Abstract: An electric power converter with a control device that comprises a processing unit receives control signals and sends modulated signals to inverter stages of the electric power converter. The control device also controls a common stage of the electronic power converter, which is connected between power lines and a common neutral connection. The signals to the common stage are outputted based on inputs from a modulation signal and a reference voltage signal.

Abstract: The control device of an electric power converter comprises a control device controlling turn-on of semi-conductor legs. The converter comprises a rectifier to supply a DC voltage on intermediate lines, a voltage filter connected on the intermediate lines, an inverter connected between said intermediate lines and an output, and a common neutral connection. The control device comprises a processing unit to supply modulation signals of control signals of said inverter legs. The control device controls a common leg comprising electronic power components connected between said intermediate lines and the common neutral connection. The processing unit controls said common leg according to a modulation signal of said common leg determined with a reference voltage setpoint.

Abstract: The control device of a converter comprises a control circuit for controlling power semi-conductors to supply from a power supply at least one pulsed voltage to an electric load connected to said converter by at least two conductors of at least one power supply line. The circuit controls power semi-conductors to supply on conductors of the line a first pulsed voltage having a first front then a second front after a preset time delay to compensate voltage reflection effects on said line, said time delay being comprised between one and three times a propagation time of a voltage front on said line. A converter and an installation comprise such a control device. A process comprises steps to supply voltage pulses with said fronts.