対応して、各凹溝部２ｂの壁面部２ｃは、ロータ軸心方向から見て略Ｖ字状をなし、押え部材３１はロータ軸心方向から見て略三角形状をなすようにし、規制部材３２は、押え部材３１の特に３つの角部を支持するようにすればよい。   For example, in the above-described embodiment, the number of permanent magnets 3 provided in each concave groove portion 2b is three. However, the number of permanent magnets 3 is not limited to this. For example, two permanent magnets 3 are arranged in the rotor axial direction. As seen, the gaps may be arranged in a substantially V shape that increases in width toward the outer side in the rotor radial direction. In this case, corresponding to the arrangement of the permanent magnet 3, the wall surface portion 2c of each concave groove portion 2b is substantially V-shaped when viewed from the rotor axial direction, and the pressing member 31 is approximately triangular when viewed from the rotor axial direction. The restriction member 32 may be configured to support the three corners of the pressing member 31.

また、樹脂の充填は必ずしも必要ではなく、例えば圧入や接着等を利用して、永久磁石３及び押え部材３１を各凹溝部２ｂ内に固定することも可能である。 The filling of the tree fat is not always necessary, for example by using a press-fitting, bonding or the like, it is also possible to fix the permanent magnet 3 and the pressing member 31 in the recess groove portion 2b.

上述の実施形態は単なる例示に過ぎず、本発明の範囲を限定的に解釈してはならない。本発明の範囲は請求の範囲によって定義され、請求の範囲の均等範囲に属する変形や変更は、全て本発明の範囲内のものである。   The above-described embodiments are merely examples, and the scope of the present invention should not be interpreted in a limited manner. The scope of the present invention is defined by the scope of the claims, and all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

本発明は、永久磁石が設けられたロータコアを有するロータと、該ロータのロータコアの外周側に配設される、巻線を有するステータとを備えた永久磁石式モータに有用であり、特に、永久磁石式モータを電気自動車やハイブリッド自動車の車両駆動用モータとして用いる場合に有用である。   The present invention is useful for a permanent magnet motor including a rotor having a rotor core provided with permanent magnets and a stator having windings disposed on the outer peripheral side of the rotor core of the rotor. This is useful when a magnetic motor is used as a vehicle driving motor for an electric vehicle or a hybrid vehicle.

Ｍ 永久磁石式モータ
１ ロータ
２ ロータコア
２ｂ 凹溝部
２ｃ 壁面部
３ 永久磁石
１１ ステータ
２１ 巻線
３１ 押え部材
３２ 規制部材
３２ａ 枠状部
３２ｂ 第１支持部
３２ｃ 第２支持部
３２ｄ 第３支持部
３２ｅ 第４支持部
３５ カバー部材 M Permanent magnet motor 1 Rotor 2 Rotor core 2b Concave groove portion 2c Wall surface portion 3 Permanent magnet 11 Stator 21 Winding 31 Pressing member 32 Restricting member
32a frame
32b first support
32c second support part
32d third support
32e 4th support part 35 cover member

Claims (7)

永久磁石が設けられたロータコアを有するロータと、該ロータのロータコアの外周側に配設された、巻線を有するステータとを備えた永久磁石式モータであって、
上記ロータコアの外周面には、ロータ軸心方向に延びる複数の凹溝部が、周方向に間隔をあけて形成されており、
上記各凹溝部内には、
上記永久磁石と、
上記凹溝部内の上記永久磁石を、該凹溝部の壁面部と共に挟持する押え部材と、
上記凹溝部の壁面部に固定された規制部材と、
が配設されており、
上記規制部材は、該規制部材が配設された凹溝部内の押え部材のロータ径方向外側より該押え部材を支持するとともに、上記凹溝部の壁面部と協働して、該押え部材の移動を規制するように構成され、
上記各凹溝部内の永久磁石は、上記押え部材と該凹溝部の壁面部との間で、互いに間隔をあけた状態で複数配設され、
上記各凹溝部内の規制部材は、枠状部と、該枠状部からロータ軸心方向一側に延びかつ上記押え部材を挟むように支持する複数の支持部とを有し、
上記各凹溝部内の上記複数の永久磁石は、上記規制部材の互いに異なる支持部間に固定されていることを特徴とする永久磁石式モータ。 A permanent magnet motor comprising a rotor having a rotor core provided with a permanent magnet, and a stator having a winding disposed on the outer peripheral side of the rotor core of the rotor,
On the outer peripheral surface of the rotor core, a plurality of concave grooves extending in the rotor axial direction are formed at intervals in the circumferential direction,
In each of the concave grooves,
The permanent magnet;
A pressing member for holding the permanent magnet in the concave groove part together with the wall surface part of the concave groove part;
A regulating member fixed to the wall surface of the concave groove,
Is arranged,
The restricting member supports the retainer member from the outer side in the rotor radial direction of the retainer member in the recessed groove portion where the restrictor member is disposed, and moves the retainer member in cooperation with the wall surface portion of the recessed groove portion. Configured to regulate ,
A plurality of permanent magnets in each of the concave groove portions are arranged in a state of being spaced apart from each other between the pressing member and the wall surface portion of the concave groove portion,
The regulating member in each of the concave groove portions has a frame-shaped portion and a plurality of support portions that extend from the frame-shaped portion to one side in the rotor axial direction and support the pressing member therebetween.
The permanent magnet type motor , wherein the plurality of permanent magnets in the concave grooves are fixed between different support portions of the restricting member . 請求項１記載の永久磁石式モータにおいて、
上記ロータは、上記各凹溝部内に上記永久磁石、上記押え部材及び上記規制部材が配設された上記ロータコアを複数有し、
上記複数のロータコアは、ロータ軸心方向に積層され、
上記複数のロータコアにおける各凹溝部の周方向の位置が、該複数のロータコア間で互いに周方向にずれており、
相隣接する任意の２つのロータコアのうちロータ軸心方向一側のロータコアの各凹溝部の周方向の位置が、ロータ軸心方向他側のロータコアの各凹溝部に対して周方向一側に所定角度だけずれていることを特徴とする永久磁石式モータ。 The permanent magnet motor according to claim 1,
The rotor has a plurality of the rotor cores in which the permanent magnets, the pressing member, and the regulating member are disposed in the concave grooves.
The plurality of rotor cores are stacked in the rotor axial direction,
The circumferential position of each concave groove in the plurality of rotor cores is shifted in the circumferential direction between the plurality of rotor cores,
Of any two adjacent rotor cores, the circumferential position of each concave groove portion of the rotor core on one side in the rotor axial direction is predetermined on one circumferential side with respect to each concave groove portion of the rotor core on the other side in the rotor axial direction A permanent magnet motor characterized by being shifted by an angle. 請求項１又は２記載の永久磁石式モータにおいて、
上記押え部材と上記各凹溝部の壁面部との間における上記複数の永久磁石間の、上記支持部が占める空間以外の空間に、樹脂が充填されていることを特徴とする永久磁石式モータ。 The permanent magnet motor according to claim 1 or 2,
A permanent magnet motor characterized in that resin is filled in a space other than the space occupied by the support portion between the plurality of permanent magnets between the pressing member and the wall surface portion of each concave groove portion. 請求項１〜３のいずれか１つに記載の永久磁石式モータにおいて、
上記各凹溝部内に上記永久磁石、上記押え部材及び上記規制部材が配設された上記ロータコアの外周面に、該外周面全周を覆うカバー部材が設けられていることを特徴とする永久磁石式モータ。 The permanent magnet motor according to any one of claims 1 to 3,
A permanent magnet, wherein a cover member is provided on the outer peripheral surface of the rotor core, in which the permanent magnet, the pressing member, and the regulating member are disposed in each of the concave grooves. Motor. 請求項１記載の永久磁石式モータにおいて、上記ロータコアの各凹溝部内に、上記複数の永久磁石、上記押え部材及び上記規制部材が設けられてなるロータ部を製造する、永久磁石式モータのロータ部の製造方法であって、The permanent magnet motor according to claim 1, wherein a rotor portion is manufactured in which the plurality of permanent magnets, the pressing member, and the regulating member are provided in each concave groove portion of the rotor core. Part manufacturing method,
上記ロータコア、上記永久磁石、上記押え部材及び上記規制部材をそれぞれ製造する製造工程と、Manufacturing steps for manufacturing the rotor core, the permanent magnet, the presser member and the regulating member,
上記製造工程の後、上記規制部材の上記複数の支持部間に、上記押え部材を、該規制部材の枠状部の反対側から挿入するとともに、上記複数の永久磁石を、該規制部材の互いに異なる支持部間に挿入する押え部材・永久磁石挿入工程と、After the manufacturing process, the holding member is inserted between the plurality of support portions of the restriction member from the opposite side of the frame-like portion of the restriction member, and the plurality of permanent magnets are connected to each other of the restriction member. Presser member / permanent magnet insertion process for inserting between different support parts;
上記押え部材・永久磁石挿入工程の後、上記規制部材を、上記押え部材及び上記複数の永久磁石を支持した状態で、上記ロータコアの各凹溝部に対してロータ軸心方向一側から挿入する規制部材挿入工程と、After the pressing member / permanent magnet insertion step, the restriction member is inserted from one side in the rotor axial direction into each concave groove portion of the rotor core in a state where the holding member and the plurality of permanent magnets are supported. A member insertion step;
を備えることを特徴とする永久磁石式モータのロータ部の製造方法。A method for manufacturing a rotor part of a permanent magnet motor, comprising: 請求項５記載の永久磁石式モータのロータ部の製造方法において、In the manufacturing method of the rotor part of the permanent magnet type motor according to claim 5,
上記規制部材挿入工程の後、上記押え部材と上記凹溝部の壁面部との間における上記複数の永久磁石間の、上記支持部が占める空間以外の空間に、樹脂を充填して該樹脂を硬化させる樹脂充填硬化工程を更に備えることを特徴とする永久磁石式モータのロータ部の製造方法。After the restricting member insertion step, the resin is filled into a space other than the space occupied by the support portion between the plurality of permanent magnets between the pressing member and the wall surface portion of the concave groove portion, and the resin is cured. A method for producing a rotor part of a permanent magnet motor, further comprising a resin filling and curing step. 請求項５又は６記載の永久磁石式モータのロータ部の製造方法において、In the manufacturing method of the rotor part of the permanent magnet type motor according to claim 5 or 6,
上記規制部材挿入工程を実行する前の２つの上記ロータコアを、順次モータ軸上に周方向に位置決めしながら、該２つのロータコアがロータ軸心方向に積層されかつ該２つのロータコアにおける凹溝部の周方向の位置が該２つのロータコア間で互いに周方向にずれるようにセットするロータコアセット工程を更に備え、While positioning the two rotor cores before executing the restricting member insertion step sequentially on the motor shaft in the circumferential direction, the two rotor cores are stacked in the rotor axial direction, and the circumference of the concave groove portion in the two rotor cores A rotor core setting step for setting the direction position so that the two rotor cores are displaced from each other in the circumferential direction;
上記ロータコアセット工程の後に、上記２つのロータコアのうち一方のロータコアにおける各凹溝部に対して、ロータ軸心方向の他方のロータコアとは反対側から上記規制部材を挿入することで上記規制部材挿入工程を実行するとともに、上記他方のロータコアにおける各凹溝部に対して、ロータ軸心方向の上記一方のロータコアとは反対側から上記規制部材を挿入することで上記規制部材挿入工程を実行することを特徴とする永久磁石式モータのロータ部の製造方法。After the rotor core setting step, the restriction member insertion step by inserting the restriction member from the side opposite to the other rotor core in the rotor axial direction into each concave groove portion in one of the two rotor cores. And the restricting member insertion step is performed by inserting the restricting member from the side opposite to the one rotor core in the rotor axial direction with respect to each concave groove portion in the other rotor core. A method for manufacturing a rotor part of a permanent magnet motor.
JP2011158127A 2011-07-19 2011-07-19 Permanent magnet motor and method for manufacturing rotor part of permanent magnet motor Active JP5772330B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2011158127A JP5772330B2 (en) 2011-07-19 2011-07-19 Permanent magnet motor and method for manufacturing rotor part of permanent magnet motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011158127A JP5772330B2 (en) 2011-07-19 2011-07-19 Permanent magnet motor and method for manufacturing rotor part of permanent magnet motor

Publications (2)

Publication Number Publication Date
JP2013027106A JP2013027106A (en) 2013-02-04
JP5772330B2 true JP5772330B2 (en) 2015-09-02

Family

ID=47784900

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2011158127A Active JP5772330B2 (en) 2011-07-19 2011-07-19 Permanent magnet motor and method for manufacturing rotor part of permanent magnet motor

Country Status (1)

Country Link
JP (1) JP5772330B2 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3397119B2 (en) * 1998-02-24 2003-04-14 国産電機株式会社 Magnet rotor for rotating electric machines
JP3301980B2 (en) * 1998-12-03 2002-07-15 三洋電機株式会社 Centralized winding brushless DC motor
JP2001298886A (en) * 2000-04-14 2001-10-26 Kokusan Denki Co Ltd Flywheel magnet rotor
JP2002078256A (en) * 2000-08-22 2002-03-15 Mitsubishi Electric Corp Permanent magnet type electric rotating machine
JP2011004519A (en) * 2009-06-18 2011-01-06 Toyota Motor Corp Ipm motor rotor and ipm motor

Also Published As

Publication number Publication date
JP2013027106A (en) 2013-02-04

Similar Documents

Publication Publication Date Title
US10879778B2 (en) Rotor of rotating electric machine and manufacturing method of the same
JP6125779B2 (en) Electric motor
JP5663936B2 (en) Permanent magnet rotating electric machine
EP2216883B1 (en) Rotor for a rotating electrical machine
JP5258509B2 (en) Permanent magnet motor rotor
US9735636B2 (en) Rotor and dynamo-electric machine having the same
RU2664505C1 (en) Rotary electric machine
WO2014034344A1 (en) Rotating electric machine
US8937417B2 (en) Rotating electric machine and wind power generation system
US10424982B2 (en) Inner rotor type electric motor
JP2012161226A (en) Rotor for rotary electric machine
WO2011007694A1 (en) Permanent-magnet type synchronous motor
US9024498B2 (en) Rotating electrical machine
US20150295457A1 (en) Rotor and motor
JP2011139617A (en) Rotary electric machine
JP2014155415A (en) Embedded magnet rotor and method of manufacturing embedded magnet rotor
JP6112970B2 (en) Permanent magnet rotating electric machine
JP2011091917A (en) Method of adjusting output of rotating machine and the rotating machine
US10199911B2 (en) Orientation magnetization device and magnet-embedded rotor
JP5772330B2 (en) Permanent magnet motor and method for manufacturing rotor part of permanent magnet motor
JP2011223717A (en) Electromotor and method of manufacturing rotor
JP2015216786A (en) Permanent magnet embedded rotary electric machine
KR101711583B1 (en) Rotor and motor comprising the same
JP2013021892A (en) Manufacturing method of stator of permanent magnet type motor and stator
JP2013021844A (en) Rotary electric machine

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20140326

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20140711

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20150114

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20150127

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20150318

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20150602

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20150615

R150 Certificate of patent or registration of utility model

Ref document number: 5772330

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150