JP3555016B2

JP3555016B2 - Rotating electric machines and electromagnetic devices using magnets

Info

Publication number: JP3555016B2
Application number: JP19640399A
Authority: JP
Inventors: 幸雄木下
Original assignee: 幸雄木下
Priority date: 1999-06-08
Filing date: 1999-06-08
Publication date: 2004-08-18
Anticipated expiration: 2019-06-08
Also published as: JP2000354341A

Description

［０００１］
［発明の属する技術分野］
この発明は、磁石単独や電磁石と併用して用いる回転子を有する電動機や発電機及び電磁機器において、起動トルクやコギングを軽減するため、固定子と対峙する鉄心間に設けたスリットにスキューを設けた磁極構造に関する。
［０００２］
【従来の技術】従来の発電機や電動機の回転子は通常円筒状の磁石を用い、それに着磁時に磁極間の境界にスキューしたスペースを設けて行っている。この場合着磁設備に膨大な費用がかかり中少量生産には適さなかった。又円筒状の磁石では磁界形成に限界があり、高出力や高効率の機器には適さなかった。
［０００３］
【発明が解決しようとする課題】
そこで本発明は交流発電機や電動機等の回転子のスキュー溝を有する鉄心構造及びその構成等により、高出力や高効率電機達成のための放射型磁極配置での▲１▼スキュー形成により起動改善やコギング低減の実現、それに▲２▼生産性の向上等を解決することを課題とする。
［０００４］
【課題を解決するための手段】
▲１▼スキュー形成により起動改善やコギング低減の実現であるが、放射配置の直方体形状の磁石は通常用いられている積層鉄心のスキュー溝には、同じ形状の鉄板の積層では、ねじれ状の溝になるため隙間無しには挿入出来ない。さらにねじれ状の溝にぴったりした磁石を作ることは非常にコストが高くなり経済的ではない。そこで、鉄心の形状に工夫を凝らし、直方体形状の磁石でも隙間無しに挿入出来るようにし、鉄心の保持やシャフトとの隔離を目的とした多角形の非磁性体の辺にそってスキュー溝を形成するようにする。この場合スキュー幅Ｗをかえる場合（ａ）同じ多角形の非磁性体の場合に辺の長さをＬとした場合、０≦Ｗ≦１／２Ｌの範囲でかえる。（ｂ）多角形の非磁性体の辺の長さＬを変えてＷ＝１／２Ｌによりかえる。（ｃ）（ａ），（ｂ）にてもスキュー幅Ｗが不足の場合は、鉄心を軸方向に分割し、分割した鉄心の多角形の非磁性体の辺長Ｌによるスキュー幅Ｗの限界（１／２Ｌ）内で最大分割数ｋの倍数のスキュー幅Ｗ＝１／２ｋＬを形成できる。又軸方向にｎ分割にしたストレートな（スキュー無）鉄心に，ｎ分割した磁石を軸に平行に挿入後スキュー角によってｎ個の鉄心を隣接する鉄心相互に回転配置してジグザグ溝をまず形成し、その外部に（外転型回転子の場合は内部に）ストレートなスキュー溝を施した円筒状の鉄心を配置してスキュー効果を持たせて実現する。円筒状の鉄心を用いる場合ジグザグ溝による磁気特性の改善やスキュー幅を微調整するため鉄心の厚さを厚くする必要がある場合、工作上複数の鉄心で行う。この場合に生産性を上げるため、磁石鉄心や外周配置の円筒状の鉄心に積層鉄心をもちいてもよい。
又、回転子鉄心を一体の積層鉄心にて行う場合は、磁石を挿入した際に鉄心との隙間が生じない程度に、磁石をスキュー溝に挿入可能な数に分割することにより、生産性を飛躍的に向上できる。さらに、電機の特性を強さの異なる磁石の組み合せなどにより特性の変更や改善が容易に出来るようになる。
▲２▼生産性の向上についてであるが、鉄ブロックによる鉄心形成は中量産には不向きである。理想的には固定子コアと回転子コアを一体で作るのが望ましい。そこでいくつかの積層鉄心を部分又は全体に使えるように磁石鉄心にスキュー形成用の等ピッチ孔を設けたり、その構成を工夫して実現した。
［０００５］
［実施の形態］
以下、この発明の実施の形態を図面を参照して内転型発電機を例に説明する。
図１は内転型の発電機で図１ａが本発明のスキュー構造を有し、磁石１単独や電磁石１０との組み合せにて構成した回転子３を有する発電機の断面構造を示し、図１ｂは従来の円筒型磁石回転子３′を用いた発電機の断面構造を示す。回転子は動力源により外から駆動されると固定子２、２’に巻き込んでいるコイル５等に回転数に応じた電圧が発生し、電気取り出しコード９、９’に抵抗等負荷をつなげば電流が流れ電力を供給する。コイルの発生電圧は固定子と回転子との空隙の磁束密度に比例し、又回転数にも比例する。本発明は回転子に放射状に配した磁石にて形成した磁石式回転子の起動トルクやコギングを軽減するためスキューを形成し、さらにその生産性を考慮したいくつかの例を示めす。
【０００６】次に本発明の磁石式スキュード回転子についてその鉄心構造・材質・構成、非磁性体スペーサーの構造等について以下図面に基づき説明する。図２は内転型四極の電機に用いるスキューを施した磁石式回転子の鉄心構造を示し、図２ａは内転型電機に用いる分割鉄心１２で平面図と両側の側面図を示している。この場合スキュー幅Ｗを形成すると同時に四角形非磁性体１４の稜線を跨ぎ幅Ｗにて跨ぐように係合する内径部分を形成（この図では直角の切り欠き部分ｄを形成）するとともに、鉄心の回り止め機能の同時に持たせるようにしている。図２ｂは図２ａの分割鉄心１２を四個組み合わせ四極電機のスキューを施した磁石式回転子を構成したもので平面図と両側面図を示している。この場合形成出来るスキュー幅Ｗは鉄心外徑、磁石寸法（特に放射方向寸法）、多角形非磁性体の辺の長さ等により自ずと限界があり、四角形非磁性体１４の一辺の長さＬとした時Ｗ＝１／２Ｌを最大として０から１／２Ｌまでスキュー可能となる。そこで、さらに大きなスキューを行う場合は、図２ｃに示す例は鉄心１２を軸方向に四分割にした場合で、各鉄心にて最大のスキュー幅Ｗ＝１／２Ｌを施し、それらのスキューを総合して図２ｂでのスキューの約四倍のスキュー幅４Ｗを実現した例を示している。１２ｃの場合、シャフト８に圧入等で固着した非磁性体１４’も四分割し、しかもシャフトに固着する時スキュー形成が直線状やジグザグ状など、目的に応じてうまく出来るように適切な角度を相互にずらしたりすることがポイントとなる。これにより、スキュー幅や形を目的に応じて自由自在に変えて形成出来るようになる。
［０００７］
図３は図２で示した四極の回転子に対し、六極と８極の例を示しており、図３ａは６極の構成例を示し、スキュー幅Ｗ′はＷ′≦１／２Ｌ′で形成出来、図３ｂは八極の構成例を示し、スキュー幅Ｗ″はＷ″≦１／２Ｌ″で形成出来ている。
図４はスキュー幅をかえる場合に非磁性体１４ｃ、１４ｄ、１４ｅの外徑を変えて行う例を八極の回転子を例に示している。非磁性体は外徑が１４ｅ＞１４ｄ＞１４ｃとなっており、スキュー幅も外徑の大きさに比例して大きくなっていて、Ｗ１∠Ｗ２∠Ｗ３となっている。この場合磁界の強さを維持するため、磁石１３ｄ、ｅは１３ｃに比べ放射方向の長さの減少を磁石の幅の増加で補っている。これら多極の回転子も図２ｃで示した鉄心の軸方向の分割にて同様にスキュー幅を自由自在に変えうることは言うまでもない。
［０００８］
図５、６、７は回転子の鉄心を分割し、放射状及び軸方向に平行に挿入した磁石をスキューに応じてある角度軸心に対しずらしてジグザグにスキューを形成した、鉄心部の外周にスキュー溝を有する円筒状の鉄心を配置したスキュード磁石式回転子を示している。この場合磁石挿入鉄心２３、２３ａは単一の鉄のブロック材は勿論、積層鉄板でも製作可能で、低コストで生産性抜群の構造となっている。鉄心に開けている孔２２、２２ａ，２２ｂは同一円周上に位置し、スキュー角に合せて同一ピッチで複数個設けていて、分割した鉄心間での結合組み立てがスムーズに行えるようになっている。図５は円筒状鉄心２４が一重の場合で、磁石２１ａ，２１ｂ，２１ｃをそれぞれ挿入した鉄心を孔２２を用いてジグザグにスキューさせた後、円筒状鉄心２４を外周に配置した構造となっている。スキューを大きくする場合は磁石２１ａ，ｂ，ｃの幅やスキュー溝２０ｇなどの幅を大きくして、鉄心間の孔２２を大きくずらすことにより達成できる。鉄心部分を積層鉄心にした場合は固定子の鉄心と同一製作工具で同時抜きで製作出来るのでコスト、生産性は非常に優れたものとなる。
図６は図５の磁石鉄心の外周に配置した円筒状鉄心２４の代わりに複数の円筒状鉄心２４ａ，ｂ，ｃに置き換えたもので、図５の円筒状鉄心２４が厚くなった場合に生産性を上げるために厚さ方向を分割して目的を達成するもので、さらに分割した円筒状鉄心のスキューを外部のものほど大きくして固定子と対峙する空隙でのスキュー幅の微調整や鉄心空隙部の磁気特性の改善が出来る特徴がある。
図７は円筒状鉄心の材質に積層鉄心２６にし、誘導電動機等の駕籠型回転子などで通常行われているスキューを施した円筒状鉄心でジグザグスキュー磁石鉄心の外周に配置した例である。この場合鉄心類は全て積層材で出来るようになり、生産コスト、生産性抜群の量産に適した磁石式スキュード回転子を提供可能となる。
［０００９］
図８は回転子鉄心を一体の積層鉄心２５にて製作しスキュー後、鉄心とのギャップが最少になるように分割した複数の磁石（特性を調節出来るようにするため特性の異なるものでもよい）を外周より挿入して形成した磁石式スキュード回転子の例をしめす。この場合に鉄心スロットより磁石の飛び出しを防止するために別途かしめ、圧入、溶接あるいは別部品のリングなどで固着するようにしている。この例は一体の積層鉄心となっているため、前述の実施例に比べ、生産性抜群で量産に適した磁石式スキュード回転子を提供可能となる。
［００１０］
以上内転型回転電機について説明してきたが、外転型回転電機にも反転構造になっているので内転型同様適用出来るのはいうまでもない。また、発電機について説明を行ってきたが、これらの技術は他の磁石を用いるあらゆる電機や電磁機器に適用出来ることはいうまでもない。例えば放射状以外の磁石を有する回転子、パンケーキタイプ電機、リニアーモータ、電磁石機器等。
【発明の効果】
以上説明したように、本発明は磁石式スキュード回転子を有する電動機や発電機の鉄心構造、材質や構成などを見直し、スキュー幅を自由自在に変化出来る構造を考案して、電機の起動トルクやコギングを低減出来、しかもコスト的に安く、設備費のかからない電機を実現できる。特にブロック回転子鉄心の分割・分離構造でのスキュー形成と同時に転りどめ多角形非磁性体の稜線またぎ構造、多角形非磁性体の一辺の長さを変えてスキュー角を変化させる方法、磁石鉄心を複数分割してスキュー幅を自由自在に変えうるようにしたものなど画期的な考案が多々含まれている。また、量産時の生産性を上げるため、鉄心に積層鉄板を使用可能にした鉄心構造の数々もコストパフオーマンスに優れたもので有効性大といえる。
【図面の簡単な説明】
［図１］本発明の磁石式スキュード回転子にて構成した回転子を有する内転型発電機の一実施例を示す構造図と従来型発電機の構造説明図
［図２］四極の分割、分離磁石鉄心を正方形の非磁性体に配した磁石式スキュード回転子の構造の例を示す図
［図３］六極及び八極の分割、分離磁石鉄心を正六及び八角形の非磁性体に配した磁石式スキュード回転子の例を示す説明図
［図４］外徑の異なる三種類の正八角形の非磁性体に配した磁石鉄心を有する磁石式スキュード回転子の例を示す説明図
［図５］積層鉄心等を用いたジグザグ磁石鉄心とスキュー溝つき円筒鉄心を組み合わせた磁石式スキュード回転子の例を示す説明図
［図６］積層鉄心等を用いたジグザグ磁石鉄心と複数のスキュー溝つき円筒鉄心を組み合わせた磁石式スキュード回転子の例を示す説明図
［図７］積層板を用いた鉄心等を用いたジグザグ磁石鉄心とスキュー溝つき積層板円筒鉄心を組み合わせた磁石式スキュード回転子の例を示す説明図
［図８］スキューした積層板鉄心に複数に分割した特性が同一又は異なる磁石を配した磁石式スキュード回転子の例を示す説明図
【符号の説明】
１’ ：磁石
２、２’ ：固定子
３：磁石式スキュード回転子
３’ ：円筒型磁石回転子
４、４’ ：ハウジング
５、５’ ：コイル
６、６’ ：エンドブラケット
７、７’ ：軸受け
８、８’、８ａ，８ｂ，８ｃ，８ｄ，８ｅ：シャフト
９、９’ ：電源コード
１０：電磁石
１１、１１’：ベース
１２、１２ａ，１２ｂ，１２ｃ，１２ｄ，１２ｅ、：分割鉄心
１３，１３ａ，１３ｂ，１３ｃ，１３ｄ，１３ｅ，２１ａ，２１ｂ，２１ｃ，２１ｄ，２１ｅ，２１ｆ，２１ｇ，２１ｈ，２１ｉ，３１，３２，３３：磁石
１４，１４’、１４ａ，１４ｂ，１４ｃ，１４ｄ，１４ｅ：非磁性体
２０ａ，２０ａ’，２０ｂ，２０ｃ，２０ｄ，２０ｅ，２０ｆ，２０ｇ、２０ｈ、２０ｉ，２０ｊ：スキュー溝
ｄ：鉄心内徑切り欠き部
Ｎ，Ｓ：磁石の極性
ｗ，ｗ’，ｗ“，ｗ_１，ｗ_２，ｗ_３，ｗ_４，ｗ_５，ｗ_６，ｗ_７、４ｗ：スキュー幅
Ｌ，Ｌ’，Ｌ“，Ｌ_１，Ｌ_２，Ｌ_３：非磁性体の辺の幅
２２，２２ａ，２２ｂ：孔
２３，２３ａ，２５，２６：積層鉄心
２４，２４ａ，２４ｂ，２４ｃ：円筒状スキュー溝付き鉄心[0001]
[Technical field to which the invention belongs]
The present invention provides a skew in a slit provided between an iron core facing a stator in an electric motor, a generator, and an electromagnetic device having a rotor used alone or in combination with an electromagnet in order to reduce starting torque and cogging. Magnetic pole structure.
[0002]
2. Description of the Related Art A rotor of a conventional generator or electric motor usually uses a cylindrical magnet, and a skewed space is provided at a boundary between magnetic poles when the magnet is magnetized. In this case, the magnetizing equipment required enormous cost and was not suitable for medium-to-low-volume production. Further, a cylindrical magnet has a limit in forming a magnetic field, and is not suitable for a device with high output and high efficiency.
[0003]
[Problems to be solved by the invention]
Therefore, the present invention improves the start-up by forming a skew in (1) skew in a radiation type magnetic pole arrangement to achieve a high output and a high efficiency electric machine by using an iron core structure having a skew groove of a rotor such as an alternator or an electric motor and its configuration. And cogging reduction, and (2) improvement of productivity.
[0004]
[Means for Solving the Problems]
(1) Improving start-up and reducing cogging by forming skew. A cuboid magnet with a radial arrangement is usually used in a skew groove of a laminated iron core, and a twisted groove is formed by laminating iron plates of the same shape. Can not be inserted without a gap. Furthermore, making magnets that fit into the twisted grooves is very costly and not economical. Therefore, we devised the shape of the iron core so that even rectangular magnets can be inserted without gaps, and formed skew grooves along the sides of the polygonal non-magnetic material for the purpose of holding the iron core and isolating it from the shaft. To do. In this case, when the skew width W is changed (a) When the length of the side is L in the case of a non-magnetic material having the same polygon, the width is changed in the range of 0 ≦ W ≦ １／ L. (B) Change the length L of the side of the polygonal non-magnetic material to W = により L. (C) If the skew width W is insufficient even in (a) and (b), the iron core is divided in the axial direction, and the skew width W is limited by the side length L of the polygonal nonmagnetic material of the iron core. A skew width W = 1/2 kL which is a multiple of the maximum division number k within (1 / 2L) can be formed. Also, a zigzag groove is first formed by inserting a magnet divided into n parallel to the axis into a straight (no skew) iron core divided into n in the axial direction, and then rotating the n iron cores relative to the adjacent iron cores according to the skew angle. A skew effect is realized by arranging a cylindrical iron core having a straight skew groove on the outside thereof (in the case of an abduction type rotor). When a cylindrical iron core is used When it is necessary to increase the thickness of the iron core in order to improve the magnetic characteristics by the zigzag groove and finely adjust the skew width, the work is performed with a plurality of iron cores on the work. In this case, in order to increase the productivity, a laminated core may be used as the magnet core or the cylindrical core arranged on the outer periphery.
Also, when the rotor core is made of an integral laminated core, productivity is increased by dividing the magnet into a number that can be inserted into the skew groove to the extent that no gap is created between the magnet and the core. It can be dramatically improved. Further, the characteristics of the electric machine can be easily changed or improved by combining magnets having different strengths.
▲ 2 ▼ although about the improved productivity, the iron core formed by iron block is not suitable for medium volume production. Ideally, it is desirable to make the stator core and the rotor core integrally. Therefore, the magnet core is provided with equal pitch holes for skew so that some of the laminated cores can be used partially or entirely, or by devising the configuration.
[0005]
[Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the drawings, taking an adduction type generator as an example.
FIG. 1 shows an adduction type generator. FIG. 1a shows a cross-sectional structure of a generator having a skew structure of the present invention, and having a rotor 3 constituted by a magnet 1 alone or in combination with an electromagnet 10. FIG. Shows a sectional structure of a generator using a conventional cylindrical magnet rotor 3 '. When the rotor is driven from the outside by a power source, a voltage corresponding to the number of revolutions is generated in the coil 5 and the like wound on the stators 2 and 2 ', and a load such as a resistor is connected to the electric extraction cords 9 and 9'. Current flows and supplies power. The voltage generated by the coil is proportional to the magnetic flux density in the air gap between the stator and the rotor, and is also proportional to the number of revolutions. The present invention shows several examples in which a skew is formed in order to reduce the starting torque and cogging of a magnet type rotor formed by magnets radially arranged on the rotor, and further considering its productivity.
Next, the structure, material, and configuration of the iron core of the magnetic skewed rotor of the present invention, the structure of the nonmagnetic spacer, and the like will be described below with reference to the drawings. FIG. 2 shows a core structure of a skewed magnet type rotor used for an adduction type quadrupole electric machine, and FIG. 2a shows a plan view and side views of a split core 12 used for an adduction type electric machine. In this case, at the same time as forming the skew width W, an inner diameter portion is formed so as to straddle the ridge line of the quadrangular non-magnetic member 14 so as to straddle with the width W (in this figure, a cutout portion d at a right angle is formed), and the iron core is formed. It has a detent function at the same time. FIG. 2B is a plan view and side views showing a skewed magnet rotor of a quadrupole electric machine constructed by combining four split cores 12 of FIG. 2A. In this case, the skew width W that can be formed is naturally limited by the outer diameter of the iron core, the size of the magnet (particularly the size in the radial direction), the length of the side of the polygonal non-magnetic material, and the like. Then, skew can be performed from 0 to 1 / 2L with W = 1 / 2L as the maximum. Therefore, when an even larger skew is performed, the example shown in FIG. 2C is a case where the iron core 12 is divided into four in the axial direction, and a maximum skew width W = １／ L is applied to each iron core, and the skew is integrated. FIG. 2B shows an example in which a skew width 4 W which is about four times the skew in FIG. 2B is realized. In the case of 12c, the nonmagnetic material 14 'fixed to the shaft 8 by press fitting or the like is also divided into four parts, and when it is fixed to the shaft, an appropriate angle such as a straight line or a zigzag shape can be formed according to the purpose. The point is to shift each other. As a result, the skew width and shape can be changed freely according to the purpose.
[0007]
FIG. 3 shows an example of six poles and eight poles with respect to the quadrupole rotor shown in FIG. 2, FIG. 3a shows a configuration example of six poles, and the skew width W 'is W'≤1 / 2L'. FIG. 3B shows an example of an eight-pole configuration, and the skew width W ″ can be formed with W ″ ≦ １／ L ″.
FIG. 4 shows an example in which the skew width is changed by changing the outer diameter of the non-magnetic members 14c, 14d, and 14e, using an octupole rotor as an example. The non-magnetic material has an outer diameter of 14e>14d> 14c, and the skew width also increases in proportion to the outer diameter, ie, W1∠W2∠W3. In this case, in order to maintain the strength of the magnetic field, the magnets 13d and 13e compensate for the decrease in the length in the radial direction compared to the magnet 13c by increasing the width of the magnet. Needless to say, the skew width of these multi-pole rotors can also be freely changed by dividing the iron core in the axial direction shown in FIG. 2C.
[0008]
FIGS. 5, 6, and 7 show the rotor core in which the rotor core is divided, and the magnets inserted radially and in parallel to the axial direction are shifted with respect to an angle axis in accordance with the skew to form a zigzag skew. 2 shows a skewed magnet type rotor in which a cylindrical iron core having a skew groove is arranged. In this case, the magnet insertion cores 23 and 23a can be manufactured not only from a single iron block material but also from a laminated iron plate, and have a low cost and excellent productivity. The holes 22, 22a and 22b formed in the iron core are located on the same circumference and are provided at the same pitch in accordance with the skew angle, so that the assembling between the divided iron cores can be performed smoothly. I have. FIG. 5 shows a case where the cylindrical iron core 24 is single. The iron core into which the magnets 21a, 21b, 21c are inserted is skewed in a zigzag manner using the holes 22, and the cylindrical iron core 24 is arranged on the outer periphery. I have. The skew can be increased by increasing the width of the magnets 21a, b, and c and the width of the skew groove 20g to largely shift the hole 22 between the iron cores. When the core is made of a laminated core, it can be manufactured simultaneously with the same manufacturing tool as the stator core, so that the cost and productivity are extremely excellent.
FIG. 6 shows a case where a plurality of cylindrical cores 24a, 24b, and 24c are used in place of the cylindrical core 24 arranged on the outer periphery of the magnet core shown in FIG. 5. When the cylindrical core 24 shown in FIG. In order to improve the performance, the purpose is achieved by dividing the thickness direction, and the skew of the divided cylindrical iron core is made larger as the outer one, and fine adjustment of the skew width in the gap facing the stator and iron core There is a feature that the magnetic properties of the gap can be improved.
FIG. 7 shows an example in which a laminated iron core 26 is used as the material of the cylindrical iron core, and a skewed cylindrical iron core that is usually used in a peg-shaped rotor such as an induction motor is disposed around the zigzag skew magnet iron core. . In this case, all the iron cores can be made of laminated materials, and it is possible to provide a magnet type skewed rotor suitable for mass production excellent in production cost and productivity.
[0009]
FIG. 8 shows a plurality of magnets in which a rotor core is made of an integrated laminated core 25, and after skew, is divided into a plurality of magnets so as to minimize the gap with the iron core (the magnets may have different characteristics in order to adjust the characteristics). An example of a magnet-type skewed rotor formed by inserting from the outer periphery is shown. In this case, the magnet is separately caulked in order to prevent the magnet from protruding from the iron core slot, and is fixed by press fitting, welding, or a ring of another component. In this example, since it is an integral laminated iron core, it is possible to provide a magnet type skewed rotor excellent in productivity and suitable for mass production as compared with the above-described embodiment.
[0010]
The internal rotation type rotary electric machine has been described above, but it is needless to say that the internal rotation type rotary electric machine can be applied similarly to the internal rotation type since the external rotation type rotary electric machine also has an inverted structure. Although the description has been given of the generator, it goes without saying that these techniques can be applied to any electric or electromagnetic device using other magnets. For example , a rotor having a non-radial magnet, a pancake type electric machine, a linear motor, an electromagnet device, and the like.
【The invention's effect】
As described above, the present invention reviews the iron core structure of a motor or a generator having a magnet type skewed rotor, the material and configuration, etc., devises a structure that can freely change the skew width, and reduces the starting torque of the electric machine. It is possible to realize an electric machine which can reduce cogging, is inexpensive, and does not require equipment costs. In particular, the skew is formed simultaneously with the division / separation structure of the block rotor core, and the skew angle is changed by changing the length of one side of the polygonal non-magnetic material by changing the length of one side of the polygonal non-magnetic material. There are many groundbreaking ideas, such as one in which the magnet core is divided into multiple parts so that the skew width can be freely changed. Also, in order to increase productivity during mass production, many iron core structures that can use laminated iron plates for the iron core have excellent cost performance and can be said to be highly effective.
[Brief description of the drawings]
FIG. 1 is a structural view showing an embodiment of an adduction type generator having a rotor constituted by a magnet type skewed rotor according to the present invention, and a structural explanatory view of a conventional type generator. FIG. Fig. 3 shows an example of the structure of a magnet type skewed rotor in which a separated magnet core is arranged on a square non-magnetic body. [Fig. 3] Divided into six poles and eight poles, and separated magnet cores are arranged on regular hexagonal and octagonal non-magnetic bodies. FIG. 4 is an explanatory view showing an example of a magnet type skewed rotor shown in FIG. 4. FIG. 5 is an explanatory view showing an example of a magnet type skewed rotor having magnet cores arranged on three types of regular octagonal non-magnetic materials having different outer diameters. FIG. 6 is an explanatory view showing an example of a magnet type skewed rotor combining a zigzag magnet core using a laminated iron core and a cylindrical iron core with a skew groove [FIG. 6] Magnet skewed rotation combined with iron core [FIG. 7] An explanatory diagram showing an example of a magnet type skewed rotor combining a zigzag magnet core using a core using a laminated plate or the like and a laminated plate cylindrical core with skew grooves [FIG. 8]. Diagram showing an example of a magnet-type skewed rotor in which a plurality of magnets having the same or different characteristics are arranged in a plurality of laminated cores.
1 ': Magnet 2, 2': Stator 3: Magnetic skewed rotor 3 ': Cylindrical magnet rotor 4, 4': Housing 5, 5 ': Coil 6, 6': End bracket 7, 7 ': Bearings 8, 8 ', 8a, 8b, 8c, 8d, 8e: Shafts 9, 9': Power cord 10: Electromagnets 11, 11 ': Bases 12, 12a, 12b, 12c, 12d, 12e, Split iron cores 13, 13a, 13b, 13c, 13d, 13e, 21a, 21b, 21c, 21d, 21e, 21f, 21g, 21h, 21i, 31, 32, 33: magnets 14, 14 ', 14a, 14b, 14c, 14d, 14e. : Non-magnetic material 20a, 20a ', 20b, 20c, 20d, 20e, 20f, 20g, 20h, 20i, 20j: Skew groove d: Notched portion N, S of core inner diameter: Magnet polarity w _{_{_{w ', w ", w 1}}} , w 2, w 3, w 4, w 5, w 6, w 7, 4w: skew width _{L, L', L",} L 1, L 2, L 3: a non-magnetic Body side widths 22, 22a, 22b: Holes 23, 23a, 25, 26: Laminated cores 24, 24a, 24b, 24c: Cores with cylindrical skew grooves

Claims

In a rotating electric machine of N pole which forms a rotor by using a permanent magnet alone or in combination with an electromagnet, the rotor is provided between a rotor shaft and a rotating core in forming a skew of a rotor to reduce starting torque and cogging. By gradually changing, in the axial direction, the ratio of the bridging width of the divided rotating core inner surface that is in contact with the spacer outer surface across the axial ridge line of the regular N-gonal nonmagnetic spacer, the slot shape formed by the rotating core and the spacer is changed. A rotating electric machine characterized in that a long rectangular parallelepiped permanent magnet can be inserted without generating a gap with a slot.

2. The rotating electric machine according to claim 1, wherein the skew amount is arbitrarily changed to 1/2 of one side of the polygon of the spacer by changing the bridging width of the inner surface of the rotating core beyond 0 to 1/2 of one side of the polygon of the spacer. A rotating electric machine characterized by being able to do so.

3. The rotating electric machine according to claim 2, wherein a skew amount can be changed by changing a length of one side of the polygon of the spacer.

The rotating electric machine according to claim 1, wherein the rotating core and the non-magnetic spacer are K-divided in the direction of the rotor axis, and skews formed by the configuration according to claim 1 are arranged in series on the rotor axis, and divided. A rotating electric machine characterized by forming a skew amount that is K times the skew amount of a divided rotating core by rotating each of the divided spacers and sequentially shifting the respective skew amounts in the rotation direction.

2. The rotary electric machine according to claim 1, wherein the rotor core formed by combining the N divided rotor cores with a coupling member forms a rotor, so that the divided rotor core has a simple shape formed by a combination of open planes in contact with a spacer. A rotating electric machine characterized by being capable of facilitating machining and improving productivity and accuracy.

In a rotating electric machine that forms a rotor by using a permanent magnet alone or in combination with an electromagnet, a slot for radially inserting a permanent magnet into a rotor core in forming a skew in a gap with a stator to reduce starting torque and cogging. Is mounted on the rotor shaft, and when the magnetic pole is the N pole, the opposing surface of the rotor core is formed along the side of the spacer made of N-sided non-magnetic material, and K equal in the axial direction The skew is formed in a zigzag manner by shifting the angle of each rotor core and spacer by each skew amount so that even a rectangular parallelepiped magnet can be inserted straight into the laminated iron core without generating a slot gap. A skew is formed by forming a cylindrical magnetic pole whose slit width is adjusted to minimize magnetic short-circuit and magnetic flux leakage due to zigzag skew around the outer core. Rotating electric machine, characterized in that which gave results.

7. The rotating electric machine according to claim 6, wherein a laminated core is formed with coupling holes in accordance with the pitch of the zigzag shift angle so that the zigzag skew can be formed with the same iron core.

7. The rotating electric machine according to claim 6, wherein a skew effect is provided by a cylindrical magnetic pole formed of a laminated steel sheet having a slit formed so as to minimize magnetic short-circuit and magnetic flux leakage.

7. The rotating electric machine according to claim 6, wherein a plurality of cylindrical magnetic poles whose skew widths are increased as the external cylindrical magnetic poles are provided so as to further enhance the skew effect.

According to claim 6, a cylindrical magnetic pole having a slit formed to minimize magnetic short-circuit and magnetic flux leakage and a laminated iron core are combined, and a cylindrical iron core is arranged on an outer peripheral portion of a rotor core, and an outer peripheral portion thereof is provided. A rotating electric machine characterized by providing a more effective skew effect by arranging laminated iron cores on the other side or forming them in the reverse arrangement.