JP2011182576A - Axial gap motor - Google Patents

Axial gap motor Download PDF

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JP2011182576A
JP2011182576A JP2010045492A JP2010045492A JP2011182576A JP 2011182576 A JP2011182576 A JP 2011182576A JP 2010045492 A JP2010045492 A JP 2010045492A JP 2010045492 A JP2010045492 A JP 2010045492A JP 2011182576 A JP2011182576 A JP 2011182576A
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stator
frame
axial gap
divided
motor
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Tsutomu Michioka
力 道岡
Tetsuya Ikutani
徹也 幾谷
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Daihatsu Motor Co Ltd
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Daihatsu Motor Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To hold the stator of an axial gap motor so that an induced current may not be generated by forming it with split cores. <P>SOLUTION: The stator 1 is made by arranging each split core 3 and 4 in a frame 7 annularly, keeping them at a spacing between spokes, and further cuts 10 and 12, which cut electric loops, are formed separately for each electric loop which surrounds at least a part of each of split cores 3 and 4 of the frame 7 so that any induced current may not flow to the surrounding parts of each split core 3 and 4 of the frame 7. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

この発明は、ロータとステータがモータ軸方向にギャップを設けて対向配置されたアキシャルギャップモータに関し、詳しくは、ステータの誘導電流対策に関する。   The present invention relates to an axial gap motor in which a rotor and a stator are arranged to face each other with a gap provided in the motor axial direction, and more particularly to countermeasures against induced current in the stator.

従来、アキシャルギャップモータは、ロータとステータがモータ軸方向にギャップを設けて対向配置した構成であり、ステータの各磁極のティースは圧粉磁心で形成することが提案されている（例えば特許文献１（段落［００１９］−［００２５］、図２等）参照）。   2. Description of the Related Art Conventionally, an axial gap motor has a configuration in which a rotor and a stator are arranged to face each other with a gap in the motor axial direction, and it has been proposed that teeth of each magnetic pole of the stator be formed of a dust core (for example, Patent Document 1). (See paragraphs [0019]-[0025], FIG. 2 etc.)).

図４は特許文献１の一実施形態のステータ１００を示し、ステータ１００は略円盤状のステータ本体１０７と、駆動用の複数の集中巻きの励磁コイル１０９と、コイル１０９と同数の固定子磁心（ステータ磁極）１１１とを備える。固定子磁心１１１は圧粉磁心により形成されている。ステータ本体１０７には、コイル１０９および固定子磁心１１１の挿入用の複数の挿入孔１１７ａが周方向に間隔をあけて設けられ、コイル１０９および固定子磁心１１１は、ステータ本体１０７の各挿入孔１０７ａにモータ軸方向から嵌め込んでステータ本体１０７に保持される。   FIG. 4 shows a stator 100 according to an embodiment of Patent Document 1. The stator 100 includes a substantially disc-shaped stator body 107, a plurality of concentrated winding exciting coils 109 for driving, and the same number of stator cores as the coils 109 ( Stator magnetic pole) 111. The stator core 111 is formed of a dust core. The stator body 107 is provided with a plurality of insertion holes 117 a for inserting the coil 109 and the stator core 111 at intervals in the circumferential direction, and the coil 109 and the stator core 111 are inserted into the insertion holes 107 a of the stator body 107. And is held by the stator main body 107 from the motor shaft direction.

また、この種のアキシャルギャップモータについては、本出願人の既出願により立体的な磁路構成にすることも提案されている（特願２００９−０１１５２３２号）。   As for this type of axial gap motor, a three-dimensional magnetic path configuration has been proposed by the applicant's already filed application (Japanese Patent Application No. 2009-0115232).

図５は前記既出願の３相駆動のアキシャルギャップモータ２００の概略の分解斜視図であり、アキシャルギャップモータ２００は、モータ軸（図示せず）に軸支されたモータ軸方向の２個のロータ２０３ａ、２０３ｂ間に表裏両面が磁極面の１個のステータ２０４を設け、さらに、モータ軸に装着した円筒状の磁路形成部材２０５をステータ２０４の中心孔に遊挿し、磁路形成部材２０５の両端面をロータ２０３ａ、２０３ｂの端面（磁極面）に当接して形成される。磁路形成部材２０５はロータ２０３ａ、２０３ｂ間の磁路を形成する。なお、図５の実線ｍはモータ軸を示し、破線矢印は磁束が通る磁路を示す。   FIG. 5 is a schematic exploded perspective view of the previously described three-phase drive axial gap motor 200. The axial gap motor 200 includes two rotors in the motor shaft direction that are supported by a motor shaft (not shown). One stator 204 having magnetic pole faces on both sides is provided between 203a and 203b, and a cylindrical magnetic path forming member 205 attached to the motor shaft is loosely inserted into the center hole of the stator 204, and the magnetic path forming member 205 Both end surfaces are formed in contact with the end surfaces (magnetic pole surfaces) of the rotors 203a and 203b. The magnetic path forming member 205 forms a magnetic path between the rotors 203a and 203b. Note that the solid line m in FIG. 5 indicates the motor shaft, and the broken line arrow indicates the magnetic path through which the magnetic flux passes.

そして、ロータ２０３ａ、２０３ｂは、ステータ２０４に対向する端面（磁極面）に例えば８個のロータ磁極２０６が周方向に等間隔に配設されている。ステータ４は、例えば、ロータ２０３ａに対向する一方の端面（磁極面）に全てＳ極に励磁されるＡ、Ｂ、Ｃの相順の１２個のステータ磁極２０７ａが周方向に等間隔に配設され、ロータ２０３ｂに対向する他方の端面（磁極面）に全てＮ極に励磁されるＡ、Ｂ、Ｃの相順の１２個のステータ磁極２０７ｂがステータ磁極２０７ａより周方向にずらして等間隔に配設されている。   In the rotors 203a and 203b, for example, eight rotor magnetic poles 206 are arranged at equal intervals in the circumferential direction on the end face (magnetic pole face) facing the stator 204. In the stator 4, for example, twelve stator magnetic poles 207 a in the phase order of A, B, and C, which are excited to the S poles, are arranged at equal intervals in the circumferential direction on one end face (magnetic pole face) facing the rotor 203 a. The 12 stator magnetic poles 207b having the phase sequence of A, B, and C that are all excited to the N pole on the other end face (magnetic pole face) facing the rotor 203b are shifted from the stator magnetic pole 207a in the circumferential direction at equal intervals. It is arranged.

そして、アキシャルギャップモータ２００は、３相駆動によってステータ２０４の各ステータ磁極２０７ａ、２０７ｂに集中巻きされた各相の励磁コイル（図示せず）がＡ、Ｂ、Ｃの相順に通電され、このとき、図５の破線矢印に示すように磁束がステータ２０４の軸方向および周方向に進む立体磁路が形成される。そして、例えばステータ２０４の裏面の励磁相のＮ極から出た磁束が上記立体磁路を通ることにより、ロータ２０３ｂ、磁路形成部材２０５、ロータ２０３ａを通ってステータ２０４の表面の励磁相のＳ極に入り、その磁気的な吸引によりロータ２０３ａ、２０３ｂが回転してアキシャルギャップモータ２００が駆動される。   In the axial gap motor 200, the excitation coils (not shown) concentratedly wound around the stator magnetic poles 207a and 207b of the stator 204 by three-phase driving are energized in the order of phases A, B, and C. 5, a solid magnetic path is formed in which the magnetic flux travels in the axial direction and the circumferential direction of the stator 204 as indicated by broken line arrows. For example, when the magnetic flux emitted from the N pole of the excitation phase on the back surface of the stator 204 passes through the three-dimensional magnetic path, the excitation phase S on the surface of the stator 204 passes through the rotor 203b, the magnetic path forming member 205, and the rotor 203a. The rotor 203a, 203b is rotated by the magnetic attraction and the axial gap motor 200 is driven.

ところで、ステータ１００、２０４のようなアキシャルギャップモータのステータについては、磁極毎の複数の分割コアを周方向に配設して形成することも提案されている（例えば、特許文献２参照）。   By the way, it has also been proposed that a stator of an axial gap motor such as the stators 100 and 204 is formed by arranging a plurality of divided cores for each magnetic pole in the circumferential direction (see, for example, Patent Document 2).

特開２００５−２３７０８６号公報Japanese Patent Laying-Open No. 2005-237086 特開平９−２３３７７３号公報Japanese Patent Laid-Open No. 9-233773

図４のステータ１００を備えたアキシャルギャップモータの場合、一般的なアキシャルギャップモータと同様、各固定子磁心１１１は周方向にＮ極、Ｓ極に交互に励磁され、Ｎ極の固定子磁心１１１の磁束がロータを通ってＳ極の固定子磁心１１１に進む。このとき各固定子磁心（ステータ磁極）１１１の挿入孔１１７ａを囲むような電気的なループ（閉ループ）が形成されていると、ステータ本体１０７をモータ軸方向に通る磁束が変動することによって前記ループを流れる誘導電流が発生し、この誘導電流によってアキシャルギャップモータは損失が生じてモータ効率が低下する。   In the case of the axial gap motor provided with the stator 100 of FIG. 4, each stator magnetic core 111 is alternately excited in the circumferential direction with N and S poles, as in a general axial gap motor. The magnetic flux passes through the rotor to the S-pole stator core 111. At this time, if an electric loop (closed loop) is formed so as to surround the insertion hole 117a of each stator magnetic core (stator magnetic pole) 111, the magnetic flux passing through the stator body 107 in the motor axial direction fluctuates, so that the loop An induced current flowing through the motor is generated, and this induced current causes a loss in the axial gap motor, resulting in a reduction in motor efficiency.

また、図５のアキシャルギャップモータ２００の場合、ステータ２０４のヨーク部が周方向に電気的なループを形成するならば、磁路形成部材２０５を通る磁束がステータ２０４をモータ軸方向に通り、この磁束の変動によってステータ２０４のヨーク内周部分に同様の誘導電流が発生し、この誘導電流によってアキシャルギャップモータ２００の損失が生じてモータ効率が低下する可能性がある。   In the case of the axial gap motor 200 of FIG. 5, if the yoke portion of the stator 204 forms an electrical loop in the circumferential direction, the magnetic flux passing through the magnetic path forming member 205 passes through the stator 204 in the motor axial direction. A similar induced current is generated in the inner peripheral portion of the yoke of the stator 204 due to the fluctuation of the magnetic flux, and this induced current may cause a loss of the axial gap motor 200 and reduce the motor efficiency.

さらに、ステータ１００、２０４を圧粉磁心で形成する場合、製造や組み付けの容易さを考慮すると、特許文献２等に記載のような分割コアを圧粉磁心で形成し、各分割コアを環状に配設してステータ１００、２０４を形成することが好ましいが、この場合には、圧粉磁心はそれ自体が電気抵抗が高いので電気的なループを構成しにくいが、モータ軸方向（アキシャル方向）に作用する吸収力に対して分割コアを保持するために、例えば分割コアを囲むように保持枠等を設けると、各分割コアをモータ軸方向に通る磁束の変動により、各分割コアの周囲の電気的なループに同様の誘導電流が発生する可能性がある。   Furthermore, when forming the stators 100 and 204 with dust cores, considering the ease of manufacture and assembly, split cores as described in Patent Document 2 are formed with dust cores, and each split core is annularly formed. It is preferable to form the stators 100 and 204, but in this case, the powder magnetic core itself has a high electric resistance, so that it is difficult to form an electric loop, but the motor axial direction (axial direction) In order to hold the split cores against the absorption force acting on, for example, if a holding frame is provided so as to surround the split cores, the fluctuations of the magnetic flux passing through each split core in the motor axial direction cause Similar induced currents may occur in the electrical loop.

本発明は、アキシャルギャップモータのステータを分割コアで形成して誘導電流が生じないように保持することを目的とする。   An object of the present invention is to form a stator of an axial gap motor with a split core so as to prevent induction current from being generated.

上記した目的を達成するために、本発明のアキシャルギャップモータは、ロータとステータがモータ軸方向にギャップを設けて対向配置されたアキシャルギャップモータであって、前記ステータは、周方向の所定間隔毎に径方向の支柱を設けた保持枠構造の導電性のフレームと、前記フレームに前記支柱の間隔で保持されて周方向に配設された複数の分割コアとを備え、前記フレームは、前記支柱を含み前記各分割コアそれぞれの少なくとも一部を囲む電気的なループ毎に、該ループを切断する切欠部が形成されていることを特徴としている（請求項１）。   In order to achieve the above-described object, an axial gap motor of the present invention is an axial gap motor in which a rotor and a stator are arranged to face each other with a gap provided in the motor axial direction, and the stator is arranged at predetermined intervals in the circumferential direction. A conductive frame having a holding frame structure provided with radial struts, and a plurality of divided cores held in the frame at intervals of the struts and disposed in the circumferential direction, the frame including the struts A notch for cutting the loop is formed for each electrical loop including at least a part of each of the divided cores (Claim 1).

また、本発明のアキシャルギャップモータは、前記切欠部が、前記フレームのモータ軸側の内径側部分に形成されることを特徴としている（請求項２）。   The axial gap motor according to the present invention is characterized in that the notch is formed in an inner diameter side portion of the frame on the motor shaft side.

請求項１の発明の場合、フレームに圧粉磁心等で形成された各分割コアが支柱の間隔で保持されて環状に配設されることにより、アキシャルギャップモータのステータが分割コアで形成される。さらに、フレームの各分割コアそれぞれの少なくとも一部を囲む電気的なループ毎にその電気的なループを切断する切欠部が形成されるので、各分割コアをモータ軸方向に通る磁束が変動しても、フレームの各分割コアの周囲部分には誘導電流は流れない。そのため、誘導電流によるモータ効率の低下がない高性能なアキシャルギャップモータを提供できる。   In the case of the first aspect of the invention, the stator of the axial gap motor is formed of the split cores by holding the split cores formed of powder magnetic cores or the like in the frame at intervals of the support columns and being annularly arranged. . Furthermore, since a notch for cutting the electrical loop is formed for each electrical loop that surrounds at least a part of each divided core of the frame, the magnetic flux passing through each divided core in the motor axial direction varies. However, no induced current flows in the peripheral part of each divided core of the frame. Therefore, it is possible to provide a high-performance axial gap motor in which the motor efficiency is not reduced by the induced current.

請求項２の発明の場合、切欠部がフレームのモータ軸側の内径側部分に形成されるので、切欠部によるフレームの強度低下を少なくすることができる。しかも、とくにステータの表裏のいずれか一方の面の磁極を全てＳ極、他方の面の全ての磁極をＮ極とする立体的な磁路構成のアキシャルギャップモータの場合に、ロータ間の磁路を形成する磁路形成部材を一方向に通ってロータからステータに向かう磁束の変動による各分割コアの周囲部分の誘導電流の発生が、とくに磁束の影響が大きいステータの内径側でのループ切断によって確実に阻止される。また、ステータは、熱伝導率を良くするため、通常は外周部（外径側）をケースに密着させて保持されるので、フレームに切欠部を設けてもケースへの接触面を通して導通してしまい切欠部の効果が損なわれるという事態を防止できる。   In the case of the invention of claim 2, since the notch is formed in the inner diameter side portion of the frame on the motor shaft side, it is possible to reduce the strength reduction of the frame due to the notch. In addition, in the case of an axial gap motor having a three-dimensional magnetic path configuration in which all the magnetic poles on one of the front and back surfaces of the stator are all S poles and all the magnetic poles on the other side are N poles, the magnetic path between the rotors Generation of induced current in the peripheral part of each divided core due to fluctuation of magnetic flux from the rotor to the stator through the magnetic path forming member that forms the magnetic field, especially by loop cutting on the inner diameter side of the stator where the influence of magnetic flux is large Definitely blocked. In addition, the stator is usually held with its outer periphery (outer diameter side) in close contact with the case in order to improve the thermal conductivity. Therefore, even if a cutout is provided in the frame, it is conducted through the contact surface to the case. It is possible to prevent a situation where the effect of the cut-out portion is impaired.

本発明の一実施形態のステータの分解状態の斜視図である。It is a perspective view of the disassembled state of the stator of one Embodiment of this invention. 図１のフレーム本体の一部の拡大した正面図である。FIG. 2 is an enlarged front view of a part of the frame body of FIG. 1. 図１のステータの組み付けた状態の一部の拡大した正面図である。FIG. 2 is an enlarged front view of a part of the state where the stator of FIG. 1 is assembled. 従来例のステータの正面図である。It is a front view of the stator of a prior art example. 既出願のアキシャルギャップモータの部分断面図である。It is a fragmentary sectional view of the axial gap motor of an application.

つぎに、本発明をより詳細に説明するため、図５のアキシャルギャップモータ２００と同様の立体的な磁路構成のアキシャルギャップモータに適用した本発明の一実施形態について、図１、図２、図５を参照して詳述する。   Next, in order to describe the present invention in more detail, one embodiment of the present invention applied to an axial gap motor having a three-dimensional magnetic path configuration similar to the axial gap motor 200 of FIG. This will be described in detail with reference to FIG.

まず、本実施形態の立体的な磁路構成のアキシャルギャップモータは図５のアキシャルギャップモータ２００と同様、モータ軸（図示せず）に２個のロータ(図示せず）が軸支され、両ロータ間に、裏表両面にステータ磁極を配設したステータ１が設けられ、ロータとステータ１がモータ軸方向にギャップを設けて対向配置される。   First, in the axial gap motor having a three-dimensional magnetic path configuration according to the present embodiment, two rotors (not shown) are pivotally supported on a motor shaft (not shown) like the axial gap motor 200 of FIG. A stator 1 having stator magnetic poles disposed on both sides is provided between the rotors, and the rotor and the stator 1 are disposed to face each other with a gap in the motor axial direction.

図１はステータ１を、紙面右側から順に、フレーム本体２、環状に並べたＮ極側の複数（１２個）の分割コア３、環状に並べたＳ極側の複数（１２個）の分割コア４、外側の押さえ用の固定リング５、内側の環状に配設される複数の分割押さえ部材６に分解して示し、フレーム本体２および固定リング５、各分割押さえ部材６により本発明のフレーム７が形成される。   FIG. 1 shows, in order from the right side of the page, a frame body 2, a plurality of (12) split cores 3 on the N pole side arranged in a ring, and a plurality (12) split cores on the S pole side arranged in a ring. 4, a fixing ring 5 for pressing the outer side, and a plurality of divided pressing members 6 arranged in an annular shape on the inner side. The frame body 2 and the fixing ring 5 and the divided pressing members 6 make the frame 7 of the present invention. Is formed.

そして、フレーム本体２は、ステンレス等の非磁性体の導電材で形成され、同心状の外枠部２１、内枠部２２と、両枠部２１、２２間の窓枠部２３とを備える。窓枠部２３は、周方向に等間隔に放射状に形成された径方向の複数（１２個）の支柱２４を備える。支柱２４は左右側がテーパー状に形成され、各支柱２４間の開口２５の周縁もテーパー状である。なお、内枠部２２の構成については後述する。   The frame body 2 is formed of a non-magnetic conductive material such as stainless steel, and includes a concentric outer frame portion 21, an inner frame portion 22, and a window frame portion 23 between both the frame portions 21 and 22. The window frame portion 23 includes a plurality (12 pieces) of struts 24 in the radial direction formed radially at equal intervals in the circumferential direction. The support columns 24 are tapered on the left and right sides, and the periphery of the opening 25 between the support columns 24 is also tapered. The configuration of the inner frame portion 22 will be described later.

Ｎ極側の各分割コア３は、それぞれ平面視が径方向に長い台形の薄板状であり、各開口２５に嵌め込まれる表面３ａ側に、一回り小さな直方体状のＮ極のステータ磁極の突極（ティース）３１が形成されている。なお、各分割コア３はステータ磁極３１とともに圧粉磁心を圧縮して形成される。   Each of the split cores 3 on the N pole side has a trapezoidal thin plate shape that is long in the radial direction in a plan view, and is a salient pole of an N pole stator pole having a rectangular parallelepiped shape on the surface 3a side that is fitted into each opening 25. (Teeth) 31 is formed. Each divided core 3 is formed by compressing the dust core together with the stator magnetic pole 31.

そして、フレーム本体２に各分割コア３を組み付ける際には、各分割コア３が表面３ａ側から各開口２５に嵌め込まれる。このとき、Ｎ極の各ステータ磁極３１は各開口２５から外側に突出し、各分割コア３はステータ磁極３１の周囲が各支柱２４の左右縁を含む窓枠部２３の開口縁に当接した状態で各支柱２４間に保持される。この場合、各支柱２４によっても各分割コア３の受け面が形成され、ステータ１の剛性を高くできる。   When each divided core 3 is assembled to the frame body 2, each divided core 3 is fitted into each opening 25 from the surface 3 a side. At this time, each N-pole stator magnetic pole 31 protrudes outward from each opening 25, and each divided core 3 is in a state where the periphery of the stator magnetic pole 31 is in contact with the opening edge of the window frame portion 23 including the left and right edges of each column 24. Is held between the columns 24. In this case, the receiving surfaces of the divided cores 3 are also formed by the columns 24, and the rigidity of the stator 1 can be increased.

Ｓ極側の各分割コア４は、各分割コア３と同じ形状であり、表面４ａ側にステータ磁極３１と同様のＮ極のステータ磁極の突極（ティース）４１が形成されている。なお、各分割コア４もステータ磁極４１とともに圧粉磁心を圧縮して形成される。   Each split core 4 on the S pole side has the same shape as each split core 3, and a salient pole (tooth) 41 of an N pole stator pole similar to the stator pole 31 is formed on the surface 4 a side. Each divided core 4 is also formed by compressing the dust core together with the stator magnetic pole 41.

各分割コア３、４は、それぞれの裏面３ｂ、４ｂの左右の外周寄りの同じ半径上の位置に、凹凸８が周方向（左右方向）に一列に形成される。   In each of the split cores 3 and 4, unevenness 8 is formed in a row in the circumferential direction (left and right direction) at the same radial position near the left and right outer peripheries of the back surfaces 3 b and 4 b.

そして、Ｎ極側の各分割コア４は、径方向に半分（１／２ピッチ）ずれて各２個の分割コア３に跨るように、各分割コア３に背中合わせの状態に重ねられる。このとき、隣り合う各２個の分割コア３の左右いずれかの凹凸８に各分割コア４の左右の凹凸８が嵌まり合い、各分割コア４は容易に位置決めされてＳ極の各ステータ磁極４１が外側に突出した状態で環状に配設される。このように構成することによって、モータ軸から見たステータ１の磁極数が倍の２４極になる。また、各分割コア４は裏面の中央部が支柱２４に当接して支えられ、各分割コア３と同様に、支柱２４の間隔で環状に配設される。   Then, the divided cores 4 on the N pole side are overlapped with each divided core 3 in a back-to-back state so as to be shifted by half (1/2 pitch) in the radial direction and straddle the two divided cores 3. At this time, the left and right unevenness 8 of each divided core 4 is fitted to the left and right unevenness 8 of each of the two adjacent divided cores 3 so that each divided core 4 can be easily positioned and each stator pole of S pole. 41 is annularly arranged in a state of protruding outward. With this configuration, the number of magnetic poles of the stator 1 viewed from the motor shaft is doubled to 24. In addition, each divided core 4 is supported by a central portion of the back surface being in contact with the support 24, and similarly to each divided core 3, the divided cores 4 are annularly arranged at intervals of the support 24.

なお、各分割コア３、４のステータ磁極３１、４１には、それぞれ励磁コイルが集中巻きされる。   Note that exciting coils are concentratedly wound around the stator magnetic poles 31 and 41 of the divided cores 3 and 4, respectively.

外側の固定リング５は断面が逆Ｌ字状の非磁性体（ステンレス等の導電材）のつば付リング体であり、フレーム本体２の外枠部２１内側に各分割コア４をフレーム本体２側に押し付けるように圧入され、各分割コア３、４の外径側をフレーム本体２に係止する。このとき、各分割コア３、４の圧粉磁心は硬くて脆いが圧縮に対する強度が高いため、固定リング５により、各分割コア３、４の外周に沿った長い範囲を固定リング５で押さえて確実に固定できる。なお、固定リング５を押し付けて複数の分割コア３、４をまとめて固定できるので、分割コア３、４を個別にボルト締結等で固定する場合に比して組み付け作業性が向上する利点もある。   The outer fixing ring 5 is a flanged ring body of a non-magnetic material (conductive material such as stainless steel) having an inverted L-shaped cross section, and the divided cores 4 are arranged on the frame body 2 side inside the outer frame portion 21 of the frame body 2. The outer peripheral side of each of the split cores 3 and 4 is locked to the frame main body 2. At this time, the dust cores of the divided cores 3 and 4 are hard and fragile but have high strength against compression. Therefore, the fixing ring 5 holds the long range along the outer periphery of the divided cores 3 and 4 with the fixing ring 5. Can be fixed securely. Since the plurality of split cores 3 and 4 can be fixed together by pressing the fixing ring 5, there is also an advantage that the assembly workability is improved as compared with the case where the split cores 3 and 4 are individually fixed by bolt fastening or the like. .

つぎに、フレーム本体２の内枠部２２および各分割押さえ部材６について説明する。   Next, the inner frame portion 22 and each divided pressing member 6 of the frame body 2 will be described.

各分割コア３、４の内径側を押し付けてフレーム本体２に係止するだけであれば、内枠部２２は外枠部２１と同様に連続的な環状に形成し、各分割押さえ部材６の代わりに固定リング５と同様の連続的な環状の固定リングを用いれば十分であり、このとき、ステータ１は図５のステータ２０４に相当する構造になる。   If only the inner diameter side of each divided core 3, 4 is pressed and locked to the frame body 2, the inner frame portion 22 is formed in a continuous annular shape like the outer frame portion 21. Instead, it is sufficient to use a continuous annular fixing ring similar to the fixing ring 5. At this time, the stator 1 has a structure corresponding to the stator 204 of FIG. 5.

しかし、そのように形成すると、各分割コア３は、それぞれフレーム本体２の外枠部２１、内枠部２２、支柱２４を含む電気的な導体ループで囲まれ、また、各分割コア４は、隣り合う各２個の分割コア４の半分ずつが、固定リング５、各分割押さえ部材６に代わる固定リング、支柱２４の電気的な導体ループで囲まれた状態になる。すなわち、フレーム７に相当するフレームには支柱２４を含み各分割コア３、４それぞれの少なくとも一部を囲む電気的なループが形成される。このような構成のフレームに保持されたステータを図５のステータ２０４の代わりに用いてアキシャルギャップモータを形成すると、図５の磁路形成部材２０５を一方向に通る同図の破線矢印の磁束が各分割コア３、４を通り、その磁束の変動（脈動変化）によって各分割コア３、４の周囲部分に誘導電流が流れる。   However, when formed in such a manner, each divided core 3 is surrounded by an electric conductor loop including the outer frame portion 21, the inner frame portion 22, and the support column 24 of the frame body 2, and each divided core 4 is Half of each of the two adjacent divided cores 4 is surrounded by the fixing ring 5, the fixing ring replacing each of the divided pressing members 6, and the electric conductor loop of the support column 24. That is, the frame corresponding to the frame 7 is formed with an electric loop including the support 24 and surrounding at least a part of each of the divided cores 3 and 4. When an axial gap motor is formed by using the stator held in the frame having such a configuration instead of the stator 204 in FIG. 5, the magnetic flux indicated by the broken line arrow in FIG. 5 passes through the magnetic path forming member 205 in FIG. 5 in one direction. An induction current flows through the divided cores 3 and 4 and flows around the divided cores 3 and 4 due to the fluctuation (pulsation change) of the magnetic flux.

そこで、本実施形態の場合、フレーム本体２の内枠部２２は連続的な環状ではなく、略各分割コア４毎の複数の弧片状の分割部９が断続した環状構成であり、各分割分９の隙間が窓枠部２３の内径側部分の切り欠きとともに、本発明の切欠部１０を形成する。なお、内枠部２２の各分割部分９もフレーム本体２、固定リング５と同様の非磁性体の導電材で形成される。   Therefore, in the case of the present embodiment, the inner frame portion 22 of the frame body 2 is not a continuous annular shape, but has an annular configuration in which a plurality of arc-piece-shaped divided portions 9 for each divided core 4 are intermittently provided. The gap of the minute 9 forms the cutout portion 10 of the present invention together with the cutout of the inner diameter side portion of the window frame portion 23. Each divided portion 9 of the inner frame portion 22 is also formed of a nonmagnetic conductive material similar to the frame main body 2 and the fixing ring 5.

図２はフレーム本体２の一部を拡大して示し、切欠部１０によってフレーム本体２は各開口２５の内径側中央にスリット状の切欠部１０が形成され、切欠部１０で区切られた各分割部９はそれぞれの表面側に各分割押さえ部材６のメス側の係止部１１が形成されている。   FIG. 2 is an enlarged view of a part of the frame body 2, and the frame body 2 is formed with a slit-shaped notch 10 at the center of the inner diameter side of each opening 25 by the notch 10. The part 9 is formed with a locking part 11 on the female side of each divided pressing member 6 on each surface side.

一方、各分割押さえ部材６は、分割部９と同じ材質の弧片体で形成され、裏面側に例えば係止部１１に圧入されるオス側の係止突起（図示せず）が形成されている。   On the other hand, each divided pressing member 6 is formed of an arc piece made of the same material as that of the divided portion 9, and a male-side locking projection (not shown) to be press-fitted into the locking portion 11 is formed on the back surface side. Yes.

そして、各分割押さえ部材６は、環状に並べられた各分割コア４の内径側にフレーム本体２の各分割部９に重なるように環状に配設されてフレーム本体２側に押し付けられることにより、フレーム本体２の各分割部９に接着し、各分割コア４の内径側を個別にフレーム本体２に押し付けて、各分割コア３、４の内径側をフレーム本体２に係止する。   And each division | segmentation pressing member 6 is annularly arrange | positioned so that it may overlap with each division part 9 of the flame | frame main body 2 on the internal diameter side of each division | segmentation core 4 arranged in cyclic | annular form, and is pressed by the flame | frame main body 2 side, It adheres to each divided portion 9 of the frame main body 2, and the inner diameter side of each divided core 4 is individually pressed against the frame main body 2, and the inner diameter side of each divided core 3, 4 is locked to the frame main body 2.

図３は各分割押さえ部材６がフレーム本体２の各分割部９に接着した状態のステータ１の一部を拡大して示し、各分割押さえ部材６の隙間により、分割コア４側にも切欠部１０に重なるように切欠部１２が形成される。   FIG. 3 is an enlarged view of a part of the stator 1 in a state where each divided pressing member 6 is bonded to each divided portion 9 of the frame body 2, and a cutout portion is also formed on the divided core 4 side by a gap between each divided pressing member 6. A notch 12 is formed so as to overlap with 10.

このようにして形成されたステータ１は、圧粉磁心の各分割コア３、４を背中合わせに環状に配置して形成され、立体磁路構成のアキシャルギャップモータのステータに好適である。   The stator 1 thus formed is formed by arranging the divided cores 3 and 4 of the powder magnetic core in an annular shape back to back, and is suitable for a stator of an axial gap motor having a three-dimensional magnetic path configuration.

さらに、ステータ１の場合、裏面の各分割コア３については、各分割コア３に接触する略フレーム本体２の外径部２１、内径部２２、支柱２４により各分割コア３を個別に囲む電気的なループが形成されるが、これらのループはその一部が各切欠部１０により電気的に切断される。また、表面の各分割コア４については、各分割コア４に接触する略固定リング５、各分割押さえ部材６、支柱２４によりにより隣り合う２個の分割コア４の半分ずつを囲む電気的なループが形成されるが、これらのループはその一部が各切欠部１２により電気的に切断される。   Further, in the case of the stator 1, each of the split cores 3 on the back surface is electrically surrounded by each of the split cores 3 by the outer diameter portion 21, the inner diameter portion 22, and the support column 24 of the frame body 2 that is in contact with each split core 3. These loops are electrically cut at each notch 10. In addition, for each of the divided cores 4 on the surface, an electric loop that surrounds each half of the two adjacent divided cores 4 by a substantially fixing ring 5 that contacts each divided core 4, each divided pressing member 6, and a column 24. However, a part of these loops is electrically cut by the notches 12.

そのため、例えば図５のステータ２０４の代わりにステータ１を設けて形成される立体磁路構成のアキシャルギャップモータは、ロータ２０３ａ、２０３ｂ間の磁路を形成する磁路形成部材２０５を一方向に通り、さらに、ロータ２０３ａ、２０３ｂ間のステータ１をモータ軸方向に通過する磁束が脈動変化しても、ステータ１は、切欠部１０、１２によって各分割コア３、４の周囲の電気的なループがいずれも切断され、誘導電流の発生が切欠部１０、１１によって確実に阻止され、フレーム７の各分割コア３、４の周囲部分には誘導電流は流れない。   Therefore, for example, an axial gap motor having a three-dimensional magnetic path configuration formed by providing the stator 1 instead of the stator 204 of FIG. 5 passes the magnetic path forming member 205 that forms a magnetic path between the rotors 203a and 203b in one direction. Furthermore, even if the magnetic flux passing through the stator 1 between the rotors 203a and 203b in the motor axial direction changes pulsatingly, the stator 1 has an electrical loop around the split cores 3 and 4 due to the notches 10 and 12. In both cases, the generation of the induced current is reliably prevented by the notches 10 and 11, and the induced current does not flow around the divided cores 3 and 4 of the frame 7.

したがって、誘導電流によるモータ効率の低下がない高性能な立体磁路構成のアキシャルギャップモータを提供できる。しかも、切欠部１０、１２をフレーム７の内径側に形成するので、切欠部１０、１２によるフレーム７の強度低下は少ない。   Therefore, it is possible to provide an axial gap motor having a high-performance three-dimensional magnetic path configuration in which motor efficiency is not reduced by induced current. In addition, since the notches 10 and 12 are formed on the inner diameter side of the frame 7, the strength of the frame 7 is not reduced significantly by the notches 10 and 12.

また、ステータ１は固定ボルト等の出っ張りがなく、その分ステータ１の外径を小さくできる。しかも、固定リング５の圧入等で各分割コア３、４をフレーム７に保持するので、部品数が少なく、ステータ１を軽量、安価に形成できる。   Further, the stator 1 has no protrusion such as a fixing bolt, and the outer diameter of the stator 1 can be reduced accordingly. In addition, since the divided cores 3 and 4 are held on the frame 7 by press-fitting the fixing ring 5 or the like, the number of components is small, and the stator 1 can be formed at a light weight and at low cost.

以上説明したように、本実施形態の場合、圧粉磁心の各分割コア３、４を確実にフレーム７に保持し、分割コア３、４を用いた軽量・小型で組み付けが容易であって誘導電流が流れない両面磁極面構成のステータ１を構成することができ、ステータ１を用いて誘導電流によるモータ効率の低下がない高性能な立体磁路構成のアキシャルギャップモータを提供できる。   As described above, in the case of the present embodiment, each of the divided cores 3 and 4 of the dust core is securely held on the frame 7 and is light and small in size and easy to assemble using the divided cores 3 and 4. A stator 1 having a double-sided magnetic pole surface configuration in which no current flows can be configured, and an axial gap motor having a high-performance three-dimensional magnetic path configuration in which the motor efficiency does not decrease due to an induced current can be provided.

また、切欠部１０、１２をフレーム７の内径側に形成することにより、切欠部１０、１２によるフレーム７の強度低下を防止することができる利点もある。   In addition, by forming the notches 10 and 12 on the inner diameter side of the frame 7, there is also an advantage that a decrease in strength of the frame 7 due to the notches 10 and 12 can be prevented.

そして、本発明は上記した実施形態に限定されるものではなく、その趣旨を逸脱しない限りにおいて上述したもの以外に種々の変更を行なうことが可能であり、例えば、ステータ１は分割コア３のみを有する片面磁極構成であってもよい。   The present invention is not limited to the above-described embodiment, and various modifications other than those described above can be made without departing from the spirit thereof. For example, the stator 1 includes only the split core 3. It may have a single-sided magnetic pole configuration.

切欠部１０、１２は各電気的なループの適当な一部を電気的に切断するものであればよく、それらの形成位置はフレーム７の内径側部分に限るものではなく、ループ毎に複数形成してもよい。また、切欠部１０、１２は樹脂等の絶縁材が充填等されていてもよい。   The notches 10 and 12 may be any one that electrically cuts an appropriate part of each electrical loop, and the formation position thereof is not limited to the inner diameter side portion of the frame 7, and a plurality of notches are formed for each loop. May be. The notches 10 and 12 may be filled with an insulating material such as resin.

各分割押さえ部材６と係止部１１とは割りピン等のピンやボルトで接合するようにしてもよい。   Each divided pressing member 6 and the locking portion 11 may be joined by a pin such as a split pin or a bolt.

各分割コア３、４は圧粉磁心で形成されていなくてもよく、適当な磁性材で形成されていればよい。   Each of the divided cores 3 and 4 may not be formed of a dust core and may be formed of an appropriate magnetic material.

そして、本発明は、立体磁路構成のアキシャルギャップモータのステータだけでなく、種々のアキシャルギャップモータのステータに適用できるのは勿論であり、その際、ステータやロータの磁極数や駆動相数等はどのようであってもよい。   The present invention can be applied not only to a stator of an axial gap motor having a three-dimensional magnetic path configuration, but also to a stator of various axial gap motors. May be anything.

１ ステータ
３、４ 分割コア
７ フレーム
２４ 支柱
１０、１２ 切欠部 1 Stator 3, 4 Divided Core 7 Frame 24 Post 10, 12 Notch

Claims (2)

ロータとステータがモータ軸方向にギャップを設けて対向配置されたアキシャルギャップモータであって、
前記ステータは、
周方向の所定間隔毎に径方向の支柱を設けた保持枠構造の導電性のフレームと、
前記フレームに前記支柱の間隔で保持されて周方向に配設された複数の分割コアとを備え、
前記フレームは、
前記支柱を含み前記各分割コアそれぞれの少なくとも一部を囲む電気的なループ毎に、該ループを切断する切欠部が形成されていることを特徴とするアキシャルギャップモータ。 An axial gap motor in which a rotor and a stator are arranged to face each other with a gap in the motor axial direction,
The stator is
A conductive frame having a holding frame structure provided with radial struts at predetermined intervals in the circumferential direction;
A plurality of split cores held in the frame at intervals of the support columns and disposed in the circumferential direction;
The frame is
An axial gap motor, wherein a notch for cutting the loop is formed for each electrical loop that includes the support column and surrounds at least a part of each of the divided cores. 請求項１に記載のアキシャルギャップモータにおいて、
前記切欠部は、前記フレームのモータ軸側の内径側部分に形成されることを特徴とするアキシャルギャップモータ。 The axial gap motor according to claim 1,
The axial gap motor according to claim 1, wherein the notch is formed in an inner diameter side portion of the frame on the motor shaft side.
JP2010045492A 2010-03-02 2010-03-02 Axial gap motor Pending JP2011182576A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101842827B1 (en) * 2017-02-07 2018-03-28 경성대학교 산학협력단 Double Stator Axial Field Type Switched Reluctance Motor
JP2019129636A (en) * 2018-01-25 2019-08-01 公益財団法人鉄道総合技術研究所 Stator, rotating electric machine, and vehicle
US11404942B2 (en) 2018-08-16 2022-08-02 Otis Elevator Company Stator assembly of a motor, a synchronous motor and a passenger conveying device
KR20230007654A (en) * 2021-07-06 2023-01-13 주식회사 지앤씨에너지 Stator unit and generator having the same
WO2024012848A1 (en) * 2022-07-12 2024-01-18 Bayerische Motoren Werke Aktiengesellschaft Stator for an electric axial flux machine, method for producing such a stator, and electric axial flux machine having such a stator

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003047070A1 (en) * 2001-11-29 2003-06-05 Yamaha Hatsudoki Kabushiki Kaisha Axial gap type dynamo-electric machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003047070A1 (en) * 2001-11-29 2003-06-05 Yamaha Hatsudoki Kabushiki Kaisha Axial gap type dynamo-electric machine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101842827B1 (en) * 2017-02-07 2018-03-28 경성대학교 산학협력단 Double Stator Axial Field Type Switched Reluctance Motor
JP2019129636A (en) * 2018-01-25 2019-08-01 公益財団法人鉄道総合技術研究所 Stator, rotating electric machine, and vehicle
US11404942B2 (en) 2018-08-16 2022-08-02 Otis Elevator Company Stator assembly of a motor, a synchronous motor and a passenger conveying device
KR20230007654A (en) * 2021-07-06 2023-01-13 주식회사 지앤씨에너지 Stator unit and generator having the same
KR102623855B1 (en) * 2021-07-06 2024-01-11 주식회사 지앤씨에너지 Stator unit and generator having the same
WO2024012848A1 (en) * 2022-07-12 2024-01-18 Bayerische Motoren Werke Aktiengesellschaft Stator for an electric axial flux machine, method for producing such a stator, and electric axial flux machine having such a stator

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