JP2012044789A - Rotary electric machine and method for manufacturing the same - Google Patents

Rotary electric machine and method for manufacturing the same Download PDF

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JP2012044789A
JP2012044789A JP2010184377A JP2010184377A JP2012044789A JP 2012044789 A JP2012044789 A JP 2012044789A JP 2010184377 A JP2010184377 A JP 2010184377A JP 2010184377 A JP2010184377 A JP 2010184377A JP 2012044789 A JP2012044789 A JP 2012044789A
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rotor core
sub
projection
circumferential direction
rotor
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Kiyomi Inoue
清巳 井上
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Yaskawa Electric Corp
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Yaskawa Electric Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a rotary electric machine with reduced torque ripples and cogging torque.SOLUTION: A rotary electric machine includes: a stator (1); and a rotor (2) that has a rotor core (22) and a plurality of permanent magnets (23) arranged on an outer circumference of the rotor core (22). Between each circumferentially neighboring pair of the permanent magnets (23), a main projection is formed that protrudes outwardly from the outer circumference of the rotor core (22). Each main projection has: a first sub-projection that is formed at an end of the main projection in a first direction along a circumferential direction and that protrudes outwardly from the outer circumference of the rotor core (22); and a second sub-projection that is formed at an end of the main projection in a second direction opposite to the first direction and that protrudes outwardly from the outer circumference of the rotor core (22). The first sub-projections are smaller in circumferential width than the second sub-projections. Each of the first sub-projections is in contact with one of the permanent magnets (23) that is provided on the first direction side thereof, and each of the second sub-projections is in contact with one of the permanent magnets (23) that is provided on the second direction side thereof. Thus, the permanent magnets (23) are fixed to the outer circumference of the rotor core (22).

Description

本発明は、回転電機およびその製造方法に関する。   The present invention relates to a rotating electrical machine and a method for manufacturing the same.

従来、永久磁石を回転子コアの外周面に設けた所謂ＳＰＭ型の回転電機において、永久磁石の固定を容易にする技術が提案されている（例えば、特許文献１参照）。この技術では、回転子コアに、外周側に突出し、周方向に並ぶ主突起部が形成される。永久磁石は、回転子コアの周方向に隣り合う主突起部間に設けられる。主突起部の外周側であって周方向における中心位置には、凹部が形成される。この凹部により、主突起部の周方向両端側に、回転子コアの外周側に突出し、周方向における幅が互いに同一となる副突起部がそれぞれ形成される。この凹部に治具を当て、当該治具を介して回転子コアの外周側から凹部に力を与える。これにより、それぞれが同じ角度で開くように各副突起部を変形させ、永久磁石と当接させる。このようにして、永久磁石の固定を容易にしている。   Conventionally, in a so-called SPM type rotating electrical machine in which a permanent magnet is provided on the outer peripheral surface of a rotor core, a technique for facilitating fixing of the permanent magnet has been proposed (for example, see Patent Document 1). In this technique, main protrusions that protrude to the outer peripheral side and are arranged in the circumferential direction are formed on the rotor core. The permanent magnet is provided between main projections adjacent in the circumferential direction of the rotor core. A recess is formed at the center position in the circumferential direction on the outer peripheral side of the main projection. By the recesses, sub-projections that protrude toward the outer periphery of the rotor core and have the same width in the circumferential direction are formed on both ends in the circumferential direction of the main projection. A jig is applied to the recess, and force is applied to the recess from the outer peripheral side of the rotor core via the jig. Thereby, each sub projection part is deformed so that each opens at the same angle, and is brought into contact with the permanent magnet. In this way, the permanent magnet is easily fixed.

特開２００４−２３９４４号公報（図２）Japanese Patent Laying-Open No. 2004-23944 (FIG. 2)

しかしながら、上記従来技術では、治具の当て方や回転子コアの部材強度のばらつき等によって、いずれか一方の副突起部が大きく変形して開いてしまい、さらには、大きく変形する副突起部も主突起部ごとに異なってしまう場合があった。永久磁石は、大きく変形した副突起部の開いた方向に変位して固定される。よってこの場合、固定時における永久磁石の変位方向が場所によって変わることになり、回転子コアの周方向に隣り合う永久磁石間の間隔のばらつきが大きくなってしまう。その結果、トルクリップルやコギングトルクが増大してしまうという課題があった。   However, in the above prior art, one of the sub-projections is greatly deformed and opened due to variations in the strength of the jig or the rotor core member strength. In some cases, each main projection differs. The permanent magnet is displaced and fixed in the opening direction of the sub-projection portion that is greatly deformed. Therefore, in this case, the displacement direction of the permanent magnet at the time of fixing changes depending on the location, and the variation in the interval between the permanent magnets adjacent in the circumferential direction of the rotor core becomes large. As a result, there is a problem that torque ripple and cogging torque increase.

そこで、本発明は、トルクリップルやコギングトルクを増大を抑えることが可能な回転電機およびその製造方法を提供することを目的とする。   Therefore, an object of the present invention is to provide a rotating electrical machine capable of suppressing an increase in torque ripple and cogging torque and a method for manufacturing the same.

本発明は、上記課題を解決するためになされたものであり、本発明の一の観点に係る回転電機は、固定子と、回転子コアと、当該回転子コアの外周に並べられた複数の永久磁石と、を有し、前記固定子の内側に設けられた回転子と、を備え、前記回転子コアの周方向に隣り合う前記永久磁石間には、前記回転子コアの外周側に突出する主突起部が形成され、各前記主突起部は、前記周方向のうちの第１方向の端側に形成された、前記回転子コアの外周側に突出する第１副突起部と、前記第１方向の反対方向である第２方向の端側に形成された、前記回転子コアの外周側に突出する第２副突起部と、をそれぞれ有し、前記周方向における前記第１副突起部の幅は、前記周方向における前記第２副突起部の幅よりも狭く、前記第１副突起部がその前記第１方向側に設けられた前記永久磁石に当接し、前記第２副突起部がその前記第２方向側に設けられた前記永久磁石に当接することにより、各前記永久磁石が前記回転子コアの外周に固定されるものである。   The present invention has been made to solve the above problems, and a rotating electrical machine according to one aspect of the present invention includes a stator, a rotor core, and a plurality of coils arranged on the outer periphery of the rotor core. A rotor provided on the inner side of the stator, and protruding between the permanent magnets adjacent to each other in the circumferential direction of the rotor core toward the outer peripheral side of the rotor core. Main protrusions are formed, and each of the main protrusions is formed on the end side in the first direction of the circumferential direction, and protrudes toward the outer peripheral side of the rotor core; and Each of the first sub-projections in the circumferential direction, each of the second sub-projections formed on an end side in the second direction opposite to the first direction and projecting to the outer peripheral side of the rotor core. The width of the portion is narrower than the width of the second sub-projection in the circumferential direction, and the first sub-projection is Each of the permanent magnets is brought into contact with the permanent magnet provided on the first direction side, and each of the permanent magnets is brought into contact with the permanent magnet provided on the second direction side. It is fixed to the outer periphery of the core.

本発明の別の観点に係る回転電機の製造方法は、回転子コアおよび複数の永久磁石を有する回転子と、固定子とを備える回転電機の製造方法であって、前記回転子コアには、外周側に突出し、周方向に並んだ主突起部が形成されており、各前記主突起部は、前記周方向のうちの第１方向の端側に形成された、前記回転子コアの外周側に突出する第１副突起部と、前記周方向のうちの第２方向の端側に形成された、前記回転子コアの外周側に突出する第２副突起部と、をそれぞれ有し、前記周方向における前記第１副突起部の幅は、前記周方向における前記第２副突起部の幅よりも狭くなっており、前記周方向に隣り合う前記主突起部間に前記永久磁石を設ける第１工程と、各前記主突起部において、前記第１および第２副突起部間の凹部に前記回転子コアの外周側から力を与えることにより、前記第１および第２副突起部を変形させて前記永久磁石に当接させる第２工程と、を含んでいるものである。   A manufacturing method of a rotating electrical machine according to another aspect of the present invention is a manufacturing method of a rotating electrical machine including a rotor core and a rotor having a plurality of permanent magnets, and a stator, and the rotor core includes: Main protrusions that protrude in the outer peripheral direction and are arranged in the circumferential direction are formed, and each main protrusion is formed on the outer peripheral side of the rotor core that is formed on the end side in the first direction in the circumferential direction. A first sub-projection that protrudes toward the outer periphery of the rotor core, formed on the end side in the second direction of the circumferential direction, and The width of the first sub projection in the circumferential direction is narrower than the width of the second sub projection in the circumferential direction, and the permanent magnet is provided between the main projections adjacent in the circumferential direction. 1 step and in each said main projection part, it is ahead in the recessed part between said 1st and 2nd sub projection parts. By empowering the outer peripheral side of the rotor core, a second step of contact with the permanent magnet by deforming the first and second sub protrusions are those containing a.

本発明によれば、トルクリップルやコギングトルクを低減することが可能な回転電機およびその製造方法を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the rotary electric machine which can reduce a torque ripple and a cogging torque, and its manufacturing method can be provided.

本発明の一実施形態に係る回転電機の構成例を示す図である。It is a figure which shows the structural example of the rotary electric machine which concerns on one Embodiment of this invention. 本発明の一実施形態に係る回転電機の構成例を示す図である。It is a figure which shows the structural example of the rotary electric machine which concerns on one Embodiment of this invention. 本発明の一実施形態に係る回転子の部分拡大図である。It is the elements on larger scale of the rotor which concerns on one Embodiment of this invention. 本発明の一実施形態に係る回転電機の製造方法を説明するための図である。It is a figure for demonstrating the manufacturing method of the rotary electric machine which concerns on one Embodiment of this invention. 本発明の一実施形態に係る回転電機の製造方法を説明するための図である。It is a figure for demonstrating the manufacturing method of the rotary electric machine which concerns on one Embodiment of this invention. 本発明の一実施形態に係る回転電機の製造方法を説明するための図である。It is a figure for demonstrating the manufacturing method of the rotary electric machine which concerns on one Embodiment of this invention.

以下、本発明の実施の形態について図を参照して説明する。なお、同一の構成については同一の符号を付することにより、重複説明を適宜省略する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, about the same structure, the same code | symbol is attached | subjected and duplication description is abbreviate | omitted suitably.

＜実施形態＞
図１および図２を参照して、本発明の一実施形態に係る回転電機の概要構成について説明する。図１および図２は、本発明の一実施形態に係る回転電機の構成例を示す図である。図１は、回転軸Ｏに垂直な方向から回転電機を切断したときの当該回転電機の断面を示した図である。図２は、回転軸Ｏに沿って回転電機を切断したときの当該回転電機の断面を示した図である。なお、本実施形態に係る回転電機は、電動機とする。 <Embodiment>
With reference to FIG. 1 and FIG. 2, the outline | summary structure of the rotary electric machine which concerns on one Embodiment of this invention is demonstrated. 1 and 2 are diagrams showing a configuration example of a rotating electrical machine according to an embodiment of the present invention. FIG. 1 is a view showing a cross section of the rotating electrical machine when the rotating electrical machine is cut from a direction perpendicular to the rotation axis O. FIG. FIG. 2 is a view showing a cross section of the rotating electrical machine when the rotating electrical machine is cut along the rotation axis O. FIG. The rotating electrical machine according to this embodiment is an electric motor.

図１および図２において、回転電機は、固定子１、回転子２、フレーム３、ブラケット４および５、軸受６および７、エンコーダ８、およびエンコーダカバー９を備える。   1 and 2, the rotating electrical machine includes a stator 1, a rotor 2, a frame 3, brackets 4 and 5, bearings 6 and 7, an encoder 8, and an encoder cover 9.

固定子１は、略円筒状であり、空隙を介して略円柱状の回転子２の外周を囲んでいる。固定子１は、固定子コア１１、ボビン１２、およびコイル１３を備える。固定子コア１１には、内周側に突出した複数のティース部１１１が形成される。各ティース部１１１には、ボビン１２に巻回されたコイル１３が設けられる。   The stator 1 has a substantially cylindrical shape, and surrounds the outer periphery of the substantially columnar rotor 2 through a gap. The stator 1 includes a stator core 11, a bobbin 12, and a coil 13. The stator core 11 is formed with a plurality of teeth 111 projecting toward the inner peripheral side. Each tooth part 111 is provided with a coil 13 wound around the bobbin 12.

回転子２は、シャフト２１、回転子コア２２、および永久磁石２３を備える。回転子コア２２は、シャフト２１の外周に設けられ、回転軸Ｏ方向に並べられる。回転子コア２２の外周面上には、周方向に並んだ複数の溝２２１が形成される。各溝２２１は、回転軸Ｏ方向に伸びている。複数の溝２２１の各々には、永久磁石２３が設けられる。この複数の溝２２１により、周方向に隣り合う永久磁石２３間の回転子コア２２には、回転子コア２２の外周側に突出した主突起部２２２が形成される。主突起部２２２の詳細な構造については、後述する。このように構成された回転子２は、コイル１３によって発生する回転磁界により、回転する。   The rotor 2 includes a shaft 21, a rotor core 22, and a permanent magnet 23. The rotor core 22 is provided on the outer periphery of the shaft 21 and arranged in the direction of the rotation axis O. A plurality of grooves 221 arranged in the circumferential direction are formed on the outer peripheral surface of the rotor core 22. Each groove 221 extends in the direction of the rotation axis O. A permanent magnet 23 is provided in each of the plurality of grooves 221. Due to the plurality of grooves 221, a main protrusion 222 protruding to the outer peripheral side of the rotor core 22 is formed on the rotor core 22 between the permanent magnets 23 adjacent in the circumferential direction. The detailed structure of the main protrusion 222 will be described later. The rotor 2 configured as described above is rotated by a rotating magnetic field generated by the coil 13.

フレーム３は、固定子１の外周側に設けられる。ブラケット４は、固定子１および回転子２の回転軸Ｏ方向の一方側（負荷側）に設けられる。ブラケット５は、固定子１および回転子２の回転軸Ｏ方向の他方側（反負荷側）に設けられる。ブラケット４とシャフト２１との間には軸受６が設けられ、ブラケット５とシャフト２１との間には軸受７が設けられ、軸受６および７により、回転子２は回転可能に支持される。図２の例では、シャフト２１の反負荷側にはエンコーダ８が設けられ、ブラケット５の反負荷側にはエンコーダ８を覆うエンコーダカバー９が設けられる。   The frame 3 is provided on the outer peripheral side of the stator 1. The bracket 4 is provided on one side (load side) of the stator 1 and the rotor 2 in the direction of the rotation axis O. The bracket 5 is provided on the other side (the anti-load side) of the stator 1 and the rotor 2 in the direction of the rotation axis O. A bearing 6 is provided between the bracket 4 and the shaft 21, and a bearing 7 is provided between the bracket 5 and the shaft 21, and the rotor 2 is rotatably supported by the bearings 6 and 7. In the example of FIG. 2, the encoder 8 is provided on the opposite side of the shaft 21, and the encoder cover 9 that covers the encoder 8 is provided on the opposite side of the bracket 5.

次に、図３を参照して、主突起部２２２の詳細構成を説明する。図３は、図１に示したＡ部分の部分拡大図であり、永久磁石２３を溝２２１に挿入した直後の様子を示している。図３に示すＸは、回転子コア２２の周方向（回転子２の回転方向でもある）のうちの一方方向を示し、Ｙは、Ｘ方向とは反対の方向を示している。   Next, the detailed configuration of the main protrusion 222 will be described with reference to FIG. FIG. 3 is a partial enlarged view of a portion A shown in FIG. 1 and shows a state immediately after the permanent magnet 23 is inserted into the groove 221. 3 indicates one direction in the circumferential direction of the rotor core 22 (also the rotation direction of the rotor 2), and Y indicates a direction opposite to the X direction.

図３に示すように、周方向における主突起部２２２の幅は、回転子コア２２の外周側に向かうにつれて広くなっている。また、主突起部２２２を間に挟んで周方向に隣り合う永久磁石２２の両端面２３ａおよび２３ｂの間隔は、回転子コア２２の外周側に向かうにつれて広くなっている。主突起部２２２の外周側には、当該外周側が開口する凹部２２２ａが形成される。凹部２２２ａは、円弧状に形成されており、回転軸Ｏ方向に伸びている。この凹部２２２ａにより、主突起部２２２の周方向両端側には、回転子コア２２の外周側に突出した２つの副突起部２２２ｂおよび２２２ｃが形成される。より具体的には、主突起部２２２のＸ方向の端側に副突起部２２２ｂが形成され、主突起部２２２のＹ方向の端側に副突起部２２２ｃが形成される。ここで、凹部２２２ａは、回転子コア２２の周方向における主突起部２２２の中心位置からＸ方向にずれた位置に形成されている。つまり、周方向における凹部２２２ａの中心位置と回転軸Ｏとを通る直線Ｂが、周方向における主突起部２２２の中心位置と回転軸Ｏとを通る直線Ｃに対し、Ｘ方向にずれている。このため、副突起部２２２ｂの周方向幅ｔ１は、副突起部２２２ｃの周方向幅ｔ２よりも狭くなっている。また、全ての主突起部２２２において、凹部２２２ａは、回転子コア２２の周方向における主突起部２２２の中心位置からＸ方向にずれた位置に形成されている。また、回転軸Ｏ方向に並んだ回転子コア２２の各々においても、凹部２２２ａは同一方向（つまりＸ方向）にずれている。   As shown in FIG. 3, the width of the main protrusion 222 in the circumferential direction becomes wider toward the outer peripheral side of the rotor core 22. Further, the distance between the end faces 23 a and 23 b of the permanent magnets 22 that are adjacent in the circumferential direction with the main protrusion 222 interposed therebetween is increased toward the outer peripheral side of the rotor core 22. On the outer peripheral side of the main protrusion 222, a concave portion 222a that opens on the outer peripheral side is formed. The recess 222a is formed in an arc shape and extends in the direction of the rotation axis O. Due to the recess 222 a, two sub-projections 222 b and 222 c that protrude toward the outer periphery of the rotor core 22 are formed on both ends in the circumferential direction of the main protrusion 222. More specifically, the sub projection 222 b is formed on the end side in the X direction of the main projection 222, and the sub projection 222 c is formed on the end side in the Y direction of the main projection 222. Here, the recess 222 a is formed at a position shifted in the X direction from the center position of the main projection 222 in the circumferential direction of the rotor core 22. That is, the straight line B passing through the center position of the concave portion 222a and the rotation axis O in the circumferential direction is shifted in the X direction with respect to the straight line C passing through the center position of the main projection 222 and the rotation axis O in the circumferential direction. For this reason, the circumferential width t1 of the sub protrusion 222b is narrower than the circumferential width t2 of the sub protrusion 222c. In all the main projections 222, the recesses 222 a are formed at positions shifted in the X direction from the center position of the main projections 222 in the circumferential direction of the rotor core 22. Also, in each of the rotor cores 22 arranged in the direction of the rotation axis O, the recess 222a is shifted in the same direction (that is, the X direction).

次に、図４Ａ〜図４Ｃを参照して、本発明の一実施形態に係る回転電機の製造方法について説明する。図４Ａ〜図４Ｃは、本発明の一実施形態に係る回転電機の製造方法を説明するための図である。なおここでは、回転電機の製造方法のうち、回転子の製造方法について詳述する。   Next, with reference to FIGS. 4A to 4C, a method for manufacturing a rotating electrical machine according to an embodiment of the present invention will be described. 4A to 4C are views for explaining a method of manufacturing a rotating electrical machine according to an embodiment of the present invention. In addition, the manufacturing method of a rotor is explained in full detail among the manufacturing methods of a rotary electric machine here.

まず、図４Ａに示すように、永久磁石２３が溝２２１に回転軸Ｏ方向から挿入される。溝２２１の周方向の幅は、永久磁石２３を挿入可能にするため、永久磁石２３の周方向の幅よりも若干広くなっている。このため、図４Ｂに示すように、永久磁石２３を挿入直後には、周方向における永久磁石２３の端面２３ａと主突起部２２２との間、永久磁石２３の端面２３ｂと主突起部２２２との間にそれぞれ隙間が形成される。   First, as shown in FIG. 4A, the permanent magnet 23 is inserted into the groove 221 from the direction of the rotation axis O. The circumferential width of the groove 221 is slightly wider than the circumferential width of the permanent magnet 23 so that the permanent magnet 23 can be inserted. For this reason, as shown in FIG. 4B, immediately after inserting the permanent magnet 23, between the end surface 23a of the permanent magnet 23 and the main projection 222 in the circumferential direction, the end surface 23b of the permanent magnet 23 and the main projection 222 A gap is formed between each of them.

次に、図４Ｂに示すように、治具１００を凹部２２２ａに当て、治具１００を介して回転子コア２２の外周側から凹部２２２ａに力Ｆを与える。これにより、図４Ｃに示すように、副突起部２２２ｂは、Ｘ方向に開くように変形し、永久磁石２３の端面２３ａに当接する。副突起部２２２ｃは、Ｙ方向に開くように変形し、永久磁石２３の端面２３ｂに当接する。これにより、永久磁石２３は、回転子コア２２に固定される。   Next, as shown in FIG. 4B, the jig 100 is applied to the recess 222 a, and a force F is applied to the recess 222 a from the outer peripheral side of the rotor core 22 through the jig 100. As a result, as shown in FIG. 4C, the sub-projection portion 222 b is deformed so as to open in the X direction and abuts against the end surface 23 a of the permanent magnet 23. The sub protrusion 222 c is deformed so as to open in the Y direction, and abuts on the end surface 23 b of the permanent magnet 23. Thereby, the permanent magnet 23 is fixed to the rotor core 22.

ここで、上述したように、副突起部２２２ｂの幅ｔ１は、副突起部２２２ｃの幅ｔ２よりも狭くなっている。このため、図４Ｃに示すように、治具１００の当て方や回転子コア２２の部材強度のばらつき等に関係なく、副突起部２２２ｂを副突起部２２２ｃよりも大きく変形させることができる。これにより、いずれの永久磁石２３もＸ方向に変位させて固定することができる。このように、固定時の永久磁石２３の変位方向をいずれもＸ方向とすることができるため、回転子コア２２の周方向に隣り合う永久磁石２３間の間隔のばらつきを小さくすることができる。その結果、トルクリップルやコギングトルクの増大を抑えることができる。   Here, as described above, the width t1 of the sub-projection portion 222b is narrower than the width t2 of the sub-projection portion 222c. For this reason, as shown in FIG. 4C, the sub-projection portion 222b can be deformed to a greater extent than the sub-projection portion 222c, regardless of how the jig 100 is applied, variation in member strength of the rotor core 22, or the like. Thereby, any permanent magnet 23 can be displaced and fixed in the X direction. Thus, since the displacement direction of the permanent magnet 23 at the time of fixation can be set to the X direction, the variation in the interval between the permanent magnets 23 adjacent to each other in the circumferential direction of the rotor core 22 can be reduced. As a result, an increase in torque ripple and cogging torque can be suppressed.

以上のように、本実施形態では、副突起部２２２ｂの幅ｔ１は、副突起部２２２ｃの幅ｔ２よりも狭くなる。これにより、回転子コア２２の周方向に隣り合う永久磁石２３間の間隔のばらつきを小さくすることができ、トルクリップルやコギングトルクの増大を抑えることができる。   As described above, in the present embodiment, the width t1 of the sub protrusion 222b is smaller than the width t2 of the sub protrusion 222c. Thereby, the dispersion | variation in the space | interval between the permanent magnets 23 adjacent to the circumferential direction of the rotor core 22 can be made small, and the increase in a torque ripple or a cogging torque can be suppressed.

また、本実施形態では、回転軸Ｏ方向に並んだ回転子コア２２においても、凹部２２２ａは同一方向にずれている。これにより、回転軸Ｏ方向に並ぶ永久磁石２３を所定の位置関係で配置する際に、精度良く配置しやすくなる。   In the present embodiment, the recesses 222a are also displaced in the same direction in the rotor cores 22 arranged in the direction of the rotation axis O. Thereby, when the permanent magnets 23 arranged in the direction of the rotation axis O are arranged in a predetermined positional relationship, it becomes easy to arrange them with high accuracy.

また、本実施形態では、周方向における主突起部２２２の幅が回転子コア２２の外周側に向かうにつれて広くなっており、主突起部２２２を間に挟んで周方向に隣り合う永久磁石２２の両端面２３ａおよび２３ｂの間隔も、回転子コア２２の外周側に向かうにつれて広くなっている。これにより、回転子２が回転しているときに永久磁石２３に作用する遠心力によって、永久磁石２３が飛散するのを防ぐことができる。   Further, in the present embodiment, the width of the main projection 222 in the circumferential direction becomes wider toward the outer peripheral side of the rotor core 22, and the permanent magnets 22 adjacent in the circumferential direction with the main projection 222 interposed therebetween. The distance between the end faces 23a and 23b is also increased toward the outer peripheral side of the rotor core 22. Thereby, it is possible to prevent the permanent magnet 23 from being scattered by the centrifugal force acting on the permanent magnet 23 when the rotor 2 is rotating.

以上、本発明の実施形態について説明した。ただし、いわゆる当業者であれば、本発明の趣旨を逸脱しない範囲内で、上記実施形態から適宜変更が可能であり、また、上記実施形態と変更例による手法を適宜組み合わせて利用することも可能である。すなわち、このような変更等が施された技術であっても、本発明の技術的範囲に含まれることは言うまでもない。   The embodiment of the present invention has been described above. However, a so-called person skilled in the art can appropriately modify the above embodiment without departing from the gist of the present invention, and can appropriately combine the above embodiment and the method according to the modified example. It is. That is, it is needless to say that even a technique with such a change is included in the technical scope of the present invention.

例えば、上記実施形態では、回転子コア２２が回転軸Ｏ方向に複数並んでいたが、これに限られない。回転子コア２２は１つであってもよい。   For example, in the above embodiment, a plurality of rotor cores 22 are arranged in the direction of the rotation axis O, but the present invention is not limited to this. There may be one rotor core 22.

また例えば、上記実施形態では、回転電機を電動機としたが、これに限られない。本実施形態に係る回転電機は、発電機であってもよい。この場合、回転子２が回転することで、コイル１３に電圧が誘起する。   Further, for example, in the above embodiment, the rotating electrical machine is an electric motor, but the present invention is not limited to this. The rotating electrical machine according to the present embodiment may be a generator. In this case, a voltage is induced in the coil 13 as the rotor 2 rotates.

また例えば、上記実施形態では、凹部２２２ａの形状は、円弧状としていたが、これに限らない。凹部２２２ａの形状は、Ｕ字状、Ｖ字状などであってもよい。   Further, for example, in the above embodiment, the shape of the concave portion 222a is an arc shape, but is not limited thereto. The shape of the recess 222a may be U-shaped, V-shaped, or the like.

また例えば、上記実施形態では、周方向における主突起部２２２の幅が回転子コア２２の外周側に向かうにつれて広くなっており、主突起部２２２を間に挟んで周方向に隣り合う永久磁石２２の両端面２３ａおよび２３ｂの間隔も、回転子コア２２の外周側に向かうにつれて広くなっているとしたが、これに限られない。例えば、周方向における主突起部２２２の幅が回転子コア２２の径方向において一定であり、主突起部２２２を間に挟んで周方向に隣り合う永久磁石２２の両端面の間隔も、回転子コア２２の径方向において一定であってもよい。この場合、さらに、永久磁石２３の飛散防止のために、周方向に並んだ永久磁石２３の外周を覆う保護カバーを別途設けてもよい。   Further, for example, in the above-described embodiment, the width of the main projection 222 in the circumferential direction becomes wider toward the outer peripheral side of the rotor core 22, and the permanent magnet 22 adjacent in the circumferential direction with the main projection 222 interposed therebetween. The distance between the both end faces 23a and 23b is increased toward the outer peripheral side of the rotor core 22, but is not limited thereto. For example, the width of the main projection 222 in the circumferential direction is constant in the radial direction of the rotor core 22, and the interval between both end faces of the permanent magnets 22 adjacent in the circumferential direction with the main projection 222 interposed therebetween is also the rotor. It may be constant in the radial direction of the core 22. In this case, a protective cover that covers the outer circumference of the permanent magnets 23 arranged in the circumferential direction may be additionally provided to prevent the permanent magnets 23 from scattering.

１ 固定子
２ 回転子
３ フレーム
４、５ ブラケット
６、７ 軸受
８ エンコーダ
９ エンコーダカバー
１１ 固定子コア
１２ ボビン
１３ コイル
１１１ ティース部
２１ シャフト
２２ 回転子コア
２３ 永久磁石
２２１ 溝
２２２ 主突起部
２２２ａ 凹部
２２２ｂ、２２２ｃ 副突起部
１００ 治具 DESCRIPTION OF SYMBOLS 1 Stator 2 Rotor 3 Frame 4, 5 Bracket 6, 7 Bearing 8 Encoder 9 Encoder cover 11 Stator core 12 Bobbin 13 Coil 111 Teeth part 21 Shaft 22 Rotor core 23 Permanent magnet 221 Groove 222 Main projection part 222a Concave part 222b , 222c Sub projection 100 Jig

Claims (4)

固定子と、
回転子コアと、当該回転子コアの外周に並べられた複数の永久磁石と、を有し、前記固定子の内側に設けられた回転子と、を備え、
前記回転子コアの周方向に隣り合う前記永久磁石間には、前記回転子コアの外周側に突出する主突起部が形成され、
各前記主突起部は、
前記周方向のうちの第１方向の端側に形成された、前記回転子コアの外周側に突出する第１副突起部と、
前記第１方向の反対方向である第２方向の端側に形成された、前記回転子コアの外周側に突出する第２副突起部と、をそれぞれ有し、
前記周方向における前記第１副突起部の幅は、前記周方向における前記第２副突起部の幅よりも狭く、
前記第１副突起部がその前記第１方向側に設けられた前記永久磁石に当接し、前記第２副突起部がその前記第２方向側に設けられた前記永久磁石に当接することにより、各前記永久磁石が前記回転子コアの外周に固定される、回転電機。 A stator,
A rotor core, and a plurality of permanent magnets arranged on the outer periphery of the rotor core, the rotor provided inside the stator, and
Between the permanent magnets adjacent to each other in the circumferential direction of the rotor core, a main projection that protrudes to the outer circumferential side of the rotor core is formed,
Each main projection is
A first sub-projection formed on the end side of the first direction in the circumferential direction and projecting to the outer peripheral side of the rotor core;
Each having a second sub-projection formed on an end side in a second direction that is opposite to the first direction and projecting to the outer peripheral side of the rotor core;
The width of the first sub projection in the circumferential direction is narrower than the width of the second sub projection in the circumferential direction,
The first sub projection is in contact with the permanent magnet provided on the first direction side, and the second sub projection is in contact with the permanent magnet provided on the second direction side. A rotating electrical machine in which each of the permanent magnets is fixed to the outer periphery of the rotor core. 前記回転子は、
前記回転子の回転軸方向に並べられた複数の前記回転子コアと、
前記複数の回転子コアの各々の外周に並べられた前記複数の永久磁石と、を有し、
前記複数の回転子コアの各々における前記第１方向は互いに同一方向である、請求項１に記載の回転電機。 The rotor is
A plurality of the rotor cores arranged in the direction of the rotation axis of the rotor;
The plurality of permanent magnets arranged on the outer periphery of each of the plurality of rotor cores,
The rotating electrical machine according to claim 1, wherein the first directions in each of the plurality of rotor cores are the same direction. 前記周方向における前記主突起部の幅は、前記回転子コアの外周側に向かうにつれて広くなっており、
前記主突起部を間に挟んで前記周方向に隣り合う前記永久磁石の両端面の間隔は、前記回転子コアの外周側に向かうにつれて広くなっている、請求項１または２に記載の回転電機。 The width of the main projection in the circumferential direction is wider toward the outer peripheral side of the rotor core,
3. The rotating electrical machine according to claim 1, wherein an interval between both end faces of the permanent magnets adjacent in the circumferential direction with the main protrusion interposed therebetween is increased toward an outer peripheral side of the rotor core. . 回転子コアおよび複数の永久磁石を有する回転子と、固定子とを備える回転電機の製造方法であって、
前記回転子コアには、外周側に突出し、周方向に並んだ主突起部が形成されており、
各前記主突起部は、
前記周方向のうちの第１方向の端側に形成された、前記回転子コアの外周側に突出する第１副突起部と、
前記周方向のうちの第２方向の端側に形成された、前記回転子コアの外周側に突出する第２副突起部と、をそれぞれ有し、
前記周方向における前記第１副突起部の幅は、前記周方向における前記第２副突起部の幅よりも狭くなっており、
前記周方向に隣り合う前記主突起部間に前記永久磁石を設ける第１工程と、
各前記主突起部において、前記第１および第２副突起部間の凹部に前記回転子コアの外周側から力を与えることにより、前記第１および第２副突起部を変形させて前記永久磁石に当接させる第２工程と、を含む、回転電機の製造方法。 A method of manufacturing a rotating electrical machine comprising a rotor having a rotor core and a plurality of permanent magnets, and a stator,
The rotor core is formed with a main protrusion that protrudes on the outer peripheral side and is arranged in the circumferential direction.
Each main projection is
A first sub-projection formed on the end side of the first direction in the circumferential direction and projecting to the outer peripheral side of the rotor core;
Each having a second sub-projection formed on the end side in the second direction of the circumferential direction and projecting to the outer circumferential side of the rotor core,
The width of the first sub projection in the circumferential direction is narrower than the width of the second sub projection in the circumferential direction,
A first step of providing the permanent magnet between the main projections adjacent in the circumferential direction;
In each of the main projections, the first and second sub-projections are deformed by applying a force from the outer peripheral side of the rotor core to the recess between the first and second sub-projections. A method of manufacturing a rotating electrical machine, comprising: a second step of contacting the rotor.
JP2010184377A 2010-08-19 2010-08-19 Rotary electric machine and method for manufacturing the same Pending JP2012044789A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015122842A (en) * 2013-12-20 2015-07-02 ファナック株式会社 Rotor for motor with magnet, motor, and manufacturing method of rotor
JP2017131060A (en) * 2016-01-21 2017-07-27 ファナック株式会社 Rotor for electric motor and manufacturing method for rotor for electric motor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103986252A (en) * 2013-02-07 2014-08-13 博世汽车部件(长沙)有限公司 Motor, and magnetic-tile installation device and magnetic installation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004023944A (en) * 2002-06-19 2004-01-22 Meidensha Corp Magnet fixing method and structure for permanent magnet type rotor
JP2004153913A (en) * 2002-10-30 2004-05-27 Fuji Electric Fa Components & Systems Co Ltd Rotor for permanent magnet motor
JP2006353063A (en) * 2005-06-20 2006-12-28 Yaskawa Electric Corp Permanent magnet type motor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004023944A (en) * 2002-06-19 2004-01-22 Meidensha Corp Magnet fixing method and structure for permanent magnet type rotor
JP2004153913A (en) * 2002-10-30 2004-05-27 Fuji Electric Fa Components & Systems Co Ltd Rotor for permanent magnet motor
JP2006353063A (en) * 2005-06-20 2006-12-28 Yaskawa Electric Corp Permanent magnet type motor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015122842A (en) * 2013-12-20 2015-07-02 ファナック株式会社 Rotor for motor with magnet, motor, and manufacturing method of rotor
US9997967B2 (en) 2013-12-20 2018-06-12 Fanuc Corporation Rotor of electric motor which has magnets, electric motor, and method of production of rotor
JP2017131060A (en) * 2016-01-21 2017-07-27 ファナック株式会社 Rotor for electric motor and manufacturing method for rotor for electric motor
US10439460B2 (en) 2016-01-21 2019-10-08 Fanuc Corporation Rotor of electric motor and its manufacturing method

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