Abstract: A DC-to-AC power converter having a main DC input and a main single-phase AC output, configured to convert and adapt a DC voltage at the main DC input into a sinusoidal AC voltage of a fundamental frequency at the main AC output and to deliver a rated power at the main AC output to a load includes: a single DC-to-DC converter having as input the main DC input and having a DC output and a tank capacitor being connected to the DC output, two low frequency diodes biased so as to be able to pass current from, respectively to, the DC output to, respectively from, the tank capacitor; and, according to a direct path, a bidirectional voltage-type DC-to-AC converter in cascade with the DC-to-DC converter, the bidirectional voltage-type DC-to-AC converter having a DC input-output connected to the DC output and an AC output-input connected to the main AC output.

Abstract: A DC-to-AC power converter having a main DC input and a main single-phase AC output, configured to convert and adapt a DC voltage at the main DC input into a sinusoidal AC voltage of a fundamental frequency at the main AC output and to deliver a rated power at the main AC output to a load includes: a single DC-to-DC converter having as input the main DC input and having a DC output and a tank capacitor being connected to the DC output, two low frequency diodes biased so as to be able to pass current from, respectively to, the DC output to, respectively from, the tank capacitor; and, according to a direct path, a bidirectional voltage-type DC-to-AC converter in cascade with the DC-to-DC converter, the bidirectional voltage-type DC-to-AC converter having a DC input-output connected to the DC output and an AC output-input connected to the main AC output.

Abstract: The present invention relates to a single phase, non-insulated, miniaturized DC/AC power inverter having an output power density higher than 3000 W/dm3, wherein said power inverter is packaged in a casing made of an external electrically conductive enclosure containing a fan blowing in an axial direction to a side face of the casing and, in a stacked elevation arrangement, successively from a bottom side to a top side, a layer of active filter capacitors, a heatsink, a layer of wideband semiconductors switches connected to a PCB with thermal vias and a layer of active filtering inductors, the fan and the component stacked arrangement being designed so as, in operation, the external temperature of the casing does not overcome 60° C. in any point, for an ambient temperature of maximum 30° C. under a maximum load of 2 kVA.

Abstract: The present invention is related to a method for controlling a high frequency dual bridge DC/DC power converter of nominal frequency (fN) and nominal power (PN), in a wide range of input voltage and with power overload capacity up to 200%, said method comprising a step of varying, in a range up to the value of ? radians, a first phase shift (?HB) between the voltage of the full bridge and the voltage of the half bridge, while—varying the operation frequency (f) simultaneously with the said first phase shift and/or—inducing a second phase shift (?FB) between the voltages of the two half bridges or branches constituting the full bridge, modifying thereby the first phase shift (?HB) between the voltage of the full bridge and the voltage of the half bridge and/or—decreasing the operation frequency (f) towards the LC resonance frequency (f0) of the circuit, so as to minimize the switch losses in the DC/DC converter during operation.

Abstract: The present invention relates to a single phase, non-insulated, miniaturized DC/AC power inverter (1) having an output power density higher than 3000 W/dm3, wherein said first (S1_H), second (S1_L), third (S2_H) and fourth (S2_L) switches are made of wide-band semiconductors and preferably of gallium nitride or GaN semiconductors; and wherein said DC/AC power inverter (1) further comprises: a ripple-compensating active filter comprising a third half-bridge (203) having a fifth switch (S3_H) in series with a sixth switch (S3_L), said fifth switch (S3_H) being connected at one end to the positive terminal (L+) of the DC input, said sixth switch (S3_L) being connected at one end to the negative terminal (L?) of the DC input,the other end of the fifth switch (S3_H) being connected to the other end of the sixth switch (S3_L), defining a third common end, said third common end being connected to a first end of a LC filter, made of at least one inductor (L6) and one storage capacitor (C5), a second end of the LC fil

Abstract: The present invention relates to a single phase, non-insulated, miniaturized DC/AC power inverter (1) having an output power density higher than 3000 W/dm3, wherein said first (S1_H), second (S1_L), third (S2_H) and fourth (S2_L) switches are made of wide-band semiconductors and preferably of gallium nitride or GaN semiconductors; and wherein said DC/AC power inverter (1) further comprises: a ripple-compensating active filter comprising a third half-bridge (203) having a fifth switch (S3_H) in series with a sixth switch (S3_L), said fifth switch (S3_H) being connected at one end to the positive terminal (L+) of the DC input, said sixth switch (S3_L) being connected at one end to the negative terminal (L?) of the DC input,the other end of the fifth switch (S3_H) being connected to the other end of the sixth switch (S3_L), defining a third common end, said third common end being connected to a first end of a LC filter, made of at least one inductor (L6) and one storage capacitor (C5), a second end of the LC fil

Abstract: The present invention relates to a single phase, non-insulated, miniaturized DC/AC power inverter having an output power density higher than 3000 W/dm3, wherein said power inverter is packaged in a casing made of an external electrically conductive enclosure containing a fan blowing in an axial direction to a side face of the casing and, in a stacked elevation arrangement, successively from a bottom side to a top side, a layer of active filter capacitors, a heatsink, a layer of wideband semiconductors switches connected to a PCB with thermal vias and a layer of active filtering inductors, the fan and the component stacked arrangement being designed so as, in operation, the external temperature of the casing does not overcome 60° C. in any point, for an ambient temperature of maximum 30° C. under a maximum load of 2 kVA.

Abstract: The present invention is related to a method for controlling a high frequency dual bridge DC/DC power converter of nominal frequency (fN) and nominal power (PN), in a wide range of input voltage and with power overload capacity up to 200%, said method comprising a step of varying, in a range up to the value of ? radians, a first phase shift (?HB) between the voltage of the full bridge and the voltage of the half bridge, while—varying the operation frequency (f) simultaneously with the said first phase shift and/or—inducing a second phase shift (?FB) between the voltages of the two half bridges or branches constituting the full bridge, modifying thereby the first phase shift (?HB) between the voltage of the full bridge and the voltage of the half bridge and/or—decreasing the operation frequency (f) towards the LC resonance frequency (f0) of the circuit, so as to minimize the switch losses in the DC/DC converter during operation.

Abstract: A DC-to-AC power converter (1) includes: a current-type DC-to-AC converter (70) having a first DC input (80) and a first AC output (85), said first DC input (80) being connected in parallel to said main DC input (10) and said first AC output (85) being connected in parallel to said main AC output (20); and a controller (110) for: controlling said bidirectional voltage-type DC-to-AC converter (50) for delivering at said first AC output-input (65) a sinusoidal AC voltage of said fundamental frequency f0; controlling said current-type DC-to-AC converter (70) for delivering at said first AC output (85) a quasi square-type AC current of said fundamental frequency ID and in phase with said sinusoidal AC voltage; imposing that at least 70% of said rated current is provided by said current-type DC-to-AC converter (70).

Abstract: The present invention comprises a DC-to-AC power converter (1) comprising: a current-type DC-to-AC converter (70) having a first DC input (80) and a first AC output (85), said first DC input (80) being connected in parallel to said main DC input (10) and said first AC output (85) being connected in parallel to said main AC output (20); and control means (110) for: controlling said bidirectional voltage-type DC-to-AC converter (50) for delivering at said first AC output-input (65) a sinusoidal AC voltage of said fundamental frequency f0; controlling said current-type DC-to-AC converter (70) for delivering at said first AC output (85) a quasi square-type AC current of said fundamental frequency f0 and in phase with said sinusoidal AC voltage; imposing that at least 70% of said rated current is provided by said current-type DC-to-AC converter (70).

Abstract: The present invention relates to a remote-receiving circuit (1) for providing and controlling an electric stimulus applied to an animal, the circuit (1) comprising: an isolated DC/DC converter (4) having a low voltage input powered by an energy source (3) and a high voltage output connected to a storage capacitor (8) suitable to be charged with stimulus energy by said converter (4); a first electrode (5) and a second electrode (6) configured to be in contact with the animal for delivering to it high voltage stimulus current and connected to the respective ends of said storage capacitor (8); a current-limiting circuit (9) connected in series with the storage capacitor (8) to control the stimulus current delivered to the animal through the electrodes (5, 6).

Abstract: A remote receiving circuit for providing and controlling an electric stimulus applied to an animal including an electronic switch powered by a battery in series on a primary of a high-voltage transformer and whose on/off state can be modified by control pulses to create a source of alternating current to supply the primary of the transformer. The circuit further includes a first electrode and a second electrode configured to be in contact with the animal and connected to the respective ends of a secondary of the transformer, and a device for measuring the peak intensity of a stimulus current applied by the electrodes to the animal's body.

Abstract: The present invention relates to a remote-receiving circuit (1) for providing and controlling an electric stimulus applied to an animal, the circuit (1) comprising: an isolated DC/DC converter (4) having a low voltage input powered by an energy source (3) and a high voltage output connected to a storage capacitor (8) suitable to be charged with stimulus energy by said converter (4); a first electrode (5) and a second electrode (6) configured to be in contact with the animal for delivering to it high voltage stimulus current and connected to the respective ends of said storage capacitor (8); a current-limiting circuit (9) connected in series with the storage capacitor (8) to control the stimulus current delivered to the animal through the electrodes (5, 6).

Abstract: A communication method for transmitting a digital data sequence by a transmitter to a remote receiver, using frequency hopping spread spectrum, said data sequence comprising a plurality of blocks terminated by an end block, each block consisting of a plurality of consecutive data frames interspersed in time, each block being modulated at a carrier frequency belonging to a predetermined ordered hopset, the method comprising the steps of: activating the data sequence transmission by pressing a switch located at the transmitter side; transmitting the data sequence using the transmitter; receiving and demodulating the data sequence at the receiver; wherein each data frame is provided with at least one additional bit so that to allow the receiver to determine either if the last received block is the end block of the sequence, or the time position of any frame inside each non-end block.

Abstract: A remote receiving circuit for providing and controlling an electric stimulus applied to an animal including an electronic switch powered by a battery in series on a primary of a high-voltage transformer and whose on/off state can be modified by control pulses to create a source of alternating current to supply the primary of the transformer. The circuit further includes a first electrode and a second electrode configured to be in contact with the animal and connected to the respective ends of a secondary of the transformer, and a device for measuring the peak intensity of a stimulus current applied by the electrodes to the animal's body.

Abstract: Device for transmitting energy in a system for cabled telecommunication. The system comprises first and second pairs of telecommunication wires (TP). The device comprises a central module or base station arranged to be connected to an electrical energy source and for the first and second pairs of wires to be connected thereto. A satellite comprises a first satellite converter. The first satellite converter comprises a first input arranged for the first pair of wires to be connected thereto and a second input arranged for the second pair of wires to be connected thereto.

Abstract: The invention concerns a dc-to-dc converter controlled by a rectangular signal comprising an input for a direct voltage source (VDC), a transformer comprising a primary coil (1) connected to the direct voltage source (VDC) and a D2 secondary coil (2), a single switch (S) series-connected with the primary (1) and the direct voltage source (VDC), an output comprising the transformer secondary (2) and at least a tertiary coil (3) located in the proximity of the primary (1) and secondary (2) coils at the transformer core series-connected with a first diode (D1).