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 method and device for predicting defects of a capacitor, the method including determining the ripple voltage (Udc), the temperature (TP), and the current (Ic) of the capacitor, determining the value of an equivalent series resistance (ESR) of the capacitor, and the capacitance value (C) of the capacitor using a digital filter, determining information representative of the state of aging of the capacitor according to the temperature of the capacitor, and displaying that information and information representative of the value of the capacitance (C) and/or information representative of a cause associated with the state of aging according to the capacitance value. The device may include a converter and an uninterruptible power supply.

Abstract: A method for shutdown of an electrical apparatus supplied by a plurality of electric power sources equipped with a management module, comprising: (a) identification of each source, (b) reading of data from the management module, (c) determination of the global autonomy of the plurality of sources with respect to said apparatus, and (d) shutdown of the apparatus when at least one shutdown criterion of the apparatus has been achieved. A shutdown device comprising communication means communicating with the management modules and comprising implementation of the previously described shutdown method. An electrical apparatus comprising control means for shutdown of said apparatus and the previously described shutdown device coupled with said control means. A system comprising a plurality of electric power sources and at least the previously described electrical apparatus.

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: An uninterruptible power supply including at least one first input, a power supply output, a first converter which is shut down when operating in economic mode, a reversible second converter, a branching and/or selection circuit for connecting an input directly to the power supply output when operating in economic mode, and control units for use when operating with the input disconnected from the power supply output, and switching between some of the units to regulate the current at the input when operating in economic mode.

Abstract: The control device of an electric power converter comprises a control device controlling turn-on of semi-conductor legs. The converter comprises DC voltage supply lines, an inverter connected between said lines and outputs. The control device comprises a processing unit to supply modulation signals of control signals of said inverter legs. The control device comprises a module for determining a general control component. The module for determining detects a detection signal representative of a highest current signal in absolute value. The detection signal is used to select a modulation signal on which an over-modulation is applied via the general control component. In the method, the detection signal is used to determine a general control component.

Abstract: The control device of an electric power converter comprises a control device controlling turn-on of semi-conductor legs. The converter comprises DC voltage power supply lines on three levels with two filtering capacitors. The control device supplies modulation signals of control signals of said legs. The control device comprises a regulating circuit to regulate the voltage variation of intermediate voltage via a general control component. The general control component is determined according to modulation signals, to signals representative of DC voltage and to signals representative of currents to take part in regulation of the intermediate voltage. The method processes voltage variation regulation via the general control component.

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.