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 to supply an AC voltage on a modulated signal output, having two switching units each provided with a DC voltage input and a switching output to supply pulses varying between the voltage on the input in a first switched state, and a reference voltage in a second switched state, each switching unit comprising a first switch connected between the input and the switching output to establish the first switched state, and for each switching unit, a second switch connected between the switching output and the modulated signal output to activate that switching unit, and a third switch connected between the input of that switching unit and the modulated signal output. The converter may be a part of an uninterruptible power supply.

Abstract: A multi-level converter to at least convert an AC switched voltage available on a switched voltage point into at least five DC voltage levels available on positive and negative DC voltage lines, said converter comprising two separate switching units to convert respectively positive and negative half-waves of said switched voltage, connected to the DC voltage lines respectively presenting positive and negative DC voltage levels, and wherein each switching unit comprises a switching point connected to said switched voltage point by means of change-over means. An uninterruptible power supply comprising said 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 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 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 to supply an AC voltage on a modulated signal output comprising two switching units each provided with a DC voltage input and a switching output to supply pulses varying between the voltage on the input in a first switched state, and a reference voltage in a second switched state, each switching unit comprising a first switch connected between the input and the switching output to establish said first switched state, said device comprising, for each switching unit, a second switch connected between said switching output and said modulated signal output to activate said switching unit, and a third switch connected between the input of said switching unit and the modulated signal output. An uninterruptible power supply provided with this converter.

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: 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 multi-level converter to at least convert an AC switched voltage available on a switched voltage point into at least five DC voltage levels available on positive and negative DC voltage lines, said converter comprising two separate switching units to convert respectively positive and negative half-waves of said switched voltage, connected to the DC voltage lines respectively presenting positive and negative DC voltage levels, and wherein each switching unit comprises a switching point connected to said switched voltage point by means of change-over means. An uninterruptible power supply comprising said converter.

Abstract: A method for predicting defects of at least one capacitor comprising: determining the ripple voltage, the temperature, and the current of the capacitor, determining the value of an equivalent series resistance of the capacitor and the capacitance value of the capacitor by means of a digital filter, determining an item of information representative of the state of ageing of the capacitor according to the temperature of the capacitor, and displaying said information and information representative of the value of the capacitance or/and information representative of at least one cause associated with the state of ageing according to the capacitance value. A device for predicting defects of at least one capacitor to implement the method. A converter and uninterruptible power supply comprising the device.

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: An uninterruptible power supply comprising: 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 to connect an input directly to the power supply output when operating in economic mode, control means comprising a set of units used when operating in normal mode in which the input is disconnected from the power supply output and means for switching between a part of said units to regulate the quality of the current on the input when operating in economic mode. A method for implementing an uninterruptible power supply.

Abstract: A DC voltage conversion device comprising: first conversion means, transformation means connected to the first conversion means, and superposition and rectifying means connected to the first conversion means and to the transformation means, and supplying an output voltage comprising pulses having equal amplitudes to the sum of the amplitudes of the pulses of the primary and the secondary pulsed voltage. A converter for converting a DC voltage into AC voltage comprising the DC voltage conversion device, filtering means being connected on output of the superposition and rectifying means of said conversion device. An uninterruptible electric power supply comprising a converter for converting a DC voltage into AC voltage connected to storing means, said converter comprising the DC voltage conversion device to convert the DC voltage of said storing means.

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.