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WO2015075784A1 - Machine electrique tournante a entrefer axial - Google Patents

Machine electrique tournante a entrefer axial Download PDF

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Publication number
WO2015075784A1
WO2015075784A1 PCT/JP2013/081225 JP2013081225W WO2015075784A1 WO 2015075784 A1 WO2015075784 A1 WO 2015075784A1 JP 2013081225 W JP2013081225 W JP 2013081225W WO 2015075784 A1 WO2015075784 A1 WO 2015075784A1
Authority
WO
WIPO (PCT)
Prior art keywords
winding
stator
rotor
holding member
axial gap
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.)
Ceased
Application number
PCT/JP2013/081225
Other languages
English (en)
Japanese (ja)
Inventor
見多 出口
明仁 中原
聡 菊地
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2015548910A priority Critical patent/JPWO2015075784A1/ja
Priority to PCT/JP2013/081225 priority patent/WO2015075784A1/fr
Publication of WO2015075784A1 publication Critical patent/WO2015075784A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/182—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to stators axially facing the rotor, i.e. with axial or conical air gap
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos

Definitions

  • the present invention relates to an axial gap type rotating electrical machine, and more particularly to a 2-rotor-1 stator type axial gap rotating electrical machine.
  • An axial gap type rotating electrical machine has a structure in which a pair of disk-shaped rotors are arranged to face each other in the direction of the rotation axis, and a stator is sandwiched between the pair of rotors via a predetermined gap.
  • the stator includes a plurality of cores arranged in the circumferential direction and windings wound around the cores.
  • Patent Document 1 a technique of integrally molding a core and a housing using a synthetic resin has been proposed (for example, Patent Document 1).
  • Patent Document 2 a method of holding the core to the housing using a stator bracket has been proposed (for example, Patent Document 2).
  • Patent Document 1 since the technique described in Patent Document 1 holds the core only by the adhesive force between the resin and the housing, the resin deteriorates due to the temperature rise or vibration of the stator, and the adhesive strength decreases. There is a problem that decreases. In addition, since the heat of the winding is transferred to the refrigerant through the resin having low thermal conductivity, there is a problem that it is disadvantageous in terms of cooling efficiency.
  • Patent Document 2 has a problem in that it is disadvantageous in terms of cooling efficiency because the heat of the winding is transferred to the refrigerant through the core and the stator bracket which are laminated bodies.
  • the present invention has been made in view of the above, and it is an object of the present invention to provide an axial gap type rotating electrical machine capable of improving the cooling efficiency of a winding while maintaining a core with high strength.
  • a stator a stator, a first rotor, a second rotor disposed so as to face the first rotor with the stator interposed therebetween, and the fixed
  • a stator that houses the first rotor and the second rotor, wherein the stator includes a plurality of stator cores, a holding member that holds the plurality of stator cores, and the stator.
  • the holding member is fixed to the housing so that a part of the holding member and the inner wall of the housing form a flow passage space through which the refrigerant flows. And the holding member is Serial toward the center of the stator so as to be disposed in a space between the first winding and the second winding, characterized in that is extended.
  • the present invention can provide an axial gap type rotating electrical machine capable of improving the cooling efficiency of the winding while maintaining the core with high strength.
  • FIG. 1 is an exploded perspective view of a 2-rotor-1 stator type axial gap type rotating electrical machine 100.
  • FIG. FIG. 2 is a partial cross-sectional view of an axial gap type rotating electrical machine 100 cut along a plane A in FIG. 1.
  • 4 is a perspective view illustrating a fixing method for fixing the core 21 to the holding member 30.
  • FIG. 3 is a perspective view of a state in which a core 21 is fixed to a holding member 30.
  • FIG. It is a perspective view explaining the fixing method which concerns on the other Example which fixes the core 21 to the holding member 30.
  • FIG. It is a perspective view showing composition of coils 22u, 22v, and 22w of each energized phase, and cores 21u, 21v, and 21w. It is sectional drawing which shows the structure of a coil
  • FIG. 1 is an exploded perspective view of a 2-rotor-1 stator type axial gap type rotating electrical machine 100.
  • FIG. 2 is a partial cross-sectional view of the axial gap type rotating electrical machine 100 cut along the plane A in FIG. ⁇ Structure of axial gap type rotating electrical machine>
  • the axial gap type rotating electric machine 100 includes a pair of disk-shaped rotors 10a and 10b in the direction of the rotation axis 60, and a stator 20 disposed between the pair of rotors 10a and 10b via a predetermined gap G. ,have.
  • the rotor 10 includes a first rotor 10a and a second rotor 10b disposed so as to face the first rotor 10a.
  • the rotor 10a includes a magnet 11a and a structural material 12a.
  • a plurality of magnets 11a are arranged in the circumferential direction around the rotating shaft 60, but a single circular ring-shaped magnet may be arranged.
  • the material is not limited, and for example, it is composed of a rare earth magnet using a rare earth such as neodymium or a ferrite magnet.
  • the structural material 12a is provided with a recess on the side facing the stator 20, and holds the magnet 11a.
  • the magnet 11a is held in the recess of the structural material 12a by, for example, adhesion.
  • the rotor 10b has basically the same configuration as the rotor 10a, although the direction in which the magnet 11a is arranged is different from that of the rotor 10a.
  • the rotors 10a and 10b in this embodiment are not limited to the structure shown in FIG. 1 and FIG. 1, and a specific shape may be arbitrary.
  • a switched reluctance type rotating electrical machine (SR motor) provided with a rotor core having salient poles may be employed.
  • the stator 20 includes a plurality of stator cores 21 arranged in the circumferential direction, a winding 22 wound around each core, and a holding member 30 that holds the stator core 21.
  • the core 21 is composed of a laminated body of magnetic thin plates such as electromagnetic steel plates and amorphous foil strips in order to suppress the generation of eddy currents.
  • the magnetic thin plates of the core 21 are insulated by an insulating layer.
  • the winding 22 has a distributed winding structure wound over a plurality of stator cores 21.
  • the holding member 30 has an outer peripheral side of the holding member 30 fixed to the inner wall of the housing 40.
  • the holding member 30 and the housing 40 are fixed by, for example, shrink fitting or press fitting.
  • the housing 40 supports the holding member 30 by contacting the outer peripheral side of the holding member 30 and the inner wall of the housing 40.
  • the rotary shaft 60 is fixed to the housing 40 via a bearing 50.
  • a groove 31 is provided on the outer peripheral side of the holding member 30 along the circumferential direction.
  • the groove 31 forms a refrigerant path 32 for allowing the refrigerant to flow between the groove 31 and the inner wall of the housing 40.
  • the winding 22 is divided in the axial direction via the holding member 30, and constitutes a first winding 21a and a second winding 22b.
  • the groove 31 provided on the outer peripheral side of the holding member 30 and the inner wall of the housing 40 form a refrigerant path 32 for flowing the refrigerant.
  • the holding member 30 extends toward the center of the stator 20 so as to be disposed in a space between the first winding 21a and the second winding 22b.
  • the holding member 30 can mechanically hold the stator core 21 and the holding strength of the stator core 21 is improved.
  • the cooling efficiency can be improved.
  • the refrigerant path 32 is formed in a space between the groove 31 provided on the outer peripheral side of the holding member 30 and the inner wall of the housing 40, it is not necessary to process the inner wall of the housing 40. It is also possible to reduce costs.
  • the winding 22 as a heat source is divided in the axial direction via the holding member 30 and the first winding 22a and the second winding 22b are formed. Since it can be used as a heat dissipation surface, it is possible to improve the cooling performance.
  • An O-ring 35 is provided on the outer peripheral side of the holding member 30. Thereby, the sealing performance of the refrigerant path 32 formed when the holding member 30 is held on the housing 40 is improved, and the reliability of the refrigerant path can be improved.
  • FIG. 3 is a perspective view for explaining a fixing method for fixing the core 21 to the holding member 30.
  • FIG. 4 is a perspective view of a state in which the stator core 21 is fixed to the holding member 30.
  • the metal holding member 30 that holds the core 21 is provided with a plurality of notches 33 for holding the core 21 on the inner peripheral side.
  • a slit 21 a for fitting into a notch 33 on the inner peripheral side of the holding member 30 is provided in a substantially intermediate portion in the axial direction of the stator core 21.
  • stator core 21 is fitted and held in the notch 33 from the inner peripheral side of the holding member 30.
  • the fitting is performed by, for example, shrink fitting or press fitting. Thereby, the stator core 21 and the holding member 30 are thermally connected closely, and cooling of the stator core 21 and the coil
  • FIG. 5 is a perspective view for explaining a fixing method according to another embodiment for fixing the stator core 21 to the holding member 30.
  • the first winding 22a has a first center-side winding 25a arranged closer to the center of the stator 20 than the stator core 21.
  • the second winding 22b has a second central winding 25b disposed closer to the center of the stator 20 than the stator core 21.
  • the holding member 30 is extended to the space so as to occupy a volume of half or more of the space between the first center side winding 25a and the second center side winding 25b.
  • the protrusion A on the inner peripheral side of the holding member 30 has a maximum of the first central winding 25a and the second central winding of the winding. Extend to the same plane as 25b.
  • FIG. 6 is a perspective view showing the configuration of the windings 22u, 22v, 22w of the respective energized phases and the stator cores 21u, 21v, 21w.
  • the windings 22u to 22w of each phase are wound in the circumferential direction of the respective stator cores 21u to 21w by concentrated winding.
  • the windings 22u to 22w are continuously wound and arranged in the axial direction, so that the contact area between the winding strands increases, so that the thermal conductivity between the winding strands is improved. Therefore, it is possible to improve the cooling efficiency.
  • FIG. 7 is a cross-sectional view showing the structure of the winding.
  • the first winding 22a and the second winding 22b are configured by winding a square wire 24.
  • the rectangular wire 24 is provided with an insulating layer 24b around the conducting wire 24a. Thereby, a space factor becomes higher than the coil comprised by the round wire, it becomes possible to suppress the thermal resistance between each strand, and to improve heat conductivity.
  • first winding 22a or the second winding 22b is wound around the stator core 21 a plurality of times so as to be arranged in a line in a direction perpendicular to the arrangement direction of the adjacent stator cores 21.
  • the first winding 22 a or the second winding 22 b wound a plurality of times is arranged so as to be in thermal contact with the stator core 21.
  • Axial gap type rotating electrical machine 10 Rotor 11: Magnet 12: Structural material 20: Stator 21: Stator core 22: Winding 22a: First winding 22b: Second winding 30: Holding member 31: Groove 32: Refrigerant path 33: Notch 35: O-ring 40: Housing 50: Bearing 60: Shaft (rotary shaft)

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

　La présente invention permet d'améliorer l'efficacité de refroidissement d'un enroulement et de maintenir fermement un noyau de stator. La machine électrique tournante à entrefer axial comporte : un stator ; un premier rotor ; un second rotor ; et un logement qui contient le stator, le premier rotor et le second rotor ; le stator comporte une pluralité de noyaux de stator, un élément de retenue qui retient la pluralité des noyaux de stator, un premier enroulement enroulé sur les noyaux de stator et qui est installé plus près du premier rotor que l'élément de retenue, et un second enroulement enroulé sur les noyaux de stator et qui est installé plus près du second rotor que l'élément de retenue. L'élément de retenue est fixé au logement de sorte qu'une partie de l'élément de retenue et une paroi intérieure du logement forment un espace de canal dans lequel s'écoule un liquide de refroidissement ; de plus, l'élément de retenue se déploie en direction d'une partie centrale du stator, de manière à ménager un espace entre le premier enroulement et le second enroulement.
PCT/JP2013/081225 2013-11-20 2013-11-20 Machine electrique tournante a entrefer axial Ceased WO2015075784A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2015548910A JPWO2015075784A1 (ja) 2013-11-20 2013-11-20 アキシャルギャップ型回転電機
PCT/JP2013/081225 WO2015075784A1 (fr) 2013-11-20 2013-11-20 Machine electrique tournante a entrefer axial

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2013/081225 WO2015075784A1 (fr) 2013-11-20 2013-11-20 Machine electrique tournante a entrefer axial

Publications (1)

Publication Number Publication Date
WO2015075784A1 true WO2015075784A1 (fr) 2015-05-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/081225 Ceased WO2015075784A1 (fr) 2013-11-20 2013-11-20 Machine electrique tournante a entrefer axial

Country Status (2)

Country Link
JP (1) JPWO2015075784A1 (fr)
WO (1) WO2015075784A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2580920A (en) * 2019-01-29 2020-08-05 Saietta Group Ltd Axial flux electrical machine and ancillary components
JP2021191215A (ja) * 2020-05-26 2021-12-13 株式会社Ｃｃｕリニアモータ研究所 モータ或は発電機さらにまたリニアモータ〔３〕
WO2023282176A1 (fr) * 2021-07-08 2023-01-12 株式会社明電舎 Moteur à entrefer axial
WO2023056496A1 (fr) * 2021-10-07 2023-04-13 Miba Emobility Gmbh Machine à flux axial
WO2023111588A1 (fr) * 2021-12-16 2023-06-22 Saietta Group PLC Machine électrique à stator à enroulement empilé
US20240014699A1 (en) * 2022-07-05 2024-01-11 GM Global Technology Operations LLC Thermal connection system for a stator core of an axial flux electric motor
WO2024132602A1 (fr) * 2022-12-22 2024-06-27 Valeo Equipements Electriques Moteur Machine électrique tournante à flux axial
US12537410B2 (en) 2019-01-29 2026-01-27 Exedy Clutch Europe Limited Axial flux electrical machine with stator housing with plurality of recesses accomodating outer part of the conductive coil of a stator; and ancillary components

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61109448A (ja) * 1984-11-01 1986-05-27 Fanuc Ltd 同期モ−タ
JP2001500353A (ja) * 1996-08-09 2001-01-09 ザ・ターボ・ゲンセット・カンパニー・リミテッド 回転電気機械
JP2002513269A (ja) * 1998-04-29 2002-05-08 ウィッテリー エリック 軸方向にエアーギャップを有するモジュラモータ
WO2006068042A1 (fr) * 2004-12-24 2006-06-29 Sumitomo Electric Industries, Ltd. Moteur a espace axial
JP2010172094A (ja) * 2009-01-22 2010-08-05 Daihatsu Motor Co Ltd モータ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61109448A (ja) * 1984-11-01 1986-05-27 Fanuc Ltd 同期モ−タ
JP2001500353A (ja) * 1996-08-09 2001-01-09 ザ・ターボ・ゲンセット・カンパニー・リミテッド 回転電気機械
JP2002513269A (ja) * 1998-04-29 2002-05-08 ウィッテリー エリック 軸方向にエアーギャップを有するモジュラモータ
WO2006068042A1 (fr) * 2004-12-24 2006-06-29 Sumitomo Electric Industries, Ltd. Moteur a espace axial
JP2010172094A (ja) * 2009-01-22 2010-08-05 Daihatsu Motor Co Ltd モータ

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7633168B2 (ja) 2019-01-29 2025-02-19 サイエッタ グループ ピーエルシー アキシャルフラックス電気機械のステータハウジング
JP2022519097A (ja) * 2019-01-29 2022-03-18 サイエッタ グループ ピーエルシー アキシャルフラックス電気機械及び補助コンポーネント
GB2580920A (en) * 2019-01-29 2020-08-05 Saietta Group Ltd Axial flux electrical machine and ancillary components
US12537410B2 (en) 2019-01-29 2026-01-27 Exedy Clutch Europe Limited Axial flux electrical machine with stator housing with plurality of recesses accomodating outer part of the conductive coil of a stator; and ancillary components
JP2021191215A (ja) * 2020-05-26 2021-12-13 株式会社Ｃｃｕリニアモータ研究所 モータ或は発電機さらにまたリニアモータ〔３〕
JP7074983B2 (ja) 2020-05-26 2022-05-25 株式会社Ｃｃｕリニアモータ研究所 モータ或は発電機さらにまたリニアモータ〔３〕
WO2023282176A1 (fr) * 2021-07-08 2023-01-12 株式会社明電舎 Moteur à entrefer axial
JP2023009830A (ja) * 2021-07-08 2023-01-20 株式会社明電舎 アキシャルギャップモータ
WO2023056496A1 (fr) * 2021-10-07 2023-04-13 Miba Emobility Gmbh Machine à flux axial
WO2023111588A1 (fr) * 2021-12-16 2023-06-22 Saietta Group PLC Machine électrique à stator à enroulement empilé
US20240014699A1 (en) * 2022-07-05 2024-01-11 GM Global Technology Operations LLC Thermal connection system for a stator core of an axial flux electric motor
US12244178B2 (en) * 2022-07-05 2025-03-04 GM Global Technology Operations LLC Thermal connection system for a stator core of an axial flux electric motor
WO2024132602A1 (fr) * 2022-12-22 2024-06-27 Valeo Equipements Electriques Moteur Machine électrique tournante à flux axial
FR3144447A1 (fr) * 2022-12-22 2024-06-28 Valeo Equipements Electriques Moteur Machine électrique tournante à flux axial

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