Classifications

• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K7/00—Constructional details common to different types of electric apparatus
  • H05K7/14—Mounting supporting structure in casing or on frame or rack
  • H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
  • H05K7/1427—Housings
  • H05K7/1432—Housings specially adapted for power drive units or power converters
  • H05K7/14329—Housings specially adapted for power drive units or power converters specially adapted for the configuration of power bus bars
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K7/00—Constructional details common to different types of electric apparatus
  • H05K7/14—Mounting supporting structure in casing or on frame or rack
  • H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
  • H05K7/1427—Housings
  • H05K7/1432—Housings specially adapted for power drive units or power converters
  • H05K7/14322—Housings specially adapted for power drive units or power converters wherein the control and power circuits of a power converter are arranged within the same casing
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K7/00—Constructional details common to different types of electric apparatus
  • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
  • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
  • H05K7/209—Heat transfer by conduction from internal heat source to heat radiating structure

Definitions

• the present invention relates to an electrical assembly and a voltage converter comprising such an electrical assembly.
• Electrical assemblies comprising an electrical circuit plated on a heat sink, the electrical circuit comprising a first electrical conductor, called main, a first electrical component mounted on a first surface of the first main electrical conductor, and an electrical insulator hermetically sealing the first main electrical conductor and the electrical component, the electrical insulator having an upper face opposite the first main electrical conductor,
• the heat diffuses into the electrical insulation so that its upper face risks catching fire. , endangering the surrounding elements.
• the aim of the invention is to alleviate at least in part the aforementioned problem.
• an electrical assembly comprising a heat sink, an electrical circuit and a fire protection element, the electrical circuit comprising:
• an electrical insulator hermetically sealing the first main electrical conductor and the electrical component, the electrical insulator having an upper face opposite the first main electrical conductor, the electrical circuit being bonded to said heat sink via an electrically insulating connecting element, and the fire stopper extending at least 85% of a portion of the top face of the electrical insulation or extending a predefined distance of at least 85% of a portion of the upper face of the electrical insulator, this part grouping together the point or points of the upper face of the electrical insulator closest to the first electrical component.
• the spread of fire is stopped or at least limited.
• the electrical assembly according to the first aspect of the invention can also have one or more of the characteristics of the particular embodiments below, considered individually or in any technically possible combination.
• the electrical circuit is a power module.
• the first main electrical conductor is a bus bar.
• the first main electrical conductor is a bus bar intended to be connected to a high electrical potential of an electrical power source.
• the second main electrical conductor is a bus bar intended to be connected to a phase of a rotating electrical machine.
• the second main electrical conductor comprises first and second electrical conductors, called partial, said first and second partial electrical conductors being bus bars.
• the third main electrical conductor is a bus bar.
• the third main electrical conductor is a bus bar intended to be connected to a low electrical potential of an electrical power source.
• the first main electrical conductor and / or the third main electrical conductor have the form of horizontal flat plates, for example having a thickness between 1 mm and 2 mm.
• the first main electrical conductor and the third main electrical conductor are in the form of two coplanar plates which extend next to each other.
• the first main electrical conductor and / or the second partial electrical conductor and / or the third main electrical conductor have the form of horizontal flat plates, for example having a thickness between 1 mm and 2. mm.
• the first main electrical conductor, the second partial electrical conductor and the third main electrical conductor have the form of coplanar plates which extend one beside the other.
• a second surface of the first electrical conductor opposite the first surface on which the first electrical component is mounted has a portion not covered with electrical insulation, the portion not covered with electrical insulation being attached to the heat sink via the electrically insulating connecting element.
• the electrically insulating connecting element comprises particles of solid material.
• the particles of solid matter each have a diameter greater than a predefined value.
• the electrically insulating connecting element comprises an electrically insulating sheet or plate interposed between the portion not covered with electrical insulation and the heat sink.
• the electrically insulating sheet or plate interposed between the portion not covered with electrical insulation and the heat sink is made of graphite or ceramic.
• the surface of the heat sink to which the portion not covered with electrical insulation is attached is formed with a film of electrically insulating material.
• the surface of the heat sink to which the electrical circuit is attached is formed with a film of electrically insulating material.
• the film of electrically insulating material is for example obtained by anodizing the surface of the heat sink to which the electrical circuit is fixed.
• the surface of the portion not covered with electrical insulation is formed with a film of electrically insulating material.
• the heat sink is made of aluminum or an aluminum alloy and the electrically insulating film is formed by an oxidized film.
• the electrical insulator has a lower face, the lower face and / or the surface of the heat sink on which the electrical circuit is fixed comprises projections which controls the thickness of the heat sink. electrical connection element.
• the predefined distance is less than 1 mm, preferably less than 0.5 mm and even more preferably less than 0.2 mm.
• the distance between the fire stop element and the upper face of the electrical insulator is preferably as small as possible to stop the propagation of the fire as close as possible to the electrical component.
• a distance between the fire-resistant element and the upper face of the electrical insulator of less than 1 mm, preferably less than 0.5 mm and even more preferably 0.2 mm allows the cutting element to keep -fire a good ability to stop or limit the spread of fire.
• the fire-resistant element is metallic, for example steel.
• the fire barrier element is in the form of a plate.
• the electrical insulation is an epoxy resin.
• the electrical insulation is hard enough to form a protective casing.
• the electrical circuit further comprises a second electrical conductor, said main and at least one electrical connection intended to connect the first electrical component to the second main electrical conductor, each electrical connection having a conductive section. electrical at least ten times smaller than an electrically conductive section of the first main electrical conductor.
• the electrical assembly further comprises a magnetic toroid and the electrical circuit further comprises a second electrical component mounted on a first surface of the second main electrical conductor, the second main electrical conductor comprising first and second electrical conductors, called partial, electrically connected to each other, the magnetic torus being wound around the second partial electrical conductor.
• the electrical insulator hermetically seals the first main electrical conductor, the first electrical component and the second main electrical conductor.
• the electrical insulator hermetically seals the first main electrical conductor, the second main electrical conductor, the third main electrical conductor, the first electrical component and the second electrical component.
• the electrical assembly further comprises at least one second electrical connection intended to connect the second electrical component to a third electrical conductor, called main, each second electrical connection having an electrically conductive section at least ten times smaller than an electrically conductive section of the second main electric conductor.
• the second partial electrical conductor is electrically connected to the first partial electrical conductor by soldering, brazing or screwing.
• the electrical assembly further comprises an overmolding of plastic material surrounding the magnetic toroid and the second partial electrical conductor, and in which the fire-resistant element is fixed to the overmolding of plastic material.
• the firestop element has at least one tab, each tab being overmolded in the plastic overmolding to secure the firestop element to the plastic overmolding.
• the electrical assembly further comprises an overmolding of plastic material surrounding the magnetic toroid and the second partial electrical conductor, and in which the fire-resistant element is inserted between the lower face of the plastic overmolding and the upper face of the electrical insulator.
• the plastic overmolding surrounding the magnetic core comprises at least one stud projecting from the underside of the overmolding
• the fire-resistant element comprises at least one holes
• the face upper part of the electrical insulator comprises at least one cavity, said pad being intended to be inserted into said hole and said cavity when the second partial electrical conductor is electrically connected to the first partial electrical conductor in order to maintain the fire element between the underside of the plastic overmolding and the upper face of the electrical insulator.
• the first electrical component and / or the second electrical component is a controllable switch, for example an insulated gate field effect transistor.
• the heat sink comprises at least one cavity, the electrical circuit being positioned on the bottom of the cavity.
• the heat sink cavity is at least partially filled with an electrical insulator, a gel or an epoxy resin so as to at least partially cover the electrical circuit.
• the heat sink cavity is at least partially filled with an electrical insulator, a gel or an epoxy resin so as to completely cover the electrical circuit.
• the insulation or the gel is non-flammable or incombustible or comprises a flame retardant. It is also proposed, according to a second aspect of the invention, a voltage converter comprising an electrical assembly according to the first aspect of the invention.
• the voltage converter further comprises a part and the fire-resistant element has at least one flexible strip intended to be deformed by said part so as to press said electrical circuit against the heat sink. heat.
• the voltage converter further comprises a part and the fire-resistant element has at least one flexible strip intended to be deformed by the part so as to press the electrical circuit against the bottom. heat sink cavity.
• FIG 1 is an electrical diagram of an electrical system embodying the invention.
• FIG 2 is a three-dimensional view of a power module of a voltage converter of the electrical system of Fig. 1, without overmolding or fire stop element.
• FIG 3 is a three-dimensional view of a first sub-module of the power module.
• FIG 4 is a three-dimensional view of a second sub-module of the power module.
• FIG 5 is a view similar to that of Figure 4, without overmolding.
• FIG 6 is a sectional view of part of the power module, illustrating the arrangement of the fire stop element.
• FIG 7 is a sectional view of the voltage converter illustrating the positioning of the power module.
• FIG 8 is a block diagram illustrating the steps in a power module manufacturing process.
• the electrical system 100 is for example intended to be installed in a motor vehicle.
• the electrical system 100 firstly comprises an electrical power source 102 designed to deliver a direct voltage U, for example between 20 V and 100 V, for example 48 V.
• the electrical power source 102 comprises for example a drums.
• the electrical system 100 further comprises an electrical machine 130 comprising several phases (not shown) intended to present respective phase voltages.
• Electrical system 100 further includes a voltage converter 104 connected between electrical power source 102 and electrical machine 130 to convert between direct voltage U and phase voltages.
• the voltage converter 104 first of all comprises a positive bus bar 106 and a negative bus bar 108 intended to be connected to the power supply source 102 to receive the direct voltage U, the positive bus bar 106 receiving a high electrical potential. and the negative bus bar 108 receiving a low electrical potential.
• the voltage converter 104 further comprises at least one power module 110 comprising one or more phase bus bars 122 intended to be respectively connected to one or more phases of the electric machine 130, to supply their respective phase voltages.
• the voltage converter 104 comprises three power modules 110 each comprising two phase bus bars 122 connected to two phases of the electrical machine 130.
• the electric machine 130 comprises two three-phase systems each comprising three phases.
• the two three-phase systems are intended to be electrically out of phase by 120 ° to each other.
• the first phase bus bars 122 of the power modules 110 are respectively connected to the three phases of the first three phase system, while the second phase bus bars 122 of the power modules 110 are respectively connected to the three phases of the second three phase system. .
• Each power module 110 has, for each phase bus 122, a high side switch 112 connected between positive bus 106 and phase bus 122 and a low side switch 114 connected between phase bus 122 and the negative bus bar 108.
• the switches 112, 114 are arranged to form a switching arm, in which the phase bus bar 122 forms a midpoint.
• Each switch 112, 114 has first and second main terminals 116, 118 and a control terminal 120 intended to selectively open and close switch 112, 114 between its two main terminals 116, 118 as a function of a control signal which is applied to it.
• the switches 112, 114 are preferably transistors, for example field effect transistors with a metal-oxide-semiconductor structure (from G English “Metal Oxide Semiconductor Field Effect Transistor” or MOSFET) having a gate forming the terminal of control 120, and a drain and a source respectively forming the main terminals 116, 118.
• the switches 112, 114 each have the shape of a plate, for example substantially rectangular, having an upper face and a lower face.
• the first main terminal 116 extends on the lower face, while the second main terminal 118 extends on the upper face.
• the positive bus bar 106, the negative bus bar 108 and the phase bus bars 122 are rigid electrical conductors designed to withstand electrical currents of at least 1 A. They preferably have a thickness of at least 1 mm and / or an electrically conductive cross section of at least 1 mm 2 .
• the positive bus bar 106 comprises first of all a positive common bus bar 106 A connecting the power modules 110 and, in each power module 110, a positive local bus bar 106B connected to the 106A positive common busbar.
• negative 108B busbar has a 108A negative common busbar connecting the power modules 110 and, in each power module 110, a negative local busbar 108B for each side switch bottom 114, the negative local bus bars 108B being connected to the negative common bus bar 108 A.
• the connections are shown in Figure 1 by diamonds.
• the positive common bus bar 106A and the negative common bus bar 108 A are each formed from a single conductive piece.
• the electric machine 130 has both an alternator and an electric motor function. More specifically, the motor vehicle further comprises a heat engine (not shown) having an output axis to which the electric machine 130 is connected by a belt (not shown). The heat engine is intended to drive the wheels of the motor vehicle via P via its output axis.
• the electrical machine supplies electrical energy to the electrical power source 102 from the rotation of the output shaft.
• the voltage converter 104 then operates as a rectifier. When operating as an electric motor, the electric machine drives the output shaft (in addition to or instead of the heat engine).
• the voltage converter 104 then operates as an inverter.
• the electric machine 130 is for example located in a gearbox or in a clutch of the motor vehicle or in place of the alternator.
• the power module 110 comprises first and second sub-modules.
• the first submodule has the positive local bus bar 106B and the negative local bus bars 108B. It further comprises, for each phase bus bar 122, a partial bus bar 202 forming part of this phase bus bar 122. It further comprises the switches 112, 114.
• the bus bars 106B, 202, 108B have the form of horizontal flat plates having a thickness between 1 mm and 2 mm, for example 1.5 mm, and having a horizontal flat upper face.
• the bus bars 106B, 202, 108B are coplanar and extend next to each other, which helps to limit the vertical footprint of the power module 110.
• each high side switch 112 is pressed against the upper face of the positive local bus bar 106B and soldered to the latter in order to mechanically fix the high side switch 112. This attachment further allows its first to be electrically connected. main terminal to positive local bus 106B.
• the first submodule comprises, for each high side switch 112, one or, preferably, several conductive strips 210, for example of aluminum, extending from the upper face of the high side switch 112 considered. to a respective one of the partial bus bars 202 in order to electrically connect them.
• the conductive strips 210 preferably have an electrically conductive section at least ten times smaller than the electrically conductive section of the bus bars 106B, 202, 108B.
• each low side switch 114 is pressed against the upper face of the partial bus bar 202 and soldered to the latter in order to mechanically secure the low side switch 114. This attachment further allows connection. electrically its first main terminal to phase bus 122.
• the first submodule comprises, for each low side switch 114, one or, preferably, several conductive strips 212, for example of aluminum, extending from the upper face of the low side switch 114 to a respective one of the negative local bus bars 108B in order to electrically connect them.
• the conductive strips 212 preferably have an electrically conductive section at least ten times smaller than the electrically conductive section of the bus bars 106B, 202, 108B.
• the second submodule has another partial bus bar 204 attached to the partial bus bar 202, for example by soldering, soldering or screwing, so that the two are mechanically fixed and electrically connected to each other.
• each phase bus bar 122 has the two partial bus bars 202, 204.
• the partial bus bars 204 also have the shape of horizontal flat plates having a thickness between 1 mm and 2 mm, for example 1.5 mm.
• One end of the partial bus bars 204 may take a curved shape to facilitate their attachment to the partial bus bars 202.
• the partial bus bar 204 further comprises a connection terminal 206 intended to be connected to a phase of the electrical machine 130.
• the shape of the connection terminals 206 is related to the shape of the phase terminals of the electrical machine. 130.
• the second sub-module comprises, around each partial bus bar 204, a magnetic toroid 208 provided with an air gap where a Hall effect sensor (not shown) is intended to be placed in order to measure the phase current flowing through the terminal. corresponding 206 connection.
• the first sub-module designated by the reference 200, further comprises an epoxy resin overmolding 302 extending around the positive local bus bar 106B, negative local bus bars 108B, bus bars partial 202, switches 112,
• the epoxy resin overmolding 302 thus forms an electrical insulator covering in particular the bus bars 106B, 202, 108B and the switches 112, 114.
• the epoxy resin overmolding 302 has an upper face 304 opposite the bus bars 106B, 202. , 108B. This upper face 304 is flat and horizontal.
• the material used for the overmolding 302 has, for example, a flexural limit greater than 80 N / mm 2 , preferably greater than 100 N / mm 2 .
• the material used for the overmolding 302 can be an epoxy resin bearing the name G720E type H whose flexural limit is 140 N / mm 2 or an epoxy resin bearing the name XE8495 whose flexural limit is 105 N / mm 2 .
• the lower face of the positive local bus bar 106B opposite the upper face of the positive local bus bar 106B on which the switch 112 is mounted has a portion S1 not covered by the epoxy resin overmolding 302.
• the lower face of the partial bus bar 202 opposite the upper face of the partial bus bar 202 on which the switch 114 is mounted has a portion S2 not covered by the epoxy resin overmolding 302.
• the second sub-module designated by the reference 201, further comprises an overmolding of plastic material 402 extending around the magnetic cores 208 and the partial bus bars 204, in order to hold the magnetic cores 208 mechanically fixed to the partial bus bars 204.
• the second sub-module 201 further comprises a fire stop element 404 formed in the written example of a horizontal metal plate fixed to a lower face of the overmolding 402 and protruding from the latter.
• the metal plate is for example a steel sheet.
• the fire barrier element 404 has at least one flexible strip 406 (three in the example described), preferably located in one of the areas projecting from the underside of the overmolding 402.
• each flexible strip 406 is rectangular in shape, one end of which is connected to the rest of the fire stop element 404 by an upward bend.
• Each flexible strip 406 is for example obtained by stamping the metal plate forming the fire stop element 404.
• the fire stop element 404 has, for example, a thickness of between 0.5 and 1 mm.
• the complete power module 110 comprises the first submodule 200 as illustrated in FIG. 3 and the second submodule 201 as illustrated in FIG. 4, fixed to each other.
• the fire stop element 404 also has three tabs 502 intended to be embedded in the overmolding 402 to fix the fire stop element 404 there.
• the fire stop element 404 extends to less than 1 mm, preferably less than 0.2 mm, at least 85% (100% in the example described) of a part 604 of the upper face 304 of the electrical insulator 302 closest to the switch 112, 114 considered. More precisely, this part 604 (represented by thick dotted lines in FIG. 6) groups together at least the points of the upper face 304 of the electrical insulator 302 closest to the switch 112, 114 considered. These points closest to the switch 112, 114 are designated by the reference 606 in FIG. 6. In the example described, the points closest to the switch 112, 114 are those located vertically on the switch. switch 112, 114. Thus, in the example described, the fire stop element 404 extends at least above the switch 112, 114 to cover it.
• part 604 groups together the points of the upper face 304 of the electrical insulator 302 located at a distance less than or equal to a predefined distance D from the switch 112, 114 considered.
• This predefined distance D is greater than the thickness E of the overmolding 302 between the switch 112, 114 considered and the upper surface 304 of the overmolding 302, the thickness E corresponding to the minimum distance between the switch 112, 114 considered and the upper surface 304 of the overmolding 302.
• the predefined distance D is for example less than 4 mm. In the example described, it is approximately 2 mm.
• the conductive strips 210, 212 When the power module 110 is shorted, the conductive strips 210, 212 get hotter and hotter until they break. However, as they are embedded in the epoxy resin which is hard, the pieces of the conductive strips 210, 212 remain in contact and let the current pass. The current which passes then heats the switches 110, 112 and the heat diffuses into the overmolding 302 up to its upper face 304 which catches fire.
• the points closest to each switch 110, 112 are those whose temperature rises first due to the proximity of the switch 110, 112 and are therefore the points to be protected as a priority.
• the presence of the fire stop element 404 helps to prevent the spread of fire, or at least to delay it.
• the voltage converter 104 comprises a housing 702 delimiting a housing for receiving an electronic card (not shown), for example a printed circuit board, for controlling the switches 112, 114.
• the converter voltage 104 further comprises a heat sink 704 intended to dissipate heat in particular switches 112, 114.
• the heat sink 704 in particular comprises heat dissipation fins 706. He further comprises a shaft for receiving a screw (not shown) for fixing the housing 702 to the heat sink 704.
• the heat sink 704 also includes three cavities 708.
• Each of the power modules 110 is intended to be glued to the bottom of one of the cavities 708 via an electrically insulating link member 900 so as to be between the housing 702 and the heat sink 704.
• the electrically insulating connecting element 900 is, for example, a thermal adhesive.
• the electrically insulating connecting element is a thermal paste.
• the electrically insulating connecting element is a thermal grease.
• the electrically insulating link member 900 further comprises particles of solid material (not shown in Figure 7) such as plastic.
• the thickness of the electrically insulating connecting member 900 is determined by the diameter of the particles of solid matter.
• the electrically insulating connecting element 900 comprises an electrically insulating sheet or plate, for example made of ceramic or graphite, interposed between the surfaces S1 and S2 of the power module 110 and the heat sink heat 704.
• the bottom of the cavities 708 of the heat sink 704 is formed with a film of electrically insulating material, for example obtained by anodizing the surface of the bottom of the cavities 708.
• the electrically insulating film is formed by an oxidized film.
• the underside of the epoxy resin overmolding 302 and / or the bottom surface of the cavities 708 of the heat sink 704 on which the power modules 110 are attached comprises protrusions which control the thickness of the electrical connection element 900.
• G use of a sheet, of an electrically insulating plate, of a film of electrically insulating material or of projections also limits the risks of the appearance of electric arcs between the surfaces S 1 and S2 exposed outside the overmolding.
• epoxy resin of the power semiconductor module 110 and the heat sink 704 as well as the fire starts which may be the consequence.
• the cavities 708 of this sink 704 are at least partially filled with a gel 950, for example a non-flammable or non-combustible gel or even comprising a flame retardant, so as to completely cover the power modules 110.
• the cavities 708 are at least partially filled with an electrical insulator or an epoxy resin, so as to completely cover the power modules 110.
• the gel, electrical insulation or epoxy resin will prevent its spread, or at least delay it.
• the housing 702 When the housing 702 is attached to the heat sink 704, the housing 702 is intended to press on the flexible lamella (s) 406 to deform them so as to press the power module 110 against the heat sink 704.
• the or the flexible strips 406 are designed so that, once deformed by the housing 702, they transmit a vertical force of at least 70 N to the power module 110.
• this plating makes it possible to prevent the bus bars from move away from heat sink 704 with time and wear of electrical link member 900. This plating also avoids the use of screws to secure power modules 110 to heat sink 704.
• the electronic card is housed in the housing 702 and fixed to the latter before the housing 702 is fixed to the heat sink 704 and presses on the flexible lamella (s) 406.
• the first and second submodules 200, 201, without the overmoldings 302, 402, are obtained.
• the epoxy resin is injected at low pressure and then crosslinked to form the epoxy resin overmolding 302.
• the low pressure injection makes it possible not to damage the conductive strips 210, 212, which are fragile.
• plastic material is injected at high pressure to form the plastic molding 402.
• the two submodules 200, 201 are attached to each other.
• the fire stop element 404 is glued against the upper face 304 of the epoxy resin overmolding 302 and the partial bus bars 204 are attached to the partial bus bars 202.
• the overmolding 302 could be in a material other than the epoxy resin.
• the fire-resistant element 404 may not be fixed on a lower face of the overmolding 402 and not be glued against the upper face 304 of the epoxy resin overmolding 302. but only be inserted between the underside of the overmolding 402 and the upper face 304 of the epoxy resin overmolding 302 when the partial busbars 204 are attached to the partial busbars 202 in step 808.
• the face of the overmolding 402 comprises overmolded studs, for example two in number and of cylindrical shape, projecting from the underside of the overmolding 402 and intended to be inserted into corresponding holes of the fire stop element and into cavities of the top face 304 of the epoxy resin overmolding 302 when the partial bus bars 204 are attached to the partial bus bars 202 in step 808.

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• Engineering & Computer Science (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Cooling Or The Like Of Electrical Apparatus (AREA)
• Inverter Devices (AREA)
• Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
• Power Conversion In General (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=70613899

Family Applications (1)

Country Status (5)

Families Citing this family (2)

Family Cites Families (2)

• 2019
  • 2019-12-11 FR FR1914218A patent/FR3104891B1/fr active Active
• 2020
  • 2020-12-10 CN CN202090001083.5U patent/CN218784016U/zh active Active
  • 2020-12-10 KR KR1020227021569A patent/KR20220113415A/ko unknown
  • 2020-12-10 EP EP20820174.9A patent/EP4074149A1/de active Pending
  • 2020-12-10 WO PCT/EP2020/085427 patent/WO2021116246A1/fr unknown

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