Load Transfer Without Paralleling Sources Patents (Class 307/70)
  • Patent number: 10755549
    Abstract: A safety system for high-voltage electrical cabinetry provides active visual and/or audible warnings during maintenance. Load monitors evaluate electrical loads of dedicated power circuits used by an existing automatic lighting system. Light and sound indicators present status information (e.g. indicating maintenance status or normal operating status) to persons in signaling areas based on whether the evaluated electrical loads indicate that at least one lamp is turned on. A common power supply can be used to power the lighting circuit and the indicators. Bridge modules can also be used to monitor the electrical load for different group lighting circuits and report discrete group status information to a programmable logic controller while also sharing the group status information with the other bridge modules. In this case, the indicators present combined status information, for example, indicating a maintenance status if any lamps from any group is turned on.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: August 25, 2020
    Inventor: Florin Pop
  • Patent number: 10355490
    Abstract: A hybrid solar power generation system includes at least one solar panel, at least one first switch, a rectifying control unit, at least one rechargeable battery, a DC (Direct Current) to AC (Alternating Current) inverter, at least one second switch, and a DC to DC charging unit and a system control unit; wherein the system control unit controls the first switch and the second switch to form a grid-tied path and a standalone path, the solar panel supplies power to a utility grid by the grid-tied path, and the solar panel supplies power to an AC load by the standalone path.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: July 16, 2019
    Assignee: CYBER POWER SYSTEMS, INC.
    Inventors: Yu-Chih Lin, Cheng-Wei Chu, Shih-Heng Guo
  • Patent number: 10265948
    Abstract: A liquid ejecting apparatus includes an ejecting unit that includes a piezoelectric element which is displaced by a drive signal; a differential amplifier that outputs a control signal based on a source drive signal which is a source signal of the drive signal and a signal based on the drive signal; a pair of transistors that include a high-side transistor and a low-side transistor which are controlled based on the control signal and outputs the drive signal from an output terminal; a selector that selects one of the high-side transistor and the low-side transistor and supplies the control signal to the selected transistor; a first resistance element for pulling up the output terminal; and a second resistance element for pulling down the output terminal. The first resistance element or the second resistance element has a variable resistance value.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: April 23, 2019
    Assignee: Seiko Epson Corporation
    Inventor: Akira Abe
  • Patent number: 10003305
    Abstract: An apparatus and method for improving the efficiency of a power supply modulator for modulating a supply voltage of a power amplifier are provided. The apparatus for generating a supply voltage includes a Switching Mode Power Supplier (SMPS) module for generating a current of a power supply signal, and a linear regulator for generating a source current for supplementing an insufficient amount of the current generated by the SMPS module and a sink current for eliminating an excessive amount of the current generated by the SMPS module. The SMPS module generates the current of the power supply signal by selecting at least one of a plurality of power supplies that have different voltages according to a voltage level of an input signal of the SMPS module.
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: June 19, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Bok-Ju Park, Dong-Ki Kim, Ji-Seon Paek
  • Patent number: 9906043
    Abstract: The disclosure provides a power supply device including an input connector, a direct current (DC) processing unit, and an alternating current (AC) processing unit. The input connector obtains an AC power from an AC power supply and transmits the AC power to the DC processing unit and AC processing unit. The DC processing unit converts the AC power to a DC power, and converts the DC power to a plurality of DC voltages. The AC processing unit converts the AC power provided by the power supply to a plurality of AC voltages. An electronic device including the power supply device is also provided.
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: February 27, 2018
    Assignees: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Kang Wu, Guo-Yi Chen
  • Patent number: 9281690
    Abstract: A tactical smart grid system and method includes a plurality of energy generators and a plurality of loads, where the loads require energy from at least some of the energy generators. A plurality of interface units are provided, where each energy generator and load are connected to one of the plurality of interface units. Each of the interface units including a controller to thereby provide distributed intelligence and distributed system control, thereby removing the requirement of a centrally controlled system.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: March 8, 2016
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Craig Eldershaw, David G. Duff
  • Patent number: 9225188
    Abstract: [Problem] To provide a charging system that levels the amount of grid power that is used, and that is capable of reducing power rates, even if charging has been frequently conducted without limiting the time zones in which charging is conducted. [Solution] A charging system is provided with: a storage unit that is charged by consuming grid power supplied by a power company, and that supplies the stored power through discharge; and a charging unit that charges batteries by consuming power supplied by grid power and the storage unit. Power companies set a power rate that is higher the greater the maximum value of the amount of power supplied for each unit of time is. Furthermore, at least a single charge carried out by the charging unit is carried out over two units of time, and the storage unit supplies power to the charging unit in at least one unit of time other than said two units of time.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: December 29, 2015
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Atsushi Suyama, Toshiya Iwasaki, Atsushi Shimizu, Hirotsugu Murashima, Jun Yamasaki
  • Patent number: 8860251
    Abstract: A power supply system with an automatic transfer function includes a main-power-loop apparatus, a backup-power-loop apparatus, and a control unit. The main-power-loop apparatus has a first primary relay switch and a first SCR switch. The backup-power-loop apparatus has a second primary relay switch and a second SCR switch. The control unit turns on the first primary relay switch and the first SCR switch when a main power source can normally supply power, thus supplying power to a load via the main-power-loop apparatus by the main power source. The control unit turns on the second primary relay switch and the second SCR switch when the main power source cannot normally supply power, thus supplying power to the load via the backup-power-loop apparatus by a backup power source.
    Type: Grant
    Filed: January 3, 2012
    Date of Patent: October 14, 2014
    Assignee: Delta Electronics, Inc.
    Inventors: Hung-Chieh Lin, Chien-Chih Chan, Hau-Ju Chu, Hsin-Chan Yang, Kun-Liang Shih
  • Patent number: 8766479
    Abstract: A plurality of generators can be connected in parallel to a common electrical bus. Each generator has a controller that regulates the voltage and frequency of the electricity being produced. Before a given generator connects to the electrical bus, its controller senses whether electricity is present on the bus and if not, the connection is made. Otherwise, the controller synchronizes the electricity being produced to the electricity is present on the bus before the connection occurs. The controller in each generator may also implement a load sharing function which ensures that the plurality of generators equitably share in providing the total amount of power demanded by the loads. The load sharing can be accomplished by controlling the generators to operate a substantially identical percentages of their individual maximum power generation capacity.
    Type: Grant
    Filed: September 1, 2010
    Date of Patent: July 1, 2014
    Assignee: Kohler Co.
    Inventors: Douglas W. Dorn, Isaac S. Frampton
  • Patent number: 8670872
    Abstract: Aspects of the invention are directed to power distribution systems and methods for distributing power from a primary power source and a backup power source to a load. In one particular aspect, a power distribution system includes a first input to receive input power from the primary power source, a second input to receive input power from the backup power source, an output that provides output power from at least one of the primary power source and the backup power source, a first switch operatively coupled to the first input and the output and operative to selectively couple the first input to the output, a second switch operatively coupled to the second input and the output and operative to selectively couple the second input to the output, and a controller operatively coupled to the first switch and to the second switch and configured to control the first switch and the second switch to provide an electrical interlock.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: March 11, 2014
    Assignee: Schneider Electric IT Corporation
    Inventors: Neil Rasmussen, William Ziegler, David A. Colucci
  • Patent number: 8546977
    Abstract: Systems and methods of voltage based switching of a power supply system current are disclosed. In one embodiment, a power supply system includes a power bus to supply electrical power to a system load. A power supply is coupled to the power bus. The power supply provides current to the power bus and generates a voltage ?. In addition, the system includes an additional power supply coupled to the power bus. The additional power supply generates a voltage ? that is lower than the voltage ?. An oring module restricts the additional power supply from providing current to the power bus, until a power bus voltage ? is greater than a threshold voltage.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: October 1, 2013
    Assignee: LSI Corporation
    Inventor: Radhakrishna Togare
  • Patent number: 8491074
    Abstract: An ejection head driving circuit that supplies a driving voltage waveform to an ejection head has ejection nozzles that cause fluid to be ejected. A target voltage waveform output unit outputs a target voltage waveform to the ejection head. Power source units generate electric power at different voltage values. Negative feedback control units supply electric power from the respective power source units to the ejection head and perform a negative feedback control of the voltage values so that the voltage value to be applied to the ejection head matches the target voltage waveform. A power source connecting unit selects one of the power source units on the basis of the voltage value applied to the ejection head or the voltage value of the target voltage waveform, connects the selected power source unit to the ejection head, and disconnects the remaining power source units from the ejection head.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: July 23, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Shinichi Miyazaki, Katsunori Yamazaki
  • Patent number: 8456806
    Abstract: An electrical panelboard enclosure includes an enclosure housing with an interior equipment chamber accessible by way of a service entrance door. A service panel is adapted for connection to a main power source in order to receive main power therefrom. A power supply is operatively connected to receive main power from the service panel and deliver it to a load. The power supply is also adapted for connection to a backup power source in order to receive backup power therefrom and deliver it to the load in the event of a main power cutoff. A load disconnector is operatively connected between the power supply and the load. The load disconnector is manually operable to disconnect the load from the power supply to prevent the power supply from delivering either main or backup power to the load.
    Type: Grant
    Filed: January 8, 2011
    Date of Patent: June 4, 2013
    Assignee: Diversified Control, Inc.
    Inventors: Michael R. Cosley, Aron J. King, David H. Halik
  • Patent number: 8288890
    Abstract: This invention creates a simple, low cost mechanical transfer switch (called Gen/Safe) which provides users the ability to connect nearly any portable household generator to supply whole house power (to the limit of the particular generator) in the event of an emergency outage. Installed by the utility in less than five minutes, the switch provides visual confirmation of utility isolation while still allowing user supplied power not only from emergency sources, but also allows PV, wind, and other on-site power to operate normally to supply the home directly without interruption when possible. This connection is also suitable as an ongoing utility connection for user generated alternate energy power systems while providing an additional utility safety isolation factor for alternate power sources which must shut down when utility power fails; (to protect repair personnel).
    Type: Grant
    Filed: January 4, 2010
    Date of Patent: October 16, 2012
    Inventor: Gordon W. Young
  • Publication number: 20120181872
    Abstract: A backup power management system connectable to a primary power source and a secondary power source, and a method of operating the same. The system includes a single controller that is connected to both a first transfer switch contactor and a second transfer switch contactor. Both the primary power source and a secondary power source are broken into two separate output supplies. The two separate output supplies from the primary power source and the secondary power source are each provided to one of the first and second transfer switch contactors. The single controller sends signals to the first and second transfer switch contactors to control the movement of the contactors between first and second positions. In this manner, the single controller controls both the first transfer switch contactor and the second transfer switch contactor.
    Type: Application
    Filed: January 18, 2011
    Publication date: July 19, 2012
    Applicant: BRIGGS & STRATTON CORPORATION
    Inventors: Sie Teong Lim, Robert Jeffery Hurd, JR., Kenny J. Stair, Brandon Michael Batzler
  • Patent number: 8212405
    Abstract: Methods, systems, and apparatuses for alternate power delivery are provided. A metering assembly includes a power meter module. The power meter module includes a power control module and a power monitor. The power control module is coupled to a transfer switch that receives both primary power and alternate power. The transfer switch has an output coupled to an electrical circuit load. The power control module is configured to receive a request from the transfer switch for the alternate power to be supplied through the transfer switch to the electrical circuit load. The power control module is configured to enable the transfer switch to supply the alternate power to the electrical circuit load in response to the request. The power monitor is configured to determine an amount of the alternate power provided to the electrical circuit load.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: July 3, 2012
    Assignee: OfficePower, Inc.
    Inventors: John S. Pifer, Andrew J. Edwards
  • Patent number: 8180481
    Abstract: A system and method for operating an autoloop system on an electrical distribution system is provided. The system includes a first branch circuit having a first recloser and a midpoint recloser and a second branch circuit having a second feeder recloser and a midpoint recloser. A tie recloser is electrically coupled between the first branch circuit and the second branch circuit wherein the tie recloser closes only after a fault is detected. A master controller associated with the first and second branch circuits communicates with the reclosers of the first and second branch circuits. The master controller includes a processor for blocking a fast tripping function of a feeder recloser in response to the detection of a fault on the other branch circuit. The portion of a circuit where a fault is detected may be isolated to minimize the portion of the first and second branch circuits without power.
    Type: Grant
    Filed: August 6, 2008
    Date of Patent: May 15, 2012
    Assignee: Consolidated Edison Company of New York, Inc.
    Inventors: Paul V. Stergiou, William J. Harris
  • Publication number: 20110298288
    Abstract: An energy storage system includes a converter coupled between an inverter and both a power generator and a battery, thereby reducing the number of devices for circuit implementation and the size of a printed circuit board (PCB). The energy storage system is coupled to an electric power system that generates a system power, and the energy storage system includes a battery for generating a battery power and a converter coupleable to a power generator for generating an electric power and the battery in parallel, wherein the converter is configured to boost or drop a voltage of at least one of the electric power, the battery power, or the system power.
    Type: Application
    Filed: May 27, 2011
    Publication date: December 8, 2011
    Inventors: Sungchun Cho, Namsung Jung, Jungpil Park, Sungsoo Hong, Chungwook Roh, Sangkyoo Han
  • Publication number: 20110266875
    Abstract: A power supply system capable of inhibiting electricity loss and deterioration of each power supply device while realizing high stability in the case where electricity supply is performed by using a plurality of power supply devices is provided. A switching element corresponding to a power supply device having a higher inter-terminal voltage out of two power supply devices selectively becomes in ON state, and a switching element corresponding to a power supply device having a lower inter-terminal voltage selectively becomes in OFF state. Thereby, overload on a specific power supply device is prevented, and current flow between the different power supply devices is able to be prevented without generating needless electricity loss. Further, since electricity of the power supply device having a higher inter-terminal voltage is selectively outputted, variation between the respective power supply devices becomes allowable to some extent.
    Type: Application
    Filed: January 18, 2010
    Publication date: November 3, 2011
    Applicant: SONY CORPORATION
    Inventors: Jusuke Shimura, Yoshiaki Inoue
  • Patent number: 8049368
    Abstract: A load driving circuit that generates a desired voltage waveform to drive a load includes a target voltage waveform output section that outputs a target voltage waveform to be applied to the load. Power supply sections generate electrical power with voltage values different from each other. Negative feedback control sections between the power supply sections and the load supply electrical power from the corresponding power supply sections to the load and execute negative feedback control of a value of a voltage applied to the load for matching the voltage value and the target voltage waveform. A power supply connection section selects one of the power supply sections based on the value of the voltage applied to the load or the voltage value of the target voltage waveform and connects the selected power supply section to the load and disconnects the rest of the power supply sections from the load.
    Type: Grant
    Filed: June 11, 2009
    Date of Patent: November 1, 2011
    Assignee: Seiko Epson Corporation
    Inventors: Shinichi Miyazaki, Katsunori Yamazaki, Hiroyuki Yoshino, Kinya Matsuzawa, Shoichi Iino
  • Patent number: 8018091
    Abstract: A selectable backup power supply device for providing power to a real time clock (RTC) and a memory unit is disclosed. The device includes a backup battery, a first power outputting unit and a second power outputting unit, wherein the backup battery outputs a backup voltage, the first power outputting unit is connected to the backup battery and the RTC for receiving the backup voltage and outputting a first supply voltage to the RTC, and the second power outputting unit is connected to the backup battery and the memory unit, for receiving the backup voltage and, in accordance with a selection signal, outputting a second supply voltage to the memory unit or stopping the output of the second supply voltage.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: September 13, 2011
    Assignees: Universal Scientific Industrial (Shanghai) Co., Ltd., Universal Global Scientific Industrial Co., Ltd.
    Inventors: Huang-Chu Liu, Chun-Ta Wu
  • Patent number: 7982331
    Abstract: A transfer switch assembly is disclosed that includes a power switch device with a number engagement landings and a printed circuit board defining an opening bordered by a number of tabs. The tabs engage the landings as the switch device extends through the openings, and can be fastened together.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: July 19, 2011
    Assignee: Cummins Power Generation IP, Inc.
    Inventors: Jerry Murray, Allen B. Carney, Randall L. Bax, Elias Ayana, Roger Pautzke, John McCarthy
  • Patent number: 7956494
    Abstract: The invention provides a monolithic, highly integrated power supply circuit capable of providing various voltages for circuits on an expansion card, either from a main supply source or an auxiliary supply source. The monolithic power supply circuit preferably includes two switching converters, two low-drop-out regulators, a standby regulator, a reset circuit, and a control circuit. An associated method for providing various voltages via a monolithic power supply circuit is also disclosed.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: June 7, 2011
    Assignee: Agere Systems Inc.
    Inventors: Jan Amerom, Guus Jansen, Douglas D. Lopata, Marcel Slomp, Maarten Visee
  • Publication number: 20110080048
    Abstract: An electronic assembly with two battery units includes a system module provided with a preset threshold value and a parallel circuit. The parallel circuit is coupled electrically to the system module, and includes first and second power diverter circuits. Each of first and second power diverter circuit consists of a diode member coupled electrically to a respective battery unit and the system module and an operation switch that is coupled electrically to the diode member in parallel manner and that is coupled electrically to the respective battery unit and the system module in such a manner that a normal bias voltage is existed between the respective battery unit and the system module.
    Type: Application
    Filed: December 29, 2009
    Publication date: April 7, 2011
    Applicant: GIGA-BYTE TECHNOLOGY CO., LTD.
    Inventors: Yih-Neng LIN, Rain-Ted HWANG
  • Patent number: 7868483
    Abstract: A power management system includes a power management unit (PMU) and a current sensor. The PMU is operable for controlling a first power source and a second power source. The second power source is operable for being charged by the first power source via a charging path. The current sensor has a first terminal coupled to the first power source and the second power source and has a second terminal coupled to the second power source via the charging path. The current sensor is operable for sensing a first current flowing from the first power source through the current sensor and for sensing a second current flowing from the second power source through the current sensor.
    Type: Grant
    Filed: January 18, 2008
    Date of Patent: January 11, 2011
    Assignee: O2Micro, Inc.
    Inventors: Chun Lu, Xinhe Su
  • Patent number: 7759823
    Abstract: To provide a switching device capable of a switch-controlling a voltage source regardless of voltage changes in the voltage source to be switched and the voltage source employed for switch control. A switching path 61 includes, between the input terminal 1 and output terminal 4 for a voltage source, a series connection of the source or drain electrodes of PMOS transistors 10a and 10b connected to their back-gate electrode. A driving circuit has an NMOS transistor 11a having a load resistor 12a at its drain electrode and NMOS transistor 11b having a load resistor 12b at its drain electrode, which are connected to the gate electrodes of the PMOS transistors, respectively and receives the output from the logic inverter 14 for the switching control.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: July 20, 2010
    Assignee: Panasonic Corporation
    Inventors: Hideyuki Kihara, Katsumi Nagumo
  • Publication number: 20100038966
    Abstract: An automatic transfer switch apparatus for use with a stand-alone generator, for supplying emergency power to a residence or small business. The automatic transfer switch apparatus is configured to sense a utility line failure, start up and stabilize the generator, and switch over the household circuits from the utility to the generator, and switch back when the utility recovers. The transfer switches incorporate motor-driven switch interlock mechanisms in several embodiments, as well as various operational features.
    Type: Application
    Filed: July 30, 2009
    Publication date: February 18, 2010
    Applicant: Gen-Tran Corporation
    Inventor: Donald B. Espeut, JR.
  • Patent number: 7646113
    Abstract: A method is provided for connecting a 110 V genset to a transfer switch feeding a 220 V service entrance such that all 220 V loads are automatically blocked out and all 110 V circuits are accessed. The method includes wiring of the genset to the transfer switch such that the two hot 220 V terminals on the genset entrance side of the transfer switch are connected together and wired to the hot 110 V side of the genset. The neutral lead of the transfer switch is connected to the neutral side of the genset, as per normal practice.
    Type: Grant
    Filed: September 13, 2006
    Date of Patent: January 12, 2010
    Assignee: Cummins Power Generation, Inc.
    Inventor: Paul H. Plahn
  • Publication number: 20090251007
    Abstract: A retrofit module electrically connects to a device's battery terminals, where an original main battery would otherwise connect to the device, and a hot-swappable battery electrically connects to the retrofit module, thereby retrofitting the device for operation with hot-swappable batteries, without shutting down the device to swap the batteries. When a charged hot-swappable battery is connected to the retrofit module, the retrofit module powers the device from the hot-swappable battery. The retrofit module includes a bridge battery and a circuit that charges the bridge battery from the hot-swappable battery and that provides power to the device from the bridge battery while the hot-swappable battery is replaced. The retrofit module may include a releasable structure that maintains the module in contact with the device's battery terminals, even after the hot-swappable battery has been removed.
    Type: Application
    Filed: March 18, 2009
    Publication date: October 8, 2009
    Inventors: William L. Adams, Mark Hamilton
  • Patent number: 7595569
    Abstract: The invention provides a monolithic, highly integrated power supply circuit capable of providing various voltages for circuits on an expansion card, either from a main supply source or an auxiliary supply source. The monolithic power supply circuit preferably includes two switching converters, two low-drop-out regulators, a standby regulator, a reset circuit, and a control circuit. An associated method for providing various voltages via a monolithic power supply circuit is also disclosed.
    Type: Grant
    Filed: February 17, 2005
    Date of Patent: September 29, 2009
    Assignee: Agere Systems Inc.
    Inventors: Jan Amerom, Guus Jansen, Douglas D. Lopata, Marcel Slomp, Maarten Visee
  • Patent number: 7579716
    Abstract: A power storage device includes an alternating current (AC) power source, a field effect transistor (FET), a capacitor bank, a direct current (DC) fixing heater, a step-down chopper circuit, and an output control unit. The FET switches between a first path and a second path to supply power from the AC power source in combination with a diode and an IGBT. The capacitor bank is arranged on the first path, and includes capacitor cells. The DC fixing heater is arranged on the second path. The step-down chopper circuit is arranged on the first path, and changes a voltage value of power supplied from the AC power source. The output control unit controls, when power is supplied to the first path, controls the step-down chopper circuit to change a voltage value based on a charging voltage of the capacitor cells.
    Type: Grant
    Filed: May 23, 2007
    Date of Patent: August 25, 2009
    Assignee: Ricoh Company, Limited
    Inventors: Naoki Sato, Masayuki Ohtani, Masahide Nakaya, Hideo Kikuchi
  • Publication number: 20090039708
    Abstract: An electrical circuit contains volatile states that are lost without continued application of power to circuit elements to preserve their volatile states. A first power source in the circuit provides power to the volatile state circuit for holding and preserving their volatile states. A power selection circuit is coupled to the circuit elements and has a plurality of selectable modes. A first mode of operation of the power selection circuit is selected when the circuit elements are to be operated at a first power level via the first power source which constitutes a first mode of operation. A second mode of operation is selected when the volatile state circuit elements are to be operated under a condition where the first power source is inactivated, such as, for example, during a circuit backup or standby operation.
    Type: Application
    Filed: August 8, 2008
    Publication date: February 12, 2009
    Inventor: Gary V. Zanders
  • Patent number: 7418314
    Abstract: Aspects of the invention are directed to power distribution systems and methods for distributing power from a primary power source and a backup power source to a load. In one particular aspect, a power distribution system includes a first input to receive input power from the primary power source, a second input to receive input power from the backup power source, an output that provides output power from at least one of the primary power source and the backup power source, a first switch operatively coupled to the first input and the output and operative to selectively couple the first input to the output, a second switch operatively coupled to the second input and the output and operative to selectively couple the second input to the output, and a controller operatively coupled to the first switch and to the second switch and configured to control the first switch and the second switch to provide an electrical interlock.
    Type: Grant
    Filed: November 3, 2006
    Date of Patent: August 26, 2008
    Assignee: American Power Conversion Corporation
    Inventors: Neil Rasmussen, William Ziegler, David A. Colucci
  • Patent number: 7365964
    Abstract: A modular power distribution unit (PDU) for supplying electric power to attached equipment in environments such as data centers, computer rooms, and communication centers, where power requirements for attached equipment may vary. The power distribution unit includes a frame and one or more user-replaceable power modules, which fit into slots in the frame. Each power module provides one of more plug receptacles for attaching equipment to provide power thereto. The power modules are available in a variety of receptacle types, receptacle numbers, and power rating configurations to accommodate various equipment in a particular environment, as needed. The frame includes an internal connector panel for distributing power from a power source to the power modules when they are inserted in the frame. The power modules may be removed, installed, and interchanged in the frame without interrupting power to other power modules or to the power distribution unit.
    Type: Grant
    Filed: April 4, 2005
    Date of Patent: April 29, 2008
    Inventor: William F. Donahue, IV
  • Publication number: 20080018174
    Abstract: A power control apparatus to control power supplied to a load with a predetermined desired voltage level includes a first switch to selectively output a first power to the load, a voltage drop of the first power being less than a predetermined value to meet the desired voltage level, a second switch to selectively output a second power which is different from the first power to the load, a voltage drop of the second power being less than a predetermined value to meet the desired voltage level, and a controller to control the first switch and the second switch to output one of a higher input voltage value from the first power and the second power to the load.
    Type: Application
    Filed: June 1, 2007
    Publication date: January 24, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Kyeong-taeg Yang
  • Patent number: 7274974
    Abstract: An independent automatic shedding system that automatically allows any combination of loads to powered under limited power availability (such as a standby power source) without overloading the generator or rewiring, while contributing to the stability of the power grid. A motorized disconnection actuation mechanism under control of a controller disconnects or recloses the contacts of a branch circuit breaker. A sensor detects the presence or absence of a power source and the type of power source, which is classified according to its type. A power source classification program is executed by the controller that interprets the sensor data and causes disconnection or reclosing of the disconnection actuation mechanism depending on a desired status (ON or OFF) of the branch circuit breaker when standby power is available. Conventional circuit protection is provided an optional advanced circuit protection such as ground or arc fault circuit interruption.
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: September 25, 2007
    Assignee: Square D Company
    Inventors: Scott R. Brown, Gary M. Kuzkin
  • Patent number: 7183669
    Abstract: There are provided monitors which sense a magnitude of power (and/or energy) being consumed by a facility and which sense a magnitude of power (and/or energy) being produced by at least one energy-producing system. There are provided facilities comprising at least one main panel bus, at least one external power line, at least one energy-producing system, at least one critical load sub-panel bus and at least one monitor which senses a magnitude of power (and/or energy) being consumed by the facility and a magnitude of power (and/or energy) being produced by the at least one energy-producing system. There are provided methods of monitoring power (and/or energy) consumed and power (and/or energy) produced in a facility, and devices which display magnitude of power (and/or energy) being consumed and magnitude of power (and/or energy) being produced in a battery.
    Type: Grant
    Filed: February 11, 2004
    Date of Patent: February 27, 2007
    Assignee: Heritage Power LLC
    Inventors: Jason Schripsema, Jerome S. Culik, Mark Mrohs, Allen Barnett
  • Patent number: 7170197
    Abstract: The invention provides a switching converter comprising as few as two high-side switching transistors and a low-side rectifying device, along with a control circuit. The switching converter is capable of operating from a main supply source or an auxiliary supply source. The invention further includes a method for producing a regulated voltage from a first supply voltage and a second supply voltage via the two high-side switching transistors and a low-side rectifying device.
    Type: Grant
    Filed: February 17, 2005
    Date of Patent: January 30, 2007
    Assignee: Agere Systems Inc.
    Inventor: Douglas D. Lopata
  • Patent number: 7142950
    Abstract: Aspects of the invention are directed to power distribution systems and methods for distributing power from a primary power source and a backup power source to a load. In one particular aspect, a power distribution system includes a first input to receive input power from the primary power source, a second input to receive input power from the backup power source, an output that provides output power from at least one of the primary power source and the backup power source, a first switch operatively coupled to the first input and the output and operative to selectively couple the first input to the output, a second switch operatively coupled to the second input and the output and operative to selectively couple the second input to the output, and a controller operatively coupled to the first switch and to the second switch and configured to control the first switch and the second switch to provide an electrical interlock.
    Type: Grant
    Filed: May 28, 2004
    Date of Patent: November 28, 2006
    Assignee: American Power Conversion Corporation
    Inventors: Neil Rasmussen, William Ziegler, David A. Colucci
  • Patent number: 7141892
    Abstract: A power supply method and apparatus of a line interactive UPS utilizes a bi-directional AC/AC power converter in association with the AC delta control concept. When the line voltage coupled to the AC/AC power convert exceeds high/low statuses, the UPS is operated in a line voltage conversion mode, wherein the AC/AC power converter supplies a voltage to compensated the line voltage based on the stability of the line voltage, and then the compensated stable voltage is further provided to the load so as to perform the voltage boost (step-up) and/or voltage buck (step-down).
    Type: Grant
    Filed: August 20, 2002
    Date of Patent: November 28, 2006
    Assignee: Phoenixtec Power Co., Ltd.
    Inventors: Guo-Feng Dai, Norman Day
  • Patent number: 7057309
    Abstract: An electrical apparatus including an AC adapter 51; a battery 52 that repeats charging and discharging to power the apparatus; an AC/DC enable circuit 61 that switches between stop and start of power source from the AC adapter 51 to the body; a charger utilization circuit 62 that charges an output capacitor (Cout) of a charger 60 while the power source from the AC adapter 51 stops; and a battery detection circuit 63 that detects disconnection of the battery 52. If the battery 52 is disconnected from the body and the battery detection circuit 63 detects the disconnection while the power source from the AC adapter 51 stops and the body is powered by the battery 52, the AC/DC enable circuit 61 starts power source to the body while the body is powered by the output capacitor (Cout).
    Type: Grant
    Filed: October 29, 2002
    Date of Patent: June 6, 2006
    Assignee: Lenovo ( Singapore) Pte. Ltd.
    Inventor: Shigefumi Odaohhara
  • Patent number: 7019416
    Abstract: A power source circuit capable of improving an efficiency of using energy of a chemical battery cell by responding suitably to an intermittent change in a load current, by during a load burst period in an odd-numbered order, a load is driven by power accumulated in a first power storing section and, during a load burst period in an even-numbered order, a load is driven by power accumulated in a second power storing section. The chemical battery cell does not discharge during the load burst period. Therefore, an amount of a voltage having dropped due to an internal impedance of a power supplying section becomes small and, as a result, when the power source circuit is applied to the electronic device which becomes inoperable due to a temporary voltage drop in the power source, an operational life of the power supplying section is made longer.
    Type: Grant
    Filed: September 17, 2002
    Date of Patent: March 28, 2006
    Assignee: NEC Tokin Corporation
    Inventor: Hiroshi Sasaki
  • Patent number: 6937461
    Abstract: A modular power distribution unit (PDU) for supplying electric power to attached equipment in environments such as data centers, computer rooms, and communication centers, where power requirements for attached equipment may vary. The power distribution unit includes a frame and one or more user-replaceable power modules, which fit into slots in the frame. Each power module provides one of more plug receptacles for attaching equipment to provide power thereto. The power modules are available in a variety of receptacle types, receptacle numbers, and power rating configurations to accommodate various equipment in a particular environment, as needed. The frame includes an internal connector panel for distributing power from a power source to the power modules when they are inserted in the frame. The power modules may be removed, installed, and interchanged in the frame without interrupting power to other power modules or to the power distribution unit.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: August 30, 2005
    Inventor: William F. Donahue, IV
  • Patent number: 6864600
    Abstract: There is disclosed an apparatus and method for providing multiple power supply voltages to an integrated circuit. In an integrated circuit of the type comprising at least two power supply domains in which each power supply domain comprises at least one module powered by the same voltage level, the apparatus and method of the present invention blocks an output signal in a first power supply domain from being sent to a second power supply domain when the second power supply domain is in a low power mode. The apparatus and method of the present invention also blocks an output signal from a first power supply domain from being received in a second power supply domain when the first power supply domain is in a low power mode. Power sense cells are used to determine the status of power supply domains and logic circuits are used to block undesired signals. The present invention also properly synchronizes clock signals when power supply domains are activated or inactivated.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: March 8, 2005
    Assignee: National Semiconductor Corporation
    Inventor: Aviv Malinovitch
  • Publication number: 20040256916
    Abstract: A switch assembly and method includes a heat sink with two switch modules coupled thereto. Both of the switch modules are used in switching operations to make use of the entire heat sink, providing improved heat dissipation. The switch modules each have first and second switch devices, with each switch device having a gate terminal. A source voltage is applied to the switching modules and a positive portion of the source voltage is conducted through one switch device of the first switching module. A negative portion of the source voltage is conducted through one of the switching devices of the second switching module.
    Type: Application
    Filed: November 18, 2003
    Publication date: December 23, 2004
    Applicant: LIEBERT CORPORATION
    Inventors: Gary A. Reichle, Robert W. Baker
  • Patent number: 6825578
    Abstract: An automatic transfer switch system controls switching of power from a main source (utility power) to a backup source (generator) by using a state machine controller and low cost relay switches housed in a single electrical panel. The low power automated transfer switch system is well-suited for residential use and is less expensive and easier to install than conventional automatic transfer switches. The key to a low cost transfer switch is delivering power with low cost relays. This is accomplished by employing relay drive techniques that enable these devices to survive rigorous standards compliance testing. Preferably, the state machine controller measures utility and generator source compliance using an optical coupling arrangement, rather than a transformer. The automated transfer switch disconnects the utility and generator means through a circuit breaker providing for fast protection. The relay drive techniques disclosed provide a form of an electrical interlock.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: November 30, 2004
    Inventor: Joseph Perttu
  • Publication number: 20040150267
    Abstract: A power supply with integrated DC supply for peripheral devices, comprises a power conditioner to convert AC electrical power to DC, and to regulate the DC power to produce a plurality of DC voltages, and receptacles for plugging in to receive said DC voltages. A step-down transformer and a receptacle for lowered-voltage AC power is described. Additionally, a universal cable is described, which carries a variety of DC or lowered voltage AC power and mates with the power supply; the cable can be daisy-chained to plug in several devices to the power supply to tap the variety of DC voltages and lowered-voltage AC power.
    Type: Application
    Filed: January 16, 2004
    Publication date: August 5, 2004
    Inventor: Gary W. Ferguson
  • Patent number: 6664654
    Abstract: A method of controlling a permanent magnet turbogenerator/motor includes providing a protected load connected in parallel with the turbogenerator/motor through a pulse width modulated inverter configured in a first operating mode to supply controlled current from the turbogenerator/motor to a utility electrical power source, and selectively connected to the utility electrical power source through an isolation device, monitoring the utility electrical power source, and automatically disconnecting the protected load from the utility electrical power source while reconfiguring the pulse width modulated inverter in a second operating mode to supply controlled voltage to the protected load when a fault is detected in the utility electrical power source.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: December 16, 2003
    Assignee: Capstone Turbine Corporation
    Inventors: Simon R. Wall, Joel B. Wacknov, Mark G. Gilbreth, Ken Keller
  • Patent number: 6639331
    Abstract: A system for connecting one of a plurality of parallel connected generator sets to a common bus. The system includes a separate module associated with each of the plurality of generator sets. When a control module receives a ready-to-load signal from the generator set, each of the control modules performs a similar connection method which determines which of the modules will send a first-start command to its associated generator.
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: October 28, 2003
    Assignee: Onan Corporation
    Inventor: Mark H. Schultz
  • Patent number: RE39710
    Abstract: A power system (8) is provided for economically supplying uninterrupted electrical power to one or more critical loads (14). One or more fuel cell power plants (18) provide one substantially continuous source of power, and a utility grid (10) provides another source of power. The fuel cell power plants (18) are adapted to be, and are, normally substantially continuously connected and providing power to, the critical load(s) (14). A rapidly-acting static switch (19) selectively connects and disconnects and reconnects the grid power supply (10) to the critical load(s) (14) and with the fuel cell power plant(s) (18) for abnormal and normal grid operation, respectively. A switch controller (49, 45) controls the state of the static switch (19) to connect the grid power source (10) with the critical load(s) (14) and the rapidly (less than 4 ms) make the disconnections and the reconnections.
    Type: Grant
    Filed: March 16, 2004
    Date of Patent: July 3, 2007
    Assignee: UTC Fuel Cells, LLC
    Inventors: Douglas Gibbons Young, Herbert C. Healy, Francis A. Fragola, Jr., Ricky M. Ross