WO2016079426A2 - Electric machine - Google Patents

Electric machine Download PDF

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Publication number
WO2016079426A2
WO2016079426A2 PCT/FR2015/053117 FR2015053117W WO2016079426A2 WO 2016079426 A2 WO2016079426 A2 WO 2016079426A2 FR 2015053117 W FR2015053117 W FR 2015053117W WO 2016079426 A2 WO2016079426 A2 WO 2016079426A2
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WO
WIPO (PCT)
Prior art keywords
rotor
shaft
holding material
electric machine
forms
Prior art date
Application number
PCT/FR2015/053117
Other languages
French (fr)
Other versions
WO2016079426A3 (en
Inventor
Patrick LEBRASSEUR
Nicolas Martin
Franck Giraud
Mathieu Lallemant
François Machet
Original Assignee
Valeo Systemes De Controle Moteur
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Systemes De Controle Moteur filed Critical Valeo Systemes De Controle Moteur
Priority to EP15804172.3A priority Critical patent/EP3221950A2/en
Publication of WO2016079426A2 publication Critical patent/WO2016079426A2/en
Publication of WO2016079426A3 publication Critical patent/WO2016079426A3/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/16—Centering rotors within the stator; Balancing rotors

Definitions

  • the present invention relates to the field of electrical machines, and relates more particularly to an electrical machine comprising at least one stator and a rotor.
  • An electric machine has a rotor and a stator.
  • the rotor is mounted on a tree.
  • the stator has teeth around which the coils are wound. The supply of each of the coils allows the creation of a magnetic field in the stator, the rotor, also having teeth, is oriented along the field lines.
  • An example of an electric motor having a stator and a rotor is the variable reluctance motor.
  • these machines are generally used in electrical systems such as supercharged electric compressors.
  • these machines are used on the intake circuit to improve the efficiency of the vehicle, to overcome the latency of the conventional turbocharger at startup, or in the transient phases of the vehicle.
  • the air gap between the stator and rotor teeth is very important in terms of constancy. Indeed, the greater the variation of this gap on a lathe is important, the more the effect is negative on the performance of the machine.
  • This air gap is due to the game which is added to it.
  • the game is the result of all the defects of each piece and their assembly.
  • this game comes from the fact that the rotor is mounted tight on the shaft. A lack of concentricity between the inside diameter of the rotor and outside the shaft adds play to the gap. This causes a decrease in the performance of the electric motor.
  • the present invention therefore aims to overcome one or more of the disadvantages of the motor of the prior art by providing an electrical machine configured to limit variations in the gap between the rotor and the stator.
  • the present invention proposes an electric machine comprising a rotor, the rotor being tightly mounted on a rotatable shaft, a holding material being positioned between the rotor and the shaft.
  • this holding material makes it possible to eliminate the concentricity defects between the inside diameter of the rotor and the outside of the shaft, which limits the clearance at the gap.
  • this holding material makes it possible to create a thermal barrier between the rotor and the shaft and thus to other parts to which the shaft is connected.
  • the holding material is a material injected between an inner surface of the rotor and an outer surface of the shaft.
  • the holding material is resin metal or plastic.
  • the inner surface of the rotor comprises counterforms.
  • the outer surface of the shaft comprises counterforms.
  • the counterforms are all forms allowing the transmission of the forces of the rotor on the shaft.
  • the counterforms transmit the force of the rotor on the shaft allowing better adhesion between the holding material and the shaft.
  • the invention also relates to a method for obtaining an electric machine according to the invention, comprising the steps of:
  • overmolding is performed by injection of holding material according to the invention between the inner surface of the opening of the rotor and the outer surface of the shaft.
  • the invention also relates to the use of the electric machine according to the invention in an electric supercharger for a motor vehicle.
  • the invention also relates to an electric supercharger equipped with an electric machine according to the invention.
  • FIG. 1 is a schematic representation of an elevational view of a device according to the invention
  • FIG. 2 is a schematic representation of an element of the device according to the invention.
  • FIG. 3 is a schematic representation of another element of the device according to the invention.
  • FIG. 4 is a schematic representation of another element of the device according to the invention.
  • FIG. 5 is a schematic representation of a sectional view of a device according to the invention.
  • FIG. 6 is a schematic representation of a sectional view of an electric machine according to the invention.
  • the present invention relates to an electric machine 1 illustrated in FIGS. 1 and 6.
  • the machine 1 comprises at least one stator 2 and one rotor 3.
  • the rotor 3 is disposed inside the stator 2. More precisely, the rotor 3 is disposed in a space formed in the center of the stator 2.
  • the electrical machine is a continuous or alternating current machine, synchronous or asynchronous or any type of electric machine of the same type.
  • the electrical machine is a variable reluctance motor (also called SRM machine for Switched Reluctance Motor according to English terminology).
  • the electric machine is a permanent magnet motor.
  • the stator 2 is formed of at least one body.
  • the stator 2 is formed of several bodies.
  • the stator is also made up of several teeth.
  • the teeth are disposed on the inner face of the stator body defining the space in which the rotor is located.
  • the stator has n teeth, n being between 4 and 12, and very preferably equal to 6.
  • Around each of the teeth is disposed a winding which thus forms the stator coils. The supply of each of the coils allows the creation of a magnetic field in the stator.
  • the rotor 3 comprises rotor teeth 32.
  • the number of teeth of the rotor 3 is between 2 and 8, and preferably is equal to 4.
  • the rotor comprises at its center a longitudinal opening 31. This opening 31 is traversed by a shaft 5 mounted in rotation.
  • the shaft 5, illustrated in FIGS. 1, 4 and 5 is connected to the rotor 3 of the electric machine which allows the rotation drive of the shaft 5, and an end of the shaft 5 is connected to for example a wheel, not shown, of an electric compressor.
  • the rotor 3 is thus mounted tight on the shaft 5. It is the rotor 3 which allows the shaft 5 to be rotated.
  • a holding material 6, illustrated in FIGS. 1, 3 and 5 is disposed between the rotor 3 and the shaft 5. More specifically, the holding material 6 is disposed between the inner surface of the aperture 31 of the rotor and the outer surface of the shaft 5.
  • Fig. 3 shows the insulated holding material 6, the rotor and the shaft. This state does not exist and is only a representation to allow a better understanding of the invention.
  • the holding material 6 is injected between the inner surface of the opening 31 of the rotor and the outer surface of the shaft 5.
  • this holding material 6 makes it possible to eliminate the concentricity defects between the inside diameter of the rotor 3 and the outside of the shaft 5, which limits the clearance at the air gap 4, illustrated in FIG. 6, between the teeth. stator and rotor and thus limits the variation of this gap.
  • this holding material 6 makes it possible to create a thermal barrier between the rotor and the shaft 5. This thermal barrier thus makes it possible to limit heat transfer to other parts to which the shaft is connected, and for example the guiding parts in rotation.
  • the holding material 6 is resin
  • the holding material 6 is metal
  • the holding material 6 is plastic.
  • the holding material 6 is a seal, and for example a liquid seal.
  • the inner surface of the rotor 3 comprises counter-forms 61.
  • the counter-forms 61 are all forms allowing the transmission of the forces of the shaft 5 on the rotor 3.
  • the counter-forms 61 of the rotor 3 are longitudinal ribs oriented along the longitudinal axis X of the shaft 5, rectilinear or not.
  • the counter-forms 61 of the rotor 3 are longitudinal grooves oriented along the longitudinal axis X of the shaft 5, rectilinear or not.
  • the counter-forms 61 transmit the force of the rotor 3 on the shaft 5 by allowing better adhesion between the holding material and the shaft. Indeed, when the holding material 6 is injected, it fills all the spaces between the outer surface of the shaft and the inner surface of the rotor. In this way, when the rotor and the holding material rotate, the better adhesion of the holding material with the shaft via the counter-forms 61 ensures a total transmission of the forces of the rotor 3 on the shaft 5.
  • the outer surface of the shaft 5 also comprises counter-forms 51.
  • counterforms 51 are all forms allowing the transmission of the forces of the rotor 3 on the shaft 5.
  • the counter-forms 51 of the shaft 5 are longitudinal ribs oriented along the longitudinal axis X of the shaft 5, rectilinear or not.
  • the counter-forms 51 of the shaft 5 are longitudinal grooves oriented along the longitudinal axis X of the shaft 5, rectilinear or not.
  • the counter-forms 51 of the shaft 5 have the same role and the same effects as the counter-forms 61 of the rotor.
  • the rotor 3 and the shaft 5 comprise counter-forms 51, 61 as described above.
  • the combination of the counterforms 61 of the rotor 3 and counterforms 51 of the shaft 5 makes it possible to increase more significantly the adhesion of the holding material 6 to the shaft and the rotor, and thus to to improve more significantly the transmission of the forces of the rotor 3 on the shaft 5, compared to the case where only the shaft 5 or the rotor 3 has counterforms.
  • the method according to the invention making it possible to obtain a machine according to the invention, consists first of all in positioning the rotor 3 with respect to the shaft 5. The positioning being carried out with respect to a reference pre-defined on the 5. The shaft between the shaft 5 and the rotor 3 is then formed by overmolding the rotor 3 and the shaft 5. More precisely, the overmolding is performed by injection of the holding material 6 according to the invention between the inner surface of the opening 31 of the rotor and the outer surface of the shaft 5.
  • This method according to the invention makes it possible to obtain an electric machine 1 whose shaft 5 and rotor 3 are overmolded.
  • the invention also relates to the use of such a machine 1 according to the invention in an electric supercharger for a motor vehicle.
  • the invention also relates to an electric supercharger equipped with such a machine 1 according to the invention. More specifically, the invention also relates to an electric compressor equipped with a variable reluctance motor according to the invention.
  • This electric supercharger compressor for a motor vehicle comprises a compression wheel and an electric machine according to the invention for driving the compression wheel in rotation.

Abstract

The present invention relates to an electric compressor provided with an electric machine (1) including a rotor (3), the rotor being mounted clamped on a shaft (5) which is rotatably mobile (X), a supporting material (6) being positioned between the rotor (3) and the shaft (5). The present invention likewise relates to the method for obtaining the electric machine (1) according to the invention.

Description

MACHINE ELECTRIQUE  ELECTRIC MACHINE
La présente invention se rapporte au domaine des machines électriques, et se rapporte plus particulièrement à une machine électrique comportant au moins un stator et un rotor. The present invention relates to the field of electrical machines, and relates more particularly to an electrical machine comprising at least one stator and a rotor.
Une machine électrique comporte un rotor et un stator. Le rotor est monté sur un arbre. Le stator comporte des dents autour desquelles sont enroulées les bobines. L'alimentation de chacune des bobines permet la création d'un champ magnétique dans le stator, le rotor, comportant également des dents, s'oriente suivant les lignes de champ. Un exemple de moteur électrique comportant un stator et un rotor est le moteur à reluctance variable.  An electric machine has a rotor and a stator. The rotor is mounted on a tree. The stator has teeth around which the coils are wound. The supply of each of the coils allows the creation of a magnetic field in the stator, the rotor, also having teeth, is oriented along the field lines. An example of an electric motor having a stator and a rotor is the variable reluctance motor.
Dans le domaine de l'automobile, ces machines sont généralement utilisées dans des systèmes électriques telles que des compresseurs électriques suralimentés. Par exemple, ces machines sont utilisées sur le circuit d'admission pour améliorer le rendement du véhicule, pallier le temps de latence du turbocompresseur classique au démarrage, ou dans les phases transitoires du véhicule.  In the automotive field, these machines are generally used in electrical systems such as supercharged electric compressors. For example, these machines are used on the intake circuit to improve the efficiency of the vehicle, to overcome the latency of the conventional turbocharger at startup, or in the transient phases of the vehicle.
Dans une machine électrique à reluctance variable, l'entrefer entre les dents du stator et rotor est très important en termes de constance. En effet, plus la variation de cet entrefer sur un tour est important, plus l'effet est négatif sur les performances de la machine.  In an electrical machine with variable reluctance, the air gap between the stator and rotor teeth is very important in terms of constancy. Indeed, the greater the variation of this gap on a lathe is important, the more the effect is negative on the performance of the machine.
La variation de cet entrefer est due au jeu qui s'y ajoute. Le jeu est la résultante de l'ensemble des défauts de chaque pièce et de leur assemblage. Notamment ce jeu, provient du fait que le rotor est monté serré sur l'arbre. Un défaut de concentricité entre le diamètre intérieur du rotor et extérieur de l'arbre ajoute du jeu à l'entrefer. Ceci entraine une baisse des performances du moteur électrique.  The variation of this air gap is due to the game which is added to it. The game is the result of all the defects of each piece and their assembly. In particular this game, comes from the fact that the rotor is mounted tight on the shaft. A lack of concentricity between the inside diameter of the rotor and outside the shaft adds play to the gap. This causes a decrease in the performance of the electric motor.
La présente invention a donc pour objet de pallier un ou plusieurs des inconvénients des moteur de l'art antérieur en proposant un machine électrique configurée pour limiter les variations au niveau de l'entrefer entre le rotor et le stator. Pour cela la présente invention propose, une machine électrique comportant un rotor, le rotor étant monté serré sur un arbre mobile en rotation, un matériau de maintien étant positionné entre le rotor et l'arbre. The present invention therefore aims to overcome one or more of the disadvantages of the motor of the prior art by providing an electrical machine configured to limit variations in the gap between the rotor and the stator. For this, the present invention proposes an electric machine comprising a rotor, the rotor being tightly mounted on a rotatable shaft, a holding material being positioned between the rotor and the shaft.
La présence de ce matériau de maintien permet de supprimer les défauts de concentricité entre le diamètre intérieur du rotor et extérieur de l'arbre, ce qui limite le jeu au niveau de l'entrefer.  The presence of this holding material makes it possible to eliminate the concentricity defects between the inside diameter of the rotor and the outside of the shaft, which limits the clearance at the gap.
La présence de ce matériau de maintien permet de créer une barrière thermique entre le rotor et l'arbre et ainsi vers d'autres pièces auxquelles est lié l'arbre.  The presence of this holding material makes it possible to create a thermal barrier between the rotor and the shaft and thus to other parts to which the shaft is connected.
Selon un mode de réalisation de l'invention, le matériau de maintien est un matériau injecté entre une surface interne du rotor et une surface externe de l'arbre.  According to one embodiment of the invention, the holding material is a material injected between an inner surface of the rotor and an outer surface of the shaft.
Selon un mode de réalisation de l'invention, le matériau de maintien est de la résine du métal ou du plastique.  According to one embodiment of the invention, the holding material is resin metal or plastic.
Selon un mode de réalisation de l'invention, la surface interne du rotor comporte des contre-formes.  According to one embodiment of the invention, the inner surface of the rotor comprises counterforms.
Selon un mode de réalisation de l'invention, la surface externe de l'arbre comporte des contre-formes.  According to one embodiment of the invention, the outer surface of the shaft comprises counterforms.
Selon un mode de réalisation de l'invention, les contre-formes sont toutes formes permettant la transmission des efforts du rotor sur l'arbre.  According to one embodiment of the invention, the counterforms are all forms allowing the transmission of the forces of the rotor on the shaft.
Les contre-formes transmettent l'effort du rotor sur l'arbre en permettant une meilleure adhésion entre le matériau de maintien et l'arbre.  The counterforms transmit the force of the rotor on the shaft allowing better adhesion between the holding material and the shaft.
L'invention concerne également un procédé d'obtention d'une machine électrique selon l'invention, comportant les étapes de :  The invention also relates to a method for obtaining an electric machine according to the invention, comprising the steps of:
positionnement du rotor par rapport à l'arbre,  rotor positioning relative to the shaft,
maintien de l'arbre et du rotor par surmoulage du rotor et de l'arbre.  maintaining the shaft and the rotor by overmolding the rotor and the shaft.
Selon un mode de réalisation de l'invention, le surmoulage est réalisé par injection de matériau de maintien selon l'invention entre la surface interne de l'ouverture du rotor et la surface externe de l'arbre.  According to one embodiment of the invention, overmolding is performed by injection of holding material according to the invention between the inner surface of the opening of the rotor and the outer surface of the shaft.
L'invention concerne également l'utilisation de la machine électrique selon l'invention dans un compresseur de suralimentation électrique pour véhicule automobile. L'invention concerne également un compresseur de suralimentation électrique équipé d'une machine électrique selon l'invention. The invention also relates to the use of the electric machine according to the invention in an electric supercharger for a motor vehicle. The invention also relates to an electric supercharger equipped with an electric machine according to the invention.
D'autres buts, caractéristiques et avantages de l'invention seront mieux compris et apparaîtront plus clairement à la lecture de la description faite, ci-après, en se référant aux figures annexées, données à titre d'exemple et dans lesquelles:  Other objects, features and advantages of the invention will be better understood and will appear more clearly on reading the description given hereinafter with reference to the appended figures given by way of example and in which:
- la figure 1 est une représentation schématique d'une vue en élévation d'un dispositif selon l'invention,  FIG. 1 is a schematic representation of an elevational view of a device according to the invention,
- la figure 2 est une représentation schématique d'un élément du dispositif selon l'invention,  FIG. 2 is a schematic representation of an element of the device according to the invention,
- la figure 3 est une représentation schématique d'un autre élément du dispositif selon l'invention,  FIG. 3 is a schematic representation of another element of the device according to the invention,
- la figure 4 est une représentation schématique d'un autre élément du dispositif selon l'invention,  FIG. 4 is a schematic representation of another element of the device according to the invention,
- la figure 5 est une représentation schématique d'une vue en coupe d'un dispositif selon l'invention,  FIG. 5 is a schematic representation of a sectional view of a device according to the invention,
- la figure 6 est une représentation schématique d'une vue en coupe d'une machine électrique selon l'invention.  - Figure 6 is a schematic representation of a sectional view of an electric machine according to the invention.
La présente invention concerne une machine électrique 1 illustrée figure 1 et 6. La machine 1 comporte au moins un stator 2 et un rotor 3. Le rotor 3 est disposé à l'intérieur du stator 2. Plus précisément, le rotor 3 est disposé dans un espace formé au centre du stator 2. The present invention relates to an electric machine 1 illustrated in FIGS. 1 and 6. The machine 1 comprises at least one stator 2 and one rotor 3. The rotor 3 is disposed inside the stator 2. More precisely, the rotor 3 is disposed in a space formed in the center of the stator 2.
Selon un mode de réalisation de l'invention, la machine électrique est une machine à courant continue ou alternatif, synchrone ou asynchrone ou tout type de machine électrique du même type.  According to one embodiment of the invention, the electrical machine is a continuous or alternating current machine, synchronous or asynchronous or any type of electric machine of the same type.
Plus précisément, selon un mode de réalisation de l'invention, la machine électrique est un moteur à reluctance variable (également appelée machine SRM pour Switched Reluctance Motor selon la terminologie anglaise).  More specifically, according to one embodiment of the invention, the electrical machine is a variable reluctance motor (also called SRM machine for Switched Reluctance Motor according to English terminology).
Selon un autre mode de réalisation de l'invention, la machine électrique est un moteur à aimants permanents. Le stator 2, est formé d'au moins un corps. Selon un mode de réalisation de l'invention, le stator 2 est formé de plusieurs corps. Le stator est également formé de plusieurs dents. Les dents sont disposées sur la face interne du corps du stator délimitant l'espace dans lequel se trouve le rotor. Le stator comporte n dents, n étant compris entre 4 et 12, et de manière très préférée égale à 6. Autour de chacune des dents est disposé un bobinage qui forme ainsi les bobines du stator. L'alimentation de chacune des bobines permet la création d'un champ magnétique dans le stator. According to another embodiment of the invention, the electric machine is a permanent magnet motor. The stator 2 is formed of at least one body. According to one embodiment of the invention, the stator 2 is formed of several bodies. The stator is also made up of several teeth. The teeth are disposed on the inner face of the stator body defining the space in which the rotor is located. The stator has n teeth, n being between 4 and 12, and very preferably equal to 6. Around each of the teeth is disposed a winding which thus forms the stator coils. The supply of each of the coils allows the creation of a magnetic field in the stator.
Selon un mode de réalisation de l'invention illustrée figures 1 et 2, le rotor 3 comporte des dents 32 de rotor. Le nombre de dents du rotor 3 est compris entre 2 et 8, et de manière préférée est égale à 4.  According to one embodiment of the invention illustrated in FIGS. 1 and 2, the rotor 3 comprises rotor teeth 32. The number of teeth of the rotor 3 is between 2 and 8, and preferably is equal to 4.
Le rotor comporte en son centre une ouverture 31 longitudinale. Cette ouverture 31 est traversée par un arbre 5 monté en rotation.  The rotor comprises at its center a longitudinal opening 31. This opening 31 is traversed by a shaft 5 mounted in rotation.
Selon un mode de réalisation de l'invention, l'arbre 5, illustré figures 1, 4 et 5, est connectée au rotor 3 de la machine électrique ce qui permet l'entraînement en rotation de l'arbre 5, et une extrémité de l'arbre 5 est connectée à par exemple une roue, non illustrée, d'un compresseur électrique.  According to one embodiment of the invention, the shaft 5, illustrated in FIGS. 1, 4 and 5, is connected to the rotor 3 of the electric machine which allows the rotation drive of the shaft 5, and an end of the shaft 5 is connected to for example a wheel, not shown, of an electric compressor.
Le rotor 3 est ainsi monté serré sur l'arbre 5. C'est le rotor 3 qui permet à l'arbre 5 d'être mis en rotation.  The rotor 3 is thus mounted tight on the shaft 5. It is the rotor 3 which allows the shaft 5 to be rotated.
Dans le cadre de l'invention, un matériau de maintien 6, illustré figure 1, 3 et 5, est disposé entre le rotor 3 et l'arbre 5. Plus précisément, le matériau de maintien 6 est disposé entre la surface interne de l'ouverture 31 du rotor et la surface externe de l'arbre 5. La figure 3 représente le matériau de maintien 6 isolé, du rotor et de l'arbre. Cet état n'existe pas et est seulement une représentation pour permettre une meilleure compréhension de l'invention.  In the context of the invention, a holding material 6, illustrated in FIGS. 1, 3 and 5, is disposed between the rotor 3 and the shaft 5. More specifically, the holding material 6 is disposed between the inner surface of the aperture 31 of the rotor and the outer surface of the shaft 5. Fig. 3 shows the insulated holding material 6, the rotor and the shaft. This state does not exist and is only a representation to allow a better understanding of the invention.
Selon un mode de réalisation de l'invention, le matériau de maintien 6 est injecté entre la surface interne de l'ouverture 31 du rotor et la surface externe de l'arbre 5.  According to one embodiment of the invention, the holding material 6 is injected between the inner surface of the opening 31 of the rotor and the outer surface of the shaft 5.
La présence de ce matériau de maintien 6 permet de supprimer les défauts de concentricité entre le diamètre intérieur du rotor 3 et extérieur de l'arbre 5, ce qui limite le jeu au niveau de l'entrefer 4, illustré figure 6, entre les dents du stator et rotor et ainsi limite la variation de cet entrefer. De plus, la présence de ce matériau de maintien 6 permet de créer une barrière thermique entre le rotor et l'arbre 5. Cette barrière thermique permet ainsi limiter le transfert thermique vers d'autres pièces auxquelles est lié l'arbre, et par exemple les pièces de guidage en rotation. The presence of this holding material 6 makes it possible to eliminate the concentricity defects between the inside diameter of the rotor 3 and the outside of the shaft 5, which limits the clearance at the air gap 4, illustrated in FIG. 6, between the teeth. stator and rotor and thus limits the variation of this gap. In addition, the presence of this holding material 6 makes it possible to create a thermal barrier between the rotor and the shaft 5. This thermal barrier thus makes it possible to limit heat transfer to other parts to which the shaft is connected, and for example the guiding parts in rotation.
Selon un mode de réalisation de l'invention, le matériau de maintien 6 est de la résine.  According to one embodiment of the invention, the holding material 6 is resin.
Selon un mode de réalisation de l'invention, le matériau de maintien 6 est du métal.  According to one embodiment of the invention, the holding material 6 is metal.
Selon un mode de réalisation de l'invention, le matériau de maintien 6 est du plastique.  According to one embodiment of the invention, the holding material 6 is plastic.
Selon un mode de réalisation de l'invention, le matériau de maintien 6 est un joint, et par exemple un joint liquide.  According to one embodiment of the invention, the holding material 6 is a seal, and for example a liquid seal.
Selon un mode de réalisation de l'invention, illustré figures 2 et 5, la surface interne du rotor 3 comporte des contre-formes 61. Dans le cadre de l'invention les contre-formes 61 sont toutes formes permettant la transmission des efforts de l'arbre 5 sur le rotor 3.  According to one embodiment of the invention, illustrated in FIGS. 2 and 5, the inner surface of the rotor 3 comprises counter-forms 61. In the context of the invention, the counter-forms 61 are all forms allowing the transmission of the forces of the shaft 5 on the rotor 3.
Selon un mode de réalisation de l'invention, les contre-formes 61 du rotor 3 sont des nervures longitudinales orientées selon l'axe longitudinale X de l'arbre 5, rectilignes ou pas.  According to one embodiment of the invention, the counter-forms 61 of the rotor 3 are longitudinal ribs oriented along the longitudinal axis X of the shaft 5, rectilinear or not.
Selon un mode de réalisation de l'invention, les contre-formes 61 du rotor 3 sont des rainures longitudinales orientées selon l'axe longitudinale X de l'arbre 5, rectilignes ou pas.  According to one embodiment of the invention, the counter-forms 61 of the rotor 3 are longitudinal grooves oriented along the longitudinal axis X of the shaft 5, rectilinear or not.
Les contre-formes 61 transmettent l'effort du rotor 3 sur l'arbre 5 en permettant une meilleure adhésion entre le matériau de maintien et l'arbre. En effet, lorsque le matériau de maintien 6 est injecté, il comble tous les espaces entre la surface externe de l'arbre et la surface interne du rotor. De cette façon lorsque le rotor et le matériau de maintien tournent, la meilleure adhésion du matériau de maintien avec l'arbre via les contre-formes 61 assure une transmission totale des efforts du rotor 3 sur l'arbre 5.  The counter-forms 61 transmit the force of the rotor 3 on the shaft 5 by allowing better adhesion between the holding material and the shaft. Indeed, when the holding material 6 is injected, it fills all the spaces between the outer surface of the shaft and the inner surface of the rotor. In this way, when the rotor and the holding material rotate, the better adhesion of the holding material with the shaft via the counter-forms 61 ensures a total transmission of the forces of the rotor 3 on the shaft 5.
Selon un mode de réalisation de l'invention, illustré figures 4 et 5, la surface externe de l'arbre 5 comporte également des contre-formes 51. Dans le cadre de l'invention les contre-formes 51 sont toutes formes permettant la transmission des efforts du rotor 3 sur l'arbre 5. According to one embodiment of the invention, illustrated in FIGS. 4 and 5, the outer surface of the shaft 5 also comprises counter-forms 51. In the context of the invention counterforms 51 are all forms allowing the transmission of the forces of the rotor 3 on the shaft 5.
Selon un mode de réalisation de l'invention, les contre-formes 51 de l'arbre 5 sont des nervures longitudinales orientées selon l'axe longitudinale X de l'arbre 5, rectilignes ou pas.  According to one embodiment of the invention, the counter-forms 51 of the shaft 5 are longitudinal ribs oriented along the longitudinal axis X of the shaft 5, rectilinear or not.
Selon un mode de réalisation de l'invention, les contre-formes 51 de l'arbre 5 sont des rainures longitudinales orientées selon l'axe longitudinale X de l'arbre 5, rectilignes ou pas.  According to one embodiment of the invention, the counter-forms 51 of the shaft 5 are longitudinal grooves oriented along the longitudinal axis X of the shaft 5, rectilinear or not.
Les contre-formes 51 de l'arbre 5 ont le même rôle et les mêmes effets que les contre-formes 61 du rotor.  The counter-forms 51 of the shaft 5 have the same role and the same effects as the counter-forms 61 of the rotor.
Selon un mode de réalisation de l'invention, le rotor 3 et l'arbre 5 comportent des contre-formes 51, 61 telles que décrites précédemment. L'association des contre-formes 61 du rotor 3 et des contre-formes 51 de l'arbre 5 permet d'augmenter de façon plus importante l'adhésion du matériau de maintien 6 sur l'arbre et le rotor, et ainsi d'améliorer de façon plus importante la transmission des efforts du rotor 3 sur l'arbre 5, par rapport au cas où seul l'arbre 5 ou le rotor 3 comporte des contre-formes.  According to one embodiment of the invention, the rotor 3 and the shaft 5 comprise counter-forms 51, 61 as described above. The combination of the counterforms 61 of the rotor 3 and counterforms 51 of the shaft 5 makes it possible to increase more significantly the adhesion of the holding material 6 to the shaft and the rotor, and thus to to improve more significantly the transmission of the forces of the rotor 3 on the shaft 5, compared to the case where only the shaft 5 or the rotor 3 has counterforms.
Le procédé selon l'invention, permettant d'obtenir une machine selon l'invention, consiste tout d'abord à positionner le rotor 3 par rapport à l'arbre 5. Le positionnement étant réalisé par rapport à une référence pré-défini sur l'arbre 5. Le maintien entre l'arbre 5 et le rotor 3 est ensuite réalisé par surmoulage du rotor 3 et de l'arbre 5. Plus précisément, le surmoulage est réalisé par injection de matériau de maintien 6 selon l'invention entre la surface interne de l'ouverture 31 du rotor et la surface externe de l'arbre 5.  The method according to the invention, making it possible to obtain a machine according to the invention, consists first of all in positioning the rotor 3 with respect to the shaft 5. The positioning being carried out with respect to a reference pre-defined on the 5. The shaft between the shaft 5 and the rotor 3 is then formed by overmolding the rotor 3 and the shaft 5. More precisely, the overmolding is performed by injection of the holding material 6 according to the invention between the inner surface of the opening 31 of the rotor and the outer surface of the shaft 5.
Ce procédé selon l'invention permet d'obtenir une machine électrique 1 dont l'arbre 5 et le rotor 3 sont surmoulés.  This method according to the invention makes it possible to obtain an electric machine 1 whose shaft 5 and rotor 3 are overmolded.
L'invention concerne également l'utilisation d'une telle machine 1 selon l'invention dans un compresseur de suralimentation électrique pour véhicule automobile.  The invention also relates to the use of such a machine 1 according to the invention in an electric supercharger for a motor vehicle.
L'invention concerne également un compresseur de suralimentation électrique équipé d'une telle machine 1 selon l'invention. Plus précisément, l'invention concerne également un compresseur électrique équipé d'un moteur à reluctance variable selon l'invention. Ce compresseur électrique de suralimentation pour véhicule automobile, comporte une roue de compression et une machine électrique selon l'invention, pour entraîner la roue de compression en rotation. The invention also relates to an electric supercharger equipped with such a machine 1 according to the invention. More specifically, the invention also relates to an electric compressor equipped with a variable reluctance motor according to the invention. This electric supercharger compressor for a motor vehicle comprises a compression wheel and an electric machine according to the invention for driving the compression wheel in rotation.
La portée de la présente invention ne se limite pas aux détails donnés ci-dessus et permet des modes de réalisation sous de nombreuses autres formes spécifiques sans s'éloigner du domaine d'application de l'invention. Par conséquent, les présents modes de réalisation doivent être considérés à titre d'illustration, et peuvent être modifiés sans toutefois sortir de la portée définie par les revendications. The scope of the present invention is not limited to the details given above and allows embodiments in many other specific forms without departing from the scope of the invention. Therefore, the present embodiments should be considered by way of illustration, and may be modified without departing from the scope defined by the claims.

Claims

REVENDICATIONS
1. Compresseur de suralimentation électrique équipé d'une machine électrique (1) comportant un rotor, le rotor étant monté serré sur un arbre mobile en rotation, caractérisé en ce qu'un matériau de maintien (6) est positionné entre le rotor (3) et l'arbre (5). An electric supercharger equipped with an electric machine (1) having a rotor, the rotor being tightly mounted on a rotatable shaft, characterized in that a holding material (6) is positioned between the rotor (3). ) and the shaft (5).
2. Compresseur selon la revendication 1, dans laquelle le matériau de maintien (6) est un matériau injecté entre une surface interne du rotor (3) et une surface externe de l'arbre (5).  2. The compressor of claim 1, wherein the holding material (6) is a material injected between an inner surface of the rotor (3) and an outer surface of the shaft (5).
3. Compresseur selon une des revendications 1 à 2, dans laquelle le matériau de maintien (6) est de la résine, du métal ou du plastique.  3. Compressor according to one of claims 1 to 2, wherein the holding material (6) is resin, metal or plastic.
4. Compresseur selon une des revendications 1 à 3, dans laquelle la surface interne du rotor (3) comporte des contre-formes (61).  4. Compressor according to one of claims 1 to 3, wherein the inner surface of the rotor (3) comprises against-forms (61).
5. Compresseur selon une des revendications 1 à 4, dans laquelle la surface externe de l'arbre (5) comporte des contre-formes (51) ayant toutes formes permettant la transmission des efforts du rotor (3) sur l'arbre (5).  5. Compressor according to one of claims 1 to 4, wherein the outer surface of the shaft (5) comprises against-forms (51) having all forms for the transmission of the forces of the rotor (3) on the shaft (5). ).
6. Procédé d'obtention d'un compresseur comportant une machine électrique (1) selon une des revendications 1 à 5, comportant les étapes de :  6. Process for obtaining a compressor comprising an electric machine (1) according to one of claims 1 to 5, comprising the steps of:
positionnement du rotor (3) par rapport à l'arbre (5),  positioning the rotor (3) relative to the shaft (5),
- maintien de l'arbre (5) et du rotor (3) par surmoulage du rotor (3) et de l'arbre (5). - Hold the shaft (5) and the rotor (3) by overmolding the rotor (3) and the shaft (5).
7. Procédé selon la revendication 6, dans lequel le surmoulage est réalisé par injection de matériau de maintien (6) entre la surface interne de l'ouverture (31) du rotor et la surface externe de l'arbre (5). 7. The method of claim 6, wherein the overmolding is performed by injection of holding material (6) between the inner surface of the opening (31) of the rotor and the outer surface of the shaft (5).
PCT/FR2015/053117 2014-11-19 2015-11-18 Electric machine WO2016079426A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15804172.3A EP3221950A2 (en) 2014-11-19 2015-11-18 Electric supercharger

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1461192 2014-11-19
FR1461192A FR3028688B1 (en) 2014-11-19 2014-11-19 ELECTRIC MACHINE COMPRISING A MATERIAL FOR HOLDING BETWEEN THE ROTOR AND THE ROTOR SHAFT

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WO2016079426A2 true WO2016079426A2 (en) 2016-05-26
WO2016079426A3 WO2016079426A3 (en) 2016-07-21

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Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
US3246187A (en) * 1962-04-03 1966-04-12 Sanyo Electric Co Ferrite core rotors
JP2574007B2 (en) * 1988-08-02 1997-01-22 ファナック株式会社 Synchronous motor rotor
JP2001050161A (en) * 1999-08-05 2001-02-23 Ebara Corp Gas transfer machine
US20070132335A1 (en) * 2005-12-08 2007-06-14 Ionel Dan M Rotor assembly having a reduced back portion and a method of manufacturing same
TWI314380B (en) * 2006-06-30 2009-09-01 Delta Electronics Inc Motor and rotor structure thereof

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Also Published As

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FR3028688A1 (en) 2016-05-20
EP3221950A2 (en) 2017-09-27
FR3028688B1 (en) 2017-12-22
WO2016079426A3 (en) 2016-07-21

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