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
  • H05K7/20—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
  • H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
  • H05K7/20918—Forced ventilation, e.g. on heat dissipaters coupled to components the components being isolated from air flow, e.g. hollow heat sinks, wind tunnels or funnels
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
  • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
  • F01D25/08—Cooling; Heating; Heat-insulation
  • F01D25/12—Cooling
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
  • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
  • F02B37/04—Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump
  • F02B37/10—Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump at least one pump being alternatively or simultaneously driven by exhaust and other drive, e.g. by pressurised fluid from a reservoir or an engine-driven pump
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
  • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
  • F02B39/005—Cooling of pump drives
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
  • H02K11/30—Structural association with control circuits or drive circuits
  • H02K11/33—Drive circuits, e.g. power electronics
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • 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
  • H02K9/227—Heat sinks
• • 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
  • H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
  • H05K7/20136—Forced ventilation, e.g. by fans
  • H05K7/20172—Fan mounting or fan specifications
• • 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
  • H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
  • H05K7/20272—Accessories for moving fluid, for expanding fluid, for connecting fluid conduits, for distributing fluid, for removing gas or for preventing leakage, e.g. pumps, tanks or manifolds
• • 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
  • H05K7/20927—Liquid coolant without phase change
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
  • F05D2220/00—Application
  • F05D2220/40—Application in turbochargers
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
  • F05D2260/00—Function
  • F05D2260/20—Heat transfer, e.g. cooling
• • 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
• • 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
  • H02K9/223—Heat bridges

Definitions

• the present invention relates to the field of electronic power systems for controlling particular electrical machines dedicated to the electrification of supercharging systems used in particular for internal combustion engines. More specifically, the invention relates to a cooling device for these electronic power systems.
• Some power electronics systems may be electronic DC / AC power converters, in particular inverters, whose function is to interface DC voltage sources with electrical machines operating with alternating current. These inverters are used to perform various essential functions for converting and shaping electrical quantities (currents, voltages and frequencies) from DC voltage sources. Thus, the functions performed by these inverters are in particular to interface a voltage source with a charge or source of a different nature, to control the voltages and currents involved, to ensure a good quality of energy, either on the source side or on the load side and to ensure the electrical stability of the entire conversion system.
• the electronic power systems comprise power electronic components generating heat resulting in particular losses during high frequency switching.
• the heat generated can cause the power components to be at such temperatures that the performance of the power components can be degraded, or even their structures can be damaged. This is especially true in thermally binding environments, as may be the case during close operation or on an internal combustion engine under the hood of a vehicle.
• US 6930417 B2 describes an inverter combined with an electric motor in which the power components of the inverter are mounted directly on the electric motor. In this case, the power components of the inverter are cooled by a water or liquid cooling circuit.
• the present invention thus aims to overcome the disadvantages listed above and aims to provide a solution for cooling electronic power systems that is simple to design and effective, while integrating the closest to the electric machine to drive.
• the purpose of this invention is to limit design costs, costs of electronic components and the use of materials used for wiring between components and the machine.
• a cooling device of an electronic power system comprising at least one electronic power component mounted on at least one card electronic, said cooling device comprises a circulation hose of a flow at an ambient temperature, and the cooling device is characterized in that it comprises a first heat exchange surface thermally connected to the electronic power components and at least one a second heat exchange surface with the circulating flow inserted into the circulation hose so as to evacuate heat by convection with the circulating flow and said second heat exchange surface is thermally connected to the first heat exchange surface.
• a cooling device as provided allows cooling of the electronic power system. This has the effect of increasing the life of the electronic system but also allows the use of electronic components inexpensive and compact and easily integrated on electronic cards.
• the effect of having a circulation hose that conveys a flow at ambient temperature, that is to say around 20 ° C. makes it possible to channel the flow in a restricted space and in a given direction, and makes it possible to bring this flow to a desired location according to the hose configuration.
• By choosing an appropriate size of the hose it is possible to control the speed and / or the pressure and / or the flow rate of the circulating flow, which proves particularly advantageous for evacuating more or less heat as will be described later. .
• This surface will play a role of heat sensor. This heat is captured from the electronic components due to the proximity and / or thermal bonding of the components with the components that generate heat.
• This first thermal surface is generally positioned near the electronic components so that the heat exchange is done by thermal conduction as quickly and as efficiently as possible.
• the advantage of having a second heat exchange surface thermally connected to the first heat exchange surface is to be able to transfer heat from the first surface to the second surface, especially by conduction. These two surfaces can be connected directly or indirectly as will be described later.
• the effect of positioning the second heat exchange surface in the flow flowing in the circulation hose is to allow the heat accumulated in and on the second surface, to be evacuated by the flow, in particular by a convection phenomenon. As the flow is generally less hot than the second heat exchange surface, the heat transfer is from the second heat exchange surface to the flow.
• the cooling device comprises a heat sink which connects the first heat exchange surface with the second heat exchange surface, and the heat sink includes at least part of the flow circulation hose.
• the advantage of such a dissipator whose structure includes part of the hose, is to be able to improve the heat exchange between the first and the second heat exchange surface, but also between the second heat exchange surface and the flow .
• having a structure that partially encompasses the hose increases the surface of the heatsink. This surface is used in particular to carry the second heat exchange surface and thus increases the heat exchange surface of the second heat exchange surface.
• the second heat exchange surface is carried by fins connected to the heat sink and the fins are arranged circularly in the hose and converge from the edge of the hose to the center thereof.
• the fact of designing the second heat exchange surface in the form of fins makes it possible to have a radiator-type device which has a large heat-exchange surface due to the positioning along the wall of the hose.
• the arrangement of the fins as evoked, allows to use the entire flow flowing in the hose for heat exchange.
• the second heat exchange surface is carried by fins connected directly to the first heat exchange surface and directed into the heat pipe. perpendicular to the first heat exchange surface.
• the second heat exchange surface is carried by fins connected directly to the first heat exchange surface and the fins converge in the hose and towards the center thereof.
• Such an arrangement of the fins makes it possible to have a simple and fast construction to implement and which makes it possible to bring the heat to the center of the hose, in the circulating flow, where the heat evacuation is optimal.
• the electronic power system is an inverter, a part of which electronic power components are connected to the first heat exchange surface.
• said flow circulation hose is an air intake hose of an internal combustion engine.
• the invention relates to an electronic power system, said system comprises a mechanical housing which integrates at least one electronic card comprising at least one electronic power component characterized in that said electronic power system comprises a cooling device as claimed previously.
• the advantage of using such a cooling device in the context of an electronic power system is to be able to cool this system in a simple and efficient way and to be able to integrate it in an environment very close to a heat engine while reducing the length of the connections with an electric machine.
• the mechanical housing incorporates fins intended to capture the heat inside the mechanical housing and to transfer it to the flow. These fins may come in addition to the fins of the cooling device to further improve the efficiency of the heat removal.
• the mechanical housing incorporates a fan.
• a fan is to stir the air inside the housing to accelerate heat exchange with the fins.
• This fan comes in addition to the fins and is sized to be compact and to be able to stir air.
• the mechanical housing comprises a system for circulating a part of the flow inside said mechanical housing.
• the advantage of such a circulation system is to accelerate the heat exchange in the housing and in particular between the power components and the first heat treatment surface.
• the electronic power system supplies an electric machine.
• said electric machine drives a compressor.
• a supercharging system of a heat engine that is compact and easy to implement.
• said electric machine drives a turbine of a turbocharger.
• said electrical machine is traversed by the flow of air upstream of said compressor or said turbine of said turbocharger.
• said electric machine is disposed on a shaft which connects the compressor of said turbocharger and the turbine of said turbocharger.
• Figure 1 illustrates a device according to the invention in a first embodiment
• FIG. 2 illustrates a device according to the invention in a second embodiment
• FIG. 3 illustrates a device according to the invention in a third embodiment
• FIG. 4 illustrates a device according to a first configuration in the case of a turbocharger driven by an electric machine
• FIG. 5 illustrates a device according to a second configuration in the case of a turbocharger driven by an electric machine
• FIG. 6 illustrates a device according to a third configuration in the case of a turbocharger driven by an electric machine
• Figure 7 illustrates an integrated device in the case of a compressor.
• the proposed solution consists of a power electronics (EP) for electrifying electric machines (ME) that can be found in powertrains comprising an engine (M) internal combustion.
• These electric machines (ME) can be used for example for the supercharging of internal combustion engines and may be, without limitation, compressors (C) or turbochargers (Te).
• This power electronics (EP) may comprise several electronic cards (3), as shown in Figure 1, on which are mounted electronic components.
• the electronic power system (EP) is an inverter, used to interface a power source with the various electrical machines (ME)
• the electronic power system (EP) will comprise electronic components (2) power .
• These electronic components (2) of power are integrated on one of the electronic cards (3).
• the electronic cards (3) are integrated in a mechanical housing (10).
• the electronic components (2) of power are cooled by a stream (5) which circulates in a hose (4) of circulation of a stream (5).
• this hose (4) is a hose (4) for admission of the engine air (M).
• the temperature of the air admitted into this hose (4) is generally close to the ambient air temperature (around 20 ° C under nominal conditions).
• the air flow admitted into the hose (4) is generally proportional to the engine power demand (M).
• the invention uses a cooling device (1) coupled to the circulation hose (4) of this stream (5). As can be seen in FIG.
• the device (1) for cooling the electronic power system comprises a first heat exchange surface (6).
• This first heat exchange surface (6) is the surface where a heat transfer between different elements will take place.
• This first heat exchange surface (6) is thermally connected to the electronic power components (2). Being thermally connected to the electronic power components (2) has the effect of sensing the heat of the electronic power components (2) and transferring it to the first heat exchange surface (6) through the intermediate of a temperature gradient.
• This first heat exchange surface (6) can be positioned at the surface bottom of a heat conducting electronic plate.
• the cooling device (1) also comprises at least one second heat exchange surface (7), thermally connected to the first heat exchange surface (6), and at which the heat will be discharged.
• the second heat exchange surface (7) is thermally connected to the flow (5) circulating in the hose (4) and for this it is inserted into the flow hose (4) of the flow (5) so as to evacuate the heat by convection with the flow (5) flowing. It is at the level of the second heat exchange surface (7) that the heat will be discharged into the flow (5).
• an additional piece such as a heat sink (8) connects the first and the second heat exchange surface. As can be seen in FIG. 1, this heat sink (8) includes at least part of the hose (4).
• the second heat exchange surface (7) is carried by the fins (9). It should be understood that the second heat exchange surface (7) is composed of the outer surface of the fins (9).
• These fins (9) are mechanically and thermally connected to the heat sink (8) but also thermally to the first heat exchange surface (6) and to the electronic power components (2). These fins (9) can have different shapes and arrangements. In the first embodiment, the fins (9) are arranged circularly around the hose (4) and they converge from the edge of the hose (4) to the center thereof. In order to conduct the heat well, the fins (9) and the heat sink (8) are made of a thermally conductive material of heat. The size of the fins (9) may vary in thickness and length but they are dimensioned so as not to disturb the flow flow (5) in the hose (4). The vanes (9) and the heat sink (8) can be made in the same room.
• FIG. 2 Another embodiment is visible in FIG. 2, in which the second heat exchange surface or surfaces (7) are carried by fins (9) which are connected directly, that is to say mechanically and thermally, to the first heat exchange surface (6) by limiting the conduction through the material.
• the second heat exchange surface (7) is composed of the outer surface of the fins (9).
• the fins (9) are directed in the circulation hose (4), perpendicularly to the first heat exchange surface (6).
• the size of the fins (9) can vary in thickness and in length and they are also dimensioned so as not to disturb the flow of the flow (5) in the hose (4).
• the fins (9) are also made of a thermally conductive material.
• FIG. 3 which represents a third embodiment of the cooling device (1)
• the second heat exchange surface or surfaces (7) are carried by fins (9) which are connected directly to the first surface of the cooling device (1).
• 'exchange heat (6) and, in this case, the fins (9) converge in the hose and towards the center thereof.
• these cooling devices (1) make it possible to use power components (2) which are less expensive because they operate under optimal thermal conditions, because they are cooled by a high airflow guaranteeing perfect thermal management of the inverter housing. In this way, the cost of the electronic power system (EP) can be reduced while ensuring an adequate level of performance.
• an interest lies in the fact of being able to do without auxiliary cooling device as was mentioned previously, and which are in particular either dedicated fans (which further limits the energy consumed by the system) or devices coolant circulation system, water circuit type.
• auxiliary cooling device which are in particular either dedicated fans (which further limits the energy consumed by the system) or devices coolant circulation system, water circuit type.
• Such a cooling system also makes it possible to integrate the electronic power system (EP) in an environment very close to the internal combustion engine (M) with the beneficial effect of reducing the length of the connections with the electric machine (ME) ( and therefore a reduction of OEM constraints).
• This type of solution is particularly suitable for the power electronics (EP) of an electrifying component of supercharging organs, as this makes it possible to propose compact and integrated solutions for electric machines (ME) and inverters. Indeed and in this case, the power electronics (EP) can be positioned closer to an electric machine (ME).
• the mechanical housing (10) can also incorporate additional fins (not shown). They have the effect of capturing the heat inside the mechanical housing (10) and transfer it to the flow (5) flowing in the hose (4).
• the mechanical housing (10) can also incorporate a fan (not shown). This fan, unlike the previously mentioned dedicated fans, aims to "brew” the air in the mechanical housing (10) and thus promote heat exchange between the additional fins.
• the mechanical housing (10) may also comprise, in the various embodiments previously mentioned, a system for circulating part of the flow (5) inside said mechanical housing (10). This increases the cooling of the internal air.
• FIG. 4 shows a turbocharger (Te) for an internal combustion engine (M) comprising one or more pistons (20).
• the turbocharger (Te) comprises a compressor (C) connected by a shaft (21) to a turbine (T), an electric machine (ME), an air intake hose (4), and a charge cooler ( R).
• the system power electronics (EP) can be positioned upstream for example of the compressor (C) of air, where the air temperature is relatively moderate ( ⁇ 50 ° C), to reduce the length of the cables between the two organs (to improve performance and limit OEM losses ).
• the electric machine (ME) is placed on the shaft (21) which links the compressor (C) and the turbine (T) of the turbocharger (Te).
• the power electronics (EP) can also be positioned downstream of the supercharging cooler (R) where the air temperature is controlled at a moderate temperature in all operating conditions.
• the electric machine (ME) is placed on the shaft (21) which links the compressor (C) and the turbine (T) of the turbocharger (Te).
• this power electronics (EP) can be integrated into the electric machine (ME) to make a single component as visible at This configuration makes it possible to reduce as much as possible the length of the cables between the two members.
• FIG. 7 represents the case of an internal combustion engine (M) with a compressor (C) in which the power electronics (EP) is integrated into the electric machine (ME) so as to be one and the same. component. This configuration minimizes the length of the cables between the two bodies.
• this power electronics solution is mechanically linked to the heat engine with a system for filtering and damping vibrations from the engine (M) thermal.
• the invention is not limited to the embodiments of the cooling device described above by way of example, it embraces all variants.

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• Engineering & Computer Science (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Power Engineering (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Cooling Or The Like Of Electrical Apparatus (AREA)
• Inverter Devices (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=62749022

Family Applications (1)

Country Status (5)

Family Cites Families (17)

• 2017
  • 2017-12-18 FR FR1762371A patent/FR3075563B1/fr active Active
• 2018
  • 2018-11-28 JP JP2020533006A patent/JP7177836B2/ja active Active
  • 2018-11-28 WO PCT/EP2018/082886 patent/WO2019120915A1/fr unknown
  • 2018-11-28 US US16/955,168 patent/US11323012B2/en active Active
  • 2018-11-28 EP EP18807638.4A patent/EP3729926A1/de active Pending

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