JPH0284032A - Permanent magnet rotor - Google Patents
Permanent magnet rotorInfo
- Publication number
- JPH0284032A JPH0284032A JP1071010A JP7101089A JPH0284032A JP H0284032 A JPH0284032 A JP H0284032A JP 1071010 A JP1071010 A JP 1071010A JP 7101089 A JP7101089 A JP 7101089A JP H0284032 A JPH0284032 A JP H0284032A
- Authority
- JP
- Japan
- Prior art keywords
- yoke
- segment
- permanent magnet
- magnet rotor
- rotor
- 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.)
- Pending
Links
- 229920005989 resin Polymers 0.000 claims abstract description 76
- 239000011347 resin Substances 0.000 claims abstract description 76
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 11
- 230000002093 peripheral effect Effects 0.000 claims description 16
- 239000000696 magnetic material Substances 0.000 claims description 5
- 239000004575 stone Substances 0.000 description 14
- 239000000853 adhesive Substances 0.000 description 10
- 230000001070 adhesive effect Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000000465 moulding Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- 230000004323 axial length Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 229920006337 unsaturated polyester resin Polymers 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、回転子が固定子に外囲される内転型無刷子電
動機に用いられるものであって、セグメント磁石を有す
る永久磁石回転子に関する。Detailed Description of the Invention [Field of Industrial Application] The present invention is used for an internal rotor brushless motor in which a rotor is surrounded by a stator, and the present invention is a permanent magnet rotor having segment magnets. Regarding.
（従来の技術］
内転型無刷子電動機に用いられる永久磁石回転子は、通
常は永久磁石部分が円筒状をなし、その外周面に異極が
交互に現れるようになっている。(Prior Art) In a permanent magnet rotor used in an internal rotor brushless motor, the permanent magnet portion usually has a cylindrical shape, and different poles alternately appear on the outer peripheral surface of the permanent magnet rotor.
この円筒状をなす永久磁石回転子の磁力を増大させる場
合、その形状のために、磁場成形や焼成工程が制約を受
ける。従ってこのような場合、円筒を極毎に分割形成し
たセグメン１−ｆｆ１石を用いる。When increasing the magnetic force of this cylindrical permanent magnet rotor, the magnetic field forming and firing processes are restricted due to its shape. Therefore, in such a case, a segment 1-ff1 stone in which a cylinder is divided into poles is used.
第８図は、かかるセグメント磁石を用いた一般的な永久
磁石回転子で、回転子軸Ａに円筒状のヨークＢが圧入固
着され、ヨークＢの外周にセグメン）１石ＣＩ乃至Ｃ４
が接着されている。Fig. 8 shows a general permanent magnet rotor using such segment magnets, in which a cylindrical yoke B is press-fitted and fixed to the rotor shaft A, and the outer periphery of the yoke B has segment magnets CI to C4.
is glued.
ところで近年、無刷子電動機は小型化・高出力化が必要
とされ、回転子の回転速度も１０．０００ ｒｐｍを超
え、さらには２０．００（ｌ ｒｐｔａをも超えるもの
が要求されてきており、これに伴い、電動機も高温にな
る。By the way, in recent years, brushless motors have been required to be smaller and have higher output, and the rotational speed of the rotor has also been required to exceed 10.000 rpm and even exceed 20.00 (l rpta). As a result, the electric motor also becomes hot.
本願発明者らは、上記した一般的構造のものを、４個の
セグメント磁石を用い、回転子直径を２８１にして試作
し、１２０“Ｃの雰囲気において１２．０００ ｒｐｔ
ａで回転させたところ、遠心力を受けたセグメント磁石
は接着箇所が剥離して飛び散った。すなわちこの構造の
ものは、回転子の回転速度が数千ｒｐｍ程度でのみ使用
可能なものなのである。The inventors of the present application prototyped the above-mentioned general structure using four segment magnets and a rotor diameter of 281 mm, and achieved a speed of 12,000 rpt in an atmosphere of 120"C.
When the magnet was rotated at a speed of a, the adhesive part of the segment magnet was subjected to centrifugal force and the adhesive part peeled off, causing it to scatter. In other words, this structure can only be used when the rotation speed of the rotor is approximately several thousand rpm.
高速回転に対応できる可能性がある永久磁石回転子とし
ては、第９図及び第１０図に示すような特開昭６２−２
４７７４５号に開示されたものがある。このものは、回
転子軸Ａの外周に固着されるヨークＢ （その明細書で
は保持部）に、４個のセグメント［石Ｃ１乃至Ｃ４を係
止するための保持脚Ｂａ、Ｂａ、−・が設けてあり、さ
らに保持脚Ｂａ、Ｂａ、〜の先端に末広がり部Ｂｂ、Ｂ
ｂ、・−・が設けである。セグメン＋−ｍ石ＣＩ乃至Ｃ
４は、保持脚Ｂａ、Ｂａ間に挿入され、そして接着され
る。As a permanent magnet rotor that may be able to handle high-speed rotation, the Japanese Patent Application Laid-Open No. 62-2 shown in Figs. 9 and 10
There is one disclosed in No. 47745. This device has four segments [holding legs Ba, Ba, Ba, ... for locking the stones C1 to C4] on a yoke B (holding part in the specification) fixed to the outer periphery of the rotor shaft A. In addition, the holding legs Ba, Ba, ~ have flared portions Bb, B at the tips of the holding legs Ba, Ba, ~.
b, . . . are provided. Segment+-m stones CI to C
4 is inserted between the holding legs Ba, and is adhered.
従ってセグメン）Ｉ石ＣＩ乃至Ｃ４は、回転子が高速回
転して遠心力を受けても、末広がり部Ｂｂ、Ｂｂ。Therefore, even if the rotor rotates at high speed and receives centrifugal force, the segments Bb, Bb widen at the end.
・−により保持されてヨークＢから飛散するのを防止す
るというものである。- to prevent it from flying away from the yoke B.
このように、セグメント磁石の外周の一部を保持する構
造の永久磁石回転子としては、以下に記載するものがあ
る。As described above, permanent magnet rotors having a structure in which part of the outer periphery of the segment magnets are held include those described below.
第１１図の永久磁石回転子は、米国特許第４，５９１．
７４９号に開示されたもので、回転子軸ＡにヨークＢと
ともに、合成樹脂製の磁石固定枠０が圧入されている。The permanent magnet rotor of FIG. 11 is described in U.S. Pat. No. 4,591.
This is disclosed in No. 749, in which a magnet fixing frame 0 made of synthetic resin is press-fitted into a rotor shaft A together with a yoke B.
この磁石固定枠りは、セグメント磁石ＣＩ乃至Ｃ４を分
離し、かつその外周の一部を保持するための片持ち状の
脚Ｄａ、Ｄａ、−・を有しており、この脚Ｄａ、Ｄａ、
・・−とヨークＢの外周面により形成されるスペースに
、セグメント磁石Ｃ１乃至Ｃ４が装着される。This magnet fixing frame has cantilevered legs Da, Da, - for separating the segment magnets CI to C4 and holding a part of their outer circumferences.
... - and the space formed by the outer peripheral surface of the yoke B, the segment magnets C1 to C4 are mounted.
第１２図及び第１３図の永久磁石回転子は、実開昭５７
−３４１７０号に開示されたもので、４個のセグメン）
ｌｉｆｔ石ＣＩ乃至Ｃ４は、ヨークＢの外周面から所定
間隙をおき、かつ各セグメント磁石Ｃ１乃至Ｃ４の相互
間も所定間隙をおいて配設しておき、これら所定間隙に
ポリエステル樹脂りを樹脂成形加工により充填して、ヨ
ークＢに一体化している。The permanent magnet rotor shown in Fig. 12 and Fig. 13 is
-4 segments)
The lift stones CI to C4 are arranged with a predetermined gap from the outer peripheral surface of the yoke B, and also with a predetermined gap between the segment magnets C1 to C4, and polyester resin is molded in these predetermined gaps. It is filled by processing and integrated into the yoke B.
第１４図の永久磁石回転子は、特開昭６０−３５９４６
号に開示されたもので、ヨークＢの外周面には、４個の
逆テーパの縦溝Ｂａ、Ｂａ、−・−が形成されており、
その外周面に縦溝Ｂａ、Ｂａ、−・−に重ならぬよう４
個のセグメント磁石Ｃ１乃至Ｃ４を配し、そして圧入部
Ｅａと係止部Ｅｂからなる係止部材Ｅを縦溝Ｂａ、Ｂａ
、−・に圧入するものである。The permanent magnet rotor shown in FIG.
The yoke B has four reversely tapered longitudinal grooves Ba, Ba, --- formed on the outer circumferential surface of the yoke B.
4 so as not to overlap the vertical grooves Ba, Ba, --- on its outer peripheral surface.
segment magnets C1 to C4 are arranged, and a locking member E consisting of a press-fitting part Ea and a locking part Eb is arranged in vertical grooves Ba and Ba.
, -.
上記した従来の永久磁石回転子は、一応高速回転に対応
できるかに見える。しかしながら、実用化を検討してみ
ると、解決すべき課題の残るものである。The conventional permanent magnet rotor described above appears to be able to handle high-speed rotation. However, when considering practical application, there remain issues to be solved.
高速回転に対応できる永久磁石回転子の実用化にあたっ
て考慮すべきことは、−船釣に焼結加工により成形され
るセグメント磁石は、それほど高精度の仕上がり寸法が
得られず、しかも機械的強度もそれほど強くないため、
これに対処できるか、という点である。Things to consider when putting a permanent magnet rotor that can handle high-speed rotation into practical use are: - Segment magnets formed by sintering for boat fishing do not have highly accurate finished dimensions, and have poor mechanical strength. Because it's not that strong
The question is whether we can deal with this.
また、セグメント磁石が所定位置に精度良く位置させら
れるか、あるいはその位置が維持できるか、という点で
ある。Another issue is whether the segment magnets can be accurately positioned at predetermined positions, or whether the position can be maintained.
さらに、製作工程が簡易であるかどうか、あるいは製作
工程において性能にばらつきの発注する要素が多いかど
うか等である。Furthermore, whether or not the manufacturing process is simple, or whether there are many elements that require ordering with variations in performance in the manufacturing process, etc.
特開昭６２−２４７７４５号に開示されたもの（第９図
及び第１０図）は、接着剤を用いていること、これによ
り必然的に接着工程を必要とすること、等による問題点
がある。セグメント磁石の仕上がり寸法のばらつきを考
慮したとき、保持脚間はセグメント１石よりやや大きく
せざるを得ない。従ってセグメント磁石の所望位置への
接着が面倒であるうえに、回転子が温度上昇して接着強
度が低下すると、セグメント磁石は保持脚間でがたつく
こととなり、ときには局部的に衝撃荷重を受けて破壊に
至ることもあるのである。The method disclosed in JP-A No. 62-247745 (FIGS. 9 and 10) has problems due to the use of adhesive, which inevitably requires a bonding process, etc. . When considering variations in finished dimensions of segment magnets, the distance between the holding legs must be slightly larger than that of one segment. Therefore, it is troublesome to adhere the segment magnets to the desired positions, and if the temperature of the rotor rises and the adhesive strength decreases, the segment magnets will wobble between the holding legs, and sometimes break due to local impact loads. It can even lead to.
米国特許第４，５９１，７４９号に開示されたもの（第
１１図）は、接着剤を用いていないので、接着剤に起因
する問題点は解消されるが、合成樹脂製である磁石固定
枠の細長い脚のみにより、セグメント磁石を保持しなけ
ればならないという問題点がある０例えば、回転子直径
が２８＋＋＋−であって８ ｇｒのセグメント１石が設
けられているものを２０．００Ｏｒｐｍで回転させると
、セグメント磁石は５０ ｋｇｆの遠心力を受ける。一
方、合成樹脂を機械的強度の大きい熱硬化性樹脂として
みても、回転子の温度が１５０”ｃともなれば、その機
械的強度は常温の１／３程度に低下する。これらのこと
から、このものは、セグメント磁石に加わる遠心力が大
きくないものには好適であるとしても、本発明が対象と
しているような高速回転の回転子には用いることができ
ないものである。The one disclosed in U.S. Patent No. 4,591,749 (Figure 11) does not use adhesive, so the problems caused by adhesive are solved, but the magnet fixing frame is made of synthetic resin. There is a problem in that the segment magnets must be held only by the long thin legs of the rotor.For example, a rotor with a rotor diameter of 28+++- and equipped with one 8 gr segment stone is rotated at 20.00 rpm. Then, the segment magnet is subjected to a centrifugal force of 50 kgf. On the other hand, even if synthetic resin is considered a thermosetting resin with high mechanical strength, if the rotor temperature reaches 150"C, its mechanical strength will drop to about 1/3 of that at room temperature. From these facts, Although this type of magnet is suitable for applications where the centrifugal force applied to the segment magnets is not large, it cannot be used for high-speed rotors such as the one targeted by the present invention.
実開昭５７−３４１７０号に開示されたもの（第１２図
及び第１３図）は、接着剤を用いず、しかもセグメント
磁石の仕上がり寸法のばらつきを吸収して、これを所望
位置に精度よく位置させられるかもしれないが、これも
米国特許第４，５９１．７４９号と同様、ボエステル樹
脂の機械的強度によってのみセグメント磁石を保持する
ものである。The device disclosed in Japanese Utility Model Application Publication No. 57-34170 (Figs. 12 and 13) does not use adhesive, and absorbs variations in finished dimensions of segment magnets to accurately position them at desired positions. However, like U.S. Pat. No. 4,591.749, the segment magnets are held only by the mechanical strength of the Boester resin.
特開昭６０−３５９４６号に開示されたもの（第１４図
）はミ接着剤を用いず、しかも合成樹脂の機械的強度に
頼るものでもないが、係止部材の圧入時にセグメント磁
石が破壊する慣れがある。セグメント磁石は、仕上がり
寸法のばらつきが避けられないものであり、かつ機械的
強度もそれほど大きくないことからして、大量生産にお
いて、セグメント磁石を破壊することなく係止部材を圧
入することは至難の技であろう。The method disclosed in JP-A No. 60-35946 (Fig. 14) does not use adhesive and does not rely on the mechanical strength of synthetic resin, but the segment magnet breaks when the locking member is press-fitted. I'm used to it. Segment magnets inevitably have variations in finished dimensions, and their mechanical strength is not very high, so it is extremely difficult to press-fit a locking member without destroying the segment magnets in mass production. It must be a technique.
本発明は、かかる事由に鑑みてなしたもので、その目的
とするところは、セグメント磁石の保持（固着）力を向
上させること、セグメント１石を所望位置に精度よく位
置させられること、製造工程が簡易であること等が実現
できる永久磁石回転子の提供にある。The present invention was made in view of the above circumstances, and its objectives are to improve the holding (fixing) force of segment magnets, to accurately position one segment stone at a desired position, and to improve the manufacturing process. An object of the present invention is to provide a permanent magnet rotor which can realize simple functions.
かかる課題を解決するために、本発明の永久磁石回転子
は、以下の構成にしである。In order to solve this problem, the permanent magnet rotor of the present invention has the following configuration.
請求項（１）記載の永久磁石回転子は、コークは、その
外周面に、セグメント磁石と同数でその径方向厚さに略
等しい高さの保持突起を、放射状に連設し、しかも該保
持突起の先端に幅広部を形成してなり、セグメント磁石
は、ヨークの外周面と固着突起の側面により形成される
スペースより若干小さい円弧状板に形成してなり、ヨー
クのスペースにセグメント磁石を収容した状態において
、セグメント磁石及びヨークの軸方向両外側面に、熱硬
化性樹脂の成形樹脂層を形成するとともに、該成形樹脂
層から連続した樹脂がセグメント１石とヨークの保持突
起との間にも充填されてなるものである。In the permanent magnet rotor according to claim (1), the coke has retaining protrusions radially arranged on its outer circumferential surface, the same number as the segment magnets, and having a height approximately equal to the radial thickness of the segment magnets, and A wide part is formed at the tip of the projection, and the segment magnet is formed into an arcuate plate that is slightly smaller than the space formed by the outer peripheral surface of the yoke and the side surface of the fixed projection, and the segment magnet is accommodated in the space of the yoke. In this state, a molded resin layer of thermosetting resin is formed on both outer surfaces of the segment magnet and yoke in the axial direction, and continuous resin from the molded resin layer is formed between the segment 1 stone and the holding protrusion of the yoke. It is also filled with
請求項（２）記載の永久磁石回転子は、請求項（１）記
載の永久磁石回転子のヨークに、隣合う保持突起間の略
中央付近の外周面に縦溝を形成してなり、該縦溝ととも
に、ヨークの外周面とセグメント磁石の内周面との間に
も樹脂が充填されてなるものである。In the permanent magnet rotor according to claim (2), a vertical groove is formed in the yoke of the permanent magnet rotor according to claim (1) on the outer circumferential surface of the permanent magnet rotor in the approximate center between adjacent holding protrusions. In addition to the longitudinal grooves, resin is also filled between the outer circumferential surface of the yoke and the inner circumferential surface of the segment magnet.
請求項（３）記載の永久磁石回転子は、請求項（１）又
は（２）記載のヨークに、保持突起の基部近傍の外周面
に小縦溝が形成されてなり、該小縦溝とともに、ヨーク
の外周面とセグメント磁石の内周面との間にも樹脂が充
填されてなるものである。In the permanent magnet rotor according to claim (3), the yoke according to claim (1) or (2) has a small vertical groove formed on the outer circumferential surface near the base of the holding protrusion, and together with the small vertical groove. , resin is also filled between the outer peripheral surface of the yoke and the inner peripheral surface of the segment magnet.
請求項（４）記載の永久磁石回転子は、請求項（１）記
載の永久磁石回転子の成形樹脂層が、セグメント磁石及
び保持突起の外周をも覆うように形成されてなるもので
ある。The permanent magnet rotor according to claim (4) is obtained by forming the molded resin layer of the permanent magnet rotor according to claim (1) so as to cover the outer circumferences of the segment magnets and the holding protrusions.
請求項（５）記載の永久磁石回転子は、請求項（４）記
載の永久磁石回転子に、回転子軸の貫通孔を有し、保持
突起の外径に略等しいか若干小さい外径の非磁性材料製
の円板を、セグメント［石及びヨークの軸方向両外側面
に、これらを挟むように配設してなるものである。The permanent magnet rotor according to claim (5) is the permanent magnet rotor according to claim (4), which has a through hole in the rotor shaft, and has an outer diameter that is approximately equal to or slightly smaller than the outer diameter of the holding protrusion. Discs made of non-magnetic material are arranged on both outer surfaces of the segment (stone and yoke in the axial direction) so as to sandwich them therebetween.
請求項（６）記載の永久磁石回転子は、請求項（５）記
載の永久磁石回転子の円板に、ヨークの外周より十分内
方の位置に複数の孔が、またヨークは、この孔に対応し
た貫通孔がそれぞれ形成されてなるものである。In the permanent magnet rotor according to claim (6), the disk of the permanent magnet rotor according to claim (5) has a plurality of holes at positions sufficiently inward from the outer periphery of the yoke, and the yoke has Through-holes corresponding to the two are formed respectively.
請求項（７）記載の永久磁石回転子は、請求項（１）記
載の成形樹脂層に、その軸方向外側面に、放射状に突出
するフィンを連設してなるものである。A permanent magnet rotor according to a seventh aspect of the present invention includes a molded resin layer according to a first aspect of the present invention, and radially projecting fins are continuously provided on the outer surface of the molded resin layer in the axial direction.
以下、請求項（１）、（２）及び（３）記載の発明の一
実施例を第１図乃至第３図に基づいて説明する。An embodiment of the invention according to claims (1), (2), and (3) will be described below with reference to FIGS. 1 to 3.
この永久磁石回転子１は、回転子軸２、ヨーク３、複数
（本実施例では４個）のセグメント磁石４ａ乃至４ｄ及
び熱硬化性樹脂の成形樹脂Ｎ５とから構成される。This permanent magnet rotor 1 is composed of a rotor shaft 2, a yoke 3, a plurality of (four in this embodiment) segment magnets 4a to 4d, and a molded resin N5 of thermosetting resin.
ヨーク３は、珪素鋼板のような磁性材料を打ち抜き形成
した素片３ａ ＋ ３ａ ＋−が積層されてなるもので
、具体的形状は後述するが、基本形状は円筒状をなして
いる。この積層厚は、後述するセグメントｍ石４ａ乃至
４ｄの軸方向長さと路間等とする。このヨーク３は、そ
の積層厚より長い回転子軸２に圧入され、その中間部に
固着される。The yoke 3 is formed by stacking pieces 3a + 3a +- formed by punching a magnetic material such as a silicon steel plate, and the basic shape is cylindrical, although the specific shape will be described later. This lamination thickness is determined by the axial length of the segment m stones 4a to 4d and the distance between them, which will be described later. This yoke 3 is press-fitted into the rotor shaft 2, which is longer than the laminated thickness of the yoke, and is fixed to the intermediate portion thereof.
次に、ヨーク３の具体的形状を説明する。ヨーク３の基
本形状をなす円筒部の外周面３ｂは、従来のヨークと略
同外径であって、その外周面３ｂには、セグメント磁石
４ａ乃至４ｄと同数でその径方向厚さｗに略等しい高さ
の保持突起３ｃ２乃至３ｃ４を、周方向が等間隔の放射
状に連設している。Next, the specific shape of the yoke 3 will be explained. The outer circumferential surface 3b of the cylindrical portion forming the basic shape of the yoke 3 has approximately the same outer diameter as the conventional yoke, and the outer circumferential surface 3b has the same number of segment magnets 4a to 4d and approximately the same radial thickness w as the segment magnets 4a to 4d. Holding protrusions 3c2 to 3c4 of equal height are arranged radially in a row at equal intervals in the circumferential direction.
また、保持突起３ｃｌ乃至３ｃ４は、その径方向高さの
１／２付近から先端にかけて、角度α（＝１２０°〜１
６０°）でもって広がる幅広部３ｄｌ乃至３ｄ４を有す
る。この幅広部３ｄｌ乃至３ｄ４を除（保持突起３ｃｌ
乃至３ｃ４の基部３ｅｌ乃至３ｅ４の幅は、１〜２ｍＩ
Ｉ＋程度とする。従って、外周面３ｂと、基部３ｅ１乃
至３ｅ４及び幅広部３ｄｌ乃至３ｄ４の各外周面とによ
り、大略円弧状のスペースＳ１乃至Ｓ４が形成される。Further, the holding protrusions 3cl to 3c4 have an angle α (=120° to 1
It has wide portions 3dl to 3d4 that widen at an angle of 60°. Excluding these wide parts 3dl to 3d4 (holding protrusion 3cl)
The width of the base portions 3el to 3e4 of 3c4 to 3c4 is 1 to 2 mI.
It should be about I+. Therefore, approximately arc-shaped spaces S1 to S4 are formed by the outer circumferential surface 3b and the outer circumferential surfaces of the base portions 3e1 to 3e4 and the wide portions 3dl to 3d4.
さらに、隣合う保持突起間の略中央付近の外周面３ｂに
は、半径１〜２１１ＩＩｌの半円状の縦溝３ｆｌ乃、至
３ｆ４が、保持突起の基部近傍の外周面３ｂには、半径
０．５ｍｒａ程度の小縦溝３ｇｌ乃至３ｇ４が、それぞ
れ形成されている。Further, semicircular vertical grooves 3fl to 3f4 with a radius of 1 to 211IIl are formed on the outer circumferential surface 3b near the center between adjacent holding protrusions, and semicircular longitudinal grooves 3fl to 3f4 are formed on the outer circumferential surface 3b near the base of the holding protrusions with a radius of 0. Small longitudinal grooves 3gl to 3g4 of about .5mra are formed, respectively.
セグメント磁石４ａ乃至４ｄは、軸方向長さがヨーク３
の積層厚と略同長であって、大略円弧状の各スペースｓ
ｉ乃至Ｓ４に若干小さく対応した（本実施例では、周方
向で約０．４ｎ＋ｎ＋小さい）、厚さが−の円弧状板と
なっている。従って、周方向両端の外周側は、ヨーク３
の幅広部３ｄｌ乃至３ｄ４の存在に対応する分だけ切除
された形状となる。The segment magnets 4a to 4d have an axial length equal to that of the yoke 3.
Each space s is roughly arc-shaped and has approximately the same length as the lamination thickness of
It is an arcuate plate with a negative thickness corresponding to i to S4 slightly smaller (in this embodiment, about 0.4n+n+ smaller in the circumferential direction). Therefore, the outer circumferential side of both ends in the circumferential direction is the yoke 3
The shape is cut by an amount corresponding to the existence of the wide portions 3dl to 3d4.
成形樹脂層５は、図外成形金型に、回転子軸２が固着さ
れたヨーク３を装着し、かつヨーク３のスペースＳ１乃
至Ｓ４にセグメント磁石４ａ乃至４ｄを装着し、不飽和
ポリエステル樹脂のような熱硬化性樹脂を充填する成形
加工により形成する。The molded resin layer 5 is made of unsaturated polyester resin by mounting a yoke 3 to which the rotor shaft 2 is fixed in a mold (not shown), and mounting segment magnets 4a to 4d in the spaces S1 to S4 of the yoke 3. It is formed by a molding process that fills it with a thermosetting resin.
成形金型の内径は、回転子１の外径を決めるものであっ
て、ヨーク３の固着突起３ｃｌ乃至３ｃ４の外径よりわ
ずかに大きく（本実施例では、直径約２８ｍｍとした）
、また軸方向の内法は、ヨーク３の軸方向長さより所定
寸法だけ大きくする。この所定寸法は、各側約２．５ｍ
ｍずつにしている。また、樹脂の注入口は、半径の大き
い縦溝３ｆｌ乃至３ｆ４と対応する位置に設ける。The inner diameter of the mold determines the outer diameter of the rotor 1, and is slightly larger than the outer diameter of the fixing protrusions 3cl to 3c4 of the yoke 3 (in this example, the diameter is about 28 mm).
Also, the axial inner diameter is made larger than the axial length of the yoke 3 by a predetermined dimension. This prescribed dimension is approximately 2.5m on each side.
I'm doing it in m increments. Further, resin injection ports are provided at positions corresponding to the longitudinal grooves 3fl to 3f4 having a large radius.
成形加工は、１２０ ’Ｃ乃至１３０°Ｃの温度にて溶
融状態にある樹脂が注入口から押し出され、その樹脂は
、縦溝３ｆｌ乃至３ｆ４及び小縦溝３ｇｌ乃至３ｇ４を
通り、これらと、セグメント磁石及びヨークの軸方向両
外側面と金型間に充填されることにより行われる。その
際、縦溝３ｆｌ乃至３ｆ４に充填される樹脂の圧力によ
り、セグメントｍ石４ａ乃至４ｄは、金型の内周面に当
接するよう径方向外方に押圧される。また、セグメント
磁石４ａ乃至４ｄは、周方向端面と保持突起間にも樹脂
が充填されるので、周方向においても保持突起間の略中
夫に位置することとなる。従って、セグメント磁石及び
ヨークの軸方向両外側面に、熱硬化性樹脂の成形樹脂層
５ （本実施例では、約２．５ｍｍ）が形成されるとと
もに、成形樹脂層から連続した樹脂がセグメント磁石と
ヨークの保持突起との間、さらにはヨークの外周面３ｂ
とセグメント磁石の内周面との間にも充填されるのであ
る。本実施例では、これらは、それぞれ約０．２＋ｎｏ
＋であり、また、保持突起３ｃｌ乃至３ｃ４の外周にも
、セグメント磁石の外周面と同外径の樹脂層ができる。In the molding process, resin in a molten state at a temperature of 120'C to 130°C is extruded from the injection port, and the resin passes through the vertical grooves 3fl to 3f4 and the small vertical grooves 3gl to 3g4, and is then formed into segments. This is done by filling the gap between the mold and both outer axial surfaces of the magnet and yoke. At this time, the segment m stones 4a to 4d are pressed radially outward so as to come into contact with the inner peripheral surface of the mold due to the pressure of the resin filled in the vertical grooves 3fl to 3f4. In addition, since the segment magnets 4a to 4d are also filled with resin between the circumferential end faces and the holding protrusions, they are positioned approximately in the middle between the holding protrusions in the circumferential direction as well. Therefore, a molded resin layer 5 (approximately 2.5 mm in this example) of thermosetting resin is formed on both outer surfaces of the segment magnet and yoke in the axial direction, and continuous resin from the molded resin layer forms the segment magnet. and the holding protrusion of the yoke, and furthermore, the outer peripheral surface 3b of the yoke.
and the inner peripheral surface of the segment magnet. In this example, these are each about 0.2+no
+, and a resin layer having the same outer diameter as the outer circumferential surface of the segment magnet is also formed on the outer periphery of the holding protrusions 3cl to 3c4.
この成形樹脂層５において最も重要なことは、セグメン
ト磁石とヨークの保持突起との間に樹脂が充填される点
である。次に重要なことは、ヨークの外周面３ｂとセグ
メント磁石の内周面との間にも樹脂が充填される点であ
るが、これは一つの手段であって別の手段もあり、それ
は次の実施例において説明する。The most important point in this molded resin layer 5 is that resin is filled between the segment magnets and the holding protrusions of the yoke. The next important thing is that resin is also filled between the outer circumferential surface 3b of the yoke and the inner circumferential surface of the segment magnet, but this is just one means, and there are other means as well. This will be explained in an example.
セグメント磁石４ａ乃至４ｄの着磁は、成形加工後−船
釣な着磁器により、径方向に異極が現れるように行う。The segment magnets 4a to 4d are magnetized using a magnetizer after molding so that different poles appear in the radial direction.
そして、永久磁石回転子として完成したときには、セグ
メント磁石の外表面は交互に異極が位置するものとなる
。When the permanent magnet rotor is completed, different poles are alternately located on the outer surface of the segment magnets.
かかる永久磁石回転子１は、セグメント磁石の仕上がり
寸法がある程度ばらついても、充填される樹脂の圧力に
より、それが所望位置に精度よく位置させられる。また
セグメント磁石は、充填された樹脂を介して機械的強度
の大きいヨーク３の幅広部３ｄｌ乃至３ｄ４により、十
分な保持力でもって保持される。この場合、セグメンＩ
−ｆｆｆ石に局部的に衝撃が加わることがないので、そ
れによる破壊の惧れもない。さらに、接着剤を用いない
ので、それに伴う性能低下の問題もなく、製造工程が簡
易である。In such a permanent magnet rotor 1, even if the finished dimensions of the segment magnets vary to some extent, the pressure of the filled resin allows the segment magnets to be accurately positioned at desired positions. Further, the segment magnets are held with sufficient holding force by the wide portions 3dl to 3d4 of the yoke 3, which have high mechanical strength, through the filled resin. In this case, segment I
-fff Since no local impact is applied to the stone, there is no fear of damage caused by it. Furthermore, since no adhesive is used, there is no problem of performance deterioration associated with it, and the manufacturing process is simple.
なお、ヨーク３に設けた縦溝３ｆｌ乃至３ｆ４の半径は
かなり大きいが、隣合う保持突起間の略中夫に位置して
いるため、セグメント磁石とヨークにより磁気回路を形
成する際、磁気的損失に対する影響は少ない。また、小
縦溝３ｇｌ乃至３ｇ４は、保持突起の基部３ｅｌ乃至３
ｅ４の幅を小さくするものではないので、これの強度低
下に対する影響も少ない。Note that although the radius of the vertical grooves 3fl to 3f4 provided in the yoke 3 is quite large, since they are located approximately in the middle between adjacent holding protrusions, when forming a magnetic circuit with the segment magnet and the yoke, magnetic loss may occur. There is little impact on Further, the small longitudinal grooves 3gl to 3g4 are formed at the bases 3el to 3 of the holding projections.
Since the width of e4 is not made small, the influence of this on the strength reduction is small.
次に、請求項（１）、（４）、（５）及び（６）に記載
の発明の一実施例を、第４図乃至第６図に基づいて説明
する。この永久磁石回転子■１の回転子軸とセグメント
磁石は、先の実施例と同様であるので、これらには、同
一の符号を付して説明を省略する。Next, an embodiment of the invention according to claims (1), (4), (5), and (6) will be described based on FIGS. 4 to 6. Since the rotor shaft and segment magnets of this permanent magnet rotor (1) are the same as those in the previous embodiment, they will be given the same reference numerals and a description thereof will be omitted.
ヨーク１３は、これも基本的には、先の実施例のヨーク
３に１（）２している。すなわちヨーク１３は、素片１
３ａ、１３ａ、・−が積層されてなるものであり、回転
子軸２に圧入され、その中間部に固着される。The yoke 13 is also basically the same as the yoke 3 of the previous embodiment. That is, the yoke 13 is
3a, 13a, .
また、外周面１３ｂには、やはり幅広部１３ｄｌ乃至１
３ｄ４と基部１３ｅ１乃至１３ｅ４を有する保持突起１
３ｃ１乃至１３ｃ４が連設され、従って大略円弧状のス
ペースＳＳｌ乃至ＳＳ４ も形成されている。Further, the outer circumferential surface 13b also has wide portions 13dl to 1
3d4 and a holding protrusion 1 having base parts 13e1 to 13e4
3c1 to 13c4 are arranged in series, and therefore roughly arc-shaped spaces SS1 to SS4 are also formed.
しかしながら、その外周面１３ｂには、縦溝及び小縦溝
が形成されていない。そして、外周面１３ｂより十分内
方の位置に複数（本実施例では、４個）の貫通孔１３ｈ
、 １３ｈ、〜が設けられている。However, no vertical grooves or small vertical grooves are formed on the outer circumferential surface 13b. A plurality of (four in this embodiment) through holes 13h are provided at positions sufficiently inward from the outer circumferential surface 13b.
, 13h, ~ are provided.
成形樹脂層１５も、基本的には、先の実施例の成形樹脂
Ｎ５に類似している。すなわち図外成形金型に、回転子
軸２が固着されたヨーク１３を装着し、かつヨーク１３
のスペースＳＳ１乃至ＳＳ４にセグメント磁石１４ａ乃
至１４ｄを装着し、不飽和ポリエステル樹脂のような熱
硬化性樹脂を充填する成形加工により形成する。The molded resin layer 15 is also basically similar to the molded resin N5 of the previous embodiment. That is, the yoke 13 to which the rotor shaft 2 is fixed is mounted on a molding die (not shown), and the yoke 13 is
The segment magnets 14a to 14d are attached to the spaces SS1 to SS4, and formed by a molding process in which the segments are filled with a thermosetting resin such as unsaturated polyester resin.
しかしながら、成形金型の軸方向の内法は、先の実施例
よりもやや大きく （本実施例では、両側約２ｆｆｉＩ
Ｉ＋づつ計約４１）シである。これは、成形加工の際に
、回転子軸２の貫通孔１６ａを有し、保持突起の外径よ
り若干小さい外径（本実施例では、直径約２６＋ｎ＋）
の非磁性材料製の円板１６を、セグメント磁石及びヨー
クの軸方向両外側面に、これらを挟むように配設するた
めである。この円板１６は、本実施例では、可塑状態に
なるのが約１５０°Ｃであるガラス繊維入りナイロン樹
脂製であって、板厚が２ｍｍにしである。また円板１６
には、ヨークを挟むように配設したとき、ヨークの貫通
孔１３ｈ、 １３ｈ、・・・に連通する孔１６ｂ、 １
６ｂ、−が設けである。However, the internal diameter of the mold in the axial direction is slightly larger than that of the previous example (in this example, approximately 2ffiI on both sides).
I + each, totaling about 41) C. This has a through hole 16a of the rotor shaft 2 during molding, and has an outer diameter slightly smaller than the outer diameter of the holding protrusion (in this example, the diameter is approximately 26+n+).
This is because the discs 16 made of a non-magnetic material are disposed on both outer surfaces of the segment magnet and yoke in the axial direction so as to sandwich them therebetween. In this embodiment, the disk 16 is made of glass fiber-filled nylon resin that becomes plastic at about 150° C., and has a thickness of 2 mm. Also, disk 16
When the holes 16b and 1 are arranged to sandwich the yoke, they communicate with the through holes 13h, 13h, . . . of the yoke.
6b, - is provided.
なお、円板１６の材料として、アルミニュウム板やステ
ンレス鋼板を用いてもよく、その場合は外形を保持突起
の外径に略等しく、また板厚を０．５ＩＩＩＩ１１程度
にして、成形金型の軸方向の内法を対応させる。Note that an aluminum plate or a stainless steel plate may be used as the material for the disc 16. In that case, the outer diameter is approximately equal to the outer diameter of the holding protrusion, and the plate thickness is approximately 0.5III11, so that the axis of the molding die is Match the inner laws of direction.
成形加工における溶融状態の樹脂は、円板１６に規制さ
れて、大きくは二つの流れになって間隙を充填していく
。一つの流れは、円板１６の外周を越え、セグメント１
石の外周面と金型の内周面間を通り、これによりセグメ
ント磁石は、その内周面がヨークの外周面１３ｂに当接
するよう径方向内方に押圧される。同時に、この樹脂は
、セグメント磁石の周方向端面と保持突起間にも流れ込
み、従ってセグメント磁石１４ａ乃至１４ｄは、周方向
において、保持突起間の略中夫に位置する。もう一つの
流れは、円板１６の孔１６ｂ、 １６ｂ、−・とヨーク
の貫通孔１３ｈ、１３ｈ、−・−を流れる。従って、セ
グメント磁石及びヨークの軸方向両外側面に、熱硬化性
樹脂の成形樹脂層１５（本実施例では、約４．５ｍｍ）
が形成されるとともに、連続してセグメント磁石及びヨ
ークの保持突起の外周をも覆い（本実施例では、約０．
２ｍａ＋） 、さらに成形樹脂層１５から連続した樹脂
がセグメント１石とヨークの保持突起間と、孔１６ｂ、
１６ｂ、・−・及び貫通孔１３ｈ、１３ｈ、−にも充
填されるのである
この成形樹脂層１５において最も重要なことは、セグメ
ント樹脂と保持突起との間に樹脂が充填されることであ
る。次に重要なことは、セグメント磁石及びヨークの保
持突起の外周を覆うことであり、これは先の実施例に対
する別の手段である。The resin in the molten state during the molding process is regulated by the disk 16 and flows into two main flows to fill the gap. One flow passes over the outer circumference of disk 16 and passes through segment 1.
It passes between the outer circumferential surface of the stone and the inner circumferential surface of the mold, whereby the segment magnet is pressed radially inward so that its inner circumferential surface abuts the outer circumferential surface 13b of the yoke. At the same time, this resin also flows between the circumferential end faces of the segment magnets and the holding protrusions, so that the segment magnets 14a to 14d are located approximately at the center between the holding protrusions in the circumferential direction. The other flow flows through the holes 16b, 16b, -- of the disk 16 and the through holes 13h, 13h, -- of the yoke. Therefore, molded resin layers 15 (about 4.5 mm in this example) of thermosetting resin are provided on both outer surfaces of the segment magnet and yoke in the axial direction.
is formed and continuously covers the outer periphery of the segment magnet and the holding protrusion of the yoke (in this example, approximately 0.0 mm is formed).
2ma+), and the continuous resin from the molded resin layer 15 is applied between the segment 1 stone and the holding protrusion of the yoke, and the hole 16b.
16b, . . . and the through holes 13h, 13h, -.The most important thing in this molded resin layer 15 is that the resin is filled between the segment resin and the holding protrusion. The next important thing is to cover the outer periphery of the segment magnets and the retaining protrusions of the yoke, which is an alternative to the previous embodiments.
かかる永久磁石回転子１２は、先の実施例と同様の作用
効果を奏するうえに、セグメント磁石及びヨークの保持
突起の外周を樹脂が覆うことにより、セグメント磁石の
より確実な保護が図れる。また、円板１６を配設するこ
とにより、外周を覆う樹脂の充填がより確実に行われる
。また、ヨーク１３と円板１６に貫通孔と孔を設けたこ
とにより、樹脂の流れがより円滑となり、成形樹脂層１
５全体の機械的強度をより大きくすることができる。This permanent magnet rotor 12 not only provides the same effects as those of the previous embodiment, but also provides more reliable protection of the segment magnets by covering the outer circumferences of the segment magnets and the retaining protrusions of the yoke with resin. Further, by disposing the disk 16, filling of the resin covering the outer periphery can be performed more reliably. In addition, by providing through holes and holes in the yoke 13 and the disk 16, the flow of resin becomes smoother, and the molded resin layer 1
5. The mechanical strength of the entire device can be further increased.
次に、請求項（１）及び（７）に記載の発明の一実施例
を、第７図に基づいて説明する。この永久磁石回転子２
１は、先の二つの実施例のいずれにも適用可能な応用例
であるが、ここでは、最初の実施例の応用例として説明
する。このものは、成形樹脂層の構造のみが異なるので
、その他の部材には最初の実施例と同一の符号を付して
説明を省略する。Next, an embodiment of the invention according to claims (1) and (7) will be described based on FIG. 7. This permanent magnet rotor 2
1 is an application example that can be applied to either of the previous two embodiments, but here it will be explained as an application example of the first embodiment. Since this embodiment differs only in the structure of the molded resin layer, the other members are given the same reference numerals as in the first embodiment and their explanation will be omitted.
この成形樹脂層２５は、その軸方向外側面に、放射状に
突出する複数（本実施例では、４個）のフィン２５ａ
、 ２５ａ 、・・−を連設している。またフィン２５
ａ。This molded resin layer 25 has a plurality of (four in this embodiment) radially projecting fins 25a on its axially outer surface.
, 25a, . . . - are provided in series. Also fin 25
a.
２５ｈ間のなるべく外方に凹所２５ｂ、２５ｂ、・−が
設けである。この凹所２５ｂ、２５ｂ、・・・には、回
転子全体の重量バランス調整の必要が生じた際、バラン
ス調整パテ２７を付加できるようにするものである。Recesses 25b, 25b, . . . are provided as far outwardly as possible between 25h. When it becomes necessary to adjust the weight balance of the entire rotor, balance adjustment putty 27 can be added to the recesses 25b, 25b, . . . .
かかる永久磁石回転子２１は、自らの回転により風を発
生させて冷却作用を奏することができる。The permanent magnet rotor 21 can generate wind through its own rotation, thereby exerting a cooling effect.
また回転子全体の重量バランス調整が必要になったとき
、容易にそれを行うことができる。Furthermore, when it becomes necessary to adjust the weight balance of the entire rotor, it can be easily done.
〔発明の効果〕゛
本発明の永久磁石回転子は、以下のような効果を奏する
。[Effects of the Invention] The permanent magnet rotor of the present invention has the following effects.
請求項（１）記載のものは、セグメント磁石の仕上がり
寸法がある程度ばらついても、充填される樹脂の圧力に
より、それが所望位置に精度よく位置させられる。また
セグメント磁石は、充填された樹脂を介して機械的強度
の大きいヨークに設けた保持突起の幅広部により、十分
な保持力でもって保持される。この場合、セグメント磁
石に局部的に衝撃が加わることがないので、それによる
破壊の惧れもない。さらに、接着剤を用いないので、そ
れに伴う性能低下の問題もなく、製造工程が簡易である
。According to the structure described in claim (1), even if the finished dimensions of the segment magnets vary to some extent, the pressure of the filled resin allows the segment magnets to be accurately positioned at desired positions. Further, the segment magnet is held with sufficient holding force by the wide portion of the holding protrusion provided on the yoke having high mechanical strength through the filled resin. In this case, since no local impact is applied to the segment magnets, there is no risk of destruction due to this. Furthermore, since no adhesive is used, there is no problem of performance deterioration associated with it, and the manufacturing process is simple.
請求項（２）記載のものは、請求項（１）のものと同様
の効果を奏するうえに、縦溝に充填される樹脂の圧力に
より、セグメント磁石がより確実に所望位置に位置させ
られる。The structure described in claim (2) not only provides the same effect as the structure described in claim (1), but also allows the segment magnets to be positioned at desired positions more reliably due to the pressure of the resin filled in the vertical grooves.
請求項（３）記載のものは、さらに、小縦溝が存在する
ことにより、セグメント磁石と保持突起間の樹脂の充填
がより確実に行われる。In the structure according to claim (3), the presence of the small longitudinal grooves makes it possible to more reliably fill the space between the segment magnet and the holding protrusion with the resin.
請求項（４）記載のものは、請求項（１）のものと同様
の効果を奏するうえに、成形樹脂層がセグメント磁石と
ヨークの外周を覆うので、セグメント１石がより確実に
保護できる。The structure described in claim (4) provides the same effect as the structure described in claim (1), and since the molded resin layer covers the outer periphery of the segment magnet and the yoke, each segment stone can be more reliably protected.
請求項（５）記載のものは、さらに、円板を配設したこ
とにより、成形樹脂層がセグメント磁石とヨークの外周
を覆わせるに際し、樹脂の流れを特徴とする
請求項（６）記載のものは、さらに、樹脂の流れをより
確実にするとともに、成形樹脂層全体の強度を大きくす
ることができる。The device according to claim (5) is further characterized in that the resin flows when the molded resin layer covers the outer periphery of the segment magnet and the yoke by disposing the disk. Furthermore, the flow of the resin can be made more reliable, and the strength of the entire molded resin layer can be increased.
請求項（７）記載のものは、これまでに述べた全ての効
果を奏するうえに、成形樹脂層にフィンを設けたことに
より、自らの回転により風を発生させて冷却作用を奏す
る。The device described in claim (7) not only provides all the effects described above, but also has fins provided in the molded resin layer to generate wind through its own rotation, thereby providing a cooling effect.
第１図は、第１の実施例を示す部分的に切り欠い斜視図
、
第２図は、その横断面図、
第３図は、その分解斜視図、
第４図は、第２の実施例を示す部分的に切り欠い斜視図
、
第５図は、その横断面図、
第６図は、その分、解斜視図、
第７図は、第３の実施例を示す斜視図、第８図は、従来
の一般的な例を示す斜視図、第９図は、第１の従来例の
斜視図、
第１０図は、その平面図、
第１１図は、第２の従来例の分解側面図、第１２図は、
第３の従来例の斜視図、
第１３図は、その断面図、
第１４図は、第４の従来例の平面図である。
１．１１．２１ −・−永久磁石回転子、２ −・
・回転子軸、
３．１３ ・−ヨーク、
３ｂ １３ｂ ・−外周面、３ｃｌ
〜３ｃ４．１３ｃｌ〜１３ｃ４−固着突起、３ｆｌ〜３
ｆ４ −・・縦溝、３ｇ１〜３ｇｆｉ−小縦
溝、
Ｓ１〜Ｓ４． ＳＳＩ〜ＳＳ、ｔ−・スペース、４
ａ〜４ｄ−・・セグメント磁石、
５．１５．２５ ・−・成形樹脂層、２５ａ 、 ２
５ａ 、・−・ −・フィン、１６
・−円板。
第１図FIG. 1 is a partially cutaway perspective view showing the first embodiment, FIG. 2 is a cross-sectional view thereof, FIG. 3 is an exploded perspective view thereof, and FIG. 4 is a second embodiment. FIG. 5 is a cross-sectional view thereof, FIG. 6 is an exploded perspective view thereof, FIG. 7 is a perspective view showing the third embodiment, and FIG. 8 is a partially cutaway perspective view showing the third embodiment. 9 is a perspective view of the first conventional example, FIG. 10 is a plan view thereof, and FIG. 11 is an exploded side view of the second conventional example. , Figure 12 is
FIG. 13 is a perspective view of the third conventional example, FIG. 13 is a sectional view thereof, and FIG. 14 is a plan view of the fourth conventional example. 1.11.21 --- Permanent magnet rotor, 2 ---
・Rotor shaft, 3.13 ・-Yoke, 3b 13b ・-Outer peripheral surface, 3cl
~3c4.13cl~13c4-fixation protrusion, 3fl~3
f4--Vertical groove, 3g1-3gfi-Small vertical groove, S1-S4. SSI~SS, t-space, 4
a to 4d--Segment magnet, 5.15.25--Molded resin layer, 25a, 2
5a,...--fin, 16
・-Disc. Figure 1
Claims (7)
料製のヨークと、ヨークの外周に固着される複数個のセ
グメント磁石と、からなる永久磁石回転子において、 前記ヨークは、その外周面に、セグメント磁石と同数で
その径方向厚さに略等しい高さの保持突起を放射状に連
設し、しかも該固着突起の先端に幅広部を形成してなり
、 前記セグメント磁石は、ヨークの外周面と保持突起の側
面により形成されるスペースより若干小さい円弧状板に
形成してなり、 前記ヨークのスペースに前記セグメント磁石を収容した
状態において、セグメント磁石及びヨークの軸方向両外
側面に、熱硬化性樹脂の成形樹脂層を形成するとともに
、該成形樹脂層から連続した樹脂がセグメント磁石とヨ
ークの保持突起との間にも充填されてなる永久磁石回転
子。(1) A permanent magnet rotor comprising a rotor shaft, a yoke made of a magnetic material fixed to the outer periphery of the rotor shaft, and a plurality of segment magnets fixed to the outer periphery of the yoke, the yoke comprising: Holding projections having the same number of segment magnets and a height approximately equal to the radial thickness of the segment magnets are arranged radially on the outer peripheral surface thereof, and a wide portion is formed at the tip of the fixing projections, and the segment magnets include: It is formed into an arcuate plate that is slightly smaller than the space formed by the outer peripheral surface of the yoke and the side surface of the holding protrusion, and when the segment magnet is accommodated in the space of the yoke, both outer surfaces of the segment magnet and the yoke in the axial direction A permanent magnet rotor in which a molded resin layer of thermosetting resin is formed, and a continuous resin from the molded resin layer is also filled between the segment magnets and the holding protrusions of the yoke.
外周面に縦溝を形成してなり、該縦溝とともに、ヨーク
の外周面とセグメント磁石の内周面との間にも樹脂が充
填されてなる請求項（１）記載の永久磁石回転子。(2) The yoke has a vertical groove formed on its outer circumferential surface approximately in the center between adjacent holding protrusions, and along with the longitudinal groove, a resin is also formed between the outer circumferential surface of the yoke and the inner circumferential surface of the segment magnet. The permanent magnet rotor according to claim 1, wherein the permanent magnet rotor is filled with.
縦溝を形成してなり、該小縦溝とともに、ヨークの外周
面とセグメント磁石の内周面との間にも樹脂が充填され
てなる請求項（１）又は（２）記載の永久磁石回転子。(3) The yoke has a small vertical groove formed on the outer peripheral surface near the base of the holding protrusion, and resin is filled between the outer peripheral surface of the yoke and the inner peripheral surface of the segment magnet together with the small vertical groove. A permanent magnet rotor according to claim 1 or 2, wherein the permanent magnet rotor is made of:
の外周をも覆うように形成してなる請求項（１）記載の
永久磁石回転子。(4) The permanent magnet rotor according to claim 1, wherein the molded resin layer is formed so as to cover the outer circumferences of the segment magnets and the holding protrusions.
しいか若干小さい外径の非磁性材料製の円板を、前記セ
グメント磁石及びヨークの軸方向両外側面に、これらを
挟むように配設してなる請求項（４）記載の永久磁石回
転子。(5) A disc made of a non-magnetic material having a through hole of the rotor shaft and having an outer diameter approximately equal to or slightly smaller than the outer diameter of the holding protrusion is attached to both axially outer surfaces of the segment magnet and yoke. The permanent magnet rotor according to claim 4, wherein the permanent magnet rotor is arranged so as to sandwich the permanent magnet rotor.
複数の孔が、前記ヨークは、この孔に対応した貫通孔が
それぞれ形成されてなる請求項（５）記載の永久磁石回
転子。(6) The permanent magnet rotation according to claim (5), wherein the disk has a plurality of holes located sufficiently inward from the outer periphery of the yoke, and the yoke has through holes corresponding to the holes. Child.
に突出するフィンを連設してなる請求項（１）記載の永
久磁石回転子。(7) The permanent magnet rotor according to claim (1), wherein the molded resin layer has radially projecting fins arranged on its axially outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1071010A JPH0284032A (en) | 1988-04-25 | 1989-03-22 | Permanent magnet rotor |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10178888 | 1988-04-25 | ||
| JP63-101788 | 1988-04-25 | ||
| JP63-158461 | 1988-06-27 | ||
| JP1071010A JPH0284032A (en) | 1988-04-25 | 1989-03-22 | Permanent magnet rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0284032A true JPH0284032A (en) | 1990-03-26 |
Family
ID=26412122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1071010A Pending JPH0284032A (en) | 1988-04-25 | 1989-03-22 | Permanent magnet rotor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0284032A (en) |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05246497A (en) * | 1992-02-28 | 1993-09-24 | Sharp Corp | Oil supplying controller |
| JPH062976U (en) * | 1992-05-30 | 1994-01-14 | 愛知電機株式会社 | Plastic magnet rotor |
| JP2748694B2 (en) * | 1992-08-12 | 1998-05-13 | セイコーエプソン株式会社 | Permanent magnet rotor of brushless motor and method of manufacturing the same |
| WO1998037611A2 (en) * | 1997-02-21 | 1998-08-27 | Emerson Electric Co. | Rotor assembly for a rotating machine |
| JP2001169485A (en) * | 1999-12-07 | 2001-06-22 | Honda Motor Co Ltd | Permanent magnet system of motor, and method of fixing permanent magnet |
| JP2001309588A (en) * | 2000-04-20 | 2001-11-02 | Matsushita Electric Ind Co Ltd | Rotor of motor |
| US6489696B2 (en) * | 1999-05-13 | 2002-12-03 | Matsushita Electric Industrial Co., Ltd. | Motor having rotor formed by using thermosetting resin |
| JP2005522976A (en) * | 2002-04-12 | 2005-07-28 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Rotor for electrical machine |
| JP2005287138A (en) * | 2004-03-29 | 2005-10-13 | Kyosho Cho | Structure of motor rotor |
| JP2006333544A (en) * | 2005-05-23 | 2006-12-07 | Daikin Ind Ltd | Rotor, motor, compressor, blower, and air conditioner |
| JP2007174840A (en) * | 2005-12-22 | 2007-07-05 | Nidec Shibaura Corp | Rotor |
| JP2009027768A (en) * | 2007-07-17 | 2009-02-05 | Kayaba Ind Co Ltd | Permanent magnet synchronous motor |
| US7888835B2 (en) * | 2007-07-13 | 2011-02-15 | System General Corporation | Rotating shaft and motor rotor having the same |
| JP2011055687A (en) * | 2009-09-04 | 2011-03-17 | Mitsui High Tec Inc | Method for manufacturing laminated core of rotor |
| US8562314B2 (en) | 2009-11-19 | 2013-10-22 | Hyundai Motor Company | Electric water pump |
| JP2013223407A (en) * | 2012-04-19 | 2013-10-28 | Fuji Electric Co Ltd | Rotor of magnet-embedded permanent magnet rotary electric machine |
| US8747082B2 (en) | 2009-11-19 | 2014-06-10 | Hyundai Motor Company | Electric water pump |
| US8839503B2 (en) | 2009-11-19 | 2014-09-23 | Hyundai Motor Company | Method for manufacturing stator for electric water pump |
| US8961154B2 (en) | 2009-11-19 | 2015-02-24 | Hyundai Motor Company | Electric water pump |
| JP2015050880A (en) * | 2013-09-03 | 2015-03-16 | アイシン精機株式会社 | Electric motor |
| KR20150086484A (en) * | 2012-11-23 | 2015-07-28 | 콘티넨탈 오토모티브 게엠베하 | Rotor of an electric motor and method for producing the rotor |
| JP2017046449A (en) * | 2015-08-26 | 2017-03-02 | パナソニックＩｐマネジメント株式会社 | Manufacturing method for motor, rotor |
| JP2018074765A (en) * | 2016-10-31 | 2018-05-10 | パナソニックＩｐマネジメント株式会社 | Electric motor |
| JP2019115255A (en) * | 2017-12-20 | 2019-07-11 | アーベーベー・シュバイツ・アーゲー | Balance adjustment/fixing of rotor by injection molding or compression molding |
| CN112583162A (en) * | 2019-09-30 | 2021-03-30 | 日本电产株式会社 | Holder, rotor, motor, and method for manufacturing rotor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05246497A (en) * | 1992-02-28 | 1993-09-24 | Sharp Corp | Oil supplying controller |
| JPH062976U (en) * | 1992-05-30 | 1994-01-14 | 愛知電機株式会社 | Plastic magnet rotor |
| JP2748694B2 (en) * | 1992-08-12 | 1998-05-13 | セイコーエプソン株式会社 | Permanent magnet rotor of brushless motor and method of manufacturing the same |
| US6324745B1 (en) | 1997-02-21 | 2001-12-04 | Emerson Electric Co. | Method of assembling a rotor assembly for a rotating machine |
| WO1998037611A3 (en) * | 1997-02-21 | 1998-11-19 | Emerson Electric Co | Rotor assembly for a rotating machine |
| US6078121A (en) * | 1997-02-21 | 2000-06-20 | Emerson Electric Co. | Rotor assembly for a rotating machine |
| WO1998037611A2 (en) * | 1997-02-21 | 1998-08-27 | Emerson Electric Co. | Rotor assembly for a rotating machine |
| US6489696B2 (en) * | 1999-05-13 | 2002-12-03 | Matsushita Electric Industrial Co., Ltd. | Motor having rotor formed by using thermosetting resin |
| JP2001169485A (en) * | 1999-12-07 | 2001-06-22 | Honda Motor Co Ltd | Permanent magnet system of motor, and method of fixing permanent magnet |
| JP2001309588A (en) * | 2000-04-20 | 2001-11-02 | Matsushita Electric Ind Co Ltd | Rotor of motor |
| JP2005522976A (en) * | 2002-04-12 | 2005-07-28 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Rotor for electrical machine |
| JP2005287138A (en) * | 2004-03-29 | 2005-10-13 | Kyosho Cho | Structure of motor rotor |
| JP2006333544A (en) * | 2005-05-23 | 2006-12-07 | Daikin Ind Ltd | Rotor, motor, compressor, blower, and air conditioner |
| JP2007174840A (en) * | 2005-12-22 | 2007-07-05 | Nidec Shibaura Corp | Rotor |
| US7888835B2 (en) * | 2007-07-13 | 2011-02-15 | System General Corporation | Rotating shaft and motor rotor having the same |
| JP2009027768A (en) * | 2007-07-17 | 2009-02-05 | Kayaba Ind Co Ltd | Permanent magnet synchronous motor |
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| US8747082B2 (en) | 2009-11-19 | 2014-06-10 | Hyundai Motor Company | Electric water pump |
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| US8961154B2 (en) | 2009-11-19 | 2015-02-24 | Hyundai Motor Company | Electric water pump |
| JP2013223407A (en) * | 2012-04-19 | 2013-10-28 | Fuji Electric Co Ltd | Rotor of magnet-embedded permanent magnet rotary electric machine |
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| JP2016502389A (en) * | 2012-11-23 | 2016-01-21 | コンチネンタル オートモーティヴ ゲゼルシャフト ミット ベシュレンクテル ハフツングＣｏｎｔｉｎｅｎｔａｌ Ａｕｔｏｍｏｔｉｖｅ ＧｍｂＨ | Rotor for electric motor and method for manufacturing the rotor |
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| JP2018074765A (en) * | 2016-10-31 | 2018-05-10 | パナソニックＩｐマネジメント株式会社 | Electric motor |
| CN108023418A (en) * | 2016-10-31 | 2018-05-11 | 松下知识产权经营株式会社 | Motor |
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