JPH0236743A - Rotor and manufacture thereof - Google Patents
Rotor and manufacture thereofInfo
- Publication number
- JPH0236743A JPH0236743A JP63186323A JP18632388A JPH0236743A JP H0236743 A JPH0236743 A JP H0236743A JP 63186323 A JP63186323 A JP 63186323A JP 18632388 A JP18632388 A JP 18632388A JP H0236743 A JPH0236743 A JP H0236743A
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- permanent magnet
- metal plate
- rotor core
- core
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 29
- 239000002184 metal Substances 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000004512 die casting Methods 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims 1
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 3
- 239000010935 stainless steel Substances 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 238000003466 welding Methods 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
- 238000005266 casting Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
【発明の詳細な説明】
(イ)産業上の利用分野
本発明は永久磁石を有する回転子、及び回転子の製造方
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a rotor having permanent magnets and a method for manufacturing the rotor.
(ロ)従来の技術
一般に永久磁石を有する従来の回転子としては、特開昭
58−151855号公報に記載されているようなもの
があった。この公報に記載されたものは、回転子鉄心と
永久磁石とを円筒カバー内に挿入した後ダイカストで一
体に成形したものであり、この円筒カバーによって回転
時の永久墓石の剥離や永久磁石の欠けを防止するもので
あった。(B) Prior Art In general, a conventional rotor having a permanent magnet is described in Japanese Patent Application Laid-Open No. 58-151855. The device described in this publication is one in which the rotor core and permanent magnets are inserted into a cylindrical cover and then integrally molded by die-casting. The purpose was to prevent
(ハ)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回転子で、円筒カバーには
強度の関係上ある程度の厚さが必要であり、この円筒カ
バーに固定子からの磁束が交番することによって渦電流
が流れ鉄損の増加原因となっていた。(c) Problems to be Solved by the Invention In the conventional rotor configured in this way, the cylindrical cover needs to have a certain thickness for strength reasons, and the magnetic flux from the stator is alternately applied to the cylindrical cover. This caused eddy currents to flow, causing an increase in iron loss.
斯かる問題点に鑑み、本発明は渦電流の発生による鉄損
の増加を抑制した回転子及び回転子の製造方法を提供す
るものである。In view of these problems, the present invention provides a rotor and a method for manufacturing the rotor that suppresses an increase in core loss due to the generation of eddy currents.
(ニ)課題を解決するための手段
本発明は回転子鉄心と、この鉄心の表面に取付けられた
複数個の永久磁石片と、この永久磁石片の外周部を覆う
外周部保護材とを備えた回転子の製造において、回転子
鉄心の表面に永久磁石片を取付け、この永久磁石の外周
部に非磁性の薄い金属板を1回以上、重ね合せて巻いた
後、この回転子鉄心、永久磁石片、非磁性の薄い金属板
をダイカストで一体に形成したものである。(d) Means for Solving the Problems The present invention includes a rotor core, a plurality of permanent magnet pieces attached to the surface of the core, and an outer circumference protection material that covers the outer circumference of the permanent magnet pieces. In manufacturing rotors, permanent magnet pieces are attached to the surface of the rotor core, and non-magnetic thin metal plates are wrapped around the outer periphery of the permanent magnet one or more times, and then the rotor core is permanently It is made by die-casting a magnet piece and a non-magnetic thin metal plate.
(1作用
このように構成された回転子及び回転子の製造方法を用
いると、永久磁石の外周に設ける金属板を薄くでき渦電
流の発生を抑制できる。(1) By using the rotor and rotor manufacturing method configured as described above, the metal plate provided around the outer periphery of the permanent magnet can be made thinner, and the generation of eddy currents can be suppressed.
(へ)実施例 以下本発明の実施例を図面に基づいて説明する。(f) Example Embodiments of the present invention will be described below based on the drawings.
第1図は本発明による回転子を用いた圧縮機の縦断面図
であり、図中1は密閉容器で、この容器内には上側に1
動要素2が、下側にこの電動要素の回転軸3によって駆
動きれる回転圧縮要素4が夫々収納きれている。電動要
素2は密閉容器1の内壁に固着された固定子5と、この
固定子の内部でエアギャップ6を介して回転軸3に挿着
された回転子7とにより構成されている。第2図、第3
図は回転子7の縦断面図及び横断面図であり、回転子7
は回転子鉄心8の外周に接着剤によって複数個の永久磁
石片9を取付け、この永久磁石片の外周に非磁性体のス
テンレスで形成された金属板10を巻き、端部を溶接や
レザービーム等で接合した後、鋳込型11でダイカスト
成形されて作られている。回転子鉄心8には軸方向に貫
通する貫通孔すなわち縦孔20が設けられている。この
回転子鉄心8の外周には永久磁石9が約90度づつ4極
設けられている。永久磁石9どうしの合せ目には隙間2
2ができ、この隙間22と合対向する回転子鉄心9の外
周には切欠21が設けられている。また金属板10には
、金属板10の回り止め用に切欠23を設けている。こ
の切欠23にダイカスト用の溶湯を流した後に固めれば
この金属板10の回り止めになる。この時、この切欠2
3の位置を永久磁石9の合せ目の空間22、すなわち永
久磁石9の極分離位置に合せている。これによって回転
子7のダイカスト終了後にも極分離位置がρの切欠23
から容易に確認することができ、着磁時の位置合せが容
易になる。また13゜14は夫々回転子7のエンドリン
グであり切欠21、隙間22を介してつながっている。FIG. 1 is a longitudinal sectional view of a compressor using a rotor according to the present invention. In the figure, 1 is a closed container, and inside this container there is a
A rotary compression element 4 that can be driven by a rotary shaft 3 of the electric element is housed in the lower side of the dynamic element 2, respectively. The electric element 2 includes a stator 5 fixed to the inner wall of the closed container 1, and a rotor 7 inserted into the rotating shaft 3 through an air gap 6 inside the stator. Figures 2 and 3
The figures are a longitudinal cross-sectional view and a cross-sectional view of the rotor 7.
A plurality of permanent magnet pieces 9 are attached to the outer periphery of the rotor core 8 with adhesive, a metal plate 10 made of non-magnetic stainless steel is wrapped around the outer periphery of the permanent magnet pieces, and the ends are welded or laser beamed. After joining with etc., die-casting is performed using a casting mold 11. The rotor core 8 is provided with a through hole, that is, a vertical hole 20 that penetrates in the axial direction. On the outer periphery of this rotor core 8, four permanent magnets 9 are provided with four poles arranged at approximately 90 degrees each. There is a gap 2 between the permanent magnets 9.
2 is formed, and a notch 21 is provided on the outer periphery of the rotor core 9 that faces and meets this gap 22. Further, the metal plate 10 is provided with a notch 23 for preventing the metal plate 10 from rotating. If molten metal for die casting is poured into the notch 23 and then solidified, the metal plate 10 will be prevented from rotating. At this time, this notch 2
3 is aligned with the space 22 between the joints of the permanent magnets 9, that is, the pole separation position of the permanent magnets 9. As a result, even after die-casting of the rotor 7, the pole separation position remains at the notch 23 at ρ.
It can be easily confirmed from the above, and alignment during magnetization is facilitated. Further, 13° and 14 are end rings of the rotor 7, which are connected via a notch 21 and a gap 22.
このエンドリング13.14は第4図に示すような金型
を用いてアルミや亜鉛等の溶湯を湯口19から注入する
ことによって一体にダイカスト成形される。The end rings 13, 14 are integrally die-cast by injecting molten metal such as aluminum or zinc from the sprue 19 using a mold as shown in FIG.
この図において、鋳込型11は回転子鉄心8の外周を覆
う外筒型12と、この外筒型の両側に設けられたエンド
リング13.14を形成する環状空間15.16を有す
るエンドリング金型17.18とで形成されている。1
9はエンドリング金型17に形成きれた湯口であり、永
久磁石9の合せ目の隙間22の上部に位置している。ま
た環状空間15.16の内径は金属板10の外周と一致
させている。これによって回転子7を鋳込型11に納め
る際、回転子7の長さ方向(軸方向)の仕上り寸法精度
の許容幅が大きくなる。すなわち、この回転子7を型1
1に納める際の寸法加工が不要になる。In this figure, the casting mold 11 includes an outer cylindrical mold 12 that covers the outer periphery of the rotor core 8, and an end ring having an annular space 15.16 forming an end ring 13.14 provided on both sides of the outer cylindrical mold. It is formed by molds 17 and 18. 1
Reference numeral 9 denotes a sprue completely formed in the end ring mold 17, and is located above the gap 22 between the permanent magnets 9. Further, the inner diameter of the annular space 15 and 16 is made to coincide with the outer circumference of the metal plate 10. As a result, when the rotor 7 is placed in the casting mold 11, the allowable range of finishing dimensional accuracy in the length direction (axial direction) of the rotor 7 is increased. That is, this rotor 7 is of type 1.
There is no need for dimensional processing when fitting it into 1.
このようにして回転子7を鋳込型11に納めた後、湯口
19より溶湯を注入すると、まず溶湯は隙間22、切欠
21を通って回転子7の反対側へ回り込むと同時に永久
磁石9を金属板10に押し付ける。ある程度湯が回り湯
圧が高くなると、次に溶湯は回転子鉄心8の縦孔20を
通って流れエンドリング13.14を形作り、切欠21
の湯は隣接する永久磁石片9の隙間22に充満し、この
永久磁石片の回止め材を形作っている。そして湯が固ま
った後、鋳込型11から取出し着磁することにより回転
子7は完成する。After the rotor 7 is placed in the casting mold 11 in this way, when molten metal is injected from the sprue 19, the molten metal first passes through the gap 22 and the notch 21 and goes around to the opposite side of the rotor 7, and at the same time hits the permanent magnet 9. Press it against the metal plate 10. When the molten metal flows to a certain extent and the molten metal pressure increases, the molten metal flows through the vertical holes 20 of the rotor core 8, forming the end rings 13 and 14, and forming the notches 21.
The hot water fills the gaps 22 between adjacent permanent magnet pieces 9, forming a rotation preventing material for the permanent magnet pieces. After the hot water has solidified, it is taken out from the casting mold 11 and magnetized to complete the rotor 7.
尚、第5図は前記実施例で用いた金属板10の斜視図で
あり、この金属板10としては例えばtO、1mmの板
厚を有するステンレス板を2回巻いている、また、この
金属板10の両面にはコーティングを行なってもよい。Incidentally, FIG. 5 is a perspective view of the metal plate 10 used in the above embodiment, and the metal plate 10 is, for example, a stainless steel plate having a thickness of 1 mm wound twice. Both sides of 10 may be coated.
このように構成された回転子では金属板10の板厚が薄
い分湯電流の発生が減って電動機の運転効率が良くなる
。尚、従来の技術に記載された円筒カバーの板厚は一般
にtl、0〜to、5mmである。In the rotor configured in this manner, the thin metal plate 10 reduces the generation of hot water current, improving the operating efficiency of the motor. Incidentally, the plate thickness of the cylindrical cover described in the prior art is generally 0 to 5 mm.
(ト)発明の効果
本発明は、永久磁石片の外周に非磁性の薄い金属板を1
回以上重ね合せて巻いたので、永久磁石片の外周に設け
る金属板の板厚が薄くなり、渦電流の発生を抑制するこ
とができ、渦電流による鉄損を低減して電動機の効率を
向上させることができる。(g) Effects of the invention The present invention provides a non-magnetic thin metal plate on the outer periphery of a permanent magnet piece.
By overlapping the coils more than once, the thickness of the metal plate provided around the outer periphery of the permanent magnet piece becomes thinner, which suppresses the generation of eddy currents, reduces iron loss caused by eddy currents, and improves the efficiency of the motor. can be done.
第1図は本発明の実施例を用いた圧縮機の断面図、第2
図は第1図に示した回転子の半断面図、第3図は第2図
に示した回転子の■−■断面図、第4図は回転子鉄心に
湯を注入する鋳込型の構成を示す断面図、第5図は第3
図に示した金属板の斜視図である。
7・・・回転子、 8・・・回転子鉄心、石片、 1
0・・・金属板。
9・・・永久磁Fig. 1 is a sectional view of a compressor using an embodiment of the present invention;
The figure is a half-sectional view of the rotor shown in Fig. 1, Fig. 3 is a cross-sectional view of the rotor shown in Fig. 2, and Fig. 4 shows a casting mold for pouring hot water into the rotor core. A sectional view showing the configuration, Figure 5 is the third
It is a perspective view of the metal plate shown in the figure. 7...Rotor, 8...Rotor core, stone piece, 1
0...Metal plate. 9...Permanent magnetism
Claims (3)
数個の永久磁石片と、この永久磁石片の外周部を覆う外
周部保護材とを備えた回転子の製造方法において、回転
子鉄心の表面に永久磁石片を取付け、この永久磁石片の
外周部に非磁性の薄い金属板を1回以上、重ね合せて巻
いた後、この回転子鉄心、永久磁石片、非磁性の薄い金
属板をダイカストで一体に形成したことを特徴とする回
転子の製造方法。(1) In a method for manufacturing a rotor comprising a rotor core, a plurality of permanent magnet pieces attached to the surface of the core, and an outer circumference protection material that covers the outer circumference of the permanent magnet pieces, the rotor A permanent magnet piece is attached to the surface of the iron core, and a non-magnetic thin metal plate is wrapped around the outer circumference of the permanent magnet piece one or more times, and then the rotor core, permanent magnet piece, and non-magnetic thin metal plate are wrapped. A method for manufacturing a rotor, characterized in that plates are integrally formed by die-casting.
ることを特徴とする請求項(1)に記載の回転子の製造
方法。(2) The method for manufacturing a rotor according to claim (1), characterized in that both upper and lower surfaces of the metal plate are coated with an insulating film.
複数の永久磁石と、この永久磁石の外周に重ね合せて巻
く非磁性の金属板と、回転子鉄心、永久磁石、金属板を
一体に成形するダイカストとを備えたことを特徴とする
回転子。(3) A rotor core, a plurality of permanent magnets attached to the outer periphery of the rotor core, a non-magnetic metal plate wrapped around the outer periphery of the permanent magnet, and the rotor core, permanent magnets, and metal plate integrated A rotor characterized in that it is equipped with a die-cast molding.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63186323A JPH0236743A (en) | 1988-07-26 | 1988-07-26 | Rotor and manufacture thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63186323A JPH0236743A (en) | 1988-07-26 | 1988-07-26 | Rotor and manufacture thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0236743A true JPH0236743A (en) | 1990-02-06 |
Family
ID=16186327
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63186323A Pending JPH0236743A (en) | 1988-07-26 | 1988-07-26 | Rotor and manufacture thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0236743A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100430262B1 (en) * | 1996-03-15 | 2004-07-30 | 엘지전자 주식회사 | Sensorless brushless direct current motor including conductor plate attached on surface of rotor |
-
1988
- 1988-07-26 JP JP63186323A patent/JPH0236743A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100430262B1 (en) * | 1996-03-15 | 2004-07-30 | 엘지전자 주식회사 | Sensorless brushless direct current motor including conductor plate attached on surface of rotor |
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