JP2005137117A - Rotor for rotary electric machine - Google Patents

Rotor for rotary electric machine Download PDF

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Publication number
JP2005137117A
JP2005137117A JP2003370321A JP2003370321A JP2005137117A JP 2005137117 A JP2005137117 A JP 2005137117A JP 2003370321 A JP2003370321 A JP 2003370321A JP 2003370321 A JP2003370321 A JP 2003370321A JP 2005137117 A JP2005137117 A JP 2005137117A
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rotor
core
rotating electrical
electrical machine
machine according
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Satoshi Yamashiro
諭 山代
Akira Hashimoto
昭 橋本
Yasuki Kimura
康樹 木村
Manabu Kobayashi
学 小林
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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  • Iron Core Of Rotating Electric Machines (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotor for rotary electric machines that makes it possible to reduce the production cost and enhance the stock utilization. <P>SOLUTION: The rotor 2 for rotary electric machines has a cylindrical rotor core 6 that is placed inside a cylindrical stator 1 with a predetermined gap between it and the circumferential surface of the stator 1, and permanent magnets 7 bonded to the rotor core 6. The rotor core 6 of the rotor 2 comprises a plurality of split cores 60 formed by laminating a plurality of split core pieces that are formed by molding an electromagnetic steel plate and have magnet attachment portions 60a to which the permanent magnets 7 are to be bonded formed in the circumferential direction with a predetermined pitch. A plurality of the split cores 60 are molded in an arc shape, and are formed in a cylindrical shape with the ends of the arcs used as joining portions. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、モータ等の回転電機の回転子に関し、特に、回転子の永久磁石を固定するための回転子コアの構造に関するものである。   The present invention relates to a rotor of a rotating electric machine such as a motor, and more particularly to a structure of a rotor core for fixing a permanent magnet of the rotor.

永久磁石式回転電機は、固定子と、この固定子の中に配置された回転子とを有する。固定子は、円筒形状をなす固定子コアの内周に複数個の巻線を設けて複数個の磁極を形成している。回転子は、固定子の中心を回転軸心として回転できるように配置され、回転軸に固定された円筒状の回転子コアと、この回転子コアの外周面に設けられた永久磁石とを有し、永久磁石はＮ極とＳ極が交互に回転子コアの周方向に並ぶように配置されている。この回転電機では、固定子の巻線に適宜通電し、回転磁界を形成することによって、回転子が回転軸心周りに回転する。   The permanent magnet type rotating electrical machine has a stator and a rotor arranged in the stator. The stator is provided with a plurality of windings on the inner circumference of a cylindrical stator core to form a plurality of magnetic poles. The rotor is arranged so as to be able to rotate with the center of the stator as a rotation axis, and has a cylindrical rotor core fixed to the rotation shaft and a permanent magnet provided on the outer peripheral surface of the rotor core. The permanent magnets are arranged so that N poles and S poles are alternately arranged in the circumferential direction of the rotor core. In this rotating electrical machine, the rotor rotates around the rotation axis by appropriately energizing the windings of the stator to form a rotating magnetic field.

回転子が、回転に伴う遠心力と、固定子の磁界との磁気的相互作用に基づく磁気吸引力との両方を受けた状態で長時間回転する場合にも、永久磁石が回転子コアの表面から剥離しないようにするために、回転子コア表面にくさび形の溝を形成し、溝内に永久磁石を接着剤で貼り付けて固定する構造をとっている（例えば、特許文献１参照）。   Even when the rotor rotates for a long time in a state where both the centrifugal force accompanying the rotation and the magnetic attraction force based on the magnetic interaction with the magnetic field of the stator are received, the permanent magnet remains on the surface of the rotor core. In order to prevent peeling, a wedge-shaped groove is formed on the surface of the rotor core, and a permanent magnet is stuck in the groove with an adhesive and fixed (see, for example, Patent Document 1).

特開平５−１６１２８７号公報（第４頁、図１）JP-A-5-161287 (page 4, FIG. 1)

上記のように、永久磁石が回転子コアの表面から剥離しないようにするために、回転子コアの表面に溝を形成しているが、通常、溝は切削加工により形成しているため、加工に長時間を要し、また、溝形状をくさび形状等、複雑な形状にする加工が困難であるために製作費用が高価になるという問題があった。   As described above, grooves are formed on the surface of the rotor core in order to prevent the permanent magnet from peeling off from the surface of the rotor core. In addition, it takes a long time, and it is difficult to make the groove shape into a complicated shape such as a wedge shape.

また、円柱材料から円筒状の回転子コアを切り出しているために、材料歩留まりが悪く、加工にも長時間を要するとういう問題があった。   In addition, since the cylindrical rotor core is cut out from the columnar material, there is a problem that the material yield is poor and a long time is required for processing.

この発明は、上記のような問題を解決するためのものであり、溝加工を含む回転子コアの加工が容易にでき、製作費用を低減することができるとともに、材料歩留まりをよくすることができる回転電機の回転子を提供するものである。   The present invention is for solving the above-described problems, and can easily process the rotor core including groove processing, reduce the manufacturing cost, and improve the material yield. A rotor of a rotating electric machine is provided.

この発明に係る回転電機の回転子は、円筒状の固定子の内側または外側に、上記固定子の周面と所定のギャップを介して配設された円筒状の回転子コアと、上記回転子コアに固着された永久磁石とを有する回転電機の回転子において、
上記回転子の回転子コアは、電磁鋼板を成形し永久磁石を固着する磁石取付部が周方向に所定ピッチで形成された複数の分割コア片を積層した複数の分割コアからなり、
上記複数の分割コアは、円弧状に成形され、円弧状端部を連結部として円筒状に形成されているものである。 A rotor of a rotating electrical machine according to the present invention includes a cylindrical rotor core disposed inside or outside a cylindrical stator via a peripheral surface of the stator and a predetermined gap, and the rotor In a rotor of a rotating electrical machine having a permanent magnet fixed to a core,
The rotor core of the rotor is composed of a plurality of divided cores obtained by stacking a plurality of divided core pieces formed with a predetermined pitch in the circumferential direction by forming a magnetic steel sheet and fixing a permanent magnet.
The plurality of divided cores are formed in a circular arc shape, and are formed in a cylindrical shape with an arc-shaped end portion as a connecting portion.

この発明に係る回転電機の回転子の上記構成によれば、切削によって円筒状の回転子コア及び回転子コア外周面の磁石取付部を形成する場合に比べて、きわめて容易に短時間で回転子コアを製造することができ、製作費用を低減することができる。   According to the above-described configuration of the rotor of the rotating electrical machine according to the present invention, the rotor is very easily and in a short time compared to the case where the cylindrical rotor core and the magnet mounting portion on the outer peripheral surface of the rotor core are formed by cutting. A core can be manufactured and manufacturing costs can be reduced.

また、電磁鋼板を打ち抜いて分割コア片を形成するので、くさび形の磁石取付部など、複雑な形状を容易に形成することができる。   Moreover, since the electromagnetic steel sheet is punched to form the split core piece, a complicated shape such as a wedge-shaped magnet mounting portion can be easily formed.

また、分割コアを連結して円筒状の回転子コアとするので、電磁鋼板をプレスで打ち抜く際における分割コア片の材料取りを効率よくおこなうことができ、材料歩留まりが向上し、製作費用が低減される。   In addition, since the split cores are connected to form a cylindrical rotor core, the material of the split core pieces can be efficiently removed when punching out electromagnetic steel sheets with a press, improving the material yield and reducing production costs. Is done.

以下、この発明をより詳細に説明するために、この発明を実施するための最良の形態について図面に基づいて説明する。   Hereinafter, in order to describe the present invention in more detail, the best mode for carrying out the present invention will be described with reference to the drawings.

実施の形態１．
図１は、この発明に係る回転電機の実施の形態１を示す断面図、図２は、図１のＡ−Ａ断面の全周を示す断面図、図３は、図１の回転子を示す平面図、図４は、図３の分割コアを示す平面図（ａ）及び正面図（ｂ）、図５は、実施の形態１における別の例を示す断面図、図６は図５の分割コアを複数個連結して円筒状にしたものを示す断面図である。 Embodiment 1 FIG.
1 is a cross-sectional view showing a first embodiment of the rotating electrical machine according to the present invention, FIG. 2 is a cross-sectional view showing the entire circumference of the AA cross section of FIG. 1, and FIG. 3 shows the rotor of FIG. 4 is a plan view (a) and a front view (b) showing the split core of FIG. 3, FIG. 5 is a cross-sectional view showing another example in Embodiment 1, and FIG. 6 is a split view of FIG. It is sectional drawing which shows what connected multiple cores and made it cylindrical.

図１及び図２に示したように、回転電機は、円筒状の固定子コア３を有する固定子１と、固定子１の内周に固定子コア３の内周面と所定のギャップを介して配設された円筒状の回転子コア６を有する回転子２とを備えている。   As shown in FIGS. 1 and 2, the rotating electric machine includes a stator 1 having a cylindrical stator core 3, and an inner periphery of the stator 1 via an inner peripheral surface of the stator core 3 and a predetermined gap. And a rotor 2 having a cylindrical rotor core 6 disposed therein.

また、スロット４が固定子コア３の内周側に形成され、駆動コイル５がスロット４に装着されている。   A slot 4 is formed on the inner peripheral side of the stator core 3, and a drive coil 5 is mounted in the slot 4.

回転子コア６は、軸１０に固定され、軸は軸受けに支持され、回転できるようになっている。また、永久磁石７が回転子コア６の外周面に形成された磁石取付部（溝）６０ａに接着剤で固定され、Ｎ極とＳ極が交互に回転子コア６の周方向に並ぶように配置されている。   The rotor core 6 is fixed to a shaft 10, and the shaft is supported by a bearing so that it can rotate. Further, the permanent magnet 7 is fixed to a magnet mounting portion (groove) 60 a formed on the outer peripheral surface of the rotor core 6 with an adhesive so that the N pole and the S pole are alternately arranged in the circumferential direction of the rotor core 6. Has been placed.

この回転電機では、駆動コイル５に適宜通電し、回転磁界を形成することによって、回転子６が固定子１の中心軸を中心として回転する。   In this rotating electrical machine, the rotor 6 rotates about the central axis of the stator 1 by energizing the drive coil 5 appropriately to form a rotating magnetic field.

図２及び図３に示したように、回転子コア６は、円弧状の分割コア６０を、その端面を連結部６０ｆとして円筒状にすることによって形成される。   As shown in FIGS. 2 and 3, the rotor core 6 is formed by making an arc-shaped split core 60 into a cylindrical shape with the end face as a connecting portion 60 f.

図４（ｂ）に示したように、分割コア６０は、電磁鋼板をプレスで打ち抜いて形成した分割コア片を積層して形成される。また、図４（ａ）に示したように、分割コア片は、円弧状の外周面に磁石取付部６０ａ、磁石取付部６０ａ間に突起６０ｂを有する。   As shown in FIG. 4B, the split core 60 is formed by stacking split core pieces formed by punching out electromagnetic steel sheets with a press. Moreover, as shown to Fig.4 (a), the division | segmentation core piece has the processus | protrusion 60b between the magnet attachment part 60a and the magnet attachment part 60a on the circular-arc-shaped outer peripheral surface.

以上のように、この実施の形態では、外周に磁石取付部（溝）を有する円弧状の分割コア片を電磁鋼板を打ち抜いて形成し、円弧状の分割コア片を積層して分割コア６０を形成し、分割コア６０をその端面を連結部として円筒状の回転子コア６を形成するので、切削によって円筒状の回転子コア及び回転子コア外周面の磁石取付部（溝）を形成する場合に比べて、きわめて容易に短時間で回転子コア６を製造することができ、製作費用を低減することができる。   As described above, in this embodiment, the arc-shaped split core piece having the magnet mounting portion (groove) on the outer periphery is formed by punching the electromagnetic steel sheet, and the arc-shaped split core pieces are stacked to form the split core 60. Since the cylindrical rotor core 6 is formed with the end surface of the split core 60 as a connecting portion, the cylindrical rotor core and the magnet mounting portion (groove) on the outer peripheral surface of the rotor core are formed by cutting. As compared with the above, the rotor core 6 can be manufactured very easily in a short time, and the manufacturing cost can be reduced.

また、電磁鋼板を打ち抜いて分割コア片を形成するので、くさび形の磁石取付部（溝）など、複雑な形状の溝を容易に形成することができる。   Moreover, since the electromagnetic steel sheet is punched to form the split core piece, a complicatedly shaped groove such as a wedge-shaped magnet attachment portion (groove) can be easily formed.

また、分割コア６０を連結して円筒状の回転子コアとするので、電磁鋼板をプレスで打ち抜く際における分割コア片の材料取りを効率よくおこなうことができ、材料歩留まりが向上し、製作費用が低減される。   Further, since the split core 60 is connected to form a cylindrical rotor core, the material of the split core piece can be efficiently taken when punching out the electromagnetic steel sheet with a press, the material yield is improved, and the production cost is reduced. Reduced.

なお、図１及び２に示した回転子２では、永久磁石７を回転子コア６の外周面に設けたが、図５に示したように、永久磁石７を回転子コア６の内部に埋め込むようにしてもよい。この場合には、電磁鋼板から打ち抜く分割コア片における外周の磁石取付部６０ａに代えて、永久磁石７を埋め込む埋め込み穴６０ｇを分割コア片に形成して磁石取付部とし、分割コア片を積層することによって埋め込み穴６０ｇを連結して分割コア６０を形成し、分割コア６０の埋め込み穴６０ｇの中に永久磁石７を挿入し、図６に示したように、分割コア６０を連結部６０ｆで連結して円筒状にすればよい。   In the rotor 2 shown in FIGS. 1 and 2, the permanent magnet 7 is provided on the outer peripheral surface of the rotor core 6. However, as shown in FIG. 5, the permanent magnet 7 is embedded in the rotor core 6. You may do it. In this case, instead of the magnet mounting portion 60a on the outer periphery of the split core piece punched out from the electromagnetic steel sheet, an embedded hole 60g for embedding the permanent magnet 7 is formed in the split core piece as a magnet mounting portion, and the split core pieces are laminated. As a result, the embedded holes 60g are connected to form the split core 60, the permanent magnet 7 is inserted into the embedded hole 60g of the split core 60, and the split core 60 is connected by the connecting portion 60f as shown in FIG. And can be made cylindrical.

実施の形態２．
図７、８、９，１０、１１及び１２は、この発明に係る回転電機の回転子における実施の形態２を示す断面図である。 Embodiment 2. FIG.
7, 8, 9, 10, 11 and 12 are cross-sectional views showing a second embodiment of the rotor of the rotating electrical machine according to the present invention.

上記実施の形態１では、分割コアを円弧状に形成したが、この実施の形態では、図７に示したように、分割コア６０を、永久磁石７を保持する複数のコア部６０ｃと、コア部６０ｃ間を屈曲可能に連結する屈曲部６０ｄと、コア部６０ｃ同士を連結するための凹部と凸部からなる接合部６０ｅとで構成する。   In the first embodiment, the split core is formed in an arc shape. However, in this embodiment, as shown in FIG. 7, the split core 60 includes a plurality of core portions 60 c that hold the permanent magnet 7, and a core. It is comprised by the bending part 60d which connects between the parts 60c so that bending is possible, and the junction part 60e which consists of a recessed part and a convex part for connecting the core parts 60c.

分割コア片は、図７に示したように、継鉄部６０ｃが直線状に配列されるように電磁鋼板をプレスで打ち抜いて形成する。このように、分割コア片を直線状に打ち抜くことによって、材料取りをより効率よく行うことができ、材料歩留まりがより一層向上する。   As shown in FIG. 7, the split core pieces are formed by stamping an electromagnetic steel sheet with a press so that the yoke portions 60 c are arranged in a straight line. Thus, by punching the split core pieces in a straight line, material removal can be performed more efficiently, and the material yield is further improved.

直線状に打ち抜いた分割コア片を積層し、図８に示したように、屈曲部６０ｄで折り曲げて円弧状にし、接合部６０ｅの凹部及び凸部を嵌合してコア部６０ｃ同士を連結して分割コア６０を形成する。このように、接合部６０ｅでコア部６０ｃを連結することによって、コア部６０ｃが相互に径方向にずれるのを防ぐことができる。   Divided core pieces punched out in a straight line are stacked, and as shown in FIG. 8, the bent portions 60d are bent into an arc shape, and the concave portions and convex portions of the joint portion 60e are fitted to connect the core portions 60c to each other. Thus, the split core 60 is formed. Thus, by connecting the core part 60c with the junction part 60e, it can prevent that the core part 60c mutually shifts | deviates to radial direction.

円弧状にした複数の分割コア６０を、図９に示したように、連結部６０ｆで連結して円筒状の回転子コア６を形成する。   As shown in FIG. 9, a plurality of arc-shaped divided cores 60 are connected by a connecting portion 60 f to form a cylindrical rotor core 6.

図７〜９では、永久磁石７をコア部６０ｃの外周表面に設けるようにしたが、図１０〜１２に示したように、永久磁石７をコア部６０ｃ内部に埋め込むようにしてもよい。この場合には、電磁鋼板から打ち抜く分割コア片における外周の磁石取付部６０ａに代えて、永久磁石７を埋め込む埋め込み穴６０ｇを分割コア片に形成し、分割コア片を積層することによって埋め込み穴６０ｇを連結し、連結された埋め込み穴の中に永久磁石７を挿入する（図１０）。その後、屈曲部６０ｄで折り曲げて直線状の分割コア６０を円弧状にし、接合部６０ｅの凹部及び凸部を嵌合してコア部６０ｃ同士が連結された分割コア６０を形成する（図１１）。さらに、複数の分割コア６０を連結して回転子コア６を形成する（図１２）。   7-9, the permanent magnet 7 is provided on the outer peripheral surface of the core portion 60c. However, as shown in FIGS. 10-12, the permanent magnet 7 may be embedded in the core portion 60c. In this case, instead of the outer peripheral magnet mounting portion 60a in the divided core piece punched out from the electromagnetic steel sheet, an embedded hole 60g for embedding the permanent magnet 7 is formed in the divided core piece, and the embedded hole 60g is formed by stacking the divided core pieces. And permanent magnets 7 are inserted into the connected embedded holes (FIG. 10). Thereafter, the linear split core 60 is bent into an arc shape by bending at a bending portion 60d, and the concave portion and the convex portion of the joint portion 60e are fitted to form the split core 60 in which the core portions 60c are connected to each other (FIG. 11). . Further, the rotor core 6 is formed by connecting a plurality of divided cores 60 (FIG. 12).

実施の形態３．
図１３、１４及び１５は、この発明に係る回転電機の回転子における実施の形態３を示す断面図である。 Embodiment 3 FIG.
13, 14 and 15 are sectional views showing Embodiment 3 in the rotor of the rotating electrical machine according to the present invention.

上記実施の形態２では、永久磁石７を各コア部６０ｃの外周部または内部に設けた。この実施の形態では、図１３に示したように、永久磁石７を、その周方向ほぼ中心が屈曲部６０ｄの上に位置するように磁石取付部６０ａを設ける。   In the said Embodiment 2, the permanent magnet 7 was provided in the outer peripheral part or the inside of each core part 60c. In this embodiment, as shown in FIG. 13, the permanent magnet 7 is provided with a magnet attachment portion 60 a so that the center in the circumferential direction is located above the bent portion 60 d.

直線状に打ち抜いた分割コア片を積層し、図１４に示したように、屈曲部６０ｄで折り曲げて円弧状にし、接合部６０ｅの凹部及び凸部を嵌合してコア部６０ｃ同士を連結して分割コア６０を形成する。   As shown in FIG. 14, the split core pieces punched out in a straight line are stacked, bent at a bent portion 60d to form an arc, and the concave portions and convex portions of the joint portion 60e are fitted to connect the core portions 60c to each other. Thus, the split core 60 is formed.

円弧状にした複数の分割コア６０を、図１５に示したように、連結部６０ｆで連結して円筒状の回転子コア６を形成する。   As shown in FIG. 15, a plurality of arc-shaped divided cores 60 are connected by a connecting portion 60 f to form a cylindrical rotor core 6.

このように、永久磁石７を、その周方向ほぼ中心が屈曲部６０ｄの上に位置するように設けることによって、隣接する永久磁石７間で形成される磁路がコア部６０ｃ間の隙間によって妨げられず、安定した磁気特性が得られる。   As described above, by providing the permanent magnet 7 so that its substantially circumferential center is located on the bent portion 60d, the magnetic path formed between the adjacent permanent magnets 7 is hindered by the gap between the core portions 60c. Therefore, stable magnetic characteristics can be obtained.

なお、上記実施の形態１において、分割コア６０の連結部に永久磁石７の周方向ほぼ中央が位置するように、永久磁石７を配置することによって同様の効果が得られる。   In the first embodiment, the same effect can be obtained by arranging the permanent magnet 7 so that the substantially central portion of the permanent magnet 7 in the circumferential direction is positioned at the connecting portion of the split core 60.

実施の形態４．
図１６〜２０は、この発明に係る回転電機の回転子における実施の形態４を示す断面図であり、図１９は、図１６の一部を拡大して示し、図２０は、図１６のＡ−Ａ断面を示している。 Embodiment 4 FIG.
16 to 20 are sectional views showing Embodiment 4 in the rotor of the rotating electrical machine according to the present invention, FIG. 19 is an enlarged view of a part of FIG. 16, and FIG. -A section is shown.

上記実施の形態１ないし３では、永久磁石７を分割コア６０の外周面の磁石取付部６０ａに接着剤で固定する場合を示したが、図１６及び１９に示したように、分割コア６０の磁石取付部６０ａの両端にカシメ部９を設け、図１７に示したように、矢印のようにカシメ部９を折り曲げることにより、接着剤を用いずに永久磁石７を分割コア６０に固定することができる。   In the first to third embodiments, the case where the permanent magnet 7 is fixed to the magnet mounting portion 60a on the outer peripheral surface of the split core 60 with an adhesive is shown. However, as shown in FIGS. The permanent magnet 7 is fixed to the split core 60 without using an adhesive by providing the crimping portions 9 at both ends of the magnet mounting portion 60a and bending the crimping portion 9 as shown by an arrow as shown in FIG. Can do.

また、図１８に示したように、磁石取付部６０ａの両端のカシメ部９をカシメ治具８で同時に折り曲げることによって、永久磁石７の中心を溝６０ａのほぼ中心に配置することができる。   Further, as shown in FIG. 18, the center of the permanent magnet 7 can be arranged substantially at the center of the groove 60a by simultaneously bending the crimping portions 9 at both ends of the magnet mounting portion 60a with the crimping jig 8.

また、カシメ部９を連続したものとせず、図２０に示したように、分割して複数個に分けて設けることによって、カシメ部９からの磁束の漏れを低減することができる。   Further, the leakage of magnetic flux from the crimping portion 9 can be reduced by dividing the crimping portion 9 into a plurality of portions as shown in FIG.

実施の形態５．
図２１は、この発明に係る回転電機の回転子における実施の形態５を示す平面図（ａ）及び側面図（ｂ）である。 Embodiment 5 FIG.
FIG. 21: is the top view (a) and side view (b) which show Embodiment 5 in the rotor of the rotary electric machine which concerns on this invention.

図２１（ｂ）に示したように、この実施の形態では、回転子コア２を分割コア片の積層方向を破線で示す複数段に分割し、隣接する段における分割コア６０の連結部６０ｆを周方向に磁石取付部６０ａ間をピッチとして所定ピッチ（図では１ピッチ）ずらしている。   As shown in FIG. 21 (b), in this embodiment, the rotor core 2 is divided into a plurality of stages indicated by broken lines in the stacking direction of the divided core pieces, and the connecting portions 60f of the divided cores 60 in adjacent stages are provided. The magnet mounting portions 60a are shifted in the circumferential direction by a predetermined pitch (1 pitch in the figure).

このように、隣接する段における分割コア６０の連結部６０ｆを周方向に所定ピッチずらして、永久磁石７を接着剤等で固定することによって、連結部６０ｆを接合することなく、分割コア６０及び各段を固定した回転子コア２が得られる。   In this way, the connecting portions 60f of the split cores 60 in adjacent stages are shifted by a predetermined pitch in the circumferential direction, and the permanent magnet 7 is fixed with an adhesive or the like, so that the split cores 60 and A rotor core 2 with each stage fixed is obtained.

また、各分割コア片の厚み偏差及び分割コア６０の積層方向長さ偏差を吸収し、周方向における回転子コア２の長さを均一化することができる。   Moreover, the thickness deviation of each division | segmentation core piece and the lamination direction length deviation of the division | segmentation core 60 can be absorbed, and the length of the rotor core 2 in the circumferential direction can be equalize | homogenized.

なお、この実施の形態の説明は、上記実施の形態１の分割コアを用いて説明したが、上記実施の形態２の分割コアを用いることができることはいうまでもないことである。   In addition, although description of this embodiment was demonstrated using the split core of the said Embodiment 1, it cannot be overemphasized that the split core of the said Embodiment 2 can be used.

また、上記実施の形態１ないし５は、いわゆる、インナーロータの構造について説明したが、アウターロータの構造にも適用できるものである。   In the first to fifth embodiments, the so-called inner rotor structure has been described. However, the present invention can also be applied to an outer rotor structure.

この発明に係る回転電機の回転子は、工作機械の回転テーブル等の駆動用に用いることができる。   The rotor of the rotating electrical machine according to the present invention can be used for driving a rotary table or the like of a machine tool.

この発明に係る回転電機の実施の形態１を示す断面図である。It is sectional drawing which shows Embodiment 1 of the rotary electric machine which concerns on this invention. 図１のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 図１の回転子を示す平面図である。It is a top view which shows the rotor of FIG. 図３の分割コアを示す平面図（ａ）及び正面図（ｂ）である。It is the top view (a) and front view (b) which show the division | segmentation core of FIG. 実施の形態１における別の例を示す断面図である。6 is a cross-sectional view showing another example in the first embodiment. FIG. 図５の分割コアを複数個連結して円筒状にしたものを示す断面図である。FIG. 6 is a cross-sectional view showing a cylindrical shape obtained by connecting a plurality of divided cores of FIG. 5. この発明に係る回転電機の回転子における実施の形態２を示す断面図である。It is sectional drawing which shows Embodiment 2 in the rotor of the rotary electric machine which concerns on this invention. この発明に係る回転電機の回転子における実施の形態２を示す断面図である。It is sectional drawing which shows Embodiment 2 in the rotor of the rotary electric machine which concerns on this invention. この発明に係る回転電機の回転子における実施の形態２を示す断面図である。It is sectional drawing which shows Embodiment 2 in the rotor of the rotary electric machine which concerns on this invention. この発明に係る回転電機の回転子における実施の形態２を示す断面図である。It is sectional drawing which shows Embodiment 2 in the rotor of the rotary electric machine which concerns on this invention. この発明に係る回転電機の回転子における実施の形態２を示す断面図である。It is sectional drawing which shows Embodiment 2 in the rotor of the rotary electric machine which concerns on this invention. この発明に係る回転電機の回転子における実施の形態２を示す断面図である。It is sectional drawing which shows Embodiment 2 in the rotor of the rotary electric machine which concerns on this invention. この発明に係る回転電機の回転子における実施の形態３を示す断面図である。It is sectional drawing which shows Embodiment 3 in the rotor of the rotary electric machine which concerns on this invention. この発明に係る回転電機の回転子における実施の形態３を示す断面図である。It is sectional drawing which shows Embodiment 3 in the rotor of the rotary electric machine which concerns on this invention. この発明に係る回転電機の回転子における実施の形態３を示す断面図である。It is sectional drawing which shows Embodiment 3 in the rotor of the rotary electric machine which concerns on this invention. この発明に係る回転電機の回転子における実施の形態４を示す断面図である。It is sectional drawing which shows Embodiment 4 in the rotor of the rotary electric machine which concerns on this invention. 実施の形態４におけるカシメ方法を示す断面図である。FIG. 10 is a cross-sectional view showing a caulking method in a fourth embodiment. 実施の形態４におけるカシメ方法を示す断面図である。FIG. 10 is a cross-sectional view showing a caulking method in a fourth embodiment. 図１６の一部を拡大して示す断面図である。It is sectional drawing which expands and shows a part of FIG. 図１６のＡ−Ａ断面を示す断面図である。It is sectional drawing which shows the AA cross section of FIG. この発明に係る回転電機の回転子における実施の形態５を示す平面図（ａ）及び側面図（ｂ）である。It is the top view (a) and side view (b) which show Embodiment 5 in the rotor of the rotary electric machine which concerns on this invention.

符号の説明Explanation of symbols

１ 固定子、２ 回転子、３ 固定子コア、４ スロット、５ 駆動コイル、
６ 固定子コア、７ 永久磁石、８ カシメ治具、９ カシメ部、１０ 回転子軸、
６０ 分割コア、６０ａ 磁石取付部、６０ｂ 突起、６０ｃ コア部、
６０ｄ 屈曲部、６０ｅ 接合部、６０ｆ 連結部、６０ｇ 埋め込み穴。 1 stator, 2 rotors, 3 stator cores, 4 slots, 5 drive coils,
6 stator core, 7 permanent magnet, 8 crimping jig, 9 crimping section, 10 rotor shaft,
60 split cores, 60a magnet mounting part, 60b protrusion, 60c core part,
60d bent part, 60e joint part, 60f connecting part, 60g embedded hole.

Claims (7)

円筒状の固定子の内側または外側に、上記固定子の周面と所定のギャップを介して配設された円筒状の回転子コアと、上記回転子コアに固着された永久磁石とを有する回転電機の回転子において、
上記回転子の回転子コアは、電磁鋼板を成形し永久磁石を固着する磁石取付部が周方向に所定ピッチで形成された複数の分割コア片を積層した複数の分割コアからなり、
上記複数の分割コアは、円弧状に成形され、円弧状端部を連結部として円筒状に形成されていることを特徴とする回転電機の回転子。 A rotation having a cylindrical rotor core disposed inside or outside the cylindrical stator via a predetermined gap and a peripheral surface of the stator, and a permanent magnet fixed to the rotor core In the electric rotor,
The rotor core of the rotor is composed of a plurality of divided cores obtained by stacking a plurality of divided core pieces formed with a predetermined pitch in the circumferential direction by forming a magnetic steel sheet and fixing a permanent magnet.
The rotor of a rotating electrical machine, wherein the plurality of divided cores are formed in an arc shape and are formed in a cylindrical shape with an arc-shaped end portion as a connecting portion. 上記分割コア片は、上記電磁鋼板を円弧状に打ち抜いてなることを特徴とする請求項１記載の回転電機の回転子。 The rotor of a rotating electrical machine according to claim 1, wherein the divided core piece is formed by punching the electromagnetic steel sheet into an arc shape. 上記分割コア片は、複数のコア部を屈曲可能部で連結してなることを特徴とする請求項１記載の回転電機の回転子。 The rotor of a rotating electrical machine according to claim 1, wherein the divided core piece is formed by connecting a plurality of core portions with bendable portions. 上記磁石取付部の周方向ほぼ中心が、上記屈曲可能部に位置していることを特徴とする請求項３記載の回転電機の回転子。 The rotor of the rotating electrical machine according to claim 3, wherein a substantially center in a circumferential direction of the magnet mounting portion is located in the bendable portion. 上記磁石取付部の周方向ほぼ中心が、上記連結部に位置していることを特徴とする請求項１記載の回転電機の回転子。 The rotor of the rotating electrical machine according to claim 1, wherein a substantially center in a circumferential direction of the magnet mounting portion is located in the connecting portion. 上記分割コア片のうちの複数個に、上記永久磁石を上記磁石取付部に固定するためのカシメ部が設けられていることを特徴とする請求項１記載の回転電機の回転子。 The rotor of the rotating electrical machine according to claim 1, wherein a plurality of the split core pieces are provided with a crimping portion for fixing the permanent magnet to the magnet mounting portion. 上記円筒状に形成された分割コアは、積層方向に複数段に分けて積み上げられ、上記連結部が、各段の間で上記所定ピッチの整数倍、周方向にずれていることを特徴とする請求項１記載の回転電機の回転子。 The split cores formed in a cylindrical shape are stacked in a plurality of stages in the stacking direction, and the connecting portion is shifted in the circumferential direction by an integral multiple of the predetermined pitch between the stages. The rotor of the rotary electric machine according to claim 1.
JP2003370321A 2003-10-30 2003-10-30 Rotor for rotary electric machine Pending JP2005137117A (en)

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