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 present invention relates to an electrical system comprising at least one magnetic cell connected to an external grid system and comprising a filtering cell having a capacitor X (CDM1, CDM2, CDM3) and a capacitor Y (CY). Said electrical system comprises an array of switches, connected up-circuit of the capacitors X (CDM1, CDM2, CDM3) and Y (CY) of said filtering cell, said array of switches being configured such that: in a single-phase operating mode, the series-connected switches (S2, S3) on the unpowered phases (B, C) are open, and the switches (S1, S4) connected between the first phase (A) and the other phases (B, C) are closed; in a multi-phase operating mode, the series-connected switches (S2, S3) are closed and the switches (S1, S4) connected between the first phase (A) and the other phases (B, C) are open.

Abstract: The invention relates to a DC/DC voltage converter comprising an isolated circuit including inductors coupled to one another by a first magnetic circuit that is independent of a second magnetic circuit coupling inductors to one another, and wherein: —a first side of the electrically isolating barrier includes an electrical branch comprising an inductor that is coupled to the first magnetic circuit and is electrically connected in series with an inductor that is coupled to the second magnetic circuit; and —a second side of the electrically isolating barrier includes a first inductor that is coupled to the first magnetic circuit and a second inductor that is coupled to the second magnetic circuit; the second side of the electrically isolating barrier further comprising a third inductor and a fourth inductor, said third and fourth inductors of the second side being coupled by a respective magnetic circuit to at least one respective inductor that is located on the first side of the isolating barrier.

Abstract: The present invention pertains to an electrical system, in particular designed to be installed on board an electric or hybrid vehicle, whereby said electrical system includes an AC-to-DC converter that includes a rectifier and a DC-to-DC converter, an isolated DC-to-DC converter connected to a high voltage battery, and whereby said electrical system is configured, in a first operating mode, to be connected to an external alternating electricity grid to charge the high voltage battery. Furthermore, the first interface terminals of the DC-to-DC converter are connected to a low voltage battery, whereby said electrical system is configured so that, in a second operating mode, when the electrical system is disconnected from the external alternating electricity grid, said DC-to-DC converter supplies an initial voltage from the high voltage battery to power the low voltage battery.

Abstract: The invention relates to a DC/DC voltage converter comprising an isolated circuit including inductors coupled to one another by a first magnetic circuit that is independent of a second magnetic circuit coupling inductors to one another, and wherein: —a first side of the electrically isolating barrier includes an electrical branch comprising an inductor that is coupled to the first magnetic circuit and is electrically connected in series with an inductor that is coupled to the second magnetic circuit; and —a second side of the electrically isolating barrier includes a first inductor that is coupled to the first magnetic circuit and a second inductor that is coupled to the second magnetic circuit; the second side of the electrically isolating barrier further comprising a third inductor and a fourth inductor, said third and fourth inductors of the second side being coupled by a respective magnetic circuit to at least one respective inductor that is located on the first side of the isolating barrier.

Abstract: The invention relates to a method for measuring the temperature of at least one electronic component (2) using a sensor (4) that supplies a temperature-dependent voltage. The method comprises the following steps in which: a signal representative of the voltage delivered by the sensor (4) is made to pass through an isolated differential amplifier (13), and the signal output from said isolated differential amplifier (13) is used to determine the temperature measured by the sensor (4).

Abstract: The invention relates to a voltage converter comprising: an isolated DC/DC converter circuit having at least one first isolation transformer and switches whose opening and closing successions with at least one duty ratio make it possible to transmit energy through the isolated DC/DC converter by way of said first transformer; a circuit for regulating the input voltage of the isolated DC/DC converter circuit; the regulating circuit being configured to control the output voltage of the isolated DC/DC converter circuit by modifying the voltage delivered to the isolated DC/DC converter circuit, the duty ratio of the isolated DC/DC converter circuit remaining constant, and in said converter, the output of the regulating circuit is connected to a branch of the isolated DC/DC converter circuit comprising said first transformer.

Abstract: The present invention pertains to an electrical system, in particular designed to be installed on board an electric or hybrid vehicle, whereby said electrical system includes an AC-to-DC converter that includes a rectifier and a DC-to-DC converter, an isolated DC-to-DC converter connected to a high voltage battery, and whereby said electrical system is configured, in a first operating mode, to be connected to an external alternating electricity grid to charge the high voltage battery. Furthermore, the first interface terminals of the DC-to-DC converter are connected to a low voltage battery, whereby said electrical system is configured so that, in a second operating mode, when the electrical system is disconnected from the external alternating electricity grid, said DC-to-DC converter supplies an initial voltage from the high voltage battery to power the low voltage battery.

Abstract: The invention relates to a voltage converter comprising: an isolated DC/DC converter circuit having at least one first isolation transformer and switches whose opening and closing successions with at least one duty ratio make it possible to transmit energy through the isolated DC/DC converter by way of said first transformer; a circuit for regulating the input voltage of the isolated DC/DC converter circuit; the regulating circuit being configured to control the output voltage of the isolated DC/DC converter circuit by modifying the voltage delivered to the isolated DC/DC converter circuit, the duty ratio of the isolated DC/DC converter circuit remaining constant, and in said converter, the output of the regulating circuit is connected to a branch of the isolated DC/DC converter circuit comprising said first transformer.

Abstract: The invention relates to a method for measuring the temperature of at least one electronic component (2) using a sensor (4) that supplies a temperature-dependent voltage. The method comprises the following steps in which: a signal representative of the voltage delivered by the sensor (4) is made to pass through an isolated differential amplifier (13), and the signal output from said isolated differential amplifier (13) is used to determine the temperature measured by the sensor (4).

Abstract: The invention relates to a method for producing a thermally conductive and electrically insulating link between at least one electronic component (2) and a completely or partially metal radiator (5), in which the electronic component (2) and the radiator (5) form part of an assembly (1) also comprising a printed circuit (4) disposed between the electronic component (2) and the radiator (5), said printed circuit (4) comprising at least one metal layer (8, 9) and a metal insert (13). According to the method, at least one metal surface (11, 12, 15, 16, 17) is anodised and the heat from the electronic component (2) is dissipated through said surface to the radiator (5), said metal surface belonging to one of the following: the electronic component (2), the printed circuit (4) or the radiator (5).

Abstract: The present invention relates to a voltage step-up circuit (100). One particularly advantageous application of the invention is in the field of 12 V/42 V DC/DC power convertors supplied by the power system onboard a motor vehicle (12 V battery voltage). The circuit (100) according to the invention comprises a voltage source (S) having a first terminal (+BAT) and a second terminal, at least one inductor (Lb), the first terminal of which is connected to the first terminal (+BAT) of the voltage source (S), at least one diode (Db), the anode of which is connected to the second terminal of the inductor (Lb), at least one capacitor (Cb), the first terminal of which is connected to the cathode of the diode (Db), at least one current switch (Mb) connected between the second terminal of the inductor (Lb) and the second terminal of the voltage source (S), and a second current switch (M) connected between the second terminal of the capacitor (Cb) and the second terminal of the voltage source (S).