JP2006166635A - Dynamo-electric machine - Google Patents

Dynamo-electric machine Download PDF

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JP2006166635A
JP2006166635A JP2004355859A JP2004355859A JP2006166635A JP 2006166635 A JP2006166635 A JP 2006166635A JP 2004355859 A JP2004355859 A JP 2004355859A JP 2004355859 A JP2004355859 A JP 2004355859A JP 2006166635 A JP2006166635 A JP 2006166635A
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rotor
stator
rotor core
electrical machine
rotating electrical
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Yutaro Kaneko
雄太郎 金子
Masahiro Tsukamoto
雅裕 塚本
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Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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  • Permanent Magnet Type Synchronous Machine (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dynamo-electric machine which is applicable to a synchronous motor, having a rotor core being capable of greatly reducing the iron loss in a rotor and being suitable for retention of a magnet. <P>SOLUTION: In the dynamo-electric machine which has a rotor where a magnet is mounted on a discoid rotor core where a rotating shaft pierces the center of the surface of a board and a stator where stator winding is wound on the stator teeth of the rotor core and the rotor is held rotatably, having an air gap between itself and the stator, the rotor core 15, where a plurality of openings 21a being magnet insertion ports for storing permanent magnets 16 in a superposed body are opened in the superposed face of an electromagnetic steel plate 21, is made by winding the electromagnetic steel plate 21 being a tape-form ferromagnetic substance. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は、回転電機に関し、特に、回転子に永久磁石を装着した構造を有し電動機或いは発電機として用いられる回転電機に関する。   The present invention relates to a rotating electrical machine, and more particularly to a rotating electrical machine having a structure in which a permanent magnet is mounted on a rotor and used as an electric motor or a generator.

従来、回転子に永久磁石を装着した構造を有する回転電機が知られている。このような構造の回転電機は、損失が少なく効率も良く、その上、大きな出力が得られる等の理由により数多く使用されている。その中でも、回転子と固定子をアキシャル方向に配置したアキシャルギャップモータは、薄型化が可能であることから、モータのレイアウトに制限があるような場合に使用されている。例えば、「電動式動力ユニット、電動車両および電動二輪車」（特許文献１参照）では、オートバイの駆動用にアキシャルギャップモータを使用している。   Conventionally, a rotating electrical machine having a structure in which a permanent magnet is mounted on a rotor is known. Many rotating electric machines having such a structure are used for reasons such as low loss and high efficiency, as well as high output. Among them, the axial gap motor in which the rotor and the stator are arranged in the axial direction can be reduced in thickness, and is used when the layout of the motor is limited. For example, in an “electric power unit, electric vehicle, and electric motorcycle” (see Patent Document 1), an axial gap motor is used for driving a motorcycle.

この従来の回転電機の回転子は、例えば鋼板を積層した円盤状の回転子コアに複数の永久磁石を埋設して形成されているが、このような構成を有することにより、高回転時、積層した鋼板に発生する鉄損が大きくなるのが避けられず、効率の悪化をもたらすことになるので、高回転での使用が困難であった。また、その発熱により永久磁石が減磁してしまう虞もある。   The rotor of this conventional rotating electrical machine is formed by embedding a plurality of permanent magnets in a disk-shaped rotor core in which steel plates are stacked, for example, and by having such a configuration, it is It is inevitable that the iron loss generated in the steel sheet is increased, and this leads to deterioration in efficiency, so that it is difficult to use at high speed. Moreover, the permanent magnet may be demagnetized by the heat generation.

そこで、テープ状の金属板を巻回して回転子コアを形成した「モータ」が知られている（特許文献２参照）。図６は、従来のモータの回転子を示す構成斜視図である。図６に示すように、この「モータ」は、テープ状の薄い電磁鋼板１を巻回して回転子コア２を形成し、そこに金属製の回転子導体３を嵌め込んで回転子を形成している。このような構造を有することで、回転子における鉄損を大幅に低減することができる。
特開２００３−２２７７号公報 特開２０００−１０２２２８号公報 Therefore, a “motor” in which a rotor core is formed by winding a tape-shaped metal plate is known (see Patent Document 2). FIG. 6 is a structural perspective view showing a rotor of a conventional motor. As shown in FIG. 6, this "motor" forms a rotor core 2 by winding a thin tape-shaped magnetic steel sheet 1, and a rotor is formed by fitting a metal rotor conductor 3 therein. ing. By having such a structure, the iron loss in the rotor can be greatly reduced.
JP 2003-2277 A JP 2000-102228 A

しかしながら、従来の「モータ」の回転子は、回転子に磁石を持つ同期電動機として適していなかった。即ち、この回転子は、誘導電動機用であって磁石を備えることは想定しておらず、同期電動機に適用しようとしても、溝４は磁石の保持に適した形状ではないため、同期電動機に適用することができなかった。
この発明の目的は、回転子における鉄損を大幅に低減することができると共に、磁石の保持に適した回転子コアを有し同期電動機に適用することができる回転電機を提供することである。 However, the conventional "motor" rotor is not suitable as a synchronous motor having a magnet in the rotor. That is, this rotor is for an induction motor and is not assumed to have a magnet, and even if it is applied to a synchronous motor, the groove 4 is not in a shape suitable for holding a magnet, so it is applied to a synchronous motor. I couldn't.
An object of the present invention is to provide a rotating electrical machine that can significantly reduce iron loss in a rotor and that can be applied to a synchronous motor having a rotor core suitable for holding a magnet.

上記目的を達成するため、この発明に係る回転電機は、盤面中心を回転軸が貫通する円盤状の回転子コアに磁石を装着した回転子と、固定子コアの固定子ティース部に固定子巻線を巻回した固定子とを有し、前記回転子が前記固定子との間にエアギャップをもって回転可能に保持された回転電機において、テープ状の強磁性体を巻回することにより、前記強磁性体の重畳面に、重畳体内部に前記磁石を格納するための磁石挿入口が複数開口する前記回転子コアを形成している。   In order to achieve the above object, a rotating electrical machine according to the present invention includes a rotor in which a magnet is mounted on a disk-shaped rotor core whose rotation axis passes through the center of the disk surface, and a stator winding around a stator tooth portion of the stator core. In a rotating electrical machine having a stator wound with a wire, and the rotor being rotatably held with an air gap between the stator, by winding a tape-shaped ferromagnetic material, The rotor core having a plurality of magnet insertion openings for storing the magnet inside the superposed body is formed on the superposed surface of the ferromagnetic body.

この発明によれば、テープ状の強磁性体を巻回して回転子コアを形成し、その回転子コアには、巻回した強磁性体の重畳面に、重畳体内部に磁石を格納するための磁石挿入口が複数開口しているので、回転子における鉄損を大幅に低減することができると共に、磁石の保持に適した回転子コアを有し同期電動機に適用することができる。   According to the present invention, a rotor core is formed by winding a tape-shaped ferromagnetic material, and a magnet is stored in the rotor core on the overlapping surface of the wound ferromagnetic material. Since a plurality of the magnet insertion openings are opened, the iron loss in the rotor can be greatly reduced, and the rotor core suitable for holding the magnet can be applied to the synchronous motor.

以下、この発明を実施するための最良の形態について図面を参照して説明する。
（第１実施の形態）
図１は、この発明の第１実施の形態に係る回転電機の軸方向断面による概略説明図である。図１に示すように、回転電機１０は、回転子１１、固定子１２、及びケース１３を有しており、回転子１１と固定子１２の各対向面が、回転軸１４の中心軸線方向に対し直交配置されたアキシャルギャップ型構造を有している。 The best mode for carrying out the present invention will be described below with reference to the drawings.
(First embodiment)
FIG. 1 is a schematic explanatory diagram of an axial section of the rotating electrical machine according to the first embodiment of the present invention. As shown in FIG. 1, the rotating electrical machine 10 includes a rotor 11, a stator 12, and a case 13, and the opposing surfaces of the rotor 11 and the stator 12 are in the direction of the central axis of the rotating shaft 14. It has an axial gap type structure arranged orthogonally.

回転子１１は、円盤状の回転子コア１５と、回転子コア１５に装着された複数の永久磁石１６を有しており、回転子コア１５の盤面中心を回転軸１４が貫通している。固定子１２は、強磁性体、例えば圧粉コアからなる固定子コア１７と、各固定子コア１７に巻き付けられた固定子巻線１８を有している。固定子コア１７は、円環状円盤からなるバックコア部１７ａと、バックコア部１７ａの表面に略等間隔互いに離間して突設された複数の固定子ティース部１７ｂからなり、固定子ティース部１７ｂに、絶縁体及び絶縁紙（図示しない）を介して固定子巻線１８が巻回されている。   The rotor 11 includes a disk-shaped rotor core 15 and a plurality of permanent magnets 16 attached to the rotor core 15, and the rotating shaft 14 passes through the center of the surface of the rotor core 15. The stator 12 includes a stator core 17 made of a ferromagnetic material, for example, a dust core, and a stator winding 18 wound around each stator core 17. The stator core 17 includes a back core portion 17a made of an annular disk, and a plurality of stator teeth portions 17b that protrude from the surface of the back core portion 17a at substantially equal intervals. The stator teeth portion 17b Further, a stator winding 18 is wound through an insulator and insulating paper (not shown).

ケース１３は、円筒状の外周ケース１３ａと、外周ケース１３ａの両端開口を塞ぐ一対のサイドケース１３ｂ，１３ｂを有しており、外周ケース１３ａと各サイドケース１３ｂは、例えば、ボルトとナットを用いて締め付け固定されている。一方のサイドケース１３ｂの外側には、回転軸１４の回転状態を検出する回転センサ１９が装着されている。   The case 13 has a cylindrical outer case 13a and a pair of side cases 13b, 13b that closes the openings at both ends of the outer case 13a. The outer case 13a and each side case 13b use, for example, bolts and nuts. Tightened and fixed. A rotation sensor 19 that detects the rotation state of the rotating shaft 14 is attached to the outside of one side case 13b.

回転軸１４は、回転子コア１５の端面と固定子ティース部１７ｂの端面との対向面間にエアギャップ（隙間）ａを有するように、回転子１１を固定子１２に対向配置して、両サイドケース１３ｂ、１３ｂに、ベアリング２０を介して回転自在に保持されている。この回転軸１４を介して回転子１１の回転が外部に伝えられる。   The rotating shaft 14 is configured such that the rotor 11 is disposed opposite to the stator 12 so as to have an air gap (gap) a between the facing surfaces of the end surface of the rotor core 15 and the end surface of the stator teeth portion 17b. The side cases 13 b and 13 b are rotatably held via bearings 20. The rotation of the rotor 11 is transmitted to the outside through the rotating shaft 14.

図２は、図１の回転子コアの形成手順を示し、（ａ）は電磁鋼板を巻回した状態の斜視図、（ｂ）は磁石装着後の封止状態の斜視図である。図２に示すように、回転子コア１５を形成する場合、先ず、薄板の強磁性体、例えば、テープ状の電磁鋼板２１を巻回して重畳させ、テープ面である外周面に開口し盤体内部に永久磁石１６を埋設状態に格納する穴２２を複数個有する、肉厚の円盤体を形成する（ａ）参照）。   2A and 2B show a procedure for forming the rotor core of FIG. 1, in which FIG. 2A is a perspective view of a state in which a magnetic steel sheet is wound, and FIG. 2B is a perspective view of a sealed state after mounting a magnet. As shown in FIG. 2, when the rotor core 15 is formed, first, a thin ferromagnetic body, for example, a tape-shaped electromagnetic steel sheet 21 is wound and overlapped, and the disk body is opened to the outer peripheral surface which is a tape surface. A thick disk body having a plurality of holes 22 for storing the permanent magnets 16 in an embedded state is formed (see (a)).

電磁鋼板２１には、テープ面に、穴２２の開口形状に相当する開口部２１ａが複数個形成されている。各開口部２１ａは、電磁鋼板２１を巻回した際に、開口部２１ａの位置が一致して外周面側から内周面側に連通する穴２２を形成するように、且つ、この穴２２が複数個、それぞれ周方向に略等間隔離間して形成されるように、配置されている。各穴２２には、回転子コア１５の外周面から、磁石挿入口である開口部２１ａから挿入された各永久磁石１６が埋め込まれて格納される。各穴２２に格納された複数の永久磁石１６は、それぞれ周方向に沿って略等間隔互いに離間すると共に、隣り合う同士の磁極が互いに異なって配置される。   A plurality of openings 21 a corresponding to the opening shape of the holes 22 are formed in the electromagnetic steel sheet 21 on the tape surface. Each opening 21a is formed so that when the electromagnetic steel sheet 21 is wound, the position of the opening 21a coincides to form a hole 22 communicating from the outer peripheral surface side to the inner peripheral surface side. A plurality of them are arranged so as to be spaced apart at substantially equal intervals in the circumferential direction. In each hole 22, each permanent magnet 16 inserted from the opening 21a which is a magnet insertion opening is embedded and stored from the outer peripheral surface of the rotor core 15. The plurality of permanent magnets 16 stored in the holes 22 are spaced apart from each other at substantially equal intervals along the circumferential direction, and adjacent magnetic poles are arranged differently.

各永久磁石１６を穴２２に埋め込んだ後、更に、テープ状の電磁鋼板２１の重畳面を覆うようにテープ状の電磁鋼板２３を巻き付けて、永久磁石１６を埋め込んだ穴２２の開口部２１ａを封止する。電磁鋼板２３は、開口部２１ａを形成していない電磁鋼板２１からなり、巻き付けた電磁鋼板２３の端部２３ａは、例えば溶接により或いは接着剤を用いて接合する（（ｂ）参照）。この電磁鋼板２３を回転子コア１５の最外周に装着し穴２２を封止することにより、回転子１１の回転時、永久磁石１６が穴２２から飛び出すのを防ぐことができる。   After each permanent magnet 16 is embedded in the hole 22, the tape-shaped electromagnetic steel plate 23 is further wound so as to cover the overlapping surface of the tape-shaped electromagnetic steel plate 21, and the opening 21 a of the hole 22 in which the permanent magnet 16 is embedded is formed. Seal. The electromagnetic steel plate 23 is composed of the electromagnetic steel plate 21 in which the opening 21a is not formed, and the end 23a of the wound electromagnetic steel plate 23 is joined by, for example, welding or using an adhesive (see (b)). By mounting the electromagnetic steel plate 23 on the outermost periphery of the rotor core 15 and sealing the hole 22, the permanent magnet 16 can be prevented from jumping out of the hole 22 when the rotor 11 is rotated.

上述したように回転子１１と固定子１２を配置することにより、回転子１１は、固定子１２から与えられる回転磁束に対し永久磁石１６が発生させる反力によって、回転軸１４を中心に回転する。ここで、回転子１１と固定子１２の間にはエアギャップａが存在しており、両者が互いに接触することはない。   By arranging the rotor 11 and the stator 12 as described above, the rotor 11 rotates around the rotation shaft 14 by the reaction force generated by the permanent magnet 16 with respect to the rotating magnetic flux applied from the stator 12. . Here, an air gap a exists between the rotor 11 and the stator 12, and they do not contact each other.

このように、回転電機１０は、薄板の強磁性体、例えばテープ状の電磁鋼板２１を巻回することにより、強磁性体の重畳面に、重畳体内部に永久磁石を格納するための挿入口が複数開口する回転子コア１５を形成しているので、回転子コア１５において生じる鉄損を大幅に低減することができ、また、従来の「モータ」の回転子コアに設けられた溝に比べ、より簡易に張力を向上させて巻回することが可能である。この結果、磁石の保持に適した回転子コアを有する磁石式アキシャルギャップモータの回転子を、容易に製作することができ、また、回転子コアの密度を高めて出力・トルクをより増大させることができる。   In this way, the rotating electrical machine 10 has an insertion slot for storing a permanent magnet inside the superposed body on the superposed surface of the ferromagnetic body by winding a thin ferromagnetic body, for example, a tape-shaped electromagnetic steel sheet 21. Since the rotor core 15 having a plurality of openings is formed, iron loss generated in the rotor core 15 can be significantly reduced, and compared with the grooves provided in the rotor core of the conventional “motor”. It is possible to wind with improved tension. As a result, it is possible to easily manufacture a rotor of a magnet type axial gap motor having a rotor core suitable for holding a magnet, and to increase the output and torque by increasing the density of the rotor core. Can do.

（第２実施の形態）
図３は、この発明の第２実施の形態に係る回転子の軸方向断面を周方向に展開した概略説明図である。図３に示すように、回転子３０は、穴２２に代えて溝３１を形成した回転子コア３２を有し、この溝３１に永久磁石３３を装着している。その他の構成及び作用は、回転電機１０と同様である。 (Second Embodiment)
FIG. 3 is a schematic explanatory diagram in which an axial section of a rotor according to a second embodiment of the present invention is developed in the circumferential direction. As shown in FIG. 3, the rotor 30 has a rotor core 32 in which a groove 31 is formed instead of the hole 22, and a permanent magnet 33 is attached to the groove 31. Other configurations and operations are the same as those of the rotating electrical machine 10.

溝３１は、回転子コア３２のエアギャップａに対向する面に開口すると共に、その開口幅が底面幅より狭く形成されており、回転子コア３２の外周面に開けられた挿入口から挿入した永久磁石３３を埋設状態に格納することができる。永久磁石３３は、溝３１に格納することができるように、溝３１の内部形状に合わせた略台形状の縦断面形状を有している。この溝３１は、回転子コア３２の盤体外周縁から盤体中心に向かう放射状に、且つ、周方向に互いに略等間隔離間して、複数個が配置されている。溝３１に格納された永久磁石３３は、隣接同士で方向が互いに逆向きになるように着磁される（図中、矢印参照）。   The groove 31 opens on the surface of the rotor core 32 that faces the air gap a, and the opening width is narrower than the bottom surface width. The groove 31 is inserted from the insertion opening opened on the outer peripheral surface of the rotor core 32. The permanent magnet 33 can be stored in the embedded state. The permanent magnet 33 has a substantially trapezoidal vertical cross-sectional shape that matches the internal shape of the groove 31 so that the permanent magnet 33 can be stored in the groove 31. A plurality of the grooves 31 are arranged radially from the outer peripheral edge of the disk body of the rotor core 32 toward the center of the disk body and spaced apart from each other at substantially equal intervals in the circumferential direction. The permanent magnets 33 housed in the grooves 31 are magnetized so that their directions are opposite to each other (see arrows in the figure).

溝３１を形成する場合、穴２２を形成した開口部２１ａ（図２（ａ）参照）を、テープの一方の側縁を切り欠いた状態に形成する。これにより、電磁鋼板２１を巻回した際に、開口部２１ａの位置が一致して同一位置に重なり、回転子コア３２のエアギャップａに対向する面に開口する溝３１が形成される。   When the groove 31 is formed, the opening 21a (see FIG. 2A) in which the hole 22 is formed is formed in a state where one side edge of the tape is cut away. As a result, when the electromagnetic steel sheet 21 is wound, the position of the opening 21a coincides and overlaps with the same position, and the groove 31 is formed in the surface facing the air gap a of the rotor core 32.

このように、エアギャップａ側に向けた盤体表面に開口部を有する溝３１を形成して、この溝３１に永久磁石３３を埋設したことにより、永久磁石３３の表面を固定子１２に近づけることができるので、永久磁石３３間の磁束の漏れを防止し、出力・トルクをより増大させることができる。加えて、溝３１のエアギャップａ側に向けた盤体表面の開口部を底面幅より狭くしたので、上記効果を得つつ、回転子３０の回転時に溝３１に格納された永久磁石３３の固定子１２側への飛び出しを防止することができる。   As described above, the groove 31 having the opening is formed on the surface of the plate body facing the air gap a, and the permanent magnet 33 is embedded in the groove 31, thereby bringing the surface of the permanent magnet 33 closer to the stator 12. Therefore, leakage of magnetic flux between the permanent magnets 33 can be prevented, and the output and torque can be further increased. In addition, since the opening on the surface of the plate body toward the air gap a side of the groove 31 is made narrower than the bottom surface width, the permanent magnet 33 stored in the groove 31 is fixed when the rotor 30 rotates while obtaining the above effect. Jumping out to the child 12 side can be prevented.

（第３実施の形態）
図４は、この発明の第３実施の形態に係る回転子の軸方向断面による概略説明図である。図４に示すように、回転子３５は、回転子コア３６の外周面に、円環状の枠体３７を装着している。その他の構成及び作用は、回転電機１０と同様である。 (Third embodiment)
FIG. 4 is a schematic explanatory view of an axial section of a rotor according to a third embodiment of the present invention. As shown in FIG. 4, the rotor 35 has an annular frame 37 attached to the outer peripheral surface of the rotor core 36. Other configurations and operations are the same as those of the rotating electrical machine 10.

円環状の枠体３７は、回転子コア３６を形成する電磁鋼板とは別の部材、例えば、断面外形が円形や矩形の管体を円環状に連結して枠状にし、回転子コア３６の外周面に装着した際、外周面に圧着するように形成される。枠体３７を装着した回転子コア３６は、外形形状及び外径が回転子コア１５と略同じになる。このように、回転子コア３６の外周面に圧着する円環状の枠体３７を有することにより、回転子３５の強度を向上させると共に高回転化が可能になる。   The annular frame body 37 is a member different from the electromagnetic steel plate forming the rotor core 36, for example, a circular or rectangular tube having a circular cross-sectional outer shape connected in an annular shape to form a frame shape. When mounted on the outer peripheral surface, it is formed so as to be crimped to the outer peripheral surface. The rotor core 36 to which the frame body 37 is attached has substantially the same outer shape and outer diameter as the rotor core 15. Thus, by having the annular frame body 37 that is crimped to the outer peripheral surface of the rotor core 36, the strength of the rotor 35 can be improved and the rotation speed can be increased.

また、枠体３７を非磁性体により形成することで、回転子コア３６外周部への磁束の漏れを防止することができるので、出力・トルクをより増大させることが可能となる。更に、枠体３７を永久磁石１６又は回転子コア３６よりも軽量な部材により形成することで、遠心力及びイナーシャを低減することができるので、強度をより向上させると共に、より高回転化・高応答化が可能になる。   In addition, since the frame body 37 is formed of a nonmagnetic material, magnetic flux leakage to the outer periphery of the rotor core 36 can be prevented, so that the output / torque can be further increased. Furthermore, since the frame body 37 is formed of a member that is lighter than the permanent magnet 16 or the rotor core 36, centrifugal force and inertia can be reduced, so that the strength is further improved and the rotation speed is increased. Response can be made.

（第４実施の形態）
図５は、この発明の第４実施の形態に係る回転子の軸方向断面を周方向に展開した概略説明図である。図５に示すように、回転子４０は、回転子コア４１に一極当り複数個の永久磁石４２を装着して形成している。その他の構成及び作用は、回転電機１０と同様である。 (Fourth embodiment)
FIG. 5 is a schematic explanatory diagram in which an axial section of a rotor according to a fourth embodiment of the present invention is developed in the circumferential direction. As shown in FIG. 5, the rotor 40 is formed by mounting a plurality of permanent magnets 42 per pole on a rotor core 41. Other configurations and operations are the same as those of the rotating electrical machine 10.

回転子コア４１は、２個の永久磁石４２，４２を埋設状態に格納する２個一組の穴４３ａ，４３ｂを有している。２個一組の穴４３ａ，４３ｂは、格納された２個一組の内の各永久磁石４２の着磁方向（図中、矢印参照）が回転子コア４１の盤面上方、即ち、固定子１２側で交差するように、互いに傾斜するＶ字状に配置されている。つまり、回転子コア４１は、この２個一組の穴４３ａ，４３ｂを穴２２に代えて複数組設けた他は、回転子コア１５と同様の構成を有している。なお、一極当りの永久磁石４２の個数は、２個に限るものではなく、３個或いは４個以上でも良く、これら複数の永久磁石４２は、上述したように着磁方向を傾けたＶ字形状に配置する。   The rotor core 41 has a set of two holes 43a and 43b for storing the two permanent magnets 42 and 42 in an embedded state. The pair of holes 43a and 43b is such that the magnetization direction (see the arrow in the figure) of each permanent magnet 42 in the stored pair is above the surface of the rotor core 41, that is, the stator 12. It arrange | positions at the V shape which mutually inclines so that it may cross | intersect. That is, the rotor core 41 has the same configuration as that of the rotor core 15 except that a plurality of sets of the holes 43 a and 43 b are provided in place of the holes 22. The number of permanent magnets 42 per pole is not limited to two, but may be three or four or more, and the plurality of permanent magnets 42 are V-shaped with the magnetization direction inclined as described above. Arrange in shape.

このように、回転子コア４１に一極当り複数個一組の永久磁石４２を装着することで、リラクタンストルクによる出力・トルクをより増大させることができ、また、使用する永久磁石４２の小型化及び応力の分散化により、回転子４０の強度を向上させると共に高回転化が可能になる。   In this way, by attaching a plurality of sets of permanent magnets 42 per pole to the rotor core 41, the output and torque due to the reluctance torque can be further increased, and the size of the permanent magnets 42 to be used can be reduced. Further, by distributing the stress, the strength of the rotor 40 can be improved and the rotation speed can be increased.

上述したように、この発明によれば、薄板の強磁性体を巻回して回転子コアを形成し、回転子コアに永久磁石を格納する穴或いは溝を設けたことにより、簡易に磁石式アキシャルギャップモータの回転子（ロータ）を製作することが可能になり、また、回転子コアの鉄損を低減することができ、更に、より張力をかけて巻回することで回転子コアの密度が向上するので、出力・トルクをより増大させることが可能である。これにより、回転子における鉄損を大幅に低減することができると共に、磁石の保持に適した回転子コアを有し同期電動機に適用することができる。   As described above, according to the present invention, a rotor core is formed by winding a thin ferromagnetic material, and a hole or groove for storing a permanent magnet is provided in the rotor core, so that a magnet-type axial is easily provided. It becomes possible to manufacture a rotor (rotor) of a gap motor, and iron loss of the rotor core can be reduced, and further, the density of the rotor core can be reduced by winding with more tension. Since it improves, it is possible to increase output and torque more. Thereby, the iron loss in the rotor can be significantly reduced, and the rotor core suitable for holding the magnet can be applied to the synchronous motor.

なお、上記実施の形態において説明した回転電機は、電動機或いは発電機の何れでも良い。また、強磁性体としては、電磁鋼板または一般鋼板に限るものではなく、アモルファス薄板でも良い。また、極数も、特定の数に限定されるものでもない。また、回転子及び固定子の数も、それぞれ１つに限らず、例えば回転子が２つで固定子が１つ、回転子が１つで固定子が２つ、或いは回転子が２つで固定子が２つ等、各々が１個或いは複数個の様々な数の組合せでも良い。   The rotating electrical machine described in the above embodiment may be either an electric motor or a generator. The ferromagnetic material is not limited to an electromagnetic steel plate or a general steel plate, and may be an amorphous thin plate. Further, the number of poles is not limited to a specific number. Also, the number of rotors and stators is not limited to one each, for example, two rotors and one stator, one rotor and two stators, or two rotors. Various combinations such as two stators each having one or a plurality of stators may be used.

この発明の第１実施の形態に係る回転電機の軸方向断面による概略説明図である。It is a schematic explanatory drawing by the axial direction cross section of the rotary electric machine which concerns on 1st Embodiment of this invention. 図１の回転子コアの形成手順を示し、（ａ）は電磁鋼板を巻回した状態の斜視図、（ｂ）は磁石装着後の封止状態の斜視図である。1 shows a procedure for forming the rotor core of FIG. 1, (a) is a perspective view of a state in which a magnetic steel sheet is wound, and (b) is a perspective view of a sealed state after mounting a magnet. この発明の第２実施の形態に係る回転子の軸方向断面を周方向に展開した概略説明図である。It is the schematic explanatory drawing which expand | deployed the axial direction cross section of the rotor which concerns on 2nd Embodiment of this invention to the circumferential direction. この発明の第３実施の形態に係る回転子の軸方向断面による概略説明図である。It is a schematic explanatory drawing by the axial cross section of the rotor which concerns on 3rd Embodiment of this invention. この発明の第４実施の形態に係る回転子の軸方向断面を周方向に展開した概略説明図である。It is the schematic explanatory drawing which expand | deployed the axial direction cross section of the rotor which concerns on 4th Embodiment of this invention to the circumferential direction. 従来のモータの回転子を示す構成斜視図である。It is a structure perspective view which shows the rotor of the conventional motor.

符号の説明Explanation of symbols

１０ 回転電機
１１，３０，３５，４０ 回転子
１２ 固定子
１３ ケース
１３ａ 外周ケース
１３ｂ サイドケース
１４ 回転軸
１５，３２，４１ 回転子コア
１６，３３，４２ 永久磁石
１７ 固定子コア
１７ａ バックコア部
１７ｂ 固定子ティース部
１８ 固定子巻線
１９ 回転センサ
２０ ベアリング
２１，２３ 電磁鋼板
２１ａ 開口部
２２，４３ａ，４３ｂ 穴
２３ａ 端部
３１ 溝
３７ 枠体
ａ エアギャップ DESCRIPTION OF SYMBOLS 10 Rotating electric machine 11, 30, 35, 40 Rotor 12 Stator 13 Case 13a Outer case 13b Side case 14 Rotating shaft 15, 32, 41 Rotor core 16, 33, 42 Permanent magnet 17 Stator core 17a Back core part 17b Stator teeth portion 18 Stator winding 19 Rotation sensor 20 Bearing 21, 23 Electrical steel plate 21a Opening portion 22, 43a, 43b Hole 23a End portion 31 Groove 37 Frame body a Air gap

Claims (8)

盤面中心を回転軸が貫通する円盤状の回転子コアに磁石を装着した回転子と、固定子コアの固定子ティース部に固定子巻線を巻回した固定子とを有し、前記回転子が前記固定子との間にエアギャップをもって回転可能に保持された回転電機において、
テープ状の強磁性体を巻回することにより、前記強磁性体の重畳面に、重畳体内部に前記磁石を格納するための磁石挿入口が複数開口する前記回転子コアを形成した回転電機。 A rotor in which a magnet is mounted on a disk-shaped rotor core having a rotation axis passing through the center of the disk surface, and a stator in which a stator winding is wound around a stator tooth portion of the stator core, and the rotor In a rotating electrical machine that is rotatably held with an air gap between the stator and the stator,
A rotating electrical machine in which the rotor core is formed by winding a plurality of magnet insertion openings for storing the magnet inside the superposed body on the superposed surface of the ferromagnetic body by winding a tape-shaped ferromagnetic body. 前記回転子コアは、
前記磁石挿入口から挿入した前記磁石を埋設状態に格納する穴を複数有する請求項１に記載の回転電機。 The rotor core is
The rotating electrical machine according to claim 1, wherein the rotating electrical machine has a plurality of holes for storing the magnet inserted from the magnet insertion port in an embedded state. 前記回転子コアは、
前記エアギャップに対向する面に開口すると共に開口幅が底面幅より狭い、前記磁石挿入口から挿入した前記磁石を埋設状態に格納する溝を複数有する請求項１に記載の回転電機。 The rotor core is
2. The rotating electrical machine according to claim 1, wherein the rotating electrical machine has a plurality of grooves that are opened in a surface facing the air gap and have an opening width narrower than a bottom surface width and store the magnet inserted from the magnet insertion port in an embedded state. 前記テープ状の強磁性体は、
テープ面に所定間隔で配置され巻回時に同一位置に重なる開口部を有する請求項２または３に記載の回転電機。 The tape-shaped ferromagnetic material is
The rotating electrical machine according to claim 2, wherein the rotating electrical machine has openings that are arranged at predetermined intervals on the tape surface and overlap at the same position when wound. 前記回転子コアは、
前記強磁性体の重畳面を覆って前記磁石挿入口を封止するテープ状の強磁性体を有する請求項１〜４のいずれか一項に記載の回転電機。 The rotor core is
5. The rotating electrical machine according to claim 1, further comprising a tape-shaped ferromagnetic body that covers the overlapping surface of the ferromagnetic body and seals the magnet insertion port. 前記回転子は、
前記回転子コアの外周面に圧着する円環状の枠体を有する請求項１〜５のいずれか一項に記載の回転電機。 The rotor is
The rotating electrical machine according to any one of claims 1 to 5, further comprising an annular frame that is pressure-bonded to an outer peripheral surface of the rotor core. 前記枠体は、非磁性体からなる請求項６に記載の回転電機。   The rotating electrical machine according to claim 6, wherein the frame body is made of a non-magnetic material. 前記磁石は、それぞれの着磁方向が前記固定子側で交差するように互いに傾斜配置された複数個で一つの極を形成する請求項１〜７のいずれか一項に記載の回転電機。   The rotating electric machine according to any one of claims 1 to 7, wherein the magnet forms a single pole with a plurality of magnets that are inclined with respect to each other so that their magnetization directions intersect on the stator side.
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