JP2019213264A - Surface permanent magnet type rotor of rotary electric machine - Google Patents

Surface permanent magnet type rotor of rotary electric machine Download PDF

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JP2019213264A
JP2019213264A JP2018104710A JP2018104710A JP2019213264A JP 2019213264 A JP2019213264 A JP 2019213264A JP 2018104710 A JP2018104710 A JP 2018104710A JP 2018104710 A JP2018104710 A JP 2018104710A JP 2019213264 A JP2019213264 A JP 2019213264A
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permanent magnet
electrical machine
rotating electrical
rotor
type rotor
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JP7043979B2 (en
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小倉　和也
Kazuya Ogura
和也 小倉
準也 松野
Junya Matsuno
準也 松野
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Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
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Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
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Abstract

To provide a surface permanent magnet type rotor of a rotary electric machine in which oxidation degradation of a holding ring which is made from a fiber-reinforced resin can be significantly suppressed.SOLUTION: In a surface permanent magnet type rotor 10 of a rotary electric machine, a plurality of permanent magnets 13 are disposed on an outer circumferential surface of a core part 12, and a plurality of holding rings 14 each made from a fiber-reinforced resin are fitted so as to press the permanent magnets, whereby the permanent magnets 13 are fixed to the core part 12 with the holding rings 14. A protective coating 15 made from a polymer material is provided to cover end surfaces of the holding rings 14.SELECTED DRAWING: Figure 2

Description

本発明は、電動機や発電機等の回転電機の表面永久磁石型ロータに関する。   The present invention relates to a surface permanent magnet rotor of a rotating electrical machine such as an electric motor or a generator.

コア部の外周面に複数の永久磁石を布設した表面永久磁石（ＳＰＭ）型ロータを利用した電動機や発電機等の回転電機においては、ロータが高速度で回転すると、永久磁石が遠心力により外れてしまうおそれがあるため、当該永久磁石をコア部の外周面に押え付けるように繊維強化樹脂（ＦＲＰ）からなる保持リングを複数嵌合することにより、当該永久磁石をコア部に保持リングで固定するようにしている。   In a rotating electrical machine such as an electric motor or a generator using a surface permanent magnet (SPM) rotor in which a plurality of permanent magnets are laid on the outer peripheral surface of the core portion, when the rotor rotates at a high speed, the permanent magnet comes off due to centrifugal force. The permanent magnet is fixed to the core portion with the retaining ring by fitting a plurality of retaining rings made of fiber reinforced resin (FRP) so as to press the permanent magnet against the outer peripheral surface of the core portion. Like to do.

特開２００１−０８６６７７号公報JP 2001-086677 A 特開２００２−０３４２１６号公報JP 2002-034216 A 特開２０１７−１９５６９５号公報JP 2017-195695 A

前述したような回転電機のＳＰＭ型ロータにおいては、ＦＲＰからなるパイプを径方向に沿って切断して作製した保持リングを利用していることから、保持リングの端面に繊維と樹脂との界面が露出してしまっている。このため、保持リングは、外部露出する前記界面から内部に空気が侵入し易く、内部に侵入した空気中の酸素によって樹脂が酸化して強度低下を引き起こしてしまうおそれがあった。   In the SPM type rotor of the rotating electric machine as described above, since the holding ring produced by cutting the pipe made of FRP along the radial direction is used, the interface between the fiber and the resin is formed on the end face of the holding ring. It has been exposed. For this reason, in the retaining ring, air easily enters the inside from the interface exposed to the outside, and there is a possibility that the resin is oxidized by oxygen in the air that has entered the inside and the strength is reduced.

このようなことから、本発明は、保持リングの酸化劣化を大きく抑制することができる回転電機のＳＰＭ型ロータを提供することを目的とする。   In view of the above, an object of the present invention is to provide an SPM rotor of a rotating electrical machine that can largely suppress oxidation deterioration of a retaining ring.

前述した課題を解決するための、本発明に係る回転電機の表面永久磁石型ロータは、コア部の外周面に複数の永久磁石を布設して、当該永久磁石を当該コア部の外周面に押え付けるように繊維強化樹脂からなる保持リングを複数嵌合することにより、当該永久磁石を当該コア部に当該保持リングで固定した回転電機の表面永久磁石型ロータにおいて、前記保持リングの端面を覆う高分子材料からなる保護体が設けられていることを特徴とする。   In order to solve the above-described problems, the surface permanent magnet type rotor of the rotating electrical machine according to the present invention has a plurality of permanent magnets laid on the outer peripheral surface of the core portion, and holds the permanent magnets on the outer peripheral surface of the core portion. In the surface permanent magnet type rotor of a rotating electrical machine in which the permanent magnet is fixed to the core portion by the holding ring by fitting a plurality of holding rings made of fiber reinforced resin so as to be attached, a high height that covers the end surface of the holding ring A protective body made of a molecular material is provided.

また、本発明に係る回転電機の表面永久磁石型ロータは、前述した回転電機の表面永久磁石型ロータにおいて、前記保護体が、前記保持リングの外周面及び端面を被覆する保護層であることを特徴とする。   Further, the surface permanent magnet type rotor of the rotating electrical machine according to the present invention is the surface permanent magnet type rotor of the rotating electrical machine described above, wherein the protective body is a protective layer covering the outer peripheral surface and the end surface of the holding ring. Features.

また、本発明に係る回転電機の表面永久磁石型ロータは、前述した回転電機の表面永久磁石型ロータにおいて、前記保護体が、前記コア部の軸方向で隣り合う前記保持リングの間及び当該軸方向両端側に位置する前記保持リングの軸方向外側に位置するように前記コアの前記永久磁石上にそれぞれ嵌合して当該保持リングの端面を塞ぐ複数の保護リングであることを特徴とする。   Further, the surface permanent magnet type rotor of the rotating electrical machine according to the present invention is the surface permanent magnet type rotor of the rotating electrical machine described above, wherein the protector is disposed between the holding rings adjacent in the axial direction of the core portion and the shaft. A plurality of protective rings are fitted on the permanent magnet of the core so as to be positioned on the outer side in the axial direction of the holding ring located at both ends of the holding ring and block the end faces of the holding ring.

また、本発明に係る回転電機の表面永久磁石型ロータは、前述した回転電機の表面永久磁石型ロータにおいて、前記保護体が、前記高分子材料よりも高い熱伝導性を有する材料からなる充填材を含有するものであることを特徴とする。   Further, the surface permanent magnet type rotor of the rotating electrical machine according to the present invention is the above-mentioned surface permanent magnet type rotor of the rotating electrical machine, wherein the protective body is made of a material having higher thermal conductivity than the polymer material. It is characterized by containing.

本発明に係る回転電機の表面永久磁石型ロータによれば、保持リングの端面が保護体で覆われることから、保持リングの端面に位置する繊維と樹脂との界面が外部へ露出することを防止できるので、保持リングの外部露出する上記界面から保持リングの内部へ空気が侵入してしまうことを防止できる。その結果、保持リングの酸化劣化を大きく抑制することができ、保持リングの強度低下を大きく抑制することができる。   According to the surface permanent magnet type rotor of the rotating electrical machine according to the present invention, since the end face of the holding ring is covered with the protective body, the interface between the fiber and the resin located on the end face of the holding ring is prevented from being exposed to the outside. Therefore, air can be prevented from entering the inside of the holding ring from the interface exposed to the outside of the holding ring. As a result, the oxidative deterioration of the retaining ring can be greatly suppressed, and the strength reduction of the retaining ring can be largely suppressed.

本発明に係る回転電機の表面永久磁石型ロータの第一番目の実施形態の概略構成図である。It is a schematic block diagram of 1st embodiment of the surface permanent magnet type rotor of the rotary electric machine which concerns on this invention. 図１の断面図である。It is sectional drawing of FIG. 本発明に係る回転電機の表面永久磁石型ロータの第二番目の実施形態の概略構成図である。It is a schematic block diagram of 2nd embodiment of the surface permanent magnet type rotor of the rotary electric machine which concerns on this invention. 図３の断面図である。FIG. 4 is a cross-sectional view of FIG. 3. 本発明に係る回転電機の表面永久磁石型ロータの他の実施形態の概略構成図である。It is a schematic block diagram of other embodiment of the surface permanent magnet type rotor of the rotary electric machine which concerns on this invention. 図５の断面図である。It is sectional drawing of FIG.

本発明に係る回転電機の表面永久磁石（ＳＰＭ）型ロータの実施形態を図面に基づいて説明するが、本発明は、図面に基づいて説明する以下の実施形態のみに限定されるものではない。   Embodiments of a surface permanent magnet (SPM) rotor of a rotating electrical machine according to the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments described with reference to the drawings.

〈第一番目の実施形態〉
本発明に係る回転電機のＳＰＭ型ロータの第一番目の実施形態を図１，２に基づいて説明する。 <First embodiment>
A first embodiment of an SPM rotor of a rotating electrical machine according to the present invention will be described with reference to FIGS.

図１，２に示すように、円柱形状をなす軸部１１の外周上の長手方向中央部分には、円筒形状をなすコア部１２が同軸をなして設けられている。コア部１２の外周面上には、円弧形状をなす永久磁石（ＰＭ）１３が当該コア部１２の長手方向中央部分全体を覆うように当該コア部１２の周方向及び軸方向に亘って複数布設されている。コア部１２の周方向に並設された永久磁石１３上には、繊維強化樹脂（ＦＲＰ）からなる環状をなす保持リング１４が、当該コア部１２の軸方向に並設された永久磁石１３ごとに当該コア部１２と同軸をなしてそれぞれ嵌合している。   As shown in FIGS. 1 and 2, a cylindrical core portion 12 is coaxially provided at a central portion in the longitudinal direction on the outer periphery of the cylindrical shaft portion 11. A plurality of permanent magnets (PM) 13 having an arc shape are provided on the outer peripheral surface of the core portion 12 so as to cover the entire central portion in the longitudinal direction of the core portion 12 in the circumferential direction and the axial direction of the core portion 12. Has been. On the permanent magnets 13 arranged in parallel in the circumferential direction of the core portion 12, an annular holding ring 14 made of fiber reinforced resin (FRP) is provided together with the permanent magnets 13 arranged in parallel in the axial direction of the core portion 12. Are fitted coaxially with the core portion 12.

図１，２に示すように、永久磁石１３上の保持リング１４は、高分子材料であるエポキシ等の樹脂からなる保護体である保護層の保護コート１５で外周面及び端面が被覆されている。このような保護コート１５は、コア部１２に永久磁石１３を貼り付けて保持リング１４を嵌合させてから、粘性を有する液状の前記樹脂を保持リング１４上から塗布して炉内等で硬化させることにより、容易に設けることができる。   As shown in FIGS. 1 and 2, the retaining ring 14 on the permanent magnet 13 is covered with an outer peripheral surface and an end surface with a protective coat 15 of a protective layer which is a protective body made of a resin such as epoxy which is a polymer material. . Such a protective coat 15 is formed by attaching the permanent magnet 13 to the core portion 12 and fitting the holding ring 14, and then applying the viscous liquid resin from the holding ring 14 and curing it in the furnace or the like. By making it, it can provide easily.

このようにして保護コート１５を設けた本実施形態に係るロータ１０においては、保持リング１４の端面及び外周面が保護コート１５でコーティングされていることから、保持リング１４の端面に位置する繊維と樹脂との界面が外部へ露出することを防止できる。   In the rotor 10 according to this embodiment provided with the protective coat 15 in this way, since the end surface and the outer peripheral surface of the holding ring 14 are coated with the protective coat 15, the fibers positioned on the end surface of the holding ring 14 It is possible to prevent the interface with the resin from being exposed to the outside.

このため、本実施形態に係るロータ１０では、保持リング１４の外部露出する前記界面から保持リング１４の内部への空気の侵入を防止することができる。   For this reason, in the rotor 10 according to the present embodiment, air can be prevented from entering the holding ring 14 from the interface exposed to the outside of the holding ring 14.

したがって、本実施形態に係るロータ１０によれば、保持リング１４の樹脂の酸化劣化を大きく抑制することができるので、保持リング１４の強度低下を大きく抑制することができる。   Therefore, according to the rotor 10 according to the present embodiment, since the oxidative deterioration of the resin of the holding ring 14 can be largely suppressed, a decrease in strength of the holding ring 14 can be largely suppressed.

〈第二番目の実施形態〉
本発明に係る回転電機のＳＰＭ型ロータの第二番目の実施形態を図３，４に基づいて説明する。ただし、前述した実施形態と同様な部分については、前述した実施形態で用いた符号と同様な符号を用いることにより、前述した実施形態での説明と重複する説明を省略する。 <Second Embodiment>
A second embodiment of the SPM rotor of the rotating electrical machine according to the present invention will be described with reference to FIGS. However, with respect to the same parts as those of the above-described embodiment, the same reference numerals as those used in the above-described embodiment are used, and the description overlapping with the description of the above-described embodiment is omitted.

図３，４に示すように、前記永久磁石１３上の、前記コア部１２の軸方向で隣り合う保持リング１４の間及び当該軸方向で両端側に位置する保持リング１４の軸方向外側には、エポキシ等の樹脂やフッ素ゴム等のゴムのような高分子材料からなる保護体である複数の保護リング２５が当該保持リング１４の端面を塞ぐようにしてそれぞれ嵌合している。   As shown in FIGS. 3 and 4, on the permanent magnet 13, between the holding rings 14 adjacent in the axial direction of the core portion 12 and on the outer side in the axial direction of the holding rings 14 positioned on both ends in the axial direction. A plurality of protective rings 25 which are protective bodies made of a polymer material such as a resin such as epoxy or rubber such as fluorine rubber are fitted to each other so as to close the end face of the holding ring 14.

つまり、前述した実施形態においては、コア部１２に永久磁石１３を貼り付けて保持リング１４を嵌合した後に、粘性を有する液状の前記樹脂を保持リング１４上から塗布して炉内等で硬化させることにより、保持リング１４の外周面及び端面を保護コート１５で覆うようにしたが、本実施形態においては、コア部１２に永久磁石１３を貼り付けた後に、保持リング１４と保護リング２５とを交互に嵌合することにより、保持リング１４の端面を保護リング２５で覆うようにしたのである。   That is, in the above-described embodiment, after the permanent magnet 13 is attached to the core portion 12 and the holding ring 14 is fitted, the viscous liquid resin is applied from the holding ring 14 and cured in a furnace or the like. By doing so, the outer peripheral surface and the end surface of the holding ring 14 are covered with the protective coat 15. However, in this embodiment, after the permanent magnet 13 is attached to the core portion 12, the holding ring 14, the protective ring 25, By alternately fitting, the end face of the holding ring 14 is covered with the protective ring 25.

このため、本実施形態に係るロータ２０においては、保持リング１４の端面が保護リング２５で塞がれていることから、前述した実施形態に係るロータ１０の場合と同様に、保持リング１４の端面に位置する繊維と樹脂との界面が外部へ露出することを防止でき、保持リング１４の外部露出する前記界面から保持リング１４の内部へ空気が侵入することを防止できる。   For this reason, in the rotor 20 according to the present embodiment, the end face of the holding ring 14 is closed by the protective ring 25, so that the end face of the holding ring 14 is the same as in the case of the rotor 10 according to the above-described embodiment. It is possible to prevent the interface between the fiber and the resin located at the outside from being exposed to the outside, and to prevent air from entering the inside of the holding ring 14 from the interface exposed from the outside of the holding ring 14.

したがって、本実施形態に係るロータ２０によれば、前述した実施形態の場合と同様に、保持リング１４の樹脂の酸化劣化を大きく抑制することができるので、保持リング１４の強度低下を大きく抑制することができる。   Therefore, according to the rotor 20 according to the present embodiment, the oxidative deterioration of the resin of the retaining ring 14 can be largely suppressed as in the case of the above-described embodiment, and thus the strength reduction of the retaining ring 14 is largely suppressed. be able to.

また、前述した実施形態に係るロータ１０のような、前記樹脂の炉内での硬化や粘度による膜厚制御等の作業を不要にすることができる。   In addition, work such as curing of the resin in the furnace and film thickness control by viscosity, such as the rotor 10 according to the above-described embodiment, can be made unnecessary.

〈他の実施形態〉
なお、前述した第一番目の実施形態においては、粘性を有する液状の前記樹脂を保持リング１４上から塗布して炉内等で硬化させることにより、保持リング１４の外周面及び端面を保護コート１５で覆うようにしたが、他の実施形態として、前記保護コート１５に代えて、例えば、図５，６に示すように、水酸化アルミニウムやアルミナや窒化ホウ素等のように樹脂よりも高い熱伝導性を有する材料からなる充填材を含有する樹脂を前記保持リング１４の外周面及び端面にライニングすることにより、当該保持リング１４の外周面及び端面を保護体である保護層の保護ライナ３５で被覆したロータ３０とすれば、前述した第一番目の実施形態の保護コート１５よりも熱伝導性を高めることができるので、前述した第一番目の実施形態のロータ１０よりも放熱性能を高めることができ、非常に好ましい。 <Other embodiments>
In the first embodiment described above, the liquid resin having viscosity is applied from above the retaining ring 14 and cured in a furnace or the like, whereby the outer peripheral surface and the end surface of the retaining ring 14 are protected. In another embodiment, instead of the protective coat 15, for example, as shown in FIGS. 5 and 6, heat conduction higher than that of resin such as aluminum hydroxide, alumina, boron nitride or the like is used. A resin containing a filler made of a material having a property is lined on the outer peripheral surface and the end surface of the holding ring 14, so that the outer peripheral surface and the end surface of the holding ring 14 are covered with a protective liner 35 of a protective layer as a protector. If the rotor 30 is used, the thermal conductivity can be increased as compared with the protective coat 15 of the first embodiment described above, so the rotor of the first embodiment described above. 0 can also improve the heat radiation performance from highly preferred.

同様に、前述した第二番目の実施形態の保護リング２５を、水酸化アルミニウムやアルミナや窒化ホウ素等のように樹脂やゴムよりも高い熱伝導性を有する材料からなる充填材を含有する樹脂やゴム等の高分子材料からなる保護リングとすれば、前述した第二番目の実施形態の場合よりも熱伝導性を高めて放熱性能を高めることができ、非常に好ましい。   Similarly, the protective ring 25 of the second embodiment described above is a resin containing a filler made of a material having higher thermal conductivity than a resin or rubber, such as aluminum hydroxide, alumina, boron nitride, or the like. If the protective ring is made of a polymer material such as rubber, the heat conductivity can be increased and the heat dissipation performance can be improved more than in the case of the second embodiment described above, which is very preferable.

本発明に係る回転電機の表面永久磁石型ロータは、保持リングの酸化劣化を大きく抑制して、保持リングの強度低下を大きく抑制することができるので、産業上、極めて有益に利用することができる。   The surface permanent magnet type rotor of the rotating electrical machine according to the present invention can greatly suppress the oxidative deterioration of the retaining ring and greatly suppress the decrease in the strength of the retaining ring. .

１０ ロータ
１１ 軸部
１２ コア部
１３ 永久磁石
１４ 保持リング
１５ 保護コート
２０ ロータ
２５ 保護リング
３０ ロータ
３５ 保護ライナ DESCRIPTION OF SYMBOLS 10 Rotor 11 Shaft part 12 Core part 13 Permanent magnet 14 Holding ring 15 Protection coat 20 Rotor 25 Protection ring 30 Rotor 35 Protection liner

Claims (4)

コア部の外周面に複数の永久磁石を布設して、当該永久磁石を当該コア部の外周面に押え付けるように繊維強化樹脂からなる保持リングを複数嵌合することにより、当該永久磁石を当該コア部に当該保持リングで固定した回転電機の表面永久磁石型ロータにおいて、
前記保持リングの端面を覆う高分子材料からなる保護体が設けられている
ことを特徴とする回転電機の表面永久磁石型ロータ。 By laying a plurality of permanent magnets on the outer peripheral surface of the core portion and fitting a plurality of retaining rings made of fiber reinforced resin so as to press the permanent magnet against the outer peripheral surface of the core portion, In the surface permanent magnet type rotor of the rotating electrical machine fixed to the core portion with the retaining ring,
A surface permanent magnet rotor for a rotating electrical machine, wherein a protective body made of a polymer material that covers an end face of the retaining ring is provided. 請求項１に記載の回転電機の表面永久磁石型ロータにおいて、
前記保護体が、前記保持リングの外周面及び端面を被覆する保護層である
ことを特徴とする回転電機の表面永久磁石型ロータ。 In the surface permanent magnet type rotor of the rotating electrical machine according to claim 1,
The surface permanent magnet rotor for a rotating electrical machine, wherein the protective body is a protective layer that covers an outer peripheral surface and an end surface of the holding ring. 請求項１に記載の回転電機の表面永久磁石型ロータにおいて、
前記保護体が、前記コア部の軸方向で隣り合う前記保持リングの間及び当該軸方向両端側に位置する前記保持リングの軸方向外側に位置するように前記コアの前記永久磁石上にそれぞれ嵌合して当該保持リングの端面を塞ぐ複数の保護リングである
ことを特徴とする回転電機の表面永久磁石型ロータ。 In the surface permanent magnet type rotor of the rotating electrical machine according to claim 1,
The protector is fitted on the permanent magnet of the core so that the protector is positioned between the holding rings adjacent in the axial direction of the core portion and on the outer side in the axial direction of the holding ring located on both ends in the axial direction. A surface permanent magnet type rotor for a rotating electrical machine, wherein the plurality of protective rings close the end face of the retaining ring. 請求項１から請求項３のいずれか一項に記載の回転電機の表面永久磁石型ロータにおいて、
前記保護体が、前記高分子材料よりも高い熱伝導性を有する材料からなる充填材を含有するものである
ことを特徴とする回転電機の表面永久磁石型ロータ。 In the surface permanent magnet type rotor of the rotating electrical machine according to any one of claims 1 to 3,
The surface permanent magnet rotor of a rotating electrical machine, wherein the protective body contains a filler made of a material having higher thermal conductivity than the polymer material.
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