KR20120091030A - Current-rectifying arrangement for a rotary electric machine, in particular for an alternator of an automobile, and rotary electric machine comprising such an arrangement - Google Patents

Abstract

The present invention relates to a current rectifying device (1) for a multiphase rotary electric machine having bearings (16, 18) provided with a perforated plate (3), which device has a first current rectifying element (8). A heat sink 9, a second current rectifying element 10 supported on the plate 3, and a connector 113 interposed between the heat sink 9 and the plate 3, each first current rectification. The element 8 is mounted to blind cooling cells A, B and C, which are bounded by protruding peripheral walls 91, 92 and 93 and on the side and around the outer periphery of the heat sink 9. Bounded by two protruding transverse walls extending from to the inner periphery, each cell comprising at least one outer perforation formed around the inner periphery of the cell, between the two transverse walls opposite the two consecutive cells. A transverse passage is provided. Rotary electric machines include such devices. The present invention can be used in automotive alternators.

Description

CURRENT-RECTIFYING ARRANGEMENT FOR A ROTARY ELECTRIC MACHINE, IN PARTICULAR FOR AN ALTERNATOR OF AN AUTOMOBILE, AND ROTARY ELECTRIC MACHINE COMPRISING SUCH AN ARRANGEMENT }

The present invention relates to a current rectifying device for a multiphase rotary electric machine, in particular an automotive alternator, provided with a bearing housing, comprising: a plate belonging to the bearing housing and provided with an air inlet opening; A shield-type heat sink fixed to the bearing housing and having a first current rectifying element such as a diode; A second current rectifying element such as a diode held on a plate of the bearing housing; And a connector interposed between the heat sink and the plate.

The invention also relates to a rotary electric machine comprising such a device.

Such devices and such multiphase machines are described in the documents WO 02/29958, WO 02/093717, EP 1 482 622, EP 1 460 750 and US 2004/0051409.

For further information refer to these documents and FIG. 1 (axial section) of FIG. 3 of WO 02/093717 and FIG. 7 of document WO 02/029958 of a rotary electric machine in the form of a multiphase alternator with internal ventilation. This rotary electric machine is provided with a current rectifying device 1 and at least one internal fan 102, 104 for cooling the alternator. The apparatus 1 comprises a metal heat sink 9 (referred to as a positive heat sink) and a plurality of second current rectifying elements having a plurality of first current rectifying elements (herein referred to as positive diodes). It comprises here a metal support element 3 carrying a diode 10 called a negative diode.

The partially shown voltage regulator / brush holder assembly is located between the circumferential ends of the heat sink 9, as can be seen in FIG. 1 of document WO 02/093717.

The machine has a rotation axis (XX), a central axis 15, a rotor 13 fixed to the axis 15, a stator 12 surrounding the rotor 13, and a stator and in the center a shaft (15) having a casing holding the axisymmetric axis thereof coincident with the axis XX, and a perforated protective cover 27, which covers the device 1 and the assembly 116. To cover.

The casing comprises at least two members 16, 18 called front bearing housing and rear bearing housing, respectively.

The rotor 13 and the stator 12 are mounted inside the casings 16 and 18. The stator 12 embedded in the casings 16 and 18 includes a stator body 19 having a stator winding 23, and an end of the stator winding (referred to as the coil end 39) of the body 19 It protrudes in the axial direction from both sides.

Here, the bearing housings 16 and 18 are substantially annular and hollow. Each of these housings has a bottom in the form of a plate oriented transversely with respect to axis X-X and an annular rim oriented approximately axially with respect to axis X-X around its outer periphery. Each rim includes an annular radial face, which has machined associated free ends 26, 28 that delimit the joint face. The bearing housings 16, 18 are here connected together by means of fastening screws 29.

Each rim is connected to the outer periphery of its plate, which plate has a recess at its center, which is delimited by a cylindrical web for mounting the outer rings of the ball bearings 105, 106.

The bearing 105 is in contact with the web of the bearing housing 18, and a cap 60 is interposed in the radial direction between the web 6 of the bearing housing 16 and the bearing 106.

Each of the front and rear ends of the shaft 15 is fitted to the inner ring of the associated bearings 105, 106 for rotational mounting of the shaft 15 and the rotor 13, wherein the rotor is at its respective axial end an inner fan 102, 104).

The brush of the voltage regulator / brush holder assembly is adapted to rub against two collector rings 17 fixed to the rear end of the shaft 15 having a smaller diameter, with a pulley fixed to the front end of the shaft 15. .

The pulley is adapted to receive a belt that forms part of a motion transfer device driven by the internal combustion engine of the motor vehicle. Each plate and each rim of the bearing housings 16, 18 comprises an air inlet opening and an air outlet opening for the internal circulation of the cooling fluid (here air). This air circulation is achieved by the fans 102 and 104 and is located on top of the fans 102 and 104 provided with the device 1, the assembly 116, the bearings 105 and 106 and the blades ( The coil end 39 of 12 is cooled.

The bearing housings 16, 18 are made of metal, are electrically conductive, and are made of castable material (here aluminum). The bearing housings are fixed to a fixture connected to the mass of the vehicle which is connected to the negative terminal of the battery.

The body 19 of the stator 12 consists of an axial stack of transverse metal sheets, each metal sheet comprising axially aligned notches, which notches emerge from the inner periphery of the body 19 and An electrically conductive axial turn of the coil 23 is received with the notch insulation interposed therebetween.

For each phase of the alternator, the electrical coil 23 is formed of a winding of a winding of an electrically conductive wire, for example covered with electrical insulation.

At each notch of the body 19 the coil 23 has a group of electrically conductive elements, which elements pass through the notch in the axial direction and are joined to the windings forming the coil end 39 of the body 19. It extends from the outside.

In one variant, as shown in documents WO 92/06527 and FR-A-2 819 117, soldered pins are used which are mounted in the notches in the body 19.

In all cases, the body 19 has windings that make up the coil 23. These stator windings belong to the phase of the alternator. Each phase contains one or two windings. Each of the outputs 214 of these phase windings, for example connected in a star or delta form, is fixedly connected to the connector 113 of the device 1, which connector has a connecting hook 114 for this purpose.

The alternator of FIG. 1 is three phase and includes one winding per phase. The three outputs 214 of these phase windings are electrically insulated and passed through the plate 3 of the rear bearing housing 16 by an opening around the outside of the plate 3. These three outputs can be seen more clearly in the document WO 02/29958, which also defines the body 19 of the stator 12 by means of a flat annular joint 46, a thermally conductive resin 50 and a pad 34. It also describes mounting elastically.

The rotor 13 here is a claw rotor, which comprises a cylindrical electrical excitation coil 62, which is held in a tubular core 67 sandwiched between two plates 64, 66. Each plate comprises claws 68 and 70, respectively, which claws are angularly biased and also have approximately trapezoidal teeth about their outer periphery, which teeth are axially oriented in the direction of the other plates 66, 64. Extend in the direction. Each plate is here fixed to the shaft 15 by means of the knurled portions of the shaft, one of which serves to fix the core 67. The collecting ring 17 is connected to the end of the coil 62 by a wire connection passing behind the fan 104.

In one variant, as described in document FR 2905806, a permanent magnet is interposed between the two claws 68, 70 to increase the power of the machine.

In this figure, the device 1 is fixed to the rear bearing housing 16 and the element supporting the negative diode is a plate 3 of the bearing housing 16 which constitutes a heat sink (called a negative heat sink). Is made of.

The device 1 in this example comprises three pairs of positive diodes 8 and negative diodes 10. Positive diode 8 is held in heat sink 9 (here metal). This heat sink 9 is in particular connected to a connector 113 made of an electrical insulator (here plastic material) molded on a set of flat electrical conductors which can be seen locally on the hook 114 which secures the output 214. It is separated from the plate 3 by this. This connector 113, together with the diodes 10 and 8 in its conductor, forms a current rectifying bridge belonging to the device 1.

The heat sink 9 and the connector 113, which are approximately in the form of a shield, are arranged next to each other in the axial direction and electrically insulated and fixed to the plate 3 of the bearing housing 16 with bolts and nuts 115. do.

The connector 113 is in local contact with a protrusion (here chimney) in the plate 3, which has a screw hole provided for screwing the bolt 115.

The lid 27, made of a plastic material, is snapped and fixed to the threaded portion of the bolt 115, as described in document WO 01/69762.

This heat sink 9 is provided with a fin for the axial opening and cooling of the diode 8, which is hotter than the diode 10.

The connector 113 is configured to allow air to pass freely under the axial opening of the heat sink 9, which is fitted with the air inlet opening 7 in the bearing housing 16.

In one variant, as described in documents EP 1 482 622, EP 1 460 750 and US 2004/0051409, the element supporting the negative diode is a separate negative heat sink fixed to the plate of the bearing housing. In all cases, a negative current rectifying element, such as a diode or MOSFET type transistor, is held on the plate of the associated bearing housing of the alternator, and the connector is interposed between the positive heat sink and the negative heat sink in the axial direction.

For recording, when the rotor 13 rotates and current flows through the excitation field winding 62, the rotor is magnetized and alternating current is induced in the winding of the stator 12 to generate it. The current rectifier 1 rectifies the alternating current induced in the winding of the coil 23 of the stator to direct current to supply to the consumer and also to recharge the battery of the vehicle.

A voltage regulator acts on the coil 2 to limit the voltage to protect the consumer.

In order to cool the device 1, in particular the flow of air resulting from the rotation of the fan 104 is passed through an axial opening in the positive heat sink 9 and an air inlet opening 7 in the plate 3. .

The heat sink 9 is mainly convection cooled by its fins and openings.

This configuration is satisfactory.

The heat sink 9 is mainly convection cooled by its fins and openings.

This configuration is satisfactory.

In the documents EP 1 482 622 and EP 1 460 750 the positive heat sink has a more complicated shape. It has a network of protruding ribs and a number of holes. Its inner perimeter is bounded by ribs that make up the ring portion. Its outer periphery is wavy.

In document US 2004/0051409, a number of corrugated ribs and holes along these ribs are provided. This approach is less effective in terms of cooling.

Therefore, it is desirable to further improve the cooling of the positive current rectifying element held in the positive heat sink in a simple manner, especially in order to increase the power of the rotary electric machine or to install the rotary electric machine in a hotter position.

It is an object of the present invention to further improve the cooling of a current device of the kind described above in a simple manner.

To achieve this object, the apparatus is characterized in that each of the first current rectifying elements is mounted around an inner periphery of the heat sink and each is located in a cooling cell, and these cooling cells are projected peripheral walls located around the outer periphery of the heat sink. Bounded by two protruding transverse walls extending from the outer periphery to the inner periphery of the heat sink, each cell being, firstly, closed but open around the inside of the heat sink. And, second, at least one outer hole shorter in the circumferential direction than the peripheral wall of the cell, the outer hole having an inner periphery of the peripheral wall of the cell such that material is continuous between the first current rectifying element and the peripheral wall. It is bounded by and characterized in that a passage exists between two transverse walls of two consecutive cells facing each other.

Multiphase rotary electric machines are characterized by including such a device.

According to the present invention there is provided a heat sink in the form of a rough shield with increased heat exchange surface and good passage of cooling air, good mechanical strength and a protruding transverse wall delimiting the blind cells, as appropriate The blind cells are open about their inner periphery and closed with protruding peripheral walls around their outer periphery to adequately guide the passage of air through the located outer aperture. Heat sinks are light in weight. In addition, the heat sink has a simple shape and is reduced in circumferential size.

In addition, the first current rectifying element has a temperature of less than 215 ° C. at an ambient temperature of 105 ° C. in operation.

Therefore, an economical first current rectifying element (especially a diode) with a critical temperature of 215 ° C. can be used, without using a more expensive rectifying element with a critical temperature of, for example, about 235 ° C. or more.

The passage makes it easier to solder the second current rectifying element to the visible end of the associated electrical track of the connector or to fix the positive heat sink.

Cooling air passages are also formed between the transverse walls that face each other, thus allowing better cooling of the cell and the corresponding first current rectifying element.

The perimeter wall is smaller than the ribs of the prior art rib networks.

The heat sink has a simpler form than the prior art heat sinks.

According to another characteristic configuration alone or in combination with other advantages, for at least one of the cells,

At least one of the cells is provided with an inner cooling fin which protrudes inward with respect to the inner circumference of the positive heat sink, around its inner circumference;

At least one of the cells has at least two outer holes delimited by the inner periphery of the peripheral wall such that material is continuous between the first current rectifying element and the peripheral wall,

Two transverse walls of at least a pair of transverse walls (and thus of at least one cell) extend around their inner side to form an inner fin;

At least one of the transverse walls of the at least one cell extends radially inward around its inner side to form an inner cooling fin;

At least one of the cells has at least one complementary inner cooling fin 200 protruding radially inward with respect to the inner periphery of the heat sink 9, wherein the first current rectifying element 8 of the cell Located between the outer hole and the inner pin;

At least one of the cells has a larger number of additional inner fins than the other cells;

The heat sink has a plurality of access holes for the electrical connection terminals of the second current rectifying element, the number of which is smaller than the number of the first current rectifying elements;

The heat sink is shorter than the connector in the circumferential direction;

The connector is wavy around its inner side to release the heat sink;

The connector has three protrusions for local contact with the bottom surface of the heat sink and also for forming a gap between the heat sink and the body of the connector (in the form of a shield);

-The bottom of the heat sink is smooth.

According to these features, various parameters (the number of outer holes, the number of outer fins, the number of inner fins, the shape of the inner and / or outer fins in order to properly cool the first current rectifying element and to make the temperature of these elements uniform. And length, and the shape of the surrounding walls and transverse walls).

In addition, the cells are arranged in the circumferential direction with a space therebetween, so that the rear end of the negative diode can be more easily fixed and the fixing member can be more easily screwed together.

By maintaining the same cells, a terminal called a B + terminal having a radial or axial output can be provided in the heat sink.

Other objects, features, details and advantages of the present invention will become more apparent from the following description given with reference to the accompanying schematic drawings which illustrate by way of example embodiments of the invention.

1 is an axial sectional view of a rotary electric machine in the form of an alternator with a rectifying device according to the prior art.
2 is a perspective view of a rectifying device according to the present invention mounted to a rear bearing housing of an automotive alternator.
3 is a front view of the apparatus in FIG. 2.
4 is a partially enlarged view of the rectifying device of FIG. 3.
5 is a perspective view of the heat sink of FIGS. 2 to 4.
6 is a front view of the heat sink of FIG. 5.
7 is a front view of the protective cover of the current rectifying device of FIGS. 2 to 6.
8 is a front view of the connector of the current rectifying device of FIGS. 2 to 6.
9 is a partial cross-sectional view showing a snap engagement lug of the cover with the connector of FIGS. 2 to 6.
10 is a perspective view from below of the protective cover to show snap engagement lugs;
FIG. 11 is a view similar to FIG. 2, showing a perspective view of another embodiment. FIG.
12 schematically shows some electrical tracks of the connector.
FIG. 13 is a view similar to FIG. 11, showing a perspective view of yet another embodiment. FIG.

2 to 13, the same reference numerals will be assigned to the same or similar elements as in FIG.

2 to 11, the connector 13 and the positive heat sink 9 are made more compact, the positive current rectifying element 8 is cooled further, and the connector 113 and the positive heat sink 9 are further reduced. The structural solution according to the present invention for reducing the material of the body will be described. 2 to 4 and 11 show only the elements necessary for understanding the present invention. Thus, only two fastening members 115 of the device 1 are shown, and the brush holder / voltage regulator assembly is not shown so that the device 1 of the present invention for rectifying alternating current to direct current can be seen, Moreover, the output part 214 (FIG. 12) of the winding 23 'of the phase of the cover 23 and the coil 23 of the stator is not shown, either.

2 to 11, the multiphase rotary electric machine consists of a three-phase automotive alternator as in FIG. 1, while the structure of the polyphase alternator is maintained throughout, while the connector 113 and the electrically conductive positive heat sink ( 19) (here a metal and hence a good thermal conductor, both in the form of a shield) is modified.

Thus, the alternator casing comprises a stator winding, where this winding comprises three phase outputs, each phase comprising one winding.

Compared with FIG. 1, the structure of the hollow bearing rear bearing 16 belongs to an air inlet opening 7 (a transverse plate 3 having a center hole through which the rear end of the shaft 15 of FIG. 1 passes). ) And side air outlet openings 5 (belonging to the axially oriented peripheral rim 4), so that cooling air generated by the rotation of the fan 104 in FIG. , 7) cycles through. 2 and 3, two brackets 160 for fixing the bearing housing 16 (here made of aluminum) are provided to the defendant of the vehicle connected to the ground. In one variant, as shown in FIG. 11, the bearing housing 16 does not have a bracket 160, and an additional screw chimney 600 is provided on the plate 3 to fix the radial terminal. In FIG. 13, one of the two brackets of FIGS. 2 and 3 can be seen, and also a radial chimney 217 ′ for mounting the terminal 117 described later can be seen.

To remove from the mold to obtain the opening 5, this opening 5 has an axial portion which affects the rim 4 which extends in a radial portion which affects the outer periphery of the plate 3. .

The metal bearing housing 16 forms a support for the negative current rectifying element 10 with its plate 3. Therefore, this bearing housing 16 constitutes a negative heat sink that exhausts heat in conduction and convection. The size of the plate 3 is larger than the positive heat sink 9, which mainly dissipates heat in convection.

In these figures, each of the outputs 214 of the phase winding 23 ′ is a protrusion 272 in the protective cover 27 (covering the device 1 and thus the connector 113 / heat sink 9 assembly). 7) and through the radial portion of the air outlet opening and thus the plate 3.

In the embodiment shown, as in FIG. 1, the output 214 of the winding passes through an air outlet opening, the radial portion 5 ′ of which is another opening as can be seen more clearly in FIGS. 3 and 11. It is deeper than the radial direction part of (5).

In one variant, at least one of the outputs of these windings will pass through certain closed openings formed around the outside of the plate 3.

The heat sink 9 and the connector 113 firstly have first ends 95, 95 '(which are entirely preserved), respectively, in the form of roughly brackets, and secondly the second circumferential ends 94, 113a, This circumferential end portion is modified as described later.

The heat sink 9 and the first ends 95, 95 ′ of the connector 113 overlap.

The heat sink 9 has a projection 217 adjacent to the bracket 95, which has a chimney 117 'for mounting a connection terminal 117 called blind terminal B +, which connection terminal. Is connected to the positive terminal of the battery via a cable. The terminal 117 is here a screw as described in document FR 2 807 583, the head of which is polygonal, square or rectangular or has at least one flat. Thus, the base of the chimney 117 'and the protrusion 217 are mated to accommodate the head of the screw in shape interaction.

As will be described later, the heat sink 9 is modified between its first circumferential end 95 and the second circumferential end.

2 to 11, the second circumferential end 94 of the heat sink is in the form of a flat bracket and the heat sink 9 has a terminal 117 adjacent to the overlapping brackets 95, 95 ′. Corrected between the brackets 94. This terminal 117 is here oriented in the axial direction, ie perpendicular to the shield of the heat sink 9.

In FIG. 13 the terminal 117 is oriented radially and is adjacent to the second circumferential end of the heat sink.

This heat sink is then modified between the radially oriented terminal and the first circumferential end 95 of the heat sink 9.

The connector 113 here has an electrical conductor in the form of a metal track, and also makes electrical connection with the track of the voltage regulator via visible parts 145, 146, as described in document FR 2 754 654. And bracket 143 adjacent to bracket 95 '. In addition, the adjuster has first and second fixing brackets, which include a screw chimney (not shown) near the second circumferential end 113a of the heat sink 9 and the connector 113. An electrical track is provided for each electrical contact.

The connector 113 and the heat sink 9 are fixed to the plate 3 at three points by the fixing member 115, the fixing members having aligned holes 115 ', respectively formed in the heat sink and the connector, respectively. 123). These members may be studs as shown in FIG. 1, or in one variant may be rivets or bolts. In this case, the member is composed of a screw (115).

For this purpose, the plate 3 holds the voltage regulator by means of three protrusions (in the form of screw chimneys) and screws in the second bracket and the bracket 143 for screwing into the screw 115. Have two other chimneys locally.

The visible chimneys associated with brackets 143 and 95 and chimneys dedicated to the second bracket of the regulator are not given the reference numerals in the drawings.

The screw is screwed into the associated thread chimney of the plate 3 and is supported by its head at the relevant part farthest from the plate 3.

One of these screws 115 bears through its head to the first bracket of the regulator and passes through the holes of this first bracket that are aligned with the holes 115 ', 123. As shown in FIG. 1 of document WO 02/093717, the connector is provided with an axial protrusion for local contact with the plate 3. Here, the bottom surface of the connector 113 facing the plate 3 has several protrusions (in the form of cylindrical pins) for local contact with the plate 3. Therefore, the connector 113 is in a position higher than the plate in a state axially separated therefrom in parallel with the plate 3.

In one embodiment, the lid 27 of FIG. 1 is held fixed by snap coupling the heat sink 9 and the fixing stud 115 of the connector 113 to the plate of the rear bearing housing 16.

In another embodiment, the lid 27 has a transverse collar to be fixed to the bearing housing 16 in a conventional manner, for example by means of the screw 29 of FIG. 1.

2 to 11 show a scheme (described below) in which the stud 115 is replaced with a screw and the lid 27 is snapped and fixed to the connector 113.

This cover 27 is electrically insulating, here made of plastic material, which gives the molding the required shape.

2 to 13, the apparatus 1 of the present invention is provided in place of the apparatus of FIG. The device 1 comprises three pairs of current rectifying elements, ie three first diodes 8 and three second diodes 10. Each of these diodes 8, 10 is provided with a knurled cylindrical body and a tail, which constitute terminals for making electrical connections with each of the heat sink 9 and plate 3. The tail portion constitutes another terminal for electrical connection with a network of electrical conductors belonging to the connector 113.

The first diode 8 is called a positive diode because the positive heat sink 9 is adapted to be connected via the terminal 117 to the positive terminal of the battery of the vehicle, while the second diode 10 is negative. This is because the plate 3 and its bearing housing 16 constituting the negative heat sink are connected to the ground called B- and so to the negative terminal of the battery. Therefore, the metal bearing housing 16 constitutes a negative heat sink.

The network of electrical conductors (here, in the form of metal tracks) of the connector 113 is characterized by the phase winding of the stator coil (marked "23" in FIG. 1) at the tail of the pair of diodes 8, 10. 23 ′), an apparatus for forming a connection between the heat sink 9 and the plate 3 and rectifying the alternating current with direct current, as shown schematically in FIG. (1) will be implemented.

The metal rear bearing housing 16 constitutes a support for the negative diode 10, each of which is press fit into an associated inclined hole in the plate 3 with its knurled body and a positive diode ( The knurled body of 8) is forcibly fitted into the inclined holes 8 'in the heat sink 9, respectively.

The diode 10 is cooled in conduction and also convection by a bearing housing 16 (here made of aluminum or in one variant magnesium). The heat sink 9 (here metal) and diode 11 are cooled convection mainly.

The diodes 8, 10 are mounted in opposite directions to reduce the axial space requirement. Advantageously, the tail 111 of the positive diode 8 has an air inlet opening 7 in the plate 3 in the form of a rough shield having a size larger than the heat sink 9 for better cooling. Enter The tail 111 of the diode 10 is directed towards the heat sink 9 in the axially opposite direction.

In one variant, the tails 111 are shorter and do not enter the opening 7. Therefore their tails are in all cases opposite these openings 7 so that they are well cleaned by the circulation of air generated by the rotation of the fan 104 in FIG. 1.

This heat sink 9 is here made of a castable material so that the desired shape can be easily obtained. Here, the heat sink is made of aluminum or, in one variant, made of magnesium. It is also possible to machine the heat sink 9 as a whole, so in one variant the heat sink 9 is made of copper.

The heat sink 9 has a body in the form of a shield, which is parallel to the body of the connector 113 (in the form of a shield).

2-4, the cylindrical web for mounting the bearing 106 of FIG. 1 can be seen as "6" and the perforated cap associated with this bearing is shown as "60". The rectangular opening 7 (approximately trapezoidal here) is made by the web 6 on the inside, by two arms on the side (not shown) and by the peripheral material of the plate 3 on the outside ( The body of the diode 10 is mounted). The openings 7 here are of different sizes in the circumferential and radial directions, with one diode tail 8 per opening 7 provided. This depends on the shape of the opening 7 in the bearing housing 16. Thus, in one variant, two diode tails 8 can enter the same opening 7 thus formed.

As will be described below, the connector 113 (FIG. 8) includes a heat sink 9 including a modification of the position of the positive diode 8 relative to the hole 111 'that allows the rear end of the negative diode 10 to be accessible. The shape is corrected.

In one embodiment, for access to the air inlet opening 7, the inner annular part of the connector with a wide opening of the kind shown in FIG. 7 of document WO 02/093717 is retained.

In another embodiment, this inner annular portion with a wide opening is omitted for better cooling of the first diode 8, reduction of material consumption and better access to the opening 7. This connector 113 is more economical and simple, has a reduced size and is also more compact, lighter and well ventilated. Therefore, according to one feature, the inner periphery of the heat sink 9 is on the opposite side of the air inlet 7 to a greater extent.

The body of the connector 113 (FIG. 8) is made of an electrically insulating material (here plastic), which is embedded with a network of electrical conductors (flat here and made of aluminum or copper in one variant). . These conductors can be seen locally at "114 ", " 134 ", " 142 ", " 145 " and " 146 ", i.e. they are not covered, so that the output of the winding on the stator, the tail of the diode 10 ( 111, the trailing end of the diode 11 and the track of the voltage regulator as described above, respectively.

The uncovered portions 114, 134, 142 are approximately in the form of angle members and each comprise a transverse base in the plane of the body of the connector 113. This base enters the body of the connector 113 at one end thereof and extends to the protruding fixed end at the other end, which is approximately perpendicular to the body of the connector 113.

This body has one through hole 122 (here cylindrical) for the rear end of the positive diode 8 and three through holes for the member 115 for fixing the heat sink 9 to the plate 3. 123 (here cylindrical) and two holes 124 (here radially rectangular in shape) for access to the two trailing ends 111 of the negative diode 10. Therefore, the number of the holes 122, 124 (closed here) is reduced.

Each hole 123 belongs to a protrusion 223 which the body of the connector 113 has locally, and the body also has a protrusion lower than the protrusion 223 as shown in FIG. 8.

One of the protrusions 223 belongs to the bracket 95 '.

Hole 122 is dedicated to angle member 142, and each of the two holes 124 is dedicated to angle member 134.

Therefore, the base of the single angle member 142 enters the hole 122, and each of the bases of the two angle members 134 enters one of the two holes 124.

Two angle members 142 and one angle member 134 are located around the inner side of the connector 113.

In Figures 2 and 4 only two fastening screws 115 are visible, as described above because the third screw 115 has a voltage regulator / brush holder assembly (not shown), a heat sink 9 and a connector ( This is because it is for fixing the 113 to the plate 3 locally in the brackets 95 and 95 '.

For this purpose, the bracket 95 'of the connector has a hole 123 and a protrusion 223. This bracket 95 'has a shape corresponding to the shape of the bracket 95 of the heat sink 9 having a hole 115' for the passage of the screw 115, the screw having a first hole in the regulator. Also pass through the drilled bracket. The holes 123, 115 ′ and the holes of the first bracket of the regulator are axially aligned.

The brackets 95, 95 ′ and the regulator are secured with electrical insulation via the connector 113. The bracket 95 of the heat sink 9 is interposed between the bracket 95 'of the connector 113 and the first bracket of the regulator. The bracket 95 is supported by the protrusion 223 of the bracket 95 '.

  As can be seen in FIGS. 2-4 and 11, the connector 113 and the heat sink 9 are arranged in parallel, ie stacked in the axial direction. The connector 113 is connected between the plate 3 and the heat sink 9 in the axial direction to provide electrical insulation between the heat sink 9 and the plate 3 (these are at different potentials) through its body. It is interposed. The connector 113 and the heat sink 9 are in local contact at three points on the plate 3 locally, the plate having chimneys threaded in the manner described above for this purpose. The bodies of the connector 113 and the heat sink 9 are parallel to each other.

Thus, the major surface 247 (FIGS. 8 and 9) of the body of the connector 113 farthest from the plate 3 has three projections 223 (each with holes 123 for the passage of the screw 115). At three points), it is in local contact with the bottom surface of the body of the heat sink 9 facing the plate 3.

One of these protrusions 223 belongs to the bracket 95 'of the connector 113. The other of these protrusions 223 is adjacent to the second circumferential end portion 113a. The other protrusion 223 is in an intermediate position in the circumferential direction. According to one feature the inner surface of the heat sink 9 is made smoother as a whole.

Therefore, according to one feature, a gap, which can be seen more clearly in FIG. 11, exists between the bottom face of the heat sink 9 and the top face 247 of the connector 113. The size of this gap depends on the height of the protrusion 223. This gap allows air to pass through, and according to one feature, this gap allows air to pass between the connector 113 and the bodies of the heat sink 9 (in the form of a shield). At least one outer hole 300 is formed around the outside of the heat sink to improve cooling of the diode 8.

Several outer holes 300 are provided. Each hole 300 is bounded by an inner perimeter of the peripheral walls 91 to 93 of the heat sink 9 which protrude outwards. These walls 91 to 93 are located around the outside of the heat sink 9. The walls extend outside the diode on the opposite side of the diode 8. These walls are wider in the circumferential direction than the diameter of the hole 8 'for mounting the body of the diode 8 (Figs. 5 and 6).

Each hole 300 is narrower in the circumferential direction than the peripheral wall connected thereto. This hole extends outside of the area for mounting the positive diode 8.

Therefore, at least one strip material is present between the area for mounting the diode 8 and the associated peripheral walls 91 to 93 for dissipating the heat of the conduction furnace. Thus, according to one feature, the material is continuous between the first current rectifying element and its associated opposite peripheral wall.

According to one feature, each of the walls 91 to 93 belongs to cooling cells A, B and C (FIGS. 2, 5 and 11), each cooling cell comprising a first current rectifying element 8 and A hole 300 associated with this wall. Each cell on the side is bounded by a pair of transverse walls 191-191 ', 192-192', and 193-193 'that protrude outwards, and these transverse walls are inward from the outer periphery of the heat sink 9. To the periphery. According to one feature, the cells are blocked but open around the inside of the positive heat sink 9.

According to another feature, there is a free space between two consecutive cells, here A, B and B, C, respectively. Thus, as described below and as can be seen in FIGS. 2 to 6, 11 and 12, there is an air passage (here in the transverse direction) between two opposing transverse walls of two consecutive cells.

More specifically, each transverse wall of the cell is connected to one of the circumferential ends of the associated peripheral wall at its outer periphery. In this way, each cell is bounded by a protruding pattern formed by the material of the region for mounting the corresponding positive diode 8 belonging to the body of the heat sink 9 (in the form of a shield) and a circumferential wall. It is bounded by two transverse walls. Each pattern and so each cell is blocked but open around the inside of the heat sink 9, which is wavy to suit the presence of the air inlet opening 7.

As shown in FIGS. 2-6 and 11, the distance between the transverse walls of the same cell is such that the diode can be located around the inside of the heat sink 9 in the diameter of the hole 8 ′ for mounting the diode. Depends.

In a configuration where there is one outer hole 300 per cell, at least one strip material exists between one of the transverse walls and the hole 300.

To further improve heat exchange, at least one of the cells A, B, C is provided with at least one inner cooling fin around its inner side. This inner periphery projects inward with respect to the inner periphery of the heat sink 9.

In one embodiment, the inner cooling fins of the cell are separate from the lateral wall of the cell.

Thus, at least one of the cells comprises at least one supplemental inner cooling fin 200 protruding radially inward with respect to the inner periphery of the heat sink 9, the first current rectifying element 8 of the cell. Is located between the outer hole (s) 300 and the inner pin 200.

In one embodiment, at least one of the transverse walls of the at least one cell extends radially inwardly to form an inner cooling fin on the opposite side of the opening 7 and to aid in the discharge of heat in convection.

Advantageously, for even better cooling, each lateral wall of the at least one cell extends inwardly in the direction of the opening 7 to form an inner fin for even better cooling.

In the embodiment shown, all cells have transverse walls extending inwardly.

The inner fin extends to protrude inward with respect to the inner periphery of the heat sink.

The first cell A is closest to the first circumferential end 95 of the heat sink and the third cell C is closest to the second circumferential end of the heat sink.

Each of these two holes is here drilled for the passage of the fastening screw 115. The second cell B is located between the two cells A and C in the circumferential direction.

2 to 11, the first cell A is closest to the terminal 117 adjacent to the first circumferential end 95 of the heat sink, and the third cell C constituting the end cell is a heat sink ( Adjacent to the second circumferential end 94 of 9), the second circumferential end here is in the form of a flat bracket having a hole 115 'for the passage of the fastening screw 115.

As can be seen in Figures 5 and 6, the cells have different shapes, which depends on their position on the heat sink. Here, cells A and B are narrower than cells C around their inner periphery.

This third cell C comprises a wavy transverse wall 193 ′, forming a recess for the head of the screw associated with the bracket 94. This reduces the circumferential size of the heat sink.

The hole 300 extends outside of the first diode 8, which has a large amount of material in the cell due to the presence of the hole 300 (FIGS. 5 and 6). It is located close to the inner periphery.

Compared to the embodiment shown in FIGS. 4 to 6 of document WO 02/093717, all diodes 8 are located around the inside of the heat sink, and all the holes 300 are around the outside of the heat sink 9. Is located. Accordingly, the connector 113 is configured as described later.

Thus, there is material between the inner periphery of these holes 300 and the body of the diode 8.

At least two outer air passage holes 300 of small size and in quadrilateral shape are advantageously associated with at least one cell.

By the presence of at least two outer holes 300 which are smaller in size and smaller in the circumferential direction than the associated peripheral wall, the mechanical strength of the heat sink 9 can be better with good air passage.

In the embodiment shown, at least two holes 300 are associated with each cell.

Thus, at least two outer holes 300 are associated with each peripheral wall 91-93. These holes are separated by strip material, which extends from the associated peripheral walls 91 and 93 to the material of the region in which the body of the diode 8 including the hole 8 'is mounted.

Due to the material of the region for mounting the strip material and the body of the diode, heat can be conducted to the conduction through the heat sink 9 connected to the cable of the battery constituting the low temperature part via the terminal 117. .

These at least two holes also prevent the build up of water, in particular brine or any other dirt, especially on the walls 91 to 93 so that the heat sink is well cleaned.

In one embodiment, the two holes of the cell are away from the lateral wall of the cell.

Here, each of the two holes is advantageously also bounded by the lateral wall of the cell for better purification and better heat dissipation. These transverse walls constitute an inwardly directed outer cooling fin.

To further improve the cooling of the diode 8, at least one additional outer fin 400 is provided in at least one of the cells around the outside of the heat sink 9. The pin 400 delimits the hole 300 from the side and is separate from the transverse wall.

4 and 5, several outer fins 400 are provided per cell. These pins 400 partially delimit the holes 300 laterally. These fins increase heat exchange convectively and, in the embodiment shown, extend into the area for mounting the body of the diode 8 to better dissipate heat. The pin 400 belongs to a strip material that separates two consecutive holes 300.

To further improve heat exchange, two or more holes 300 are provided per wall 91 to 93 and two or more additional fins 400 are provided.

5 and 6, four holes 300 and three outer pins 400 are provided per wall 91 to 93. Two of these holes are also bounded by the transverse walls of the cell.

According to one feature, at least one additional inner cooling fin 200 protruding radially inward with respect to the inner peripheral wall of the positive heat sink 9 is located at the inner periphery of at least one cell of the heat sink 9. have.

The inner fin 200 is separate from the lateral wall of the cell. In one variant, the transverse wall of this cell does not have an inner fin, so that cell has at least one additional inner fin 200.

Here, several inner pins 200 are provided per cell.

Each of these fins 200, which are separate from the lateral wall and protrude inwards relative to the inner periphery of the heat sink 9, have holes 8 'and their first diodes to cool the first diode 8 even more. It is located in series underneath.

As can be seen in FIGS. 5 and 6, the inner fin 200 and outer fin 400 and the transverse and peripheral walls are shaped according to the position of the cells in the heat sink.

In these figures, the number of outer fins 400 and holes 300 (three outer fins 400 and four holes 300, respectively) is determined for the first cell A and the second intermediate cell B. FIG. It is larger than the number (two) of the inner pins 200.

In one embodiment, the third cell C comprises the same number of holes 300 and fins 400, 200 as the cells A, B.

In the embodiment shown in the figure, the number of inner fins of the third end cell C (here four) is increased to better cool the last diode 8 adjacent the lug 94 and the outer fins ( The number of holes 400 and 300 is the same as that of the other cells.

As will be appreciated, each cell is configured according to the application and the first cell A is the coldest. In one embodiment, this cell A has fewer outer fins and / or inner fins than the other cells B and C. It may not have an inner pin and / or an outer pin.

The number of pins 200, 400 and holes 300 depends on the temperature at which the corresponding diode 8 reaches. By defining these parameters and the length of the pins, one can better control the temperature of the diode 8 and also make the temperature more uniform between one diode 8 and the other.

For the connector 113, an angle member 114, which is called a visible hook, is located protruding around the outside of the connector 113, and is connected, for example, in a star shape by its end fixing coil (FIG. 12). The output part 214 of the winding 23 'of the phase of 23 is fixed. Each end fixture is raised and can be folded to form a clamp for crimping the output 214 of the winding 23 ′ uncoated on the open arms for electrical contact. It is in the form of a roughly U with an open arm. Therefore, three crimping hooks 114 are provided. In one variant, the output 214 of the winding 23 ′ is fixed to the fixture of the hook 114 by soldering.

The visible angle members 134, 142 include fixtures mounted in opposite directions, each of which is adapted for local contact with the trailing portion of each of the negative diode 10 and the positive diode 8. Folds are provided. Fixing the tail of the diode to the fold at the end of the angle member here is done by soldering or crimping, such as using the hook 114 in one variation.

The two end fixings of the two angle members 134 enter the associated closed access holes 111 ′ of the heat sink 9 in the axial direction, which is at least one of the terminals of the second diode 10 (here Coincides with the hole 124 of the connector 113 for access to the rear end 111. The angle member 134 passes through the hole 111 '. Here, the holes 111 ', 124 are rectangular in shape with two parallel side edges in the radial direction (Figs. 5, 6 and 8). Therefore, according to one feature, the heat sink 9 has fewer holes 111 'than the number of negative diodes 10, and two of the diodes 10 are access holes 111' that are grouped in pairs. , 124).

Holes 111 ′ and 124 for access to angle member 134 and diode 10 extend around the outer periphery of heat sink 9 and connector 113. Since the diodes 8 are all located around the inside of the heat sink 9, they are biased outwardly and circumferentially with respect to the hole 8 ′ and the angle member 142.

According to one feature, the third angle member 134, which is called an end angle member for fixing the tail 111 of the end diode 10, is held by the second circumferential end 113a of the connector 113. , Because its base enters the second end 113a. According to one feature, this end angle member 134 does not enter a hole in the positive heat sink 9. It is biased in the circumferential direction with respect to the second circumferential end 94 of the heat sink 9 in the form of a flat bracket with a hole 115 '.

According to one feature, as can be seen in FIG. 6, the positive diode 8 is interposed between the brackets 94, 95 in the circumferential direction, or more precisely, between the terminal 117 and the bracket 94. It is interposed.

The diode 8 held in the body of the heat sink 9 is located between the connector 113 and the second ends 113a and 94 of the heat sink 9 and the bracket 143 of the connector in the circumferential direction.

According to one feature, the heat sink 9 has a smaller circumferential length of the connector 113. The second circumferential end portion 113a of the connector 113 extends in the circumferential direction with respect to the bracket 94 of the heat sink 9.

One of the diodes 8 is adjacent to the fixing bracket 94.

The heat sink 9 is more compact in the circumferential direction than in FIG. 5 of document WO 02/093717. Therefore, this heat sink is lighter.

Therefore, the end angle member 134 is released with respect to the heat sink 9 and also with respect to the body of the connector 113, because the end angle member projects inward with respect to the inner periphery of the body of the connector 113. This is because the base and the fixing part protrude in the axial direction in the opposite direction of the plate 3. The end portion 113a is reduced in width at this angle member 134.

The fixing portion of the angle member 142 faces in the direction of the air inlet opening 7. Depending on their length, these fixings may or may not enter the opening 7.

According to one feature, the other two angle members 142 have a base projecting inward with respect to the inner periphery of the body of the connector 113. Therefore, these angle members 142 are released and extend on both sides of the intermediate angle member 134 mounted to the hole 124. Therefore, the hollow inner periphery of the connector is wavy and the material at the second end hole 124 located between the hole 123 adjacent to the second end 113a and the two angle members 142 released. It is added. As a result, as can be seen in FIG. 8, the inner periphery of the connector 113 is waved between the end 113a and the released angle member called the released first angle member furthest away from the end 113a. In form.

The inner perimeter of the body of the connector 113 also has a portion that is approximately straight between the bracket 143 and the released first angle member 142 on the opposite side of the hook 114. The body of the connector 113 is reduced in thickness at this point (FIG. 8).

The body has a hollow portion that is approximately semi-circular in this first angle member 142 and also has another hollow portion that is approximately semi-circular also between the hole 123 adjacent to the end 113a and the second end hole 124, These hollow portions form part of the wave shape.

Thus, in order to release the body and the holes 8 'of the two diodes 8 closest to the second end 113a of the connector 113 to the maximum extent possible, the required rigidity can be given to the connector 113 and It is also possible to leave the space in an approximately semicircular shape in two hollow parts.

Therefore, the inner periphery of the connector has two recesses that allow at least much access to the bodies of these two second diodes 8.

A hole 124 adjacent to the hole 122 is interposed between the hole 122 and the bracket 95 'in the circumferential direction and is deviated in the circumferential direction with respect to the hole 122.

The wavy inner periphery of the connector 113 is released to the maximum at the opening 7 of the plate 3. Thus, it is possible to cool the positive diode 8 farthest away from the terminal 117, and the area adjacent to the terminal 117 in the heat sink 9 is the coldest, because this terminal, called the B + terminal. 117 is also intended to be connected to the positive terminal of the battery of the vehicle via a cable that exhausts heat in the furnace.

Therefore, the diode 8 closest to the terminal 117 is the coldest and the diode 10 is the colder because it is cooled by a bearing housing 16 having more material than the heat sink 9. Because.

Therefore, the connector 113 is adapted to the shape of the heat sink 9. This connector is more well ventilated than the prior art while maintaining its function on the brackets 143, 95 '. In this embodiment the body of the connector 113 is trimmed around the inner side between the hole 122 and the second circumferential end 113a. Therefore, this body allows more air passage to cool the heat sink 9 better. This body is lighter and more economical.

Compared with the prior art, heat sink 9 and connector 113 are not modified at their circumferential ends, including brackets 95, 95 ′ and 143. The material of the body of the connector 113 and the number of holes 122 and 124 are reduced.

One of the holes 124 is closer to the brackets 95, 143 than the hole 122 and vice versa in the document WO 02/093717 (FIG. 7).

Therefore, in the embodiment of FIG. 8, the angle member 134 for fixing the rear end 111 of the negative diode 10 is connected to the connector 113 with respect to the angle member 142 for fixing the rear end of the positive diode 8. ) Is biased in the circumferential direction in the directions of the second circumferential end portion 113a and the first circumferential end portion 95 '. One of the angle members 134 is closer to the brackets 95 'and 143 than the angle member 142 and the last angle member 134 is closer to the second end 113a than the angle member 142.

The angle member 142 is located between the two holes 124.

As a result of the above, the heat sink 9 includes two holes 111 'associated with the holes 124, respectively. Among these holes 111 ', the first hole for access to the terminal 111 of the corresponding second diode 10 has a chimney 117' in the circumferential direction than the hole 8 'and the first diode 8; Closer to terminal 117 (and thus to bracket 95). This first hole 111 ′ is located between the terminal 117 and the first cell A in the circumferential direction. Of these holes 111 ′, the second holes for access to the terminals of the other second diodes 10 are the two first diodes 8 and the two holes 8 farthest from the terminal 117 in the circumferential direction. Is also located between the two cells (B, C). Therefore, this second hole 111 ′ belongs to the bottom of the air passage existing between two opposing transverse walls of the continuous cell C, B, as can be seen, for example, in FIGS. 5 and 6.

The intermediate through hole 115 'of the fixing member 115 is located between the hole 8' of the intermediate diode 8 and the hole 8 'of the intermediate diode 8 closest to the terminal 117 in the circumferential direction. do. This hole is located between the opposing transverse walls 191 ', 192 of the cells A, B in the circumferential direction and is therefore easily accessible. This hole 115 'is provided at the bottom of the air passageway between the two opposing transverse walls 192 and 191' of the continuous cells B and A, as can be seen, for example, in FIGS. 5 and 6. Belong.

The other two holes 115 'belong to bracket 94 and bracket 95, respectively.

With this configuration, the screw head is particularly accessible in the middle hole 115 'thanks to the air passage between the two cells C, B, so that the screw can be fixed simply and quickly with a screw driver. There is enough room to pass the screwdriver.

According to one feature, all the holes 115 ', 111' and 8 'are biased relative to one another in the circumferential direction.

With all these configurations, the circumferential length of the connector 113 and the heat sink 9 can be reduced, and according to one feature, these connectors and the heat sink become more compact in the circumferential direction.

The connector 113 of FIG. 8 has two protruding positioning pins 97, each of which engages a cylindrical hole 97 'provided around the outside of the metal heat sink 9 (FIG. 4 and FIG. 5).

Thus, according to one feature, the connector 113 is positioned in an angular direction with respect to the heat sink 9 such that the holes 115 ', 123 are aligned and the trailing portion 111 enters the hole 111'.

One of the holes 97 ′ is bounded by two outer fins 400 of the intermediate wall 92 and the second cell B. This hole is a substitute for one of the outer holes 300. The other hole 97 ′ is adjacent to the terminal 117.

The fastening member 115 (screw here) passes through the aligned openings 115 ′, 123, for this reason to insulate the fastening member 115, which is screwed into the plate 3, with respect to the heat sink 9. An electrically insulating sleeve 215 is fitted in the opening 115 ′. Here, the sleeve 215 has a change in diameter, so that the head of the screw 115 can be supported in the portion where the diameter changes.

Of course, the sleeve 215 can be maintained as in FIG. 1 and can also use fastening studs.

In all cases, as can be seen in the figure, there is in particular enough space for the sleeve 215 to fit between the cells A and B.

The largest diameter size of the sleeve allows the screwdriver to pass through.

The protrusion 223 also has a collar (not shown), with each collar entering the hole 115 ′ to supplement electrical insulation with respect to the sleeve 215.

As in FIG. 1, the bottom surface 246 of the connector 113 closest to the plate 3 has a local diameter change to partially surround the associated chimney of the plate 3.

In the figure, the studs are replaced with screws 115 and the lid 27 is economically fixed by snapping into the connector 113.

To this end, the body of the connector 113 (FIG. 8) has two protrusions 148 around its outer periphery, each of which is provided with a U-shaped recess 144 and a flat protrusion 147. The protrusions 148, 147 obtained by molding are outwardly directed. One protrusion 148 is located at the first circumferential end 95 ′ of the connector 113, and the protrusion 147 is located near the protrusion 223 and the end angle member 134. It is located at the circumferential end 113a.

The other protrusion 148 is located between the middle protrusion 223 and the two hooks 114 near the middle hole 115 ′, ie between the cells A and B in the circumferential direction.

Therefore, each of the protrusions 147, 148 is in the vicinity of the fixing hole 123 (the screw 115 passes), and thus near the protrusion 223 and the heat sink 9 and the connector 113. 3) is located near the point for fixing.

The lid 27 (FIGS. 7, 9 and 10) is hollow. Here the cover is made of plastic material, so it is electrically insulating. The cover has a bottom 228, which is oriented approximately transverse to the axis X-X in FIG. 1. This bottom 228 extends into the skirt 227 around its outside, which skirt is oriented approximately axially with respect to axis X-X in FIG. 1. Therefore, this skirt 227 is approximately perpendicular to the bottom 228.

As will be described later, the bottom 228 is drilled in the form of a grill so that the air flow through the heat sink 9, the connector 113 and the opening 7 can pass through. .

This lid 27 makes it possible to mold its plastic material to easily obtain the required shape.

Thus, in FIG. 7, a number of air flow passage openings 275 forming the grille and other openings 276 for cooling the voltage regulators can be seen. Reference numeral 271 denotes a housing for the brush holder, reference numerals 274 and 273 denote passages through the connector of the voltage regulator and holes for each of the terminals 117 held in the heat sink 9. .

The lid 27 has projections 272 (here three projections) for the passage and reception of the output 214 of the winding 23 'of the phase around its outer circumference, which is the plate 3 as shown in FIG. 1. The plate 3 is axially passed by the radial portion of the opening 5 which affects the outer periphery of the plate.

As mentioned earlier, this radial portion is enlarged as can be seen at 5 'in FIGS. 3 and 11.

In one variant, the output 214 passes through a specific hole in the plate 3.

The cover 27 is configured to interact with the protrusions 147, 148 to snap and secure onto the plastic bottom 246 of the body of the connector 113 facing towards the plate 3.

The protrusions 147, 148 are adapted to interact with the snap-fit lugs 224, respectively, with a hook 245 emerging from the skirt 227 of the lid 27 by molding (FIG. 9), the skirt being circumferential. Three lugs 244 spaced apart from one another in a direction (FIG. 10). Each lug 244 is axially oriented, and in the embodiments of FIGS. 9 and 10, at least one of these lugs is reduced in thickness with respect to the skirt 227 to achieve greater flexibility.

In one variation, the thickness of at least one lug 244 is equal to the thickness of skirt 227. In one variant, all lugs are reduced in thickness with respect to the thickness of the skirt 227 as shown in FIG. 9.

Each lug 244 (FIG. 10) emerges from the skirt 227 by molding and is shorter than this skirt in the axial direction. The lug is laterally bounded by a blind axial slot and at its feet is connected to a strip of lesser height than the skirt 227.

Hook 245 is thicker than lug 244 and constitutes the free end of lug 244. This hook 245 is bounded by a transverse face 248 adapted to contact the bottom face 246 of the connector 113 closest to the plate 3.

The hook 245 is also bounded by an end slope 249. When the cover 27 is mounted to the body of the connector 113, axial pressure is applied to the cover 27 (see axial arrow in FIG. 9) and the inclined surface 249 is the top surface 247 of the connector 113. And lug 244 is laterally deployed (see transverse arrow in FIG. 9) to enter recess 144 of protrusion 148 in FIG. 9.

As the lid 27 continues to move in the axial direction, the hook 245 passes over the bottom surface 246 and returns to its initial position.

Upon removing the force on the cover, the transverse face 248 of the hook 245 comes into contact with the bottom face 246, and the body of the lug 244 is recessed 144 of the protrusion 148 in FIG. 9. Will interact with the bottom of the.

The width of the lug 244 depends on the distance between the arms 344 which laterally delimits the U-shaped recess 144 in the protrusion 148 so that the lug can enter the recess 144. do. Similarly, the width of the blind slots delimiting the lug 244 is determined by the width of the arms 344 so that the arms can enter these slots.

Therefore, the arm 344 impedes the lug and thus cooperates with the bottom of the recess in the protrusion 148 to lock the lid 27 in a non-rotating manner.

With respect to the protrusion 147, the lug 244 comes into contact with the flat top surface of the protrusion, wherein the hook of the lug 244 is connected with the bottom surface 246 of the connector 113 via its transverse face 248. Will be combined.

The advantage is that the bottom surface 246 of the connector is axially biased relative to the plate 3 to accommodate the hook 245.

Lug 244 is preserved and has a length sufficient to bend.

The coefficients of expansion of the bodies of the connector 117 and the cover 27 (both made of plastic material) are approximately equal.

In one variant, the cover can be fixed by an air outlet opening 5 in the cover. In this case the hook 245 can interact with the inner side 301 (FIG. 9) of the plate 3 via its face 248. This solution is less satisfactory because the hook 245 is located near the coil end 39 in FIG. 1 so that the fixing of the lid is less reliable under heating.

In one variant, the fixing is made by snap-fitting the lid 27 with the lugs 244 with the heat sink 9 which is provided with the same kind of projection as the projections 147 and 148.

In one variant, two protrusions 148 are secured to the protrusion 147 and heat sink 9 in the connector.

This solution is less advantageous because the heat sink 9 is hotter than the lid 27.

According to one feature, the hollow shaped cover has three partitions 277 on the inside, each partition being located opposite the projection 272 which receives the output of the winding on the alternator coil (FIG. 10). Two of these partitions 277 are connected together in a V-shape at one of their ends. A lug 244 is interposed between the first end of the assembly consisting of these two inner partitions 277 and the third inner partition 277. Another lug 244 is located at the other end of the assembly, which consists of two compartments 277.

Therefore, the two inner partitions 277 that are V-shaped are located between the two snap engagement lugs 244 in the circumferential direction.

These inner partitions 277 are approximately perpendicular to the bottom 228 and are integrally molded with the plastic sheath 27. The inner partition is located inside of the skirt 227 on the outside of the opening 275, which skirt is approximately perpendicular to the bottom 228.

As can be seen in FIG. 8, the outer periphery of the connector 113 is partly bounded by four sides 149 of different lengths, which are first holes 124 closest to the bracket 95 ′. ) Extends to the protrusion 47. The first face 149 extends into a generally arcuate portion and ends at the bracket 95 'and includes a protrusion 148. This first face 149 adjacent to the first hole 124 is shorter than the other face and the fourth face closest to the protrusion 147, and the fourth face is longer than the other faces. The second protrusion 148 furthest from the bracket 95 'is located near the middle protrusion 223 at the connection point of the second and third faces 149.

The first face 149 is shorter than the other faces because each of these three other faces 149 is provided with a hook 114, which hook is perpendicular to its face 149 through its base. It protrudes outward.

Since the faces 149 can reduce the material of the body of the connector 113, the material of the body of the connector 113 is trimmed around its outer side.

The outer periphery of the heat sink 9 has a shape complementary to the outer periphery of the connector 113.

Thus, the plate of the heat sink 9 comprises four faces complementary to the faces 149, which extend from their brackets 94 to the vicinity of the first access hole 111 ′. To further reduce the material these four sides extend to an additional side up to the terminal 117 and an arcuate portion connected to the bracket 95. Each of the three peripheral walls 91, 92, 93 protrude outward with respect to the last three faces.

The first face of the heat sink 9 is shorter than the other faces, so that the first peripheral wall 91 of the heat sink is adapted accordingly. As can be seen in FIGS. 5 and 6, this wall has two parts: a second side of the heat sink and a first portion associated with the connector, and a shorter second portion associated with the first side and the connector of the heat sink. Has The second wall 92 and the third wall 93 are associated with a single face.

As can be seen more clearly in FIGS. 5 and 6, each of the three peripheral walls 91, 92, 93 has an axial extension of at least one side of the plate of the heat sink and the shield of the connector. The walls 91, 92, 93 are shorter in length in the circumferential direction than their associated face (s).

The partition 277 is high enough to come opposite the walls 91, 92, 93, which are less than the skirt 227. Partition 277 is longer than walls 91, 92, 93 and covers these walls.

Therefore, the heat sink 9 is compact like its connector 113 around its outer side.

Therefore, as can be seen more clearly in FIGS. 3, 4 and 11, the assembly consisting of the connector 113 and the heat sink 9 has a surface comprising the walls 91, 92, 93 around its outer periphery. And the fastenings of the hooks 114 are on opposite sides of these faces.

More specifically, the protrusions 148, 147 and the hooks 114 protrude outward with respect to the outer perimeter of the connector and the heat sink.

There is a space between the fastening of the hook 114 and the face 149 of the connector 113, which extends axially into the face and the associated walls 91, 92, 93 of the heat sink 9.

According to one feature, each inner partition 277 of the lid 27 is associated with the face 149 and the associated walls 91, 92, of the heat sink 9 with respect to the fixing part of the hook 114 which is not at the same potential. 93 is extended in one of the spaces to insulate it.

Therefore, each of the partitions 277 is parallel to the associated face of the assembly consisting of the connector 113 and the heat sink 9.

The partitions 277 are here oriented tangential to the circle passing through their centers.

Each of these compartments 277 follows the shape of the face of the associated connector 113 / heat sink assembly.

The partitions pass through the radial opening 5 '.

The base of the hook 114 here is perpendicular to the partition 277, and the fixing portion of the hook is approximately parallel to the partition 277. In one variant, the fastening of the hook is inclined at an angle of about 90 ° and at least 90 ° relative to the fastening.

Of course, firstly, the inner partition 277 has a height lower than the skirt 227 in view of the thickness of the base of the hook 114, and secondly, it is present between the face 149 and the opposing fixing of the hook 114. It has a thickness smaller than the space. Thus, each fixture of the hook 114 is insulated into the protrusion 272 to secure it to the output of the winding on the stator coil.

These partitions 277 are insulated partitions and prevent splashing of water, in particular brine or other dirt, into the assembly consisting of the heat sink 9 and the connector 113.

The protrusion 272 has a slot 281 for draining fried water, in particular brine or dirt, at its top.

The protrusion also has another slot 282 laterally for draining splashed water or dirt.

These plastic partitions 277 also electrically insulate the heat sink 9 and the fixture of the hook 114 that is close to each other and at different potentials.

These partitions 277, along with the peripheral walls 91, 92, 93 guide the circulation of air around the outside of the heat sink 9.

According to one feature, the partition also opposes the free spaces between the cells forming the air passage (here transverse), more precisely between the cells B, C with the second hole 111 ′ between them. Air circulation is also guided between the outer periphery of the walls 192 ', 193 and also between the outer periphery of the opposing walls 191', 192 of the cells A, B between which the intermediate holes 115 'are interposed.

For this reason, two of the inner partitions 277 are grouped together to form a V-shape and to follow the contour from the wall 92 of the second cell B to the wall 93 of the last cell C. .

The other partition follows the contour of the longest part of the wall 93, and the skirt 227 follows the entire contour of the remaining part of the outer periphery of the heat sink 9 on the opposite side of the first hole 111 ′.

In this way, the assembly consisting of the heat sink 9 and the connector 113, around the outside of it, saving extra parts or overmolding, in order to prevent the introduction of brine or other debris and to provide electrical insulation and air guidance. It can be kept compact.

The lid 27 cuts the strip material 278 of approximately L shape in its hole 273 for the passage of the terminal 117 to guide the air passage therein around the inside of the first hole 111 ′. Have inside.

The strip 278 emerges from the bottom 228 by molding. The strip has an end head and an inwardly facing inner portion, which extends with a foot facing in the circumferential direction.

The head of the strip 278 is connected to the skirt 227. This strip 278 delimits three openings 275, namely the edges of the outer opening, the middle opening and the inner opening. These openings 275 are located above each other in the radial direction. The inner portion delimits the aligned radial edges of the outer and middle openings 275. The foot of the strip 278 delimits a circumferential edge common to the middle and inner openings.

Thus, the air is guided so that the first air flow will pass through the outer and middle openings and the other individual air flow will pass through the inner openings. As can be seen in FIGS. 2-4, the outer and middle openings are located opposite the first holes 111 ′, which are opposite the associated holes 124 in the connector 113. Therefore, the tail 111 of the diode 10 located in these openings 111 ', 124 will be cooled well.

The height of the strip 278 is less than the height of the skirt 227.

Due to this strip 278, together with the transverse wall 191 of the first cell A of the heat sink 9, air is drawn from the first hole 111 ′ adjacent to the terminal 117. The air passages can be guided from the inside to sweep away.

This strip also reinforces the stiffness of the cover at terminal 117.

There is also a lug 279 emerging from the bottom 228 by molding to guide the air around the inside of the second open access life 111 '.

This lug 279 delimits the edge common to the middle and inner openings, such as the foot of the strip 278. These lugs are located around the inside of the heat sink between the diaphragm 192 ', 193 of the cells B, C facing each other.

The lug 279 is generally axially oriented, ie approximately perpendicular to the bottom 228.

The lug, together with the two opposite walls 192 ', 193 of the second and third cells of the heat sink, will guide the passage of air so that the air will properly sweep the heat sink through the second hole 111'. Can be.

The walls 192 ', 193 are approximately parallel to each other.

This configuration is advantageous because these walls delimit the transverse passage for passage of the electrode for soldering the trailing portion 111 of the second negative diode. Therefore, the electrode can move laterally, so that soldering becomes easy and the soldering speed is increased.

Another passage for the transverse passage of the soldering electrode is also present between the wall 191 and the protrusion 217 of the first cell.

The tail 111 of the end diode 10 is also accessible.

Therefore, the solution according to the invention facilitates the soldering of the trailing portion of the negative diode. This solution makes this soldering quicker and easier, and there are no obstacles that interfere with the transverse movement of the electrodes.

Of course, when fixing the rear end 111 of the diode 10 by crimping, this operation is facilitated due to the configuration of the heat sink and the connector.

The skirt 227 has a straight portion at the opening 274 to follow as closely as possible the shape of the assembly consisting of the voltage regulator and the brush holder. With this configuration, the lid is prevented from rotating.

The housing 271 is bounded by a wall 280 inside the lid 27, which follows the shape of the brush holder to sealably receive the brush holder. The opening 273 for the passage of the wall 280 and the terminal 117 also prevents the lid from rotating in interaction with the terminal 117 and the brush holder.

Air passage openings 275 are dispersed in three outer, middle and inner opening rows that are distributed above each other. As can be seen in FIGS. 7 and 10, each aperture column is bounded by two material rings oriented in the circumferential direction and a plurality of arms extending between the two material rings. In this way, the bottom of the cover 27 is in the form of a grill.

The outermost row of openings 275 allows air to access holes 111 ′, 124 and outer holes 300 and outer fins 400, as mentioned above. The outer hole 300 also reduces the weight of the heat sink 9.

The intermediate aperture train allows air to access the body and holes 111 ′, 124 of the positive diode 8.

The innermost opening row allows air to access the inner extensions of the transverse walls 191-191 ', 192-192', 193-193 'and the additional inner fin 200.

The innermost row of openings 275 is opposite the air inlet opening 7, inner fin 200 and inner extension of the transverse wall.

Peripheral walls 91-93, transverse walls 191-193 ′, outer fin 400 and inner fin 200 have the same height, so that small axial clearances to adequately guide the air passage cover 27. Is present for the bottom of.

In FIG. 1 air circulation occurs with rotation of the fan 104.

As mentioned earlier, this is due to the presence of the air inlet 7 and the local three-point contact between the heat sink 9 and the protrusion 223 protruding with respect to the top surface 247 of the body of the connector 113. It is possible through.

The heat sink 9 has two small outer rigid reinforcement walls 98 around its outer side (FIG. 5), which are smaller in height than the walls 91 to 93, and also have second and third cells. The walls 91 of the first cell are connected to the projections 217 having the chimney 117 'for mounting the terminals 117 together. These small walls provide good heat resistance to the heat sink. These small walls 98 delimit the air passages between cells C and B and between cells B and A, respectively.

This heat sink 9 also has three small walls 99 for rigid reinforcement and heat resistance for the same reasons as the small wall 98 at its inner periphery, which wall comprises the protrusions 217 and the transverse walls of the first cell. 191, between the lateral wall 191 ′ of the first cell and the lateral wall 192 opposite the second cell, and finally between the opposing lateral wall 192 ′ of the second cell and the lateral wall 193 of the third cell. Each is located. Therefore, the long side of the body (in shield form) of the heat sink 9 (farthest from the plate 3) has walls 91, 93 and small walls 98, 99, which walls It protrudes perpendicularly to its top surface and extends in the circumferential direction where the boundary between the outer and inner periphery of the heat sink 9 is partially defined.

The small wall 99 delimits the passage between the cells C, B and the cells B, A from the inside.

The top surface of the shield of the heat sink 9 also has transverse wall pairs 191-191 ', 192-192', 193-193 ', an outer fin 400 and an inner fin 200, and these walls and fins It protrudes perpendicular to the top surface and extends laterally from the outer periphery of the shield of the heat sink 9 to the inner periphery.

In one variant, for example, the inner and / or outer fins or transverse walls and / or peripheral walls are inclined with respect to the top surface of the heat sink.

In all cases, the walls and fins extend outwardly with respect to the top surface of the heat sink, and do not increase the thickness of the heat sink as a whole, but are small in size with respect to the diode being forced into the hole 8 '. For a fan having an alternator of and having an outer diameter of 82 to 92 mm (approximately the outer diameter of the rotor of FIG. 1), the thickness of the heat sink can be 3 to 5 mm.

In one variant, as described, for example, in document FR 2 734 427, the diode may be brazed to the heat sink and / or plate 3, so that the body of the diode does not necessarily need to be kneaded and also The hole 8 'does not necessarily have to be present either.

In this case, the thickness of the heat sink 9 is approximately 1 to 3 mm.

Therefore, in the case of a fan having a small alternator and an outer diameter of 82 to 92 mm (approximately the outer diameter of the rotor of Fig. 1), the thickness of the heat sink is 1 to 5 mm.

The solution shown in the figure is optimal.

Thus, the temperature at which the end positive diode (which is the highest temperature and closest to the bracket 94) reaches is 8 ° C. lower than the prior art solution for an ambient temperature of 105 ° C.

The end diode is advantageously an economical diode which does not exceed its critical temperature (215 ° C.).

More specifically, this critical temperature of 215 ° C. allows permanent magnets to close between these claws 68 and 70 to reduce magnetic leakage and increase the power of the alternator, as in document FR 2 905 806. It corresponds to the case provided with a rotor.

Of course, the present invention can also be applied to larger alternators.

With the present invention, the positive diode cools well and there is a tradeoff between mechanical strength, material cost and heat exchange surface.

In addition, the heat sink is particularly breathable by the holes 300, which makes it easier to fix the tail of the negative diode, in particular by soldering, and also between two consecutive cells and between cell A and terminal 117. The space present also facilitates screwing the screw.

In addition, the inner partitions 277 of the hollow-shaped cover, along with the strip material 278 and the lug 279 located between their partitions 192 ′, 193, around their inner circumference, have a trailing edge of the diode 10. This allows good guidance of air flow at (111).

The inner partitions 277 are adapted to the shape of the face of the connector / heat sink assembly and each extend on one side of the hook.

The partition and associated face are here straight.

The lid does not have an extension that enters the passage opening of the image output portion formed in the plate 3 and is therefore simplified. The same is true for connectors.

The cell heat sink also satisfies the requirements of various automotive manufacturers and makes it easy to apply this approach when the terminal 117, called the B + terminal, is oriented radially as shown in FIG.

In this case, the cells A, B, C and the first circumferential end 95 of the heat sink 9 are held. This heat sink 9 extends at its first circumferential end, so near the second circumferential end the heat sink has a radially oriented chimney 217 ′, It relates to a supplementary fixation point formed by the same type of perforated bracket as the bracket 94 of FIGS. 5 and 6 constituting the second circumferential end.

This replenishment fixation point is formed by this perforated bracket and the threaded replenishment chimney 600 of FIG. This fastening is effected by screws 115 and supplementary insulating sleeve 215 as in fastening of bracket 94.

Therefore, the plate of the bearing housing of FIG. 11 is suitable for various applications.

The chimney 217 'is adapted to mount the connecting terminal 117 of the previous figure, which terminal is radially exited from the radial chimney 217'. The terminal 117 here is screwed as mentioned above, the head of which is polygonal, square or rectangular or has at least one flat part. The base of the chimney 217 'is thus adapted to receive the head of the screw in a cooperative manner.

2 to 11, the bracket 94 extends into a portion 294 having a radial chimney 217 ′, which ends in a perforated fixed bracket of the same type as the bracket 94.

In this case, the heat sink includes four fixing points, and the second end 119a of the connector extends outwardly below the portion 294 and has a protrusion 148.

In this case, the heat sink 9 is longer than the connector 113 in the circumferential direction. In this embodiment, the positions of the angle members 134 and 142 do not change, and also the positions of the brackets 95 'and 143 do not change. This also applies to the inner periphery of the connector 113.

In all cases, the heat sink 9 has a first circumferential end 95, where this end overlaps the first circumferential end 95 ′ of the connector 113, the heat sink 9 of the cells. The cell C (referred to as the end cell) closest to the second circumferential end of) includes a larger number of make-up fins 200 than other cooling cells.

This cell (C) has a wavy transverse wall (193 ') which screws the screw (115) by a through hole (115') formed adjacent to the transverse wall (193 ') in the heat sink. It is for.

Of course, this invention is not limited to embodiment described.

Thus, in one variation, the surface of the heat sink / connector assembly may have a different shape.

All faces in this assembly do not necessarily have a straight shape. Thus, the at least one face may have a convex arch shape, ie it may have a curved shape. In this case, the associated partitions have a concave shape that is complementary to the convex surface, that is, a curved shape.

The concave shape of the inner partition is easily obtained by molding. Therefore, in one variant, at least one of the cells, such as cell A, comprises an arcuate peripheral wall of convex shape.

Therefore, all inner partitions 277 need not necessarily have the same shape.

The hooks 114 do not necessarily all have to be in the form of angle members. Everything depends on the shape of the phase output 214, which may be somewhat inclined.

In one variant, the number of current rectifying element pairs is at least three, such as four, so that in one variant the heat sink has four cooling cells.

In one variation, the strip material 278 is partially removed while maintaining only its circumferential portion, and the transverse wall 191 is formed to form a second passageway, such as a passageway between the partitions 192 ', 193. Is added parallel to.

In one variation, the visible portions 134, 142 have other shapes. For example, the end fixtures of these parts are inclined with respect to the base of these parts in one variant. In one variant, the base is aligned with the end.

In the figure, the length of the tail portion of the diode is the same. In one variant, the trailing ends of the diodes are of different lengths.

In one variant, at least one of the diode 8, 10 pairs has no tail, so that the visible portions 134, 142 are thus extended and formed accordingly.

In one variant, the diodes 8 and / or 10 are brazed and fixed to the heat sink 9 and the plate 3, respectively, as mentioned above.

In the figure the diode 10 is held directly on the plate 3. In one variant, as described, for example, in the documents EP 1 4860 750 and US 2004/0051409, the diode 10 is mounted in an annular part fixed to the plate 3 and held indirectly on the plate.

Therefore, the hole for mounting the diode 10 in the plate 3 is not essential.

In all cases, negative diode 10 and positive diode 8 are held in plate 3 and heat sink, respectively.

In one variant, the device 1 can also be applied to an alternator-starter of a motor vehicle, which is a reversible alternator which can alternately function as alternator generator current and in particular as an electric motor for starting. For further information see application WO 01/69762. This alternator-starter has the structure of a conventional alternator, and also has means for monitoring the rotation of the rotor to supply current to the stator windings when the machine is functioning in electric motor mode.

Therefore, the diodes 8 and 10 consist of MOSFET transistors in one variant.

The presence of resin 50, pad 34 and joint 46 in the figure is not essential, and in one variant the body 19 is mounted stationarily on the bearing housings 16, 18.

In one variant, the rotor of the machine has a protruding pole as described in document WO 02/054566.

In one variant, as described in document WO 02/054566 or as previously mentioned in document FR 2 905 806, which describes the coupling of the claw rotor with the axis of the rotor, the machine is intended to increase the power of the machine. Rotor is provided with a permanent magnet.

This is made possible by the present invention, which is able to dissipate heat better due to the increase in power, especially in the positive diode 8.

In one variant, the less powerful fan 102 than the fan 104 in FIG. 1 is omitted.

In one variant, the front bearing housing includes a passage for circulating the cooling fluid, such that the front bearing housing is cooled by the circulation of the cooling fluid, and the rear bearing housing and the current rectifying device are caused by the air circulation generated by the rear fan. Is cooled.

In one variant, at least one of the two bearing housings is not perforated. Of course, the casing of the machine may comprise an intermediate piece having a stator therein, which intermediate piece is located between the front and rear bearings.

In one variant, a single fan is externally located on the pulley and the air inlet opening provided in the plate of the bearing housing allows air to pass through the alternator in the axial direction, so in one variant the front and rear bearing housings There is no air outlet 5 in the vicinity.

In one variant, as described in document FR 2 744 575, the fan is replaced by a centrifugal pump installed in a housing formed at the rear of the alternator. In this case, the casing has a passage which goes out through the inner end of the housing of the centrifugal pump and also through the front end outside the alternator. Therefore, the pump sucks air in the alternator and discharges it out through the passage.

In this case the bearing does not have a rim with lateral air outlet openings.

In one variant, the current rectifying device and the protective cover are held in the front bearing housing as described in document FR 2 744 575.

In view of this document, it can be seen that in one variant the alternator does not have a brush.

In one variant, one of the bearing housings consists of a plate.

Of course, in one variant, the cover has a conventional shape and free space, so that it has a passageway between two consecutive cells.

Here, these passages do not have the same shape, one passage is bounded by two parallel transverse walls 192 ', 193, and the other passage is bounded by two divergent transverse walls 191', 192. It is decided. All of them depend on the application and in particular the shape of the inner pin.

The protruding wall of the cell has a large height, where it is larger than the height of the head of the fastening member. The walls and fins of the cell protrude from the body of the positive heat sink (in the form of a shield), which forms the passage between the bottom of the cell and the cell. The positive heat sink 9 has a simple shape, is light in weight, and has reduced in circumferential size. Of course, the way the negative heat sink consists of the bearing housing of the alternator will reduce the axial size, which is economical.

Claims (25)

As a current rectifying device (1) for a multiphase rotary electric machine, such as an automotive alternator, provided with bearing housings (16, 18),
A plate (3) belonging to the bearing housings (16, 18) and provided with an air inlet opening (7),
A shield-shaped heat sink 9, fixed to the bearing housings 16, 18, having a first current rectifying element 8, such as a diode, called a positive heat sink,
A second current rectifying element 10 held on a plate 3 of the bearing housings 16, 18, and
A connector 113 interposed between the heat sink 9 and the plate 3,
In the current rectifier,
Each of the first current rectifying elements 8 is mounted at the inner periphery of the heat sink 9 and is located at cooling cells A, B and C respectively, and these cooling cells are located at the outer periphery of the heat sink 9. Two protruding transverse walls 191-191 ', 192-192' which are bounded by protruding peripheral walls 91 to 93 located and which extend laterally from the outer periphery of the heat sink 9 to the inner periphery. 193-193 '),
Each cooling cell (A, B, C) is, first, clogged but open around the inner periphery of the heat sink 9, and second, at least one outer side shorter than the peripheral walls 91-93 of the cell in the circumferential direction. Holes 300, these outer holes are bounded by the inner periphery of the peripheral wall of this cell such that material is continuous between the corresponding first current rectifying element 8 and the peripheral wall,
Characterized in that a passage exists between the two transverse walls (193, 192'-192, 191 ') facing each other of two consecutive cells (C, BB, A)
Current rectifier. The method of claim 1,
At least one of the cells A, B, and C has inner cooling fins 200, 191-191 ′, 192-192 ′ that protrude radially inward with respect to the inner circumference of the heat sink, around its inner circumference. 193-193 ') is provided
Current rectifier. The method of claim 2,
At least one of the lateral walls 191-191 ', 192-192', 193-193 'of at least one cell extends radially inward from the inner periphery to form an inner cooling fin
Current rectifier. The method according to any one of claims 1 to 3,
At least one of the cells includes at least one supplementary inner cooling fin 200 that projects radially inward with respect to the inner periphery of the heat sink 9,
The first current rectifying element 8 of this cell is characterized in that it is located between the outer hole 300 and the inner fin 200.
Current rectifier. The method according to any one of claims 1 to 4,
Each cell has at least two outer holes 300 bounded by the inner periphery of its peripheral walls 91-93 such that material is continuous between the first current rectifying element 8 and the peripheral walls 91-93. Characterized in that it comprises
Current rectifier. 6. The method according to any one of claims 1 to 5,
Each transverse wall 191-191 ', 192-192', 193-193 'of at least one cell extends radially inward from the inner periphery to form an inner cooling fin,
The two holes 300 are also characterized in that they are bounded by one of the transverse walls 191-191 ', 192-192', 193-193 'on the side, respectively.
Current rectifier. 7. The method according to any one of claims 1 to 6,
At least one of the holes 300 of the at least one cell is characterized by at least one additional outer fin 400 located laterally outside of the cell's first current rectifying element 8.
Current rectifier. The method of claim 7, wherein
At least one of the cells includes a centering hole 97 'positioned between two outer pins 400, the hole receiving a centering pin 97 held in the connector 113. By
Current rectifier. The method according to any one of claims 1 to 8,
At least one of the cells comprises at least one additional inner cooling fin 200 protruding radially inward with respect to the inner periphery of the heat sink 9,
The first current rectifying element 8 of this cell is characterized in that it is located between the outer fin 400 and the inner fin 200.
Current rectifier. The method of claim 9,
The heat sink 9 comprises a first circumferential end 95 which overlaps the first circumferential end 95 ′ of the connector 113, wherein the heat sink 9 has a second circumferential end ( A cell called the end cell closest to 94 is characterized by including a larger number of additional fins 200 than other cooling cells 117.
Current rectifier. 11. The method of claim 10,
Each cooling cell comprises a number of peripheral holes 300 equal to or less than the number of additional inner fins.
Current rectifier. 12. The method according to any one of claims 1 to 11,
The heat sink 9 includes a first circumferential end 95 that overlaps the first circumferential end 95 ′ of the connector 113,
Among the cells, the cell C, which is called the end cell closest to the second circumferential end of the heat sink, is formed in the heat sink 9 for the passage of the member 115 which fixes the heat sink 9 to the plate 3. Adjacent to the fixing hole 115,
The end cell comprises a wavy transverse wall 193 'for forming a recess for the fixing member 115 associated with the fixing hole 115'.
Current rectifier. 13. The method according to any one of claims 1 to 12,
The heat sink 9 comprises fewer access holes 111 ′ than the number of first current rectifying elements 8, each of which access electrical connection terminals of the second current rectifying element 10. Characterized by having
Current rectifier. 14. The method according to any one of claims 1 to 13,
The heat sink 9 includes a first circumferential end 95 that overlaps the first circumferential end 95 ′ of the connector 113,
The heat sink includes a first access hole 111 ′ that allows access to one terminal of the second current rectifying element 10,
The first access hole 111 ′ is a cell A called the first cell closest to the first circumferential end 95 of the heat sink 9 in the circumferential direction and to the first circumferential end 95 in the circumferential direction A Characterized in that located between
Current rectifier. 15. The method of claim 14,
The current rectifying device comprises an intermediate cell B between the first cell A and the end cell C closest to the second circumferential end 113a of the heat sink,
A second hole 111 ′ for accessing the terminal of one of the second current rectifying elements 10 is provided between the intermediate cell B and the end cell C, and the heat sink 9 is plated. A through hole for the member 115 to be fixed to (3) is located between the first cell A and the intermediate cell B.
Current rectifier. The method of claim 15,
The opposing transverse walls 193, 192 ′ of the end cell and the intermediate cell are parallel to each other,
The heat sink 9 has, on each side of the first cell A and the end cell C, a through hole 115 ′ for the member 115 for fixing the heat sink to the plate 3,
Characterized in that an intermediate through hole for the fixing member 115 is located between the intermediate cell and the first cell.
Current rectifier. 17. The method according to claim 15 or 16,
The connector 113 has a body in the form of a shield and through holes 123, each of which is aligned with a through hole 115 ′ in the heat sink 9 and thus the fastening member 115. Each passes through a hole 115 in the heat sink 9 and a hole 123 in the connector 113,
The through hole 123 in the connector belongs to the protrusion 223 on the top surface 247 of the connector 113, thus providing a space between the connector 113 in the form of a shield and the bodies of the heat sink 9. Characterized by the presence of
Current rectifier. The method of claim 17,
The connector 113 is longer than the heat sink 9 in the circumferential direction,
The second circumferential end 113a of the connector extends protruding in the circumferential direction with respect to the second circumferential end 94 of the heat sink 9,
The second circumferential end 113a of the connector has a visible portion 134 connected at its inner periphery with the terminal of one of the second current rectifying elements 10, the visible portion being Characterized by the inward facing
Current rectifier. The method of claim 15,
The connector 113 is a hole 124 which is opposite to each access hole 111 ′ in the heat sink 9 and a single hole 122 that fits into the first current rectifying element 8 belonging to the first cell. Characterized in having
Current rectifier. The method of claim 19,
The connector 113 is wavy at its inner periphery to form two recesses in the first current rectifying element 8 located respectively in the intermediate and end cells,
The connector 113 has two visible portions 142 around its inner side, which portions are in electrical connection with one of two first current rectifying elements facing inwards and located respectively in the intermediate and end cells, respectively. To each of the recesses in the connector 113 to achieve
Current rectifier. The method according to any one of claims 1 to 20,
The outer periphery of the connector 113 is partly bounded by the face 149,
Each of the peripheral walls 91 to 93 is aligned with at least one face 149 in the axial direction.
Current rectifier. 22. The method according to any one of claims 1 to 21,
The connector is characterized in that it has a projection (148, 147) around its outer side for snap-fastening a protective cover (27) for the device (1) to the connector (113). In a multiphase rotary electric machine such as a car alternator,
Has a casing comprising at least one front bearing housing and one rear bearing housing 16, 18,
One of the bearing housings 16, 18 comprises a plate 3 provided with an air inlet opening 7 and also has a current rectifying device 1 according to claim 1. Characterized by
Multiphase rotary electric machine. The method of claim 23 combined with claim 14,
The multiphase rotary electric machine has a hollow cover 27 covering a current rectifying device, which includes a perforated bottom 228, which is a transverse wall adjacent to the first access hole 111 'in the heat sink. Characterized in that it has an L-shaped strip member 278 for delimiting the air passage opposite the first access hole with 191.
Multiphase rotary electric machine. The method of claim 24 in combination with claim 13,
The bottom 228 of the lid 227 includes a vertical lug 279 for guiding air flow around the inner side of the second access hole 111 ′ in the heat sink 9.
Multiphase rotary electric machine.

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