For Electrical Fault Detection Patents (Class 702/58)
  • Patent number: 10319822
    Abstract: This method for controlling an IGBT-type transistor includes a phase for switching the transistor between an on state and an off state. Said phase comprises generating a setpoint current whereof the intensity on the gate of the transistor assumes different setpoint values. At least some of the setpoint values are chosen as a function of the sign of the temporal derivative of the main current. Each setpoint value is chosen from a set of predetermined setpoint values.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: June 11, 2019
    Assignee: ALSTOM TRANSPORT TECHNOLOGIES
    Inventors: Florent Andrianoelison, Eric Rabasse, Stephane Boisteau
  • Patent number: 10304708
    Abstract: A test system includes a signal generator, a plurality of transmission/reception circuits and a voltage generator. The signal generator generates a test signal. The transmission/reception circuits are connected to a plurality of transmission lines. The transmission lines each include a main line and at least one branch line connected to the main line. The transmission/reception circuits provide the test signal to the transmission lines. The transmission/reception circuits detect a response signal corresponding to the test signal. The voltage generator supplies a first reference voltage and one of the second reference voltage greater than the first reference voltage and a third reference voltage between the first reference voltage and the second reference voltage to at least one of the transmission/reception circuits.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: May 28, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Gyuyeol Kim, Shin-Ho Kang
  • Patent number: 10281514
    Abstract: The invention relates to a method for ascertaining an earth fault and the earth-fault direction in a three-phase network which is operated in a compensated manner or in an insulated manner. Value pairs of a zero voltage and a zero current are measured, the active or reactive energy is calculated, and a voltage flag and a current flag are combined by a Boolean link, wherein the presence of a earth fault is ascertained depending on the result, and a decision is made as to whether the earth-fault direction is signalled as “forward” or “reverse” at least on the basis of the sign of the active or reactive energy.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: May 7, 2019
    Assignee: NSE AG
    Inventor: Andreas Aebersold
  • Patent number: 10274945
    Abstract: A monitoring system for an HVAC system of a building includes a monitoring server located remotely from the building. The monitoring server receives, from a device installed at the building, (i) time-domain current data based on a measured aggregate current supplied to a plurality of components of the HVAC system, and (ii) data based on frequency-domain current data of the measured aggregate current. Based on the received data, the monitoring server accesses (i) whether a failure has occurred in a first component of the plurality of components and (ii) generates a preliminary advisory in response to determining that the failure has occurred. The monitoring server compares the preliminary advisory to a threshold value based on data stored from prior advisories. If the preliminary advisory is on a first side of the threshold value, the monitoring server provides the preliminary advisory as a first advisory to a technician for review.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: April 30, 2019
    Assignee: EMERSON ELECTRIC CO.
    Inventors: Jeffrey N. Arensmeier, Gregg M. Hemmelgarn, Fadi M. Alsaleem, Priotomo Abiprojo
  • Patent number: 10272792
    Abstract: An EVSE is equipped with voltage and current monitors to monitor V and I values over the time of charging. Normal V & I charging values for EV charging have been previously established and plotted as a threshold curve. During present charging, the V and Z values are plotted and compared to the threshold values and the slope of the V/I curve. If present value of V is less than the threshold value, or drops over time, or the Z value increases over time; current (I) to the EV is reduced and a new V/I curve is plotted. Slope of the new V/I curve is compared to the threshold and also checked for change of slope over time. If the new V/I curve slope is greater than the threshold slope, or is changing over time, corrective action is taken.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: April 30, 2019
    Assignee: Schneider Electric USA, Inc.
    Inventors: Kevin M Jefferies, Benjamin W Edwards, Matthew L White, Konstantin Alexander Filippenko, Richard Karl Weiler
  • Patent number: 10248753
    Abstract: A method, system, and computer product for performing a coupled noise analysis in an integrated circuit (IC) design include copying one or more victim circuit sections of a victim circuit in the IC design, generating a blockage circuit section that represents a blockage aggressor circuit in the IC design, using the copied one or more victim circuit sections of the victim circuit, determining at least one subcircuit from the blockage circuit section, selecting, for a victim pin on the victim circuit, a power-driven virtual node on the at least one subcircuit, applying a power source to the power-driven virtual node on the at least one subcircuit, calculating a coupled noise at the victim pin contributed by the at least one subcircuit in response to the power source being applied, comparing the coupled noise to a threshold noise level, and altering the IC design when the coupled noise exceeds the threshold noise level.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: April 2, 2019
    Assignee: International Business Machines Corporation
    Inventors: Tsz-mei Ko, Thomas G. Mitchell, Jason D. Morsey, Steven E. Washburn, Patrick M. Williams
  • Patent number: 10249912
    Abstract: An electrical control system having a primary microcontroller, a secondary microcontroller, a slave IC, and a communication IC is provided. The communication IC sets a fault line to a first logic level indicating that an overvoltage condition has been detected in a battery cell. The secondary microcontroller sends a message to the primary microcontroller via a communication bus indicating that the overvoltage condition has been detected in response to the fault line having the first logic level. The primary microcontroller determines that both the message from the second microcontroller was received and the fault line has the first logic level to confirm that the communication bus is functioning as desired and that the secondary microcontroller is functioning as desired.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: April 2, 2019
    Assignee: LG Chem, Ltd.
    Inventor: Edvin Godo
  • Patent number: 10228408
    Abstract: The fault location of a fault on a line of an electrical energy supply network is determined. First and second current and/or voltage values are measured and provided with a timestamp at the line ends of the line. Following the occurrence of a fault, the timestamped first and second values are used to determine the fault location. Profiles of travelling waves propagating along the line towards the line ends when the fault occurs are determined from the timestamped first and second values at both line ends. The fault location is defined from the profiles of the travelling waves from a time difference with which the travelling waves arrive at the two line ends. The time difference is derived from a pattern comparison of the profiles of the travelling waves determined for the line ends.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: March 12, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventors: Cezary Dzienis, Andreas Jurisch
  • Patent number: 10228740
    Abstract: In embodiments, apparatuses, methods and storage media (transitory and non-transitory) are described that include a plurality of sensor connectors to removably receive a corresponding plurality of sensors and a power management module to selectively provide power to sensor connector power terminals in response to power management signals from a sensor control module. Other embodiments may be described and/or claimed.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: March 12, 2019
    Assignee: Intel Corporation
    Inventors: Mark Kelly, Keith Nolan, Hugh M. Carr, Sean O'Byrne
  • Patent number: 10197633
    Abstract: A method for detecting the use of a battery of an energy store system may include continuously generating a use profile by transforming data into a dynamically updated visual representation of the use of the battery storage device using a frequency distribution.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: February 5, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventors: Peter Eckert, Christian Koermeier, Karsten Rechenberg
  • Patent number: 10193778
    Abstract: A communication device detects whether anomalous events occur with respect to at least one node in a utility network. The communication device has recorded therein threshold operating information and situational operating information. The threshold operating information includes data indicative of configured acceptable operating parameters of nodes in the network based on respective locational information of the nodes. The situational information includes data indicative of configured operation data expected to be received from nodes in the network during a predetermined time period, based on a condition and/or event occurring during the time period. The communication device receives operation data from nodes in the network, and determines whether the operation data from a node constitutes an anomalous event based on a comparison of the received operation data with (i) the threshold operating information defined for the node and (ii) the situational information.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: January 29, 2019
    Assignee: ITRON NETWORKED SOLUTIONS, INC.
    Inventors: Raj Vaswani, Jana van Greunen, Aditi Dubey, Kunal Pankaj Shah
  • Patent number: 10186901
    Abstract: A method for decentralizing a piece of information pertaining to a power availability situation in a power grid at a particular instant includes ascertaining power availability data in the power grid by a power control center that is associated with the power grid, and generating a piece of power availability information by the power control center at the particular instant. The method also includes transmitting the power availability information from the power control center to at least one data reception system, and processing and/or outputting the power availability information by the data reception system.
    Type: Grant
    Filed: December 23, 2015
    Date of Patent: January 22, 2019
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventor: Peter Rohrauer
  • Patent number: 10180466
    Abstract: An exemplary embodiment of the present invention provides a method for determining root causes of issues in an electrical grid. The method includes receiving local data from each of a plurality of meters. The local data may be indicative of voltage levels measured by the plurality of meters. The method also includes identifying abnormalities in the received local data. An abnormality is indicated by local data indicative of a voltage level that is outside of a predetermined range of acceptable levels. The method further includes associating each of the identified abnormalities with a respective meter and a geographic location of the respective meter and analyzing each of the identified abnormalities according to a predetermined set of evaluation factors to determine a root cause.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: January 15, 2019
    Assignee: Southern Company
    Inventors: Robert D. King, Joshua Ashcraft, Jamie R. Meaders, Tommy Jamison, Jr., Ravikanth C. Paruchuri, Wesley M. Granade, Mitch A. Cason, Derl W. Rhoades, Brandon Lundy
  • Patent number: 10152336
    Abstract: Technologies for managing sensor conflicts in a compute system include determining an implication of stimuli sensed by two or more sensors of the compute system and determining whether a conflict exists between the determined implications. If a conflict does exist, an amount of discomfort is applied to the compute device. For example, a performance characteristic of the compute device may be adversely impacted based on the determined conflict. In some embodiments, the level of applied discomfort is based on a magnitude, importance, and/or duration of the implication conflict.
    Type: Grant
    Filed: December 26, 2015
    Date of Patent: December 11, 2018
    Assignee: Intel Corporation
    Inventors: Tobias M. Kohlenberg, Brian D. Johnson, John C. Weast
  • Patent number: 10145886
    Abstract: Provided is a leakage current value calculation device which precisely calculates a leakage current I0r which is a component caused by a ground insulation resistance value of an electric circuit, in the leakage current I0 flowing through the electric circuit.
    Type: Grant
    Filed: September 7, 2015
    Date of Patent: December 4, 2018
    Assignee: Tanashin Denki Co., Ltd.
    Inventors: Kenya Matsushita, Masakatsu Sawada
  • Patent number: 10110976
    Abstract: Systems and methods of the present disclosure are directed to determining the integrity of system measurements. The system and methods of the present disclosure can detect corrupted process measurement signals that can originate in instrumentation used with electricity distribution and transmission systems. These process measurement signals may be delivered by digital communications networks.
    Type: Grant
    Filed: October 9, 2017
    Date of Patent: October 23, 2018
    Assignee: UTILIDATA, INC.
    Inventor: David Gordon Bell
  • Patent number: 10088513
    Abstract: A transformer connection phase determination device includes a processor that executes a process. The process includes: acquiring a power value consumed by at least one consumer connected to a transformer that is connected to a phase corresponding to a combination of two of plural distribution lines, and acquiring respective current values flowing in the plural distribution lines; computing a frequency component of the power value or of a current value caused by the power value, and a frequency component of the respective current values flowing in the plural distribution lines; and computing respective correlation values indicating a correlation between the power value or the current value caused by the power value and the respective current values flowing in the plural distribution lines, using each of the computed frequency components, and determining the phase to which the transformer is connected based on the respective correlation values.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: October 2, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Hironobu Kitajima, Yuta Teranishi
  • Patent number: 10067665
    Abstract: An optical time domain reflectometer includes: an OTDR measurement unit; an event detection unit that detects an event using the measurement result of the OTDR measurement unit; a display unit that displays a plurality of icons indicating events in an event display region AIV and displays information of an event, which is located in a specific region AATT of the event display region AIV, in an information display region AINF; an operation detection unit that detects a swipe operation in the event display region AIV; and an event-of-interest changing unit that scrolls the events displayed in the event display region AIV according to the swipe operation to change the display of the information display region AINF to information corresponding to the event indicated by the icon located in the specific region AATT.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: September 4, 2018
    Assignee: ANRITSU CORPORATION
    Inventors: Taichi Murakami, Yasuhiro Miyake
  • Patent number: 10056186
    Abstract: Methods and apparatus according to the invention include inductive units or apparatus such as magnetic metal detectors comprising multiple electromagnetic coils and circuit boards such as electronic printed circuit boards (PCBs) so that the circuit boards, while containing metallic surfaces and layers, are positioned in such a way as to reduce or eliminate their effect on the metal detector's coils. The apparatus comprising: a plurality of electromagnetic coils and a plurality of circuit boards, and wherein at least one of said circuit boards is positioned so that its thickness direction is orthogonal to the magnetic field of at least one of said coils.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: August 21, 2018
    Assignee: VAYYAR IMAGING LTD
    Inventor: Jonathan Rosenfeld
  • Patent number: 10001522
    Abstract: A method for predicting failure of a light-emitting diode, includes applying a test potential difference across the terminals of the light-emitting diode lower than its minimum drive potential difference, the test potential difference having the same sign as the minimum drive potential difference; measuring the current Ic flowing through the light-emitting diode during the application of the test potential difference; and generating an alarm signal when the measured current Ic exceeds an alarm threshold Ia.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: June 19, 2018
    Assignee: Commissariat A L'Energie Atomique et aux Energies Alternatives
    Inventor: Benoit Hamon
  • Patent number: 10003300
    Abstract: A photovoltaic (PV) system includes module-level power electronic (MLPE) devices that produce energy. The PV system includes a gateway to receive and send data to MLPE devices. The gateway also connects the PV system with a network, such as a local area network, that allows access to the Internet. The gateway provides functionality within the PV system to perform various processes to improve operation of MLPE devices.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: June 19, 2018
    Assignee: SunPower Corporation
    Inventors: Miles Bintz, Patrick L Chapman, Jonathan L Ehlmann, Julianne Frances Haugh, Dale Herman, Brian Kuhn, Kelly Mekechuk, Eric Roesinger
  • Patent number: 9991819
    Abstract: A power conversion system is capable of distinguishing easily and clearly between being interconnected to the power system and being in an isolated operation. The power conversion system converts DC power to AC power to interconnect with a power system and injects reactive power into a grid node for determining an isolated operation, including: a voltage detector that detects an output voltage at the grid node; a current detector that detects an output current at the grid node; a frequency measurement unit that measures a frequency of the output voltage at the grid node; a reactive-power measurement unit that measures reactive power at the grid node; and an isolated-operation determination unit that determines whether or not the power conversion system is in an isolated operation as disconnected from the power system. The isolated-operation determination unit includes a reactive-power-fluctuation determination unit that performs a first isolated-operation determination from the reactive power.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: June 5, 2018
    Assignee: Hitachi Information & Telecommunication Engineering, Ltd.
    Inventors: Tomoyuki Hatakeyama, Akira Kikuchi, Fumikazu Takahashi, Kimiaki Taniguchi, Hirofumi Oyamada
  • Patent number: 9969341
    Abstract: The invention relates to an assistance device (17) for an electrical power generation system (11) of an aircraft, said system (11) comprising a generator (13), a regulator (14) and a contactor (15) comprising contacts and an actuator for opening/closing the contacts which is controlled by said regulator (14) and arranged between the generator (13) and a distribution architecture (12), the assistance device being characterized in that it is connected to at least one power source (18) which is separate from the generator (13) and the regulator (14), and in that it comprises means for closing the contactor which are suitable for connecting the power source (18) to the actuator (23) of the contactor (15) in order to provide the current necessary for closing said contactor (15).
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: May 15, 2018
    Assignee: LABINAL POWER SYSTEMS
    Inventors: Pierre Henrard, Nicolas Carre, Bruno Chapotin
  • Patent number: 9960711
    Abstract: The systems, methods, and devices of the various embodiments provide single phase inverters that may be cooperatively controlled to provide one, two, or three phase unipolar electricity. In an embodiment, a solar panel may be connected to a DC to DC converter and a unipolar power converter. In an embodiment, the unipolar power converter output may be a single phase signal approximating a desired voltage waveform and frequency, offset from the ground electrical potential such that the voltage output signal may be always positive, thus “unipolar”. In an embodiment, the unipolar power output of each string of solar panels may be connected to a dedicated, predetermined phase of a load, such as a three phase grid system. In an embodiment, the DC output of a DC to DC converter may be connected in parallel with other DC to DC converters and other unipolar converters.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: May 1, 2018
    Inventors: Sorin Spanoche, Mika Nuotio, David Stewart
  • Patent number: 9919812
    Abstract: A system and method for monitoring a critical component (e.g., an electrical deicing heater) on an aircraft. A first electrical current is input into the critical component, a second electrical current is returned from the critical component, and an electrical differential current of the critical component is detected. The electrical differential current is the difference between the first electrical current and the second electrical current. An electrical differential current signal is generated from the detected electrical differential current. The electrical differential current signal is compared to a differential current threshold, and precautionary action is triggered based on the comparison. A deterioration trend of the critical component is monitored by tracking variations in the electrical differential current of the critical component over time.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: March 20, 2018
    Assignee: The Boeing Company
    Inventor: Fong Shi
  • Patent number: 9906190
    Abstract: A solar panel soiling monitoring system is provided for measuring soiling losses on a photo-voltaic system. The solar panel monitoring system includes: a soil monitoring panel including a plurality of arranged photovoltaic cells connected in series to one another; a measurement unit in electronic communication with a switchbox for controlling measurements of each of the photovoltaic cells; a communication unit in electronic communication with the measurement unit; and a data storage system in electronic communication with the communication unit including a processor, a computer readable storage medium, and one or more computer programs operable on the data storage system. The data storage system determines soiling conditions of the soil monitoring panel based on measured short circuit currents of each of the plurality of photovoltaic cells of the soil monitoring panels.
    Type: Grant
    Filed: June 6, 2016
    Date of Patent: February 27, 2018
    Inventor: Ryan Bower Jones
  • Patent number: 9906032
    Abstract: An electrical energy transmission system has a three-phase electric current power source generating a three-phase current including three currents of different phases, a three-phase current converting device which converts at least some of the currents, a single-wire electric current transmission line configured to transmit the converted currents to a consumer, and a balancing device configured to balance the electric currents in the three-phase current source and providing thereby a stable operation of the three-phase current power source.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: February 27, 2018
    Assignee: GB ENERGY LLC
    Inventor: Alexander Bronsthein
  • Patent number: 9897640
    Abstract: A fault arc detection method includes: sampling an instantaneous current value of a circuit; using the instantaneous current value to predict a current peak value and, when the predicted current peak value is greater than a predetermined threshold, determining that a first energy fault arc is to appear; and comparing a time domain or frequency domain feature of the instantaneous current value with a reference time domain feature or a reference frequency domain feature of the current of a fault arc of the circuit. When the similarity between the time domain or frequency domain feature and the reference time or reference frequency domain feature of the current of the fault arc reaches a predetermined range, a second energy fault arc is determined to appear. The method and detection device detect the occurrence of a fault arc early and they are able to distinguish different types of fault arcs.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: February 20, 2018
    Assignee: Siemens Aktiengesellschaft
    Inventors: Wei Gang Chen, Feng Du, Sebastian Haas, Yue Zhuo
  • Patent number: 9845012
    Abstract: A method for predicting mechanical failure of a traction motor in a vehicle includes monitoring first characteristics of an electrical signal supplied to a traction motor of a vehicle during a first detection window. The first characteristics represent a first motor electrical signature for the traction motor. The method also includes deriving one or more signature values from a first mathematical model of the first motor electrical signature and predicting a mechanical failure of the traction motor based on the one or more signature values.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: December 19, 2017
    Assignee: General Electric Company
    Inventors: Yinghui Lu, Ajith Kuttannair Kumar
  • Patent number: 9834108
    Abstract: A method and system of notifications for an electric vehicle are provided. A method of notification includes receiving, from an electric vehicle supply equipment (EVSE), a charge for a first vehicle. The method may further include scanning, by the first vehicle, an identifier of a second vehicle parked in tandem with the first vehicle. The method may also include sending, via the EVSE, by the first vehicle, a notification request including the identifier of the second vehicle.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: December 5, 2017
    Assignee: Honda Motor Co., LTD.
    Inventor: Alvin T Yuan
  • Patent number: 9819178
    Abstract: A bypass mechanism for a photovoltaic module which switches out the electronics and switches in a bypass mechanism.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: November 14, 2017
    Assignee: Solaredge Technologies Ltd.
    Inventors: Meir Gazit, Israel Gershman, Ehud Kirmayer, Leon Kupershmidt, Meir Adest
  • Patent number: 9819499
    Abstract: A host voltage monitor is provided for a transceiver. The host voltage monitor may include a comparator, which compares two voltages, one representative of the present host voltage, and the other representative of a threshold voltage level for the host voltage, that may indicate an imminent loss of power. Once the threshold is crossed, an alarm and/or a fault warning data packet may be automatically generated before the power fault causes the transceiver to shut down.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: November 14, 2017
    Assignee: Viavi Solutions Inc.
    Inventors: Michael McCallen, Nick Costantini
  • Patent number: 9800046
    Abstract: A switch assembly is disclosed for use in a circuit configured to carry a current between a first electrical conductor and a second electrical conductor. The switch assembly includes at least a first current path and a second current path, each of which includes an electrical contact which can be selectively connected to or disconnected from the second electrical conductor. At least one of the first current path and the second current path is configured such that it has a frequency-dependent reactance or impedance so as to force or cause current with a frequency which complies with a selected frequency criterion and which flows between the first electrical conductor and the second electrical conductor to flow, at least to a greater extent, via a selected one of the first current path and the second current path.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: October 24, 2017
    Assignee: ABB SCHWEIZ AG
    Inventors: Erik Dore, Ola Jeppsson
  • Patent number: 9800190
    Abstract: Disclosed examples include power conversion systems, methods and computer readable mediums to operate an inverter to drive a motor load through an intervening filter, by computing a speed error value according to a speed reference value and a speed feedback value, computing a torque reference value according to the speed error value, computing a motor current reference value according to the torque reference value, compensating the motor current reference value according to capacitor currents of the output filter using a transfer function representing an output current to input current amplitude vs. frequency behavior of the output filter and the motor load, and controlling the inverter according to the inverter output current reference value.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: October 24, 2017
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Semyon Royak, Jingbo Liu, Jingya Dai, Thomas Nondahl, Ehsan Al-Nabi, Peter B. Schmidt
  • Patent number: 9733285
    Abstract: A load calculation device for determining the maximum electrical load that can be applied to an electrical circuit includes determines the temperature differential (?T) between a section of the electrical circuit and the ambient air temperature in which the section of the electrical circuit resides. The actual electrical load applied to the electrical circuit is also determined as is the design load of the electrical circuit. The maximum electrical load that can be applied to the electrical circuit is then determined based on the temperature differential and the electrical load applied to the electrical circuit and the circuit designed load. The load calculation device may be applied to an electrical joint and may be used to calculate the maximum temperature differential allowed for a given current to be applied at the electrical joint. This is particularly beneficial in connection with detecting and preventing electrical joint failure.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: August 15, 2017
    Assignee: QHI Group Inc.
    Inventors: Ross Kennedy, John Hope
  • Patent number: 9684700
    Abstract: A system includes a Synchrophasor Data Management System (SDMS), in which the SDMS includes a Synchrophasor Processor System (SPS). The SPS includes a Phasor Data Concentrator (PDC) configured to receive a first plurality of inputs from a first Phasor Measurement Unit (PMU), transform at least one of the first plurality of inputs into a first time aligned output by time aligning the at least one of the first plurality of inputs. The SPS further includes a virtual PMU configured to aggregate the first time aligned output into a PMU dataset, in which the SPS is configured to transmit the PMU dataset to a second PMU, an external PDC, a super PDC, or a combination thereof.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: June 20, 2017
    Assignee: General Electric Company
    Inventors: Mitalkumar Gulabrai Kanabar, Oscar Lopez Aguirre, Rodrigo Gutierrez Argandona, Jason Antonio Rodrigues, Mark Gerard Adamiak
  • Patent number: 9678153
    Abstract: The invention relates to a method and to a switching device (4) and a measurement system (1). In the method according to the invention for determining time differences between measurement signals measured by at least two couple measurement devices (2, 3), a time basis signal is first generated for the measurement devices (2, 3). A common reference signal is further generated by a signal generator (5). The common reference signal is fed to measurement signal inputs (8, 9) of the coupled measuring devices (2, 3) via the switching device (4). A measurement signal is then fed to said measurement signal inputs (8, 9) of the coupled measuring devices (2, 3) and the time position of the measurement signals relative to the reference signal is determined in each of the coupled measuring devices (2, 3).
    Type: Grant
    Filed: March 25, 2008
    Date of Patent: June 13, 2017
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Johannes Steffens, Markus Freidhof, Kurt Schmidt, Manfred Mueller
  • Patent number: 9671809
    Abstract: In a reactive power compensation device, a control unit controls a magnitude of reactive power to be output by a reactive power output unit, based on a detected system voltage and one or more control parameters in a first operation mode. In a second operation mode, the control unit changes the magnitude of the reactive power to be output by the reactive power output unit to a power system in an output change period, calculates system impedances of the power system at a plurality of detection time points within the output change period, based on change amounts of the system voltage detected at the plurality of detection time points and corresponding change amounts of the reactive power, and, when a variation in the calculated system impedances is within an acceptable range, adjusts the one or more control parameters, based on the calculated system impedances.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: June 6, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Akihiro Matsuda, Shinichi Ogusa, Masatoshi Takeda
  • Patent number: 9660574
    Abstract: The invention includes a system and method for characterizing and monitoring photovoltaic power systems, and more particularly, to solar monitoring systems that provide notification of fault and performance conditions. Mistaken fault conditions causing false alarms are corrected by use of current weather conditions and performance data to adjust fault detection algorithms and control features.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: May 23, 2017
    Assignee: Also Energy, Inc.
    Inventor: Holden R. Caine
  • Patent number: 9653161
    Abstract: A non-volatile memory device includes a memory cell array including memory cells, each having a resistance value reversibly transitioning among resistance value ranges, a read circuit that, in operation, obtains pieces of resistance value information each relating to the resistance value of one of the memory cells, an arithmetic circuit that, in operation, calculates a binary reference value based on at least a part of the pieces of resistance value information, and a write circuit. In operation, the read circuit selectively assigns, based on the binary reference value, one of two values to each of the pieces of resistance value information. In operation, the write circuit performs a first write operation on a memory cell corresponding to one of the two values among the memory cells.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: May 16, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yuhei Yoshimoto, Yoshikazu Katoh
  • Patent number: 9645185
    Abstract: An electrified vehicle has first and second DC buses and a chassis ground. A leakage detector has a detector switch and detector resistor in series between the first bus and chassis ground. A voltage measured across the detector resistor is proportional to a leakage resistance between the second bus and chassis. An inverter has a plurality of phase legs, each having first and second phase switches coupled between the buses. An AC traction motor has phases coupled to the phase legs. An inverter control circuit receives data messages having a predetermined latency period from the detector identifying a measured leakage resistance. Switching events are detected during which a phase switch is closed for a duration greater than the latency period. An electrical short is indicated if the measured leakage resistance in a data message received during a detected switching event is less than a predetermined threshold.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: May 9, 2017
    Assignee: Ford Global Technologies, LLC
    Inventors: Papiya Bagchi, Benjamin A. Tabatowski-Bush
  • Patent number: 9645192
    Abstract: A ground fault interrupter circuit and a method for operating a ground fault interrupter that includes configuring the ground fault interrupter to perform a plurality of self tests. The ground fault interrupter may be configured to perform a ground fault self test, a grounded-neutral self test, and a trip circuit self test.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: May 9, 2017
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Riley D. Beck, Kent D. Layton, Scott R. Grange
  • Patent number: 9632131
    Abstract: A method for monitoring and measuring an insulation resistance in ungrounded and grounded power supply systems includes the method steps of generating a periodic measuring signal, coupling in the measuring signal between active conductors of the power supply system to be monitored and ground, and detecting and evaluating measured values of the measuring signal. In one embodiment of the invention, the generated measuring signal is formed as a multi-frequency signal by the superposition of a finite number of harmonic oscillations with at least three harmonics. Alternatively, the multi-frequency signal can also be realized by means of a targeted, portioned construction of the signal shape in the time domain on the basis of a binary sequence optimization or by generating the measuring signal by means of the time-division multiplexing method.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: April 25, 2017
    Assignee: BENDER GMBH & CO. KG
    Inventors: Eckhard Broeckmann, Burkhard Macht, Dieter Hackl
  • Patent number: 9606568
    Abstract: A system is described that includes a power bus, a power source configured to supply power to the power bus, and a device receiving at least some of the power supplied by the power source. The device is configured to determine a quality level of the power received from the power bus, and perform an operation of the device according to the quality level of the power. The quality level of the power may be determined on an output from a wavelet transform. For example, the device may apply a wavelet transform to a function based on the power, isolate disturbances from the output of the wavelet transform, and based on the disturbances, determine the quality level of the power.
    Type: Grant
    Filed: February 13, 2015
    Date of Patent: March 28, 2017
    Assignee: Infineon Technologies AG
    Inventors: Thomas Nirmaier, Georg Pelz, Manuel Harrant
  • Patent number: 9601393
    Abstract: Computer-implemented methods, computer-readable media, and systems for selecting one or more parameters for inspection of a wafer are provided.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: March 21, 2017
    Assignee: KLA-Tencor Corp.
    Inventors: Chris Lee, Lisheng Gao, Tao Luo, Kenong Wu, Tommaso Torelli, Michael J. Van Riet, Brian Duffy
  • Patent number: 9581618
    Abstract: A method and apparatus are provided for capturing voltage phase angle data on an alternating current power grid. The method includes periodically making a voltage phase angle measurement at each of a plurality of locations on the alternating current power grid relative to a timing reference signal (e.g., a GPS timing signal) that is available at each location. For each of the locations, the voltage phase angle measurements are stored locally at the location. A trigger event is selected that will be simultaneously detectable at two or more of the locations. The method includes monitoring for the trigger event at each of the plurality of locations. In response to detecting the trigger event at one or more of the locations, a select amount of pre-trigger and post-trigger measurements are transmitted over a data communications network to a pre-designated destination from each location at which the trigger event was detected.
    Type: Grant
    Filed: July 30, 2012
    Date of Patent: February 28, 2017
    Assignee: Power Standards Lab, Inc.
    Inventor: Alexander McEachern
  • Patent number: 9577420
    Abstract: An arc fault circuit interrupter is disclosed. This arc fault circuit interrupter can include any one or more of three different sensors such as a high frequency sensor, and any one of lower frequency sensors such as a current sensor or a differential sensor. The arc fault circuit interrupter can be configured as an in line arc fault circuit interrupter installed in a wall box. In addition, the arc fault circuit interrupter can include a processor configured to determine any one of a series arc fault, or a parallel arc fault.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: February 21, 2017
    Assignee: Leviton Manufacturing Company, Inc.
    Inventors: Michael Ostrovsky, John Libretto, Ronald Jansen, Michael Kamor, Adam Kevelos
  • Patent number: 9577858
    Abstract: A radio frequency communication system includes a radio frequency transmitter having a chirp generator operable to transmit a first chirp signal, and transmit a second chirp signal that is circular shifted relative to the first chirp signal. A receiver receives the first chirp signal and the second chirp signal, such that the proportion of phase offset between the first and second chirp signals is proportional to the frequency offset of the received signals. The first and second chirp signals are despread, and the phase difference between the first and second chirp signals is used to determine a frequency offset of the received first and second chirp signals that is proportional to the phase difference between the first and second chirp signals.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: February 21, 2017
    Assignee: Digi International Inc.
    Inventor: Terry M. Schaffner
  • Patent number: 9558052
    Abstract: A safety system monitors faults in an embedded control system. The embedded control system is modeled to produce one or more model check values by calculating how many clock cycles will pass between an initialization time point and at least one event time point for a specific event. The initialization time point is a certain point in an initialization function of a scheduler in the embedded control system. The at least one event time point is an expected number of clock cycles to pass before a specific event occurs. In operation, the embedded control system is initialized, a current clock cycle counter value is retrieved at a certain point in the initialization, and either an occurrence or an absence of an occurrence of a scheduled event is recognized. A current clock cycle value is recorded upon the recognition, and a mathematic check value is produced from the clock cycle value stored at the certain point in the initialization and the clock cycle value recorded upon the recognition.
    Type: Grant
    Filed: March 18, 2014
    Date of Patent: January 31, 2017
    Assignees: STMicroelectronics International N.V., STMicroelectronics S.R.L.
    Inventors: Om Ranjan, Giampiero Borgonovo, Deepak Baranwal
  • Patent number: 9535134
    Abstract: A method for accurately diagnosing an internal fault of an oil-immersed transformer by analyzing content ratios of dissolved gases generated when the internal fault occurs in the oil-immersed transformer is provided. The method diagnoses the internal fault by analyzing the dissolved gases contained in the insulating oil of the oil-immersed transformer for internal fault diagnosis, wherein the method comprises: a first step of extracting H2, CH4, C2H4, and C2H2 from the dissolved gases; a second step of calculating a content ratio (%) of each dissolved gas from the total content of the four dissolved gases selected from the extracted five dissolved gases; and a third step of determining the internal fault of the oil-immersed transformer for diagnosis corresponding to an internal fault region according to content ratio (%) values of the calculated four dissolved gases and predetermined content ratios (%) of the four dissolved gases.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: January 3, 2017
    Assignee: HYOSUNG CORPORATION
    Inventors: Young-Min Kim, Sung-Jik Kim, Hwang-Dong Seo, Soo-Jin Lee