Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K1/00—Details of the magnetic circuit
  • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
  • H02K1/12—Stationary parts of the magnetic circuit
  • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
  • H02K1/187—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to inner stators
• • 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
  • H02K11/01—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields, i.e. structural association with shields
  • H02K11/014—Shields associated with stationary parts, e.g. stator cores
  • H02K11/0141—Shields associated with casings, enclosures or brackets
• • 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
  • H02K11/02—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for suppression of electromagnetic interference
• • 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
  • H02K11/40—Structural association with grounding devices
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
  • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
  • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
  • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
  • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
  • H02K21/227—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos having an annular armature coil
• • 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
  • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
  • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
  • H02K5/1735—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at only one end of the rotor
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K2211/00—Specific aspects not provided for in the other groups of this subclass relating to measuring or protective devices or electric components
  • H02K2211/03—Machines characterised by circuit boards, e.g. pcb

Definitions

• the present invention relates to the field of electric motors, and in particular to that of electronically commutated motors. More specifically, it relates to air drive devices in motor vehicles comprising such electric motors.
• An air supply device equipped with an electric motor according to the invention is, for example, used in a ventilation system, heating and / or air conditioning of a motor vehicle.
• Electric motors with electronic commutation or DC brushless motors (also known under the English name of "brushless") comprise a rotor and stator assembly, each of these components being carrier of electromagnetic elements which in interaction generates
• the movement of the rotor relative to the stator The rotor and stator are mounted independently one from the other in said engine, and it is necessary to ensure that the relative positioning of these two components is correct for optimum engine operation. These two components, in operation, generate electromagnetic radiation that can disrupt the
• the present invention falls within this context and it aims at providing an electric motor and a drive device of partner air which allow to limit the propagation of electromagnetic waves out of the air drive device.
• air delivery device there is a device for sucking and / or blowing air.
• the air drive device is of the type having an impeller rotated by an output shaft of an electric motor with electronic commutation, with the engine consisting of at least one rotor to rotate with the output shaft and adapted to rotate around a stator.
• the stator has an annular shape with a central wall which delimits the contour of an internal bore through which said output shaft passes, and it further comprises a plurality of teeth radially arranged in a star since the outer face of said central wall and each bearing a magnetic coil generating an electromagnetic field, Iesdites having teeth at their distal end, remote from the central wall, metal plates which extend substantially parallel to the axis of the output shaft.
• each metal plate is arranged such that a passage area for the coil winding is formed between two adjacent metal plates.
• the rotor arranged about the stator, is carrying at least one permanent magnet which in interaction with Iesdites current supplied coils generates a rotational movement of the rotor around the stator.
• the stator in particular the internal face of the central wall of said stator, is in contact with a support means around which the stator is mounted, said support means being conductive and connected electrically to an electrical ground, and is provided on the other hand at least one screen is arranged adjacent to the stator, said shield being also
• This arrangement allows the formation of a conductive enclosure connected to electrical ground, and thus maintained at a fixed potential, so as to form a shield adapted to confine within the air drive device the electric field created by the current switching in the stator coils generates 20 electric fields
• the internal face of the central wall defining said internal bore 25 has at least one rib which extends radially inwardly of the bore;
• this rib has two lateral faces each extending said inner face of the central wall and a contact face adapted to be in contact with the support means;
• the contact face is curved such that the curvature of the contact face is defined by a circle centered on the axis of the internal bore; - The at least one rib is extended, substantially in the direction of the axis of the internal bore, by a lug which protrudes from the contact face;
• the internal face of the central wall defining the central bore comprises at least three ribs disposed in a regular angular distribution
• the internal bore of the stator has a frustoconical shape, such that the bore has a larger diameter at its end facing the plate than at its end facing the rotor.
• the support means is formed of a single piece comprising a barrel and a plate, the barrel, around which is mounted the stator, and in which is rotatably mounted said integral output shaft of the rotor, extending projecting from the plate arranged transversely on one side of the stator opposite to the side of said rotor.
• the output shaft of said motor is rotatably mounted within the barrel by means of bearings.
• the platinum support means may form a heat sink holder of a card control electronics 20, including the feeding of the stator coils, the electronic control card then being arranged on the side of the plate facing away of the drum.
• the screen According to a second series of characteristics, taken alone or in combination with each other and with the first series of characteristics mentioned above, it will be possible for the screen to be arranged transversely to the output shaft, between the rotor and the stator. .
• the screen extends radially over the entire diameter of the stator.
• the screen has a substantially flat annular shape, pierced at its center with a bore to be traversed by the motor output shaft;
• the screen is fixed on the stator by at least one fixing screw able to cooperate with a hole formed in the stator; - the internal bore of the stator comprises two distinct portions by modifying the internal diameter of the central wall defining said internal bore, a first portion of larger diameter extending axially from the edge disposed in the vicinity of the screen until a shoulder edge
• the screen comprises at least one tab which extends substantially perpendicularly to the edge defining the central bore of the screen, and whose free end has a support edge, so that the leg comes into contact with the edge î o shoulder by the support edge when the screen is in stator covering position;
• the support edge is arranged to allow passage to the fixing screw body in the fixing hole and be pressed against the shoulder edge by the screw head;
• Three fixing holes are regularly distributed at 120 ° around the perimeter of the internal bore of the stator;
• the screen is connected to a substantially zero electrical potential through said at least one screw which extends substantially parallel to the engine output shaft, passing through said stator to come into
• the stator has at least one axial boss disposed projecting from the inner face of the central wall defining the internal bore of said stator, said boss being pierced axially of the fixing hole adapted to be traversed by the at least one fixing screw;
• the screen is made of an electrically conductive material, which may be an example of aluminum.
• Provision may also be the display which have been the object of the second series of above given characteristics is a first screen portion of a cover of the stator further comprising a second screen disposed in cover 30 of the stator axial side of the stator opposite to the side covered by the first screen, between said stator and the support means.
• this second screen may extend transversely or parallel to the output shaft of the motor.
• the second screen extends radially over the entire diameter of the stator; the second screen may also present a substantially flat annular shape, pierced at its center to be traversed by the motor output shaft. And the second screen can be fixed on the stator.
• this second screen extends substantially in the extension of I o plates carried on the periphery of said stator.
• the second screen may then have an annular ring shape, and be fixed on the stator or directly on the plate.
• the second screen is made of an electrically conductive material, for example aluminum.
• the present invention also relates to a heating system, 15 ventilation and / or air conditioning of a motor vehicle comprising at least one forced air device in accordance with what has been described previously.
• FIG. 1 is an exploded perspective view of an air delivery device according to the invention
• FIG. 2 diagrammatically illustrates an air pumping device comprising, according to the invention, means for radial confinement of the electromagnetic radiations;
• FIG. 25 - Figure 3 is a perspective view of a stator fitted to an electric motor in an air drive device according to the invention.
• FIG. 4 is a partial view from above of the stator of FIG. 3;
• FIG. 5 schematically illustrates an air pumping device comprising, according to the invention, means for radial confinement of
• FIG. 6 is a perspective view of a stator and two-screen axial confinement means, according to a first embodiment
• FIG. 7 schematically illustrates an air-blast device 5 comprising, according to the invention, means for radial confinement of the electromagnetic radiations and axial confinement means, with two screens, of these same radiations according to a second variant embodiment;
• FIG. 8 diagrammatically illustrates an air pumping device comprising, according to the invention, means for radial confinement of the electromagnetic radiations and axial confinement means, with two screens, of these same radiations according to a third variant embodiment
• FIG. 9 is a perspective view of a detail of the device of Figure 8 15.
• An air supply device 1 which makes it possible to suck and / or blow air, comprises at least one electronically commutated electric motor 2, able to drive in rotation a ventilation wheel 4, of the type here at fins 6, via an output shaft 8 of the electric motor.
• the device further comprises at least one support means 10 incorporating several functions, among which the support of the electric motor 2, the cooling of the components of said device and the support of an electronic control board 12 of said electric motor.
• the electric motor mainly comprises an inductor stator 14 and an induced rotor 16, carrying the output shaft 8 capable of driving the ventilation wheel 4.
• the stator 14 is made integral with the support means 10 of the motor, and the rotor 1 6 is arranged around the stator 14 to be rotated under the effect of the magnetic fields generated by the winding and the magnets associated with the rotor and the stator.
• the stator 14 has an annular shape with a central wall 18 which defines the contour of an inner bore 20.
• the central wall has an inner face 22 facing the inner bore and an outer face 24 extended by a plurality of teeth 26 arranged radially in a star.
• the internal bore 20 of the stator has separate portions by modifying the internal diameter of the central wall defining said internal bore 5, parts of larger diameter extending from the edges of the axial ends of the central wall to a edge of shoulder 28 defining a central portion of the inner bore of smaller diameter.
• the stator has at least one axial projection 30 arranged projecting from the inner face, said boss being pierced axially by a î o fixing hole 32 such that it will be described below.
• the teeth 26 are formed by a straight wall, a proximal radial end of which is integral with the central wall 18 of the stator 14 and of which a free distal radial end is extended by a plate 34 which extends over the entire height of the stator and which is wider than the right wall, so as to form a stop wall for the coil to be surrounded around the right wall of the teeth.
• Each plate is covered on the opposite side from the right side wall by a superposition of different sheet metal layers, bonded to each other.
• the stator 14 includes an excitation coil consisting of several phases, each comprising at least a coil of wire 36, whose outputs 20 are electrically connected to power supply means not shown here (only the connecting means 38 being visible in Figure 3).
• the stator comprises twelve teeth wound in three-phase.
• the winding of wire is made around the teeth, each tooth carrying a winding element.
• the plates 25 brought to the end 34 of the teeth and the metal layers that are bonded are dimensioned to provide a transition region 40 therebetween capable of allowing the space required to carry out the winding the wire around the teeth.
• the rotor 1 6 has a bell shape, with an annular ring 42 and a closure wall 44 disposed at one end of said ring.
• the closure wall may take a planar shape substantially perpendicular to the axis of the crown or a curved shape in disengagement from the crown, and carries at its center the motor output shaft 8.
• the ring 42 has a larger diameter than the outer diameter of the stator, so that the rotor can come into recovery of the stator.
• the ring has an inner face which faces the stator in this overlapping position, and at least one permanent magnet 46 is disposed on this inner face of the rotor ring.
• the stator 14 When the engine is assembled, the stator 14 is disposed in the body of rotor 1 6 delimited by the ring 42.
• the rotor and stator are so arranged that the permanent magnet 46 carried by the rotor 1 6 is constantly disposed in the magnetic field generated by the coils of the stator 14 when they are energized current, so as to generate a rotational movement of the rotor around the stator.
• the stator 14 and the rotor 1 6 are arranged so that the closing wall 44 of the rotor facing the impeller 4 and the 14 stator 15 is disposed opposite the support means 10.
• the latter has the shape of a plate 48 and a shaft 50 arranged protruding from the plate and having an inner channel 52 opening substantially at the center of the plate, and is fixed relative to the vehicle structure, here via a frame 54 illustrated in Figure 1.
• the plate 48 extends in a plane substantially perpendicular to the axis of revolution of the internal channel of the barrel 50.
• the barrel substantially cylindrical, is capable of being housed in the internal bore 20 of the stator 14 and to receive the motor output shaft 8 integral with the rotor 16, so that it is understood that the support means 10 ensures the correct positioning of the rotor 1 6 with respect to the stator 14.
• the barrel 50 and the plate 48 form a single piece, it being understood that the support means is integral when the separation of the barrel and platinum causes destruction of one or the other of these components.
• the plate 48 has in the figures a discoidal shape but it is understood that it can take other
• the plate 48 of the support means forms a carrier heat sink of an electronic control card 12, in particular of the supply stator coils.
• the electronic control board is disposed on the face of the plate 48 facing to the opposite side of the barrel 50.
• the support means 10 is made of metal.
• the plate 48 forming a heat sink can efficiently cool the electronic component 5 by thermal conduction.
• the support means is made of metal makes it possible to block electromagnetic radiation emitted by the electronic element, these radiations being able to disturb the operation of the electric motor.
• the support means is made of metal makes it possible to connect the stator 14 to ground via the support means 10.
• the plate 48 of the support means 10 is fixed relative to the structure of the vehicle, via here the frame 54, so that the support means is considered electrically connected to the earth.
• the support means is made of aluminum, so that one associates for this part of the characteristics of lightness and good thermal conduction.
• stator 14 is fixed on the support means 10 and the rotor 1 6 is arranged to rotate around the stator 14.
• the stator is arranged around the 50, being in contact with the outer face of the barrel, while the rotor 1 6 is received, through the output shaft 8 which it is secured, in the inner channel 52 of the barrel.
• the power supply of the coil leads creates magnetic fields 56, exemplified for a winding around a tooth in FIGS. 2 to 3, which forces the driven rotor to rotate under the effect of the 46 permanent magnet that he wears. This results in a drive of the output shaft 8 of the motor as shown is carried by the rotor 1 6 and is rotatably mounted within the barrel 50
• Two bearings 58, 59 are inserted into the internal channel 52 of the barrel 50 to serve as rotation guide to the output shaft 8 of the motor driven also in rotation by the rotor 1 6.
• These bearings can be ball bearings, as shown schematically, but it is understood that they could take the form of 30 roller bearings, needle, or other ...
• the impeller 4 of the drive device of air 1 is secured to the free end of the output shaft 8 of the motor which extends away from the stator 14 and the support means 10, and it comprises, arranged at its periphery, a plurality of blades 6.
• the rotation of the rotor rotates the wheel which helps to produce pulsating air through the fins.
• the electric motor 25 formed by the rotor 16 and the stator 14 further comprises containment means to prevent the propagation of electromagnetic radiation outside the engine and the drive device. air.
• the motor comprises radial confinement means, that is to say means for preventing the radial propagation of these electromagnetic radiation, perpendicular to the axis of the output shaft of the motor.
• the inner face 22 of the central wall 18 of said stator is in contact with the barrel 50 arranged in a projection of the plate 48, it being understood that the one-piece piece formed by the barrel 50 and the plate 48 is metallic and connected to an electrical potential substantially no.
• the metal layers disposed on the plates 34 on the perimeter of the stator 14 are brought to zero potential and form, by the equivalent of a Faraday cage, the radial confinement means.
• FIGS 3 and 4 there is illustrated means to ensure that good contact, this being obtained in particular in that the inner face 22 of the central wall 18 defining the inner bore 20 of the stator 14 has at least a rib 60 which extends radially inwardly of the inner bore 20.
• Rib 60 has two lateral faces 62 each extending said inner face of the central wall 18 and a contact face 64 adapted to be in contact with the barrel of the support means.
• the contact face 64 is curved such that the curvature of the contact face is defined by a circle centered on the axis of the internal bore 20. It is expected that the internal bore 20 of the stator comprises
• ribs 60 arranged in a regular angular distribution, at 120 ° in this case.
• a seat of circular section is thus created to receive the cylindrical barrel of the support means.
• it may also be provided to advantageously modify at least one rib 60, in particular to extend it, substantially in the direction of the axis of the bore internally by a lug 66 which extends projecting from the contact face 64.
• the lug 66 may take the form of a sufficiently rigid tip not to break in the shank of the barrel in the inner bore of the stator, and each of these ribs 60 may wear such a lug 66.
• the internal bore 20 of the stator has a frustoconical shape such that the bore has a more î o large diameter at its end facing the plate 48 at its end facing the rotor, and that the outer profile of the barrel 50 of the support means on which the stator 14 engages also has a frustoconical shape. In this way, it s' ensures a contact over the entire periphery of the shaft during fitting of the stator on the support means.
• the shaft 50 has two axially separate sections in that a first section in direct extension of the plate, has a larger external diameter than the second section extending the first section to the end free of the drum. In this way, a shoulder is formed between the two sections and the stator can come to bear
• the confinement means comprise the presence of at least one additional screen made of a conductive material, in particular aluminum and electrically grounded.
• a conductive material in particular aluminum and electrically grounded.
• the motor 2 comprises a first screen 70, arranged transversely to the output shaft 8, between the stator 14 and the rotor 1 6, to form means of axial confinement of the electromagnetic radiations.
• the first screen 70 extends transversely over the entire diameter of the stator.
• the first screen 70 has an annular shape substantially planar, pierced at its center with a bore 5 72 to be traversed by the output shaft 8 of the motor which extends between the rotor 1 6 and the stator 14.
• the first screen 70 is fixed on the stator 14 substantially in the center of the screen. And fixing means provided by screwing, also allow the grounding of the first screen 70.
• the first screen 70 includes at I O least one tab 76 which extends substantially perpendicularly the edge delimiting the bore central 72 of the first screen.
• the free end of this lug has a bearing edge 78 bent perpendicular to the rest of the tab to come in contact with the stator, and more particularly the shoulder edge 28 of the inner bore 20 of the stator 14, when the first screen 70 is in position
• the first screen is arranged angularly to the support edge 78 of the tab is arranged around a fastening hole 32 formed in the thickness of the stator.
• the supporting edge 78 is arranged to allow passage to the body of a fixing screw 80, which extends substantially parallel to the motor output shaft 20 for insertion of the screw into the fixing hole 32 corresponding and to be pressed against the shoulder edge 28 by the screw head.
• the first screen 70 includes three mounting lugs 76, regularly distributed at 120 ° on the circumference of the central bore of the screen, and is provided as fixing holes 32 so that the first screen is plated against the stator by three fixing screws 80.
• the fixing screws 80 for the electrical grounding of the first screen 70, this grounding being necessary so that the first screen is able to limit the propagation of electromagnetic radiation.
• the first screen 70 is grounded through at least one of the fixing screw 80, which passes through this purpose the stator 14 for engagement of the other side of the stator, on the plate 48.
• this fixing screw 80 passes through a smooth mounting hole made through the stator 14 and engages in a threaded hole 82 made in platinum.
• each of the three fastening screws may have such an arrangement, or that only one of the fastening screws 80 passes through the stator 14 to engage the plate 48, the other two fastening screws being shorter than to cooperate with a fastening hole 32 threaded in the body of the stator.
• the electrical connection of the screen and earthing is done by means of the 48 platinum metal, of at least one metal fixing screws 80 engaged in the o î platinum, and the contact between the tab 76 of the screen and the screw head.
• a particular embodiment will now be described, particularly with reference to FIGS. 6 to 8, in that two screens are provided to form a more effective cover for the stator.
• a first screen 70 is arranged on the cover of the stator 14 as previously specified, between the rotor 1 6 and the stator 14, and a second screen is disposed on the axial side of the stator 14 opposite to the side covered by said first screen 70, that is to say between said stator 14 and the plate 48.
• This second screen is also made of an electrically conductive material, for example aluminum, as the first screen.
• this second screen may have several variants.
• the second screen 86 extends transversely to the axis of the motor output shaft and has a shape similar to that of the first screen described previously, being its symmetrical to the stator. In this way, the second screen extends radially over the entire diameter of the stator, and it has a substantially flat annular shape 25, pierced at its center to be traversed by the barrel of the support means.
• the second screen comprises as the first screen mounting tabs 88 to be screwed on the stator.
• At least one of the fixing screws 80 mentioned above is threaded on a sufficiently large height to cooperate with a threaded hole in the plate and be engaged with a nut 30 not shown here which plate the second screen 86 on the stator.
• the grounding, at the same substantially zero electrical potential, of the first screen 70 and second screen 86 and ensures an optimal axial confinement of electromagnetic radiation.
• the second screen 90 is, as just described, transverse to the axis of the engine output shaft 8, 5 and extends radially over the entire diameter of the stator 14, having a substantially flat annular shape.
• the second screen is substantially different from the first screen in that it is fitted in its central bore on the barrel 50 of the support means 10.
• the grounding of the second screen 90 is made by contact with the shaft 50 secured to the plate 48 itself connected to the ground. It comprises î o that such embodiment n 'is made possible if the drum 50 and the plate 48 of the support means 10 form a single and same piece grounded.
• FIGS. 7 and 8 show a first screen secured to the stator and thus grounded without any need.
• the second screen 92 may extend axially, substantially in the extension of the plates 34 borne at the periphery of said stator 14, the second screen 92 then having an annular ring shape. In this case, it is possible to set the
• the invention is not limited to air pumping devices according to the embodiments explicitly described with reference to FIGS. 1-5.
• the means for fixing the screen on the stator or on the plate could have a different shape, in particular by being distinct means of the grounding of the screen.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Motor Or Generator Frames (AREA)
• Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

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• 2015
  • 2015-05-29 FR FR1554873A patent/FR3036892B1/fr not_active Expired - Fee Related
• 2016
  • 2016-05-23 WO PCT/EP2016/061617 patent/WO2016193047A1/fr not_active Ceased
  • 2016-05-23 CN CN201680031323.4A patent/CN107667459B/zh active Active
  • 2016-05-23 EP EP16725490.3A patent/EP3304705B1/fr active Active
  • 2016-05-23 US US15/575,849 patent/US10965175B2/en active Active
  • 2016-05-23 JP JP2017561903A patent/JP6676075B2/ja active Active

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