WO2008031995A2 - Arbre de rotor a griffes, rotor a griffes equipe d'un tel arbre et machine electrique tournante equipee d'un tel rotor - Google Patents
Arbre de rotor a griffes, rotor a griffes equipe d'un tel arbre et machine electrique tournante equipee d'un tel rotor Download PDFInfo
- Publication number
- WO2008031995A2 WO2008031995A2 PCT/FR2007/051927 FR2007051927W WO2008031995A2 WO 2008031995 A2 WO2008031995 A2 WO 2008031995A2 FR 2007051927 W FR2007051927 W FR 2007051927W WO 2008031995 A2 WO2008031995 A2 WO 2008031995A2
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- WIPO (PCT)
- Prior art keywords
- crimping
- shaft
- zone
- rotor
- zones
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/064—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable
- F16D1/072—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable involving plastic deformation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/04—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
- H02K11/049—Rectifiers associated with stationary parts, e.g. stator cores
- H02K11/05—Rectifiers associated with casings, enclosures or brackets
Definitions
- the invention relates to a claw rotor shaft, a claw rotor equipped with such a shaft and a rotary electric machine equipped with such a rotor.
- FIG. 1 hereinafter describes such a machine in the form of a compact and polyphase alternator, especially for a motor vehicle.
- This alternator transforms mechanical energy into electrical energy and can be reversible.
- Such a reversible alternator is called an alternator-starter and in another mode of operation transforms electrical energy into mechanical energy in particular to start the engine of the vehicle.
- This machine essentially comprises a housing 1 and, inside thereof, a rotor 2 with claws, integral in rotation with a shaft 3, and a stator 4, which surrounds the rotor with the presence of a small gap and which comprises a body in the form of a pack of sheets with notches, here of the semi-closed type, equipped with notch insulator for mounting the phases of the stator, each comprising at least one winding forming part and other of the body of the stator a bun 5.
- the windings are obtained for example from a continuous wire covered with enamel or from bar-like conductor elements, such as pins connected together for example by welding.
- windings are, for example, three-phase windings connected in a star or in a triangle, the outputs of which are connected to at least one rectifier bridge comprising rectifying elements such as diodes or transistors of the MOSFET type, in particular when it is a question of an alternator-starter as described for example in the document FR A 2,745,445 (US A 6,002,219).
- the number of phases depends on the applications and can be greater than three, one or two bridge rectifiers can be provided.
- the claw rotor 2 (FIGS. 1 and 2) comprises two axially juxtaposed and ring-shaped polar wheels 7, 8 each having a transverse flange provided at its outer periphery with trapezoidal teeth 9 directed axially towards the flange of the other wheel.
- polar the tooth of a pole wheel penetrating into the space between two adjacent teeth 9 of the other pole wheel, so that the teeth of the pole wheels are interleaved.
- the flanges of the wheels 7, 8 are of annular shape and have at their outer periphery radial projections (not referenced) connected by chamfers to the teeth 9. These projections form claws with the teeth 9.
- the number of teeth 9 depends on the applications and in particular the number of phases of the stator. In Figure 2 is provided eight teeth per pole wheel. Alternatively each pole wheel has six or seven teeth.
- a cylindrical core is interposed axially between the flanges of the wheels 7,8.
- this core consists of two half-cores each belonging to one of the flanges.
- This core carries at its outer periphery an excitation winding 10.
- An insulator such as a winding support coil 10, is interposed radially between the core and the winding 10.
- the shaft 3 of the rotor 2 carries at its front end a drive member, such as a pulley 12 belonging to a device for transmitting movements to at least one belt between the alternator and the engine of the motor vehicle, and at its rear end 13, of reduced diameter, slip rings connected by wire bonds to the ends of the rotor excitation winding.
- the wired links and the slip rings belong here to an attached manifold of the type described in FR 2,710,197.
- Brooms belong to a brush holder 14 and are arranged so as to rub on the slip rings.
- the brush holder is connected to a voltage regulator.
- the front and rear ends of the shaft 3 therefore each have several sections.
- the rotor 2 made of ferromagnetic material, is magnetized and becomes an inductor rotor with the formation of magnetic poles at the teeth of the pole wheels.
- This inductive rotor 10 creates an alternating induced current in the stator induced when the shaft 3 rotates, the rectifier bridge or bridges for transforming the induced alternating current into a direct current, in particular for powering the loads and consumers of the electrical system. vehicle, and to recharge the battery of said vehicle.
- the housing 1 carries internally at its outer periphery the stator 4 and centrally rotating the shaft 3.
- This housing is here in two parts, namely a front bearing 16 adjacent to the pulley 12 and a rear bearing 17 carrying the brush holder, the voltage regulator and at least one bridge rectifier.
- the bearings are of hollow form and each comprise a ball bearing respectively 19 and 20 for the rotational mounting of the shaft 3 of the rotor 2.
- the diameter of the bearing 19 is greater than that of the bearing 20.
- the bearings are, in Figure 1, perforated to allow cooling of the alternator by air circulation.
- the rotor 2 carries at least at one of its axial ends a fan intended to ensure this circulation of air.
- a fan 23 is provided on the front end face of the rotor and another fan 24, more powerful, on the rear back face of the rotor, each fan being provided with a plurality of blades 25, 26.
- the power of the machine can be further increased by using more efficient fans such as fans obtained by superimposition of two elementary fans each comprising a series of blades as described for example in the document FR A 2,741,912 and as visible in FIG. 1 for the rear fan 24.
- more efficient fans such as fans obtained by superimposition of two elementary fans each comprising a series of blades as described for example in the document FR A 2,741,912 and as visible in FIG. 1 for the rear fan 24.
- the alternator can also be water cooled, the housing then being configured to include a suitable water circulation channel.
- the performance, ie power and efficiency, of the rotating electrical machine can be improved by using a rotor having the configuration shown in Figure 2.
- the rotor comprises, so example described for example in French Patents N 0 2793085 and 2784248, a number of permanent magnets 38 arranged symmetrical with respect to the axis of the rotor and interposed between two teeth 9 adjacent to the inner periphery of the stator.
- the number of magnets is equal to the number of pairs of poles.
- the shaft 3 and the pole wheels 7, 8 are here made of steel, the pole wheels being made of mild steel and the shaft 3 being made of harder steel.
- the shaft 3 has a smooth intermediate portion between its two protruding knurled portions.
- the diameter of this smooth intermediate portion is equal to that of the front end of the shaft for mounting the bearing 19.
- the rear end of the shaft 3 is of smaller diameter.
- a radial clearance exists between the inner periphery of the pole wheel 8 and the outer periphery of the smooth intermediate section.
- the axial length of this smooth intermediate section is smaller than that of the knurled portions.
- the wheels 7,8 Prior to this press fit, the wheels 7,8 are pressed against each other, in particular for good passage of the magnetic flux. This has the effect of reducing the inner diameter of the pole wheels so that the force required to grip the shaft is increased.
- the shaft may flare, knowing that the rear end of this shaft is of reduced diameter for mounting the slip rings.
- the ridges of the knurled portions are never oriented in a perfectly rectilinear manner in an axial direction, but they are generally helical in shape, which causes the appearance of torsional stress capable of causing a relative rotational movement between the pole wheels when the pressure force on these is released.
- the nonuniform deformations generated during the fitting of the knurled portion shaft in the pole wheels do not make it possible to obtain a sufficiently precise concentricity of the pole wheels with respect to the axis of the shaft so that it is necessary to perform a machining operation of the outer periphery of the teeth of the wheels to ensure a small air gap between the rotor and the stator, and a good concentricity between the outer periphery of the teeth and the axis of the shaft .
- the claw rotor comprises a stepped main polar wheel carrying at its outer periphery, via a non-magnetic ring, the teeth of the other polar wheel devoid of flange, the excitation winding being carried by a fixed core.
- the present invention aims to overcome these disadvantages.
- a claw rotor shaft of the above-mentioned type having a front end provided with a plurality of sections, a rear end and an intermediate section for supporting and fixing the claw rotor having, on the one hand, two knurled areas, said crimping zones, intended to be assembled with the claw rotor by local deformation of material of the claw rotor (2), and secondly, a centering zone intended to center the claw rotor and disposed between the clawing zones.
- crimping said centering zone extending radially projecting from the crimping zones, is characterized in that the crimping zones extend in radial projection relative to the radially larger section of the front end of the crimping zone.
- the rotating electrical machine being brushless
- the crimping zones are assembled with the axial ends of the main pole wheel.
- each crimping zone is assembled with one of the pole wheels.
- the intermediate support and fixing section is thicker than the end before the shaft so that it has good mechanical strength.
- the machining of the crimping zones is easier to achieve because they are radially protruding relative to the front end of the shaft.
- At least one of the crimping zones may be extended to secure another component of the rotating electrical machine, such as the spacer 159 of FIG.
- a claw rotor is characterized in that it is equipped with a shaft of the aforementioned type mounted in its central bore.
- This rotor is assembled with the shaft by local deformation of material at the crimping zones of the shaft.
- the main wheel of the claw rotor is assembled with the shaft by local material deformation of the main pole wheel at the crimping areas of the shaft.
- the pole wheels of the claw rotor are assembled with the shaft by local deformation of the material of the pole wheels at the crimping zones.
- This deformation is a plastic deformation, the material of the main polar wheel or fluent polar wheels.
- the main pole wheel or each pole wheel has an imprint, such as an annular shape imprint optionally divided, respectively at the front and rear face of the rotor.
- the material of the polar wheel is pushed back inwards and towards the crimping zone concerned of the shaft.
- a rotary electric machine is characterized in that it is equipped with fixing of such a claw rotor.
- the shaft does not risk flaming when it fits into the main pole wheel or the pole wheels because the crimping areas have a radially smaller size than the centering zone and that one achieves a centering fit between the shaft and the bore (s) respectively of the main pole wheel and the pole wheels.
- the mechanical stresses between the shaft and the main pole wheel or the pole wheels are reduced because it is the material of the main pole wheel or the pole wheels that penetrates the crimping zones.
- the general configuration of the main polar wheel or the pole wheels is maintained and it is taken advantage of the fact that the main polar wheel or the pole wheels have a hardness lower than that of the shaft, which makes it possible to deform those and flowing the material of the main pole wheel or the pole wheels of the crimping areas.
- the machining of the internal bore of the pole wheels is simplified since it could not predict, as in FIG. 1, a frustoconical portion at the end of the bore of the half core of a wheel. polar.
- This outer periphery is machined beforehand by means of a tool, that is to say before mounting the excitation winding between the flanges of the pole wheels and on the core, so that chips do not risk 'damage this excitation coil not present at this stage.
- the tool can be lubricated, which is not possible when the excitation winding is present.
- the configuration of the shaft according to the invention makes it easy to mount permanent magnets between two adjacent teeth of the rotor. Thus we can mount the magnets on a pole wheel and present the other pole wheel in the correct angular position. This configuration will not be modified by the introduction of the shaft because there is no occurrence of torsional stress likely to cause relative movement between the wheels when the pressure force on the wheels is released.
- the crimping zones are separated from the centering zone each by a separating means, such as a groove for preserving the centering zone and releasing the machining tools of the knurling crimping areas.
- the centering zone is smooth.
- this centering zone is divided and comprises at least two smooth portions.
- the centering zone is of circular section as well as the crimping zones and the outer diameter of the centering zone is greater than that of the crimping zones of the shaft.
- the radially larger section of the front end of the shaft is also cylindrical and has a smaller diameter than the crimping zones.
- the pole wheels can be rotated relative to one another, then in intimate contact with the centering zone of the larger diameter shaft. crimping areas without damaging the front end of the shaft.
- the centering zone has a length greater than that of each crimping zone.
- the crimping zones of the shaft comprise axially oriented ridges and are each associated with a groove, called a crimping groove.
- the ridges allow to lock in rotation the pole wheels relative to the shaft, while the grooves allow to lock in translation the pole wheels relative to the shaft.
- the crimping groove is deeper than the separating groove.
- At least one of the grooves is made in a crimping zone.
- one of the crimping zones may comprise crossed striations and the other of the axial orientation striations in combination with a groove made in this zone or adjacent to this zone.
- FIG. 1 is an axial sectional view of a rotary electrical machine of the state of the art
- FIG. 2 is a perspective view of a rotor of a rotating electrical machine equipped with permanent magnets to increase the power of the machine;
- FIG. 3 is a front view of a first embodiment of the claw rotor shaft according to the invention
- FIG. 4 is a view similar to FIG. 3 for a second embodiment according to the invention
- FIG. 5 is an axial sectional view of the claw rotor equipped with the shaft of Figure 3 before the crimping operation of the rotor on the crimping areas;
- FIG. 6 is a partial view in axial section of the claw rotor, without the excitation winding; equipped with the shaft of Figure 4 before the crimping operation of the rotor on the crimping areas;
- FIG. 7 is a partial view of FIG. 5 showing the crimping tool before penetrating into the crimping recess of the rear polar wheel;
- FIG. 8 is a perspective view showing the rear polar wheel and the end of the shaft equipped with its attached manifold, as well as the crimping tool before the crimping operation;
- FIGS 9, 9A, 9B are partial views showing the various steps of the crimping operation of the assembly of the rear polar wheel with the crimping area concerned the shaft;
- Figure 10 is a partial view similar to Figure 4 for yet another embodiment.
- FIGS. 3 and 4 show two embodiments of the shaft 3 according to the invention intended to be assembled with pole wheels 7, 8 of FIG.
- This shaft here metallic, has front ends 31, 60, 32 and rear 13 identical to those of the shaft of FIG. 1 and an intermediate support and fixing portion of the pole wheels of the rotor 2.
- the shaft 3 is made of a material that is harder than the pole wheels 7, 8 of the claw rotor 2, which is also metallic.
- pole wheels 7, 8 are mild steel, while the shaft 3 is made of steel with a higher carbon content than the wheels 7.8.
- the front end of the shaft has several sections, one of which is radially larger.
- the front end of the shaft 3 comprises a second smooth section 32 mounting the inner ring of the front ball bearing 19, a connecting groove 60 of the second section to a first threaded portion 31 for screwing the nut 160 of Figure 1.
- the sections 31, 32 are here cylindrical and it is the same for the shaft 3.
- the second section 32 has a diameter D3 greater than the diameter of the threaded section 31.
- the nut 160 makes it possible to tighten the pulley 12, the inner ring of the bearing 19 and a spacer 159 between the nut and the front face of the front polar wheel 7.
- FIGS. 3 and 4 The rear end 13 of the cylindrical shaft 3 is represented in these FIGS. 3 and 4, as well as in the figures, FIGS. 6, 9, 9A, 9B, without the mounting of the slip rings and the attached collector of FIG. 1, represented in 100 in FIGS. 5, 7 and 8.
- each pole wheel has six claws, alternatively seven or eight claws.
- the conductive portions of connection with the rings 103, 104 are embedded in the branches 102 and are stripped at the ring 101 for connection with the ends of the excitation winding.
- FIGS. 3 and 4 show that the end 13 comprises a cylindrical rear end section of reduced diameter relative to the other sections of the shaft 1.
- This end section is fluted as shown in Figures 3 and 4 for force fitting the connector on the shaft.
- This end 13 has diametrically grooves for the passage of the branches 102 of the reported manifold. One of these grooves is visible in Figures 3 and 4 without being referenced.
- the rear end 13 also comprises a third cylindrical section 132 for mounting the inner ring of the rear ball bearing 20 of smaller diameter than the bearing 19.
- This third section 132 is greater than that of the fourth end section and smaller than the diameter D3 of the second section 32.
- the grooves of the end 13 affect the third section 132 and in part a fifth cylindrical section 232 adjacent to the intermediate section for supporting and fixing the pole wheels.
- This fifth section 232 is smaller than that of the third section 132 and greater than that of the fourth section. This fifth section 232 makes it possible to implant the ring of the collector between the pole wheel 8 and the bearing 20.
- the second section 32 has a fluted portion at the front and the internal bore of the metal pulley 12 is also splined for its press fit on the grooved portion of the second section.
- the shape of the rear end 13 depends on the shape of the collector.
- This rear end 13 is in another embodiment devoid of slip ring and collector, the alternator then being brushless and the excitation winding carried by the housing.
- At least one of the sections of the front and rear ends of the shaft may have a section other than circular.
- the shaft 3 has between its front and rear ends an intermediate portion for fixing and supporting the wheels 7, 8.
- This intermediate section is modified, especially in thickness, to have a better accuracy and a better concentricity of the wheel assembly. poles 7, 8 of the claw rotor with the shaft 3.
- this intermediate portion of the shaft 3 has, on the one hand, two knurled zones, called crimping zones, intended to be assembled with the claw rotor by local deformation of material of this claw rotor, and on the other hand, a centering area.
- the crimping zones are disposed on either side of the centering zone and the centering zone is radially projecting with respect to the crimping zones.
- the crimping zones are also projecting radially with respect to the section 32 of larger radial size of the front end of the shaft
- the centering zone is dedicated to centering the pole wheels of the claw rotor, while the crimping zones are each dedicated to the attachment of the pole wheel concerned claw rotor.
- FIGS. 3 and 4 show at 54 the centering zone and at 61 and 62 grooves, respectively front and rear, which connect the front and rear axial ends of the centering zone 54 to the crimping zones respectively front and rear described. below.
- Each crimping zone is thus separated from the centering zone by a separation means, such as a groove, to preserve the centering zone and to disengage the tool for forming the knurled zones.
- the depth of the separation means depends on the depth of the knurled areas of the crimping zones.
- the separation grooves 61, 62 are of circular section. Of course it depends on the applications, the section of the grooves may be other than circular.
- each crimping zone is intended to cooperate locally with one of the pole wheels.
- the centering zone 54 is here smooth.
- the centering area is completely smooth.
- the centering zone is divided into at least two smooth centering portions separated from one another by a groove.
- the centering zone comprises at each of its axial ends and centrally a smooth centering portion separated axially from each other by two grooves, each groove being located between the smooth central portion and one smooth end portions.
- This zone 54 is in these cylindrical embodiment of circular section.
- the crimping zones are also of circular section.
- the outer diameter D1 of the centering zone 54 is greater than the outer diameter D2 of the crimping zones so that the centering zone 54 is radially projecting with respect to the crimping zones.
- This zone 54 has an axial length L1 greater than that of each crimping zone, these zones being also of cylindrical shape.
- the crimping zones in the aforementioned manner and according to a characteristic, extend in radial projection with respect to the radially larger section 32 of the front end of the shaft 3.
- the diameter D1 of the centering zone 54 is larger than the largest diameter D3 of the front end 32, 31 of the shaft 3 and thus also that of the end rear 13 of the shaft 3.
- the diameter D2 is also greater than the diameter D3.
- the second section 32 which has the diameter D3 greater than that of the first threaded section 31.
- the shaft of FIGS. 3 and 4 has an intermediate portion radially larger than the front end of the shaft 3 so that it is more robust than the shaft of DE 30 08 454.
- the machining of the crimping zones is easier to achieve since the diameter D2 of the crimping zones is greater than the diameter D3, corresponding here to the diameter of the second section 32.
- This second section 32 for mounting the bearing 19 is formed when the shaft is mounted in the pole wheels because the diameters D1 and D2 are greater than the diameter D3.
- the centering zone 54 also protects the crimping zones.
- the crimping zones before 150, 250, adjacent to the front end 31, 32 of the shaft 3, have here axially a length different from that of the rear crimping zones 156, 256.
- the rear crimping zone 156 of axial length L4, comprises a crimping groove 55 delimited axially on the one hand by a flange 57 for connection to the fifth section 232 of the rear end 13. of the shaft 3 and on the other hand, by a knurled zone 56 of diameter D2 connected, via the separation groove 62, to the rear axial end of the centering zone 54.
- the ridges of the knurled zone 56, made at the outer periphery of the shaft 3, are axially oriented and parallel to the axis XX of the shaft 3.
- the axial length L3 of this zone 56 is less than the length axial L4 of the zone 156 because of the presence of the groove 55.
- the diameter of the bottom of the groove 55 is greater than the diameter of the fourth section 232 so that the rigidity and mechanical strength of the rear end of the shaft is not changed.
- the crimping zone before 150 has axially a length L2 greater than the length L4 of the zone 156 and less than the length L1 of the zone 54.
- This crimping zone 150 is connected to the front end of the centering zone 54 by through the separation groove 61.
- This front zone 150 is a knurled zone of diameter D2, whose grooves, made at the outer periphery of the shaft 3, are axially oriented and parallel to the axis XX of the shaft 3.
- the zone 150 is split into two parts 50, 52 separated from each other by a crimping groove 51.
- the axial length of the portion 50 is greater than the axial length L3 of the knurled zone 56 it is itself greater than the axial length of the part 52.
- This knurled portion 52 is force-fitted into the internal bore of the spacer 159 of FIG. 1. The spacer 159 is thus locked in rotation by this knurled part. 52, which penetrates partially into this one as in Figure
- the crimping grooves 51, 55 are deeper than the separation grooves 61, 62, so that the bottom diameter of the grooves 61, 62 is greater than that of the bottom of the crimping grooves as can be seen in FIGS. , 4, 9, 9A, 9B, 9C.
- the depth of the crimping grooves 55, 51 is greater than the depth of the ridges of the knurled zone 156, 150.
- the shaft 3 also has a knurled portion 152 with an axially oriented groove for performing the same rotational locking function of the spacer 159.
- the material of the pole wheels 7, 8 is intended to penetrate by creep material, following a crimping operation described below and visible in FIGS. 9, 9A, 9B, radially in the crimping grooves respectively 51, 55 to fill them and partly axially and radially respectively in the knurled portion 50 and in the knurled area 56.
- each pole wheel is locked axially by the grooves 51, 55 and rotated by the knurled portion 50 of the zone 150 and by the knurled zone 56 of the zone 156. This secures the shaft with the pole wheels thanks to the crimping zones 150, 156.
- crimping groove and the crimping zones consist of a knurled rear crimping zone 256, of the same axial length L4 as the zone 156, and a knurled zone. crimping before 250 here of axial length L5 less than the length L4. The centering zone 54 and the grooves 62, 61 are unchanged.
- the axial length of the assembly formed by the zone 250, the knurled portion 152 mentioned above and the groove 151 connecting the zone 250 to the portion 152 is equal to the length L2 of the zone 150 of FIG. .
- the throat 151 is shorter axially than the throat
- the knurled crimping zones 256, 250 are crossed striations.
- the ridges, made at the outer periphery of the shaft 3, are inclined in one direction and the opposite direction so that these grooves intersect.
- Knurled areas 256, 250 are easier to perform than areas 156, 150 of Figure 3 and therefore less expensive.
- the material of the pole wheels 7, 8 penetrates into these crossed ridges so that axial and rotational locking of the pole wheels 7, 8 on the shaft 3 is obtained in a simple manner without crimping groove.
- the penetration of the material of the pole wheels 7, 8 in the crossed streaks is easier.
- zone 156 can be replaced by zone 256 of FIG. 4.
- collar 57 and groove 55 can be retained.
- the difference between the diameters D1 and D2 varies according to the applications. It is advantageously low to reduce crimping efforts with the tools described below. This value is for example between 0.1 and 1 mm.
- the internal bore of the pole wheels and in advance the outer diameter of the pole wheels, that is to say the outer periphery of the teeth, are machined beforehand in order to have a good concentricity between the pole wheels and the pole. shaft and obtain the desired air gap between the rotor and the stator of the machine.
- the diameter of this mill is not limited since at this stage the pole wheels are not yet assembled together. It is the same with the depth of the grooves.
- the grooves can be open or not open.
- the cutter can be lubricated.
- the lubrication of the tools makes it possible to increase the service life of these tools.
- the shaft 3 is inserted into the central inner bores of the pole wheels.
- the angular positioning of one wheel relative to the other is also carried out in particular by means of fingers temporarily interposed between the protrusions of the claws of the polar wheel concerned and during the compaction or pressing operation.
- the magnets are mounted in a groove opening or non-emerging of one of the teeth of a pole wheel, then the other polar wheel, which magnetism will take the right position.
- the mounting of the shaft in the bore of the pole wheels will not destroy this positioning because it is the centering zone 54, which is fitted into this bore. It is the same when there are no magnets, the angular positioning is not destroyed.
- the zone 54 also makes it possible to protect the bearing mounting sections 32 and 132. These sections are not damaged when we put the shaft 3, at its front end, into the central bore of the pole wheels.
- the transverse flange of the front polar wheel 76 is seen at 76, the inner and cylindrical central bore of the front polar wheel 7, and at 74 the half core of this wheel 7 having an outer face 71 facing the bearing.
- rear 16 of Figure 1 and an inner face 72 constituted by the free end of the half core 74.
- the half cores 74, 84 are located at the inner periphery of the flanges 73, 83 of the pole wheels ⁇ Q
- the faces 71 and 81 respectively constitute the front end face and the rear back face of the rotor 2 and are of transverse orientation relative to the axis XX of the shaft 3.
- the faces 71, 81 thus constitute the end faces axial rotor 2.
- the faces 72 and 82 are also of transverse orientation with respect to the axis XX and are intended to abut one against the other as visible in this FIG. 5 to ensure, in the aforementioned manner, the passage of the magnetic flux.
- the internal bore of the pole wheels 7, 8, here cylindrical, has a shape complementary to that of the centering zone 54.
- the outer periphery of the centering zone is in intimate contact with the edge of the bores 82, 76, that is to say with the inner periphery of the pole wheels, while the knurled zone 56 and the knurled portions 50, 52 do not interfere during this step with the edges of these bores 86, 76 because the diameter D1 of the centering zone 54 is greater than the diameter D2 of this knurled zone 56 and these knurled portions 50, 52.
- FIG. 5 it is shown in the lower part of the grooves 91 that it is also optionally possible to carry out the outer periphery of the teeth in order to reduce the eddy currents.
- These grooves 91 are in an embodiment of helical shape.
- the flange 57 has a diameter slightly greater than that of the knurled zone 56 so that this flange comes into contact with the pole wheel 8 which limits the relative movement of the shaft relative to the wheels and good position it axially. It is the same with the shaft of FIG. 10.
- the flange 57 is therefore a simple positioning flange and not stress recovery. so that it is thin. Its diameter is close to that of the diameter D1 being slightly greater than it to be able to bear on the outer face 81 of the wheel 8.
- This flange 57 is implanted axially between the collector 100 and the crimping zone 156 as can be seen in FIG. 5. To do this, the face 81 has a clearance, unreferenced, centrally, as can also be seen in FIG. 8.
- the local deformations of the claw rotor are generated by means of a crimping tool.
- the wheels 7, 8 each locally have an imprint, respectively 75, 85, annular shape.
- impressions are intended to receive the crimping tool 185, which is moved axially by being subjected to a pressure force to perform the crimping operation.
- 9A, 9B is the crimping tool itself that creates the footprints.
- the imprints 75, 85 are therefore crimping impressions.
- This tool has a tubular shape.
- the tool has a clearance 190 to not interfere with the branches 102 of the manifold 100, more precisely with the curved connecting sections of the branches to the ring 101.
- the crimping tool does not need such clearance.
- the tubular tool 185 comprises at the front an annular free end 187 shaped leading edge to penetrate into the imprint 75, 85 concerned or to form this imprint.
- This front end has internally a face 186 of frustoconical shape and externally an outer face 188 also of frustoconical shape connected to the inner face 186 by a rounded end 189 as best seen in Figure 9A.
- the face 186 is divergent at the front towards the outside of the tool, that is to say flared, while the face 188 is inclined in the opposite direction and converges forward towards the center of the tool.
- the recesses 75, 85 of complementary shape to that of the tool 185, each comprise, as best seen in FIG. 9B, a lower edge 286, connected by a rounded portion 289 to an upper edge 288.
- the edges 286 , 288 have a shape complementary to that of the faces 186, 188 connected by them via a rounded end 289 that has the free end of the tool 185.
- the edge 286, of frustoconical shape is inclined towards the XX axis and is convergent towards this axis outside the rotor 2, while the edge 288 is divergent outside the rotor.
- the tool 185 is moved axially by being subjected to a pressure force and makes the material flow, here of the rear polar wheel 8, axially and radially towards the interior considering the inclination of the face 186 and the edge 286, and with a plastic deformation of the material.
- FIG. 9B shows the final result, the radially fluent material in the groove 55 and radially and axially inwards in the knurled area 56 so that a rotational locking is obtained via the knurled zone 56, and in translation, via the groove 55. It is the same for the crimping zone before 150, the material of the pole wheel 7, under the action of the axial displacement of the crimping tool engaged in the impression 85, fluent radially internally in the groove 51 and radially and axially internally in the knurled zone 50 so that rotation locking is obtained via the knurled bead 50 and in translation via the groove 51.
- the free end 187 of the tool is made with the aid of a diameter change delimited by a transverse shoulder 184 ( Figure 9A).
- This end 187 is of reduced thickness relative to the main portion 183 of the inside diameter tool greater than that of the collar 57.
- the rear face of this tool is subjected to the action of a pressing element to locally deform , through its free end 187, the polar wheel concerned.
- FIG. 9A when it is the tool that creates the impression, in fact two annular sectors of creep of the material of the axial end 81 of the polar wheel 8 are obtained because of the clearance 190 of the tool for the collector arms.
- the tool 185 is devoid of such clearance so that a continuous ring of material creep is obtained.
- the fingerprints can therefore be divided into two annular sectors.
- the free end 187 can be split into a plurality of annular sectors.
- the angle c (FIG. 9A) of the face 186 is comprised in this embodiment between 20 ° and 45 °, advantageously between 30 ° and 38 °.
- the angle of the tapered face 188 is weak. This angle is for example between 1 ° and 5 °
- the crimping impressions 75, 85 are located inside the central hole of the fan concerned so that they are not modified.
- impressions 75, 85 are close to the inner periphery of the pole wheels 7, 8. They are located radially above the crimping zones being close to it.
- the present invention also retains the configuration of the pole wheels, only the cylindrical inner bore thereof is changed.
- the collector 100, the spacer 159 and the front and rear portions of the shaft are also retained.
- This rear end may have radially a size greater than or equal to that of the front end.
- the radial size of the intermediate portion is greater than that of the front portion.
- alternator can be brushless as described for example in the document FR 2,744,575, to which reference will be made.
- the rear bearing has a deep shape and the claw rotor is constituted by a stepped main polar wheel and a cantilevered pole wheel, which are fixed together by a ring of non-magnetic material. This ring connects the nested teeth of the two polar wheels.
- the core is fixed and is fixed on the rear face of the front bearing forming a cover for the rear bearing.
- One of the pole wheels is devoid of a flange, while the other main pole wheel is assembled with the shaft according to the invention, the crimping areas being each located at an axial end of the main pole wheel.
- the alternator constitutes the excitation alternator of an electromagnetic retarder.
- the axial length of the crimping zones is less than the thickness of the flanges 73, 83 of the pole wheels.
- the axial length of the crimping zones is less than the thickness of the flanges 73, 83 of the pole wheels.
- crimping zones are axially longer than those of DE 300 84 54.
- an intermediate core may be implanted between the two pole wheels, being separate therefrom.
- Figure 5 can be shortened axially half cores 74, 84 and place between them a separate intermediate core.
- This core will be centered, as well as the polar wheels, by the centering zone.
- This centering zone is not necessarily smooth. As a variant, it has, for example, protruding points or contact zones, for example formed in the groove for contact with the edge of the bores.
- the radial size of the internal bore corresponds to that of the centering zone to have an intimate centering contact. An adjustment is obtained between the shaft and the main pole wheel or the pole wheels Thus, in FIGS. 3 to 6, the internal diameter of the bore 76, 86 of the half-cores 74, 84 is adjusted to the diameter D1 of the centering zone 54.
- the mechanical strength of the shaft according to the invention is greater than the mechanical strength of the shaft of DE 300 84 54 because in the present invention the diameter D 2 of the crimping zones is smaller than the diameter D 1 of the zone of centering and is greater than the largest diameter D3 of the front end 31, 32 of the shaft 3, while in the document DE 300 84 54 the largest diameter of the front end of the shaft is greater than the diameter D2 crimping areas.
- the largest diameter of the smooth part of the shaft is constant so that the mounting regions of the bearings may be damaged during mounting of the pole wheels on the shaft.
- the machining of the crimping zones is easier and more economical than that of the crimping zones of document DE 300 84 54.
- a crimping zone in the form of a knurled area with crossed ridges is of a reduced cost and allows a better axial holding of the assembly of the pole wheels with the shaft because of the fact that a good penetration of the material of the polar wheel concerned in the streaks.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Synchronous Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
- Catching Or Destruction (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL07823823T PL2067238T3 (pl) | 2006-09-13 | 2007-09-13 | Wał wirnika zębatego, wirnik zębaty wyposażony w taki wał i obrotowa maszyna elektryczna wyposażona w taki wirnik |
EP07823823A EP2067238B1 (fr) | 2006-09-13 | 2007-09-13 | Arbre de rotor a griffes, rotor a griffes equipe d'un tel arbre et machine electrique tournante equipee d'un tel rotor |
BRPI0716669A BRPI0716669B1 (pt) | 2006-09-13 | 2007-09-13 | árvore de rotor com estrias, rotor com estrias, e, máquina elétrica giratória |
ES07823823T ES2373247T3 (es) | 2006-09-13 | 2007-09-13 | Árbol de rotor con garras, rotor con garras equipado con un árbol de este tipo y máquina eléctrica giratoria equipada con un rotor de este tipo. |
US12/441,096 US8008834B2 (en) | 2006-09-13 | 2007-09-13 | Toothed-rotor shaft, toothed rotor equipped with such a shaft and rotary electrical machine equipped with such a rotor |
AT07823823T ATE523943T1 (de) | 2006-09-13 | 2007-09-13 | Mit zähnen ausgestattete rotorwelle, mit einer solchen welle ausgestatteter rotor mit zähnen und mit einem solchen rotor ausgestattete elektrische drehmaschine |
CN2007800340957A CN101517862B (zh) | 2006-09-13 | 2007-09-13 | 爪形极转子轴、配备有这种轴的爪形极转子和配备有这种转子的旋转电机 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0653720 | 2006-09-13 | ||
FR0653720A FR2905806B1 (fr) | 2006-09-13 | 2006-09-13 | Arbre de rotor a griffes, rotor a griffes equipe d'un tel arbre et machine electrique tournante equipee d'un tel rotor |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2008031995A2 true WO2008031995A2 (fr) | 2008-03-20 |
WO2008031995A3 WO2008031995A3 (fr) | 2008-05-02 |
Family
ID=37968699
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2007/051927 WO2008031995A2 (fr) | 2006-09-13 | 2007-09-13 | Arbre de rotor a griffes, rotor a griffes equipe d'un tel arbre et machine electrique tournante equipee d'un tel rotor |
Country Status (9)
Country | Link |
---|---|
US (1) | US8008834B2 (fr) |
EP (1) | EP2067238B1 (fr) |
CN (1) | CN101517862B (fr) |
AT (1) | ATE523943T1 (fr) |
BR (1) | BRPI0716669B1 (fr) |
ES (1) | ES2373247T3 (fr) |
FR (1) | FR2905806B1 (fr) |
PL (1) | PL2067238T3 (fr) |
WO (1) | WO2008031995A2 (fr) |
Cited By (3)
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WO2011058254A1 (fr) | 2009-11-13 | 2011-05-19 | Valeo Equipements Electriques Moteur | Rotor a griffes equipe d'un isolant d'un bobinage d'excitation et d'aimants et machine electrique tournante equipee d'un tel rotor |
WO2014199074A1 (fr) | 2013-06-14 | 2014-12-18 | Valeo Equipements Electriques Moteur | Rotor de machine electrique tournante equipe d'un isolant d'un bobinage d'excitation comprenant au moins un petale modifie pour le passage d'un aimant lors du montage |
US9960651B2 (en) | 2012-12-17 | 2018-05-01 | Valeo Equipements Electriques Moteur | Claw rotor provided with an excitation winding insulator, and rotary electrical machine equipped with the claw rotor |
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FR2905806B1 (fr) * | 2006-09-13 | 2008-12-26 | Valeo Equip Electr Moteur | Arbre de rotor a griffes, rotor a griffes equipe d'un tel arbre et machine electrique tournante equipee d'un tel rotor |
FR2950753B1 (fr) | 2009-09-30 | 2012-12-07 | Valeo Equip Electr Moteur | Agencement de redressement de courant pour machine electrique tournante, notamment alternateur pour vehicule automobile, et machine electrique tournante comportant un tel agencement |
FR2950752B1 (fr) | 2009-09-30 | 2016-06-03 | Valeo Equip Electr Moteur | Machine electrique tournante polyphasee a capot de protection, notamment alternateur pour vehicule automobile |
FR2951884B1 (fr) | 2009-10-26 | 2013-01-18 | Valeo Equip Electr Moteur | Module de redressement de courant pour machine electrique tournante et machine electrique tournante comportant un tel module |
US8217550B2 (en) * | 2009-12-03 | 2012-07-10 | Unipoint Electric Mfg. Co. Ltd. | Alternator and method of manufacturing a rotor core thereof |
FR2954017B1 (fr) | 2009-12-11 | 2016-01-01 | Valeo Equip Electr Moteur | Agencement de redressement de courant dote d'au moins deux modules pour machine electrique tournante et machine electrique tournante comportant un tel agencement |
FR2954016B1 (fr) | 2009-12-11 | 2017-05-05 | Valeo Equip Electr Moteur | Module de redressement de courant pour machine electrique tournante et machine electrique tournante comportant un tel module |
DE102011080889A1 (de) * | 2011-08-12 | 2013-02-14 | Robert Bosch Gmbh | Elektrische Maschine sowie Verfahren zur Montage einer elektrischen Maschine |
DE102011085880A1 (de) * | 2011-11-08 | 2013-05-08 | Robert Bosch Gmbh | Elektrische Maschine sowie Verfahren zur Herstellung einer elektrischen Maschine |
ES2437447B1 (es) * | 2012-07-06 | 2015-01-05 | José BELLO COUSELO | Motor magnético |
CN103023177A (zh) * | 2013-01-06 | 2013-04-03 | 宁波韵升汽车电机系统有限公司 | 发电机转子及其制造方法 |
JP6405788B2 (ja) * | 2014-08-20 | 2018-10-17 | 株式会社デンソー | 回転電機の回転子 |
EP3218484A4 (fr) | 2014-11-14 | 2018-05-30 | Voyager Therapeutics, Inc. | Compositions et méthodes de traitement de la sclérose latérale amyotrophique (sla) |
FR3032746B1 (fr) | 2015-02-16 | 2018-08-03 | Valeo Equipements Electriques Moteur | Machine electrique tournante dotee d'une poulie de reception d'une courroie et d'un dispositif de reglage de la tension de la courroie |
FR3040835B1 (fr) | 2015-09-03 | 2017-08-25 | Valeo Equip Electr Moteur | Machine electrique tournante comportant un arbre a diametres etages et procede d'assemblage d'une telle machine |
CN106787288A (zh) * | 2017-01-09 | 2017-05-31 | 叶伟强 | 一种应用于五轴加工设备中的专用电机 |
JP6844282B2 (ja) * | 2017-01-30 | 2021-03-17 | 株式会社富士通ゼネラル | 電動機 |
US11211843B2 (en) * | 2017-08-16 | 2021-12-28 | Sew-Eurodrive Gmbh & Co. Kg | Electric motor including a rotor |
EP4124658A3 (fr) | 2017-10-16 | 2023-04-19 | Voyager Therapeutics, Inc. | Traitement de la sclérose latérale amyotrophique (sla) |
CN108880041A (zh) * | 2018-08-26 | 2018-11-23 | 深圳市领航致远科技有限公司 | 一种电动平衡车的轮毂电机和电动平衡车 |
GB2583538B (en) * | 2019-05-03 | 2024-02-28 | Polar Tech Management Group Limited | Connector arrangement |
DE102020132468A1 (de) | 2020-12-07 | 2022-06-09 | Schaeffler Technologies AG & Co. KG | Axiale Fixierung einer Wellenkomponente einer elektrischen Maschine |
WO2022253622A1 (fr) * | 2021-05-31 | 2022-12-08 | Valeo Eautomotive Germany Gmbh | Rotor pour une machine électrique |
JPWO2022264313A1 (fr) * | 2021-06-16 | 2022-12-22 |
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EP0866541A2 (fr) * | 1997-03-17 | 1998-09-23 | Ford Motor Company | Maintien d'arbre d'un rotor d'une machine électrique |
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FR2905806B1 (fr) * | 2006-09-13 | 2008-12-26 | Valeo Equip Electr Moteur | Arbre de rotor a griffes, rotor a griffes equipe d'un tel arbre et machine electrique tournante equipee d'un tel rotor |
-
2006
- 2006-09-13 FR FR0653720A patent/FR2905806B1/fr not_active Expired - Fee Related
-
2007
- 2007-09-13 ES ES07823823T patent/ES2373247T3/es active Active
- 2007-09-13 CN CN2007800340957A patent/CN101517862B/zh active Active
- 2007-09-13 EP EP07823823A patent/EP2067238B1/fr active Active
- 2007-09-13 BR BRPI0716669A patent/BRPI0716669B1/pt active IP Right Grant
- 2007-09-13 PL PL07823823T patent/PL2067238T3/pl unknown
- 2007-09-13 AT AT07823823T patent/ATE523943T1/de not_active IP Right Cessation
- 2007-09-13 WO PCT/FR2007/051927 patent/WO2008031995A2/fr active Application Filing
- 2007-09-13 US US12/441,096 patent/US8008834B2/en active Active
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DE3008454A1 (de) * | 1979-03-05 | 1980-09-11 | Hitachi Ltd | Laeufer fuer umlaufende maschinen und herstellungsverfahren dafuer |
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EP0866541A2 (fr) * | 1997-03-17 | 1998-09-23 | Ford Motor Company | Maintien d'arbre d'un rotor d'une machine électrique |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011058254A1 (fr) | 2009-11-13 | 2011-05-19 | Valeo Equipements Electriques Moteur | Rotor a griffes equipe d'un isolant d'un bobinage d'excitation et d'aimants et machine electrique tournante equipee d'un tel rotor |
US9960651B2 (en) | 2012-12-17 | 2018-05-01 | Valeo Equipements Electriques Moteur | Claw rotor provided with an excitation winding insulator, and rotary electrical machine equipped with the claw rotor |
WO2014199074A1 (fr) | 2013-06-14 | 2014-12-18 | Valeo Equipements Electriques Moteur | Rotor de machine electrique tournante equipe d'un isolant d'un bobinage d'excitation comprenant au moins un petale modifie pour le passage d'un aimant lors du montage |
US10075033B2 (en) | 2013-06-14 | 2018-09-11 | Valeo Equipments Electriques Moteur | Rotor of rotary electrical machine equipped with excitation winding insulator comprising at least one petal modified for passage of magnet during assembly |
Also Published As
Publication number | Publication date |
---|---|
FR2905806A1 (fr) | 2008-03-14 |
PL2067238T3 (pl) | 2012-01-31 |
EP2067238A2 (fr) | 2009-06-10 |
US20100013351A1 (en) | 2010-01-21 |
BRPI0716669B1 (pt) | 2018-09-25 |
BRPI0716669A2 (pt) | 2013-09-17 |
EP2067238B1 (fr) | 2011-09-07 |
WO2008031995A3 (fr) | 2008-05-02 |
US8008834B2 (en) | 2011-08-30 |
FR2905806B1 (fr) | 2008-12-26 |
CN101517862A (zh) | 2009-08-26 |
CN101517862B (zh) | 2012-07-18 |
ATE523943T1 (de) | 2011-09-15 |
ES2373247T3 (es) | 2012-02-01 |
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