FR3161821A1 - Power electronic device for environments with high thermal constraints - Google Patents

Abstract

The invention relates in particular to a power electronic device (200) comprising at least one power electronic element and at least one control electronic element (505), the device comprising a heat exchange plate (400), said plate comprising at least a portion of a hydraulic heat dissipation circuit and comprising a fluid inlet (510) of said at least a portion of said hydraulic circuit and a fluid outlet (405) of said at least a portion of said hydraulic circuit, the heat exchange plate being placed between said at least one power electronic element and said at least one control electronic element. Figure for the abstract: Figure 8

Description

Power electronic device for environments with high thermal constraints

The invention relates to the integration of electronic components and in particular the integration of power and control electronic components in devices for environments with strong thermal constraints, for example power electronic devices for aircraft turbomachinery.

Previous techniques

Climate change is a major concern for many legislative and regulatory bodies worldwide. Indeed, various restrictions on carbon emissions have been, are being, or will be adopted by different countries. In particular, an ambitious standard applies to both new types of aircraft and those already in operation, requiring the implementation of technological solutions to bring them into compliance with current regulations. Civil aviation has been actively working for several years now to contribute to the fight against climate change.

Technological research efforts have already led to very significant improvements in the environmental performance of aircraft. The Applicant takes into account the factors impacting all phases of design and development in order to obtain aeronautical components and products that are less energy-intensive, more environmentally friendly, and whose integration and use in civil aviation have moderate environmental impacts, with the aim of improving the energy efficiency of aircraft.

Consequently, the Applicant is constantly working to reduce its climate impact by using methods and operating virtuous development and manufacturing processes that minimize greenhouse gas emissions to the minimum possible in order to reduce the environmental footprint of its activity.

This sustained research and development work focuses on new generations of aircraft engines, the weight reduction of aircraft, particularly through the materials used and lighter on-board equipment, the development of the use of electrical technologies to provide propulsion, and, as essential complements to technological progress, aviation biofuels.

The need to limit carbon dioxide emissions in the aviation industry is pushing manufacturers towards fully electric solutions that are as low-carbon as possible. These new engines must be optimized to offer greater compactness, efficiency, and flexibility than conventional engines. While awaiting such fully electric solutions, hybrid solutions have been developed.

The electrical hybridization of a turbomachine in an aircraft is achieved by an electrical system that interfaces between the mechanical shafts (for example, the shafts of the high-pressure and low-pressure systems) and the aircraft's electrical network. This system must, in particular, be able to supply the electrical network with direct current (for example, by drawing power from the shafts of the high-pressure and low-pressure systems and distributing it, in a controlled manner, to the network), inject or draw power from the mechanical shafts according to the instructions received by a specific computer (ECU, acronym for Engine Control Unit in Anglo-Saxon terminology) of the turbomachine, supply power to the shafts of the high-pressure and low-pressure systems during the start-up of the turbomachine (this power may come from a source external to the network), and/or reconfigure itself according to internal or external failures.

In some solutions, electrical sources are connected in parallel, with appropriate control laws to guarantee the quality of the electrical network and the management of power sharing. These laws are generally implemented in power electronic devices installed near the power sources, for example in turbomachinery.

However, a nacelle, i.e. a support assembly and cowlings of an engine of a multi-engine aircraft, offers little space and each element must be optimized as much as possible to save mass, volume and efficiency, while satisfying strong mechanical and thermal constraints to meet the required reliability criteria.

Therefore, there is a need to improve the integration of electronic components in a device for an environment with strong thermal constraints.

The invention is the result of technological research aimed at significantly improving aircraft performance and, in this sense, contributes to reducing the environmental impact of aircraft.

One aim of the invention is to provide an integration of electronic components in a device for an environment with high thermal constraints and very limited space. Such a device can notably be integrated into electric or hybrid aircraft propulsion systems, particularly for short or vertical takeoffs and landings, known as VTOL (Vertical Take Off and Landing in Anglo-Saxon terminology) and STOL (Short Take Off and Landing in Anglo-Saxon terminology), or into conventional aircraft propulsion systems.

According to one aspect, the invention relates to a power electronic device comprising at least one power electronic element and at least one control electronic element, the device comprising a heat exchange plate, said plate comprising at least a part of a hydraulic circuit for heat evacuation and comprising a fluidic inlet of said at least a part of said hydraulic circuit and a fluidic outlet of said at least a part of said hydraulic circuit, the heat exchange plate being placed between said at least one power electronic element and said at least one control electronic element.

The device according to the invention can thus be installed in an environment subject to high ambient air temperatures, which may exceed an operating temperature limit of components of the device, for example more than 150°C, with little or no fresh air supply, such as the environment of an aircraft engine.

According to one characteristic, said at least one electronic control element is closer to said fluidic inlet than to said fluidic outlet.

According to one characteristic, said at least one power electronic element comprises at least a first and a second element, the first element having an operating temperature limit lower than an operating temperature limit of the second element, the first element being closer to said fluidic inlet than to said fluidic outlet and the second element being closer to said fluidic outlet than to said fluidic inlet.

According to another characteristic, the device further includes at least one heat drain, the heat drain comprising an electrically conductive element connecting an electrical connector to said at least one power electronic element and comprising an electrically insulating and thermally conductive component between the heat exchange plate and said electrically conductive element.

According to a further characteristic, said at least one part of said hydraulic heat evacuation circuit comprises at least one cavity connected directly or indirectly to said fluidic inlet and said fluidic outlet.

According to one characteristic, said at least one cavity comprises a set of studs extending from a surface of said at least one cavity to an opposite surface of said at least one cavity, along a transverse axis of said heat exchange plate.

According to one characteristic, said heat exchange plate includes at least one opening configured to allow the establishment of electrical contact between said at least one power electronic element and said at least one control electronic element.

According to one characteristic, the device further comprises a protective enclosure forming a closed space in which are configured the heat exchange plate, the hydraulic circuit, said at least one electronic power element and said at least one electronic control element.

According to one characteristic, the said hydraulic circuit is a first hydraulic circuit, the said protective enclosure comprising a second hydraulic circuit configured to extract calories from the said enclosed space.

In another aspect, the invention relates to an aircraft turbomachine comprising a power electronic device as described above. The characteristics of the power electronic device contribute to the compactness and reliability of the turbomachine.

Other objects, features and advantages of the invention will become apparent from the following description, given solely by way of non-limiting example, and made with reference to the accompanying drawings in which:

FIG. 1 schematically represents an architecture of a hybrid turbomachine in which the invention can be implemented;

FIG. 2 And FIG. 3 illustrate an example of a power electronic device, according to embodiments of the invention;

FIG. 4 And FIG. 5 represent a schematic, perspective view of the power electronic device illustrated in figures 2 and 3, without the cover, according to embodiments of the invention;

FIG. 6 represents a schematic view of the power electronic device illustrated in figures 2 and 3, without the cover, seen from the side including the power electronic components, according to embodiments of the invention;

FIG. 7 represents a schematic view of the power electronic device illustrated in figures 2 and 3, without the cover, seen from the side including the electronic control components, according to embodiments of the invention;

FIG. 8 represents a schematic cross-sectional view of the power electronic device illustrated in figures 2 and 3, without the cover, along a longitudinal plane perpendicular to the heat exchange plate, according to embodiments of the invention;

FIG. 9 represents a schematic cross-sectional view of the heat exchange plate of the power electronic device illustrated in Figures 2 and 3, along a plane parallel to the heat exchange plate, according to embodiments of the invention; and

FIG. 10 represents a schematic view of a thermal drain of the power electronic device illustrated in figures 2 and 3, seen in cross-section, according to embodiments of the invention.

Detailed description of at least one embodiment

The detailed description of particular embodiments of the invention refers to the drawings in which the same references identify the same structural elements in each of the figures.

There FIG. 1 schematically represents an architecture of a hybrid turbomachine in which the invention can be implemented.

As illustrated, the turbomachine 100 comprises a high-pressure zone 105 and a low-pressure zone 110. The high-pressure zone 105 includes an electric machine, for example, a permanent magnet synchronous machine 115 comprising, for example, two independent stator windings connected to the high-pressure shaft of the turbomachine via a gearbox 120. Similarly, the low-pressure zone 110 includes an electric machine, for example, a permanent magnet synchronous machine 125 comprising, for example, two independent stator windings connected to the low-pressure shaft of the turbomachine. Each of the electric machines can be used as a power source or, conversely, as a drive motor.

A bidirectional DC/AC converter (DC/AC stands for Direct Current and Alternating Current, respectively) is connected to each stator winding of the permanent magnet synchronous machine 115. These bidirectional DC/AC converters, using, for example, BBC (Bus Bar Capacitor) type capacitors, are designated 130-1 and 130-2. Similarly, a bidirectional DC/AC converter is connected to each stator winding of the electric machine 125. These bidirectional DC/AC converters are designated 135-1 and 135-2.

In addition, two electrical distribution controllers 140-1 and 140-2, also called PDMU (short for Power Distribution Management Unit in Anglo-Saxon terminology), putting the two pairs of converters in parallel to the same DC power bus referenced 145, allow the distribution of high-voltage electrical energy, also called HVDC (short for High Voltage DC in Anglo-Saxon terminology), to the aircraft and to the internal loads of the turbomachine, referenced 150-1 and 150-2.

According to embodiments of the invention, a power electronic device, for example one of the converters 130-1, 130-2, 135-1 or 135-2 illustrated in the FIG. 1 The system includes a heat exchange plate separating power electronics, used to convert current, from control electronics, used to control the converter and its operation. Thus, the power electronics are located on one side (one face) of the heat exchange plate, and the control electronics are located on the other side (another face) of the heat exchange plate. In some embodiments, the heat exchange plate includes a hydraulic circuit for heat dissipation, for example, a circuit in which a heat transfer fluid such as oil can circulate, or a portion of such a circuit, hereinafter referred to as the internal hydraulic circuit. The heat exchange plate may also be thermally connected to another hydraulic circuit or be located near such another hydraulic circuit to dissipate heat from these hydraulic circuits using the heat exchange plate. The heat exchange plate, for example, is made of aluminum alloy, such as series 6 or series 5, with an additive content that facilitates heat transfer. As an example, it can also be made of steel or bronze.

The heat exchanger plate is preferably connected to ground, for example using a metal braid, to create an electromagnetic shield between the components located on either side of the heat exchanger plate. This electromagnetic shielding prevents noise generated by power electronics from affecting control electronics, or significantly reduces this effect.

Figures 2 and 3 illustrate an example of a 200 power electronic device, for example one of the 130-1, 130-2, 135-1 or 135-2 converters shown on the FIG. 1 , according to embodiments of the invention.

As illustrated, the power electronic device 200 includes a hood or cover, for example in two parts 205-1 and 205-2, forming a protective enclosure or thermal shield with the external environment. The hood or cover forms an enclosed space in which the heat exchanger plate, the hydraulic circuit, and the power and control electronic components are configured. It may be made of plastic, composite materials, or aluminum. In some embodiments, the cover includes an external hydraulic circuit, preferably separate from the internal hydraulic circuit, to dissipate heat from the environment surrounding the power electronic device 200 that would otherwise accumulate in its hood. The external hydraulic circuit includes an inlet (not shown), for example, an inlet for a heat transfer fluid such as oil, for example, oil at a temperature between -40°C and 90°C, and an outlet (not shown). The inlet and outlet can be fitted with standard connectors for connection to an external hydraulic circuit, for example, a nacelle cooling hydraulic circuit. Alternatively or additionally, the hood or cover includes thermal insulation, for example, plastic insulation (e.g., a resin such as polyetheretherketone) or composite insulation (e.g., carbon fiber), preferably with a metal braid to allow for the transfer of mechanical mass (e.g., harness mass) and electrical mass.

Furthermore, the power electronic device 200 includes the internal hydraulic circuit (at least part of which belongs to the heat exchanger plate) for dissipating heat that accumulates inside the power electronic device 200. The internal hydraulic circuit includes a fluid inlet (cold fluid), referenced 510, for example, an inlet for a heat transfer fluid such as oil, for example, oil at a temperature between -40°C and 90°C, and a fluid outlet (hot fluid), referenced 405. Again, the inlet and outlet can be fitted with standard connectors for connection to an external hydraulic circuit, for example, a hydraulic cooling circuit for a nacelle. For example, FIG. 3 , the fluidic inlet 510 of the internal hydraulic circuit here includes a connector 215 and the fluidic outlet 405 of the internal hydraulic circuit here includes a connector 210.

The thick arrows (in figures 2 and 3 and in the following figures) represent the preferred direction of flow of the cooling fluid in the internal hydraulic circuit of the power electronic device.

The 200 power electronics unit also includes electrical connectors, for example, electrical connectors 220 and 225, HVDC connectors 230-1 and 230-2 for high-voltage direct current, and HVAC connectors (High Voltage AC in Anglo-Saxon terminology) 235-1, 235-2, and 235-3 for high-voltage alternating current. These connectors allow, for example, the 200 power electronics unit to be connected to the stator windings of electrical machines and to electrical distribution controllers, as described in reference to the FIG. 1 .

The power electronic device 200 also includes fixing elements, generically referenced 240, to allow its fixing, for example on a platform, for example using screws or rivets.

Figures 4 and 5 show a schematic, perspective view of the power electronic device illustrated in Figures 2 and 3, without the cover, according to embodiments of the invention. FIG. 4 illustrates the power electronic device from the side comprising the power electronic elements or components and the FIG. 5 illustrates the power electronic device of the side comprising the electronic control elements or components, the power electronic components and the electronic control components being separated by a heat exchange plate referenced 400.

Figures 4 and 5 also show the fluidic inlet 510 of the internal hydraulic circuit, at least part of which is included in the heat exchange plate 400 (another part could, for example, consist of a pipe located in the space between the heat exchange plate 400 and one of the hoods or covers 205-1 and 205-2). Such a pipe can be used to capture heat from an element of the power electronic device and/or to connect the fluidic inlet and/or the fluidic outlet of the heat exchange plate 400 to a hydraulic circuit external to the power electronic device.

As illustrated, the power electronic device here comprises a 500 cable harness and a 505 electronic board including the electronic control components.

There FIG. 6 represents a schematic view of the power electronic device illustrated in figures 2 and 3, without the cover, seen from the side including the power electronic components, according to embodiments of the invention.

As illustrated, the side of the heat exchanger plate 400 containing the power electronics components includes several heat drainage zones, referenced 600, 605, and 610. Heat drainage zone 600 allows heat from resistors, generically referenced 602, and heat from the external environment of the power electronics device, captured by heat drains (which also function as connectors), generically referenced 604, to be drained to the heat exchanger plate 400, as described below with reference to the FIG. 10 A thermal drain 604 is associated with each resistor 602. The thermal drainage area 605 allows heat emitted by the input filtering inductance dV/dt, used for electrical noise reduction and overvoltage protection, to be drained towards the heat exchange plate 400. The thermal drainage zone 610 allows heat from an output DC filter, including a capacitor 615 (e.g., of the BBC type) and an inductor 620, to be drained to the heat exchange plate 400. In addition to its role as an inductor in the filtering module, the inductor 620 establishes a thermal bridge between the heat exchange plate 400 and the connectors 230-1 and 230-2, to reduce the propagation of heat from the external environment of the power electronic device into it (the housing of the inductor 620 is, for example, in direct contact with the heat exchange plate 400, preferably via a thermal pad (to limit the presence of air between the inductor and the heat exchange plate)).

Naturally, many other implementations are possible, both in terms of positioning and/or components, the latter depending in particular on the nature of the power electronic device and its characteristics. For example, the 604 thermal drains are optional.

All the resistors, the input inductance and the filter module are arranged according to their characteristics (in particular according to their function and their cooling needs) and according to the direction of fluid flow in the internal hydraulic circuit in order to protect the electronic components having low operating temperature limits and to confine the heat coming from the power section by preventing its diffusion towards the control section.

The power stage components with the lowest operating temperatures and lowest operating temperature limits, particularly the filter module (in thermal drainage zone 610), are thus located on the fluid inlet side. Less critical components (especially the inductor and resistor assembly) are located on the fluid outlet side, where the fluid is hotter (due to heat loss from the various upstream components, depending on the direction of the cooling fluid flow). For example, the operating temperature limits for the filter module (in thermal drainage zone 610), the dV/dt inlet filter inductor (in thermal drainage zone 605), and the resistor assembly (in thermal drainage zone 600) are 105°C, 150°C, and 180°C, respectively, as the power electronics device can be placed in an environment where the ambient temperature (device environment) exceeds 150°C.

As described with reference to the FIG. 10 , thermal drains 604 allow thermal insulation, at least partially, of electrical cables external to the power electronic device and electrically connected to elements of it, which may pass through very hot areas before reaching the power electronic device (which may exceed 150°C) and therefore be likely to bring heat into the power electronic device.

There FIG. 7 represents a schematic view of the power electronic device illustrated in figures 2 and 3, without the cover, seen from the side including the electronic control components, according to embodiments of the invention.

The electronic control components are arranged here on the electronic board 505. In some embodiments, the electronic board 505 is located near the fluid inlet 510 of the internal hydraulic circuit. As illustrated in the FIG. 8 As detailed below, the 505 electronic control board is thus thermally positioned on the same, cooler side as the output filter module of the power section. This, combined with the separation of the power electronics and the control electronics by the 400 heat exchanger plate, effectively limits the thermal influence of the power electronic components on the control electronic components.

There FIG. 8 represents a schematic cross-sectional view of the power electronic device illustrated in figures 2 and 3, without the cover, along a longitudinal plane perpendicular to the heat exchange plate 400, according to embodiments of the invention.

As illustrated, the output filter module (in the thermal drainage area 610), including the power electronic components, notably the capacitor 615, which has the lowest operating temperature limit, and the electronic board 505 including the electronic control components are placed on the fluidic inlet side 510, and separated by the heat exchange plate 400.

As illustrated, the thermal drains 604 (in the thermal drainage zone 600), whose purpose is to limit the heat input from external electrical cables, connected to connectors 235-1, 235-2 and 235-3, inside the power electronic device, are located here as close as possible to connectors 235-1, 235-2 and 235-3 (with one thermal drain per connector) and as close as possible to the fluidic outlet 405.

The resistors (in the thermal drainage zone 600) having an operating temperature limit higher than that of the input filter inductance dV/dt (in the thermal drainage zone 605), itself having an operating temperature limit higher than that of the output filter module (in the thermal drainage zone 610), these elements are arranged here, from the fluidic inlet side 510 to the fluidic outlet side 405, as follows: the output filter module then the input filter inductance dV/dt then the resistors.

There FIG. 9 represents a schematic cross-sectional view of the heat exchange plate of the power electronic device illustrated in figures 2 and 3, along a plane parallel to the heat exchange plate, according to embodiments of the invention.

As illustrated, the internal hydraulic circuit here comprises cooling fluid circulation channels, generically referred to as 900, connecting the fluid inlet 510 to the fluid outlet 405 via heat exchange zones, also generically referred to as 905. These heat exchange zones are, for example, cavities that may include pads, such as diamond-shaped pads, to increase the contact area between the cooling fluid and the heat exchange plate 400, thereby improving heat transfer between the cooling fluid and the heat exchange plate. The size and density of these pads are determined according to the heat exchange requirements. These pads may also have a different shape, or all pads may have a different shape.

According to the illustrated example, the fluid inlet 510, accessible via connector 215, leads to a first circulation channel 900-1, allowing the cooling fluid to reach a first heat exchange zone consisting essentially of a first cavity 905-1 equipped with studs. The first cavity 905-1 opens onto a second channel 900-2, allowing the cooling fluid to reach a second heat exchange zone, consisting essentially of a second cavity 905-2, also equipped with studs. Similarly, the second cavity 905-2 opens onto a third channel 900-3, allowing the cooling fluid to reach a third heat exchange zone, consisting essentially of a third cavity 905-3, again equipped with studs. Similarly, the third cavity 905-3 opens onto a fourth channel 900-4, allowing the cooling fluid to reach a fourth heat exchange zone, essentially consisting of a fourth cavity 905-4, also equipped with studs. As illustrated, the fourth cavity 905-4 is here open onto a fifth channel 900-5, allowing the cooling fluid to reach the fluid outlet 405 of the heat exchange plate, to which the connector 210 is attached.

With reference to figures 6 and 8, the first two cavities correspond to the thermal drainage zone 610, the third cavity corresponds to the thermal drainage zone 605 and the fourth cavity corresponds to the thermal drainage zone 600.

Furthermore, the heat exchanger plate 400 may include openings, such as openings 910 and 915. These openings allow for the exchange of information, such as electrical signals, between the sides of the heat exchanger plate 400, for example, using cables or cards. This makes it possible to reduce the length of communication cables and thus improve the reliability and reduce the weight of the power electronics device.

As described previously, the 400 heat exchanger plate can be made of aluminum alloy, steel, or bronze. It can be manufactured from two half-plates, each engraved on one face with a pattern representing a portion of the internal hydraulic circuit. The two half-plates are joined together with the patterns facing each other. The internal hydraulic circuit is sealed, for example, by bonding or a gasket. The choice of patterns, as well as the shape, size, and density of the studs, is determined by the heat drainage zones to be created. Each heat drainage zone can include a heat exchange zone through which the cooling fluid circulates. The heat exchange zones can be similar or different in shape, connected by channels, as illustrated in the diagram. FIG. 9 They can also consist of a single, serpentine-shaped pipe, the density of which defines each zone. Other shapes can be used, and it is possible to combine several shapes.

The dimensions of the internal hydraulic circuit can depend in particular on the fluidity of the cooling fluid and its pressure.

It is noted here that while, in the illustrated example, the fluid inlet and fluid outlet are located on opposite edges of the heat exchange plate 400, they can also be located on adjacent edges or on the same edge. According to other embodiments, the fluid inlet and/or fluid outlet are located on the same face (i.e., on the same side) or on different faces (i.e., on different sides) of the heat exchange plate 400.

It is also observed that several heat exchange plates can be connected to each other and that a heat exchange plate can have more than one fluidic inlet and/or more than one fluidic outlet.

There FIG. 10 represents a schematic view of a thermal drain of the power electronic device illustrated in figures 2 and 3, seen in cross-section, according to embodiments of the invention.

The thermal drain shown is the 604 thermal drain from the FIG. 6 , which connects connector 235-3 to resistor 602 of the FIG. 6 Similar thermal drains can be used to connect each of the 235-2 and 235-3 connectors to an associated resistor.

As illustrated, the heat drain includes a bridge or terminal block 1000 to connect an electrical bus 1005 to connector 235-3, the electrical bus 1005 being itself connected to resistor 602 of the FIG. 6 The bridge 1000 is made of an electrically and thermally conductive material, for example, aluminum or steel. The heat sink also includes a support 1010 interposed between the bridge 1000 and the heat exchange plate 400. The support 1010 is made of an electrically insulating and thermally conductive material, for example, ceramic. The assembly formed by the bridge 1000 and the support 1010 thus allows at least some of the heat received from the connector 235-3 (and/or from elements of the power electronics device electrically connected to the bridge 1000) to be transferred to the heat exchange plate 400 (from where it is dissipated outside the power electronics device using the cooling fluid), while electrically isolating the bridge 1000 from the heat exchange plate 400, which then acts as electromagnetic shielding when grounded.

The assembly consisting of the bridge 1000 and the support 1010 can be attached to the heat exchange plate 400 using a fixing piece 1015, which may be in the form of a cover. This fixing piece is, for example, made of plastic. A thermal pad 1020 can be inserted between the support 1010 and the heat exchange plate 400 to limit the presence of air between the support 1010 and the heat exchange plate 400 and thus promote heat drainage.

Of course, the present invention is not limited to the embodiments described above by way of example. It extends to other variants.

Although described through a number of detailed embodiments, the proposed device and system include various variants, modifications, and improvements that will be obvious to those skilled in the art, it being understood that these various variants, modifications, and improvements form part of the scope of the invention, as defined by the following claims. Furthermore, the various aspects and features described above may be implemented together, separately, or substituted for one another, and all the different combinations and subcombinations of these aspects and features form part of the scope of the invention. In addition, some of the systems and equipment described above may not incorporate all the modules and functions described for the preferred embodiments.

Claims (10)

Power electronic device (200) comprising at least one power electronic element and at least one control electronic element (505), the device comprising a heat exchange plate (400), said plate comprising at least a portion of a hydraulic heat evacuation circuit and comprising a fluid inlet (510) of said at least a portion of said hydraulic circuit and a fluid outlet (405) of said at least a portion of said hydraulic circuit, the heat exchange plate being placed between said at least one power electronic element and said at least one control electronic element. Device according to claim 1, wherein said at least one electronic control element is closer to said fluidic inlet than to said fluidic outlet. Device according to claim 1 or claim 2, wherein said at least one power electronic element comprises at least a first element and a second element, the first element having an operating temperature limit lower than an operating temperature limit of the second element, the first element being closer to said fluidic inlet than to said fluidic outlet and the second element being closer to said fluidic outlet than to said fluidic inlet. Device according to any one of claims 1 to 3, further comprising at least one heat drain, the heat drain comprising an electrically conductive element (1000) connecting an electrical connector (235-3) to said at least one power electronic element and comprising an electrically insulating and thermally conductive component (1010) between the heat exchange plate (400) and said electrically conductive element. Device according to any one of claims 1 to 4, wherein said at least a part of said hydraulic heat evacuation circuit comprises at least one cavity connected directly or indirectly to said fluidic inlet (510) and to said fluidic outlet (405). Device according to claim 5, wherein said at least one cavity comprises a set of studs extending from a surface of said at least one cavity to an opposite surface of said at least one cavity, along a transverse axis of said heat exchange plate. Device according to any one of claims 1 to 6, wherein said heat exchange plate comprises at least one opening (910) configured to permit the establishment of electrical contact between said at least one power electronic element and said at least one control electronic element. Device according to any one of claims 1 to 7, further comprising a protective enclosure forming a closed space in which are configured the heat exchange plate, the hydraulic circuit, said at least one power electronic element and said at least one control electronic element. Device according to claim 8, wherein said hydraulic circuit is a first hydraulic circuit, said protective enclosure comprising a second hydraulic circuit configured to extract heat from said enclosed space. Aircraft turbomachine comprising a device according to any one of claims 1 to 9.