Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Léo Sterna

Pierre Perichon

Othman Ladhari

Dominique Bergogne

Jean-Paul Ferrieux

Charley Lanneluc

David Frey

Pierre-Olivier Jeannin

An uninterruptible power supply circuit in the form of a dual active bridge converter includes first terminals which are configured to be connected to a first AC electrical network, second terminals which are configured to be connected to a second AC electrical network, and third terminals which are configured to be connected to a DC voltage source, the uninterruptible power supply circuit further comprising a transformer comprising a primary and a first secondary, a first electrical branch comprising the primary, the first electrical branch being connected to a first switch circuit configured to make it possible to exchange energy with the first terminals via the primary, and a second electrical branch comprising the first secondary, the second electrical branch being connected to a second switch circuit configured to make it possible to exchange energy with the second terminals via the first secondary. The first electrical branch comprises a first inductor connected in series with the primary, the second electrical branch comprises a second inductor connected in series with the first secondary, the transformer further comprises a second secondary, a third switch circuit being connected to the second secondary and being configured to make it possible to exchange energy with the third terminals via the second secondary, so as to make it possible to exchange energy between the first AC electrical network and the DC voltage source and between the DC voltage source and the second AC electrical network.

Dual active bridge uninterruptible power supply circuit

An uninterruptible power supply circuit includes an inverter circuit configured to be connected to a first AC power grid, the power supply circuit moreover being configured to adopt a first configuration for supplying power to the first AC power grid from a second AC power grid, wherein first configuration a power factor correction circuit is configured to be connected to the second AC power grid so as to deliver a DC voltage to the inverter circuit, the power factor correction circuit comprising an inductor, and a first switch branch pertaining to the power factor correction circuit and the inverter circuit; and a second configuration for supplying power to the first AC power grid from a DC voltage source, wherein second configuration a DC-DC converter circuit is configured to be connected to the DC voltage source so as to deliver a DC voltage to the inverter circuit, the inductor moreover pertaining to the DC-DC converter circuit.

Uninterruptible power supply circuit

The present disclosure concerns a method and a circuit for controlling first and second switches electrically in series, wherein one or a plurality of crossings of a voltage threshold by a voltage across the first switch cause a conductive state of the second switch.

Control of two series connected switches

The present disclosure concerns a circuit () for controlling two switches (--) electrically in series, including sensors (--) of voltages across the switches and a circuit () of comparison of signals output by said sensors, one at least of said sensors being an active circuit.

Circuit for controlling two switches electrically in series

A power converter comprises a primary stage including four switches forming a first H bridge; a control circuit capable of applying a first control signal to the first H bridge; a secondary stage including four switches forming a second H bridge; a control circuit capable of applying a second control signal to the second H bridge; and a power transmission stage coupling the primary stage to the secondary stage, wherein the control circuit of the secondary stage is electrically isolated from the control circuit of the primary stage. During a measurement period of a synchronization phase, the switches of the secondary stage are maintained in a short-circuit configuration while the switches of the primary stage are controlled in switched mode.

Phase-controlled power converter

The instant disclosure concerns a power converter including: a primary stage () including at least one first cut-off switch (S, S, S, S); a control circuit () capable of applying a first control signal to said at least ore first switch; a secondary stage () including at least one second cut-off switch (S, S, S, S); a control circuit () capable of applying a second control signal to said at least one second switch; a power transmission stage () coupling the primary stage () to the secondary stage (), wherein the control circuit () of the secondary stage is electrically isolated from the control circuit () of the primary stage.

Power converter

An AC/DC converter including: an H bridge; an inductance in series with an input of the bridge; an inductance in series with an output of the bridge; and a circuit capable of controlling the bridge alternately to a first configuration where first and second diagonals of the bridge are respectively conductive and non-conductive, and to a second complementary configuration, the circuit being capable, during a phase of transition between the first and second configurations, of: turning on a first switch of the second diagonal; turning off a first switch of the first diagonal when the current flowing through this switch takes a zero value; turning on the second switch of the second diagonal; and turning off the second switch of the first diagonal when the current flowing through this switch takes a zero value.

Bidirectional AC/DC H-bridge power converter

An AC/DC conversion circuit, including: four bidirectional switches forming an H bridge; a capacitor connected between input nodes of the bridge; a capacitor connected between output nodes of the bridge; and a control circuit capable of controlling the bridge alternately to a first configuration where first and second diagonals of the bridge are respectively conductive and non-conductive, and to a second configuration where the first and second diagonals are respectively non-conductive and conductive, the control circuit being capable, during a phase of transition between the first and second configurations, of: turning off the switches of the first diagonal; and for each switch of the second diagonal, turning on the switch only when the voltage thereacross takes a zero value.

Direct conversion switched-mode AC/DC converter

An electronic converter allows a power transfer from an AC voltage source, connected between an input terminal and a common terminal, to a load connected between an output terminal and a reference terminal, the AC voltage including positive alternations interspersed with negative alternations at a first frequency. The converter includes an input inductance connected to the input terminal; an output inductance connected to the output terminal; a storage capacitor between the inductances; a chopper circuit that: in a first state, charges the input inductance via the AC voltage source and discharges the storage capacitance in the output inductance by supplying the load; in a second state, discharges the input inductance in the storage capacitance and discharges the output inductance by supplying the load; and a device for controlling the chopper circuit to activate, during each alternations, consecutive operating cycles at a second frequency higher than the first frequency.

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Grenoble, France

Léo Sterna