JPH0992561A - Helical core for rotating machine and manufacture thereof - Google Patents
Helical core for rotating machine and manufacture thereofInfo
- Publication number
- JPH0992561A JPH0992561A JP24408495A JP24408495A JPH0992561A JP H0992561 A JPH0992561 A JP H0992561A JP 24408495 A JP24408495 A JP 24408495A JP 24408495 A JP24408495 A JP 24408495A JP H0992561 A JPH0992561 A JP H0992561A
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- Japan
- Prior art keywords
- core
- spiral
- steel sheet
- electromagnetic steel
- spiral 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.)
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Links
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- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、回転機器用螺旋
コア、およびその製造方法に関する。螺旋コアは、電動
機、発電機、センサなどの回転子コアまたは固定子コア
として用いられる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spiral core for rotating equipment and a method for manufacturing the same. The spiral core is used as a rotor core or a stator core of electric motors, generators, sensors and the like.
【０００２】[0002]
【従来の技術】螺旋コアは、従来、自動車の交流発電機
等の回転機で使用されており、コア素材にＳＰＣＣなど
の無方向性電磁鋼板が使用されている。電磁鋼板を螺旋
状に形成するには、板幅方向の延長線上、またはそれに
近い点を曲率中心として、帯状の電磁鋼板を螺旋状に塑
性変形する。このようにして螺旋加工した電磁鋼板は、
螺旋の内径側は周方向に圧縮されて板厚が厚くなり、逆
に外径側は周方向に伸びて薄くなる。このため、螺旋加
工した電磁鋼板を積層すると、螺旋コアの内径側が外径
側より厚くなって厚さに不同を生じ、占積率が低下して
いた。したがって、打抜き鋼板を積層したコアよりも総
界磁磁束が減少し、回転機容量が小さかった。また、騒
音や振動も生じやすかった。2. Description of the Related Art Conventionally, a spiral core has been used in a rotating machine such as an automobile AC generator, and a non-oriented electrical steel sheet such as SPCC is used as a core material. In order to form the electromagnetic steel sheet in a spiral shape, the strip-shaped electromagnetic steel sheet is plastically deformed into a spiral shape with a point on the extension line in the plate width direction or a point close thereto as the center of curvature. The electromagnetic steel sheet spirally processed in this way is
The inner diameter side of the spiral is compressed in the circumferential direction to increase the plate thickness, and conversely, the outer diameter side extends in the circumferential direction to become thinner. For this reason, when the spirally processed electromagnetic steel sheets are laminated, the inner diameter side of the spiral core becomes thicker than the outer diameter side, and the thickness is not uniform, and the space factor is reduced. Therefore, the total field magnetic flux was reduced and the rotating machine capacity was smaller than that of the core formed by stacking punched steel sheets. Also, noise and vibration were likely to occur.
【０００３】最近、螺旋加工しても板厚が変化しない螺
旋コアが方向性電磁鋼板により可能になった。しかし、
この螺旋コアは、コアバック部の磁気特性が良くなかっ
た。したがって、回転機器の小型化およびコスト低減の
点から、鉄損などの磁気特性の一層の改良が望まれてい
る。また、螺旋加工での加工精度もあまり良くなく、螺
旋コアは一般に螺旋加工後に巻き付け、接合した状態で
使用されるが現状であり、螺旋加工後の形状修正もでき
ないので、加工精度では打抜きコアに劣っていた。特
に、方向性電磁鋼板は結晶粒度が大きいため、螺旋加工
自身の精度が低くなる可能性がある。このために、螺旋
コアの使用は回転子と固定子の間のギャップが比較的大
きい場合に限られるか、または螺旋加工した電磁鋼板を
研磨して寸法精度を高くする必要があった。Recently, a grain-oriented electrical steel sheet has made it possible to form a spiral core whose thickness does not change even after spiral processing. But,
The magnetic characteristics of the core back portion of this spiral core were not good. Therefore, from the viewpoints of downsizing of rotary equipment and cost reduction, further improvement of magnetic characteristics such as iron loss is desired. In addition, the processing accuracy in the spiral processing is not so good, and the spiral core is generally used in the state of being wound and joined after the spiral processing, which is the current state. It was inferior. In particular, since the grain size of grain-oriented electrical steel sheets is large, the accuracy of spiral machining itself may be low. For this reason, the use of the spiral core is limited to the case where the gap between the rotor and the stator is relatively large, or it is necessary to polish the spirally machined electromagnetic steel plate to improve the dimensional accuracy.
【０００４】[0004]
【発明が解決しようとする課題】この発明は、磁気特性
に優れ、高い形状精度の回転機器用螺旋コア、およびそ
の製造方法を提供することを目的としている。SUMMARY OF THE INVENTION It is an object of the present invention to provide a spiral core for rotating equipment having excellent magnetic characteristics and high shape accuracy, and a manufacturing method thereof.
【０００５】[0005]
【課題を解決するための手段】この発明の回転機器用螺
旋コアは、方向性電磁鋼板を用いた回転機器用螺旋コア
において、螺旋コアのティース長さＬ、コアバック部平
均直径Ｄ、および界磁極数Ｐが下記の式で示される関係
にある。 ２／Ｐ＜Ｄ／（ＰＬ）＜１．５ ここで、コアバック部とはコアのうちティースを除いた
部分をいう。A spiral core for a rotating machine according to the present invention is a spiral core for a rotating machine using a grain-oriented electrical steel sheet, wherein a tooth length L of the spiral core, a core back portion average diameter D, and a field. The number of magnetic poles P has a relationship represented by the following formula. 2 / P <D / (PL) <1.5 Here, the core back portion refers to a portion of the core excluding the teeth.
【０００６】この発明の方向性電磁鋼板の螺旋コアは電
動機その他の回転機に用いるが、螺旋コアのラジアル方
向を磁化容易軸である＜１００＞とすることが望まし
い。螺旋コアがティース付きである場合、ティース方向
＜１００＞を活用するには、回転機が多極機であって、
ティースが長い方がよい。螺旋コアのティース長さＬ、
コアバック部平均直径Ｄおよび界磁極数Ｐが上記の式の
関係にあると、次に述べるように螺旋コアの磁気特性は
向上する。The spiral core of the grain-oriented electrical steel sheet according to the present invention is used in electric motors and other rotating machines, and it is desirable that the radial direction of the spiral core be <100> which is the easy axis of magnetization. When the spiral core has teeth, in order to utilize the teeth direction <100>, the rotating machine is a multi-pole machine,
The longer the teeth, the better. Teeth length L of the spiral core,
When the average diameter D of the core back portion and the number P of field poles have the relationship of the above equation, the magnetic characteristics of the spiral core are improved as described below.
【０００７】コアバック部は磁束が円周方向に正弦波分
布しているものとして有効磁路を計算した場合、１極当
たりのコアバック部の有効磁路２Ｄ／Ｐに対し、ティー
スが２個対応するので、ティースに対するコアバック比
率はＤ／（ＰＬ）となる。一方、方向性電磁鋼板の＜１
００＞方向の磁気特性は、無方向性電磁鋼板よりも磁気
特性が優れており、たとえば鉄損は少なくとも１／４以
下とすることができる。方向性電磁鋼板の＜１１０＞方
向の鉄損は、無方向性電磁鋼板と同程度の鉄損を示す。
したがって、方向性電磁鋼板を使用した場合のコストア
ップを考慮すると、コア鉄損を３０％以上少なくする必
要がある。コアの鉄損を３０％少なくするには、（２Ｄ
／Ｐ）／（２Ｌ）＜３／２である必要がある。すなわ
ち、無方向性電磁鋼板のティ−ス部の鉄損を無次元表示
で１とすると、コアバック部の鉄損ｘはＤ／（ＰＬ）と
なり、螺旋コアの全鉄損は１＋ｘとなる。一方、方向性
電磁鋼板のティース部の鉄損は１×１／４、コアバック
部の鉄損はｘ×１であり、全鉄損は１／４＋ｘとなる。
したがって、（１／４＋ｘ）／（１＋ｘ）＜０．７とす
るには、ｘ＝Ｄ／（ＰＬ）＜１．５となる。Ｄ／（Ｐ
Ｌ）は、小さいほど効果が大きいことは言うまでもない
が、一般にティース長さＬはコアバック部平均直径Ｄの
１／２以下であるので、Ｄ／（ＰＬ）の下限は２／Ｐと
なる。ここでは鉄損について述べたが、他の磁気特性に
ついても同様なことが言える。When the effective magnetic path is calculated on the assumption that the magnetic flux is sinusoidal distributed in the circumferential direction in the core back portion, two teeth are provided for the effective magnetic path 2D / P of the core back portion per pole. Correspondingly, the ratio of core back to teeth is D / (PL). On the other hand, <1 of grain-oriented electrical steel
The magnetic properties in the 00> direction are superior to those of the non-oriented electrical steel sheet, and the iron loss can be at least 1/4 or less, for example. The core loss of the grain-oriented electrical steel sheet in the <110> direction is about the same as that of the non-oriented electrical steel sheet.
Therefore, considering the cost increase when using the grain-oriented electrical steel sheet, it is necessary to reduce the core iron loss by 30% or more. To reduce core iron loss by 30%, use (2D
It is necessary that / P) / (2L) <3/2. That is, assuming that the iron loss of the tooth portion of the non-oriented electrical steel sheet is 1 in a non-dimensional display, the iron loss x of the core back portion is D / (PL), and the total iron loss of the spiral core is 1 + x. On the other hand, the iron loss of the tooth portion of the grain-oriented electrical steel sheet is 1 × 1/4, the iron loss of the core back portion is xx1, and the total iron loss is 1/4 + x.
Therefore, in order to satisfy (1/4 + x) / (1 + x) <0.7, x = D / (PL) <1.5. D / (P
Needless to say, the smaller L) is, the larger the effect is, but since the tooth length L is generally 1/2 or less of the average diameter D of the core back portion, the lower limit of D / (PL) is 2 / P. Although iron loss is described here, the same can be said for other magnetic characteristics.
【０００８】上記螺旋コアにおいて、重なり合う電磁鋼
板どうしを接合するか、または螺旋コアが一体として固
定部材で固定することが望ましい。In the above-mentioned spiral core, it is preferable that the electromagnetic steel plates that overlap each other are joined together, or that the spiral core is integrally fixed by a fixing member.
【０００９】この発明の回転機器用螺旋コアの製造方法
は、帯状方向性電磁鋼板の片側のエッジを螺旋コアの内
周側とし、電磁鋼板を螺旋状に成形する螺旋コアの製造
方法において、螺旋加工の内周側形状に応じた形状の螺
旋加工成形型の外周に、電磁鋼板の前記エッジが接する
ようにして電磁鋼板を巻き付けて螺旋加工する。A method of manufacturing a spiral core for a rotating machine according to the present invention is a method of manufacturing a spiral core in which one edge of a strip-shaped grain-oriented electrical steel sheet is an inner peripheral side of the spiral core and the magnetic steel sheet is spirally formed. The electromagnetic steel sheet is wound around the outer periphery of the spiral working die having a shape corresponding to the inner peripheral side shape of the processing so that the edges of the electromagnetic steel sheet are in contact with each other, and the spiral processing is performed.
【００１０】方向性電磁鋼板は、主な板面方位が｛１１
０｝であり、磁化容易方向＜１００＞の集積度が高い通
常の電磁鋼板である。方向性電磁鋼板は、Ｓｉを含むも
の、Ｓｉ含有量が０．１％以下であるもの等の主成分が
Ｆｅであるものであるが、結晶構造が体心立方格子（ｂ
ｃｃ）である他の磁性材料であってもよい。The main grain orientation of grain-oriented electrical steel sheets is {11
0}, which is a normal magnetic steel sheet having a high degree of integration in the easy magnetization direction <100>. The grain-oriented electrical steel sheet is one in which the main component is Fe, such as one containing Si, one having a Si content of 0.1% or less, and a crystal structure having a body-centered cubic lattice (b).
Other magnetic materials of cc) may also be used.
【００１１】電磁鋼板の螺旋巻き角は、３６０゜以上
（すなわち１巻き以上）、または３６０゜未満（たとえ
ば、９０゜、１８０゜、１２０゜）のいずれであっても
よい。螺旋加工後に、研磨、切断、焼鈍、または表面処
理などを行ってもよい。螺旋巻き角が３６０゜未満の場
合、加工した電磁鋼板を円周方向につなぎ合わせて螺旋
コアを形成する。螺旋加工成形後のスプリングバックを
考慮して螺旋加工し、螺旋加工後の応力フリーの状態で
目標の螺旋形状となるようにしてもよい。この場合、固
定部材を用いなくても、高精度の螺旋コアを作製するこ
とができる。スロットを有するコアの場合、スロット形
状に合わせた形状の成形型を用いると、高い寸法精度の
螺旋コアを得ることができる。複数の形状あるいは寸法
のセグメントを組み合わせて螺旋加工成形型を構成して
もよい。コアバック部、およびティースの寸法を前記の
ように規定した方向性電磁鋼板を用いた螺旋コア、ある
いは固定部材等で固定された方向性電磁鋼板を用いた螺
旋コアを、螺旋加工成形型により製造してもよい。The helical wrap angle of the magnetic steel sheet may be 360 ° or more (that is, one turn or more) or less than 360 ° (eg, 90 °, 180 °, 120 °). After the spiral processing, polishing, cutting, annealing, surface treatment, or the like may be performed. When the spiral winding angle is less than 360 °, the processed electromagnetic steel sheets are circumferentially connected to form a spiral core. The target spiral shape may be formed in a stress-free state after the spiral processing by considering the spring back after the spiral processing. In this case, a highly accurate spiral core can be manufactured without using a fixing member. In the case of a core having a slot, a spiral core with high dimensional accuracy can be obtained by using a mold having a shape that matches the slot shape. A spiral working mold may be formed by combining segments having a plurality of shapes or sizes. Manufacture a spiral core using a grain-oriented electrical steel sheet whose core back portion and teeth are specified as described above, or a grain core using a grain-oriented electrical steel sheet fixed by a fixing member, etc. You may.
【００１２】螺旋加工した電磁鋼板は、重なり合うどう
しのものを接合、または重ね合わせて一体とする。螺旋
成形した方向性電磁鋼板の重なり合うものどうしをかし
めや溶接で接合したり、螺旋コアを固定部材で固定した
りすることにより、高い形状精度を得ることができる。
接合手段として、接合部材（たとえば、ねじ、ボルト・
ナットなど）、かしめ、溶接、ろう付けなどが用いられ
る。これら接合手段のいくつかを組み合わせて接合する
ようにしてもよい。かしめは、接合できれば螺旋コアの
どの部分でもよいが、螺旋加工で殆ど変形しないティー
スまたはティース近傍のコアバック部であることが好ま
しい。溶接またはろう付けは、最終形状に固定して、積
層面に行うとよい。回転機駆動時に、コアでの層間電流
が生じないように位置を選ぶことが望ましい。溶接はＴ
ＩＧ溶接、レーザ溶接などどの様なものでもよい。螺旋
加工しながら重なり合う電磁鋼板どうしを接合するよう
にしてもよい。螺旋コアを固定するには、固定部材（回
転機のケーシングなど）に固定する、あるいは固定部材
（ボルト等のコア固定棒など）を用いて固定する。固定
部材を用いることにより、螺旋コアを高い寸法精度を有
する所定の形状に、矯正して固定することができる。[0012] The spirally processed electromagnetic steel plates are made by joining or superimposing overlapping ones. A high shape accuracy can be obtained by crimping or welding together the overlapping parts of the spirally formed grain-oriented electrical steel sheets or by fixing the spiral core with a fixing member.
As a joining means, joining members (for example, screws, bolts,
Nuts, etc.), caulking, welding, brazing, etc. are used. You may make it join, combining some of these joining means. The caulking may be any part of the spiral core as long as it can be joined, but it is preferable that the caulking is a tooth or a core back part in the vicinity of the tooth that is hardly deformed by spiral processing. Welding or brazing may be performed on the laminated surface after fixing to the final shape. It is desirable to select the position so that the interlayer current does not occur in the core when driving the rotating machine. Welding is T
Any type such as IG welding or laser welding may be used. You may make it join the electromagnetic steel plates which overlap, making spiral processing. To fix the spiral core, it is fixed to a fixing member (a casing of a rotating machine or the like) or a fixing member (a core fixing rod such as a bolt or the like) is used. By using the fixing member, the spiral core can be straightened and fixed to a predetermined shape having high dimensional accuracy.
【００１３】[0013]
【発明の実施の形態】図１〜図３は、いずれも螺旋コア
よりなる回転機固定子部（一部）を示している。螺旋コ
ア１、２、３はそれぞれコアバック部１ａ、２ａ、３ａ
とティース１ｂ、２ｂ、３ｂとからなり、方向性電磁鋼
板で作られている。ティース長さＬ、コアバック部平均
直径Ｄ、および界磁極数Ｐの関係が下記の式を満たすよ
うに、各部の寸法が決められている。 ２／Ｐ＜Ｄ／（ＰＬ）＜１．５BEST MODE FOR CARRYING OUT THE INVENTION All of FIGS. 1 to 3 show a rotary machine stator portion (part) made of a spiral core. The spiral cores 1, 2 and 3 are core back portions 1a, 2a and 3a, respectively.
And teeth 1b, 2b, 3b and made of grain-oriented electrical steel. The dimensions of each part are determined so that the relationship between the tooth length L, the core back part average diameter D, and the field pole number P satisfies the following formula. 2 / P <D / (PL) <1.5
【００１４】図１に示す螺旋コア１は、コア外周をケー
シング内周で保持し、螺旋コア１を一体としてケーシン
グ４に固定している。コア外周はケーシング内周で拘束
され、保持されているので、ティース先端の位置精度は
高い。In the spiral core 1 shown in FIG. 1, the outer circumference of the core is held by the inner circumference of the casing, and the spiral core 1 is integrally fixed to the casing 4. Since the outer periphery of the core is restrained and held by the inner periphery of the casing, the positional accuracy of the tooth tips is high.
【００１５】図２に示す螺旋コア２は、重なり合う電磁
鋼板どうしをかしめ５で接合している。コアバック部２
ａの幅方向のほぼ中心の位置６で、重なり合う電磁鋼板
どうしをかしめているので、かしめ５による螺旋コアの
変形はほとんどなく、高い寸法精度で螺旋コアを製作す
ることができる。In the spiral core 2 shown in FIG. 2, overlapping electromagnetic steel sheets are joined together by caulking 5. Core back part 2
Since the overlapping electromagnetic steel sheets are caulked at a position 6 approximately at the center of the width direction of a, the caulking 5 causes almost no deformation of the spiral core, and the spiral core can be manufactured with high dimensional accuracy.
【００１６】図３は、重なり合う電磁鋼板どうしをＴＩ
Ｇ溶接７で接合した例を示す。溶接位置は、コアバック
部外周とティース中心線との交点、およびティース先端
である。溶接位置は、回転機駆動時でも磁束による層間
電流は生じない位置となっている。FIG. 3 shows the TI and
An example of joining by G welding 7 is shown. The welding positions are the intersection of the outer circumference of the core back portion and the tooth center line, and the tooth tip. The welding position is a position where the interlayer current due to the magnetic flux does not occur even when the rotating machine is driven.
【００１７】図４は、螺旋コア製造装置全体の構成を模
式的に示している。帯状の方向性電磁鋼板８はパンチン
グ装置１１に導かれ、ここでコアバック部９ａとティー
ス９ｂととからなるティース付き電磁鋼板９に打ち抜か
れる。ついで、ティース付き電磁鋼板９は螺旋加工装置
１３に送られ、螺旋加工される。FIG. 4 schematically shows the structure of the entire spiral core manufacturing apparatus. The strip-shaped grain-oriented electrical steel sheet 8 is guided to the punching device 11, where it is punched into a toothed electrical steel sheet 9 composed of a core back portion 9a and teeth 9b. Next, the magnetic steel sheet 9 with teeth is sent to the spiral processing device 13 and spirally processed.
【００１８】図５は螺旋加工装置の平面図、図６は図２
のａ−ａ断面図、図７は図２のｂ−ｂ断面図である。テ
ィース付き電磁鋼板９は、ガイドプレート１５とガイド
ローラ１６とに案内され、送り車１８とつめ車２１とで
挟み込まれて螺旋加工装置１３の成形部２３に送り込ま
れる。つめ車２１は回転駆動されており、つめ２２が重
なり合うティース９ｂの間にはめ合ってティース付き電
磁鋼板９を成形部２３に押し進める。FIG. 5 is a plan view of the spiral machining apparatus, and FIG. 6 is FIG.
7 is a sectional view taken along line aa of FIG. 7, and FIG. 7 is a sectional view taken along line bb of FIG. The magnetic steel sheet 9 with teeth is guided by the guide plate 15 and the guide roller 16, is sandwiched by the feed wheel 18 and the pawl wheel 21, and is fed to the forming portion 23 of the spiral machining device 13. The pawl wheel 21 is rotationally driven, and the pawls 22 are fitted between the overlapping teeth 9b to push the magnetic steel plate 9 with teeth toward the forming portion 23.
【００１９】成形部２３は、主として成形型２４と成形
ロール群２９とで構成されている。成形型２４はティー
ス９ｂの数だけのセグメント２７が型テーブル２６の外
周に沿って配置されている。型テーブル２６は、駆動装
置（図示しない）により回転駆動される。各セグメント
２７は断面が弧状をしており、エアシリンダ（図示しな
い）により独立して昇降される。セグメント２７の外周
側曲率半径はティース付き電磁鋼板９のコアバック部９
ａの内周側半径に等しく、また円周方向の長さはティー
ス間隔よりわずかに小さい。成形ロール群２９は円周溝
３１をもった成形ロール３０よりなっている。成形ロー
ル３０は、セグメント１個に対し２個の割合で、セグメ
ント２７の外側にほぼ３／４円周にわたって配置されて
いる。セグメント２７と成形ロール３０との間隔は、ほ
ぼティース付き電磁鋼板９のコアバック部９ａの幅とな
っている。各成形ロール３０も駆動装置（図示しない）
により、回転駆動される。成形ロール群２９の内側に、
環状の下押えプレート３３および上押えプレート３５が
配置されている。The forming section 23 is mainly composed of a forming die 24 and a forming roll group 29. The molding die 24 has as many segments 27 as the teeth 9 b arranged along the outer periphery of the die table 26. The mold table 26 is rotationally driven by a driving device (not shown). Each segment 27 has an arc-shaped cross section and is independently moved up and down by an air cylinder (not shown). The radius of curvature on the outer peripheral side of the segment 27 is the core back portion 9 of the magnetic steel sheet 9 with teeth.
It is equal to the inner radius of a and the length in the circumferential direction is slightly smaller than the tooth spacing. The forming roll group 29 includes a forming roll 30 having a circumferential groove 31. The forming rolls 30 are arranged on the outer side of the segment 27 at a ratio of two to one segment for about 3/4 circumference. The interval between the segment 27 and the forming roll 30 is substantially the width of the core back portion 9a of the magnetic steel sheet 9 with teeth. Each forming roll 30 also has a driving device (not shown)
Is driven to rotate. Inside the forming roll group 29,
An annular lower presser plate 33 and an upper presser plate 35 are arranged.
【００２０】上記のように構成された螺旋加工装置にお
いて、型テーブル２５および成形ロール３０は回転駆動
される。成形部２３に送られてきたティース付き電磁鋼
板９は、下押えプレート３３および上押えプレート３５
で板厚方向を押さえられた状態で、成形型２４と成形ロ
ーラ群２９とにより、弧状に塑性変形される。成形部２
３の入口から１／４円周入った所で、螺旋加工はほぼ完
了する。セグメント２７のうち成形部２３の入口に来た
ものはエアシリンダで下降され、ティース９ｂに突き当
たらないように下方に退避する。螺旋加工されたティー
ス付き電磁鋼板９は、下押えプレート３３および上押え
プレート３５により螺旋軸方向に沿って上方に導かれ
る。上記のように螺旋加工成形型を用いることにより、
ティース間のスロットは高い形状精度で加工される。In the spiral machining apparatus constructed as described above, the mold table 25 and the molding roll 30 are rotationally driven. The magnetic steel sheet 9 with teeth sent to the forming unit 23 is provided with a lower presser plate 33 and an upper presser plate 35.
While being pressed in the plate thickness direction by, the mold 24 and the forming roller group 29 are plastically deformed into an arc shape. Molding part 2
The spiral machining is almost completed at the place where a quarter circle is entered from the entrance of 3. The segment 27 that comes to the inlet of the molding portion 23 is lowered by the air cylinder and retracts downward so as not to hit the tooth 9b. The helically machined magnetic steel sheet 9 with teeth is guided upward by the lower pressing plate 33 and the upper pressing plate 35 along the spiral axis direction. By using the spiral forming mold as described above,
The slots between the teeth are processed with high shape accuracy.
【００２１】[0021]
【実施例】磁極数２４、ティース数３６の電機子コアを
螺旋コアで試作した。コアバック部の平均直径は１００
mm、ティース長さは１０mmである。コア素材は０．５mm
厚さの方向性電磁鋼板であり、Ｄ／（ＰＬ）は０．４１
である。従来例として、０．５mm厚さの無方向性電磁鋼
板（ＪＩＳ Ｃ２５５２ ５０Ａ１３００）の螺旋コア
を作製した。方向性電磁鋼板の螺旋コアでは、ティース
方向が＜１００＞である。方向性電磁鋼板の螺旋コアの
鉄損は、従来例に比べ約１／４であった。Example An armature core having 24 magnetic poles and 36 teeth was prototyped with a spiral core. The average diameter of the core back is 100
mm, teeth length is 10 mm. 0.5 mm core material
It is a grain-oriented electrical steel sheet and has a D / (PL) of 0.41.
It is. As a conventional example, a spiral core of a non-oriented electrical steel sheet (JIS C2552 50A1300) having a thickness of 0.5 mm was produced. In the spiral core of the grain-oriented electrical steel sheet, the tooth direction is <100>. The iron loss of the spiral core of the grain-oriented electrical steel sheet was about 1/4 of that of the conventional example.
【００２２】[0022]
【発明の効果】この発明の回転機器用螺旋コアは、ティ
ース長さ、コアバック部平均直径および界磁極数が前記
のように特定の関係にあるので、螺旋コアの磁気特性は
向上する。また、重なり合う電磁鋼板どうしを接合する
か、または螺旋コアが一体として固定部材で固定するこ
とにより、高い形状精度を得ることができる。In the spiral core for a rotating machine of the present invention, the tooth length, the average diameter of the core back portion and the number of field poles have the specific relationships as described above, so that the magnetic characteristics of the spiral core are improved. In addition, high shape accuracy can be obtained by joining overlapping electromagnetic steel sheets or fixing the spiral core as a unit with a fixing member.
【００２３】この発明の回転機器用螺旋コアの製造方法
は、螺旋加工の内周側形状に応じた形状の螺旋加工成形
型の外周に、電磁鋼板のエッジが接するようにして電磁
鋼板を巻き付けて螺旋加工する。このため、スロット部
を高い精度で螺旋加工することができ、また螺旋加工後
に形状修正する必要もない。In the method for manufacturing a spiral core for a rotating machine according to the present invention, the electromagnetic steel sheet is wound around the outer periphery of the spiral machining die having a shape corresponding to the inner peripheral side shape of the spiral machining so that the edges of the electromagnetic steel sheet are in contact with each other. Spiral processing. Therefore, the slot portion can be spirally processed with high accuracy, and it is not necessary to modify the shape after the spiral processing.
【００２４】上記のように、磁気特性に優れ、あるいは
高い形状精度の回転機器用螺旋コアを得ることができる
ので、回転機の小型軽量化、高効率化に大きく依存する
固定子と回転子の間のギャップを螺旋コアにて実現でき
る。また、この発明の螺旋コアの製造方法では、螺旋コ
ア製造ラインでの省ライン化が可能であり、螺旋コアの
低コスト化を図ることができる。As described above, since it is possible to obtain a spiral core for a rotating machine having excellent magnetic characteristics or high shape accuracy, it is possible to reduce the size and weight of the rotating machine and increase the efficiency of the stator and the rotor. The gap between them can be realized by the spiral core. In addition, according to the method of manufacturing the spiral core of the present invention, it is possible to reduce the number of lines in the spiral core manufacturing line, and it is possible to reduce the cost of the spiral core.
【図１】ケーシングに固定された螺旋コア（回転機固定
子）を示す図面である。FIG. 1 is a view showing a spiral core (rotating machine stator) fixed to a casing.
【図２】重なり合う電磁鋼板コアを、かしめで接合した
例を示す図面である。FIG. 2 is a drawing showing an example in which overlapping electromagnetic steel sheet cores are joined by caulking.
【図３】重なり合う電磁鋼板を、溶接で接合した例を示
す図面である。FIG. 3 is a diagram showing an example in which overlapping electromagnetic steel sheets are joined by welding.
【図４】螺旋コア製造設備を模式的に示す全体図であ
る。FIG. 4 is an overall view schematically showing a spiral core manufacturing facility.
【図５】図４に示す螺旋コア製造設備に設けられた螺旋
加工装置の平面図である。5 is a plan view of a spiral machining device provided in the spiral core manufacturing facility shown in FIG. 4. FIG.
【図６】図５のａ−ａ線断面図である。FIG. 6 is a sectional view taken along line aa of FIG. 5;
【図７】図５のｂ−ｂ線断面図である。FIG. 7 is a sectional view taken along line bb of FIG. 5;
１ 螺旋コア ２ 螺旋コア ３ 螺旋コア ４ ケーシング ５ かしめ ６ 溶接 ８ 帯状方向性電磁鋼板 ９ ティース付き方向性電磁鋼板 ９ａ コアバック部 ９ｂ ティース １１ パンチング装置 １３ 螺旋加工装置 ２３ 成形部 ２４ 成形型 ２７ セグメント ２９ 成形ロール群 ３０ 成形ロール ３３ 下押えプレート ３５ 上押えプレート 1 Spiral core 2 Spiral core 3 Spiral core 4 Casing 5 Caulking 6 Welding 8 Strip-shaped grain oriented electrical steel sheet 9 Directional electrical steel sheet with teeth 9a Core back part 9b Teeth 11 Punching device 13 Spiral processing device 23 Forming part 24 Forming die 27 Segment 29 Forming roll group 30 Forming roll 33 Lower press plate 35 Upper press plate
Claims (5)
において、螺旋コアのティース長さＬ、コアバック部平
均直径Ｄ、および界磁極数Ｐが下記の式で示される関係
にあることを特徴とする回転機器用螺旋コア。 ２／Ｐ＜Ｄ／（ＰＬ）＜１．５1. In a helical core for rotating equipment made of a grain-oriented electrical steel sheet, the tooth length L of the helical core, the core back portion average diameter D, and the field pole number P have a relationship represented by the following equation. A characteristic spiral core for rotating equipment. 2 / P <D / (PL) <1.5
請求項１記載の回転機器用螺旋コア。2. The spiral core for a rotating machine according to claim 1, wherein the overlapping electromagnetic steel plates are joined together.
れた請求項１記載の回転機器用螺旋コア。3. The spiral core for a rotating machine according to claim 1, wherein the spiral core is integrally fixed by a fixing member.
旋コアの内周側として電磁鋼板を螺旋状に成形する螺旋
コアの製造方法において、螺旋加工の内周側形状に応じ
た形状の螺旋加工成形型の外周に、電磁鋼板の前記エッ
ジが接するようにして電磁鋼板を巻き付けて螺旋加工す
ることを特徴とする回転機器用螺旋コアの製造方法。4. A spiral core manufacturing method for spirally forming an electromagnetic steel sheet with one edge of a strip-shaped grain-oriented electrical steel sheet as the inner peripheral side of the spiral core, wherein the spiral has a shape corresponding to the shape of the inner peripheral side of spiral processing. A method for manufacturing a spiral core for a rotating machine, comprising winding an electromagnetic steel sheet around an outer periphery of a processing mold so that the edges of the electromagnetic steel sheet are in contact with each other and performing a spiral process.
うしを接合する請求項４記載の回転機器用螺旋コアの製
造方法。5. The method for manufacturing a spiral core for a rotating machine according to claim 4, wherein the overlapping electromagnetic steel sheets are joined together while being spirally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24408495A JP3499983B2 (en) | 1995-09-22 | 1995-09-22 | Spiral core for rotating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24408495A JP3499983B2 (en) | 1995-09-22 | 1995-09-22 | Spiral core for rotating equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0992561A true JPH0992561A (en) | 1997-04-04 |
| JP3499983B2 JP3499983B2 (en) | 2004-02-23 |
Family
ID=17113503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24408495A Expired - Lifetime JP3499983B2 (en) | 1995-09-22 | 1995-09-22 | Spiral core for rotating equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3499983B2 (en) |
Cited By (8)
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| JP2014121136A (en) * | 2012-12-14 | 2014-06-30 | Denso Corp | Method of manufacturing stator core of rotary electric machine |
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| JP2014121136A (en) * | 2012-12-14 | 2014-06-30 | Denso Corp | Method of manufacturing stator core of rotary electric machine |
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