Thales

Sextant Avionique

Sexant Avionique

Thomson-Csf Sexant

Christophe Taurand

François Klein

Francois Klein

Guillaume Vire

Flavien Blanc

Régis Quer

Bernard Bedouet

Stefan Mollov

Arnaud Bretez

Vivien Lagorce

Thierry Ros

Philippe Bogdanik

This converter includes a controllable switch (M) and a control device () for generating a signal for controlling the opening and closing instants of the switching switch, the control device being of the control device type in a current mode requiring the application of a current stabilization signal. The control device includes a component () delivering a stabilization signal (RC) intermittently, by applying the stabilization signal (RC) at a predetermined instant which precedes a reference instant; and a comparator () for generating a control signal (CM) of the controllable switch (M) from the comparison of a set value signal (&#xce;L) and of a measurement signal corresponding to the current (IL) flowing in an impedance (L) of the converter, the intermittent stabilization signal (RC) being subtracted from the set value signal (&#xce;L) or added to the measurement signal before applying the comparator.

Switching energy converter with reduction of the static bias introduced by a stabilizing ramp

A converter comprising a switch and a control device in 'peak charge' mode for generating a command of the switch, and which comprises an error corrector between an output voltage and a reference voltage, a comparison means between a reference charge and a measured charge resulting from the time integration of the current circulating in the switch to develop the command signal, the error signal at the output of the error corrector being a reference power, the control device comprising a conversion unit comprising a divider dividing the reference power by the input voltage to obtain the reference charge.

Switching power converter with a maximum current mode control

The invention relates to a power supply system that is adapted be connected in input to N distinct power supply grids (R, . . . , R) delivering a direct or alternating input voltage (V, V) and to deliver a direct distribution voltage (V), N being an integer greater than or equal to 2, of the type comprising a distribution bus operating under the distribution voltage (V), N unidirectional converters (C, . . . , C) that can respectively be connected in input to a given power grid (R, . . . , R), and control means capable of controlling the unidirectional converters (C, . . . C). The power supply system also includes an energy storage device connected to the distribution bus and having a quantity of energy (E), and the control means are adapted to control the unidirectional converters (C, . . . C) simultaneously to regulate the electrical power (P, . . . P) delivered by each of said unidirectional converters (C, . . . , C) as a function of the quantity of energy (E).

Power supply system with heterogeneous multiple input

An electric power supply system, comprising: The auxiliary switching cell () comprises at least two switching capacitors (C, C) positioned parallel to one of the secondary switches (T, T) for one of them and parallel to one of the main switches (T, T) for the other one. An aircraft comprising at least such a power supply system.

Switched-mode power supply system and aircraft comprising such a system

A power supply system with prioritized network selection is disclosed. In one aspect, the system can be connected to the output of N power supply networks (R, . . . , R), N being an integer greater than or equal to 2. It includes N controllable energy transfer members (T, . . . , T) each connected to a power supply network (R, . . . , R), control subsystem () for selecting one power supply network (R, . . . , R) by commanding the controllable member (T, . . . , T) connected to the selected power supply network (R, . . . , R) into a closed position, and energy storage subsystem capable of delivering a storage voltage (V). It may also comprise an energy converter connected to the output to the N controllable energy transfer members (T, . . . , T), the control subsystem being able to command the energy converter and the N controllable energy transfer members (T, . . . , T) to select at most one energy source from among the N power supply networks (R, . . . , R), as a function of the N input voltages (V, . . . , V) and the storage voltage (V).

Power supply system with prioritized network selection

This electric energy conversion system of the type including a main converter () connected at the input to at least one input network () operating under an input voltage and at the output to an output network () operating under an output voltage and associated with an electric energy storage device, operating under a storage voltage, including a bidirectional charger () connected to the output network () on the one hand and to capacitive electric energy storage means () on the other hand, the operation of the bidirectional charger () being driven by control means () for slaving the output voltage on a first set value (V), is characterized in that the operation of the main converter () is driven by control means () for slaving the storage voltage on a second set value (V).

Electric energy conversion system

This regulated power supply system with high input voltage dynamics, of the type having a shared inductance buck/boost transformer and having at least two controllable semiconductor switching members, one associated with the buck function of the transformer and the other with the boost function of the transformer, is characterized in that one of the controllable semiconductor switching members is driven by control means as a function of the system's input voltage, and the other is driven continuously by enslavement means on the output voltage.

Regulated power supply system with high input voltage dynamics

An electrostatic device for damping a mechanical vibration movement of a moving object, the moving object being made of an electrically conductive material, the movement of the moving object having at least one parasitic vibration mode of frequency fto be damped, the device comprising an electrode ELE forming, with the moving object, a gap of capacitance C voltage-biased with a DC voltage Vby a biasing circuit, the biasing circuit comprising, electrically connected in series with the electrode ELE: a load resistance R; possibly an inductance L; a parasitic capacitance C, characterized in that the biasing circuit further includes an electronic compensating device DEC having an impedance Z, which comprises a capacitance component C, a resistance component Req, and possibly an inductance component L.

Electrostatic device for damping a mechanical vibration movement of a resonant moving object

An insulated transfer device with particular topology, comprising on the primary, a switched-mode voltage step-up circuit, with a step-up inductance (L) and an active buffer stage (D, M, C) supplying a peak voltage greater than the peak voltage supplied by the input voltage source (v) and two pairs of controlled switches controlling the application of the voltage supplied by the switched-mode voltage step-up circuit, to the terminals (E, E) of the primary winding and to the secondary, a full-wave rectifier with diodes (D, D) and controlled switches (M, M). On the primary, the voltage at the terminals of the capacitor Cof the active buffer stage used to apply a controlled AC voltage between the terminals Epand Epis regulated by controlling the time for which the controlled switches of the pairs are simultaneously in the closed state. On the secondary, Vis regulated by controlling the time for which the secondary switches are simultaneously in the closed state.

Insulated power transfer device

In an energy storage device comprising a series network of n storage elements C, . . . C, able to provide a continuous voltage across its terminals, a system for equilibrating the elements is envisaged comprising a plurality of charge transfer modules M, each module Mensuring a bidirectional transfer of charge linear to first order between two storage elements Cand Cof the said network. Each energy storage element is connected to p modules, p&#x2266;n&#x2212;1, each of the p modules pairing the said element with another element of the network. The time required for reequilibrating is thus reduced.

System for equilibrating an energy storage device

This AC/DC converter is an isolated converter with switch-mode current regulation by means of a controlled switch (). The controlled switch () is protected by a current limiting device () obeying a peak current setpoint proportional to the instantaneous voltage from the power supply source (Vin). This allows the quality of the absorbed current to be improved and the risks of interference from the switch-mode power supply to be limited while at the same time satisfying the new demands on avionics power networks.

AC/DC converter with low harmonic currents

A high-output ratio DC DC converter supplies at least two regulated output voltages, a positive voltage Vs+ and a negative voltage Vs&#x2212; from a direct current voltage Vin applied at the input, by means of two voltage boost structures with pairs of switches SBpSHpand groups of input capacitors Ginand output capacitors Goutcontrolled by an inductive stage with inductance Lin and controlled switch M, a level translator circuit with capacitor Ct and direct diode Dt being provided between the said inductive stage and the structure supplying the negative output voltage.

DC DC voltage boost converter

The invention relates to a device for measuring current in an inductor and being connected in parallel with said inductor. The device includes a network in parallel with the inductor and connected to the terminals A and B comprising a resistor Rin series with a resistor Rin parallel with a capacitor C; a voltage offset circuit having a DC voltage generator E connected in parallel with an offset resistor (Roffset) in series with two parallel resistors Rand R, the positive pole of the voltage source being connected to terminal B of the inductor; a temperature compensation circuit comprising a current source controlled as a function of the temperature, one of the two terminals of the current source being connected to the negative pole of the generator E, the other terminal of the current source being connected to different points of the measurement device.

Device for non-dissipative measurement of the current in an inductor

A cellular inverter generates an alternating output voltage by a succession of serial combinations of DC voltage electrical sources that are available to it within switchable cells and, within a serial combination currently in use, by a voltage regulation using high-frequency chopping. This voltage regulation exhibits a certain lag and allows through an undesirable voltage step during the repositioning of its operating range caused by a change of the serial combination currently in use. The cellular inverter proposed comprises, in its high-frequency switch-mode voltage regulation circuit illustrated in the figure, a pre-compensation circuit that allows the lag to be compensated for and this undesirable voltage step to be considerably attenuated.

Cellular inverter with reduced switching distortion rate

Voltage booster converter comprising a pair of input terminals A and B for connecting a DC input voltage Vin between these two terminals; a pair Pof switches SB, SH in series connected by the switch SB to the input terminal B, the input terminal A being connected across an input inductor Lin to the connection point between the two switches SB and SH in series, each switch SB, SH comprising a control input so as to be placed simultaneously, one in an on state the other in an isolated state; a pair of output terminals C and D, for powering, by an output voltage Vout, a load Rout, the output terminal D being connected to the input terminal B; K other additional pairs P, P, . . . P, . . . P, Pof switches in series between the output terminal C and the free side of the switch SH with i=1, 2, . . . K&#x2212;1, K, the two switches of one and the same additional pair Pbeing connected across an energy recovery inductor Lr; K input groups, Gin, Gin, . . . Gin, . . . Gin, Gin, of Ni capacitors C of like value each in series, with i=1, 2, . . . K&#x2212;1, K and Ni=i; K output groups, Gout, Gout, . . . Gout, . . . Gout, Gout, of Mi capacitors C of like value each in series, with i=1, 2, . . . K and Mi=(K+1)&#x2212;i. The switches of these other K additional pairs are controlled simultaneously by the first and second complementary control signals.

Growing community of inventors

Valence, France

Christophe Taurand