JPH06140248A - Magnetizing method for permanent magnet rotor - Google Patents
Magnetizing method for permanent magnet rotorInfo
- Publication number
- JPH06140248A JPH06140248A JP4287898A JP28789892A JPH06140248A JP H06140248 A JPH06140248 A JP H06140248A JP 4287898 A JP4287898 A JP 4287898A JP 28789892 A JP28789892 A JP 28789892A JP H06140248 A JPH06140248 A JP H06140248A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- magnetizing
- yoke
- rotor
- magnetic field
- 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
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- Powder Metallurgy (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、界磁用永久磁石を有す
るモータの回転子に係り、高温の雰囲気中や液体中にて
着磁するようにした永久磁石回転子の着磁方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor of a motor having a permanent magnet for field magnetization, and to a method of magnetizing a permanent magnet rotor adapted to be magnetized in a high temperature atmosphere or in a liquid.
【０００２】[0002]
【従来の技術】一般に、従来の永久磁石回転子の着磁方
法は、未着磁の界磁用永久磁石を有するモータの回転子
を、室温状態で着磁ヨーク内あるいは電動機の電機子内
にて磁化電源装置を用いて着磁を行っている。2. Description of the Related Art Generally, a conventional magnetizing method for a permanent magnet rotor is to install a rotor of a motor having an unmagnetized field permanent magnet in a magnetizing yoke or an armature of an electric motor at room temperature. Magnetization is performed using a magnetizing power supply device.
【０００３】あるいは、未着磁の界磁用永久磁石単体
を、室温状態で着磁コイル内にて磁化電源装置を用いて
着磁を行い。それを回転子ヨークに備え付けることによ
り、界磁用永久磁石回転子を得ている。Alternatively, an unmagnetized field permanent magnet alone is magnetized at room temperature in a magnetizing coil using a magnetizing power supply device. By attaching it to the rotor yoke, the permanent magnet rotor for field magnet is obtained.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、室温
で、永久磁石回転子を着磁するためには、着磁ヨーク内
に大きな磁場を発生させる必要があり、それには着磁ヨ
ークの巻線に大電流を流す必要がある。However, in order to magnetize the permanent magnet rotor at room temperature, it is necessary to generate a large magnetic field in the magnetizing yoke, which is large in the winding of the magnetizing yoke. It is necessary to pass an electric current.
【０００５】そのため、永久磁石を着磁するために使用
する磁化電源装置の大容量化および着磁コイル等着磁設
備の大規模化が不可欠となる。そして、これらの大規模
かつ大容量の磁化電源装置は、通常使用される磁化電源
装置に比較し、取扱上非常に危険なものである。Therefore, it is indispensable to increase the capacity of the magnetizing power supply device used for magnetizing the permanent magnet and increase the size of the magnetizing equipment such as the magnetizing coil. Further, these large-scale and large-capacity magnetizing power supply devices are extremely dangerous in handling, as compared with the normally used magnetizing power supply devices.
【０００６】また、着磁ヨークに大電流を流すことは、
着磁ヨークの巻線の銅損の増加を招くことになり、着磁
ヨークの発熱を増加させることになり、磁化電源装置お
よび着磁ヨークの劣化を促進することになる。In addition, the flow of a large current through the magnetizing yoke is
This causes an increase in copper loss of the winding of the magnetizing yoke, increases heat generation of the magnetizing yoke, and accelerates deterioration of the magnetizing power supply device and the magnetizing yoke.
【０００７】さらに、実際、高磁場を発生させることは
渦電流の影響、着磁ヨーク鉄芯の飽和の影響により、非
常に不安定かつ困難なものである。Furthermore, in fact, it is very unstable and difficult to generate a high magnetic field due to the effects of eddy currents and the saturation of the magnetizing yoke iron core.
【０００８】そこで本発明の目的は、かかる従来の技術
の欠点をなくし、容易かつ安定した永久磁石回転子の着
磁方法を提供するものである。Therefore, an object of the present invention is to eliminate the drawbacks of the prior art and provide an easy and stable method for magnetizing a permanent magnet rotor.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成する為
に、本発明による永久磁石回転子の着磁方法は、未着磁
の界磁用永久磁石を有するモータの回転子において、前
記回転子を高温の雰囲気中や液中における界磁用永久磁
石の飽和着磁磁場の減少を利用し、着磁を行なう事を特
徴とする。In order to achieve the above object, a method of magnetizing a permanent magnet rotor according to the present invention is a rotor of a motor having an unmagnetized field permanent magnet. Is characterized in that the magnetization is performed by utilizing the decrease of the saturation magnetizing magnetic field of the permanent magnet for field magnetism in a high temperature atmosphere or in a liquid.
【００１０】[0010]
【実施例】以下本発明の実施例について図面に基づき説
明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１１】本発明の着磁方法の実施例について説明を
容易にするため、まず最初に図２に基ずき説明する。永
久磁石回転子は柱状のヨ−クａと、回転軸ｂ、板状の界
磁用永久磁石ｃを有している。前記ヨークａは多数の鋼
板を一体に積層して形成されている。ヨークａは外周上
に放射方向に突き出した４つの磁極を有し、これら磁極
には界磁用永久磁石を貫通させるスロットｄが設けられ
ている。さらにヨークａの中心部には回転軸ｂを貫通さ
せる回転軸貫通孔ｅが設けられている。回転軸ｂは前記
ヨーク内の回転軸貫通孔に、そして永久磁石ｃは前記ヨ
ーク内のスロットｄに挿入される。In order to facilitate the explanation of the embodiment of the magnetizing method of the present invention, first, explanation will be given based on FIG. The permanent magnet rotor has a columnar yoke a, a rotary shaft b, and a plate-shaped permanent magnet c for field. The yoke a is formed by laminating many steel plates integrally. The yoke a has four magnetic poles protruding in the radial direction on the outer circumference, and these magnetic poles are provided with slots d through which the field permanent magnets penetrate. Further, a rotary shaft through hole e is formed in the center of the yoke a to allow the rotary shaft b to penetrate therethrough. The rotary shaft b is inserted into the rotary shaft through hole in the yoke, and the permanent magnet c is inserted into the slot d in the yoke.
【００１２】次に、本発明の実施例における永久磁石回
転子の製造工程ついて、図１に基ずき説明する。前記ヨ
ークａをオーブンで加熱し、前記ヨークａ及び永久磁石
ｃを所定の温度にまで上昇させる。温度上昇後の前記ヨ
ークａの中心部に設けられた回転軸貫通孔ｅは温度上昇
にしたがい膨張する。膨張後の回転軸貫通孔ｅに回転軸
ｃを挿入する。それと同時に、前記ヨークの磁極片に設
けられたスロットｄに未着磁の永久磁石ｃを挿入する。
最適な設定温度まで冷却し、前記永久磁石の飽和着磁磁
場の減少する温度領域にて磁化電源装置、着磁ヨークを
用いて着磁を行なう。Next, the manufacturing process of the permanent magnet rotor in the embodiment of the present invention will be described with reference to FIG. The yoke a and the permanent magnet c are heated to a predetermined temperature by heating the yoke a in an oven. After the temperature rises, the rotary shaft through hole e provided at the center of the yoke a expands as the temperature rises. The rotating shaft c is inserted into the expanded rotating shaft through hole e. At the same time, the unmagnetized permanent magnet c is inserted into the slot d provided in the pole piece of the yoke.
After cooling to an optimum set temperature, magnetization is performed using a magnetizing power supply device and a magnetizing yoke in a temperature region where the saturated magnetizing magnetic field of the permanent magnet decreases.
【００１３】この着磁設定温度の具体例として、希土類
永久磁石の一種であるＰｒ−Ｆｅ−Ｂ磁石の着磁磁場の
温度依存性について、図３に基づき説明をする。図のよ
うに１００℃での着磁磁場は、２５℃における着磁磁場
に比較して、低い値を持つ。この温度領域で着磁を行な
うことにより、安定な低磁場での飽和着磁をすることが
可能である。なお、この具体例においては、希土類永久
磁石をＰｒ−Ｆｅ−Ｂ磁石としたが、Ｎｄ−Ｆｅ−Ｂ磁
石、Ｓｍ−Ｃｏ磁石の場合にも、同様の着磁磁場の温度
依存性があり、それに基づく最適温度にて着磁が可能で
ある。As a specific example of the magnetizing set temperature, the temperature dependence of the magnetizing magnetic field of a Pr-Fe-B magnet, which is a kind of rare earth permanent magnet, will be described with reference to FIG. As shown in the figure, the magnetizing magnetic field at 100 ° C. has a lower value than the magnetizing magnetic field at 25 ° C. By performing the magnetization in this temperature range, it is possible to perform stable saturation magnetization in a low magnetic field. In this specific example, the rare-earth permanent magnet is the Pr-Fe-B magnet, but the Nd-Fe-B magnet and the Sm-Co magnet have similar temperature dependence of the magnetizing magnetic field. Magnetization is possible at the optimum temperature based on it.
【００１４】以上より、焼キバメ時の温度上昇を利用
し、その温度領域で着磁することにより、希土類永久磁
石回転子を常温時より低い磁場で飽和着磁することが可
能である。From the above, it is possible to saturately magnetize the rare earth permanent magnet rotor at a magnetic field lower than that at room temperature by utilizing the temperature rise during shrinkage and magnetizing in that temperature range.
【００１５】また、前記ヨークをオーブンで加熱させて
説明したが高温の液中、あるいは回転軸に回転子を固定
するのにモールド材およびダイキャストにてヨークを加
熱させてもよい。Although the above description has been made by heating the yoke in an oven, the yoke may be heated in a high temperature liquid or by a mold material and die casting to fix the rotor to the rotary shaft.
【００１６】[0016]
【発明の効果】以上のように本実施例によれば、回転子
を高温の雰囲気中や液中における界磁用永久磁石の飽和
着磁磁場の減少を利用し、着磁を行なうことにより、永
久磁石回転子を安定な低磁場で飽和着磁をすることが可
能である。また、これに伴い、磁化電源装置装置の小容
量化、磁化電源装置および着磁ヨークの劣化の低減、磁
場強度の安定化を実現することが可能である。As described above, according to the present embodiment, the rotor is magnetized by utilizing the reduction of the saturation magnetizing magnetic field of the field permanent magnet in a high temperature atmosphere or in a liquid, It is possible to saturate magnetize the permanent magnet rotor in a stable low magnetic field. Further, along with this, it is possible to reduce the capacity of the magnetizing power supply device, reduce deterioration of the magnetizing power supply device and the magnetizing yoke, and stabilize the magnetic field strength.
【図１】 本発明の永久磁石回転子の製造工程図。FIG. 1 is a manufacturing process diagram of a permanent magnet rotor of the present invention.
【図２】 本発明の永久磁石回転子の斜視図。FIG. 2 is a perspective view of a permanent magnet rotor of the present invention.
【図３】 Ｐｒ−Ｆｅ−Ｂ磁石の着磁磁場の温度依存性
を表す図。FIG. 3 is a diagram showing temperature dependence of a magnetizing magnetic field of a Pr—Fe—B magnet.
ａ 回転子ヨーク ｂ 回転軸 ｃ 永久磁石 ｄ スロット ｅ 回転軸挿入孔 a rotor yoke b rotary shaft c permanent magnet d slot e rotary shaft insertion hole
Claims (3)
の回転子において、前記回転子を高温の雰囲気中や液中
における界磁用永久磁石の飽和着磁磁場の減少を利用
し、着磁を行なう事を特徴とする永久磁石回転子の着磁
方法。1. In a rotor of a motor having an unmagnetized field permanent magnet, the rotor is utilized in a high temperature atmosphere or in a liquid by utilizing a decrease in a saturated magnetic field of the field permanent magnet, A method of magnetizing a permanent magnet rotor, which is characterized by magnetizing.
の回転子において、前記回転子を回転軸に焼きばめ固定
する際の温度上昇時または、焼キバメ固定後の温度下降
時、永久磁石の飽和着磁磁場の減少を利用し、着磁を行
なうことを特徴とする永久磁石回転子の着磁方法。2. In a rotor of a motor having a non-magnetized field permanent magnet, when the temperature rises when the rotor is shrink-fitted and fixed to a rotary shaft, or when the temperature drops after the shrinkage-fixing is fixed, A method for magnetizing a permanent magnet rotor, which is characterized in that the saturation magnetizing magnetic field of the permanent magnet is utilized to perform the magnetization.
の回転子において、前記回転子を回転軸にモールド材お
よびダイキャストにて固定する際の温度上昇または固定
後の温度下降時、永久磁石の飽和着磁磁場の減少を利用
し、着磁を行なうことを特徴とする永久磁石回転子の着
磁方法。3. A rotor of a motor having a non-magnetized permanent magnet for field magnetism, when a temperature rises when fixing the rotor to a rotary shaft with a molding material and die casting, or a temperature decrease after the fixing, A method for magnetizing a permanent magnet rotor, which is characterized in that the saturation magnetizing magnetic field of the permanent magnet is utilized to perform the magnetization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4287898A JPH06140248A (en) | 1992-10-26 | 1992-10-26 | Magnetizing method for permanent magnet rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4287898A JPH06140248A (en) | 1992-10-26 | 1992-10-26 | Magnetizing method for permanent magnet rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06140248A true JPH06140248A (en) | 1994-05-20 |
Family
ID=17723146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4287898A Pending JPH06140248A (en) | 1992-10-26 | 1992-10-26 | Magnetizing method for permanent magnet rotor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06140248A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7821365B2 (en) | 2005-03-17 | 2010-10-26 | Fdk Corporation | Permanent magnet magnetizing apparatus and permanent magnet magnetizing method |
| DE102013100989A1 (en) | 2012-01-31 | 2013-08-01 | Minebea Co., Ltd. | Manufacturing method of a bonded magnet |
| JP2014045044A (en) * | 2012-08-24 | 2014-03-13 | Minebea Co Ltd | Rare earth-iron bonded magnet, and method for manufacturing rotor and electromagnetic device using the same |
| CN106992055A (en) * | 2017-04-19 | 2017-07-28 | 远景能源（江苏）有限公司 | The stator and pole combination structure of permanent magnet direct-drive generator are used for the method magnetized |
| CN110870166A (en) * | 2017-06-15 | 2020-03-06 | 远景能源有限公司 | System suitable for operating a generator |
-
1992
- 1992-10-26 JP JP4287898A patent/JPH06140248A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7821365B2 (en) | 2005-03-17 | 2010-10-26 | Fdk Corporation | Permanent magnet magnetizing apparatus and permanent magnet magnetizing method |
| DE102013100989A1 (en) | 2012-01-31 | 2013-08-01 | Minebea Co., Ltd. | Manufacturing method of a bonded magnet |
| JP2014045044A (en) * | 2012-08-24 | 2014-03-13 | Minebea Co Ltd | Rare earth-iron bonded magnet, and method for manufacturing rotor and electromagnetic device using the same |
| CN106992055A (en) * | 2017-04-19 | 2017-07-28 | 远景能源（江苏）有限公司 | The stator and pole combination structure of permanent magnet direct-drive generator are used for the method magnetized |
| CN110870166A (en) * | 2017-06-15 | 2020-03-06 | 远景能源有限公司 | System suitable for operating a generator |
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