EP3891872A1 - Machine electrique tournante comprenant un dispositif de refroidissement - Google Patents
Machine electrique tournante comprenant un dispositif de refroidissementInfo
- Publication number
- EP3891872A1 EP3891872A1 EP19809504.4A EP19809504A EP3891872A1 EP 3891872 A1 EP3891872 A1 EP 3891872A1 EP 19809504 A EP19809504 A EP 19809504A EP 3891872 A1 EP3891872 A1 EP 3891872A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling device
- wall
- electric machine
- internal
- external wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/006—Structural association of a motor or generator with the drive train of a motor vehicle
-
- 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
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
- B60L50/16—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with provision for separate direct mechanical propulsion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/50—Drive Train control parameters related to clutches
- B60L2240/507—Operating parameters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
Definitions
- the field of the present invention is that of cooling devices for rotating electrical machines and more particularly for rotating electrical machines intended to be integrated in a hybrid powertrain of a motor vehicle.
- a known cooling device comprises an internal wall and an external wall delimiting an internal volume in which circulates a coolant, the cooling device extending circumferentially around an axis of rotation of the rotary electric machine, the internal wall and the external wall being parallel to each other along the axis of rotation of the rotary electric machine.
- the internal volume takes the form of a hollow tube with a first axial end and a second axial end having an identical radial dimension.
- the cooling device When the rotating electric machine is housed in a clutch housing, the cooling device is installed radially inside the housing. Thus, it is necessary that the cooling device, and more particularly the external wall of the cooling device, can be housed inside the bell.
- the partition which delimits the bell may include a reduction in its radial dimension, along the axis of the rotary electric machine.
- the known cooling devices are not adapted to take account of this reduction in size, which generates a limitation of the internal volume which negatively impacts the capture of the calories generated by the rotary electric machine.
- the object of the present invention is to propose a cooling device making it possible to respond at least in part to the drawbacks mentioned above and to lead in addition to other advantages. So this The object of the invention is to allow the internal volume of the cooling device to be increased, while allowing the cooling device to be inserted into a bell housing the rotary electric machine. On the other hand, the invention aims to promote the circulation of the cooling fluid inside the internal volume, in particular to promote the dissipation of the calories generated by the rotary electrical machine by the cooling fluid.
- a rotary electrical machine comprising a stator and a rotor movable in rotation about an axis of rotation relative to the stator, the rotary electrical machine comprising a cooling device at the periphery of stator and rotor, the cooling device extending circumferentially around the axis of rotation and comprising an internal wall and an external wall, the internal wall and the external wall defining at least partially an internal volume in which a fluid circulates cooling, the internal volume being defined by a first thickness measured at a first axial end of the cooling device and by a second thickness measured at a second axial end of the cooling device, the first thickness and the second thickness being different.
- the cooling device makes it possible to dissipate the calories generated by the rotary electric machine, and in particular by the rotation of the rotor relative to the stator due to the passage of an electric current in electric coils of the stator causing the formation of a magnetic field responsible for the rotation of the rotor relative to the stator.
- the rotor is coupled in rotation to a drive shaft, thereby allowing the drive shaft to rotate about the axis of rotation during the rotation of the rotor.
- the cooling device is connected to a cooling circuit, forming a loop, allowing the circulation of a cooling fluid in the cooling circuit, the cooling fluid transferring the calories generated by the rotary electric machine to the circuit of cooling.
- the first axial end of the cooling device is for example thicker, measured radially, than the second axial end of this cooling device.
- the outer wall is located radially outside the inner wall.
- the outer wall and the inner wall both extend circumferentially around the axis of rotation.
- the first axial end and the second axial end of the cooling device are defined relative to the axis of rotation of the rotary electrical machine.
- the first end and the second end are oriented respectively towards a front zone and a rear zone of the rotary electric machine.
- the first thickness is measured between an internal face of the internal wall and an internal face of the external wall, at the level of the first axial end.
- the second thickness is measured between the internal face of the internal wall and the internal face of the external wall, at the level of the second axial end.
- the internal face of the internal wall and the internal face of the external wall are oriented towards the interior of the internal volume defined at least partially by the internal wall and the external wall.
- the internal faces referred to here are those which are in contact with the cooling fluid when the latter is present in the internal volume.
- the cooling device comprises a conical portion which extends along the axis of rotation. It is thus understood that a portion of the outer wall is not parallel to the inner wall, and converges thereon.
- the second thickness is less than the first thickness.
- the radial dimension of the cooling device at the second portion is less than the radial dimension of the cooling device at the first portion, facilitating the insertion of the cooling device into a clutch housing of the gearbox.
- the rotary electric machine is intended to be housed in a clutch bell, in particular according to an axial translational movement, the second axial end of the cooling device being intended to be oriented towards a bottom of an internal space delimited by a partition of the clutch bell.
- the second thickness may be zero.
- This configuration allows the internal volume to be increased by extending the cooling device axially, thus promoting the capture of calories from an axial fringe of the stator.
- This configuration also makes it possible to reduce the thickness of the cooling device along the axis of rotation of the rotary electric machine, thus allowing the insertion of the rotary electric machine, and more particularly of the cooling device, in a bell of clutch of a gearbox.
- This configuration makes it possible to promote the cooling of the rotary electrical machine by modifying the circulation of the cooling fluid circulating inside the internal volume.
- the modification of the thickness of the cooling device between the first thickness and the second thickness makes it possible to generate a turbulent flow of the cooling fluid in comparison with a known configuration in which the cooling device comprises a single thickness, the flow of the cooling fluid circulating inside the internal volume of a known cooling device then being a laminar flow.
- the cooling device advantageously comprises at least one of the improvements below, the technical characteristics forming these improvements can be taken alone or in combination:
- the internal wall and the external wall are directly intersecting between them.
- the rotary electrical machine comprises a point of intersection between the internal wall and the external wall.
- the second thickness is zero;
- the cooling device comprises a conical portion which extends along the axis of rotation. This conical portion is the area of the internal volume which follows the profile of the partition of the clutch bell;
- the outer wall includes an axial extension which is supported against the inner wall.
- This configuration thus allows the internal wall and the external wall, in order to ensure the tightness of the cooling device, and more particularly of the internal volume of the cooling device in which the cooling fluid circulates.
- the axial extension makes it possible to increase the contact surface between the internal wall and the external wall, and more particularly that of a second portion of the external wall.
- the internal wall and the external wall are joined together by welding or brazing.
- An increase in the contact surface between the internal wall and the external wall due to the axial extension makes it possible to increase the surface of welding or soldering;
- the outer wall comprises a first portion and a second portion, the first portion being substantially parallel to the inner wall and the second portion being in contact with the inner wall.
- the first portion and the second portion are positioned relative to each other in the axial orientation.
- the second portion extends the first portion.
- the first portion forms an angle of inclination with the second portion, said angle of inclination being strictly greater than 90 ° and strictly less than 180 °.
- the angle of inclination is between 135 ° and 175 °;
- the inner wall and the outer wall are welded or brazed together.
- the inner wall and the outer wall are in particular welded or brazed together at the first axial end and / or the second axial end.
- a radial extension flange may be provided interposed between the internal wall and the external wall, said flange being welded or brazed both on the internal wall and on the outer wall.
- This configuration ensures the tightness of the cooling device, and more particularly of the internal volume defined between the external wall and the internal wall.
- the internal wall is welded or brazed to an extension of the external wall.
- the internal volume is sealed by a sealing device, and in particular by a seal, located between the inner wall and the outer wall, and in particular at the first axial end and / or the second axial end;
- the rotor is located radially inside the stator.
- the stator is inserted radially between the rotor and the cooling device.
- This configuration makes it possible to promote the cooling of the rotary electric machine, and in particular of the stator, the electric coils of the stator producing calories when an electric current flows through them in order to set the rotor in motion relative to the stator.
- the cooling device, and in particular the internal wall of the cooling device is hot-fitted on the stator, promoting the heat exchange between the stator and the cooling device and thus improving the transport of the calories generated by the stator; a maximum axial dimension of the internal wall of the cooling device is at least equal to a minimum axial dimension of the stator.
- the axial dimension of the internal wall is measured between the first axial end and the second axial end of the cooling device.
- the axial dimension of the stator is measured between a first axial end of the stator and a second axial end of the stator located opposite the stator relative to the first axial end of the stator, in the axial orientation.
- the invention also relates to a clutch bell of a gearbox, comprising a partition delimiting an internal space of the clutch bell which house the rotor, the stator and the cooling device, a first portion of the external wall. of the cooling device being substantially parallel to a first part of the partition of the clutch housing, a second portion of the external wall of the cooling device being substantially parallel to a second part of the partition of the clutch housing.
- the first part and the second part of the partition are arranged relative to each other in the axial orientation. This configuration thus makes it possible to maximize the internal volume of the cooling device, and therefore to promote the dissipation of the calories generated by the stator, by increasing the axial dimension of the cooling device while decreasing the radial dimension of the latter at the level of the second portion of the external wall, so that the second portion cooperates with the second portion of the bulkhead of the clutch housing.
- the clutch bell referred to above may comprise a connection point between the first part and the second part of the partition of the clutch bell which is substantially aligned axially, and along a straight line perpendicular to the axis of rotation, with a junction point between the first portion and the second portion of the external wall of the cooling device.
- a clutch module can be housed in the clutch housing, in particular in the rotary electrical machine.
- the invention also covers a gearbox for a hybrid powertrain of a motor vehicle, comprising a gearbox casing, at least one set of gears and a rotary electric machine as described in this document, or a clutch bell as detailed above, the gear assembly and the rotary electrical machine both being housed in the gearbox housing.
- the invention finally covers a hybrid powertrain of a motor vehicle, comprising a rotary electric machine as described in the present document, a clutch bell as described above or a gearbox as described above, the hybrid powertrain further comprising an internal combustion engine and a clutch module.
- the rotating electric machine makes it possible, for example, to ensure the propulsion of the vehicle, independently or in combination with the internal combustion engine, or even the starting of the internal combustion engine, or else to function as a generator by producing energy.
- electrical intended to be stored in an electrical energy storage device such as an electric battery of the vehicle, from the mechanical energy produced by the internal combustion engine or by the inertia of the vehicle.
- the rotary electrical machine is associated with an electrical energy storage device.
- the coolant is a coolant. More particularly, the coolant is an aqueous solution comprising ethylene glycol.
- an aqueous solution comprising ethylene glycol allows the use of a cooling circuit comprising such a cooling fluid in a vehicle intended to be used or stored by negative atmospheric temperatures, the ethylene glycol allowing to decrease the solidification temperature of the aqueous solution.
- the vehicle is a motor vehicle. More particularly, the motor vehicle is a car or a truck.
- the hybrid powertrain according to the invention allows the movement of the motor vehicle using the rotating electric machine and / or the internal combustion engine as the means of propulsion of the motor vehicle. This configuration makes it possible to have a hybrid powertrain whose rotary electric machine has the advantages conferred by the cooling device.
- the hybrid powertrain advantageously comprises at least one of the improvements below, the technical characteristics forming these improvements can be taken alone or in combination:
- the electrical energy storage device is an electric battery;
- the hybrid powertrain includes a clutch module, said second clutch module in comparison with the clutch module, said first clutch module coupling the rotary electric machine and the internal combustion engine, the second module clutch being configured to couple the gearbox with the rotating electric machine and / or the internal combustion engine;
- the second clutch module comprises a first clutch and a second clutch respectively coupled to the rotary electrical machine and to the internal combustion engine;
- the first clutch and the second clutch are arranged in a radial configuration, in which one of the first clutch or the second clutch is located radially inside the other. So alternatively, the first clutch and the second clutch are arranged in an axial configuration, in which one of the first clutch or the second clutch is located axially forward relative to the other; the second clutch module is a wet clutch module, in which a liquid provides lubrication and / or cooling of the components of the second clutch module. Alternatively, the second clutch module is a dry clutch module;
- the internal combustion engine is a spark-ignition engine, also known as a “gasoline engine”, or a compression-ignition engine, also known as a “diesel engine”.
- FIG. 1 illustrates a sectional view of an exemplary embodiment of a rotary electrical machine according to the first aspect of the invention
- FIG. 2 illustrates a partial view of a section of a first embodiment of a rotary electrical machine according to the first aspect of the invention housed in a clutch bell;
- FIG. 3 illustrates a partial view of a section of the rotary electric machine illustrated in Figure 2 and focused on the cooling device;
- FIG. 4 illustrates a partial view of a section of a second embodiment of a rotary electrical machine according to the first aspect of the invention
- FIG. 5 illustrates a schematic representation of an embodiment of a hybrid powertrain according to the second aspect of the invention.
- Figure 1 illustrates a sectional view of an exemplary embodiment of a rotary electrical machine 1 according to the first aspect of the invention.
- the rotary electric machine 1 comprises a stator 2 and a rotor 4 movable in rotation about an axis of rotation O relative to the stator 2.
- the rotary electric machine 1 also comprises a cooling device 6, the stator 2 being inserted radially between the rotor 4 and the cooling device 6.
- the stator 2, the rotor 4 and the cooling device 6 extend circumferentially over 360 ° around the axis of rotation O.
- the stator 2 comprises a plurality of electric coils 8 regularly angularly distributed around the axis of rotation O, each electric coil 8 being formed of a metal tooth 10 around which a metal wire 12 is surrounded.
- each electric coil 8 being formed of a metal tooth 10 around which a metal wire 12 is surrounded.
- the passage of electric current to the plurality of electric coils 8 of the rotary electric machine 1 produces calories, the cooling device 6 allowing the dissipation of these calories.
- the cooling device 6 thus comprises an internal wall 14 and an external wall 16 situated outside the internal wall 14, the internal wall 14 and the external wall 16, extending circumferentially around the axis of rotation O and defining an internal volume 18 in which a coolant circulates. Indeed, the internal volume 18 is connected to a cooling circuit forming a loop and allowing the circulation of a cooling liquid.
- the cooling device 6 is connected to the cooling circuit by a first connector 20 and by a second connector 22 both communicating with the internal volume 18.
- the cooling device 6 comprises a wall 24 extending radially between the internal wall 14 and the external wall 16, the wall 24 being inserted circumferentially between the first connector 20 and the second connector 22.
- the wall 24 requires the liquid to cooling circulating in the internal volume so that the coolant circulates between the first connector 20 and the second connector 22 by making a path as long as possible circumferentially, so that the coolant discharges a maximum of calories generated by the electric machine rotary 1, thus favoring the cooling of the rotary electric machine 1.
- the rotary electric machine 1 comprises a housing 23 located radially inside the rotor 4, the housing 23 being intended to receive a clutch module making it possible in particular to couple the rotary electric machine 1 to an internal combustion engine of a chain traction system of a motor vehicle.
- the rotating electric machine makes it possible, for example, to ensure the propulsion of the motor vehicle independently or in collaboration with the internal combustion engine.
- FIG. 2 illustrates a partial view of a section of an exemplary embodiment of a rotary electrical machine 1 in accordance with the first aspect of the invention housed in a clutch housing 30.
- the rotary electrical machine 1 illustrated in FIG. 2 is the rotary electrical machine 1 illustrated in FIG. 1, the latter being here represented once housed in the clutch housing 30 of a gearbox.
- the clutch housing 30 is located radially outside the cooling device 6, and more particularly outside the outer wall 16 of the cooling device.
- the clutch housing 30 is delimited by a partition 32 forming an internal space 34 housing the cooling device 6, the stator 2 and the rotor 4 of the rotary electrical machine 1.
- the internal space 34 is also intended, in the illustrated embodiment, to house the clutch module with which the rotary electrical machine 1 is associated.
- the rotating electrical machine 1 comprises an electrical module 36 housed in the clutch housing 30 and allowing the electrical supply of the electrical coils 8.
- the rotating electrical machine 1 defines a direction "Motor »Towards the motor and a direction towards the BDV gearbox along the axis of rotation O, the motor being oriented axially towards the stator 2 and the BDV gearbox being axially oriented towards the electric module 36, that is to say say opposite of the rotary electrical machine 1 with respect to the motor along the axis of rotation O.
- FIG. 3 illustrates a partial view of a section of the rotary electric machine 1 illustrated in FIG. 2 and focused on the cooling device 6.
- the internal wall 14 of the cooling device 6 is delimited axially towards the front "Motor" by a first flange 40 of radial elongation.
- the first flange 40 is delimited radially by a bearing 42 of axial elongation extending forwards “Motor” from the first flange 40, the bearing 42 being delimited axially by a second flange 44 of radial elongation extending towards the exterior from the bearing surface 42.
- the internal wall 14, the first flange 40, the bearing surface 42 and the second flange 44 are produced by stamping.
- the external wall 16 comprises a first portion 46 and a second portion 48 arranged axially with respect to one another.
- the first portion 46 is located towards the front "Motor" relative to the second portion 48, the external wall 16 thus forming a junction point 80 between the first portion 46 and the second portion 48.
- the first portion 46 of the outer wall 16 is substantially parallel to the inner wall 14, while the second portion 48 of the outer wall 16 extends both axially backwards "BDV" and radially inward from a rear termination 38 of the first portion 46, so that a rear termination of the second portion 48 is radially supported on the internal wall 14.
- the external wall 16 comprises an angle of inclination 47 formed between the first portion 46 and the second portion 48, said inclination angle 47 being strictly greater than 90 ° and strictly less than 180 °, said inclination angle 47 preferably being between 135 ° and 175 °. In the illustrated embodiment, the angle of inclination 47 measures approximately 150 °.
- the cooling device 6 comprises a first thickness 52 at the level of a first axial end 54 of the cooling device 6 and a second thickness 56, different from the first thickness, measured at level of a second axial end 58 of the cooling device 6, the first thickness 52 being measured between a first internal face 60 of the internal wall 14 and a second internal face 62 of the first portion 46 of the external wall 16, the second thickness 56 being measured between the internal face 60 of the internal wall 14 and a third internal face 64 of the second portion 48 at the level of the second axial end 58 of the cooling device 6, the first internal face 60, the second internal face 62 and the third internal face 64 each being oriented radially towards the internal volume 18 of the cooling device 6.
- the second thickness 56 is zero.
- the third internal face 64 of the second portion 48 of the external wall 16 bears radially against the first internal face 60 of the internal wall 14.
- the internal wall 14 and the external wall 16 are directly intersecting between them , forming a point of intersection 66.
- This configuration makes it possible to promote the insertion of the rotary electrical machine 1 into the internal space 34 delimited by the clutch housing 30, in particular by an axial translational movement from the front AV rearward AR, while allowing the internal volume 18 of the cooling device 6 to be increased.
- the cooling device 6 thus comprises a longitudinal part which, seen in a section, has a conical section.
- the front termination 69 and the bearing 42 are welded to one another.
- the external wall 16 includes an axial extension 68 extending the second portion 48 towards the rear “BDV”.
- the extension 68 is radially in abutment against the internal wall 14.
- the extension 68 thus makes it possible to increase the contact surface between the internal wall 14 and the external wall 16 at the second axial end 58 of the device. cooling 6, promoting in particular the welding or brazing of the external wall 16 and the internal wall 14 therebetween.
- the extension 68 and the second portion 48 of the external wall 16 are produced by continuity of material.
- the partition 32 of the clutch housing 30 comprises a first part 70 and a second part 72, the first part 70 being oriented axially towards the front AV relative to the second part 72.
- the first part 70 is substantially parallel to the first portion 46 of the external wall 16 of the cooling device 6.
- the second part 72 is inclined radially relative to the first part 70, the second part 72 and the first part thus not being parallel to each other.
- the first part 70 and the second part 72 are intersecting with one another, and more particularly directly intersecting with each other.
- the partition 32 includes a connection point 82 between the first part 70 and the second part 72.
- the second part 72 of the partition 32 is substantially parallel to the second portion 48 of the external wall 16 of the cooling device 6. More particularly , a fourth internal face 74 of the first part of the partition 32 is substantially parallel to the third internal face 64 of the second portion 48 of the external wall 16.
- the junction point 80 is axially aligned with the connection point 82.
- a straight line D1 perpendicular, or substantially perpendicular, to the axis of rotation O of the electric machine turning 1 passes through the junction point 80 and through the connection point 82.
- the second flange 44 is axially bearing backwards “BDV” against the partition 32 of the clutch housing 30.
- the second flange 44 comprises a groove 84 extending circumferentially relative to the axis of rotation O and intended to receive a sealing device, in order to ensure the sealing of the internal space 34 defined by the clutch housing 30.
- Figure 4 illustrates a partial view of a section of a second embodiment of a rotary electric machine 1 according to the first aspect of the invention.
- the second embodiment differs from the first embodiment illustrated in FIGS. 2 and 3 in that the second thickness 56 is non-zero, while being different from the first thickness 52. More particularly, the second thickness 56 is less than the first thickness 52 allowing in particular the insertion of the rotor 4, the stator 2 and the cooling device 6, by axial translation from the front “MOTOR” towards the rear “BDV”, inside the internal space 34 formed by the clutch housing 30.
- the second portion 48 of the external wall 16 and the internal wall 14 of the cooling device 6 are connected together by a side wall 49 extending radially between the internal wall 14 and the second portion 48 of the external wall 16.
- the internal wall 14 and the external wall 16 are indirectly intersecting with each other, the cooling device 6 not comprising any point of intersection between the inner wall 14 and the outer wall 16.
- FIG. 5 illustrates a schematic representation of an exemplary embodiment of a hybrid powertrain 100 in accordance with the second aspect of the invention.
- the hybrid traction chain 100 is in particular intended to be integrated into a motor vehicle.
- the hybrid traction chain 100 illustrated in FIG. 5 comprises a rotary electric machine 1 in accordance with the first aspect of the invention, an internal combustion engine 106 and a first clutch module 102 allowing coupling between the rotary electric machine 1 and the internal combustion engine 106.
- the hybrid traction chain 100 comprises an electrical energy storage device 104, such as an electric battery, associated with the rotary electrical machine 1, and more particularly with the stator 2 of the rotating electric machine 1.
- the rotary electrical machine 1 and the internal combustion engine 106 are coupled to a gearbox 110 by a second clutch module 108, the second clutch module 108 comprising in particular a first clutch and a second clutch respectively coupled to the rotary electrical machine 1 and with internal combustion engine 106.
- the hybrid traction chain 100 makes it possible, for example, to ensure the propulsion of the motor vehicle by the internal combustion engine 106 and / or the rotary electric machine 1.
- the hybrid traction chain allows the production of electrical energy by the rotating electrical machine 1 from the mechanical energy produced by the internal combustion engine 106, the rotating electrical machine 1 then operating as a generator, said electrical energy being intended to be stored in the electrical energy storage device 104 in order to be able to be used by a peripheral of the motor vehicle, or also in order to be used subsequently by the rotary electric machine 1, for example during a driving phase requiring additional energy to the energy supplied by the internal combustion engine 106.
- the first clutch module 102 is housed inside the rotary electrical machine 1.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Motor Or Generator Cooling System (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1872218A FR3089364B1 (fr) | 2018-12-03 | 2018-12-03 | Machine électrique tournante comprenant un dispositif de refroidissement |
| PCT/EP2019/083362 WO2020114985A1 (fr) | 2018-12-03 | 2019-12-02 | Machine electrique tournante comprenant un dispositif de refroidissement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3891872A1 true EP3891872A1 (fr) | 2021-10-13 |
Family
ID=66218214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19809504.4A Pending EP3891872A1 (fr) | 2018-12-03 | 2019-12-02 | Machine electrique tournante comprenant un dispositif de refroidissement |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3891872A1 (fr) |
| FR (1) | FR3089364B1 (fr) |
| WO (1) | WO2020114985A1 (fr) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2711281A1 (fr) * | 1993-10-13 | 1995-04-21 | Valeo Equip Electr Moteur | Alternateur de véhicule automobile à refroidissement amélioré. |
| US20160118858A1 (en) * | 2013-06-14 | 2016-04-28 | Mitsubishi Electric Corporation | Rotary electric machine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10141890A1 (de) * | 2001-08-28 | 2003-03-20 | Bosch Gmbh Robert | Elektrische Maschine |
| CN103069696B (zh) * | 2010-07-01 | 2016-09-21 | 艾里逊变速箱公司 | 用于冷却混合动力电机的方法 |
| JP2017070085A (ja) * | 2015-09-30 | 2017-04-06 | Ntn株式会社 | 電動機 |
-
2018
- 2018-12-03 FR FR1872218A patent/FR3089364B1/fr active Active
-
2019
- 2019-12-02 EP EP19809504.4A patent/EP3891872A1/fr active Pending
- 2019-12-02 WO PCT/EP2019/083362 patent/WO2020114985A1/fr not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2711281A1 (fr) * | 1993-10-13 | 1995-04-21 | Valeo Equip Electr Moteur | Alternateur de véhicule automobile à refroidissement amélioré. |
| US20160118858A1 (en) * | 2013-06-14 | 2016-04-28 | Mitsubishi Electric Corporation | Rotary electric machine |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2020114985A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3089364B1 (fr) | 2023-04-28 |
| FR3089364A1 (fr) | 2020-06-05 |
| WO2020114985A1 (fr) | 2020-06-11 |
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