JP2003304670A - Method of manufacturing rotor for rotating machine - Google Patents
Method of manufacturing rotor for rotating machineInfo
- Publication number
- JP2003304670A JP2003304670A JP2002106144A JP2002106144A JP2003304670A JP 2003304670 A JP2003304670 A JP 2003304670A JP 2002106144 A JP2002106144 A JP 2002106144A JP 2002106144 A JP2002106144 A JP 2002106144A JP 2003304670 A JP2003304670 A JP 2003304670A
- Authority
- JP
- Japan
- Prior art keywords
- electromagnetic steel
- magnetic
- rotor
- region
- steel sheet
- 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
Landscapes
- Manufacture Of Motors, Generators (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
(57)【要約】
【課題】 電磁鋼板の形状を維持しつつ所望領域を非磁
性化処理できる、回転機用ロータの製造方法を提供する
ことを目的とする。
【解決手段】 複数の磁石スロット２８を有する電磁鋼
板２４を積層してロータコア２２を形成し、電磁鋼板２
４の非磁性化処理を所望する領域の表面３０に、非磁性
物質を含有する非磁性塗料を塗布し、電磁鋼板２４を加
熱することで非磁性塗料を拡散浸透させて、非磁性化処
理を所望する領域に非磁性領域を形成し、ロータコアに
磁石を埋設する。
(57) [Problem] To provide a method of manufacturing a rotor for a rotating machine, which can demagnetize a desired region while maintaining the shape of an electromagnetic steel sheet. SOLUTION: An electromagnetic steel sheet 24 having a plurality of magnet slots 28 is laminated to form a rotor core 22, and an electromagnetic steel sheet 2 is formed.
A non-magnetic paint containing a non-magnetic substance is applied to the surface 30 of the region where the non-magnetic treatment is desired in No. 4, and the non-magnetic paint is diffused and infiltrated by heating the electromagnetic steel sheet 24 to perform the non-magnetic treatment. A non-magnetic region is formed in a desired region, and a magnet is embedded in the rotor core.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、回転機用ロータの
製造方法に関し、特に電磁鋼板を積層してロータコアを
形成する回転機用ロータの製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a rotor for a rotating machine, and more particularly, to a method for manufacturing a rotor for a rotating machine, which laminates electromagnetic steel sheets to form a rotor core.
【０００２】[0002]
【従来の技術】従来の回転機用ロータの構造を図６に示
す。図６に示す回転機用ロータ１０は、電磁鋼板１２が
積層されたものである。この回転機用ロータ１０が、回
転磁界を形成する図示しないステータの中に挿入され、
供給電力により回転するステータ内の回転磁界と、ロー
タ磁石１４との反発吸引作用によりロータが回転駆動す
る。しかしながら従来のロータ構造では、磁石角部周辺
１５において、ロータ回転トルクに寄与しない、無効な
磁界が形成されてしまう。2. Description of the Related Art The structure of a conventional rotor for a rotating machine is shown in FIG. The rotor 10 for a rotary machine shown in FIG. 6 is a stack of electromagnetic steel plates 12. This rotor 10 for a rotating machine is inserted into a stator (not shown) that forms a rotating magnetic field,
The rotating magnetic field in the stator rotated by the supplied electric power and the repulsive attraction action of the rotor magnet 14 drive the rotor to rotate. However, in the conventional rotor structure, an invalid magnetic field that does not contribute to the rotor rotation torque is formed around the magnet corner portion 15.
【０００３】この様子を示したのが、図７である。回転
機用ロータのロータ磁石１４は、図７に示すとおり、ス
テータ側に流れる有効な磁界１６だけでなく、ロータ側
に流れるロータ回転トルクに寄与しない無効な磁界１８
も形成してしまう。つまり、磁石から発生する磁界が有
効に活用されておらず、とくにロータ外周部と磁石角部
の間の領域であるブリッジ部２０でこの現象が顕著であ
る。FIG. 7 shows this state. As shown in FIG. 7, the rotor magnet 14 of the rotor for a rotating machine includes not only the effective magnetic field 16 flowing to the stator side but also the invalid magnetic field 18 not contributing to the rotor rotation torque flowing to the rotor side.
Will also form. That is, the magnetic field generated from the magnet is not effectively utilized, and this phenomenon is particularly remarkable in the bridge portion 20 which is a region between the rotor outer peripheral portion and the magnet corner portion.
【０００４】この無効な磁界１８を減少させる方法とし
て、ブリッジ部２０を狭めて無効な磁界１８の流れを阻
止する方法が考えられる。しかしこの場合、ブリッジ部
２０が狭くなるため、ロータ回転の際の遠心力による応
力集中により、ブリッジ部２０が破断する危険性を増大
させてしまう。さらにブリッジ部２０が狭くなると、電
磁鋼板１２をプレス加工する際、加工精度を厳しくする
必要がありコスト高につながってしまう。As a method of reducing the invalid magnetic field 18, a method of narrowing the bridge portion 20 to prevent the flow of the invalid magnetic field 18 can be considered. However, in this case, since the bridge portion 20 becomes narrow, stress concentration due to centrifugal force during rotation of the rotor increases the risk of the bridge portion 20 breaking. Further, if the bridge portion 20 becomes narrower, it is necessary to make the processing accuracy severe when the electromagnetic steel plate 12 is pressed, which leads to an increase in cost.
【０００５】また、無効な磁界１８を減少させる別の方
法が、特開平８−３４０６６６号公報に記載されてい
る。この方法は、ブリッジ部２０を非磁性体材料で形成
し、ブリッジ部２０に磁界を発生させないロータ構造を
提供するものである。しかしながら、上記公報記載のロ
ータは焼結材料を利用した押出成形方法により製造され
るものであり、電磁鋼板１２に比べ焼結材料の強度に問
題がある。また電磁鋼板１２の積層構造によるロータに
比べて渦電流による損出も大きい。Another method for reducing the ineffective magnetic field 18 is described in Japanese Patent Laid-Open No. 8-340666. This method provides a rotor structure in which the bridge portion 20 is formed of a non-magnetic material and a magnetic field is not generated in the bridge portion 20. However, the rotor described in the above publication is manufactured by an extrusion molding method using a sintered material, and has a problem in the strength of the sintered material as compared with the magnetic steel sheet 12. Moreover, loss due to eddy current is larger than that of a rotor having a laminated structure of electromagnetic steel sheets 12.
【０００６】[0006]
【発明が解決しようとする課題】そこで本発明は、電磁
鋼板の形状を維持しつつ所望領域を非磁性化処理でき
る、回転機用ロータの製造方法を提供することを目的と
する。SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a method for manufacturing a rotor for a rotating machine, which can demagnetize a desired region while maintaining the shape of an electromagnetic steel sheet.
【０００７】[0007]
【課題を解決するための手段】（１）上記目的を達成す
るために、本発明に係る回転機用ロータの製造方法は、
電磁鋼板を積層してロータコアを形成する工程と、前記
電磁鋼板の所望領域の表面に、非磁性塗料を塗布する工
程と、前記電磁鋼板を加熱して、前記非磁性塗料を前記
所望領域に拡散浸透させ、非磁性領域を形成する工程
と、前記ロータコアに磁石を埋設する工程と、を有する
ものとする。(1) In order to achieve the above object, a method for manufacturing a rotor for a rotating machine according to the present invention comprises:
Forming a rotor core by laminating electromagnetic steel sheets, applying a non-magnetic paint to the surface of the desired area of the electromagnetic steel sheet, and heating the electromagnetic steel sheet to diffuse the non-magnetic paint to the desired area. The method includes the steps of infiltrating and forming a nonmagnetic region, and burying a magnet in the rotor core.
【０００８】上記方法によれば、電磁鋼板の積層構造の
利点である、強度が比較的大きいこと、渦電流の損出が
比較的小さいこと、振動や衝撃に対する弾力性が比較的
よいことを保ちつつ、所望の領域のみを非磁性化処理で
きる。According to the above method, the advantages of the laminated structure of electromagnetic steel sheets are that the strength is relatively large, the loss of eddy current is relatively small, and the elasticity with respect to vibration and impact is relatively good. Meanwhile, only the desired region can be demagnetized.
【０００９】望ましくは、本発明に係る回転機用ロータ
の製造方法は、前記電磁鋼板は、複数の磁石スロットを
有する電磁鋼板であり、前記非磁性塗料を塗布する工程
は、前記電磁鋼板の隣接する磁石スロット間領域の電磁
鋼板外周側面に、非磁性塗料を塗布する工程であるもの
とする。Preferably, in the method for manufacturing a rotor for a rotating machine according to the present invention, the electromagnetic steel sheet is an electromagnetic steel sheet having a plurality of magnet slots, and the step of applying the non-magnetic coating material is adjacent to the electromagnetic steel sheet. It is a step of applying a non-magnetic paint to the outer peripheral side surface of the electromagnetic steel plate in the region between the magnet slots.
【００１０】上記方法によれば、さらに磁石スロット間
領域の強度を従来の積層構造と同じ程度に保ちつつ、プ
レス打ち抜き時の加工精度も現状のままに、磁石スロッ
ト間領域のみを非磁性化処理できる。According to the above method, the strength of the inter-magnet-slot region is maintained at the same level as that of the conventional laminated structure, and the machining precision at the time of punching is not changed. it can.
【００１１】望ましくは、本発明に係る回転機用ロータ
の製造方法は、前記非磁性塗料は、非磁性物質を含有す
る非磁性塗料であり、前記非磁性領域を形成する工程
は、前記非磁性塗料が塗布された前記電磁鋼板を所望の
雰囲気中で加熱して、前記非磁性塗料を前記所望領域に
拡散浸透させ、非磁性領域を形成する工程であるものと
する。Preferably, in the method for manufacturing a rotor for a rotating machine according to the present invention, the non-magnetic coating material is a non-magnetic coating material containing a non-magnetic substance, and the step of forming the non-magnetic region includes the non-magnetic coating material. It is assumed that the electromagnetic steel sheet coated with the coating material is heated in a desired atmosphere to diffuse and permeate the non-magnetic coating material into the desired area to form a non-magnetic area.
【００１２】（２）また、上記目的を達成するために、
本発明に係る回転機用ロータの製造方法は、電磁鋼板を
積層してロータコアを形成する工程と、前記電磁鋼板の
所望領域の表面を溶接することにより、前記所望領域を
歪ませて非磁性領域を形成する工程と、前記ロータコア
に磁石を埋設する工程と、を有するものとする。(2) Further, in order to achieve the above object,
A method for manufacturing a rotor for a rotating machine according to the present invention includes a step of laminating electromagnetic steel plates to form a rotor core, and welding the surface of a desired region of the electromagnetic steel plates to distort the desired region and thereby a non-magnetic region. And a step of burying a magnet in the rotor core.
【００１３】上記方法によれば、電磁鋼板の積層構造の
利点である、強度が比較的大きいこと、渦電流の損出が
比較的小さいこと、振動や衝撃に対する弾力性が比較的
よいことを保ちつつ、所望の領域のみを非磁性化処理で
きる。According to the above method, the advantages of the laminated structure of electromagnetic steel sheets are that the strength is relatively large, the loss of eddy current is relatively small, and the elasticity with respect to vibration and impact is relatively good. Meanwhile, only the desired region can be demagnetized.
【００１４】望ましくは、本発明に係る回転機用ロータ
の製造方法は、前記電磁鋼板は、複数の磁石スロットを
有する電磁鋼板であり、前記非磁性領域を形成する工程
は、前記電磁鋼板の隣接する磁石スロット間領域の電磁
鋼板外周側面を溶接することにより、前記磁石スロット
間領域を歪ませて非磁性領域を形成する工程であるもの
とする。Preferably, in the method for manufacturing a rotor for a rotating machine according to the present invention, the electromagnetic steel sheet is an electromagnetic steel sheet having a plurality of magnet slots, and the step of forming the non-magnetic region is adjacent to the electromagnetic steel sheet. By welding the outer peripheral surface of the electromagnetic steel plate in the region between the magnet slots, the non-magnetic region is formed by distorting the region between the magnet slots.
【００１５】上記方法によれば、さらに磁石スロット間
領域の強度を従来の積層構造と同じ程度に保ちつつ、プ
レス打ち抜き時の加工精度も現状のままに、磁石スロッ
ト間領域のみを非磁性化処理できる。According to the above method, the strength of the magnet inter-slot region is maintained at the same level as that of the conventional laminated structure, and the machining precision at the time of press punching remains unchanged. it can.
【００１６】[0016]
【発明の実施の形態】本発明における回転機用ロータの
製造方法の実施例を図面に基づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for manufacturing a rotor for a rotating machine according to the present invention will be described with reference to the drawings.
【００１７】実施例１．図１は本発明により製造される
回転機用ロータのロータコアを示した図である。図１に
示すように、本発明により製造される回転機用ロータの
ロータコア２２は、円盤状の電磁鋼板２４を複数枚積層
して作られている。各電磁鋼板２４は、高透磁率材料、
例えば軟磁性材料等で構成されており、プレス加工等に
よって中心部に円筒状の軸スロット２６が打ち抜かれ、
さらに四つの直方体状の磁石スロット２８が軸スロット
２６を囲むように等間隔で打ち抜かれている。プレス加
工された電磁鋼板２４は、複数枚密着固定してロータコ
ア２２が形成される。電磁鋼板２４同士の密着固定は、
溶接あるいは接着等、用途に応じて自由に選択可能であ
る。Embodiment 1. FIG. 1 is a view showing a rotor core of a rotor for a rotary machine manufactured according to the present invention. As shown in FIG. 1, a rotor core 22 of a rotor for a rotary machine manufactured according to the present invention is made by laminating a plurality of disc-shaped electromagnetic steel plates 24. Each electromagnetic steel plate 24 is a high magnetic permeability material,
For example, it is made of a soft magnetic material or the like, and the cylindrical shaft slot 26 is punched out at the center by press working,
Further, four rectangular parallelepiped magnet slots 28 are punched at equal intervals so as to surround the shaft slot 26. A plurality of pressed electromagnetic steel plates 24 are closely fixed to each other to form the rotor core 22. Adhesive fixing of the electromagnetic steel plates 24,
It can be freely selected depending on the application, such as welding or adhesion.
【００１８】ロータコア２２が形成された後、図１に示
すとおり、隣り合う磁石スロット２８の角部（ブリッジ
部）間領域の表面３０（主に電磁鋼板外周側面）に非磁
性塗料を塗布する。塗料は、エチルアルコール等の溶剤
に有機物質粘結材でＣｒ、Ａｌ、Ｃｕ等、非磁性物質の
粉末を含有した泥状物質が好ましい。ただし用途に応じ
た非磁性塗料が適宜選択可能である。その後、塗布した
非磁性塗料を乾燥させ、拡散浸透処理を実施する。After the rotor core 22 is formed, as shown in FIG. 1, a nonmagnetic paint is applied to the surface 30 (mainly the outer peripheral surface of the electromagnetic steel plate) in the region between the corners (bridges) of the adjacent magnet slots 28. The paint is preferably a mud-like substance containing a powder of a non-magnetic substance such as Cr, Al or Cu as an organic substance binder in a solvent such as ethyl alcohol. However, a non-magnetic coating material can be appropriately selected according to the application. Then, the applied non-magnetic coating material is dried and a diffusion and penetration treatment is performed.
【００１９】図２は拡散浸透処理の様子を示した概念図
であり、図１におけるブリッジ部間領域の拡大図であ
る。拡散浸透処理としては、雰囲気（例えばＫＣｌ４、
Ｃａｃｌ４、Ａｒ、Ｎ２、Ｈ２等）のもとで、拡散浸透
熱処理温度（例えば５００℃〜１３００℃程度）で加熱
し、拡散浸透加熱時間（例えば１分〜２００時間程度）
の間、加熱を継続する。この拡散浸透処理により、図２
に示すとおり、非磁性塗料がブリッジ部を覆うように拡
散し、非磁性領域３２を形成する。FIG. 2 is a conceptual diagram showing the state of the diffusion and penetration treatment, and is an enlarged view of the region between the bridge portions in FIG. The diffusion and penetration treatment includes an atmosphere (for example, KCl4,
Cac4, Ar, N2, H2, etc.) and heat at a diffusion heat treatment temperature (for example, about 500 ° C. to 1300 ° C.), and a diffusion permeation heating time (for example, about 1 minute to 200 hours).
Heating is continued for a while. By this diffusion and penetration treatment,
As shown in, the non-magnetic coating material diffuses so as to cover the bridge portion and forms the non-magnetic region 32.
【００２０】非磁性領域３２の形成後、図１の磁石スロ
ット２８に、図示しない磁石が挿入、接着され、回転機
用ロータが形成される。なお、磁石の挿入は、磁石が熱
により減磁することを防ぐため、上記拡散浸透処理後が
望ましいが、本実施例はこれに限定されるものではな
い。また磁石スロット２８は直方体に限定されるもので
はなく、例えば円弧状のものでもよく、また磁石スロッ
ト２８の配置や数も回転機の用途に応じて適宜選択すれ
ばよい。After the nonmagnetic region 32 is formed, a magnet (not shown) is inserted and bonded into the magnet slot 28 of FIG. 1 to form a rotor for a rotating machine. It should be noted that the insertion of the magnet is preferably performed after the diffusion and permeation treatment in order to prevent the magnet from being demagnetized by heat, but the present embodiment is not limited to this. Further, the magnet slot 28 is not limited to a rectangular parallelepiped, and may have an arc shape, for example, and the arrangement and number of the magnet slots 28 may be appropriately selected according to the application of the rotating machine.
【００２１】ブリッジ部間領域に非磁性領域３２が形成
された際の磁石による磁界形成の概念図を図３に示す。
図３に示すとおり、長辺の外周側をＮ極、内周側をＳ極
とする磁石３４を埋設した場合、ブリッジ部間領域、つ
まり磁石角部周辺のみ非磁性領域３２が形成されている
ため、磁界は主に磁石長辺の垂直方向にのみ発生し、ブ
リッジ部において回転磁界、つまりロータ回転に無効と
なる磁界が発生しない。したがって、磁石３４の持つ磁
界形成のエネルギーが主に回転トルクに寄与する有効な
磁界にのみ費やされる。FIG. 3 shows a conceptual diagram of magnetic field formation by the magnet when the nonmagnetic region 32 is formed in the inter-bridge region.
As shown in FIG. 3, when the magnet 34 having the N pole on the outer peripheral side of the long side and the S pole on the inner peripheral side is embedded, the non-magnetic region 32 is formed only in the inter-bridge region, that is, only around the corners of the magnet. Therefore, the magnetic field is mainly generated only in the direction perpendicular to the long side of the magnet, and a rotating magnetic field, that is, a magnetic field ineffective for rotor rotation is not generated in the bridge portion. Therefore, the magnetic field forming energy of the magnet 34 is mainly consumed only in the effective magnetic field that contributes to the rotational torque.
【００２２】上述した非磁性化処理は、ロータコア２２
のブリッジ部への非磁性化処理を示したが、この処理は
ブリッジ部に限定されるものではなく、その他、非磁性
化処理が必要な部分に同様な方法により非磁性化処理が
可能であることは容易に理解できる。また、ブリッジ部
に非磁性塗料を塗布、拡散処理して非磁性領域を形成し
てから、電磁鋼板を積層してもよい。The above-described demagnetization processing is performed by the rotor core 22.
The non-magnetization treatment of the bridge portion of the above is shown, but this treatment is not limited to the bridge portion, and other portions that need non-magnetization treatment can be non-magnetized treatment by the same method. It's easy to understand. Alternatively, a nonmagnetic coating may be applied to the bridge portion and a diffusion treatment may be performed to form the nonmagnetic region, and then the electromagnetic steel sheets may be laminated.
【００２３】本実施例の拡散浸透処理における加熱工程
は、歪み取り焼純の効果も期待できる。つまり、通常、
電磁鋼板のプレス時に発生する打ち抜き部分の歪みを取
り除くために、例えば７００℃〜７５０℃程度、３０分
から１時間程度、歪み部分を加熱処理することで歪みが
低減でき、これにより電磁鋼板２４（図１）の磁気特性
が向上することで、鉄損の低減などを図ることができ
る。したがって、本実施例の拡散浸透処理における加熱
工程は、歪み取り焼純の役割を果たすことも期待でき
る。In the heating step in the diffusion and penetration treatment of this embodiment, the effect of strain relief and refining can be expected. That is, normally
In order to remove the distortion of the punched portion that occurs during the pressing of the electromagnetic steel sheet, the distortion can be reduced by, for example, heating the strained portion for about 700 ° C. to 750 ° C. for about 30 minutes to 1 hour. By improving the magnetic property of 1), iron loss can be reduced. Therefore, it can be expected that the heating step in the diffusion and infiltration treatment of this embodiment also plays a role of strain relief.
【００２４】実施例２．図１は本発明により製造される
回転機用ロータのロータコア２２を示した図である。図
１に示すように、本発明により製造される回転機用ロー
タのロータコア２２は、実施例１におけるロータコア同
様、プレス加工された電磁鋼板２４を複数枚、密着固定
して形成される。Example 2. FIG. 1 is a diagram showing a rotor core 22 of a rotor for a rotary machine manufactured according to the present invention. As shown in FIG. 1, the rotor core 22 of the rotor for a rotary machine manufactured according to the present invention is formed by closely fixing a plurality of pressed electromagnetic steel plates 24, similarly to the rotor core in the first embodiment.
【００２５】ロータコア２２が形成された後、図１に示
すとおり、隣り合う磁石スロット２８の角部（ブリッジ
部）間領域の表面３０（主に電磁鋼板外周側面）に溶接
を行う。溶接方法はレーザ溶接等、用途に応じて自由に
選択可能である。溶接部分は、図４に示すように、ブリ
ッジ部の外周側面３６のみでもよく、また図５に示すよ
うに、隣接する磁石スロット間全体の外周側面３８に及
んでもよい。いずれの場合も溶接部分に歪を生じさせる
ことで溶接部分のみの磁気特性を悪化させ非磁性領域３
２を形成する。この際、溶接によりロータ外周部に溶接
部位が膨らまないように処理を施すことは言うまでもな
い。溶接による非磁性領域３２の形成処理の際、電磁鋼
板２４の密着固定の効果も期待でき、前述した電磁鋼板
２４の密着固定処理を削減する、あるいは密着固定処理
の補強を行うことも可能となる。After the rotor core 22 is formed, as shown in FIG. 1, welding is performed on the surface 30 (mainly the outer peripheral surface of the electromagnetic steel plate) in the region between the corners (bridges) of the adjacent magnet slots 28. The welding method, such as laser welding, can be freely selected according to the application. The welded portion may be only the outer peripheral side surface 36 of the bridge portion as shown in FIG. 4, or may be the entire outer peripheral side surface 38 between adjacent magnet slots as shown in FIG. In any case, distortion is caused in the welded portion to deteriorate the magnetic characteristics of only the welded portion and
Form 2. At this time, it goes without saying that processing is performed so that the welded portion does not swell on the outer peripheral portion of the rotor due to welding. In the process of forming the non-magnetic region 32 by welding, the effect of closely fixing the electromagnetic steel plate 24 can be expected, and it is possible to reduce the aforementioned closely fixing process of the electromagnetic steel plate 24 or to reinforce the closely fixing process. .
【００２６】非磁性領域３２の形成後、図１の磁石スロ
ット２８に、図示しない磁石が挿入、接着され、回転機
用ロータが形成される。なお磁石スロット２８は直方体
に限定されるものではなく、例えば円弧状のものでもよ
く、また磁石スロット２８の配置や数も回転機の用途に
応じて適宜選択すればよい。After forming the non-magnetic region 32, a magnet (not shown) is inserted into and bonded to the magnet slot 28 of FIG. 1 to form a rotor for a rotating machine. The magnet slot 28 is not limited to a rectangular parallelepiped, and may have, for example, an arc shape, and the arrangement and number of the magnet slots 28 may be appropriately selected according to the application of the rotating machine.
【００２７】ブリッジ部間領域に非磁性領域３２が形成
された際の磁石による磁界形成の概念図を図３に示す。
図３に示すとおり、長辺の外周側をＮ極、内周側をＳ極
とする磁石３４を埋設した場合、ブリッジ部間領域、つ
まり磁石角部周辺のみ非磁性領域３２が形成されている
ため、磁界は主に磁石長辺の垂直方向にのみ発生し、ブ
リッジ部において回転磁界、つまりロータ回転に無効と
なる磁界が発生しない。したがって、磁石３４の持つ磁
界形成のエネルギーが主に回転トルクに寄与する有効な
磁界にのみ費やされる。FIG. 3 shows a conceptual diagram of magnetic field formation by the magnet when the nonmagnetic region 32 is formed in the inter-bridge region.
As shown in FIG. 3, when the magnet 34 having the N pole on the outer peripheral side of the long side and the S pole on the inner peripheral side is embedded, the non-magnetic region 32 is formed only in the inter-bridge region, that is, only around the corners of the magnet. Therefore, the magnetic field is mainly generated only in the direction perpendicular to the long side of the magnet, and a rotating magnetic field, that is, a magnetic field ineffective for rotor rotation is not generated in the bridge portion. Therefore, the magnetic field forming energy of the magnet 34 is mainly consumed only in the effective magnetic field that contributes to the rotational torque.
【００２８】上述した非磁性化処理は、ロータコア２２
（図１）のブリッジ部への非磁性化処理を示したが、こ
の処理はブリッジ部に限定されるものではなく、その
他、非磁性化処理が必要な部分に同様な方法により非磁
性化処理が可能であることは容易に理解できる。The demagnetization process described above is performed by the rotor core 22.
Although the non-magnetization treatment for the bridge portion is shown in (Fig. 1), this treatment is not limited to the bridge portion, and the non-magnetization treatment is applied to the other portions requiring the non-magnetization treatment by the same method. It is easy to understand that is possible.
【００２９】[0029]
【発明の効果】以上説明したように、本発明に係る回転
機用ロータの製造方法により、電磁鋼板の形状を維持し
つつ所望領域を非磁性化処理できる。As described above, the method for manufacturing a rotor for a rotating machine according to the present invention makes it possible to demagnetize a desired region while maintaining the shape of an electromagnetic steel sheet.
【図１】 本発明により製造される回転機用ロータのロ
ータコアを示す図である。FIG. 1 is a diagram showing a rotor core of a rotor for a rotating machine manufactured according to the present invention.
【図２】 拡散浸透処理の様子を示した概念図である。FIG. 2 is a conceptual diagram showing a state of diffusion and penetration processing.
【図３】 磁石による磁界形成の概念図である。FIG. 3 is a conceptual diagram of magnetic field formation by a magnet.
【図４】 本発明における溶接部を示した図である。FIG. 4 is a diagram showing a welded portion in the present invention.
【図５】 本発明における溶接部を示した図である。FIG. 5 is a diagram showing a welded portion in the present invention.
【図６】 従来の回転機用ロータを示した図である。FIG. 6 is a view showing a conventional rotor for a rotating machine.
【図７】 磁石による磁界形成の概念図である。FIG. 7 is a conceptual diagram of magnetic field formation by a magnet.
２２ ロータコア、２４ 電磁鋼板、２６ 軸スロッ
ト、２８ 磁石スロット、３０ ブリッジ部間領域の表
面、３２ 非磁性領域、３４ 磁石、３６ ブリッジ部
の外周側面、３８ 磁石スロット間全体の外周側面。22 rotor core, 24 electromagnetic steel plate, 26 axial slot, 28 magnet slot, 30 surface between bridge portions, 32 non-magnetic area, 34 magnet, 36 outer peripheral side surface of bridge portion, 38 outer peripheral side surface between entire magnet slots.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 宮本 康司 愛知県豊田市トヨタ町１番地 トヨタ自動 車株式会社内 (72)発明者 高橋 利光 愛知県豊田市トヨタ町１番地 トヨタ自動 車株式会社内 Ｆターム(参考） 5H615 AA01 BB07 BB14 PP02 PP06 RR07 SS16 SS18 SS24 SS33 5H622 AA04 CA02 CA07 CA13 CB03 CB05 PP17 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Koji Miyamoto 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Auto Car Co., Ltd. (72) Inventor Toshimitsu Takahashi 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Auto Car Co., Ltd. F term (reference) 5H615 AA01 BB07 BB14 PP02 PP06 RR07 SS16 SS18 SS24 SS33 5H622 AA04 CA02 CA07 CA13 CB03 CB05 PP17
Claims (5)
る工程と、 前記電磁鋼板の所望領域の表面に、非磁性塗料を塗布す
る工程と、 前記電磁鋼板を加熱して、前記非磁性塗料を前記所望領
域に拡散浸透させ、非磁性領域を形成する工程と、 前記ロータコアに磁石を埋設する工程と、を有する、回
転機用ロータの製造方法。1. A step of laminating electromagnetic steel sheets to form a rotor core, a step of applying a non-magnetic paint on a surface of a desired region of the electromagnetic steel sheet, and a step of heating the electromagnetic steel sheet to remove the non-magnetic paint. A method for manufacturing a rotor for a rotating machine, comprising: a step of diffusing and penetrating into the desired area to form a nonmagnetic area; and a step of burying a magnet in the rotor core.
法であって、 前記電磁鋼板は、複数の磁石スロットを有する電磁鋼板
であり、 前記非磁性塗料を塗布する工程は、前記電磁鋼板の隣接
する磁石スロット間領域の電磁鋼板外周側面に、非磁性
塗料を塗布する工程である、回転機用ロータの製造方
法。2. The method for manufacturing a rotor for a rotating machine according to claim 1, wherein the electromagnetic steel sheet is an electromagnetic steel sheet having a plurality of magnet slots, and the step of applying the non-magnetic paint is performed on the electromagnetic steel sheet. A method for manufacturing a rotor for a rotating machine, which is a step of applying a non-magnetic paint to the outer peripheral side surface of the electromagnetic steel plate in the region between the adjacent magnet slots.
の製造方法であって、 前記非磁性塗料は、非磁性物質を含有する非磁性塗料で
あり、 前記非磁性領域を形成する工程は、前記非磁性塗料が塗
布された前記電磁鋼板を所望の雰囲気中で加熱して、前
記非磁性塗料を前記所望領域に拡散浸透させ、非磁性領
域を形成する工程である、回転機用ロータの製造方法。3. The method for manufacturing a rotor for a rotating machine according to claim 1, wherein the non-magnetic coating material is a non-magnetic coating material containing a non-magnetic substance, and the step of forming the non-magnetic region is performed. A step of heating the electromagnetic steel sheet coated with the non-magnetic coating material in a desired atmosphere to diffuse and permeate the non-magnetic coating material into the desired area to form a non-magnetic area, Production method.
る工程と、 前記電磁鋼板の所望領域の表面を溶接することにより、
前記所望領域を歪ませて非磁性領域を形成する工程と、 前記ロータコアに磁石を埋設する工程と、を有する、回
転機用ロータの製造方法。4. A step of laminating electromagnetic steel sheets to form a rotor core, and welding a surface of a desired region of the electromagnetic steel sheets,
A method for manufacturing a rotor for a rotating machine, comprising: a step of distorting the desired area to form a non-magnetic area; and a step of burying a magnet in the rotor core.
法であって、 前記電磁鋼板は、複数の磁石スロットを有する電磁鋼板
であり、 前記非磁性領域を形成する工程は、前記電磁鋼板の隣接
する磁石スロット間領域の電磁鋼板外周側面を溶接する
ことにより、前記磁石スロット間領域を歪ませて非磁性
領域を形成する工程である、回転機用ロータの製造方
法。5. The method for manufacturing a rotor for a rotating machine according to claim 4, wherein the electromagnetic steel sheet is an electromagnetic steel sheet having a plurality of magnet slots, and the step of forming the non-magnetic region is the electromagnetic steel sheet. The method for manufacturing a rotor for a rotating machine, which comprises the step of distorting the region between magnet slots to form a non-magnetic region by welding the outer peripheral side surface of the electromagnetic steel plate in the region between adjacent magnet slots.
Priority Applications (1)
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|---|---|---|---|
| JP2002106144A JP2003304670A (en) | 2002-04-09 | 2002-04-09 | Method of manufacturing rotor for rotating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002106144A JP2003304670A (en) | 2002-04-09 | 2002-04-09 | Method of manufacturing rotor for rotating machine |
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|---|---|
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|---|---|---|---|
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