JPH054740U - Permanent magnet rotor - Google Patents
Permanent magnet rotorInfo
- Publication number
- JPH054740U JPH054740U JP5130291U JP5130291U JPH054740U JP H054740 U JPH054740 U JP H054740U JP 5130291 U JP5130291 U JP 5130291U JP 5130291 U JP5130291 U JP 5130291U JP H054740 U JPH054740 U JP H054740U
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- rotor
- yoke
- magnet rotor
- peripheral surface
- 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
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
(57)【要約】
【目的】 永久磁石回転子自体の重心位置を偏位させる
ことにより、被駆動物の荷重の偏位による振動を打ち消
し、界磁用永久磁石片が飛散することを防止でき、か
つ、製造が容易な永久磁石回転子を提供する。
【構成】 多数の鋼板２を積層してヨーク３を形成し、
このヨーク３の外周面に界磁用永久磁石４を固着した永
久磁石回転子１において、前記ヨーク３の少なくとも一
部は、大径部Ｌと小径部Ｓとを有する偏心鋼板２ａを積
層した偏心ヨーク部３ａからなり、この偏心ヨーク部３
ａの小径部Ｓの外周面に第１の永久磁石片４a を装着
し、大径部Ｌの外周面に第１の永久磁石片の外周面と面
一になるような厚さに形成した第２の永久磁石片４b を
装着した。
(57) [Abstract] [Purpose] By displacing the center of gravity of the permanent magnet rotor itself, it is possible to cancel the vibration due to the deviation of the load of the driven object and prevent the permanent magnet pieces for field magnet from scattering. And a permanent magnet rotor that is easy to manufacture. [Structure] A large number of steel plates 2 are laminated to form a yoke 3,
In the permanent magnet rotor 1 in which the field permanent magnet 4 is fixed to the outer peripheral surface of the yoke 3, at least a part of the yoke 3 is an eccentric steel plate 2a having a large-diameter portion L and a small-diameter portion S laminated. The eccentric yoke portion 3 is composed of a yoke portion 3a.
The first permanent magnet piece 4 a was attached to the outer peripheral surface of the small diameter portion S of a, and the outer peripheral surface of the large diameter portion L was formed to have a thickness flush with the outer peripheral surface of the first permanent magnet piece. The second permanent magnet piece 4b was attached.
Description
【０００１】[0001]
本考案は複数の永久磁石片を有する永久磁石回転子に関する。 The present invention relates to a permanent magnet rotor having a plurality of permanent magnet pieces.
【０００２】[0002]
一般に重心位置が回転中心から偏位している物を駆動するモータの永久磁石回 転子として、回転子の一部にその被駆動物の偏心荷重による振動を打ち消すバラ ンスウェイトを設けた永久磁石回転子が知られている。 図４は上記バランスウェイトを設けた従来の永久磁石回転子を用いた密閉型電 動圧縮機の全体を示している。密閉型電動圧縮機５１は密閉容器５２を有し、こ の密閉容器５２の内部には駆動装置５３と圧縮装置５４とが上下直列的に配設さ れている。 駆動装置５３は固定子５５と永久磁石回転子５６とからなる。固定子５５は固 定子鉄心５７と固定子コイル５８とから構成され、密閉容器５２の内周面に固定 されている。永久磁石回転子５６は、前記固定子５５の内側の空間に回転自在に 支承され、鋼板５９を積層したヨーク６０の外周面に界磁用永久磁石片６１を固 着して形成されている。ヨーク６０の中心部には回転軸６２が圧入され、永久磁 石回転子５６と回転軸６２とが一体に回転するように構成されている。回転軸 ６２の下端は前記圧縮装置５４の偏心ロータ６３に一体に連結されている。 圧縮装置５４は前記偏心ロータ６３と、シリンダ６４と、シリンダ６４の上下 端を密封するシリンダカバー６５と、ベーン６６と、ベーン６６を付勢するばね ６７とから構成されている。 上記構造の密閉型電動圧縮機５１が作動するときは、永久磁石回転子５６は回 転して偏心ロータ６３を偏心的に回転駆動する。偏心ロータ６３を偏心的に回転 駆動することにより、偏心ロータ６３の不釣り合いな荷重によって偏心ロータ ６３を含めた永久磁石回転子５６の系全体で振動が増幅され、部分的に大きな振 動を生じる。 上記の振動を打ち消すために、この従来の永久磁石回転子５６では、回転子の 上下端面に補強用サイドカバー６８を取り付け、この補強用サイドカバー６８に おもり６９を取り付けている。このおもり６９の不釣り合いな荷重によって偏心 ロータ６３の不釣り合いな荷重が打ち消され、振動の増幅が防止される。補強用 サイドカバー６８を設けている理由は、永久磁石片６１は強度が小さく、これに おもり６９を直接取り付けた場合、永久磁石片６１が破損するからである。 Generally, as a permanent magnet rotor of a motor that drives an object whose center of gravity is deviated from the center of rotation, a permanent magnet is provided in a part of the rotor with a balance weight to cancel the vibration of the driven object due to the eccentric load. The rotor is known. FIG. 4 shows the whole of a hermetic type electric compressor using a conventional permanent magnet rotor provided with the above balance weight. The hermetic electric compressor 51 has a hermetic container 52, and inside the hermetic container 52, a driving device 53 and a compressing device 54 are vertically arranged in series. The drive device 53 includes a stator 55 and a permanent magnet rotor 56. The stator 55 is composed of a stator core 57 and a stator coil 58, and is fixed to the inner peripheral surface of the closed container 52. The permanent magnet rotor 56 is rotatably supported in a space inside the stator 55, and is formed by fixing a field permanent magnet piece 61 to the outer peripheral surface of a yoke 60 in which steel plates 59 are laminated. A rotary shaft 62 is press-fitted in the center of the yoke 60 so that the permanent magnet rotor 56 and the rotary shaft 62 rotate integrally. The lower end of the rotary shaft 62 is integrally connected to the eccentric rotor 63 of the compression device 54. The compression device 54 includes the eccentric rotor 63, a cylinder 64, a cylinder cover 65 that seals the upper and lower ends of the cylinder 64, a vane 66, and a spring 67 that biases the vane 66. When the hermetic electric compressor 51 having the above structure operates, the permanent magnet rotor 56 rotates to eccentrically rotate the eccentric rotor 63. By eccentrically rotating and driving the eccentric rotor 63, the unbalanced load of the eccentric rotor 63 amplifies the vibration in the entire system of the permanent magnet rotor 56 including the eccentric rotor 63, resulting in a partial large vibration. .. In order to cancel the above vibration, in this conventional permanent magnet rotor 56, a reinforcing side cover 68 is attached to the upper and lower end surfaces of the rotor, and a weight 69 is attached to the reinforcing side cover 68. The unbalanced load of the weight 69 cancels out the unbalanced load of the eccentric rotor 63 and prevents the amplification of vibration. The reinforcing side cover 68 is provided because the permanent magnet piece 61 has low strength, and if the weight 69 is directly attached to the permanent magnet piece 61, the permanent magnet piece 61 is damaged.
【０００３】 図４と同一部分に同一符号を付した図５は、他の従来の永久磁石回転子を用い た密閉型電動圧縮機を示している。この従来の永久磁石回転子５６は、バランス ウェイトとしておもり６９を用いる代りに、互いに対向する一対の界磁用永久磁 石片６１の上端と下端を延長させ、永久磁石回転子５６の両端面から突出させて いる。この従来の永久磁石回転子５６は、永久磁石片６１の前記突出部による不 釣り合いな荷重によって偏心ロータ６３の不釣り合いな荷重を打ち消している。FIG. 5, in which the same parts as those in FIG. 4 are designated by the same reference numerals, shows a hermetic electric compressor using another conventional permanent magnet rotor. In this conventional permanent magnet rotor 56, instead of using the weight 69 as a balance weight, the upper end and the lower end of a pair of permanent magnet pieces 61 for field magnets extending from each other are extended so as to extend from both end surfaces of the permanent magnet rotor 56. It is protruding. In this conventional permanent magnet rotor 56, the unbalanced load of the eccentric rotor 63 is canceled by the unbalanced load of the protrusion of the permanent magnet piece 61.
【０００４】 図４と同一部分に同一符号を付した図６は、さらに他の従来の永久磁石回転子 を用いた密閉型電動圧縮機を示している。この従来の永久磁石回転子５６は、バ ランスウェイトとしておもり６９を用いる代りに、互いに対向する一対の界磁用 永久磁石片６１の上端と下端を短縮し、永久磁石回転子５６の外周面の上下端部 に界磁用永久磁石を固着させていない。この従来の永久磁石回転子５６は、永久 磁石片６１を固着していない部分の不釣り合いな荷重によって偏心ロータ６３の 不釣り合いな荷重を打ち消している。FIG. 6 in which the same parts as those in FIG. 4 are designated by the same reference numerals shows a hermetic electric compressor using still another conventional permanent magnet rotor. In this conventional permanent magnet rotor 56, instead of using a weight 69 as a balance weight, the upper and lower ends of a pair of field permanent magnet pieces 61 facing each other are shortened, and the outer peripheral surface of the permanent magnet rotor 56 is reduced. Field permanent magnets are not fixed to the upper and lower ends. In this conventional permanent magnet rotor 56, the unbalanced load of the eccentric rotor 63 is canceled by the unbalanced load of the portion to which the permanent magnet piece 61 is not fixed.
【０００５】[0005]
しかしながら上記サイドカバーとおもりを取り付けた従来の永久磁石回転子は 、サイドカバー等の構成部品の数が多く、組立て工程と部品の管理が繁雑であり 、製造が容易ではない。 また、上記永久磁石片の端部を延長して永久磁石回転子の端面から突出させた 従来の永久磁石回転子は、突出した永久磁石片の端部が回転中に流体抵抗を生じ 、エネルギ効率が悪いという問題があった。この従来の永久磁石回転子は、エネ ルギ効率の問題の他に、突出した永久磁石片の端部が回転中に破損して飛散する 可能性があった。 上記永久磁石片の端部を短縮して永久磁石回転子の外周面の一部に界磁用永久 磁石片を設けない従来の永久磁石回転子は、上記した永久磁石片の破損や流体抵 抗の問題を防止することができるが、永久磁石回転子の外周面全体を活用するこ とができないので、永久磁石回転子の大きさに対して界磁用永久磁石片の磁力が 小さい。界磁用永久磁石の磁力が小さいことにより、この永久磁石回転子は回転 トルクが相対的に小さいという問題があった。 そこで本考案の目的は、界磁用永久磁石片の飛散を防止することができると共 に、エネルギ効率よく、かつ、製造が容易な永久磁石回転子を提供することにあ る。 However, the conventional permanent magnet rotor to which the side cover and the weight are attached has a large number of components such as the side cover, the assembly process and the management of the components are complicated, and the manufacturing is not easy. Further, in the conventional permanent magnet rotor in which the end of the permanent magnet piece is extended and protruded from the end surface of the permanent magnet rotor, in the conventional permanent magnet rotor, the protruding end of the permanent magnet piece causes fluid resistance during rotation, resulting in energy efficiency. There was a problem that was bad. In addition to the problem of energy efficiency, this conventional permanent magnet rotor has a possibility that the protruding end of the permanent magnet piece may be damaged and scattered during rotation. The conventional permanent magnet rotor in which the end portion of the permanent magnet piece is shortened and the permanent magnet piece for field is not provided on a part of the outer peripheral surface of the permanent magnet rotor has the above-mentioned damage to the permanent magnet piece and fluid resistance. However, since the entire outer peripheral surface of the permanent magnet rotor cannot be utilized, the magnetic force of the field permanent magnet piece is smaller than the size of the permanent magnet rotor. Due to the small magnetic force of the field permanent magnet, the permanent magnet rotor has a problem that the rotating torque is relatively small. Therefore, an object of the present invention is to provide a permanent magnet rotor that can prevent scattering of the permanent magnet pieces for field use, is energy efficient, and is easy to manufacture.
【０００６】[0006]
上記目的を達成するために本考案の永久磁石回転子は、多数の鋼板を積層して ヨークを形成し、このヨークの外周面に界磁用永久磁石を固着した永久磁石回転 子において、前記ヨークの少なくとも一部は、大径部と小径部とを有する偏心鋼 板を積層した偏心ヨーク部からなり、この偏心ヨーク部の小径部の外周面に第１ の永久磁石片を装着し、大径部の外周面に第１永久磁石片の外周面と面一になる ような厚さに形成した第２の永久磁石片を装着したことを特徴とするものである 。 In order to achieve the above object, a permanent magnet rotor of the present invention is a permanent magnet rotor in which a plurality of steel plates are laminated to form a yoke, and a field permanent magnet is fixed to the outer peripheral surface of the yoke. At least a part of this consists of an eccentric yoke part made by stacking eccentric steel plates having a large diameter part and a small diameter part. A second permanent magnet piece having a thickness that is flush with the outer circumferential surface of the first permanent magnet piece is attached to the outer circumferential surface of the portion.
【０００７】[0007]
本考案の永久磁石回転子は、大径部と小径部とを有する偏心鋼板を積層して偏 心ヨーク部を形成し、この偏心ヨーク部の小径部の外周面に第１の永久磁石片を 装着し、大径部の外周面に第１の永久磁石片の外周面と面一になるような厚さに 形成した第２の永久磁石片を装着することにより、回転子の内部にバランスウェ イト部を形成し、この回転子バランスウェイト部を回転子の回転中の振動を打ち 消す所定位置に配設したことにより、偏心荷重による永久磁石回転子の振動の増 幅を効果的に防止することができる。 上記の構造により、本考案の永久磁石回転子は、構成部品の数が少なく、組立 てが容易である。また、回転子の端面から永久磁石片が突出していないので、永 久磁石片の突出部による回転中の抵抗が小さく、エネルギ損失がないと共に、前 記永久磁石片の突出部が破損して飛散することがない。 さらに、本考案の永久磁石回転子は永久磁石片を回転子の外周面の全体に設け ることができるので、永久磁石片の長さを短くした従来技術のように永久磁石回 転子の磁力が不足することがない。 In the permanent magnet rotor of the present invention, an eccentric steel plate having a large diameter portion and a small diameter portion is laminated to form an eccentric yoke portion, and a first permanent magnet piece is formed on the outer peripheral surface of the small diameter portion of the eccentric yoke portion. By mounting the second permanent magnet piece formed on the outer peripheral surface of the large-diameter portion so as to have a thickness flush with the outer peripheral surface of the first permanent magnet piece, the balance wafer is provided inside the rotor. The rotor balance weight portion is formed at a predetermined position that cancels the vibration during rotation of the rotor, so that the increase in vibration of the permanent magnet rotor due to the eccentric load is effectively prevented. be able to. With the above structure, the permanent magnet rotor of the present invention has a small number of components and is easy to assemble. In addition, since the permanent magnet piece does not project from the end face of the rotor, the resistance of the permanent magnet piece during rotation is small, there is no energy loss, and the projection of the permanent magnet piece is damaged and scattered. There is nothing to do. Further, since the permanent magnet rotor of the present invention can be provided with the permanent magnet piece on the entire outer peripheral surface of the rotor, the magnetic force of the permanent magnet rotor is reduced as in the prior art in which the length of the permanent magnet piece is shortened. There is no shortage.
【０００８】[0008]
以下本考案の一実施例について添付の図面を参照して説明する。 本願考案の永久磁石回転子の要部は永久磁石回転子自体の構造に関するが、そ の説明に先立って本願考案の永久磁石回転子を用いた密閉型電動圧縮機について 説明する。 図３は本考案の永久磁石回転子を用いた密閉型電動圧縮機の全体を示している 。密閉型電動圧縮機２１は密閉容器２２を有し、この密閉容器２２の内部には駆 動装置２３と圧縮装置２４とが上下直列的に配設されている。 駆動装置２３は固定子２５と永久磁石回転子１とからなる。固定子２５は固定 子鉄心２６と固定子コイル２７とから構成され、密閉容器２２の内周面に固定さ れている。永久磁石回転子１は、前記固定子２５の内側の空間に回転自在に支承 され、その中心部には回転軸２８が圧入され、永久磁石回転子１と回転軸２８が 一体に回転するように構成されている。回転軸２８の下端は前記圧縮装置２４の 偏心ロータ２９に一体に連結されている。 圧縮装置２４は前記偏心ロータ２９と、シリンダ３０と、シリンダ３０の上下 端を密封するシリンダカバー３１と、ベーン３２とを有している。ベーン３２は ばね３３によって付勢され、先端面が常に偏心ロータ３１の外周面に摺接して、 シール面を形成する。 上記構造の密閉型電動圧縮機２１において、図示しない制御回路によって制御 された電流を固定子コイル２７に流すことにより、固定子２５の内部に回転磁界 が生成され、この回転磁界によって永久磁石回転子１は回転駆動される。永久磁 石回転子１の回転によって、偏心ロータ２９は回転軸２８を介して駆動され、シ リンダ３０の内周面に摺接しながら偏心的に回転する。偏心ロータ２９とシリン ダ３０の内周面とベーン３２とによって仕切られた空間が、偏心ロータ２９の回 転によって体積が縮小することにより、その空間に閉じ込められた流体は圧縮さ れ、シリンダカバー３１に設けられた図示しない吐出弁を通って、図中の矢印に 示すように、上方に押し出され、密閉容器２２の上端面に設けられた吐出管３４ から外部に吐出される。 上記から明らかなように、永久磁石回転子１は偏心ロータ２９を偏心的に回転 駆動するので、回転中に不釣り合いな荷重によって振動が増幅され、部分的に大 きな振動を生じる。この振動を打ち消すため、永久磁石回転子１にはバランスウ ェイト部が設けられている。この永久磁石回転子１の構造について図１及び図２ を用いて説明する。 An embodiment of the present invention will be described below with reference to the accompanying drawings. The main part of the permanent magnet rotor of the present invention relates to the structure of the permanent magnet rotor itself, but prior to the description, a hermetic electric compressor using the permanent magnet rotor of the present invention will be described. FIG. 3 shows the entire hermetic electric compressor using the permanent magnet rotor of the present invention. The hermetic electric compressor 21 has a hermetic container 22, and inside the hermetic container 22, a driving device 23 and a compressing device 24 are vertically arranged in series. The drive device 23 includes a stator 25 and a permanent magnet rotor 1. The stator 25 is composed of a stator core 26 and a stator coil 27, and is fixed to the inner peripheral surface of the closed container 22. The permanent magnet rotor 1 is rotatably supported in the space inside the stator 25, and a rotary shaft 28 is press-fitted in the center thereof so that the permanent magnet rotor 1 and the rotary shaft 28 rotate together. It is configured. The lower end of the rotary shaft 28 is integrally connected to the eccentric rotor 29 of the compression device 24. The compression device 24 has the eccentric rotor 29, a cylinder 30, a cylinder cover 31 that seals the upper and lower ends of the cylinder 30, and a vane 32. The vane 32 is biased by a spring 33, and the tip end surface thereof always slides on the outer peripheral surface of the eccentric rotor 31 to form a sealing surface. In the hermetic electric compressor 21 having the above structure, a rotating magnetic field is generated inside the stator 25 by causing a current controlled by a control circuit (not shown) to flow through the stator coil 27, and this rotating magnetic field causes a permanent magnet rotor. 1 is rotationally driven. Due to the rotation of the permanent magnet rotor 1, the eccentric rotor 29 is driven via the rotating shaft 28, and eccentrically rotates while slidingly contacting the inner peripheral surface of the cylinder 30. The space partitioned by the eccentric rotor 29, the inner peripheral surfaces of the cylinders 30 and the vanes 32 is reduced in volume by the rotation of the eccentric rotor 29, so that the fluid trapped in the space is compressed and the cylinder cover is covered. As shown by the arrow in the figure, it is pushed upward through a discharge valve (not shown) provided in 31, and discharged from the discharge pipe 34 provided on the upper end surface of the closed container 22 to the outside. As is clear from the above, since the permanent magnet rotor 1 eccentrically drives the eccentric rotor 29 to rotate, vibration is amplified by the unbalanced load during rotation, and a large vibration is partially generated. In order to cancel this vibration, the permanent magnet rotor 1 is provided with a balance weight portion. The structure of the permanent magnet rotor 1 will be described with reference to FIGS. 1 and 2.
【０００９】 図２は本考案の永久磁石回転子１の上端面を示しており、図１は図２のＩ−Ｉ 線に沿って切断して示した永久磁石回転子１の側断面を示している。図１に示す ように、永久磁石回転子１は多数の鋼板２を積層したヨーク３と、ヨーク３の外 周面に固着された複数の界磁用永久磁石片４とから構成されている。ヨーク３の 上端部と下端部は、大径部Ｌと小径部Ｓとを有する偏心鋼板２ａを積層した偏心 ヨーク部３ａからなり、ヨーク３の中央部分は中心部に開口を有する円形の鋼板 ２ｂを積層した同心ヨーク部３ｂからなる。界磁用永久磁石片４はフェライト系 永久磁石からなり、断面扇状に形成されている。この界磁用永久磁石４には、相 対的に厚さが厚い第１の永久磁石片４a と、相対的に厚さが薄く、第１の永久磁 石片４a の外周面と面一になるように形成された第２の永久磁石片４b との二種 類が製造される。４つの磁極部を有している本実施例の永久磁石回転子１では、 前記厚さの厚い第１の永久磁石片４a はさらに、外周面側にＮ極の磁性を帯びて いる永久磁石片４a1と、外周面側にＳ極の磁性を帯びている永久磁石片４a2の２ 種類が製造される。同様に厚さが薄い第２の永久磁石片４b も、外周面側にＮ極 の磁性を帯びている永久磁石片４b1と、外周面側にＳ極の磁性を帯びている永久 磁石片４b2の２種類が製造される。 前記ヨーク３の上下端の偏心ヨーク３ａは、それぞれの大径部Ｌが回転軸２８ に関して１８０°隔てて反対側に配置されている。図１と図２から明らかなよう に、偏心ヨーク３ａの大径部Ｌの外周面には厚さが薄い第２永久磁石片４b1， ４b2が固着され、小径部Ｓには、厚さが厚い第１の永久磁石片４a1，４a2が固着 されている。これら永久磁石片４a1，４a2，４b1，４b2は永久磁石回転子１の外 周面が面一となると共に、周方向に交互にＮ極とＳ極の磁性を示すように装着さ れている。FIG. 2 shows the upper end surface of the permanent magnet rotor 1 of the present invention, and FIG. 1 shows a side cross-section of the permanent magnet rotor 1 taken along the line II of FIG. ing. As shown in FIG. 1, the permanent magnet rotor 1 is composed of a yoke 3 in which a large number of steel plates 2 are laminated and a plurality of field permanent magnet pieces 4 fixed to the outer peripheral surface of the yoke 3. The upper end and the lower end of the yoke 3 are composed of an eccentric yoke part 3a in which eccentric steel plates 2a having a large diameter part L and a small diameter part S are laminated, and the central part of the yoke 3 is a circular steel plate 2b having an opening in the center part. And a concentric yoke portion 3b. The field permanent magnet piece 4 is made of a ferrite-based permanent magnet and has a fan-shaped cross section. This is field permanent magnet 4, and the relative to the thickness is thicker first permanent magnet piece 4 a, thin relatively thick, the outer peripheral surface and the surface of the first permanent magnet piece 4 a Two kinds of second permanent magnet pieces 4 b formed so as to be one are manufactured. In the permanent magnet rotor 1 of this embodiment having four magnetic pole parts, the thick first permanent magnet piece 4a further has the N pole magnetism on the outer peripheral surface side. a piece 4 a1, 2 types of permanent magnet pieces 4 a2 are magnetized in S-pole on the outer peripheral surface side is prepared. Similarly, the second permanent magnet piece 4 b having a small thickness is also composed of a permanent magnet piece 4 b1 having an N-pole magnetism on the outer peripheral surface side and a permanent magnet piece having an S-pole magnetism on the outer peripheral surface side. Two types of 4 b2 are manufactured. The large-diameter portions L of the eccentric yokes 3a at the upper and lower ends of the yoke 3 are arranged on the opposite side with respect to the rotary shaft 28 at an angle of 180 °. As is apparent from FIGS. 1 and 2, the thin second permanent magnet pieces 4 b1 and 4 b2 are fixed to the outer peripheral surface of the large diameter portion L of the eccentric yoke 3a, and the small diameter portion S has a thickness of The first permanent magnet pieces 4 a1 and 4 a2 having a large thickness are fixed. These permanent magnet pieces 4 a1 , 4 a2 , 4 b1 and 4 b2 are mounted so that the outer peripheral surface of the permanent magnet rotor 1 is flush with each other, and the magnets of the N pole and the S pole alternate in the circumferential direction. Has been.
【００１０】 次に、上記構造に基づいてこの実施例の永久磁石回転子の作用について以下に 説明する。 偏心ヨーク部３ａの部分では、永久磁石片４を構成する材料とヨーク３を構成 する材料の比重の違いから、偏心ヨーク部３ａの重心位置Ｗは、回転軸２８の中 心からヨーク３の大径部Ｌの方向に偏位し、回転子のバランスウェイト部を構成 する。ヨーク３の大径部Ｌは、ヨーク３の上端部と下端部とでは回転軸２８に関 して反対側に配置されているので、偏心ヨーク部３ａの重心位置Ｗは、図１に示 すように、ヨーク３の上端部と下端部とで回転軸２８に関して反対側に偏位して いる。 本実施例の偏心ロータ２９のような荷重の重心位置が偏位している物体を駆動 する場合、前記永久磁石回転子１の重心位置Ｗを適当な位置にすることにより、 被駆動物を含めた永久磁石回転子全体の振動モードを変化させることができ、そ の結果、振動の増幅を防止することができる。 振動の増幅を防止できることの他に、本考案の永久磁石回転子によれば、永久 磁石片が回転子の両端面から突出することがないので、永久磁石片の突出端によ る回転中の流体抵抗が少なく、エネルギ効率の高い永久磁石回転子を得ることが できる。また反対に永久磁石片がヨークの軸方向長さより短いことがないので、 回転子の外周面全体を永久磁石で覆うことができ、強い磁力を有する永久磁石回 転子を得ることができる。 また、本考案の永久磁石回転子は、構成部品が少なく、かつ、鋼板を積層して ヨークを形成した後に、ヨークの外周面に永久磁石片を固着することのみによっ て製造することができるので、容易に製造することができ、生産性の高い永久磁 石回転子を得ることができる。Next, the operation of the permanent magnet rotor of this embodiment will be described based on the above structure. In the portion of the eccentric yoke portion 3a, the center of gravity W of the eccentric yoke portion 3a varies from the center of the rotary shaft 28 to the large diameter of the yoke 3 due to the difference in specific gravity between the material forming the permanent magnet piece 4 and the material forming the yoke 3. It is deviated in the direction of the portion L and constitutes the balance weight portion of the rotor. Since the large-diameter portion L of the yoke 3 is disposed on the opposite side of the upper end portion and the lower end portion of the yoke 3 with respect to the rotating shaft 28, the gravity center position W of the eccentric yoke portion 3a is shown in FIG. Thus, the upper end and the lower end of the yoke 3 are offset to the opposite sides with respect to the rotating shaft 28. When driving an object such as the eccentric rotor 29 of the present embodiment, in which the center of gravity of the load is displaced, the center of gravity W of the permanent magnet rotor 1 is set to an appropriate position to include the driven object. In addition, the vibration mode of the entire permanent magnet rotor can be changed, and as a result, amplification of vibration can be prevented. In addition to preventing the amplification of vibration, the permanent magnet rotor of the present invention prevents the permanent magnet pieces from protruding from both end surfaces of the rotor. A permanent magnet rotor with low fluid resistance and high energy efficiency can be obtained. On the contrary, since the permanent magnet piece is not shorter than the axial length of the yoke, the entire outer peripheral surface of the rotor can be covered with the permanent magnet, and the permanent magnet rotor having a strong magnetic force can be obtained. Further, the permanent magnet rotor of the present invention has few constituent parts, and can be manufactured only by fixing the permanent magnet pieces to the outer peripheral surface of the yoke after forming the yoke by laminating the steel plates. Therefore, a permanent magnet rotor that can be easily manufactured and has high productivity can be obtained.
【００１１】[0011]
上記したように本考案による永久磁石回転子は、ヨークの少なくとも一部を、 大径部と小径部とを有する偏心鋼板を積層した偏心ヨーク部によって構成し、こ の偏心ヨーク部の小径部の外周面に第１の永久磁石片を装着し、大径部の外周面 に第１の永久磁石片の外周面と面一になるような厚さに形成された第２の永久磁 石片を装着して回転子の内部にバランスウェイト部を形成し、この回転子バラン スウェイト部を回転中の振動を打ち消す所定位置に配設しているので、駆動され る物の偏心荷重によって生じる振動の増幅を効果的に防止することができる。ま た、本考案の永久磁石回転子の構成部品は、鋼板と永久磁石片構成部品とからな り、構成部品の数が少ないと共に、その組立てが容易であり、永久磁石回転子全 体の製造が容易である。また、回転子の端面から永久磁石片が突出していないの で、永久磁石片の突出部による回転中の流体抵抗が小さく、エネルギ損失が少な いと共に、前記永久磁石片の突出部が破損して飛散することがない。さらに、本 考案の永久磁石回転子は外周面の全体に永久磁石片を設けることができるので、 磁力が強く、発生するトルクが大きい。 従って、上記したことから明らかなように、本考案によれば、製造が容易であ り、エネルギ効率が高く、界磁用永久磁石が飛散することがない永久磁石回転子 を得ることができる。 As described above, in the permanent magnet rotor according to the present invention, at least a part of the yoke is formed by the eccentric yoke portion formed by laminating the eccentric steel plates having the large diameter portion and the small diameter portion. The first permanent magnet piece is attached to the outer peripheral surface, and the second permanent magnet piece formed to have a thickness flush with the outer peripheral surface of the first permanent magnet piece is attached to the outer peripheral surface of the large diameter portion. A balance weight is formed inside the rotor by mounting it, and this rotor balance weight is placed at a predetermined position to cancel the vibration during rotation, so the vibration generated by the eccentric load of the driven object is amplified. Can be effectively prevented. Further, the components of the permanent magnet rotor of the present invention are composed of a steel plate and permanent magnet piece components, so that the number of components is small and the assembling thereof is easy. Is easy. Further, since the permanent magnet piece does not project from the end face of the rotor, the fluid resistance during rotation due to the projection of the permanent magnet piece is small, the energy loss is small, and the projection of the permanent magnet piece is damaged. There is no scattering. Further, since the permanent magnet rotor of the present invention can be provided with the permanent magnet pieces on the entire outer peripheral surface, the magnetic force is strong and the generated torque is large. Therefore, as is apparent from the above, according to the present invention, it is possible to obtain a permanent magnet rotor that is easy to manufacture, has high energy efficiency, and does not scatter the field permanent magnets.
【図１】本考案の永久磁石回転子の回転軸方向の側断面
図。FIG. 1 is a side sectional view of a permanent magnet rotor according to the present invention in a rotation axis direction.
【図２】本考案の永久磁石回転子の上端面を示した平面
図。FIG. 2 is a plan view showing an upper end surface of the permanent magnet rotor of the present invention.
【図３】本考案の永久磁石回転子を用いた密閉型電動圧
縮機の側断面図。FIG. 3 is a side sectional view of a hermetic electric compressor using the permanent magnet rotor of the present invention.
【図４】サイドカバーとおもりとを取り付けた従来の永
久磁石回転子を用いた密閉型電動圧縮機の側断面図。FIG. 4 is a side sectional view of a hermetic electric compressor using a conventional permanent magnet rotor having a side cover and a weight attached.
【図５】界磁用永久磁石片の端部を延長した従来の永久
磁石回転子を用いた密閉型電動圧縮機の側断面図。FIG. 5 is a side sectional view of a hermetic electric compressor using a conventional permanent magnet rotor in which an end portion of a field permanent magnet piece is extended.
【図６】界磁用永久磁石片の端部を短縮した従来の永久
磁石回転子を用いた密閉型電動圧縮機の側断面図。FIG. 6 is a side sectional view of a hermetic electric compressor using a conventional permanent magnet rotor in which the end of the permanent magnet piece for field magnet is shortened.
１ 永久磁石回転子 ２ 鋼板 ２ａ 偏心鋼板 ３ ヨーク ３ａ 偏心ヨーク部 ４ 永久磁石片 ４a 第１の永久磁石片 ４b 第２の永久磁石片 Ｓ 小径部 Ｌ 大径部1 permanent magnet rotor 2 steel 2a eccentric steel 3 yoke 3a eccentric yoke portion 4 permanent magnet pieces 4 a first permanent magnet piece 4 b second permanent magnet pieces S small diameter portion L large diameter portion
Claims (1)
のヨークの外周面に界磁用永久磁石を固着した永久磁石
回転子において、前記ヨークの少なくとも一部は、大径
部と小径部とを有する偏心鋼板を積層した偏心ヨーク部
からなり、この偏心ヨーク部の小径部の外周面に第１の
永久磁石片を装着し、大径部の外周面に第１永久磁石片
の外周面と面一になるような厚さに形成した第２の永久
磁石片を装着したことを特徴とする永久磁石回転子。Claims for utility model registration Claims: 1. A permanent magnet rotor in which a large number of steel plates are laminated to form a yoke, and a permanent magnet for field magnet is fixed to the outer peripheral surface of the yoke. The part is composed of an eccentric yoke part in which eccentric steel plates having a large diameter part and a small diameter part are laminated, and the first permanent magnet piece is attached to the outer peripheral surface of the small diameter part of the eccentric yoke part, and the outer peripheral surface of the large diameter part is attached. A permanent magnet rotor, wherein a second permanent magnet piece formed to have a thickness flush with the outer peripheral surface of the first permanent magnet piece is attached to the second permanent magnet piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5130291U JPH054740U (en) | 1991-07-03 | 1991-07-03 | Permanent magnet rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5130291U JPH054740U (en) | 1991-07-03 | 1991-07-03 | Permanent magnet rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH054740U true JPH054740U (en) | 1993-01-22 |
Family
ID=12883127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5130291U Pending JPH054740U (en) | 1991-07-03 | 1991-07-03 | Permanent magnet rotor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH054740U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000166144A (en) * | 1998-11-26 | 2000-06-16 | Mitsubishi Heavy Ind Ltd | Magnet motor and compressor |
| JP2011101544A (en) * | 2009-11-09 | 2011-05-19 | Daikin Industries Ltd | Rotary electric machine |
-
1991
- 1991-07-03 JP JP5130291U patent/JPH054740U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000166144A (en) * | 1998-11-26 | 2000-06-16 | Mitsubishi Heavy Ind Ltd | Magnet motor and compressor |
| JP2011101544A (en) * | 2009-11-09 | 2011-05-19 | Daikin Industries Ltd | Rotary electric machine |
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