Patents by Inventor Namwook Paik
Namwook Paik 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: 20120232712Abstract: A power reduction aggregation system for controlling and measuring power usage at a plurality of individual user locations which includes a plurality of power reduction controllers and a power reduction module. Each power reduction controller is disposed at one of the plurality of individual user locations and includes a controller module and an energy consumption module. The controller module is configured to selectively control power to a plurality of loads associated with each of the individual user locations. The energy consumption module is coupled to the controller module and is configured to determine energy reduction indicia associated with at least one of the plurality of loads. The power reduction module is communicatively coupled to each of the plurality of power reduction controllers and is configured to determine an aggregate energy reduction estimate by combining the energy reduction indicia determined by the plurality of power reduction controllers.Type: ApplicationFiled: May 16, 2012Publication date: September 13, 2012Applicant: AMERICAN POWER CONVERSION CORPORATIONInventor: Namwook PAIK
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Patent number: 8212402Abstract: Aspects of the invention are directed to systems and method for limiting losses in an uninterruptible power supply. In one aspect, the present invention provides an uninterruptible power supply (UPS) comprising an input to receive input power having an input voltage, an output to provide output power having an output voltage, a neutral line, an automatic voltage regulation (AVR) transformer coupled to the input and the output of the UPS and having an input, an output, a core and at least one switch controllably coupled to at least one of the core, the input and the output, and a means for isolating the core of the AVR transformer from the neutral line when the input voltage is substantially equal to a defined output voltage.Type: GrantFiled: January 27, 2009Date of Patent: July 3, 2012Assignee: American Power Conversion CorporationInventors: Fred William Rodenhiser, Vishwas Mohaniraj Deokar, Namwook Paik, Fang Sheng-Hsien
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Patent number: 8200370Abstract: A power reduction system includes a central server and a plurality of power reduction devices. The central server of the power reduction aggregation system includes: a network interface configured to transmit and receive information to and from a communication network; a power grid status module coupled to the network interface and configured to transmit a power status message to the network, via the network interface, toward at least two power reduction devices connected to the network; and a power savings compensation module configured to determine an aggregate compensation earned for providing an aggregate energy reduction induced by the at least two power reduction devices in response to receiving the power status message, and further configured to determine individual portions of the aggregate compensation associated with each of the at least two power reduction devices.Type: GrantFiled: December 4, 2008Date of Patent: June 12, 2012Assignee: American Power Conversion CorporationInventor: Namwook Paik
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Publication number: 20120126785Abstract: In one aspect, the invention provides a method for overcurrent sensing including; generating an analog output signal representative of a sensed AC current, generating a digital representation of the analog output signal using a plurality of discrete samples, determining those of the plurality of discrete samples having a substantially identical magnitude and estimating an amount of overcurrent in the sensed AC current by evaluating those of the plurality of discrete samples that have the substantially identical magnitude. In some embodiments, the substantially identical magnitude is a maximum magnitude represented by the digital representation.Type: ApplicationFiled: September 23, 2011Publication date: May 24, 2012Applicant: AMERICAN POWER CONVERSION CORPORATIONInventors: Namwook Paik, Vishwas M. Deokar
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Publication number: 20110291488Abstract: According to one aspect, embodiments of the invention provide a system for monitoring at least one circuit branch coupled to a power line, the system comprising at least one first module comprising a Current Transformer (CT) configured to be coupled to the at least one circuit branch and to produce a reference signal having a level related to a current level of the at least one circuit branch, a rectifier coupled to the CT and configured to produce a rectified reference signal, a capacitor coupled to the rectifier, and a first microcontroller coupled to the capacitor and the rectifier, wherein, the capacitor is configured to store energy from the rectified reference signal, and wherein, the first microcontroller is configured to be powered by the energy stored in the capacitor and to sample the rectified reference signal to determine the current level of the at least one circuit branch.Type: ApplicationFiled: May 28, 2010Publication date: December 1, 2011Inventors: Namwook Paik, Vishwas Mohaniraj Deokar, James H. Donalds
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Patent number: 8031455Abstract: In one aspect, the invention provides a system for protecting a plurality of circuits including a plurality of circuit protective devices wherein each circuit protective device includes a respective nominal current rating. According to one embodiment, the system includes current sensing circuitry configured to measure a current of each circuit protective device; and a controller configured to receive each of the measured currents. According to one embodiment, the controller is further configured to determine a ratio between a total current being carried by all of the circuit protective devices combined and a total nominal current rating of all of the circuit protective devices combined and employ the ratio to determine a modified nominal current rating of each circuit protective device, respectively.Type: GrantFiled: January 5, 2007Date of Patent: October 4, 2011Assignee: American Power Conversion CorporationInventors: Namwook Paik, Vishwas M. Deokar
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Publication number: 20100188066Abstract: Aspects of the invention are directed to systems and method for limiting losses in an uninterruptible power supply. In one aspect, the present invention provides an uninterruptible power supply (UPS) comprising an input to receive input power having an input voltage, an output to provide output power having an output voltage, a neutral line, an automatic voltage regulation (AVR) transformer coupled to the input and the output of the UPS and having an input, an output, a core and at least one switch controllably coupled to at least one of the core, the input and the output, and a means for isolating the core of the AVR transformer from the neutral line when the input voltage is substantially equal to a defined output voltage.Type: ApplicationFiled: January 27, 2009Publication date: July 29, 2010Applicant: American Power Conversion CorporationInventors: Fred William Rodenhiser, Vishwas Mohaniraj Deokar, Namwook Paik, Fang Sheng-Hsien
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Publication number: 20100145884Abstract: A power reduction aggregation system includes a central server and a plurality of power reduction devices. The central server of the power reduction aggregation system includes: a network interface configured to transmit and receive information to and from a communication network; a power grid status module coupled to the network interface and configured to transmit a power status message to the network, via the network interface, toward at least two power reduction devices connected to the network; and a power savings compensation module configured to determine an aggregate compensation earned for providing an aggregate energy reduction induced by the at least two power reduction devices in response to receiving the power status message, and further configured to determine individual portions of the aggregate compensation associated with each of the at least two power reduction devices.Type: ApplicationFiled: December 4, 2008Publication date: June 10, 2010Applicant: American Power Conversion CorporationInventor: Namwook Paik
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Publication number: 20100141046Abstract: A power reduction system includes a central server and a plurality of power reduction devices. The central server of the power reduction aggregation system includes: a network interface configured to transmit and receive information to and from a communication network; a power grid status module coupled to the network interface and configured to transmit a power status message to the network, via the network interface, toward at least two power reduction devices connected to the network; and a power savings compensation module configured to determine an aggregate compensation earned for providing an aggregate energy reduction induced by the at least two power reduction devices in response to receiving the power status message, and further configured to determine individual portions of the aggregate compensation associated with each of the at least two power reduction devices.Type: ApplicationFiled: December 4, 2008Publication date: June 10, 2010Applicant: American Power Conversion CorporationInventor: Namwook Paik
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Patent number: 7573156Abstract: According to one aspect of the invention, an uninterruptible power supply includes UPS circuitry, a power source adapted to couple to the UPS circuitry, a first contact, a second contact, and a third contact. The first contact, the second contact, and the third contact are adapted to couple the UPS circuitry to the power source. In a first stage of connection of the UPS circuitry and the power source, the first contact and the second contact are employed in a first circuit. In a second stage of connection of the UPS circuitry and the power source, the first contact and the third contact are employed in a second circuit, and the second contact and the third contact are employed in a third circuit.Type: GrantFiled: December 22, 2005Date of Patent: August 11, 2009Assignee: American Power Conversion CorporationInventors: Namwook Paik, Bruce Long
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Patent number: 7446437Abstract: At least one aspect is directed to a transfer switch including a first input to couple a first multiphase low voltage electrical supply to the transfer switch, and a second input to couple a second multiphase low voltage electrical supply to the transfer switch. The transfer switch also includes a first set of switches in electrical communication with the first input and a second set of switches in electrical communication with the second input. A control module monitors and controls operation of both the first set of switches and the second set of switches to detect a malfunction of any switches included in at least one of the first set of switches and the second set of switches and prevent the first input from being placed in electrical communication with the second input.Type: GrantFiled: July 22, 2005Date of Patent: November 4, 2008Assignee: American Power Conversion CorporationInventors: Namwook Paik, Jamie Donalds, Emanuel Landsman, Vishwas Deokar, Fred Rodenhiser, Steve Williams
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Publication number: 20080165461Abstract: In one aspect, the invention provides a system for protecting a plurality of circuits including a plurality of circuit protective devices wherein each circuit protective device includes a respective nominal current rating. According to one embodiment, the system includes current sensing circuitry configured to measure a current of each circuit protective device; and a controller configured to receive each of the measured currents. According to one embodiment, the controller is further configured to determine a ratio between a total current being carried by all of the circuit protective devices combined and a total nominal current rating of all of the circuit protective devices combined and employ the ratio to determine a modified nominal current rating of each circuit protective device, respectively.Type: ApplicationFiled: January 5, 2007Publication date: July 10, 2008Inventors: Namwook Paik, Vishwas M. Deokar
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Publication number: 20070145827Abstract: According to one aspect of the invention, an uninterruptible power supply includes UPS circuitry, a power source adapted to couple to the UPS circuitry, a first contact, a second contact, and a third contact. The first contact, the second contact, and the third contact are adapted to couple the UPS circuitry to the power source. In a first stage of connection of the UPS circuitry and the power source, the first contact and the second contact are employed in a first circuit. In a second stage of connection of the UPS circuitry and the power source, the first contact and the third contact are employed in a second circuit, and the second contact and the third contact are employed in a third circuit.Type: ApplicationFiled: December 22, 2005Publication date: June 28, 2007Applicant: American Power Conversion CorporationInventors: Namwook Paik, Bruce Long
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Patent number: 7202576Abstract: One embodiment of the invention provides a UPS including a precharge circuit and a battery pack sensor electrically coupled to the precharge circuit. The sensor senses the presence of an extra battery pack. The precharge circuit includes: a first precharge contact; a capacitor having first and second leads, the first lead electrically coupled to the first contact; a second precharge contact electrically coupled to the second lead of the capacitor; a current limiting circuit having first and second leads, the first lead of the current limiting circuit electrically coupled to the first lead of the capacitor; and a third precharge contact electrically coupled to the second lead of the current limiting circuit. The UPS can further include an enclosure having a housing and a battery connector integral to the housing, the battery connector adapted to receive the first, second and third precharge contacts.Type: GrantFiled: October 22, 2003Date of Patent: April 10, 2007Assignee: American Power Conversion CorporationInventors: Joseph Dechene, Michael Manganese, Namwook Paik, Andrew Chase, Michael Lysik
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Publication number: 20070018506Abstract: At least one aspect is directed to a transfer switch including a first input to couple a first multiphase low voltage electrical supply to the transfer switch, and a second input to couple a second multiphase low voltage electrical supply to the transfer switch. The transfer switch also includes a first set of switches in electrical communication with the first input and a second set of switches in electrical communication with the second input. A control module monitors and controls operation of both the first set of switches and the second set of switches to detect a malfunction of any switches included in at least one of the first set of switches and the second set of switches and prevent the first input from being placed in electrical communication with the second input.Type: ApplicationFiled: July 22, 2005Publication date: January 25, 2007Applicant: American Power Conversion CorporationInventors: Namwook Paik, Jamie Donalds, Emanuel Landsman, Vishwas Deokar, Fred Rodenhiser, Steve Williams
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Patent number: 6630751Abstract: Embodiments of the present invention are directed to an uninterruptible power supply for providing AC power to a load having a capacitive element.Type: GrantFiled: March 19, 2001Date of Patent: October 7, 2003Assignee: American Power ConversionInventors: Jeffrey Curtis, David E. Reilly, Kevin White, Namwook Paik
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Publication number: 20020030411Abstract: Embodiments of the present invention are directed to an uninterruptible power supply for providing AC power to a load having a capacitive element.Type: ApplicationFiled: March 19, 2001Publication date: March 14, 2002Inventors: Jeffrey Curtis, David E. Reilly, Kevin White, Namwook Paik
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Patent number: RE43177Abstract: At least one aspect is directed to a transfer switch including a first input to couple a first multiphase low voltage electrical supply to the transfer switch, and a second input to couple a second multiphase low voltage electrical supply to the transfer switch. The transfer switch also includes a first set of switches in electrical communication with the first input and a second set of switches in electrical communication with the second input. A control module monitors and controls operation of both the first set of switches and the second set of switches to detect a malfunction of any switches included in at least one of the first set of switches and the second set of switches and prevent the first input from being placed in electrical communication with the second input.Type: GrantFiled: April 16, 2010Date of Patent: February 14, 2012Assignee: American Power Conversion CorporationInventors: Namwook Paik, James Donalds, Emanuel Landsman, Vishwas Deokar, Fred Rodenhiser, Stephen G. Williams