Patents by Inventor Damir Klikic
Damir Klikic 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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Publication number: 20110043042Abstract: An uninterruptible power supply (UPS) system includes an AC power input configured to receive AC power from a single-phase AC power source or a multi-phase AC power source, a DC power source, an output circuit including a power output, a controllable switch configured to selectively couple at least one of the AC power input and the DC power source to the output circuit, and a processor coupled and configured to affect operation of the output circuit depending upon which of single-phase and multi-phase operation of the UPS is indicated.Type: ApplicationFiled: October 29, 2010Publication date: February 24, 2011Applicant: AMERICAN POWER CONVERSION CORPORATIONInventors: DAMIR KLIKIC, MIRZA A. BEG, MARK R. MELANSON, EDWARD KOTLYAR, JEFFREY B. SAMSTAD
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Patent number: 7881079Abstract: Systems and methods disclosed herein monitor and control input to a converter in one or more of a UPS, a frequency converter, or a line conditioner. Distortion due at least in part to ripple voltage can be removed from a control signal that controls input current to the converter. The systems and methods described herein afford a simple and effective way to reduce or eliminate one or more of subharmonic oscillation and total harmonic distortion from a converter input current during synchronous and asynchronous modes of operation. The converter may include one or more of a rectifier and an inverter.Type: GrantFiled: March 24, 2008Date of Patent: February 1, 2011Assignee: American Power Conversion CorporationInventors: Pyboyina Prasad, Rajesh Ghosh, Damir Klikic
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Publication number: 20100315849Abstract: Systems and methods for operating an uninterruptable power supply are provided. The uninterruptable power supply may include a rectifier that has a transistor and an inductor. The uninterruptable power supply may also include a controller. A current sensor can be configured to detect inductor current and to provide a detected inductor current value to the controller to generate a current error value based and to generate a pulse width modulation control signal based in part on the current error value. The controller can apply the pulse width modulation control signal to the transistor to adjust a switching frequency of the transistor.Type: ApplicationFiled: June 16, 2009Publication date: December 16, 2010Applicant: AMERICAN POWER CONVERSION CORPORATIONInventors: Michael J. Ingemi, Damir Klikic
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Patent number: 7843676Abstract: An uninterruptible power supply (UPS) system includes an AC power input configured to receive AC power from a single-phase AC power source or a multi-phase AC power source, a DC power source, an output circuit including a power output, a controllable switch configured to selectively couple at least one of the AC power input and the DC power source to the output circuit, and a processor coupled and configured to affect operation of the output circuit depending upon which of single-phase and multi-phase operation of the UPS is indicated.Type: GrantFiled: March 11, 2009Date of Patent: November 30, 2010Assignee: American Power Conversion CorporationInventors: Damir Klikic, Mirza A. Beg, Mark R. Melanson, Edward Kotlyar, Jeffrey B. Samstad
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Publication number: 20100295374Abstract: At least one aspect is directed to an uninterruptible power supply that includes a first input having an input line connection and an input neutral connection to receive a first input voltage from a first voltage source, a second input to receive a second input voltage from a second voltage source, and a boost circuit configured to provide a positive output DC voltage with respect to the input neutral connection and a negative output DC voltage with respect to the input neutral connection in both a line mode of operation and a backup mode of operation. The power supply also includes a first connection circuit to couple the first input to the boost circuit in the line mode of operation, and a second connection circuit to couple the second input to the boost circuit in the backup mode of operation, the second connection circuit being configured to isolate the second voltage source from the input neutral connection in the line mode of operation.Type: ApplicationFiled: April 26, 2010Publication date: November 25, 2010Applicant: AMERICAN POWER CONVERSION CORPORATIONInventors: Henning Roar Nielsen, Ranganathan Gurunathan, Pothapragada Pavana Kumar, Damir Klikic
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Patent number: 7705489Abstract: At least one aspect is directed to an uninterruptible power supply that includes a first input having an input line connection and an input neutral connection to receive a first input voltage from a first voltage source, a second input to receive a second input voltage from a second voltage source, and a boost circuit configured to provide a positive output DC voltage with respect to the input neutral connection and a negative output DC voltage with respect to the input neutral connection in both a line mode of operation and a backup mode of operation. The power supply also includes a first connection circuit to couple the first input to the boost circuit in the line mode of operation, and a second connection circuit to couple the second input to the boost circuit in the backup mode of operation, the second connection circuit being configured to isolate the second voltage source from the input neutral connection in the line mode of operation.Type: GrantFiled: September 8, 2006Date of Patent: April 27, 2010Assignee: American Power Conversion CorporationInventors: Henning Roar Nielsen, Ranganathan Gurunathan, Pothapragada Pavana Kumar, Damir Klikic
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Publication number: 20090237963Abstract: Systems and methods disclosed herein monitor and control input to a converter in one or more of a UPS, a frequency converter, or a line conditioner. Distortion due at least in part to ripple voltage can be removed from a control signal that controls input current to the converter. The systems and methods described herein afford a simple and effective way to reduce or eliminate one or more of subharmonic oscillation and total harmonic distortion from a converter input current during synchronous and asynchronous modes of operation. The converter may include one or more of a rectifier and an inverter.Type: ApplicationFiled: March 24, 2008Publication date: September 24, 2009Inventors: Pyboyina Prasad, Rajesh Ghosh, Damir Klikic
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Publication number: 20090231892Abstract: An uninterruptible power supply (UPS) system includes an AC power input configured to receive AC power from a single-phase AC power source or a multi-phase AC power source, a DC power source, an output circuit including a power output, a controllable switch configured to selectively couple at least one of the AC power input and the DC power source to the output circuit, and a processor coupled and configured to affect operation of the output circuit depending upon which of single-phase and multi-phase operation of the UPS is indicated.Type: ApplicationFiled: March 11, 2009Publication date: September 17, 2009Applicant: AMERICAN POWER CONVERSION CORPORATIONInventors: DAMIR KLIKIC, MIRZA A. BEG, MARK R. MELANSON, EDWARD KOTLYAR, JEFFREY B. SAMSTAD
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Publication number: 20090201703Abstract: Systems and methods are provided for distributing power to a load by controlling an uninterruptible power supply that has an inverter and a filter, where the filter has an inductor and a capacitor. The systems and methods apply a pulse width modulation control signal to the inverter, sample inverter inductor current and compare the inductor current to a reference current. A duty cycle of the pulse width modulation control signal is adjusted to drive the inductor current at a second sampling time to a value substantially equal to a reference current at a first sampling time. The systems and methods can filter harmonic distortion from output signals and control uninterruptible power supply output.Type: ApplicationFiled: February 7, 2008Publication date: August 13, 2009Inventors: Damir Klikic, Pyboyina Msvvsv Prasad, Rajesh Ghosh, Mahima Agrawal
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Patent number: 7521823Abstract: An uninterruptible power supply (UPS) system includes an AC power input configured to receive AC power from a single-phase AC power source or a multi-phase AC power source, a DC power source, an output circuit including a power output, a controllable switch configured to selectively couple at least one of the AC power input and the DC power source to the output circuit, and a processor coupled and configured to affect operation of the output circuit depending upon which of single-phase and multi-phase operation of the UPS is indicated.Type: GrantFiled: July 17, 2007Date of Patent: April 21, 2009Assignee: American Power Conversion CorporationInventors: Damir Klikic, Mirza A. Beg, Mark R. Melanson, Edward Kotlyar, Jeffrey B. Samstad
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Publication number: 20080061628Abstract: At least one aspect is directed to an uninterruptible power supply that includes a first input having an input line connection and an input neutral connection to receive a first input voltage from a first voltage source, a second input to receive a second input voltage from a second voltage source, and a boost circuit configured to provide a positive output DC voltage with respect to the input neutral connection and a negative output DC voltage with respect to the input neutral connection in both a line mode of operation and a backup mode of operation. The power supply also includes a first connection circuit to couple the first input to the boost circuit in the line mode of operation, and a second connection circuit to couple the second input to the boost circuit in the backup mode of operation, the second connection circuit being configured to isolate the second voltage source from the input neutral connection in the line mode of operation.Type: ApplicationFiled: September 8, 2006Publication date: March 13, 2008Applicant: American Power Conversion CorporationInventors: Henning Roar Nielsen, Ranganathan Gurunathan, Pothapragada Pavana Kumar, Damir Klikic
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Publication number: 20080042491Abstract: An uninterruptible power supply (UPS) system includes an AC power input configured to receive AC power from a single-phase AC power source or a multi-phase AC power source, a DC power source, an output circuit including a power output, a controllable switch configured to selectively couple at least one of the AC power input and the DC power source to the output circuit, and a processor coupled and configured to affect operation of the output circuit depending upon which of single-phase and multi-phase operation of the UPS is indicated.Type: ApplicationFiled: July 17, 2007Publication date: February 21, 2008Applicant: AMERICAN POWER CONVERSION CORPORATIONInventors: DAMIR KLIKIC, MIRZA BEG, MARK MELANSON, EDWARD KOTLYAR, JEFFREY SAMSTAD
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Patent number: 7259477Abstract: An uninterruptible power supply (UPS) system includes an AC power input configured to receive AC power from a single-phase AC power source or a multi-phase AC power source, a DC power source, an output circuit including a power output, a controllable switch configured to selectively couple at least one of the AC power input and the DC power source to the output circuit, and a processor coupled and configured to affect operation of the output circuit depending upon which of single-phase and multi-phase operation of the UPS is indicated.Type: GrantFiled: August 15, 2003Date of Patent: August 21, 2007Assignee: American Power Conversion CorporationInventors: Damir Klikic, Mirza A. Beg, Mark R. Melanson, Edward Kotlyar, Jeffrey B. Samstad
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Publication number: 20050036248Abstract: An uninterruptible power supply (UPS) system includes an AC power input configured to receive AC power from a single-phase AC power source or a multi-phase AC power source, a DC power source, an output circuit including a power output, a controllable switch configured to selectively couple at least one of the AC power input and the DC power source to the output circuit, and a processor coupled and configured to affect operation of the output circuit depending upon which of single-phase and multi- phase operation of the UPS is indicated.Type: ApplicationFiled: August 15, 2003Publication date: February 17, 2005Applicant: American Power Conversion CorporationInventors: Damir Klikic, Mirza Beg, Mark Melanson, Edward Kotlyar, Jeffrey Samstad
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Publication number: 20010011845Abstract: A power supply system has a power input to receive input power from a power source, a power output to provide output power to a load, at least one battery module having a battery output that provides battery power, at least one power module coupled to the power input to receive the input power, coupled to the battery output to receive the battery power and coupled to the power output to provide the output power, a controller, coupled to the at least one power module, constructed and arranged to monitor and control the output power from the at least one power module, and a redundant controller, coupled to the at least one power module and to the controller, constructed and arranged to provide redundant monitoring and controlling of the output power from the at least one power module.Type: ApplicationFiled: December 22, 2000Publication date: August 9, 2001Inventors: James M. Simonelli, Damir Klikic, Michael J. Ingemi, Donald L. Charlantini, David A. Colucci
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Patent number: 6201319Abstract: A power supply system has a power input to receive input power from a power source, a power output to provide output power to a load, at least one battery module having a battery output that provides battery power, at least one power module coupled to the power input to receive the input power, coupled to the battery output to receive the battery power and coupled to the power output to provide the output power, a controller, coupled to the at least one power module, constructed and arranged to monitor and control the output power from the at least one power module, and a redundant controller, coupled to the at least one power module and to the controller, constructed and arranged to provide redundant monitoring and controlling of the output power from the at least one power module.Type: GrantFiled: August 26, 1999Date of Patent: March 13, 2001Assignee: American Power ConversionInventors: James M. Simonelli, Damir Klikic, Michael J. Ingemi, Donald L. Charlantini, David A. Colucci
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Patent number: 5982652Abstract: A power supply system has a power input to receive input power from a power source, a power output to provide output power to a load, at least one battery module having a battery output that provides battery power, at least one power module coupled to the power input to receive the input power, coupled to the battery output to receive the battery power and coupled to the power output to provide the output power, a controller, coupled to the at least one power module, constructed and arranged to monitor and control the output power from the at least one power module, and a redundant controller, coupled to the at least one power module and to the controller, constructed and arranged to provide redundant monitoring and controlling of the output power from the at least one power module.Type: GrantFiled: July 14, 1998Date of Patent: November 9, 1999Assignee: American Power ConversionInventors: James M. Simonelli, Damir Klikic, Michael J. Ingemi, Donald L. Charlantini, David A. Colucci