WO2008052929A1 - Electric motor stator including means for limiting the vibration amplitude of the frame - Google Patents

Electric motor stator including means for limiting the vibration amplitude of the frame Download PDF

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Publication number
WO2008052929A1
WO2008052929A1 PCT/EP2007/061464 EP2007061464W WO2008052929A1 WO 2008052929 A1 WO2008052929 A1 WO 2008052929A1 EP 2007061464 W EP2007061464 W EP 2007061464W WO 2008052929 A1 WO2008052929 A1 WO 2008052929A1
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WO
WIPO (PCT)
Prior art keywords
carcass
cylindrical
ring
stator
face
Prior art date
Application number
PCT/EP2007/061464
Other languages
French (fr)
Inventor
Jean-Emmanuel Berge
Yannick Guibert
Gérald MICHEAU
Original Assignee
Valeo Systemes D'essuyage
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Publication date
Application filed by Valeo Systemes D'essuyage filed Critical Valeo Systemes D'essuyage
Publication of WO2008052929A1 publication Critical patent/WO2008052929A1/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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/17—Stator cores with permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/02—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting
    • H02K23/04—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting having permanent magnet excitation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations

Definitions

  • Stator of an electric motor comprising means limiting the amplitude of the vibrations of the carcass
  • the invention provides an electric motor stator which comprises an outer carcass comprising a cylindrical body of generally longitudinal main axis, k carcass mounting means on a support member arranged at a longitudinal end of the body, and a bottom arranged at the rear longitudinal end of the body, a magnetic member mounted within the carcass and having at least two magnetic elements mounted on an internal cylindrical faoe carcass body.
  • the rotor and / or the stator of the motor is excited by an electric horning excitation, to enclave the rotor of the motor in rotation about its axis.
  • k carcass When it vibrates, k carcass, and more particularly its cylindrical body, deforms eksectively in a radial direction relative to the main axis of the engine.
  • the vibration frequency of k carcass varies as a function of k rotation speed of the motor, so that this frequency can become equal to k resonant frequency of k carcass.
  • This resonant frequency is characterized by a significant increase in the amplitude of carcass deformations, which can adversely affect the proper functioning of the engine.
  • the object of the invention is to propose means limiting the amplitude of the k vibrations of the carcass of the stator when the k-carcass vibration frequency is close to k k-carcass resonance frequency.
  • the invention provides a stator of the type described above, characterized in that the cylindrical body carries a k carcass stiffening ring, which is coaxial with the cylindrical body of k carcass and which is made so as to to limit at least in part the amplitude of the carcass vibrations produced during operation of the electric motor.
  • the ring is arranged at the longitudinal front end of the cylindrical body;
  • the ring comprises a cylindrical faoe situated opposite the cylindrical body of the carcass, which comprises bosses protruding axially with respect to said cylindrical face, and which are able to bear firmly against the cylindrical body for limit the radial amplitude of the carcass vibrations;
  • At least one of said bosses is adapted to cooperate with the cylindrical body to angularly position the ring relative to the body, about the longitudinal main axis;
  • the ring is mounted inside the cylindrical body, and in that the bosses extend radially outwards from the outer cylindrical axis of the ring and bear against the internal cylindrical face -vis the cylindrical body;
  • the ring is arranged axially in front of the magnetic member and rests axially towards the rear against a front face facing the magnetic member;
  • the ring is mounted outside the cylindrical body, and in that the bosses extend radially inwards from the internal cylindrical axis of the ring and bear against the external cylindrical face -vis the cylindrical body.
  • Figure 1 is a schematic perspective view ecktée a stator according to the invention.
  • FIG 2 is a diagrammatic perspective view of the stator shown in Figure 1;
  • FIG. 3 is an end view of the stator shown in FIG. 2
  • stator 10 of an electric motor by example an electric motor driving a wiper mechanism of a vehicle automobile (not shown)
  • the stator 10 mainly comprises an outer casing 12 for mounting the motor on a carrier element of the vehicle, and a magnetic member 14, such as here an inductor having two poles 16a, 16b which is associated with a magnetic member of the rotor for the rotational completion of an output shaft (not shown) of the motor about a longitudinal main axis A.
  • the carcass 12 is made in a conventional manner by stamping, and it comprises a cylindrical main body 18 coaxial with the longitudinal main axis A, means 20 for mounting the motor on the support member, which are arranged in the level of a first longitudinal end before 18a of the main body 18, and a bottom 22 arranged at k second rear longitudinal end 18b of the main body 18.
  • the mounting means 20 here consist of two lugs 20 which extend in a radial pkn by mpport to the longitudinal main axis A, and whose radial axial end faces before 20a define a bearing surface against the support element.
  • Each lug 20 further includes a hole 24 which is adapted to be tmversé by a fixing screw (not shown)
  • the carcass 12 thus defines a hollow housing open to the front in which the poles 16a, 16b of the inductor 14 are mounted and which is adapted to receive the rotor (not shown) of the engine.
  • Each pole 16a, 16b of the inductor 14 is here in the form of a cylinder portion coaxial with the longitudinal main axis A, which is mounted on k internal cylindrical face 18i of the main body 18 and the two poles 16a , 16 are arranged symmetrically with respect to the longitudinal main axis A, as can be seen in particular in FIG. 2
  • k carcass 12 In vibrnnt, k carcass 12 is deformed radially, the radial deformation amplitude being k more important at the longitudinal end before 18a of the main body 18, and the radial deformations are even more important when k frequency of vibration k carcass 12 becomes equal to its resonance frequency.
  • a stiffening ring 26 is mounted on k carcass 12, and which is designed to limit the amplitude of the vibrations of k carcass 12
  • the vibrations of k carcass 12 are oriented principally in relation to the longitudinal main axis A.
  • the stiffening ring 26 is made to bear radially against k carcass 12
  • the ring 26 is mounted on the body 18 of k carcass 12, so as to bear radially against the cylindrical wall of the body 18.
  • the ring 26 is mounted on the body 18 at the level of the front longitudinal end 18a of the body 18, because it is at this front end 18a that the amplitude of the vibration of k carcass 12 is k higher.
  • the ring 26 has a cylindrical face external 26e which cooperates with k internal cylindrical face 18i of the body 18 to limit the amplitude of the vibrations.
  • the outer cylindrical face 26e of the ring further comprises a plurality of axial bosses 28 which protrude radially outwardly with respect to k outer cylindrical face 26e.
  • Each boss 28 is made in such a way that it bears radially against the inner cylindrical face 18i of the body 18, as can be seen in more detail in FIG. 3.
  • k outer cylindrical face 26e of the ring 26 which is located vis-à-vis k inner face 18i of the body 18, is located radially at a distance of k internal face 18i of the body 18.
  • Cek k carcass allows The ring comprises here six bosses 28, which are regularly distributed around the longitudinal main axis A. This is advantageous for the purpose of reducing the mechanical stress experienced by the carcass 12. It will be understood that the ring 26 may comprise a different number of bosses 28, the number of bosses 28 being defined in particular according to the number of deformation zones k carcass 12 According to an embodiment variant not shown at least one of the bosses 28 is shaped to allow angular positioning of the ring 26 about the longitudinal main axis A. Cek makes it possible to position each boss 28 at a particular zone of the body 18, and thus makes it possible to effectively limit the vibration amplitude of k carcass 12. According to this variant, the boss 28 producing the angular position of the ring
  • ring 26 is able to be received in a complementary housing of k carcass 12, which consists for example in a radial recess of a portion of the body 18.
  • the ring 26 is fitted axially into the body 18 of the carcass 12, until it comes axially in abutment against a front radial face 14a opposite the poles 16a, 16b.
  • the ring 26 abuts axially forwardly against an associated portion of the support member.
  • the stiffening ring 26 is mounted outside k carcass, so that k inner cylindrical face 26i of the ring 26 is located radially screwed with respect to k outer cylindrical face 18e of the body 18 and carries the bosses 28 according to the invention.
  • the bosses 28 are thus able to bear radially against k outer cylindrical face 18e of the body 18, similarly to the first embodiment described above, with reference to FIGS.
  • the stator 10 further comprises means for securing the ring 26 on k carcass 12

Abstract

The invention relates to an electric motor stator (10) including : an outer frame (12) with a cylindrical body (18); a magnetic member (14) mounted inside the frame (12) and comprising at least two magnetic members (16a, 16b) mounted on an inner cylindrical face (18i) of the body (18) of the frame (12); characterised in that the cylindrical body (18) bears a frame (12) stiffening ring (26) that is coaxial with the cylindrical body (18) of the frame (12) and designed so as to limit at least partially the amplitude of the vibrations of the frame (12) generated during the operation of the electric motor.

Description

Description Description
Stator de moteur électrique comportant des moyens limitant l'amplitude des vibrations de la carcasseStator of an electric motor comprising means limiting the amplitude of the vibrations of the carcass
[0001] L'invention propose un stator de moteur électrique qui comporte une carcasse externe comportant un corps cylindrique d'axe principal globalement longitudinal, des moyens de montage de k carcasse sur un élément de support agencés à une extrémité longitudinale avant du corps, et un fond agencé à l'extrémité longitudinale arrière du corps, un organe magnétique monté à l'intérieur de k carcasse et comportant au moins deux éléments magnétiques montés sur une faoe cylindrique interne du corps de k carcasse. [0002] Lors du fonctionnement du moteur électrique, le rotor et/ou le stator du moteur est excité par un cornant électrique d'excitation, pour entiaîner le rotor du moteur en rotation autour de son axe. [0003] Cette excitation du le rotor et/ou du stator, combinée à l'inteiaction entre le stator et le rotor, génère des sollicitations sur k carcasse externe du stator, qui entraînent k vibration de k carcasse. [0004] Lorsqu'elle vibre, k carcasse, et plus particulièrement son corps cylindrique, de déforme ékstiquement selon une direction radiale par rapport à l'axe principal du moteur. [0005] La fréquence de vibration de k carcasse varie en fonction de k vitesse de rotation du moteur, de manière que cette fréquence peut devenir égale à k fréquence de résonance de k carcasse. [0006] Cette fréquence de résonance est caractérisée par une augmentation importante de l'amplitude des déformations de k carcasse, ce qui peut nuire au bon fonctionnement du moteur. [0007] L'invention a pour but de proposer des moyens limitant l'amplitude des vibrations de k carcasse du stator lorsque k fréquence de vibration de k carcasse est proche de k fréquence de résonance de k carcasse. [0008] Dans ce but, l'invention propose un stator du type décrit précédemment, caractérisé en ce que le corps cylindrique porte un anneau de rigidification de k carcasse, qui est coaxial au corps cylindrique de k carcasse et qui est réalisé de manière à limiter au moins en partie l'amplitude des vibrations de k carcasse produites lors du fonctionnement du moteur électrique. [0009] Selon d'autres caractéristiques de l'invention, prises isolément ou en combinaison : - l'anneau est agencé au niveau de l'extrémité longitudinale avant du corps cylindrique ;The invention provides an electric motor stator which comprises an outer carcass comprising a cylindrical body of generally longitudinal main axis, k carcass mounting means on a support member arranged at a longitudinal end of the body, and a bottom arranged at the rear longitudinal end of the body, a magnetic member mounted within the carcass and having at least two magnetic elements mounted on an internal cylindrical faoe carcass body. During operation of the electric motor, the rotor and / or the stator of the motor is excited by an electric horning excitation, to enclave the rotor of the motor in rotation about its axis. This excitation of the rotor and / or the stator, combined with the interaction between the stator and the rotor, generates stresses on the external carcass of the stator, which cause k carcass vibration. When it vibrates, k carcass, and more particularly its cylindrical body, deforms eksectively in a radial direction relative to the main axis of the engine. The vibration frequency of k carcass varies as a function of k rotation speed of the motor, so that this frequency can become equal to k resonant frequency of k carcass. This resonant frequency is characterized by a significant increase in the amplitude of carcass deformations, which can adversely affect the proper functioning of the engine. The object of the invention is to propose means limiting the amplitude of the k vibrations of the carcass of the stator when the k-carcass vibration frequency is close to k k-carcass resonance frequency. For this purpose, the invention provides a stator of the type described above, characterized in that the cylindrical body carries a k carcass stiffening ring, which is coaxial with the cylindrical body of k carcass and which is made so as to to limit at least in part the amplitude of the carcass vibrations produced during operation of the electric motor. According to other features of the invention, taken separately or in combination: the ring is arranged at the longitudinal front end of the cylindrical body;
- l'anneau comporte une faoe cylindrique située en vis-à-vis du corps cylindrique de k carcasse, qui comporte des bossages faisant saillie îadialement par rapport à ladite face cylindrique, et qui sont aptes à s'appuyer îadialement contre le corps cylindrique pour limiter l'amplitude radiale des vibrations de k carcasse ;the ring comprises a cylindrical faoe situated opposite the cylindrical body of the carcass, which comprises bosses protruding axially with respect to said cylindrical face, and which are able to bear firmly against the cylindrical body for limit the radial amplitude of the carcass vibrations;
- au moins un desdits bossages est apte à coopérer avec le corps cylindrique pour positionner angukirement l'anneau par rapport au corps, autour de l'axe principal longitudinal ;- At least one of said bosses is adapted to cooperate with the cylindrical body to angularly position the ring relative to the body, about the longitudinal main axis;
- l'anneau est monté à l'intérieur du corps cylindrique, et en ce que les bossages s'étendent radialement vers l'extérieur depuis k faoe cylindrique externe de l'anneau et s'appuient contre k face cylindrique interne en vis-à-vis du corps cylindrique ;the ring is mounted inside the cylindrical body, and in that the bosses extend radially outwards from the outer cylindrical axis of the ring and bear against the internal cylindrical face -vis the cylindrical body;
- l'anneau est agencé axialement en avant de l'organe magnétique et s'appuie axialement vers l'arrière contre une faoe avant en vis-à-vis de l'organe magnétique ;the ring is arranged axially in front of the magnetic member and rests axially towards the rear against a front face facing the magnetic member;
- l'anneau est monté à l'extérieur du corps cylindrique, et en ce que les bossages s'étendent radialement vers l'intérieur depuis k faoe cylindrique interne de l'anneau et s'appuient contre k face cylindrique externe en vis-à-vis du corps cylindrique.the ring is mounted outside the cylindrical body, and in that the bosses extend radially inwards from the internal cylindrical axis of the ring and bear against the external cylindrical face -vis the cylindrical body.
[0010] D'autres caractéristiques et avantages de l'invention apparaîtront à k lecture de k description détaillée qui suit pour k compréhension de laquelle on se reportera aux figures annexées parmi lesquelles :Other features and advantages of the invention will become apparent upon reading the following detailed description for the understanding of which reference will be made to the appended figures among which:
- k figure 1 est une représentation schématique en perspective écktée d'un stator selon l'invention ;- k Figure 1 is a schematic perspective view ecktée a stator according to the invention;
- k figure 2 est une représentation schématique en perspective avec arrachement du stator représenté à k figure 1 ;Figure 2 is a diagrammatic perspective view of the stator shown in Figure 1;
- k figure 3 est une vue en bout du stator représenté à k figure 2FIG. 3 is an end view of the stator shown in FIG. 2
[0011] Dans k description qui va suivre, des éléments identiques, simikires ou analogues seront désignés par les mêmes chiffres de référence. [0012] On adoptera aussi l'orientation d'avant en arrière comme étant k direction longitudinale et de gauche à droite en se reportant à k figure 1. [0013] On a représenté aux figures un stator 10 d'un moteur électrique, par exemple un moteur électrique d'entraînement d'un mécanisme d'essuie-gkce d'un véhicule automobile (non représenté)In the following description, identical elements, simikires or the like will be designated by the same reference numerals. It will also adopt the orientation back and forth as being k longitudinal direction and left to right with reference to k Figure 1. [0013] There is shown in the figures a stator 10 of an electric motor, by example an electric motor driving a wiper mechanism of a vehicle automobile (not shown)
[0014] Le stator 10 comporte principalement une carcasse extérieure 12 de montage du moteur sur un élément de support du véhicule, et un organe magnétique 14, comme par exemple ici un inducteur comportant deux pôles 16a, 16b qui est associé à un organe magnétique du rotor pour l'entiaînement en rotation d'un arbre de sortie (non représenté) du moteur autour d'un axe principal A longitudinal.The stator 10 mainly comprises an outer casing 12 for mounting the motor on a carrier element of the vehicle, and a magnetic member 14, such as here an inductor having two poles 16a, 16b which is associated with a magnetic member of the rotor for the rotational completion of an output shaft (not shown) of the motor about a longitudinal main axis A.
[0015] La carcasse 12 est réalisée de manière conventionnelle par emboutissage, et elle comporte un corps principal 18 cylindrique coaxial à l'axe principal A longitudinal, des moyens 20 permettant le montage du moteur sur l'élément de support, qui sont agencés au niveau d'une première extrémité longitudinale avant 18a du corps principal 18, et un fond 22 agencé à k deuxième extrémité longitudinale arrière 18b du corps principal 18.The carcass 12 is made in a conventional manner by stamping, and it comprises a cylindrical main body 18 coaxial with the longitudinal main axis A, means 20 for mounting the motor on the support member, which are arranged in the level of a first longitudinal end before 18a of the main body 18, and a bottom 22 arranged at k second rear longitudinal end 18b of the main body 18.
[0016] Les moyens 20 de montage consistent ici en deux oreilles pknes 20 qui s'étendent dans un pkn radial par mpport à l'axe principal A longitudinal, et dont les faces radiales d'extrémité axiale avant 20a définissent une surface d'appui contre l'élément de support. Chaque oreille 20 comporte en outre un trou 24 qui est apte à être tmversé par une vis de fixation (non représentée)The mounting means 20 here consist of two lugs 20 which extend in a radial pkn by mpport to the longitudinal main axis A, and whose radial axial end faces before 20a define a bearing surface against the support element. Each lug 20 further includes a hole 24 which is adapted to be tmversé by a fixing screw (not shown)
[0017] La carcasse 12 définit ainsi un logement cylindrique creux ouvert vers l'avant dans lequel les pôles 16a, 16b de l'inducteur 14 sont montés et qui est apte à recevoir le rotor (non représenté) du moteur.The carcass 12 thus defines a hollow housing open to the front in which the poles 16a, 16b of the inductor 14 are mounted and which is adapted to receive the rotor (not shown) of the engine.
[0018] Chaque pôle 16a, 16b de l'inducteur 14 est ici en forme d'une portion de cylindre coaxial à l'axe principal A longitudinal, qui est montée sur k face cylindrique interne 18i du corps principal 18 et les deux pôles 16a, 16 sont agencés symétriquement par rapport à l'axe principal A longitudinal, comme on peut le voir notamment à k figure 2Each pole 16a, 16b of the inductor 14 is here in the form of a cylinder portion coaxial with the longitudinal main axis A, which is mounted on k internal cylindrical face 18i of the main body 18 and the two poles 16a , 16 are arranged symmetrically with respect to the longitudinal main axis A, as can be seen in particular in FIG. 2
[0019] Lors du fonctionnement du moteur, les interactions magnétiques entre le stator 10 et le rotor, sont susceptibles d'entraîner k carcasse 12 en vibmtion.During operation of the motor, the magnetic interactions between the stator 10 and the rotor, are likely to cause k carcass 12 vibmtion.
[0020] En vibrnnt, k carcasse 12 se déforme radialement, l'amplitude des déformations radiale étant k plus importante au niveau de l'extrémité longitudinale avant 18a du corps principal 18, et les déformations radiales sont encore plus importantes lorsque k fréquence de vibration de k carcasse 12 devient égale à sa fréquence de résonance.In vibrnnt, k carcass 12 is deformed radially, the radial deformation amplitude being k more important at the longitudinal end before 18a of the main body 18, and the radial deformations are even more important when k frequency of vibration k carcass 12 becomes equal to its resonance frequency.
[0021] Pour limiter l'amplitude de ces vibrations, et conformément à l'invention, un anneau 26 de rigidification est monté sur k carcasse 12, et qui est réalisé de manière à limiter l'amplitude des vibrations de k carcasse 12To limit the amplitude of these vibrations, and in accordance with the invention, a stiffening ring 26 is mounted on k carcass 12, and which is designed to limit the amplitude of the vibrations of k carcass 12
[0022] Comme on l'a dit plus haut, les vibrations de k carcasse 12 sont orientées principalement îadialement par rapport à l'axe principal A longitudinal. [0023] Pour limiter l'amplitude de ces vibrations, l'anneau de rigidification 26 est réalisé de manière à prendre appui radialement contre k carcasse 12 [0024] Pour cek, selon l'invention, l'anneau 26 est monté sur le corps 18 de k carcasse 12, de manière à prendre appui radialement contre k paroi cylindrique du corps 18. [0025] De plus, selon un autre aspect de l'invention, l'anneau 26 est monté sur le corps 18 au niveau de l'extrémité longitudinale avant 18a du corps 18, car c'est au niveau de cette extrémité avant 18a que l'amplitude des vibrations de k carcasse 12 est k plus élevée. [0026] On a représenté aux figures un premier mode de réalisation de l'anneau 26 selon l'invention, pour lequel l'anneau 26 est monté à l'intérieur du corps 18. [0027] L'anneau 26 comporte une face cylindrique externe 26e qui coopère avec k face cylindrique interne 18i du corps 18 pour limiter l'amplitude des vibrations. [0028] La face cylindrique externe 26e de l'anneau comporte en outre une pluralité de bossages axiaux 28 qui font saillie radialement vers l'extérieur par rapport à k face cylindrique externe 26e. Chaque bossage 28 est réalisé de manière qu'il s'appuie radialement contre k face cylindrique interne 18i du corps 18, comme on peut le voir plus en détails à k figure 3. [0029] Ainsi, comme on peut le voir à k figure 3, k face cylindrique externe 26e de l'anneau 26, qui est située en vis-à-vis de k face interne 18i du corps 18, est située radialement à distance de k face interne 18i du corps 18. Cek permet à k carcasse 12 de se déformer radialement de manière limitée, pour réduire les contraintes mécaniques subies par k carcasse 12 [0030] L'anneau comporte ici six bossages 28, qui sont répartis de manière régulière autour de l'axe principal A longitudinal. [0031] II sera compris que l'anneau 26 peut comporter un nombre différent de bossages 28, le nombre de bossages 28 étant défini notamment en fonction du nombre de zones de déformations de k carcasse 12 [0032] Selon une variante de réalisation non représentée, au moins l'un des bossages 28 est conformé de manière à permettre un positionnement angukire de l'anneau 26 autour de l'axe principal A longitudinal. [0033] Cek permet de positionner chaque bossage 28 au niveau d'une zone particulière du corps 18, et ainsi permet de limiter de manière efficace l'amplitude de vibration de k carcasse 12 [0034] Selon cette variante, le bossage 28 réalisant le positionnement angukire de l'anneauAs mentioned above, the vibrations of k carcass 12 are oriented principally in relation to the longitudinal main axis A. To limit the amplitude of these vibrations, the stiffening ring 26 is made to bear radially against k carcass 12 [0024] For cek, according to the invention, the ring 26 is mounted on the body 18 of k carcass 12, so as to bear radially against the cylindrical wall of the body 18. [0025] In addition, according to another aspect of the invention, the ring 26 is mounted on the body 18 at the level of the front longitudinal end 18a of the body 18, because it is at this front end 18a that the amplitude of the vibration of k carcass 12 is k higher. There is shown in the figures a first embodiment of the ring 26 according to the invention, for which the ring 26 is mounted inside the body 18. The ring 26 has a cylindrical face external 26e which cooperates with k internal cylindrical face 18i of the body 18 to limit the amplitude of the vibrations. The outer cylindrical face 26e of the ring further comprises a plurality of axial bosses 28 which protrude radially outwardly with respect to k outer cylindrical face 26e. Each boss 28 is made in such a way that it bears radially against the inner cylindrical face 18i of the body 18, as can be seen in more detail in FIG. 3. Thus, as can be seen in FIG. 3, k outer cylindrical face 26e of the ring 26, which is located vis-à-vis k inner face 18i of the body 18, is located radially at a distance of k internal face 18i of the body 18. Cek k carcass allows The ring comprises here six bosses 28, which are regularly distributed around the longitudinal main axis A. This is advantageous for the purpose of reducing the mechanical stress experienced by the carcass 12. It will be understood that the ring 26 may comprise a different number of bosses 28, the number of bosses 28 being defined in particular according to the number of deformation zones k carcass 12 According to an embodiment variant not shown at least one of the bosses 28 is shaped to allow angular positioning of the ring 26 about the longitudinal main axis A. Cek makes it possible to position each boss 28 at a particular zone of the body 18, and thus makes it possible to effectively limit the vibration amplitude of k carcass 12. According to this variant, the boss 28 producing the angular position of the ring
26 est apte à être reçu dans un logement complémentaire de k carcasse 12, qui consiste par exemple en un renfoncement radial d'une partie du corps 18. [0035] Pour son montage, l'anneau 26 est emmanché axialement dans le corps 18 de k carcasse 12, jusqu'à venir axialement en butée vers l'arrière contre une face radiale avant 14a en vis-à-vis des pôles 16a, 16b. [0036] De plus, lorsque le moteur est monté sur l'élément de support, l'anneau 26 vient en butée axialement vers l'avant contre une portion associée de l'élément de support. [0037] Ainsi, le maintien en position de l'anneau 26 dans k carcasse 12 est réalisé sans moyens de fixation supplémentaires, ce qui permet de limiter l'augmentation du prix du moteur. [0038] Selon un autre mode de réalisation de l'invention non représenté, l'anneau 26 de rigidification est monté à l'extérieur de k carcasse, de manière que k face cylindrique interne 26i de l'anneau 26 est située radialement en vis-à-vis de k face cylindrique externe 18e du corps 18 et porte les bossages 28 selon l'invention. [0039] Les bossages 28 sont ainsi aptes à s'appuyer radialement contre k face cylindrique externe 18e du corps 18, de manière simikire au premier mode de réalisation décrit précédemment, en référence aux figures. [0040] Par contre, selon ce mode de réalisation, le stator 10 comporte en outre des moyens de solidarisation de l'anneau 26 sur k carcasse 12 26 is able to be received in a complementary housing of k carcass 12, which consists for example in a radial recess of a portion of the body 18. [0035] For its mounting, the ring 26 is fitted axially into the body 18 of the carcass 12, until it comes axially in abutment against a front radial face 14a opposite the poles 16a, 16b. In addition, when the motor is mounted on the support member, the ring 26 abuts axially forwardly against an associated portion of the support member. Thus, maintaining the position of the ring 26 in k carcass 12 is achieved without additional fastening means, which limits the increase in the price of the engine. According to another embodiment of the invention not shown, the stiffening ring 26 is mounted outside k carcass, so that k inner cylindrical face 26i of the ring 26 is located radially screwed with respect to k outer cylindrical face 18e of the body 18 and carries the bosses 28 according to the invention. The bosses 28 are thus able to bear radially against k outer cylindrical face 18e of the body 18, similarly to the first embodiment described above, with reference to FIGS. By cons, according to this embodiment, the stator 10 further comprises means for securing the ring 26 on k carcass 12

Claims

Revendicationsclaims
[0001] Stator (10) de moteur électrique qui comporte :[0001] Stator (10) of an electric motor which comprises:
- une carcasse (12) externe comportant un corps (18) cylindrique d'axe principal (A) globalement longitudinal, des moyens (20, 24) de montage de la carcasse (12) sur un élément de support agencés à une extrémité longitudinale avant (18a) du corps (18), et un fond (22) agencé à l'extrémité longitudinale arrière (18b) du corps (18),- an outer carcass (12) comprising a cylindrical body (18) of main axis (A) generally longitudinal, means (20, 24) for mounting the carcass (12) on a support member arranged at a longitudinal end before (18a) of the body (18), and a bottom (22) arranged at the rear longitudinal end (18b) of the body (18),
- un organe magnétique (14) monté à l'intérieur de la carcasse (12) et comportant au moins deux déments magnétiques (16a, 16b) montés sur une face cylindrique interne (18i) du corps (18) de la carcasse (12), caractérisé en ce que le corps (18) cylindrique porte un anneau (26) de rigidification de la carcasse (12), qui est coaxial au corps (18) cylindrique de la carcasse (12) et qui est réalisé de manière à limiter au moins en partie l'amplitude des vibrations de la carcasse (12) produites lors du fonctionnement du moteur électrique.a magnetic member mounted inside the carcass and comprising at least two magnetic elements mounted on an inner cylindrical face of the body of the carcass , characterized in that the cylindrical body (18) carries a ring (26) for stiffening the carcass (12), which is coaxial with the cylindrical body (18) of the carcass (12) and which is designed to limit the less in part the amplitude of the vibrations of the carcass (12) produced during operation of the electric motor.
[0002] Stator (10) selon la revendication précédente, caractérisé en ce que l'anneau (26) est agencé au niveau de l'extrémité longitudinale avant (18a) du corps (18) cylindrique.Stator (10) according to the preceding claim, characterized in that the ring (26) is arranged at the front longitudinal end (18a) of the body (18) cylindrical.
[0003] Stator (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'anneau (26) comporte une face cylindrique (26e, 26i) située en vis-à-vis du corps (18) cylindrique de la carcasse (12), qui comporte des bossages (28) faisant saillie radialement par rapport à ladite face cylindrique (26e, 26i), et qui sont aptes à s'appuyer radialement contre le corps (18) cylindrique pour limiter l'amplitude radiale des vibrations de la carcasse (12).Stator (10) according to any one of the preceding claims, characterized in that the ring (26) has a cylindrical face (26e, 26i) situated opposite the cylindrical body (18) of the carcass (12), which comprises bosses (28) protruding radially from said cylindrical face (26e, 26i), and which are adapted to bear radially against the cylindrical body (18) to limit the radial amplitude of the carcass vibrations (12).
[0004] Stator (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que au moins un desdits bossages (28) est apte à coopérer avec le corps (18) cylindrique pour positionner angulairement l'anneau (26) par rapport au corps (18), autour de l'axe principal (A) longitudinal.Stator (10) according to any one of the preceding claims, characterized in that at least one of said bosses (28) is adapted to cooperate with the body (18) to angularly position the ring (26) relative to to the body (18) around the main (A) longitudinal axis.
[0005] Stator (10) selon la revendication 3 ou 4, caractérisé en ce que l'anneau (26) est monté à l'intérieur du corps (18) cylindrique, et en ce que les bossages (28) s'étendent radialement vers l'extérieur depuis la face cylindrique externe (26e) de l'anneau (26) et s'appuient contre la face cylindrique interne (18i) en vis-à-vis du corps (18) cylindrique.Stator (10) according to claim 3 or 4, characterized in that the ring (26) is mounted inside the body (18) cylindrical, and in that the bosses (28) extend radially outwardly from the outer cylindrical face (26e) of the ring (26) and bear against the inner cylindrical face (18i) vis-à-vis the cylindrical body (18).
[0006] Stator (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'anneau (26) est agencé axialement en avant de l'organe magnétique (14) et s'appuie axialement vers l'arrière contre une face avant (14a) en vis-à-vis de l'organe magnétique (14). Stator (10) selon la revendication 3 ou 4, caractérisé en ce que l'anneau (26) est monté à l'extérieur du corps (18) cylindrique, et en ce que les bossages (28) s'étendent radialement vers l'intérieur depuis la face cylindrique interne (26i) de l'anneau (26) et s'appuient contre la face cylindrique externe (18e) en vis-à-vis du corps (18) cylindrique. Stator (10) according to any one of the preceding claims, characterized in the ring (26) is arranged axially in front of the magnetic member (14) and bears axially backwards against a front face (14a) opposite the magnetic member (14). ). Stator (10) according to claim 3 or 4, characterized in that the ring (26) is mounted outside the cylindrical body (18), and in that the bosses (28) extend radially towards the interior from the inner cylindrical face (26i) of the ring (26) and bear against the outer cylindrical face (18e) vis-à-vis the body (18) cylindrical.
PCT/EP2007/061464 2006-10-31 2007-10-25 Electric motor stator including means for limiting the vibration amplitude of the frame WO2008052929A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0609534A FR2907982B1 (en) 2006-10-31 2006-10-31 ELECTRIC MOTOR STATOR COMPRISING MEANS FOR LIMITING THE AMPLITUDE OF THE VIBRATIONS OF THE CARCASS
FR0609534 2006-10-31

Publications (1)

Publication Number Publication Date
WO2008052929A1 true WO2008052929A1 (en) 2008-05-08

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PCT/EP2007/061464 WO2008052929A1 (en) 2006-10-31 2007-10-25 Electric motor stator including means for limiting the vibration amplitude of the frame

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WO (1) WO2008052929A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180269747A1 (en) * 2017-03-15 2018-09-20 Minebea Mitsumi Inc. Motor and actuator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9695637B2 (en) 2013-03-15 2017-07-04 Smith International, Inc. Downhole turbine motor and related assemblies

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0550706A1 (en) * 1991-05-28 1993-07-14 Fico Transpar, S.A. Impulsing pump for dispensing cleaning liquid for motor vehicles
JP2000253617A (en) * 1999-02-26 2000-09-14 Asmo Co Ltd Motor
EP1139544A1 (en) * 2000-03-27 2001-10-04 Calsonic Kansei Corporation Motor for driving blower fan with reduced noise emission
JP2002247800A (en) * 2001-02-15 2002-08-30 Asmo Co Ltd Motor and yoke

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0550706A1 (en) * 1991-05-28 1993-07-14 Fico Transpar, S.A. Impulsing pump for dispensing cleaning liquid for motor vehicles
JP2000253617A (en) * 1999-02-26 2000-09-14 Asmo Co Ltd Motor
EP1139544A1 (en) * 2000-03-27 2001-10-04 Calsonic Kansei Corporation Motor for driving blower fan with reduced noise emission
JP2002247800A (en) * 2001-02-15 2002-08-30 Asmo Co Ltd Motor and yoke

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180269747A1 (en) * 2017-03-15 2018-09-20 Minebea Mitsumi Inc. Motor and actuator
US11088591B2 (en) * 2017-03-15 2021-08-10 Minebea Mitsumi Inc. Motor and actuator

Also Published As

Publication number Publication date
FR2907982B1 (en) 2009-01-16
FR2907982A1 (en) 2008-05-02

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