Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K19/00—Synchronous motors or generators
  • H02K19/16—Synchronous generators
  • H02K19/36—Structural association of synchronous generators with auxiliary electric devices influencing the characteristic of the generator or controlling the generator, e.g. with impedances or switches
  • H02K19/365—Structural association of synchronous generators with auxiliary electric devices influencing the characteristic of the generator or controlling the generator, e.g. with impedances or switches with a voltage regulator
• • 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
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K19/00—Synchronous motors or generators
  • H02K19/16—Synchronous generators
  • H02K19/36—Structural association of synchronous generators with auxiliary electric devices influencing the characteristic of the generator or controlling the generator, e.g. with impedances or switches

Definitions

• the present invention relates generally to alternators or alternator-starters for motor vehicles.
• the invention relates to an alternator comprising a stator comprising several phases and surrounding a rotor secured to a shaft intended to be driven in rotation by the internal combustion engine of the motor vehicle via a transmission device comprising at least one belt and a drive member such as a pulley integral with the rotor shaft.
• the stator comprises at least two armature windings connected to a current rectifying device belonging to an electrical supply device, in particular for an on-board network of a motor vehicle.
• the armature windings each belong to a power source mounted between ground and a power line.
• Each source comprises at least one armature winding and a bridge of rectifying elements, such as diodes.
• These two sources include one an auxiliary bridge of rectifiers of positive type, the other an auxiliary bridge of rectifiers of negative type, means connected to both of these two bridges being able to be ordered to: in a first state, connect the two auxiliary bridges in series, the rectified voltage supplied to the supply line then being the sum of the voltages supplied by the armature winding (s) of each of the two sources and rectified , in a second state, block the connection between the two auxiliary bridges, the two sources then supplying the supply line in parallel.
• the object of the present invention is to take advantage of this arrangement in a simple and economical manner.
• an alternator of the above-mentioned type is characterized in that the auxiliary bridges of rectifier elements are located centrally with respect to the bridges of rectifier elements of the two sources and in that said bridges are carried by a support integral with the rear bearing in the alternator. Thanks to the invention, the available space is better occupied, the auxiliary bridges being located inside the other bridges.
• it is the rear landing which itself carries the rectifier and auxiliary bridges.
• the rectifier and auxiliary bridges. are carried by an intermediate plate secured to the rear bearing of the alternator.
• the rear bearing or the plate secured to the rear bearing are water-cooled.
• the bridges of rectifier elements each have diodes, said diodes being grouped by phase and carried by the rear bearing of the alternator.
• the means connecting the two auxiliary bridges to each other advantageously consist of at least one transistor of the CMOS type interposed between the two auxiliary bridges.
• several CMOS type transistors mounted in parallel are provided.
• These transistors are integrated into the bridges of rectifier elements by being mounted on the rear bearing or on the plate secured to the rear bearing.
• a clipping device is associated with bridges and transistors of the CMOS type.
• FIG. 1 is a sectional view of a alternator according to the invention
• - Figure 2 is a rear view of an embodiment of the rotor of the alternator of Figure 1
• Figure 3 is a top view with partial section of the rotor of the alternator of the Figure 1
• Figure 4 is a view similar to Figure 1 for a second embodiment of the invention
• Figure 5 is a schematic view of an electrical supply device with two three-phase sources mounted on the alternator Figures 1 and 4
• Figure 6 is a view similar to Figure 5 for another alternative embodiment
• Figure 7 is a view along arrow 7 of Figure 1 without the cover and the rear bearing of the alternator
• Figure 8 is a view along the arrow 7 of FIG.
• FIG. 9 is a view of the clipping-switch device assembly of the current rectifying device
• FIG. 10 is a perspective view of an integrated assembly comprising the rectifying device
• FIG. 11 is a perspective view of the stator of Figure 1, with conductive elements removed to show the notches in the body
• - Figure 12 is a schematic representation of an example of connection of the phase windings
• Figure 13 is a cross-sectional view showing the arrangement conductive elements in a notch in a first embodiment of the invention.
• the alternator comprises, going from left to right of FIG. 1, that is to say from front to back, a drive pulley 1 secured, here by means of a nut, of the front end of a shaft 2, the rear end of which carries slip rings (not referenced) belonging to a manifold 3.
• the axis of the shaft 2 constitutes the axis of rotation XX of the machine.
• the shaft 2 centrally carries the rotor 4 with an excitation winding 5, the ends of which are connected by connections to the collector 3 as visible in FIG. 3.
• the excitation coil is curved in shape barrel so as to fill as much as possible the space between the internal face of the teeth, described below, and the rotor core.
• the rotor 4 is here a Lundel type claw rotor and therefore comprises two front pole wheels and rear 6, 7 carriers each respectively a front fan 8 and rear 9 for, given space, allow an increase in the power of the machine and reduction of noise thereof.
• Each wheel 6, 7 has a flange perpendicular to the axis of the shaft 2. At the outer periphery of the flanges are formed teeth extending axially.
• the teeth have a trapezoidal shape and, for further reduction of the noises of the machine, are provided with anti-noise chamfers at the level of their rooting zone at their flange as described in document EP-B-0 515 259 to which reference will be made for more information.
• the teeth of one of the wheels are directed towards the other wheel while being angularly offset with respect to the teeth of this other wheel. There is thus nesting of the teeth so that in an alternative embodiment of the permanent magnets are interposed between the teeth to further increase the power of the machine.
• profiled grooves are formed in the lateral edges of the teeth to receive the permanent magnets as described in document FR-A-2 784 248.
• each pole wheel When the winding 5 is activated the rotor 4 is magnetized and it thus defines pairs of poles magnetic, each pole wheel then comprising respectively N North poles and N South poles formed by the teeth.
• each pole wheel For more details, reference will be made to document EP-A-0 515 259, the teeth of the pole wheels having laterally each at least one anti-noise chamfer.
• each pole wheel has 7 teeth. Of course it depends on the applications.
• the fans 8, 9 comprise for example two series of blades or vanes 90 and 91 of different length, as visible in FIG. 2, which provide ventilation channels between them.
• the blades are produced by cutting and folding a fixed flange, for example by welding 92 or any other means such as crimping, on the pole wheel 6, 7 concerned; each wheel having, as mentioned above, axial teeth directed towards the other wheel with nesting of the teeth from one wheel to the other for formation of magnetic poles when the winding 5 is activated thanks to the collector rings of the collector 3 each in contact with a brush (not referenced) carried by a door -brooms 10 also serving as a support for a voltage regulator (not visible) electrically connected to the brushes.
• the regulator is connected to a current rectifying device 11, such as a diode bridge (two of which are visible in FIG. 1) itself connected to the outputs of the phases provided with windings, which comprises the stator 12 of 1 alternator surrounding the rotor 4.
• a current rectifying device 11 such as a diode bridge (two of which are visible in FIG. 1) itself connected to the outputs of the phases provided with windings, which comprises the stator 12 of 1 alternator surrounding the rotor 4.
• These fans 8, 9 extend in the vicinity respectively of a front bearing 13 and a rear bearing 14.
• the bearings 13, 14 are metallic, being here based on aluminum.
• the bearings 13, 14 have lugs for fixing them to a fixed part of the vehicle. It is through the bearings that the alternator can be connected to earth.
• These bearings 13, 14 are perforated for internal ventilation of the alternator by means of the fans 8, 9 when the fan assembly 8, 9 - rotor 4 - shaft 2 is rotated by the pulley 1 connected to the engine of the motor vehicle by a transmission device comprising at least one belt engaged with the pulley 1. This ventilation makes it possible to cool the windings of the stator 12 and the winding 5 as well as the brush holder 10 with its regulator and the straightening device 11.
• the cooling fluid in this case air, passes through the various openings of the bearings 13, 14 and enters the interior of the machine in a manner known per se.
• This fluid scans, by means of the fans 8, 9, the buns which comprise the windings of the stator 12 in the manner described below.
• This fluid then advantageously exits through radial vents present on the rear and / or front bearings.
• the two bearings are hollow in shape and each have a transverse flange extended at its outer periphery by an annular rim of axial orientation stepped at its free end for centering mounting of a body 18 presented by the stator 12.
• a radial air gap exists between the outer periphery of the teeth of the rotor 4 and the internal periphery of the body 18 of the stator 12 carried by the bearings 13,14 forming a casing.
• the flanges and the edges of the bearings are perforated for air circulation. Openings therefore exist opposite the stator buns.
• the straightening device 11, the brush holder 10, as well as a perforated protective cover 17, here made of moldable plastic, are fixed to the bearing 14 as described below so that the rear fan 9 is more powerful than the front fan 8 because it provides cooling for the power electronics and the stator.
• the bearings 13, 14 are connected together, here by means of screws or alternatively of non-visible tie rods, to form a casing or support intended to be mounted in the aforementioned manner on a fixed part of the vehicle.
• the bearings 13, 14 each centrally carries a ball bearing 15, 16 for rotationally supporting the front and rear ends of the shaft 2 passing through the bearings to carry the pulley 1 and the collector rings
• This collector is of the conventional type. More precisely
• FIGS. 2 and 3 the input 50 and output 51 wires of the winding 5 of this rotor are connected to the collector 3.
• a conventional, symmetrical collector already used for alternators with an even number of pairs of poles, an advantageous arrangement is provided, which will now be described with reference to FIGS. 2 and 3.
• the rotor comprises two front and rear pole wheels 6 and 7 each carrying their periphery of the teeth, referenced 71 to 77 following the periphery of the rear polar wheel in the normal direction of rotation of the rotor 4 symbolized by an arrow in FIG. 2.
• Each polar wheel comprises 7 teeth since the alternator in the first mode of realization includes 7 pairs of poles.
• the teeth 71 to 77 of the rear pole wheel are separated from each other by grooves 71 'to 77'.
• the rotor 4 also includes 2 hooks 78 and 78 'carried by the rear face of the rear pole wheel 7. These hooks 78 and 78' are located near the shaft 2 and are diametrically opposite with respect to the axis of the tree 2.
• the input wire 50 connects the hook 78 to the coil 5. It extends radially from the hook 78 to the first groove 71 '.
• the output wire 51 connects the hook 78 ′ to the coil 5 passing through a hole made at the base of the tooth 74, that is to say in a direction exactly diametrically opposite to the first throat 71 '.
• the two input and output wires 50 and 51 are symmetrical with respect to the axis of rotation of the machine and this device therefore adapts to a conventional manifold 3.
• the mounting of the coil 5 is difficult because it is necessary to pass the output wire 51 blind into the hole, which risks causing many manufacturing defects.
• the lead wire 51 extends radially from the hook 78 'to a second groove, this second groove being the groove 74' or the groove
• the output wire 51 passes through the groove 75 ', because this arrangement is more favorable for hooking to the hook 78'.
• This arrangement avoids having to drill a hole in the rotor and nevertheless makes it possible to connect the input and output wires 50 and 51 to a symmetrical collector 3.
• Capstans 79 are located in gorges 71 'and 74' / 75 '. These capstans 79 each comprise a radial rod secured to the rotor at one end, and a block mounted at the opposite free end.
• the input and output wires 50 and 51 each make a tour of the capstans 79 respectively located in the first and second grooves 71 'and 74' / 75 'before joining the coil 5. It should be noted that this arrangement of the wires inlet and outlet 50 and 51 requires providing a passage for the wires in the rear fan 9.
• This arrangement can obviously be used with any rotor comprising a number of pairs of odd poles.
• the number of pairs of magnetic poles is even with each pole wheel comprising 6 or 8 teeth.
• the rear fan 9 has clearances 93 and 94 which respectively allow the passage of the wires 50 and 51 between the flange of the rear pole wheel and the fan.
• the alternator is cooled by a liquid, such as water from the cooling circuit of the internal combustion engine of the vehicle. automobile.
• a liquid such as water from the cooling circuit of the internal combustion engine of the vehicle. automobile.
• the alternator is devoid of fans and the front bearing 130 is reduced to a simple plate, while the rear bearing 140, of hollow form, has chambers 1400 and 1401 produced respectively in its peripheral rim and in its flange back. These chambers are connected to coolant outlet and inlet conduits, one of which is visible in 1402. These conduits are connected to the cooling circuit of the motor vehicle engine so that water circulates in the chambers 1400 and 1401 to remove calories.
• the alternator can therefore have greater power.
• helical grooves are formed at the external periphery of the teeth of the rotor as described in document FR-A-2 774 524 to cut the eddy currents.
• the body 18 of the stator is alternatively in direct contact with the coolant as described in document FR-A-2 793 083.
• the alternator as a variant is equipped with axial fans as described in document FR 01 01526 deposited on 02/01/2001 so that in an alternative embodiment the alternator is cooled by water and by air.
• the rotor has salient poles with integration of permanent magnets in the rotor as described in the document FR 01 00122 filed on 05/01/2001.
• the magnets are closed at each of their ends by a non-magnetic holding piece.
• the rotor then comprises several excitation windings wound around the salient poles; the rotor comprising a bundle of sheets.
• the alternator may include a rotor provided with two excitation windings, each winding being mounted between the two flanges of two pole wheels as in FIGS. 1 and 4. In this case, the number of pole wheels is doubled; two pairs of even wheels are then provided.
• the body 18 of the stator 12 consists of a package of notched sheets forming grooves for mounting the armature windings of the stator.
• Each winding comprises electrically conductive elements insulated from each other and passing through the body of the stator to form outside of this body networks forming buns projecting on either side of the body 18.
• the windings are made up of alternative wires of electrically conductive elements, such as pins.
• the stator windings belong to armature windings of two electrical power sources, which are both mounted between ground and a power line of the on-board network of the motor vehicle. To these windings are associated bridges of rectifier elements belonging to the rectification device 11.
• the stator with its armature windings forms an armature, which generates an alternating armature current rectified in direct current by the rectifying device 11 to supply the consumers of the vehicle and recharge the vehicle battery.
• the armature windings are connected to the current rectifying device to work in series and in parallel as described in document WO 01/76052 to which reference will be made for more details.
• the windings of the armature windings belong to an electrical power supply device, in particular for an on-board network of a motor vehicle, comprising at least two power sources which are both mounted between earth and a power line and which each comprise at least one armature winding and a bridge of rectifying elements.
• These two sources have one an auxiliary bridge of rectifiers of positive type, the other an auxiliary bridge negative type rectifier elements, means connected to one and the other of these two bridges being able to be controlled for:
• a control means is a controllable switch interposed between the two auxiliary bridges; a control means is a controlled diode interposed between the two auxiliary bridges;
• a control means is a CMOS type transistor interposed between the two auxiliary bridges;
• a control means comprises controlled diodes which constitute rectifying elements of one and / or the other of the two auxiliary bridges;
• the two sources are synchronous sources, the rectifier elements of the two auxiliary bridges being linked in pairs and ensuring the connection between the phases of the two sources which correspond, the branches which connect two rectifier elements of one and the other two auxiliary bridges being two by two connected by means forming a switch, these means forming a switch constituting the control means;
• the two sources are synchronous three-phase sources and the control means comprises at least one double switch.
• the two armature windings consist respectively of an armature winding mounted in a triangle and a armature winding mounted in a star.
• the armature winding mounted in a triangle has a number of turns per notch equal to the number of turns per notch of the winding or armature winding mounted in a star that multiplies the square root by the number of phases of the electric machine.
• FIGS. 1 and 4 two three-phase sources are provided, comprising armature windings associated with bridges of rectifying elements.
• the armature windings are stator windings of the same alternator described above.
• the bridges each have two diode half-bridges, one positive and the other negative. These bridges belong to the straightening device 11.
• Each of the two sources is also associated with an auxiliary bridge of rectifying elements, such as diodes.
• FIG. 5 An example of a possible embodiment with three-phase sources is shown in FIG. 5.
• the three-phase windings of the first source have been referenced by Nil, N12, N13, while those of the second source have been referenced by N21, N22 and N23.
• the positive diodes of the PI bridge associated with the first source have been referenced by DU, D12, D13, while its negative diodes have been referenced by D14, D15 and D16.
• the two auxiliary bridges one of the positive type, the other of the negative type, have been referenced by P aux ⁇ and P a ⁇ x2 -
• the diodes of the P aux ⁇ bridge are connected to the armature windings of the source 1 by their anodes, while the diodes of the bridge P aU ⁇ 2 are connected to the armature windings of the source 2 by their cathodes.
• a controlled switch I is interposed between the points A1 and A2, which are respectively the point at which the diodes of the bridge P to the ⁇ are connected by their cathodes and the point at which the diodes of the bridge P auX2 are connected by their anodes.
• the value of the voltage s is then the sum of V 1 and V'2, where V'2 is the value of the rectified voltage delivered by the second three-phase source (source 2).
• Vs being greater than VI
• the positive diodes of the bridge PI namely DU, D12, D13
• the negative diodes of bridge 2 namely D24, D25, D26, are themselves polarized by VI which is greater than 0; they are therefore also blocked and isolate the three-phase system 2 from ground.
• the switch I can be replaced, either by a controlled diode, or by a transistor T of the CMOS type as shown in FIG. 6.
• the CMOS transistor T must be oriented so that the intrinsic diode associated with it in parallel by construction is opposite to the diodes of the two auxiliary bridges.
• the transistor T of the CMOS type is replaced by three transistors Tl of the CMOS type in parallel to reduce the internal resistance, each transistor comprising a freewheeling diode.
• the auxiliary bridges of rectifier elements are located centrally with respect to the rectifier bridges PI, P2 of the two sources.
• the PI, P2 bridges, called main bridges, and the auxiliary bridges are carried by a support integral with the rear bearing of the alternator.
• the auxiliary bridges are located centrally so that they are located close to the X-X axis of rotation of the rotary electrical machine.
• the diodes of the auxiliary bridges are therefore surrounded by the diodes of the main bridges.
• FIG. 4 it is the flange, of transverse orientation relative to the axis X-X, of the rear bearing 140 which directly carries the bridges and therefore the straightening device; knowing that this bearing is water cooled.
• FIG. 1 it is a plate 300 which carries the straightening device 11 while being attached to a fixing, for example using balusters 301, on the rear bearing 14.
• the plate 300 is metallic, advantageously being based on aluminum, and comprises a chamber 302 connected to inlet and outlet conduits output connected to the cooling circuit of the motor vehicle engine as in Figure 4.
• the plate 300 has locally, according to one embodiment, an opening for the housing in its thickness of the brush holder-regulator assembly 10.
• the length of the spacers 301 is a function of the thickness of this assembly 10.
• the spacers allow the passage of air.
• the plate 300 is devoid of channel 302, the cooling being carried out only by the circulation of air coming to lick the front face of the plate 300.
• the arrow Fm indicates the direction of flow of the cooling fluid which enters radially between the rear face of the rear bearing and the front face of the plate 300. Then, this cooling fluid penetrates inside the alternator by the inlet openings 1420 under the effect of the suction created by the rear fan 9 The air then exits through radial vents 1421 located on the rear bearing.
• the cover 17 has openings in the vicinity of the rear face of the plate 300.
• the main and auxiliary bridges are therefore placed on the plate 300 or on the rear bearing 14.
• These bridges here comprise current rectifying elements in the form of diodes.
• These diodes are in one embodiment of the pressfit type diodes, that is to say mounted by force fitting in openings made in electrically insulated dissipators and plated on the rear bearing or the plate 300.
• FIGs 1 and 4 we see two of these diodes force-fitted using a knurled body on a dissipator, here metallic, to better dissipate the heat.
• the rear dissipator 201 is said to be a positive dissipator 201 because it is connected to the positive terminal of the vehicle battery via the supply line for the Figures 5 or 6, while the front sink 202 is said to be a negative sink because it is connected to the vehicle ground.
• the diodes are mounted by welding on their associated dissipator. These diodes have tails 209 directed towards the rear of the bearing 14 or of the plate 300 and pass through openings made in a connector 200.
• This connector has a network of electrically conductive tracks embedded in an electrically insulating material by molding. The tracks have stripped axial orientation tabs at the tails 209 of the diodes for connection by welding therewith.
• the connector also has insulating barrels 207 crossed by fixing members, here screws 208, for fixing the connector to the plate 300 or to the bearing 14.
• Each barrel 207 is shouldered for tightening the dissipators 202, 201 between the shoulders of the barrels 207 and the rear face of the plate 300 or of the bearing 14.
• an electrical insulator 204 is interposed between the heatsinks 202 and 201.
• an electrical insulator 203 can be interposed between the negative heatsink 202 and the rear face of the plate or of the bearing.
• the connector 200 also has tabs 211 for fixing the ends of the stator windings belonging to the armature windings as shown in FIG. 7.
• the internal periphery of the positive dissipator 201 is serrated to form clearances for the passage of the negative diodes of the main bridges PI and P2.
• the positive diodes are therefore located on a radius greater than that of the negative diodes.
• the heatsinks are in the form of annular sectors extended by fixing lugs 1422 for housing therebetween a support 400 with lugs for its connection with the main bridges.
• This support 400 here carries the three aforementioned Tl transistors as well as the clipping device 500.
• This device 500 is of the type described in document EP-A-1032 110 to which reference will be made for more details.
• This device is associated with the voltage regulator and comprises a controlled power switch mounted in series with the excitation winding 5 of the rotor 4. This switch is controlled by means sensitive to the appearance of an overvoltage at the output of the alternator to block this power switch until the voltage across the excitation winding 5 has reached a given reverse demagnetization voltage.
• the brush holder 10 projects in the center of the straightening device 11 as visible in FIG. 8; the plate 300 or the bearing being drilled centrally.
• a ceramic or plasma coating may be used as protection for the dissipators and ensure resistance to salt spray and to corrosion.
• the power module carried by the support 400 and comprising the transistors T1 and the device 500 is in an alternative embodiment produced on an isolated substrate of the SMI type or else produced in a power technology solution.
• the voltage regulator and the rectifying device 11 are shaped here to work with an on-board network of 42V.
• the main and auxiliary bridges can be made in power technology.
• diodes of the proposed devices can be replaced by diodes of the ZENER type with an appropriate clipping voltage or with so-called SHOTT Y diodes.
• the invention can also be implemented for alternators of a motor vehicle of the type described above but comprising a stator wound with large diameter conductors in the form of bars.
• a stator winding is described, for example, in document WO 92/06257.
• These bar-shaped conductors fill well the notches in the stator body and are generally in the form of pins of advantageously round, square or rectangular section.
• Conductors in the form of bent bars can for example advantageously replace the pins. Thanks to the invention, such a stator wound with large conductors in the form of bars can be cooled easily.
• FIGS. 11 and 12 represent solutions with triangle assemblies and a stator 12 comprising a cylindrical body 18 of axis XX 'and two series of three phases PI to P3 and P4 to P6 constituting two series of three-phase windings offset by 30 ° electric and behaving like a hexaphase winding seen from the side of the rectifying device.
• Each phase PI to P6 is each formed by a plurality of electrically conductive elements 20 mounted in series along the periphery of the stator 12 between an input, respectively El to E6, and an output, respectively SI to S6, to form at least winding phase by phase.
• the cylindrical body 18, also called a sheet bundle comprises in its radially internal face radial notches L for receiving at least four phase conductive elements 20.
• the conductive elements 20 are juxtaposed in the notch L in the radial direction to form at least four layers of conductive elements C1 to C4, as shown in FIG. 13 in the case of notches with 4 conductive elements.
• Each conductive element 20 has the shape of a pin extending between two notches L and comprising a first branch which is placed in a notch in a predetermined layer, a second branch arranged in another notch in a predetermined layer and, between the two branches, a head forming a U seen in the peripheral direction of the stator.
• the U-shaped heads are generally all arranged on a first axial side of the body 18, forming a first bun.
• the branches of the conductive elements protrude from a second axial side of the body 18 by free ends, each free end being electrically connected to a free end of a branch of another conductive element, for example by welding, thus forming the windings phase.
• the free ends form the second bun.
• the conducting elements 20 engaged by their first branches in a first notch L is engaged by their second respective branches in the same second notch, each forming between said two notches said U.
• the branches all extend parallel to the axis XX '.
• the conducting elements 20, the inputs E1 to E6 and the outputs S1 to S6 are in the form of metal bars, typically of copper, typically of rectangular section, although other shapes of section can be envisaged as circular or oval sections.
• the notches L extend over the entire axial length of the body 18. They are radially oblong and of semi-closed type, as can be seen in FIG. 13. These notches L are distributed circumferentially in a regular manner.
• the conductive elements 20 are mounted axially by threading in the notches L.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Synchronous Machinery (AREA)
• Windings For Motors And Generators (AREA)

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