JPH0426339A - Permanent magnet rotor - Google Patents
Permanent magnet rotorInfo
- Publication number
- JPH0426339A JPH0426339A JP2128752A JP12875290A JPH0426339A JP H0426339 A JPH0426339 A JP H0426339A JP 2128752 A JP2128752 A JP 2128752A JP 12875290 A JP12875290 A JP 12875290A JP H0426339 A JPH0426339 A JP H0426339A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- rotor
- permanent magnet
- magnetic pole
- rotor 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
- 230000004907 flux Effects 0.000 claims abstract description 21
- 239000000696 magnetic material Substances 0.000 claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910000976 Electrical steel Inorganic materials 0.000 claims abstract description 7
- 230000035699 permeability Effects 0.000 abstract description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 229910052759 nickel Inorganic materials 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 229910052796 boron Inorganic materials 0.000 description 4
- 238000010030 laminating Methods 0.000 description 4
- WCCJDBZJUYKDBF-UHFFFAOYSA-N copper silicon Chemical compound [Si].[Cu] WCCJDBZJUYKDBF-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 229910052772 Samarium Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- ZDVYABSQRRRIOJ-UHFFFAOYSA-N boron;iron Chemical compound [Fe]#B ZDVYABSQRRRIOJ-UHFFFAOYSA-N 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Brushless Motors (AREA)
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野コ 本発明は、無刷子電動機の永久磁石回転子に関する。[Detailed description of the invention] [Industrial application fields] The present invention relates to a permanent magnet rotor for a brushless electric motor.
［従来の技術］
従来の永久磁石回転子を第３図に示す。第３図に示すよ
うに、回転子鉄心２１と磁極片２３の材質は同一のもの
で、特に硅素鋼板を複数枚積層して形成されるものにつ
いては無方向性の硅素銅帯を使用し回転子鉄心と磁極片
は分離せず一体構造となっていた。また永久磁石２２は
同−ｉ（Ｓ極）同志が対向するように着磁されていて、
永久磁石回転子の外周面では磁極片２３の部分でＮ極、
回転子鉄心２１の部分では同一極同志の反発力によりＳ
極を発生させていた。[Prior Art] A conventional permanent magnet rotor is shown in FIG. As shown in Fig. 3, the materials of the rotor core 21 and the magnetic pole pieces 23 are the same, and in particular, for those formed by laminating multiple silicon steel plates, non-directional silicon copper strips are used to rotate the rotor core 21 and the magnetic pole pieces 23. The child core and magnetic pole piece were not separated but had an integrated structure. Further, the permanent magnet 22 is magnetized so that the -i (S pole) comrades face each other,
On the outer peripheral surface of the permanent magnet rotor, there is a north pole at the magnetic pole piece 23,
In the rotor core 21, due to the repulsive force between the same poles, S
It was generating a pole.
［発明が解決しようとする課題］
しかしなから、従来の回転子鉄心と磁極片に同一の材質
のものを用いる永久磁石回転子の構造にあっては、Ｎ極
に比べて反発力により発生させたＳ極の方が磁束密度が
小さく磁気バランスがとれていなかった。そのため、電
動機の効率に影響を及ぼすという課題を有していた。ま
た、電動機の発電特性にもバラツキがありセンサレス技
術を導入しにくいという課題も有していた。[Problem to be solved by the invention] However, in the structure of a conventional permanent magnet rotor in which the rotor core and magnetic pole pieces are made of the same material, the repulsive force generated by the N pole is The magnetic flux density was lower at the south pole, and the magnetic balance was not maintained. Therefore, there was a problem in that it affected the efficiency of the electric motor. Another problem was that the power generation characteristics of the motors varied, making it difficult to introduce sensorless technology.
本発明の目的は、かかる従来技術の欠点をなくし、電動
機の効率を上げるため磁気バランスをよくすることがで
き、電動機の発電特性も向上させることができる永久磁
石回転子を提供するものである。An object of the present invention is to provide a permanent magnet rotor that can eliminate the drawbacks of the prior art, improve magnetic balance to increase the efficiency of the motor, and improve the power generation characteristics of the motor.
［課題を解決するための手段］
本発明による永久磁石回転子は、塊状の軟磁性体材料か
ら形成される回転子鉄心、または硅素鋼板を複数枚積層
して形成される回転子鉄心と、前記回転子鉄心に装着さ
れる永久磁石および磁極片とから構成される永久磁石回
転子において、前記回転子鉄心と前記磁極片に流れる磁
束の流れ易さを異ならせることを特徴とする。[Means for Solving the Problems] A permanent magnet rotor according to the present invention includes a rotor core formed from a lump-like soft magnetic material or a rotor core formed by laminating a plurality of silicon steel plates, A permanent magnet rotor comprising permanent magnets and magnetic pole pieces attached to a rotor core is characterized in that the ease with which magnetic flux flows through the rotor core and the magnetic pole pieces is made different.
［実施例］
以下に本発明の実施例を図面にもとづき説明する。第１
図は本発明の第１の実施例における永久磁石回転子を表
す斜視図である。１は塊状の軟磁性材料からなる回転子
鉄心、２は永久磁石である希土類−鉄−ホウ素系磁石、
３は塊状の軟磁性材料からなる磁極片である。回転子鉄
心１、永久磁石２、磁極片３は非磁性の固定ネジ４によ
って互いに固着されている。回転子鉄心１は比透磁率の
高い磁性材料で軟鉄または高硅素鋼よりなる。磁極片３
は比透磁率の低い磁性材料で構成されニッケル等からな
る。よって、永久磁石の同一極（Ｓ極）同志の反発力に
よって回転子鉄心に発生させている磁極は、磁路が長い
が磁性体の比透磁率が高いため磁束が流れ易く磁束密度
を大きくすることができる。また磁極片に生ずる磁極（
Ｎ極）は磁路は短いが比透磁率が低いため磁束密度を小
さくすることができる。したがって、回転子鉄心と磁極
片の磁気バランスをつり合わせることができる。[Examples] Examples of the present invention will be described below based on the drawings. 1st
The figure is a perspective view showing a permanent magnet rotor in a first embodiment of the present invention. 1 is a rotor core made of a lumpy soft magnetic material, 2 is a rare earth-iron-boron magnet that is a permanent magnet,
3 is a magnetic pole piece made of a block of soft magnetic material. The rotor core 1, permanent magnets 2, and magnetic pole pieces 3 are fixed to each other by nonmagnetic fixing screws 4. The rotor core 1 is made of a magnetic material with high relative magnetic permeability, such as soft iron or high silicon steel. magnetic pole piece 3
is made of a magnetic material with low relative magnetic permeability, such as nickel. Therefore, the magnetic poles generated in the rotor core by the repulsive force between the same poles (S poles) of the permanent magnets have a long magnetic path, but because the relative magnetic permeability of the magnetic material is high, the magnetic flux flows easily and increases the magnetic flux density. be able to. Also, the magnetic pole generated in the magnetic pole piece (
Although the magnetic path (N pole) is short, the relative magnetic permeability is low, so the magnetic flux density can be reduced. Therefore, the magnetic balance between the rotor core and the magnetic pole pieces can be balanced.
本発明の第２の実施例における永久磁石回転子を表す斜
視図を第２図に示す。１１は硅素鋼板を複数枚積層して
形成される回転子鉄心、１２は永久磁石である希土類−
鉄−ホウ素系磁石であり、永久磁石１２は、硅素銅板を
積層した後の回転子鉄心１１の穴へ軸方向に挿入される
。硅素銅板は方向性硅素鋼帯であり、これは冷間圧延に
よりその長さ方向に比透磁率が最も高くそれに対して約
５５″の付近で比透磁率が小さくなる。本実施例におけ
る回転子鉄心１１は圧延方向を一定にし、永久磁石を入
れる穴の長手方向に一致するように積層されている。よ
って、対向する永久磁゛石１２と平行に磁束が流れ易く
、また同一極の反発力によって発生させている磁束がこ
の方向にほぼ一致している。したがってこの磁極は磁束
密度が大きくなる。逆に実施例１の磁極片に相当する部
分の磁極は、磁束の流れる方向と回転子鉄心の磁束の流
れ易い方向とが異なるので磁束密度が小さくなる。これ
により、磁気バランスをつり合わせることが可能となる
。A perspective view showing a permanent magnet rotor in a second embodiment of the present invention is shown in FIG. 11 is a rotor core formed by laminating a plurality of silicon steel plates, and 12 is a rare earth magnet that is a permanent magnet.
The permanent magnet 12, which is an iron-boron based magnet, is inserted in the axial direction into a hole in the rotor core 11 after laminating silicon-copper plates. The silicon copper plate is a grain-oriented silicon steel strip, which has the highest relative magnetic permeability in its length direction due to cold rolling, whereas the relative magnetic permeability decreases around about 55''. The iron core 11 has a constant rolling direction and is laminated so as to match the longitudinal direction of the hole in which the permanent magnet is inserted.Therefore, the magnetic flux tends to flow parallel to the opposing permanent magnet 12, and the repulsive force of the same pole The magnetic flux generated by the magnetic flux almost coincides with this direction.Therefore, this magnetic pole has a large magnetic flux density.On the contrary, the magnetic pole of the part corresponding to the magnetic pole piece of Example 1 is aligned with the direction of the magnetic flux and the rotor core. Since the direction in which the magnetic flux tends to flow is different from the direction in which the magnetic flux easily flows, the magnetic flux density becomes smaller.This makes it possible to balance the magnetic balance.
なお永久磁石として、本実施例では希土類−鉄一ホウ素
系磁石を用いたが、永久磁石材料としては希土類−鉄−
ホウ素系磁石に限定されるものではなく、Ｓｍ−Ｃｏ（
サマリウム・コバルト）磁石、フェライト磁石等さまざ
まな磁石を用いても同様に実施できることは言うまでも
ない。In this example, a rare earth-iron-boron magnet was used as the permanent magnet, but the permanent magnet material was a rare-earth-iron-boron magnet.
It is not limited to boron-based magnets, and Sm-Co (
It goes without saying that the same process can be carried out using various magnets such as samarium/cobalt (samarium/cobalt) magnets and ferrite magnets.
［発明の効果コ
以上述べたように本発明によれば、回転子鉄心と磁極片
に流れる磁束の流れ易さを異ならせることができるので
、永久磁石回転子の表面磁束密度のバランスをつり合わ
せることが可能となり、電動機の効率を上げられ発電特
性も向上させることができる。[Effects of the Invention] As described above, according to the present invention, the ease with which the magnetic flux flows between the rotor core and the magnetic pole pieces can be made different, so that the surface magnetic flux density of the permanent magnet rotor can be balanced. This makes it possible to increase the efficiency of the motor and improve the power generation characteristics.
第１図は本発明の第１の実施例における永久磁石回転子
を表す斜視図。
第２図は本発明の第２の実施例における永久磁石回転子
を表す斜視図。
第３図は従来の永久磁石回転子を表す斜視図。
１．１１．２１・・・・・・回転子鉄心２．１２．２２
・・・・・・永久磁石
３．
２３・・・・・・・・・・・・・・・磁極片４．
２４・・・・・・・・・・・・・・・固定ネジ以上FIG. 1 is a perspective view showing a permanent magnet rotor in a first embodiment of the present invention. FIG. 2 is a perspective view showing a permanent magnet rotor in a second embodiment of the present invention. FIG. 3 is a perspective view showing a conventional permanent magnet rotor. 1.11.21... Rotor core 2.12.22
...Permanent magnet 3. 23・・・・・・・・・・・・Magnetic pole piece4. 24・・・・・・・・・・・・Fixing screw or more
Claims (1)
硅素鋼板を複数枚積層して形成される回転子鉄心と、前
記回転子鉄心に装着される永久磁石および磁極片とから
構成される永久磁石回転子において、前記回転子鉄心と
前記磁極片に流れる磁束の流れ易さを異ならせることを
特徴とする永久磁石回転子。A permanent rotor core made of a lumpy soft magnetic material or a rotor core made of a plurality of laminated silicon steel plates, and a permanent magnet and a magnetic pole piece attached to the rotor core. A permanent magnet rotor, characterized in that the ease with which magnetic flux flows through the rotor iron core and the magnetic pole pieces is made different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2128752A JPH0426339A (en) | 1990-05-18 | 1990-05-18 | Permanent magnet rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2128752A JPH0426339A (en) | 1990-05-18 | 1990-05-18 | Permanent magnet rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0426339A true JPH0426339A (en) | 1992-01-29 |
Family
ID=14992590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2128752A Pending JPH0426339A (en) | 1990-05-18 | 1990-05-18 | Permanent magnet rotor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0426339A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010226915A (en) * | 2009-03-25 | 2010-10-07 | Toshiba Corp | Permanent magnet motor, motor control system, and washing machine |
| US8664821B2 (en) | 2009-05-27 | 2014-03-04 | Abb Technology Ag | Arrangement for attaching a magnet to a rotor, and a rotor |
| CN105915004A (en) * | 2016-06-06 | 2016-08-31 | 尚勤贵 | Rotor of motor |
| KR20160146822A (en) | 2014-06-12 | 2016-12-21 | 도판 인사츠 가부시키가이샤 | Method for imparting heat sealability to biaxially oriented polyester film, and method for producing packaging container |
-
1990
- 1990-05-18 JP JP2128752A patent/JPH0426339A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010226915A (en) * | 2009-03-25 | 2010-10-07 | Toshiba Corp | Permanent magnet motor, motor control system, and washing machine |
| US8664821B2 (en) | 2009-05-27 | 2014-03-04 | Abb Technology Ag | Arrangement for attaching a magnet to a rotor, and a rotor |
| KR20160146822A (en) | 2014-06-12 | 2016-12-21 | 도판 인사츠 가부시키가이샤 | Method for imparting heat sealability to biaxially oriented polyester film, and method for producing packaging container |
| CN105915004A (en) * | 2016-06-06 | 2016-08-31 | 尚勤贵 | Rotor of motor |
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