Impedance Insertion Patents (Class 361/58)
  • Patent number: 10411612
    Abstract: A power generation system in an embodiment includes a power generator, a rectifying and smoothing circuit, a converter, a voltage measurement unit, and a switch. The power generator outputs AC power. The rectifying and smoothing circuit converts the AC power to DC power and smooths the DC power. The voltage measurement unit measures an average voltage of the AC power or a voltage of the smoothed DC power. The converter transforms the smoothed DC power. The switch is disposed between the rectifying and smoothing circuit and the converter, and becomes an ON state when the measured voltage becomes a reference voltage or higher.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: September 10, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Atsuro Oonishi, Hiroshi Takahashi
  • Patent number: 10361555
    Abstract: A device for reducing residual current in an electrical circuit, in particular an electrical low-voltage line, has a residual current sensor and a current measuring unit, wherein an output of the residual current sensor is connected to an input of the current measuring unit. The device has a voltage reducing unit, the voltage reducing unit is connected to an output of the current measuring unit, and the voltage reducing unit is designed to reduce the electrical voltage—subsequently applied to the device—depending on the height of the measured residual current in order to limit the measured residual current to a predeterminable value, in particular 30 mA.
    Type: Grant
    Filed: July 16, 2015
    Date of Patent: July 23, 2019
    Assignee: EATON INTELLIGENT POWER LIMITED
    Inventor: Michael Koch
  • Patent number: 10205313
    Abstract: Two-transistor devices protect electrical circuits from sustained overcurrent conditions. Some cases provide normally-on depletion mode transistors biased into enhancement mode for lower impedance during normal current conditions, and then the transistors are biased into blocking depletion mode during sustained overcurrent conditions to block the current to the circuit. Optionally, the devices have only two terminals and require no auxiliary power to operate. Other cases provide protective circuitry for the transistors' gates, timing circuitry designed to ignore brief nuisance spikes, and/or timing circuitry to delay resetting the device until the current has returned to an acceptable level.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: February 12, 2019
    Assignee: Symptote Technologies, LLC
    Inventor: Mark D. Creech
  • Patent number: 10200028
    Abstract: An electric assembly includes a reverse conducting switching device and a rectifying device. The reverse conducting switching device includes transistor cells for desaturation configured to be, under reverse bias, turned on in a desaturation mode and to be turned off in a saturation mode. The rectifying device is electrically connected anti-parallel to the switching device. In a range of a diode forward current from half of a maximum rating diode current of the switching device to the maximum rating diode current, a diode I/V characteristic of the rectifying device shows a voltage drop across the rectifying device higher than a saturation I/V characteristic of the switching device with the transistor cells for desaturation turned off and lower than a desaturation I/V characteristic of the switching device with the transistor cells for desaturation turned on.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: February 5, 2019
    Assignee: Infineon Technologies AG
    Inventors: Johannes Georg Laven, Roman Baburske, Thomas Basler
  • Patent number: 10184452
    Abstract: A wind power generation system according to the present invention includes: a DC bus; a plurality of feeders connected to the DC bus for transmitting DC powers to the DC bus; a plurality of wind power generators; a plurality of AC/DC converters connected one by one to each of the wind power generators for converting AC powers generated by the connected wind power generators, into DC powers, and outputting the DC powers to the feeders; and a DC breaker and a diode, which serve as a current limiting unit installed on each of the feeders for preventing a DC current from flowing from the DC bus into the feeder.
    Type: Grant
    Filed: September 16, 2014
    Date of Patent: January 22, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kazuyori Tahata, Kunio Kikuchi, Makoto Miyashita, Kenji Kamei, Sho Tokoyoda
  • Patent number: 10164428
    Abstract: The disclosure is related to a voltage-source multi-level converter including a phase unit. The phase unit includes first and second bridge arms, each includes modules and reactor connected in series. In the first bridge arm, a first terminal of first reactor is connected to alternating-current terminal of the phrase unit, a second terminal thereof is connected to a first terminal of the first modules, and second terminal of the first modules is connected to first DC terminal of the phrase unit. In the second bridge arm, a first terminal of the second reactor is connected to the alternating-current terminal, a second terminal thereof is connected to a first terminal of the second modules, and a second terminal of the second modules is connected to second DC terminal of the phrase unit. Then, a parallel fault shunt circuit is connected between the second terminals of the first and second reactors.
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: December 25, 2018
    Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTD
    Inventors: Guorong Shen, Jie Tian, Dongming Cao, Haiying Li, Yunlong Dong, Nannan Wang, Haibin Liu, Yu Lu
  • Patent number: 10151779
    Abstract: The invention relates to a measuring resistor (1), in particular a low-resistance current-measuring resistor, comprising two terminal parts (2, 3) that consist of a conductor material for introducing and discharging a current, and a resistor element (4) that consists of a resistor material, wherein the resistor element (4) is arranged between the two terminal parts (2, 3) in the direction of the current and current flows through the resistor element (4). According to one variant of the invention, the measuring resistor (1) has several pairs of voltage-measuring contacts (7) for measuring the voltage falling across the resistor element (4) in order to be able to compensate metrologically for inhomogeneities in the current density.
    Type: Grant
    Filed: February 17, 2014
    Date of Patent: December 11, 2018
    Assignee: Isabellenhuette Heusler GmbH & Co., LG
    Inventor: Ullrich Hetzler
  • Patent number: 10145888
    Abstract: An electronic device is provided. The device includes a first connector configured to couple with a second connector and including a plurality of contacts separated from each other, and a processor configured to detect an incomplete connection between the first connector and the second connector when an electric current does not flow through at least one of the contacts.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: December 4, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jungchul An, Dohee Kang, Hyun-Woo Sim
  • Patent number: 10141836
    Abstract: A control circuit includes a set of alternating-current (AC) power receiver terminals, a rectification unit, a transistor, a switch, a detection unit, a comparison unit and a logic control circuit. The AC power receiver terminals receive and send external AC power to the rectification unit. The rectification unit outputs an operation voltage accordingly. The transistor is coupled between the rectification unit and the switch. The detection unit is coupled to the rectification unit to generate a first detection voltage and a second detection voltage according to the operation voltage. When the first detection signal is equal to the second detection signal, the comparison unit sends a comparison signal. The logic control circuit turns on the transistor and the switch if the comparison signal still has not been received after a predetermined time interval has elapsed.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: November 27, 2018
    Assignee: WELTREND SEMICONDUCTOR INC.
    Inventors: Ming-Ying Kuo, Yi-Lun Shen, Ren-Yi Chen
  • Patent number: 10096407
    Abstract: A surface mountable over-current protection device comprises a PTC material layer, first and second conductive layers, left and right electrodes, left and right conductive members, and left and right insulating members. The PTC material layer comprises a left notch at a left end and a right notch at a right end. The first conductive layer comprises a primary portion disposed on an upper surface of the PTC material layer and a secondary portion extending over the left notch, and the second conductive layer comprises a primary portion disposed on a lower surface of the PTC material layer and a secondary portion extending over the underside of the right notch. The left conductive member connects to the left electrode and the first conductive layer and isolates from the second conductive layer. The right conductive member connects to the right electrode and the second conductive layer and isolates from the first conductive layer.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: October 9, 2018
    Assignee: POLYTRONICS TECHNOLOGY CORP.
    Inventors: Chun Teng Tseng, Wen Feng Lee, Yung Hsien Chang, Yao Te Chang
  • Patent number: 10090387
    Abstract: An electronic device having at least a first HEMT transistor and bias circuit able to at least reverse bias the first HEMT transistor by applying an electric voltage VSD of a positive value between a source of the first HEMT transistor and a drain of the first HEMT transistor. The first HEMT transistor is able to be ON when a value of an electric voltage VGD between a gate of the first HEMT transistor and the drain of the first HEMT transistor is higher than a value of a threshold voltage Vth of the first HEMT transistor. The electronic device has, during a forward biasing, a behavior similar to that of a forward biased or reverse biased Zener diode.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: October 2, 2018
    Assignees: Commissariat à l'énergie atomique et aux energies alternatives, ALCATEL LUCENT
    Inventor: Rene Escoffier
  • Patent number: 10028403
    Abstract: A board assembly includes a first board. The first board includes a first board connector that is configured to connect to a first baseboard connector receptacle included on a baseboard and a first board component coupled to the first board connector through the first board. The board assembly also includes a second board that is movably coupled to the first board by at least one floating coupling that allows the second board to move relative to the first board. The second board includes a second board connector that is configured to connect to a second baseboard connector receptacle included on the baseboard and a second board component coupled to the second board connector through the second board.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: July 17, 2018
    Assignee: Dell Products L.P.
    Inventors: Corey Dean Hartman, Salvador D. Jimenez, III
  • Patent number: 9853451
    Abstract: A direct current (DC) power system includes a plurality of energy sources supplying power to a plurality of loads via a DC bus having at least one positive rail. The DC bus includes two DC bus subsections and a DC bus separator coupled between the two DC bus subsections. The DC bus separator includes a controllable switch with at least one of its terminals coupled with a terminal of an inductor to provide a current path between the two DC bus subsections during normal operation via the inductor. The controllable switch is switched off to break the current path when a fault on the positive rail is detected. Furthermore, the DC bus separator includes a diode connected in parallel to the inductor and arranged to provide a circulating current path to dissipate an inductor current in the inductor when the controllable switch is switched off.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: December 26, 2017
    Assignee: General Electric Company
    Inventors: Pierluigi Tenca, Christof Martin Sihler
  • Patent number: 9835690
    Abstract: An AC inrush current testing device is disclosure. The AC inrush current testing device includes a grid voltage peak point calculator, a grid voltage period and timing detector, a switch, an autotransformer, and a main relay. The grid voltage period and timing detector is connected to an AC power source and the grid voltage peak point calculator. A movable contact of the switch is connected to the AC power source. A first winding of the autotransformer is connected to the AC power source, a second winding of the autotransformer, and a first stationary contact of the switch. A third winding of the autotransformer is connected to a second stationary contact of the switch and the second winding. The main relay is electrically connected to the grid voltage peak point calculator, the second winding, and the third winding. A method for testing AC inrush current is further disclosed.
    Type: Grant
    Filed: October 16, 2015
    Date of Patent: December 5, 2017
    Assignee: CHICONY POWER TECHNOLOGY CO., LTD.
    Inventors: Wen-Nan Huang, Ming-Tsan Lin, Ching-Guo Chen, Shiu-Hui Lee, Chih-Ming Yu, Hsin-Chang Yu, Chang-Li Hsieh
  • Patent number: 9824838
    Abstract: A commutating circuit breaker that works by progressively inserting increasing resistance into a circuit. This is done via physical motion of a shuttle that is linked into the circuit by at least one set of sliding electrical contacts on the shuttle (“shuttle electrodes”) that connect the power through the moving shuttle to a sequence of different resistive paths with increasing resistance; the motion of the shuttle can be either linear or rotary. A feature of the commutating circuit breaker is that at no point are the shuttle electrodes separated from the matching stationary stator electrodes so as to generate a powerful arc, which minimizes damage to the electrodes. Instead, the current is commutated from one resistive path to the next with small enough changes in resistance at each step that arcing can be suppressed. The variable resistance can either be within the moving shuttle, or the shuttle can comprise a commutating shuttle that moves the current over a series of stationary resistors.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 21, 2017
    Assignee: Alevo International, S.A.
    Inventor: Roger W. Faulkner
  • Patent number: 9806519
    Abstract: An input redundant circuit according to the present disclosure may include: a core power supply unit; a first input port connected to a first input voltage; a second input port connected to a second input voltage; a relay unit connected to the first input port and the second input port to supply one of the first input voltage and the second input voltage to the core power supply unit; and a surge current limiting unit coupled to the relay unit, configured to limit a surge current generated when the relay unit is switched between the first input voltage and the second input voltage.
    Type: Grant
    Filed: October 16, 2014
    Date of Patent: October 31, 2017
    Assignee: ASTEC INTERNATIONAL LIMITED
    Inventor: Chung Yan Cheng
  • Patent number: 9755419
    Abstract: Apparatus and methods for selective protection of an electrical load from disturbances on an input power line. A power protection circuit includes a selectively variable inrush current limiting circuit and a switch for disconnecting the input power line from the load. A control circuit determines that the electrical load is in a first operational state, such as a standby mode or normal operation, or a second operational state, such as full operation at rated current. The power protection circuit provides variable inrush current limiting to the electrical load in response to a first category of disturbances when the electrical load is in the first operational state. The power protection circuit inhibits disconnecting the electrical load in response to a second category of disturbances when the electrical load is in the second operational state. Species of selectively variable current limiting circuits are also described.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: September 5, 2017
    Assignee: INNOVOLT, INC.
    Inventors: Vincent P. Luciani, Eugene Bright
  • Patent number: 9749739
    Abstract: A method of protecting a speaker from thermal damage includes determining a first load current through a first resistor that is coupled to the speaker. The method also includes converting the first load current to a digital value using a second load current through a second resistor as a reference input. The second resistor is part of a circuit that reduces an effect of a temperature coefficient of resistance of the first resistor. The method also includes comparing the digital value of the first load current to a threshold value. The method further includes, responsive to the first load current being larger than the threshold value, generating an instruction to take an action to protect the speaker.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: August 29, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Zhilong Tang, Jingxue Lu
  • Patent number: 9680298
    Abstract: An input redundant circuit according to the present disclosure may include: a core power supply unit; a first input port connected to a first input voltage; a second input port connected to a second input voltage; a relay unit connected to the first input port and the second input port to supply one of the first input voltage and the second input voltage to the core power supply unit; and a surge current limiting unit coupled to the relay unit, configured to limit a surge current generated when the relay unit is switched between the first input voltage and the second input voltage.
    Type: Grant
    Filed: October 16, 2014
    Date of Patent: June 13, 2017
    Assignee: ASTEC INTERNATIONAL LIMITED
    Inventor: Chung Yan Cheng
  • Patent number: 9649997
    Abstract: An apparatus for the location-dependent configuration of a device is coupled to the apparatus. The apparatus has first and second power supply terminals, a locating terminal for locating the apparatus on the basis of a voltage applied to the locating terminal, and a configuration device for configuring the device on the basis of the voltage that is applied to the locating terminal. The first power supply terminal and the locating terminal are formed by the same terminal.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: May 16, 2017
    Assignee: Continental Automotive GmbH
    Inventor: Michael Fink
  • Patent number: 9444248
    Abstract: A control circuit for indirectly limiting a load current which flows through a controllable semiconductor component. The control circuit controls the controllable semiconductor component based upon a measured and/or a calculated load-current-dependent power loss of the semiconductor component. The control circuit can also control the controllable semiconductor component based upon a measured and/or a calculated load-current-dependent component temperature of the controllable semiconductor component. A charging circuit includes a controllable semiconductor component for limiting a load current and has a control circuit in accordance with the invention. A motor vehicle includes an on-board electrical power supply system having a charging circuit in accordance with the invention.
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: September 13, 2016
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Michael Erhart
  • Patent number: 9403497
    Abstract: In one form, the invention relates to a transmission device for transmitting an electric current to a component of a steering wheel of a motor vehicle, including a rotor which is to be arranged on the steering wheel such that it is rotatable along with the steering wheel; a stator which is to be arranged on a component of the vehicle that is stationary as compared to a rotary movement of the steering wheel; at least one conductor element by which the rotor is electrically connected with the stator; and a temperature determination device for determining the temperature of the conductor element or in the region of the conductor element. In another form, the invention also relates to a method for transmitting an electric current to a component of a steering wheel of a motor vehicle.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: August 2, 2016
    Assignee: TAKATA-PETRI AG
    Inventors: Thomas Sauerwein, Uwe Speck, Jürgen Bender, Markus Stollberg, Michael Bischoff
  • Patent number: 9377835
    Abstract: Aspects of the disclosure pertain to a system and method for providing dynamic charge current based on maximum expansion card power. Dynamic monitoring of overall power usage by an expansion card is performed. Based on the dynamic monitoring, power consumption of a charging circuit of the card is dynamically adjusted for maintaining the overall power consumption of the expansion card at or below a pre-determined power limit (e.g., at or below an expansion slot power limit). Further, based on the dynamic monitoring, an amount of charging current provided by a current limiting device of the charging circuit to an energy storage device of the charging circuit is dynamically adjusted.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: June 28, 2016
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Rex C. Wade, Justin R. McCollum
  • Patent number: 9343899
    Abstract: An intrinsically safe redundant regulator circuit includes a plurality of voltage limiting regulators between a regulated rail and a ground rail. Each of the plurality of voltage limiting regulators includes: (i) a shunt regulator component configured to clamp a voltage across the regulated rail and the ground rail to a safety clamp voltage value; and (ii) one or more components, where a property of each of the one or more components is selected to configure the safety clamp voltage value.
    Type: Grant
    Filed: October 3, 2013
    Date of Patent: May 17, 2016
    Assignee: FISHER CONTROLS INTERNATIONAL LLC
    Inventors: Matthew J. Kemp, Davin S. Nicholas, Stephen G. Seberger
  • Patent number: 9226391
    Abstract: Various aspects provide for incorporating a VSDM into a substrate to create an ESD-protected substrate. In some cases, a VSDM is incorporated in a manner that results in the ESD-protected substrate meeting one or more specifications (e.g., thickness, planarity, and the like) for various subsequent processes or applications. Various aspects provide for designing a substrate (e.g., a PCB) incorporating a VSDM, and adjusting one or more aspects of the substrate to design a balanced, ESD-protected substrate. Certain embodiments include molding a substrate having a VSDM layer into a first shape.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: December 29, 2015
    Assignee: LITTELFUSE, INC.
    Inventors: Shurui Shang, Robert Fleming
  • Patent number: 9214816
    Abstract: An integrated power distribution system utilizes a subsea power distribution hub that receives high voltage electricity through an umbilical from a host surface facility. The subsea power distribution hub steps down the high voltage electricity and distributes the appropriate electrical power supply to multiple components of a subsea production system (e.g., in-well pumps, subsea booster pumps, subsea processing units, subsea valves, and subsea sensors) via jumpers. The integrated subsea power distribution system can be utilize to supply electrical power to all of the required process components of the subsea production system from the in-well completion to the surface host facility.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: December 15, 2015
    Assignee: FRAMO ENGINEERING AS
    Inventors: Peter Batho, Jan Elde, Audun Magne Askeland, Jean-Luc Monnac, Dinesh R. Patel
  • Patent number: 9195229
    Abstract: A method of testing a control system including a valve which is operable by a solenoid is disclosed. The method comprises applying a current through a coil of the solenoid, the current being insufficient to cause the solenoid to operate the valve, and monitoring a response of the system to the current.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: November 24, 2015
    Assignee: GE OIL & GAS UK LIMITED
    Inventors: Martin Stokes, Julian Richard Davis
  • Patent number: 9197127
    Abstract: A power supply controller includes a switch circuit to be provided between the power source and the power supply path, the switch circuit switches the power supply from the power source to the load between on and off, and a power-supply-path protection circuit. The power-supply-path protection circuit controls switching operation of the switch circuit according to a power-supply command signal that commands to start or terminate the power supply to the load, to calculate a temperature of the power-supply path, and if the calculated temperature reaches a predetermined upper limit, to inhibit the switch circuit from the power supply, thereby protecting the power-supply path. In a case where the power supply by the switch circuit is inhibited, if the temperature of the power supply path decreases to a predetermined threshold temperature, the power-supply-path protection circuit removes inhibition of the power supply by the switch circuit.
    Type: Grant
    Filed: July 12, 2013
    Date of Patent: November 24, 2015
    Assignees: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Yutaka Higuchi, Seiji Takahashi
  • Patent number: 9197060
    Abstract: An inductive fault current limiter (1) has a normally conducting primary coil assembly (2) with a multiplicity of turns (3) and a superconducting, short-circuited secondary coil assembly (4), wherein the primary coil assembly (2) and the secondary coil assembly (4) are at least substantially coaxial with respect to each other and at least partially interleaved in each other. The primary coil assembly (2) has a first coil section (2a) and a second coil section (2b), wherein the turns (3) of the first coil section (2a) of the primary coil assembly (2) are disposed radially inside the secondary coil assembly (4) and the turns (3) of the second coil section (2b) of the primary coil assembly (2) are disposed radially outside the secondary coil assembly (4). The fault current limiter has an increased inductance ratio.
    Type: Grant
    Filed: September 26, 2013
    Date of Patent: November 24, 2015
    Assignee: Bruker HTS GmbH
    Inventors: Klaus Schlenga, Alexander Usoskin
  • Patent number: 9184614
    Abstract: A circuit for storing electrical energy, in particular for installation within a motor vehicle, comprises at least one capacitor and a temperature-dependent resistor by means of which the at least one capacitor can be charged. The circuit may be included in a motor vehicle. Alternatively, a motor vehicle may be retrofit to include the circuit.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: November 10, 2015
    Assignee: Flextronics International Kft.
    Inventor: Okan Tiritoglu
  • Patent number: 9157897
    Abstract: An ultrasound transmitter including intrinsic output zeroing is disclosed herein. A transmitter for generating ultrasound signals includes a first transmitter output driver and a first transmitter input driver. The first transmitter output driver includes an N-type device serially coupled to a P-type device. The first transmitter input driver includes an N-type device serially coupled to a P-type device. An output of the first transmitter input driver is coupled to an input of the first transmitter output driver. The first transmitter output driver drives an output of the transmitter to a first voltage and the first transmitter input driver drives the output of the transmitter to a second voltage while the first transmitter output driver is disabled.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: October 13, 2015
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Ismail H. Oguzman, Arash Loloee, Suribhotla Rajasekhar, Karthik Vasanth
  • Patent number: 9118180
    Abstract: An input protection circuit includes: a first transistor of a field-effect type coupled in series between an input terminal and an electronic circuit, the input terminal receiving an input voltage, the electronic circuit receiving an input voltage, the first transistor switching to an off-state in a case where the input voltage is higher than a positive power supply voltage of the electronic circuit; a second transistor of a field-effect type coupled in series between the first transistor and the electronic circuit, the second transistor switching to an off-state in a case where the input voltage is lower than the negative power supply voltage of the electronic circuit; and a voltage control circuit configured to maintain gate-source voltages of the first transistor and the second transistor as voltages within a power supply voltage range of the electronic circuit based on the input voltage.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: August 25, 2015
    Assignee: YOKOGAWA ELECTRIC CORPORATION
    Inventors: Kazuhide Yasuda, Hiroaki Hagiwara
  • Patent number: 9112347
    Abstract: A DC grid (100) comprising a plurality of AC/DC converters (105) which are interconnected via DC lines (115) is provided, wherein, in order to limit the effects of a fault in the DC grid, the DC grid is divided into at least two zones (200) by means of at least one current limiter (205) in a manner so that a current limiter is connected in each of the DC line(s) (115z) by which two zones are interconnected. A method of limiting the effects of a fault in a DC grid by dividing the DC grid into at least two zones is also provided.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: August 18, 2015
    Assignee: ABB TECHNOLOGY AG
    Inventors: Bertil Berggren, Jurgen Häfner, Lars-Erik Juhlin, Kerstin Linden, Lidong Zhang
  • Patent number: 9083315
    Abstract: A circuit configuration is disclosed for eliminating EMC interference, and a device includes such a circuit configuration, where a damping member is connected to at least one supply line leading to the consumer or consumers. In at least one embodiment optimal elimination of EMC interference of the electrical consumer or consumers is ensured, and overloading the power supply grid is avoided. To this end, in at least one embodiment the damping member is connected in series with a current-limiting element and can be connected to the consumer in parallel. It is thus possible to compensate for the effect of the current-limiting element and short-circuit said element for the operating state by way of a switch, whereby the element does not cause any loss of power outside of the power circuits and nevertheless has a current-limiting, that is, grid-friendly, effect during the power-up and charging process.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: July 14, 2015
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Christian Oppermann, Bernhard Streich
  • Patent number: 9059541
    Abstract: An electrical connector assembly to be connected to a first control circuit includes a first connector including a switch unit, a second control circuit, and a first contact unit, and a second connector including a detecting circuit and a second contact unit. When connecting the first and second connectors, the connector assembly is disposed sequentially in first and second states. In the second state, where contact pads of the first and second contact units are in respective electrical contacts such that a loop is formed for a trigger signal to be transmitted to the detecting circuit for the latter to generate a detecting signal to the second control circuit, when the first control circuit generates a control signal, the second control circuit controls the switch unit to switch to a conducting state to transmit an electrical power signal to the first control circuit.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: June 16, 2015
    Assignee: Quanta Computer Inc.
    Inventors: Ching-Ming Huang, Hsin Sheng
  • Patent number: 9041426
    Abstract: The present invention provides to a default current testing method of the high voltage direct current converter valve composited by impulse voltage. The technical scheme of the invention composites the symmetrical positive and negative voltage and the impulse into asymmetric positive and negative high voltage, it makes the test valve voltage accurately achieve required peak value at the set time. The test circuit is simple relatively; the high voltage source of the default current test circuit is instead by surge generators. The test method is flexible, safe, and suitable for different DC project converter valves.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: May 26, 2015
    Assignees: STATE GRID SMART GRID RESEARCH INSTITUTE, STATE GRID CORPORATION OF CHINA, CHINA-EPRI ELECTRIC POWER ENGINEERING CO., LTD., CHINA ELECTRIC POWER RESEARCH INSTITUTE
    Inventors: Guang fu Tang, Kunpeng Zha, Jun Yang, Chong Gao
  • Patent number: 9041245
    Abstract: A power supply apparatus includes a converter to convert AC power into DC power, an SMPS to convert the DC power into DC powers desired by loads, a capacitor to interconnect the converter and the SMPS, a PTC element connected to the converter, a first switch connected in parallel with the PTC element, and a second switch connected in series with the first switch. The method includes turning on the second switch to start charging of the capacitor, turning on the first switch to charge the capacitor to a target voltage level, and turning off both the first switch and second switch if a voltage across the capacitor rises over the target voltage level, to discharge the voltage across the capacitor so as to lower the voltage across the capacitor to the target voltage level or lower.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: May 26, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ho Yoon, Dae Hyun Lim, Joong Ki Moon, Sung Wook Kang
  • Patent number: 8989680
    Abstract: According to one aspect, a method is provided for determining a state of a receiver on a transmission line. The method may comprise, for example, evaluating a first voltage arising at a circuit point between an impedance and a transmission line coupled to the impedance, wherein the impedance is coupled between a transmitter and the receiver, and determining a state of the receiver based on the first voltage. According to further aspects, various apparatuses are provided for performing this and other methods.
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: March 24, 2015
    Assignee: Infineon Technologies AG
    Inventor: Andreas Hebenstreit
  • Publication number: 20150043257
    Abstract: Disclosed is an inrush current suppressor circuit of a power supply circuit that supplies stand-by voltage from AC voltage. At a stand-by mode, only a diode and a resistor for suppressing inrush current are provided, and a capacitor provided in common between a stand-by power supply part and a start-up power supply part is charged, so that the inrush current is suppressed at both of sand-by and start-up modes and the number of devices of a circuit and power consumption are reduced.
    Type: Application
    Filed: November 21, 2012
    Publication date: February 12, 2015
    Inventor: Won Seok Nam
  • Patent number: 8891216
    Abstract: A system that detects electrical disconnection of one connector from another connector includes a detection circuitry and a protection circuitry. The detection circuitry detects that a plug connector has been electrically disconnected from a corresponding receptacle connector. In response to the detection, the detection circuitry sends a signal to the protection circuitry. In response to the signal, the protection circuitry lowers or terminates power being supplied to a host device via one of the contacts of the plug connector. This helps to prevent shocks/shorts that may be caused by accidental disconnection of the plug connector.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: November 18, 2014
    Assignee: Apple Inc.
    Inventors: Scott Mullins, Alexei Kosut, Jeffrey J. Terlizzi, Jahan Minoo
  • Publication number: 20140301004
    Abstract: A low-, medium-, or high-voltage voltage switchgear with a circuit breaker or circuit breakers is disclosed which can switch electrical equipment. To protect the switchgear, and the cirucuit breakers in the switchgear against so called spot welding under vacuum atmosphere, such as during a closing operation of a switchgear used, for example, for switching capacitive or inductive equipment or inductive or capacitive current network an inrush current limiter is placed electrically in line or in series with the current path of the circuit breaker.
    Type: Application
    Filed: June 23, 2014
    Publication date: October 9, 2014
    Applicant: ABB Technology AG
    Inventor: Dietmar GENTSCH
  • Patent number: 8853544
    Abstract: Various aspects of the present invention provide a transfer method for peeling off an MIM structure (comprising lower electrode/dielectric layer/upper electrodes) film formed on a supporting substrate and then transferring onto a transfer substrate with sufficiently uniform and low damage. Various aspects of the present invention also provide a thin film element provided with one or more thin film components which are transferred onto a substrate by using said method.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: October 7, 2014
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Ryuichi Kondou, Kenichi Ota
  • Publication number: 20140265861
    Abstract: This relates to a current limiter circuit that can be used in a power conversion system having a triac dimmer. In one example, the power conversion system may be used in an off-line LED driver. The current limiter circuit may be coupled to a power converter of the power conversion system and may operate to reduce the current that the power converter receives from an input line in the event of a power line surge. The current limiter circuit may also be coupled to the triac dimmer and may also operate as a damper for a portion of the half line cycle. The current limiter circuit may dampen the ringing in the triac current for a portion of the half line cycle and may cease dampening for the remaining portion of the half line cycle.
    Type: Application
    Filed: December 13, 2013
    Publication date: September 18, 2014
    Applicant: POWER INTEGRATIONS, INC.
    Inventors: Ricardo L.J. PREGITZER, Jose R. DEL CARMEN, Jr.
  • Publication number: 20140240879
    Abstract: High voltage direct current systems are provided including one or more outlets and an electronic current limiter circuit associated with the one or more outlets. The electronic current limiter circuit is configured to limit current inrush when a connector is plugged into and/or unplugged from the one or more outlets when a direct current bus associated with the one or more outlets is energized so as not to damage the connector; and/or isolate direct current faults and/or excess current draw in a load connected to the one or more outlets so as to protect the system from shutdown.
    Type: Application
    Filed: May 2, 2014
    Publication date: August 28, 2014
    Applicant: Eaton Corporation
    Inventor: Robert William Johnson, JR.
  • Patent number: 8804973
    Abstract: In an example signal clustering apparatus, a feature of a signal is divided into segments. A first feature vector of each segment is calculated, the first feature vector having has a plurality of elements corresponding to each reference model. A value of an element attenuates when a feature of the segment shifts from a center of a distribution of the reference model corresponding to the element. A similarity between two reference models is calculated. A second feature vector of each segment is calculated, the second feature vector having a plurality of elements corresponding to each reference model. A value of an element is a weighted sum and segments of second feature vectors of which the plurality of elements are similar values are clustered to one class.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: August 12, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Makoto Hirohata, Kazunori Imoto, Hisashi Aoki
  • Patent number: 8729739
    Abstract: A circuit breaker comprising first and second JFETs, each comprising a gate, drain and source connection, the JFETs sources being operatively connected to each other to form a common-source connection and adapted to be connected to and operating to open an external circuit when the current flowing through the JFETs exceeds a predetermined threshold, the JFETs' gates, and common-source connection being operatively connected to a gate driver circuit which causes the JFETs to turn off when the predetermined threshold is exceeded; whereupon the current flows through the common-source connection into the second gate and into the gate driver circuit which causes the gate driver circuit to turn off the first and second JFETs and open the circuit breaker. Also claimed is a method of sensing an overloaded circuit comprising leading and trailing JFETs in a circuit that open the circuit and prevent current flow when a predetermined threshold is exceeded.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: May 20, 2014
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Vadim Lubomirsky, Damian Urciuoli
  • Patent number: 8724273
    Abstract: Transient blocking unit reset capability is improved by adding one or more transistors in parallel to one of the main blocking transistors of the circuit. These additional transistors switch off at higher voltages than their corresponding main blocking transistor, and have higher on-resistances than their corresponding main blocking transistor. The resulting transient blocking unit characteristic has two or more different slopes in the negative differential resistance part of the circuit I-V characteristic. This piecewise linear behavior can be exploited to ensure that the circuit I-V characteristic only has a single intersection with a normal load characteristic. By satisfying this condition, automatic reset is ensured, because the combination of the transient blocking unit with any load that is consistent with the normal load characteristic will have only one stable operating point.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: May 13, 2014
    Assignee: Bourns, Inc.
    Inventor: Andrew J. Morrish
  • Publication number: 20140118871
    Abstract: A surface mountable over-current protection device having upper and lower surfaces comprises a PTC device, first and second electrodes, and first and second circuits. The PTC device comprises a PTC material layer and first and second conductive layers. The PTC material layer is disposed between the conductive layers and comprises crystalline polymer and conductive filler dispersed therein. The first electrode comprises a pair of first metal foils, whereas the second electrode comprises a pair of second metal foils. The first circuit connects the first electrode and conductive layer, and has a first planar line extending horizontally. The second circuit connects the second electrode and conductive layer, and has a second planar line extending horizontally. At least one of the planar lines has a thermal resistance sufficient to mitigate heat dissipation by which the over-current protection device undergoes a test at 25° C. and 8 amperes can trip within 60 seconds.
    Type: Application
    Filed: May 23, 2013
    Publication date: May 1, 2014
    Applicant: POLYTRONICS TECHNOLOGY CORP.
    Inventors: Chun Teng TSENG, David Shau Chew Wang, Chi Jen Su
  • Patent number: 8711587
    Abstract: [Problem] To provide a power converter capable of suppressing voltage dropping of the smoothing capacitor and suppressing a rush current at the time of power recovery, [Means for Resolution] When it is determined that a bus voltage Vdc detected by a DC voltage detecting unit 24 is equal to or less than a predetermined reference voltage, a control device 20 allows a DC load control unit 23 to stop an operation of a DC load 30.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: April 29, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Ryuji Momose, Katsuyuki Amano
  • Patent number: RE45734
    Abstract: An inrush current controller for a device has a connector for hot-plugging the device into a source of energization. An impedance has a current input coupled to a first contact of the connector and a current output coupled to the device. The impedance has an impedance control input. An impedance control circuit has a logic input coupling to a second contact of the connector. The impedance control circuit has an impedance control output connected to the impedance control input. The impedance control output forces the impedance OFF during a first time interval after hot-plugging. The logic input triggers a limited inrush at the current input after the first time interval.
    Type: Grant
    Filed: August 17, 2010
    Date of Patent: October 6, 2015
    Assignee: Seagate Technology LLC
    Inventors: Hakam D. Hussein, Wendong Z. Zhang