• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates primarily to a rotating electric machine for a motor vehicle characterized in that it comprises: - a heat sink (65), - two power modules (50) integrated in the heat sink (65) each having a unit of control adapted to drive three rectifier bridge arms associated with connection terminals (58), and - a connector (61) establishing electrical connections, in particular between the connection terminals (58) of the power modules (50) and the power outputs (58). phase of the rotating electrical machine.
    公开号:FR3052610A1
    申请号:FR1655517
    申请日:2016-06-14
    公开日:2017-12-15
    发明作者:Svetislav Jugovic；Fabrice Tauvron；Farouk Boudjemai；Lamarre Laurent De；Pierre-Francois Ragaine；Hugues Tempez
    申请人:Valeo Equipements Electriques Moteur SAS；
    IPC主号:
    专利说明:

    ROTATING ELECTRICAL MACHINE WITH ENHANCED POWER ELECTRONIC
    The present invention relates to a rotating electric machine with improved power electronics. The invention finds a particularly advantageous, but not exclusive, application in the field of alternators for motor vehicles. Such an alternator transforms mechanical energy into electrical energy and can be reversible.
    Such a reversible alternator called alternator-starter makes it possible to convert electrical energy into mechanical energy, in particular to start the engine of the vehicle.
    In a manner known per se, an alternator comprises a housing and, inside thereof, a claw rotor, integral in rotation with a shaft, and a stator which surrounds the rotor with the presence of an air gap.
    The rotor comprises two pole wheels each having a transversely oriented flange provided at its outer periphery axially oriented claws. The claws of the pole wheels are nested with respect to each other. A cylindrical core is interposed axially between the flanges of the wheels. This core carries at its outer periphery an excitation coil formed around an insulating element inserted radially between the core and the coil.
    Furthermore, the stator comprises a body consisting of a stack of thin sheets forming a ring, whose inner face is provided with notches open inwardly to receive phase windings. These windings pass through the notches of the stator body and form buns protruding from both sides of the stator body. The phase windings are obtained for example from a continuous wire covered with enamel or from conductive elements in the form of pins connected together by welding.
    The phase windings are electrically connected to electronic power modules via their phase output. These power modules form a voltage rectifier bridge. Generally, each power module comprises a control unit able to drive two bridge arms each comprising two rectifier elements constituted for example by MOSFET type transistors. The control of the bridge arms is carried out in particular according to the stator temperature, the position and the speed of the rotor, as well as operating parameters of the engine returned by the engine computer.
    For a stator having two three-phase systems or six phases in total, the current configurations require the use of three power modules, which constitutes a bulky assembly that does not make it possible to adapt to electrical machines of reduced diameter, or to integrate easily new functions desired by car manufacturers, such as a regenerative braking function or assistance in stopping the engine in the framework of "stop and start" type system (or stop and start system). -automatic start of the engine). The invention aims to remedy these drawbacks effectively by proposing a rotary electric machine for a motor vehicle characterized in that it comprises: a heat sink, two power modules integrated in the heat sink each having a control unit adapted to driving three rectifier bridge arms associated with connection terminals, and - a connector establishing electrical connections, in particular between the connection terminals of the power modules and the phase outputs of the rotating electrical machine.
    The rotating electrical machine therefore has two unique power modules. In this way, the two power modules can drive all phases of a winding of a stator of the rotating electrical machine. This has an economic advantage, as it allows you to remove a power module. In addition, the interconnection of the power modules with the control electronics is easier because there are only two power modules, which facilitates the implementation of the functions of the regenerative braking type or helps to stopping the engine. In addition, it can also reduce the heatsink and connector count.
    In one embodiment, the power modules are positioned in corresponding housings formed in the heat sink.
    According to one embodiment, a layer of adhesive is interposed between the power modules and a bottom of each corresponding housing.
    According to one embodiment, each power module comprises a control unit and three bridge arms each being formed by two rectifying elements.
    According to one embodiment, the rectifying elements are MOSFET transistors.
    In an alternative embodiment, each power module may include diodes adapted to rectify the current of the phases of the stator winding.
    According to one embodiment, said rotating electrical machine further comprises a regulation module for regulating a voltage applied to a rotor winding, said regulation module being integrated in the heat sink. The space released on the heatsink makes it possible to install a module for regulating the voltage of the rotor winding on the heatsink. This gives a compact assembly suitable for implantation on small diameter machines.
    According to one embodiment, said regulation module comprises connection terminals soldered to connection areas of the connector. This allows the power supply of the control module and its interconnection with the power modules.
    According to one embodiment, the regulation module is positioned in a corresponding housing formed in the heat sink.
    In one embodiment, a layer of adhesive is interposed between the regulation module and the heat sink. For example, the adhesive layer is interposed between the regulation module and a bottom of the corresponding housing.
    According to one embodiment, the connector and the heat sink have a closed periphery delimiting an opening. This makes it possible to stiffen the connector-heat sink assembly.
    According to one embodiment, the connector comprises two sets of connection tabs to provide a connection with phase outputs, the two sets extending along two distinct angular sectors relative to each other.
    According to one embodiment, each set of connection lugs extends opposite a corresponding power module.
    In one embodiment, the two sets of connection tabs are angularly spaced from each other by an angle of 120 degrees.
    According to one embodiment, the connector comprises a set of connection tabs extending in the same angular sector to provide a connection with phase outputs.
    In one embodiment, the connection tabs are positioned between the two power modules.
    According to one embodiment, said rotating electrical machine comprises an insert brush holder attached to the connector by screwing a connection interface.
    In one embodiment, the connector is attached to the heat sink by means of screws connecting to a positive terminal.
    In one embodiment, the assembly formed by the connector and the heat sink is fixed on a bearing of the electric machine by means of screws establishing a connection between the tracks of the connector and a mass of the rotating electrical machine.
    In one embodiment, the connection terminals of the power modules are soldered to corresponding connection areas of the connector.
    In one embodiment, each housing is filled with a protective layer. The invention will be better understood on reading the description which follows and the examination of the figures which accompany it. These figures are given for illustrative but not limiting of the invention.
    Figure 1 is a longitudinal sectional view of an alternator according to the present invention;
    Figure 2 is a perspective view showing the rear end of the alternator according to the present invention;
    FIG. 3 is an exploded perspective view of the connector, the power electronics modules, the regulator module, and the heat sink of the alternator according to the present invention;
    FIG. 4 is an exploded perspective view of the electronic power and regulation modules, and the heat sink of the alternator according to the present invention;
    Figure 5 is a perspective view of the electronic power and control modules installed in corresponding housings of the heat sink of the alternator according to the present invention;
    Figure 6 is a perspective view from above of the subassembly formed by the heat sink and the connector of the alternator according to the present invention;
    Figure 7 is a bottom perspective view of the subassembly formed by the heat sink and the alternator connector according to the present invention;
    FIG. 8 is a perspective view illustrating a variant of the positioning of the phase outputs of the stator winding of the alternator according to the present invention.
    Identical, similar or similar elements retain the same reference from one figure to another.
    FIG. 1 shows a compact and polyphase alternator 10, in particular for a motor vehicle. The alternator 10 is able to transform mechanical energy into electrical energy and may be reversible. Such a reversible alternator, called alternator-starter, makes it possible to convert electrical energy into mechanical energy, in particular to start the engine of the vehicle.
    This alternator 10 comprises a casing 11 and, inside thereof, a claw rotor 12 mounted on a shaft 13, and a stator 16, which surrounds the rotor 12 with the presence of an air gap between the outer periphery of the rotor. rotor 12 and the inner periphery of the stator 16. The axis X along which the shaft 13 extends forms the axis of rotation of the rotor 12.
    The housing 11 comprises front 17 and rear 18 bearings bearing the stator 16. The bearings 17, 18 are of hollow form and each carry a central ball bearing for the rotational mounting of the shaft 13.
    More specifically, the rotor 12 comprises two pole wheels 24, 25 each having a flange 28 of transverse orientation provided at its outer periphery with claws 29 for example of trapezoidal shape and axial orientation. The claws 29 of a wheel 24, 25 are directed axially towards the flange 28 of the other wheel. The claws 29 of a pole wheel 24, 25 penetrate into a gap between two claws 29 adjacent to the other pole wheel, so that the claws 29 of the pole wheels 24, 25 are interlocked with respect to other.
    A cylindrical core 30 is interposed axially between the flanges 28 of the wheels 24, 25. In this case, the core 30 consists of two half-cores each belonging to one of the flanges 28. This core 30 carries at its outer periphery a The shaft 13 may be force-fitted into the central bore of the pole wheels 24, 25. On the side of its front end, the shaft 13 may comprise a threaded portion for the attachment of a rotor. pulley 35. The pulley 35 belongs to a device for transmitting movements to at least one belt between the alternator 10 and the engine of the motor vehicle.
    The rear bearing 18 carries a brush holder 38 provided with brushes 39 intended to rub against rings 40 of a manifold 41 to supply the winding of the rotor 12. More specifically, the brush holder 38 comprises a housing having dwellings intended to each receive a broom. In addition, an attached protective element 42 visible in Figure 2 may be fixed for example by snapping via a sliding link on the side of the end of the brushes 39 intended to rub against the rings 40. This protective element 42 positioned around the brushes 39 and corresponding rings 40 ensures the protection of the assembly vis-à-vis the external environment.
    Moreover, the stator 16 comprises a body 43 in the form of a sheet metal package provided with notches equipped with notch insulation for mounting the phases of the stator 16. Each phase comprises at least one phase winding passing through the notches of the body stator 43 and forms, with all the phases, a front bun 46 and a rear bun 47 on either side of the stator body 43.
    The phase windings are obtained for example from a continuous wire covered with enamel or from conductive elements in the form of pins electrically connected to each other for example by welding. The phase windings are electrically connected to power electronic modules 50 via their phase output. These power modules 50 form a voltage rectifier bridge for converting the alternating voltage generated by the alternator 10 into a DC voltage to supply the battery and the onboard network of the vehicle, in particular.
    More precisely, as can be seen in FIG. 4, the rotating electrical machine comprises two power modules 50. Each power module 50 comprises a control unit 51 able to control three bridge arms 52 each comprising two rectifier elements 53. Rectifier elements 53 are for example constituted by transistors of the MOSFET type.
    Thus, in the example of a rotating electrical machine which has a three-phase double winding, each power module drives three phases of the stator 16.
    In an alternative embodiment, each power module may comprise several diodes.
    These components 51, 52, 53 and other passive components (resistors and capacitors in particular) are implanted on an electronic card 54 having traces 55 formed in a layer of conductive material including a copper layer. The copper layer for example covers a ceramic layer also carrying a second copper layer on the opposite side to the face of the card 54 carrying the electronic components. In this example, the various components are implanted on the card 54 by soldering.
    The components are electrically connected to the traces 55 of the electronic card 54 for example by a wired wire bonding method in English. Connection terminals 58 are associated with the various power modules 50 for interconnection with the tracks 60 of a connector 61 described in more detail below.
    The electric machine 10 also comprises a regulation module 62 for regulating a voltage applied to a rotor winding. This regulation module 62 comprises a control unit 51 and associated electronic components.
    For example, the control unit 51 and the associated electronic components of the regulation module 62 are located on an electronic card 54 having traces 55 formed in a layer of conductive material, in particular a layer of copper.
    As can be seen in FIGS. 3, 4 and 5, the power modules 50 as well as the regulation module 62 are integrated in a heat sink 65, that is to say that they are each positioned at the same time. inside a corresponding housing 67 formed in the heat sink 65.
    Preferably, in order to improve the evacuation of the heat diffused by the different modules 50 and 62, a thermally conductive adhesive layer 68 is interposed between the power modules 50 and a bottom of each corresponding housing 67 as well as between the control module 62 and a bottom of the housing 67 corresponding. Preferably, the adhesive layer 68 is deposited between the face of the non-component-carrying card and the bottom of the housing 67. The adhesive also allows the different modules 50, 62 to be fixed in the housings 67.
    Each housing 67 may be filled with a protective layer such as gel or resin to protect the electronic components from the external environment. Alternatively, each housing 67 can be closed by a respective cap.
    Advantageously, the heat sink 65 comprises a plurality of fins 66 projecting from the outer face of the body of the dissipator 65. By "external face", denotes the face of the dissipator opposite to the internal face of said dissipator which is vis-à-vis the stator.
    The connector 61 and the heat sink 65 preferably have a closed periphery defining an opening 71 visible in particular in Figures 5 and 7. This facilitates the integration of the brush holder 38 and the air flow inside. of the alternator 10. For this purpose, the alternator 10 comprises blades 72 mounted integral in rotation on the axial ends of the rotor 12, as shown in FIG.
    The connector 61 establishes electrical connections, in particular between the terminals 58 of the power modules 50 and the phase outputs of the alternator 10. The connector 61 also establishes electrical connections between the components of the electronic boards 54 and the positive potential via a terminal positive positive B + referenced 75. The positive terminal 75 is, for example, disposed on the heat sink 65. In addition, the connector 61 also establishes electrical connections between the components of the electronic cards 54 and a mass of the vehicle including via the rear bearing 18 or the heat sink 65. For this purpose, as shown in Figure 7, the connector 61 comprises a body 78, generally plate-shaped made of insulating material, overmoulded on a set of conductive tracks 60, some of which have been shown in broken lines. The connections between the terminals 58 of the power modules 50 and the tracks 60 are made for example by laser welding through connection areas 81. Each connection zone 81 is formed by a conductive track portion 60 which is not overmolded. by the body 78. The regulation module 62 also includes projecting terminals 58 welded to corresponding connection areas 81 of the connector 61.
    As can be seen in FIGS. 2, 6 and 8, some tracks 60 protrude radially outwardly from the body of the connector 78 by being arranged at their free ends in the form of connection lugs 95 to establish the connection with the phase outputs stator winding.
    In the embodiment of FIGS. 2 and 6 representing a three-phase dual machine, the connector 61 comprises two sets 94 of three connection tabs 95 intended to be connected with phase outputs. The two sets 94 extend along two distinct angular sectors relative to each other. It is specified that an angular sector is defined by an angular zone according to which the connection tabs 95 (and therefore the phase outputs of the stator winding) are spaced apart from each other by a substantially identical angular interval.
    Each set 94 of connection lugs 95 extends vis-à-vis a corresponding power module 50. In one exemplary embodiment, the two sets 94 of connection lugs 95 are angularly spaced from each other by an angle A of the order of 120 degrees.
    In the embodiment of Figure 8 also showing a three-phase dual machine, the connector 61 has a set 94 of connecting lugs 95 extending in the same angular sector. The connection tabs 95 can then be positioned between the two power modules 50.
    The brush holder 38 attached may be fixed to the connector 61 by screwing a connection interface 96. This connection interface 96 provides the connection of the brush holder 38 with the connector 61 to power the brushes 39. For this purpose, two supply tracks for supplying the brushes 39 extend from the connection interface 96 to the welding zones 98 with the braids of the brushes. On the side of their end located at the connection interface 96, the supply tracks may have a half-moon shape for interconnection with corresponding shapes 97 of the connector 61 visible in Figure 6.
    The connector 61 is fixed on the heat sink 65 for example by means of screws. Fixing the connector 61 on the heat sink 65 makes it possible to establish a connection of the connector 61 to the positive terminal B + 75. For this purpose, the screws pass through corresponding openings of the connector 61 referenced 100 in FIG.
    The subset formed by the connector 61 and the heat sink 65 is fixed on the rear bearing of the electric machine for example by means of screws establishing a connection between the tracks of the connector 61 and a mass of the rotating electrical machine. For this purpose, the screws pass through corresponding openings of the connector 61 referenced 101. Insulating guns positioned around the screws may be provided to prevent possible short circuits.
    Of course, the foregoing description has been given by way of example only and does not limit the scope of the invention which would not be overcome by replacing the different elements by any other equivalent.
    In addition, the various features, variations, and / or embodiments of the present invention may be associated with each other in various combinations, to the extent that they are not incompatible or exclusive of each other.
    权利要求:
    Claims (15)
    [1" id="c-fr-0001]
    1. A rotary electric machine (10) for a motor vehicle characterized in that it comprises: - a heat sink (65), - two power modules (50) integrated in the heat sink (65) each comprising a control unit ( 51) adapted to drive three rectifier bridge arms (52) associated with connection terminals (58), and a connector (61) establishing electrical connections, in particular between the connection terminals (58) of the power modules (50) and phase outputs of the rotating electrical machine (10).
    [2" id="c-fr-0002]
    2. Rotating electric machine according to claim 1, characterized in that the power modules (50) are positioned in corresponding housings (67) formed in the heat sink (65).
    [3" id="c-fr-0003]
    3. A rotary electric machine according to claim 2, characterized in that an adhesive layer (68) is interposed between the power modules (50) and a bottom of each housing (67) corresponding.
    [4" id="c-fr-0004]
    Rotary electric machine according to any one of claims 1 to 3, characterized in that each power module comprises a control unit (51) and three bridge arms (52) each being formed by two rectifying elements (53). .
    [5" id="c-fr-0005]
    5. rotary electric machine according to any one of claims 1 to 4, characterized in that it further comprises a control module (62) for regulating a voltage applied to a rotor winding (31), said control module being integrated in the heat sink (65).
    [6" id="c-fr-0006]
    6. A rotary electrical machine according to claim 5, characterized in that said control module (62) comprises connection terminals (58) welded to connection areas (81) of the connector (61).
    [7" id="c-fr-0007]
    7. A rotary electric machine according to claim 5 or 6, characterized in that the control module (62) is positioned in a recess (67) formed in the heat sink (65).
    [8" id="c-fr-0008]
    8. A rotary electric machine according to claim 7, characterized in that an adhesive layer (68) is interposed between the control module (62) and the heat sink (65).
    [9" id="c-fr-0009]
    9. rotary electrical machine according to any one of claims 1 to 8, characterized in that the connector (61) and the heat sink have a closed periphery defining an opening (71).
    [10" id="c-fr-0010]
    Rotary electric machine according to any one of claims 1 to 9, characterized in that the connector (61) comprises two sets (94) of connection lugs (95) to provide a connection with phase outputs, both assemblies (94) extending in two distinct angular sectors relative to one another.
    [11" id="c-fr-0011]
    11. A rotary electric machine according to any one of claims 1 to 9, characterized in that the connector (61) comprises a set (94) of connection lugs (95) extending in the same angular sector to provide a connection with phase outputs.
    [12" id="c-fr-0012]
    12. A rotary electric machine according to any one of claims 1 to 11, characterized in that it comprises a brush holder (38) attached attached to the connector (61) by screwing a connection interface (96).
    [13" id="c-fr-0013]
    13. A rotary electric machine according to any one of claims 1 to 12, characterized in that the connector (61) is fixed on the heat sink (65) by means of screws establishing a connection to a positive terminal (75).
    [14" id="c-fr-0014]
    14. A rotary electric machine according to any one of claims 1 to 13, characterized in that the assembly (94) formed by the connector (61) and the heat sink (65) is fixed on a bearing (18) of the electric machine by means of screws making a connection between the tracks (60) of the connector (61) and a mass of the rotating electrical machine.
    [15" id="c-fr-0015]
    Rotary electric machine according to one of claims 1 to 14, characterized in that the connection terminals (58) of the power modules (50) are soldered to corresponding connection areas (81) of the connector (61). .
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    同族专利:
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    引用文献:
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    JP2017200413A|2016-04-29|2017-11-02|株式会社デンソー|Controller integrated rotary electric machine|FR3043858B1|2015-11-13|2020-05-29|Valeo Systemes Thermiques|ELECTRIC MOTOR POWER CONTROL MODULE|
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    DE102018221667A1|2018-12-13|2020-06-18|Siemens Aktiengesellschaft|Motor device for a switch drive of an electrical switch|
    法律状态:
    2017-06-30| PLFP| Fee payment|Year of fee payment: 2 |
    2017-12-15| PLSC| Publication of the preliminary search report|Effective date: 20171215 |
    2018-06-27| PLFP| Fee payment|Year of fee payment: 3 |
    2020-06-30| PLFP| Fee payment|Year of fee payment: 5 |
    2021-06-30| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1655517A|FR3052610B1|2016-06-14|2016-06-14|ELECTRIC ROTATING MACHINE WITH IMPROVED POWER ELECTRONICS|FR1655517A| FR3052610B1|2016-06-14|2016-06-14|ELECTRIC ROTATING MACHINE WITH IMPROVED POWER ELECTRONICS|
    EP17168598.5A| EP3258579A1|2016-06-14|2017-04-28|Rotary electric machine with improved power electronics|
    US15/605,504| US10491079B2|2016-06-14|2017-05-25|Rotary electrical machine with improved power electronics|
    CN201710442214.8A| CN107508429B|2016-06-14|2017-06-13|Rotating electrical machine with improved power electronics|
    JP2017116140A| JP2018027004A|2016-06-14|2017-06-13|Rotary electrical machine with improved power electronics|
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