JP4568639B2 - Stator - Google Patents

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JP4568639B2
JP4568639B2 JP2005144053A JP2005144053A JP4568639B2 JP 4568639 B2 JP4568639 B2 JP 4568639B2 JP 2005144053 A JP2005144053 A JP 2005144053A JP 2005144053 A JP2005144053 A JP 2005144053A JP 4568639 B2 JP4568639 B2 JP 4568639B2
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stator
yoke
teeth
coil
wound
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JP2006325295A (en
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卓郎 釘宮
正良 木村
司 合葉
章央 能島
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Honda Motor Co Ltd
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Description

本発明は、コイルが巻回される複数のティースと、周方向に分割され、前記各ティースに連結して環状に配設されるヨークとから構成されるステータに関する。   The present invention relates to a stator including a plurality of teeth around which a coil is wound, and a yoke that is divided in a circumferential direction and connected to each of the teeth to be annularly disposed.

近年、電動機の分野において、高効率なDCブラシレスモータが広汎に使用されている。図5は、従来の3相4極6スロットのDCブラシレスモータ2の概略構成を示す。   In recent years, highly efficient DC brushless motors have been widely used in the field of electric motors. FIG. 5 shows a schematic configuration of a conventional three-phase four-pole six-slot DC brushless motor 2.

DCブラシレスモータ2は、中心部に回転軸4を有し、外周部に4個の永久磁石6が固定されたロータ8と、ロータ8の外周部に配設され、コイル10が巻回された複数のティース12をヨーク14によって周方向に一体的に連結したステータ16とを備える。なお、ステータ16は、回転軸4の方向に複数の電磁鋼板を積層して構成される。   The DC brushless motor 2 has a rotating shaft 4 at the center, a rotor 8 having four permanent magnets 6 fixed to the outer periphery, and an outer periphery of the rotor 8, and a coil 10 is wound around the rotor 8. And a stator 16 in which a plurality of teeth 12 are integrally connected in a circumferential direction by a yoke 14. The stator 16 is configured by laminating a plurality of electromagnetic steel plates in the direction of the rotating shaft 4.

このように構成されるDCブラシレスモータ2は、コイル10に三相交流電流を流してステータ16に交番磁界を発生させ、この交番磁界と永久磁石6の磁界とによって発生する反発力を利用してロータ8を回転させる。   The DC brushless motor 2 configured as described above causes a three-phase alternating current to flow through the coil 10 to generate an alternating magnetic field in the stator 16, and uses a repulsive force generated by the alternating magnetic field and the magnetic field of the permanent magnet 6. The rotor 8 is rotated.

ところで、前記のステータ16は、ティース12及びヨーク14が一体となった複雑な構造であるため、1枚の電磁鋼板から形成されるステータ16の歩留まりが悪く、高価となる不具合がある。   By the way, since the stator 16 has a complicated structure in which the teeth 12 and the yoke 14 are integrated, there is a problem that the yield of the stator 16 formed from one electromagnetic steel sheet is poor and expensive.

そこで、図6に示すように、ティース18とヨーク20とを分割するとともに、ヨーク20を周方向に分割し、これらを連結してステータ22とした従来技術が開発されている(特許文献1、2参照)。この場合、ティース18及びヨーク20の形状が単純化されるため、1枚の電磁鋼板からティース18及びヨーク20を高い歩留まりで形成することができる。   Therefore, as shown in FIG. 6, a conventional technique has been developed in which the teeth 18 and the yoke 20 are divided and the yoke 20 is divided in the circumferential direction to connect them to form a stator 22 (Patent Document 1, 2). In this case, since the shapes of the teeth 18 and the yoke 20 are simplified, the teeth 18 and the yoke 20 can be formed from a single electromagnetic steel sheet with a high yield.

また、特許文献2に開示された従来技術では、ティース18及びヨーク20の連結部分における磁気抵抗及び鉄損の増大を回避するため、ヨーク20を各ティース18の位置で分割するとともに、ティース18及びヨーク20間の接合線24の方向が磁束の方向と略直行するように設定している。   In the prior art disclosed in Patent Document 2, the yoke 20 is divided at the positions of the teeth 18 in order to avoid an increase in magnetic resistance and iron loss at the connecting portion of the teeth 18 and the yoke 20, and the teeth 18 and The direction of the joint line 24 between the yokes 20 is set so as to be substantially perpendicular to the direction of the magnetic flux.

さらに、特許文献1、2では、矢印で示す時間の方向に合わせてティース18及びヨーク20を構成する電磁鋼板の磁化容易方向を設定している。   Further, in Patent Documents 1 and 2, the easy magnetization direction of the electrical steel sheets constituting the teeth 18 and the yoke 20 is set in accordance with the time direction indicated by the arrows.

特開2004−56906号公報JP 2004-56906 A 特開2004−236495号公報JP 2004-236495 A

ところで、ティース18及びヨーク20を分割してステータ22とする場合、接合線24における磁束の漏洩を可能な限り少なくするため、ティース18及びヨーク20を隙間なく強固に連結する必要がある。この場合、特許文献1では、ティース18に突起26を設け、この突起26をヨーク20に係合させることにより、相互の連結強度を確保している。   By the way, when the teeth 18 and the yoke 20 are divided into the stator 22, it is necessary to firmly connect the teeth 18 and the yoke 20 without gaps in order to reduce the leakage of magnetic flux in the joining line 24 as much as possible. In this case, in Patent Document 1, a protrusion 26 is provided on the tooth 18, and the protrusion 26 is engaged with the yoke 20 to ensure mutual connection strength.

しかしながら、突起26をティース18及びヨーク20の接合線24の部分に設けているため、突起26の周辺で磁束の方向が乱れ、磁気抵抗及び鉄損が増大してしまう不具合が発生する。   However, since the protrusion 26 is provided in the portion of the joint line 24 of the tooth 18 and the yoke 20, the direction of the magnetic flux is disturbed around the protrusion 26, causing a problem that the magnetic resistance and the iron loss increase.

本発明は、前記の不具合に鑑みてなされたもので、磁気抵抗及び鉄損を低減し、効率的に回転トルクを発生させることのできるステータを提供することを目的とする。   The present invention has been made in view of the above problems, and an object of the present invention is to provide a stator that can reduce magnetic resistance and iron loss and can efficiently generate rotational torque.

本発明のステータは、コイルが巻回される複数のティースと、周方向に分割され、前記各ティースに連結して環状に配設されるヨークとから構成されるステータにおいて、前記ティースは、前記コイルが巻回される部位から当該ステータの径方向に向かって二辺の間隔が徐々に幅狭となる直線状の接合部と、前記接合部の外径側の端部から当該ステータの周方向両側に突出する係合部とを備え、前記接合部に前記ヨークの端部が接合するとともに、前記係合部に前記ヨークの端部が係合し、前記接合部は、一辺の長さが前記コイルが巻回される部位における前記ティースの幅と、前記ヨークの幅とのいずれか狭い幅の方に合わせた長さに設定されることを特徴とする。 The stator of the present invention is a stator including a plurality of teeth around which a coil is wound and a yoke that is divided in a circumferential direction and is annularly connected to each of the teeth. A linear joint where the distance between the two sides gradually decreases from the portion around which the coil is wound in the radial direction of the stator, and the circumferential direction of the stator from the outer diameter side end of the joint and a engaging portion projecting to both sides, with an end portion of the yoke in the joint portion is joined, the engagement end of the yoke to the engaging portion is engaged, the joint has a length of one side It is characterized in that the length is set in accordance with the narrower one of the width of the teeth and the width of the yoke at the portion where the coil is wound .

この場合、コイルに通電することで発生した磁束は、ティースとヨークとの接合部を介して円滑に流れる。また、ティースとヨークとは、磁束に殆ど影響を与えることのないステータの径方向端部側に形成された係合部により強固に連結される。   In this case, the magnetic flux generated by energizing the coil flows smoothly through the joint between the tooth and the yoke. Further, the teeth and the yoke are firmly connected by an engaging portion formed on the radial end portion side of the stator that hardly affects the magnetic flux.

本発明のステータでは、コイルによって発生した磁束がティースとヨークとの接合部を介して円滑に流れるとともに、ティース及びヨークを強固に連結する係合部が磁束に影響を与えることのない部位に形成されているため、磁気抵抗及び鉄損を低減して効率的に回転トルクを発生させることができる。   In the stator of the present invention, the magnetic flux generated by the coil flows smoothly through the joint between the tooth and the yoke, and the engaging portion that firmly connects the tooth and the yoke is formed in a portion that does not affect the magnetic flux. Therefore, the rotational resistance can be generated efficiently by reducing the magnetic resistance and the iron loss.

図1は、本実施形態に係るインナーロータ型のステータ30の構成図である。   FIG. 1 is a configuration diagram of an inner rotor type stator 30 according to the present embodiment.

ステータ30は、図2に示すように、スロット32を介して円周状に配設される複数のティース34と、ティース34を連結して環状に配設される複数のヨーク36とから構成される。連結されたティース34及びヨーク36は、電動機の軸線方向に積層されてステータ30となる。また、積層されたティース34には、図3に示すように、絶縁部材からなるボビン40に巻回されたコイル38が装着される。   As shown in FIG. 2, the stator 30 includes a plurality of teeth 34 that are circumferentially arranged via slots 32 and a plurality of yokes 36 that are annularly arranged by connecting the teeth 34. The The connected teeth 34 and yoke 36 are stacked in the axial direction of the electric motor to form the stator 30. Further, as shown in FIG. 3, a coil 38 wound around a bobbin 40 made of an insulating member is attached to the stacked teeth 34.

ティース34には、一端部に鍔状部42が形成され、コイル38が巻回される中間部44が略平行に延在した後、ステータ30の径方向外方に向かって徐々に幅狭となる直線状の接合部46が形成され、他端部にステータ30の周方向両側に突出する係合部48が形成される。なお、鍔状部42は、隣接して配設されるティース34間に所定の磁気ギャップ50を形成する。   The teeth 34 are formed with a hook-like portion 42 at one end, and an intermediate portion 44 around which the coil 38 is wound extends substantially in parallel, and then gradually becomes narrower outward in the radial direction of the stator 30. The linear joint portion 46 is formed, and the engaging portion 48 that protrudes on both sides in the circumferential direction of the stator 30 is formed at the other end portion. Note that the hook-shaped portion 42 forms a predetermined magnetic gap 50 between adjacent teeth 34.

一方、ヨーク36には、ティース34の接合部46に接合する接合部52と、ティース34の係合部48に係合する係合部54とが両端部に形成される。   On the other hand, the yoke 36 is formed with a joint portion 52 that joins the joint portion 46 of the tooth 34 and an engagement portion 54 that engages the engagement portion 48 of the tooth 34 at both ends.

ティース34及びヨーク36が接合される接合部46、52の長さは、図2の円で示すように、ティース34の中間部44の幅とヨーク36の幅とのいずれか狭い方の幅に合わせて設定される。なお、図2に示すステータ30では、ヨーク36の幅に合わせて接合部46、52の長さが設定されている。また、接合部46、52の延在方向は、ティース34の延在方向と、ヨーク36の延在方向とを略二等分した方向に設定される。   The lengths of the joint portions 46 and 52 to which the teeth 34 and the yoke 36 are joined are set to the narrower one of the width of the intermediate portion 44 of the teeth 34 and the width of the yoke 36 as shown by a circle in FIG. It is set together. In the stator 30 shown in FIG. 2, the lengths of the joint portions 46 and 52 are set in accordance with the width of the yoke 36. In addition, the extending direction of the joint portions 46 and 52 is set to a direction obtained by dividing the extending direction of the teeth 34 and the extending direction of the yoke 36 into approximately two equal parts.

本実施形態のステータ30は、基本的にには以上のように構成されるものであり、次に、ステータ30の組立手順及びその作用効果について説明する。   The stator 30 of the present embodiment is basically configured as described above. Next, the assembly procedure of the stator 30 and the operation and effect thereof will be described.

先ず、図4に示すように、電磁鋼板56を矢印方向に圧延した後、圧延方向に対して長手方向を一致させた状態でティース34及びヨーク36を打ち抜く。なお、電磁鋼板56に形成された孔部58は、ティース34及びヨーク36を打ち抜く際の位置決めに利用される。   First, as shown in FIG. 4, after rolling the magnetic steel sheet 56 in the direction of the arrow, the teeth 34 and the yoke 36 are punched in a state where the longitudinal direction coincides with the rolling direction. The hole 58 formed in the electromagnetic steel plate 56 is used for positioning when the teeth 34 and the yoke 36 are punched out.

この場合、電磁鋼板56の比透磁率は、圧延方向に大きくなる傾向があるため、ティース34及びヨーク36の磁気抵抗及び鉄損は、長手方向が小さくなる。また、ティース34及びヨーク36は、いずれも長尺な形状からなるため、これらを長手方向に沿って電磁鋼板56に配置して打ち抜くことにより、電磁鋼板56を有効に活用し、高い歩留まりでティース34及びヨーク36を量産することができる。   In this case, since the relative permeability of the electromagnetic steel sheet 56 tends to increase in the rolling direction, the longitudinal direction of the magnetic resistance and iron loss of the teeth 34 and the yoke 36 decreases. Further, since the teeth 34 and the yoke 36 are both long, the electromagnetic steel plates 56 are effectively used by placing them on the electromagnetic steel plates 56 along the longitudinal direction, and the teeth 34 can be manufactured with high yield. 34 and the yoke 36 can be mass-produced.

電磁鋼板56から打ち抜かれたティース34及びヨーク36は、所定枚数が積層される。そして、ボビン40の外周部にコイル38を巻回した後、図3に示すように、ボビン40を積層状態のティース34の係合部48側から中間部44に装着する。すなわち、ティース34は、端部の係合部48側が中間部44よりも幅狭となっているため、ボビン40の外周部にコイル38を巻回した後、ティース34に装着することができる。従って、コイル38の巻回作業を極めて容易に行うことができる。   A predetermined number of teeth 34 and yokes 36 punched from the electromagnetic steel sheet 56 are laminated. And after winding the coil 38 around the outer peripheral part of the bobbin 40, as shown in FIG. 3, the bobbin 40 is mounted | worn with the intermediate part 44 from the engaging part 48 side of the teeth 34 of the lamination | stacking state. That is, since the teeth 34 are narrower at the end of the engaging portion 48 side than the intermediate portion 44, the teeth 34 can be attached to the teeth 34 after the coil 38 is wound around the outer peripheral portion of the bobbin 40. Therefore, the winding operation of the coil 38 can be performed very easily.

中間部44にコイル38が装着されたティース34は、積層状態のヨーク36と連結され、ステータ30が組み立てられる。すなわち、ティース34の接合部46に対してヨーク36の接合部52が接合され、また、ティース34の係合部48に対してヨーク36の係合部54が係合される。そして、係合部48、54間の部位がステータ30の外周側から溶接接合されることで、ステータ30の製造が完了する。   The teeth 34 having the coil 38 attached to the intermediate portion 44 are connected to the laminated yoke 36, and the stator 30 is assembled. That is, the joint portion 52 of the yoke 36 is joined to the joint portion 46 of the tooth 34, and the engagement portion 54 of the yoke 36 is engaged with the engagement portion 48 of the tooth 34. And the site | part between the engaging parts 48 and 54 is weld-joined from the outer peripheral side of the stator 30, and manufacture of the stator 30 is completed.

以上のようにして製造されたステータ30は、永久磁石60を介して中央部に図示しないロータが組み付けられることにより、電動機が完成する。   The stator 30 manufactured as described above is assembled with a rotor (not shown) at the center via the permanent magnet 60, thereby completing the electric motor.

このようにして製造された電動機において、コイル38に三相交流電流を通電すると、図2の矢印に示すように、ティース34、ヨーク36及び永久磁石60間で磁束が流れ、コイル38による磁界と永久磁石60の磁界とによって発生する反発力によってロータが回転する。   In the electric motor manufactured in this manner, when a three-phase alternating current is passed through the coil 38, magnetic flux flows between the teeth 34, the yoke 36 and the permanent magnet 60 as shown by the arrows in FIG. The rotor is rotated by a repulsive force generated by the magnetic field of the permanent magnet 60.

この場合、発生した磁束は、ティース34及びヨーク36間の直線状の接合部46、52と直交する方向に流れ、図2に示す円の外側であるティース34及びヨーク36がかしめ固定されている係合部48の部分を流れることが殆どない。また、ティース34及びヨーク36は、二重矢印で示すように、磁束の流れ方向に沿って磁化容易方向が設定されている。従って、磁束は、磁気抵抗及び鉄損が極めて小さい状態で効率的に流れることになる。   In this case, the generated magnetic flux flows in a direction orthogonal to the linear joints 46 and 52 between the teeth 34 and the yoke 36, and the teeth 34 and the yoke 36 which are outside the circle shown in FIG. There is almost no flow through the engaging portion 48. The teeth 34 and the yoke 36 have an easy magnetization direction along the flow direction of the magnetic flux, as indicated by a double arrow. Therefore, the magnetic flux efficiently flows in a state where the magnetic resistance and the iron loss are extremely small.

さらに、本実施形態では、組み立てられたステータ30を構成するティース34及びヨーク36の係合部48、54を溶接によって強固に接合している。この場合、溶接接合されている係合部48、54が図2に示す円の外側であるため、ティース34、ヨーク36間の磁束の流れが係合部48、54及びその溶接部位によって乱されることがない。従って、磁気抵抗及び鉄損が十分に低減された状態で磁束を流し、ロータを十分な回転トルクで回転させることができる。   Further, in the present embodiment, the teeth 34 and the engaging portions 48 and 54 of the yoke 36 constituting the assembled stator 30 are firmly joined by welding. In this case, since the engaging portions 48 and 54 which are welded and joined are outside the circle shown in FIG. 2, the flow of magnetic flux between the teeth 34 and the yoke 36 is disturbed by the engaging portions 48 and 54 and the welding portions thereof. There is nothing to do. Therefore, the magnetic flux can be passed in a state where the magnetic resistance and the iron loss are sufficiently reduced, and the rotor can be rotated with sufficient rotational torque.

さらにまた、ティース34に巻回されるコイル38は、ティース34をヨーク36に組み付ける前の状態で中間部44に巻回させることができる。この場合、ティース34間のスロット32の空間を有効に活用し、十分な巻線占積率を実現することができる。一方、コイル38の巻回数に合わせてスロット32を設定すれば、ステータ30の小型化を達成することができる。   Furthermore, the coil 38 wound around the teeth 34 can be wound around the intermediate portion 44 in a state before the teeth 34 are assembled to the yoke 36. In this case, the space of the slot 32 between the teeth 34 can be effectively used to realize a sufficient winding space factor. On the other hand, if the slot 32 is set in accordance with the number of turns of the coil 38, the stator 30 can be reduced in size.

なお、上述した実施形態では、インナーロータ型のステータ30について説明したが、ステータの外周部にロータが配設されるアウターロータ型のステータにも適用できることは勿論である。   In the above-described embodiment, the inner rotor type stator 30 has been described, but it is needless to say that the present invention can also be applied to an outer rotor type stator in which a rotor is disposed on the outer periphery of the stator.

本実施形態のステータの構成図である。It is a block diagram of the stator of this embodiment. 本実施形態のステータの一部平面図である。It is a partial top view of the stator of this embodiment. 本実施形態のステータを構成するティースにコイルを装着する処理の説明図である。It is explanatory drawing of the process which mounts a coil on the teeth which comprise the stator of this embodiment. 本実施形態のステータを構成するティース及びヨークの切り出し方法の説明図である。It is explanatory drawing of the cutting method of the teeth and yoke which comprise the stator of this embodiment. 従来技術に係るDCブラシレスモータの構成図である。It is a block diagram of the DC brushless motor which concerns on a prior art. 従来技術に係るステータの構成図である。It is a block diagram of the stator which concerns on a prior art.

符号の説明Explanation of symbols

30…ステータ 32…スロット
34…ティース 36…ヨーク
38…コイル 40…ボビン
42…鍔状部 44…中間部
46、52…接合部 48、54…係合部
50…磁気ギャップ 56…電磁鋼板
DESCRIPTION OF SYMBOLS 30 ... Stator 32 ... Slot 34 ... Teeth 36 ... Yoke 38 ... Coil 40 ... Bobbin 42 ... Gutter-like part 44 ... Intermediate | middle part 46, 52 ... Joint part 48, 54 ... Engagement part 50 ... Magnetic gap 56 ... Electrical steel plate

Claims (4)

コイルが巻回される複数のティースと、周方向に分割され、前記各ティースに連結して環状に配設されるヨークとから構成されるステータにおいて、
前記ティースは、前記コイルが巻回される部位から当該ステータの径方向に向かって二辺の間隔が徐々に幅狭となる直線状の接合部と、前記接合部の外径側の端部から当該ステータの周方向両側に突出する係合部とを備え、前記接合部に前記ヨークの端部が接合するとともに、前記係合部に前記ヨークの端部が係合し、
前記接合部は、一辺の長さが前記コイルが巻回される部位における前記ティースの幅と、前記ヨークの幅とのいずれか狭い幅の方に合わせた長さに設定されることを特徴とするステータ。
In a stator constituted by a plurality of teeth around which a coil is wound, and a yoke that is divided in the circumferential direction and connected to each of the teeth and arranged in an annular shape,
The teeth are formed from a linear joining portion in which the distance between two sides gradually narrows from a portion around which the coil is wound in the radial direction of the stator, and an end portion on the outer diameter side of the joining portion. and a engaging portion projecting in the circumferential direction on both sides of the stator, with an end portion of the yoke to the junction joining the end portion of the yoke is engaged with the engaging portion,
The joint is characterized in that the length of one side is set to a length that matches the narrower one of the width of the teeth and the width of the yoke at the part where the coil is wound. Stator.
請求項1記載のステータにおいて、
前記ティース及び前記ヨークは、前記係合部において溶接接合されることを特徴とするステータ。
The stator according to claim 1, wherein
The stator and the yoke are welded and joined at the engaging portion.
請求項1記載のステータにおいて、
前記接合部は、前記コイルが巻回される前記ティースの部位の延在方向と、前記ヨークの延在方向とを略二等分する方向に設定されることを特徴とするステータ。
The stator according to claim 1, wherein
The stator is characterized in that the joint is set in a direction that substantially bisects the extending direction of the tooth portion around which the coil is wound and the extending direction of the yoke.
請求項1記載のステータにおいて、
前記ティース及び前記ヨークは、それぞれの延在方向に電磁鋼板の磁化容易方向が設定されることを特徴とするステータ。
The stator according to claim 1, wherein
The stator and the yoke are characterized in that an easy direction of magnetization of the electromagnetic steel sheet is set in each extending direction.
JP2005144053A 2005-05-17 2005-05-17 Stator Expired - Fee Related JP4568639B2 (en)

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CN101483359B (en) * 2008-01-11 2012-08-22 德昌电机(深圳)有限公司 Motor stator construction and forming method thereof
JP2011015592A (en) * 2009-07-06 2011-01-20 Toyota Motor Corp Split stator and manufacturing method thereof
JP2012050200A (en) * 2010-08-25 2012-03-08 Toyota Motor Corp Split stator core, method of manufacturing the same, and motor including split stator core
JP6917853B2 (en) * 2017-09-29 2021-08-11 株式会社日立製作所 Radial gap type rotary electric machine, its manufacturing equipment and its manufacturing method
JP7262926B2 (en) * 2018-03-16 2023-04-24 株式会社日立製作所 Radial gap type rotary electric machine
JPWO2020054469A1 (en) * 2018-09-12 2021-08-30 パナソニックIpマネジメント株式会社 Stator and motor using it

Citations (3)

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JP2000156943A (en) * 1998-11-18 2000-06-06 Hitachi Ltd Stator of rotary electric machine
JP2001136687A (en) * 1999-11-09 2001-05-18 Hitachi Ltd Permanent magnet rotary electric machine
JP2004236495A (en) * 2003-01-10 2004-08-19 Nippon Steel Corp Exciter and synchronizer using it

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
JP2000156943A (en) * 1998-11-18 2000-06-06 Hitachi Ltd Stator of rotary electric machine
JP2001136687A (en) * 1999-11-09 2001-05-18 Hitachi Ltd Permanent magnet rotary electric machine
JP2004236495A (en) * 2003-01-10 2004-08-19 Nippon Steel Corp Exciter and synchronizer using it

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