JP2005020892A - Permanent magnet type rotating electric machine, rotor thereof magnet fixing plate, and magnet fixing method - Google Patents

Permanent magnet type rotating electric machine, rotor thereof magnet fixing plate, and magnet fixing method Download PDF

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Publication number
JP2005020892A
JP2005020892A JP2003182347A JP2003182347A JP2005020892A JP 2005020892 A JP2005020892 A JP 2005020892A JP 2003182347 A JP2003182347 A JP 2003182347A JP 2003182347 A JP2003182347 A JP 2003182347A JP 2005020892 A JP2005020892 A JP 2005020892A
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JP
Japan
Prior art keywords
magnet
permanent magnet
rotor
fixing plate
type rotating
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Pending
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JP2003182347A
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Japanese (ja)
Inventor
Koji Nagata
耕治 永田
Yukimasa Hisamitsu
行正 久光
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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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Priority to JP2003182347A priority Critical patent/JP2005020892A/en
Publication of JP2005020892A publication Critical patent/JP2005020892A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To obtain an inexpensive permanent magnet type rotating electric machine of a simple constitution, or the rotor of the machine. <P>SOLUTION: A magnet fixing plate 3 made of a magnetic material is wound to the magnet attaching surface of the rotor 1 along the circumferential direction. A plurality of projections 4 are formed at intervals in the circumferential direction by a press as the magnet fixing plate 3. The rotor 1 is fixed to the magnet fixing plate 3, and a permanent magnet 2 is inserted between the two projections 4 of the magnet fixing plate 3 and fixed to the plate. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は永久磁石式回転電機における永久磁石の固定技術に関する。
【０００２】
【従来の技術】
従来の永久磁石式回転電機では、下記に示す方法により永久磁石を回転子鉄心に固定している。
方法１：接着剤で永久磁石を回転子鉄心に貼り付けて固定する。
方法２：押さえ金具で永久磁石を回転子鉄心に押さえて固定する。
方法３：回転子鉄心上に永久磁石を配置し、ガラスバインドテープで永久磁石の外周面を巻きつけて固定する。
方法４：回転子鉄心上に永久磁石を配置し、非磁性金属バンドで永久磁石の外周面を巻きつけて固定する。
方法５：回転子鉄心にくさび状溝を形成し、永久磁石を溝に嵌め接着剤で固定する。
【０００３】
【特許文献１】
特開平７−３１８３７号公報
【特許文献２】
特開２０００−１３９０４３
【０００４】
【発明が解決しようとする課題】
上記の従来技術には、以下の問題点がある。
１．接着剤使用の場合：回転方向に対する磁石の位置決めがないため、隣り合う磁石との貼り付け位置の精度が出ない。着磁された磁石の接着は、隣り合う磁石が引き寄せられるため、困難である。
２．押さえ金具の場合：金具の製作がコスト高となる。また、金具を固定する多数のねじ締めが必要なため、組立工数が多くなる。
３．ガラスバインドテープの場合：ガラスバインドテープの厚みのため、固定子と回転子とのギャップが大きくなり、回転電機の出力が低下する。ガラスバインドテープの巻きつけに工数がかかり、コスト高となる。
４．非磁性金属バンドの場合：ガラスバインドテープ同様、固定子と回転子とのギャップが大きくなり、回転電機の出力が低下する。また、薄いバンドの製作は困難である。
５．くさび状溝の場合：くさび状溝の製作あるいは加工はコスト高である。
【０００５】
本発明の課題は、上記従来技術の問題点を解決する永久磁石固定技術を提供することである。
【０００６】
【課題を解決するための手段】
第１発明は、上記課題を解決する永久磁石式回転電機であり、回転子の外周もしくは内周に永久磁石を装着した永久磁石式回転電機において、回転子の磁石装着面に周方向に沿って巻きつけられる磁性材料製の磁石固定板であって、プレスにて前記周方向に間隔を置いて成形された、前記磁石装着面とは反対方向へ向く複数の突起を有する磁石固定板と、この磁石固定板を回転子に固定する第１の固定手段と、前記磁石固定板の２つの突起間に挿入された永久磁石と、この永久磁石を前記磁石固定板に固定する第２の固定手段を備えることを特徴とする。
【０００７】
第２発明は、第１発明において、間に永久磁石が挿入される２つの突起が基端側に広く、先端側に狭いくさび状の溝を形成していることを特徴とする永久磁石式回転電機である。
【０００８】
第３発明は、第１または第２発明において、永久磁石が挿入される２つの突起間の外側に、少なくとも１つの突起に対応してプレス成形時に開いた穴が存在することを特徴とする永久磁石式回転電機である。
【０００９】
第４発明は、第１から第３発明いずれかにおいて、第１の固定手段は前記磁石固定板の弾性力であることを特徴とする永久磁石式回転電機である。
【００１０】
第５発明は、第１から第３発明いずれかにおいて、第１の固定手段は突起間に挿入した永久磁石の磁力であることを特徴とする永久磁石式回転電機である。
【００１１】
第６発明は、第１から第３発明いずれかにおいて、第１の固定手段はねじ又は接着剤であることを特徴とする永久磁石式回転電機である。
【００１２】
第７発明は、第１から第３発明いずれかにおいて、第２の固定手段は突起と永久磁石間の摩擦力であることを特徴とする永久磁石式回転電機である。
【００１３】
第８発明は、第１から第３発明いずれかにおいて、第２の固定手段は突起間に挿入した永久磁石の磁力であることを特徴とする永久磁石式回転電機である。
【００１４】
第９発明は、第１から第３発明いずれかにおいて、第２の固定手段は接着剤であることを特徴とする永久磁石式回転電機である。
【００１５】
第１０発明は、上記課題を解決する磁石固定板であり、永久磁石式回転電機の回転子の磁石装着面に周方向に沿って巻きつけられて固定される磁性材料製の磁石固定板であって、プレスにて前記周方向に間隔を置いて成形され、永久磁石が間に挿入されて固定される複数の突起を有することを特徴とする。
【００１６】
第１１発明は、上記課題を解決する磁石固定方法であり、永久磁石式回転電機の回転子の磁石装着面に第１０発明の磁石固定板を、前記磁石装着面とは反対側に突起を向けて巻きつけて固定し、突起間に永久磁石を挿入して固定することを特徴とする。
【００１７】
第１２発明は、上記課題を解決する永久磁石式回転電機の回転子であり、第１０発明の磁石固定板が、回転子の磁石装着面に、該磁石装着面とは反対側に突起を向けて巻きつけ固定され、前記磁石固定板の突起間に永久磁石が挿入され固定されていることを特徴とする。
【００１８】
【発明の実施の形態】
以下、図面を参照しながら本発明の実施の形態を説明する。
【００１９】
［第１実施例］
図１に本発明の第１実施例に係る永久磁石式回転電機、とくにその回転子構造を示し、図１（ａ）は回転子全体の正面図、図１（ｂ）は一部の斜視図、図１（ｃ）一部の正面図である。図１中、１は回転子、２は磁石（永久磁石）、３は磁石固定板、４は突起、５は孔、６は磁石挿入部位を示している。
【００２０】
図１に示す回転子１はインナーロータ形永久磁石式回転電機の回転子であり、その磁石装着面に周方向に沿って鉄板等の磁性材料製の磁石固定板３が巻きつけられている。磁石固定板３は、プレスにより、回転子１の磁石装着面とは反対方向へ向く複数の突起４が磁石装着面の周方向に間隔を置いて成形されたものである。磁石挿入部位６は隣接する突起４の間であり、その周方向長さは磁石２の周方向長さとほぼ同じである。孔５は突起４をプレスで成形したときに残った孔であり、この例では磁石挿入部位６に存在している。突起４は回転子１の軸方向に幅を持ち、その軸方向の長さは磁石２より長くても短くてもよい。突起４の高さは磁石２より磁石固定板３を低くしてある。
【００２１】
磁石２を回転子１に取り付ける際、磁石固定板３を回転子１の磁石装着面とは反対側に突起４を向けて、つまり突起４を外側に向けて巻きつけて固定し、突起４間に永久磁石２を挿入して固定する。この例の磁石２は着磁済みであり、磁石２の磁力が磁石固定板３を回転子１に固定し（第１の固定手段）、また、磁石２の磁力が磁石２自身を磁石固定板３に固定する（第２の固定手段）。なお、磁石固定板３自身の縮まろうとする弾性力も磁石固定板３を回転子１に固定するのに寄与するようにしている（第１の固定手段）。
【００２２】
［第２実施例］
図２に本発明の第２実施例に係る永久磁石式回転電機、とくにその回転子構造を示す。本第２実施例は、図１に示したものと比較すると、ねじ７を併用して磁石固定板３を回転子１に固定している（第１の固定手段）点が異なり、他は同じである。ねじ７に代えて、あるいは、ねじ７と併用して、接着剤を用いて磁石固定板３を回転子１に固定すること（第１の固定手段）も可能である。ねじ７や接着剤を用いて磁石固定板３を回転子１に固定する場合は、磁石２が着磁済みのものでなくても磁石固定板３を回転子１に固定することができる。
【００２３】
［第３実施例］
図３に本発明の第３実施例に係る永久磁石式回転電機、とくにその回転子構造を示す。図３（ａ）は回転子全体の正面図、図３（ｂ）はその斜視図である。本第３実施例は、図１に示したものと比較すると、永久磁石２が基端側に広く、先端側に狭いくさび状を成している点と、永久磁石２が間に挿入される２つの突起４が基端側に広く、先端側に狭いくさび状の溝８を形成している点が異なり、他は同じである。この例では、磁石２をくさび状溝８に装着するので、突起４と永久磁石２間の摩擦力のため（第２の固定手段）、磁石２の固定がより強固である。
【００２４】
［第４実施例］
図４に本発明の第３実施例に係る永久磁石式回転電機、とくにその回転子構造を示す。図４（ａ）は回転子全体の正面図、図４（ｂ）はその斜視図である。本第４実施例は、図３に示したものと比較すると、ねじ７を併用して磁石固定板３を回転子１に固定している（第１の固定手段）点が異なり、他は同じである。ねじ７に代えて、あるいは、ねじ７と併用して、接着剤を用いて磁石固定板３を回転子１に固定すること（第１の固定手段）も可能である。ねじ７や接着剤を用いて磁石固定板３を回転子１に固定する場合は、磁石２が着磁済みのものでなくても磁石固定板３を回転子１に固定することができる。
【００２５】
［第５実施例］
図５に本発明の第１実施例に係る永久磁石式回転電機、とくにその回転子構造を示し、図５（ａ）は回転子全体の斜視図、図５（ｂ）はその正面図である。図５中、１０は回転子、２は磁石（永久磁石）、３は磁石固定板、４は突起、５は孔、６は磁石挿入部位を示している。
【００２６】
図５に示す回転子１０はアウターロータ形永久磁石式回転電機の回転子であり、その磁石装着面に周方向に沿って鉄板等の磁性材料製の磁石固定板３が巻きつけられている。磁石固定板３は、プレスにより、回転子１０の磁石装着面とは反対方向へ向く複数の突起４が磁石装着面の周方向に間隔を置いて成形されたものである。磁石挿入部位６は隣接する突起４の間であり、その周方向長さは磁石２の周方向長さとほぼ同じである。孔５は突起４をプレスで成形したときに残った孔であり、この例では磁石挿入部位６に存在している。突起４は回転子１０の軸方向に幅を持ち、その軸方向の長さは磁石２より長くても短くてもよい。突起４の高さは磁石２より磁石固定板３を低くしてある。
【００２７】
磁石２を回転子１０に取り付ける際、磁石固定板３を回転子１０の磁石装着面とは反対側に突起４を向けて、つまり突起４を内側に向けて巻きつけて固定し、突起４間に永久磁石２を挿入して固定する。この例の磁石２は着磁済みであり、磁石２の磁力が磁石固定板３を回転子１０に固定し（第１の固定手段）、また、磁石２の磁力が磁石２自身を磁石固定板３に固定する（第２の固定手段）。なお、磁石固定板３自身の広がろうとする弾性力も磁石固定板３を回転子１０に固定するのに寄与するようにしている（第１の固定手段）。
【００２８】
本第５実施例においても、第２実施例と同様、ねじを用いて磁石固定板３を回転子１０に固定してもよく（第１の固定手段）、また、ねじに代えて、あるいはねじと併用して、接着剤を用いて磁石固定板３を回転子１０に固定すること（第１の固定手段）も可能である。ねじや接着剤を用いて磁石固定板３を回転子１０に固定する場合は、磁石２が着磁済みのものでなくても磁石固定板３を回転子１０に固定することができる。
【００２９】
［第６実施例］
図６に本発明の第６実施例に係る永久磁石式回転電機、とくにその回転子構造を示す。図６（ａ）は回転子全体の正面図、図６（ｂ）はその斜視図である。本第６実施例は、図５に示したものと比較すると、永久磁石２が基端側に広く、先端側に狭いくさび状を成している点と、間に永久磁石２が挿入される２つの突起４が基端側に広く、先端側に狭いくさび状の溝８を形成している点が異なり、他は同じである。この例では、磁石２をくさび状溝８に装着するので、突起４と永久磁石２間の摩擦力のため（第２の固定手段）、磁石２の固定がより強固である。
【００３０】
本第６実施例においても、第４実施例と同様、ねじを用いて磁石固定板３を回転子１０に固定してもよく（第１の固定手段）、また、ねじに代えて、あるいはねじと併用して、接着剤を用いて磁石固定板３を回転子１０に固定すること（第１の固定手段）も可能である。ねじや接着剤を用いて磁石固定板３を回転子１０に固定する場合は、磁石２が着磁済みのものでなくても磁石固定板３を回転子１０に固定することができる。
【００３１】
［第７実施例］
以上説明した第１から第６実施例では、突起４をプレスで成形したときに残った孔５は磁石挿入部位６（磁石２が挿入される２つの突起４間）に存在しているが、突起４に対応してプレス成形時に開いた孔５が少なくとも１つ磁石挿入部位６の外側に存在することにより、その分、磁石２下の磁石固定板３と回転子１または１０との間の隙間がなくなるため、磁束の洩れが減り、永久磁石式回転電機の特に優れる。
【００３２】
図７に示す第７実施例は、図１の第１実施例について、平行な突起４をプレスで成形する際、全ての孔５が磁石挿入部位６の外側に残るようにプレスした例である。
【００３３】
［第８実施例］
図８に示す第８実施例は、図５の第５実施例について、平行な突起４をプレスで成形する際、全ての孔５が磁石挿入部位６の外側に残るようにプレスした例である。
【００３４】
［第９実施例］
図９に示す第９実施例は、図３の第３実施例について、くさび状溝８をなす突起４をプレスで成形する際に、全ての孔５が磁石挿入部位６の外側に残るようにプレスした例である。
【００３５】
［第１０実施例］
図１０に示す第１０実施例は、図６の第６実施例について、くさい状溝８をなす突起４をプレスで成形する際に、全ての孔５が磁石挿入部位６の外側に残るようにプレスした例である。
【００３６】
【発明の効果】
本発明によれば、磁石固定板を用いることにより、永久磁石式回転電機、あるいはその回転子の構造が簡単で、安価に製品を得ることができる。磁石固定板はプレス加工により一体成形されるため、寸法精度に優れ、永久磁石の位置固定の精度が高くでき、回転電機の特性に優れる。磁石固定板を用いるため、固定子と回転子とのギャップが小さくでき、回転電機の特性が向上する。また、突起をプレスで成形したときに残る孔が磁石が挿入される突起間の外側に存在する場合は、磁石下の磁石固定板と回転子との間の隙間がなくなるため、磁束の洩れが減り、回転電機の特に優れる。
【図面の簡単な説明】
【図１】本発明の第１実施例を示す図。
【図２】本発明の第２実施例を示す図。
【図３】本発明の第３実施例を示す図。
【図４】本発明の第４実施例を示す図。
【図５】本発明の第５実施例を示す図。
【図６】本発明の第６実施例を示す図。
【図７】本発明の第７実施例を示す図。
【図８】本発明の第８実施例を示す図。
【図９】本発明の第９実施例を示す図。
【図１０】本発明の第１０実施例を示す図。
【符号の説明】
１、１０ 回転子
２ 永久磁石
３ 磁石固定板
４ 突起
５ 孔
６ 磁石挿入部位
７ ねじ
８ くさび状溝[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a permanent magnet fixing technique in a permanent magnet type rotating electrical machine.
[0002]
[Prior art]
In a conventional permanent magnet type rotating electrical machine, a permanent magnet is fixed to a rotor core by the method described below.
Method 1: A permanent magnet is attached to the rotor core with an adhesive and fixed.
Method 2: A permanent magnet is pressed against the rotor iron core with a pressing metal and fixed.
Method 3: A permanent magnet is placed on the rotor iron core, and the outer peripheral surface of the permanent magnet is wound and fixed with a glass binding tape.
Method 4: A permanent magnet is placed on the rotor core, and the outer peripheral surface of the permanent magnet is wound around and fixed with a nonmagnetic metal band.
Method 5: A wedge-shaped groove is formed in the rotor core, and a permanent magnet is fitted into the groove and fixed with an adhesive.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 7-31837 [Patent Document 2]
JP2000-139043
[0004]
[Problems to be solved by the invention]
The above prior art has the following problems.
1. When using an adhesive: Since there is no positioning of the magnet with respect to the rotation direction, the accuracy of the adhering position with the adjacent magnet does not appear. Adhesion of magnetized magnets is difficult because adjacent magnets are attracted.
2. In the case of a presser bracket: The manufacturing of the bracket is costly. In addition, since a large number of screws for fixing the metal fitting are required, the number of assembly steps increases.
3. In the case of glass binding tape: Due to the thickness of the glass binding tape, the gap between the stator and the rotor is increased, and the output of the rotating electrical machine is reduced. It takes a lot of time to wind the glass binding tape, which increases the cost.
4). In the case of a non-magnetic metal band: Like the glass binding tape, the gap between the stator and the rotor increases, and the output of the rotating electrical machine decreases. Also, it is difficult to produce a thin band.
5. For wedge-shaped grooves: The production or processing of wedge-shaped grooves is expensive.
[0005]
An object of the present invention is to provide a permanent magnet fixing technique that solves the above-described problems of the prior art.
[0006]
[Means for Solving the Problems]
1st invention is a permanent-magnet-type rotary electric machine which solves the said subject, In the permanent-magnet-type rotary electric machine which attached the permanent magnet to the outer periphery or the inner periphery of the rotor, along the circumferential direction on the magnet mounting surface of the rotor. A magnet fixing plate made of a magnetic material to be wound, the magnet fixing plate having a plurality of protrusions that are formed at intervals in the circumferential direction by a press and facing in a direction opposite to the magnet mounting surface, and A first fixing means for fixing the magnet fixing plate to the rotor; a permanent magnet inserted between two projections of the magnet fixing plate; and a second fixing means for fixing the permanent magnet to the magnet fixing plate. It is characterized by providing.
[0007]
The second invention is the permanent magnet type rotation according to the first invention, characterized in that the two protrusions into which the permanent magnets are inserted are wide on the proximal end side and have a narrow wedge-shaped groove on the distal end side. Electric.
[0008]
A third invention is characterized in that, in the first or second invention, a hole opened at the time of press molding corresponding to at least one projection exists outside the two projections into which the permanent magnet is inserted. It is a magnet type rotating electrical machine.
[0009]
A fourth invention is the permanent magnet type rotating electric machine according to any one of the first to third inventions, wherein the first fixing means is an elastic force of the magnet fixing plate.
[0010]
A fifth invention is the permanent magnet type rotating electric machine according to any one of the first to third inventions, wherein the first fixing means is a magnetic force of a permanent magnet inserted between the protrusions.
[0011]
A sixth invention is the permanent magnet type rotating electric machine according to any one of the first to third inventions, wherein the first fixing means is a screw or an adhesive.
[0012]
A seventh invention is the permanent magnet type rotating electrical machine according to any one of the first to third inventions, wherein the second fixing means is a frictional force between the protrusion and the permanent magnet.
[0013]
An eighth invention is the permanent magnet type rotating electrical machine according to any one of the first to third inventions, wherein the second fixing means is a magnetic force of a permanent magnet inserted between the protrusions.
[0014]
A ninth invention is the permanent magnet type rotating electric machine according to any one of the first to third inventions, wherein the second fixing means is an adhesive.
[0015]
A tenth aspect of the invention is a magnet fixing plate that solves the above-described problems, and is a magnet fixing plate made of a magnetic material that is wound around a magnet mounting surface of a rotor of a permanent magnet type rotating electric machine along the circumferential direction and fixed. And a plurality of protrusions which are formed by a press at intervals in the circumferential direction and in which a permanent magnet is inserted and fixed.
[0016]
An eleventh aspect of the present invention is a magnet fixing method for solving the above-mentioned problems, wherein the magnet fixing plate of the tenth aspect of the invention is directed to the magnet mounting surface of the rotor of the permanent magnet type rotating electric machine, and the protrusion is directed to the opposite side of the magnet mounting surface. It is characterized in that it is wound and fixed, and a permanent magnet is inserted between the protrusions and fixed.
[0017]
A twelfth aspect of the present invention is a rotor of a permanent magnet type rotating electrical machine that solves the above-mentioned problems, and the magnet fixing plate of the tenth aspect of the present invention has a projection facing the magnet mounting surface of the rotor opposite to the magnet mounting surface. And a permanent magnet is inserted and fixed between the protrusions of the magnet fixing plate.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0019]
[First embodiment]
FIG. 1 shows a permanent magnet type rotating electrical machine according to a first embodiment of the present invention, particularly its rotor structure. FIG. 1 (a) is a front view of the whole rotor, and FIG. 1 (b) is a partial perspective view. FIG. 1 (c) is a partial front view. In FIG. 1, 1 is a rotor, 2 is a magnet (permanent magnet), 3 is a magnet fixing plate, 4 is a protrusion, 5 is a hole, and 6 is a magnet insertion site.
[0020]
A rotor 1 shown in FIG. 1 is a rotor of an inner rotor type permanent magnet type rotating electrical machine, and a magnet fixing plate 3 made of a magnetic material such as an iron plate is wound around a magnet mounting surface along a circumferential direction. The magnet fixing plate 3 is formed by pressing a plurality of protrusions 4 facing in a direction opposite to the magnet mounting surface of the rotor 1 at intervals in the circumferential direction of the magnet mounting surface. The magnet insertion site 6 is between adjacent protrusions 4, and the circumferential length thereof is substantially the same as the circumferential length of the magnet 2. The hole 5 is a hole left when the protrusion 4 is formed by pressing, and in this example, the hole 5 exists in the magnet insertion portion 6. The protrusion 4 has a width in the axial direction of the rotor 1, and the axial length may be longer or shorter than the magnet 2. The height of the protrusion 4 is such that the magnet fixing plate 3 is lower than the magnet 2.
[0021]
When attaching the magnet 2 to the rotor 1, the magnet fixing plate 3 is fixed with the protrusion 4 facing the opposite side of the rotor 1 from the magnet mounting surface, that is, the protrusion 4 is wound outward and fixed. The permanent magnet 2 is inserted into and fixed to. The magnet 2 in this example is already magnetized, and the magnetic force of the magnet 2 fixes the magnet fixing plate 3 to the rotor 1 (first fixing means), and the magnetic force of the magnet 2 causes the magnet 2 itself to become a magnet fixing plate. 3 (second fixing means). It should be noted that the elastic force of the magnet fixing plate 3 itself to shrink contributes to fixing the magnet fixing plate 3 to the rotor 1 (first fixing means).
[0022]
[Second Embodiment]
FIG. 2 shows a permanent magnet type rotating electrical machine according to a second embodiment of the present invention, particularly its rotor structure. The second embodiment is different from the one shown in FIG. 1 in that the magnet fixing plate 3 is fixed to the rotor 1 by using the screw 7 together (first fixing means), and the others are the same. It is. It is also possible to fix the magnet fixing plate 3 to the rotor 1 by using an adhesive instead of the screw 7 or in combination with the screw 7 (first fixing means). When the magnet fixing plate 3 is fixed to the rotor 1 using the screw 7 or an adhesive, the magnet fixing plate 3 can be fixed to the rotor 1 even if the magnet 2 is not magnetized.
[0023]
[Third embodiment]
FIG. 3 shows a permanent magnet type rotating electrical machine according to a third embodiment of the present invention, particularly its rotor structure. FIG. 3A is a front view of the entire rotor, and FIG. 3B is a perspective view thereof. In the third embodiment, the permanent magnet 2 is inserted in between the point that the permanent magnet 2 is wide at the proximal end side and narrow at the distal end side as compared with that shown in FIG. The other difference is that the two protrusions 4 are wide at the base end side and form a narrow wedge-shaped groove 8 at the tip end side. In this example, since the magnet 2 is mounted in the wedge-shaped groove 8, the magnet 2 is more firmly fixed due to the frictional force between the protrusion 4 and the permanent magnet 2 (second fixing means).
[0024]
[Fourth embodiment]
FIG. 4 shows a permanent magnet type rotating electrical machine according to a third embodiment of the present invention, particularly its rotor structure. 4A is a front view of the entire rotor, and FIG. 4B is a perspective view thereof. The fourth embodiment is different from the one shown in FIG. 3 in that the magnet fixing plate 3 is fixed to the rotor 1 by using the screw 7 together (first fixing means), and the others are the same. It is. It is also possible to fix the magnet fixing plate 3 to the rotor 1 by using an adhesive instead of the screw 7 or in combination with the screw 7 (first fixing means). When the magnet fixing plate 3 is fixed to the rotor 1 using the screw 7 or an adhesive, the magnet fixing plate 3 can be fixed to the rotor 1 even if the magnet 2 is not magnetized.
[0025]
[Fifth embodiment]
FIG. 5 shows a permanent magnet type rotating electrical machine according to the first embodiment of the present invention, particularly its rotor structure. FIG. 5 (a) is a perspective view of the whole rotor and FIG. 5 (b) is a front view thereof. . In FIG. 5, 10 is a rotor, 2 is a magnet (permanent magnet), 3 is a magnet fixing plate, 4 is a protrusion, 5 is a hole, and 6 is a magnet insertion site.
[0026]
A rotor 10 shown in FIG. 5 is a rotor of an outer rotor type permanent magnet type rotating electrical machine, and a magnet fixing plate 3 made of a magnetic material such as an iron plate is wound around the magnet mounting surface along the circumferential direction. The magnet fixing plate 3 is formed by pressing a plurality of protrusions 4 facing in the direction opposite to the magnet mounting surface of the rotor 10 at intervals in the circumferential direction of the magnet mounting surface. The magnet insertion site 6 is between adjacent protrusions 4, and the circumferential length thereof is substantially the same as the circumferential length of the magnet 2. The hole 5 is a hole left when the protrusion 4 is formed by pressing, and in this example, the hole 5 exists in the magnet insertion portion 6. The protrusion 4 has a width in the axial direction of the rotor 10, and the axial length may be longer or shorter than the magnet 2. The height of the protrusion 4 is such that the magnet fixing plate 3 is lower than the magnet 2.
[0027]
When the magnet 2 is attached to the rotor 10, the magnet fixing plate 3 is fixed with the protrusion 4 facing the opposite side of the rotor 10 from the magnet mounting surface, that is, the protrusion 4 is wound inward and fixed. The permanent magnet 2 is inserted into and fixed to. The magnet 2 in this example is already magnetized, and the magnetic force of the magnet 2 fixes the magnet fixing plate 3 to the rotor 10 (first fixing means), and the magnetic force of the magnet 2 causes the magnet 2 itself to become a magnet fixing plate. 3 (second fixing means). It should be noted that the elastic force of the magnet fixing plate 3 itself to spread contributes to fixing the magnet fixing plate 3 to the rotor 10 (first fixing means).
[0028]
Also in the fifth embodiment, similarly to the second embodiment, the magnet fixing plate 3 may be fixed to the rotor 10 by using screws (first fixing means), or instead of screws or screws. In combination, it is also possible to fix the magnet fixing plate 3 to the rotor 10 using an adhesive (first fixing means). When the magnet fixing plate 3 is fixed to the rotor 10 using screws or an adhesive, the magnet fixing plate 3 can be fixed to the rotor 10 even if the magnet 2 is not magnetized.
[0029]
[Sixth embodiment]
FIG. 6 shows a permanent magnet type rotating electrical machine according to a sixth embodiment of the present invention, particularly its rotor structure. FIG. 6A is a front view of the entire rotor, and FIG. 6B is a perspective view thereof. In the sixth embodiment, the permanent magnet 2 is inserted between the point that the permanent magnet 2 is wide at the proximal end side and narrow at the distal end side as compared with that shown in FIG. The other difference is that the two protrusions 4 are wide at the base end side and form a narrow wedge-shaped groove 8 at the tip end side. In this example, since the magnet 2 is mounted in the wedge-shaped groove 8, the magnet 2 is more firmly fixed due to the frictional force between the protrusion 4 and the permanent magnet 2 (second fixing means).
[0030]
Also in the sixth embodiment, similarly to the fourth embodiment, the magnet fixing plate 3 may be fixed to the rotor 10 by using screws (first fixing means), or instead of screws or screws. In combination, it is also possible to fix the magnet fixing plate 3 to the rotor 10 using an adhesive (first fixing means). When the magnet fixing plate 3 is fixed to the rotor 10 using screws or an adhesive, the magnet fixing plate 3 can be fixed to the rotor 10 even if the magnet 2 is not magnetized.
[0031]
[Seventh embodiment]
In the first to sixth embodiments described above, the hole 5 remaining when the protrusion 4 is formed by pressing exists in the magnet insertion portion 6 (between the two protrusions 4 into which the magnet 2 is inserted). Since at least one hole 5 opened at the time of press molding corresponding to the protrusion 4 is present outside the magnet insertion portion 6, the portion between the magnet fixing plate 3 under the magnet 2 and the rotor 1 or 10 correspondingly. Since there is no gap, the leakage of magnetic flux is reduced, and the permanent magnet type rotating electrical machine is particularly excellent.
[0032]
The seventh embodiment shown in FIG. 7 is an example in which the parallel projections 4 are pressed so that all the holes 5 remain outside the magnet insertion portion 6 with respect to the first embodiment of FIG. .
[0033]
[Eighth embodiment]
The eighth embodiment shown in FIG. 8 is an example in which the parallel projections 4 are pressed so that all the holes 5 remain outside the magnet insertion portion 6 in the fifth embodiment of FIG. .
[0034]
[Ninth embodiment]
In the ninth embodiment shown in FIG. 9, when the projections 4 forming the wedge-shaped grooves 8 are formed by pressing in the third embodiment of FIG. 3, all the holes 5 remain outside the magnet insertion portion 6. This is an example of pressing.
[0035]
[Tenth embodiment]
The tenth embodiment shown in FIG. 10 is such that all the holes 5 remain outside the magnet insertion portion 6 when the projections 4 forming the wedge-shaped grooves 8 are formed by pressing in the sixth embodiment of FIG. This is an example of pressing.
[0036]
【The invention's effect】
According to the present invention, by using a magnet fixing plate, the structure of a permanent magnet type rotating electrical machine or its rotor is simple and a product can be obtained at low cost. Since the magnet fixing plate is integrally formed by pressing, the dimensional accuracy is excellent, the position fixing accuracy of the permanent magnet can be increased, and the characteristics of the rotating electrical machine are excellent. Since the magnet fixing plate is used, the gap between the stator and the rotor can be reduced, and the characteristics of the rotating electrical machine are improved. In addition, when the holes remaining when the protrusions are formed by pressing exist outside the protrusions between which the magnets are inserted, there is no gap between the magnet fixing plate under the magnet and the rotor, so that leakage of magnetic flux occurs. Reduced, especially excellent for rotating electrical machines.
[Brief description of the drawings]
FIG. 1 is a diagram showing a first embodiment of the present invention.
FIG. 2 is a diagram showing a second embodiment of the present invention.
FIG. 3 is a diagram showing a third embodiment of the present invention.
FIG. 4 is a diagram showing a fourth embodiment of the present invention.
FIG. 5 is a diagram showing a fifth embodiment of the present invention.
FIG. 6 is a diagram showing a sixth embodiment of the present invention.
FIG. 7 is a diagram showing a seventh embodiment of the present invention.
FIG. 8 is a diagram showing an eighth embodiment of the present invention.
FIG. 9 is a diagram showing a ninth embodiment of the present invention.
FIG. 10 is a diagram showing a tenth embodiment of the present invention.
[Explanation of symbols]
1, 10 Rotor 2 Permanent magnet 3 Magnet fixing plate 4 Protrusion 5 Hole 6 Magnet insertion site 7 Screw 8 Wedge groove

Claims (12)

回転子の外周もしくは内周に永久磁石を装着した永久磁石式回転電機において、
回転子の磁石装着面に周方向に沿って巻きつけられる磁性材料製の磁石固定板であって、プレスにて前記周方向に間隔を置いて成形された、前記磁石装着面とは反対方向へ向く複数の突起を有する磁石固定板と、この磁石固定板を回転子に固定する第１の固定手段と、前記磁石固定板の２つの突起間に挿入された永久磁石と、この永久磁石を前記磁石固定板に固定する第２の固定手段を備えることを特徴とする永久磁石式回転電機。In the permanent magnet type rotating electrical machine in which a permanent magnet is mounted on the outer periphery or inner periphery of the rotor,
A magnet fixing plate made of a magnetic material wound around the magnet mounting surface of the rotor along the circumferential direction, which is formed by a press at an interval in the circumferential direction, in a direction opposite to the magnet mounting surface A magnet fixing plate having a plurality of facing projections, a first fixing means for fixing the magnet fixing plate to the rotor, a permanent magnet inserted between two projections of the magnet fixing plate, and the permanent magnet A permanent magnet type rotating electrical machine comprising second fixing means for fixing to a magnet fixing plate. 請求項１において、間に永久磁石が挿入される２つの突起が基端側に広く、先端側に狭いくさび状の溝を形成していることを特徴とする永久磁石式回転電機。2. The permanent magnet type rotating electrical machine according to claim 1, wherein the two protrusions into which the permanent magnet is inserted are wide on the proximal end side and have a narrow wedge-shaped groove on the distal end side. 請求項１または２において、永久磁石が挿入される２つの突起間の外側に、少なくとも１つの突起に対応してプレス成形時に開いた穴が存在することを特徴とする永久磁石式回転電機。3. The permanent magnet type rotating electrical machine according to claim 1, wherein a hole opened at the time of press molding corresponding to at least one projection exists outside the two projections into which the permanent magnet is inserted. 請求項１から３いずれかにおいて、第１の固定手段は前記磁石固定板の弾性力であることを特徴とする永久磁石式回転電機。4. The permanent magnet type rotating electric machine according to claim 1, wherein the first fixing means is an elastic force of the magnet fixing plate. 請求項１から３いずれかにおいて、第１の固定手段は突起間に挿入した永久磁石の磁力であることを特徴とする永久磁石式回転電機。4. The permanent magnet type rotating electric machine according to claim 1, wherein the first fixing means is a magnetic force of a permanent magnet inserted between the protrusions. 請求項１から３いずれかにおいて、第１の固定手段はねじ又は接着剤であることを特徴とする永久磁石式回転電機。4. The permanent magnet type rotating electric machine according to claim 1, wherein the first fixing means is a screw or an adhesive. 請求項１から３いずれかにおいて、第２の固定手段は突起と永久磁石間の摩擦力であることを特徴とする永久磁石式回転電機。4. The permanent magnet type rotating electric machine according to claim 1, wherein the second fixing means is a frictional force between the protrusion and the permanent magnet. 請求項１から３いずれかにおいて、第２の固定手段は突起間に挿入した永久磁石の磁力であることを特徴とする永久磁石式回転電機。4. The permanent magnet type rotating electric machine according to claim 1, wherein the second fixing means is a magnetic force of a permanent magnet inserted between the protrusions. 請求項１から３いずれかにおいて、第２の固定手段は接着剤えあることを特徴とする永久磁石式回転電機。4. The permanent magnet type rotating electric machine according to claim 1, wherein the second fixing means includes an adhesive. 永久磁石式回転電機の回転子の磁石装着面に周方向に沿って巻きつけられて固定される磁性材料製の磁石固定板であって、プレスにて前記周方向に間隔を置いて成形され、永久磁石が間に挿入されて固定される複数の突起を有することを特徴とする磁石固定板。A magnet fixing plate made of a magnetic material that is wound around and fixed to the magnet mounting surface of the rotor of a permanent magnet type rotating electrical machine along the circumferential direction, and is molded at intervals in the circumferential direction by a press, A magnet fixing plate having a plurality of protrusions into which a permanent magnet is inserted and fixed. 永久磁石式回転電機の回転子の磁石装着面に請求項１０に記載の磁石固定板を、前記磁石装着面とは反対側に突起を向けて巻きつけて固定し、突起間に永久磁石を挿入して固定することを特徴とする磁石固定方法。The magnet fixing plate according to claim 10 is fixed to a magnet mounting surface of a rotor of a permanent magnet type rotating electric machine by winding a projection facing a side opposite to the magnet mounting surface, and a permanent magnet is inserted between the projections. And fixing the magnet. 永久磁石式回転電機の回転子において、
請求項１０に記載の磁石固定板が、回転子の磁石装着面に、該磁石装着面とは反対側に突起を向けて巻きつけ固定され、前記磁石固定板の突起間に永久磁石が挿入され固定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。In the rotor of a permanent magnet type rotating electrical machine,
The magnet fixing plate according to claim 10 is fixed by being wound around a magnet mounting surface of a rotor with a protrusion facing away from the magnet mounting surface, and a permanent magnet is inserted between the protrusions of the magnet fixing plate. A rotor of a permanent magnet type rotating electrical machine, characterized by being fixed.
JP2003182347A 2003-06-26 2003-06-26 Permanent magnet type rotating electric machine, rotor thereof magnet fixing plate, and magnet fixing method Pending JP2005020892A (en)

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CN106298216A (en) * 2015-05-13 2017-01-04 青岛海尔智能技术研发有限公司 Field system assembly method
CN106298216B (en) * 2015-05-13 2020-04-28 青岛海尔智能技术研发有限公司 Magnetic field system assembling method
WO2019206527A1 (en) * 2018-04-25 2019-10-31 Ebm-Papst St. Georgen Gmbh & Co. Kg Flux return ring and electrical external rotor motor
CN114665635A (en) * 2020-12-22 2022-06-24 日本电产株式会社 Rotor and motor

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