INTEGRATED ELECTROMAGNETIC COMPONENT, ELECTRICAL INSTALLATION COMPRISING SUCH AN INTEGRATED ELECTROMAGNETIC COMPONENT, AND MOBILITY MACHINE COMPRISING SUCH AN ELECTRICAL INSTALLATION

Abstract

The component (400) comprises: - a magnetic core (K) forming: • a first loop (402A) and a second loop (402B) having a common portion (404), • a third loop (502A) having a common portion (504A) with the first loop (402A) and / or the second loop (402B), and • a fourth loop (502B) having a common portion (504B) with the first loop (402A) and / or the second loop (402B); - at least two first windings (W1A, W2A, W3A) wound around the first loop (406A) to be magnetically coupled, outside the common portions (404, 504A, 504B); - at least two second windings (W1B, W2B, W3B) wound around the second loop (406B) to be magnetically coupled, outside the common portions (404, 504A, 504B); - a third winding (508A) wound around the third loop (502A), outside the common portions (404, 504A, 504B);and - a fourth winding (508B) wound around the fourth loop (502B), outside the common portions (404, 504A, 504B). Figure for the abstract: Fig. 5;

Description

Title of the invention: INTEGRATED ELECTROMAGNETIC COMPONENT, ELECTRICAL INSTALLATION COMPRISING SUCH AN INTEGRATED ELECTROMAGNETIC COMPONENT, AND MOBILITY MACHINE COMPRISING SUCH AN ELECTRICAL INSTALLATION Technical field of the invention

[0001] The present invention relates to an integrated electromagnetic component, an electrical installation comprising such an integrated electromagnetic component, and a mobility device comprising such an electrical installation.

[0002] A mobility device is, for example, a motorized land vehicle, a train, an aircraft or a drone. A motorized land vehicle is, for example, a motor vehicle, a motorcycle, a motorized bicycle or a motorized wheelchair.

[0003] In the description and claims which follow, a switch is a component comprising at least one controllable semiconductor switch, such as a transistor,such as a metal-oxide gate field effect transistor (also known as MOSFET) or a silicon metal-oxide gate field effect transistor (also known as Si MOSFET) or a silicon carbide metal-oxide gate field effect transistor (also known as SiC MOSFET) or an insulated gate bipolar transistor (also known as IGBT) or a gallium nitride field effect transistor (also known as GaN FET). Technological background

[0004] The patent application published under number CN 101404454 A describes an integrated electromagnetic component implementing two transformers.

[0005] The patent application published under number CN 108109821 A describes an integrated electromagnetic component implementing a transformer and an inductance.

[0006] For the sake of even greater integration, it may thus be desirable to provide an integrated electromagnetic component implementing two transformers and two inductors. Summary of the invention

[0007] An integrated electromagnetic component is therefore proposed, characterized in that it comprises: - a magnetic core forming: • a first loop and a second loop having a common portion, • a third loop having a portion in common with the first loop and / or the second loop, and • a fourth loop having a portion in common with the first loop and / or the second loop; - at least two first windings wound around the first loop to be magnetically coupled, outside the common portions; - at least two second windings wound around the second loop to be magnetically coupled, outside the common portions; - a third winding wound around the third loop, outside the common portions; and - a fourth winding wrapped around the fourth loop, outside the common portions.

[0008] Thus, thanks to the invention, it is possible to integrate two transformers and two inductors with a single magnetic core. This makes it possible to improve compactness to obtain greater power density, while reducing costs.

[0009] The invention may further comprise one or more of the following optional features, in any technically possible combination.

[0010] Optionally, the third and fourth loops have a common portion, the windings being located outside this common portion.

[0011] Also optionally, the magnetic core comprises: - a central branch; - first and second lateral branches; and - three transverse branches extending from one of the lateral branches to the other, crossing the central branch.

[0012] Also optionally, the first windings are wound around the first side branch and the second windings are wound around the second side branch.

[0013] Also optionally, one or more of the branches are straight.

[0014] Also optionally, one or more of the branches have a section rectangular.

[0015] Also optionally, one or more of the loops have an air gap, single or distributed.

[0016] Also optionally, the air gap(s) are located outside the central branch.

[0017] Also optionally, the third winding is made with the same wire as one of the first windings and / or the fourth winding is made with the same wire as one of the second windings.

[0018] Also optionally, at least one of the first windings is made by a foil or a bus bar and / or at least one of the second windings is made by a foil or a bus bar.

[0019] An electrical installation for a mobility device is also proposed, comprising: - a charging socket intended to receive an alternating voltage; - first and second high voltage batteries; - first and second low voltage networks; and - an electrical distribution system interconnecting the charging socket, the high voltage batteries and the low voltage networks, comprising: • an entry capacity, • an AC-DC converter between the charging socket and the input capacitor; • a first transformer, • a first so-called charging converter, DC-DC, bidirectional and isolated, between the input capacity and the first high-voltage battery, comprising: ~ a primary winding and a secondary winding of the first transformer coupled to each other, ~ a first inductance in series with one of the primary winding and the secondary winding of the first transformer, ~ a converter between the input capacity and the primary winding of the first transformer and, where appropriate, the first inductance, and ~ a converter between, on the one hand, the secondary winding of the first transformer and, where appropriate, the first inductance and, on the other hand, the first high-voltage battery, • a first so-called power supply converter, DC-DC, bidirectional and isolated, between the first high-voltage battery and the first low-voltage network, comprising: ~ a tertiary winding of the first transformer coupled to the secondary winding of the first transformer, ~ the converter between, on the one hand, the secondary winding of the first transformer and, where appropriate, the first inductance and, on the other hand, the first high-voltage battery, and ~ a converter between, on the one hand, the tertiary winding of the first transformer, on the other hand, the first low voltage network, • a second transformer, • a second, so-called charging converter, DC-DC, bidirectional and isolated, between the input capacity and the second high-voltage battery, comprising: ~ a primary winding and a secondary winding of the second transformer coupled to each other, ~ a second inductance in series with one of the primary winding and the secondary winding of the second transformer, ~ a converter between the input capacity and the primary winding of the second transformer and, where appropriate, the second inductance, and ~ a converter between, on the one hand, the secondary winding of the second transformer and, where appropriate, the second inductance and, on the other hand, the second high-voltage battery, • a second so-called power supply converter, DC-DC, bidirectional and isolated, between the second high-voltage battery and the second low-voltage network, comprising: ~ a tertiary winding of the second transformer coupled to the secondary winding of the second transformer, ~ the converter between, on the one hand, the secondary winding of the second transformer and, where appropriate, the second inductance and, on the other hand, the second high-voltage battery, and ~ a converter between, on the one hand, the tertiary winding of the second transformer and, on the other hand, the second low-voltage network, • an electromagnetic component according to the invention, implementing transformers and inductances.

[0020] A mobility device comprising an electrical installation according to the invention is also proposed. Brief description of the figures

[0021] The invention will be better understood with the aid of the following description, given solely by way of example and with reference to the appended drawings in which: - [Fig.l] is a schematic view of a mobility device in which the invention is implemented, - [Fig.2] is an electrical diagram of an electrical distribution system present in the mobility device of [Fig.l], - Fig. 3 shows the electrical diagram of [Fig.2] indicating the transfers of electrical energy in the event of a high-voltage battery failure, - [Fig.4] is a front view of an integrated electromagnetic component of the distribution system of [Fig.2], on which elements implementing two transformers are indicated, - [Fig.5] repeats [Fig.4] by indicating elements implementing two inductances, - [Fig.6] repeats [Fig.4] by indicating elements of a core of the integrated electromagnetic component, - [Fig.7] repeats [Fig.4] indicating other elements of the core of the integrated electromagnetic component, - [Fig.8] is an electrical diagram of a variant of the electrical distribution system, - [Fig.9] is a front view of an integrated electromagnetic component of the distribution system of [Fig.8], - Fig. 10 is a front view of a variant of the integrated electromagnetic component, and - [Fig.l 1] is an electrical diagram of another variant of electrical distribution system. Detailed description of the invention

[0022] With reference to [Fig.l], a mobility device 100 in which the invention is implemented will now be described. The mobility device 100 is for example a motor vehicle.

[0023] The mobility device 100 comprises a propulsion system 102, for example drive wheels in the case of a motor vehicle.

[0024] The mobility device 100 further comprises an electric motor 104 for driving the propulsion system 102.

[0025] The mobility device 100 further comprises low-voltage equipment, designated by the general reference 106.

[0026] The mobility device 100 further comprises an electrical installation 108.

[0027] The electrical installation 108 comprises two high-voltage batteries 110A, 110B, for example connected to each other by a switch 112, for example a controllable switch (for example a semiconductor switch) or a fuse. A high voltage is a direct voltage for example greater than 100 V, preferably greater than 300 V.

[0028] The electrical installation 108 further comprises a charging socket 114 designed to be connected to a charging terminal (not shown) external to the mobility device 100.

[0029] The mobility device 100 further comprises two low voltage networks 116A, 116B. A low voltage is a direct voltage, for example less than 100 V. Each of the electrical equipment 106 is connected to one or both of the low voltage networks 116A, 116B in order to be supplied redundantly.

[0030] The mobility device 100 further comprises an electrical distribution system 118 interconnecting the charging socket 114, the high voltage batteries 110A, 110B and the low voltage networks 116A, 116B.

[0031] With reference to [Fig.2], the electrical distribution system 118 will now be described in more detail.

[0032] The electrical distribution system 118 comprises an input capacitor C and an AC-DC converter 202 between the load socket 114 and the input capacitor C. The AC-DC converter 202 is in particular designed to charge the input capacitor C so that the latter has a continuous input voltage U.

[0033] The electrical distribution system 118 further comprises a first transformer 204A comprising a magnetic core KA and windings which will be described in more detail later.

[0034] Charging the first high voltage battery 110 A

[0035] To charge the first high-voltage battery 110A, the electrical distribution system 118 comprises a first so-called charging converter 206A, DC-DC, between the input capacity C and the first high-voltage battery 110A. The first charging converter 206A passes through the first transformer 204A and is thus isolated. It is also preferably bidirectional, as in the example illustrated.

[0036] More precisely, the first charge converter 206A comprises two windings W1A, W2A of the first transformer 204A, coupled to each other by the magnetic core KA, and called respectively primary and secondary.

[0037] The first charge converter 206A further comprises an inductor LA in series with one of the primary winding W1A and the secondary winding W2A.

[0038] The first charging converter 206A further comprises a converter 208A between the input capacitor C and the primary winding W1A and, if applicable, the inductance LA. The converter 208A is a bidirectional AC-DC converter. For charging the first battery 110A, it is used as a DC to AC converter from the input capacitor C to the primary winding W1A. Preferably, the converter 208A comprises an active full bridge, i.e. comprising four switches.

[0039] The first charging converter 206A further comprises a converter 210A connected between, on the one hand, the second winding W2A and, where appropriate, the first inductance LA and, on the other hand, the first high-voltage battery 110A. The converter 210A is a bidirectional AC-DC converter. For charging of the first 110A battery, it is used as an AC to DC converter from the secondary winding W2A to the first high voltage 110A battery. Preferably, the 210A converter comprises an active full bridge, i.e. comprising four switches.

[0040] Power supply of the first low voltage network 116 A

[0041] To power the first low-voltage network 116A from the first high-voltage battery 110A, the electrical distribution system 118 comprises a first so-called power converter 212A, DC-DC, between the first high-voltage battery 110A and the low-voltage DC network 116A. The power converter 212A passes through the first transformer 204A and is thus isolated. It is also preferably bidirectional, as in the example illustrated.

[0042] More specifically, the first power converter 212A comprises a winding W3A of the first transformer 204A, called the tertiary winding, coupled to the secondary winding W2A by the magnetic core KA.

[0043] The first power converter 212A further comprises the converter 210A, this time used as a DC to AC converter from the first battery 110A to the secondary winding W2A.

[0044] The first power converter 212A further comprises a converter 214A between the tertiary winding W3A and the low voltage network 116A. The converter 214A is a bidirectional AC-DC converter. For the power supply of the first low voltage network 116A, it is used as an AC to DC converter from the tertiary winding W3A to the first low voltage network. Preferably, the converter 214A comprises an active full bridge, i.e. comprising four switches.

[0045] Converters similar to those described above are provided for charging the second high-voltage battery 110B and supplying power to the second low-voltage network 116B. They are designated, as are their components, by the letter B instead of the letter A.

[0046] With reference to [Fig. 3], preferably, the power supply system 118 is robust in the event of failure of one of the high voltage batteries 110A, 110B, for supplying the low voltage networks 116A, 116B.

[0047] For example, in the case of a failure of the second high-voltage battery 110B, the first converter 206A is used from the first high-voltage battery 110A to the input capacitor C. Thus, the second converter 206B can be used as previously from the input capacitor C to the second low-voltage network 116B to power the latter. At the same time, the first high-voltage battery 110A powers the first low-voltage network 116A via the converter 212A.

[0048] A similar operation is implemented in the event of failure of the first high voltage battery 110A, to supply the first low voltage network 116A from the second high voltage battery 110B.

[0049] With reference to Figures 4 to 7, the system 118 comprises an integrated electromagnetic component 400 implementing the first and second transformers 204A, 204B, as well as the first and second inductors LA, LB.

[0050] With reference to [Fig.4], to implement the first and second transformers 204A, 204B in a compact manner, the integrated electromagnetic component 400 comprises a single magnetic core K forming the magnetic cores KA, KB, as well as the windings W1A, W2A, W3A, W1A, W2A, W3A.

[0051] The magnetic core has a high permeability, for example greater than 500, preferably greater than 800, and is for example made of ferrite and / or a nanocrystalline.

[0052] More specifically, the magnetic core K forms first and second loops 402A, 402B having a common portion 404.

[0053] A loop of the magnetic core K corresponds for example to a portion of the magnetic core K looping back on itself, this portion having zero, one air gap or several air gaps (these air gaps sometimes being called "distributed air gap"). Such a portion of the magnetic core is designed to concentrate the magnetic field lines, for example so as to concentrate at least 95% of the magnetic field lines. The field lines thus concentrated are in a closed loop, that is to say that these concentrated field lines loop back on themselves. An air gap is for example formed by a cut in the portion of the magnetic core K along the loop. This cut defines an intermediate space delimited for example on one side by a section of the portion of the magnetic core K and on the other side by another part of the portion of the magnetic core K (for example another section or a lateral face of the portion of the magnetic core K).The section thus extends opposite the other part of the portion of the magnetic core K. The air gap(s) have, for example, a length of between 0.5 mm and 15 mm, preferably 10 mm maximum.

[0054] The primary windings W1A, secondary W2A and tertiary W3A of the first transformer 204A are wound around the first loop 402A, outside the common portion 404. Similarly, the primary windings W1B, secondary W2B and tertiary W3B of the second transformer 204A are wound around the second loop 402B, outside the common portion 404.

[0055] Preferably, the windings W1A, W2A, W3A, on the one hand, and the windings WIB, W2B, W3B, on the other hand, are wound in directions such that the two magnetic fluxes generated by the windings W1A, W2A, W3A, on the one hand, and the windings W1B, W2B, W3B, on the other hand, are in opposite directions in the portion common 404. Thus, the latter has a low flux density allowing this common portion 404 to have a small section, particularly compared to the case where there would be no common section.

[0056] For example, if the windings W1A, W2A, W3A, W1B, W2B, W3B are connected so as to receive voltages of the same phase, the windings W1A, W2A, W3A are all wound in the same first direction, while the windings W1B, W2B, W3B are all wound in the same second direction, opposite to the first direction.

[0057] Still for example, if the windings W1A, W2A, W3A, on the one hand, and the windings W1B, W2B, W3B, on the other hand, are connected so as to receive opposite phase voltages, all the windings W1A, W2A, W3A, W1B, W2B, W3B are for example wound in the same direction.

[0058] Each of the first and second loops 402A, 402B may have an air gap 406A, 406B, preferably outside the common portion 404. In the example illustrated, each air gap 406A, 406B extends between two sections SIA, S2A, respectively S1B, S2B, of the portion of the magnetic core K forming the loop 402A, 402B considered, these two sections SIA, S2A, respectively S1B, S2B facing each other.

[0059] The windings W1A, W2A, WIB, W2B are preferably made of magnetic wire or Litz wire. One of the windings W1A and W2A is for example wound around the other. Similarly, one of the windings W1B and W2B is for example wound around the other.

[0060] The winding W3A is for example made of a sheet or a bus bar, for example of copper, rotating around the winding W1A and / or W2A. Similarly, the winding W3B is for example made of a sheet or a bus bar, for example of copper, rotating around the winding W1B and / or W2B. Preferably, each sheet or bus bar has a thickness close to the skin depth.

[0061] With reference to [Fig.5], to implement the first and second inductances LA, LB in a compact manner, the magnetic core K further forms third and fourth loops 502A, 502B each having a common portion 504A, 504B with the first loop 402A and / or the second loop 402B.

[0062] Preferably, as in the example illustrated in [Fig.5], the third and fourth loops 502A, 502B further have a common portion 506.

[0063] The integrated electromagnetic component 118 then comprises, to form the first inductance LA, a winding 508A around the third loop 502A. Similarly, to form the second inductance LB, the component integrated electromagnetic 118 further comprises a winding 508B around the fourth loop 502B. The windings 508A, 508B and the windings W1A, W2A, W3A, W1B, W2B, W3B are located outside the common portions 404 (visible in [Fig.4]), 504, 504B, 506. Thus, each winding 508A, 508B is magnetically decoupled from the other, as well as from the windings W1A, W2A, W3A, W1B, W2B, W3B.

[0064] Each of the third and fourth loops 502A, 502B may have an air gap 510A, 510B, preferably outside the common portions 404 (visible in [Fig.4]), 504, 504B, 506. In the example illustrated, each air gap 510A, 510B extends between a section SA and a lateral face FA (respectively SB and FB) of the portion of the magnetic core K forming the loop 502A, 502B considered, the section SA (respectively SB) facing the lateral face FA (respectively FB).

[0065] Preferably, winding 508A is made with the same wire as winding W1A (when inductance LA is in series with winding W1A) or as winding W2A (when inductance LA is in series with winding W2A). Similarly, winding 508B is made with the same wire as winding W1B (when inductance LB is in series with winding W1B) or as winding W2B (when inductance LB is in series with winding W2B).

[0066] With reference to [Fig.6], to produce the four loops 402A, 402B, 406A, 406B, the magnetic core K comprises for example a central branch 602, two lateral branches 604A, 604B.

[0067] Preferably, the air gaps 406A, 406B, 510A, 510B are located outside the central branch 602, for example on the lateral branches 604A, 604B.

[0068] With reference to [Fig.7], the magnetic core K further comprises three transverse branches 702, 704, 706 extending from one of the lateral branches 604A, 604B to the other, crossing the central branch 602.

[0069] Preferably, one or more of the branches 602, 604A, 604B, 606, 608, 610, for example all as in the illustrated example, are straight.

[0070] As illustrated, the air gap(s) of each loop have a total length of at most 50% of the distance between the two transverse branches included in this loop. Thus, the air gap 510A of the loop 502A has a length of at most 50% of the distance between the transverse branches 702, 704. Similarly, the air gap 510B of the loop 502B has a length of at most 50% of the distance between the transverse branches 702, 704. Similarly, the air gap 406A of the loop 402A has a length of at most 50% of the distance between the transverse branches 704, 706. Similarly, the air gap 406B of the loop 402B has a length of at most 50% of the distance between the transverse branches 704, 706.

[0071] The windings W1A, W2A, W3A are for example wound around the first lateral branch 604A. Similarly, the windings W1B, W2B, W3B are for example wound around the second lateral branch 604B.

[0072] With reference to [Fig.8], the electrical distribution system 118 may comprise, in addition to the first low voltage network 116A, at least one other first low voltage network 116A' and, in addition to the second low voltage network 116B, at least one other second low voltage network 116B'.

[0073] In this case, the electrical distribution system 118 comprises, for this other low voltage network 116A', 116B', another third winding W3 A', W3B' and another converter 214A', 214B', as for the low voltage networks 116A, 116B.

[0074] With reference to [Fig.9], the windings W3A', W3B' are for example similar to the windings W3A, W3B.

[0075] With reference to [Fig. 10], instead of being unique as in the previous figures, each air gap can be distributed in order to reduce fringing effect losses.

[0076] With reference to [Fig. 11], the case of inductance LA in series with winding W2A and inductance LB in series with winding W2B is illustrated.

[0077] In conclusion, it appears clearly that an integrated electromagnetic component such as that described previously makes it possible to implement two transformers and two inductors with a single magnetic core.

[0078] It will also be noted that the invention is not limited to the embodiments described above. It will indeed appear to those skilled in the art that various modifications can be made to the embodiments described above, in light of the teaching which has just been disclosed to them.

[0079] In the detailed presentation of the invention which is made above, the terms used must not be interpreted as limiting the invention to the embodiments set out in the present description, but must be interpreted to include all equivalents whose prediction is within the reach of those skilled in the art by applying their general knowledge to the implementation of the teaching which has just been disclosed to them.

Claims

Claims

1. Integrated electromagnetic component (400), characterized in that it comprises: - a magnetic core (K) forming: ~ a first loop (402A) and a second loop (402B) having a common portion (404), ~ a third loop (502A) having a common portion (504A) with the first loop (402A) and / or the second loop (402B), and ~ a fourth loop (502B) having a common portion (504B) with the first loop (402A) and / or the second loop (402B); - at least two first windings (W1A, W2A, W3A) wound around the first loop (406A) to be magnetically coupled, outside the common portions (404, 504A, 504B); - at least two second windings (W1B, W2B, W3B) wound around the second loop (406B) to be magnetically coupled, outside the common portions (404, 504A, 504B); - a third winding (508A) wound around the third loop (502A), outside the common portions (404, 504A, 504B);and - a fourth winding (508B) wound around the fourth loop (502B), outside the common portions (404, 504A, 504B).;

2. Integrated electromagnetic component (400) according to claim 1, wherein the third and fourth loops (502A, 502B) have a common portion (506), the windings (W1A, W2A, W3A, W1B, W2B, W3B, 508A, 508B) being located outside this common portion (506).

3. Integrated electromagnetic component (400) according to claim 1 or 2, wherein the magnetic core (K) comprises: - a central branch (602); - first and second lateral branches (604A, 604B); and - three transverse branches (702, 704, 706) extending from one of the lateral branches (604A, 604B) to the other by crossing the central branch (602).

4. The integrated electromagnetic component (400) of claim 3, wherein the first windings (W1A, W2A, W3A) are wound around the first side branch (604A) and the second windings (W1B, W2B, W3B) are wound around the second side branch (604A).

5. An integrated electromagnetic component (400) according to claim 3 or 4, wherein one or more of the branches (602, 604A, 604B, 702, 704, 706) are straight.

6. An integrated electromagnetic component (400) according to any one of claims 3 to 5, wherein one or more of the branches (602, 604A, 604B, 702, 704, 706) have a rectangular section.

7. An integrated electromagnetic component (400) according to any one of claims 1 to 6, wherein one or more of the loops have a single or distributed air gap (406A, 406B, 510A, 510B).

8. An integrated electromagnetic component (400) according to any one of claims 3 to 5 and claim 7, wherein the air gap(s) (406A, 406B, 510A, 510B) are located outside the central branch (602).

9. Integrated electromagnetic component (400) according to any one of claims 1 to 8, wherein the third winding (508A) is made with the same wire as one of the first windings (W1 A, W2A) and / or the fourth winding (508B) is made with the same wire as one of the second windings (WIB, W2B).

10. An integrated electromagnetic component (400) according to any one of claims 1 to 9, wherein at least one (W3A) of the first windings is made by a foil or a bus bar and / or at least one (W3B) of the second windings is made by a foil or a bus bar.

11. Electrical installation (108) for a mobility device (100), comprising: - a charging socket (114) intended to receive an alternating voltage; - first and second high-voltage batteries (110A, 110B); - first and second low-voltage networks (116A, 116B); and - an electrical distribution system (118) interconnecting the charging socket (114), the high-voltage batteries (110A, 110B) and the low-voltage networks (116A, 116B), comprising: a) an input capacitor (C), b) an AC-DC converter (202) between the charging socket (114) and the input capacitor (C), (c) a first transformer (204A), d) a first so-called charging converter (206A), DC-DC, bidirectional and isolated, between the input capacity (C) and the first high-voltage battery (110A), comprising: ~ a primary winding (W1A) and a secondary winding (W2A) of the first transformer (204A) coupled to each other, ~ a first inductance (LA) in series with one of the primary winding (W1A) and the secondary winding (W2A) of the first transformer (204A), ~ a converter (208A) between the input capacity (C) and the primary winding (W1 A) of the first transformer (204A) and, where appropriate, the first inductance (LA), and ~ a converter (210A) between, on the one hand, the secondary winding (W2A) of the first transformer (204A) and, where appropriate, the first inductance (LA) and, on the other hand, the first high voltage battery (110A), e) a first so-called power supply converter (212A), DC-DC, bidirectional and isolated, between the first high-voltage battery (110A) and the first low-voltage network (116A), comprising: ~ a tertiary winding (W3A) of the first transformer (204A) coupled to the secondary winding (W2A) of the first transformer (204A), ~ the converter (210A) between, on the one hand, the secondary winding (W2A) of the first transformer (204A) and, where appropriate, the first inductance (LA) and, on the other hand, the first high-voltage battery (110A), and ~ a converter (214A) between, on the one hand, the tertiary winding (W3A) of the first transformer (204A), on the other hand, the first low-voltage network (116A), f) a second transformer (204B), g) a second so-called charging converter (206B), DC-DC, bidirectional and isolated, between the input capacity (C) and the second high-voltage battery (110B), comprising: ~ a primary winding (W1B) and a secondary winding (W2B) of the second transformer (204B) coupled to each other, ~ a second inductance (LB) in series with one of the primary winding (WIB) and the secondary winding (W2B) of the second transformer (204B), ~ a converter (208B) between the input capacity (C) and the primary winding (WIB) of the second transformer (204B) and, where appropriate, the second inductance (LB), and ~ a converter (210B) between, on the one hand, the secondary winding (W2B) of the

12. second transformer (204B) and, where appropriate, the second inductor (LB) and, on the other hand, the second high-voltage battery (110B), h) a second so-called power supply converter (212B), DC-DC, bidirectional and isolated, between the second high-voltage battery (110B) and the second low-voltage network (116B), comprising: ~ a tertiary winding (W3B) of the second transformer (204B) coupled to the secondary winding (W2B) of the second transformer (204B), ~ the converter (210B) between, on the one hand, the secondary winding (W2B) of the second transformer (204B) and, where appropriate, the second inductance (LB) and, on the other hand, the second high-voltage battery (110B), and ~ a converter (214B) between, on the one hand, the tertiary winding (W3B) of the second transformer (204B) and, on the other hand, the second low-voltage network (116B), and i) an electromagnetic component (400) according to any one of claims 1 to 10, integrating the transformers (204A, 204B) and the inductances (LA, LB). Mobility device (100) comprising an electrical installation (108) according to claim IL

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