Abstract: The invention concerns an electrical system (1) of an electric vehicle or a hybrid electric vehicle, configured to charge and discharge a first battery (34) and a second battery (44) of the vehicle; the first battery (34) having a higher rated voltage than the second battery (44); the electrical system (1) comprising: a multi-phase transformer (20) comprising primary windings (P1, P2, P3), first secondary windings (S1, S2, S3) and tertiary windings (T1a-T1b, T2a-T2b, T3a-T3b or T1, T2, T3); a LLC primary circuit (12) comprising a first multi-phase H-bridge (B1) to control the primary windings (P1, P2, P3); the LLC primary circuit (12) being connected to the PFC converter; a HVDC part (30) to allow energy exchange with the first battery (34); the HVDC part (30) comprising a second multi-phase H-bridge (B2); a LVDC part (40) to allow energy exchange with the second battery (44); the LVDC part (40) comprising a rectifier (41) configured to control the tertiary windings of the transformer (20).

Abstract: The invention concerns a transformer (20) comprising a magnetic core (5), the magnetic core (5) comprising plural limbs (51, 52, 53) around each of which is wound a primary winding (P1, P2, P3), a first secondary winding (S1, S2, S3) and a tertiary winding (T1a-T1b, T2a-T2b, T3a-T3b or T1, T2, T3); the transformer (20) comprising said windings; the magnetic core (5) comprising a first half core (5a) and a second half core (5b) respectively comprising sub-limbs (51a, 52a, 53a, 51b, 52b, 53b) of the limbs (51, 52, 53); the transformer (20) being characterized in that: the air gaps (61) are respectively located either close to the first half core (5a), or close to the second half core (5b); some of the windings of the transformer (20) are Litz wires, and some of the windings are flat conductors.

Abstract: A voltage converter includes a voltage conversion circuit having an inverter including at least one switching arm having a high-side switch and a low-side switch, a resonant tank, a rectifier and an output capacitor. A device for controlling the switches is designed to alternate a phase in which the control device opens the first of the switches and closes a second, and a phase in which the control device opens the second of the switches and closes the first, the control device being designed to provide a dead time between two consecutive phases. The voltage converter further includes a device for measuring an electrical signal of the voltage conversion circuit and the control device is designed to determine, from the measured electrical signal, a crossing instant of the resonance current and the auxiliary current and to calculate a duration of the dead time from the crossing instant.

Abstract: The invention relates to a power electrical apparatus comprising a first electrical module (21) forming a power electronic module, a second electrical module (22) forming a power electronic module, a third electrical module (4) forming a capacitive module which comprises a plurality of electrical components and a housing, a cooling system, configured to cool said second electrical module (22), a connecting portion of the cooling circuit connecting a first (31) and a second (32) cooling module, said connecting portion providing a fluidic connection between said first (31) and said second (32) cooling module, said first and second cooling modules (31-32) being positioned on either side of said third electrical module (4), said first and second cooling modules (31-32) each having a portion extending beyond one and the same lateral face of said third electrical module (4), vertically in line therewith, said portions facing one another.

Abstract: The invention relates to an electrical assembly, in particular for a vehicle, comprising a casing (13), at least one electrical module (11) having at least one electrical component to be cooled, a cooling module (12) comprising at least two fluid orifices (122), at least one cooling duct provided in said cooling module (12), configured to form a portion of a cooling circuit and to provide a fluidic connection between said fluid orifices (122), said at least one electrical module (11) being connected to said cooling module (12) in order for the electrical module (11) to be cooled, said casing (13) being connected to said cooling module (12) so as to define a free volume, said free volume accommodating said at least one electrical module (11) so as to form an independent module configured to be connected to a frame of an item of electrical equipment.

Abstract: A power electronics module having at least one electronic chip, and an electrically insulating overmolded block at least partially encapsulating each of the at least one chip. The module includes at least one projection against which a component can bear, such as an electronic circuit board for controlling each chip. The projection includes an electrically insulating material and extending from one face of the block.

Abstract: A magnetic component includes two ferromagnetic half-cores stacked and superposed to form a ferromagnetic core comprising three legs, namely two first legs and one second leg. Each leg is formed from two facing half-legs separated by a gap, and each leg incudes a primary winding and a secondary winding having a winding direction, on each of the half-legs forming the leg, respectively. The magnetic component is characterized in that, on the second leg, the primary winding and the secondary winding and their winding directions are inverted with respect to those of the first legs.

Abstract: An active voltage snubber includes a ground terminal and an input terminal, and a snubber capacitor. A snubbing-activation device is designed to connect the input terminal to a second terminal of the snubber capacitor with a view to charging the snubber capacitor via this second terminal. Also included is a discharging switch for discharging the snubber capacitor, and a control circuit for controlling the discharging switch, which is designed to close the discharging switch so as to make the snubber capacitor discharge via its second terminal through the discharging switch. The control circuit is powered electrically by the snubber capacitor by being connected to the second terminal of the snubber capacitor so as to receive current from the snubber capacitor.