JP2004023864A - Rotor of permanent magnet rotary electric machine - Google Patents

Rotor of permanent magnet rotary electric machine Download PDF

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Publication number
JP2004023864A
JP2004023864A JP2002174004A JP2002174004A JP2004023864A JP 2004023864 A JP2004023864 A JP 2004023864A JP 2002174004 A JP2002174004 A JP 2002174004A JP 2002174004 A JP2002174004 A JP 2002174004A JP 2004023864 A JP2004023864 A JP 2004023864A
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Japan
Prior art keywords
permanent magnet
rotor
magnet
electric machine
permanent
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JP2002174004A
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Japanese (ja)
Inventor
Masao Okiyokota
沖横田　政雄
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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

<P>PROBLEM TO BE SOLVED: To provide a rotor of a permanent magnet rotary electric machine in which a permanent magnet is attached with no working, a magnetic flux leakage is reduced, and even if a part of the permanent magnet is chipped, it will not splash. <P>SOLUTION: A pair of grooves 12a and 12b extending axially are formed along a permanent magnet 11 disposed on the surface of a rotor core 12 of an IPS motor, with the surface of the permanent magnet 11 covered with a flexible magnet cover 13. The both ends of it are inserted into the grooves 12a and 12b, respectively, and the both ends of the magnet cover 13 are pressurized and fixed with stop pins 14a and 14b inserted into the pair of grooves 12a and 12b. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は永久磁石回転電機の回転子に関し、特に回転子鉄心の表面に永久磁石を固着して界磁を形成するＳＰＭモータに適用して有用なものである。
【０００２】
【従来の技術】
永久磁石モータは、高効率、小型化等の点で誘導モータに対して優位性を有しており、近年各産業分野で注目されている。永久磁石モータは、大きくＩＰＭモータ及びＳＰＭモータの２種類に分けられる。ＩＰＭモータは、図５（ａ）に示すように、永久磁石１ａ、１ｂ、１ｃ、１ｄを回転子鉄心２の内部に軸方向に嵌入したものである。一方、ＳＰＭモータは、図５（ｂ）に示すように、永久磁石３ａ、３ｂ、３ｃ、３ｄを回転子鉄心４の表面に固定したものである。
【０００３】
図６は従来技術に係るＳＰＭモータの回転子における永久磁石３の固定態様を示している。同図に示すように、従来技術においては、一般に回転子鉄心４に下部の幅が漸増する形状のアリ溝４ａをその軸方向に形成し、このアリ溝４ａに永久磁石３を嵌め込むことにより固定している。
【０００４】
【発明が解決しようとする課題】
ところが、上述の如き固定方法には次のような問題がある。すなわち、永久磁石３をアリ溝４ａの形状に合わせて加工しなければならないが、現状の磁石成形技術では、磁石を斜めに加工することは難しく、コストアップの原因になる。また、永久磁石３の可なりの部分を回転子鉄心４に沈み込ませるとになり、磁束漏れを発生してモータの効率を低下させてしまう。さらに、永久磁石３の露出部分である表面をぶつける等してこれが欠けた場合、その飛散を防ぐ方法がないという問題もある。
【０００５】
本発明は、上記従来技術に鑑み、永久磁石を加工することなく、また漏れ磁束も低減でき、さらに永久磁石の一部が欠けた場合でもこれが飛散しないような構造とした永久磁石回転電機の回転子を提供することを目的とする。
【０００６】
【課題を解決するための手段】
上記目的を達成する本発明の構成は、次の点を特徴とする。
【０００７】
１）　回転子鉄心の表面の周方向に関する複数の位置に、軸方向に亘り配設した複数個の永久磁石で界磁を形成した永久磁石回転電機の回転子において、
回転子鉄心の表面に配設した永久磁石に沿って軸方向に伸びる一対の溝をこの永久磁石の両側に形成するとともに、ステンレス等の可撓性を有する平板部材で形成するマグネットカバーで前記永久磁石の表面を覆うとともに、その両端部を前記溝にそれぞれ挿入し、さらにマグネットカバーの両端部を前記一対の溝に嵌入する止めピンで押圧して固定することにより前記マグネットカバーで永久磁石を固定して構成したこと。
【０００８】
２）　回転子鉄心の表面の周方向に関する複数の位置に、軸方向に亘り配設した複数個の永久磁石で界磁を形成した永久磁石回転電機の回転子において、
回転子鉄心の表面に配設した永久磁石に沿って軸方向に伸びる一対のアリ溝をこの永久磁石の両側に形成する一方、前記一対のアリ溝に嵌入するとともに前記永久磁石の両端部の斜面に当接する非磁性体で形成した楔部材でこの永久磁石を押圧して永久磁石を回転子鉄心に固定して構成したこと。
【０００９】
３）　上記求項２）に記載する永久磁石回転電機の回転子において、
さらにステンレス等の可撓性を有する平板部材で形成するマグネットカバーで前記永久磁石の表面を覆うとともに、このマグネットカバーの両端部を楔部材と永久磁石との間に挟み込んで固定する構成としたこと。
【００１０】
４）　回転子鉄心の表面の周方向に関する複数の位置に、軸方向に亘り配設した複数個の永久磁石で界磁を形成した永久磁石回転電機の回転子において、
永久磁石の外周形状を内周形状とする内部空間を有するとともに、両端部から突出して軸方向に伸びるリブを有するマグネットケースの前記内部空間に永久磁石を挿入してこれを固定するとともに、回転子鉄心に軸方向に亘り形成した一対の溝に永久磁石と一体となった前記マグネットケースをそのリブを介して挿入することにより前記マグネットケースとともに永久磁石を回転子鉄心に固定して構成したこと。
【００１１】
【発明の実施の形態】
以下本発明の実施の形態を図面に基づき詳細に説明する。
【００１２】
＜第１の実施の形態＞
図１は本発明の第１の実施の形態に係る永久磁石回転電機の回転子の一部を抽出して概念的に示す説明図である。同図は一個の永久磁石１１のみに関して示しているが、実際は円柱状の回転子鉄心１２の表面の周方向に関する複数の位置に、軸方向に亘り永久磁石１１と同様の形態で複数の永久磁石が配設・固定してあり、当該永久磁石回転電機の界磁を構成している。本形態に係る永久磁石回転電機の回転子の構造は、次のような製造方法により特定される。
【００１３】
図１（ａ）に示すように、先ず回転子鉄心１２の表面に配設した永久磁石１１に沿って軸方向に伸びる一対の溝１２ａ、１２ｂをこの永久磁石１１の両側に形成する。続いて、図１（ｂ）に示すように、ステンレス等の可撓性を有する平板部材で形成するマグネットカバー１３で前記永久磁石１１の表面を覆うとともに、その両端部を前記溝１２ａ、１２ｂにそれぞれ挿入する。
【００１４】
最後に、マグネットカバー１３の両端部を前記一対の溝１２ａ、１２ｂに嵌入する止めピン１４ａ、１４ｂで押圧して固定することにより前記マグネットカバー１３で永久磁石１１を固定する。
【００１５】
かかる本形態によれば、永久磁石１１の側面形状を斜めにする必要がない。また、永久磁石１１の大部分を回転子鉄心１２の外部に露出させることができるので、磁束漏れを小さくすることができ、その分強力な界磁形成することができる。さらに、何らかの原因で永久磁石が欠けた場合でも、マグネットカバー１３で磁石片が飛散するのを有効に防止し得る。
【００１６】
＜第２の実施の形態＞
図２は本発明の第２の実施の形態に係る永久磁石回転電機の回転子の一部を抽出して概念的に示す説明図である。同図は一個の永久磁石２１のみに関して示しているが、実際は円柱状の回転子鉄心２２の表面の周方向に関する複数の位置に、軸方向に亘り永久磁石２１と同様の形態で複数の永久磁石２１が配設・固定してあり、当該永久磁石回転電機の界磁を構成している。本形態に係る永久磁石回転電機の回転子の構造は、次のような製造方法により特定される。
【００１７】
先ず、図２（ａ）に示すように、回転子鉄心２２の表面に配設した永久磁石２１に沿って軸方向に伸びる一対のアリ溝２２ａ、２２ｂをこの永久磁石２１の両側に形成する。次に、図２（ｂ）に示すように、前記一対のアリ溝２２ａ、２２ｂに非磁性材料で形成した楔部材２４ａ、２４ｂを嵌入するとともにこの楔部材２４ａ、２４ｂを前記永久磁石２１の両端部の斜面に当接させて永久磁石２１を押圧することにより永久磁石２１を回転子鉄心２２に固定する。
【００１８】
かかる本形態によれば、永久磁石２１の大部分を回転子鉄心２２の外部に露出させることができるので、磁束漏れを小さくすることができ、当該永久磁石回転電機の特性を向上させることができる。
【００１９】
＜第３の実施の形態＞
図３は本発明の第３の実施の形態に係る永久磁石回転電機の回転子の一部を抽出して概念的に示す説明図である。同図に示すように、本形態に係る永久磁石回転電機の回転子３２は、図２に示す第２の実施の形態に係る回転子２２と殆ど同一構造のものであるが、さらにステンレス等の可撓性を有する平板部材で形成するマグネットカバー３３で永久磁石２１の表面を覆うとともに、このマグネットカバー３３の両端部を楔部材２４ａ、２４ｂと永久磁石２１との間に挟み込んで固定する構成とした点が異なる。
【００２０】
したがって、本形態に係る永久磁石回転電機は第２の実施の形態と殆ど同様の作用・効果を奏するが、何らかの原因で永久磁石２１が欠けた場合でも、マグネットカバー３３が磁石片が飛散するのを有効に防止する。
【００２１】
＜第４の実施の形態＞
図４は本発明の第４の実施の形態に係る永久磁石回転電機の回転子の一部を抽出して概念的に示す説明図である。同図は一個の永久磁石４１のみに関して示しているが、実際は円柱状の回転子鉄心４２の表面の周方向に関する複数の位置に、軸方向に亘り永久磁石４１と同様の形態で複数の永久磁石が配設・固定してあり、当該永久磁石回転電機の界磁を構成している。本形態に係る永久磁石回転電機の回転子の構造は、次のような製造方法により特定される。
【００２２】
先ず、永久磁石４１の外周形状を内周形状とする内部空間を有するとともに、両端部から突出して軸方向に伸びるリブ４３ａ、４３ｂを有するマグネットケース４３の前記内部空間に永久磁石４１を挿入してこれを固定するとともに、回転子鉄心４２に軸方向に亘り形成した一対の溝４２ａ、４２ｂに永久磁石４１と一体となった前記マグネットケース４３をそのリブ４３ａ、４３ｂを介して挿入することにより永久磁石４１を回転子鉄心４２に固定して構成した。
【００２３】
かかる本形態によれば、永久磁石４１の側面形状を斜めにする必要がない。また、永久磁石４１の大部分を回転子鉄心４２の外部に露出させることができるので、磁束漏れを小さくすることができ、その分強力な界磁形成することができる。さらに、何らかの原因で永久磁石が欠けた場合でも、マグネットケース４３で磁石片が飛散するのを有効に防止し得る。
【００２４】
【発明の効果】
以上実施の形態とともに具体的に説明した通り、〔請求項１〕及び〔請求項４〕に記載する発明によれば、永久磁石の側面形状を斜めにする必要がないため、その作製コストを低減することができる。また、永久磁石の大部分を回転子鉄心の外部に露出させることができるので、磁束漏れを小さくすることができ、当該永久磁石回転電機の特性を向上させることができる。さらに、何らかの原因で永久磁石が欠けた場合でも、磁石片が飛散するのを有効に防止し得る。
【００２５】
また、〔請求項２〕に記載する発明によれば、永久磁石の大部分を回転子鉄心の外部に露出させることができるので、磁束漏れを小さくすることができ、当該永久磁石回転電機の特性を向上させることができる。さらに、回転子の回転に伴い永久磁石に作用する遠心力に抗して永久磁石を回転子鉄心に強固に固定し得る。〔請求項３〕に記載する発明は、〔請求項３〕に記載する発明の作用・効果に加え、何らかの原因で永久磁石が欠けた場合でも、磁石片が飛散するのを有効に防止し得るという効果も奏する。
【図面の簡単な説明】
【図１】本発明の第１の実施の形態に係る回転子をその回転子鉄心に永久磁石を固定する際の態様とともに示す説明図である。
【図２】本発明の第２の実施の形態に係る回転子をその回転子鉄心に永久磁石を固定する際の態様とともに示す説明図である。
【図３】本発明の第３の実施の形態に係る回転子をその回転子鉄心に永久磁石を固定する際の態様とともに示す説明図である。
【図４】本発明の第４の実施の形態に係る回転子をその回転子鉄心に永久磁石を固定する際の態様とともに示す説明図である。
【図５】従来技術に係る永久磁石モータの回転子を抽出して示す図で、（ａ）はＩＰＭモータの回転子、（ｂ）はＳＰＭモータの回転子をそれぞれ示す。
【図６】従来技術に係るＳＰＭモータの回転子における永久磁石の固定態様を示す説明図である。
【符号の説明】
１１、２１、４１　　　　永久磁石
１２、２２、４２　　　　回転子鉄心
１２ａ、１２ｂ　　　　溝
１３　　　　マグネットカバー
１４ａ、１４ｂ　　　　止めピン
２２ａ、２２ｂ　　　　アリ溝
２４ａ、２４ｂ　　　　楔部材
３３　　　　マグネットカバー
４３　　　　マグネットケース
４３ａ、４３ｂ　　　　リブ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rotor of a permanent magnet rotating electric machine, and is particularly useful when applied to an SPM motor that forms a field by fixing a permanent magnet to the surface of a rotor core.
[0002]
[Prior art]
Permanent magnet motors have an advantage over induction motors in terms of high efficiency, miniaturization, and the like, and have recently attracted attention in various industrial fields. Permanent magnet motors are broadly divided into two types: IPM motors and SPM motors. As shown in FIG. 5A, the IPM motor has permanent magnets 1a, 1b, 1c, and 1d fitted in the rotor core 2 in the axial direction. On the other hand, the SPM motor has permanent magnets 3a, 3b, 3c, 3d fixed to the surface of the rotor core 4, as shown in FIG.
[0003]
FIG. 6 shows a fixed state of the permanent magnet 3 in the rotor of the SPM motor according to the related art. As shown in the figure, in the prior art, generally, a dovetail groove 4a having a shape in which the lower portion gradually increases is formed in the rotor core 4 in the axial direction, and the permanent magnet 3 is fitted into the dovetail groove 4a. It is fixed.
[0004]
[Problems to be solved by the invention]
However, the fixing method as described above has the following problems. That is, the permanent magnet 3 must be machined according to the shape of the dovetail groove 4a. However, it is difficult to machine the magnet obliquely with the current magnet molding technology, which causes an increase in cost. In addition, a considerable portion of the permanent magnet 3 is sunk into the rotor core 4, causing magnetic flux leakage and lowering the efficiency of the motor. Furthermore, if the surface of the permanent magnet 3 which is exposed is bumped or the like is broken, there is a problem that there is no method for preventing the scattering.
[0005]
The present invention has been made in view of the above prior art, and has been developed in consideration of the above-described conventional technology. The purpose is to provide children.
[0006]
[Means for Solving the Problems]
The configuration of the present invention that achieves the above object has the following features.
[0007]
1) In a rotor of a permanent magnet rotating electric machine in which a plurality of permanent magnets arranged in the axial direction form a magnetic field at a plurality of positions in a circumferential direction on a surface of a rotor core,
A pair of grooves extending in the axial direction along the permanent magnet provided on the surface of the rotor core are formed on both sides of the permanent magnet, and the permanent magnet is formed by a magnet cover formed of a flexible plate member such as stainless steel. A permanent magnet is fixed by the magnet cover by covering the surface of the magnet, inserting both ends of the magnet into the grooves, and pressing and fixing both ends of the magnet cover with stop pins fitted into the pair of grooves. That it was configured.
[0008]
2) In a rotor of a permanent magnet rotating electric machine in which a field is formed by a plurality of permanent magnets arranged in an axial direction at a plurality of positions in a circumferential direction on a surface of a rotor core,
A pair of dovetail grooves extending in the axial direction along the permanent magnets disposed on the surface of the rotor core are formed on both sides of the permanent magnet, and are fitted into the pair of dovetail grooves and slopes at both ends of the permanent magnet. The permanent magnet is fixed to the rotor core by pressing the permanent magnet with a wedge member made of a non-magnetic material that comes into contact with the permanent magnet.
[0009]
3) In the rotor of the permanent magnet rotating electric machine according to claim 2),
Further, the surface of the permanent magnet is covered with a magnet cover formed of a flexible flat member such as stainless steel, and both ends of the magnet cover are sandwiched and fixed between the wedge member and the permanent magnet. .
[0010]
4) A rotor of a permanent magnet rotating electric machine in which a plurality of permanent magnets arranged in a plurality of positions in the circumferential direction on the surface of the rotor core form a field with a plurality of permanent magnets,
A permanent magnet is inserted into the internal space of the magnet case having a rib protruding from both ends and extending in the axial direction, having a permanent magnet having an internal space in which the outer peripheral shape of the permanent magnet is an inner peripheral shape. The permanent magnet is fixed to the rotor core together with the magnet case by inserting the magnet case integrated with the permanent magnet into a pair of grooves formed in the core in the axial direction through the ribs.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0012]
<First embodiment>
FIG. 1 is an explanatory diagram conceptually showing a part of a rotor of a permanent magnet rotating electric machine according to a first embodiment of the present invention. Although FIG. 1 shows only one permanent magnet 11, a plurality of permanent magnets are actually provided in a plurality of positions in the circumferential direction on the surface of the cylindrical rotor core 12 in the axial direction in the same manner as the permanent magnet 11. Are arranged and fixed, and constitute a field of the permanent magnet rotating electric machine. The structure of the rotor of the permanent magnet rotating electric machine according to the present embodiment is specified by the following manufacturing method.
[0013]
As shown in FIG. 1A, first, a pair of grooves 12 a and 12 b extending in the axial direction along the permanent magnet 11 provided on the surface of the rotor core 12 are formed on both sides of the permanent magnet 11. Subsequently, as shown in FIG. 1B, the surface of the permanent magnet 11 is covered with a magnet cover 13 formed of a flexible flat member such as stainless steel, and both ends of the magnet are covered with the grooves 12a and 12b. Insert each.
[0014]
Finally, the permanent magnet 11 is fixed by the magnet cover 13 by pressing both ends of the magnet cover 13 with fixing pins 14a, 14b fitted into the pair of grooves 12a, 12b.
[0015]
According to this embodiment, it is not necessary to make the side surface shape of the permanent magnet 11 oblique. Further, since most of the permanent magnet 11 can be exposed to the outside of the rotor core 12, magnetic flux leakage can be reduced, and a strong field can be formed correspondingly. Further, even if the permanent magnet is missing for some reason, it is possible to effectively prevent the magnet pieces from scattering on the magnet cover 13.
[0016]
<Second embodiment>
FIG. 2 is an explanatory diagram conceptually illustrating a part of a rotor of a permanent magnet rotating electric machine according to a second embodiment of the present invention. Although FIG. 2 shows only one permanent magnet 21, in practice, a plurality of permanent magnets are formed in a plurality of positions in the circumferential direction on the surface of the cylindrical rotor core 22 in the axial direction in the same manner as the permanent magnet 21. 21 are disposed and fixed, and constitute a field of the permanent magnet rotating electric machine. The structure of the rotor of the permanent magnet rotating electric machine according to the present embodiment is specified by the following manufacturing method.
[0017]
First, as shown in FIG. 2A, a pair of dovetail grooves 22 a and 22 b extending in the axial direction along the permanent magnet 21 provided on the surface of the rotor core 22 are formed on both sides of the permanent magnet 21. Next, as shown in FIG. 2B, wedge members 24a and 24b formed of a non-magnetic material are fitted into the pair of dovetail grooves 22a and 22b, and these wedge members 24a and 24b are connected to both ends of the permanent magnet 21. The permanent magnet 21 is fixed to the rotor core 22 by pressing the permanent magnet 21 in contact with the slope of the portion.
[0018]
According to this embodiment, most of the permanent magnet 21 can be exposed to the outside of the rotor core 22, so that magnetic flux leakage can be reduced, and the characteristics of the permanent magnet rotating electric machine can be improved. .
[0019]
<Third embodiment>
FIG. 3 is an explanatory diagram conceptually showing a part of a rotor of a permanent magnet rotary electric machine according to a third embodiment of the present invention. As shown in the figure, the rotor 32 of the permanent magnet rotating electric machine according to the present embodiment has almost the same structure as the rotor 22 according to the second embodiment shown in FIG. A configuration in which the surface of the permanent magnet 21 is covered with a magnet cover 33 formed of a flexible flat plate member, and both ends of the magnet cover 33 are sandwiched and fixed between the wedge members 24a, 24b and the permanent magnet 21; Is different.
[0020]
Therefore, the permanent magnet rotating electric machine according to the present embodiment has almost the same operation and effect as the second embodiment. However, even if the permanent magnet 21 is missing for some reason, the magnet cover 33 may cause the magnet pieces to scatter. Effectively prevent.
[0021]
<Fourth embodiment>
FIG. 4 is an explanatory diagram conceptually showing a part of a rotor of a permanent magnet rotary electric machine according to a fourth embodiment of the present invention. Although FIG. 3 shows only one permanent magnet 41, a plurality of permanent magnets are actually provided in a plurality of positions in the circumferential direction on the surface of the cylindrical rotor core 42 in the axial direction in the same manner as the permanent magnet 41. Are arranged and fixed, and constitute a field of the permanent magnet rotating electric machine. The structure of the rotor of the permanent magnet rotating electric machine according to the present embodiment is specified by the following manufacturing method.
[0022]
First, the permanent magnet 41 is inserted into the internal space of the magnet case 43, which has an internal space in which the outer peripheral shape of the permanent magnet 41 is an inner peripheral shape, and has ribs 43a and 43b protruding from both ends and extending in the axial direction. This is fixed, and the magnet case 43 integrated with the permanent magnet 41 is inserted into a pair of grooves 42a and 42b formed in the rotor core 42 in the axial direction through the ribs 43a and 43b to make the permanent magnet permanent. The magnet 41 is fixed to the rotor core 42.
[0023]
According to this embodiment, it is not necessary to make the side surface shape of the permanent magnet 41 oblique. Further, since most of the permanent magnet 41 can be exposed to the outside of the rotor core 42, magnetic flux leakage can be reduced, and a strong field can be formed correspondingly. Further, even if the permanent magnet is missing for some reason, the scattering of the magnet pieces in the magnet case 43 can be effectively prevented.
[0024]
【The invention's effect】
As described specifically with the above embodiments, according to the inventions described in [Claim 1] and [Claim 4], it is not necessary to make the side surfaces of the permanent magnets oblique, so that the manufacturing cost can be reduced. can do. Further, since most of the permanent magnet can be exposed to the outside of the rotor core, magnetic flux leakage can be reduced, and the characteristics of the permanent magnet rotating electric machine can be improved. Further, even if the permanent magnet is missing for some reason, it is possible to effectively prevent the magnet pieces from scattering.
[0025]
According to the invention described in [Claim 2], most of the permanent magnets can be exposed to the outside of the rotor core, so that magnetic flux leakage can be reduced, and the characteristics of the permanent magnet rotating electric machine can be reduced. Can be improved. Further, the permanent magnet can be firmly fixed to the rotor core against the centrifugal force acting on the permanent magnet with the rotation of the rotor. According to the invention described in [Claim 3], in addition to the operation and effect of the invention described in [Claim 3], even if the permanent magnet is missing for some reason, it is possible to effectively prevent the magnet pieces from scattering. It also has the effect.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a rotor according to a first embodiment of the present invention, together with a mode when a permanent magnet is fixed to the rotor core.
FIG. 2 is an explanatory diagram showing a rotor according to a second embodiment of the present invention, together with a mode when a permanent magnet is fixed to the rotor core.
FIG. 3 is an explanatory view showing a rotor according to a third embodiment of the present invention, together with a mode when a permanent magnet is fixed to the rotor core.
FIG. 4 is an explanatory diagram showing a rotor according to a fourth embodiment of the present invention, together with a mode when a permanent magnet is fixed to the rotor core.
5A and 5B are diagrams illustrating extracted rotors of a permanent magnet motor according to the related art, wherein FIG. 5A illustrates a rotor of an IPM motor, and FIG. 5B illustrates a rotor of an SPM motor.
FIG. 6 is an explanatory diagram showing a fixed state of a permanent magnet in a rotor of an SPM motor according to the related art.
[Explanation of symbols]
11, 21, 41 Permanent magnets 12, 22, 42 Rotor cores 12a, 12b Grooves 13 Magnet covers 14a, 14b Stop pins 22a, 22b Dovetail grooves 24a, 24b Wedge member 33 Magnet cover 43 Magnet cases 43a, 43b Ribs

Claims (4)

回転子鉄心の表面の周方向に関する複数の位置に、軸方向に亘り配設した複数個の永久磁石で界磁を形成した永久磁石回転電機の回転子において、
回転子鉄心の表面に配設した永久磁石に沿って軸方向に伸びる一対の溝をこの永久磁石の両側に形成するとともに、ステンレス等の可撓性を有する平板部材で形成するマグネットカバーで前記永久磁石の表面を覆うとともに、その両端部を前記溝にそれぞれ挿入し、さらにマグネットカバーの両端部を前記一対の溝に嵌入する止めピンで押圧して固定することにより前記マグネットカバーで永久磁石を固定して構成したことを特徴とする永久磁石回転電機の回転子。At a plurality of positions in the circumferential direction of the surface of the rotor core, in a rotor of a permanent magnet rotating electric machine in which a field is formed by a plurality of permanent magnets arranged in an axial direction,
A pair of grooves extending in the axial direction along the permanent magnet provided on the surface of the rotor core are formed on both sides of the permanent magnet, and the permanent magnet is formed by a magnet cover formed of a flexible plate member such as stainless steel. A permanent magnet is fixed by the magnet cover by covering the surface of the magnet, inserting both ends of the magnet into the grooves, and pressing and fixing both ends of the magnet cover with stop pins fitted into the pair of grooves. A rotor for a permanent magnet rotating electric machine, wherein the rotor is configured as follows. 回転子鉄心の表面の周方向に関する複数の位置に、軸方向に亘り配設した複数個の永久磁石で界磁を形成した永久磁石回転電機の回転子において、
回転子鉄心の表面に配設した永久磁石に沿って軸方向に伸びる一対のアリ溝をこの永久磁石の両側に形成する一方、前記一対のアリ溝に嵌入するとともに前記永久磁石の両端部の斜面に当接する非磁性体で形成した楔部材でこの永久磁石を押圧して永久磁石を回転子鉄心に固定して構成したことを特徴とする永久磁石回転電機の回転子。At a plurality of positions in the circumferential direction of the surface of the rotor core, in a rotor of a permanent magnet rotating electric machine in which a field is formed by a plurality of permanent magnets arranged in an axial direction,
A pair of dovetail grooves extending in the axial direction along the permanent magnets disposed on the surface of the rotor core are formed on both sides of the permanent magnet, and are fitted into the pair of dovetail grooves and slopes at both ends of the permanent magnet. A permanent magnet that is fixed to a rotor core by pressing the permanent magnet with a wedge member made of a nonmagnetic material that abuts on the rotor. 〔請求項２〕に記載する永久磁石回転電機の回転子において、
さらにステンレス等の可撓性を有する平板部材で形成するマグネットカバーで前記永久磁石の表面を覆うとともに、このマグネットカバーの両端部を楔部材と永久磁石との間に挟み込んで固定する構成としたことを特徴とする永久磁石回転電機の回転子。In the rotor of the permanent magnet rotating electric machine according to claim 2,
Further, the surface of the permanent magnet is covered with a magnet cover formed of a flexible flat member such as stainless steel, and both ends of the magnet cover are sandwiched and fixed between the wedge member and the permanent magnet. A rotor for a permanent magnet rotating electric machine characterized by the above-mentioned. 回転子鉄心の表面の周方向に関する複数の位置に、軸方向に亘り配設した複数個の永久磁石で界磁を形成した永久磁石回転電機の回転子において、
永久磁石の外周形状を内周形状とする内部空間を有するとともに、両端部から突出して軸方向に伸びるリブを有するマグネットケースの前記内部空間に永久磁石を挿入してこれを固定するとともに、回転子鉄心に軸方向に亘り形成した一対の溝に永久磁石と一体となった前記マグネットケースをそのリブを介して挿入することにより前記マグネットケースとともに永久磁石を回転子鉄心に固定して構成したことを特徴とする永久磁石回転電機の回転子。At a plurality of positions in the circumferential direction of the surface of the rotor core, in a rotor of a permanent magnet rotating electric machine in which a field is formed by a plurality of permanent magnets arranged in an axial direction,
A permanent magnet is inserted into the internal space of the magnet case having a rib protruding from both ends and extending in the axial direction, having a permanent magnet having an internal space in which the outer peripheral shape of the permanent magnet is an inner peripheral shape. The permanent magnet is fixed to the rotor core together with the magnet case by inserting the magnet case integrated with the permanent magnet into a pair of grooves formed in the core in the axial direction through the ribs. Characteristic rotor of permanent magnet rotating electric machine.
JP2002174004A 2002-06-14 2002-06-14 Rotor of permanent magnet rotary electric machine Withdrawn JP2004023864A (en)

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