JPH027844A - Rotor provided with permanent magnet - Google Patents
Rotor provided with permanent magnetInfo
- Publication number
- JPH027844A JPH027844A JP63276531A JP27653188A JPH027844A JP H027844 A JPH027844 A JP H027844A JP 63276531 A JP63276531 A JP 63276531A JP 27653188 A JP27653188 A JP 27653188A JP H027844 A JPH027844 A JP H027844A
- Authority
- JP
- Japan
- Prior art keywords
- rotor core
- permanent magnets
- permanent magnet
- magnetic material
- retaining ring
- 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
- 239000000696 magnetic material Substances 0.000 claims abstract description 15
- 239000000853 adhesive Substances 0.000 claims abstract description 6
- 230000001070 adhesive effect Effects 0.000 claims abstract description 6
- 125000006850 spacer group Chemical group 0.000 claims description 9
- 230000004907 flux Effects 0.000 abstract description 10
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material 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〕
この発明は回転電機の永久磁石付き回転子において、回
転子鉄心を小形化しかつ機械的強度を増すごとができる
ようにしたものに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotor with permanent magnets for a rotating electric machine in which the rotor core can be made smaller and the mechanical strength can be increased.
回転電機の永久磁石付き回転子の従来例を第２図にもと
づいて説明する。この図において、磁性材からなる円筒
状の回転子鉄心１が磁極を形成する複数の永久磁石２を
介して回転軸３に固着されている。前記永久磁石２は方
形断面の棒状で、径方向に交互に反対方向に着磁されて
いる。前記回転軸３は鉄心支持部の断面形状が角形で、
永久磁石２との接合部および永久磁石２と回転子鉄心１
の接合部は接着剤等で固着されている。前記回転子鉄心
１は隣接する磁極の中間位置に内周側から適当な深さの
スリット４を設けて隣接する磁極に磁束が短絡して流れ
るのを防止するようになっている。A conventional example of a rotor with permanent magnets for a rotating electrical machine will be explained based on FIG. In this figure, a cylindrical rotor core 1 made of a magnetic material is fixed to a rotating shaft 3 via a plurality of permanent magnets 2 forming magnetic poles. The permanent magnets 2 are rod-shaped with a rectangular cross section, and are magnetized alternately in opposite directions in the radial direction. The rotating shaft 3 has a core supporting portion having a rectangular cross-sectional shape;
Joint part with permanent magnet 2 and permanent magnet 2 and rotor core 1
The joints are fixed with adhesive or the like. The rotor core 1 is provided with a slit 4 of an appropriate depth from the inner periphery at an intermediate position between adjacent magnetic poles to prevent magnetic flux from short-circuiting and flowing to adjacent magnetic poles.
前記構造では磁束の流れる方向の永久磁石２の断面積を
大きくしようとすると回転子鉄心１が大形化し、またス
リット４により回転子鉄心１の機械的強度が低下すると
いう多くの欠点があった。The structure described above has many drawbacks, such as increasing the cross-sectional area of the permanent magnet 2 in the direction of magnetic flux flow, increasing the size of the rotor core 1, and reducing the mechanical strength of the rotor core 1 due to the slits 4. .
この発明は前記の欠点を除去するために、回転子鉄心を
小形化しかつ機械的強度を増すことができるようにした
回転電機の永久磁石付き回転子を提供することを目的と
する。SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, it is an object of the present invention to provide a rotor with permanent magnets for a rotating electric machine, which is capable of downsizing the rotor core and increasing mechanical strength.
この発明は前記の目的を達成するために、請求項１）記
載のものでは円筒状回転子鉄心１１の外周に永久磁石１
２を円周方向に複数配設するとともに、その外側に非磁
性材からなる保持リング１３をはめ込んで永久磁石１２
を固定し、請求項２）記載のものでは円筒状回転子鉄心
１１の外周に永久磁石２２とこれより径方向の厚さがわ
ずかに厚い非磁性材からなるスペーサ２３をそれぞれ複
数円周方向に交互に配設するとともに、これらの外側に
非磁性材からなる保持リング１３をはめ込み、前記永久
磁石２２を回転子鉄心１１との間にすきまｇを設けて保
持リング１３の内周に接着剤等で固着するようにしたも
のである。In order to achieve the above object, the present invention provides a permanent magnet 1 on the outer periphery of the cylindrical rotor core 11.
A plurality of permanent magnets 2 are arranged in the circumferential direction, and a retaining ring 13 made of a non-magnetic material is fitted on the outside of the permanent magnet 12.
In the structure according to claim 2, a plurality of permanent magnets 22 and spacers 23 made of a non-magnetic material, which are slightly thicker in the radial direction than the permanent magnets 22, are arranged in the circumferential direction on the outer periphery of the cylindrical rotor core 11. At the same time, a retaining ring 13 made of a non-magnetic material is fitted on the outside of these, a gap g is provided between the permanent magnets 22 and the rotor core 11, and an adhesive or the like is applied to the inner circumference of the retaining ring 13. It is designed to be fixed in place.
永久磁石１２．２２を回転子鉄心１１の外周に配設する
ことにより磁束の流れる方向の断面積を大きくすること
ができるので回転子鉄心１１を小形化することができ、
また保持リング１３を非磁性にして従来例で説明したス
リット４を不要としたので磁極間の短絡磁束流を防止し
かつ回転子鉄心１１の機械的強度を増すことができる。By arranging the permanent magnets 12, 22 on the outer periphery of the rotor core 11, the cross-sectional area in the direction of magnetic flux flow can be increased, so the rotor core 11 can be made smaller.
Furthermore, since the retaining ring 13 is made non-magnetic and the slit 4 described in the conventional example is not required, it is possible to prevent a short-circuit magnetic flux flow between the magnetic poles and increase the mechanical strength of the rotor core 11.
第１図はこの発明の請求項１）に対応する実施例を示す
もので、図示しない回転軸に嵌着した磁性材からなる円
筒状回転子鉄心１１の外周に永久磁石１２が円周方向に
複数配設されている。この永久磁石１２は回転子鉄心１
１の外周に密接するように断面形状が弓形に湾曲した板
状に形成され、径方向に交互に反対方向に着磁されてい
る。前記永久磁石１２は外側に非磁性材からなる保持リ
ング１３をはめ込んで固定され、保持リング１３および
回転子鉄心１１との接合部はそれぞれ接着剤等で固着さ
れている。FIG. 1 shows an embodiment corresponding to claim 1) of the present invention, in which permanent magnets 12 are arranged circumferentially around the outer periphery of a cylindrical rotor core 11 made of a magnetic material fitted onto a rotating shaft (not shown). There are multiple locations. This permanent magnet 12 is the rotor core 1
The magnets are formed into a plate shape with an arcuate cross-sectional shape so as to be in close contact with the outer periphery of the magnet 1, and are magnetized alternately in opposite directions in the radial direction. The permanent magnet 12 is fixed by fitting a retaining ring 13 made of a non-magnetic material on the outside, and the joint portions of the retaining ring 13 and the rotor core 11 are each fixed with an adhesive or the like.
前記実施例によれば永久磁石１２の磁束の流れる方向の
断面積を大きくすることができるので回転子鉄心１１を
小形化することができ、また保持リング１３を非磁性に
して従来例で説明したスリット４を不要としたので磁極
間の短絡磁束流を防止しかつ回転子鉄心１１の機械的強
度を増すことができる。前記回転子鉄心１１は丸棒を加
工して塊状鉄心とすることもでき、このようにすればさ
らに機械的強度を増すことができる。According to the embodiment, the cross-sectional area of the permanent magnet 12 in the direction of magnetic flux flow can be increased, so the rotor core 11 can be made smaller, and the retaining ring 13 can be made non-magnetic, unlike the conventional example. Since the slit 4 is not required, it is possible to prevent a short circuit magnetic flux flow between the magnetic poles and increase the mechanical strength of the rotor core 11. The rotor core 11 can also be made into a block core by processing a round bar, and in this way, the mechanical strength can be further increased.
第３図はこの発明の請求項２）に対応する実施例を示す
もので、図示しない回転軸に嵌着した磁性材からなる円
筒状回転子鉄心１１の外周に永久磁石２２とこれより径
方向の厚さがわずかに厚い非磁性材からなるスペーサ２
３とがそれぞれ複数円周方向に交互に配設されている。FIG. 3 shows an embodiment corresponding to claim 2) of the present invention, in which permanent magnets 22 are attached to the outer periphery of a cylindrical rotor core 11 made of a magnetic material fitted onto a rotating shaft (not shown). Spacer 2 made of a non-magnetic material with a slightly thicker
3 are arranged alternately in the circumferential direction.
この永久磁石２２とスペーサ２３は断面形状が回転子鉄
心１１の外周に沿う弓形に湾曲した板状に形成され、複
数の永久磁石２２は径方向に交互に反対方向に着磁され
ている。前記永久磁石２２とスペーサ２３の外側には非
磁性材からなる保持リング１３がはめ込まれ、永久磁石
２２と保持リング１３の内周およびスペーサ２３と保持
リング１３、回転子鉄心１１のそれぞれ接合部は密接し
て接着剤等で固着されている。すなわち永久磁石２２と
回転子鉄心１１の間には径方向の磁束の流れに支障のな
い程度のわずかなすきまｇが設けられ、永久磁石２２の
側縁部と保持リング１３は密接している。The permanent magnets 22 and the spacers 23 are formed into a plate shape whose cross section is curved in an arc along the outer periphery of the rotor core 11, and the plurality of permanent magnets 22 are magnetized alternately in opposite directions in the radial direction. A retaining ring 13 made of a non-magnetic material is fitted on the outside of the permanent magnet 22 and spacer 23, and the inner periphery of the permanent magnet 22 and retaining ring 13 and the joints of the spacer 23, retaining ring 13, and rotor core 11 are They are closely attached and fixed with adhesive or the like. That is, a slight gap g is provided between the permanent magnet 22 and the rotor core 11 so as not to hinder the flow of magnetic flux in the radial direction, and the side edge of the permanent magnet 22 and the retaining ring 13 are in close contact with each other.
前記実施例によれば永久磁石２２の磁束の流れる方向の
断面積を大きくすることができるので回転子鉄心１１を
小形化することができ、また保持リング１３とスペーサ
２３を非磁性にして従来例で説明したスリット４を不要
としたので磁極間の短絡磁束流を防止しかつ回転子鉄心
１１の機械的強度を増すことができる。さらに保持リン
グ１３の締め圧力がスペーサ２３を介し回転子鉄心１１
に加わって機械的強度が比較的小さくかつもろい材質の
永久磁石２２に加わらないようにしたので、永久磁石２
２の損傷を減らすことができる。前記回転子鉄心１１は
丸棒を加工して塊状鉄心とすることもでき、このように
すればさらに機械的強度を増すことができる。According to the embodiment, the cross-sectional area of the permanent magnet 22 in the direction of magnetic flux flow can be increased, so the rotor core 11 can be made smaller, and the retaining ring 13 and spacer 23 are made non-magnetic, compared to the conventional example. Since the slit 4 described in 1 is not required, short-circuit magnetic flux flow between the magnetic poles can be prevented and the mechanical strength of the rotor core 11 can be increased. Furthermore, the tightening pressure of the retaining ring 13 is applied to the rotor core 11 through the spacer 23.
In addition, the mechanical strength of the permanent magnet 2 is made of a relatively small and brittle material.
2 damage can be reduced. The rotor core 11 can also be made into a block core by processing a round bar, and in this way, the mechanical strength can be further increased.
この発明によれば回転電機の永久磁石付き回転子におい
て、円筒状回転子鉄心の外周に永久磁石を円周方向に複
数配設し、その外側に非磁性保持リングをはめ込んで永
久磁石を固定するようにしたので、永久磁石の磁路断面
積を大きくして回転子鉄心を小形化しかつ機械的強度を
増すことができるという効果が得られる。According to this invention, in a rotor with permanent magnets for a rotating electric machine, a plurality of permanent magnets are arranged circumferentially around the outer periphery of a cylindrical rotor core, and a non-magnetic retaining ring is fitted on the outside to fix the permanent magnets. As a result, it is possible to increase the magnetic path cross-sectional area of the permanent magnet, thereby reducing the size of the rotor core and increasing the mechanical strength.
第１図はこの発明の請求項１）に対応する実施例の縦断
面図、第２図は従来例の縦断面図、第３図はこの発明の
請求項２）に対応する実施例の縦断面図である。
１１・・・回転子鉄心、１２．２２・・・永久磁石、１
３・・・保持リング、２３・・・スペーサ、ｇ・・・す
きま。Fig. 1 is a longitudinal sectional view of an embodiment corresponding to claim 1) of the present invention, Fig. 2 is a longitudinal sectional view of a conventional example, and Fig. 3 is a longitudinal sectional view of an embodiment corresponding to claim 2) of the present invention. It is a front view. 11... Rotor core, 12.22... Permanent magnet, 1
3...Retaining ring, 23...Spacer, g...Gap.
Claims (1)
成する永久磁石を円周方向に複数配設するとともに、そ
の外側に非磁性材からなる保持リングをはめ込んで永久
磁石を固定したことを特徴とする永久磁石付き回転子。 ２）磁性材からなる円筒状回転子鉄心の外周に磁極を形
成する永久磁石とこれより径方向の厚さがわずかに厚い
非磁性材からなるスペーサをそれぞれ複数円周方向に交
互に配設するとともに、これらの外側に非磁性材からな
る保持リングをはめ込み、前記永久磁石を回転子鉄心と
の間にすきまを設けて保持リングの内周に接着剤等で固
着したことを特徴とする永久磁石付き回転子。[Claims] 1) A plurality of permanent magnets forming magnetic poles are arranged circumferentially around the outer periphery of a cylindrical rotor core made of a magnetic material, and a retaining ring made of a non-magnetic material is fitted on the outside of the permanent magnets. A rotor with permanent magnets, characterized by fixed permanent magnets. 2) A plurality of permanent magnets that form magnetic poles on the outer periphery of a cylindrical rotor core made of magnetic material and spacers made of non-magnetic material that are slightly thicker in the radial direction are arranged alternately in the circumferential direction. A permanent magnet characterized in that a retaining ring made of a non-magnetic material is fitted on the outside of these permanent magnets, and the permanent magnet is fixed to the inner circumference of the retaining ring with an adhesive or the like with a gap provided between the permanent magnet and the rotor core. rotor with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63276531A JPH027844A (en) | 1987-11-26 | 1988-11-01 | Rotor provided with permanent magnet |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-297943 | 1987-11-26 | ||
| JP29794387 | 1987-11-26 | ||
| JP63276531A JPH027844A (en) | 1987-11-26 | 1988-11-01 | Rotor provided with permanent magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH027844A true JPH027844A (en) | 1990-01-11 |
Family
ID=26551959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63276531A Pending JPH027844A (en) | 1987-11-26 | 1988-11-01 | Rotor provided with permanent magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH027844A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016143008A1 (en) * | 2015-03-06 | 2016-09-15 | 三菱電機株式会社 | Rotor of rotary electric machine, and method for manufacturing rotor of rotary electric machine |
| WO2021182088A1 (en) * | 2020-03-10 | 2021-09-16 | 株式会社ミツバ | Permanent magnet synchronous motor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49117918A (en) * | 1973-03-19 | 1974-11-11 | ||
| JPS5250507A (en) * | 1975-10-20 | 1977-04-22 | Hitachi Metals Ltd | Magnetic rotor |
| JPS61116955A (en) * | 1984-11-08 | 1986-06-04 | Matsushita Electric Ind Co Ltd | Rotor for motor of magnet rotation type |
-
1988
- 1988-11-01 JP JP63276531A patent/JPH027844A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49117918A (en) * | 1973-03-19 | 1974-11-11 | ||
| JPS5250507A (en) * | 1975-10-20 | 1977-04-22 | Hitachi Metals Ltd | Magnetic rotor |
| JPS61116955A (en) * | 1984-11-08 | 1986-06-04 | Matsushita Electric Ind Co Ltd | Rotor for motor of magnet rotation type |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016143008A1 (en) * | 2015-03-06 | 2016-09-15 | 三菱電機株式会社 | Rotor of rotary electric machine, and method for manufacturing rotor of rotary electric machine |
| JP6049897B1 (en) * | 2015-03-06 | 2016-12-21 | 三菱電機株式会社 | Rotating electric machine rotor and method of manufacturing rotating electric machine rotor |
| CN107408849A (en) * | 2015-03-06 | 2017-11-28 | 三菱电机株式会社 | The manufacture method of the rotor of electric rotating machine and the rotor of electric rotating machine |
| WO2021182088A1 (en) * | 2020-03-10 | 2021-09-16 | 株式会社ミツバ | Permanent magnet synchronous motor |
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