JP2005094845A - Rotor of permanent magnet type rotary electric machine - Google Patents

Rotor of permanent magnet type rotary electric machine Download PDF

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JP2005094845A
JP2005094845A JP2003321617A JP2003321617A JP2005094845A JP 2005094845 A JP2005094845 A JP 2005094845A JP 2003321617 A JP2003321617 A JP 2003321617A JP 2003321617 A JP2003321617 A JP 2003321617A JP 2005094845 A JP2005094845 A JP 2005094845A
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permanent magnet
rotor
magnet
magnetic
rotor core
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Masanori Ohashi
正典 大橋
Nobuhiro Mizutani
伸弘 水谷
Masahiko Yamaho
雅彦 山舗
Akito Kondo
明人 近藤
Takao Hirano
恭男 平野
Nobutake Aikura
伸建 相倉
Takashi Araki
貴志 荒木
Masakatsu Matsubara
正克 松原
Sukeyasu Mochizuki
資康 望月
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Toshiba Corp
Toshiba Industrial Products and Systems Corp
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Toshiba Corp
Toshiba Industrial Products Manufacturing Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To prevent the degradation of the performance of a rotary electric machine by suppressing the occurrence of an eddy current on the surface side of a permanent magnet, and by preventing the degradation of the characteristics of the permanent magnet. <P>SOLUTION: The permanent magnet 4 is inserted into fixed to a magnet insert hole 3 of a rotor core 2 which is formed by laminating multiple annular core plates. As for the permanent magnet 4, two unit magnets 4a and 4a, arrayed in axial direction, are coated with resin and then formed like a rod. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、永久磁石式回転電機の回転子に係り、特に永久磁石の改良に関する。   The present invention relates to a rotor of a permanent magnet type rotating electrical machine, and more particularly to improvement of a permanent magnet.

永久磁石式回転電機、例えば永久磁石式リラクタンス型回転電機は、外周部に、磁束が通りやすい磁気的凸部と磁束が通り難い磁気的凹部とが交互に形成され、且つ、永久磁石を有する回転子を備えており、その回転子は、固定子巻線が施された固定子内に配置されている。そして、回転子においては、磁気的凸部では空隙磁束密度が高く、磁気的凹部では空隙磁束密度が低くなって、この磁束密度の変化によってリラクタンストルクが発生し、また、外周部の永久磁石と固定子磁極との間の磁気吸引力および磁気反発力によっても磁気的トルクが発生し、以って回転子が回転する。     A permanent magnet type rotating electrical machine, for example, a permanent magnet type reluctance type rotating electrical machine, has a magnetic convex part on which the magnetic flux easily passes and a magnetic concave part on which the magnetic flux hardly passes on the outer periphery, and has a permanent magnet. The rotor is provided, and the rotor is disposed in a stator provided with a stator winding. In the rotor, the magnetic flux density is high in the magnetic convex portion, and the magnetic flux density is low in the magnetic concave portion, and reluctance torque is generated by the change in the magnetic flux density. Magnetic torque is also generated by the magnetic attractive force and the magnetic repulsive force between the stator magnetic poles, and the rotor rotates.

図１１および図１２は従来の永久磁石式リラクタンス型回転電機の回転子を示すもので、８極の場合である。ここで、図１１は軸方向縦断面図、図１２は図１１のＡ−Ａ線に沿う径方向断面図である。即ち、回転子１００は、円環状の多数の珪素鋼板を積層してなる回転子鉄心１０１を有する。回転子鉄心１０１の外周部には、図１２に示すように、略長方形の一対の磁石挿入孔部１０２，１０２が形成されており、この一対の磁石挿入孔部１０２，１０２に永久磁石１０３，１０３が挿入固定されている。さらに、回転子鉄心１０１の外周部には、図１２に示すように、一対の永久磁石１０３，１０３間に位置して空洞部１０４が形成されており、この空洞部１０４は、略三角形状をなしている。そして、回転子１００において、一対の磁石挿入孔部１０２，１０２および永久磁石１０３,１０３ならびに空洞部１０４が設けられた部分が磁束の通り難い磁気的凹部１０５であり、磁気的凹部１０５，１０５間の部分が磁束の通りやすい磁気的凸部１０６であり、これらの磁気的凹部１０５、磁気的凸部１０６は所定の角度を存して交互に形成されている（例えば特許文献１参照）。
特開２００１−３３９９２２号公報(図１) FIG. 11 and FIG. 12 show a rotor of a conventional permanent magnet type reluctance type rotating electrical machine, which is a case of 8 poles. Here, FIG. 11 is a longitudinal sectional view in the axial direction, and FIG. 12 is a radial sectional view taken along line AA in FIG. That is, the rotor 100 has a rotor core 101 formed by laminating a large number of annular silicon steel plates. As shown in FIG. 12, a pair of substantially rectangular magnet insertion holes 102, 102 are formed on the outer periphery of the rotor core 101, and permanent magnets 103, 102 are formed in the pair of magnet insertion holes 102, 102. 103 is inserted and fixed. Further, as shown in FIG. 12, a cavity 104 is formed between the pair of permanent magnets 103, 103 on the outer periphery of the rotor core 101. The cavity 104 has a substantially triangular shape. There is no. In the rotor 100, a portion where the pair of magnet insertion holes 102 and 102, the permanent magnets 103 and 103, and the cavity 104 are provided is a magnetic recess 105 that is difficult for magnetic flux to pass between the magnetic recesses 105 and 105. The magnetic convex portions 106 where the magnetic flux easily passes are formed, and the magnetic concave portions 105 and the magnetic convex portions 106 are alternately formed at a predetermined angle (see, for example, Patent Document 1).
JP 2001-339922 A (FIG. 1)

永久磁石１０３,１０３は、一般的には腐食防止のために金属によりコーティングが施されているが、この永久磁石の表面側たるコーティングによる金属層が固定子鉄心からの磁束と鎖交する事により渦電流を発生して発熱する。これにより、永久磁石１０３,１０３は、熱により特性が劣化し、結果として、回転電機の性能が低下する不具合がある。
本発明は、上記事情に鑑みてなされたものであり、その目的は、永久磁石の表面側での渦電流の発生を抑制し、永久磁石の温度上昇を防ぐことにより、永久磁石の特性の劣化を防止し、以って、回転電機の特性劣化を防ぐ永久磁石式回転電機の回転子を提供することにある。 The permanent magnets 103 and 103 are generally coated with a metal to prevent corrosion, but the metal layer formed by the coating on the surface side of the permanent magnet interlinks with the magnetic flux from the stator core. Generates eddy current and generates heat. As a result, the permanent magnets 103 and 103 are deteriorated in characteristics by heat, and as a result, the performance of the rotating electrical machine is degraded.
The present invention has been made in view of the above circumstances, and its object is to suppress the generation of eddy currents on the surface side of the permanent magnet and prevent the temperature of the permanent magnet from deteriorating, thereby deteriorating the characteristics of the permanent magnet. Accordingly, it is an object of the present invention to provide a rotor of a permanent magnet type rotating electrical machine that prevents the deterioration of characteristics of the rotating electrical machine.

本発明の永久磁石式回転電機の回転子は、円環状の多数の鉄心板材を積層して形成され、外周部に軸方向に伸びる磁石挿入孔部を有する回転子鉄心と、この回転子鉄心の磁石挿入孔部に挿入固定された永久磁石とを具備し、前記永久磁石は、複数個の単位磁石が軸方向に列を成し、樹脂でコーティングされて棒状に構成されていることを特徴とする。   The rotor of the permanent magnet type rotating electrical machine according to the present invention is formed by laminating a large number of annular core plates, and has a rotor core having a magnet insertion hole extending in the axial direction on the outer periphery, and the rotor core. A permanent magnet inserted and fixed in the magnet insertion hole, wherein the permanent magnet is formed in a rod shape in which a plurality of unit magnets are arranged in an axial direction and coated with a resin. To do.

本発明によれば、永久磁石の表面側の樹脂層が渦電流の発生を抑制して永久磁石の温度上昇を防ぐことにより、永久磁石の特性劣化を防止し、以って、回転電機の性能低下を防ぐことができる。     According to the present invention, the resin layer on the surface side of the permanent magnet suppresses the generation of eddy currents and prevents the temperature of the permanent magnet from rising, thereby preventing the deterioration of the characteristics of the permanent magnet. Decline can be prevented.

以下、本発明を永久磁石式リラクタンス方回転電機に適用した第１の実施例につき図１ないし図４を参照しながら説明する。
回転子１は、円環状の多数の鉄心材たる珪素鋼板を積層してなる回転子鉄心２を有する。
回転子鉄心２の外周部には、外周に向かうに従って対向距離が順次大となる略長方形の一対の磁石挿入孔部３,３が形成されており（従って一対の磁石挿入孔部３，３は、外周からみてハ字形になっている。）、この一対の磁石挿入孔部に永久磁石４，４が挿入固定されている。尚、磁石挿入孔部３，３には磁石位置決めの凸部３ａ，３ａが形成されている。さらに、回転子鉄心２の外周部には、一対の永久磁石４，４間に位置して空洞部５が形成されており、この空洞部５は、一対の永久磁石４，４に平行な二辺部と外周に沿う辺部とを有する略三角形状をなしている。この場合、空洞部５の二辺部は、必ずしも永久磁石４，４に平行でなくてもよい。 Hereinafter, a first embodiment in which the present invention is applied to a permanent magnet type reluctance rotating electric machine will be described with reference to FIGS.
The rotor 1 has a rotor core 2 formed by laminating a large number of annular steel cores.
A pair of substantially rectangular magnet insertion holes 3 and 3 are formed on the outer periphery of the rotor core 2 so that the opposing distances are gradually increased toward the outer periphery (therefore, the pair of magnet insertion holes 3 and 3 are The permanent magnets 4 and 4 are inserted and fixed in the pair of magnet insertion holes. The magnet insertion holes 3 and 3 are provided with magnet positioning projections 3a and 3a. Further, a cavity 5 is formed on the outer peripheral portion of the rotor core 2 so as to be positioned between the pair of permanent magnets 4, 4, and the cavity 5 is arranged in parallel with the pair of permanent magnets 4, 4. It has a substantially triangular shape having side portions and side portions along the outer periphery. In this case, the two sides of the cavity 5 do not necessarily have to be parallel to the permanent magnets 4 and 4.

そして、回転子鉄心２において、一対の磁石挿入孔部３，３および永久磁石４，４ならびに空洞部５が設けられた部分が磁束の通り難い磁気的凹部（ｑ軸）６であり、磁気的凹部６，６間の部分が磁束の通りやすい磁気的凸部（ｄ軸）７であり、これらの磁気的凹部６、磁気的凸部７は所定の角度を存して交互に形成されている。
ここで、磁石挿入孔部３に挿入された永久磁石４は、軸方向に複数個たる２個の単位磁石４ａ，４ａを並べこれらを樹脂コーティングして樹脂層４ｂによって覆うことにより棒状に形成したものである。 In the rotor core 2, a portion where the pair of magnet insertion holes 3, 3, the permanent magnets 4, 4 and the cavity 5 are provided is a magnetic recess (q axis) 6 in which magnetic flux is difficult to pass. A portion between the concave portions 6 and 6 is a magnetic convex portion (d-axis) 7 in which magnetic flux easily passes. These magnetic concave portions 6 and magnetic convex portions 7 are alternately formed with a predetermined angle. .
Here, the permanent magnet 4 inserted into the magnet insertion hole 3 is formed in a rod shape by arranging two unit magnets 4a and 4a in the axial direction and coating them with a resin layer 4b. Is.

そして、前記永久磁石４は、磁石挿入孔部３に圧入することで位置決めされる。この場合、２個の単位磁石４ａ，４ａは、樹脂層４ｂにより棒状の一つの永久磁石４として扱われる。
なお、回転子鉄心２の両端部には円環状を成す端板８および９（図１参照）が配置されている。そして、回転軸１０と回転子鉄心２、端板８および９とは、焼きばめにより一体化されて組み立てられる。この場合、図１に示すように、回転子鉄心２のキー１１，１２（端板８，９も含む）は回転軸のキー溝１３（一方のみ図示）に合致するようになっている。なお、回転軸１０には、回転子鉄心２、端板８および９の位置決め用の鍔部１４が形成されている。 The permanent magnet 4 is positioned by press-fitting into the magnet insertion hole 3. In this case, the two unit magnets 4a and 4a are handled as a single rod-like permanent magnet 4 by the resin layer 4b.
In addition, annular end plates 8 and 9 (see FIG. 1) are arranged at both ends of the rotor core 2. And the rotating shaft 10, the rotor core 2, and the end plates 8 and 9 are integrated and assembled by shrink fitting. In this case, as shown in FIG. 1, the keys 11 and 12 (including the end plates 8 and 9) of the rotor core 2 are aligned with the key groove 13 (only one is shown) of the rotating shaft. The rotating shaft 10 is formed with a flange 14 for positioning the rotor core 2 and the end plates 8 and 9.

しかして、回転子１は、固定子巻線が施された図示しない固定子内に配置されるようになっている。回転子１には、磁束が通り難い磁気的凹部（ｑ軸）６と磁束が通り易い磁気凸部（ｄ軸）７とが形成されているので、これらの磁気的凹部６及び磁気的凸部７上の空隙部分で、固定子巻線に電流を流すことにより蓄えられる磁気的エネルギーが異なり、この磁気エネルギーの変化によりリラクタンストルクが発生する。また、回転子１は、永久磁石４，４が設けられているので、永久磁石４，４と固定子磁極との間の磁気吸引及び磁気反発力によってもトルクが発生する。これにより回転子１が回転するようになる。   Thus, the rotor 1 is arranged in a stator (not shown) provided with a stator winding. The rotor 1 is formed with a magnetic recess (q-axis) 6 in which the magnetic flux is difficult to pass and a magnetic convex portion (d-axis) 7 in which the magnetic flux easily passes. 7, the magnetic energy stored by passing a current through the stator winding is different, and reluctance torque is generated by the change in the magnetic energy. Further, since the rotor 1 is provided with the permanent magnets 4, 4, torque is also generated by magnetic attraction and magnetic repulsion between the permanent magnets 4, 4 and the stator magnetic poles. Thereby, the rotor 1 comes to rotate.

このような構成によれば、永久磁石４の樹脂層４ｂにより永久磁石４表面側の渦電流の発生を抑制し、しかも、永久磁石４旗に磁石４ａ，４ａ、に分割されていることから、単位磁石４ａ自体の渦電流の発生をも抑制し、永久磁石４の温度上昇を抑えることで、永久磁石４の特性の劣化を防止し、以って回転電機の特性劣化を防ぐことができる。
また、永久磁石４は、樹脂層４ａによりコーティングされている為、回転子鉄心２に単位磁石４ａが直接触れることなく磁石挿入孔部３に圧入することができ、接着材料および接着行程の省略が可能となる。 According to such a configuration, the generation of eddy currents on the surface side of the permanent magnet 4 is suppressed by the resin layer 4b of the permanent magnet 4, and the permanent magnet 4 flag is divided into the magnets 4a and 4a. By suppressing the generation of eddy currents in the unit magnet 4a itself and suppressing the temperature rise of the permanent magnet 4, it is possible to prevent the deterioration of the characteristics of the permanent magnet 4 and thus the deterioration of the characteristics of the rotating electrical machine.
Further, since the permanent magnet 4 is coated with the resin layer 4a, the unit magnet 4a can be press-fitted into the magnet insertion hole 3 without directly touching the rotor core 2, and the adhesive material and the bonding process can be omitted. It becomes possible.

図５は、本発明の第２の実施例を示すもので、第１の実施例と異なるところを説明する。永久磁石１５は、永久磁石４に代わるもので、３個の単位磁石１５ａを樹脂コーティングして樹脂層１５ｂにより覆い、一つの棒状に形成されている。
このような構成によれば、第１の実施例と同様の効果が得られ、さらに単位磁石１５ａ自体の渦電流の発生を第１実施例よりも抑えることができる。 FIG. 5 shows a second embodiment of the present invention, and the differences from the first embodiment will be described. The permanent magnet 15 is an alternative to the permanent magnet 4, and is formed in one bar shape by covering the three unit magnets 15a with a resin layer 15b.
According to such a configuration, the same effect as in the first embodiment can be obtained, and furthermore, the generation of eddy currents in the unit magnet 15a itself can be suppressed as compared with the first embodiment.

図６は、本発明の第３の実施例を示すもので、第１の実施例と異なるところを説明する。永久磁石１６は、永久磁石４に代わるもので、４個の単位磁石１６ａを樹脂コーティングして樹脂層１６ｂにより覆い、一つの棒状に形成されている。
このような構成によれば、第２の実施例より、単位磁石１６ａ自体の渦電流の発生を抑えることができる。 FIG. 6 shows a third embodiment of the present invention, and the differences from the first embodiment will be described. The permanent magnet 16 is a substitute for the permanent magnet 4 and is formed into one rod shape by coating four unit magnets 16a with a resin layer 16b.
According to such a structure, generation | occurrence | production of the eddy current of unit magnet 16a itself can be suppressed from the 2nd Example.

図７は、本発明の第４の実施例を示すもので、第１の実施例と異なるところを説明する。永久磁石１７は、永久磁石４に代わるもので、５個の単位磁石１７ａを樹脂コーティングして樹脂層１７ｂにより覆い、一つの棒状に形成されている。
このような構成によれば、第３の実施例より、単位磁石１７ａ自体の渦電流の発生を抑えることができる。 FIG. 7 shows a fourth embodiment of the present invention, and the differences from the first embodiment will be described. The permanent magnet 17 is an alternative to the permanent magnet 4 and is formed in one rod shape by covering the five unit magnets 17a with a resin layer 17b.
According to such a structure, generation | occurrence | production of the eddy current of unit magnet 17a itself can be suppressed from the 3rd Example.

図８は、本発明の第５の実施例を示すもので、第１の実施例と異なるところを説明する。永久磁石１８は、永久磁石４に代わるもので、６個の単位磁石１８ａを樹脂コーティングして樹脂層１８ｂにより覆い、一つの棒状に形成されている。
このような構成によれば、第４の実施例より、単位磁石１８ａ自体の渦電流の発生を抑えることができる。 FIG. 8 shows a fifth embodiment of the present invention, and the differences from the first embodiment will be described. The permanent magnet 18 is an alternative to the permanent magnet 4, and is formed in one rod shape by covering the six unit magnets 18a with resin coating 18b.
According to such a structure, generation | occurrence | production of the eddy current of unit magnet 18a itself can be suppressed from the 4th Example.

図９は、本発明の第６の実施例を示すもので、第１の実施例と異なるところを説明する。永久磁石１９は、永久磁石４に代わるもので、８個の単位磁石１９ａを樹脂によりコーティングして樹脂層１９ｂにより覆い、一つの棒状に形成されている。
このような構成によれば、第５の実施例より、単位磁石１９ａ自体の渦電流の発生を抑えることができる。 FIG. 9 shows a sixth embodiment of the present invention, and the differences from the first embodiment will be described. The permanent magnet 19 is a substitute for the permanent magnet 4, and is formed in one rod shape by coating eight unit magnets 19a with resin and covering them with a resin layer 19b.
According to such a structure, generation | occurrence | production of the eddy current of unit magnet 19a itself can be suppressed from the 5th Example.

そして、図１０は、本発明の第７の実施例を示すもので、第１の実施例と異なるところを説明する。永久磁石２０は、永久磁石４に代わるもので、複数個（例えば、２，３，４，５，６或いは８個）の単位磁石２０ａを樹脂コーティングして樹脂層２０ｂにより覆い、一つの棒状に形成されている。そして、樹脂層２０ｂは、磁石挿入孔部３と同一形状に形成されて、その磁石挿入孔部３に圧入固定されている。   FIG. 10 shows a seventh embodiment of the present invention, and the differences from the first embodiment will be described. The permanent magnet 20 is an alternative to the permanent magnet 4, and a plurality of (for example, 2, 3, 4, 5, 6 or 8) unit magnets 20a are coated with a resin and covered with a resin layer 20b to form a single rod. Is formed. The resin layer 20 b is formed in the same shape as the magnet insertion hole 3 and is press-fitted and fixed in the magnet insertion hole 3.

このような構成によれば、第１のおよび第６実施例の効果に加えて、さらに永久磁石１３の安定性が増し、永久磁石１３の支持部の信頼性を向上させることができる。
なお、本発明は、上記かつ図面に示す実施例にのみ限定されるものではなく、
次のような拡張が可能である。
上記実施例においては、永久磁石式リラクタンス型回転電機の回転子に適用した例としているが、回転子に永久磁石を利用した回転電機全般に適用可能である。 According to such a configuration, in addition to the effects of the first and sixth embodiments, the stability of the permanent magnet 13 can be further increased, and the reliability of the support portion of the permanent magnet 13 can be improved.
In addition, this invention is not limited only to the Example shown above and shown in drawing,
The following expansion is possible.
In the said Example, although it was set as the example applied to the rotor of the permanent magnet type | mold reluctance type rotary electric machine, it is applicable to the rotary electric machine whole using the permanent magnet for the rotor.

単位磁石数は、各実施例の個数に限定されない。   The number of unit magnets is not limited to the number of each embodiment.

本発明の第１の実施例を示す回転子の軸方向断面図Sectional view of the rotor in the axial direction showing the first embodiment of the present invention 図１のＢ−Ｂ線に沿う断面図Sectional drawing which follows the BB line of FIG. 回転子の部分拡大断面図Partial enlarged sectional view of the rotor 永久磁石の拡大斜視図Enlarged perspective view of permanent magnet 本発明の第２の実施例を示す永久磁石の断面図Sectional drawing of the permanent magnet which shows the 2nd Example of this invention 本発明の第３の実施例を示す永久磁石の断面図Sectional drawing of the permanent magnet which shows the 3rd Example of this invention 本発明の第４の実施例を示す永久磁石の断面図Sectional drawing of the permanent magnet which shows the 4th Example of this invention 本発明の第５の実施例を示す永久磁石の断面図Sectional drawing of the permanent magnet which shows the 5th Example of this invention 本発明の第６の実施例を示す永久磁石の断面図Sectional drawing of the permanent magnet which shows the 6th Example of this invention 本発明の第７の実施例を示す回転子の部分拡大図Partial enlarged view of a rotor showing a seventh embodiment of the present invention 従来例を示す回転子の軸方向断面図Axial sectional view of a rotor showing a conventional example 図１１のＡ−Ａ線に断面図Sectional view along line AA in FIG.

符号の説明Explanation of symbols

図面中、１は回転子、２は回転子鉄心、３は磁石挿入孔部、３ａは凸部、４，１５，１６，１７，１８，１９及び２０は永久磁石、４ａ，１５ａ，１６ａ，１７ａ，１８ａ，１９ａ及び２０ａは単位磁石、４ｂ，１５ｂ，１６ｂ，１７ｂ，１８ｂ，１９ｂ及び２０ｂは樹脂層、５は空洞部、６は磁気的凹部、７は磁気的凸部、８及び９は端板、１０は回転軸、１１，１２はキー、１３はキー溝、１４は鍔部を示す。

In the drawings, 1 is a rotor, 2 is a rotor core, 3 is a magnet insertion hole, 3a is a convex portion, 4, 15, 16, 17, 18, 19 and 20 are permanent magnets, 4a, 15a, 16a and 17a. , 18a, 19a and 20a are unit magnets, 4b, 15b, 16b, 17b, 18b, 19b and 20b are resin layers, 5 is a cavity, 6 is a magnetic recess, 7 is a magnetic projection, and 8 and 9 are ends. Plates 10, 10 are rotating shafts, 11 and 12 are keys, 13 is a keyway, and 14 is a collar.

Claims (2)

円環状の多数の鉄心板材を積層して形成され、外周部に軸方向に伸びる磁石挿入孔部を有する回転子鉄心と、
この回転子鉄心の磁石挿入孔部に挿入固定された永久磁石とを具備し、
前記永久磁石は、複数個の単位磁石が軸方向に列を成し、樹脂でコーティングされて棒状に構成されていることを特徴とする永久磁石式回転電機の回転子。 A rotor core that is formed by laminating a large number of annular core plates and has a magnet insertion hole extending in the axial direction on the outer periphery,
A permanent magnet inserted and fixed in the magnet insertion hole of the rotor core;
The permanent magnet is a rotor of a permanent magnet type rotating electrical machine, wherein a plurality of unit magnets are arranged in a row in the axial direction and coated with a resin to form a rod shape. 外周部に磁気的凹凸部が交互に形成された円環状の多数の鉄心板材を積層して形成され、外周部に軸方向に伸びる磁石挿入孔部を有する回転子鉄心と、
この回転子鉄心の磁石挿入孔部に挿入固定された永久磁石とを具備し、
前記永久磁石は、複数個の単位磁石が軸方向に列を成し、樹脂コーティングされて棒状に構成されていることを特徴とする永久磁石式回転電機の回転子。

A rotor core having a magnet insertion hole extending in the axial direction on the outer peripheral portion, formed by laminating a large number of annular core plates in which magnetic irregularities are alternately formed on the outer peripheral portion;
A permanent magnet inserted and fixed in the magnet insertion hole of the rotor core;
The permanent magnet is a rotor of a permanent magnet type rotating electrical machine, wherein a plurality of unit magnets are arranged in a row in the axial direction and are coated with a resin to form a rod shape.

JP2003321617A 2003-09-12 2003-09-12 Rotor of permanent magnet type rotary electric machine Pending JP2005094845A (en)

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