WO2013093255A2 - Salient pole rotor comprising flanges for holding the lead-out wires of windings, and associated holding flanges - Google Patents

Salient pole rotor comprising flanges for holding the lead-out wires of windings, and associated holding flanges Download PDF

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Publication number
WO2013093255A2
WO2013093255A2 PCT/FR2012/052590 FR2012052590W WO2013093255A2 WO 2013093255 A2 WO2013093255 A2 WO 2013093255A2 FR 2012052590 W FR2012052590 W FR 2012052590W WO 2013093255 A2 WO2013093255 A2 WO 2013093255A2
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WO
WIPO (PCT)
Prior art keywords
rotor
orifices
flange
series
radial
Prior art date
Application number
PCT/FR2012/052590
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French (fr)
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WO2013093255A3 (en
Inventor
Michel Fakes
Original Assignee
Valeo Equipements Electriques Moteur
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Filing date
Publication date
Priority to FR1162024 priority Critical
Priority to FR1162024A priority patent/FR2984630B1/en
Application filed by Valeo Equipements Electriques Moteur filed Critical Valeo Equipements Electriques Moteur
Publication of WO2013093255A2 publication Critical patent/WO2013093255A2/en
Publication of WO2013093255A3 publication Critical patent/WO2013093255A3/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K3/00Details of windings
    • H02K3/46Fastening of windings on the stator or rotor structure
    • H02K3/50Fastening of winding heads, equalising connectors, or connections thereto
    • H02K3/51Fastening of winding heads, equalising connectors, or connections thereto applicable to rotors only
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K9/00Arrangements for cooling or ventilating
    • H02K9/02Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft

Abstract

The invention essentially relates to a rotary electric machine rotor (30), comprising flanges (55, 56) for holding the lamination stack (36) and the lead-out wires of the windings axially arranged on both sides of the lamination stack (36) comprising at least eight salient poles having inter-winding spaces formed between the consecutive windings that are each wound around a salient pole. The invention is characterized in that each holding flange (55, 56) comprises a radial wall (59) having a main opening (60) that enables the shaft (35) to pass therethrough, an annular rim (75) extending over the entire outer periphery of the radial wall (59) and axially extending in the direction of the rotor, said annular rim (75) having one surface that bears on the outer radial end surfaces of the lamination stack (36), and at least one series of through-openings (72) provided in the radial wall (59) that ensure air flow inside the rotor and between both salient poles. The total surface area of the series of through-openings (72, 73) is greater than 0.3 times the total surface area of the inter-winding spaces.

Description

ROTOR POLE WITH HIGHLIGHTS OF HOLDING PLATES OF WINDING AND PLATES OF buns

ASSOCIATED HOLDING

[01] TECHNICAL FIELD OF THE INVENTION

[02] The invention relates to a rotor with salient poles comprising holding plates the winding of coil ends and the associated holding flanges.

[03] The invention finds a particularly advantageous application in the field of rotating electrical machines such as alternators, starter-alternators and electromagnetic retarders.

[04] State of the Art

[05] WO 2003/019748 relates to a system and a retaining method of the terminal convolution of the cable on a generator rotor designed for high speed applications such as aeronautical applications. This rotor comprises a shaft, fins, carriers and cable winder spools and at least one cover. The vanes extend radially outwardly from the shaft and each support is placed on a corresponding fin. Each winding is installed around the support and of the corresponding fin. Each cover comes to mate with a corresponding end of the vane so as to prevent radial displacement of the windings outwardly during rotation of the rotor. Each carrier is coupled with the corresponding hood and comprises on its radially inner edge a flange projecting in a direction opposite to the respective vane. The flange and the cover allow the lash adjuster of the winding of the corresponding cable. Figure 8 of WO 2003/019748, one can see a cover provided with holes unreferenced. By comparing Figures 2 and 8 of this document, it appears that these unreferenced holes are located in front of the salient poles 120a, 120b, 120c and 120d. [06] The document DE 198 35 044 describes cover caps of a rotor which consist of hollow cylindrical parts with flange portions at one end perpendicular to the axis of the rotor. Caches may be attached to an end plate. These caches are, for example plastics material to cover the end face of the iron lamination packet of the rotor. The hollow cylindrical portions are designed to be of a truncated conical shape.

[07] WO 2007/003835 shows a salient pole rotor for a rotating electrical machine in particular an alternator or an alternator-starter for a motor vehicle.

[08] It is recalled that a starter-alternator is a rotating electric machine capable of working in a reversible manner on the one hand, as an electric generator as a function generator and on the other hand, as electric motor in particular for starting the combustion engine the motor vehicle.

[09] This machine essentially comprises a casing and, inside thereof, a rotor fixed in rotation to a central shaft of the rotor and an annular stator surrounding the rotor coaxially to the shaft.

[010] The stator comprises a body in the form of a stack of laminations provided with notches, for example semi-closed type, for installation of a stator winding having a plurality of windings. This stator winding comprises for example a set of three-phase windings in star or delta, whose outputs are connected to a bridge rectifier comprising rectifier elements. [011] Generally speaking, the alternator is of the polyphase type and the one or more bridge rectifiers possible in particular to rectify the alternating current produced in the stator windings into direct current to charge the battery including the motor vehicle and supply the fillers and electrical consumers on board the motor vehicle system. [012] The casing is in at least two parts, namely a front bearing and a rear bearing. The bearings are hollow and each carry centrally a ball bearing respectively for the rotational mounting of the rotor shaft. [013] The casing comprises an intermediate part carrying internally the body of the stator. This intermediate portion is interposed axially between the bearings each provided with a plurality of openings for internal ventilation of the machine through at least one fan integral with one of the axial ends of the rotor. This fan has integral blades of a flange as described below.

[014] The rotor shaft carries at its front end a pulley which is arranged outside the housing. The pulley is part of a movement transmission device via at least one belt between the alternator and the heat engine of the motor vehicle. [015] A laminated core is mounted coaxially on the rotor shaft in the housing, inside the stator. This stack of laminations is formed of an axial stack of metal sheets which extend in a radial plane perpendicular to the axis of the rotor shaft. This laminations here comprises a cylindrical central core and a circumferential distribution of radially projecting arms from the core.

[016] In a radial plane, the laminations of the laminated core all have an identical contour. The contour of the sheets is cut generally circular shape and having salient poles, which are uniformly distributed and protruding in a radial direction of the shaft toward the outer periphery. The laminated core has at least two poles.

[017] Each pole is constituted by an arm which, starting from the core, extends radially toward the outer periphery direction of the stator. The free end of the pole terminates in a circumferentially projecting on both back and side of the arm. An annular gap between the free end of the poles and the inner periphery of the stator body. [018] The projecting function of return of each pole is to retain in the radial direction an electrically conductive exciter coil which is wound around the radial arm of each pole, to against the centrifugal force experienced by the excitation coil upon rotation of the rotor. [019] The excitation of each pole windings are electrically interconnected by connecting son, for example in series. The excitation windings are powered electrically by a collector, which includes slip rings, which are arranged around a rear end of the shaft. This collector is for example made by molding electrically insulating material on electrically conductive members connecting the rings to a ring electrically connected by wire connections or the ends of the excitation windings of the rotor.

[020] The slip rings are electrically powered via brushes belonging to a brush holder and which are arranged so as to rub on the slip rings. The brush holder is generally arranged in the housing and is electrically connected to a voltage regulator.

[021] Each excitation winding is wound around the radially oriented arms each pole so that axial end portions of the excitation coil protrude axially with respect to each radial side of outer axial end of the packet plates. These projecting portions are subsequently called "buns". Each pole thus comprises an excitation winding which itself comprises two opposite coil ends. [022] A first front flange and a second back flange are coaxially mounted so as to grip axially the laminated core shaft to maintain the sheets stacked package. Each flange has overall the shape of a disk extending in a radial plane perpendicular to the axis of the shaft. Each flange comprises a central opening for coaxial mounting on the shaft.

[023] The plates are arranged axially on either side of the pack of sheets so that the internal radial faces of the flanges are pressed against the outer axial end faces of the radial laminations. Each flange has four holes intended to allow the passage of four bolts. The arms of the laminations have holes so that the ties can pass through the laminated core axially from the forward flange to the rear flange. The flanges are in heat conductive material, for example metal.

[024] The outer peripheral edge of the flanges vis-à-vis the stator comprises axial grooves which open out in the radially inner and outer faces of the flanges. These grooves make it possible to renew the air which lies radially between the stator and the rotor. Each flange also has recesses which are formed in their inner radial face. These units are for receiving the protruding coil ends. At least one housing of at least one flange comprises a contact surface with the radially outer face of the associated bun. So when the buns are heated, their heat is transmitted to the plates in particular by conduction.

[025] To prevent the excitation coil is damaged and to prevent short-circuits in the excitation coil, the coil end is in contact with the bottom of the housing via a heat-conductive substance and does not conduct electricity, which protects the son of the excitation coil. The substance is here a thermally conductive impregnating varnish and electrical insulator. This varnish hardens by polymerization.

[026] One of the flanges includes filling openings which each open into the bottom of an associated housing. These filling openings are intended to enable the impregnation of the liquid varnish around the excitation winding associated with said housing, and more particularly around the two coil ends of the excitation coil.

[027] The outer radial face of each flange has blades forming a fan. Each blade extends axially outward from the outer radial face of the flange member. When the rotor rotates, the blades thus allow to evacuate the heat stored in particular in the flanges and the rotor by air circulation inside the machine through openings that have the bearings.

[028] However, such a configuration of the machine and in particular the flanges, the flow of air inside the rotor is not optimal when the number of poles increases. When the rotor has a high number of poles, the rotor tends to heat up quickly. In addition, to facilitate the removal of heat, such a known configuration of the electric machine necessarily required to implement a varnish impregnation operation which is long and costly to produce. [029] OBJECT OF THE INVENTION

[030] The invention in particular aims to provide an improved rotor salient poles allowing improved cooling without having to necessarily carry out a varnish impregnation step between the windings and the laminations. [031] To this end, the invention relates to a rotor of a rotary electric machine comprising:

- a rotor shaft adapted to be rotatably mounted about its axis,

- a lamination stack mounted coaxially on the rotor shaft, the laminations comprising at least eight salient poles radially,

- a wound excitation coil around each pole, so that axial end portions of the coil, so-called "coil ends" protrude axially with respect to each face of outer radial end of the laminated core,

- holding plates of the laminated core and the coil ends of the coils arranged axially on either side of the laminated core, characterized in that:

- a interbobinage space between two successive excitation windings, - each retaining annulus comprises:

- a radial wall provided with a primary opening allowing passage of the shaft, - an annular flange extending over the entire outer periphery of the radial wall and extending axially towards the rotor lamination stack, the flange having an annular support face on the radially outer end faces of the laminations to keep in place the coil ends in spite of the centrifugal force caused by rotation of the rotor acting on said coil ends,

- at least one series of through-holes formed in the radial wall ensuring a circulation of air within the rotor between two salient poles

- the total area of ​​the series of orifices therethrough is greater than 0,

3 times the total area of ​​interbobinage spaces.

[032] Thanks to the invention more heat is removed by convection through the series of through-holes while having a larger number of poles. In addition the flanges make it possible to remove heat by conduction and convection.

[033] In one embodiment, each flange includes a first series of through orifices situated around the main opening, these openings having an opening angle at least equal to the angle between two successive salient poles. [034] According to one embodiment the orifices of the first series of orifices are wider circumferentially than radially high.

[035] In one embodiment, each flange includes a second series of through orifices located outside of the first series.

[036] According to one embodiment the size of the first series of holes and / or the second series of holes is different from one flange to the other.

[037] According to one embodiment the holes through the series of orifices are higher than wide radially circumferentially.

[038] According to one embodiment said highest orifices radially circumferentially wide that are globally vis-à-vis at least a portion of a space interbobinage. [039] According to an embodiment the radial height of some of the orifices generally in vis-à-vis at least a portion of a interbobinage space is generally equal to the radial height of the space interbobinage.

[040] According to an embodiment the radial height of some of the orifices generally in vis-à-vis at least a portion of a interbobinage space is less than the radial height of the space interbobinage.

[041] According to one embodiment the circumferential width of some of the orifices in a generally vis-à-vis at least a portion of a interbobinage space is generally equal to the circumferential width of a space interbobinage.

[042] According to one embodiment the circumferential width of some of the orifices in a generally vis-à-vis at least a portion of a interbobinage space is greater than the circumferential width of a space interbobinage. [043] According to one embodiment the circumferential width of some of the orifices in a generally vis-à-vis at least a portion of a interbobinage space is less than the circumferential width of a space interbobinage.

[044] According to one embodiment each flange has a series of orifices radially higher than broad circumferentially and the second series of orifices.

[045] According to one embodiment at least one flange carries blades positioned on a first side of the wall facing the outside of the rotor. [046] According to one embodiment the blades belong to a separate fan reported fastener on the flange for example by spot welding, screwing or riveting.

[047] In one embodiment the blades belong to the flange being of one piece with it. [048] In one embodiment, each flange includes a second series of orifices, each orifice of the second set being positioned between two successive blades.

[049] In one embodiment, the rotor further comprises two insulating elements positioned on either side of the laminated core, providing insulation of coil ends.

[050] In one embodiment,

- the radial wall of each flange has on its inner side facing the rotor at least an area extending axially towards the stack of laminations, - each insulating element has at least a recessed portion within which is inserted the sector one of the flanges.

[051] In one embodiment, each insulating element comprises:

- arms kept pressed against a radial end face of a salient pole by a bun, and

- caps located at one end of the arm extending circumferentially to either side of the arm, these caps being positioned between the head of the coil and the annular rim of a flange so as to participate in the restraint of the coil ends.

[052] In one embodiment, each flange comprises at least a centering pin designed to cooperate with the axial openings in the salient poles.

[053] In one embodiment, each flange comprises at least two orifices, the orifices of the flanges and the axial openings of the poles ensuring the passage of tie-rods for assembling the flanges around the laminations.

[054] In one embodiment, the rotor comprises at least one magnet positioned between two adjacent salient poles.

[055] In one embodiment, the flanges are made of nonmagnetic material such as aluminum or of plastic material preferably fiber-reinforced. [056] The invention further relates to a set of holding plates of a laminated core and windings of coil ends arranged axially on either side of the stack of laminations of a rotor for a rotary electrical machine comprising at least eight interbobinage salient poles with spaces forming between two successive windings each wound about a salient pole, characterized in that each retaining annulus comprises:

- a radial wall provided with a primary opening allowing passage of the shaft,

- the blades positioned on a first face of the radial wall facing outwardly of the rotor,

- an annular rim extending over the entire outer periphery of the radial wall and extending axially toward the rotor, annular flange having a support face on the radially outer end faces of the laminated core in order to maintain instead the coil ends in spite of the centrifugal force caused by rotation of the rotor acting on said coil ends,

- at least one series of through-holes formed in the radial wall ensuring a circulation of air inside the rotor between the two salient poles

- the total area of ​​the series of orifices being greater than 0.3 times the total area of ​​interbobinage spaces.

[057] BRIEF DESCRIPTION OF FIGURES

[058] The invention will be better understood from reading the following description and examining the accompanying figures. These figures are given for illustration but in no way limit the invention. They show :

[059] Figure 1: an axial sectional view of a rotating electrical machine provided with a rotor according to the invention;

[060] Figure 2: an exploded perspective view of a rotor according to the invention which is not wound;

[061] Figures 3a and 3b are views in perspective of a rotor wound according to the invention without the flanges or the resolver; [062] Figures 4a and 4b are views from above and below respectively of a rotor according to the invention without the flanges or the resolver;

[063] Figures 5a-5b are perspective views of a rotor wound according to the invention provided with its retaining flanges; [064] Figure 6a-6b are views respectively from above and below a rotor according to the invention provided with its holding plates have a first and a second series of orifices;

[065] Figure 7: a sectional view of a rotor according to the invention having an opening variant for fixing it to the shaft. [066] Figure 8 is a view of one of the flanges with a lower number of second orifices.

[067] Figure 9 is a partial view of one of the flanges with a series of orifices located vis-à-vis a space interbobinage.

[068] The elements identical, similar or analogous retain the same reference from one figure to another.

[069] On EMBODIMENTS DESCRIPTION OF THE INVENTION

[070] The invention relates to a rotor 30 with salient poles for up to 10 rotating electrical machine in particular an alternator or an alternator-starter. This machine 10 is preferably intended to be implemented in a motor vehicle.

[071] Recall that a starter-alternator is a rotating electric machine capable of working in a reversible manner on the one hand, as an electric generator as a function generator and on the other hand, as electric motor in particular for starting the combustion engine the motor vehicle. Such an alternator starter is described for example in WO-A-01/69762 which should be referred for further details.

[072] This machine essentially comprises a casing 1 1 and, inside thereof, a rotor 30 integral in rotation with a central shaft 35 of rotor 12 and a stator ring surrounding the rotor 30 coaxially the shaft 35 of axis B also constituting the axis of the rotor 30.

[073] The stator 12 comprises a shaped body of a bundle of laminations provided with notches, for example semi-closed type, for installation of a stator winding 13 having a plurality of windings. This stator winding 13 comprises for example a set of three-phase windings in star or delta, whose outputs are connected to a rectifier bridge (not shown) including rectifying elements having rectifying elements such as diodes or transistors of the type MOSFET, in particular when the machine 10 is of the reversible type and consists of an alternator-starter as described for example in document FR-a-2745445 (US-a-6,002,219).

[074] The windings of the stator winding 13 are obtained with the aid of a continuous wire, electrically conductive, coated with an insulating layer and mounted in the slots concerned of the stator body 12.

[075] According to a variant not shown, for a better filling of the notches of the stator body 12, the windings 13 are made using rod-shaped conductors, such as pins, connected together for example by welding. [076] According to another variant not shown, to reduce the ripple factor and magnetic noise, the stator winding 13 includes two three-phase windings to form a composite device windings of stator 12, the windings being offset thirty electrical degrees as described for example in US-A1 -2002/0175589, EP-0454039 and FR-A-2784248. In this case there are two rectifier bridges and all combinations of three-phase windings in a star and / or delta are possible.

[077] Generally speaking, the alternator is of the polyphase type and the rectifier bridge allows include rectifying the alternating current produced in the stator windings 12 into direct current especially to charge the battery (not shown) of the motor vehicle and supplying the loads and the electrical consumers on board the motor vehicle system.

[078] As illustrated in Figure 1, the shaft 35 of the rotor 30 is mounted rotatably about its axis B of axial orientation in the stator 12 of the machine 10.

[079] The casing 1 1 is in at least two parts, namely a front bearing 14 and rear bearing 15. Bearings 14, 15 are hollow and each carry centrally a ball bearing respectively 16 and 17 to the shaft 35 for rotational mounting of the rotor 30. [080] The housing 1 1 has an intermediate portion (not referenced) carrying internally the body of the stator. This intermediate portion is interposed axially between the bearings 14, 15 each provided with a plurality of openings one of which (not referenced)) is visible in Figure 1 for internal ventilation of the machine by means of a fan described in more detail below.

[081] The shaft 35 of rotor 30 carries at its front end a pulley 18 which is arranged outside of the housing 1 1. The pulley 18 belongs to a motion transmission device via at least one belt (not shown) between the alternator and the heat engine of the motor vehicle.

[082] Figure 2 shows the rotor 30 having the shaft 35, a packet 36 of sheets mounted coaxially on the shaft 35, this pack 36 of sheets having at least eight poles 44 projecting radially. Alternatively the rotor may include a ten-pole or 12-pole as shown in FIGS. 4a and 4b. The poles can be circumferentially distributed evenly. The rotor 30 further comprises a winding 50 excitation (cf. Figures 3a-3b) wound around each pole 44 so that portions 51 of axial end of the winding 50, so-called "coil ends" protruding axially each face 40, 41 of outer radial end of the package 36 of sheets. The flanges 55, 56 for holding the pack 36 plates and the coil ends 51 of the coils 50 are arranged axially on either side of the package 36 of sheets. [083] More specifically, the package sheet 36 is coaxially mounted on the shaft 35 of rotor 30 in the casing 1 1 inside the stator 12. The package 36 of sheets is mounted to rotate with the shaft 35. to this end, the package 36 of sheets 37 comprises a central axial orifice which is force-fitted on a knurled portion of the shaft 35. Alternatively, the core package 36 of sheets has an opening 38 provided with recesses evenly distributed circumferentially around the opening 38 intended to cooperate with correspondingly shaped tongues belonging to the shaft 35 (see Figure 7). In an exemplary embodiment, these recesses have in plan view a circular shape.

[084] The package sheet 36 is formed by an axial stack of metal sheets which extend in a radial plane perpendicular to the axis B of the shaft 35. The package 36 of sheets form the rotor body 30 and is ferromagnetic material. This package 36 of sheets here comprises a cylindrical central core and poles 44 projecting radially from the core. These poles 44 are in one embodiment in one piece with the soul. Alternatively the poles 44 are attached to the core, for example by a connection of the mortice and tenon type as described in document FR 2 856 532. One pole 44 of two or all of the poles 44 are attached to the core so to facilitate assembly and disassembly of the pole 44. Alternatively, a back 45 projecting from one pole 44 of two or return 45 projecting all-pole 44 is reported with respect to a corresponding arm 39.

[085] In the following description, the radial faces point towards the center of the package 36 of sheets will be referred to as inner faces, while the radial faces oriented in an opposite direction will be referred to as outer faces. It is also contemplated that the rear side of the rotor 30 is located resolver 100 side while the front side is on the opposite side.

[086] Thus, the package 36 of sheets is delimited axially by the first 40 outer radial front end face and the second face opposite outer radial 41 rear end.

[087] In a radial plane, the laminations of the pack 36 of sheets all have an identical contour. The contour of the sheets is cut generally circular shape and includes the salient poles 44, which are uniformly distributed and protruding in a radial direction of the shaft 35 toward the outer periphery, as shown in Figures 4a-4b. The package 36 of sheets comprises at least eight poles and 44 in the example shown in Figures, it comprises twelve poles 44. [088] Each pole 44, as best seen in Figure 7, consists of an arm 39 and a back 45 projecting. The arm 39 extends radially from the core toward the outer periphery direction of the stator 12. The free end of the pole 44 terminates in the return 45 projecting circumferentially on either side of the arm 39. An annular air gap exists between the free end of the poles 44 and the inner periphery of the stator body 12.

[089] The return of the function 45 projecting from each pole 44 is to retain in the radial direction of a coil 50 of electrically conductive excitation which is wound around the radial arm 39 of each pole 44 as described below, to against the centrifugal force experienced by the coil 50 excitation during rotation of the rotor 30.

[090] The windings 50 of excitation of each pole 44 are electrically interconnected by connecting son, for example in series alternatively in parallel. The son of connection and windings 50 may be the son of copper covered with enamel. These windings 50 excitation are electrically fed by a manifold 101, which includes slip rings 102, which are arranged around a rear end of the shaft 35. The manifold 101 is for example made by molding electrically insulating material on electrically conductive elements (not shown) connecting the rings 102 to a ring (not referenced) electrically connected by wire connections at the ends of the windings 50 or excitation of the rotor 30.

[091] The slip rings 102 are electrically powered via brushes (not shown) which belong to a brush holder and which are arranged so as to rub on the slip ring 102. The brush holder is usually arranged in the casing 1 1 and is electrically connected to a voltage regulator (cf. Figure 1). [092] Advantageously, for increasing the power of the electrical machine, the rotor 30 further comprises referenced magnets 105 of the following Figures 4a-4b a number equal to the number of poles (in this case twelve). Magnets 105 extend axially adjacent the outer periphery of the rotor 30. As the magnets 105 are arranged evenly around the shaft 35 alternately with the pin 44. To this end, each magnet 105 is positioned between two poles 44 adjacent projections, the free ends of two protruding poles 44 formed by the return 45, being provided with notches now the magnet 105 fixed manner between the two poles. A same slot may contain one or a plurality of magnets 105, for example two magnets 105 including a rare earth and ferrite.

[093] The rotor 30 has at least eight poles 44 distributed in pairs of diametrically opposite poles. In Figures 4a-4b there is provided a circumferential alternation of twelve poles 44 and twelve magnets 105. The number of poles 44 and the number of magnet 105 are variable according to the application. We can provide an embodiment without magnets 105. In another embodiment the number of magnets 105 is less than the number of poles as shown in Figure 7. These provisions increase the power of the machine will . For simplicity, are not limited, it is assumed in the following there are provided twelve poles diametrically opposite 44, twelve coils 50 and twelve magnets 105. The poles 44 and the magnets 105 are distributed here circumferentially regularly. [094] More specifically in the figures, the magnets 105 are mounted between the salient Returns 45 of two salient poles 44, the said returned material 45 having notches in the form of grooves with a U-shaped profile, as described for example in document FR 2 784 248. the mounting of the magnets in at least one groove may be carried out using a blade and interposition of an adhesive is more flexible than the magnet. Alternatively the magnets are mounted in the grooves with the aid of springs. [095] In general a small clearance, called air gap, between the outer periphery of the poles 44 and the inner periphery of the stator body 12.

[096] The rotor 30 further comprises a device 80 for electrical insulation of the coils 50 relative to the laminations 36. This device 80 comprises two members 81, 82 insulators. The first element 81 insulation, said element 81 before, is positioned against the 40 radial outer face of the pack 36 of sheets, while the second element 82 insulator, said 82 back member is positioned against the face 41 radial outer package 36 of sheets. These elements 81, 82 insulating ensure electrical insulation of the coil ends 51 of the coils 50. The device 80 insulation windings further comprises insulating notch 83 providing electrical insulation of the axial portions of the windings 50.

[097] More specifically, each element 81, 82 comprises an insulator 85 central radial wall provided with an opening 86 allowing the passage of main shaft 35. Each element 81, 82 comprises arms 88 extending radially from the outer edge of the radial wall 85 outwardly of each member 81, 82. each of these arms 88 has at its free end a cap 89 circumferentially extending on either side of the arm 88. the cap 89 s' also extends axially in the direction opposite to the lamination stack 36 and to the inner periphery 45 returns.

[098] The arms 88 of the elements 81, 82 are preferably insulated on their outer face, the grooves providing radial retention of the turns of the coils 50. The grooves of the arms 88 of the element 81 before insulation are inclined in order to facilitate rank change during the winding operation of winding a conductive wire around different poles for the coils 50.

[099] The guide pins 95 are positioned on an outer face of the radial wall 85 of the element 82. These pins 95 which have lateral faces on which the son and bear it possible to guide the son during operation winding poles 44. These pins 95 also allow steadying son windings 50 in a fixed position upon completion of winding operation. These guide pins 95 are distributed over the external face of the radial wall 85 in a manner adapted to the configuration desired winding.

[0100] Each radial wall 85 further comprises two recessed portions 91 for receiving internal sectors 79 of one of the flanges 55, 56 for holding. For element 82 back insulation, recessed portions 91 are diametrically opposed. Of course, the number and shape of the recessed portions 91, in particular the angle of opening and the annular gap between two recessed portions 91, may be adapted depending on the number and shape of the corresponding sectors 79. For the insulation member 81 before, the recessed portions 91 and the main opening 86 are interconnected, the inner walls defining the orifice being intended to be supported locally on the outer circumference of the shaft 35.

[0101] The insulating member 82 includes a rear annular flange 96 defining the opening 86 main. This annular flange 96 extends axially from the outer face of the insulating member 82 outwardly from the rotor 30. When the rotor 30 is mounted, the flange 96 is located between the colleteur 101 and a shoulder of the shaft 35 the rotor 30.

[0102] The elements 81, 82 each comprise two insulating devices 98 snap (clipping) for cooperating by latching (clipping) with corresponding openings on each side radial end of the core of the package 36 of sheets (see Figures 5a-5b, 6a-6b).

[0103] The insulating slot 83 takes the form of a thin membrane, made of an electrically insulating material and conductor of heat, for example a type aramid material said Nomex (registered trademark), this thin membrane is folded so each insulating slot 83 is pressed against the axial inner wall of the package 36 of sheets between two adjacent poles 44. For this purpose, the insulator 83 notch has five parts 1 10-1 14, each part 1 10-1 14 being bent with respect to an adjacent portion in a substantially parallel bending segment to the axis B of rotor 30 . a first part 1 10 located towards the center of the rotor 30 is pressed against a part of the outer circumference of the core located between two adjacent poles 44. Two portions 1 1 1, 1 12 facing one another are pressed against two faces facing each other of the poles 39 of arm 44. Two parts 1 13: 1 14 are pressed against two portions of two returns 45 adjacent protruding. The number of inserts 83 notch depends on the number of poles 44, which is equal. Here, the number of inserts 83 notch is twelve.

[0104] Each winding 50 excitation comprises turns wound around the arm 39 of radial orientation of each pole 44 covered with insulators 83 and notch 88 of the two arms of the elements 81, 82 insulating each located at one end of this pole 44 so that the coil ends 51 of the winding 50 excitation protrude axially with respect to each face 40, 41 of outer radial end of the package 36 of sheets, as shown in Figures 3a-3b. More particularly, the radially outer face of each bun 51 is offset axially outwards relative to the face 40, 41 associated radially outer package 36 of sheets. Each pole 44 and comprises a winding 50 excitation which itself comprises two coil ends 51 opposite. As shown in Figures 4a, 4b, a space 200 exists between two adjacent coils 50. This space will be called 200 later interbobinage space. Each space 200 is bounded at its outer periphery by magnets 105 implanted between two successive returns 45 and at its inner periphery by the outer edge of the central wall 85. Each radial space is bounded laterally by two successive coils 50. The radial height this space 200 is greater than its circumferential width. Each space 200 thus has a surface S, which also takes into account the thickness of the caps 89. When there is no magnet this space is delimited by the virtual extension of the outer periphery of the caps 89. Each space 200 defines a passage extending through the lamination stack 36. it will be noted that the width of the coil ends 51 and windings 50 in this mode of embodiment by decreasing layer from the outer periphery to the outer periphery of the bun 51 and the windings 50.

[0105] According to this winding 50, each bun 51 is in abutment against the axial face of the cap 89 facing the bun 51. The cap 89 is held stationary relative to the pole 44 through the arm 88 associated plated between a radial face of the pole 44 and the son of the windings. The cap 89 in combination with the rim 75 of the flange makes it possible to retain the coil ends 51 in spite of the centrifugal force caused by rotation of the rotor 30 acting on said coil ends 51.

[0106] The first flange 55 for holding the package sheet 36, said flange 55 and the front second flange 56 for holding the package sheet 36, said rear plate 56, are mounted coaxially to the shaft 35 so as to clamp axially the elements 81, 82 and the insulation package 36 of sheets. These flanges 55, 56 are non-magnetic material being advantageously made of metal to exhaust heat. [0107] Each flange 55, 56 includes a radial wall 59 extending in a radial plane perpendicular to the axis B of the shaft 35. This radial wall 59 is provided with a main opening 60 allowing the passage of the shaft 35. the rear flange 56 has two diametrically opposed recesses 61 opening toward the opening 60. These recesses 61 of substantially square shape viewed from above each allow passage of a tab (one is referenced 198 in Figure 4a) of the manifold 101 of the type described in document FR 2710197 to which reference is made. In this figure 4a the lugs 198 are not yet folded to clamp the ends of the son of the coils 50. It will be noted that four of the pins 95 internal ends are offset radially with respect to the other pegs 95 for mounting in parallel the windings 50 . more precisely two inner end pieces 95 are disposed on either side of each tab 198. in this figure, for clarity cut the ends of the connecting son between the windings 50 to better show the legs 198. these ends are wrapped around the inner pins 95 and intended to be fixed by crimping in the tabs 198. the pins 95 have a rectangular sectional shape with corners chamfered not to hurt the connecting son portions between two consecutive coils 50. As shown in this figure 4a the other pins 95 are generally located on the same circumference and the ends of each coil 50 are in contact with the lateral edges of two consecutive pieces concerned for a continuous connection to the windings 50. The lower longitudinal edges of the 95 guide pins radially retain the wire between two consecutive windings. The assembly and has a good performance despite the action of centrifugal force. Of course when the windings 50 are connected in series two lower pieces 95 suffice.

[0108] It will be appreciated that the above solution to pins 95 ensures continuity between the various coils 50, which are all at the same potential. The windings may be carried out using a centrally hollow needle for passing the wire and moves circumferentially, axially and radially. This latch needle to pass from one peg 95 to another. Of course alternatively it can remove internal counters and directly fix the ends of the legs 198 son on.

[0109] The radial wall 59 of each flange 55, 56 has an annular flange 75 extending over the entire outer periphery of the radial wall 59 and extending axially towards the center of the rotor 30. This annular flange 75 has a support face on the radially outer end faces of the poles 44 so that the caps 89 of the elements 81, 82 insulators are sandwiched between an inner annular face of the flange 75 and the coil ends 51. Such a configuration allows the flanges 55, 56 to participate with the caps 89 to maintain the coil ends 51 in spite of the centrifugal force caused by rotation of the rotor 30. Alternatively, it would also be possible to use only the annular rim 75 of the flanges 55, 56 for holding the coil ends 51 in position. In this case the elements 51, 52 therefore have no insulating caps 89.

[0110] The outer face of the wall 59 of each flange 55, 56 includes integrally forming the blades 70 a fan. Each blade 70 extends axially outwardly of the rotor 30 from the outer radial face of the flange 55, 56 associated. Advantageously for better heat dissipation, the blades 70 are formed integrally with the flange 55, 56 associated. Preferably, the blades 70 are arranged at the periphery of the outer radial face of the flange 55, 56 asymmetrically with respect to the axis B of the shaft 35 to increase the ventilation performance and reduce noise when the rotor 30 turned.

[0111] Alternatively, the blades 70 belong to a separate fan of the flange 55, 56. The use of flanges 55, 56 and separate fans allows easy adaption of the fans depending on the power of the machine 10 targeted. The flange 55, 56 and the fan are then secured together by means of a fastening device formed for example by the fastening elements associated with flanges 55, 56 cooperating with the orifices of the fan. This fixation may be carried out using screw as in Figure 16 of document US 6,784,586, alternatively by riveting or spot welding.

[0112] Each flange 55, 56 further comprises a first series of through-holes 72 to ensure flow of air within the rotor between two salient poles 44. These orifices 72 are located around the opening 60 main and have an opening angle at least equal to the angle between two successive poles 44 protruding. They are wider circumferentially and radially less high. Here, this first series of holes 72 has four holes 72 having the same opening angle. Thus the openings 72 are facing at least the base (the inner periphery) of a space 200 between two successive windings 50 to provide a flow of air inside the rotor between the two salient poles 44 concerned. Of course, this depends on the application. The four holes 72 of flange 55 before are regularly arranged around the opening 60 main. Note that the holes 72 do not have the same size of a flange to the other and it is made an axial an air flow between the windings 50.

[0113] The orifices 72 of the plate 55 are wider circumferentially than radially of the flange 55. The holes 72 are in vis-à-vis the base of two spaces 200, while the orifices of the flange 55 are vis- in relation to the base 200 by a single space and a portion of the base of a further space 200.

[0114] Each flange 55, 56 further comprises a second series of holes 73 therethrough for providing a flow inside the rotor. Each orifice 73 of the second series is positioned between two successive blades 70. It is possible to provide such openings 73 in all areas between two successive blades 70 or only in some of these areas according to the desired ventilation circuit. These orifices 73 have an angle of opening smaller than the opening angle of the orifices 72 of the first series of orifices 72. Here, the second series of orifices 73 comprise fourteen holes 73 of unequal size. This second series 72 provides access to at least a portion of a space 200 at the outer periphery of this space.

[0115] As seen in FIGS openings 73 are located radially outside the holes 72, that is to say on a mean circumference greater than the first holes, and that, on the one hand, in the vicinity the outer periphery of at least one space 200 and on the other hand, in the free areas between the two blades 70 arranged asymmetrically to reduce noise. There is thus achieved an asymmetry between the two flanges 55, 56 to an axial flow of air undisturbed by the presence of the magnets 105 implanted on the outer periphery of the laminated core 36 between two returns 45 located outside the slots. [0116] The invention takes advantage of the presence of spaces 200 and thus through the axial passages 50 between two coils opposite to implement the orifices 72, 73.

[0117] According to one feature the total area of ​​the first 72 and the second series of holes 73 is greater than 0.3 times the total area of ​​spaces interbobinage 200 to properly cool the rotor 30 and obtain a good portion of air while having a large number of poles 44.

[0118] Of course, the openings 72, 73 can be symmetrical or asymmetrical with a flange 55 to the other 56. All application dependent.

[0119] Alternatively there is provided additional counterbores in the image counterbores 68 described below. These counterbores affect the radially outer periphery of the radial wall 59 axially and a portion of the flange 75. These countersinks may be implanted at the free spaces between two returns 45. Of course one can remove the orifices 73 and replace them by facings. Everything depends on the application. The second series of holes 73 may not have the same size of a flange to the other. [0120] When the rotor 30 rotates, the blades 70 and the two sets of orifices 72, 73 and the counterbores and allow to evacuate the stored heat in particular by circulation of air inside the machine 10. Next the ventilation system, the air coming from outside the rotor 30 will enter the interior of rotor 30 via the orifices 72, 73 of a flange 55, 56 to then flow along the rotor 30 to the within the spaces 200 between two successive poles 44 and then out the opposite side via the orifices 72, 73 of the flange 55, 56 opposite. The flanges 55, 56 are blades 70 via their internal fans, bearings 14, 15 having in known manner the inlet openings and air outlet. The number of orifices 72, 73, and counterbores their dimensions, the number of blades 70 and their arrangement can be adapted according to the desired ventilation circuit while maintaining the mechanical strength of the flanges 55, 56.

[0121] The radial wall 59 of each flange 55, 56 further has on its inner side facing the package 36 of two inner sectors sheets 79 extending axially towards the package 36 of sheets. Each sector 79 is inserted into a recessed portion 91 of a radial wall 85 of an element 81, 82 insulation. In one example, these sectors 79 are formed by two diametrically opposite portions of the same ring. Sectors are axial stops for the soul of the laminations 36.

[0122] The annular flange 75 of each flange 55, 56 includes two pins 77 for centering adapted to cooperate with axial openings 66 formed in the salient poles 44. The pins 77 thus make it possible to facilitate the angular positioning of the flanges 55, 56 during assembly. [0123] In one embodiment the flanges 55, 56 of non-magnetic material are made of mouldable material such as aluminum to well dissipate the heat or plastic alternatively advantageously reinforced with fibers.

[0124] The flanges 55, 56 are secured to each other by tie rods 62 of axial orientation, which here are three in number. For this purpose each flange 55, 56 includes three holes 65 for allowing the passage of each tie rod 62. The tie rods 62 extend axially through the axial openings 66 formed in the pole, the package 36 of sheets from the flange 55 before until the rear flange 56. These rods 62 are non-magnetic material, such as aluminum or stainless steel.

[0125] The outer radial face of each flange 55, 56 includes counterbores 68 for accommodating the ends of each tie rod 62. These countersinks 68 allow a passage of air

[0126] According to a not represented variant of the invention, the flanges have other cooling means such as at least one heat pipe installed at the level of a return heat pipe 45. This may be implemented in favor of an orifice 65 free. The shaft may be a shaft shaped to form a heat pipe.

[0127] According to another aspect the orifices 65 for fastening the flange 55 are tapped before. The tie rods 62 have a threaded end which is screwed into the threaded holes of the flange 55 before during assembly of the rotor 30. Alternatively the threaded end of the tie rod 62 is self-tapping so that the orifice 65 associated with the flange 55 is smooth. Alternatively, the end of the tie rod 62 is smooth and passes through the orifice 65 associated with the flange 55, the free end of the tie 62 being crushed in contact with the outer face of the flange 55 for fixing by riveting. Alternatively, the tie 62 is replaced by a rod passing through the holes 65 of the flanges 55, 56 and package 36 of sheets, the axial ends of the rod being crushed in contact with the outer faces of the flanges 55, 56 for fixing by riveting .

[0128] The rotor 30 comprises a resolver 100 that shows how the rotor rotational position 30. The resolver 100 takes place in particular when the machine 10 is operating in motor mode (starter function), to properly adjust the voltage applied to the windings 50 the stator 12 depending on the position of the rotor 30. in one example, the resolver 100 is replaced by a magnetic target associated with a set of Hall effect sensors carried by a holder sensor.

[0129] More specifically, the rear flange 56 is configured to carry a target holder which is for allowing the associated sensor detecting the angular position of the rotor 30. The sensors are carried by a carrier sensor whose position is adjustable circumferentially. Reading the target here is radial. The target carrier with its target and the sensors integral with a door sensor belong to means for monitoring the rotation of the rotor as described in WO01 / 69762 to which reference is made for details [0130] are described below after mounting of the rotor 30. the insulating slot 83 are each installed between two successive poles 44. Then, the elements 81, 82 are fixed on the insulating pack 36 plate snap (clipping) via the two devices 98. Each front outer radial end of each pole 44 is then in direct contact with an arm 88 of a element 81, 82 insulation.

[0131] The windings 50 of excitation are then wound around each pole 44 covered with insulators 83 and notch 88 of the two arms of the elements 81, 82 insulation associated with the pole 44, the son of the windings 50 are guided and maintained by the grooves of the arms 88 and 95 by the guide pins of the elements 81, 82 insulators.

[0132] The package 36 of sheets, the elements 81, 82 and insulating the windings 50 associated drive are mounted on the shaft 35 of rotor 30, for example by force fitting. Then the flanges 55, 56 are arranged axially on either side of the package 36 of sheets so that the pins 77 enter centering apertures 66 formed in the axial salient poles 44 and the segments 79 are positioned in the within the recessed portions 91 of the walls 85 of elements 81, 82 insulators. The collector 101 is positioned on the shaft 35, between the second flange 56 and the second insulating member 82. [0133] The flanges 75 annular flanges 55, 56 then have a support face on the radially outer end faces of the poles 44 so that the caps 89 of the elements 81, 82 insulators are sandwiched between an inner annular face the rim 75 and the coil ends 51. Such a configuration allows the flanges 55, 56 to participate with the caps 89 to maintain the coil ends 51 in spite of the centrifugal force caused by rotation of the rotor 30. [0134] The threaded rod of the tie rods 62 is then inserted axially into the apertures 65 of attachment of the flange 55 before. The tie rods 62 are then screwed into the holes 65 of the mounting mounting plate 56 backward until the head of each tie rod 62 is resting the associated counterbore 68 of the bottom plate 55 forward. Thus the tie rods 62 used to grip axially the package sheet 36 and the elements 81, 82 insulation between the two flanges 55, 56.

[0135] Then a balancing operation of flanges 55, 56 is performed. This includes for example, in the drilling of holes or recesses in the periphery of the outer face of the radial wall 59 of each flange 55, 56 so that the rotor 30 does not vibrate when it is rotated. Thanks to the invention the balancing operation is facilitated by the flanges 55, 56 to reduce the number of fasteners. [0136] The resolver 101 is positioned around the shaft 35, on the outer face of the radial wall 59 of the second flange 56.

[0137] In operation of such a rotor 30, windings 50 excitation tend to heat up in view of the current passing through them. [0138] The flanges 55, 56 rotate with the shaft 35 of the rotor 30. The blades 70 and brew air and air flows between the two flanges 55, 56 along the interbobinage spaces between two adjacent poles through the two sets of orifices 72, 73 of each flange 55, 56. the blades 70 and the orifices 72, 73 and dissipated in the air the heat accumulated inside the rotor 30. the heat is discharged efficiently into the surrounding air through the blades 70 and orifices 72, 73. the surrounding air is renewed through the mixing and turbulence induced by the blades 70.

[0139] As is evident from the description and drawings packets of sheets of the stator and the rotor possible to reduce the losses due to eddy currents. The recesses in the aperture 38 of Figure 7 are used to reduce the stresses during the press fitting of the knurled shaft in the central opening of the core of the laminated core 36. The pole 44 solution of integrally with the central web of the laminated core 36 is more advantageous than reported pole solution because this solution has a better resistance to centrifugal force and ensures a smaller air gap between the rotor outer periphery 30 and the inner periphery of the stator body. The patterns described above achievements possible to use the collectors 101 conventional alternators, for example of the type described in FR 2,710,197 and also conventional mounting the magnets of these generators.

[0140] It also is evident from the description and drawings that the flanges 55, 56, of hollow shape, have a rim 75 constituting a pressing member for holding the laminated core 36 and prevent distortion, including opening thereof. The lamination stack 36 is clamped between the flanges 55, 56. The flanges 75, configured to come into contact with the returns 45, stiffen the flanges 55, 56 and constitute via their inner circumference a radial stubborn to caps 89 of the elements 81 , 82. Thus, under the action of the centrifugal force the outer periphery of the caps 89 is allowed to cooperate with the inner periphery of the flanges 75 of the flanges 55, 56. These flanges 55, 56 are via their flange 75 a axial stop for the magnets 105 implanted between two consecutive returns 45. the hollow shape of the flanges can accommodate the coil ends 51, the elements 81, 82 with their caps 89 and a portion of manifold 101. It will be appreciated that the internal sectors 79 of the flanges prevent deformation of the core of package 36 in combination with the walls 85 of elements 81, 82. [0141] The elements 81, 82 are, in the aforementioned manner, an electrically insulating material. They can be made of plastic, such as PA 6.6. They are thicker and less good conductor of heat that the notch insulator 83.

[0142] Naturally, the present invention is not limited to the embodiments described.

[0143] Thus one can reduce the number of orifices 73 as shown in FIG 8, one of the openings 73 being adjacent to a recess 68. In this figure have been removed the openings 73 of small figures 6a and 6b, the relationship between the total area of ​​orifices 72, 73 greater than 0, three times that of the total area of ​​spaces 200 is always checked.

[0144] It is the same in the embodiment of Figure 9. In this figure there is provided a series of holes 172 in facing relation generally of at least a portion of an area 200. The apertures 172 thus are higher than wide radially circumferentially. Some of the orifices 172, of which only one is visible in Figure 9, have generally the same radial height radially and circumferentially the same width as the spaces 200. These orifices are located in part between two successive blades. Other holes 172 have generally the same circumferential width as the spaces 20 but are shorter radially than the spaces 200. These openings are located partly inside of the blades 70 and partly between the two blades 70. Implantation orifices 172 depends on the location of the blades 70. [0145] in the embodiment above the circumferential width of the openings 172 is generally equal to the circumferential width of the spaces 200. in the alternative openings 172 are narrower or wider circumferentially than 200 spaces.

[0146] In another embodiment the holes 172 are offset circumferentially with respect to the spaces 200. This is made possible thanks to the hollow shape of the flanges. Note that some of the orifices 73 are only vis-à-vis of a portion of a bun 51 and yet the air can reach the field 220 of the fact that the coil ends 51 are rounded and the flanges 55, 56 are hollow. [0147] Of course it can replace some of the orifices 172 through orifices of the second series 73 or add (as shown in dotted lines in Figure 9) of the orifices of the second series 73 installed externally of the series of orifices 172. it can reduce the circumferential width of the orifices 72 for implanting holes 172. [0148] of course it is possible to provide four tie rods 62 namely a hole by pulling 62. Alternatively there are provided two diametrically opposite rods 62 and two diametrically opposed heat pipes, each heat pipe having a rod engaged in at least one hole in one of the flanges 55, 56 and at least a portion of the packet holes 36 plates and opening to the outside of the flange 55, 56 concerned. These heat pipes may completely pass through the flanges 55, 56 and the package 36 of sheet metal and be configured outside of the flanges 55, 56 to form blades 70 of fan. Such heat pipes are described, for example in Figures 1 1A and 1B 1B of the document FR 2855673 to which reference is made. The provisions of 12, 13 and 24 of this document are also applicable.

[0149] The number of poles 44 depends aforementioned manner of applications. This number is equal to 12 in the figures. Alternatively it can be 8 or 10 or more than 12. With respect to WO 2007/00385 is increased in all cases the number of windings 50 while having the possibility of increasing the number of magnets to increase at will the power of the electric rotating machine with salient poles. Thus the number of magnets may be less than the number of poles 44.

[0150] Of course the magnets can be replaced by non-magnetic parts to have a continuity of material at the outer periphery of the rotor. It can perform many combinations. Thus all the spaces between the returns 45 will be free. Alternatively some of these spaces between the back 45 can be free and the other occupied by the magnet and / or magnetic parts. Alternatively the magnets may be of different shade. For example some of the spaces between two returns 45 will be occupied by ferrite magnets and at least part of the other areas may be occupied by rare earth magnets. [0151] Of course, alternatively one or more elements 81, 82 is free of grooves and the insulator 83 may be integral with one of the elements 81, 82, for example by molding. In yet another embodiment the insulation may be in two parts each integral with one of the elements 81, 82. The insulator 83 may be so alternatively PA 6.6 being thinner than elements 81, 82.

[0152] The presence of the pins 95 is not required, the coils being connectable to each other as in WO 2007/003835 supra. [0153] In a variant, the flanges 55, 56 are obtained by molding or forging or plastic or metal material injection.

[0154] In a variant, the blades 70 of at least one flange 55, 56 are removed. The two flanges are alternatively devoid of blades, particularly when the rotary electric machine is cooled by water. Specifically alternatively the intermediate portion of the housing 1 1 has a channel for circulation of a coolant, such as coolant of the engine and the stator body is mounted by shrinking within the intermediate portion. [0155] Of course when the two plates do not wear blades have more freedom to implement the second series of openings 73, which can thus be larger circumferentially to extend from either side of a coil .

[0156] In all cases at least one of the series of orifices 72, 73 and / or counterbores is different from a pool to another.

[0157] Of course alternatively the sets of orifices 72, 73 and / or counterbores are identical with a flange 55, 56 to another.

[0158] Alternatively the casing comprises a front bearing and a rear bearing as disclosed for example in Figure 14 of document US 6,784,586 in document showing a part of the brushes and the rectifier bridge.

[0159] The rotating electrical machine is an alternator variant devoid resolver or any other means of monitoring the rotation of the rotor.

[0160] The cooling of the rotor 30 is improved. Indeed, the invention increases the intrinsic air performance of the flanges 55, 56 and allows a better dissipation of heat in the rotor 30 by convection. In addition, ventilation type is reduced noise noise. This improved cooling of the rotor 30 keeps the windings 50 of the rotor 30 of the operating range 0 to 18000 rpm and increasing the number of poles 44 of the rotor 30. In addition, it reduces the cost and time manufacturing of the rotor 30 by minimizing varnish impregnation operation which is long and costly. Indeed one can deposit drops of varnish at the buns for a better cohesion of the turns of the windings 50, and a better resistance to centrifugal force. The son alternatively connecting and windings 50 may be covered by an additional bonding layer in the form of an impregnating polymer which by heating and polymerization allows bonding together the turns of the coils for better resistance to the centrifugal force.

[0161] The amount of coating is reduced in all cases. This varnish or the link layer provide cohesion windings. They are not used for heat transfer with the laminated core and the flanges 55, 56. [0162] Alternatively one of the flanges 55, 56 of non-magnetic material is plastic and the other aluminum, brass or magnesium base. The flange plastic material is advantageously made of plastic reinforced with fibers. The embodiment of the plate of plastic or aluminum makes it possible to easily obtain the blades molding. Can achieve the balancing of the plastic plate by addition of material in at least one axial projection of the flange as disclosed in DE 23 46 345 to which reference is made. Balancing at least one of the flanges is formed alternatively by crimping of at least one balancing mass in one of the recesses formed in the projections of the flange as disclosed in DE 30 31 622 which should be made for further details.

Claims

1. Rotor (30) of machine (10) rotating electric comprising:
- a shaft (35) of the rotor to be rotatably mounted about its axis (B), - a package (36) plates mounted coaxially on the shaft (35) of the rotor, this pack (36) of sheets comprising at least eight poles (44) protruding radially,
- a coil (50) wound around excitation of each pole (44) so ​​that portions (51) axial end of the winding, so-called "winding heads" project axially with respect to each outer radial end face package (36) of sheets,
- flanges (55, 56) for holding the package (36) plates and the coil ends (51) of the coils (50) arranged axially on either side of the package (36) of sheets, characterized in that:
- a interbobinage space (200) exists between two excitation windings (50) successive
- each flange (55, 56) for maintaining comprises:
- a wall (59) provided with a radial opening (60) allowing the passage of main shaft (35),
- a flange (75) ring extending over the entire outer periphery of the wall (59) radially and extending axially towards the rotor, said rim (75) having an annular face bearing on the radial end faces outer package (36) plates in order to maintain in place the coil ends (51) against the centrifugal force caused by rotation of the rotor acting on said coil ends (51),
- at least one series of orifices (72, 73-172) passing through in the wall (59) providing radial movement of air within the rotor between the two poles (44) protruding
- the total area of ​​the series of orifices therethrough (72, 73- 172) being greater than 0, three times the total area of ​​interbobinage spaces (200).
2. Rotor according to claim 1, characterized in that at least one of the flanges (55, 56) has fan blades (70) positioned on a first face of the radial wall (59) facing outwardly of the rotor (30), each flange (55, 56) comprises a first series of orifices (72, 172) therethrough located around the opening (60) main, said orifices of the first set of said at least of the flanges (55, 56) carrying blades breakdowns being located radially inwardly of said fan blades (70).
3. Rotor according to claim 2, characterized in that the openings (72) of the first series of orifices (72, 172) having an opening angle at least equal to the angle between two poles (44) successive projections being wider circumferentially than radially high.
4. Rotor according to claim 2 or 3, characterized in that each flange (55, 56) has a second series of orifices (73) passing through to the outside of the first series of orifices (72).
5. Rotor according to Claim 4, characterized in that the size of the first series of holes and / or the second series of orifices (73) is different from a flange (55, 56) to another.
6. Rotor according to claim 5, characterized in that the first series of orifices (72) of one of the flanges (55, 56) is circumferentially wider and higher radially than the first series of the other flange ( 55, 56).
7. Rotor according to Claim 2, characterized in that said orifices of the first series (172) are taller than wide radially circumferentially.
8. Rotor according to claim 7, characterized in that the orifices (172) of the series of orifices therethrough are generally in vis-à-vis at least a portion of a space (200) interbobinage.
9. Rotor according to Claim 8, characterized in that the radial height of some of the orifices (172) generally in vis-à-vis at least a portion of a space (200) interbobinage is generally equal to the radial height space (200) interbobinage.
10. Rotor according to Claim 8, characterized in that the radial height of some of the orifices (172) generally in vis-à-vis at least a portion of a space (200) interbobinage is less than the radial height of the space (200) interbobinage.
January 1. Rotor according to any one of claims 8 to 10, characterized in that the circumferential width of some of the orifices (172) generally in vis-à-vis at least a portion of a space (200) is equal to interbobinage the circumferential width of the space (200) interbobinage.
12. A rotor according to any of claims 8 to 10, characterized in that the circumferential width of some of the orifices (172) generally in vis-à-vis at least a portion of a space (200) is interbobinage different from the circumferential width of the space (200) interbobinage.
13. A rotor according to any of claims 7 to 12, characterized in that each flange has a series of orifices (172) passing radially higher than wide circumferentially and a second series a second series of orifices (73) passing through outside of said series of orifices (172).
14. A rotor according to any preceding claim, characterized in that each flange (55, 56) has counterbore (68) affecting the radially outer periphery of the radial wall (59) and axially partly the flange (75) .
15. Rotor according to Claim 2 taken in combination with Claim 4, characterized in that each orifice (73) of the second series is positioned between two blades (70) cut.
16. Rotor according to one of the preceding claims, characterized in that it further comprises two elements (81, 82) insulation positioned on both sides of the package (36) of sheets, providing insulation of coil ends ( 51).
17. Rotor according to Claim 16, characterized in that:
- the wall (59) of each radial flange (55, 56) has on its inner side facing the rotor at least one sector (79) extending axially towards the package (36) of sheets,
- each element (81, 82) insulating has at least one portion (91) recessed within which is inserted the sector (79) of one of the flanges (55, 56).
18. Rotor according to claim 16 or 17, characterized in that each member (81, 82) insulator comprises:
- a radial wall (85);
- the arms (88) extending outwardly from the outer edge of the radial wall (85) and kept pressed against a radial end face of a pole (44) projecting by a bun (51) and
- caps (89) located at one end of the arm (88) and circumferentially extending on either side of the arm (88), said caps (89) being positioned between the head of the winding (50) and the flange (75) a flange ring (55, 56) so as to participate in the restraint of the coil ends (51).
19. Rotor according to one of claims 1 to 18, characterized in that the flanges (55, 56) are made of nonmagnetic material such as aluminum or of plastic material preferably fiber-reinforced.
20. flange assembly (55, 56) for holding a package (36) of sheet metal and coil ends (51) of windings (50) arranged axially on either side of the package (36) of sheets of a rotor (30) for a rotary electrical machine comprising at least eight salient poles (44) with spaces forming (200) interbobinage between the windings (50) each successive wound around a salient pole (44), characterized in that each flange (55, 56) for maintaining comprises:
- a wall (59) provided with a radial opening (60) allowing the passage of main shaft (35),
- the blades (70) positioned on a first face of the radial wall (59) facing outwardly of the rotor (30),
- a flange (75) ring extending over the entire outer periphery of the wall (59) radially and extending axially towards the rotor (30), said flange (75) having an annular face bearing on the sides of external radial end of the package (36) plates in order to maintain in place the coil ends (51) against the centrifugal force caused by rotation of the rotor (30) acting on said coil ends (51),
- at least one series of orifices (72, 73- 172) passing through in the wall (59) providing radial movement of air within the rotor (30) between the two poles (44) protruding
- the total area of ​​the series of orifices therethrough (72, 73- 172) being greater than 0, three times the total area of ​​spaces (200) interbobinage.
21. The assembly of claim 20, wherein at least one of the flanges (55, 56) of said holder assembly of fan blades (70) positioned on a first face of the radial wall (59) facing outwardly of the rotor ( 30), each flange (55, 56) comprises a first series of orifices (72, 172) therethrough located around the opening (60) main, said orifices of the first set of said at least one of flanges (55, 56) blade-carrying breakdowns being located radially inwardly of said fan blades (70).
PCT/FR2012/052590 2011-12-20 2012-11-09 Salient pole rotor comprising flanges for holding the lead-out wires of windings, and associated holding flanges WO2013093255A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR1162024 2011-12-20
FR1162024A FR2984630B1 (en) 2011-12-20 2011-12-20 A salient pole rotor having retaining flanges of the coil ends of coils and holding flanges associated

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12795514.4A EP2795766A2 (en) 2011-12-20 2012-11-09 Salient pole rotor comprising flanges for holding the lead-out wires of windings, and associated holding flanges

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WO2013093255A2 true WO2013093255A2 (en) 2013-06-27
WO2013093255A3 WO2013093255A3 (en) 2013-10-24

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PCT/FR2012/052590 WO2013093255A2 (en) 2011-12-20 2012-11-09 Salient pole rotor comprising flanges for holding the lead-out wires of windings, and associated holding flanges

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EP (1) EP2795766A2 (en)
FR (1) FR2984630B1 (en)
WO (1) WO2013093255A2 (en)

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DE2346345A1 (en) 1973-09-14 1975-03-27 Bosch Gmbh Robert Injection moulded skin-casing for FHP motor laminated rotor - has axially parallel holes around circumference for balancing-weights
DE3031622A1 (en) 1980-08-22 1982-04-01 Bosch Gmbh Robert Electrical machine rotor fitted with balancing weights - has reception apertures for receiving weights secured by material deformation
EP0454039A1 (en) 1990-04-24 1991-10-30 Nippondenso Co., Ltd. Alternating current generator having a plurality of independent three-phase windings
FR2710197A1 (en) 1993-09-16 1995-03-24 Valeo Equip Electr Moteur Collector reported for alternator including motor vehicle.
FR2745445A1 (en) 1996-02-28 1997-08-29 Valeo Electronique motor vehicle alternator used as a generator and as an electric motor for starting the engine of the vehicle internal combustion
DE19835044A1 (en) 1998-08-04 2000-02-10 Fhp Motors Gmbh Rotor for commutator motor for driving household appliances especially washing machines
FR2784248A1 (en) 1998-10-02 2000-04-07 Valeo Equip Electr Moteur for vehicle alternator with backlash on interpolar magnets
WO2001069762A1 (en) 2000-03-10 2001-09-20 Valeo Equipements Electriques Moteur Polyphase electric rotary machine
US20020175589A1 (en) 2001-05-28 2002-11-28 Mitsubishi Denki Kabushiki Kaisha Automotive alternator
WO2003019748A1 (en) 2001-08-30 2003-03-06 Honeywell International Inc. System and method for end turn retention on a high speed generator rotor
US6784586B2 (en) 2001-01-05 2004-08-31 Valeo Equipments Electriques Moteur Hybrid alternator with an axial end retainer for permanent magnets
FR2855673A1 (en) 2003-05-26 2004-12-03 Valeo Equip Electr Moteur rotating electric machine such as an alternator or starter, especially for a motor vehicle
FR2856532A1 (en) 2003-05-27 2004-12-24 Valeo Equip Electr Moteur Electrical rotating machine e.g. alternator, for motor vehicle, has joint with radial retention intervening between central core and one of projecting intermediate parts that are equipped with recess for housing permanent magnet
WO2007000385A1 (en) 2005-06-28 2007-01-04 Thomson Licensing System and method for avoiding error correction redundancy over the last link
WO2007003835A1 (en) 2005-06-28 2007-01-11 Valeo Equipements Electriques Moteur Projecting pole rotor comprising coil end support plates and rotary electric machine comprising one such rotor

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2346345A1 (en) 1973-09-14 1975-03-27 Bosch Gmbh Robert Injection moulded skin-casing for FHP motor laminated rotor - has axially parallel holes around circumference for balancing-weights
DE3031622A1 (en) 1980-08-22 1982-04-01 Bosch Gmbh Robert Electrical machine rotor fitted with balancing weights - has reception apertures for receiving weights secured by material deformation
EP0454039A1 (en) 1990-04-24 1991-10-30 Nippondenso Co., Ltd. Alternating current generator having a plurality of independent three-phase windings
FR2710197A1 (en) 1993-09-16 1995-03-24 Valeo Equip Electr Moteur Collector reported for alternator including motor vehicle.
FR2745445A1 (en) 1996-02-28 1997-08-29 Valeo Electronique motor vehicle alternator used as a generator and as an electric motor for starting the engine of the vehicle internal combustion
US6002219A (en) 1996-02-28 1999-12-14 Valeo Electronique Alternator used both as a generator and as a motor for starting the engine of a self-propelled vehicle
DE19835044A1 (en) 1998-08-04 2000-02-10 Fhp Motors Gmbh Rotor for commutator motor for driving household appliances especially washing machines
FR2784248A1 (en) 1998-10-02 2000-04-07 Valeo Equip Electr Moteur for vehicle alternator with backlash on interpolar magnets
WO2001069762A1 (en) 2000-03-10 2001-09-20 Valeo Equipements Electriques Moteur Polyphase electric rotary machine
US6784586B2 (en) 2001-01-05 2004-08-31 Valeo Equipments Electriques Moteur Hybrid alternator with an axial end retainer for permanent magnets
US20020175589A1 (en) 2001-05-28 2002-11-28 Mitsubishi Denki Kabushiki Kaisha Automotive alternator
WO2003019748A1 (en) 2001-08-30 2003-03-06 Honeywell International Inc. System and method for end turn retention on a high speed generator rotor
FR2855673A1 (en) 2003-05-26 2004-12-03 Valeo Equip Electr Moteur rotating electric machine such as an alternator or starter, especially for a motor vehicle
FR2856532A1 (en) 2003-05-27 2004-12-24 Valeo Equip Electr Moteur Electrical rotating machine e.g. alternator, for motor vehicle, has joint with radial retention intervening between central core and one of projecting intermediate parts that are equipped with recess for housing permanent magnet
WO2007000385A1 (en) 2005-06-28 2007-01-04 Thomson Licensing System and method for avoiding error correction redundancy over the last link
WO2007003835A1 (en) 2005-06-28 2007-01-11 Valeo Equipements Electriques Moteur Projecting pole rotor comprising coil end support plates and rotary electric machine comprising one such rotor

Also Published As

Publication number Publication date
WO2013093255A3 (en) 2013-10-24
EP2795766A2 (en) 2014-10-29
FR2984630B1 (en) 2016-06-24
FR2984630A1 (en) 2013-06-21

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