JP3364960B2 - Permanent magnet motor rotor - Google Patents
Permanent magnet motor rotorInfo
- Publication number
- JP3364960B2 JP3364960B2 JP23675792A JP23675792A JP3364960B2 JP 3364960 B2 JP3364960 B2 JP 3364960B2 JP 23675792 A JP23675792 A JP 23675792A JP 23675792 A JP23675792 A JP 23675792A JP 3364960 B2 JP3364960 B2 JP 3364960B2
- Authority
- JP
- Japan
- Prior art keywords
- peripheral portion
- permanent magnet
- rotor
- inner peripheral
- outer peripheral
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
- Motor Or Generator Frames (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は電動機の防振構造に関す
るものであり、特にエアコンや給湯機等に使用される永
久磁石電動機の回転子の防振装置に関するものである。
【０００２】
【従来の技術】近年、永久磁石電動機はその制御性の良
さによりファンモータに広く使用されている。以下に従
来の永久磁石電動機の回転子について図３に基づき説明
する。
【０００３】図３において、１１は永久磁石電動機の一
種であるＤＣブラシレスモータを示し、固定子鉄心８と
回転子鉄心５とから構成されている。回転子鉄心５には
永久磁石４が配設され、軸６が固定され軸受け７を介し
て固定子鉄心８が配設されている固定子枠に回転自在に
組み付けられている。また、軸６の端部にはファン９が
ナット１２により固定されている。また、前記回転子鉄
心５と永久磁石４は図４に示すように構成されている。
【０００４】
【発明が解決しようとする課題】この構造によれば回転
子鉄心に振動減衰性が乏しいため、固定子の回転磁界に
よって回転子に発生する回転方向の振動が軸６を介して
ファン９に伝達し、ファン９が振動して不快な音の原因
となっていた。
【０００５】この不快な音の対策として、図５に示すよ
うに回転子鉄心５を永久磁石４を固着結合させる外周部
分１と軸に固定する内周部分２で構成し、これら２つの
部分の間に防振ゴム３を挿入していた。しかし、後から
ゴムを挿入するといった従来方法ではスラスト方向の力
に対して弱く、回転子鉄心が内周部分と防振ゴムの接合
部や外周部分と内周部分の接合部でずれや抜けを生じた
り、回転子鉄心が偏心したり傾く等の問題を有してい
た。
【０００６】一方、発生する音の低減を図る方法とし
て、電気的にはスキュー着磁をしている場合がある。し
かし、その場合には磁束の損失により効率や出力が低下
し好ましくない。
【０００７】本発明は上記従来の問題点を解決するもの
で、回転子構造を工夫することにより振動が低減でき、
かつ回転子鉄心の内周部分と防振ゴムの接合部や外周部
分と内周部分の接合部でのずれや抜けおよび回転子鉄心
の偏心や傾きのない永久磁石電動機の回転子を提供する
ことを目的とする。
【０００８】
【課題を解決するための手段】この目的を達成するため
に本発明の永久磁石電動機の回転子は、回転子鉄心を永
久磁石を固着結合させる外周部分と、軸に固定する内周
部分と、これら２つの部分を連結する防振ゴムとで構成
し、上記外周部分および内周部分は鉄板を積層してなる
永久磁石を有する電動機の回転子において、上記外周部
分の内輪側および上記内周部分外輪側の形状をそれぞれ
複数の凸極を有する形状とし、鉄板を積層するに際し少
なくとも１枚以上回転方向にずらして積層し、上記防振
ゴムはエラストマを用い上記外周部分および内周部分と
一体に成形した構成を有している。
【０００９】
【作用】この構成により、軸に回転方向の振動を伝達し
にくくし、かつ回転子鉄心の内周部分と防振ゴムの接合
部や外周部分と内周部分の接合部でのずれや抜け、およ
び回転子鉄心の偏心や傾きを防止することができる。
【００１０】ただし、外周部分の外側の内径は永久磁石
の短絡磁束が外周部分で十分に飽和しきるだけ小さくす
ることがある。また、防振ゴムは所要のトルクを伝達す
る力に耐えること、および軸の先端振れを用途により許
容範囲内に保つこと、回転子と固定子との間の空隙を保
つこと以外は防振性能面より可能な限り剛性を小さくす
ることができる。
【００１１】
【実施例】以下、本発明の一実施例を図面に基づき説明
する。
【００１２】図１において、１は回転子鉄心の永久磁石
を固着結合させる外周部分であり、２は回転子鉄心の軸
に固定する内周部分であり、３はこれら２つの部分を連
結する防振ゴムであり、４は永久磁石である。また、外
周部分１は図２（ａ）に示すような内輪側が複数の凸極
を有する鉄板ａを１枚ずつ凸極の１／２ピッチ角でずら
して積層したものであり、内周部分２は図２（ｂ）に示
すような外輪側が複数の凸極を有する鉄板ｂを１枚ずつ
凸極の１／２ピッチ角でずらして積層したものであり、
防振ゴム３はエラストマを用い、外周部分１および内周
部分２と一体に成形したものである。
【００１３】また、外周部分１の凸極の数と内周部分２
の凸極の数を変えた他の実施例も本発明に含まれるもの
である。ただし、外周部分および内周部分の鉄板を積層
する際のずらし角については、それぞれ凸極ピッチ角よ
り小さくする必要がある。
【００１４】
【発明の効果】以上のような構成とすることにより、効
果的に振動が吸収できるとともに、回転子鉄心の内周部
分と防振ゴムの接合部や外周部分と内周部分の接合部で
のずれや抜け、および回転子鉄心の偏心や傾きを防止で
きる。また、スキュー着磁による磁束の損失がなく高効
率，高出力化が図ることができる。また、実施例に示す
ような回転子鉄心を鉄板をプレスにより打ち抜き積層
し、エラストマと一体成形することにより耐久性，信頼
性等に優れる防振構造回転子が提供可能となる。さらに
防振性能は、防振ゴムの材質および径方向の寸法を調整
することで任意に設定できる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration structure for a motor, and more particularly to an anti-vibration device for a rotor of a permanent magnet motor used in an air conditioner, a water heater or the like. It is about. [0002] In recent years, permanent magnet motors have been widely used for fan motors due to their good controllability. Hereinafter, a conventional permanent magnet motor rotor will be described with reference to FIG. [0003] In FIG. 3, reference numeral 11 denotes a DC brushless motor, which is a kind of permanent magnet motor, and includes a stator core 8 and a rotor core 5. The permanent magnet 4 is disposed on the rotor core 5, and the shaft 6 is fixed and is rotatably assembled via a bearing 7 to a stator frame on which the stator core 8 is disposed. A fan 9 is fixed to an end of the shaft 6 by a nut 12. The rotor core 5 and the permanent magnet 4 are configured as shown in FIG. According to this structure, since the rotor core has poor vibration damping properties, the vibration in the rotating direction generated on the rotor by the rotating magnetic field of the stator is transmitted through the shaft 6 to the fan. 9, and the fan 9 vibrated, causing an unpleasant sound. As a countermeasure against this unpleasant sound, as shown in FIG. 5, a rotor core 5 is constituted by an outer peripheral portion 1 for fixing and connecting a permanent magnet 4 and an inner peripheral portion 2 for fixing to a shaft. The anti-vibration rubber 3 was inserted between them. However, the conventional method, such as inserting rubber later, is weak against the force in the thrust direction, and the rotor core slips or slips off at the joint between the inner peripheral part and the vibration isolating rubber or at the joint between the outer peripheral part and the inner peripheral part. Or the rotor core is eccentric or tilted. On the other hand, as a method of reducing generated noise, there is a case where skew magnetization is performed electrically. However, in such a case, the efficiency and output decrease due to the loss of magnetic flux, which is not preferable. The present invention solves the above-mentioned conventional problems. By devising a rotor structure, vibration can be reduced.
And a rotor for a permanent magnet motor free of slippage or slippage at a joint between an inner peripheral portion of a rotor core and an anti-vibration rubber and a joint between an outer peripheral portion and an inner peripheral portion, and eccentricity or inclination of the rotor core. With the goal. In order to achieve this object, a rotor of a permanent magnet motor according to the present invention comprises an outer peripheral portion for fixing a permanent magnet to a rotor core and an inner peripheral portion for fixing the rotor core to a shaft. And an outer peripheral portion and an inner peripheral portion of the rotor of the electric motor having a permanent magnet formed by laminating iron plates. The outer peripheral side of the inner peripheral portion has a shape having a plurality of salient poles, and at least one or more iron plates are laminated while being shifted in the rotation direction when laminating the iron plates. It is configured to be integrally formed with the above. With this configuration, it is difficult to transmit the vibration in the rotational direction to the shaft, and the displacement at the joint between the inner peripheral portion of the rotor core and the vibration-proof rubber or at the joint between the outer peripheral portion and the inner peripheral portion. Eccentricity and inclination of the rotor core can be prevented. However, the inner diameter outside the outer peripheral portion may be small enough that the short-circuited magnetic flux of the permanent magnet is sufficiently saturated in the outer peripheral portion. In addition, the anti-vibration rubber has the anti-vibration performance other than withstanding the force transmitting the required torque, keeping the tip runout of the shaft within the allowable range depending on the application, and maintaining the air gap between the rotor and stator. The rigidity can be made as low as possible from the surface. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes an outer peripheral portion of a rotor core to which permanent magnets are fixedly connected, 2 denotes an inner peripheral portion fixed to a shaft of the rotor core, and 3 denotes a protection connecting these two portions. Vibration rubber, 4 is a permanent magnet. The outer peripheral portion 1 is formed by laminating iron plates a having a plurality of salient poles on the inner ring side one by one at a half pitch angle of the salient poles, as shown in FIG. Is an iron plate b having a plurality of salient poles on the outer ring side, as shown in FIG. 2 (b), stacked one by one at a pitch angle of 1/2 of the salient pole.
The anti-vibration rubber 3 is made of an elastomer and is formed integrally with the outer peripheral portion 1 and the inner peripheral portion 2. Further, the number of salient poles of the outer peripheral portion 1 and the inner peripheral portion 2
Another embodiment in which the number of salient poles is changed is also included in the present invention. However, it is necessary to make each of the shift angles at the time of laminating the iron plates of the outer peripheral portion and the inner peripheral portion smaller than the salient pole pitch angle. According to the above construction, vibration can be effectively absorbed, and a joint between the inner peripheral portion of the rotor core and the vibration isolating rubber and a joint between the outer peripheral portion and the inner peripheral portion can be obtained. It is possible to prevent misalignment or dropout in the portion, and eccentricity or inclination of the rotor core. Further, high efficiency and high output can be achieved without loss of magnetic flux due to skew magnetization. Further, the rotor core as shown in the embodiment is stamped and laminated by pressing an iron plate with an iron plate, and is integrally formed with the elastomer, so that it is possible to provide a vibration-proof rotor having excellent durability and reliability. Further, the vibration isolation performance can be arbitrarily set by adjusting the material and the radial dimension of the vibration isolation rubber.
【図面の簡単な説明】
【図１】本発明の一実施例における永久磁石電動機の回
転子の構造図
（ａ）軸方向平面図
（ｂ）Ａ−Ｏ−Ａ′断面図
【図２】（ａ）図１の本発明実施例に用いる鉄板ａの軸
方向平面図
（ｂ）図１の本発明実施例に用いる鉄板ｂの軸方向平面
図
【図３】従来の永久磁石電動機の構造を示す軸方向断面
図
【図４】従来の永久磁石電動機の回転子を示す構造図
（ａ）軸方向平面図
（ｂ）Ｂ−Ｂ′断面図
【図５】従来の防振方法を施した永久磁石電動機の回転
子の構造図
（ａ）軸方向平面図
（ｂ）Ｃ−Ｃ′断面図
【符号の説明】
１ 外周部分
２ 内周部分
３ 防振ゴム
４ 永久磁石BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural view of a rotor of a permanent magnet motor according to one embodiment of the present invention, (a) an axial plan view, and (b) a cross-sectional view taken along the line AOA ′. a) An axial plan view of an iron plate a used in the embodiment of the present invention in FIG. 1 (b) An axial plan view of an iron plate b used in the embodiment of the present invention in FIG. 1 FIG. 3 shows a structure of a conventional permanent magnet motor. FIG. 4 is a structural view showing a rotor of a conventional permanent magnet electric motor. FIG. 5 (a) is a plan view in the axial direction. Structure of motor rotor (a) Axial plan view (b) CC 'cross-sectional view [Explanation of reference numerals] 1 Outer peripheral portion 2 Inner peripheral portion 3 Anti-vibration rubber 4 Permanent magnet
───────────────────────────────────────────────────── フロントページの続き (72)発明者 渡辺 彰彦 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (72)発明者 本田 幸夫 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (72)発明者 山下 文敏 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (56)参考文献 特開 昭59−86444（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H02K 1/30 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Akihiko Watanabe 1006 Kadoma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Yukio Honda 1006 Kadoma Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (72) Inventor Fumitoshi Yamashita 1006 Kazuma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-59-86444 (JP, A) (58) Fields investigated (Int. 7 , DB name) H02K 1/30
Claims (1)
て、回転子鉄心を永久磁石を固着結合させる外周部分と
軸に固定する内周部分と前記２つの部分を連結する防振
ゴムで構成し、前記外周部分および内周部分は鉄板を積
層してなる永久磁石を有する電動機の回転子において、
前記外周部分の内輪側および前記内周部分の外輪側の形
状をそれぞれ複数の凸極を有する形状とし、鉄板を積層
するに際し少なくとも１枚以上回転方向にずらして積層
し、前記防振ゴムはエラストマを用い前記外周部分およ
び内周部分と一体に成形したことを特徴とする永久磁石
電動機の回転子。(57) Claims 1. A rotor for a motor having a permanent magnet, comprising: an outer peripheral portion for fixing a rotor core to a permanent magnet; an inner peripheral portion for fixing the rotor core to a shaft; In the rotor of the electric motor having a permanent magnet formed by laminating an iron plate,
The inner ring side of the outer peripheral portion and the outer ring side of the inner peripheral portion each have a shape having a plurality of salient poles. When laminating iron plates, at least one or more iron plates are displaced in the rotation direction and laminated, and the vibration damping rubber is made of an elastomer. A rotor for a permanent magnet motor, wherein the rotor is formed integrally with the outer peripheral portion and the inner peripheral portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23675792A JP3364960B2 (en) | 1992-09-04 | 1992-09-04 | Permanent magnet motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23675792A JP3364960B2 (en) | 1992-09-04 | 1992-09-04 | Permanent magnet motor rotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0686485A JPH0686485A (en) | 1994-03-25 |
| JP3364960B2 true JP3364960B2 (en) | 2003-01-08 |
Family
ID=17005344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23675792A Expired - Lifetime JP3364960B2 (en) | 1992-09-04 | 1992-09-04 | Permanent magnet motor rotor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3364960B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100385773C (en) * | 2006-03-30 | 2008-04-30 | 南京航空航天大学 | Column-projection-polar composite rotor structure |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002058229A (en) * | 2001-06-25 | 2002-02-22 | Hitachi Ltd | Permanent magnet type brushless motor and air conditioner therewith |
| JP2003061279A (en) * | 2001-08-08 | 2003-02-28 | Matsushita Electric Ind Co Ltd | Rotor for motor |
| JP4729270B2 (en) * | 2004-06-02 | 2011-07-20 | シナノケンシ株式会社 | Permanent magnet motor rotor |
| DE102006021244A1 (en) * | 2006-04-28 | 2007-11-08 | Bühler Motor GmbH | Permanent magnet rotor |
| KR100915365B1 (en) * | 2007-10-25 | 2009-09-03 | 영 춘 정 | rotor of BL motor |
| US8299661B2 (en) * | 2007-05-11 | 2012-10-30 | Sntech Inc. | Rotor of brushless motor |
| JP5231790B2 (en) * | 2007-11-20 | 2013-07-10 | 日本電産テクノモータ株式会社 | Motor rotor and motor |
| US8552601B2 (en) | 2008-03-13 | 2013-10-08 | Panasonic Corporation | Electric motor and electrical machinery equipped therewith |
| JP5338641B2 (en) * | 2008-12-03 | 2013-11-13 | パナソニック株式会社 | Electric motor and electric device including the same |
| JP5428347B2 (en) * | 2009-01-15 | 2014-02-26 | パナソニック株式会社 | Electric motor and electric device including the electric motor |
| CN104518584B (en) * | 2013-09-27 | 2017-01-04 | 安徽明腾永磁机电设备有限公司 | Permanent magnetic electric machine rotor iron core |
| CN104269949B (en) * | 2014-10-20 | 2017-02-15 | 湖州南洋电机有限公司 | Washing machine motor rotor with mute function |
| CN104242578B (en) * | 2014-10-20 | 2017-04-05 | 湖州南洋电机有限公司 | Motor for washer with mute function |
| CN113825820B (en) * | 2019-05-21 | 2024-07-02 | 阿论化成株式会社 | Thermoplastic elastomer composition for damping member |
| FR3108803B1 (en) * | 2020-03-25 | 2022-03-11 | Novares France | Rotor for electric motor incorporating sound absorption elements |
| KR20230005521A (en) | 2021-07-01 | 2023-01-10 | 주식회사 엘지화학 | Method for hydrogenation of nitrile-based rubber |
-
1992
- 1992-09-04 JP JP23675792A patent/JP3364960B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100385773C (en) * | 2006-03-30 | 2008-04-30 | 南京航空航天大学 | Column-projection-polar composite rotor structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0686485A (en) | 1994-03-25 |
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