JP3485880B2 - Rotor of motor for compressor - Google Patents
Rotor of motor for compressorInfo
- Publication number
- JP3485880B2 JP3485880B2 JP2000327404A JP2000327404A JP3485880B2 JP 3485880 B2 JP3485880 B2 JP 3485880B2 JP 2000327404 A JP2000327404 A JP 2000327404A JP 2000327404 A JP2000327404 A JP 2000327404A JP 3485880 B2 JP3485880 B2 JP 3485880B2
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- rotor core
- electric motor
- magnetic body
- compressor
- 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 - Fee Related
Links
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、回転子内に磁性体
を有する圧縮機用電動機に関し、特に前記回転子の改良
構成に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor electric motor having a magnetic body in a rotor, and more particularly to an improved structure of the rotor.
【０００２】[0002]
【従来の技術】一般に従来の圧縮機用電動機の回転子の
構造としては、特開昭５７−５２３５９号公報に記載さ
れたようなものがあった。この公報に記載されたものは
金属製のパイプの中に予め積層した回転子鉄心、磁性体
（永久磁石）を配置した後、ダイカストによってこれら
のパイプ、回転子鉄心、磁性体を一体に構成したもので
あった。2. Description of the Related Art Generally, as a conventional rotor structure of a compressor electric motor, there is a structure described in JP-A-57-52359. In the one described in this publication, a rotor core and a magnetic body (permanent magnet), which are laminated in advance in a metal pipe, are arranged, and then these pipe, rotor core and magnetic body are integrally formed by die casting. It was a thing.
【０００３】また他の従来技術としては、特開平２−２
４６７４８号公報に記載されたようなものがあった。こ
の公報に記載されたものも前記公報に記載されたものと
同様に金属製のパイプに中に予め積層した回転子鉄心、
磁性体（永久磁石）を配置した後、クランプピンによっ
てこれらの回転子鉄心を一体に構成したものであった。
この際、隣り合う磁性体間に空隙によるエアギャップ部
を設けて磁性体の極分離を確保し、効率の向上を図った
ものであった。Another conventional technique is Japanese Patent Laid-Open No. 2-2.
There was a thing as described in 46748 gazette. The one described in this publication also has a rotor core pre-laminated in a metal pipe in the same manner as that described in the above publication,
After arranging a magnetic body (permanent magnet), these rotor cores were integrally configured by clamp pins.
At this time, an air gap portion is formed by a gap between the adjacent magnetic bodies to ensure pole separation of the magnetic bodies and improve efficiency.
【０００４】また、他の従来技術としては、特公昭６０
−２３５８４号公報に記載されたようなものもあった。
この公報に記載されたものは、回転子の鉄心内に磁極に
なる磁性体を挿入（埋め込み）したものであった。特
に、この公報に記載されたものは、自己始動可能な同期
電動機に関するものであった。As another conventional technique, Japanese Patent Publication No. 60
Some of them are described in Japanese Patent No. 23584.
What is described in this publication is one in which a magnetic body serving as a magnetic pole is inserted (embedded) in an iron core of a rotor. In particular, the one disclosed in this publication relates to a self-startable synchronous motor.
【０００５】更に、他の従来技術としては、特開平４−
１８５２４７号公報に記載されたようなものもあった。
この公報に記載されたものは、突極構造を有する回転子
鉄心の突極部に磁性体を埋め込んで回転子を構成したも
のであった。特に、この公報に記載されたものは磁性体
を埋め込んだ回転子鉄心及び回転子鉄心の両端面を覆う
端面部材を回転軸に圧入することによって一体に構成さ
せるものであった。Further, as another conventional technique, Japanese Patent Application Laid-Open No. Hei 4-
Some of them are described in Japanese Patent No. 185247.
What is described in this publication is a rotor configured by embedding a magnetic material in the salient pole portion of a rotor core having a salient pole structure. In particular, the one disclosed in this publication has a rotor core in which a magnetic material is embedded and end face members covering both end faces of the rotor core are press-fitted into a rotary shaft to be integrally configured.
【０００６】[0006]
【発明が解決しようとする課題】このように構成された
従来の圧縮機用電動機（ブラシレスＤＣモータ）の回転
子においては、界磁を構成する磁性体としてストロンチ
ウムフェライト等のフェライト系磁石材が用いられてい
た。このフェライト系磁石材は、アルニコ系磁石材より
も保持力Ｈｃが大きく、また、原料の単位重量当たりの
価格が低い等の利点があるものの、残留磁束密度Ｂｒは
最大でも約０．４（Ｔ）と小さく、磁気エネルギー積は
小さい。そのため、ギャップの磁束数を大きくして所要
の出力を得るためには、回転子の寸法を大きくしてギャ
ップの面積を大きくとる必要がある。In the rotor of the conventional compressor electric motor (brushless DC motor) configured as described above, a ferrite magnet material such as strontium ferrite is used as the magnetic material forming the field. It was being done. Although this ferrite-based magnet material has advantages such as a larger coercive force Hc and a lower price per unit weight of the raw material than the alnico-based magnet material, the residual magnetic flux density Br is at most about 0.4 (T ) And the magnetic energy product is small. Therefore, in order to increase the number of magnetic fluxes in the gap and obtain the required output, it is necessary to increase the size of the rotor and increase the area of the gap.
【０００７】ここで、回転子鉄心の直径を変更したり、
圧縮機の密閉容器の外径を変更することは、製造設備等
の大がかりな変更に繋がるため、事実上困難である。従
って、回転子の寸法拡大は一般的には回転子の直径の拡
大よりも軸方向の寸法を拡張することで対処され、従来
のフェライト系磁石材の場合には回転子鉄心の直径Ｄと
回転軸方向の寸法Ｌとの比Ｌ／Ｄが１．２〜１．４とさ
れていた。Here, the diameter of the rotor core is changed,
It is practically difficult to change the outer diameter of the airtight container of the compressor because it leads to a large-scale change of manufacturing equipment and the like. Therefore, the expansion of the size of the rotor is generally dealt with by expanding the size in the axial direction rather than the expansion of the diameter of the rotor. In the case of the conventional ferrite magnet material, the diameter D of the rotor core and the rotation The ratio L / D to the dimension L in the axial direction was 1.2 to 1.4.
【０００８】しかしながら、この種圧縮機用電動機の回
転軸は圧縮要素部分の軸受けで保持された片持ち式であ
るため、上述の如く回転子の回転軸方向の寸法が大きく
なると、特に高速回転時において大きな振れが発生し、
振動・騒音が増大すると共に、信頼性及び運転効率が共
に低下すると云う問題があった。However, since the rotating shaft of this kind of compressor electric motor is a cantilever type held by the bearing of the compression element portion, when the size of the rotor in the rotating shaft direction becomes large as described above, especially at high speed rotation. A big shake occurred in
There has been a problem that vibration and noise increase and reliability and operating efficiency both decrease.
【０００９】本発明は、係る従来の技術的課題を解決す
るために成されたものであり、所要の出力を維持しつ
つ、圧縮機用電動機の回転子の寸法縮小を図り、その信
頼性及び運転効率を向上させることを目的とする。The present invention has been made in order to solve the above-mentioned conventional technical problems, and the size of the rotor of the compressor electric motor is reduced while maintaining the required output, and its reliability and The purpose is to improve operating efficiency.
【００１０】[0010]
【課題を解決するための手段】本発明は、積層された回
転子鉄心内に磁性体を有する圧縮機用電動機の回転子に
おいて、前記磁性体を複数の希土類系磁石材により構成
すると共に、これら磁性体の端部と端部との間には、前
記回転子鉄心の外周から前記端部側に切欠かれた切欠部
を設け、前記回転子鉄心の直径Ｄと回転軸方向の寸法Ｌ
との比Ｌ／Ｄを１．１より小さくしたものである。According to the present invention, in a rotor of a compressor electric motor having a magnetic body in a laminated rotor core, the magnetic body is composed of a plurality of rare earth magnet materials, and Between the end portions of the magnetic body, a cutout portion that is cut out from the outer periphery of the rotor core toward the end portion is provided, and the diameter D of the rotor core and the dimension L in the rotation axis direction are provided.
The ratio L / D with the ratio is smaller than 1.1.
【００１１】また、積層された回転子鉄心内に磁性体を
有する圧縮機用電動機の回転子において、前記磁性体を
複数の希土類系磁石材により構成すると共に、これら磁
性体の端部と端部との間には、前記回転子鉄心の外周か
ら前記端部側に切欠いて突極部を形成するための切欠部
を設け、この突極部に前記磁性体を挿入し、前記回転子
鉄心の直径Ｄと回転軸方向の寸法Ｌとの比Ｌ／Ｄを１．
１より小さくしたものである。Further, in a rotor of a compressor electric motor having a magnetic body in a laminated rotor iron core, the magnetic body is composed of a plurality of rare earth magnet materials, and end portions and end portions of these magnetic bodies are formed. Between the and, a cutout portion for forming a salient pole portion is provided by cutting out from the outer circumference of the rotor core to the end side, and the magnetic body is inserted into this salient pole portion, The ratio L / D between the diameter D and the dimension L in the rotation axis direction is 1.
It is smaller than 1.
【００１２】また、積層された回転子鉄心内に磁性体を
有する圧縮機用電動機の回転子において、前記磁性体を
希土類系磁石材により構成すると共に、これら磁性体の
端部と回転子の外周との間には、この外周から前記端部
側に切欠かれた切欠部を設け、前記回転子鉄心の直径Ｄ
と回転軸方向の寸法Ｌとの比Ｌ／Ｄを１．１より小さく
したものである。Further, in a rotor of a compressor electric motor having a magnetic body in a laminated rotor core, the magnetic body is made of a rare earth magnet material, and the end portions of these magnetic bodies and the outer circumference of the rotor. And a notch portion that is notched from this outer periphery to the end side, and is provided with a diameter D of the rotor core.
The ratio L / D of the dimension L in the direction of the rotation axis is smaller than 1.1.
【００１３】図７は界磁を構成する磁性体として使用す
る永久磁石であるフィライト系磁石材と希土類系磁石材
の減磁曲線を示し、縦軸は磁束密度Ｂ、横軸は保持力Ｈ
ｃを示している。尚、同図中、破線で示したのが一般的
なフェライト系磁石材の場合、実線で示したのが一般的
な希土類系磁石材の場合で、Ｔ１は＋２５℃、Ｔ２は＋
１５０℃の各場合である。同図より分かる通り、希土類
系磁石材は、フェライト系磁石材に比して残留磁束密度
Ｂｒ及び保持力Ｈｃ共に大きく、磁気エネルギー積もき
わめて大きい。従って、磁石面積を小さくしても必要な
ギャップ磁束数を確保でき、所要の出力を得ることが可
能となる。FIG. 7 shows demagnetization curves of a phyllite magnet material and a rare earth magnet material, which are permanent magnets used as a magnetic material forming a field, with the vertical axis representing magnetic flux density B and the horizontal axis representing coercive force H.
c is shown. In the figure, a broken line shows a general ferrite magnet material, and a solid line shows a general rare earth magnet material. T1 is + 25 ° C. and T2 is +
In each case at 150 ° C. As can be seen from the figure, the rare earth magnet material has a larger residual magnetic flux density Br and coercive force Hc than the ferrite magnet material, and the magnetic energy product is also extremely large. Therefore, even if the magnet area is reduced, the required number of gap magnetic fluxes can be secured, and a desired output can be obtained.
【００１４】そこで、本発明では積層された回転子鉄心
２６内に設ける磁性体４５を係る希土類系磁石材とした
ので、従来の如きフェライト系磁石材を用いた場合に比
して、所要の出力を維持しつつ、回転子鉄心２６の寸法
を縮小することができるようになり、回転子５の振れに
よって発生する振動・騒音を低減して信頼性及び運転効
率の向上を図ることが可能となる。Therefore, in the present invention, since the magnetic material 45 provided in the laminated rotor iron cores 26 is the rare earth magnet material, the required output is higher than that of the conventional ferrite magnet material. It becomes possible to reduce the size of the rotor core 26 while maintaining the above, and it is possible to reduce the vibration and noise generated by the vibration of the rotor 5 and improve the reliability and the operation efficiency. .
【００１５】特に、回転子鉄心２６の直径Ｄと回転軸６
方向の寸法Ｌとの比Ｌ／Ｄを１．１より小さくして、回
転子鉄心２６の寸法縮小を専ら回転軸６方向の寸法Ｌの
縮小に当てたので、回転子鉄心２６の直径、或いは圧縮
機Ｃの密閉容器１の外径変更による製造設備等の変更の
必要性を解消することができるようになる。In particular, the diameter D of the rotor core 26 and the rotating shaft 6
Since the ratio L / D to the dimension L in the direction is made smaller than 1.1 and the dimension reduction of the rotor core 26 is applied exclusively to the dimension L reduction in the direction of the rotating shaft 6, the diameter of the rotor core 26, or It becomes possible to eliminate the need to change the manufacturing equipment or the like by changing the outer diameter of the closed container 1 of the compressor C.
【００１６】また、請求項２の如く磁性体４５の厚さ寸
法ｔと回転軸６方向の寸法ｌとの比ｔ／ｌを０．０８よ
り小さくすれば、比較的高価な希土類系磁石材を用いた
ことによるコストの高騰を解消若しくは最小限に抑える
ことができる。If the ratio t / l between the thickness t of the magnetic body 45 and the dimension l in the direction of the rotary shaft 6 is set to be smaller than 0.08, a relatively expensive rare earth magnet material can be obtained. It is possible to eliminate or minimize the cost increase due to the use.
【００１７】[0017]
【発明の実施の形態】以下、図面に基づき本発明の実施
例を詳述する。図１は本発明を適用する圧縮機Ｃの縦断
側面図である。この図において、１は密閉容器であり、
内部の上側に電動機（ブラシレスＤＣモータ）２、下側
にこの電動機２で回転駆動される圧縮要素３が収納され
ている。密閉容器１は予め２分割されたものに電動機
２、圧縮要素３を収納した後、高周波溶着などによって
密閉されたものである。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a vertical sectional side view of a compressor C to which the present invention is applied. In this figure, 1 is a closed container,
An electric motor (brushless DC motor) 2 is housed in the upper part of the inside, and a compression element 3 rotatably driven by the electric motor 2 is housed in the lower part. The hermetically sealed container 1 is a container that is previously divided into two parts, and the electric motor 2 and the compression element 3 are housed therein, and then hermetically sealed by high frequency welding or the like.
【００１８】電動機２は、密閉容器１の内壁に固定され
た固定子４と、この固定子４の内側に回転軸６を中心に
して回転自在に支持された回転子５とから構成されてい
る。そして、固定子４は回転子５に回転磁界を与える固
定子巻線７を備えている。The electric motor 2 is composed of a stator 4 fixed to the inner wall of the hermetic container 1, and a rotor 5 supported inside the stator 4 so as to be rotatable around a rotation shaft 6. . The stator 4 is provided with a stator winding 7 that gives a rotating magnetic field to the rotor 5.
【００１９】圧縮要素３は中間仕切板８で仕切られた第
１のロータリー用シリンダ９及び第２のロータリーシリ
ンダ１０を備えている。各のシリンダ９、１０には回転
軸６で回転駆動される偏心部１１、１２が取り付けられ
ており、これら偏心部１１、１２は偏心位置がお互いに
１８０度位相がずれている。The compression element 3 comprises a first rotary cylinder 9 and a second rotary cylinder 10 which are partitioned by an intermediate partition plate 8. Eccentric parts 11 and 12 which are rotationally driven by the rotary shaft 6 are attached to the respective cylinders 9 and 10, and the eccentric parts 11 and 12 are out of phase with each other by 180 degrees in phase.
【００２０】１３、１４はそれぞれシリンダ９、１０内
を回転する第１のローラ、第２のローラであり、それぞ
れ偏心部１１、１２の回転でシリンダ内を回る。１５、
１６はそれぞれ第１の枠体、第２の枠体であり、第１の
枠体１５は仕切板８との間にシリンダ９の閉じた圧縮空
間を形成させ、第２の枠体１６は同様に仕切板８との間
にシリンダ１０の閉じた圧縮空間を形成させている。ま
た、第１の枠体１５、第２の枠体１６はそれぞれ回転軸
６の下部を回転自在に軸支する軸受部１７、１８を備え
ている。Reference numerals 13 and 14 are a first roller and a second roller which rotate in the cylinders 9 and 10, respectively, and rotate inside the cylinders by rotation of the eccentric portions 11 and 12, respectively. 15,
Reference numerals 16 are a first frame body and a second frame body, respectively. The first frame body 15 forms a compression space in which the cylinder 9 is closed between the first frame body 15 and the partition plate 8, and the second frame body 16 is the same. A closed compression space of the cylinder 10 is formed between the partition 10 and the partition plate 8. The first frame body 15 and the second frame body 16 respectively include bearing portions 17 and 18 that rotatably support the lower portion of the rotary shaft 6.
【００２１】１９、２０は吐出マフラーであり、それぞ
れ第１の枠体１５、第２の枠体１６を覆うように取付ら
れている。尚、シリンダ９と吐出マフラー１９は第１の
枠体１５に設けられた図示しない吐出孔にて連通されて
おり、シリンダ１０と吐出マフラー２０も第２の枠体１
６に設けられた図示しない吐出孔にて連通されている。
２１は密閉容器１の外部に設けられたバイパス管であ
り、吐出マフラー２０の内部に連通している。Reference numerals 19 and 20 denote discharge mufflers, which are attached so as to cover the first frame 15 and the second frame 16, respectively. The cylinder 9 and the discharge muffler 19 are communicated with each other through a discharge hole (not shown) provided in the first frame body 15, and the cylinder 10 and the discharge muffler 20 are also connected to the second frame body 1.
The discharge holes (not shown) provided in 6 communicate with each other.
Reference numeral 21 is a bypass pipe provided outside the closed container 1 and communicates with the inside of the discharge muffler 20.
【００２２】２２は密閉容器１の上に設けられた吐出管
であり、２３、２４はそれぞれシリンダ９、１０へつな
がる吸入管である。また、２５は密閉ターミナルであ
り、密閉容器１の外部から固定子４の固定子巻線７へ電
力を供給するものである（密閉ターミナル２５と固定子
巻線７とをつなぐリード線は図示せず）。Reference numeral 22 is a discharge pipe provided on the closed container 1, and 23 and 24 are suction pipes connected to the cylinders 9 and 10, respectively. Further, reference numeral 25 is a closed terminal for supplying electric power from the outside of the closed container 1 to the stator winding 7 of the stator 4 (the lead wire connecting the closed terminal 25 and the stator winding 7 is not shown). No).
【００２３】図２は図１に示した回転子５の一部縦断側
面図、図３は平面図である（回転軸６に圧入する前の状
態）。各図において、２６は回転子鉄心であり、厚さ
０．３ｍｍ〜０．７ｍｍの電磁鋼板から図４の如き形状
に打ち抜いた回転子用鉄板２７を複数枚積層し、お互い
にかしめて一体に積層されている（尚、かしめによらず
に溶接にて一体化しても良い）。FIG. 2 is a partially longitudinal side view of the rotor 5 shown in FIG. 1, and FIG. 3 is a plan view (state before being pressed into the rotary shaft 6). In each drawing, 26 is a rotor core, and a plurality of rotor iron plates 27 punched in a shape as shown in FIG. 4 from electromagnetic steel plates having a thickness of 0.3 mm to 0.7 mm are laminated and caulked together to be integrated. It is laminated (it may be integrated by welding instead of caulking).
【００２４】この回転子用鉄板２７は、図４に示す如く
四極の磁極を構成する突極部２８〜３１が形成されるよ
うに電磁鋼板から打ち抜かれており、３２〜３５はそれ
ぞれの突極部２８〜３１間に突極部が形成されるように
設けられた切欠部である。このとき、各突極部２８〜３
１の頂点間の外径Ｄは４０ｍｍ〜７０ｍｍの範囲とさ
れ、実施例では例えば５０ｍｍである。The rotor iron plate 27 is punched out from an electromagnetic steel plate so that salient pole portions 28 to 31 forming quadrupole magnetic poles are formed as shown in FIG. 4, and 32 to 35 are salient poles. It is a notch provided so that a salient pole portion is formed between the portions 28 to 31. At this time, each salient pole portion 28-3
The outer diameter D between the vertices of 1 is in the range of 40 mm to 70 mm, and is 50 mm in the embodiment.
【００２５】４１〜４４は後述する磁性体４５（永久磁
石）を圧入するための挿入孔であり、各突極部２８〜３
１に対応し、回転子用鉄板２７の外周側において、回転
軸６の軸方向に沿って同心円上に穿設されている。そし
て、各挿入孔４１〜４４と隣接する突極部２８〜３１の
側壁間の狭路幅ｄは０．３ｍｍ以上０．５ｍｍ未満とさ
れている。Reference numerals 41 to 44 are insertion holes for press-fitting a magnetic body 45 (permanent magnet), which will be described later, and salient pole portions 28 to 3 respectively.
Corresponding to No. 1, on the outer peripheral side of the rotor iron plate 27, the rotor iron plate 27 is concentrically provided along the axial direction of the rotary shaft 6. The narrow path width d between the sidewalls of the salient pole portions 28 to 31 adjacent to the insertion holes 41 to 44 is set to 0.3 mm or more and less than 0.5 mm.
【００２６】また、４６は回転子用鉄板２７の中心に形
成され、回転軸６が焼バメされる孔である。４７〜５０
は後述するかしめ用のリベット５１〜５４が通される大
きさと形状の貫通孔であり、各挿入孔４１〜４４の内側
に対応して穿設されている。５６〜５９は各回転子用鉄
板２７相互をかしめ固定するためのかしめ部であり、各
貫通孔４７〜５０とほぼ同心円上で各挿入孔４１〜４４
の間に形成されている。更に、６１〜６４は各かしめ部
５６〜５９の内側に穿設されたオイル通路を形成するた
めの孔である。Reference numeral 46 is a hole which is formed in the center of the rotor iron plate 27 and in which the rotary shaft 6 is shrink-fitted. 47-50
Is a through hole having a size and shape through which rivets 51 to 54 for caulking, which will be described later, are inserted, and is formed corresponding to the inside of each of the insertion holes 41 to 44. Reference numerals 56 to 59 are caulking portions for caulking and fixing the rotor iron plates 27 to each other, and the insertion holes 41 to 44 are substantially concentric with the through holes 47 to 50.
Is formed between. Further, 61 to 64 are holes for forming oil passages formed inside the caulked portions 56 to 59.
【００２７】各回転子用鉄板２７は複数枚積層され、前
記かしめ部５６〜５９において相互にかしめられて一体
化されることにより、図５の側面図に示す如き回転子鉄
心２６が形成される。このとき、回転子鉄心２６の外径
は前述の回転子用鉄板２７の外径Ｄ（５０ｍｍ）であ
り、回転軸６方向の積層寸法Ｌは例えば４０ｍｍとされ
ている。ここで、前記外径Ｄと寸法Ｌの比Ｌ／Ｄは１．
１より小さくなるように形成し、実施例では０．８とな
る。即ち、回転軸６方向の寸法Ｌが小さくなるように設
定する。A plurality of iron plates 27 for rotors are laminated and caulked at the caulking portions 56 to 59 to be integrated with each other to form a rotor iron core 26 as shown in the side view of FIG. . At this time, the outer diameter of the rotor core 26 is the outer diameter D (50 mm) of the above-described rotor iron plate 27, and the stacking dimension L in the direction of the rotating shaft 6 is, for example, 40 mm. Here, the ratio L / D of the outer diameter D and the dimension L is 1.
It is formed to be smaller than 1, and is 0.8 in the embodiment. That is, the dimension L in the direction of the rotating shaft 6 is set to be small.
【００２８】一方、磁性体４５は、例えばプラセオジウ
ム系磁石、若しくは表面にニッケルメッキを施したネオ
ジウム系磁石等の希土類系磁石材にて構成されており、
その外形は図６に示す如き矩形状とされている。そし
て、磁性体４５の厚さｔは例えば２．６５ｍｍとし、そ
の回転軸６方向の寸法ｌは前述の寸法Ｌと同じ４０ｍｍ
とする。ここで、前記厚さｔと寸法ｌの比ｔ／ｌは０．
０８より小さくなるように形成し、実施例では０．０６
６となる（尚、各挿入孔４１〜４４は、この磁性体４５
がきっちり圧入される大きさとされている）。On the other hand, the magnetic body 45 is made of a rare earth magnet material such as a praseodymium magnet or a neodymium magnet whose surface is plated with nickel.
The outer shape is rectangular as shown in FIG. The thickness t of the magnetic body 45 is, for example, 2.65 mm, and the dimension 1 in the direction of the rotation axis 6 is 40 mm, which is the same as the dimension L described above.
And Here, the ratio t / l of the thickness t and the dimension l is 0.
It is formed to be smaller than 08, and is 0.06 in the embodiment.
6 (note that each of the insertion holes 41 to 44 corresponds to the magnetic body 45).
Has been sized to be press-fitted exactly).
【００２９】６６、６７は回転子鉄心２６の上下端に取
りつけられる平板状の端面部材であり、アルミや樹脂材
料等の非磁性材料により、前記回転子用鉄板２７と略同
形状に成形されている。尚、この端面部材６６、６７の
外径は前記回転子鉄心２６の外径Ｄと同一若しくは若干
小さくする。また、端面部材６６、６７には前記貫通孔
４７〜５０に対応する位置に貫通孔７１〜７４が穿設さ
れ、前記孔５９及び６１〜６４に対応する位置に孔７６
及び７７〜８０が穿設されている。Reference numerals 66 and 67 denote flat plate-shaped end face members to be attached to the upper and lower ends of the rotor core 26, which are made of a non-magnetic material such as aluminum or a resin material to have substantially the same shape as the rotor iron plate 27. There is. The outer diameters of the end surface members 66 and 67 are made equal to or slightly smaller than the outer diameter D of the rotor core 26. Further, through holes 71 to 74 are formed in the end surface members 66 and 67 at positions corresponding to the through holes 47 to 50, and holes 76 are provided at positions corresponding to the holes 59 and 61 to 64.
And 77 to 80 are perforated.
【００３０】そして、回転子鉄心２６の挿入孔４１〜４
４内に前記磁性体４５を圧入した後、上下の端面部材６
６、６７をセットして挿入孔４１〜４４の上下を塞ぐ。
この状態で貫通孔４７〜５０及び７１〜７４は回転子鉄
心２６及び端面部材６６、６７を回転軸６方向に沿って
貫通している。また、孔６１〜６４及び７７〜８０は回
転子鉄心２６と端面部材６６、６７を貫通している。そ
の後、前記リベット５１〜５４を各貫通孔４７〜５０及
び７１〜７４に挿通させ、上下をかしめて一体に構成す
る。尚、Ａはバランスウエイトであり、上方の端面部材
６６と共にリベット５１にて回転子鉄心２６に固定され
ている。Then, the insertion holes 41 to 4 of the rotor core 26 are inserted.
After press-fitting the magnetic body 45 into the inside 4, the upper and lower end face members 6
6 and 67 are set to close the upper and lower sides of the insertion holes 41 to 44.
In this state, the through holes 47 to 50 and 71 to 74 penetrate the rotor core 26 and the end surface members 66 and 67 along the direction of the rotation axis 6. The holes 61 to 64 and 77 to 80 penetrate the rotor core 26 and the end surface members 66 and 67. After that, the rivets 51 to 54 are inserted into the through holes 47 to 50 and 71 to 74, and the upper and lower parts are caulked to be integrally formed. Incidentally, A is a balance weight, which is fixed to the rotor core 26 by the rivets 51 together with the upper end surface member 66.
【００３１】以上の構成で固定子２の固定子巻線７に直
流電流を通電すると、磁性体４５から生ずる磁界との反
発・吸引作用により、回転子５は固定子巻線７に印加さ
れる電圧と負荷とがバランスする速度（例えば印加電圧
を変えることによって５００ｒｐｍ〜１００００ｒｐｍ
の範囲で可変される）で前述の如く図４中時計回りに回
転する。回転子５の回転によって回転軸６は回転し、そ
れによって偏心部１１、１２が回転することにより、第
１及び第２のローラ１３、１４が回転して圧縮作用を発
揮する。When a direct current is applied to the stator winding 7 of the stator 2 having the above structure, the rotor 5 is applied to the stator winding 7 by the repulsion / suction action with the magnetic field generated by the magnetic body 45. Speed at which voltage and load are balanced (for example, 500 rpm to 10000 rpm by changing applied voltage)
It is variable within the range of 4). The rotation of the rotor 5 causes the rotation shaft 6 to rotate, which causes the eccentric portions 11 and 12 to rotate, whereby the first and second rollers 13 and 14 rotate to exert a compression action.
【００３２】このとき、回転軸６は前述の如く下部の軸
受部１７、１８によって軸支された片持ち式であるた
め、回転子５の回転軸６方向の寸法が大きくなると、前
述した如く特に高速回転時において大きな振れが発生
し、振動・騒音が増大すると共に、信頼性及び運転効率
が共に低下する。At this time, since the rotary shaft 6 is a cantilever type which is rotatably supported by the lower bearing portions 17 and 18, as described above, when the size of the rotor 5 in the rotary shaft 6 direction becomes large, as described above, Large vibrations occur at high speed, vibration and noise increase, and reliability and operating efficiency both decrease.
【００３３】しかしながら、本発明では回転子鉄心２６
内に設ける磁石材４５を、フェライト系磁石材に比して
残留磁束密度Ｂｒ及び保持力Ｈｃ共に大きく、磁気エネ
ルギー積もきわめて大きい希土類系磁石材としているの
で、従来の如きフェライト系磁石材を用いた場合に比し
て、所要の出力を維持しつつ、回転子鉄心２６の寸法を
縮小することができる。従って、回転子５の振れにより
発生する振動・騒音を低減し、信頼性及び運転効率の向
上を図ることができる。However, in the present invention, the rotor core 26
Since the magnet material 45 provided therein is a rare earth magnet material having a large residual magnetic flux density Br and a coercive force Hc and an extremely large magnetic energy product as compared with the ferrite magnet material, a conventional ferrite magnet material is used. Compared to the case where the above, the size of the rotor core 26 can be reduced while maintaining the required output. Therefore, it is possible to reduce vibration and noise generated by the vibration of the rotor 5, and to improve reliability and operation efficiency.
【００３４】特に、前述の如く回転子鉄心２６の直径Ｄ
と回転軸６方向の寸法Ｌとの比Ｌ／Ｄを１．１より小さ
くして、回転子鉄心２６の寸法縮小を専ら回転軸６方向
の寸法Ｌの縮小に当てたので、回転子鉄心２６の直径、
或いは圧縮機Ｃの密閉容器１の外径変更による製造設備
等の変更の必要性を解消することができるようになる。Particularly, as described above, the diameter D of the rotor core 26 is
Since the ratio L / D between the dimension L in the direction of the rotating shaft 6 is made smaller than 1.1 and the dimension reduction of the rotor core 26 is applied exclusively to the dimension L in the direction 6 of the rotating axis, the rotor core 26 The diameter of
Alternatively, it becomes possible to eliminate the need to change the manufacturing equipment or the like by changing the outer diameter of the closed container 1 of the compressor C.
【００３５】また、希土類系磁石材の係る特性を生かし
て、磁性体４５の厚さ寸法ｔと回転軸６方向の寸法ｌと
の比ｔ／ｌを０．０８より小さくすれば、比較的高価な
希土類系磁石材を用いたことによるコストの高騰を解
消、若しくは最小限に抑えることもできる。Further, if the ratio t / l of the thickness t of the magnetic body 45 and the dimension l in the direction of the rotating shaft 6 is made smaller than 0.08 by taking advantage of the characteristics of the rare earth magnet material, it is relatively expensive. It is also possible to eliminate or minimize the cost increase caused by using such rare earth magnet material.
【００３６】[0036]
【発明の効果】以上詳述した如く、本発明では積層され
た回転子鉄心内に設ける磁性体を希土類系磁石材とした
ので、従来の如きフェライト系磁石材等を用いた場合に
比して、所要の電動機出力を維持しつつ、回転子鉄心の
寸法を縮小することができるようになる。従って、回転
子の振れによって発生する振動・騒音を低減し、信頼
性、及び、運転効率の向上を図ることが可能となる。As described above in detail, in the present invention, the magnetic material provided in the laminated rotor iron core is the rare earth magnet material, so that it is more advantageous than the conventional ferrite magnet material. The size of the rotor core can be reduced while maintaining the required electric motor output. Therefore, it is possible to reduce the vibration and noise generated by the vibration of the rotor, and improve the reliability and the operation efficiency.
【００３７】特に、回転子鉄心の直径Ｄと回転軸方向の
寸法Ｌとの比Ｌ／Ｄを１．１より小さくして、回転子鉄
心の寸法縮小を専ら回転軸方向の寸法Ｌの縮小に当てた
ので、回転子鉄心の直径、或いは圧縮機の密閉容器の外
径変更による製造設備等の変更の必要性を解消すること
ができるものである。In particular, the ratio L / D between the diameter D of the rotor core and the dimension L in the direction of the rotation axis is made smaller than 1.1 to reduce the dimension of the rotor core exclusively in the direction L of the rotation axis. Since it is applied, it is possible to eliminate the need to change the diameter of the rotor core or the manufacturing equipment or the like by changing the outer diameter of the closed container of the compressor.
【００３８】[0038]
【図１】本発明を適用する圧縮機の縦断側面図である。FIG. 1 is a vertical sectional side view of a compressor to which the present invention is applied.
【図２】本発明の回転子の一部縦断側面図である。FIG. 2 is a partially longitudinal side view of the rotor of the present invention.
【図３】本発明の回転子の平面図である。FIG. 3 is a plan view of the rotor of the present invention.
【図４】本発明の回転子を構成する回転子用鉄板の平面
図である。FIG. 4 is a plan view of a rotor iron plate that constitutes the rotor of the present invention.
【図５】本発明の回転子を構成する回転子鉄心の側面図
である。FIG. 5 is a side view of a rotor core that constitutes the rotor of the present invention.
【図６】本発明の回転子を構成する磁性体の斜視図であ
る。FIG. 6 is a perspective view of a magnetic body forming the rotor of the present invention.
【図７】磁性体として使用される永久磁石の減磁曲線を
示す図である。FIG. 7 is a diagram showing a demagnetization curve of a permanent magnet used as a magnetic body.
Ｃ 圧縮機 ２ 電動機 ４ 固定子 ５ 回転子 ６ 回転軸 ２６ 回転子鉄心 ２７ 回転子用鉄板 ３２、３３、３４、３５ 切欠部 ４５ 磁性体 C compressor 2 electric motor 4 stator 5 rotor 6 rotation axes 26 rotor core 27 Iron plate for rotor 32, 33, 34, 35 Notches 45 Magnetic
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｈ０２Ｋ 1/30 Ｈ０２Ｋ 1/30 Ａ (72)発明者 五十嵐 恵司郎 大阪府守口市京阪本通２丁目５番５号 三洋電機株式会社内 (72)発明者 新井 和彦 大阪府守口市京阪本通２丁目５番５号 三洋電機株式会社内 (56)参考文献 特開 昭57−180359（ＪＰ，Ａ) 特開 平７−236239（ＪＰ，Ａ) 特開 平５−175038（ＪＰ，Ａ) 特開 平５−146103（ＪＰ，Ａ) 特開 平５−122877（ＪＰ，Ａ) 特開 平４−261346（ＪＰ，Ａ) 特開 平４−255439（ＪＰ，Ａ) 特開 平３−285538（ＪＰ，Ａ) 実開 平５−88165（ＪＰ，Ｕ) 実開 平５−4743（ＪＰ，Ｕ) 実開 平５−4741（ＪＰ，Ｕ) 実開 平４−128056（ＪＰ，Ｕ) 実開 平４−164（ＪＰ，Ｕ) 国際公開92／007409（ＷＯ，Ａ１) (58)調査した分野(Int.Cl.7，ＤＢ名) H02K 1/27 H02K 1/22 H02K 1/30 Front page continuation (51) Int.Cl. 7 Identification code FI H02K 1/30 H02K 1/30 A (72) Inventor Keijiro Igarashi 2-5-5 Keihan Hon-dori, Moriguchi City, Osaka Sanyo Electric Co., Ltd. (72) Inventor Kazuhiko Arai 2-5-5 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd. (56) Reference JP-A-57-180359 (JP, A) JP-A-7-236239 (JP, A) JP 5-175038 (JP, A) JP 5-146103 (JP, A) JP 5-122877 (JP, A) JP 4-261346 (JP, A) JP 4 -255439 (JP, A) JP-A-3-285538 (JP, A) Actual opening 5-88165 (JP, U) Actual opening 5-4743 (JP, U) Actual opening 5-4741 (JP, U) ) Actual Kaihei 4-128056 (JP, U) Actual Kaihei 4-164 (JP, U) International Publication 92/007409 (WO, A1) (58) Fields investigated (Int.Cl. 7 , DB name) H02K 1/27 H02K 1/22 H02K 1/30
Claims (3)
側にこの圧縮要素を回転駆動する電動機を備える圧縮機
用電動機の回転子において、積層された回転子鉄心内に
磁性体を有し、前記磁性体を複数の希土類系磁石材によ
り構成すると共に、これら磁性体の端部と端部との間に
は、前記回転子鉄心の外周から前記端部側に切欠かれた
切欠部を設け、回転子用鉄板を相互にかしめるかしめ部
の内側にオイル通路を形成し、前記回転子鉄心の直径Ｄ
と回転軸方向の寸法Ｌとの比Ｌ／Ｄを１．１より小さく
したことを特徴とする圧縮機用電動機の回転子。1. A compression element is provided on the lower side in a closed container, and
A compressor equipped with an electric motor for rotating the compression element on its side
In a rotor of an electric motor for use, a laminated rotor core has a magnetic body, and the magnetic body is composed of a plurality of rare earth magnet materials, and between the end portions of these magnetic bodies. A caulking part for caulking the rotor iron plates to each other by providing a notch part from the outer circumference of the rotor core to the end side.
An oil passage is formed inside the rotor, and the diameter D of the rotor core is
A rotor for a compressor electric motor, characterized in that a ratio L / D of the dimension L in the direction of the rotation axis is smaller than 1.1.
側にこの圧縮要素を回転駆動する電動機を備える圧縮機
用電動機の回転子において、積層された回転子鉄心内に
磁性体を有し、前記磁性体を複数の希土類系磁石材によ
り構成すると共に、これら磁性体の端部と端部との間に
は、前記回転子鉄心の外周から前記端部側に切欠いて突
極部を形成するための切欠部を設け、この突極部に前記
磁性体を挿入すると共に、回転子用鉄板を相互にかしめ
るかしめ部の内側にオイル通路を形成し、前記回転子鉄
心の直径Ｄと回転軸方向の寸法Ｌとの比Ｌ／Ｄを１．１
より小さくしたことを特徴とする圧縮機用電動機の回転
子。2. A compression element is provided on the lower side in a closed container, and
A compressor equipped with an electric motor for rotating the compression element on its side
In a rotor of an electric motor for use, a laminated rotor core has a magnetic body, and the magnetic body is composed of a plurality of rare earth magnet materials, and between the end portions of these magnetic bodies. A notch is formed from the outer circumference of the rotor core to the end side to form a salient pole portion, the magnetic body is inserted into the salient pole portion, and the rotor iron plates are caulked with each other.
An oil passage is formed inside the caulking portion, and the ratio L / D between the diameter D of the rotor core and the dimension L in the rotation axis direction is 1.1.
A rotor for a compressor electric motor characterized by being made smaller.
側にこの圧縮要素を回転駆動する電動機を備える圧縮機
用電動機の回転子において、積層された回転子鉄心内に
磁性体を有し、前記磁性体を複数の希土類系磁石材によ
り構成すると共に、これら磁性体の端部と端部との間に
は、前記回転子鉄心の外周から前記端部側に切欠かれた
切欠部を設け、回転子用鉄板を相互にかしめるかしめ部
の内側にオイル通路を形成したことを特徴とする圧縮機
用電動機の回転子。3. A hermetically sealed container having a compression element on the lower side,
A compressor equipped with an electric motor for rotating the compression element on its side
In a rotor of an electric motor for use, a laminated rotor core has a magnetic body, and the magnetic body is composed of a plurality of rare earth magnet materials, and between the end portions of these magnetic bodies. A caulking part for caulking the rotor iron plates to each other by providing a notch part from the outer circumference of the rotor core to the end side.
A rotor for an electric motor for a compressor, characterized in that an oil passage is formed inside the rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000327404A JP3485880B2 (en) | 1993-12-28 | 2000-10-26 | Rotor of motor for compressor |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5-350444 | 1993-12-28 | ||
| JP35044493 | 1993-12-28 | ||
| JP2000327404A JP3485880B2 (en) | 1993-12-28 | 2000-10-26 | Rotor of motor for compressor |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6334434A Division JPH07236239A (en) | 1993-12-28 | 1994-12-19 | Rotor for compressor motor |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001210499A Division JP3485909B2 (en) | 1993-12-28 | 2001-07-11 | Hermetic compressor |
| JP2001210500A Division JP3485910B2 (en) | 1993-12-28 | 2001-07-11 | Hermetic compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001161042A JP2001161042A (en) | 2001-06-12 |
| JP3485880B2 true JP3485880B2 (en) | 2004-01-13 |
Family
ID=26579199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000327404A Expired - Fee Related JP3485880B2 (en) | 1993-12-28 | 2000-10-26 | Rotor of motor for compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3485880B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4815204B2 (en) * | 2005-12-01 | 2011-11-16 | アイチエレック株式会社 | Permanent magnet rotating machine and compressor |
| JP4274199B2 (en) * | 2006-05-24 | 2009-06-03 | ダイキン工業株式会社 | Field element core |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57180359A (en) * | 1981-04-30 | 1982-11-06 | Hitachi Ltd | Permanent magnet synchronous motor |
| JPH03285538A (en) * | 1990-03-30 | 1991-12-16 | Takaoka Electric Mfg Co Ltd | Manufacture of rotor for motor |
| JPH04164U (en) * | 1990-04-13 | 1992-01-06 | ||
| WO1992007409A1 (en) * | 1990-10-19 | 1992-04-30 | Seiko Epson Corporation | Rotor of brushless motor and its manufacturing method |
| JPH04261346A (en) * | 1991-01-30 | 1992-09-17 | Matsushita Electric Works Ltd | Rotor for rotary solenoid |
| JPH04255439A (en) * | 1991-02-06 | 1992-09-10 | Fanuc Ltd | Radial type rotor structure |
| JP2527067Y2 (en) * | 1991-03-06 | 1997-02-26 | オークマ株式会社 | Motor rotor |
| JP2543165Y2 (en) * | 1991-06-28 | 1997-08-06 | 株式会社東芝 | Permanent magnet rotor |
| JPH054743U (en) * | 1991-07-05 | 1993-01-22 | 株式会社東芝 | Permanent magnet rotor |
| JPH05122877A (en) * | 1991-10-30 | 1993-05-18 | Matsushita Electric Ind Co Ltd | Rotor for permanent magnet type synchronous motor |
| JPH05146103A (en) * | 1991-11-21 | 1993-06-11 | Seiko Epson Corp | Permanent magnet rotor |
| JP3012067B2 (en) * | 1991-12-26 | 2000-02-21 | 川崎製鉄株式会社 | Extremely anisotropic cylindrical magnet |
| JP2550980Y2 (en) * | 1992-04-24 | 1997-10-15 | オークマ株式会社 | Motor rotor |
| JPH07236239A (en) * | 1993-12-28 | 1995-09-05 | Sanyo Electric Co Ltd | Rotor for compressor motor |
-
2000
- 2000-10-26 JP JP2000327404A patent/JP3485880B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001161042A (en) | 2001-06-12 |
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