Patents by Inventor Alain Lacarnoy
Alain Lacarnoy has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11581821Abstract: A power switching circuit including a first DC/DC converter having a first input configured to receive a first input DC voltage, a second DC/DC converter having a first input configured to receive a second input DC voltage, a DC/AC inverter having a first input coupled to the output of the first DC/DC converter and a second input coupled to the output of the second DC/DC converter, the DC/AC inverter including n (n>2) switching legs, and at least one controller coupled to the first DC/DC converter, the second DC/DC converter, and the DC/AC inverter, the at least one controller configured to operate the DC/AC inverter to provide n AC signals to at least one load coupled to the DC/AC inverter by operating two of the n switching legs in a static state and n?2 of the n switching legs in a transition state.Type: GrantFiled: May 26, 2020Date of Patent: February 14, 2023Assignee: SCHNEIDER ELECTRIC IT CORPORATIONInventors: Kepa Odriozola Sagasta, Thierry Meynard, Alain Lacarnoy
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Publication number: 20200389099Abstract: A power switching circuit including a first DC/DC converter having a first input configured to receive a first input DC voltage, a second DC/DC converter having a first input configured to receive a second input DC voltage, a DC/AC inverter having a first input coupled to the output of the first DC/DC converter and a second input coupled to the output of the second DC/DC converter, the DC/AC inverter including n (n>2) switching legs, and at least one controller coupled to the first DC/DC converter, the second DC/DC converter, and the DC/AC inverter, the at least one controller configured to operate the DC/AC inverter to provide n AC signals to at least one load coupled to the DC/AC inverter by operating two of the n switching legs in a static state and n?2 of the n switching legs in a transition state.Type: ApplicationFiled: May 26, 2020Publication date: December 10, 2020Inventors: Kepa Odriozola Sagasta, Thierry Meynard, Alain Lacarnoy
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Patent number: 10651650Abstract: At least one aspect of the disclosure is directed to an AC switching system. The AC switching system includes a first I/O, a second I/O, a first segment including a first plurality of switches, the first segment being coupled to the first I/O, a second segment including a second plurality of switches, the second segment being coupled with the first segment and coupled to the second I/O, a third segment including a diode, the third segment being coupled to the first I/O and coupled to a junction of the first segment and the second segment, and a fourth segment including a diode, the fourth segment being coupled to the second I/O and coupled to the junction of the first segment and the second segment.Type: GrantFiled: September 30, 2013Date of Patent: May 12, 2020Assignee: SCHNEIDER ELECTRIC IT CORPORATIONInventor: Alain Lacarnoy
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Patent number: 10461575Abstract: According to one aspect, embodiments of the invention provide a UPS system comprising an input, an output, a converter coupled to the input and configured to convert input power into DC power, a plurality of DC busses coupled to the converter and configured to receive the DC power from the converter, an inverter coupled to the plurality of DC busses and configured to convert the DC power from the plurality of DC busses into output AC power and provide the output AC power to the output, and a controller configured to operate the inverter, during a positive half-period of the line cycle, in a first mode of operation to provide a positive output voltage to the output, in a second mode of operation to provide a zero output voltage to the output, and a third mode of operation to provide a negative output voltage to the output.Type: GrantFiled: March 28, 2017Date of Patent: October 29, 2019Assignee: SCHNEIDER ELECTRIC IT CORPORATIONInventors: Patrick Chambon, Alain Lacarnoy
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Publication number: 20180287420Abstract: According to one aspect, embodiments of the invention provide a UPS system comprising an input, an output, a converter coupled to the input and configured to convert input power into DC power, a plurality of DC busses coupled to the converter and configured to receive the DC power from the converter, an inverter coupled to the plurality of DC busses and configured to convert the DC power from the plurality of DC busses into output AC power and provide the output AC power to the output, and a controller configured to operate the inverter, during a positive half-period of the line cycle, in a first mode of operation to provide a positive output voltage to the output, in a second mode of operation to provide a zero output voltage to the output, and a third mode of operation to provide a negative output voltage to the output.Type: ApplicationFiled: March 28, 2017Publication date: October 4, 2018Inventors: Patrick Chambon, Alain Lacarnoy
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Patent number: 9941735Abstract: An uninterruptible power supply operates between a main supply input, a battery and a load, and comprises an input converter and an output converter. In a first mode of operation, AC mains power received at the supply input is converted by said input converter and output converter in series to provide an AC power supply to the load. In a second mode of operation, stored energy is released from the battery via the output converter to maintain the AC power supply to the load. A further converter can be used during the first mode of operation to charge the battery from a charging supply input. The charging current bypasses the input converter, allowing charging rate to be increased, without increasing a power rating of the input converter. The further converter may be bidirectional and be used also in the second mode.Type: GrantFiled: October 11, 2012Date of Patent: April 10, 2018Assignee: SCHNEIDER ELECTRIC IT CORPORATIONInventor: Alain Lacarnoy
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Publication number: 20160241030Abstract: At least one aspect of the disclosure is directed to an AC switching system. The AC switching system includes a first I/O, a second I/O, a first segment including a first plurality of switches, the first segment being coupled to the first I/O, a second segment including a second plurality of switches, the second segment being coupled with the first segment and coupled to the second I/O, a third segment including a diode, the third segment being coupled to the first I/O and coupled to a junction of the first segment and the second segment, and a fourth segment including a diode, the fourth segment being coupled to the second I/O and coupled to the junction of the first segment and the second segment.Type: ApplicationFiled: September 30, 2013Publication date: August 18, 2016Applicants: SCHNEIDER ELECTRIC IT CORPORATION, SCHNEIDER ELECTRIC IT CORPORATIONInventor: Alain LACARNOY
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Publication number: 20150270744Abstract: An uninterruptible power supply operates between a main supply input, a battery and a load, and comprises an input converter and an output converter. In a first mode of operation, AC mains power received at the supply input is converted by said input converter and output converter in series to provide an AC power supply to the load. In a second mode of operation, stored energy is released from the battery via the output converter to maintain the AC power supply to the load. A further converter can be used during the first mode of operation to charge the battery from a charging supply input. The charging current bypasses the input converter, allowing charging rate to be increased, without increasing a power rating of the input converter. The further converter may be bidirectional and be used also in the second mode.Type: ApplicationFiled: October 11, 2012Publication date: September 24, 2015Applicant: SCHNEIDER ELECTRIC IT CORPORATIONInventor: Alain Lacarnoy
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Patent number: 8638007Abstract: 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.Type: GrantFiled: October 20, 2010Date of Patent: January 28, 2014Assignee: MGE UPSInventors: Corentin Rizet, Alain Lacarnoy
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Patent number: 8598749Abstract: 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.Type: GrantFiled: January 19, 2011Date of Patent: December 3, 2013Assignee: MGE UPSInventor: Alain Lacarnoy
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Patent number: 8488336Abstract: 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.Type: GrantFiled: October 20, 2010Date of Patent: July 16, 2013Assignee: MGE UPSInventor: Alain Lacarnoy
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Patent number: 8384246Abstract: 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.Type: GrantFiled: August 10, 2009Date of Patent: February 26, 2013Assignee: MGE UPS SystemsInventors: Corentin Rizet, Alain Lacarnoy, Jean-Paul Ferrieux
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Publication number: 20110193412Abstract: 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.Type: ApplicationFiled: January 19, 2011Publication date: August 11, 2011Applicant: MGE UPSInventor: Alain Lacarnoy
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Publication number: 20110133554Abstract: 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.Type: ApplicationFiled: August 10, 2009Publication date: June 9, 2011Applicant: MGE UPS SystemsInventors: Corentin Rizet, Alain Lacarnoy, Jean-Paul Ferrieux
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Publication number: 20110110136Abstract: 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.Type: ApplicationFiled: October 20, 2010Publication date: May 12, 2011Applicant: MGE UPSInventor: Alain Lacarnoy
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Publication number: 20110109162Abstract: 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.Type: ApplicationFiled: October 20, 2010Publication date: May 12, 2011Applicant: MGE UPSInventors: Corentin Rizet, Alain Lacarnoy