EP3175534A2 - Improved stator, and electrical machine comprising such a stator - Google Patents

Improved stator, and electrical machine comprising such a stator

Info

Publication number
EP3175534A2
EP3175534A2 EP15745540.3A EP15745540A EP3175534A2 EP 3175534 A2 EP3175534 A2 EP 3175534A2 EP 15745540 A EP15745540 A EP 15745540A EP 3175534 A2 EP3175534 A2 EP 3175534A2
Authority
EP
European Patent Office
Prior art keywords
stator
central portion
tooth
electric machine
inlet
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.)
Withdrawn
Application number
EP15745540.3A
Other languages
German (de)
French (fr)
Inventor
Pierre Dumas
Laurent Verdier
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.)
Lohr Electromecanique SAS
Original Assignee
Lohr Electromecanique SAS
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 Lohr Electromecanique SAS filed Critical Lohr Electromecanique SAS
Publication of EP3175534A2 publication Critical patent/EP3175534A2/en
Withdrawn legal-status Critical Current

Links

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
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H02K1/148—Sectional cores
    • 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
    • H02K1/187—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to inner stators
    • 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
    • H02K1/2786—Outer rotors
    • H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2789—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2791—Surface mounted magnets; Inset magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating

Definitions

  • the present invention relates to the general technical field of electric motors and more generally synchronous machines comprising means for generating a magnetic induction.
  • the present invention relates more particularly to an electric machine, for example a synchronous machine with sinusoidal or other electromotive force, fed by a polyphase alternating voltage.
  • the invention will be described hereinafter more particularly, but not exclusively, with means for generating a magnetic induction constituted by an exemplary embodiment of permanent magnets.
  • the electric machine is for example a wheel motor.
  • An electric machine with permanent magnets is generally constituted by a wound stator and a rotor carrying the permanent magnets and extending around said stator. Such an electric machine is powered and driven via a power electronics.
  • An electric machine with permanent magnets and sinusoidal electromotive force can be controlled with a vector control system.
  • This type of control known as such, provides high performance, namely high accuracy and high torque dynamics. These performances are necessary, especially for traction motors.
  • Electric machines are also known whose stator, including the stator teeth, is made with a joined assembly of sheets. Such a stator, once assembled, requires precise positioning to perform the winding of each tooth. These winding operations are difficult to implement and take a long time. In addition, the replacement of a defective winding of a tooth faces the same difficulties.
  • stator teeth mounted radially on a stator yoke have at their end in contact with the stator yoke, a relatively thick base for channeling the magnetic field lines. These bases must all be in contact in order to avoid passing the magnetic field lines in the air.
  • the dimensional tolerances observed on the stator teeth make such contact between the bases very random. This problem is all the more important as the number of stator teeth mounted on the stator yoke is high. This may attenuate the magnetic field lines and therefore affect the performance of these synchronous machines. Disclosure of the invention
  • the object of the present invention is therefore to overcome the disadvantages mentioned above and to provide stator teeth to improve the performance of the electrical machine in which they are integrated.
  • Another object of the present invention is to provide a stator tooth for greatly simplifying the manufacture and assembly of a stator.
  • Another object of the present invention is to overcome the drawbacks mentioned above and to provide an optimized stator to improve the performance of the electrical machine in which it is integrated.
  • Another object of the present invention is to overcome the drawbacks mentioned above and to provide an electric machine, constituting for example a wheel motor, which is dimensionally optimized and in terms of its performance.
  • stator tooth for an electric machine and intended to carry a winding of an electric wire
  • said stator tooth comprising a central part formed with a joined assembly of metal sheets. pre-cut magnetic strips, said pre-cut magnetic sheets being secured to each other, characterized in that the central portion is sandwiched between two longitudinal end portions which are secured to the central portion and each traversed by a radial fixing bolt, said parts of longitudinal end having a rounded outer shape to form, at the ends of the stator tooth, a continuous contact surface for the electrical son or son (s) wound (s) on said stator tooth.
  • the electrical wire (s) has a rectangular cross section.
  • the longitudinal end portions are metallic.
  • an electric machine stator comprising a cylindrical stator yoke magnetic material, on which are fixed radially and directly stator teeth as presented above.
  • the stator yoke integrates a cooling circuit.
  • the stator yoke comprises a central portion constituting a radiator, an inlet and outlet collector for the cooling fluid mounted in an axial direction on one end of the central portion and a return collector for the fluid. cooling mounted in an axial direction on the other end of the central portion, the inlet and outlet manifold being connected to the cooling circuit.
  • the statoric yoke comprises an internal cylindrical portion and an outer cylindrical portion extending around said internal cylindrical portion delimiting between said cylindrical portions a helical cooling circuit in the form of double-pitch helix constituting a radiator, the statoric yoke also comprising an inlet and outlet collector of the cooling fluid mounted in an axial direction on one end of the cylindrical portions and in fluid communication with the double pitch propeller, the collector of input and output ensuring the input and output of the cooling fluid being connected to the cooling circuit.
  • the electric wires wound on the stator teeth comprise connection ends extending in the axial direction of said stator and connected according to a given connection diagram between phases, by the intermediate of a connecting disc axially mounted on said connection ends.
  • the electric wires wound on the stator teeth comprise connection ends extending in the axial direction of said stator are bent and / or folded to be connected to each other by brazing according to a given scheme of connection between phases.
  • the electric wires wound on the stator teeth comprise connection ends extending in the axial direction of said stator and connected according to a given phase-to-phase connection diagram, via of an insert and brazed on connection ends.
  • Such an insert is for example made of an individual electrical wire element for connecting two longitudinal ends.
  • the rotor consists of a magnetic sheet on which permanent magnets are directly attached.
  • the permanent magnets are fixed to the magnetic sheet by gluing or by any other mechanical retaining means.
  • a wheel motor characterized in that it comprises an electric machine as presented above, the rotor comprising a hub mounted free to rotate through bearing on a fixed rocket, said rotor constituting a rim having an outer face on which is mounted a tire and an inner face on which are fixed permanent magnets, the stator being intended to be integral with a fixed frame.
  • the electric machine according to the invention advantageously constitutes a wheel motor of a rail or road vehicle.
  • the removable stator tooth according to the invention has the advantage of reducing its bulk due to the use of coiled electrical wires having a rectangular cross section.
  • the load factor of the space occupied by the electric wires thus passes to 50%, whereas it is about 40%> for the coils with electrical wires of circular cross section.
  • the electric wire is wound on the stator tooth according to the invention, prior to its mounting on a stator yoke, thus greatly facilitating the winding and assembly operations.
  • stator tooth Since each stator tooth is removable, it facilitates maintenance operations. The stator teeth can thus be replaced individually. Electrical machines often include detection means that identify the stator tooth carrying the defective winding. The replacement of a stator tooth can therefore be undertaken in such a way as to reduce as much as possible the maintenance costs and the downtime of the electric machine.
  • the stator tooth according to the invention also has the advantage, thanks to the rounded end portions, of increasing the area of contact with the wound electric wire and consequently of improving the heat dissipation.
  • the use of a metal, for example copper, to make the parts Longitudinal end also contributes to better heat dissipation, particularly at the longitudinal ends of the stator teeth where the loops of the electric wire are located. This has a favorable effect on the efficiency and life of an electric machine.
  • the stator according to the invention comprising a stator yoke made of a magnetic material, has the advantage of closing directly the magnetic field lines created by the coils.
  • the stator teeth can thus be mounted directly, that is to say without intermediate magnetic part, on a stator yoke.
  • the stator according to the invention therefore has the enormous advantage of avoiding a contact between the bases of the stator teeth.
  • the stator teeth are bolted to the stator yoke in a radial direction thus ensuring excellent radial clamping and good contact with said cylinder head.
  • the risk that the magnetic field lines must pass through a layer of air, thus generating their attenuation, is therefore greatly reduced or almost zero.
  • Radial clamping ensures better contact with the stator yoke than the resulting random contact between two juxtaposed bases. This results in better performance.
  • the motor-wheel according to the invention has the advantage of generating a gain of space insofar as the permanent magnets are fixed directly on the rim and not on an intermediate piece integral with said rim. This gives a larger diameter on which the permanent magnets are positioned. The number of permanent magnets can then be higher, thus improving the performance of the motor-wheel.
  • FIG. 1 represents in section, an exemplary embodiment of a motor-wheel incorporating a stator according to the invention
  • FIG. 2 is an exploded and perspective view of an exemplary embodiment of part of a stator, called cylinder head stator, according to the invention
  • FIG. 3 is a view in section and in perspective of the stator portion of FIG. 2,
  • FIG. 4 is an exploded and perspective view of another embodiment of a part of a stator according to the invention.
  • FIG. 5 is a partially exploded view in perspective of an exemplary embodiment of a stator tooth according to the invention.
  • FIG. 6 is a partial perspective view of stator teeth according to the invention, mounted on a stator yoke,
  • FIG. 7 is a diagrammatic cross-sectional view along the line VII-VII of FIG. 5 of a stator tooth according to the invention, provided with an electric winding
  • FIGS. 7a and 7b are views. schematic, transverse and in section along the line VII-VII of Figure 5, other embodiments of the stator tooth according to the invention, provided with an electric winding
  • Figure 8 and 8a schematically illustrate the arrangement between stator teeth and the stator yoke, of a stator according to the invention, by visualizing the magnetic field lines
  • FIG. 9 is an exploded and perspective view of another embodiment of a tooth of stator according to the invention, with the winding and the insulation
  • FIG. 10 is a partial view, in section along the X-X plane, of a longitudinal end of a stator tooth of FIG.
  • Figure 11 illustrates the relative arrangement of the stator teeth on a stator according to the invention and electrical connection means relating thereto.
  • FIG. 1 represents in section, an exemplary embodiment of an electric machine according to the invention, constituting a motor-wheel integrating a stator according to the invention and stator teeth according to the invention.
  • the electric machine comprises a rotor 1, rotatably mounted on a fixed rocket 2, for example secured to a frame.
  • the rotary connection between rocket 2 and the rotor 1 is provided by any known means, in particular by means of a bearing system 3.
  • the rotor 1 is provided on an inner face 4a with permanent magnets 5.
  • the rotor 1 may constitute a rim having an outer face 4b for mounting a tire.
  • the electric machine also comprises a stator 6 having a substantially cylindrical stator yoke 7 to which stator teeth 8 are attached and fixed.
  • the stator 6 is advantageously immobilized on the fixed frame by means of immobilizing bolts, not shown. .
  • stator teeth 8 are removable and provided with a winding of electrical wires 10, shown for example in section in Figure 1.
  • the stator teeth 8 are mounted radially on the stator yoke 7 and fixed thereto via radial fixing bolts passing through said stator teeth 8 and engaged in a radial direction in said stator yoke 7.
  • FIG. 2 is an exploded and perspective view of an exemplary embodiment of a portion of the stator 6 according to the invention and more specifically of the statoric yoke 7.
  • the latter comprises a central portion 7a of substantially cylindrical shape , whose wall thickness is sufficient to machine longitudinal channels 12 for the circulation of a cooling fluid.
  • This central portion 7a thus constitutes a radiator transferring thermal energy to the cooling fluid circulating in the channels 12.
  • the stator yoke 7 also comprises an inlet and outlet manifold 13 and a return manifold 14, respectively fixed on the axial edges of the central portion 7a, for example by screwing.
  • axial bores 14a are machined in the return manifold 14 for mounting on the central portion 7a.
  • FIG. 3 is a view in section and in perspective of the part of the stator 6 illustrated in FIG.
  • the inlet and outlet manifold 13 advantageously comprises an inlet orifice 15 opening onto an inlet peripheral groove 16 which is delimited by an internal face of the inlet and outlet manifold 13 and by a substantially transverse extension 17 extending from the wall of the central portion 7a to the hub 2. Radial grooves 18 machined in the transverse extension 17 put in communication the peripheral input groove 16 with some 12a of the channels 12.
  • the inlet and outlet manifold 13 also has an outlet opening opening on a peripheral outlet groove 20 which is delimited by another internal face of the inlet and outlet manifold 13 and by a contact wall 21 intended to bear against the axial edge of the central portion 7a, on which the channels 12 open.
  • the contact wall 21 is provided with of holes 22, judiciously distributed, to put into fluid communication some 12b of the channels 12 and the output peripheral groove 20.
  • the axial end edge of the central portion 7a and the inlet and outlet manifold 13 and forms The output peripheral groove 20 is machined in the inlet and outlet manifold 13.
  • the return manifold 14 has in an area facing the axial edge of the central portion 7a on which opens the channels 12, a succession of grooves 14b each for putting in fluid communication a channel 12a and two adjacent channels 12b.
  • the channel 12a has as such a diameter twice that of the adjacent channels 12b. Referring for example to Figure 3, it is clear that the coolant thus passes through the central portion 7a in a direction A passing through a channel 12a, then crosses the central portion 7a, in the opposite direction R borrowing two 12b channels adjacent to the channel 12a and located on either side of said channel 12a.
  • the cooling circuit is of course associated with a liquid reservoir and a pump to operate in a known manner.
  • the central portion 7a and the return manifold 14 advantageously comprise tapped radial holes 23, intended for the engagement of the radial fastening bolts.
  • the stator yoke 7 comprises an internal cylindrical portion 7b and an outer cylindrical portion 7c coaxial, extending around said internal cylindrical portion 7b delimiting between said cylindrical portions a cooling circuit helical, thus constituting a radiator.
  • the helical cooling circuit is advantageously formed in the inner face of the outer cylindrical portion 7c in the form of a helical groove 7d.
  • the stator yoke 7 also comprises the inlet and outlet manifold 13a of the cooling fluid mounted in an axial direction on one end of the cylindrical portions 7b, 7c.
  • the helical cooling circuit, more precisely the helical groove 7d, is advantageously made to constitute a double pitch helix, also ensuring the return for the cooling fluid.
  • the inlet and outlet manifold 13a is connected to the cooling circuit and ensures the inlet and the outlet of the cooling fluid in the helical portion of the cooling circuit.
  • the cooling fluid circulates in one direction by taking the first step of the double pitch propeller and returns in the opposite direction by borrowing the second pitch of the double pitch propeller.
  • FIG. 5 is a partially exploded view in perspective of a tooth of a stator 8 according to the invention disposed opposite the stator yoke 7.
  • the stator tooth 8 is shown without electrical winding.
  • the stator tooth 8 comprises a central portion 24 formed with a joined assembly of pre-cut magnetic sheets 24a and secured to each other for example by welding, gluing, plastic injection or stapling.
  • the central portion 24 is sandwiched between two longitudinal end portions 25.
  • the latter are secured to the central portion 24 by welding and have a passage or a bore for the engagement of radial fastening bolts which fix the stator tooth 8 on the stator yoke 7 in a radial direction.
  • the longitudinal end portions 25 have a rounded outer shape 25a to provide a bearing surface and continuous contact for the wire 10 wound on the stator tooth 8.
  • This innovative construction improves the performance of an electric machine to the extent that these performances are related to the temperature. A decrease in the operating temperature increases the performance of the electric machine as well as its service life. Indeed, the lower the operating temperature, the less insulating materials are solicited.
  • FIG. 6 is a partial perspective view of stator teeth 8 according to the invention and mounted on a stator yoke 7.
  • the stator teeth 8 are not all represented and are devoid of electrical wires 10 for the sake of simplification of the presentation.
  • FIG. 7 is a cross-sectional view along the line VII-VII of a tooth of a stator 8 of FIG. 5, provided with a winding of electrical wires 10. Only part of the windings of the electrical wire 10 is represented.
  • the electric wire 10 advantageously has a rectangular cross section.
  • Pre-cut magnetic sheets 24a advantageously have an upstanding end 24b and a low end 24c flared between which extend the windings of the electrical wire 10.
  • the high ends 24b and low 24c advantageously have a notch 26 to receive the weld.
  • the longitudinal end portions 25 preferably have on their side intended to grip the central portion 24, a shape identical to that of the precut magnetic sheets 24a, thus facilitating the assembly of the stator tooth 8.
  • the lower ends 24c are not flared but straight.
  • the stator tooth 8 is free of foot. This form is advantageous in that it allows the winding 10 on a template, and then to engage longitudinally said coil 10 on the central portion 24 and by the lower end 24c.
  • the upper end 24b for example an assembly of sheets, is attached and fixed by any known means to the upper end 24d of the central portion 24.
  • the upper end 24b in the form of a cap, is for example secured to the central part by means of a not shown strap.
  • the electrical wires 10 wound on the stator teeth 8 comprise connection ends extending in the axial direction of the stator 6 and connected to each other according to a given phase-to-phase connection diagram, via an annular disk of FIG. connection.
  • the latter known as such, is mounted axially on the connection ends of the electrical wires 10.
  • FIGS 8 and 8a schematically illustrate the arrangement between the removable stator teeth 8 and the stator yoke 7 of a stator 6 according to the invention. These figures also schematically illustrate the magnetic field lines B passing through the wall thickness of the stator yoke 7. The heat exchange between the stator tooth 8 and the stator yoke 7 is improved for example by placing a grease between these two elements before assembly.
  • the pre-cut magnetic sheets 24a and the longitudinal end portions 25 are secured by means of a hooping tape 27, also called polyglass tape (trade name).
  • An electrical insulating structure 28 is then mounted on the stator tooth 8, thus covering the pre-cut magnetic sheets 24a and the hooping tape 27, prior to the winding of the electrical wire 10.
  • the electrical insulating structure 28 has on its longitudinal sides a longitudinal channel shape 29, closed once the electric wire 10 wound on the electrical insulating structure 28.
  • radial fixing and clamping bolts 11, intended to pass through the longitudinal end portions 25 are also illustrated in FIG. 9.
  • the ends 10a of the electrical wire 10 project from the troughs 29 in a longitudinal direction.
  • FIG. 10 is a partial view, in section along the plane XX, of a longitudinal end of a stator tooth 8 of FIG. 1. This section also corresponds to an identical section of the stator tooth 8 of FIG. 9 once assembled.
  • FIG. 11 schematically illustrates the arrangement and the relative positioning of the stator teeth 8 in the absence of the stator yoke 7.
  • the longitudinal and axial extension of the ends 10a of the electrical wires 10 allows the use and the mounting in one direction axial axis of a connection disc 30.
  • the connection disk 30 advantageously comprises connection pads 31 on which the ends 10a of the electric wires 10 will be welded.
  • the longitudinal ends 10a of the electrical wires 10 are simply bent and / or folded before being brazed together to make the interconnections of the different phases.
  • a synchronous electric machine with permanent magnets 5, for example a sinusoidal electromotive force, according to the invention, advantageously constitutes a motor-wheel.
  • the latter can equip a road or rail vehicle.
  • the innovative design of the motor-wheel according to the invention thus reduces its size and free space in said wheel. This space can then be used to house a traction inverter.
  • the electric machine according to the invention can also be used as a winch motor or as an elevator motor.

Abstract

The invention relates to a stator tooth (8) for an electrical machine, said stator tooth being intended for holding an electrical wire winding (10). Said tooth comprises a central portion (24) formed with a contiguous assembly of precut magnetic metal sheets (24a). Said metal sheets are secured to one another. Said tooth is characterized in that the central portion (24) is enclosed between two longitudinal end portions (25) which are secured to the central portion (24) and each have a radial attachment bolt (11) passing therethrough. Said longitudinal end portions (25) have a rounded outer shape (25a) for forming, on the ends of the tooth, a continuous contact surface for the electrical wire(s) wound onto said tooth.

Description

STATOR AMELIORE ET MACHINE ÉLECTRIQUE COMPORTANT UN  IMPROVED STATOR AND ELECTRIC MACHINE COMPRISING ONE
TEL STATOR  TEL STATOR
Domaine technique Technical area
La présente invention se rapporte au domaine technique général des moteurs électriques et plus généralement des machines synchrones comportant des moyens pour générer une induction magnétique.  The present invention relates to the general technical field of electric motors and more generally synchronous machines comprising means for generating a magnetic induction.
La présente invention concerne plus particulièrement une machine électrique, par exemple une machine synchrone à force électromotrice sinusoïdale ou autre, alimentée par une tension alternative polyphasée.  The present invention relates more particularly to an electric machine, for example a synchronous machine with sinusoidal or other electromotive force, fed by a polyphase alternating voltage.
L'invention sera décrite ci-après plus particulièrement mais non limitativement avec des moyens pour générer une induction magnétique constitués à titre d'exemple de réalisation, d'aimants permanents. La machine électrique constitue par exemple un moteur-roue.  The invention will be described hereinafter more particularly, but not exclusively, with means for generating a magnetic induction constituted by an exemplary embodiment of permanent magnets. The electric machine is for example a wheel motor.
Une machine électrique à aimants permanents est en général constituée d'un stator bobiné et d'un rotor portant les aimants permanents et s 'étendant autour dudit stator. Une telle machine électrique est alimentée et pilotée par l'intermédiaire d'une électronique de puissance.  An electric machine with permanent magnets is generally constituted by a wound stator and a rotor carrying the permanent magnets and extending around said stator. Such an electric machine is powered and driven via a power electronics.
Une machine électrique à aimants permanents et à force électromotrice sinusoïdale, peut être pilotée avec un système de commande vectorielle. Ce type de pilotage, connu en tant que tel, permet d'obtenir des performances élevées à savoir, une grande précision et une dynamique de couple élevée. Ces performances sont nécessaires, en particulier pour les moteurs de traction.  An electric machine with permanent magnets and sinusoidal electromotive force can be controlled with a vector control system. This type of control, known as such, provides high performance, namely high accuracy and high torque dynamics. These performances are necessary, especially for traction motors.
On connaît également des machines électriques dont le stator, incluant les dents de stator, est réalisé avec un assemblage jointif de tôles. Un tel stator, une fois assemblé, nécessite un positionnement précis pour réaliser le bobinage de chaque dent. Ces opérations de bobinage sont difficiles à mettre en œuvre et prennent beaucoup de temps. En outre, le remplacement d'un bobinage défectueux d'une dent se heurte aux mêmes difficultés.  Electric machines are also known whose stator, including the stator teeth, is made with a joined assembly of sheets. Such a stator, once assembled, requires precise positioning to perform the winding of each tooth. These winding operations are difficult to implement and take a long time. In addition, the replacement of a defective winding of a tooth faces the same difficulties.
Par ailleurs, dans d'autres machines synchrones connues, les dents de stator montées radialement sur une culasse statorique, présentent à leur extrémité en contact avec la culasse statorique, une base relativement épaisse pour canaliser les lignes de champ magnétique. Ces bases doivent toutes être en contact afin d'éviter de faire passer les lignes de champ magnétique dans l'air. Or les tolérances dimensionnelles observées sur les dents de stator rendent très aléatoire un tel contact entre les bases. Ce problème est d'autant plus important que le nombre de dents de stator montées sur la culasse statorique est élevé. Ceci risque d'atténuer les lignes de champ magnétique et par conséquent d'altérer les performances de ces machines synchrones. Divulgation de l'invention Moreover, in other known synchronous machines, the stator teeth mounted radially on a stator yoke, have at their end in contact with the stator yoke, a relatively thick base for channeling the magnetic field lines. These bases must all be in contact in order to avoid passing the magnetic field lines in the air. However, the dimensional tolerances observed on the stator teeth make such contact between the bases very random. This problem is all the more important as the number of stator teeth mounted on the stator yoke is high. This may attenuate the magnetic field lines and therefore affect the performance of these synchronous machines. Disclosure of the invention
L'objet de la présente invention vise par conséquent à remédier aux inconvénients mentionnés ci-dessus et à fournir des dents de stator permettant d'améliorer les performances de la machine électrique dans laquelle elles sont intégrées.  The object of the present invention is therefore to overcome the disadvantages mentioned above and to provide stator teeth to improve the performance of the electrical machine in which they are integrated.
Un autre objet de la présente invention vise à proposer une dent de stator permettant de simplifier grandement la fabrication et l'assemblage d'un stator.  Another object of the present invention is to provide a stator tooth for greatly simplifying the manufacture and assembly of a stator.
Un autre objet de la présente invention vise à remédier aux inconvénients mentionnés ci-dessus et à fournir un stator optimisé permettant d'améliorer les performances de la machine électrique dans laquelle il est intégré.  Another object of the present invention is to overcome the drawbacks mentioned above and to provide an optimized stator to improve the performance of the electrical machine in which it is integrated.
Un autre objet de la présente invention vise à remédier aux inconvénients mentionnés ci-dessus et à proposer une machine électrique, constituant par exemple un moteur-roue, laquelle est optimisée dimensionnellement et au niveau de ses performances.  Another object of the present invention is to overcome the drawbacks mentioned above and to provide an electric machine, constituting for example a wheel motor, which is dimensionally optimized and in terms of its performance.
Les objets assignés à l'invention sont atteints à l'aide d'une dent de stator amovible pour machine électrique et destinée à porter un enroulement d'un fil électrique, ladite dent de stator comportant une partie centrale formée avec un assemblage jointif de tôles magnétiques prédécoupées, lesdites tôles magnétiques prédécoupées étant solidarisées entre-elles, caractérisée en ce que la partie centrale est enserrée entre deux parties d'extrémité longitudinale lesquelles sont solidarisées à la partie centrale et traversées chacune par un boulon de fixation radiale, lesdites parties d'extrémité longitudinale présentant une forme extérieure arrondie pour constituer, au niveau des extrémités de la dent de stator, une surface de contact continue pour le ou les fils électrique(s) enroulé(s) sur ladite dent de stator.  The objects assigned to the invention are achieved by means of a removable stator tooth for an electric machine and intended to carry a winding of an electric wire, said stator tooth comprising a central part formed with a joined assembly of metal sheets. pre-cut magnetic strips, said pre-cut magnetic sheets being secured to each other, characterized in that the central portion is sandwiched between two longitudinal end portions which are secured to the central portion and each traversed by a radial fixing bolt, said parts of longitudinal end having a rounded outer shape to form, at the ends of the stator tooth, a continuous contact surface for the electrical son or son (s) wound (s) on said stator tooth.
Selon un exemple de réalisation de la dent de stator conforme à l'invention, le(s) fil(s) électrique(s) présente(nt) une section transversale rectangulaire.  According to an exemplary embodiment of the stator tooth according to the invention, the electrical wire (s) has a rectangular cross section.
Selon un exemple de réalisation de la dent de stator conforme à l'invention, les parties d'extrémité longitudinale sont métalliques.  According to an exemplary embodiment of the stator tooth according to the invention, the longitudinal end portions are metallic.
Les objets assignés à l'invention sont également atteints à l'aide d'un stator pour machine électrique comportant une culasse statorique cylindrique en matériau magnétique, sur laquelle sont fixées radialement et directement des dents de stator telles que présentées ci-dessus. The objects assigned to the invention are also achieved by means of an electric machine stator comprising a cylindrical stator yoke magnetic material, on which are fixed radially and directly stator teeth as presented above.
Selon un exemple de réalisation du stator conforme à l'invention, la culasse statorique intègre un circuit de refroidissement.  According to an exemplary embodiment of the stator according to the invention, the stator yoke integrates a cooling circuit.
A titre d'exemple, la culasse statorique comprend une portion centrale constituant un radiateur, un collecteur d'entrée et de sortie du fluide de refroidissement monté selon une direction axiale sur une extrémité de la portion centrale et un collecteur de retour pour le fluide de refroidissement monté selon une direction axiale sur l'autre extrémité de la portion centrale, le collecteur d'entrée et de sortie étant relié au circuit de refroidissement.  By way of example, the stator yoke comprises a central portion constituting a radiator, an inlet and outlet collector for the cooling fluid mounted in an axial direction on one end of the central portion and a return collector for the fluid. cooling mounted in an axial direction on the other end of the central portion, the inlet and outlet manifold being connected to the cooling circuit.
Selon un autre exemple de réalisation du stator conforme à l'invention, la culasse statorique comprend une portion cylindrique interne et une portion cylindrique externe s'étendant autour de ladite portion cylindrique interne en délimitant entre lesdites portions cylindriques un circuit de refroidissement hélicoïdal sous forme d'hélice double pas constituant un radiateur, la culasse statorique comprenant également un collecteur d'entrée et de sortie du fluide de refroidissement monté selon une direction axiale sur une extrémité des portions cylindriques et en communication fluidique avec l'hélice double pas, le collecteur d'entrée et de sortie assurant l'entrée et la sortie du fluide de refroidissement étant relié au circuit de refroidissement.  According to another exemplary embodiment of the stator according to the invention, the statoric yoke comprises an internal cylindrical portion and an outer cylindrical portion extending around said internal cylindrical portion delimiting between said cylindrical portions a helical cooling circuit in the form of double-pitch helix constituting a radiator, the statoric yoke also comprising an inlet and outlet collector of the cooling fluid mounted in an axial direction on one end of the cylindrical portions and in fluid communication with the double pitch propeller, the collector of input and output ensuring the input and output of the cooling fluid being connected to the cooling circuit.
Selon un exemple de réalisation du stator conforme à l'invention, les fils électriques enroulés sur les dents de stator comportent des extrémités de raccordement s'étendant selon la direction axiale dudit stator et raccordés selon un schéma donné de connexion entre phases, par l'intermédiaire d'un disque de raccordement monté axialement sur lesdites extrémités de raccordement.  According to an exemplary embodiment of the stator according to the invention, the electric wires wound on the stator teeth comprise connection ends extending in the axial direction of said stator and connected according to a given connection diagram between phases, by the intermediate of a connecting disc axially mounted on said connection ends.
Selon un autre mode de réalisation conforme à l'invention, les fils électriques enroulés sur les dents de stator comportent des extrémités de raccordement s'étendant selon la direction axiale dudit stator sont cintrées et/ou repliées pour être raccordées entre elles par brasage selon un schéma donné de connexion entre phases.  According to another embodiment according to the invention, the electric wires wound on the stator teeth comprise connection ends extending in the axial direction of said stator are bent and / or folded to be connected to each other by brazing according to a given scheme of connection between phases.
Selon un autre mode de réalisation conforme à l'invention, les fils électriques enroulés sur les dents de stator comportent des extrémités de raccordement s'étendant selon la direction axiale dudit stator et raccordés selon un schéma donné de connexion entre phases, par l'intermédiaire d'une pièce rapportée et brasée sur des extrémités de raccordement. Une telle pièce rapportée est par exemple constituée d'un élément de fil électrique individuel, destiné à relier deux extrémités longitudinales. Les objets assignés à l'invention sont également atteints à l'aide d'une machine électrique comportant un rotor s'étendant autour d'un stator tel que présenté ci-dessus. According to another embodiment according to the invention, the electric wires wound on the stator teeth comprise connection ends extending in the axial direction of said stator and connected according to a given phase-to-phase connection diagram, via of an insert and brazed on connection ends. Such an insert is for example made of an individual electrical wire element for connecting two longitudinal ends. The objects assigned to the invention are also achieved by means of an electric machine comprising a rotor extending around a stator as presented above.
Selon un exemple de réalisation de la machine électrique conforme à l'invention, le rotor est constitué d'une tôle magnétique sur laquelle sont fixés directement des aimants permanents.  According to an exemplary embodiment of the electrical machine according to the invention, the rotor consists of a magnetic sheet on which permanent magnets are directly attached.
A titre d'exemple, les aimants permanents sont fixés sur la tôle magnétique par collage ou par tout autre moyen de retenue mécanique.  By way of example, the permanent magnets are fixed to the magnetic sheet by gluing or by any other mechanical retaining means.
Les objets assignés à l'invention sont également atteints à l'aide d'un moteur-roue caractérisé en ce qu'il comprend une machine électrique telle que présentée ci-dessus, le rotor comportant un moyeu monté libre en rotation par l'intermédiaire de roulements sur une fusée fixe, ledit rotor constituant une jante présentant une face extérieure sur laquelle est montée un pneu et une face intérieure sur laquelle sont fixés les aimants permanents, le stator étant destiné à être solidaire d'un châssis fixe.  The objects assigned to the invention are also achieved by means of a wheel motor characterized in that it comprises an electric machine as presented above, the rotor comprising a hub mounted free to rotate through bearing on a fixed rocket, said rotor constituting a rim having an outer face on which is mounted a tire and an inner face on which are fixed permanent magnets, the stator being intended to be integral with a fixed frame.
La machine électrique conforme à l'invention constitue avantageusement un moteur-roue d'un véhicule ferroviaire ou routier.  The electric machine according to the invention advantageously constitutes a wheel motor of a rail or road vehicle.
La dent de stator amovible conforme à l'invention présente l'avantage de réduire son encombrement grâce à l'utilisation de fils électriques bobinés présentant une section transversale rectangulaire. Le coefficient de remplissage de l'espace occupé par les fils électriques passe ainsi à 50%, alors qu'il est d'environ 40%> pour les bobinages avec de fils électriques de section transversale circulaire.  The removable stator tooth according to the invention has the advantage of reducing its bulk due to the use of coiled electrical wires having a rectangular cross section. The load factor of the space occupied by the electric wires thus passes to 50%, whereas it is about 40%> for the coils with electrical wires of circular cross section.
Le fil électrique est enroulé sur la dent de stator conforme à l'invention, au préalable de son montage sur une culasse statorique, facilitant ainsi grandement les opérations de bobinage et d'assemblage.  The electric wire is wound on the stator tooth according to the invention, prior to its mounting on a stator yoke, thus greatly facilitating the winding and assembly operations.
Dans la mesure où chaque dent de stator est amovible, on facilite les opérations de maintenance. Les dents de stator peuvent ainsi être remplacées individuellement. Les machines électriques comprennent souvent des moyens de détection qui permettent d'identifier la dent de stator portant le bobinage défectueux. Le remplacement d'une dent de stator peut donc être entrepris de façon à réduire au mieux les frais de maintenance et le temps d'immobilisation de la machine électrique.  Since each stator tooth is removable, it facilitates maintenance operations. The stator teeth can thus be replaced individually. Electrical machines often include detection means that identify the stator tooth carrying the defective winding. The replacement of a stator tooth can therefore be undertaken in such a way as to reduce as much as possible the maintenance costs and the downtime of the electric machine.
La dent de stator conforme à l'invention présente également l'avantage grâce aux parties d'extrémité arrondies, d'augmenter la surface de contact avec le fil électrique enroulé et par conséquent d'améliorer l'évacuation de la chaleur. L'utilisation d'un métal, par exemple le cuivre, pour réaliser les parties d'extrémité longitudinale contribue également à une meilleure évacuation de la chaleur en particulier aux extrémités longitudinales des dents de stator où se trouvent les boucles du fil électrique. Ceci influence favorablement le rendement et la durée de vie d'une machine électrique. The stator tooth according to the invention also has the advantage, thanks to the rounded end portions, of increasing the area of contact with the wound electric wire and consequently of improving the heat dissipation. The use of a metal, for example copper, to make the parts Longitudinal end also contributes to better heat dissipation, particularly at the longitudinal ends of the stator teeth where the loops of the electric wire are located. This has a favorable effect on the efficiency and life of an electric machine.
Le stator conforme à l'invention, comportant une culasse statorique réalisée dans un matériau magnétique, présente l'avantage de fermer directement les lignes de champ magnétique créées par les bobinages. Les dents de stator peuvent ainsi être montées directement, c'est-à-dire sans pièce magnétique intermédiaire, sur une culasse statorique. Dans la mesure où les lignes de champ magnétique sont fermées grâce à la culasse statorique, il n'est plus nécessaire de réaliser des dents de stator comportant des bases massives et jointives. Ceci permet également de réduire la hauteur, dans une direction radiale, des dents de stator. Ces dernières, plus courtes, permettent de diminuer la longueur des trajectoires des lignes de champ et par conséquent de diminuer les pertes de la machine électrique.  The stator according to the invention, comprising a stator yoke made of a magnetic material, has the advantage of closing directly the magnetic field lines created by the coils. The stator teeth can thus be mounted directly, that is to say without intermediate magnetic part, on a stator yoke. Insofar as the magnetic field lines are closed thanks to the stator yoke, it is no longer necessary to make stator teeth having massive and contiguous bases. This also makes it possible to reduce the height, in a radial direction, of the stator teeth. The latter, shorter, reduce the length of the trajectories of the field lines and therefore reduce the losses of the electric machine.
Le stator conforme à l'invention présente donc l'énorme avantage de s'affranchir d'un contact entre les bases des dents de stator. En effet, les dents de stator sont boulonnées sur la culasse statorique selon une direction radiale assurant ainsi un excellent serrage radial et un bon contact avec ladite culasse. Le risque que les lignes de champ magnétique doivent traverser une couche d'air, générant ainsi leur atténuation, est donc très largement diminué ou quasi nul. Le serrage radial assure un meilleur contact avec la culasse statorique que le contact aléatoire résultant entre deux bases juxtaposées. Il en résulte un meilleur rendement.  The stator according to the invention therefore has the enormous advantage of avoiding a contact between the bases of the stator teeth. Indeed, the stator teeth are bolted to the stator yoke in a radial direction thus ensuring excellent radial clamping and good contact with said cylinder head. The risk that the magnetic field lines must pass through a layer of air, thus generating their attenuation, is therefore greatly reduced or almost zero. Radial clamping ensures better contact with the stator yoke than the resulting random contact between two juxtaposed bases. This results in better performance.
En outre, le moteur-roue conforme à l'invention présente l'avantage de générer un gain d'espace dans la mesure où les aimants permanent sont fixés directement sur la jante et non sur une pièce intermédiaire solidaire de ladite jante. On obtient ainsi un diamètre plus grand sur lequel sont positionnés les aimants permanents. Le nombre d'aimants permanents peut alors être plus élevé, améliorant ainsi les performances du moteur-roue.  In addition, the motor-wheel according to the invention has the advantage of generating a gain of space insofar as the permanent magnets are fixed directly on the rim and not on an intermediate piece integral with said rim. This gives a larger diameter on which the permanent magnets are positioned. The number of permanent magnets can then be higher, thus improving the performance of the motor-wheel.
D'autres caractéristiques et avantages de l'invention ressortiront également des dessins donnés à titre d'exemples illustratifs et non limitatifs dans lesquels :  Other characteristics and advantages of the invention will also emerge from the drawings given by way of illustrative and non-limiting examples in which:
la figure 1 représente en coupe, un exemple de réalisation d'un moteur-roue intégrant un stator conforme à l'invention, la figure 2 est une vue en éclaté et en perspective d'un exemple de réalisation d'une partie d'un stator, appelée culasse statorique, conforme à l'invention, FIG. 1 represents in section, an exemplary embodiment of a motor-wheel incorporating a stator according to the invention, FIG. 2 is an exploded and perspective view of an exemplary embodiment of part of a stator, called cylinder head stator, according to the invention,
la figure 3 est un vue en coupe et en perspective de la partie de stator de la figure 2,  FIG. 3 is a view in section and in perspective of the stator portion of FIG. 2,
la figure 4 est une vue en éclaté et en perspective d'un autre exemple de réalisation d'une partie d'un stator conforme à l'invention,  FIG. 4 is an exploded and perspective view of another embodiment of a part of a stator according to the invention,
la figure 5 est une vue partiellement éclatée et en perspective d'exemple de réalisation d'une dent de stator conforme à l'invention,  FIG. 5 is a partially exploded view in perspective of an exemplary embodiment of a stator tooth according to the invention,
la figure 6 est une vue partielle en perspective de dents de stator conformes à l'invention, montées sur une culasse statorique,  FIG. 6 is a partial perspective view of stator teeth according to the invention, mounted on a stator yoke,
la figure 7 est une vue schématique, transversale et en coupe selon la ligne VII-VII de la figure 5, d'une dent de stator conforme à l'invention, pourvue d'un bobinage électrique, les figures 7a et 7b sont des vues schématiques, transversales et en coupe selon la ligne VII-VII de la figure 5, d'autres exemples de réalisation de la dent de stator conforme à l'invention, pourvue d'un bobinage électrique, la figure 8 et 8a illustrent schématiquement l'agencement entre des dents stator et la culasse statorique, d'un stator conforme à l'invention, en visualisant les lignes de champ magnétique, la figure 9 est une vue éclatée et en perspective d'un autre exemple de réalisation d'une dent de stator conforme à l'invention, avec le bobinage et l'isolation,  FIG. 7 is a diagrammatic cross-sectional view along the line VII-VII of FIG. 5 of a stator tooth according to the invention, provided with an electric winding, FIGS. 7a and 7b are views. schematic, transverse and in section along the line VII-VII of Figure 5, other embodiments of the stator tooth according to the invention, provided with an electric winding, Figure 8 and 8a schematically illustrate the arrangement between stator teeth and the stator yoke, of a stator according to the invention, by visualizing the magnetic field lines, FIG. 9 is an exploded and perspective view of another embodiment of a tooth of stator according to the invention, with the winding and the insulation,
la figure 10 est une vue partielle, en coupe selon le plan X-X, d'une extrémité longitudinale d'une dent de stator de la figure FIG. 10 is a partial view, in section along the X-X plane, of a longitudinal end of a stator tooth of FIG.
1, et 1, and
la figure 11 illustre l'agencement relatif des dents de stator sur un stator conforme à l'invention et des moyens de connexion électrique s'y rapportant.  Figure 11 illustrates the relative arrangement of the stator teeth on a stator according to the invention and electrical connection means relating thereto.
Description détaillée des figures Detailed description of the figures
La figure 1 représente en coupe, un exemple de réalisation d'une machine électrique conforme à l'invention, constituant un moteur-roue intégrant un stator conforme à l'invention et des dents de stator conformes à l'invention.  FIG. 1 represents in section, an exemplary embodiment of an electric machine according to the invention, constituting a motor-wheel integrating a stator according to the invention and stator teeth according to the invention.
La machine électrique comprend un rotor 1, monté rotatif sur une fusée 2 fixe, par exemple solidaire d'un châssis. La liaison rotative entre la fusée 2 et le rotor 1 est assurée par tous moyens connus, notamment grâce à un système de roulements 3. Le rotor 1 est pourvu sur une face intérieure 4a d'aimants permanents 5. Avantageusement, dans le cas d'un moteur-roue, le rotor 1 peut constituer une jante présentant une face extérieure 4b destinée au montage d'un pneu. The electric machine comprises a rotor 1, rotatably mounted on a fixed rocket 2, for example secured to a frame. The rotary connection between rocket 2 and the rotor 1 is provided by any known means, in particular by means of a bearing system 3. The rotor 1 is provided on an inner face 4a with permanent magnets 5. Advantageously, in the case of a motor-wheel, the rotor 1 may constitute a rim having an outer face 4b for mounting a tire.
La machine électrique comprend également un stator 6 présentant une culasse statorique 7, sensiblement cylindrique, sur laquelle sont rapportées et fixées des dents de stator 8. Le stator 6 est avantageusement immobilisé sur le châssis fixe par l'intermédiaire de boulons d'immobilisation non représentés.  The electric machine also comprises a stator 6 having a substantially cylindrical stator yoke 7 to which stator teeth 8 are attached and fixed. The stator 6 is advantageously immobilized on the fixed frame by means of immobilizing bolts, not shown. .
Les dents de stator 8 sont amovibles et pourvues d'un bobinage de fils électriques 10, montré par exemple en coupe à la figure 1. Les dents de stator 8 sont montées radialement sur la culasse statorique 7 et fixées sur cette dernière par l'intermédiaire de boulons de fixation radiale traversant lesdites dents de stator 8 et engagés selon une direction radiale dans ladite culasse statorique 7.  The stator teeth 8 are removable and provided with a winding of electrical wires 10, shown for example in section in Figure 1. The stator teeth 8 are mounted radially on the stator yoke 7 and fixed thereto via radial fixing bolts passing through said stator teeth 8 and engaged in a radial direction in said stator yoke 7.
La figure 2 est une vue en éclaté et en perspective d'un exemple de réalisation d'une partie du stator 6 conforme à l'invention et plus précisément de la culasse statorique 7. Cette dernière comporte une portion centrale 7a, de forme sensiblement cylindrique, dont l'épaisseur de paroi est suffisante pour y usiner des canaux 12 longitudinaux, servant à la circulation d'un fluide de refroidissement. Cette portion centrale 7a constitue donc un radiateur transférant de l'énergie thermique au fluide de refroidissement circulant dans les canaux 12.  FIG. 2 is an exploded and perspective view of an exemplary embodiment of a portion of the stator 6 according to the invention and more specifically of the statoric yoke 7. The latter comprises a central portion 7a of substantially cylindrical shape , whose wall thickness is sufficient to machine longitudinal channels 12 for the circulation of a cooling fluid. This central portion 7a thus constitutes a radiator transferring thermal energy to the cooling fluid circulating in the channels 12.
La culasse statorique 7 comporte également un collecteur d'entrée et de sortie 13 ainsi qu'un collecteur de retour 14, fixés respectivement sur les chants axiaux de la portion centrale 7a, par exemple par vissage. Des alésages axiaux 14a sont par exemple usinés dans le collecteur de retourl4 à des fins de montage sur la portion centrale 7a.  The stator yoke 7 also comprises an inlet and outlet manifold 13 and a return manifold 14, respectively fixed on the axial edges of the central portion 7a, for example by screwing. For example, axial bores 14a are machined in the return manifold 14 for mounting on the central portion 7a.
La figure 3 est une vue en coupe et en perspective de la partie du stator 6 illustrée à la figure 2.  FIG. 3 is a view in section and in perspective of the part of the stator 6 illustrated in FIG.
Le collecteur d'entrée et de sortie 13 comporte avantageusement un orifice d'entrée 15 débouchant sur une gorge périphérique d'entrée 16 laquelle est délimitée par une face interne du collecteur d'entrée et de sortie 13 et par une extension sensiblement transversale 17 s'étendant de la paroi de la portion centrale 7a vers le moyeu 2. Des rainures radiales 18 usinées dans l'extension transversale 17 mettent en communication la gorge périphérique d'entrée 16 avec certains 12a des canaux 12.  The inlet and outlet manifold 13 advantageously comprises an inlet orifice 15 opening onto an inlet peripheral groove 16 which is delimited by an internal face of the inlet and outlet manifold 13 and by a substantially transverse extension 17 extending from the wall of the central portion 7a to the hub 2. Radial grooves 18 machined in the transverse extension 17 put in communication the peripheral input groove 16 with some 12a of the channels 12.
Le collecteur d'entrée et de sortie 13 comporte également un orifice de sortie débouchant sur une gorge périphérique de sortie 20 laquelle est délimitée par une autre face interne du collecteur d'entrée et de sortie 13 et par une paroi de contact 21 destinée à venir en appui contre le chant axial de la portion centrale 7a, sur lequel débouchent les canaux 12. La paroi de contact 21 est pourvue de perçages 22, judicieusement répartis, pour mettre en communication fluidique certains 12b des canaux 12 et la gorge périphérique de sortie 20. Le chant axial d'extrémité de la portion centrale 7a et le collecteur d'entrée et de sortie 13 présente ainsi des formes complémentaires pour former la gorge périphérique d'entrée 16. La gorge périphérique de sortie 20 est usinée dans le collecteur d'entrée et de sortie 13. The inlet and outlet manifold 13 also has an outlet opening opening on a peripheral outlet groove 20 which is delimited by another internal face of the inlet and outlet manifold 13 and by a contact wall 21 intended to bear against the axial edge of the central portion 7a, on which the channels 12 open. The contact wall 21 is provided with of holes 22, judiciously distributed, to put into fluid communication some 12b of the channels 12 and the output peripheral groove 20. The axial end edge of the central portion 7a and the inlet and outlet manifold 13 and forms The output peripheral groove 20 is machined in the inlet and outlet manifold 13.
Le collecteur de retour 14 présente dans une zone en regard du chant axial de la portion centrale 7a sur lequel débouche les canaux 12, une succession de rainures 14b permettant chacune de mettre en communication fluidique un canal 12a et deux canaux 12b adjacents. Le canal 12a présente à ce titre un diamètre double de celui des canaux 12b adjacents. En se reportant par exemple à la figure 3, il apparaît clairement que le liquide de refroidissement traverse ainsi la portion centrale 7a selon un sens A en passant dans un canal 12a, puis traverse à nouveau la portion centrale 7a, en sens inverse R en empruntant deux canaux 12b adjacents au canal 12a et situés de part et d'autre dudit canal 12a.  The return manifold 14 has in an area facing the axial edge of the central portion 7a on which opens the channels 12, a succession of grooves 14b each for putting in fluid communication a channel 12a and two adjacent channels 12b. The channel 12a has as such a diameter twice that of the adjacent channels 12b. Referring for example to Figure 3, it is clear that the coolant thus passes through the central portion 7a in a direction A passing through a channel 12a, then crosses the central portion 7a, in the opposite direction R borrowing two 12b channels adjacent to the channel 12a and located on either side of said channel 12a.
Le circuit de refroidissement est bien entendu associé à un réservoir de liquide et à une pompe pour fonctionner de manière connue.  The cooling circuit is of course associated with a liquid reservoir and a pump to operate in a known manner.
La portion centrale 7a et le collecteur de retour 14 comportent avantageusement des trous radiaux taraudés 23, destinés à l'engagement des boulons de fixation radiale.  The central portion 7a and the return manifold 14 advantageously comprise tapped radial holes 23, intended for the engagement of the radial fastening bolts.
Dans un autre exemple de réalisation illustré à la figure 4, la culasse statorique 7 comprend une portion cylindrique interne 7b et une portion cylindrique externe 7c coaxiale, s'étendant autour de ladite portion cylindrique interne 7b en délimitant entre lesdites portions cylindriques un circuit de refroidissement hélicoïdal, constituant ainsi un radiateur. Le circuit de refroidissement hélicoïdal est avantageusement ménagé dans la face interne de la portion cylindrique externe 7c sous forme de rainure hélicoïdale 7d. La culasse statorique 7 comprenant également le collecteur d'entrée et de sortie 13a du fluide de refroidissement monté selon une direction axiale sur une extrémité des portions cylindriques 7b, 7c. Le circuit de refroidissement hélicoïdal, plus précisément la rainure hélicoïdale 7d, est avantageusement réalisée pour constituer une hélice double pas, assurant également le retour pour le fluide de refroidissement. Le collecteur d'entrée et de sortie 13a est relié au circuit de refroidissement et assure l'entrée et la sortie du fluide de refroidissement dans la portion hélicoïdale du circuit de refroidissement. Le fluide de refroidissement circule donc dans un sens en empruntant le premier pas de l'hélice double pas et revient en sens opposé en empruntant le second pas de l'hélice double pas. In another exemplary embodiment illustrated in FIG. 4, the stator yoke 7 comprises an internal cylindrical portion 7b and an outer cylindrical portion 7c coaxial, extending around said internal cylindrical portion 7b delimiting between said cylindrical portions a cooling circuit helical, thus constituting a radiator. The helical cooling circuit is advantageously formed in the inner face of the outer cylindrical portion 7c in the form of a helical groove 7d. The stator yoke 7 also comprises the inlet and outlet manifold 13a of the cooling fluid mounted in an axial direction on one end of the cylindrical portions 7b, 7c. The helical cooling circuit, more precisely the helical groove 7d, is advantageously made to constitute a double pitch helix, also ensuring the return for the cooling fluid. The inlet and outlet manifold 13a is connected to the cooling circuit and ensures the inlet and the outlet of the cooling fluid in the helical portion of the cooling circuit. The cooling fluid circulates in one direction by taking the first step of the double pitch propeller and returns in the opposite direction by borrowing the second pitch of the double pitch propeller.
La figure 5 est une vue partiellement éclatée et en perspective d'une dent d'un stator 8 conforme à l'invention disposée en regard de la culasse statorique 7. La dent de stator 8 est représentée sans bobinage électrique. La dent statorique 8 comporte une partie centrale 24 formée avec un assemblage jointif de tôles magnétiques prédécoupées 24a et solidarisées entre-elles par exemple par soudage, collage, injection plastique ou agrafage.  Figure 5 is a partially exploded view in perspective of a tooth of a stator 8 according to the invention disposed opposite the stator yoke 7. The stator tooth 8 is shown without electrical winding. The stator tooth 8 comprises a central portion 24 formed with a joined assembly of pre-cut magnetic sheets 24a and secured to each other for example by welding, gluing, plastic injection or stapling.
La partie centrale 24 est enserrée entre deux parties d'extrémité longitudinale 25. Ces dernières sont solidarisées à la partie centrale 24 par soudage et présentent un passage ou un perçage pour l'engagement de boulons de fixation radiale lesquels fixent la dent de stator 8 sur la culasse statorique 7 selon une direction radiale.  The central portion 24 is sandwiched between two longitudinal end portions 25. The latter are secured to the central portion 24 by welding and have a passage or a bore for the engagement of radial fastening bolts which fix the stator tooth 8 on the stator yoke 7 in a radial direction.
Les parties d'extrémité longitudinale 25 présentent une forme extérieure arrondie 25a pour constituer une surface d'appui et de contact continue pour le fil électrique 10 enroulé sur la dent de stator 8. Les enroulements du fil électrique 10 sur la dent de stator 8, et notamment les enroulements constituant la première couche, laquelle est en contact avec la partie centrale 24 via un isolant électrique, restent en contact avec les formes extérieures arrondies 25 a aux extrémités de la dent de stator 8. Ceci favorise de manière significative l'échange thermique avec la culasse statorique 7. Une telle construction novatrice permet d'améliorer les performances d'une machine électrique dans la mesure où ces performances sont liées à la température. Une diminution de la température de fonctionnement augmente les performances de la machine électrique ainsi que sa durée de vie. En effet, plus la température de fonctionnement est basse, moins les matériaux isolants sont sollicités.  The longitudinal end portions 25 have a rounded outer shape 25a to provide a bearing surface and continuous contact for the wire 10 wound on the stator tooth 8. The windings of the wire 10 on the stator tooth 8, and in particular the windings constituting the first layer, which is in contact with the central portion 24 via an electrical insulator, remain in contact with the rounded outer shapes 25a at the ends of the stator tooth 8. This significantly promotes the exchange This innovative construction improves the performance of an electric machine to the extent that these performances are related to the temperature. A decrease in the operating temperature increases the performance of the electric machine as well as its service life. Indeed, the lower the operating temperature, the less insulating materials are solicited.
La figure 6 est une vue partielle et en perspective de dents de stator 8 conformes à l'invention et montées sur une culasse statorique 7. Les dents de stator 8 ne sont pas toutes représentées et sont dépourvues de fils électriques 10 pour des raisons de simplification de la présentation.  FIG. 6 is a partial perspective view of stator teeth 8 according to the invention and mounted on a stator yoke 7. The stator teeth 8 are not all represented and are devoid of electrical wires 10 for the sake of simplification of the presentation.
La figure 7 est une vue transversale et en coupe selon la ligne VII- VII d'une dent d'un stator 8 de la figure 5, pourvue d'un bobinage de fils électriques 10. Une partie seulement des enroulements du fil électrique 10 est représentée. Le fil électrique 10 présente avantageusement une section transversale rectangulaire. Les tôles magnétiques prédécoupées 24a présentent avantageusement une extrémité haute 24b et une extrémité basse 24c évasées entre lesquelles s'étendent les enroulements du fil électrique 10. Les extrémités haute 24b et basse 24c présentent avantageusement une encoche 26 pour recevoir la soudure. Les parties d'extrémité longitudinale 25 présentent, de préférence, sur leur côté destiné à enserrer la partie centrale 24, une forme identique à celle des tôles magnétiques prédécoupées 24a, facilitant ainsi l'assemblage de la dent statorique 8. FIG. 7 is a cross-sectional view along the line VII-VII of a tooth of a stator 8 of FIG. 5, provided with a winding of electrical wires 10. Only part of the windings of the electrical wire 10 is represented. The electric wire 10 advantageously has a rectangular cross section. Pre-cut magnetic sheets 24a advantageously have an upstanding end 24b and a low end 24c flared between which extend the windings of the electrical wire 10. The high ends 24b and low 24c advantageously have a notch 26 to receive the weld. The longitudinal end portions 25 preferably have on their side intended to grip the central portion 24, a shape identical to that of the precut magnetic sheets 24a, thus facilitating the assembly of the stator tooth 8.
Dans les exemples de réalisation illustrés aux figures 7a et 7b, les extrémités basses 24c ne sont pas évasées mais droites. La dent de stator 8 est donc dépourvue de pied. Cette forme est avantageuse dans la mesure où elle permet de faire le bobinage 10 sur un gabarit, puis d'engager longitudinalement ledit bobinage 10 sur la partie centrale 24 et ce par l'extrémité basse 24c.  In the exemplary embodiments illustrated in FIGS. 7a and 7b, the lower ends 24c are not flared but straight. The stator tooth 8 is free of foot. This form is advantageous in that it allows the winding 10 on a template, and then to engage longitudinally said coil 10 on the central portion 24 and by the lower end 24c.
Dans l'exemple de réalisation de la figure 7b, l'extrémité haute 24b, par exemple un assemblage de tôles, est rapportée et fixée par tous moyens connus, sur l'extrémité supérieure 24d de la partie centrale 24. L'extrémité haute 24b, sous forme de chapeau, est par exemple solidarisée à la partie centrale par l'intermédiaire d'une sangle non représentée.  In the embodiment of FIG. 7b, the upper end 24b, for example an assembly of sheets, is attached and fixed by any known means to the upper end 24d of the central portion 24. The upper end 24b , in the form of a cap, is for example secured to the central part by means of a not shown strap.
Les fils électriques 10 enroulés sur les dents de stator 8 comportent des extrémités de raccordement s 'étendant selon la direction axiale du stator 6 et raccordées entre-elles selon un schéma donné de connexion entre phases, par l'intermédiaire d'un disque annulaire de raccordement. Ce dernier, connu en tant que tel, est monté axialement sur les extrémités de raccordement des fils électriques 10.  The electrical wires 10 wound on the stator teeth 8 comprise connection ends extending in the axial direction of the stator 6 and connected to each other according to a given phase-to-phase connection diagram, via an annular disk of FIG. connection. The latter, known as such, is mounted axially on the connection ends of the electrical wires 10.
Les figures 8 et 8a illustrent schématiquement l'agencement entre les dents de stator 8 amovibles et la culasse statorique 7 d'un stator 6 conforme à l'invention. Ces figures illustrent également schématiquement les lignes de champ magnétiques B passant dans l'épaisseur de paroi de la culasse statorique 7. L'échange thermique entre la dent de stator 8 et la culasse statorique 7 est amélioré par exemple en disposant une graisse entre ces deux éléments avant leur assemblage.  Figures 8 and 8a schematically illustrate the arrangement between the removable stator teeth 8 and the stator yoke 7 of a stator 6 according to the invention. These figures also schematically illustrate the magnetic field lines B passing through the wall thickness of the stator yoke 7. The heat exchange between the stator tooth 8 and the stator yoke 7 is improved for example by placing a grease between these two elements before assembly.
Dans l'exemple de réalisation illustré à la figure 9, les tôles magnétiques prédécoupées 24a ainsi que les parties d'extrémité longitudinales 25 sont solidarisées par l'intermédiaire d'un ruban de frettage 27, appelé aussi ruban polyglass (nom déposé). Une structure isolante électrique 28 est ensuite montée sur la dent de stator 8, recouvrant ainsi les tôles magnétiques prédécoupées 24a et le ruban de frettage 27, au préalable de l'enroulement du fil électrique 10. La structure isolante électrique 28 présente sur ses côtés longitudinaux une forme de goulotte longitudinale 29, refermée une fois le fil électrique 10 enroulé sur la structure isolante électrique 28. Des boulons de fixation et de serrage radial 11 , destinés à traverser les parties d'extrémité longitudinales 25 sont également illustrés à la figure 9. Avantageusement, les extrémités 10a du fil électrique 10 font saillie des goulottes 29 selon une direction longitudinale. In the embodiment illustrated in FIG. 9, the pre-cut magnetic sheets 24a and the longitudinal end portions 25 are secured by means of a hooping tape 27, also called polyglass tape (trade name). An electrical insulating structure 28 is then mounted on the stator tooth 8, thus covering the pre-cut magnetic sheets 24a and the hooping tape 27, prior to the winding of the electrical wire 10. The electrical insulating structure 28 has on its longitudinal sides a longitudinal channel shape 29, closed once the electric wire 10 wound on the electrical insulating structure 28. radial fixing and clamping bolts 11, intended to pass through the longitudinal end portions 25 are also illustrated in FIG. 9. Advantageously, the ends 10a of the electrical wire 10 project from the troughs 29 in a longitudinal direction.
La figure 10 est une vue partielle, en coupe selon le plan X-X, d'une extrémité longitudinale d'une dent de stator 8 de la figure 1. Cette coupe correspond également à une coupe identique de la dent de stator 8 de la figure 9, une fois assemblée.  FIG. 10 is a partial view, in section along the plane XX, of a longitudinal end of a stator tooth 8 of FIG. 1. This section also corresponds to an identical section of the stator tooth 8 of FIG. 9 once assembled.
La figure 11 illustre schématiquement l'agencement et le positionnement relatif des dents de stator 8 en l'absence de la culasse statorique 7. L'extension longitudinale et axiale des extrémités 10a des fils électriques 10 permet l'utilisation et le montage selon une direction axiale d'un disque de connexion 30. Ce dernier, connu en tant que tel, assure de manière simple et fiable une interconnexion des différentes phases du stator conforme à l'invention. Le disque de connexion 30 comporte avantageusement des plots de connexion 31 sur lesquels seront soudées les extrémités 10a des fils électriques 10.  FIG. 11 schematically illustrates the arrangement and the relative positioning of the stator teeth 8 in the absence of the stator yoke 7. The longitudinal and axial extension of the ends 10a of the electrical wires 10 allows the use and the mounting in one direction axial axis of a connection disc 30. The latter, known as such, provides a simple and reliable way interconnecting the various phases of the stator according to the invention. The connection disk 30 advantageously comprises connection pads 31 on which the ends 10a of the electric wires 10 will be welded.
Selon un autre exemple de réalisation du stator conforme à l'invention, les extrémités longitudinales 10a des fils électriques 10 sont simplement cintrées et/ou repliées avant d'être brasées entre elles pour réaliser les interconnexions des différentes phases. Alternativement, il est envisagé de rapporter entre deux extrémités longitudinales 10a, une pièce intermédiaire. Cette dernière est alors brasée aux extrémités longitudinales 10a. Ces deux derniers modes de réalisation permettent de s'affranchir de l'utilisation d'un disque de connexion 30.  According to another exemplary embodiment of the stator according to the invention, the longitudinal ends 10a of the electrical wires 10 are simply bent and / or folded before being brazed together to make the interconnections of the different phases. Alternatively, it is envisaged to relate between two longitudinal ends 10a, an intermediate piece. The latter is then brazed at the longitudinal ends 10a. These last two embodiments make it possible to dispense with the use of a connection disc 30.
A titre d'exemple, une machine électrique synchrone, à aimants permanents 5, par exemple à force électromotrice sinusoïdale, conforme à l'invention, constitue avantageusement un moteur-roue. Ce dernier peut équiper un véhicule routier ou ferroviaire. La conception novatrice du moteur-roue conforme à l'invention, permet ainsi de réduire son encombrement et de libérer de l'espace dans ladite roue. Cet espace peut alors être utilisé pour y loger un onduleur de traction.  By way of example, a synchronous electric machine, with permanent magnets 5, for example a sinusoidal electromotive force, according to the invention, advantageously constitutes a motor-wheel. The latter can equip a road or rail vehicle. The innovative design of the motor-wheel according to the invention, thus reduces its size and free space in said wheel. This space can then be used to house a traction inverter.
La machine électrique conforme à l'invention peut également être utilisée comme moteur de treuils ou comme moteur d'ascenseurs.  The electric machine according to the invention can also be used as a winch motor or as an elevator motor.
Il est évident que la présente description ne se limite pas aux exemples explicitement décrits, mais comprend également d'autres modes de réalisation et/ou de mise en œuvre. Ainsi, une caractéristique technique décrite peut être remplacée par une caractéristique technique équivalente, sans sortir du cadre de la présente invention. It is obvious that the present description is not limited to the examples explicitly described, but also includes other modes of implementation and / or implementation. Thus, a described technical feature can be replaced by an equivalent technical characteristic, without departing from the scope of the present invention.

Claims

REVENDICATIONS
1. Dent de stator (8) amovible pour machine électrique et destinée à porter un enroulement d'un fil électrique (10), ladite dent de stator (8) comportant une partie centrale (24) formée avec un assemblage jointif de tôles magnétiques prédécoupées (24a), lesdites tôles magnétiques prédécoupées (24a) étant solidarisées entre-elles, caractérisée en ce que la partie centrale (24) est enserrée entre deux parties d'extrémité longitudinale (25) lesquelles sont solidarisées à la partie centrale (24) et traversées chacune par un boulon de fixation radiale (11), lesdites parties d'extrémité longitudinale (25) présentant une forme extérieure arrondie (25 a) pour constituer, au niveau des extrémités de la dent de stator (8), une surface de contact continue pour le ou les fils électrique(s) (10) enroulé(s) sur ladite dent de stator (8). 1. Removable stator tooth (8) for electric machine and intended to carry a winding of an electric wire (10), said stator tooth (8) having a central portion (24) formed with a joined assembly of pre-cut magnetic sheets. (24a), said pre-cut magnetic sheets (24a) being secured to each other, characterized in that the central portion (24) is sandwiched between two longitudinal end portions (25) which are secured to the central portion (24) and each having a radial attachment bolt (11), said longitudinal end portions (25) having a rounded outer shape (25a) to form a contact surface at the ends of the stator tooth (8). continuous for the electric wire (s) (10) wound (s) on said stator tooth (8).
2. Dent de stator (8) selon la revendication 1, caractérisée en ce que le(s) fil(s) électrique(s) (10) présente(nt) une section transversale rectangulaire.  2. Stator tooth (8) according to claim 1, characterized in that the (s) electric wire (s) (10) has (s) a rectangular cross section.
3. Dent de stator (8) selon la revendication 1 ou 2, caractérisée en ce que les parties d'extrémité longitudinale (25) sont métalliques.  Stator tooth (8) according to claim 1 or 2, characterized in that the longitudinal end portions (25) are metallic.
4. Stator (6) pour machine électrique comportant une culasse statorique (7) cylindrique en matériau magnétique, sur laquelle sont fixées radialement et directement des dents de stator (8) conformes à l'une quelconque des revendications 1 à 3.  4. Stator (6) for an electric machine comprising a cylindrical stator yoke (7) made of magnetic material, on which stator teeth (8) according to any one of Claims 1 to 3 are radially and directly fixed.
5. Stator (6) selon la revendication 4, caractérisé en ce que la culasse statorique (7) intègre un circuit de refroidissement.  5. Stator (6) according to claim 4, characterized in that the stator yoke (7) incorporates a cooling circuit.
6. Stator (6) selon la revendication 5, caractérisé en ce que la culasse statorique (7) comprend une portion centrale (7a) constituant un radiateur, un collecteur d'entrée et de sortie (13) du fluide de refroidissement monté selon une direction axiale sur une extrémité de la portion centrale (7a) et un collecteur de retour (14) pour le fluide de refroidissement monté selon une direction axiale sur l'autre extrémité de la portion centrale (7a), le collecteur d'entrée et de sortie (13) étant relié au circuit de refroidissement.  6. Stator (6) according to claim 5, characterized in that the stator yoke (7) comprises a central portion (7a) constituting a radiator, an inlet manifold and outlet (13) of the cooling fluid mounted according to a axial direction on one end of the central portion (7a) and a return manifold (14) for the cooling fluid mounted in an axial direction on the other end of the central portion (7a), the inlet and outlet manifold outlet (13) being connected to the cooling circuit.
7. Stator (6) selon la revendication 5, caractérisé en ce que la culasse statorique (7) comprend une portion cylindrique interne (7b) et une portion cylindrique externe (7c) s 'étendant autour de ladite portion cylindrique interne en délimitant entre lesdites portions cylindriques un circuit de refroidissement hélicoïdal sous forme d'hélice double pas constituant un radiateur, la culasse statorique (7) comprenant également un collecteur d'entrée et de sortie (13a) du fluide de refroidissement monté selon une direction axiale sur une extrémité des portions cylindriques (7b, 7c) et en communication fluidique avec l'hélice double pas, le collecteur d'entrée et de sortie (13a) assurant l'entrée et la sortie du fluide de refroidissement étant relié au circuit de refroidissement. Stator (6) according to claim 5, characterized in that the stator yoke (7) comprises an inner cylindrical portion (7b) and an outer cylindrical portion (7c) extending around said inner cylindrical portion delimiting between said cylindrical portions a helical cooling circuit in the form of a double helix constituting a radiator, the stator yoke (7) also comprising an inlet and outlet manifold (13a) of the cooling fluid mounted in an axial direction on one end of the cylindrical portions (7b, 7c) and in fluid communication with the double helix not, the inlet and outlet manifold (13a) ensuring the inlet and the outlet of the cooling fluid being connected to the cooling circuit.
8. Stator (6) selon l'une quelconque des revendications 4 à 7, caractérisé en ce que les fils électriques (10) enroulés sur les dents de stator (8) comportent des extrémités de raccordement (10a) s 'étendant selon la direction axiale dudit stator (6) et raccordés selon un schéma donné de connexion entre phases, par l'intermédiaire d'un disque de raccordement (30) monté axialement sur lesdites extrémités de raccordement.  8. Stator (6) according to any one of claims 4 to 7, characterized in that the electrical son (10) wound on the stator teeth (8) have connecting ends (10a) extending in the direction axial direction of said stator (6) and connected according to a given pattern of connection between phases, via a connecting disc (30) axially mounted on said connection ends.
9. Stator (6) selon l'une quelconque des revendications 4 à 7, caractérisé en ce que les fils électriques (10) enroulés sur les dents de stator (8) comportent des extrémités (10a) de raccordement s 'étendant selon la direction axiale dudit stator (6) et cintrées et/ou repliées pour être raccordées entre elles par brasage, selon un schéma donné de connexion entre phases.  9. Stator (6) according to any one of claims 4 to 7, characterized in that the electrical son (10) wound on the stator teeth (8) have ends (10a) of connection extending in the direction axial of said stator (6) and bent and / or folded to be connected together by brazing, according to a given pattern of connection between phases.
10. Stator (6) selon l'une quelconque des revendications 4 à 7, caractérisé en ce que les fils électriques (10) enroulés sur les dents de stator (8) comportent des extrémités (10a) de raccordement s 'étendant selon la direction axiale dudit stator (6) et raccordés selon un schéma donné de connexion entre phases, par l'intermédiaire d'une pièce rapportée et brasée sur des extrémités (10a) de raccordement.  10. Stator (6) according to any one of claims 4 to 7, characterized in that the electrical son (10) wound on the stator teeth (8) have ends (10a) connecting extending in the direction axial axis of said stator (6) and connected in a given pattern of connection between phases, via an insert and soldered on ends (10a) of connection.
11. Machine électrique comportant un rotor (1) s 'étendant autour d'un stator (6) conforme à l'une quelconque des revendications 4 à 8. Electric machine comprising a rotor (1) extending around a stator (6) according to any one of claims 4 to 8.
12. Machine électrique selon la revendication 9, caractérisée en ce que le rotor (1) est constitué d'une tôle magnétique sur laquelle sont fixés directement des aimants permanents (5). Electric machine according to claim 9, characterized in that the rotor (1) consists of a magnetic plate to which permanent magnets (5) are directly attached.
13. Machine électrique selon la revendication 10, caractérisée en ce que les aimants permanents (5) sont fixés sur la tôle magnétique par collage ou par tout autre moyen de retenue mécanique.  13. Electrical machine according to claim 10, characterized in that the permanent magnets (5) are fixed to the magnetic sheet by gluing or by any other mechanical retaining means.
14. Moteur-roue caractérisé en ce qu'il comprend une machine électrique selon l'une quelconque des revendications 9 à 11, le rotor (1) comporte un moyeu monté libre en rotation par l'intermédiaire de roulements sur une fusée (2) fixe, ledit rotor (1) constituant une jante présentant une face extérieure (4b) sur laquelle est montée un pneu et une face intérieure (4a) sur laquelle sont fixés les aimants permanents (5), le stator (6) étant destiné à être solidaire d'un châssis fixe.  14. A wheel motor characterized in that it comprises an electric machine according to any one of claims 9 to 11, the rotor (1) comprises a hub mounted free to rotate by means of bearings on a rocket (2). fixed, said rotor (1) constituting a rim having an outer face (4b) on which is mounted a tire and an inner face (4a) on which are fixed the permanent magnets (5), the stator (6) being intended to be secured to a fixed frame.
EP15745540.3A 2014-07-28 2015-07-24 Improved stator, and electrical machine comprising such a stator Withdrawn EP3175534A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1457304A FR3024300B1 (en) 2014-07-28 2014-07-28 IMPROVED STATOR AND ELECTRIC MACHINE COMPRISING SUCH A STATOR
PCT/FR2015/052056 WO2016016558A2 (en) 2014-07-28 2015-07-24 Improved stator, and electrical machine comprising such a stator

Publications (1)

Publication Number Publication Date
EP3175534A2 true EP3175534A2 (en) 2017-06-07

Family

ID=52465441

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15745540.3A Withdrawn EP3175534A2 (en) 2014-07-28 2015-07-24 Improved stator, and electrical machine comprising such a stator

Country Status (10)

Country Link
US (1) US10284031B2 (en)
EP (1) EP3175534A2 (en)
KR (1) KR20170039240A (en)
CN (1) CN106575889B (en)
AU (1) AU2015295145B2 (en)
BR (1) BR112017001545A2 (en)
CA (1) CA2956503A1 (en)
FR (1) FR3024300B1 (en)
MX (1) MX363633B (en)
WO (1) WO2016016558A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017104684A1 (en) * 2016-03-18 2017-09-21 Ksm Castings Group Gmbh Hybrid rim of a wheel provided with a wheel hub motor
US10516322B2 (en) 2016-05-19 2019-12-24 Arm Ltd. Method and apparatus for maintenance of electric motor
FR3075498B1 (en) * 2017-12-19 2020-08-07 Valeo Systemes De Controle Moteur ELECTRIC MACHINE

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2236291A (en) * 1939-11-17 1941-03-25 Gen Electric Dynamoelectric machine
US3147393A (en) * 1961-03-21 1964-09-01 Shinko Electric Co Ltd Fast response field magnet d. c. dynamoelectric machine
CA1323650C (en) * 1985-11-12 1993-10-26 Franklin Lee Forbes Electrically commutated motor having an edgewise wound yoke
DE102007048260A1 (en) * 2007-10-08 2009-04-09 Robert Bosch Gmbh Stator arrangement and stator for an electric machine
FR2957730B1 (en) * 2010-03-17 2013-02-22 Converteam Technology Ltd ROTATING ELECTRICAL MACHINE WITH STATOR WITH CONCENTRIC WINDINGS
US8242656B1 (en) * 2010-06-11 2012-08-14 Yu-Ming Lin Motor
FI124814B (en) * 2010-10-18 2015-01-30 Lappeenrannan Teknillinen Yliopisto Electric machine stator and electric machine
JP5683008B2 (en) * 2011-05-26 2015-03-11 アスモ株式会社 Motor core, stator and stator manufacturing method
EP2845298B1 (en) * 2012-05-04 2019-01-09 Moog Inc. Device and method for cooling electric device having modular stators
CN103683561A (en) * 2012-09-07 2014-03-26 上海三菱电梯有限公司 Stator of rotary motor
GB2493658B (en) * 2012-10-15 2015-05-20 Protean Electric Ltd A tooth for an electric motor or generator

Also Published As

Publication number Publication date
CA2956503A1 (en) 2016-02-04
CN106575889A (en) 2017-04-19
CN106575889B (en) 2019-02-22
AU2015295145B2 (en) 2018-10-25
WO2016016558A2 (en) 2016-02-04
AU2015295145A1 (en) 2017-02-09
FR3024300B1 (en) 2016-08-05
BR112017001545A2 (en) 2018-01-30
KR20170039240A (en) 2017-04-10
US10284031B2 (en) 2019-05-07
MX2017001137A (en) 2017-05-09
FR3024300A1 (en) 2016-01-29
MX363633B (en) 2019-03-29
WO2016016558A3 (en) 2016-06-02
US20170214280A1 (en) 2017-07-27

Similar Documents

Publication Publication Date Title
WO2002050977A2 (en) Stator windings and connections alternator
FR2884068A1 (en) ROTOR OF ROTATING ELECTRIC MACHINE COMPRISING AN INTERMEDIATE SLEEVE INTERPOSED BETWEEN THE SHAFT AND THE POLAR WHEELS AND METHOD FOR PRODUCING THE ROTOR.
FR2983367A1 (en) COOLING OF ELECTRIC MOTOR WITH COOLING TUBE AND CONDUCTION PLATES OR COUPLES
EP3280034B1 (en) Rotary electric motor provided with an interconnector having supporting jacks
EP3520205A1 (en) Heat sink for rotary electric machine
EP2677634A1 (en) Interconnector for stator of an electric machine and associated electric machine stator
WO2016016558A2 (en) Improved stator, and electrical machine comprising such a stator
WO2019234024A1 (en) Stator for a rotating electrical machine
WO2010026158A1 (en) Stator structure for electric machine
WO2008087341A2 (en) Stator for a multiple phase rotary electric machine, multiple phase rotary electric machine including such rotor, and method for making such rotor
FR2835978A1 (en) ALTERNATOR, PARTICULARLY FOR MOTOR VEHICLE
EP4066358A1 (en) Rotary electric machine stator with asymmetric winding
FR3069972A1 (en) CONCENTRIC MAGNET ROTOR FOR ROTATING ELECTRIC MACHINE
WO2019234030A1 (en) Stator for a rotating electrical machine
WO2003100945A1 (en) Alternator equipped with stator having twisted inputs
EP3280033A1 (en) Rotary electric motor provided with a self-stripping interconnector
FR3010850A1 (en) CLAMPING AN INTERCONNECTOR ON A STATOR
FR3036554A1 (en) ROTATING ELECTRIC MACHINE
FR3054741A1 (en) ROTATING ELECTRIC MACHINE PROVIDED WITH A STATOR WITH A PIPE WINDING
FR3067881A1 (en) ROTOR FOR A ROTATING ELECTRIC MACHINE
FR2869739A1 (en) Polyphase alternator for motor vehicle, has rotor with two polar wheels having teeth at external periphery, where teeth of one wheel are off-centered with respect to teeth of other wheel, and grooves housed at external periphery of teeth
FR3055755B1 (en) ROTATING ELECTRICAL MACHINE COMPRISING A DEMONABLE ELECTRONIC ASSEMBLY
WO2021099533A1 (en) Rotary electric machine with axial immobilization of the stator
CH716105B1 (en) Stator for an electric motor, electric motor comprising such a stator and method for assembling such a stator.
FR3087595A1 (en) MAGNETIC ASSEMBLY SHEET COMPRISING COOLING CHANNELS, MAGNETIC ASSEMBLY, AND ROTATING ELECTRIC MACHINE INCLUDING A STACK OF SUCH MAGNETIC ASSEMBLY SHEETS

Legal Events

Date Code Title Description
17P Request for examination filed

Effective date: 20170126

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RIN1 Information on inventor provided before grant (corrected)

Inventor name: DUMAS, PIERRE

Inventor name: VERDIER, LAURENT

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20200201