Abstract: This inverter, for electrical connection to a DC voltage source to supply an electric charge with three-phase current, includes a capacitive filter and a switching cell including, for each phase, a switching mode power supply circuit formed by two sets of controlled switches. Each set of controlled switches supplies a separate terminal of the switching cell, which also includes a sealed housing containing the switching mode power supply circuits. The housing is provided, on two opposite surfaces, with heat exchange means with a heat transfer fluid. A distributor is mounted, upstream from the housing, in a heat transfer fluid circulation circuit, to steer the heat transfer fluid toward the two opposite surfaces of the housing. The capacitive filter is cooled using at least one heat pipe. Part of this heat pipe, where the condensation of a fluid contained in the heat pipe occurs, is in thermal contact with the distributor.

Abstract: This inverter, for electrical connection to a DC voltage source to supply an electric charge with three-phase current, includes a capacitive filter and a switching cell including, for each phase, a switching mode power supply circuit formed by two sets of controlled switches. Each set of controlled switches supplies a separate terminal of the switching cell, which also includes a sealed housing containing the switching mode power supply circuits. The housing is provided, on two opposite surfaces, with heat exchange means with a heat transfer fluid. A distributor is mounted, upstream from the housing, in a heat transfer fluid circulation circuit, to steer the heat transfer fluid toward the two opposite surfaces of the housing. The capacitive filter is cooled using at least one heat pipe. Part of this heat pipe, where the condensation of a fluid contained in the heat pipe occurs, is in thermal contact with the distributor.

Abstract: A converter device for an uninterruptible power supply, the device having first and second main switching units connected to first and second voltage lines of a first type and each equipped with a first main switch; a main switching point connected to a voltage line of a second type and connected to the first and second main switching units; and a third main switch common to the first and second main switching units, and connected between the main switching point and a third voltage line of the first type; first, second and third capacitors connected between the main switching point and each of the first, second and third voltage lines of the first type; a first auxiliary switching unit connected by individual auxiliary switches between the first and second voltage lines of the first type, and a first auxiliary switching point; a second auxiliary switching unit connected between the first, second and third voltage lines of the first type, and a second auxiliary switching point; and a transformer having windin

Abstract: A converter to supply an AC voltage and current from three DC voltages comprising two switching units provided with first switching means connected between an input and a switching output, said converter comprising, for each switching unit, second switching means connected between said switching unit and a modulated signal output, and a switching aid circuit, said converter comprising control means acting on the second switching means associated with the switching unit that is connected to the voltage input of opposite sign to the sign of said AC voltage to establish turn-off of said second switching means when said AC voltage and said AC current are of opposite signs. An uninterruptible power supply comprising the converter described above.

Abstract: A converter device comprising a power supply input, rectifier means, switching means, control means, and a switching aid circuit, said switching aid circuit comprising inductive means, branch-off means of an input current, and power storage means. The device of the invention is characterized in that the inductive means are essentially formed by a transformer directly connected to the power supply input and comprising reverse-coiled windings, and that the branch-off means comprise auxiliary switching means directly connected between said inductive means and a voltage reference or an output line to establish branch-off of the input current onto said inductive means before main turn-on. An uninterruptible power supply comprising the converter device described above.

Abstract: A three-level reversible converter comprising two main switching units respectively equipped with a first and second main switch, a main switching point, and a third main switch common to the two main switching units, comprising: capacitors connected between said main switching point and said three levels, a first two-level auxiliary switching unit connected to a first auxiliary switching point, a second three-level auxiliary switching unit connected to a second auxiliary switching point, and a transformer equipped with windings connected between the main switching point and the auxiliary switching points. An uninterruptible power supply provided with this converter.

Abstract: A converter device comprising a power supply input, rectifier means, switching means, control means, and a switching aid circuit, said switching aid circuit comprising inductive means, branch-off means of an input current, and power storage means. The device of the invention is characterized in that the inductive means are essentially formed by a transformer directly connected to the power supply input and comprising reverse-coiled windings, and that the branch-off means comprise auxiliary switching means directly connected between said inductive means and a voltage reference or an output line to establish branch-off of the input current onto said inductive means before main turn-on. An uninterruptible power supply comprising the converter device described above.

Abstract: A converter to supply an AC voltage and current from three DC voltages comprising two switching units provided with first switching means connected between an input and a switching output, said converter comprising, for each switching unit, second switching means connected between said switching unit and a modulated signal output, and a switching aid circuit, said converter comprising control means acting on the second switching means associated with the switching unit that is connected to the voltage input of opposite sign to the sign of said AC voltage to establish turn-off of said second switching means when said AC voltage and said AC current are of opposite signs. An uninterruptible power supply comprising the converter described above.