WO2016075385A1 - Magnet-retaining device for a rotor - Google Patents

Magnet-retaining device for a rotor Download PDF

Info

Publication number
WO2016075385A1
WO2016075385A1 PCT/FR2015/052886 FR2015052886W WO2016075385A1 WO 2016075385 A1 WO2016075385 A1 WO 2016075385A1 FR 2015052886 W FR2015052886 W FR 2015052886W WO 2016075385 A1 WO2016075385 A1 WO 2016075385A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
housing
face
holding device
magnet
Prior art date
Application number
PCT/FR2015/052886
Other languages
French (fr)
Inventor
Khadija El Baraka
Svetislav JUGOVIC
Original Assignee
Valeo Equipements Electriques 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 Equipements Electriques Moteur filed Critical Valeo Equipements Electriques Moteur
Priority to EP15808696.7A priority Critical patent/EP3218992A1/en
Publication of WO2016075385A1 publication Critical patent/WO2016075385A1/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
    • H02K1/2773—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect consisting of tangentially magnetized radial magnets
    • 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

Definitions

  • Magnetic holding device for rotor Magnetic holding device
  • the invention relates to an electric machine rotor and the associated permanent magnet holding device.
  • the invention finds a particularly advantageous, but not exclusive, application with generators or current generators, such as those belonging to an extension of range of an electric vehicle, called "Range-Extender" in English, or with the compressors used for refrigerant compression of a motor vehicle air conditioner.
  • Electrical machines comprising a stator and a rotor with permanent magnets secured to a shaft.
  • the rotor may be integral with a driving and / or driven shaft and may belong to a rotating electrical machine in the form of an alternator or current generator as described in document EP 0 803 962 or of an electric motor as described. in EP 0 831 580.
  • the shaft can ensure the setting in motion of a scroll compressor, also known as "scroll compressor".
  • Such a system comprises two spirals interposed as pallets for pumping and compressing the refrigerant. In general, one of the turns is fixed, while the other moves eccentrically without turning, so as to pump and then imprison and finally compress fluid pockets between the turns.
  • the machine comprises a housing carrying the stator. This housing is configured to rotate the shaft for example by means of rolling, such as ball bearings and / or needle.
  • the rotor comprises a body made of laminated sheet metal, which comprises housings. Inside some of the housing is positioned at least one permanent magnet. There are tolerances used in the realization of the rotor which make it possible that the magnets are badly plated inside the housing of the rotor; this can be troublesome given the action of the centrifugal force to which the magnets can be subjected. Solutions have been developed to remedy this aspect.
  • a device for holding the magnet comprises anchoring clamps equipped with lateral extensions wedging between a magnet on the one hand and a flange on the other hand.
  • a second element, radially interposed between a face of the magnet and the hub of the rotor, is associated with the anchor clamp so that the radial retention of the magnet in the magnet is ensured.
  • the lateral extensions of the anchor clamp are wedged between the flange of the rotor and the hub of the rotor.
  • the holding device comprising the anchoring clamp and the second element is held axially in the housing by means of two end plates that are fixed to the axial ends of the rotor body.
  • the problem posed here is to simplify the implementation of the holding device in the rotor body.
  • it is a question of providing a holding device, easy to produce and inexpensive, for holding a magnet in its housing. It is also to facilitate the implementation of the mounting method of the holding device in a housing of a permanent magnet rotor, minimizing the steps making it difficult to implement a holding device in a housing.
  • Another objective here is to reduce the mounting constraints and reduce the time spent on the implementation of this single holding device.
  • the rotor further comprises holding devices each comprising: a central part extending axially inside a housing between an axial face of the housing and a face of a magnet, this central part having a shape such that it deforms a radial force on the magnet and on the axial face,
  • first and second retaining means carried by said central portion at each of its ends and projecting from the housing along the axis of the rotor, each of said first and second retaining means having shapes such that they exert by deformation , an axial force on respectively lower and upper sides of said body.
  • the holding device composed of a part (possibly resulting from an assembly), can be positioned in the housing and then held on the body via its first and second retaining means.
  • the holding device is mounted in the housing with the incorporation of the magnet into the body.
  • the elastic deformation capacity of the central part of the holding device advantageously allows the holding device to conform to the available radial space between the rotor body and a face of the magnet. More particularly, this resilient deformation capacity of the central portion makes it possible to ensure the radial retention of the magnet while the rotor rotates, which subjects the magnets to an action of the centrifugal force. No play between the magnet and the housing of the body is possible since it is the central part that catches it elastically.
  • the capacity of elastic deformation of the first and second retaining means makes it possible to mount the holding device on the body via its lower and upper faces, in a minimum of operation; it is to put the holding device in the housing and to ensure that the first and second retaining means each exert an axial force on the lower and upper faces of the body to fix the holding device.
  • the central portion extends axially between an inner axial face of the housing and the face, said inner axial face being oriented on the opposite side to the axis of the rotor.
  • the central portion extends axially between an inner axial face of the housing and the face of a magnet, said inner axial face being turned towards the radial wall of the rotor furthest from the axis of the rotor.
  • the central portion extends axially between an outer axial face of the housing and the face, said axial face O being oriented towards the axis of the rotor.
  • the central portion extends axially between an outer axial face of the housing and the face of a magnet, said outer axial face being the face oriented radially towards the axis of the rotor.
  • the central portion is formed of a succession of rounded portions and flat portions.
  • the central portion is formed by flat portions joined by a rounded portion.
  • the rounded portion has a convex face bearing against a face of the magnet and a concave face facing towards the axial face of the housing.
  • first and second retaining means have hook shapes with a bent portion.
  • the first and second retaining means develop to form a bent portion, and then form a second flat portion then extending perpendicularly to form a third flat portion that joins the end portion. from the central part.
  • the second flat portion is positioned axially outside the housing.
  • the curved portion having at least one contact with the face of the body, extends parallel to the face of the body thereon, in particular parallel along this face.
  • the invention also relates to a rotating electrical machine comprising a rotor as defined above.
  • the method of mounting a rotor comprising the following steps:
  • a holding device is positioned axially in a housing of a rotor body extending along an axis of the rotor, b) the holding device is abutted against an axial face of the housing,
  • the holding device is retained axially by first and second retaining means carried by the holding device and acting on the body,
  • At least one element in the form of a permanent magnet is inserted into the housing and held radially and axially by the holding device.
  • the first and second retaining means carried by the holding device act on the body axially.
  • a central portion between the first and second retaining means and carrying thereof, deforms a radial force on said permanent magnet.
  • an element in the form of a magnet is forced axially into the housing.
  • the first and second retaining means projecting from the housing, each exert by deformation, an axial force on respectively lower and upper sides of said body.
  • the holding device is abutted against an inner axial face (91 a) of the housing.
  • another holding device is mounted in the rotor according to steps a), b), c) and d); during step b) of mounting the other holding device, this other holding device is abutted against an outer axial face of the housing.
  • Figure 1 shows a perspective view of an embodiment of the holding device.
  • Figure 2 shows a perspective view of the embodiment of the holding device of Figure 1 prior to its incorporation into the housing of the rotor body.
  • Figure 3 shows a perspective view similar to Figure 2 in which is further shown an example of a magnet prior to its incorporation into the housing.
  • FIG. 4 shows a sectional view along a radial plane of the rotor body, in which the exemplary embodiment of the holding device shown in FIGS. 1, 2 and 3 is placed in position in the housing and the magnet shown in FIG. Figure 3 is not yet incorporated in the housing.
  • Figure 5 shows a sectional view similar to Figure 4, wherein the magnet is further positioned in the housing, the magnet and the holding device thus being held in position.
  • FIGS 2,3 show a rotor 1 according to the invention, X axis, having a body 3 fixed to a central hub (not shown) splined at its inner periphery for fixing in rotation on a shaft.
  • the body 3 comprises housings 9 intended to receive permanent magnets 14 held radially and axially by means of holding devices 17. More specifically, the rotor 1 is formed by a stack of sheets extending in a radial plane perpendicular to the X-axis. The bundle of sheets forms the body 3 of the rotor 1 and is made of ferromagnetic material.
  • the sheets of the body 3 are preferably maintained by means of rivets passing axially through the rotor 1 from one side to the other.
  • Recesses may be formed in the body 3. These recesses have, in top view, a shape resulting from the combination of a triangle shape and a trapezoidal shape. The triangle has one side in common with the long side of the trapeze. The recesses can channel the magnetic flux. In another embodiment shown in the figures herein, the body 3 is devoid of recesses.
  • the body 3 also comprises housings 9 - preferably of substantially parallelepiped shape - intended to receive permanent magnets 14. These housings 9 regularly spaced on the circumference of the rotor and located in the body 3 of the rotor 1, have a longitudinal direction of extension parallel to the axis X and an extension direction extending substantially radially relative to the axis X. One of the radial faces (or side face) of the magnet forms a North pole and the other radial face of the magnet a south pole as in EP 0 803 962.
  • the housings 9, formed in the body 3, are here open and preferably of generally rectangular section.
  • the housing 9, in a section perpendicular to the axis X, comprises at least a through passage 10 adapted to allow the passage of the holding device 17; the section of this passage 10 is comparatively larger than the largest section of the holding device 17 perpendicular to the X axis, it being understood that during assembly, the holding device 17 would constitute a male part and the passage would constitute the female part.
  • FIG. 1 to 5 there is shown a holding device 17, a central portion 19 exerts by deformation a radial force on the magnet 14 and on an inner axial face 91 of the housing.
  • a holding device whose central portion 19 exerts by deformation a radial force on the magnet 14 and on an outer axial face 91 b of the housing.
  • outer axial face 91 b and inner axial face 91 a the faces respectively oriented radially towards the axis X of the rotor 1 and opposite side to the axis X of the rotor 1.
  • the inner axial face 91 is facing outwardly of the rotor 1; the outside of the rotor 1 is the radial wall of the rotor 1 furthest from the axis X.
  • the housings 9 are intended to receive each of the elements in the form of a magnet 14 or a plurality of permanent magnets 14 superimposed on each other along one of their longitudinal face to obtain maximum power of the machine.
  • the magnets 14 thus superimposed then form a column of magnetic elements having a shape complementary to that of the housings 9.
  • the magnets 14 can therefore be stacked on each other in an axial direction to form a column of elements of complementary shape to that of housing 9.
  • the magnets 14 may be in rare earth for example based on
  • Samarium-Cobalt (SmCo) or based on Neodymium-Fer-Boron (NdFeB) having a high coercivity and a high rate of persistence as well as good temperature stability. They can also be made of ferrite.
  • the use of rare-earth magnets is possible thanks to the holding device 17 described hereinafter which cleans the magnets 14 and the fact that several magnets are preferably mounted in the same housing 9. Of course, the number of magnets depends on the applications and in particular on the length of the body 3.
  • the number may be equal to or less than the number of rare earth magnets.
  • expensive rare earth magnets can be used to get as close as possible to a desired electrical power of the machine and complete this with less expensive ferrite magnets.
  • the invention makes it possible to use permanent magnets of different shade.
  • At least one of the magnets may be replaced by a non-magnetic element, for example made of aluminum, of the same shape to obtain the desired power of the electric machine. It is thus formed, in the axial direction, a column of elements stacked on each other and of complementary shape to that of the housing.
  • all the housings 9 may therefore contain a plurality of magnets 14 stacked in the axial direction with possibly presence of at least one non-magnetic element.
  • at least two diametrically opposed housings are empty. Due to the fact that the column of elements comprises at least a plurality of stacked magnets, the power of the rotating electrical machine can be easily adjusted while keeping the same rotor.
  • the rotor 1 comprises holding devices 17 formed from an elongated metal strip whose width depends on that of the housing 9 in which this band penetrates.
  • this holding device 17 shown in particular in FIG. 1 comprises a central part 19 extending axially inside the housing 9 between an axial face 91 a, 91 b of the housing 9 and a face 15 of a magnet 14.
  • this central portion 19 having a shape such that it deforms a radial force on the magnet 14 and on the axial face 91, 91 a, 91 b concerned.
  • the central portion 19 is therefore positioned axially between first 92 and second end 93 internal of the internal axial face 91a of the housing 9, or, the central portion 19 is positioned axially between the third 94 and fourth 95 external ends the outer axial face of the housing.
  • This central portion 19 has a shape such that it exerts by deformation, when compressed between the magnets 14 and the axial face, a radial force on each magnet 14 of the housing 9 from the inside to the outside of the rotor 1 or from the inside to the outside of the rotor 1.
  • the holding device 17 Due to the elasticity of the holding device 17, it can be likened to a spring, more particularly a leaf spring comprising a first detent position and a second compression position. In this case, when the holding device 17 and the magnet are mounted in the rotor 2, the spring is in its second compression position.
  • the central portion 19 is formed by first flat portions 192 joined by a first rounded portion 191.
  • the first rounded portion 191 here provides the connection between the first flat portions 192.
  • the central portion 19 is formed of a succession of rounded portions 191 and flat portions 192.
  • the first flat portions 192 are intended to be pressed against the axial face 91, 91 a, 91 b of the housing 9.
  • the rounded portions 191 comprise a convex face 193 bearing against a face 15 of the magnet 14 of the housing 9 and a concave face 194 facing towards the face axial 91 of the housing 9.
  • the holding devices 17 also comprise first and second retaining means 30,40. These first 30 and second 40 retaining means are carried by said central portion 19 at each of its ends 20.
  • the ends 20 of the central portion 19 are preferably at the location of the first flat portions 192; as shown in FIGS. 4 and 5, the ends 20 of the central portion 19 are included saxially inside the housing 9 once the holding device 17 mounted (see Figure 5).
  • the holding device extends to form the first and second retaining means.
  • the ends 20 of the central portion 19 are located axially opposite internal ends 92, 93 and / or 94,95. These ends 20 are defined axially at the separation between the inside and the outside of the housing 9.
  • the first 30 and second 40 retaining means have hook shapes with a curved portion 31. From the end end 32, the first 30 and second retaining means 40 develop to form the bent portion 31 and then develop to form a second flat portion 33 then extending perpendicularly to form a third flat portion 34 which joins the end 20 of the central portion 19. The third flat portion 34 and the first flat portion 192 of the first thus meet at the end 20, at the point of separation between the inside and the outside of the housing 9. .
  • first and second retaining means 30,40 thus carried by said central portion 19 have shapes such that said retaining means 30,40 exert by deformation, an axial force on respectively lower 4 and upper 5 faces of the body 3 .
  • the second flat portion 33 is positioned radially between the face 15 of the magnet (with which the holding device 17 is in contact) and a lower face 4 or upper 5 of the body with which the curved portion 31 has a contact. It is positioned axially outside the housing 9.
  • the third portion 34 is positioned radially between the longitudinal face 15 of the magnet 14 (with which the holding device 17 is in contact) and the axial face 91a, 91b (internal 91a or external 91b of the housing 9). . It is positioned axially outside the housing 9
  • the holding device 17 is positioned inside the housings 9. More specifically, the holding device is positioned axially in a housing 9 of the rotor body 1 (3) extending along the axis X. The holding device 17 is then positioned so that the holding device 17 is abutted against the axial fax 91a, 91b (internal or external) of the housing 9.
  • the holding device 17 is then retained axially by the first 30 and second 40 retaining means carried by the holding device 17 and acting on the body 3.
  • At least one element in the form of a permanent magnet is inserted into the housing 9 and held radially and axially by the holding device 17.
  • the magnets are axially threaded in force. inside the housing 9.
  • the central portion 19 of the holding device 17 then applies, due to the deformation of the central portion 19 (in particular of its rounded portion 191), a radial holding force on the magnet 15 contained in the housing 9.
  • This spring effect allows the insertion and then the maintenance of the holding device 17.An end plate can then be pressed against the lower face 4 and / or upper 5 of the body 3 for balancing purposes, as described. above.
  • the holding device 17 is an elastic piece in the form of a strip of material, which has a central portion 19 and first and second elastically deformable retaining means 40 for exerting respectively a force radial and axial on the permanent magnets.
  • the central part 19 with radial action makes it possible to protect the magnets 14 because they are less sensitive to shocks and vibrations because of this central portion 19.
  • the first 30 and second 40 axially acting retaining means also make it possible to protect the magnets 14 and make them even less sensitive to shocks and vibrations.
  • the magnets 14 have good resistance to centrifugal force thanks to the holding device 17.
  • the manufacturing tolerances of the housings 9 and the magnets 14 can be large because the central portion 19 and the first 30 and second 40 means of restraint catches the games due to manufacturing tolerances.
  • the presence of the magnets holding device 17 makes it possible to improve the radial resistance of the magnets without moving them, despite the manufacturing tolerances.
  • those skilled in the art can make modifications to the various shapes of the body 3 of the rotor 1 and the holding devices 17 described in the figures without departing from the scope of the invention.
  • This holding device 17 in the form of a strip of material is in a spring steel embodiment.
  • the device 17 is made of plastic material advantageously or in any other material, for example metallic. These devices 17 may be provided with a coating for contact with the magnets.
  • the holding device 17 is abutted against an inner axial face 91a of the housing 9,
  • the rotor comprises two holding devices 17 extending on the two axial faces 91a, 91b opposite. Once the two devices 17 are mounted and the magnet 14 inserted, the opposite longitudinal faces 15 of the magnet 14 each have a contact with the central portion 19 of the device 17 which corresponds to it.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

The invention relates to a rotor with permanent magnets, comprising a laminated core with slots (9), which can receive a permanent magnet (14), and at least one retaining device (17) comprising: a central part (19) extending axially inside a slot (9) between an axial face (91, 91a, 91b) of the slot (9) and a face (15) of the magnet (14), said central part (19) exerting a radial load, by means of deformation, on the magnet (14) and on the axial face (91, 91a, 91b); and first (30) and second (40) retaining means borne by the central part (19) at each of the ends (20) thereof and projecting from the slot (9), each of the first and second retaining means having shapes such that they exert an axial load, by means of deformation, on the lower (4) and upper (5) faces of the body (3) respectively.

Description

« Dispositif de maintien d'aimants pour rotor»  "Magnet holding device for rotor"
DESCRIPTION Domaine de l'invention Field of the invention
L'invention concerne un rotor pour machine électrique ainsi que le dispositif de maintien d'aimants permanents associé. L'invention trouve une application particulièrement avantageuse, mais non exclusive, avec les alternateurs ou générateurs de courant, tels que ceux appartenant à un prolongateur d'autonomie d'un véhicule électrique, appelé « Range -Extender » en anglais, ou avec des les compresseurs utilisés pour la compression de fluide réfrigérant de climatiseur de véhicule automobile. The invention relates to an electric machine rotor and the associated permanent magnet holding device. The invention finds a particularly advantageous, but not exclusive, application with generators or current generators, such as those belonging to an extension of range of an electric vehicle, called "Range-Extender" in English, or with the compressors used for refrigerant compression of a motor vehicle air conditioner.
Etat de la technique State of the art
On connaît des machines électriques comportant un stator et un rotor à aimants permanents solidaire d'un arbre. Le rotor pourra être solidaire d'un arbre menant et/ou menée et pourra appartenir à une machine électrique tournante sous la forme d'un alternateur ou générateur de courant comme décrit dans le document EP 0 803 962 ou d'un moteur électrique comme décrit dans le document EP 0 831 580. L'arbre pourra assurer la mise en mouvement d'un compresseur à spirale, également connu sous le nom de « compresseur scroll ». Un tel système comporte deux spirales intercalées comme des palettes pour pomper et comprimer le fluide réfrigérant. En général, une des spires est fixe, alors que l'autre se déplace excentriquement sans tourner, de sorte à pomper puis emprisonner et enfin comprimer des poches de fluide entre les spires. Un tel système est par exemple décrit dans le document EP 1 865 200. Dans tous les cas, la machine comporte un boîtier portant le stator. Ce boîtier est configuré pour porter à rotation l'arbre par exemple par l'intermédiaire de roulement, tel que des roulements à billes et/ou à aiguilles. Electrical machines are known comprising a stator and a rotor with permanent magnets secured to a shaft. The rotor may be integral with a driving and / or driven shaft and may belong to a rotating electrical machine in the form of an alternator or current generator as described in document EP 0 803 962 or of an electric motor as described. in EP 0 831 580. The shaft can ensure the setting in motion of a scroll compressor, also known as "scroll compressor". Such a system comprises two spirals interposed as pallets for pumping and compressing the refrigerant. In general, one of the turns is fixed, while the other moves eccentrically without turning, so as to pump and then imprison and finally compress fluid pockets between the turns. Such a system is for example described in document EP 1 865 200. In In all cases, the machine comprises a housing carrying the stator. This housing is configured to rotate the shaft for example by means of rolling, such as ball bearings and / or needle.
Le rotor comprend un corps réalisé en tôle feuilletée, qui comporte des logements. A l'intérieur de certains des logements, est positionné au moins un aimant permanent. Il existe des tolérances utilisées dans la réalisation du rotor qui font qu'il est possible que les aimants soient mal plaqués à l'intérieur des logements du rotor ; ce peut être gênant compte tenu de l'action de la force centrifuge à laquelle peuvent être soumis les aimants. Des solutions ont été développées pour remédier à cet aspect.  The rotor comprises a body made of laminated sheet metal, which comprises housings. Inside some of the housing is positioned at least one permanent magnet. There are tolerances used in the realization of the rotor which make it possible that the magnets are badly plated inside the housing of the rotor; this can be troublesome given the action of the centrifugal force to which the magnets can be subjected. Solutions have been developed to remedy this aspect.
Dans US201 1/0227441 , est décrit un rotor à aimants permanents comportant :  In US201 1/0227441, there is described a permanent magnet rotor comprising:
- un paquet de tôles formant le corps du rotor ayant un axe, et, a bundle of plates forming the rotor body having an axis, and
- des logements espacés régulièrement sur la circonférence du rotor et situés dans le corps du rotor, dont certains reçoivent au moins un élément sous la forme d'un aimant permanent. - Housing spaced evenly around the circumference of the rotor and located in the rotor body, some of which receive at least one element in the form of a permanent magnet.
Un dispositif de maintien de l'aimant est décrit. Ce dispositif de maintien comprend des pinces d'ancrages équipés d'extensions latérales se coinçant entre un aimant d'une part et un flasque d'autre part. Un deuxième élément, interposé radialement entre une face de l'aimant et le moyeu du rotor, est associé à la pince d'ancrage afin que le maintien radial de l'aimant dans l'aimant soit assuré. Lors du montage, les extensions latérales de la pince d'ancrage sont coincées entre le flasque du rotor et le moyeu du rotor. Enfin, le dispositif de maintien comprenant la pince d'ancrage et le deuxième élément est maintenu axialement dans le logement au moyen de deux plaques d'extrémités venant se fixer aux extrémités axiales du corps du rotor.  A device for holding the magnet is described. This holding device comprises anchoring clamps equipped with lateral extensions wedging between a magnet on the one hand and a flange on the other hand. A second element, radially interposed between a face of the magnet and the hub of the rotor, is associated with the anchor clamp so that the radial retention of the magnet in the magnet is ensured. During assembly, the lateral extensions of the anchor clamp are wedged between the flange of the rotor and the hub of the rotor. Finally, the holding device comprising the anchoring clamp and the second element is held axially in the housing by means of two end plates that are fixed to the axial ends of the rotor body.
Il a été constaté que l'utilisation d'un tel dispositif de maintien pour maintenir l'aimant permanent dans le logement et la mise en œuvre d'un tel procédé de montage d'un dispositif de maintien de l'aimant dans son logement affectaient négativement les coûts de fabrication. En particulier, la mise en œuvre du procédé de montage nécessite de :It has been found that the use of such a holding device to hold the permanent magnet in the housing and the implementation of such a method of mounting a device for holding the magnet in its housing affected negatively manufacturing costs. In particular, the implementation of the mounting method requires:
- prévoir plusieurs pièces distinctes pour assurer le maintien radial de l'aimant, - provide several separate parts to ensure the radial retention of the magnet,
- prévoir des tolérances géométriques réduites des pièces telles que le moyeu du rotor et le flasque du rotor afin d'assurer le bon coincement des extensions latérales de la pince d'ancrage, ce qui augmente les coûts de fabrication ; de mauvais ajustements pourrait ne pas permettre le bon plaquage radial de l'aimant, voire l'impossibilité de monter le dispositif de maintien au sein du rotor, - prévoir de nouvelles pièces pour empêcher le dispositif de maintien de s'échapper axialement de son logement, comme par exemple des plaques d'extrémités.  - Provide reduced geometric tolerances of parts such as the rotor hub and the flange of the rotor to ensure the proper jamming of the lateral extensions of the anchor, which increases manufacturing costs; incorrect adjustments may not allow good radial plating of the magnet, or even the impossibility of mounting the holding device within the rotor, - provide new parts to prevent the holding device from escaping axially from its housing , such as end plates.
Assembler ces différents éléments nécessite de nombreuses étapes qui allongent considérablement le temps de montage, ce qui affecte concomitamment les coûts de fabrication.  Assembling these different elements requires many steps which considerably lengthen the assembly time, which concomitantly affects the manufacturing costs.
Objet de l'invention Object of the invention
Dans ce contexte, le problème ici posé est de simplifier l'implantation du dispositif de maintien dans le corps du rotor. En particulier, il s'agit de proposer un dispositif de maintien, facile à réaliser et peu coûteux, pour maintenir un aimant dans son logement. Il s'agit aussi de faciliter la mise en œuvre du procédé de montage du dispositif de maintien dans un logement d'un rotor à aimants permanents, en minimisant les étapes rendant compliquées l'implantation d'un dispositif de maintien dans un logement. Un autre objectif ici visé est donc de réduire les contraintes de montage et de diminuer le temps consacré à l'implantation de ce seul dispositif de maintien. In this context, the problem posed here is to simplify the implementation of the holding device in the rotor body. In particular, it is a question of providing a holding device, easy to produce and inexpensive, for holding a magnet in its housing. It is also to facilitate the implementation of the mounting method of the holding device in a housing of a permanent magnet rotor, minimizing the steps making it difficult to implement a holding device in a housing. Another objective here is to reduce the mounting constraints and reduce the time spent on the implementation of this single holding device.
La solution proposée par la présente invention est que le rotor comporte en outre des dispositifs de maintien comportant chacun : - une partie centrale s'étendant axialement à l'intérieur d'un logement entre une face axiale du logement et une face d'un aimant, cette partie centrale ayant une forme telle qu'elle exerce par déformation un effort radial sur l'aimant et sur la face axiale, The solution proposed by the present invention is that the rotor further comprises holding devices each comprising: a central part extending axially inside a housing between an axial face of the housing and a face of a magnet, this central part having a shape such that it deforms a radial force on the magnet and on the axial face,
- des premier et second moyens de retenue portés par ladite partie centrale à chacune de ses extrémités et faisant saillie par rapport au logement suivant l'axe du rotor, chacun desdits premier et second moyens de retenue ayant des formes telles qu'ils exercent par déformation, un effort axial sur des faces respectivement inférieure et supérieure dudit corps.  first and second retaining means carried by said central portion at each of its ends and projecting from the housing along the axis of the rotor, each of said first and second retaining means having shapes such that they exert by deformation , an axial force on respectively lower and upper sides of said body.
Avantageusement, le dispositif de maintien, composé d'une pièce (éventuellement issue d'un assemblage), peut être positionné dans le logement puis maintenu sur le corps via ses premier et second moyens de retenue. A priori, le dispositif de maintien est monté dans le logement avec l'incorporation de l'aimant dans le corps.  Advantageously, the holding device, composed of a part (possibly resulting from an assembly), can be positioned in the housing and then held on the body via its first and second retaining means. A priori, the holding device is mounted in the housing with the incorporation of the magnet into the body.
La capacité de déformation élastique de la partie centrale du dispositif de maintien permet favorablement au dispositif de maintien de se conformer à l'encombrement radial disponible entre le corps du rotor et une face de l'aimant. Plus particulièrement, cette capacité de déformation élastique de la partie centrale permet d'assurer le maintien radial de l'aimant alors que le rotor tourne, ce qui soumet les aimants à une action de la force centrifuge. Aucun jeu entre l'aimant et le logement du corps n'est possible puisque c'est la partie centrale qui le rattrape élastiquement.  The elastic deformation capacity of the central part of the holding device advantageously allows the holding device to conform to the available radial space between the rotor body and a face of the magnet. More particularly, this resilient deformation capacity of the central portion makes it possible to ensure the radial retention of the magnet while the rotor rotates, which subjects the magnets to an action of the centrifugal force. No play between the magnet and the housing of the body is possible since it is the central part that catches it elastically.
La capacité de déformation élastique des premier et second moyens de retenue, permet de monter le dispositif de maintien sur le corps via ses faces inférieure et supérieure, en un minimum d'opération ; il s'agit de mettre le dispositif de maintien dans le logement puis de faire en sorte que les premier et second moyens de retenue exercent chacun un effort axial sur les faces inférieure et supérieure du corps pour fixer le dispositif de maintien. Dans un autre mode de réalisation de l'invention, la partie centrale s'étend axialement entre une face axiale interne du logement et la face, ladite face axiale interne étant orientée du côté opposé à l'axe du rotor. The capacity of elastic deformation of the first and second retaining means makes it possible to mount the holding device on the body via its lower and upper faces, in a minimum of operation; it is to put the holding device in the housing and to ensure that the first and second retaining means each exert an axial force on the lower and upper faces of the body to fix the holding device. In another embodiment of the invention, the central portion extends axially between an inner axial face of the housing and the face, said inner axial face being oriented on the opposite side to the axis of the rotor.
Avantageusement, la partie centrale s'étend axialement entre une 5 face axiale interne du logement et la face d'un aimant, ladite face axiale interne étant tournée vers la paroi radiale du rotor la plus éloignée de l'axe du rotor.  Advantageously, the central portion extends axially between an inner axial face of the housing and the face of a magnet, said inner axial face being turned towards the radial wall of the rotor furthest from the axis of the rotor.
Dans un mode de réalisation, la partie centrale s'étend axialement entre une face axiale externe du logement et la face , ladite face axiale o externe étant orientée vers l'axe du rotor.  In one embodiment, the central portion extends axially between an outer axial face of the housing and the face, said axial face O being oriented towards the axis of the rotor.
Avantageusement, la partie centrale s'étend axialement entre une face axiale externe du logement et la face d'un aimant, ladite face axiale externe étant la face orientée radialement vers l'axe du rotor.  Advantageously, the central portion extends axially between an outer axial face of the housing and the face of a magnet, said outer axial face being the face oriented radially towards the axis of the rotor.
Dans un autre mode de réalisation, la partie centrale est formée d'une5 succession de portions arrondies et de portions plates.  In another embodiment, the central portion is formed of a succession of rounded portions and flat portions.
Dans une variante, la partie centrale est formée par des portions plates se rejoignant par une portion arrondie.  In a variant, the central portion is formed by flat portions joined by a rounded portion.
Dans un autre mode de réalisation, la portion arrondie comporte une face convexe en appui contre une face de l'aimant et une face concave o tournée vers la face axiale du logement.  In another embodiment, the rounded portion has a convex face bearing against a face of the magnet and a concave face facing towards the axial face of the housing.
Dans un autre mode de réalisation, les premier et second moyens de retenue présentent des formes de crochet avec une partie recourbée.  In another embodiment, the first and second retaining means have hook shapes with a bent portion.
Dans un autre mode de réalisation, depuis une extrémité terminale, les premier et second moyens de retenue se développent pour former une 5 partie recourbée, puis former une deuxième portion plate s'étendant ensuite perpendiculairement pour former une troisième portion plate qui rejoint l'extrémité de la partie centrale.  In another embodiment, from one end end, the first and second retaining means develop to form a bent portion, and then form a second flat portion then extending perpendicularly to form a third flat portion that joins the end portion. from the central part.
Dans une autre variante, la deuxième portion plate est positionnée axialement en dehors du logement. Dans une autre variante, la partie recourbée, présentant au moins un contact avec la face du corps, s'étend parallèlement à la face du corps sur celle-ci, notamment parallèlement le long de cette face. In another variant, the second flat portion is positioned axially outside the housing. In another variant, the curved portion, having at least one contact with the face of the body, extends parallel to the face of the body thereon, in particular parallel along this face.
L'invention a également pour objet une machine électrique tournante comprenant une rotor tel que défini précédemment.  The invention also relates to a rotating electrical machine comprising a rotor as defined above.
Suivant un autre objet visé par l'invention, le procédé de montage d'un rotor comportant les étapes suivantes :  According to another object of the invention, the method of mounting a rotor comprising the following steps:
a) un dispositif de maintien est positionné axialement dans un logement d'un corps de rotor s'étendant suivant un axe du rotor, b) le dispositif de maintien est mis en butée contre une face axiale du logement,  a) a holding device is positioned axially in a housing of a rotor body extending along an axis of the rotor, b) the holding device is abutted against an axial face of the housing,
c) le dispositif de maintien est retenu axialement par des premier et second moyens de retenue portés par le dispositif de maintien et agissant sur le corps,  c) the holding device is retained axially by first and second retaining means carried by the holding device and acting on the body,
d) ensuite, au moins un élément sous la forme d'un aimant permanent est inséré dans le logement et maintenu radialement et axialement par le dispositif de maintien.  d) then, at least one element in the form of a permanent magnet is inserted into the housing and held radially and axially by the holding device.
De préférence, à l'étape c), les premier et second moyens de retenue portés par le dispositif de maintien, agissent sur le corps axialement.  Preferably, in step c), the first and second retaining means carried by the holding device act on the body axially.
Suivant un autre mode de réalisation, une partie centrale, comprise entre les premier et second moyens de retenue et portant ceux-ci, exerce par déformation un effort radial sur ledit aimant permanent.  According to another embodiment, a central portion, between the first and second retaining means and carrying thereof, deforms a radial force on said permanent magnet.
Suivant un autre mode de réalisation, durant l'étape d), un élément sous la forme d'un aimant est enfilé axialement à force à l'intérieur du logement.  According to another embodiment, during step d), an element in the form of a magnet is forced axially into the housing.
Dans un autre mode de réalisation de l'invention, les premier et second moyens de retenue, en saillie par rapport au logement, exercent chacun par déformation, un effort axial sur des faces respectivement inférieure et supérieure dudit corps. Dans un autre mode de réalisation de l'invention, durant l'étape b), le dispositif de maintien est mis en butée contre une face axiale interne (91 a) du logement. In another embodiment of the invention, the first and second retaining means, projecting from the housing, each exert by deformation, an axial force on respectively lower and upper sides of said body. In another embodiment of the invention, during step b), the holding device is abutted against an inner axial face (91 a) of the housing.
Dans un autre mode de réalisation de l'invention, un autre dispositif de maintien est monté dans le rotor suivant les étapes a),b),c) et d) ; durant l'étape b) de montage de l'autre dispositif de maintien, cet autre dispositif de maintien est mis en butée contre une face axiale externe du logement.  In another embodiment of the invention, another holding device is mounted in the rotor according to steps a), b), c) and d); during step b) of mounting the other holding device, this other holding device is abutted against an outer axial face of the housing.
Brève description des figures Brief description of the figures
La figure 1 montre une vue en perspective d'un exemple de réalisation du dispositif de maintien. Figure 1 shows a perspective view of an embodiment of the holding device.
La figure 2 montre une vue en perspective de l'exemple de réalisation du dispositif de maintien de la figure 1 préalablement à son incorporation dans le logement du corps du rotor.  Figure 2 shows a perspective view of the embodiment of the holding device of Figure 1 prior to its incorporation into the housing of the rotor body.
La figure 3 montre une vue en perspective semblable à la figure 2 dans laquelle est en outre représentée un exemple d'aimant préalablement à son incorporation dans le logement.  Figure 3 shows a perspective view similar to Figure 2 in which is further shown an example of a magnet prior to its incorporation into the housing.
La figure 4 montre une vue de coupe selon un plan radial du corps de rotor, dans laquelle l'exemple de réalisation du dispositif de maintien montré sur les figures 1 ,2 et 3 est mis en position dans le logement et l'aimant représenté sur la figure 3 n'est pas encore incorporé dans le logement.  FIG. 4 shows a sectional view along a radial plane of the rotor body, in which the exemplary embodiment of the holding device shown in FIGS. 1, 2 and 3 is placed in position in the housing and the magnet shown in FIG. Figure 3 is not yet incorporated in the housing.
La figure 5 montre une vue de coupe similaire à la figure 4, dans laquelle l'aimant est en plus mis en position dans le logement, l'aimant et le dispositif de maintien étant ainsi maintenus en position.  Figure 5 shows a sectional view similar to Figure 4, wherein the magnet is further positioned in the housing, the magnet and the holding device thus being held in position.
Les éléments identiques, similaires ou analogues conservent la même référence d'une figure à l'autre.  Identical, similar or similar elements retain the same reference from one figure to another.
Description d'exemples de réalisation de l'invention Les figures 2,3 montrent un rotor 1 selon l'invention, d'axe X, ayant un corps 3 fixé à un moyeu central (non représenté) cannelé à sa périphérie interne pour fixation en rotation sur un arbre. Le corps 3 comporte des logements 9 destinés à recevoir des aimants permanents 14 maintenus radialement et axialement à l'aide de dispositifs de maintien 17. Plus précisément, le rotor 1 est formé par un empilement de tôles s'étendant dans un plan radial perpendiculaire à l'axe X. Le paquet de tôles forme le corps 3 du rotor 1 et est en matière ferromagnétique. Les tôles du corps 3 sont préférentiellement maintenues au moyen de rivets traversant axialement le rotor 1 de part en part. Description of embodiments of the invention Figures 2,3 show a rotor 1 according to the invention, X axis, having a body 3 fixed to a central hub (not shown) splined at its inner periphery for fixing in rotation on a shaft. The body 3 comprises housings 9 intended to receive permanent magnets 14 held radially and axially by means of holding devices 17. More specifically, the rotor 1 is formed by a stack of sheets extending in a radial plane perpendicular to the X-axis. The bundle of sheets forms the body 3 of the rotor 1 and is made of ferromagnetic material. The sheets of the body 3 are preferably maintained by means of rivets passing axially through the rotor 1 from one side to the other.
Des évidements (non représentés) peuvent être ménagés dans le corps 3. Ces évidements présentent, en vue de dessus, une forme issue de la combinaison d'une forme en triangle et d'une forme en trapèze. Le triangle présente un côté en commun avec le grand côté du trapèze. Les évidements permettent de bien canaliser le flux magnétique. Dans un autre mode de réalisation montré sur les figures ci-présentes, le corps 3 est dépourvu d'évidements.  Recesses (not shown) may be formed in the body 3. These recesses have, in top view, a shape resulting from the combination of a triangle shape and a trapezoidal shape. The triangle has one side in common with the long side of the trapeze. The recesses can channel the magnetic flux. In another embodiment shown in the figures herein, the body 3 is devoid of recesses.
Le corps 3 comporte également des logements 9 - préférentiellement de forme sensiblement parallélépipédique - destinés à recevoir des aimants permanents 14. Ces logements 9 espacés régulièrement sur la circonférence du rotor et situés dans le corps 3 du rotor 1 , présentent une direction longitudinale d'extension parallèle à l'axe X et une direction d'extension s'étendant sensiblement radialement par rapport à l'axe X. L'une des faces radiale (ou face latérale) de l'aimant forme un pôle Nord et l'autre face radiale de l'aimant un pôle Sud comme dans le document EP 0 803 962. Les logements 9, formés dans le corps 3, sont ici ouverts et préférentiellement de section globalement rectangulaire. Alternativement, le logement 9, suivant une section perpendiculaire à l'axe X, comprend a minima un passage 10 traversant propre à permettre le passage du dispositif de maintien 17 ; la section de ce passage 10 est comparativement plus grande que la plus grande des sections du dispositif de maintien 17 perpendiculaire à l'axe X, étant entendu que lors du montage, le dispositif de maintien 17 constituerait une partie mâle et le passage constituerait la partie femelle. The body 3 also comprises housings 9 - preferably of substantially parallelepiped shape - intended to receive permanent magnets 14. These housings 9 regularly spaced on the circumference of the rotor and located in the body 3 of the rotor 1, have a longitudinal direction of extension parallel to the axis X and an extension direction extending substantially radially relative to the axis X. One of the radial faces (or side face) of the magnet forms a North pole and the other radial face of the magnet a south pole as in EP 0 803 962. The housings 9, formed in the body 3, are here open and preferably of generally rectangular section. Alternatively, the housing 9, in a section perpendicular to the axis X, comprises at least a through passage 10 adapted to allow the passage of the holding device 17; the section of this passage 10 is comparatively larger than the largest section of the holding device 17 perpendicular to the X axis, it being understood that during assembly, the holding device 17 would constitute a male part and the passage would constitute the female part.
Sur les figures 1 à 5, est représenté un dispositif de maintien 17 dont une partie centrale 19 exerce par déformation un effort radial sur l'aimant 14 ainsi que sur une face axiale interne 91 a du logement. Dans un autre mode de réalisation non représenté, est également visé un dispositif de maintien dont la partie centrale 19 exerce par déformation un effort radial sur l'aimant 14 ainsi que sur une face axiale externe 91 b du logement. Sont entendues par face axiale externe 91 b et face axiale 91 a interne, les faces respectivement orientées radialement vers l'axe X du rotor 1 et côté opposé à l'axe X du rotor 1 . Autrement dit, la face axiale 91 a interne est tournée vers l'extérieur du rotor 1 ; l'extérieur du rotor 1 est la paroi radiale du rotor 1 la plus éloignée de l'axe X.  In Figures 1 to 5, there is shown a holding device 17, a central portion 19 exerts by deformation a radial force on the magnet 14 and on an inner axial face 91 of the housing. In another embodiment not shown, is also referred a holding device whose central portion 19 exerts by deformation a radial force on the magnet 14 and on an outer axial face 91 b of the housing. Are understood by outer axial face 91 b and inner axial face 91 a, the faces respectively oriented radially towards the axis X of the rotor 1 and opposite side to the axis X of the rotor 1. In other words, the inner axial face 91 is facing outwardly of the rotor 1; the outside of the rotor 1 is the radial wall of the rotor 1 furthest from the axis X.
Les logements 9 sont destinés à recevoir chacun des éléments sous la forme d'un aimant 14 ou d'une pluralité d'aimants permanents 14 superposés les uns sur les autres suivant une de leur face longitudinale pour obtenir une puissance maximale de la machine. Les aimants 14 ainsi superposés forment alors une colonne d'éléments magnétiques ayant une forme complémentaire de celle des logements 9. Les aimants 14 peuvent donc être empilés les uns sur les autres suivant une direction axiale pour former une colonne d'éléments de forme complémentaire à celle des logements 9.  The housings 9 are intended to receive each of the elements in the form of a magnet 14 or a plurality of permanent magnets 14 superimposed on each other along one of their longitudinal face to obtain maximum power of the machine. The magnets 14 thus superimposed then form a column of magnetic elements having a shape complementary to that of the housings 9. The magnets 14 can therefore be stacked on each other in an axial direction to form a column of elements of complementary shape to that of housing 9.
Les aimants 14 peuvent être en terre rare par exemple à base de The magnets 14 may be in rare earth for example based on
Samarium-Cobalt (SmCo) ou à base de Néodymium- Fer- Bore (NdFeB) ayant une haute coercivité et un taux élevé de rémanence ainsi qu'une bonne tenue en température. Ils peuvent également être en ferrite. L'utilisation d'aimants en terre rare est possible grâce au dispositif de maintien 17 décrit ci-après qui ménage les aimants 14 et au fait que l'on monte préférentiel lement plusieurs aimants dans un même logement 9. Bien entendu le nombre d'aimants dépend des applications et notamment de la longueur du corps 3. Samarium-Cobalt (SmCo) or based on Neodymium-Fer-Boron (NdFeB) having a high coercivity and a high rate of persistence as well as good temperature stability. They can also be made of ferrite. The use of rare-earth magnets is possible thanks to the holding device 17 described hereinafter which cleans the magnets 14 and the fact that several magnets are preferably mounted in the same housing 9. Of course, the number of magnets depends on the applications and in particular on the length of the body 3.
En variante on peut loger dans des logements 9 des aimants 14 en terre rare et dans d'autres logements 9 des ferrites, dont le nombre pourra être égal ou inférieur au nombre d'aimants en terre rare. Ainsi on peut utiliser des aimants en terre rare coûteux pour s'approcher au mieux par exemple d'une puissance électrique souhaitée de la machine et compléter cela par des aimants en ferrite moins coûteux. L'invention permet de faire appel à des aimants permanents de nuance différente.  Alternatively can be housed in the housing 9 magnets 14 rare earth and other housing 9 ferrites, the number may be equal to or less than the number of rare earth magnets. Thus expensive rare earth magnets can be used to get as close as possible to a desired electrical power of the machine and complete this with less expensive ferrite magnets. The invention makes it possible to use permanent magnets of different shade.
En outre dans certains des logements 9 on peut remplacer au moins l'un des aimants par un élément amagnétique, par exemple en Aluminium, de même forme pour obtenir la puissance désirée de la machine électrique. Il est ainsi formé, dans la direction axiale, une colonne d'éléments empilés les uns sur les autres et de forme complémentaire à celle des logements.  In addition, in some of the housings 9, at least one of the magnets may be replaced by a non-magnetic element, for example made of aluminum, of the same shape to obtain the desired power of the electric machine. It is thus formed, in the axial direction, a column of elements stacked on each other and of complementary shape to that of the housing.
Ainsi tous les logements 9 peuvent donc contenir une pluralité d'aimants 14 empilés selon la direction axiale avec éventuellement présence d'au moins un élément amagnétique. En variante, au moins deux logements diamétralement opposés sont vides. Grâce au fait que la colonne d'éléments comporte au moins une pluralité d'aimants empilés on peut régler aisément la puissance de la machine électrique tournante tout en conservant le même rotor.  Thus all the housings 9 may therefore contain a plurality of magnets 14 stacked in the axial direction with possibly presence of at least one non-magnetic element. Alternatively, at least two diametrically opposed housings are empty. Due to the fact that the column of elements comprises at least a plurality of stacked magnets, the power of the rotating electrical machine can be easily adjusted while keeping the same rotor.
Pour assurer un bon maintien des aimants 14 à l'intérieur de leur logement 9, le rotor 1 comporte des dispositifs de maintien 17 formés à partir d'une bande de métal allongée, dont la largeur dépend de celle du logement 9 dans lequel cette bande pénètre.  In order to ensure a good retention of the magnets 14 inside their housing 9, the rotor 1 comprises holding devices 17 formed from an elongated metal strip whose width depends on that of the housing 9 in which this band penetrates.
Ainsi ce dispositif de maintien 17 montré en particulier sur la figure 1 comprend une partie centrale 19 s'étendant axialement à l'intérieur du logement 9 entre une face axiale 91 a, 91 b du logement 9 et une face 15 d'un aimant 14, cette partie centrale 19 ayant une forme telle qu'elle exerce par déformation un effort radial sur l'aimant 14 et sur la face axiale 91 ,91 a, 91 b concernée. Selon les variantes, la partie centrale 19 est donc positionnée axialement entre des premières 92 et deuxième extrémité 93 internes de la face axiale interne 91 a du logement 9, ou, la partie centrale 19 est positionnée axialement entre des troisième 94 et quatrième 95 extrémités externes de la face axiale externe du logement. Cette partie centrale 19 présente une forme telle qu'elle exerce par déformation, lorsqu'elle est compressée entre les aimants 14 et la face axiale, un effort radial sur chaque aimant 14 du logement 9 de l'intérieur vers l'extérieur du rotor 1 ou de l'intérieur vers l'extérieur du rotor 1 . Thus, this holding device 17 shown in particular in FIG. 1 comprises a central part 19 extending axially inside the housing 9 between an axial face 91 a, 91 b of the housing 9 and a face 15 of a magnet 14. this central portion 19 having a shape such that it deforms a radial force on the magnet 14 and on the axial face 91, 91 a, 91 b concerned. According to the variants, the central portion 19 is therefore positioned axially between first 92 and second end 93 internal of the internal axial face 91a of the housing 9, or, the central portion 19 is positioned axially between the third 94 and fourth 95 external ends the outer axial face of the housing. This central portion 19 has a shape such that it exerts by deformation, when compressed between the magnets 14 and the axial face, a radial force on each magnet 14 of the housing 9 from the inside to the outside of the rotor 1 or from the inside to the outside of the rotor 1.
Du fait de l'élasticité du dispositif de maintien 17, on peut assimiler celui-ci à un ressort, plus particulièrement un ressort à lame comprenant une première position de détente et une seconde position de compression. Dans le cas présent, lorsque le dispositif de maintien 17 et l'aimant sont montés dans le rotor 2, le ressort est dans sa seconde position de compression.  Due to the elasticity of the holding device 17, it can be likened to a spring, more particularly a leaf spring comprising a first detent position and a second compression position. In this case, when the holding device 17 and the magnet are mounted in the rotor 2, the spring is in its second compression position.
Dans un exemple de réalisation, la partie centrale 19 est formée par des premières portions plates 192 se rejoignant par une première portion arrondie 191 . La première portion arrondie 191 assure ici la liaison entre les premières portions plates 192. Selon une autre variante non représentée, la partie centrale 19 est formée d'une succession de portions arrondies 191 et de portions plates 192. Les premières portions plates 192 sont destinées à être plaquées contre la face axiale 91 ,91 a, 91 b du logement 9. Les portions arrondies 191 comportent une face convexe 193 en appui contre une face 15 de l'aimant 14 du logement 9 et une face concave 194 tournée vers la face axiale 91 du logement 9.  In an exemplary embodiment, the central portion 19 is formed by first flat portions 192 joined by a first rounded portion 191. The first rounded portion 191 here provides the connection between the first flat portions 192. According to another variant not shown, the central portion 19 is formed of a succession of rounded portions 191 and flat portions 192. The first flat portions 192 are intended to be pressed against the axial face 91, 91 a, 91 b of the housing 9. The rounded portions 191 comprise a convex face 193 bearing against a face 15 of the magnet 14 of the housing 9 and a concave face 194 facing towards the face axial 91 of the housing 9.
Les dispositifs de maintien 17 comportent également des premier et second moyens de retenue 30,40. Ces premier 30 et second 40 moyens de retenue sont portés par ladite partie centrale 19 à chacune de ses extrémités 20. Les extrémités 20 de la partie centrale 19 sont préférentiellement à l'endroit des première portions plates 192 ; comme visible sur les figures 4 et 5, les extrémités 20 de la partie centrale 19 sont comprise saxialement à l'intérieur du logement 9 une fois le dispositif de maintien 17 monté (voir figure 5). A l'endroit des extrémités 20 de la partie centrale 19, le dispositif de maintien s'étend pour former les premier et second moyens de retenue. Les extrémités 20 de la partie centrale 19 sont situées axialement en regard des extrémités internes 92,93 et/ou 94,95. Ces extrémités 20 sont définies axialement à la séparation entre l'intérieur et l'extérieur du logement 9. The holding devices 17 also comprise first and second retaining means 30,40. These first 30 and second 40 retaining means are carried by said central portion 19 at each of its ends 20. The ends 20 of the central portion 19 are preferably at the location of the first flat portions 192; as shown in FIGS. 4 and 5, the ends 20 of the central portion 19 are included saxially inside the housing 9 once the holding device 17 mounted (see Figure 5). At the ends 20 of the central portion 19, the holding device extends to form the first and second retaining means. The ends 20 of the central portion 19 are located axially opposite internal ends 92, 93 and / or 94,95. These ends 20 are defined axially at the separation between the inside and the outside of the housing 9.
Comme montrés sur les figures 1 à 5, les premier 30 et second 40 moyens de retenue présentent des formes de crochet avec une partie recourbée 31 . Depuis l'extrémité terminale 32, les premier 30 et second moyens 40 de retenue se développent pour former la partie recourbée 31 puis se développent pour former une deuxième portion plate 33 s'étendant ensuite perpendiculairement pour former une troisième portion plate 34 qui rejoint l'extrémité 20 de la partie centrale 19. La troisième portion plate 34 et la première portion plate 192 de la première se rejoignent donc à l'extrémité 20, à l'endroit de la séparation entre l'intérieur et l'extérieur du logement 9..  As shown in FIGS. 1 to 5, the first 30 and second 40 retaining means have hook shapes with a curved portion 31. From the end end 32, the first 30 and second retaining means 40 develop to form the bent portion 31 and then develop to form a second flat portion 33 then extending perpendicularly to form a third flat portion 34 which joins the end 20 of the central portion 19. The third flat portion 34 and the first flat portion 192 of the first thus meet at the end 20, at the point of separation between the inside and the outside of the housing 9. .
Classiquement, les premier et second moyens de retenue 30,40 ainsi portés par ladite partie centrale 19 présentent des formes telles que lesdits moyens de retenue 30,40 exercent par déformation, un effort axial sur des faces respectivement inférieure 4 et supérieure 5 du corps 3.  Conventionally, the first and second retaining means 30,40 thus carried by said central portion 19 have shapes such that said retaining means 30,40 exert by deformation, an axial force on respectively lower 4 and upper 5 faces of the body 3 .
La deuxième portion plate 33 est positionnée radialement entre la face 15 de l'aimant (avec laquelle le dispositif de maintien 17 est en contact) et une face inférieure 4 ou supérieure 5 du corps avec laquelle la partie recourbée 31 présente un contact. Elle est positionnée axialement en dehors du logement 9.  The second flat portion 33 is positioned radially between the face 15 of the magnet (with which the holding device 17 is in contact) and a lower face 4 or upper 5 of the body with which the curved portion 31 has a contact. It is positioned axially outside the housing 9.
La troisième portion 34 est positionnée radialement entre la face longitudinale 15 de l'aimant 14 (avec laquelle le dispositif de maintien 17 est en contact) et la face axiale 91 a, 91 b (interne 91 a ou externe 91 b du logement 9). Elle est positionnée axialementà l'extérieur du logement 9 The third portion 34 is positioned radially between the longitudinal face 15 of the magnet 14 (with which the holding device 17 is in contact) and the axial face 91a, 91b (internal 91a or external 91b of the housing 9). . It is positioned axially outside the housing 9
(voir figures 4 et 5). La partie recourbée 31 , présentant au moins un contact avec la face 4,5 du corps 2, s'étend parallèlement à la face inférieure 4 ou supérieure 5 du corps 3 sur celles-ci. Ainsi, lorsque la partie recourbée est compressée, elle vient exercer un effort axial sur la face inférieure 4 ou extérieure 5 du corps 2. (see Figures 4 and 5). The curved portion 31, having at least one contact with the face 4.5 of the body 2, extends parallel to the lower face 4 or upper 5 of the body 3 thereon. Thus, when the bent portion is compressed, it comes to exert an axial force on the lower surface 4 or outer 5 of the body 2.
Comme on peut le voir sur la figure 4, il est possible de se passer de l'agencement de plaques d'extrémités pour maintenir axialement le dispositif de maintien. Alternativement, il est toutefois possible d'en agencer, dans un autre but que le maintien du dispositif de maintien 17, par exemple pour assurer un équilibrage du rotor 1 . Généralement, ces plaques d'extrémités seront réalisées dans un matériau non magnétique présentant une grande rigidité mécanique ; elles peuvent par exemple être en aluminium.  As can be seen in Figure 4, it is possible to dispense with the end plate arrangement for axially holding the holding device. Alternatively, it is however possible to arrange, for a purpose other than maintaining the holding device 17, for example to ensure a balance of the rotor 1. Generally, these end plates will be made of a non-magnetic material having a high mechanical rigidity; they may for example be aluminum.
On décrit ci-après le montage du rotor 1 selon l'invention.  The installation of the rotor 1 according to the invention is described below.
Dans une première étape montrée à la figure 4, le dispositif de maintien 17 est positionné à l'intérieur des logements 9. Plus précisément, le dispositif de maintien est positionné axialement dans un logement 9 du corps (3) de rotor 1 s'étendant suivant l'axe X. Le dispositif de maintien 17 est alors positionné de sorte que le dispositif de maintien 17 est mis en butée contre la faxe axiale 91 a, 91 b (interne ou externe) du logement 9. Dans le mode de réalisation représenté sur la figure 4, c'est la première portion plate 192 de la partie centrale 19 qui est en butée contre la face axiale 91 ,91 a, 91 b du logement 9 ; la portion arrondie 191 , elle, est sensiblement à distance de la face axiale 91 ,91 a, 91 b du logement 9, elle s'étend de telle manière que la distance radiale entre la portion arrondie In a first step shown in FIG. 4, the holding device 17 is positioned inside the housings 9. More specifically, the holding device is positioned axially in a housing 9 of the rotor body 1 (3) extending along the axis X. The holding device 17 is then positioned so that the holding device 17 is abutted against the axial fax 91a, 91b (internal or external) of the housing 9. In the embodiment shown in Figure 4, it is the first flat portion 192 of the central portion 19 which abuts against the axial face 91, 91 a, 91 b of the housing 9; the rounded portion 191, it is substantially at a distance from the axial face 91, 91 a, 91 b of the housing 9, it extends in such a way that the radial distance between the rounded portion
192 et la face axiale opposée 91 a, 91 b à celle dont elle est proche est légèrement inférieure à la dimension radiale de l'aimant 14 correspondante. Les premier 30 et second 40 moyens de retenue, en saillie par rapport au logement 9, exercent des efforts axiaux sur les faces inférieures 4 et supérieur 5 du corps 3. Concernant les détails relatifs à la coopération des moyens de retenue avec le corps 3, il convient de se référer aux éléments de description ci-avant. Le dispositif de maintien 17 est alors retenu axialement par les premier 30 et second 40 moyens de retenue portés par le dispositif de maintien 17 et agissant sur le corps 3. 192 and the opposite axial face 91a, 91b to that of which it is close is slightly smaller than the radial dimension of the corresponding magnet 14. The first 30 and second 40 retaining means, projecting from the housing 9, exert axial forces on the lower faces 4 and upper 5 of the body 3. With regard to the details relating to the cooperation of the retaining means with the body 3, it is appropriate to refer to the elements of description above. The holding device 17 is then retained axially by the first 30 and second 40 retaining means carried by the holding device 17 and acting on the body 3.
Dans une étape suivante montrée sur la figure 5, au moins un élément sous la forme d'un aimant 15 permanent est inséré dans le logement 9 et maintenu radialement et axialement par le dispositif de maintien 17. Typiquement, les aimants sont enfilés axialement en force à l'intérieur du logement 9. La partie centrale 19 du dispositif de maintien 17 applique alors, du fait de la déformation de la partie centrale 19 (notamment de sa partie arrondie 191 ), un effort radial de maintien sur l'aimant 15 contenu dans le logement 9. Cet effet ressort permet l'insertion puis le maintien du dispositif de maintien 17Une plaque d'extrémité peut ensuite être plaqué contre la face inférieure 4 et/ou supérieur 5 du corps 3 à des fins d'équilibrage, comme décrit ci-avant.  In a next step shown in FIG. 5, at least one element in the form of a permanent magnet is inserted into the housing 9 and held radially and axially by the holding device 17. Typically, the magnets are axially threaded in force. inside the housing 9. The central portion 19 of the holding device 17 then applies, due to the deformation of the central portion 19 (in particular of its rounded portion 191), a radial holding force on the magnet 15 contained in the housing 9. This spring effect allows the insertion and then the maintenance of the holding device 17.An end plate can then be pressed against the lower face 4 and / or upper 5 of the body 3 for balancing purposes, as described. above.
Ainsi qu'il ressort de la description et des dessins le dispositif de maintien 17 est une pièce élastique en forme de bande de matière, qui présente une partie centrale 19 et des premier 30 et second 40 moyens de retenue élastiquement déformables pour exercer respectivement un effort radial et axial sur les aimants permanents. La partie centrale 19 à action radiale permet de ménager les aimants 14 car ceux-ci sont moins sensibles aux chocs et aux vibrations du fait de cette partie centrale 19. Les premier 30 et second 40 moyens de retenue à action axiale permet également de ménager les aimants 14 et de rendre ceux-ci encore moins sensibles aux chocs et aux vibrations. Les aimants 14 ont une bonne tenue à la force centrifuge grâce au dispositif de maintien 17. En outre les tolérances de fabrication des logements 9 et des aimants 14 peuvent être larges du fait que la partie centrale 19 et les premier 30 et second 40 moyens de retenue rattrapent les jeux dûs aux tolérances de fabrication.  As can be seen from the description and the drawings, the holding device 17 is an elastic piece in the form of a strip of material, which has a central portion 19 and first and second elastically deformable retaining means 40 for exerting respectively a force radial and axial on the permanent magnets. The central part 19 with radial action makes it possible to protect the magnets 14 because they are less sensitive to shocks and vibrations because of this central portion 19. The first 30 and second 40 axially acting retaining means also make it possible to protect the magnets 14 and make them even less sensitive to shocks and vibrations. The magnets 14 have good resistance to centrifugal force thanks to the holding device 17. In addition, the manufacturing tolerances of the housings 9 and the magnets 14 can be large because the central portion 19 and the first 30 and second 40 means of restraint catches the games due to manufacturing tolerances.
On appréciera que la présence du dispositif de maintien 17 des aimants permet d'améliorer la tenue radiale des aimants sans mouvement de ceux-ci, malgré les tolérances de fabrication. Bien entendu, l'homme du métier pourra apporter des modifications aux différentes formes du corps 3 du rotor 1 et des dispositifs de maintien 17 décrites dans les figures sans sortir du cadre de l'invention. It will be appreciated that the presence of the magnets holding device 17 makes it possible to improve the radial resistance of the magnets without moving them, despite the manufacturing tolerances. Of course, those skilled in the art can make modifications to the various shapes of the body 3 of the rotor 1 and the holding devices 17 described in the figures without departing from the scope of the invention.
Ce dispositif de maintien 17 en forme de bande de matière est dans un mode de réalisation en acier à ressort. Dans un autre mode de réalisation le dispositif 17 est en matière plastique avantageusement ou en tout autre matière, par exemple métallique. Ces dispositifs 17 pourront être dotés d'un revêtement pour le contact avec les des aimants.  This holding device 17 in the form of a strip of material is in a spring steel embodiment. In another embodiment, the device 17 is made of plastic material advantageously or in any other material, for example metallic. These devices 17 may be provided with a coating for contact with the magnets.
Dans une variante :  In a variant:
- le dispositif de maintien 17 est mis en butée contre une face axiale interne 91 a du logement 9,  the holding device 17 is abutted against an inner axial face 91a of the housing 9,
- un autre dispositif de maintien 17 est monté dans le rotor 1 ; cet autre dispositif de maintien 17 est mis en butée contre une face axiale externe 91 b du logement 9.  another holding device 17 is mounted in the rotor 1; this other holding device 17 is abutted against an outer axial face 91 b of the housing 9.
De cette façon, le rotor comprend deux dispositifs de maintien 17 s'étendant sur les deux faces axiales 91 a, 91 b opposées. Une fois les deux dispositifs 17 montés et l'aimant 14 inséré, les faces 15 longitudinales opposées de l'aimant 14 présentent chacune un contact avec la partie centrale 19 du dispositif 17 qui lui correspond.  In this way, the rotor comprises two holding devices 17 extending on the two axial faces 91a, 91b opposite. Once the two devices 17 are mounted and the magnet 14 inserted, the opposite longitudinal faces 15 of the magnet 14 each have a contact with the central portion 19 of the device 17 which corresponds to it.

Claims

REVENDICATIONS
1 . Rotor (1 ) à aimants permanents comportant : 1. Rotor (1) with permanent magnets comprising:
- un paquet de tôles formant le corps (3) du rotor (1 )ayant un axe (X), et,  a bundle of plates forming the body (3) of the rotor (1) having an axis (X), and
- des logements (9) espacés régulièrement sur la circonférence du rotor (1 ) et situés dans le corps (3) du rotor (1 ), dont certains reçoivent au moins un élément sous la forme d'un aimant (14) permanent,  - housings (9) spaced regularly on the circumference of the rotor (1) and located in the body (3) of the rotor (1), some of which receive at least one element in the form of a permanent magnet (14),
caractérisé en ce que le rotor (1 ) comporte en outre des dispositifs de maintien (17) comportant chacun : characterized in that the rotor (1) further comprises holding devices (17) each comprising:
- une partie centrale (19) s'étendant axialement à l'intérieur d'un logement (9) entre une face axiale (91 ,91 a,91 b) du logement (9) et une face (15) d'un aimant (14), cette partie centrale (19) ayant une forme telle qu'elle exerce par déformation un effort radial sur l'aimant (14) et sur la face axiale (91 , 91 a, 91 b),  a central part (19) extending axially inside a housing (9) between an axial face (91, 91 a, 91 b) of the housing (9) and a face (15) of a magnet (14), this central portion (19) having a shape such that it deforms a radial force on the magnet (14) and on the axial face (91, 91 a, 91 b),
- des premier (30) et second (40) moyens de retenue portés par ladite partie centrale (19) à chacune de ses extrémités (20) et faisant saillie par rapport au logement (9) suivant l'axe (X), chacun desdits premier et second moyens de retenue (30,40) ayant des formes telles qu'ils exercent par déformation, un effort axial sur des faces respectivement inférieure (4) et supérieure (5) dudit corps (3).  - first (30) and second (40) retaining means carried by said central portion (19) at each of its ends (20) and projecting from the housing (9) along the axis (X), each of said first and second retaining means (30,40) having such shapes that they exert by deformation, an axial force on respectively lower (4) and upper (5) faces of said body (3).
2. Rotor (1 ) selon la revendication 1 , caractérisé en ce que la partie centrale (19) s'étend axialement entre une face axiale interne (91 a) du logement (9) et la face (15) d'un aimant (14), ladite face axiale interne (91 a) étant tournée vers la paroi radiale du rotor (1 ) la plus éloignée de l'axe (X) du rotor (1 ). 2. Rotor (1) according to claim 1, characterized in that the central portion (19) extends axially between an inner axial face (91 a) of the housing (9) and the face (15) of a magnet ( 14), said inner axial face (91 a) being turned towards the radial wall of the rotor (1) furthest from the axis (X) of the rotor (1).
3. Rotor (1 ) selon la revendication 1 , caractérisé en ce que la partie centrale (19) s'étend axialement entre une face axiale externe (91 b) du logement (9) et la face (15) d'un aimant (14), ladite face axiale externe (91 b) étant la face orientée radialement vers l'axe (X) du rotor (1 ). 3. Rotor (1) according to claim 1, characterized in that the central portion (19) extends axially between an outer axial face (91 b) of the housing (9) and the face (15) of a magnet (14), said external axial face (91b) being the face oriented radially towards the axis (X) of the rotor (1).
4. Rotor (1 ) selon l'une des revendications précédentes, caractérisé en ce que la partie centrale (19) est formée d'une succession de portions arrondies (191 ) et de portions plates (192). 4. Rotor (1) according to one of the preceding claims, characterized in that the central portion (19) is formed of a succession of rounded portions (191) and flat portions (192).
5. Rotor (1 ) selon la revendication précédente, caractérisé en ce que la partie centrale (19) est formée par des portions plates (192) se rejoignant par une portion arrondie (191 ). 5. Rotor (1) according to the preceding claim, characterized in that the central portion (19) is formed by flat portions (192) joining by a rounded portion (191).
6. Rotor (1 ) selon la revendication 4, caractérisé en ce que la portion arrondie (191 ) comporte une face convexe (193) en appui contre une face (15) de l'aimant (14) et une face concave (194) tournée vers la face axiale (91 a,91 b) du logement (9). 6. Rotor (1) according to claim 4, characterized in that the rounded portion (191) has a convex face (193) bearing against a face (15) of the magnet (14) and a concave face (194). turned towards the axial face (91 a, 91 b) of the housing (9).
7. Rotor (1 ) selon l'une des revendications précédentes, caractérisé en ce que les premier et second moyens de retenue (30,40) présentent des formes de crochet avec une partie recourbée (31 ). 7. Rotor (1) according to one of the preceding claims, characterized in that the first and second retaining means (30,40) have hook shapes with a bent portion (31).
8. Rotor (1 ) selon l'une quelconque des revendications 1 à 5, caractérisé en ce que, depuis une extrémité terminale (32), les premier et second moyens de retenue (30,40) se développent pour former une partie recourbée (31 ), puis former une deuxième portion plate (33) s'étendant ensuite perpendiculairement pour former une troisième portion plate (34) qui rejoint l'extrémité (20) de la partie centrale (19). 8. Rotor (1) according to any one of claims 1 to 5, characterized in that, from an end end (32), the first and second retaining means (30,40) develop to form a curved portion ( 31), then forming a second flat portion (33) then extending perpendicularly to form a third flat portion (34) which meets the end (20) of the central portion (19).
9. Rotor (1 ) selon la revendication 7, caractérisé en ce que ladite deuxième portion plate (33) est positionnée axialement en dehors du logement (9). 9. Rotor (1) according to claim 7, characterized in that said second flat portion (33) is positioned axially outside the housing (9).
10. Rotor (1 ) (1 ) selon l'une quelconque des revendications 7 ou 8, caractérisé en ce que la partie recourbée (31 ), présentant au moins un contact avec la face (4,5) du corps (3), s'étend parallèlement à la face (4,5) du corps (3) sur celle-ci, notamment parallèlement le long de cette face. 10. Rotor (1) (1) according to any one of claims 7 or 8, characterized in that the bent portion (31) having at least one contact with the face (4,5) of the body (3), extends parallel to the face (4,5) of the body (3) thereon, in particular parallel along this face.
1 1 . Machine électrique tournante comprenant une rotor selon l'une des revendications 1 à 10. 1 1. Rotary electric machine comprising a rotor according to one of claims 1 to 10.
12. Procédé de montage d'un rotor (1 ) comportant les étapes suivantes : 12. A method of mounting a rotor (1) comprising the following steps:
a) un dispositif de maintien est positionné axialement dans un logement (9) d'un corps (3) de rotor (1 ) s'étendant suivant un axe a) a holding device is positioned axially in a housing (9) of a body (3) of rotor (1) extending along an axis
(X). (X).
b) le dispositif de maintien (17) est mis en butée contre une face axiale b) the holding device (17) is abutted against an axial face
(91 ,91 a,91 b) du logement (9)), (91, 91 a, 91 b) of the housing (9),
c) le dispositif de maintien (17) est retenu axialement par des premier c) the holding device (17) is retained axially by first
(30) et second (40) moyens de retenue portés par le dispositif de maintien (17) et agissant sur le corps (3), (30) and second (40) retaining means carried by the holding device (17) and acting on the body (3),
d) ensuite, au moins un élément sous la forme d'un aimant (14) permanent est inséré dans le logement (9) et maintenu radialement et axialement par le dispositif de maintien (17).  d) then, at least one element in the form of a permanent magnet (14) is inserted into the housing (9) and held radially and axially by the holding device (17).
13. Procédé de montage d'un rotor (1 ) selon la revendication précédente, dans lequel une partie centrale (19), comprise entre les premier (30) et second (40) moyens de retenue et portant ceux-ci, exerce par déformation un effort radial sur ledit aimant (14) permanent. 13. A method of mounting a rotor (1) according to the preceding claim, wherein a central portion (19), between the first (30) and second (40) retaining means and carrying thereof, exerts by deformation. a radial force on said permanent magnet (14).
14. Procédé selon l'une quelconque des revendications 12 à 13, dans lequel, durant l'étape d), un élément sous la forme d'un aimant (14) est enfilé axialement à force à l'intérieur du logement (9). The method according to any one of claims 12 to 13, wherein during step d), an element in the form of a magnet (14) is forced axially into the housing (9). .
15. Procédé de montage d'un rotor (1 ), selon l'une quelconque des revendications 12 à 14, dans lequel les premier (30) et second (40) moyens de retenue, en saillie par rapport au logement (9), exercent chacun par déformation, une effort axial sur des faces respectivement inférieure et supérieure dudit corps (3). 15. A method of mounting a rotor (1) according to any one of claims 12 to 14, wherein the first (30) and second (40) retaining means, projecting from the housing (9), each exert by deformation, an axial force on respectively lower and upper sides of said body (3).
16. Procédé de montage d'un rotor (1 ), selon l'une quelconque des revendications 12 à 15, dans lequel durant l'étape b), le dispositif de maintien (17) est mis en butée contre une face axiale interne (91 a) du logement (9). 16. A method of mounting a rotor (1), according to any one of claims 12 to 15, wherein during step b), the holding device (17) is abutted against an inner axial face ( 91 a) of the dwelling (9).
17. Procédé de montage de rotor (1 ) selon la revendication 16, dans lequel un autre dispositif de maintien (17) est monté dans le rotor (1 ) suivant les étapes a),b),c) et d) ; durant l'étape b) de montage de l'autre dispositif de maintien (17), cet autre dispositif de maintien (17) est mis en butée contre une face axiale externe (91 b) du logement (9). The rotor mounting method (1) according to claim 16, wherein another holding device (17) is mounted in the rotor (1) according to steps a), b), c) and d); during step b) of mounting the other holding device (17), this other holding device (17) is abutted against an outer axial face (91 b) of the housing (9).
PCT/FR2015/052886 2014-11-12 2015-10-27 Magnet-retaining device for a rotor WO2016075385A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15808696.7A EP3218992A1 (en) 2014-11-12 2015-10-27 Magnet-retaining device for a rotor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1460911 2014-11-12
FR1460911A FR3028360B1 (en) 2014-11-12 2014-11-12 MAGNET HOLDING DEVICE FOR ROTOR

Publications (1)

Publication Number Publication Date
WO2016075385A1 true WO2016075385A1 (en) 2016-05-19

Family

ID=53008573

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2015/052886 WO2016075385A1 (en) 2014-11-12 2015-10-27 Magnet-retaining device for a rotor

Country Status (3)

Country Link
EP (1) EP3218992A1 (en)
FR (1) FR3028360B1 (en)
WO (1) WO2016075385A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3064130B1 (en) * 2017-03-15 2019-06-07 Valeo Equipements Electriques Moteur ROTOR OF ROTATING ELECTRIC MACHINE HAVING PERMANENT MAGNET HOLDING PIECES
FR3074978B1 (en) * 2017-12-11 2020-06-12 Valeo Equipements Electriques Moteur ROTATING ELECTRIC MACHINE PROVIDED WITH HOLDERS FOR PERMANENT MAGNET SPRINGS

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008018724A1 (en) * 2008-04-14 2009-10-22 Siemens Aktiengesellschaft Secondary part i.e. rotor, for e.g. two-pole synchronous motor, has positioning elements e.g. steel tape, for positioning permanent magnets in magnet bags, and magnet bags with recesses for accommodation of positioning elements
FR2963175A1 (en) * 2010-07-22 2012-01-27 Ssd Parvex Sas Rotor for synchronous motor, has elastic element exerting restoring force of magnets toward predetermined position in housing, where elastic element is support on face of magnets and housings
WO2013175117A1 (en) * 2012-05-24 2013-11-28 Valeo Equipements Electriques Moteur Electric machine rotor and associated permanent magnet holding device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008018724A1 (en) * 2008-04-14 2009-10-22 Siemens Aktiengesellschaft Secondary part i.e. rotor, for e.g. two-pole synchronous motor, has positioning elements e.g. steel tape, for positioning permanent magnets in magnet bags, and magnet bags with recesses for accommodation of positioning elements
FR2963175A1 (en) * 2010-07-22 2012-01-27 Ssd Parvex Sas Rotor for synchronous motor, has elastic element exerting restoring force of magnets toward predetermined position in housing, where elastic element is support on face of magnets and housings
WO2013175117A1 (en) * 2012-05-24 2013-11-28 Valeo Equipements Electriques Moteur Electric machine rotor and associated permanent magnet holding device

Also Published As

Publication number Publication date
FR3028360A1 (en) 2016-05-13
EP3218992A1 (en) 2017-09-20
FR3028360B1 (en) 2019-03-22

Similar Documents

Publication Publication Date Title
EP2856612B1 (en) Electric machine rotor and associated permanent magnet holding device
EP2959566B1 (en) Mobile magnet holding piece for a permanent magnet synchronous machine
US20100176678A1 (en) Electric motor
EP3028373A2 (en) Claw pole rotor comprising a clip for retaining an end-of-winding wire and associated electric machine
EP2856613B1 (en) Rotor of an electric machine and associated permanent magnet retaining spring
WO2016075385A1 (en) Magnet-retaining device for a rotor
WO2015015084A2 (en) Rotor with permanent magnets
FR3069973A1 (en) ROTOR OF ROTATING ELECTRIC MACHINE HAVING A FLANGE HAVING FUNCTION FOR HOLDING PERMANENT MAGNETS
WO2019011760A1 (en) Rotor for a rotating electric machine provided with tabs for retaining permanent magnets
EP2879275A1 (en) Method for assembling a rotor of a rotary electrical machine by riveting, corresponding rotor and compressor
EP3259830B1 (en) Rotor of rotary electric machine with permanent magnet segments
EP3990792B1 (en) Rotating electrical machine equipped with a rolling bearing pretensioning member
FR3055484A1 (en) ROTOR OF ROTATING ELECTRIC MACHINE WITH AT LEAST ONE CURVED PORTION OF RECEIVING A SPRING
WO2016146909A1 (en) Rotor of an electrical rotating machine with an optimised configuration of permanent magnets
WO2018042124A1 (en) Rotor for a rotary electric machine provided with at least one deformable portion for filling a cavity
FR3069974A1 (en) ROTOR OF ROTATING ELECTRIC MACHINE WITH IMPROVED FLASK MOUNTING SYSTEM
FR3079686A1 (en) ROTOR OF ROTATING ELECTRIC MACHINE PROVIDED WITH HOLDING TABS OF PERMANENT MAGNETS
FR3055483A1 (en) ROTOR OF ROTATING ELECTRIC MACHINE WITH AT LEAST ONE DEFORMABLE TAB FOR FILLING A PARASITE AIR BLADE
FR3074978A1 (en) ROTATING ELECTRIC MACHINE WITH HOLDING BITS FOR PERMANENT MAGNET SPRINGS
WO2019025193A1 (en) Rotor of rotating electric machine provided with a part for holding permanent magnets in three dimensions
WO2018146391A1 (en) Rotor for a rotating electrical machine provided with balancing holes
WO2017182742A1 (en) Rotating electrical machine with contacts for connecting phase windings and terminals of a connector
WO2017098143A1 (en) Stator of a rotary electrical machine provided with a flange for insulating the winding
FR3033960A1 (en) ROTOR OF ROTATING ELECTRIC MACHINE WITH IMPLANTATION OF OPTIMIZED MOUNTING MEANS

Legal Events

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

Ref document number: 15808696

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

REEP Request for entry into the european phase

Ref document number: 2015808696

Country of ref document: EP