WO2022128550A1 - Axial flux electric motor - Google Patents

Axial flux electric motor Download PDF

Info

Publication number
WO2022128550A1
WO2022128550A1 PCT/EP2021/084291 EP2021084291W WO2022128550A1 WO 2022128550 A1 WO2022128550 A1 WO 2022128550A1 EP 2021084291 W EP2021084291 W EP 2021084291W WO 2022128550 A1 WO2022128550 A1 WO 2022128550A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
rotors
stator
motor according
motor
Prior art date
Application number
PCT/EP2021/084291
Other languages
French (fr)
Inventor
Manuel Henner
Mouheb DHIFLI
Mohammed Ali BENHAMIDA
Original Assignee
Valeo Systemes Thermiques
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 Valeo Systemes Thermiques filed Critical Valeo Systemes Thermiques
Publication of WO2022128550A1 publication Critical patent/WO2022128550A1/en

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • 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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2793—Rotors axially facing stators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

  • the present invention relates to an electric motor with axial flux.
  • Patent US2013049512 discloses an axial flux synchronous generator for wind turbine generators, comprising a shaft coupled to receive energy with an energy generating device for the wind turbine; a rotor rotatably coupled to the shaft and having disc-shaped upper and lower faces secured with a plurality of permanent magnets.
  • the invention aims to improve axial flux electric motors.
  • the invention thus relates to an axial flux electric motor, comprising: at least one stator, at least two rotors each linked to a rotary shaft of the motor, these shafts being arranged to be able to rotate one independently of the the other around a common axis of rotation, thus forming two rotor stages, a stator assembly comprising two stators each associated with one of these rotors to develop a torque serving to rotate the shaft connected to this rotor.
  • the invention thus uses a two-stage axial flux electric motor.
  • the two rotors can thus be separated and each can be assigned a direction of rotation and a speed. They can be controlled independently and their power can be adjusted. They can be designed according to their respective needs, that is, their diameters, sizes, characteristics can be different. It is also possible to increase the number of stages, by having several rotors connected on the same shaft, and for the second stage several other rotors. The number of stator must be adapted accordingly. Each stator or rotor can use either one of its faces, or both, as will be seen below.
  • One of the rotor stages forms with a stator stage, or stator stage, a stage of the electric motor.
  • the invention allows in particular a high power density, independent stages whose power can be adjusted by design during dimensioning or in operation with the speed of rotation; simplicity in the arrangement of the rotor and the stator, which can be assembled at the end of assembly, when the parts are wound separately (winding and tooth can be made separately and mounted on a casing).
  • the invention also allows the mass to be optimized, in particular because there is no need for an outer casing made of magnetic material.
  • the invention allows a single axis which supports all the rotating elements.
  • the invention also allows all the external parts to have no magnetic or mechanical function and can be made of simple materials with low tolerances: Assembly is simplified, only the axis has to be precision machined.
  • one of the shafts is hollow, forming a central cavity and the other shaft extends at least partially into this central cavity.
  • one or more bearings are arranged in the central cavity, between the two shafts, so as to allow independent rotation of the two shafts .
  • a plurality of bearings are provided, concentrically and spaced apart along the axis of rotation of the shaft which is in the central cavity.
  • each shaft is for example linked to blades which must be rotated, these blades forming in particular a propeller.
  • the stator assembly comprises a plate which carries on each of its two faces a stator winding which is in electromagnetic interaction with respectively each of the rotors, each rotor facing the one of the windings so as to generate the torque which turns the shaft of the associated rotor.
  • each winding comprises, for example, one or more electric wires wound on teeth of the stator.
  • each rotor comprises permanent magnets defining electromagnetic poles which cooperate with the associated rotor to generate a motor torque for the shaft due to the presence of an electromagnetic field at axial flow.
  • the stator assembly comprises at least two stator stages, these stages each being associated with one of the rotors and comprising a plate carrying the winding which is distinct from a plate carrying the winding associated with the other rotor.
  • each stator stage comprises at least two plates carrying windings arranged to generate with the associated rotor axial fluxes.
  • one of the rotors comprises several rotor wheels each carrying a set of magnets, each set of magnets being associated with one of the windings of a stator stage to generate an axial flow.
  • one of the stator stages has 3 plates carrying a total of 4 windings cooperating with two rotor wheels, each wheel being placed axially between two stator coils.
  • the other of the stator stages also comprises 3 plates carrying a total of 4 windings cooperating with two wheels of the rotor, each wheel being placed axially between two stator coils.
  • the rotor wheels and the stator plates are all arranged concentrically and transversely to the axis of rotation.
  • the motor has a casing and the stators are all held inside or on this casing.
  • the rotor magnets are permanent magnets.
  • the motor comprises control electronics arranged to control the rotation of the rotors, in particular independent rotation of the rotors.
  • the rotations can for example be done at different speeds, and/or with a simultaneous or staggered start, depending on the controller's choice.
  • FIG.1 is a schematic view of an engine according to an example of the invention.
  • FIG.2 schematically and partially represents an engine according to another exemplary embodiment of the invention.
  • FIG. 1 There is shown in Figure 1 an axial flux electric motor 1 which comprises two rotors 3 each connected to a shaft 4; 5 rotary engine, these shafts 4 and 5 being arranged to be able to rotate one independently of the other around a common axis of rotation X, thus forming two stages 6 of the rotor.
  • the motor 1 also comprises a stator assembly 10 comprising two stators 11, 12 each associated with one of these rotors to develop a torque used to rotate the shaft connected to this rotor.
  • the direction of the magnetic field is parallel to the axis of rotation of the motor.
  • the conducting wires of the windings traversed by the electric current are arranged radially.
  • the rotor comprises permanent magnets 13 whose magnetization and arrangement make it possible to create an alternating magnetic field in the axial direction X.
  • the direction of the magnetization is alternated between two successive poles.
  • the number of times the direction of magnetization is reversed during one complete rotation of the rotor is called the number of poles. This number being even, the motor is said to have 2p poles, p being an integer.
  • the stator 1 1, 12 comprises windings or windings 16 allowing the conductors to cross the air gap 14 formed by the rotor, and thus to generate a torque when they are crossed by an electric current.
  • Shaft 5 is hollow forming a central cavity 17 and the other shaft 4 extends at least partially into this central cavity 17.
  • bearings 18, including ball bearings or needle bearings, are arranged in the central cavity 17, between the two shafts 4 and 5, so as to allow independent rotation of the two shafts.
  • a plurality of bearings 18 are provided, concentrically and spaced along the axis of rotation X of the shaft which is in the central cavity 7.
  • Each shaft 4 and 5 is for example linked to blades which must be rotated, these blades forming in particular a propeller.
  • the stator assembly 10 comprises a plate 19 which carries on each of its two faces a stator winding 16 which is in electromagnetic interaction with each of the rotors respectively, each rotor facing one of the windings so as to generate the torque that turns the associated rotor shaft.
  • Each winding 16 comprises for example one or more electrical son wound on teeth of the stator.
  • Each rotor 3 comprises permanent magnets 13 defining electromagnetic poles which cooperate with the associated rotor to generate motor torque for the shaft due to the presence of an electromagnetic field with axial flux.
  • the stator assembly comprises at least two stator stages 20 and 21, these stages each being associated with one of the rotors and comprising sets 22 and 23 of plates respectively carrying the winding which is separate from a plate carrying the winding associated with the other rotor.
  • Each stator stage 20, 21 comprises at least two plates carrying windings arranged to generate with the associated rotor axial fluxes.
  • One of the rotors comprises several rotor wheels 26 each carrying a set of magnets, each set of magnets being associated with one of the windings of a stator stage 20 to generate an axial flux.
  • one of the stator stages 20 comprises 3 plates carrying a total of 4 windings cooperating with two wheels 26 of the rotor, each wheel being placed axially between two stator coils.
  • the other of the stator stages 21 also comprises 3 plates 23 carrying a total of 4 windings cooperating with two wheels of the rotor, each wheel being placed axially between two stator coils.
  • the rotor wheels 26 and the stator plates 22, 23 are all arranged concentrically and transversely to the axis of rotation.
  • the motor has a casing 30 and the stators are all held inside or on this casing 30.
  • the rotor magnets are permanent magnets.
  • the engine includes control electronics 31 arranged to control the rotation of the rotors, in particular independent rotation of the rotors.
  • the rotations can for example be done at different speeds, and/or with a simultaneous or staggered start, at the choice of the control.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

The invention relates to an axial flux electric motor (1), comprising: - at least two rotors (3) each connected to a rotating shaft (4, 5) of the motor, said shafts being configured so as to rotate independently of each other about a shared axis of rotation, thus forming two rotor stages, - a stator assembly (10) comprising two stators (11, 12) each associated with one of said rotors so as to develop a torque for rotating the shaft connected to said rotor.

Description

TITRE : MOTEUR ELECTRIQUE A FLUX AXIAL TITLE: AXIAL FLUX ELECTRIC MOTOR
[1 ] La présente invention concerne un moteur électrique à flux axial. [1] The present invention relates to an electric motor with axial flux.
[2] On connait par le brevet US2013049512 un générateur synchrone à flux axial pour générateurs d'éoliennes, comprenant un arbre couplé pour recevoir de l'énergie avec un appareil de génération d'énergie pour l'éolienne; un rotor couplé de façon rotative à l'arbre et ayant des faces supérieure et inférieure en forme de disque fixées avec une pluralité d'aimants permanents. [2] Patent US2013049512 discloses an axial flux synchronous generator for wind turbine generators, comprising a shaft coupled to receive energy with an energy generating device for the wind turbine; a rotor rotatably coupled to the shaft and having disc-shaped upper and lower faces secured with a plurality of permanent magnets.
[3] L’invention vise à améliorer les moteurs électriques à flux axiaux. [3] The invention aims to improve axial flux electric motors.
[4] L’invention a ainsi pour objet un moteur électrique à flux axial, comportant : au moins un stator, au moins deux rotors liés chacun à un arbre rotatif du moteur, ces arbres étant agencés pour pouvoir tourner l’un indépendamment de l’autre autour d’un axe de rotation commun, formant ainsi deux étages de rotor, un ensemble statorique comprenant deux stators associés chacun à l’un de ces rotors pour développer un couple servant à faire tourner l’arbre lié à ce rotor. [4] The invention thus relates to an axial flux electric motor, comprising: at least one stator, at least two rotors each linked to a rotary shaft of the motor, these shafts being arranged to be able to rotate one independently of the the other around a common axis of rotation, thus forming two rotor stages, a stator assembly comprising two stators each associated with one of these rotors to develop a torque serving to rotate the shaft connected to this rotor.
[5] L'invention utilise ainsi un moteur électrique à flux axial à deux étages. Les deux rotors peuvent ainsi être dissociés et chacun peut se voir attribuer un sens de rotation et une vitesse. Ils peuvent être contrôlés indépendamment et leur puissance peut être ajustée. Ils peuvent être conçus en fonction de leurs besoins respectifs, c'est-à-dire que leurs diamètres, tailles, caractéristiques peuvent être différents. Il est également possible d'augmenter le nombre d'étages, en ayant plusieurs rotors reliés sur le même arbre, et pour le deuxième étage plusieurs autres rotors. Le nombre de stator doit être adapté en conséquence. Chaque stator ou rotor peut utiliser soit l'une de ses faces, soit les deux, comme on va le voir ci-dessous. [5] The invention thus uses a two-stage axial flux electric motor. The two rotors can thus be separated and each can be assigned a direction of rotation and a speed. They can be controlled independently and their power can be adjusted. They can be designed according to their respective needs, that is, their diameters, sizes, characteristics can be different. It is also possible to increase the number of stages, by having several rotors connected on the same shaft, and for the second stage several other rotors. The number of stator must be adapted accordingly. Each stator or rotor can use either one of its faces, or both, as will be seen below.
[6] L’un des étages de rotor forme avec un étage de stator, ou étage statorique, un étage du moteur électrique. [6] One of the rotor stages forms with a stator stage, or stator stage, a stage of the electric motor.
[7] Du point de vue moteur l’invention permet notamment une haute densité de puissance, des étages indépendants dont la puissance peut être réglée par conception au dimensionnement ou en fonctionnement avec la vitesse de rotation; une simplicité dans l'agencement du rotor et du stator, qui peuvent être assemblés en fin de montage, lorsque les pièces sont bobinées séparément (bobinage et dent peuvent être réalisés séparément et montés sur un carter). [8] L’invention permet aussi que la masse peut être optimisée, notamment parce que il n'y a pas besoin d'un boîtier extérieur en matériau magnétique. [7] From the engine point of view, the invention allows in particular a high power density, independent stages whose power can be adjusted by design during dimensioning or in operation with the speed of rotation; simplicity in the arrangement of the rotor and the stator, which can be assembled at the end of assembly, when the parts are wound separately (winding and tooth can be made separately and mounted on a casing). [8] The invention also allows the mass to be optimized, in particular because there is no need for an outer casing made of magnetic material.
[9] D'un point de vue mécanique, l’invention permet un seul axe qui supporte tous les éléments rotatifs. [9] From a mechanical point of view, the invention allows a single axis which supports all the rotating elements.
[10] L’invention permet également que toutes les pièces externes n'ont pas de fonction magnétique ou mécanique et peuvent être constituées de matériaux simples avec de faibles tolérances: Le montage est simplifié, seul l'axe doit être usiné avec précision. [10] The invention also allows all the external parts to have no magnetic or mechanical function and can be made of simple materials with low tolerances: Assembly is simplified, only the axis has to be precision machined.
[1 1] Selon l’un des aspects de l’invention, l’un des arbres est creux en formant une cavité centrale et l’autre arbre s’étend au moins partiellement dans cette cavité centrale. [1 1] According to one of the aspects of the invention, one of the shafts is hollow, forming a central cavity and the other shaft extends at least partially into this central cavity.
[12] Selon l’un des aspects de l’invention, un ou plusieurs roulements, notamment des roulements à billes ou à aiguilles, sont disposés dans la cavité centrale, entre les deux arbres, de sorte à permettre une rotation indépendante des deux arbres. [12] According to one of the aspects of the invention, one or more bearings, in particular ball or needle bearings, are arranged in the central cavity, between the two shafts, so as to allow independent rotation of the two shafts .
[13] Selon l’un des aspects de l’invention, une pluralité de roulements sont prévus, de manière concentrique et espacée le long de l’axe de rotation de l’arbre qui est dans la cavité centrale. [13] According to one aspect of the invention, a plurality of bearings are provided, concentrically and spaced apart along the axis of rotation of the shaft which is in the central cavity.
[14] Selon l’un des aspects de l’invention, chaque arbre est par exemple lié à des pales qui doivent être mises en rotation, ces pales formant notamment une hélice. [14] According to one of the aspects of the invention, each shaft is for example linked to blades which must be rotated, these blades forming in particular a propeller.
[15] Selon l’un des aspects de l’invention, l’ensemble statorique comporte un plateau qui porte sur chacune de ses deux faces un bobinage statorique qui est en interaction électromagnétique avec respectivement chacun des rotors, chaque rotor faisant face à l’un des bobinages de manière à générer le couple qui fait tourner l’arbre du rotor associé. [15] According to one of the aspects of the invention, the stator assembly comprises a plate which carries on each of its two faces a stator winding which is in electromagnetic interaction with respectively each of the rotors, each rotor facing the one of the windings so as to generate the torque which turns the shaft of the associated rotor.
[16] Selon l’un des aspects de l’invention, chaque bobinage comporte par exemple un ou plusieurs fils électriques bobinés sur des dents du stator. [16] According to one of the aspects of the invention, each winding comprises, for example, one or more electric wires wound on teeth of the stator.
[17] Selon l’un des aspects de l’invention, chaque rotor comporte des aimants permanents définissant des pôles électromagnétiques qui coopèrent avec le rotor associé pour générer un couple moteur pour l’arbre du fait de la présence d’un champ électromagnétique à flux axial. [17] According to one of the aspects of the invention, each rotor comprises permanent magnets defining electromagnetic poles which cooperate with the associated rotor to generate a motor torque for the shaft due to the presence of an electromagnetic field at axial flow.
[18] Selon l’un des aspects de l’invention, l’ensemble statorique comporte au moins deux étages statoriques, ces étages étant chacun associé à l’un des rotors et comportant un plateau portant le bobinage qui est distinct d’un plateau portant le bobinage associé à l’autre rotor. [18] According to one of the aspects of the invention, the stator assembly comprises at least two stator stages, these stages each being associated with one of the rotors and comprising a plate carrying the winding which is distinct from a plate carrying the winding associated with the other rotor.
[19] Selon l’un des aspects de l’invention, chaque étage statorique comporte au moins deux plateaux portant des bobinages agencés pour générer avec le rotor associé des flux axiaux. [20] Selon l’un des aspects de l’invention, l’un des rotors comporte plusieurs roues de rotor portant chacun un jeu d’aimants, chaque jeu d’aimants étant associé à l’un des bobinages d’un étage statorique pour générer un flux axial. [19] According to one of the aspects of the invention, each stator stage comprises at least two plates carrying windings arranged to generate with the associated rotor axial fluxes. [20] According to one of the aspects of the invention, one of the rotors comprises several rotor wheels each carrying a set of magnets, each set of magnets being associated with one of the windings of a stator stage to generate an axial flow.
[21] Par exemple l’un des étages statorique comporte 3 plateaux portant au total 4 bobinages coopérant avec deux roues du rotor, chaque roue étant placé axialement entre deux bobines de stator. [21] For example, one of the stator stages has 3 plates carrying a total of 4 windings cooperating with two rotor wheels, each wheel being placed axially between two stator coils.
[22] Par exemple l’autre des étages statorique comporte également 3 plateaux portant au total 4 bobinages coopérant avec deux roues du rotor, chaque roue étant placé axialement entre deux bobines de stator. [22] For example, the other of the stator stages also comprises 3 plates carrying a total of 4 windings cooperating with two wheels of the rotor, each wheel being placed axially between two stator coils.
[23] Selon l’un des aspects de l’invention, les roues de rotor et les plateaux de stator sont tous disposés de manière concentrique et transversalement à l’axe de rotation. [23] According to one aspect of the invention, the rotor wheels and the stator plates are all arranged concentrically and transversely to the axis of rotation.
[24] Selon l’un des aspects de l’invention, le moteur comporte un carter et les stators sont tous maintenus à l’intérieur ou sur ce carter. [24] According to one aspect of the invention, the motor has a casing and the stators are all held inside or on this casing.
[25] Selon l’un des aspects de l’invention, les aimants des rotors sont des aimants permanents. [25] According to one aspect of the invention, the rotor magnets are permanent magnets.
[26] Selon l’un des aspects de l’invention, le moteur comporte une électronique de contrôle agencée pour contrôler la rotation des rotors, notamment des mises en rotation indépendantes des rotors. [26] According to one of the aspects of the invention, the motor comprises control electronics arranged to control the rotation of the rotors, in particular independent rotation of the rotors.
[27] Les rotations peuvent par exemples se faire à des vitesses différentes, et/ou avec un démarrage simultanément ou en décalé, au choix du contrôle. [27] The rotations can for example be done at different speeds, and/or with a simultaneous or staggered start, depending on the controller's choice.
[28] D'autres caractéristiques, détails et avantages de l'invention ressortiront plus clairement à la lecture de la description détaillée donnée ci-après, et de plusieurs exemples de réalisation donnés à titre indicatif et non limitatif en référence aux dessins schématiques annexés d’autre part, sur lesquels : [28] Other characteristics, details and advantages of the invention will emerge more clearly on reading the detailed description given below, and several embodiments given by way of indication and not limitation with reference to the appended schematic drawings of on the other hand, on which:
[29] [Fig.1 ] est une vue schématique d’un moteur selon un exemple de l’invention, [29] [Fig.1] is a schematic view of an engine according to an example of the invention,
[30] [Fig.2] représente schématiquement et partiellement un moteur selon un autre exemple de réalisation de l’invention. [30] [Fig.2] schematically and partially represents an engine according to another exemplary embodiment of the invention.
[31] On a représenté sur la figure 1 un moteur électrique à flux axial 1 qui comportant deux rotors 3 liés chacun à un arbre 4 ; 5 rotatif du moteur, ces arbres 4 et 5 étant agencés pour pouvoir tourner l’un indépendamment de l’autre autour d’un axe de rotation commun X, formant ainsi deux étages 6 de rotor. [32] Le moteur 1 comprend également un ensemble statorique 10 comprenant deux stators 11 , 12 associés chacun à l’un de ces rotors pour développer un couple servant à faire tourner l’arbre lié à ce rotor. [31] There is shown in Figure 1 an axial flux electric motor 1 which comprises two rotors 3 each connected to a shaft 4; 5 rotary engine, these shafts 4 and 5 being arranged to be able to rotate one independently of the other around a common axis of rotation X, thus forming two stages 6 of the rotor. [32] The motor 1 also comprises a stator assembly 10 comprising two stators 11, 12 each associated with one of these rotors to develop a torque used to rotate the shaft connected to this rotor.
[33] De manière générale, dans un moteur à flux axial, la direction du champ magnétique est parallèle à l'axe de rotation du moteur. Les fils conducteurs des bobinages parcourus par le courant électrique sont, eux, disposés radialement. Le rotor comprend des aimants permanents 13 dont la magnétisation et la disposition permettent de créer un champ magnétique alternatif dans la direction axiale X. Le sens de la magnétisation est alterné entre deux pôles successifs. Le nombre de fois où le sens de la magnétisation est inversé au cours d'une rotation complète du rotor est appelé nombre de pôles. Ce nombre étant pair, on dit que le moteur possède 2p pôles, p étant un nombre 15 entier. Le stator 1 1 , 12 comporte des enroulements ou bobinages 16 permettant aux conducteurs de traverser l'entrefer 14 formé par le rotor, et ainsi de générer un couple lorsqu'ils sont traversés par un courant électrique. [33] Generally, in an axial flux motor, the direction of the magnetic field is parallel to the axis of rotation of the motor. The conducting wires of the windings traversed by the electric current are arranged radially. The rotor comprises permanent magnets 13 whose magnetization and arrangement make it possible to create an alternating magnetic field in the axial direction X. The direction of the magnetization is alternated between two successive poles. The number of times the direction of magnetization is reversed during one complete rotation of the rotor is called the number of poles. This number being even, the motor is said to have 2p poles, p being an integer. The stator 1 1, 12 comprises windings or windings 16 allowing the conductors to cross the air gap 14 formed by the rotor, and thus to generate a torque when they are crossed by an electric current.
[34] L’arbre 5 est creux en formant une cavité centrale 17 et l’autre arbre 4 s’étend au moins partiellement dans cette cavité centrale 17. [34] Shaft 5 is hollow forming a central cavity 17 and the other shaft 4 extends at least partially into this central cavity 17.
[35] Plusieurs roulements 18, notamment des roulements à billes ou à aiguilles, sont disposés dans la cavité centrale 17, entre les deux arbres 4 et 5, de sorte à permettre une rotation indépendante des deux arbres. [35] Several bearings 18, including ball bearings or needle bearings, are arranged in the central cavity 17, between the two shafts 4 and 5, so as to allow independent rotation of the two shafts.
[36] Une pluralité de roulements 18 sont prévus, de manière concentrique et espacée le long de l’axe de rotation X de l’arbre qui est dans la cavité centralel 7. [36] A plurality of bearings 18 are provided, concentrically and spaced along the axis of rotation X of the shaft which is in the central cavity 7.
[37] Chaque arbre 4 et 5 est par exemple lié à des pales qui doivent être mises en rotation, ces pales formant notamment une hélice. [37] Each shaft 4 and 5 is for example linked to blades which must be rotated, these blades forming in particular a propeller.
[38] L’ensemble statorique 10 comporte un plateau 19 qui porte sur chacune de ses deux faces un bobinage statorique 16 qui est en interaction électromagnétique avec respectivement chacun des rotors, chaque rotor faisant face à l’un des bobinages de manière à générer le couple qui fait tourner l’arbre du rotor associé. [38] The stator assembly 10 comprises a plate 19 which carries on each of its two faces a stator winding 16 which is in electromagnetic interaction with each of the rotors respectively, each rotor facing one of the windings so as to generate the torque that turns the associated rotor shaft.
[39] Chaque bobinage 16 comporte par exemple un ou plusieurs fils électriques bobinés sur des dents du stator. [39] Each winding 16 comprises for example one or more electrical son wound on teeth of the stator.
[40] Chaque rotor 3 comporte des aimants permanents 13 définissant des pôles électromagnétiques qui coopèrent avec le rotor associé pour générer un couple moteur pour l’arbre du fait de la présence d’un champ électromagnétique à flux axial. [40] Each rotor 3 comprises permanent magnets 13 defining electromagnetic poles which cooperate with the associated rotor to generate motor torque for the shaft due to the presence of an electromagnetic field with axial flux.
[41] Dans l’exemple de réalisation de la figure 2, l’ensemble statorique comporte au moins deux étages statoriques 20 et 21 , ces étages étant chacun associé à l’un des rotors et comportant des ensembles 22 et 23 de plateaux respectivement portant le bobinage qui est distinct d’un plateau portant le bobinage associé à l’autre rotor. [41] In the embodiment of Figure 2, the stator assembly comprises at least two stator stages 20 and 21, these stages each being associated with one of the rotors and comprising sets 22 and 23 of plates respectively carrying the winding which is separate from a plate carrying the winding associated with the other rotor.
[42] Chaque étage statorique 20, 21 comporte au moins deux plateaux portant des bobinages agencés pour générer avec le rotor associé des flux axiaux. [42] Each stator stage 20, 21 comprises at least two plates carrying windings arranged to generate with the associated rotor axial fluxes.
[43] L’un des rotors comporte plusieurs roues 26 de rotor portant chacun un jeu d’aimants, chaque jeu d’aimants étant associé à l’un des bobinages d’un étage statorique 20 pour générer un flux axial. [43] One of the rotors comprises several rotor wheels 26 each carrying a set of magnets, each set of magnets being associated with one of the windings of a stator stage 20 to generate an axial flux.
[44] Par exemple l’un des étages statorique 20 comporte 3 plateaux portant au total 4 bobinages coopérant avec deux roues 26 du rotor, chaque roue étant placé axialement entre deux bobines de stator. [44] For example, one of the stator stages 20 comprises 3 plates carrying a total of 4 windings cooperating with two wheels 26 of the rotor, each wheel being placed axially between two stator coils.
[45] Par exemple l’autre des étages statorique 21 comporte également 3 plateaux 23 portant au total 4 bobinages coopérant avec deux roues du rotor, chaque roue étant placé axialement entre deux bobines de stator. [45] For example, the other of the stator stages 21 also comprises 3 plates 23 carrying a total of 4 windings cooperating with two wheels of the rotor, each wheel being placed axially between two stator coils.
[46] Les roues 26 de rotor et les plateaux 22, 23 de stator sont tous disposés de manière concentrique et transversalement à l’axe de rotation. [46] The rotor wheels 26 and the stator plates 22, 23 are all arranged concentrically and transversely to the axis of rotation.
[47] Le moteur comporte un carter 30 et les stators sont tous maintenus à l’intérieur ou sur ce carter 30. [47] The motor has a casing 30 and the stators are all held inside or on this casing 30.
[48] Les aimants des rotors sont des aimants permanents. [48] The rotor magnets are permanent magnets.
[49] Le moteur comporte une électronique de contrôle 31 agencée pour contrôler la rotation des rotors, notamment des mises en rotation indépendantes des rotors. [49] The engine includes control electronics 31 arranged to control the rotation of the rotors, in particular independent rotation of the rotors.
[50] Les rotations peuvent par exemples se faire à des vitesses différentes, et/ou avec un démarrage simultanément ou en décalé, au choix du contrôle. [50] The rotations can for example be done at different speeds, and/or with a simultaneous or staggered start, at the choice of the control.

Claims

REVENDICATIONS
[Revendication 1 ] Moteur électrique à flux axial (1 ), comportant : au moins deux rotors (3) liés chacun à un arbre rotatif (4, 5) du moteur, ces arbres étant agencés pour pouvoir tourner l’un indépendamment de l’autre autour d’un axe de rotation commun, formant ainsi deux étages de rotor, un ensemble statorique (10) comprenant deux stators (11 , 12) associés chacun à l’un de ces rotors pour développer un couple servant à faire tourner l’arbre lié à ce rotor. [Claim 1] Axial flux electric motor (1), comprising: at least two rotors (3) each connected to a rotary shaft (4, 5) of the motor, these shafts being arranged to be able to rotate one independently of the another around a common axis of rotation, thus forming two rotor stages, a stator assembly (10) comprising two stators (11, 12) each associated with one of these rotors to develop a torque serving to rotate the shaft connected to this rotor.
[Revendication 2] Moteur selon la revendication précédente, dans lequel l’un des arbres (5) est creux en formant une cavité centrale (17) et l’autre arbre s’étend au moins partiellement dans cette cavité centrale. [Claim 2] Motor according to the preceding claim, in which one of the shafts (5) is hollow forming a central cavity (17) and the other shaft extends at least partially into this central cavity.
[Revendication 3] Moteur selon la revendication précédente, dans lequel un ou plusieurs roulements (18), notamment des roulements à billes ou à aiguilles, sont disposés dans la cavité centrale, entre les deux arbres, de sorte à permettre une rotation indépendante des deux arbres. [Claim 3] Motor according to the preceding claim, in which one or more bearings (18), in particular ball or needle bearings, are arranged in the central cavity, between the two shafts, so as to allow independent rotation of the two trees.
[Revendication 4] Moteur selon l’une des revendications précédentes, dans lequel l’ensemble statorique comporte un plateau (10) qui porte sur chacune de ses deux faces un bobinage statorique qui est en interaction électromagnétique avec respectivement chacun des rotors, chaque rotor faisant face à l’un des bobinages de manière à générer le couple qui fait tourner l’arbre du rotor associé. [Claim 4] Motor according to one of the preceding claims, in which the stator assembly comprises a plate (10) which carries on each of its two faces a stator winding which is in electromagnetic interaction with each of the rotors respectively, each rotor facing one of the windings so as to generate the torque which turns the shaft of the associated rotor.
[Revendication 5] Moteur selon l’une des revendications précédentes, dans lequel l’ensemble statorique comporte au moins deux étages statoriques (20, 21 ), ces étages étant chacun associé à l’un des rotors et comportant un plateau portant le bobinage qui est distinct d’un plateau portant le bobinage associé à l’autre rotor. [Claim 5] Motor according to one of the preceding claims, in which the stator assembly comprises at least two stator stages (20, 21), these stages each being associated with one of the rotors and comprising a plate carrying the winding which is separate from a plate carrying the winding associated with the other rotor.
[Revendication 6] Moteur selon la revendication précédente, dans lequel chaque étage statorique comporte au moins deux plateaux portant des bobinages agencés pour générer avec le rotor associé des flux axiaux. [Claim 6] Motor according to the preceding claim, in which each stator stage comprises at least two plates carrying windings arranged to generate axial fluxes with the associated rotor.
[Revendication 7] Moteur selon la revendication précédente, dans lequel l’un des rotors comporte plusieurs roues (26) de rotor portant chacun un jeu d’aimants, chaque jeu d’aimants étant associé à l’un des bobinages d’un étage statorique pour générer un flux axial. [Claim 7] Motor according to the preceding claim, in which one of the rotors comprises several rotor wheels (26) each carrying a set of magnets, each set of magnets being associated with one of the windings of a stage stator to generate axial flux.
[Revendication 8] Moteur selon l’une des revendications précédentes, dans lequel le moteur comporte un carter et les stators sont tous maintenus à l’intérieur ou sur ce carter. [Revendication 9] Moteur selon l’une des revendications précédentes, dans lequel il comporte une électronique de contrôle agencée pour contrôler la rotation des rotors, notamment des mises en rotation indépendantes des rotors. [Claim 8] Motor according to one of the preceding claims, in which the motor comprises a casing and the stators are all held inside or on this casing. [Claim 9] Motor according to one of the preceding claims, in which it comprises control electronics arranged to control the rotation of the rotors, in particular independent rotation of the rotors.
PCT/EP2021/084291 2020-12-16 2021-12-03 Axial flux electric motor WO2022128550A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FRFR2013352 2020-12-16
FR2013352A FR3117702A1 (en) 2020-12-16 2020-12-16 Axial Flux Electric Motor

Publications (1)

Publication Number Publication Date
WO2022128550A1 true WO2022128550A1 (en) 2022-06-23

Family

ID=74592219

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/084291 WO2022128550A1 (en) 2020-12-16 2021-12-03 Axial flux electric motor

Country Status (2)

Country Link
FR (1) FR3117702A1 (en)
WO (1) WO2022128550A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060028081A1 (en) * 2004-08-06 2006-02-09 Nissan Motor Co., Ltd. Axial gap electric motor
US20100072850A1 (en) * 2007-06-28 2010-03-25 Shin-Etsu Chemical Co., Ltd. Axial gap type rotating machine
US20130049512A1 (en) 2011-08-26 2013-02-28 Undustry-Academic Cooperation Foundation Of Kyungnam University Axial flux permanent magnet synchronous generator and motor
EP3611403A1 (en) * 2018-08-14 2020-02-19 Hamilton Sundstrand Corporation Jam-tolerant electric linear actuator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060028081A1 (en) * 2004-08-06 2006-02-09 Nissan Motor Co., Ltd. Axial gap electric motor
US20100072850A1 (en) * 2007-06-28 2010-03-25 Shin-Etsu Chemical Co., Ltd. Axial gap type rotating machine
US20130049512A1 (en) 2011-08-26 2013-02-28 Undustry-Academic Cooperation Foundation Of Kyungnam University Axial flux permanent magnet synchronous generator and motor
EP3611403A1 (en) * 2018-08-14 2020-02-19 Hamilton Sundstrand Corporation Jam-tolerant electric linear actuator

Also Published As

Publication number Publication date
FR3117702A1 (en) 2022-06-17

Similar Documents

Publication Publication Date Title
EP0158935A1 (en) Electrodynamic Vernier machine
JP6954581B2 (en) Generator with rotary speed booster
EP3927621B1 (en) Electric propulsion unit for an aircraft and method for using such a propulsion unit
EP2999102A2 (en) Rotary electrical machine comprising at least one stator and at least two rotors
EP2786470A2 (en) Rotor for a rotary electric machine and rotary electric machine comprising such a rotor
FR2997807A1 (en) SYNCHRONOUS ELECTRIC MOTOR WITH PERMANENT MAGNETS AND ELECTRIC COMPRESSOR COMPRISING SUCH AN ELECTRIC MOTOR
WO2015193562A1 (en) Electromagnetic synchronous motor with combined axial and radial magnetic fluxes
WO2022128550A1 (en) Axial flux electric motor
FR3051295A1 (en) ROTATING ELECTRIC MACHINE WITH INCREASED POWER
FR2554988A1 (en) STEPPING MOTOR OF THE POLYPHASE HYBRID TYPE AND ITS CONTROL DEVICE
EP3053262A2 (en) Multiphase electric rotating machine with at least five phases
WO2008096062A2 (en) Driving or power generating multiple phase electric machine
FR2930690A1 (en) Ironless spiral coil integrated electrical machine e.g. rotary type electrical machine, for bicycle, has movable parts or fixed part coupled to actuator when machine serves as generator to produce alternating current at terminals
FR3008539A1 (en) ELECTROMAGNETIC ACTUATOR POLYENTREFERS WITH PERMANENT MAGNETS AND WINDING ELEMENTS WITHOUT IRON
EP0321332A1 (en) Highly efficient electric motor showing low torque ripple
KR101818297B1 (en) Rotating Armature Type Wind Power Generator with Dual Field Windings
FR3001841A1 (en) ELECTROMAGNETIC ELECTROMAGNETIC MOTOR OR GENERATOR WITH PERMANENT MAGNETS AND WINDING ELEMENTS WITHOUT IRON
FR3098038A1 (en) ROTATING ELECTRIC MACHINE WITH CO-AXIAL CONFIGURATION
EP2005554A1 (en) Rotor for a rotor electrical machine comprising grooves for magnets
EP2600500A2 (en) Rotor of a rotating electric machine and rotating electric machine comprising such a rotor
KR102644703B1 (en) Superconducting magnetic gear device using superconducing coil, generating appartus using the same
FR3011405A1 (en) ELECTRICAL ROTATING ELECTRICAL MACHINE WITH AT LEAST FIVE PHASES WITH OPTIMIZED CONTROL
WO2015193563A1 (en) Electromagnetic synchronous motor with combined axial and radial magnetic fluxes with double excitation
RU69349U1 (en) ELECTRIC MACHINE
CH371507A (en) Rotary electric machine that can operate either as an alternator or as a synchronous motor

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21830634

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21830634

Country of ref document: EP

Kind code of ref document: A1