EP3977601A1 - Rotating electric machine provided with a cooling chamber - Google Patents

Rotating electric machine provided with a cooling chamber

Info

Publication number
EP3977601A1
EP3977601A1 EP20729080.0A EP20729080A EP3977601A1 EP 3977601 A1 EP3977601 A1 EP 3977601A1 EP 20729080 A EP20729080 A EP 20729080A EP 3977601 A1 EP3977601 A1 EP 3977601A1
Authority
EP
European Patent Office
Prior art keywords
yoke
electric machine
stator body
machine according
cooling chamber
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.)
Pending
Application number
EP20729080.0A
Other languages
German (de)
French (fr)
Inventor
Khadija El Baraka
Svetislav JUGOVIC
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.)
Valeo Equipements Electriques Moteur SAS
Original Assignee
Valeo Equipements Electriques Moteur 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 Valeo Equipements Electriques Moteur SAS filed Critical Valeo Equipements Electriques Moteur SAS
Publication of EP3977601A1 publication Critical patent/EP3977601A1/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/02—Details of the magnetic circuit characterised by the magnetic material
    • 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
    • H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H02K9/197—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator

Definitions

  • the present invention relates to a rotating electric machine provided with a cooling chamber.
  • the invention finds a particularly advantageous, but not exclusive, application with the rotating electrical machines equipping motor vehicles.
  • a rotating electrical machine comprises a stator and a rotor secured to a shaft.
  • the rotor may be integral with a driving and / or driven shaft and may belong to a rotating electric machine in the form of an alternator, an electric motor, or a reversible machine capable of operating in both modes.
  • the stator is mounted in a housing configured to rotate the shaft, for example by means of bearings.
  • the rotor comprises a body formed by a stack of sheet metal sheets held in the form of a bundle by means of a suitable fixing system, such as rivets axially passing through the body of the rotor right through.
  • the rotor comprises poles formed for example by permanent magnets housed in cavities formed in the magnetic mass of the rotor, as described for example in document EP0803962.
  • the poles are formed by coils wound around the arms of the rotor.
  • the stator comprises a body formed by a stack of thin sheets forming a ring, the inner face of which is provided with notches open inwardly to receive phase windings.
  • the phase windings are obtained for example from a continuous wire covered with enamel or pins welded together. These windings are polyphase windings connected in star or delta, the outputs of which are connected to an electronic control module comprising a power inverter.
  • document WO2017216488 teaches the production of a cooling chamber arranged around the stator.
  • a cooling liquid such as water, is intended to circulate in the chamber to extract the calories from the stator generated by the passage of currents in the winding.
  • the cooling chamber is delimited on the one hand by an outer periphery of one of the bearings of the housing and on the other hand by an internal periphery of the other bearing of the housing.
  • the stator body is shrunk with an internal periphery of one of the bearings, which constitutes a complex and expensive operation.
  • such a configuration is bulky due to the radial superposition of the walls of the bearings to form the cooling chamber.
  • the present invention aims to effectively remedy these drawbacks by providing a rotary electrical machine, in particular for a motor vehicle, comprising:
  • stator comprising a stator body and a winding, said stator body comprising a yoke and teeth coming from an internal periphery of the yoke,
  • the cooling chamber being delimited at least partly on the one hand by an outer periphery of the yoke of the stator body and on the other hand by a periphery internal bearing.
  • the invention thus makes it possible to eliminate one of the bearings to form the cooling chamber, which makes the assembly more compact and has an economic character.
  • the fact that at least the outer portion of the cylinder head is made of a magnetic composite material makes it possible to guarantee the tightness of the cooling chamber with respect to a stator body conventionally made entirely of laminated sheets.
  • the invention makes it possible to eliminate the hooping step, so that the rotary electric machine is easier to produce.
  • the stator body is made entirely from a composite magnetic material.
  • the stator body comprises a first part formed by an internal portion of the yoke and the teeth and a second part formed by the outer portion of the yoke made of a composite magnetic material.
  • the external portion of the cylinder head is molded around the internal portion of the cylinder head.
  • the outer portion of the cylinder head is fixed to the internal portion of the cylinder head, in particular by fitting or gluing.
  • the outer portion of the cylinder head comprises at least one groove intended to receive a seal.
  • the outer portion of the cylinder head comprises a shoulder constituting an axial end wall of the cooling chamber.
  • the internal periphery of the bearing comprises a shoulder constituting an axial end wall of the cooling chamber.
  • the internal periphery of the bearing has a shoulder constituting an axial positioning stop for an axial end of the stator body.
  • said rotating electrical machine comprises a dividing wall between a cooling liquid inlet and a cooling liquid outlet.
  • a thickness of the external portion of the cylinder head is between 2mm and 4mm and is preferably of the order of 3mm.
  • Figure 1 is a longitudinal sectional view of a first embodiment of a rotary electrical machine according to the present invention.
  • Figure 2 is an exploded perspective view of the rotary electrical machine of Figure 1;
  • Figure 3 is a perspective view of the stator of the rotary electrical machine of Figure 1;
  • Figure 4 is a longitudinal sectional view of a second embodiment of a rotary electrical machine according to the present invention.
  • Figure 5 is a perspective view of the stator of the rotary electrical machine of Figure 4.
  • Figure 1 shows a rotating electrical machine 10 comprising a polyphase stator 1 1 surrounding a rotor 12 mounted on a shaft 13 of axis X corresponding to the axis of the electric machine 10.
  • the stator 1 1 surrounds the rotor 12 with the presence of an air gap between the internal periphery of the stator 11 and the external periphery of the rotor 12.
  • the electric machine 10 also comprises a front bearing 15 and a rear bearing 16 each provided with a housing 17 intended to receive a means of guiding the shaft 13 in rotation, such as a ball bearing.
  • the front bearing 15 is located on the side of the output of the shaft 13 intended to cooperate with an external element of the machine (belt system, gear, or other), while the rear bearing 16 is located on the side opposite to the output of the shaft 13.
  • the rear bearing 16 comprises a portion 21 of transverse orientation relative to the axis X centrally comprising the housing 17 of a bearing 19 and from which an annular portion comes 22 axially oriented having an axial length at least equal to that of the stator 1 January.
  • the front bearing 15 comprises a transverse portion 23 centrally comprising a housing 17 of a bearing 19 from which an annular portion 24 axially shorter than the annular portion 22 of the rear bearing 16.
  • the front bearing 15 forms a cover. intended to close the open end of the rear bearing 16.
  • fixing members 26, such as screws or rivets cooperate with projecting lugs 27 produced on the outer periphery of the front bearing 15 and of the rear bearing 16.
  • the configurations of the front bearing 15 and of the rear bearing 16 could of course be reversed, that is to say that the rear bearing 16 could act as a cover for the front bearing 15.
  • the rotor 12 comprises, in a manner known per se, a body 29 in the form of a pack of sheets. Permanent magnets 30 are implanted in cavities of the body 29, as shown in FIGS. 1 and 4.
  • the permanent magnets 30 may be of rare earths or of ferrite depending on the applications and the desired power of the electrical machine 10.
  • the rotor 12 comprises two flanges 31 each pressed against an axial end face of the rotor 12. These flanges 31 provide axial retention of the magnets 30 and serve, where appropriate, to balance the rotor 12.
  • the stator 1 1 comprises a body 33 as well as a coil 34.
  • the stator body 33 is provided with teeth 35 from an internal periphery of a cylinder head 37 annular with axial orientation relative to the X axis.
  • the teeth 35 and the yoke 37 have a magnetic function, insofar as the magnetic flux of the electric machine passes through these elements to ensure its operation.
  • the teeth 35 define two by two of the notches 40 for mounting the coil 34 of the stator January 1. Thus, two successive notches 40 are separated by a tooth 35.
  • the notches 40 open axially into the axial end faces and radially towards the inside of the stator body 33.
  • the stator body 33 is made in two parts, namely a first part 33.1 formed by an internal portion 37.1 of the cylinder head 37 from which the teeth 35 and a second part 33.2, independent of the first part 33.1, formed by an outer portion 37.2 of the cylinder head 37.
  • the first part 33.1 namely the whole "internal portion 37.1 of the cylinder head 37 and teeth 35" consists of a bundle of sheets produced by a stack of sheets of sheets held in the form of a package by means of a suitable fixing system, such as rivets.
  • the second part 33.2 namely the outer portion 37.2 of the cylinder head 37, is made of a composite magnetic material, or SMC material for "Soft Magnetic Composite” in English).
  • This material contains powder of ferromagnetic material, such as steel powder, the particles of which are bonded with an insulating material, for example a polymer material resistant to high temperatures.
  • the outer portion 37.2 of the cylinder head 37 is preferably molded around the internal portion 37.1 of the cylinder head 37.
  • the outer portion 37.2 of the cylinder head 37 is fixed to the internal portion 37.1 of the cylinder head 37, in particular by fitting or gluing.
  • the outer portion 37.2 of the cylinder head 37 has a thickness between 2mm and 4mm and is preferably of the order of 3mm.
  • the internal portion 37.1 of the cylinder head 37 has a thickness of between 1 5mm and 3mm, and is preferably of the order of 2mm.
  • the coil 34 shown in Figures 1 and 2 comprises a set of phase windings passing through the notches 40 and forming buns extending projecting on either side of the stator body 33.
  • the coil 34 is made from conductive elements in the form of pins connected together for example by welding. These windings are for example three-phase or double three-phase windings connected in star or delta.
  • a cooling chamber 41 is arranged around the stator body 33, as shown in FIG. 1.
  • the cooling chamber 41 may advantageously have an annular shape.
  • the cooling chamber 41 is provided with an inlet 42 and a cooling liquid outlet 43 (see FIG. 2) to allow circulation of the cooling liquid inside the cooling chamber 41 around the stator body 33.
  • the cooling chamber 41 is delimited at least in part on the one hand by an outer periphery of the yoke 37 of the stator body 33 and on the other hand by an inner periphery of one of the bearings. In this case, the cooling chamber 41 is delimited at least in part on the one hand by an outer periphery of the outer portion 37.2 of the cylinder head 37 and on the other hand by an inner periphery of the rear bearing 16.
  • the cooling liquid such as water or oil or any other liquid with a high heat transfer capacity suitable for the application, being in direct contact with the stator body 33, the extraction of calories generated by the current flowing in the coil 34 is optimal.
  • the outer portion 37.2 of the cylinder head 37 comprises a shoulder 45 defined by a difference in external diameter constituting an axial end wall of the cooling chamber 41.
  • the rear bearing 16 comprises an internal periphery stepped in diameter having a shoulder 46 constituting the other axial end wall of the cooling chamber 41.
  • the internal periphery of the rear bearing 16 also comprises a shoulder 47 constituting an axial positioning stop for an axial end of the stator body 33.
  • the sealing of the cooling chamber 41 is provided by seals 49, in particular of the O-ring type, each arranged in a corresponding groove 50 formed in the outer portion 37.2 of the cylinder head 37.
  • seals 49 may be provided in the internal periphery of the rear bearing 16.
  • a wall 51 makes it possible to separate the inlet 42 of coolant and the outlet 43 of coolant in order to promote renewal of the coolant in the chamber 41.
  • the stator body 33 is made entirely of a composite magnetic material.
  • the stator 11 may include a coil 34 made from continuous son or pins as above, or from individual coils 53 wound around the teeth 35 of the stator 1 1 by means of a coil insulator 54, such as as shown in Figure 5.

Abstract

The invention relates mainly to a rotating electric machine (10), in particular for a motor vehicle, comprising: - a stator (11) comprising a stator body (33) and a winding (34), the stator body (33) comprising a yoke (37) and teeth from an inner periphery of the yoke (37), - at least one bearing (16) provided with a housing (17) intended to receive a means for guiding the rotation (19) of a shaft (13), and - a cooling chamber (41) which is arranged around the stator body (33) and in which a cooling liquid circulates, - at least one outer portion (37.2) of the yoke (37) is made of a magnetic composite material, the cooling chamber (41) being defined at least in part by, on the one hand, an outer periphery of the yoke (37) of the stator body (33) and, on the other hand, by an inner periphery of the bearing (16).

Description

Description Description
Titre de l'invention: [MACHINE ELECTRIQUE TOURNANTE MUNIE Title of the invention: [ROTATING ELECTRIC MACHINE
D'UNE CHAMBRE DE REFROIDISSEMENT A COOLING CHAMBER
[0001 ] La présente invention porte sur une machine électrique tournante munie d'une chambre de refroidissement. L'invention trouve une application particulièrement avantageuse, mais non exclusive, avec les machines électriques tournantes équipant les véhicules automobiles. The present invention relates to a rotating electric machine provided with a cooling chamber. The invention finds a particularly advantageous, but not exclusive, application with the rotating electrical machines equipping motor vehicles.
[0002] De façon connue en soi, une machine électrique tournante comporte un stator et un rotor solidaire d'un arbre. Le rotor pourra être solidaire d'un arbre menant et/ou mené et pourra appartenir à une machine électrique tournante sous la forme d'un alternateur, d'un moteur électrique, ou d'une machine réversible pouvant fonctionner dans les deux modes. [0002] In a manner known per se, a rotating electrical machine comprises a stator and a rotor secured to a shaft. The rotor may be integral with a driving and / or driven shaft and may belong to a rotating electric machine in the form of an alternator, an electric motor, or a reversible machine capable of operating in both modes.
[0003] Le stator est monté dans un carter configuré pour porter à rotation l'arbre par exemple par l'intermédiaire de roulements. Le rotor comporte un corps formé par un empilage de feuilles de tôles maintenues sous forme de paquet au moyen d'un système de fixation adapté, tel que des rivets traversant axialement le corps du rotor de part en part. Le rotor comporte des pôles formés par exemple par des aimants permanents logés dans des cavités ménagées dans la masse magnétique du rotor, comme cela est décrit par exemple dans le document EP0803962. Alternativement, dans une architecture dite à pôles "saillants", les pôles sont formés par des bobines enroulées autour de bras du rotor. [0003] The stator is mounted in a housing configured to rotate the shaft, for example by means of bearings. The rotor comprises a body formed by a stack of sheet metal sheets held in the form of a bundle by means of a suitable fixing system, such as rivets axially passing through the body of the rotor right through. The rotor comprises poles formed for example by permanent magnets housed in cavities formed in the magnetic mass of the rotor, as described for example in document EP0803962. Alternatively, in a so-called “salient” pole architecture, the poles are formed by coils wound around the arms of the rotor.
[0004] Par ailleurs, le stator comporte un corps constitué par un empilage de tôles minces formant une couronne, dont la face intérieure est pourvue d'encoches ouvertes vers l'intérieur pour recevoir des enroulements de phase. Les enroulements de phase sont obtenus par exemple à partir d'un fil continu recouvert d'émail ou d'épingles soudées entre elles. Ces enroulements sont des enroulements polyphasés connectés en étoile ou en triangle dont les sorties sont reliées à un module électronique de commande comportant un onduleur de puissance. [0005] Afin d'assurer le refroidissement de la machine électrique, le document WO2017216488 enseigne la réalisation d'une chambre de refroidissement disposée autour du stator. Un liquide de refroidissement, tel que de l'eau, est destiné à circuler dans la chambre pour extraire les calories du stator générées par le passage des courants dans le bobinage. [0004] Furthermore, the stator comprises a body formed by a stack of thin sheets forming a ring, the inner face of which is provided with notches open inwardly to receive phase windings. The phase windings are obtained for example from a continuous wire covered with enamel or pins welded together. These windings are polyphase windings connected in star or delta, the outputs of which are connected to an electronic control module comprising a power inverter. [0005] In order to ensure the cooling of the electrical machine, document WO2017216488 teaches the production of a cooling chamber arranged around the stator. A cooling liquid, such as water, is intended to circulate in the chamber to extract the calories from the stator generated by the passage of currents in the winding.
[0006] La chambre de refroidissement est délimitée d'une part par une périphérie externe d'un des paliers du carter et d'autre part par une périphérie interne de l'autre palier du carter. Afin d'établir un contact intime entre le corps de stator et la chambre de refroidissement, le corps de stator est fretté avec une périphérie interne d'un des paliers, ce qui constitue une opération complexe et coûteuse. En outre, une telle configuration est encombrante du fait de la superposition radiale des parois des paliers pour former la chambre de refroidissement. The cooling chamber is delimited on the one hand by an outer periphery of one of the bearings of the housing and on the other hand by an internal periphery of the other bearing of the housing. In order to establish intimate contact between the stator body and the cooling chamber, the stator body is shrunk with an internal periphery of one of the bearings, which constitutes a complex and expensive operation. In addition, such a configuration is bulky due to the radial superposition of the walls of the bearings to form the cooling chamber.
[0007] La présente invention vise à remédier efficacement à ces inconvénients en proposant une machine électrique tournante, notamment pour véhicule automobile, comportant: [0007] The present invention aims to effectively remedy these drawbacks by providing a rotary electrical machine, in particular for a motor vehicle, comprising:
- un stator comprenant un corps de stator et un bobinage, ledit corps de stator comportant une culasse et des dents issues d'une périphérie interne de la culasse, a stator comprising a stator body and a winding, said stator body comprising a yoke and teeth coming from an internal periphery of the yoke,
- au moins un palier muni d'un logement destiné à recevoir un moyen de guidage en rotation d'un arbre, et - at least one bearing provided with a housing intended to receive a means for guiding a shaft in rotation, and
- une chambre de refroidissement disposée autour du corps de stator et dans laquelle circule un liquide de refroidissement, - a cooling chamber arranged around the stator body and in which a cooling liquid circulates,
- au moins une portion externe de la culasse étant réalisée dans un matériau composite magnétique, la chambre de refroidissement étant délimitée au moins en partie d'une part par une périphérie externe de la culasse du corps de stator et d'autre part par une périphérie interne du palier. - at least one outer portion of the yoke being made of a magnetic composite material, the cooling chamber being delimited at least partly on the one hand by an outer periphery of the yoke of the stator body and on the other hand by a periphery internal bearing.
[0008] L'invention permet ainsi de supprimer un des paliers pour former la chambre de refroidissement, ce qui rend l'ensemble plus compact et présente un caractère économique. Le fait qu'au moins la portion externe de la culasse soit réalisée en matériau composite magnétique permet de garantir l'étanchéité de la chambre de refroidissement par rapport à un corps de stator réalisé classiquement entièrement en tôles feuilletées. En outre, l'invention permet de supprimer l'étape de frettage, de sorte que la machine électrique tournante est plus facile à réaliser. [0009] Selon une réalisation, le corps de stator est réalisé entièrement dans un matériau magnétique composite. [0008] The invention thus makes it possible to eliminate one of the bearings to form the cooling chamber, which makes the assembly more compact and has an economic character. The fact that at least the outer portion of the cylinder head is made of a magnetic composite material makes it possible to guarantee the tightness of the cooling chamber with respect to a stator body conventionally made entirely of laminated sheets. In addition, the invention makes it possible to eliminate the hooping step, so that the rotary electric machine is easier to produce. [0009] According to one embodiment, the stator body is made entirely from a composite magnetic material.
[0010] Selon une réalisation, le corps de stator comporte une première partie formée par une portion interne de la culasse et les dents et une deuxième partie formée par la portion externe de la culasse réalisée dans un matériau magnétique composite. Une telle configuration offre un bon compromis en termes de performances magnétiques. [0010] According to one embodiment, the stator body comprises a first part formed by an internal portion of the yoke and the teeth and a second part formed by the outer portion of the yoke made of a composite magnetic material. Such a configuration offers a good compromise in terms of magnetic performance.
[001 1 ] Selon une réalisation, la portion externe de la culasse est surmoulée autour de la portion interne de la culasse. [001 1] According to one embodiment, the external portion of the cylinder head is molded around the internal portion of the cylinder head.
[0012] Selon une réalisation, la portion externe de la culasse est fixée à la portion interne de la culasse, notamment par emmanchement ou collage. [0012] According to one embodiment, the outer portion of the cylinder head is fixed to the internal portion of the cylinder head, in particular by fitting or gluing.
[0013] Selon une réalisation, la portion externe de la culasse comporte au moins une rainure destinée à recevoir un joint d'étanchéité. [0013] According to one embodiment, the outer portion of the cylinder head comprises at least one groove intended to receive a seal.
[0014] Selon une réalisation, la portion externe de la culasse comporte un épaulement constituant une paroi d'extrémité axiale de la chambre de refroidissement. [0014] According to one embodiment, the outer portion of the cylinder head comprises a shoulder constituting an axial end wall of the cooling chamber.
[0015] Selon une réalisation, la périphérie interne du palier comporte un épaulement constituant une paroi d'extrémité axiale de la chambre de refroidissement. According to one embodiment, the internal periphery of the bearing comprises a shoulder constituting an axial end wall of the cooling chamber.
[0016] Selon une réalisation, la périphérie interne du palier comporte un épaulement constituant une butée de mise en place axiale pour une extrémité axiale du corps de stator. According to one embodiment, the internal periphery of the bearing has a shoulder constituting an axial positioning stop for an axial end of the stator body.
[0017] Selon une réalisation, ladite machine électrique tournante comporte un muret de séparation entre une entrée de liquide de refroidissement et une sortie de liquide de refroidissement. [0017] According to one embodiment, said rotating electrical machine comprises a dividing wall between a cooling liquid inlet and a cooling liquid outlet.
[0018] Selon une réalisation, une épaisseur de la portion externe de la culasse est comprise entre 2mm et 4mm et vaut de préférence de l'ordre de 3mm. [0018] According to one embodiment, a thickness of the external portion of the cylinder head is between 2mm and 4mm and is preferably of the order of 3mm.
[0019] L’invention sera mieux comprise à la lecture de la description qui suit et à l’examen des figures qui l’accompagnent. Ces figures ne sont données qu’à titre illustratif mais nullement limitatif de l’invention. [0020] [Figure 1 ] La figure 1 est une vue en coupe longitudinale d'un premier mode de réalisation d'une machine électrique tournante selon la présente invention; [0019] The invention will be better understood on reading the following description and on examining the accompanying figures. These figures are given only by way of illustration but in no way limit the invention. [0020] [Figure 1] Figure 1 is a longitudinal sectional view of a first embodiment of a rotary electrical machine according to the present invention;
[0021 ] [Figure 2] La figure 2 est une vue en perspective éclatée de la machine électrique tournante de la figure 1 ; [0021] [Figure 2] Figure 2 is an exploded perspective view of the rotary electrical machine of Figure 1;
[0022] [Figure 3] La figure 3 est une vue en perspective du stator de la machine électrique tournante de la figure 1 ; [0022] [Figure 3] Figure 3 is a perspective view of the stator of the rotary electrical machine of Figure 1;
[0023] [Figure 4] La figure 4 est une vue en coupe longitudinale d'un deuxième mode de réalisation d'une machine électrique tournante selon la présente invention; [0023] [Figure 4] Figure 4 is a longitudinal sectional view of a second embodiment of a rotary electrical machine according to the present invention;
[0024] [Figure 5] La figure 5 est une vue en perspective du stator de la machine électrique tournante de la figure 4. [0024] [Figure 5] Figure 5 is a perspective view of the stator of the rotary electrical machine of Figure 4.
[0025] Les éléments identiques, similaires, ou analogues conservent la même référence d’une figure à l’autre. Identical, similar, or analogous elements keep the same reference from one figure to another.
[0026] La figure 1 montre une machine électrique tournante 10 comportant un stator 1 1 polyphasé entourant un rotor 12 monté sur un arbre 13 d'axe X correspondant à l'axe de la machine électrique 10. Le stator 1 1 entoure le rotor 12 avec présence d’un entrefer entre la périphérie interne du stator 1 1 et la périphérie externe du rotor 12. La machine électrique 10 comporte également un palier avant 15 et un palier arrière 16 muni chacun d'un logement 17 destiné à recevoir un moyen de guidage en rotation 19 de l'arbre 13, tel qu'un roulement à billes. Figure 1 shows a rotating electrical machine 10 comprising a polyphase stator 1 1 surrounding a rotor 12 mounted on a shaft 13 of axis X corresponding to the axis of the electric machine 10. The stator 1 1 surrounds the rotor 12 with the presence of an air gap between the internal periphery of the stator 11 and the external periphery of the rotor 12. The electric machine 10 also comprises a front bearing 15 and a rear bearing 16 each provided with a housing 17 intended to receive a means of guiding the shaft 13 in rotation, such as a ball bearing.
[0027] Le palier avant 15 est situé du côté de la sortie de l'arbre 13 destinée à coopérer avec un élément externe de la machine (système à courroie, engrenage, ou autre), tandis que le palier arrière 16 est situé du côté opposé par rapport à la sortie de l'arbre 13. The front bearing 15 is located on the side of the output of the shaft 13 intended to cooperate with an external element of the machine (belt system, gear, or other), while the rear bearing 16 is located on the side opposite to the output of the shaft 13.
[0028] Comme on peut le voir sur la figure 2, le palier arrière 16 comporte une portion 21 d'orientation transversale par rapport à l'axe X comprenant centralement le logement 17 d'un roulement 19 et de laquelle est issue une portion annulaire 22 d'orientation axiale ayant une longueur axiale au moins égale à celle du stator 1 1 . [0029] Le palier avant 15 comporte une portion transversale 23 comprenant centralement un logement 17 d'un roulement 19 de laquelle est issue une portion annulaire 24 plus courte axialement que la portion annulaire 22 du palier arrière 16. Le palier avant 15 forme un couvercle destiné à fermer l'extrémité ouverte du palier arrière 16. A cet effet, des organes de fixation 26, tels que des vis ou des rivets, coopèrent avec des oreilles saillantes 27 réalisées en périphérie externe du palier avant 15 et du palier arrière 16. En variante, les configurations du palier avant 15 et du palier arrière 16 pourront bien entendu être inversées, c’est-à-dire que le palier arrière 16 pourra jouer un rôle de couvercle pour le palier avant 15. As can be seen in Figure 2, the rear bearing 16 comprises a portion 21 of transverse orientation relative to the axis X centrally comprising the housing 17 of a bearing 19 and from which an annular portion comes 22 axially oriented having an axial length at least equal to that of the stator 1 January. The front bearing 15 comprises a transverse portion 23 centrally comprising a housing 17 of a bearing 19 from which an annular portion 24 axially shorter than the annular portion 22 of the rear bearing 16. The front bearing 15 forms a cover. intended to close the open end of the rear bearing 16. For this purpose, fixing members 26, such as screws or rivets, cooperate with projecting lugs 27 produced on the outer periphery of the front bearing 15 and of the rear bearing 16. As a variant, the configurations of the front bearing 15 and of the rear bearing 16 could of course be reversed, that is to say that the rear bearing 16 could act as a cover for the front bearing 15.
[0030] Le rotor 12 comporte, de façon connue en soi, un corps 29 sous la forme d’un paquet de tôles. Des aimants permanents 30 sont implantés dans des cavités du corps 29, tel que montré sur les figures 1 et 4. Les aimants permanents 30 pourront être en terres rares ou en ferrite selon les applications et la puissance recherchée de la machine électrique 10. En outre, le rotor 12 comporte deux flasques 31 plaqués chacun contre une face d'extrémité axiale du rotor 12. Ces flasques 31 assurent une retenue axiale des aimants 30 et servent, le cas échéant, à équilibrer le rotor 12. [0030] The rotor 12 comprises, in a manner known per se, a body 29 in the form of a pack of sheets. Permanent magnets 30 are implanted in cavities of the body 29, as shown in FIGS. 1 and 4. The permanent magnets 30 may be of rare earths or of ferrite depending on the applications and the desired power of the electrical machine 10. In addition , the rotor 12 comprises two flanges 31 each pressed against an axial end face of the rotor 12. These flanges 31 provide axial retention of the magnets 30 and serve, where appropriate, to balance the rotor 12.
[0031 ] Par ailleurs, le stator 1 1 comporte un corps 33 ainsi qu’un bobinage 34. Comme cela est illustré par la figure 3, le corps de stator 33 est muni de dents 35 issues d'une périphérie interne d'une culasse 37 annulaire d'orientation axiale par rapport à l'axe X. Les dents 35 et la culasse 37 ont une fonction magnétique, dans la mesure où le flux magnétique de la machine électrique traverse ces éléments pour assurer son fonctionnement. Furthermore, the stator 1 1 comprises a body 33 as well as a coil 34. As illustrated in Figure 3, the stator body 33 is provided with teeth 35 from an internal periphery of a cylinder head 37 annular with axial orientation relative to the X axis. The teeth 35 and the yoke 37 have a magnetic function, insofar as the magnetic flux of the electric machine passes through these elements to ensure its operation.
[0032] Les dents 35 délimitent deux à deux des encoches 40 pour le montage du bobinage 34 du stator 1 1 . Ainsi, deux encoches 40 successives sont séparées par une dent 35. Les encoches 40 débouchent axialement dans les faces d'extrémité axiale et radialement vers l'intérieur du corps de stator 33. The teeth 35 define two by two of the notches 40 for mounting the coil 34 of the stator January 1. Thus, two successive notches 40 are separated by a tooth 35. The notches 40 open axially into the axial end faces and radially towards the inside of the stator body 33.
[0033] Suivant ce mode de réalisation, le corps de stator 33 est réalisé en deux parties, à savoir une première partie 33.1 formée par une portion interne 37.1 de la culasse 37 de laquelle sont issues les dents 35 et une deuxième partie 33.2, indépendante de la première partie 33.1 , formée par une portion externe 37.2 de la culasse 37. [0034] La première partie 33.1 , à savoir l'ensemble "portion interne 37.1 de la culasse 37 et dents 35", est constituée par un paquet de tôles réalisé par un empilement de feuilles de tôles maintenues sous forme de paquet au moyen d'un système de fixation adapté, tel que des rivets. According to this embodiment, the stator body 33 is made in two parts, namely a first part 33.1 formed by an internal portion 37.1 of the cylinder head 37 from which the teeth 35 and a second part 33.2, independent of the first part 33.1, formed by an outer portion 37.2 of the cylinder head 37. The first part 33.1, namely the whole "internal portion 37.1 of the cylinder head 37 and teeth 35", consists of a bundle of sheets produced by a stack of sheets of sheets held in the form of a package by means of a suitable fixing system, such as rivets.
[0035] La deuxième partie 33.2, à savoir la portion externe 37.2 de la culasse 37, est réalisée dans un matériau magnétique composite, ou matériau SMC pour "Soft Magnetic Composite" en anglais). Ce matériau contient de la poudre de matériau ferromagnétique, tel que de la poudre d'acier, dont les particules sont liées avec un matériau isolant, par exemple un matériau polymère résistant aux hautes températures. The second part 33.2, namely the outer portion 37.2 of the cylinder head 37, is made of a composite magnetic material, or SMC material for "Soft Magnetic Composite" in English). This material contains powder of ferromagnetic material, such as steel powder, the particles of which are bonded with an insulating material, for example a polymer material resistant to high temperatures.
[0036] La portion externe 37.2 de la culasse 37 est de préférence surmoulée autour de la portion interne 37.1 de la culasse 37. En variante, la portion externe 37.2 de la culasse 37 est fixée à la portion interne 37.1 de la culasse 37, notamment par emmanchement ou collage. The outer portion 37.2 of the cylinder head 37 is preferably molded around the internal portion 37.1 of the cylinder head 37. Alternatively, the outer portion 37.2 of the cylinder head 37 is fixed to the internal portion 37.1 of the cylinder head 37, in particular by fitting or gluing.
[0037] Dans sa partie active, c’est-à-dire la partie dans laquelle circule un flux magnétique utile pour le fonctionnement de la machine électrique 10, la portion externe 37.2 de la culasse 37 présente une épaisseur comprise entre 2mm et 4mm et vaut de préférence de l'ordre de 3mm. La portion interne 37.1 de la culasse 37 présente une épaisseur comprise entre 1 5mm et 3mm, et vaut de préférence de l'ordre de 2mm. In its active part, that is to say the part in which circulates a magnetic flux useful for the operation of the electrical machine 10, the outer portion 37.2 of the cylinder head 37 has a thickness between 2mm and 4mm and is preferably of the order of 3mm. The internal portion 37.1 of the cylinder head 37 has a thickness of between 1 5mm and 3mm, and is preferably of the order of 2mm.
[0038] Le bobinage 34 représenté en figures 1 et 2 comporte un ensemble d'enroulements de phase traversant les encoches 40 et formant des chignons s'étendant en saillie de part et d'autre du corps de stator 33. Dans l'exemple représenté, le bobinage 34 est réalisé à partir d'éléments conducteurs en forme d'épingles reliés entre eux par exemple par soudage. Ces enroulements sont par exemple des enroulements triphasés ou doubles triphasés connectés en étoile ou en triangle. The coil 34 shown in Figures 1 and 2 comprises a set of phase windings passing through the notches 40 and forming buns extending projecting on either side of the stator body 33. In the example shown , the coil 34 is made from conductive elements in the form of pins connected together for example by welding. These windings are for example three-phase or double three-phase windings connected in star or delta.
[0039] Afin d'assurer le refroidissement de la machine électrique 10, une chambre de refroidissement 41 est disposée autour du corps de stator 33, tel que montré sur la figure 1 . La chambre de refroidissement 41 pourra présenter avantageusement une forme annulaire. La chambre de refroidissement 41 est munie d'une entrée 42 et d'une sortie 43 de liquide de refroidissement (cf. figure 2) pour permettre une circulation du liquide de refroidissement à l'intérieur de la chambre de refroidissement 41 autour du corps de stator 33. In order to ensure the cooling of the electric machine 10, a cooling chamber 41 is arranged around the stator body 33, as shown in FIG. 1. The cooling chamber 41 may advantageously have an annular shape. The cooling chamber 41 is provided with an inlet 42 and a cooling liquid outlet 43 (see FIG. 2) to allow circulation of the cooling liquid inside the cooling chamber 41 around the stator body 33.
[0040] La chambre de refroidissement 41 est délimitée au moins en partie d'une part par une périphérie externe de la culasse 37 du corps de stator 33 et d'autre part par une périphérie interne d'un des paliers. En l'occurrence, la chambre de refroidissement 41 est délimitée au moins en partie d'une part par une périphérie externe de la portion externe 37.2 de la culasse 37 et d'autre part par une périphérie interne du palier arrière 16. The cooling chamber 41 is delimited at least in part on the one hand by an outer periphery of the yoke 37 of the stator body 33 and on the other hand by an inner periphery of one of the bearings. In this case, the cooling chamber 41 is delimited at least in part on the one hand by an outer periphery of the outer portion 37.2 of the cylinder head 37 and on the other hand by an inner periphery of the rear bearing 16.
[0041 ] Ainsi, le liquide de refroidissement, tel que de l'eau ou de l'huile ou tout autre liquide à fort pouvoir caloporteur adapté à l'application, étant en contact direct avec le corps de stator 33, l'extraction des calories générées par le courant circulant dans le bobinage 34 est optimale. [0041] Thus, the cooling liquid, such as water or oil or any other liquid with a high heat transfer capacity suitable for the application, being in direct contact with the stator body 33, the extraction of calories generated by the current flowing in the coil 34 is optimal.
[0042] La portion externe 37.2 de la culasse 37 comporte un épaulement 45 défini par une différence de diamètre externe constituant une paroi d'extrémité axiale de la chambre de refroidissement 41 . The outer portion 37.2 of the cylinder head 37 comprises a shoulder 45 defined by a difference in external diameter constituting an axial end wall of the cooling chamber 41.
[0043] Le palier arrière 16 comporte une périphérie interne étagée en diamètre ayant un épaulement 46 constituant l'autre paroi d'extrémité axiale de la chambre de refroidissement 41 . La périphérie interne du palier arrière 16 comporte également un épaulement 47 constituant une butée de mise en place axiale pour une extrémité axiale du corps de stator 33. The rear bearing 16 comprises an internal periphery stepped in diameter having a shoulder 46 constituting the other axial end wall of the cooling chamber 41. The internal periphery of the rear bearing 16 also comprises a shoulder 47 constituting an axial positioning stop for an axial end of the stator body 33.
[0044] L'étanchéité de la chambre de refroidissement 41 est assurée par des joints 49, notamment de type torique, disposés chacun dans une rainure 50 correspondante ménagée dans la portion externe 37.2 de la culasse 37. En variante, les rainures 50 de réception des joints 49 pourront être prévues dans la périphérie interne du palier arrière 16. The sealing of the cooling chamber 41 is provided by seals 49, in particular of the O-ring type, each arranged in a corresponding groove 50 formed in the outer portion 37.2 of the cylinder head 37. As a variant, the receiving grooves 50 seals 49 may be provided in the internal periphery of the rear bearing 16.
[0045] De préférence, un muret 51 permet de séparer l'entrée 42 de liquide de refroidissement et la sortie 43 de liquide de refroidissement afin de favoriser un renouvellement du liquide de refroidissement dans la chambre 41 . [0046] En variante, dans le mode de réalisation des figures 4 et 5, le corps de stator 33 est réalisé entièrement dans un matériau magnétique composite. Le stator 11 pourra comporter un bobinage 34 réalisé à partir de fils continus ou d'épingles comme précédemment, ou à partir de bobines individuelles 53 enroulées autour des dents 35 du stator 1 1 par l'intermédiaire d'un isolant de bobine 54, tel que cela est représenté sur la figure 5. Preferably, a wall 51 makes it possible to separate the inlet 42 of coolant and the outlet 43 of coolant in order to promote renewal of the coolant in the chamber 41. Alternatively, in the embodiment of Figures 4 and 5, the stator body 33 is made entirely of a composite magnetic material. The stator 11 may include a coil 34 made from continuous son or pins as above, or from individual coils 53 wound around the teeth 35 of the stator 1 1 by means of a coil insulator 54, such as as shown in Figure 5.
[0047] Bien entendu, la description qui précède a été donnée à titre d'exemple uniquement et ne limite pas le domaine de l'invention dont on ne sortirait pas en remplaçant les différents éléments par tous autres équivalents. [0048] En outre, les différentes caractéristiques, variantes, et/ou formes de réalisation de la présente invention peuvent être associées les unes avec les autres selon diverses combinaisons, dans la mesure où elles ne sont pas incompatibles ou exclusives les unes des autres. I Of course, the above description has been given by way of example only and does not limit the field of the invention, from which one would not depart by replacing the various elements with all other equivalents. In addition, the different characteristics, variants, and / or embodiments of the present invention can be associated with each other in various combinations, as long as they are not incompatible or exclusive of each other. I

Claims

Revendications Claims
1 . [Machine électrique tournante (10), notamment pour véhicule automobile, comportant: 1. [Rotating electric machine (10), in particular for a motor vehicle, comprising:
- un stator (1 1 ) comprenant un corps de stator (33) et un bobinage (34), ledit corps de stator (33) comportant une culasse (37) et des dents (35) issues d'une périphérie interne de la culasse (37), - a stator (1 1) comprising a stator body (33) and a coil (34), said stator body (33) comprising a yoke (37) and teeth (35) coming from an internal periphery of the yoke (37),
- au moins un palier (16) muni d'un logement (17) destiné à recevoir un moyen de guidage en rotation (19) d'un arbre (13), et - at least one bearing (16) provided with a housing (17) intended to receive a means for guiding in rotation (19) of a shaft (13), and
- une chambre de refroidissement (41 ) disposée autour du corps de stator (33) et dans laquelle circule un liquide de refroidissement, - a cooling chamber (41) arranged around the stator body (33) and in which a cooling liquid circulates,
caractérisée en ce qu'au moins une portion externe (37.2) de la culasse (37) est réalisée dans un matériau composite magnétique et en ce que la chambre de refroidissement (41 ) est délimitée au moins en partie d'une part par une périphérie externe de la culasse (37) du corps de stator (33) et d'autre part par une périphérie interne du palier (16). characterized in that at least one outer portion (37.2) of the cylinder head (37) is made of a magnetic composite material and in that the cooling chamber (41) is delimited at least in part on the one hand by a periphery external of the yoke (37) of the stator body (33) and on the other hand by an internal periphery of the bearing (16).
2. Machine électrique tournante selon la revendication 1 , caractérisée en ce que le corps de stator (33) est réalisé entièrement dans un matériau magnétique composite. 2. Rotating electric machine according to claim 1, characterized in that the stator body (33) is made entirely from a composite magnetic material.
3. Machine électrique tournante selon la revendication 1 , caractérisée en ce que le corps de stator (33) comporte une première partie (33.1 ) formée par une portion interne (37.1 ) de la culasse (37) et les dents (35) et une deuxième partie (33.2) formée par la portion externe (37.2) de la culasse (37) réalisée dans un matériau magnétique composite. 3. Rotating electric machine according to claim 1, characterized in that the stator body (33) comprises a first part (33.1) formed by an internal portion (37.1) of the cylinder head (37) and the teeth (35) and a second part (33.2) formed by the outer portion (37.2) of the yoke (37) made of a composite magnetic material.
4. Machine électrique tournante selon la revendication 3, caractérisée en ce que la portion externe (37.2) de la culasse (37) est surmoulée autour de la portion interne (37.1 ) de la culasse (37). 4. Rotating electric machine according to claim 3, characterized in that the outer portion (37.2) of the yoke (37) is molded around the inner portion (37.1) of the yoke (37).
5. Machine électrique tournante selon la revendication 3, caractérisée en ce que la portion externe (37.2) de la culasse (37) est fixée à la portion interne (37.1 ) de la culasse (37), notamment par emmanchement ou collage. 5. Rotating electric machine according to claim 3, characterized in that the outer portion (37.2) of the yoke (37) is fixed to the inner portion (37.1) of the yoke (37), in particular by fitting or gluing.
6. Machine électrique tournante selon l'une quelconque des revendications 1 à 5, caractérisée en ce que la portion externe (37.2) de la culasse (37) comporte au moins une rainure (50) destinée à recevoir un joint d'étanchéité (49). 6. Rotating electric machine according to any one of claims 1 to 5, characterized in that the outer portion (37.2) of the yoke (37) comprises at least one groove (50) intended to receive a seal (49).
7. Machine électrique tournante selon l'une quelconque des revendications 1 à 6, caractérisée en ce que la portion externe (37.2) de la culasse (37) comporte un épaulement (45) constituant une paroi d'extrémité axiale de la chambre de refroidissement (41 ). 7. Rotary electric machine according to any one of claims 1 to 6, characterized in that the outer portion (37.2) of the cylinder head (37) comprises a shoulder (45) constituting an axial end wall of the cooling chamber (41).
8. Machine électrique tournante selon l'une quelconque des revendications 1 à 7, caractérisée en ce que la périphérie interne du palier (16) comporte un épaulement (46) constituant une paroi d'extrémité axiale de la chambre de refroidissement (41 ). 8. A rotary electric machine according to any one of claims 1 to 7, characterized in that the internal periphery of the bearing (16) comprises a shoulder (46) constituting an axial end wall of the cooling chamber (41).
9. Machine électrique tournante selon l'une quelconque des revendications 1 à 8, caractérisée en ce que la périphérie interne du palier (16) comporte un épaulement (47) constituant une butée de mise en place axiale pour une extrémité axiale du corps de stator (33). 9. A rotary electrical machine according to any one of claims 1 to 8, characterized in that the internal periphery of the bearing (16) comprises a shoulder (47) constituting an axial positioning stop for an axial end of the stator body. (33).
10. Machine électrique tournante selon l'une quelconque des revendications 1 à 9, caractérisée en ce qu'elle comporte un muret (51 ) de séparation entre une entrée (42) de liquide de refroidissement et une sortie (43) de liquide de refroidissement. 10. A rotary electrical machine according to any one of claims 1 to 9, characterized in that it comprises a wall (51) separating an inlet (42) for cooling liquid and an outlet (43) for cooling liquid. .
1 1. Machine électrique tournante selon l'une quelconque des revendications 1 à 10, caractérisée en ce qu'une épaisseur de la portion externe (37.2) de la culasse (37) est comprise entre 2mm et 4mm et vaut de préférence de l'ordre de 3mm. 1 1. A rotary electric machine according to any one of claims 1 to 10, characterized in that a thickness of the outer portion (37.2) of the yoke (37) is between 2mm and 4mm and is preferably equal to the order of 3mm.
EP20729080.0A 2019-06-03 2020-06-02 Rotating electric machine provided with a cooling chamber Pending EP3977601A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1905840A FR3096844B1 (en) 2019-06-03 2019-06-03 ROTATING ELECTRIC MACHINE EQUIPPED WITH A COOLING CHAMBER
PCT/EP2020/065229 WO2020245122A1 (en) 2019-06-03 2020-06-02 Rotating electric machine provided with a cooling chamber

Publications (1)

Publication Number Publication Date
EP3977601A1 true EP3977601A1 (en) 2022-04-06

Family

ID=67875687

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20729080.0A Pending EP3977601A1 (en) 2019-06-03 2020-06-02 Rotating electric machine provided with a cooling chamber

Country Status (5)

Country Link
US (1) US20220320922A1 (en)
EP (1) EP3977601A1 (en)
CN (1) CN113924717A (en)
FR (1) FR3096844B1 (en)
WO (1) WO2020245122A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT240620Y1 (en) 1996-04-23 2001-04-02 Bamo Elettroutensili S R L POLAR PACK STRUCTURE, FOR DIALTERNATOR AND SIMILAR PERMANENT MAGNET ROTORS
GB2331859A (en) * 1997-11-28 1999-06-02 Asea Brown Boveri Magnetic cores for rotating electric machines
US7705495B2 (en) * 2006-11-17 2010-04-27 Gm Global Technology Operations, Inc. Cooling system for an electric motor
US9819246B2 (en) * 2015-01-13 2017-11-14 Regal Beloit America, Inc. Electrical machine and controller and methods of assembling the same
FR3046889A1 (en) * 2016-01-15 2017-07-21 Valeo Equip Electr Moteur ROTATING ELECTRICAL MACHINE WITH IMPROVED COOLING
FR3052932B1 (en) 2016-06-15 2021-01-22 Valeo Equip Electr Moteur ROTATING ELECTRIC MACHINE EQUIPPED WITH A MECHANICAL DECOUPLING ZONE

Also Published As

Publication number Publication date
WO2020245122A1 (en) 2020-12-10
CN113924717A (en) 2022-01-11
FR3096844B1 (en) 2021-06-25
US20220320922A1 (en) 2022-10-06
FR3096844A1 (en) 2020-12-04

Similar Documents

Publication Publication Date Title
WO2017194896A1 (en) Rotary electrical machine with optimised cooling
FR3057414A1 (en) ROTATING ELECTRIC MACHINE HAVING A COOLING CHAMBER FORMED BY A SEAL
FR3056840A1 (en) ROTARY ELECTRIC MACHINE WITH SEALED CONFIGURATION
FR3057118A1 (en) ROTATING ELECTRIC MACHINE WITH INTEGRATED THERMAL DISSIPATOR
EP3977601A1 (en) Rotating electric machine provided with a cooling chamber
EP3539200A1 (en) Rotating electrical machine comprising a speed reducer casing
EP3382856A1 (en) Rotary electrical machine with improved cooling
WO2003012954A2 (en) Homopolar electric machine
FR3033094B1 (en) ROTOR OF ROTATING ELECTRICAL MACHINE WITH SEGMENTED PERMANENT MAGNETS
FR3069980A1 (en) ROTATING ELECTRIC MACHINE HAVING A LIQUID DEFLECTOR
EP3520203B1 (en) Rotary electric machine provided with an interconnector with improved configuration
FR3060895B1 (en) ROTATING ELECTRICAL MACHINE WITH IMPROVED COOLING
EP3560079B1 (en) Rotating electrical machine provided with an electrical insulator between a heat sink and a bearing
EP3850727B1 (en) Rotating electrical machine provided with a bearing produced from two overmoulded parts
FR3086118A1 (en) ROTATING ELECTRIC MACHINE WITH REDUCED MASS ROTOR
FR3075501A1 (en) ROTATING ELECTRIC MACHINE HAVING A DEVICE FOR HOLDING A SENSOR SUPPORT FOR MEASURING THE ANGULAR POSITION OF THE ROTOR
FR3056843B1 (en) ROTATING ELECTRICAL MACHINE WITH IMPROVED SHAFT MOUNTING CONFIGURATION
WO2021099533A1 (en) Rotary electric machine with axial immobilization of the stator
WO2023111188A1 (en) Rotating electrical machine provided with a cooling chamber having an optimised configuration
FR3098056A1 (en) AIR-COOLED ROTATING ELECTRIC MACHINE
WO2023111036A1 (en) Rotary electrical machine comprising a cooling chamber
FR3132992A1 (en) ROTATING ELECTRIC MACHINE EQUIPPED WITH A FLANGE INCORPORATING PROTRUDING HEAT DISSIPATION ELEMENTS
WO2023194675A1 (en) Rotor for an electric motor provided with a cooling circuit
FR3120755A1 (en) Rotating electrical machine comprising a cooling chamber of a stator
WO2017182742A1 (en) Rotating electrical machine with contacts for connecting phase windings and terminals of a connector

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

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

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20211201

AK Designated contracting states

Kind code of ref document: A1

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

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230528