Electric hybrid system with integrated filtering function

Abstract

Electrical hybridization system with integrated filtering function. The invention relates to an electrical hybridization system (500) for an aircraft, the system comprising a first electric machine (100), a second electric machine (200), two electrical power distribution units (330, 340) each having a high-voltage distribution busbar (335, 345), a first output (337, 347) and at least one second output (339, 349), each electric machine (100, 200) comprising a first winding (110, 210) and a second winding (120, 220), and the system further comprising, for each electric machine (100, 200), a first AC / DC converter (130, 230), and a second AC / DC converter (140, 240), the system further comprising a DC filtering unit (360) and a distribution box (300) in which are housed the two electrical power distribution units (330, 340) and the direct current filtering unit (360),said DC filtering unit (360) being connected, for each electrical power distribution unit (330, 340), between the high-voltage distribution busbar (335, 345) and the first output (337, 347). Figure for the abbreviation: Fig. 2,

Description

Title of the invention: Electrical hybridization system with integrated filtering function. Technical field

[0001] The present invention relates to the field of electrically or hybrid-powered aircraft and more particularly to the architecture of distribution boxes for such aircraft. Previous technique

[0002] 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 various states. In particular, an ambitious standard applies to both new types of aircraft and those currently in operation, requiring the implementation of technological solutions to bring them into compliance with current regulations. Civil aviation has been actively contributing to the fight against climate change for several years now.

[0003] 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.

[0004] The Applicant is working in research and development on new generations of engines, the lightening of devices, in particular through the materials used and lighter on-board equipment, electrical technologies to ensure propulsion, and electric biofuels.

[0005] In this context, the DO 160 standard, designed for environmental testing of avionics equipment, requires a reduction of noise at the source in aircraft.

[0006] Existing solutions propose integrating a DC continuous filter into the electronic converters located between the electrical machines and the electrical power distribution units in order to limit noise at the source. Generally, a block containing DC filters is placed as close as possible to the noise source. This leads to the presence of a single, bulky block in the power electronics stage of the device. This makes the electrical hybridization system heavy and cumbersome.

[0007] Thus, there is a real need for an electrical hybridization system with good filtering capacity, without the drawbacks inherent in the aforementioned known solutions. Description of the invention

[0008] To this end, the invention proposes an electrical hybridization system for an aircraft, the system comprising a first reversible electric machine intended to be connected to a low pressure shaft, a second reversible electric machine intended to be connected to a high pressure shaft, two electrical power distribution units each comprising a high voltage distribution bar, a first output intended to be connected to the aircraft's electrical network and at least a second output intended to be connected to at least one local load. Each electrical machine comprises a first winding and a second winding. And, the system further comprises, for each electrical machine, a first alternating direct current (AC / DC) converter coupled between the first winding of the electrical machine and one of the two electrical power distribution units, and a second AC / DC converter coupled between the second winding of the electrical machine and the other electrical power distribution unit.

[0009] According to a general feature of the system according to the invention, the system further comprises a DC filtering unit and a distribution box in which the two electrical power distribution units and the DC filtering unit are housed. The DC filtering unit is connected, for each electrical power distribution unit, between the high-voltage distribution busbar and the first output.

[0010] Such an electrical hybrid system architecture makes it possible to ensure DC filtering upstream of the aircraft network while limiting the mass and volume of the electrical hybrid system. Electrical hybrid systems generally have converters that perform a filtering function. The presence of the filtering unit in the distribution box makes it possible to minimize the mass and volume of the system's converters, as the filtering unit in the distribution box at least partially handles the DC filtering function in the system.

[0011] According to a particular feature of the hybridization system, the distribution box may comprise a first compartment containing the filtering unit, and a second compartment containing the electrical power distribution units. Thus, it is possible to physically separate the filtering unit and the electrical power distribution units. This makes it possible to obtain a hybridization system with flexibility in each zone, namely the distribution zone and the filtering zone. Furthermore, this allows the hybridization system to be adapted to filtering units with different architectures.

[0012] According to a particular feature of the electric hybridization system, the distribution box may further include a third compartment comprising at least one electronic card, the third compartment being separate from the first compartment and the second compartment.

[0013] This allows for physical separation between the filtering unit and the electronic board or plurality of electronic boards. Thus, each compartment can operate independently within an acceptable thermal range. Furthermore, noise present in the compartment containing the filtering unit does not disturb the compartment containing the electronic board, and vice versa.

[0014] According to a particular feature of the electrical hybridization system, each electrical power distribution unit may include a first input connected to the first electrical machine via one of the AC / DC converters coupled to the first electrical machine and a second input connected to the second electrical machine via one of the AC / DC converters coupled to the second electrical machine.

[0015] According to a particular feature of the electrical hybridization system, the distribution box may comprise a plurality of faces, and the first inputs, second inputs, first outputs, and second outputs of the electrical power distribution units may be mounted on the same face of the distribution box. This makes it easier to orient the equipment and components within the distribution box.

[0016] According to another particular feature of the electrical hybridization system, the distribution box may comprise a plurality of faces, and the first and second inputs of the electrical power distribution units may be mounted on a first face, while the first and second outputs of the electrical power distribution units may be mounted on a second face of the distribution box separate from the first face of the distribution box. This facilitates the routing of the high-voltage distribution busbar cables.

[0017] According to a particular feature of the electrical hybridization system, the first AC / DC converter and the second AC / DC converter may each further comprise a DC preliminary filtering unit. The DC preliminary filtering units may each be configured to filter at a first level, and the distribution box filtering unit may be configured to filter at a second level. Both the first and second levels of filtering are lower than the filtering level required by the network. the electrical system of the aircraft to which the system is intended to be connected, and the combination of the first level of filtering with the second level of filtering may be at least equal to the level of filtering required by the electrical system of the aircraft to which the system is intended to be connected.

[0018] Such a system optimizes the filtering function within the hybrid system. Indeed, the presence of the distribution box's filtering unit and the preliminary filtering units allows the filtering function to be distributed between the converters and the distribution box.

[0019] Furthermore, this ensures redundancy for filtering in the electric hybrid system. For example, when one or both of the preliminary filtering units are damaged, the filtering unit in the distribution box can continue to partially perform the current filtering function in the system, and vice versa.

[0020] According to another aspect of it, the invention proposes an aircraft comprising the electric hybridization system described above.

[0021] According to another aspect of the invention, the invention provides an electrical hybridization system for an aircraft, the system comprising a first reversible electric machine intended to be connected to a low-pressure shaft, a second reversible electric machine intended to be connected to a high-pressure shaft, two electrical power distribution units each comprising a high-voltage distribution busbar, a first output intended to be connected to the aircraft's electrical network and at least a second output intended to be connected to at least one local load, each electric machine comprising a first winding and a second winding, and the system further comprising, for each electric machine, a first AC / DC converter coupled between the first winding of the electric machine and one of the two electrical power distribution units,and a second AC / DC converter coupled between the second winding of the electric machine and the other electrical power distribution unit.

[0022] According to a general feature of the system according to the invention, the system further comprises a first DC filtering unit, a second DC filtering unit, a first distribution box housing the first power distribution unit and the first filtering unit, and a second distribution box housing the second power distribution unit and the second DC filtering unit, each DC filtering unit being connected to the electrical power distribution unit (330, 340) housed in the same box between the high voltage distribution busbar and the first output of said electrical power distribution unit.

[0023] Such an electrical hybrid system architecture makes it possible to ensure DC filtering upstream of the aircraft network while limiting the mass and volume of the electrical hybrid system. Electrical hybrid systems generally have converters that perform a filtering function. The presence of two filtering units, one in each distribution box, makes it possible to minimize the mass and volume of the converters associated with each distribution box, each filtering unit at least partially handling the DC filtering function in the system.

[0024] According to a particular feature, each distribution box may include a first compartment comprising the filtering unit which is housed in said distribution box, and a second compartment comprising the electrical power distribution unit which is housed in said distribution box.

[0025] This allows for distribution boxes with flexibility in each zone, namely the distribution zone and the filtering zone. Furthermore, it allows each box to be adapted to filtering units with different architectures.

[0026] According to a particular feature, each distribution box may further include a third compartment comprising at least one electronic card, the third compartment being separate from the first compartment and the second compartment.

[0027] This allows for physical separation between the filtering unit and the electronic board or multiple electronic boards within each distribution box. Thus, each compartment can operate independently within an acceptable temperature range. Furthermore, noise present in the compartment containing the filtering unit does not disturb the compartment containing the electronic board, and vice versa.

[0028] According to a particular feature, each electrical power distribution unit may include a first input connected to the first electrical machine via one of the AC / DC converters coupled to the first electrical machine and a second input connected to the second electrical machine via one of the AC / DC converters coupled to the second electrical machine.

[0029] According to a particular feature, each distribution box can comprise a plurality of faces, and the first input, second input, first output and second output of the electrical power distribution units are mounted on the same face of each distribution box.

[0030] This makes it easier to orient the equipment and components within each distribution box.

[0031] According to a particular feature, each distribution box may comprise a plurality of faces, and the first input and second input of the electrical power distribution units may be mounted on a first face of each distribution box, while the first output and second output of the electrical power distribution units may be mounted on a second face of each distribution box distinct from the first face of each distribution box.

[0032] This facilitates the routing of cables from the upper distribution bar voltage of each distribution box.

[0033] According to a particular feature, the first AC / DC converter and the second AC / DC converter may each further comprise a DC preliminary filtering unit, the DC preliminary filtering units being configured to filter each at a first level, and the first DC filtering unit and the second DC filtering unit being configured to filter at a second level of filtering, the first level of filtering and the second level of filtering each being lower than the level of filtering required by the electrical network of the aircraft to which the system is intended to be connected, and the combination of the first level of filtering with the second level of filtering being at least equal to the level of filtering required by the electrical network of the aircraft to which the system is intended to be connected.

[0034] This makes it possible to optimize the filtering function within the hybrid system. Indeed, the presence of a filtering unit in each distribution box and preliminary filtering units allows the filtering function to be distributed between the converters and the two distribution boxes. Furthermore, this ensures redundancy for the filtering in the electrical hybrid system. For example, when one or both of the preliminary filtering units are damaged, the filtering units in the distribution box can continue to partially perform the current filtering function in the system, and vice versa.

[0035] According to another aspect of it, the invention proposes an aircraft comprising the electric hybridization system described above. Brief description of the drawings

[0036] Other features and advantages of the present invention will become apparent from the description given below, with reference to the attached drawings which illustrate an example of an embodiment without any limiting character.

[0037] [Fig.1] Fig.1 illustrates a first example of an electric hybridization system with a first example of a distribution box according to the invention,

[0038] [Fig.2] Fig.2 illustrates a second example of an electric hybridization system with a second example of a distribution box according to the invention,

[0039] [Fig.3] The [Fig.3] illustrates the distribution box of the system of the [Fig.2],

[0040] [Fig.4] Fig.4 illustrates a third example of a distribution box according to the invention,

[0041] [Fig.5] Figure [Fig.5] illustrates a third electrical hybridization system with two distribution boxes according to the invention,

[0042] [Fig.6A] Figure 6a illustrates a three-dimensional view of the distribution box of the system of [Fig.3],

[0043] [Fig.6B] Figure 6b illustrates a three-dimensional view of a fourth example of a distribution box according to the invention.

[0044] [Fig.7A] [Fig.7A] illustrates a three-dimensional view of the first distribution box of the system of [Fig.5],

[0045] Figure 7B illustrates a three-dimensional view of the second distribution box of the system of [Fig.5]. Description of the implementation methods

[0046] The invention applies generally to electrical hybridization systems and, more particularly, to electrical hybridization systems of aircraft comprising several electrical power distribution units.

[0047] Fig. 1 illustrates an example of an electric hybridization system according to the invention.

[0048] In the example illustrated in [Fig.1], the electrical hybridization system 500 comprises a first electric machine 100, a second electric machine 200, four AC / DC converters 130, 140, 230, 240, a distribution box 300, and a plurality of local loads 350, 351, 352, 353, 354, 355.

[0049] The first electric machine 100 and the second electric machine 200 can each be rotating electric machines. More specifically, the electric machines 100 and 200 can each be rotating electric machines of the PMG (Permanent Magnet Generator) type, known as permanent magnet generators. The first electric machine 100 is intended to be connected to a low-pressure shaft of an aircraft turbomachine, which is not shown in [Fig. 1]. The second electric machine 200 is intended to be connected to a high-pressure shaft of the aircraft turbomachine, which is not shown in [Fig. 1].

[0050] The first electric machine 100 comprises a first winding 110 and a second winding 120. The second electric machine 200 comprises a third winding 210 and a fourth winding 220. Windings 110, 120, 210, and 220 are stator windings. The number of windings present in each of the machines 100 and 200 is not a limitation of the invention. According to an embodiment that is not the one illustrated, each of the electrical machines can include a number of windings greater than two.

[0051] The first winding 110 is electrically connected to a first AC / DC converter 130. The second winding 120 is electrically connected to a second AC / DC converter 140. The third winding 210 is electrically connected to a third AC / DC converter 230. The fourth winding 220 is electrically connected to a fourth AC / DC converter 240.

[0052] Each of the AC / DC converters 130, 140, 230, and 240 includes a DC preliminary filtering unit 131, 141, 231, 241, as illustrated in [Fig. 1]. The presence of a preliminary filtering unit in each of the AC / DC converters 130, 140, 230, and 240 is not a limitation of the invention. According to an alternative embodiment not shown, the converters may be without a preliminary filtering unit.

[0053] According to one variant, only certain converters may include a DC preliminary filtering unit.

[0054] The distribution box 300 includes a first electrical power distribution unit 330, a second electrical power distribution unit 340 and a DC filtering unit 360.

[0055] The DC filtering unit 360 comprises several resistors 391 to 398, several capacitors 410 to 415, and several coils 401 to 404, as illustrated in Figures 3 and 4. The coils 401 to 404 can be inductors or coils. An inductor is a component comprising a winding of two coils around a single magnetic core. Resistor 391 is connected in series with resistor 392. Resistors 391 and 392 are connected in parallel with resistors 393 to 398. Capacitors 410 to 415 are connected in parallel with each other. Coils 401 and 403 are connected in series. These coils 401, 403 are connected in parallel with coils 402 and 404. Coil 403 is magnetically coupled to coil 404.

[0056] The position and number of resistors, capacitors and coils are not limiting to the invention.

[0057] All or only part of the resistors and / or capacitors and / or coils may be connected in parallel or in series.

[0058] The distribution box 300 may further include a control card 356 for monitoring parameters such as temperature, voltage or current of the DC filtering unit 360.

[0059] When the AC / DC converters each include a preliminary filtering unit, the control board 356 can monitor parameters such as the temperature, voltage or current of the DC filtering unit 360 and the DC preliminary filtering units 131, 141, 231, 241, as illustrated in [Fig.1].

[0060] The first electrical power distribution unit 330 further includes a high-voltage distribution busbar 335, a first switching component 333, a second switching component 334, a third switching component 336 and several fourth switching components 338.

[0061] The second electrical power distribution unit 340 further comprises a high-voltage distribution busbar 345, a fifth switching component 343, a sixth switching component 344, a seventh switching component 346, and several eighth switching components 348. In one embodiment, each of the switching components 333 to 338 and 343 to 348 may be a controlled switch. In yet another embodiment, some of the switching components may be a controlled switch.

[0062] According to yet another embodiment, each of the switching components can be a switching element comprising two poles. The two poles can be controlled by the same actuator.

[0063] According to yet another variant, part of the switching components may be a switching element comprising two poles controlled by the same actuator.

[0064] The first switching component 333 electrically connects the first electric machine 100 to the high-voltage busbar 335 of the first electrical power distribution unit 330, via the first AC / DC converter 130. The first switching component 333 is connected between a first input 331 of the first electrical power distribution unit 330 and its high-voltage busbar 335, the first input 331 of the first electrical power distribution unit 330 being connected to the first electric machine 100 via the first AC / DC converter 130.

[0065] The second switching component 334 electrically connects the second electric machine 200 to the high-voltage busbar 335 of the first electrical power distribution unit 330, via the third AC / DC converter 230. The second switching component 334 is connected between a second input 332 of the first electrical power distribution unit 330 and its high-voltage busbar 335, the second input 332 of the first electrical power distribution unit 330 being connected to the second electric machine 200 via the third AC / DC converter 230.

[0066] The fifth switching component 343 electrically connects the first electric machine 100 to the high-voltage distribution busbar 345 of the second electrical power distribution unit 340, via the second converter AC / DC 140. The fifth switching component 343 is connected between a first input 341 of the second electrical power distribution unit 340 and its high voltage busbar 345, the first input 341 being connected to the first electrical machine 100 via the second AC / DC converter 140.

[0067] The sixth switching component 344 of the second electrical power distribution unit 340 electrically connects the second electric machine 200 to the high-voltage distribution busbar 345 of the second electrical power distribution unit 340, via the fourth AC / DC converter 240. The sixth switching component 344 connects a second input 342 of the second electrical power distribution unit 340 and its high-voltage busbar 345, the second input 342 of the second electrical power distribution unit 340 being connected to the second electric machine 200 via the fourth AC / DC converter 240.

[0068] The first electrical power distribution unit 330 has a first output 337 for connection to the aircraft's electrical network. And, the second electrical power distribution unit 340 has a first output 347 for connection to the aircraft's electrical network.

[0069] The third switching component 336 of the first electrical power distribution unit 330 electrically connects the first electrical power distribution unit 330 to its first output 337. The seventh switching component 346 of the second electrical power distribution unit 340 electrically connects the second electrical power distribution unit 340 to its first output 347.

[0070] The local loads 350 to 355 may include aircraft components other than those powered by the aircraft's electrical network. The fourth switching components 338 of the first electrical power distribution unit 330 connect the first electrical power distribution unit 330 to second outputs 339 intended to be connected to the local loads 350, 351, and 352.

[0071] The eighth switching components 348 of the second electrical power distribution unit 340 connect the second electrical power distribution unit 340 to second outputs 349 intended to be connected to local loads 353, 354 and 355.

[0072] The power distribution housing 300 is a block comprising six faces 371 to 376. The first two faces 371 and 372 extend along an XY plane, the second two faces 373 and 374 extend along an XZ plane and the third two faces 375 and 376 extend along a YZ plane, as illustrated in Figures 6A and 6B.

[0073] As illustrated in [Fig. 1], the distribution box 300 comprises a filtering zone 320 and a distribution zone 310, separate from each other. The filtering zone 320 comprises the DC filtering unit 360. The distribution zone 310 comprises the first electrical distribution unit 330 and the second electrical power distribution unit 340, as illustrated in Figures 1 to 4.

[0074] In one variant, the distribution area 310 further includes the control card 356, as illustrated in Figures 1 to 3.

[0075] According to yet another variant, the control card 356 can extend partially into the distribution zone area 310 and partially into the filtering zone 320, as illustrated in [Fig.4].

[0076] In the example illustrated in [Fig. 1], the same compartment includes the filtering zone 320 and the distribution zone 310.

[0077] The DC current filtering unit 360 is connected, for the first electrical power distribution unit 330, between the first high voltage distribution bus 335 and its first output 337. The DC current filtering unit 360 is connected, for the second electrical power distribution unit 340, between the second high voltage distribution bus 345 and its first output 347.

[0078] The first and second inputs 331, 332, 341 and 342 of the electrical power distribution units 330 and 340, and the first and second outputs 337, 339, 347 and 349 of the electrical power distribution units 330 and 340 can be placed on the same face of the distribution box 300, as illustrated in Figures 2, 3 and 6A. Here, one of the first faces 372, which extends along the XY plane, has the first and second inputs 331, 332, 341 and 342 and the first and second outputs 337, 339, 347 and 349.

[0079] The position of the inputs and outputs is not limiting of the invention. According to another embodiment, the first and second inputs 331, 332, 341 and 342 of the electrical power distribution units 330 and 340 are placed on one of the second faces 373 of the distribution box 300. And, the first and second outputs 337, 339, 347 and 349 of the electrical power distribution units 330 and 340 are placed on the other second face 374 of the distribution box 300, as illustrated in [Fig. 4].

[0080] According to yet another embodiment, the first outputs 337, 347 are located on one of the first faces 371 of the distribution box 300. The second outputs 339, electrically connected to the first electrical power distribution unit 330, are located on one of the second faces 374 of the distribution box 300. The second outputs 349, electrically connected to the second electrical power distribution unit 340, are located on the other second face 373 of the box distribution 300. The first and second inlets 331, 341, 332, 342 are placed on the other first face 372 of the distribution housing 300, as illustrated in [Fig.1].

[0081] The DC filtering unit 360 can extend into the same compartment 381 as the two electrical power distribution units 330 and 340, as illustrated in [Fig. 1]. However, this feature is not limiting to the invention.

[0082] Figures 2 to 4 illustrate an electrical hybridization system 500 in which the distribution box 300 comprises a first compartment 382 containing the filtering unit 360, and a second compartment 383 containing the two electrical power distribution units 330 and 340.

[0083] Such a configuration makes it easier to segregate between the filtering zone 320 and the distribution zone 310. Thus, it is possible to avoid the propagation of faults from the filtering zone to the distribution zone and vice versa.

[0084] According to yet another variant, the electric hybridization system 500 further comprises at least one electronic board 400, as illustrated in [Fig. 6B]. This facilitates the control or command of the switching elements and communication between the various components of the distribution box. Moreover, it enables communication with equipment external to the distribution box.

[0085] Figure 6B illustrates an electrical hybridization system comprising a plurality of electronic boards 400. The distribution box 300 includes a third compartment 384 comprising the electronic board 400 or the plurality of electronic boards 400.

[0086] The presence of a plurality of electronic boards 400 allows the control and monitoring functions to be segregated between different boards. For example, one electronic board may be provided to monitor the elements of the distribution box and another to control the contactors.

[0087] The presence of a third compartment 384 allows the electronic board or boards to be separated from the other elements of the distribution box. Thus, the third compartment can operate within an acceptable thermal range and independently of the rest of the distribution box.

[0088] The third compartment 384 is separate from the first and second compartments 382 and 383. The number of compartments in the distribution housing is not a limitation of the invention. According to another embodiment, the number of compartments may be greater than three.

[0089] In the example illustrated in [Fig. 6B], the first and second inputs 331, 332, 341 and 342 of the electrical power distribution units 330 and 340 are placed on one of the first faces 371 of the distribution box 300, and the first and the second outputs 337, 339, 347 and 349 of the electrical power distribution units 330 and 340 are mounted on one of the second faces 374 of the distribution box 300.

[0090] Figures 5, 7A and 7B illustrate an electric hybridization system 500 comprising a first distribution box 301 and a second distribution box 302.

[0091] In figures 5, 7A and 7B, the elements bearing numerical references identical to those in figures 1 to 4 are identical to the corresponding elements of the embodiments in figures 1 to 4.

[0092] In the example illustrated in [Fig.5], the electrical hybridization system 500 comprises a first electric machine 100, a second electric machine 200, four AC / DC converters 130, 140, 230, 240, a first distribution box 301, a second distribution box 302, and a plurality of local loads 350, 351, 352, 353, 354, 355.

[0093] The first electric machine 100 and the second electric machine 200 can each be rotating electric machines. More specifically, the electric machines 100 and 200 can each be rotating electric machines of the PMG (Permanent Magnet Generator) type, known as permanent magnet generators. The first electric machine 100 is intended to be connected to a low-pressure shaft of an aircraft turbomachine not shown in [Fig. 5]. The second electric machine 200 is intended to be connected to a high-pressure shaft of the aircraft turbomachine not shown in [Fig. 5].

[0094] The first electric machine 100 comprises a first winding 110 and a second winding 120. The second electric machine 200 comprises a third winding 210 and a fourth winding 220. Windings 110, 120, 210, and 220 are stator windings. The number of windings in each of the machines 100 and 200 is not a limitation of the invention. According to an embodiment other than the one illustrated, each of the electric machines may comprise more than two windings.

[0095] The first winding 110 is electrically connected to a first AC / DC converter 130. The second winding 120 is electrically connected to a second AC / DC converter 140. The third winding 210 is electrically connected to a third AC / DC converter 230. The fourth winding 220 is electrically connected to a fourth AC / DC converter 240.

[0096] Each of the AC / DC converters 130, 140, 230, and 240 includes a DC preliminary filtering unit 131, 141, 231, 241, as illustrated in [Fig. 5]. The presence of a preliminary filtering unit in each of the AC / DC converters 130, 140, 230, 240 is not a limitation of the invention. According to one variant Not shown, AC / DC converters may lack a preliminary filtering unit.

[0097] According to one variant, only certain converters may include a DC preliminary filtering unit.

[0098] In the particular embodiment illustrated in [Fig.5], the first distribution box 301 includes a first filtering unit 360a and the first electrical power distribution unit 330 comprising the first high-voltage distribution busbar 335.

[0099] The first DC current filtering unit 360a is connected, for the first electrical power distribution unit 330, between the first high voltage distribution busbar 335 and the first output 337 of the first electrical power distribution unit 330, as illustrated in [Fig.5].

[0100] The second distribution box 302 includes a second filtering unit 360b and the second electrical power distribution unit 340 comprising the second high voltage distribution busbar 345.

[0101] The second DC filtering unit 360b is connected, for the second electrical power distribution unit 340, between the second high-voltage distribution busbar 345 and its first output 347 of the second electrical power distribution unit 340, as also illustrated in [Fig. 5],

[0102] The first DC filtering unit 360a and the second DC filtering unit 360b can each include several resistors, several capacitors and several coils.

[0103] The coils can be inductors or coils. An inductor is a component comprising a winding of two coils around the same magnetic core.

[0104] The position and number of resistors, capacitors and coils are not limiting to the invention.

[0105] All or part of the resistors and / or capacitors and / or coils may be connected in parallel or in series.

[0106] The first electrical power distribution unit 330 further includes a high-voltage distribution busbar 335, a first switching component 333, a second switching component 334, a third switching component 336 and several fourth switching components 338, as illustrated in [Fig. 5].

[0107] The second electrical power distribution unit 340 further comprises a high-voltage distribution busbar 345, a fifth switching component 343, a sixth switching component 344, a seventh switching component 346 and several eighth switching components 348, as illustrated in [Fig.5].

[0108] According to one embodiment, each of the switching components 333 to 338, and 343 to 348 can be a controlled switch. According to yet another embodiment, some of the switching components can be a controlled switch.

[0109] According to yet another variant, each of the switching components can be a switching element comprising two poles. The two poles can be controlled by the same actuator.

[0110] According to yet another variant, part of the switching components may be a switching element comprising two poles controlled by the same actuator.

[0111] The first switching component 333 electrically connects the first electric machine 100 to the high-voltage busbar 335 of the first electrical power distribution unit 330, via the first AC / DC converter 130. The first switching component 333 is connected between a first input 331 of the first electrical power distribution unit 330 and its high-voltage busbar 335, the first input 331 of the first electrical power distribution unit 330 being connected to the first electric machine 100 via the first AC / DC converter 130, as illustrated in [Fig. 5].

[0112] The second switching component 334 electrically connects the second electric machine 200 to the high-voltage busbar 335 of the first electrical power distribution unit 330, via the third AC / DC converter 230. The second switching component 334 is connected between a second input 332 of the first electrical power distribution unit 330 and its high-voltage busbar 335, the second input 332 of the first electrical power distribution unit 330 being connected to the second electric machine 200 via the third AC / DC converter 230, as illustrated in [Fig. 5].

[0113] The fifth switching component 343 electrically connects the first electric machine 100 to the high-voltage busbar 345 of the second electrical power distribution unit 340, via the second AC / DC converter 140. The fifth switching component 343 is connected between a first input 341 of the second electrical power distribution unit 340 and its high-voltage busbar 345, the first input 341 being connected to the first electric machine 100 via the second AC / DC converter 140, as illustrated in [Fig. 5].

[0114] The sixth switching component 344 of the second electrical power distribution unit 340 electrically connects the second electrical machine 200 to the high-voltage distribution busbar 345 of the second distribution unit of electrical power 340, and this via the fourth AC / DC converter 240. The sixth switching component 344 connects a second input 342 of the second electrical power distribution unit 340 and its high voltage bus 345, the second input 342 of the second electrical power distribution unit 340 being connected to the second electrical machine 200 via the fourth AC / DC converter 240, as illustrated in [Fig.5].

[0115] The first distribution box 301 may further include a control card 356a for monitoring parameters such as temperature, voltage or current of the first DC filtering unit 360a.

[0116] The second distribution box 302 may further include a control card 356b for monitoring parameters such as temperature, voltage or current of the second DC filtering unit 360b.

[0117] When the AC / DC converters 130, 140, 230 and 240 each include a preliminary filtering unit, the control board 356a housed in the first distribution box 301 can monitor parameters such as temperature, voltage or current of the first DC filtering unit 360a, the DC preliminary filtering unit 131 of the first AC / DC converter 130 and the DC preliminary filtering unit 231 of the third converter 230, as illustrated in [Fig.5].Similarly, the control board 356b housed in the second distribution box 302 can monitor parameters such as temperature, voltage or current of the second DC filter unit 360b, the DC preliminary filter unit 141 of the second converter 140 and the DC preliminary filter unit 241 of the fourth converter 240, as illustrated in [Fig.5]. .

[0118] The first electrical power distribution unit 330 has a first output 337 for connection to the aircraft's electrical network. And, the second electrical power distribution unit 340 has a first output 347 for connection to the aircraft's electrical network.

[0119] The third switching component 336 of the first electrical power distribution unit 330 electrically connects the first electrical power distribution unit 330 to its first output 337. The seventh switching component 346 of the second electrical power distribution unit 340 electrically connects the second electrical power distribution unit 340 to its first output 347, as illustrated in [Fig. 5].

[0120] The local loads 350 to 355 may include aircraft components other than those powered by the aircraft's electrical network. The fourth switching components 338 of the first electrical power distribution unit 330 connect the first electrical power distribution unit 330 to second outputs 339 intended to be connected to local loads 350, 351 and 352.

[0121] The eighth switching components 348 of the second electrical power distribution unit 340 connect the second electrical power distribution unit 340 to second outputs 349 intended to be connected to local loads 353, 354 and 355.

[0122] In the example illustrated in [Fig.7A], the first housing 301 is a block comprising six faces 371a to 376a. The first two faces 371a and 372a extend along an XY plane, the second two faces 373a and 374a extend along an XZ plane and the third two faces 375a and 376a extend along a YZ plane.

[0123] As illustrated in [Fig. 5], the first distribution box 301 comprises a filtering zone and a distribution zone separate from each other. The filtering zone comprises a first DC filtering unit 360a. The distribution zone comprises the first electrical distribution unit 330.

[0124] The first DC filtering unit 360a is connected between the first high-voltage distribution busbar 335 and the first output 337 of the first electrical power distribution unit 330.

[0125] The first distribution box 301 includes a first compartment 382a comprising the first filtering unit 360a, and a second compartment 383a comprising the first electrical power distribution unit 330 comprising the first high-voltage distribution busbar 335. Such a configuration makes it easier to separate the filtering area from the distribution area in the first distribution box 301.

[0126] According to one variant, the first DC filtering unit 360a can extend into the same compartment 382a as the first electrical power distribution unit 330. However, this feature is not limiting of the invention.

[0127] The first distribution box 301 further includes a third compartment 384a comprising an electronic card 400a or a plurality of electronic cards 400a.

[0128] The third compartment 384a of the first distribution box 301 is separate from the first and second compartments 382a and 383a of the first distribution box 301. The number of compartments in the first distribution box 301 is not a limitation of the invention. According to another embodiment, the number of compartments may be greater than three.

[0129] The presence of a plurality of electronic cards 400a in the first distribution box 301 allows the control and monitoring functions to be segregated between different cards. For example, one electronic card may be designated to monitor the elements of the first distribution box 301 and another to control the contactors.

[0130] The presence of a third compartment 384a of the first distribution box 301 makes it possible to separate the electronic board or electronic boards from the other elements of the first distribution box 301. Thus, the third compartment 384a of the first distribution box 301 can operate within an acceptable thermal range and independently of the rest of the first distribution box 301.

[0131] The presence of the third compartment in the first distribution box 301 is not limiting of the invention. The presence of one or more electronic boards in the first distribution box is not limiting of the invention.

[0132] In an unillustrated variant, the first distribution box 301 may be devoid of the third compartment and / or the electronic boards.

[0133] The first input 331 of the first electrical power distribution unit 330 and the second input 332 of the first electrical power distribution unit 330 can be placed on the same face of the first distribution box 301. Here, one of the first faces 371a has the first input 331 and the second input 332.

[0134] The first output 337 and the second output 339 of the first electrical power distribution unit 330 can be placed on the same face of the first distribution box 301, as illustrated in [Fig. 7A]. Here, one of the second faces 374a has the first output 337 and the second output 339.

[0135] In another variant not shown, the first input 331, the second input 332, the first output 337 and the second output 339 of the first electrical power distribution unit 330 can be placed on the same face of the first distribution box 301.

[0136] As illustrated in [Fig. 5], the second distribution box 302 comprises a filtering zone and a distribution zone separate from each other. The filtering zone comprises a second DC filtering unit 360b. The distribution zone comprises the second electrical distribution unit 340.

[0137] The second DC filtering unit 360b is connected between the second high-voltage distribution busbar 345 and the first output 347 of the second electrical power distribution unit 340.

[0138] In the example illustrated in [Fig.7B], the second distribution housing 302 is a block comprising six faces 371b to 376b. The first two faces 371b and 372b extend along an XY plane, the second two faces 373b and 374b extend along an XZ plane and the third two faces 375b and 376b extend along a YZ plane, as illustrated in [Fig.7B].

[0139] The second distribution box 302 comprises a first compartment 382b containing the second filtering unit 360b, and a second compartment 383b containing the second electrical power distribution unit 340 containing the second high-voltage distribution busbar 345. Such a configuration makes it easier to separate the filtering area from the distribution area in the second distribution box 302.

[0140] According to one variant, the second DC filtering unit 360b can extend into the same compartment 382b as the second electrical power distribution unit 340. However, this feature is not limiting of the invention.

[0141] The second distribution box 302 further includes a third compartment 384b comprising an electronic card 400b or a plurality of electronic cards 400b.

[0142] The third compartment 384b of the second distribution box 302 is separate from the first and second compartments 382b and 383b of the second distribution box 302. The number of compartments in the second distribution box 302 is not a limitation of the invention. According to another embodiment, the number of compartments may be greater than three.

[0143] The presence of the third compartment in the second distribution box is not a limitation of the invention. The presence of one or more electronic boards in the second distribution box is not a limitation of the invention.

[0144] In an unillustrated variant, the second distribution box 302 may be devoid of the third compartment and / or the electronic boards.

[0145] The presence of a plurality of electronic boards 400b in the second distribution box 302 allows the control and monitoring functions to be separated between different boards. For example, one electronic board may be used to monitor the elements of the second distribution box 302 and another to control the contactors.

[0146] The presence of a third compartment 384b of the second distribution box 302 allows the electronic board or boards to be separated from the other elements of the second distribution box 302. Thus, the third compartment 384b of the second distribution box 302 can operate within an acceptable thermal range and independently of the rest of the second distribution box 302.

[0147] The first input 341 of the second electrical power distribution unit 340 and the second input 342 of the second electrical power distribution unit 340 can be placed on the same face of the second distribution box 302, as illustrated in [Fig. 7B]. Here, one of the first faces 371b includes the first input 341 and the second input 342 of the second electrical power distribution unit 340.

[0148] The first output 347 and the second output 349 of the second electrical power distribution unit 340 can be placed on the same face of the second distribution box 302, as illustrated in [Fig. 7B]. Here, one of the second faces 374b has the first output 347 and the second output 349.

[0149] In another variant not shown, the first input 341, the second input 342, the first output 347 and the second output 349 of the second electrical power distribution unit 340 can be placed on the same face of the second distribution box 302.

Claims

Demands

1. An electrical hybridization system (500) for an aircraft, the system comprising a first reversible electric machine (100) for connection to a low-pressure shaft, a second reversible electric machine (200) for connection to a high-pressure shaft, two electrical power distribution units (330, 340), each comprising a high-voltage distribution busbar (335, 345), a first output (337, 347) for connection to the aircraft's electrical network, and at least one second output (339, 349) for connection to at least one local load, each electric machine comprising a first winding (110, 210) and a second winding (120, 220), and the system further comprising, for each electric machine (100, 200), a first AC / DC converter (130, 230) coupled between the first winding (110, 210) of the electric machine (100, 200) and one of the two electrical power distribution units (330,340), and a second AC / DC converter (140, 240) coupled between the second winding (120, 220) of the electric machine (100, 200) and the other electrical power distribution unit (340) characterized in that it further comprises a DC filtering unit (360) and a distribution box (300) in which are housed the two electrical power distribution units (330, 340) and the DC filtering unit (360), said DC filtering unit (360) being connected, for each electrical power distribution unit (330, 340), between the high-voltage distribution busbar (335, 345) and the first output (337, 347).

2. System according to claim 1, wherein the distribution box (300) comprises a first compartment (382) comprising the filtering unit (360), and a second compartment (383) comprising the electrical power distribution units (330, 340).

3. System according to claim 2, wherein the distribution box (300) further comprises a third compartment (384) having at least one electronic card (400), the third compartment (384) being distinct from the first compartment (382) and the second compartment (383).

4. System according to any one of claims 1 to 3, wherein each electrical power distribution unit (330, 340) comprises a first input (331, 341) connected to the first electrical machine (100) via one of the AC / DC converters (130, 140) coupled to the first electrical machine (100) and a second input (332, 342) connected to the second electrical machine (200) via one of the AC / DC converters (230, 240) coupled to the second electrical machine (200).

5. System according to claim 4, wherein the distribution box (300) comprises a plurality of faces (371, 372, 373, 374, 375, 376), and the first inputs (331, 341), the second inputs (332, 342), the first outputs (337, 347) and the second outputs (339, 349) of the electrical power distribution units (330, 340) are mounted on the same face of the distribution box (300).

6. System according to claim 4, wherein the distribution box (300) comprises a plurality of faces (371, 372, 373, 374, 375, 376), and the first inputs (331, 341) and the second inputs (332, 342) of the electrical power distribution units (330, 340) are mounted on a first face, while the first outputs (337, 347) and the second outputs (339, 349) of the electrical power distribution units (330, 340) are mounted on a second face of the distribution box (300) distinct from the first face of the distribution box.

7. A system according to any one of claims 1 to 6, wherein the first AC / DC converter (130, 230) and the second AC / DC converter (140, 240) each further comprise a DC preliminary filtering unit (131, 141, 231, 241), the DC preliminary filtering units (131, 141, 231, 241) being configured to filter at a first level, and the filtering unit of the distribution box (360) being configured to filter at a second level, the first and second levels of filtering each being lower than the filtering level required by the aircraft electrical network to which the system is intended to be connected, and the combination of the first and second levels of filtering being at least equal to the level of filtering required by the electrical network of the aircraft to which the system is intended to be connected.

8. An electrical hybridization system (500) for an aircraft, the system comprising a first reversible electric machine (100) for connection to a low-pressure shaft, a second reversible electric machine (200) for connection to a high-pressure shaft, two electrical power distribution units (330, 340), each comprising a high-voltage distribution busbar (335, 345), a first output (337, 347) for connection to the aircraft's electrical network, and at least one second output (339, 349) for connection to at least one local load, each electric machine comprising a first winding (110, 210) and a second winding (120, 220), and the system further comprising, for each electric machine (100, 200), a first AC / DC converter (130, 230) coupled between the first winding (110, 210) of the electric machine (100, 200) and one of the two electrical power distribution units (330,340), and a second AC / DC converter (140, 240) coupled between the second winding (120, 220) of the electric machine (100, 200) and the other electrical power distribution unit (340), characterized in that it further comprises a first DC filtering unit (360a), a second filtering unit (360b), a first distribution box (301) housing the first power distribution unit (330) and the first filtering unit (360a), and a second distribution box (302) housing the second power distribution unit (340) and the second DC filtering unit (360b), each DC filtering unit (360a, 360b) being connected to the electrical power distribution unit (330, 340) housed in the same box (301, 302) between the high-voltage distribution busbar (335, 345) and the first output (337, 347) of said electrical power distribution unit (330, 340).

9. A system according to claim 8, wherein each distribution box (301, 302) comprises a first compartment (382a, 382b) containing the filtering unit (360a, 360b) housed in said distribution box (301, 302), and a second compartment (383a, 383b) comprising the power distribution unit electrical (330, 340) housed in said distribution box (301, 302).

10. System according to claim 9, wherein each distribution box (301, 302) further comprises a third compartment (384a, 384b) comprising at least one electronic card (400a, 400b), the third compartment (384a, 384b) being distinct from the first compartment (382a, 382b) and the second compartment (383a, 383b).

11. System according to any one of claims 8 to 10, wherein each electrical power distribution unit (330, 340) comprises a first input (331, 341) connected to the first electrical machine (100) via one of the AC / DC converters (130, 140) coupled to the first electrical machine (100) and a second input (332, 342) connected to the second electrical machine (200) via one of the AC / DC converters (230, 240) coupled to the second electrical machine (200).

12. System according to claim 11 wherein each distribution box (301, 302) comprises a plurality of faces (371a, 371b, 372a, 372b, 373a, 373b, 374a, 374b, 375a, 375b, 376a, 376b), and the first inlet (331, 341), the second inlet (332, 342), the first output (337, 347) and the second output (339, 349) of the electrical power distribution units (330), 340) are mounted on the same face of each distribution box (301, 302).

13. A system according to claim 11, wherein each distribution box (301, 302) comprises a plurality of faces (371a, 371b, 372a, 372b, 373a, 373b, 374a, 374b, 375a, 375b, 376a, 376b), and the first input (331, 341) and second input (332, 342) of the electrical power distribution units (330, 340) are mounted on a first face of each distribution box (301, 302), while the first output (337, 347) and second output (339, 349) of the electrical power distribution units (330, 340) are mounted on a second face of each distribution box (301, 302) separate from the first side of each distribution box.

14. System according to any one of claims 8 to 13, wherein the first AC / DC converter (130, 230) and the second AC / DC converter (140, 240) each further comprise a DC preliminary filtering unit (131, 141, 231, 241),

15. the DC preliminary filtering units (131, 141, 231, 241) being configured to filter each at a first level, and the first DC filtering unit (360a) and the second DC filtering unit (360b) being configured to filter at a second level of filtering, the first level of filtering and the second level of filtering each being lower than the level of filtering required by the electrical network of the aircraft to which the system is intended to be connected, and the combination of the first level of filtering with the second level of filtering being at least equal to the level of filtering required by the electrical network of the aircraft to which the system is intended to be connected. Aircraft comprising an electric hybridization system according to any one of claims 1 to 14.