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: The device enables bi-directional optical communication between a master module and slave modules by means of an optical rod (1) made of transparent material. The master module is axially coupled to the rod. The modules are arranged laterally along a useful part of the rod bounded by a lateral reflector located opposite the slave modules. The lateral reflector can be formed by a plurality of adjacent notches (12) formed at the surface of the rod and constituting a continuous reflecting zone in the form of serrated teeth, and/or by a narrow reflecting strip (17). The slave modules can be positioned anywhere along the useful part of the rod and their lateral location is not critical, a lateral coupling zone extending over at least 1 cm outside the rod. Such a device can be advantageously used in an electrical panel.

Abstract: The device enables bi-directional optical communication between a master module and slave modules by means of an optical rod (1) made of transparent material. The master module is axially coupled to the rod. The modules are arranged laterally along a useful part of the rod bounded by a lateral reflector located opposite the slave modules. The lateral reflector can be formed by a plurality of adjacent notches (12) formed at the surface of the rod and constituting a continuous reflecting zone in the form of serrated teeth, and/or by a narrow reflecting strip (17). The slave modules can be positioned anywhere along the useful part of the rod and their lateral location is not critical, a lateral coupling zone extending over at least 1 cm outside the rod. Such a device can be advantageously used in an electrical panel.

Abstract: The protection relay comprises a processing unit and temperature sensors associated to conductors, an ambient temperature sensor, and setting devices connected to circuits which perform tripping functions. A first short delay tripping circuit supplies a tripping order to a relay if a value of the temperature variation of a conductor exceeds a first setting threshold. A second long delay tripping circuit supplies a tripping order to the relay if a value of the temperature difference between the temperature of a conductor and the ambient temperature exceeds a second setting threshold. The protection relay is used notably for trip devices and circuit breakers.

Abstract: This transistor incorporates at least one first stack of semi-conductor conduction layers and at least one second stack of semiconductor layers with a single, highly doped thin film within the second stack giving it the character of a mobile electric charge donor, superimposed and supported by a substrate as well as at least two potential barriers located in the second stack on either side of the doped thin film in order to reduce the concentration of carriers in said second stack a metal gate resting on the second stack for modifying the concentration of carriers of the charges in the first stack, two ohmic contacts being placed on one of the stacks, on either side of the gate and serving as the source and drain.