Attainment Of Voltage, Frequency Or Phase Relationship Patents (Class 307/87)
  • Patent number: 11209469
    Abstract: A method includes performing by a processor: receiving a plurality of synchrophasor measurements of a power system signal associated with a time interval from a phasor measurement unit (PMU), each of the plurality of synchrophasor measurements including a phase angle, frequency value, and a timestamp associated with the synchrophasor measurement, determining a plurality of relative phase angles based on the plurality of phase angles, determining a correlation coefficient between the plurality of relative phase angles and a plurality of corresponding frequency values of the power system signal, and detecting an error in the plurality of timestamps based on the correlation coefficient; estimating the error in the plurality of timestamps based on the plurality of relative phase angles and the plurality of corresponding frequency values.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: December 28, 2021
    Assignees: UNIVERSITY OF TENNESSEE RESEARCH FOUNDATION, UT-BATTELLE, LLC
    Inventors: Yilu Liu, Wenpeng Yu, Wenxuan Yao
  • Patent number: 11203263
    Abstract: A system with a high-voltage battery and a coupling device that couples the high-voltage battery to a high-voltage onboard power supply system of a motor vehicle. The coupling device couples a positive pole and a negative pole with corresponding phases of the high-voltage power supply system. The coupling device includes a current measurement device that measures the current flowing between a first electrically conductive connection and a first interface and/or the current flowing between a second electrically conductive connection and a second interface, an actuating device, and at least one first semiconductor switch, as well as at least one second semiconductor switch, which is coupled between the second electrically conductive connection and the second interface. The first semiconductor switch includes a first control electrode and the second semiconductor switch includes a second control electrode, which are coupled to the actuating device.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: December 21, 2021
    Assignee: AUDI AG
    Inventor: Roman Strasser
  • Patent number: 11133690
    Abstract: A battery system with a large-format Li-ion battery powers attached equipment by discharging battery cells distributed among a plurality of battery packs. The discharging of the battery cells is controlled in an efficient manner while preserving the expected life of the Li-ion battery cells. Each battery pack internally supports a battery management system and may have identical components, thus supporting an architecture that easily scales to higher power/energy. Battery packs may be added or removed without intervention with a user, where one of battery packs serves as a master battery pack and the remaining battery packs serve as slave battery packs. When the master battery pack is removed, one of the slave battery packs becomes the master battery pack. Charging and discharging of the battery cells is coordinated by the master battery pack with the slave battery packs over a communication channel such as a controller area network (CAN) bus.
    Type: Grant
    Filed: June 2, 2020
    Date of Patent: September 28, 2021
    Assignee: Inventus Power, Inc.
    Inventors: Huizhi Chen, Wenhua Li, Ke Yan, Changda Guan, Zibin Cheng
  • Patent number: 11056885
    Abstract: A method of providing power support to an electrical power grid is provided. The power support is provided by an arrangement including a synchronous machine connected to a converter, the converter in turn being connected to the electrical power grid. The method is performed in a control device controlling the arrangement and includes: receiving feedback from one or both of the electrical power grid and the synchronous machine, and controlling the converter such that power support is provided to or absorbed from the electrical power grid by means of the synchronous machine based on the received feedback. A control device, arrangement, computer program and computer program products are also provided.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: July 6, 2021
    Assignee: ABB POWER GRIDS SWITZERLAND AG
    Inventors: Jean-Philippe Hasler, Jan Kheir, Philippe Maibach
  • Patent number: 10944269
    Abstract: Systems and methods for first time synchronization of a generator with an electrical grid are disclosed. According to one embodiment of the disclosure, a method of first time synchronization of a generator with an electrical grid can be provided.
    Type: Grant
    Filed: June 19, 2018
    Date of Patent: March 9, 2021
    Assignee: General Electric Company
    Inventors: Randall John Kleen, Michael Acosta, Roland Hug
  • Patent number: 10879703
    Abstract: A method for synchronization of first and second microgrids, having respective first and second voltages and frequencies. The method includes determining a possible voltage and frequency range, determining an overlapping voltage range, determining an overlapping frequency range, selecting a third voltage within the overlapping voltage range. The method also includes selecting a third frequency within the overlapping frequency range. The method also includes controlling the first microgrid to change from the first voltage and frequency to the third voltage and frequency. The method also includes controlling the second microgrid to change from the second voltage and frequency to the third voltage and frequency. The method also includes connecting the first and second microgrids to each other by closing a switch there between.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: December 29, 2020
    Assignee: ABB POWER GRIDS SWITZERLAND AG
    Inventor: Ritwik Majumder
  • Patent number: 10840838
    Abstract: In an example, a control system for controlling a generator and providing an alarm upon detection of a fault condition. The control system includes a control relay, which includes a normally-open (NO) contact pair and a normally-closed (NC) contact pair, between the transfer switch and a controller. The NO contact pair is provided by a NO contact and a common contact, and the NC contact pair is provided by a NC contact and the common contact. The controller can receive signals indicative of a state of the contact pairs of the control relay and, based on the signals, determine whether to activate the generator and/or activate an alarm system.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: November 17, 2020
    Assignee: ASCO POWER TECHNOLOGIES, L.P.
    Inventors: Steven E. Evans, Victor E. Bonachea, Mario Ibrahim, Donald K. Blackman
  • Patent number: 10777863
    Abstract: There is provided a power converter unit that can include an inverter and a plurality of batteries. The power converter unit can include a battery energy storage system (BESS) and an inverter. The BESS and the inverter can share at least one protection circuit.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: September 15, 2020
    Assignee: GE ENERGY POWER CONVERSION TECHNOLOGY LTD
    Inventors: Robert Gregory Wagoner, John S Harrison, Lukas Mercer Hansen
  • Patent number: 10778125
    Abstract: A system includes a synchronous generator coupled to an excitation system. The excitation system may output an excitation signal to excite the synchronous generator to produce a voltage and a current at an output of the synchronous generator. During startup, when the synchronous generator is rotating at less than rated speed, non-rotating synchronous electric motors may be electrically coupled to the synchronous generator. A controller may direct the excitation system to output the excitation signal to generate, with the synchronous generator, a first magnitude of current flow, and the synchronous motor loads are non-rotational in response to receipt of the first magnitude of current flow. In addition, the controller may selectively direct output of a pulse of the excitation signal, when the synchronous generator is rotating at less than rated speed, to urge the non-rotating synchronous motor loads into rotational electrical alignment with the synchronous generator and each other.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: September 15, 2020
    Assignee: Rolls-Royce North American Technologies Inc.
    Inventors: Mark Jon Blackwelder, Paul M. Rancuret
  • Patent number: 10642241
    Abstract: Embodiments provide systems, methods and apparatus for improved generation control for microgrids. Embodiments include providing a microgrid management system (MGMS) having a smart generation control (SGC) system in communication with a plurality of resources and loads, wherein the resources and loads are coupled to a microgrid transmission line that is couplable to a macrogrid transmission line; performing preprocessing of the resources; determining current frequency, interchange, schedule, and area control error (ACE); monitoring and controlling the microgrid based on a system mode, a control mode, and system status; deriving a set point for active power control of resources; and transmitting control commands. Numerous other aspects are provided.
    Type: Grant
    Filed: August 11, 2015
    Date of Patent: May 5, 2020
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Dingguo Chen, Ram P. Chinchali, Shashank Pande
  • Patent number: 10644493
    Abstract: A system for determining a disturbance in an electrical power delivery system external to a distributed site based on rate of change of frequency and power flow at the distributed site. The system may open a breaker to isolate the distributed site from the electric power delivery system upon detection of a disturbance external to the distributed site.
    Type: Grant
    Filed: May 1, 2018
    Date of Patent: May 5, 2020
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Krishnanjan Gubba Ravikumar, Ashish Upreti
  • Patent number: 10523031
    Abstract: A method and device for controlling a two-wire discharge circuit of a battery, introducing a whole-bus voltage outer loop and an inductive current average value or inductive current actual value closed loop as a main control loop of the two-wire discharge circuit of the battery so as to guarantee a stable voltage of the whole bus. On the basis of the main control loop, duty ratios of switch transistors in respective discharge branches are adjusted to control the respective discharge branches to independently charge and discharge corresponding half-buses so as to balance the bus voltage. The method and the device avoid accessing a central wire of the battery and any additional circuits, and satisfy a technical specification of a three-wire access of the battery, thereby improving a circuit performance of the two-wire discharge circuit of the battery.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: December 31, 2019
    Assignee: Vertiv Corporation
    Inventors: Charles Frederick Blair, Yang Bing, Junfeng Fu, Yunqing Song, Guoshun Yang
  • Patent number: 10468886
    Abstract: Electrical systems and related operating methods are provided. One exemplary electrical system includes a sensing arrangement coupled to an electrical grid interface to measure an electrical characteristic of the electrical grid interface, a power conversion module having an output coupled to the electrical grid interface, and a control module coupled to the sensing arrangement and the power conversion module. The control module determines an estimated frequency of the electrical characteristic based on a phase error corresponding to a measured value of the electrical characteristic obtained from the sensing arrangement, determines a frequency correction power command based on a difference between the estimated frequency and a target frequency, and operates the power conversion module in accordance with the frequency correction power command.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: November 5, 2019
    Assignee: S&C Electric Company
    Inventor: David Glenn Porter
  • Patent number: 10429815
    Abstract: A motor control device for controlling driving of a motor based on position commands input from a host control device includes an offset value memory including first circuitry which stores offset values corresponding to predetermined values of position commands, respectively, and a drive controller including second circuitry which acquires, from the offset value memory, one of the offset values corresponding to an input position command among the position commands, and control driving of a motor based on an offset position command obtained by adding the one of the offset values to or subtracting the one of the offset values from the input position command.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: October 1, 2019
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Yasufumi Yoshiura, Yusuke Oka, Toshinobu Kira
  • Patent number: 10369390
    Abstract: The object of this patent application consists of a safety belt to be overlaid on the original back portion of the seat belt air belonging to the field of safety engineering, whose technique allows the rapid detachment by third parties, with the pull of a single rigging included, for the case where the user on air position is unable to do so in the case of rescue, more specifically the overlay safety belt with disengageable rings (1) that includes a lumbar belt (2), with an elongated base strip (3), which is stitched over, another upper strip (4), which overlaps the original belt, the base strap (3) over which there is another woven upper strip (4) whose set overlaps itself to the original belt, and the base strip (3) has, at each end, a hinged end that lays down the original air safety belt end buckles, upper strip (4) features an engagement fold (6), preceded by a grommet (8), and a double rigging (10), has its ends equipped with a metallic pin (11).
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: August 6, 2019
    Inventor: Jaques Lesser Levy
  • Patent number: 10300779
    Abstract: A failsafe device is provided to perform an operation including at least a part or all of one or more of a mechanical system, a hydraulic system, an electrical system, and a chemical system. The failsafe device includes at least one electronic system and an least one non-electronic system. The at least one electronic system is controlled by at least one computer and/or microprocessor. The at least one non-electronic system includes at least one of the mechanical, hydraulic, electrical, and chemical systems. The failsafe device is configured to operate in two modes, a normal mode and an emergency mode.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: May 28, 2019
    Assignee: Frampton Ellis
    Inventor: Frampton Ellis
  • Patent number: 10205327
    Abstract: A battery system includes: a plurality of battery banks connected in parallel with each other; and a distribution controller coupled to the battery banks and configured to: receive a command comprising a target charging/discharging amount; determine a priority order between the battery banks based on a state of charge (SOC) and a state of health (SOH) of each of the battery banks; select at least some of the battery banks to be charged or discharged according to the target charging/discharging amount based on the priority order; and perform a charging or discharging on the at least some of the battery banks according to the target charging/discharging amount so that others of the battery banks are paused.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: February 12, 2019
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Yoshiaki Okui
  • Patent number: 10186898
    Abstract: A capacitive power system having a service life extending approach. The system may have an ultra or super capacitor with high capacitance. A predetermined amount of energy may be stored in the capacitor, sufficient for providing power to an electrically powered mechanism in the event the mechanism loses its power, to place it in a fail safe condition. With the capacitor at an initial capacitance, the working voltage may be set as low as possible while still retaining sufficient capacity for storing the predetermined amount of energy. As the capacitor's capacitance decreases with age, the working voltage of the capacitor may be gradually increased to compensate for lost capacitance. If the mechanism loses power, then a discharge of the capacitor may be initiated to transfer energy to the mechanism. If the electrical mechanism has power, then a charging of the capacitor may be initiated to transfer energy to the capacitor.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: January 22, 2019
    Assignee: Honeywell International Inc.
    Inventor: Radek Stupka
  • Patent number: 10141751
    Abstract: A control system for an electric storage system, in which a plurality of pairs of storage batteries and converters are connected in parallel to a power system, includes: a unit that decides charge and discharge of total power by the pairs of storage batteries and converters; and a unit that distributes the charge and discharge power decided by the charge and discharge power decision unit to the pairs of storage batteries and converters. The power distribution decision unit compares the charge and discharge total power with a limit output when conversion efficiency of the converters is equal to or greater than standard efficiency, and decides a running number by which an output of all the pairs of running storage batteries and converters is equal to or greater than the limit output when the charge and discharge total power is equal to or greater than the limit output.
    Type: Grant
    Filed: September 22, 2014
    Date of Patent: November 27, 2018
    Assignee: Hitachi, Ltd.
    Inventors: Hiroshi Arita, Hideki Inoue, Tooru Akatsu, Masashi Toyota
  • Patent number: 10135250
    Abstract: The present disclosure relates to systems and methods for balancing electrical generation and electrical demand in an electrical power system. In various embodiments, a controller may receive priority designations associated with a plurality of loads and inertia of a plurality of electrical generators. A trigger event analysis subsystem may detect a trigger event based on electrical conditions at a plurality of nodes within the electrical power system. A topology detection subsystem may identify a first subset of the plurality of nodes at which electrical conditions reflect the first trigger event and may associate those nodes in an electrical island. An electrical balancing system and control system may be configured to determine and eliminate an imbalance between electrical generation and electrical demand based on the combined inertia of the subset of the plurality of electrical generators and the plurality of priority designations associated with the subset of the plurality of loads.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: November 20, 2018
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventor: Scott M. Manson
  • Patent number: 10088885
    Abstract: An implementation of a system disclosed herein provides a method comprising detecting a power loss to an apparatus, isolating the apparatus from a power supply, notifying the apparatus of the power loss, and extending operation of the apparatus for a predetermined time period using a charge reservoir.
    Type: Grant
    Filed: December 31, 2015
    Date of Patent: October 2, 2018
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Christopher Anthony Massarotti, Philip Lee Jurey
  • Patent number: 9906057
    Abstract: A modular multilevel converter for hybrid energy storage includes three phases connectable in series to a battery, and in parallel to one another. Each phase includes at least two arms of sub-modules and buffer inductors, and each of the sub-modules comprises a half-bridge and an ultracapacitor. A two layer controller, including a coordination layer and a converter layer, is configured to independently control battery output power and ultracapacitor output power, and to distribute a power load between the battery and the ultracapacitor to optimize the performance of a hybrid energy storage system.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: February 27, 2018
    Assignee: NEC Corporation
    Inventors: Feng Guo, Yanzhu Ye, Ratnesh Sharma
  • Patent number: 9899842
    Abstract: In a control method performed in shifting a plurality of different types of power generators to parallel operation, at least one of output voltage and a voltage drooping characteristic of at least one of the plurality of power generators is changed. In the case where the plurality of different types of power generators are a plurality of synchronous power generators having different voltage drooping characteristics, the voltage drooping characteristic of one power generator having a smaller voltage drooping characteristic among the plurality of power generators to be operated in parallel is changed so as to coincide with the voltage drooping characteristic of the other power generator. At the time of changing the voltage drooping characteristic, the other power generator is controlled so that the output voltage thereof is maintained at a value before start of the parallel operation.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: February 20, 2018
    Assignees: KAWASAKI JUKOGYO KABUSHIKI KAISHA, DAIICHI TECHNO CO., LTD.
    Inventors: Yukihiro Shiota, Mitsuru Chida, Kazunori Sato, Koushichi Tateishi
  • Patent number: 9800055
    Abstract: The present disclosure pertains to systems and methods for using time synchronized measurements of a generator output and an electrical bus, together with generator control algorithms to synchronize the frequency, voltage, and phase of a generator, or group of generators, prior to electrically connecting the generator to the electrical bus. More particularly, but not exclusively, the present disclosure pertains to systems that may be operated in an islanded configuration and in which one or more generators may be selectively synchronized based on a common time reference. The common time reference may allow the generators to be synchronized by autonomously driving one or more generators to a specified phase angle and frequency.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: October 24, 2017
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventor: Nicholas C. Seeley
  • Patent number: 9800088
    Abstract: An electronic device configured to switchover power from a primary source to an alternate source to maintain continuity of power supplied to a load bus. The electronic device includes one or more processors configured to identify availability of the alternate source using source monitoring in order to measure and calculate a tracking frequency for controlling a variable sampling interval of the one or more processors. The processors are configured to store signal samples and associated time stamps into a variable length buffer and store new sample values and associated new time stamps into the fixed length buffer. The processors are configured to determine attributes from samples of the alternate source using the tracking frequency. The processors are configured to execute a source switchover signal when the primary source is unavailable based by comparing load bus attributes to alternate source attributes at an estimated instance of switchover.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: October 24, 2017
    Assignee: General Electric Company
    Inventors: Ilia Voloh, Mitalkumar G. Kanabar, Tarlochan Sidhu, Mohammad Dadash Zadeh, Amin Zamani
  • Patent number: 9793845
    Abstract: Disclosed embodiments relate to apparatuses, methods, and systems for restarting an induction machine. In some embodiments, a method includes estimating a position of a rotor and a speed thereof in a position and speed estimation Operation, resetting a speed reference to correspond to the speed of the rotor in a speed reference resetting Operation, generating a control voltage corresponding to the speed reference to regulate a voltage magnitude using the control voltage in a voltage magnitude regulation Operation, and re-accelerating the induction machine up to a target speed after the regulation of the voltage magnitude in a re-acceleration Operation.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: October 17, 2017
    Assignees: LSIS CO., LTD., RESEARCH COOPERATION FOUNDATION OF YEUNGNAM UNIVERSITY
    Inventors: Hak-Jun Lee, Anno Yoo, Se-Hwan Kim, Jul-Ki Seok
  • Patent number: 9722494
    Abstract: A controller for a multiphase converter comprises a first stage controller for producing a first gate drive signal to turn on a first power transistor of a first boost converter; a delay element configured to produce a delayed signal by delaying the first gate drive signal by half a cycle length; a time difference detection element configured to: output a turn on command based on a zero crossing detection (ZCD) signal indicating that one or more zero current conditions of a second boost converter of the multiphase converter are met and the delayed signal; and a second stage controller configured to assert a second gate drive signal to turn on a second power transistor of the second boost converter based on the turn on command.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: August 1, 2017
    Assignee: STMICROELECTRONICS S.R.L.
    Inventors: Alberto Bianco, Giuseppe Scappatura
  • Patent number: 9698603
    Abstract: A first internal phase difference angle calculator for integrating a deviation between a first frequency command value and a frequency obtained by frequency obtaining device to calculate a first internal phase difference angle, a first internal electromotive voltage command value calculator for proportioning and calculating a deviation between a first reactive power command value and a reactive power obtained based on the value measured by first measuring device, and adding a reference voltage to the deviation so as to calculate a first internal electromotive voltage command value, and a first current command value calculator for calculating a command value of an output current from a first power converter based on the first internal phase difference angle, the first internal electromotive voltage command value, and a voltage measured by the voltage measuring device. The apparatus controls the first power converter based on an output from the first current command value calculator.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: July 4, 2017
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Kazushige Sugimoto, Masahide Kawamura, Kentaro Sakata, Mitsuchika Ogawa, Kentaro Tsuda, Takefumi Iizaka, Yuko Hirase
  • Patent number: 9606563
    Abstract: An integrated circuit is provided with a bandgap voltage reference circuit having a bandgap reference voltage output. A bandgap failure detection circuit is coupled to the bandgap reference voltage output. The bandgap failure detection forms a model value of the reference voltage from a first time, compares a present value of the reference voltage at a second time to the model value; and asserts a bandgap fail signal to indicate when the present value is less than the model value by a threshold value. The integrated circuit is reset by the bandgap fail signal. The detection circuit may be operated from a failsafe voltage domain that also allows a critical circuit to complete a pending operation during a reset.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: March 28, 2017
    Assignee: TEXAS INSTRUMENTS DEUTSCHLAND GMBH
    Inventors: Frank Dornseifer, Matthias Arnold, Johannes Gerber
  • Patent number: 9509145
    Abstract: The disclosed distributed power supply system does not become disconnected from a grid simultaneously with others when the grid voltage falls instantaneously. In a distributed power supply device which controls an inverter circuit 10 based on a control signal obtained by comparing a predetermined carrier signal and voltage command signals of three phases and which converts DC power to AC power and supplies the AC power to a power grid of a three-phase AC power supply, fundamental wave signals of three phases are generated from a grid voltage of the three-phase AC power supply. A reference cosine wave signal is generated from the fundamental wave signals of three phases. A third harmonic signal is generated from the reference cosine wave signal and the fundamental wave signals of three phases. The three-phase fundamental wave signals and the third harmonic signal are added to generate voltage command signals of three phases.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: November 29, 2016
    Assignees: HOKURIKU ELECTRIC POWER COMPANY, FUJI ELECTRIC CO., LTD.
    Inventors: Norikazu Kanao, Kansuke Fujii, Toshiya Yamada, Motohiro Katayama
  • Patent number: 9478378
    Abstract: The present disclosure provides apparatus, systems, and methods for preventing out-of-synchronism closing between power systems. An intelligent electronic device (IED) apparatus may include a control component and a delay component. The control component is configured to selectively control opening and closing of a breaker. The control component selectively outputs a close signal to cause the breaker to connect a first portion of a power delivery system to another portion of the power delivery system. The delay component is configured to delay output of the close signal to the breaker. The delay component includes circuitry independent from control by the control component and the delay component is inconfigurable from a remote location.
    Type: Grant
    Filed: January 4, 2013
    Date of Patent: October 25, 2016
    Assignee: SCHWEITZER ENGINEERING LABORATORIES, INC.
    Inventors: Bogdan Z Kasztenny, Dale S Finney
  • Patent number: 9379577
    Abstract: A capacitive power system having a service life extending approach. The system may have an ultra or super capacitor with high capacitance. A predetermined amount of energy may be stored in the capacitor, sufficient for providing power to an electrically powered mechanism in the event the mechanism loses its power, to place it in a fail safe condition. With the capacitor at an initial capacitance, the working voltage may be set as low as possible while still retaining sufficient capacity for storing the predetermined amount of energy. As the capacitor's capacitance decreases with age, the working voltage of the capacitor may be gradually increased to compensate for lost capacitance. If the mechanism loses power, then a discharge of the capacitor may be initiated to transfer energy to the mechanism. If the electrical mechanism has power, then a charging of the capacitor may be initiated to transfer energy to the capacitor.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: June 28, 2016
    Assignee: Honeywell International Inc.
    Inventor: Radek Stupka
  • Patent number: 9285851
    Abstract: Methods for optimizing battery use for a known future load are described. In an embodiment, one or more battery cells are selected from a set of battery cells to provide power to a computing-based device. The battery cells are selected based on discharge profile data for each battery cell and both the current power requirement and a known future power requirement of the computing-based device. The known future power requirement is calculated based on information available to the operating system running on the computing-based device. In some examples, one or more battery cells may also be selected for charging when a power source is available and these cells may be selected based on charge profile data and the known future power requirement. The selection of the battery cells may also be made in order to satisfy a battery optimization goal, which may be defined by a user.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: March 15, 2016
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Stephen Hodges, Ranveer Chandra, Julia Louise Meinershagen, James Scott
  • Patent number: 9231409
    Abstract: This invention is a System On a Chip (SOC) requiring two tamper resistant externally generated power supplies. A first, higher power supply powers I/O and analog circuits. A second, lower power supply powers digital circuits and memory. A first voltage monitor circuit powered by said first power supply generates a first output signal when the first power supply is below an operational limit high level. A second voltage monitor circuit powered by said first power supply indicates when the second power supply is above an operational high limit level. A power switch is controlled by the first voltage monitor circuit. This power switch connects the second power supply and second load when closed and isolates them when open. Thus the memory cannot be accessed when the I/O and analog power supply is out of specification.
    Type: Grant
    Filed: January 18, 2013
    Date of Patent: January 5, 2016
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Erkan Bilhan
  • Patent number: 9150112
    Abstract: First and second system main relays are connected between a first power storage device and a second power storage device, respectively, and a first power line. First and second relays for charging are connected between first and second power storage devices, respectively, and a second power line. A control device selectively forms any of a first power feed path formed by connecting each of the first and second power storage devices to the first power line, and a second power feed path formed by connecting, to the first power line, one of the first and second power storage devices connected in parallel when the first and second relays are turned ON, thereby ensuring a power feed path to the load.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: October 6, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Yoshinobu Sugiyama
  • Patent number: 9128130
    Abstract: A system for managing and synchronizing the operation of an electric power generation and delivery system that includes a number of generators configured to provide distributed electric power generation is disclosed. In the disclosed system, a number of intelligent electronic devices coupled with at distributed generators may be utilized to synchronize the operation of the generators with the system when the generators become isolated from the system. In some embodiments, the disclosed intelligent electronic devices may control the speed of isolated generators based on synchronization information received from at least one other intelligent electronic device and a common time signal.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: September 8, 2015
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventor: Nicholas C. Seeley
  • Patent number: 9122471
    Abstract: A computer determines a characteristic corresponding to each of a first power source and a second power source. The first and second power sources are connected to one or more power distribution units and are configured to provide power in a datacenter. The characteristic includes at least one of a current, a resistance, a voltage, a frequency, a phase, and a magnetic field. The computer generates a comparison of the characteristic corresponding to the first power source and the second power source, to a threshold value of the characteristic. The computer determines if the comparison violates the threshold value of the characteristic. In response to determining the comparison does not violate the threshold value of the characteristic, the computer determines that the first power source and the second power source are connected to a given power distribution unit included in the one or more power distribution units.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: September 1, 2015
    Assignee: Lenovo Enterprise Solutions (Singapore) Pte. Ltd.
    Inventors: John A. Henise, IV, William M. Megarity, Luke D. Remis, Gregory D. Sellman
  • Patent number: 9024474
    Abstract: Systems and methods of providing power with an uninterruptible power supply are provided. The uninterruptible power supply includes a first input to receive an input AC voltage from a power source, the input AC voltage having an associated phase angle, and a second input to receive an input voltage from a backup power source. The uninterruptible power supply also includes an output. The output provides output power derived from power from at least one of the power source and the backup power source. The uninterruptible power supply also includes an inverter coupled to the backup power source, a relay and a controller. The relay is configured to couple the first input with the output in a first position, and to couple the inverter with the output in a second position.
    Type: Grant
    Filed: August 3, 2011
    Date of Patent: May 5, 2015
    Assignee: Schneider Electric It Corporation
    Inventors: Lynn Ernest Schultz, Noah L. Pendleton, Vishwas Mohaniraj Deokar
  • Patent number: 9006932
    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: Grant
    Filed: January 18, 2010
    Date of Patent: April 14, 2015
    Assignee: Sony Corporation
    Inventors: Jusuke Shimura, Yoshiaki Inoue
  • Patent number: 8981708
    Abstract: The present invention concerns a charging apparatus for charging electric storage devices of electric vehicles including a feed-in unit for feeding electric energy into an electric ac voltage network including an electric dc voltage intermediate circuit for the intermediate storage of electric energy with an intermediate circuit voltage, and an inverter for converting a direct current of the dc voltage intermediate circuit into an alternating current, for feeding it into the electric ac voltage network and for converting an alternating current from the ac voltage network into a direct current for feeding it into the dc voltage intermediate circuit, and at least one electric storage charge circuit for at least partial charging of one of the electric storage devices from the dc voltage intermediate circuit and for at least partial discharging of one of the electric storage devices into the dc voltage intermediate circuit.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: March 17, 2015
    Inventors: Volker Diedrichs, Alfred Beekmann
  • Publication number: 20150061298
    Abstract: An electromagnetic braking system includes an electrically conductive disc coupled to a rotatable shaft of a power generation system for operating in an island mode. The rotatable shaft is operatively coupled between a prime mover and a generator for supplying power to an island grid. The electromagnetic braking system further includes a controller for receiving at least one status or synchronization signal and for generating a control signal based on the at least one signal and an inducting unit for applying an electromagnetic braking force on the electrically conductive disc when commanded by the control signal to regulate a rotational speed of the rotatable shaft.
    Type: Application
    Filed: November 13, 2014
    Publication date: March 5, 2015
    Inventors: Ara Panosyan, Stefan Schroeder, Christoph Boeld, Herbert Schaumberger, Johann Hirzinger-Unterrainer, Xiaoting Dong, Uwe Liebscher
  • Patent number: 8933588
    Abstract: Provided are a method and a device for controlling an internal combustion engine driven generator set to run in parallel. The method includes: each time an internal combustion engine is started, a controller detects whether a voltage is outputted in an output voltage circuit; obtaining of respective active power and effective values of output currents; seeking of corresponding output voltage amplitudes in respective droop characteristic curves according to the effective values of the respective output currents, and seeking of corresponding inner power factor angles in the respective droop characteristic curves according to the respective active power; the droop characteristic curves of each generator have the same slope; and each generator is controlled to reach the respective corresponding output voltage amplitudes and inner power factor angles.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: January 13, 2015
    Assignee: Loncin Motor Co., Ltd.
    Inventors: Hui Tian, Yu Long
  • Patent number: 8928179
    Abstract: A method for no break power transfer in a variable frequency power generating system, the power generating system comprising a first bus connected to a first generator and a second bus connected to a second generator includes configuring a power transfer device to output power that is synchronized to match a voltage and a frequency of the second bus to the second bus; reconfiguring the power transfer device to output power that is synchronized to match a voltage and a frequency of the first bus to the second bus; and closing a tie switch located between the first bus and the second bus.
    Type: Grant
    Filed: December 6, 2010
    Date of Patent: January 6, 2015
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Waleed M. Said
  • Patent number: 8917058
    Abstract: An object of the invention is to make the charging power as high as possible in a battery charging control system for selectively charging a plurality of batteries having different voltages with energy generated by an alternator. To achieve the object, the battery charging control system according to the invention includes an alternator having a variable generation voltage and a plurality of batteries having different charging voltages, wherein maximum generation power defined as the highest power that the alternator can generate and maximum charging power defined as the highest power that each battery can accept are obtained, and a battery for which the charging power is highest is selected to be charged based on a comparison of the maximum generation power and the maximum charging power.
    Type: Grant
    Filed: January 22, 2010
    Date of Patent: December 23, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takuya Hirai, Yuichi Shimasaki, Yoshinori Futonagane
  • Patent number: 8912684
    Abstract: A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses mechanical power to compress air (when it is acting as a compressor) and converts the energy stored in compressed air to mechanical power (when it is acting as an expander). In certain embodiments, the compressor-expander comprises one or more stages, each stage consisting of pressure vessel (the “pressure cell”) partially filled with water or other liquid. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber(s) thereof. Suitable valving allows air to enter and leave the pressure cell and cylinder device, if present, under electronic control.
    Type: Grant
    Filed: May 3, 2013
    Date of Patent: December 16, 2014
    Assignee: LightSail Energy, Inc.
    Inventors: Karl E. Stahlkopf, Danielle A. Fong, Stephen E. Crane, Edwin P. Berlin, Jr., AmirHossein Pourmousa Abkenar
  • Patent number: 8902569
    Abstract: A system includes a rack, computing devices coupled to the rack, a rack PDU, and one or more input power cables. The rack PDU includes an enclosure, two or more power input receptacles on the enclosure, and two or more power output receptacles on the enclosure. The output power receptacles supply power to the computing devices. The input power cables are coupled in one or more of the power input receptacles. The input power cables supply electrical power from an electrical power system to the rack PDU.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: December 2, 2014
    Assignee: Amazon Technologies, Inc.
    Inventors: Max J. Wishman, Darin Lee Frink, Peter G. Ross, Chao Chen, Christopher N. Watson
  • Patent number: 8896330
    Abstract: A method and apparatus for monitoring an AC line for impedance change. In one embodiment, the method, comprises superimposing a tone on an AC current coupled to the AC line, wherein the tone is a higher frequency than an AC voltage waveform on the AC line; applying a correlation over a sampled AC voltage waveform, obtained by sampling the AC voltage waveform, to generate a correlated signal; and determining whether at least one change in characteristic of the correlated signal occurs.
    Type: Grant
    Filed: June 1, 2012
    Date of Patent: November 25, 2014
    Assignee: Enphase Energy, Inc.
    Inventors: Andrew Barnes, Brian Acker
  • Patent number: 8878396
    Abstract: A continuous grounding system for use in an alternating current system including a transformer is disclosed. The system includes a switch assembly connected between a transformer neutral of a transformer and a ground, the switch assembly having an open position and a closed position, the open position disrupting the path through the switch assembly between the electrical connection and the transformer neutral, and the closed position establishing a path connecting the electrical connection to the transformer neutral through the switch assembly, wherein in normal operation of the alternating current electrical device the switch assembly remains in a closed position. The system also includes a DC blocking component positioned in parallel with the switch assembly and connected between the transformer neutral and the ground.
    Type: Grant
    Filed: June 13, 2011
    Date of Patent: November 4, 2014
    Assignee: Emprimus, LLC
    Inventors: Frederick R. Faxvog, Wallace Jensen, Gale Nordling, Greg Fuchs, David Blake Jackson, Terry Lee Volkmann, James Nicholas Ruehl, Brian Groh
  • Patent number: 8872380
    Abstract: An energy storage system includes a plurality of battery units; a plurality of thermistors detecting a temperature of the plurality of battery units; a multiplexer performing multiplexing on the plurality of thermistors, and connecting a thermistor selected from among the plurality of thermistors to a reference resistor; a power switch unit arranged between the reference resistor and a power voltage terminal; and a control signal input unit receiving a control signal applied to the multiplexer and the power switch unit, and receiving two or more control bits contained in the control signal. In the energy storage system, a temperature measurement operation is performed at a plurality of measurement positions, whereby a current state of a battery may be accurately detected, an entire circuit may be reduced and simplified, and low power consumption may be realized.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: October 28, 2014
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Kyung-Sub Shim
  • Patent number: 8866344
    Abstract: A system parallels engine-generators on a common bus and includes circuit breakers and automatic voltage regulators. Each engine-generator includes an output having an alternating current voltage. Each breaker is between the output of a corresponding engine-generator and the bus. Each regulator includes a first mode controlling field excitation for a corresponding engine-generator and a second mode automatically controlling the AC voltage.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: October 21, 2014
    Assignee: Eaton Corporation
    Inventor: Timothy Hedquist