Classifications

• • 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
  • H02K11/33—Drive circuits, e.g. power electronics
• • 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
  • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
  • H02K11/21—Devices for sensing speed or position, or actuated thereby
  • H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
• • 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
  • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
  • H02K11/25—Devices for sensing temperature, or actuated thereby
• • 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
  • H02K2203/03—Machines characterised by the wiring boards, i.e. printed circuit boards or similar structures for connecting the winding terminations
• • 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
  • H02K2203/09—Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations

Definitions

• the present invention relates to an interconnection assembly for a rotating electrical machine as well as a rotating electrical machine equipped with such an interconnection assembly.
• a rotating electrical machine is an electromechanical device, preferably polyphase, and making it possible to convert electrical energy into mechanical energy, or vice versa.
• a known application of rotary electrical machines in the automotive field is the alternator-starter: a device for automatically stopping and restarting a thermal engine of a motor vehicle which makes it possible to reduce fuel consumption and pollution, for example during a short stop at a red light.
• a rotating electric machine includes:
• an electric motor comprising a rotor and a stator
• control system electrically controlling the electric motor.
• control system comprises a power module making it possible to define a value of an electric current flowing in each of the electric phases of the stator of the electric motor, and a control device comprising a control module making it possible to control the power module according to certain environmental parameters and data measured on the motor vehicle.
• the control system may also include a heat sink body and a cover to protect the electrical elements of the control system such as the power module and the control module.
• an interconnector which makes it possible to establish a correspondence between the ends of the phase windings of the stator and the power modules which are angularly offset relative to the ends of the phase windings of the stator.
• Patent application FR3056842 presents such an electric machine in which the ends of the stator phase windings are soldered to the terminals of an interconnector.
• the interconnector terminals are electrically linked to connection terminals via traces on which a support made of insulating material is overmolded.
• the connection terminals are projecting relative to the axial direction, that is to say in the same direction as the axis of rotation of the rotor of the electric motor.
• the connection terminals are electrically connected to the legs of the power modules.
• connection terminals with the legs of the power modules are carried out by means of a screw extending in a radial direction, that is to say a direction perpendicular to the axis of rotation of the rotor of the electric motor. .
• screwing is a particularly slow assembly process and requires complex tools to automate in particular because of the handling of the screws.
• screw connection is not removable, that is to say that it is not possible to separate the connection terminals from the legs of the power modules without dismantling or destroying the connection.
• An object of the present invention is to provide an interconnection assembly for a rotating electrical machine in order to at least largely respond to the above problems.
• the invention relates to an interconnection assembly for a rotary electrical machine comprising:
• a first interconnection module comprising a first terminal intended to be electrically connected to one end of phase winding of a stator of an electric motor and a first connection terminal electrically connected to the first terminal
• a second interconnection module comprising a second connection terminal electrically connected to a second terminal intended to be electrically connected to an electronic control module or to an electronic power module of the rotary electrical machine
• the first connection terminal and the second connection terminal being configured to come into electrical contact according to a removable connection in a connection direction, in particular the direction of the axis of rotation O of the electric motor.
• interconnection assembly facilitates the assembly of the control system of the rotary electrical machine on the electric motor. Indeed, this assembly does not require screws or any other non-removable electrical connection device to establish the electrical connection between the phase windings of the electric motor and the electronic modules of the control system. Assembly is faster and does not require complex tools.
• Such an interconnection assembly also facilitates the separation, for example during disassembly, of the electric motor control system. It is thus possible to replace the control system or the electric motor without complex or destructive disassembly.
• this removable connection makes it possible to reduce the bulk since it does not require an additional fixing system such as screws.
• the interconnection assembly allows greater flexibility in the manufacture of the rotary electrical machine. It is indeed possible to separately manufacture the control system, on which is fixed the second interconnection module, and the electric motor, on which is fixed the first interconnection module, then to assemble them in a last step.
• the electrical contact between the first connection terminal and the second connection terminal is ensured by an elastic conductive element.
• a conductive elastic element improves the electrical contact between the first connection terminal and the second connection terminal by allowing tolerances in the shape of the connection terminals and positioning between the larger connection terminals, these tolerances which can be compensated by the elasticity of the conductive elastic element.
• the electrical contact between the first connection terminal and the second connection terminal is ensured by a plug-in, one of the first connection terminal and the second connection terminal comprises a male connection member , the other of the first connection terminal and the second connection terminal comprises a female connection member.
• the female connection member comprises a cylindrical socket and the male connection member comprises a plug capable of being inserted into the cylindrical socket.
• the first terminal and the first connection terminal of the first interconnection module are overmolded in a first support made of an electrical insulating material, in particular a plastic material, and / or the second terminal and the second terminal of the second interconnection module are overmolded in a second support made of an electrical insulating material, in particular a plastic material.
• the first interconnection module comprises a plurality of first terminals and first connection terminals and / or the second interconnection module comprises a plurality of second terminals and second connection terminals.
• the first interconnection module comprises a sensor.
• the senor is a temperature sensor and / or an angular position sensor capable of measuring the angular position and / or the speed of a rotor of the electric motor.
• the first interconnection module and / or the second interconnection module comprises a magnetic core provided with an air gap where a Hall effect sensor is intended to be arranged in order to measure a current.
• the invention also relates to a rotary electric machine comprising:
• an electric motor comprising a stator comprising a body and a winding formed by a plurality of phase windings, each phase winding comprising at least one end electrically connected to the first terminals of the first interconnection module,
• an electronic control system for the rotary electrical machine electrically connected to the second terminals of the second interconnection module, and comprising a heat sink body receiving an electronic control module and / or an electronic power module,
• the first interconnection module being integral with the stator body and the second interconnection module being integral with the heat sink body.
• the heat sink body is closed by a cover, the interface zone between the heat sink body and the cover being flat.
• FIG. 1 shows a rotary electrical machine equipped with an interconnection assembly according to a first embodiment of the invention
• FIG. 2 represents the first interconnection module and the second interconnection module of the interconnection assembly of FIG. 1,
• FIG. 3 represents the second interconnection module of the interconnection assembly of FIG. 1,
• FIG. 4 represents the terminals and connection terminals of the first interconnection module of the interconnection assembly of FIG. 1,
• FIG. 5 represents the terminals and connection terminals of the second interconnection module of the interconnection assembly of FIG. 1,
• FIG. 6 represents an interconnection module of an interconnection assembly according to a second embodiment
• FIG. 7 schematically represents a section of the connection terminals of the first interconnection module and of the second interconnection module of the interconnection assembly of FIG. 1.
• FIG. 1 represents a rotary electric machine 1 comprising an electric motor 8 and a control system 2.
• the electric motor 8 comprises a rotor 3 with an axis of rotation O and a stator 4
• the stator 4 surrounds the rotor 3 with the presence of an air gap between the internal periphery of the stator 4 and the external periphery of the rotor 3.
• the stator 4 is fixedly mounted in a casing 26 provided with a front bearing and a rear landing. Room allowing the circulation of a heat transfer fluid can be carried out between the front bearing and the rear bearing of the casing 26 so as to improve the cooling of the electric motor 8.
• the rotary electrical machine 1 is able to operate in a generator mode in particular to supply energy to a battery and to the on-board network of a vehicle, and in an engine mode, not only, for example, to ensure the starting of 'a vehicle engine, but also, for example, to participate in the traction of the vehicle alone or in combination with the engine.
• the rotor 3 comprises for example a body in the form of a pack of sheets, permanent magnets being implanted in cavities of the body.
• the stator 4 comprises for example a body constituted by a pack of sheets as well as phase windings.
• the body can be formed by a stack of sheets of sheets held in the form of a pack by means of a suitable fixing system.
• the stator body is for example provided with teeth defining two by two of the notches for mounting the phase windings 5 forming the stator winding 4.
• Each phase winding 5 comprises a first end and a second end 12.
• the first end of the phase windings 5 is for example electrically connected to a neutral bar.
• the second end of the phase windings 5 is electrically connected to a first terminal 11 of a first interconnection module 6.
• the first interconnection module 6 further comprises:
• a first support 16 made of an insulating material, in particular a plastic material.
• the first terminal 11 and the first connection terminal 20 are for example overmolded in the first support 16.
• FIG. 4 represents the first terminal 11 and the first connection terminal 20 before the first support 16 is overmolded.
• Terminal 1 comprises a first end to which the first terminal 1 1 is fixed and a second end to which the second end 12 of the phase winding is electrically connected 5.
• This electrical connection is for example made by welding or soldering or crimping .
• the first connection terminal 20 and the first terminal 1 1 are for example linked by crimping.
• first connection terminal 20 and the first terminal 11 are force-fitted or welded or brazed or screwed.
• the first interconnection module 6 has for example a generally annular shape.
• the first interconnection module 6 is for example screwed or riveted to the rear bearing of the stator 26 of the electric motor 8.
• the first interconnection module 6 comprises for example six first terminals and six first connection terminals 20 as shown in FIG. 2 for a hexaphase electric motor 8.
• the control system 2 comprises a second interconnection module 7.
• the first terminal 1 1 may comprise between its first end and its second end an intermediate part.
• the intermediate part is for example in the form of a circular arc. It makes it possible to establish a correspondence between the second end 12 of the stator phase winding and a second connection terminal of the second interconnection module 7.
• the first interconnection module 6 and the second interconnection module 7 form an interconnection assembly 100.
• FIG. 2 represents the interconnection assembly according to a first embodiment.
• the second interconnection module 7 comprises a second terminal 14 and a second connection terminal 21.
• the second connection terminal 21 is electrically connected to the first connection terminal 20.
• the second interconnection module 7 further comprises a second support 15 made of an insulating material, in particular a plastic material.
• the second terminal 14 and the second connection terminal 21 are for example overmolded in the second support 15.
• FIG. 3 represents the second interconnection module 7.
• the second support 15 can comprise a rib 22 between two adjacent second connection terminals 21. Such a rib 22 makes it possible to stiffen the second interconnection module 7.
• FIG. 5 shows the second terminal 14 and the second connection terminal 21 before the second support 15 is overmolded.
• the second connection terminal 21 and the second terminal 14 are for example linked by crimping.
• the second connection terminal 21 and the second terminal 11 are force-fitted or welded or brazed or screwed.
• connection terminal 20 and the second connection terminal 21 are carried out by means of a removable connection, that is to say a connection which can be established or interrupted by simple relative movement between the first connection terminal 20 and the second connection terminal 21.
• This relative movement making it possible to establish or interrupt the electrical connection between the first connection terminal 20 and the second connection terminal 21 is for example a translation, in particular a translation along a connection direction such as the direction of the axis of O rotation of the rotor 3.
• the first connection terminal 20 comprises a male connection member, in particular a plug, for example a plug of cylindrical shape.
• the second connection terminal 21 comprises a female connection member, in particular a socket, for example a socket of cylindrical shape.
• the male connection member is capable of being inserted into the female connection member.
• the first connection terminal 20 comprises a female connection member and the second connection terminal 21 comprises a male connection member.
• the first interconnection module 6 comprises a plurality of first connection terminals 20 of which at least one first connection terminal comprises a male connection member and at least one other first connection terminal comprises a female connection member, and
• the second interconnection module 7 comprises a plurality of second connection terminals 21, a second connection terminal of which comprises a female connection member into which the male connection member of the at least first connection terminal is inserted, and another second connection terminal comprises a male connection member inserting into the female connection member of the at least other first connection terminal.
• the first interconnection module 6 comprises at least three first connection terminals 20. Each first connection terminal is electrically connected to a second connection terminal 21 of the second interconnection module 7.
• This electrical connection is made by an electrical contact between the first connection terminal 20 and the second connection terminal 21. This electrical contact is provided by a plug-in.
• a coding system can be provided.
• the polarization is enabled by an arrangement of the connection terminals which do not allow plugging in a single position.
• the rib 22 can also participate in the polarization. Indeed, the rib 22, disposed between the female connection members blocks the insertion of a male connection 20 between the female connection members 21. The insertion of the male connection member can only be obtained in the female connection members 21.
• the control system 2 further comprises:
• an electronic power module 10 capable of electrically supplying the electric motor 8
• an electronic control module 29 configured to generate at least one control signal enabling the power module 10 to be controlled.
• the electronic power module 10 has a heat exchange face with the heat sink body 18.
• the heat exchange between the electronic power module 10 and the heat sink body 18 can be achieved by means of a thermal conductive element such as a thermal paste, or a thermal glue.
• the heat sink body 18 may include an internal circuit allowing the circulation of a heat transfer liquid, in particular water.
• the circulation of a heat transfer fluid improves the cooling of the power module 10.
• the heat sink body 18 includes cooling fins promoting heat exchanges with the ambient air to cool the power module 10.
• the control system may further comprise a filtering capacity 28 making it possible to filter the current exchanged between the power module 10 and the vehicle on-board network.
• the filtering capacity 150 has a heat exchange face in thermal contact with the heat sink body 18 so as to promote the cooling of the filtering capacity in order to achieve a thermal transfer of the calories generated by each filtering capacity 150 with l 'ambiant air.
• the thermal contact can be made by means of a thermal conductive element such as a thermal paste, or a thermal adhesive.
• the second interconnection module 7 is for example screwed or riveted on the heat sink body 18.
• the power module 10 can comprise a plurality of power members, each power member comprising electronic components in electrical coupling with a metal substrate, preferably of the type of a bus bar 17 making it possible to electrically connect each power member of the module of power 10 to the second terminal 14 of the second interconnection module 7 and therefore to the phase winding 5 of the electric motor 8 via the first interconnection module 6.
• Each power unit forming the power module 10 is supplied by two bus bars making it possible to electrically connect the power module 10 to the vehicle electrical network.
• connection module 9 The electrical connection between the bus bar 17 and the second terminal 14 of the second interconnection module 7 is made by means of a connection module 9. This type of electrical connection is used in the control system shown in the figure 1.
• connection module 9 comprises a connection busbar 13 ensuring the electrical connection between the busbar 17 and the second terminal 14.
• the connection module 9 further comprises, around the connection busbar 13, a magnetic toroid 30 provided an air gap where a Hall effect sensor (not shown) is intended to be arranged in order to measure the phase current passing through the bus bar 13.
• connection module 9 can further comprise a third support, in particular a third overmolded support, making it possible to maintain the connection busbar 13 and the magnetic toroid 30 and to electrically isolate the connection busbar 13.
• FIG. 6 represents a second interconnection module 70 of an interconnection assembly according to a second embodiment.
• the second interconnection module 70 performs the functions of the connection module 13.
• the connection module 13 is no longer necessary.
• the second interconnection module 70 comprises a second terminal 24 and a second connection terminal 21.
• the second connection terminal 21 is, as in the first embodiment, intended to be electrically connected to the first connection terminal 20.
• the second interconnection module 70 further comprises, around the second terminal 24, a magnetic toroid 23 provided with an air gap where a Hall effect sensor (not shown) is intended to be arranged in order to measure the current of the passing phase. via the second terminal 24.
• the second interconnection module 70 further comprises a second support 150 made of an electrical insulating material, in particular a plastic material.
• the second support 150 is for example overmolded on the second terminal 24, the second connection terminal 21 and the magnetic toroid 23.
• the second terminal 24 is for example directly connected to the bus bar 17. This connection is for example made by soldering or soldering the second terminal 24 to the bus bar 17 of the power module 10.
• the second support 150 has an opening 25 allowing for example the passage of a control pin between the power module and the electronic control module 29.
• the interface zone between the heat sink body 18 and the cover 19 is flat.
• the first interconnection module 6 comprises a sensor.
• the sensor is for example a temperature sensor and / or an angular position sensor able to measure the angular position and / or the speed of the rotor 3 of the electric motor 8.
• FIG. 7 represents a section AA of a male connection member of a first connection terminal 20 plugged into a female connection member of a second connection terminal 21.
• the male connection member is for example a plug and the female connection member is for example a socket of cylindrical shape.
• a conductive elastic element in particular a spring 27, allows the electrical connection between the male connection member and the female connection member.
• the spring 27 is housed in the female connection member.
• the spring 27 is held in the female connection member in the direction of insertion of the male connection member in the female connection member. This holding is for example achieved using a flange formed at the entrance to the entry of the female connection member.
• the spring 27 is positioned on an external surface of the male connection member.
• the spring 27 is held on the male connection member in the direction of insertion of the male connection member in the female connection member. This holding is for example achieved using a flange formed on the outer surface of the end of the male connection member.
• the spring 27 is for example a polygonal spring made from a metal sheet or a wave-shaped spring made from a metal sheet.

Landscapes

• Engineering & Computer Science (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Power Engineering (AREA)
• Motor Or Generator Frames (AREA)
• Windings For Motors And Generators (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=67185131

Family Applications (1)

Country Status (4)

Families Citing this family (3)

Family Cites Families (8)

• 2018
  • 2018-12-20 FR FR1873511A patent/FR3091062B1/fr active Active
• 2019
  • 2019-12-19 WO PCT/EP2019/086499 patent/WO2020127858A1/fr not_active Ceased
  • 2019-12-19 CN CN201980078256.5A patent/CN113169634A/zh active Pending
  • 2019-12-19 EP EP19835227.0A patent/EP3900165A1/de active Pending

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