Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K3/00—Details of windings
  • H02K3/46—Fastening of windings on the stator or rotor structure
  • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
  • H02K11/30—Structural association with control circuits or drive circuits
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
  • H02K2203/06—Machines characterised by the wiring leads, i.e. conducting wires for connecting the winding terminations
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K5/00—Casings; Enclosures; Supports
  • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
  • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
  • H02K5/225—Terminal boxes or connection arrangements

Definitions

• assembly comprising a rotating electrical machine, a connector and an electronic module
• the present invention relates to a connector between an electrical machine and an electronic module.
• the invention also relates to an assembly comprising a rotating electric machine an electronic module between which is interposed the connector to electrically connect the two parts.
• a rotating electrical machine has an interior space comprising a stator and a rotor secured to a shaft.
• the rotor may be integral with a driving and / or driven shaft and may belong to a rotating electric machine in the form of an alternator, an electric motor, or a reversible machine capable of operating in both modes.
• the stator is mounted in a housing configured to rotate the shaft on bearings by means of bearings.
• the housing partially defines the interior space of the electrical machine.
• the rotor comprises a body formed by a stack of metal sheets held in the form of a bundle by means of a suitable fixing system.
• the rotor comprises poles formed for example by permanent magnets housed in cavities formed in the magnetic mass of the rotor. Alternatively, in a so-called “salient” pole architecture, the poles are formed by coils wound around the rotor arm.
• the stator comprises a body formed by a stack of thin sheets forming a ring, the inner face of which is provided with notches open inward to receive phase windings. These windings pass through the notches and form buns projecting on either side of the body of the stator.
• the phase windings are obtained for example from a continuous wire covered with enamel or from elements conductors in the form of pins connected together by welding.
• the phase windings can be connected in star or delta.
• the electronic power and control module makes it possible to supply the winding according to a polyphase current system, for example three-phase, for example two-three-phase.
• the connector makes the connection between the module and the various phase windings of the winding.
• DE112017000295T5 and CN 108448823 A are known to have assemblies comprising an electrical machine and an electronic module, the electrical connection of which is not satisfactory.
• the electrical connections between the electronic module and the electrical machine make the management of separate cooling and sealing around the parts of electrical connections which enter the interior spaces of the electrical machine and of the electronic module complex.
• the present invention aims to respond effectively to this problem by proposing a connector capable of equipping an assembly comprising:
• stator comprising a body and a coil, the coil comprising a plurality of phases, in particular six phases, each comprising two ends, - an interconnector comprising phase conductive tracks connecting the phase ends to output pins of the electrical machine,
• the module having an interior space, the electronic module comprising a plurality of input pins, characterized in that the connector comprises :
• a closure part capable of closing the interior space of the electrical machine and capable of closing the interior space of the electronic module, the closure piece being traversed by the intermediate power connection system.
• the connector makes it possible to decorrelate the electrical connections on the machine side and on the module side.
• the connector allows the module and the machine to be electrically connected without fluid transfer, especially when the machine and the inverter are cooled separately.
• the connector via its closure piece, allows the closure of the interior spaces of the electrical machine and of the electronic module to be shared.
• the intermediate power connection system is separate from each of the input and output pins. This allows manufacturing in total independence of the electronic module and the electrical machine.
• the closure piece can be made in one piece.
• the closure part can be made of a non-conductive material, for example plastic.
• the closing piece may be full.
• the closure piece may include ears for the passage of the connector fixing member.
• the intermediate power connection system passes through the closure part in a hermetic manner.
• the closure part can be overmolded on the intermediate power connection system.
• the intermediate power connection system can comprise a plurality of intermediate pins, in particular six. Each intermediate pin can pass through a passage dedicated to it in the closure part.
• each pin can be a single piece.
• each intermediate pin can be rectilinear or angled.
• Each intermediate pin may have the shape of a tongue.
• Each intermediate spindle has two free ends, one end called machine capable of being connected to an output spindle of the electrical machine and one end called module adapted to be connected to an input spindle of the electronic module.
• the ends can be connected by a central portion embedded in the closure part.
• the free ends can be rounded.
• the ends can be straight.
• the intermediate pins are all aligned in the same direction.
• the intermediate pins can be arranged in several layers offset from one another, for example in two layers.
• the intermediate pins can be aligned on a single layer on one side, machine or module, and arranged in several layers on the other side, machine or module.
• the closure piece may be elongated, in particular oblong, in the direction in which the intermediate pins are aligned.
• the connector may include an intermediate control connection system.
• the intermediate control connection system can be arranged next to the intermediate power connection system.
• the intermediate power connection system can be arranged on either side of the intermediate control system.
• the connector can comprise at least one block for the passage of the intermediate control connection system.
• the intermediate control connection system makes it possible to send and receive control signals between the electronic machine and the electronic module to control the assembly.
• the intermediate control connection system may include a plurality of wires capable of transmitting signals. These wires are not able to transmit power between the machine and the module.
• the block can extend from the closure piece.
• the block can come integrally with the closing piece.
• the intermediate pins can be divided into two groups and the block can be arranged between these two groups of intermediate pins.
• the connector may comprise two blocks, arranged on either side of the closure part. These blocks are called machine side block and module side block.
• the closing part may include a closing surface on the machine side, in particular flat, able to cooperate with a closing surface of the electrical machine, in particular flat.
• the closure part may include a closure surface on the module side, in particular planar, able to cooperate with a closure surface of the electronic module, in particular planar.
• the block or both blocks may extend from one of the closure surfaces of the closure piece.
• the closure surfaces of the closure part are parallel to each other.
• the closure part may include a machine-side groove opening onto the machine-side closure surface.
• the closure part may include a groove on the module side opening onto the closure surface on the module side.
• the groove or grooves can each receive a seal.
• the groove or grooves may surround the intermediate power connection system and / or the intermediate control connection system.
• the closure part may include at least one recess facing at least one intermediate pin.
• This recess makes it possible to increase the cooling of this intermediate spindle, in particular of its central portion.
• the closure part may have a lateral flank which extends between the two closure surfaces.
• This side may have a plurality of recesses. The recesses can be separated from each other from the side reinforcements.
• Each intermediate pin can be located opposite a recess, in particular two laterally opposed recesses.
• a subject of the invention is also the assembly as defined above comprising the electrical machine, the electronic module and the connector as described above.
• the closure part is external to the two interior spaces.
• the closing piece delimits the two interior spaces.
• the type of cooling can be chosen separately for the machine and for the module.
• the electrical connection is made between the module and the machine without fluid transfer between the machine and the module, nor between the exterior and interior spaces of the machine and the module.
• the electronic module is not used to close the interior space of the electric machine. This simplifies the assembly of the whole.
• the electronic machine is not used to close the interior space of the electronic module. This simplifies the assembly of the whole.
• the machine side closing surface can cooperate with the electrical machine closing surface. This helps prevent leaks at the connector.
• the seal is improved when the machine-side seal comes in contact with the closing surface of the machine.
• the groove on the machine side may belong to the electrical machine. The seal then comes into contact with the machine-side closure surface of the closure part.
• the module side closure surface can cooperate with the module closure surface.
• the seal is improved when the seal on the module side comes into contact with the closing surface of the module.
• the groove on the module side may belong to the electronic module. The seal then comes into contact with the machine-side closure surface of the closure part.
• the closing surface of the machine and / or closing surface of the module are normal to the axis of rotation.
• these closure surfaces may be normal to a radial direction.
• the closure part can form a spacer between the electronic module and the electrical machine.
• the block or blocks penetrate the interior spaces of the machine and of the module.
• the connector can be attached to the electrical machine.
• the connector can be fixed on the electronic module.
• the coil can be of the double three-phase star or delta type.
• each intermediate pin can be connected to one of the output pins in the interior space of the electrical machine.
• each intermediate pin can be connected to one of the input pins in the interior space of the electronic module.
• the number of pins can be equal to the number of output pins and it can be equal to the number of intermediate pins.
• the number of pins of each type can be equal to six, especially in the case of a three-phase double winding.
• the contact can be surface between the intermediate pins and the input pins and / or the output pins.
• the output pins can be secured to the intermediate pins, for example by screwing. As a variant, they can simply be pressed against each other without being integral with one another.
• the input pins may be integral with the intermediate pins, for example by screwing. As a variant, they can simply be pressed against each other without being integral with one another. As a further variant, the intermediate pins can be plugged into the input pins. As a further variant, the input pins can be plugged into the intermediate pins.
• the input pins and the output pins can be straight or angled.
• the input pins and the output pins, or portions only of said pins, may extend in the same direction, for example axially, for example in a radial plane, that is to say in a plane normal to the axial direction.
• the intermediate pins can extend in the axial direction.
• the intermediate pins can extend in a radial plane.
• the intermediate pins can all be concentrated on a predetermined angular portion.
• This angular portion predetermined may be less than, for example 45 degrees, for example 30 degrees.
• the electrical machine may include a partition delimiting the interior space of the electrical machine.
• This partition can be fixed to a fixed casing on which the stator is mounted.
• This partition can be plastic and the casing is metal.
• the partition may include a first opening for the passage of the intermediate power connection system.
• the first opening is surrounded by the closing surface of the machine.
• the partition may include a first hatch facing the output pins.
• This first hatch can be opposite the intermediate pins. This hatch allows, during assembly, to connect the output pins to the intermediate pins.
• this first hatch can be closed by a first cover.
• a first waterproof seal may be provided to seal the interior space at the level of the first hatch.
• the first cover can be fixed to the partition, in particular by screwing, in particular by clipping.
• the first hatch can be perpendicular to the closing surface of the machine.
• the first hatch can be oriented axially.
• the electronic module may include a housing delimiting the interior space of the module.
• the closure piece can be attached to the housing.
• the housing may include a second opening for the passage of the intermediate power connection system.
• the second opening is surrounded by the closing surface of the module.
• the housing may include a second hatch facing the input pins. This second hatch can be opposite the intermediate pins. This hatch allows, during assembly, to connect the intermediate pins to the input pins.
• this second hatch can be closed by a second cover.
• a second waterproof seal can be provided to make the sealed interior space at the level of the second hatch.
• the second cover can be fixed to the housing, in particular by screwing, in particular by clipping.
• the second hatch can be perpendicular to the closing surface of the module.
• the second hatch can be oriented axially.
• the electric machine can be cooled by oil.
• the electric machine can be cooled by water.
• the electronic module can be water cooled.
• the electronic module can be carried radially by the electrical machine. This configuration can be called a “backpack”.
• the electronic module is axially offset from the electrical machine.
• the electric machine and the electronic module follow one another axially.
• Figure 1 is a schematic longitudinal sectional view of the assembly in a first configuration and according to the present invention
• Figure 2 is a variant of the assembly of Figure 1 according to another configuration
• Figure 3 is a longitudinal sectional view of an example of an electrical machine of the assembly of Figure 1;
• Figure 4 is a perspective view of the rotor of Figure 3;
• Figure 5 is a perspective view of an example assembly in the configuration of Figure 2;
• Figure 6 is a sectional view of the assembly of Figure 5;
• Figure 7 is a perspective view of the connector of Figures 5 and 6;
• a "front” element is understood to mean an element located axially on the side of the end of the shaft projecting from the machine and intended to carry a pinion or a pulley, and by element “rear” an element located on the opposite side.
• FIG. 1 shows a traction assembly 1 which can be integrated into a traction architecture of a motor vehicle, in particular a low-power vehicle.
• the assembly comprises a rotary electric machine 10 comprising a fixed polyphase stator 11 and surrounding a rotor 12, movable in rotation and mounted on a shaft 13 extending along an axis of rotation X. the axis of rotation X is defined. like the axis of the rotary electric machine 10.
• the electric machine 10 has an interior space which receives the various functional elements of the machine.
• the machine has a housing 14; fixed and metallic, shown in the following figures, which defines at least in part the interior space of the electrical machine.
• This assembly 1 can be intended to be coupled to a gearbox belonging to a motor vehicle traction chain.
• the assembly 1 is able to operate in an alternator mode in order in particular to supply energy to the battery and to the on-board network of the vehicle, and in an engine mode, not only for starting the thermal engine of the vehicle, but also to participate in the traction of the vehicle alone or in combination with the heat engine.
• the power of the machine 10 may be between 10kW and 50kW.
• the electric machine 10 could be installed on an axle of the motor vehicle, in particular a rear axle.
• the electric machine 10 advantageously has an operating voltage of less than 60 volts, and preferably of 48 volts.
• the torque supplied by the electric machine is between 300N.m and 500N.m.
• the assembly comprises an electronic power and control module 5, also called a power inverter, for supplying a polyphase current system to the stator 11.
• the electronic module 5 comprises a housing 9 which at least partially defines an interior space of the electronic module 5.
• the module 5 comprises power components, as well as an electronic circuit for controlling said power elements.
• These power components are in particular switching elements 17, such as low thermal resistance transistors such as MOSFET type transistors.
• These switching elements 17 are preferably based on gallium nitride (GaN).
• the electronic module 5 also includes a circuit. All of these components are located in the interior of the module.
• the electronic module 5 also comprises a plurality of input pins 56 to connect these switching elements to the stator 11 of the electrical machine. These input pins extend only and entirely into the interior space of the electronics module.
• the electronic module 5 is disposed on one side of an axial end of the electric machine 10.
• the electric machine and the module therefore follow each other axially.
• the assembly 1 is in a so-called "backpack" configuration, the electronic module 5 is carried radially by the electrical machine. There is a radial plane which passes through both the electrical machine 10 and the electronic module 5.
• the electric machine 10 can be cooled by oil or by water.
• the electronic module 5 can be cooled by water.
• the module may include a heat sink to cool its interior space in which the power components are located and which heat up when the assembly is in use.
• the stator 11 surrounds the rotor .12 with the presence of an air gap between the internal periphery of the stator 11 and the external periphery of the rotor 12.
• the stator 11 is mounted in the housing 14 provided with a front bearing 17 and a rear bearing 18.
• the bearings 17, 18 each comprise a housing for receiving a bearing 16 in order to ensure a rotational mounting of the shaft 13 relative to the casing 14 of the electric machine.
• the rotor 12 comprises a body 19 in the form of a bundle of sheets.
• Permanent magnets 20 are implanted in cavities 21 of the body 19.
• the magnets 20 are implanted in a V-shaped configuration.
• the magnets 20 are implanted radially inside the cavities 21, the faces in vis-à-vis two adjacent magnets 20 being of the same polarity. This is then a flow concentration configuration.
• the magnets 20 may be of rare earth or of ferrite depending on the applications and the desired power of the electric machine 10.
• the rotor 12 comprises two flanges 22 each pressed against an axial end face of the rotor body 19. These flanges 22 provide axial retention of the magnets 20 inside the cavities 21 and serve also to balance the rotor 12.
• a spring 25 can be inserted inside each cavity in order to hold the magnets 20 radially inside the cavities 21.
• the stator 11 comprises a body 23 consisting of a pack of sheets as well as a coil 24.
• the body 23 is formed by a stack of sheets of sheets independent of each other and maintained in the form of a coil. package by means of a suitable fixing system.
• the body 23 is provided with teeth 31 defining two by two notches 33 for mounting the winding 24 of the stator 11.
• the coil 24 comprises a plurality of phases 48, in the form of a winding, passing through the notches 33 and forming buns 36 projecting on either side of the stator body 23.
• Each phase 48 has two ends.
• the phases are obtained here from conductive elements in the form of pins, the ends of which are interconnected for example by welding.
• the phases of the winding 24 here have a three-phase star configuration.
• the phase windings can also be connected in delta.
• these phases 48 are connected to the input pins 56 of the electronic module 5 by means of an interconnector 51, output pins 55 and a connector 52.
• the interconnector 51 extends only and entirely in the interior space of the electrical machine 5.
• the interconnector comprises conductive tracks to allow the electrical connection between the phase ends 48 and the output pins. 55. These conductive tracks can for example be bus bars.
• These phase conductive tracks can be overmolded, in particular in an overmolding body.
• the overmolding body is advantageously made of an insulating material, in particular of plastic.
• the overmolding body has an annular shape that is substantially coaxial with the shaft 13.
• the interconnector 51 also makes it possible to ensure an electrical connection of the phase ends between them to form a neutral point 49 in this star configuration.
• Figures 5, 6 and 7 illustrate another example of the assembly 1 again in a "backpack" configuration.
• the details of the machine / module interface and in particular the connector 52 are shown in detail therein.
• the electrical machine 10 here comprises a partition 58 which partially delimits, with the casing 14 already mentioned, the interior space of the electrical machine.
• the partition is here attached to the rear bearing 18, behind it.
• This partition is here made of plastic and includes recesses 59 to house the interconnector 51.
• the connector 52 is here fixed to the electrical machine.
• the coil 24 is of the double three-phase type.
• the electrical machine 10 then has six output pins 55 and the electronic module has six input pins 56, as many as phases 48.
• Each of the output pins 55 and each of the input pins 56 is here cubit.
• Each of the pins comprises a portion which extends in a radial plane, that is to say normal to the axis of rotation X.
• the connector 52 includes an intermediate power connection system 60 which connects one of the output pins to one of the input pins.
• This intermediate power connection system 60 here comprises six intermediate pins 61; each in a single piece in the form of a rectilinear tongue, which extend in a radial plane.
• each intermediate pin 61 has two free ends, one end called the machine side 65 connected to one of the output pins 55 and one end called the module side connected 66 to one of the input pins 56 of the module. electronic.
• the ends here are straight.
• Each intermediate spindle 61 is connected via its end machine side 65 to an output spindle 55 in the interior space of the electrical machine 10 and via its end on the module side 66 to an input spindle 56 in the interior space of the electronic module.
• No power connection part other than connector 52 is present in both interior spaces at the same time. Only the intermediate pins 61 extend both into the interior of the machine and into the interior of the module.
• the contact is surface between the intermediate pins 61 and the input pins 56 and the output pins 55.
• the pins can be secured to each other, as here, by screwing. As a variant, they can simply be pressed against each other without being integral with one another.
• the intermediate pins 61 are all aligned in the same direction. The same is true for the input pins and the output pins which are all aligned with each other as well.
• the intermediate pins 61 are here all concentrated on a predetermined angular portion whose angular opening is less, for example 45 degrees, for example 30 degrees.
• the partition 58 comprises a first opening 68 for the passage of the intermediate pins 61 from the outside to the inside of the interior space of the electrical machine.
• the box 9 includes a second opening 69 for the passage for the passage of the intermediate pins 61 from the outside to the inside of the interior space of the mold.
• the partition 58 comprises a first hatch 71 facing the output pins 55 and the intermediate pins 61 allowing, during assembly, to connect them together.
• This first hatch 71 is closed by a first cover 73 and a first airtight seal is provided to make the interior space airtight at the level of the first hatch 71.
• the first cover can be fixed on the partition 58, here screwing.
• the first hatch is oriented axially and it is perpendicular to the first opening 68.
• the housing 9 comprises a second hatch 72 facing the input pins 56 and the intermediate pins 61 allowing, during assembly, to connect them together.
• This second hatch 72 is closed by a second cover 74 and a second airtight seal is provided to make the interior space airtight at the level of the second hatch 72.
• the first cover can be fixed on the housing 9, here screwing,
• the second hatch is oriented axially and it is perpendicular to the second opening 69.
• the connector 52 finally comprises a closure part 80 closing the interior space of the electrical machine and the interior space of the electronic module.
• This closure part 80 external to the two interior spaces, is crossed by the intermediate pins 61 and obstructs both the first opening 68 and the second opening 69.
• the closure part 80 is a solid part in one piece of non-conductive material, for example plastic.
• the closing piece may be full.
• the machine side 65 and module side 66 ends are connected by a central portion 67 embedded in the closure part.
• Each intermediate pin 61 thus passes through a passage which is dedicated to it in the closure part and formed by overmolding. The pins thus hermetically pass through the closure part.
• the closure part 80 is oblong in the direction in which the intermediate pins 61 are aligned.
• the closure piece includes ears 82; here four, for the passage of the fastener of the connector 52 on the housing 9.
• the closing part comprises a flat closing surface on the machine side 85 which cooperates with a closing surface of the flat electric machine 89 and a flat closing surface on the module side 86 suitable for cooperate with a closing surface of the flat electronic module 90.
• the closure part 80 thus forms a spacer between the electronic module 5 and the electric machine 10.
• the closure surface of the electric machine 89 surrounds the first opening 68 and the closure surface of the module 90 surrounds the second opening 69.
• the closure part 80 comprises a machine side groove, not visible, opening onto the machine side closure surface and a module side groove 96 opening onto the module side closure surface, the two grooves each receiving a attached.
• Each of the two seals comes into contact with one of the closing surfaces of the machine 89 and the module 90.
• the closure part has a lateral flank 105 which extends between the two closure surfaces 85, 86.
• This lateral flank 105 comprises a plurality of recesses 106, substantially square, separated from each other. other lateral reinforcements 107.
• the connector 52 comprises two blocks, arranged on either side of the closure part 80 for the passage of an intermediate control connection system 98. These blocks are called machine side block 99 and module side block 100.
• the blocks here are integral with the closure piece and extend from the closure surfaces 85, 86 of the closure piece. These two blocks 99, 100 penetrate into the interior spaces of the machine and of the module in order to guide the intermediate control connection system.
• the intermediate pins 61 are here divided into two groups and the blocks are arranged between these two groups.
• the intermediate control connection system 101 here comprises a plurality of wires capable of transmitting control signals between the electronic machine and the electronic module in order to control the assembly 1.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Motor Or Generator Frames (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=72644403

Family Applications (1)

Country Status (4)

Families Citing this family (1)

Family Cites Families (3)

• 2020
  • 2020-06-23 FR FR2006546A patent/FR3111750A1/fr active Pending
• 2021
  • 2021-06-23 EP EP21735270.7A patent/EP4169149A1/fr active Pending
  • 2021-06-23 WO PCT/EP2021/067069 patent/WO2021259968A1/fr unknown
  • 2021-06-23 CN CN202180035925.8A patent/CN115668702A/zh active Pending

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