With Transistor Control Means In The Line Circuit Patents (Class 363/97)
  • Patent number: 11340310
    Abstract: This voltage imbalance assessment method is for a power conversion device comprising a forward converter for rectifying the voltage of a three-phase AC power supply, a smoothing capacitor for smoothing the rectified voltage, a detection unit for detecting the smoothed voltage, and a control unit. The control unit: uses the detected voltage to generate data indicating frequency components; compares, in the data indicating frequency components, the magnitude of the component that is four times the power supply frequency with the magnitude of the component that is six times the power supply frequency; and assesses the voltage imbalance of the three-phase AC power supply on the basis of the comparison.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: May 24, 2022
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Kazushige Hotta, Keisuke Tanabe, Yusuke Arao
  • Patent number: 11323020
    Abstract: A circuit device has a power converter, which includes power semiconductor switches and a capacitor which is connected to a first and a second intermediate circuit conductor in an electrically conductive manner, and having a capacitor discharge device for the electrical discharging of the capacitor. The capacitor discharge device includes an actuation device, an electrical discharge resistor and a first semiconductor switch having a first and a second load current terminal, and having a control terminal. The first load current terminal of the first semiconductor switch is connected to the first intermediate circuit conductor via the discharge resistor, and the second load current terminal of the first semiconductor switch connects to the second intermediate circuit conductor.
    Type: Grant
    Filed: January 23, 2020
    Date of Patent: May 3, 2022
    Assignee: SEMIKRON ELEKTRONIK GMBH & CO. KG
    Inventors: Roland Bittner, Jochen Kraus, Robin Koschinski, Sebastian Hettrich
  • Patent number: 11324100
    Abstract: Provided is a light source apparatus including semiconductor light sources and a current detection resistor connected in series, a power source circuit that allows current to flow thereto, a current detection circuit that detects current flowing to the current detection resistor and outputs a current detection signal, a control circuit that controls the power source circuit such that a voltage of the current detection signal approaches a target value, a bypass circuit connected in parallel to the semiconductor light sources, and including a clamp element having a clamp voltage higher than a maximum voltage during operation of the semiconductor light sources and a bypass resistor connected in series to the clamp element, and allowing current to flow when an open fault occurs in the semiconductor light sources, and detection circuits that respectively detect an open fault in the semiconductor light sources based on an end-to-end voltage of the bypass resistors.
    Type: Grant
    Filed: August 27, 2020
    Date of Patent: May 3, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Kei Ishimaru, Atsushi Yamada
  • Patent number: 11305665
    Abstract: Some embodiments provide a system to protect an electric vehicle charging infrastructure. An electric vehicle charging site may receive Alternating Current (“AC”) power from a power grid and provides Direct Current (“DC”) power to electric vehicles. A sensor spoof observer and controller may receive information from at least two AC current sensors, wherein the observer calculates a grid voltage disturbance using a structure based on an AC filter dynamic model. A system stability assurance platform may: (i) monitor current and voltage to detect resonance, (ii) identify impedance associated with a detected resonance, and (iii) apply a result of an analysis of the identified impedance to an adaptive damping control algorithm. A user interface platform may then provide information about a component of the charging infrastructure being cyber-attacked to a distribution system operator via a graphical user interface display.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: April 19, 2022
    Assignee: General Electric Company
    Inventors: Hanchao Liu, Honggang Monten Wang, Philip Hart, Yichao Zhang
  • Patent number: 11309741
    Abstract: A resonance oscillator circuit is provided to include first and second oscillators. The first oscillator includes a first LC resonator circuit and an amplifier element, and oscillates by shifting a phase of an output voltage with a predetermined phase difference and feeding the output voltage back to the amplifier element. The second oscillator oscillates by generating a gate signal, which has a frequency identical to that of the output voltage, and drives the amplifier element, by shifting the phase of the output voltage with the phase difference and feeding the gate signal back to an input terminal of the amplifier element, by using the amplifier element as a switching element and using the first oscillator as a feedback circuit. The phase difference is a value substantially independent of an inductance of the first LC resonator circuit and a load, to which the output voltage is applied.
    Type: Grant
    Filed: November 30, 2020
    Date of Patent: April 19, 2022
    Assignees: OMRON CORPORATION, NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY
    Inventors: Taichi Mishima, Shingo Nagaoka, Takeshi Uematsu, Hiroo Sekiya
  • Patent number: 11259392
    Abstract: A drive circuit for an LED luminaire is disclosed. The drive circuit includes one or several series of LED light engines. A voltage source with a regulator is connected to the series of LED light engines to forward-bias the light engines. The circuit also includes an integrated circuit driver, which may drive the series of LED light engines using, e.g., pulse-width modulation (PWM). The circuit also includes a feedback circuit connected to the cathode end of the series of LED light engines. The feedback circuit receives a remainder voltage and creates a feedback output signal that upregulates or downregulates the regulator of the voltage source to keep a minimum operating voltage on the integrated circuit driver and also to compensate for variations in forward voltages among LED light engines in the series. A switching element, such as a bipolar junction transistor, protects the driver from high voltages.
    Type: Grant
    Filed: April 29, 2021
    Date of Patent: February 22, 2022
    Assignee: Elemental LED, Inc.
    Inventor: William H. Avery, Jr.
  • Patent number: 11239648
    Abstract: An arc fault detection circuit interruption (AFCI) device includes a high frequency arc noise sensor and an arc fault detection circuit for sensing a high frequency arc noise. The high frequency arc noise sensor is disposed across a hot conductor and a neutral conductor and includes a surge protection device and a surge protection circuit such that the surge protection device protects against a first voltage surge in a first range of thousands to hundreds volts and the surge protection circuit protects against a second voltage surge in a second range of hundreds to few volts. The arc fault detection circuit is coupled in series with the high frequency arc noise sensor. The arc fault detection circuit is coupled to a series combination of a trip solenoid or electromagnet and a silicone-controlled rectifier disposed across the hot conductor and the neutral conductor.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: February 1, 2022
    Assignee: SIEMENS INDUSTRY, INC
    Inventor: Hugh T. Kinsel
  • Patent number: 11201565
    Abstract: A conversion circuit is disclosed. In the conversion circuit, an input terminal includes a positive direct current bus terminal and a negative direct current bus terminal, and an output terminal includes an alternating current output end; a first switch unit includes a flying clamping capacitor and a first converter bridge arm; a second switch unit includes a second converter bridge arm; an output end of the first switch unit and the second switch unit is connected to the alternating current output end; and the first switch unit and the second switch unit are connected to a control module, and switch under control of the control module, so that the conversion circuit converts between a direct current voltage and an alternating current voltage, to output a required alternating current voltage.
    Type: Grant
    Filed: February 7, 2020
    Date of Patent: December 14, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Zhaohui Wang, Lei Shi, Dianbo Fu
  • Patent number: 11159099
    Abstract: A method for pulse-width modulation of a power converter (10) and a power converter (10) are presented. The method comprises determining (110) a modulation index, selecting (120), based on the modulation index, a modulation technique from a plurality of pre-deter-mined modulation techniques, and modulating (130) an output (16) of the power converter (10) by utilizing the selected modulation technique.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: October 26, 2021
    Assignee: Vacon Oy
    Inventors: Nicklas Södö, Oskari Leppäaho, Simo Häkli
  • Patent number: 11128237
    Abstract: In a method for operating an energy converter that couples a first supply network to a second supply network by converting electrical energy via a switch element, the switch element is operated in a switching operation and a supply-network current for one of the supply networks is adjusted depending on a comparison of the supply-network current with a reference current. In a first operating mode for the switching operation, an electrical voltage of one of the supply networks is set by a PWM method on the basis of the comparison, and a second operating mode is provided, in which the switch element is switched when, during the comparison, a difference between the supply-network current and the reference current is greater than a first predefined relative switching value and/or is smaller than a second predefined relative switching value, wherein the first and second operating modes are alternated during the operation.
    Type: Grant
    Filed: May 15, 2019
    Date of Patent: September 21, 2021
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Norbert Benesch, Harald Wiessmann, Franz Bauer
  • Patent number: 11075545
    Abstract: A wireless power transfer system is disclosed. The wireless power transfer system includes a first converting unit for converting a first DC voltage of an input power to a first AC voltage, a contactless power transfer unit for transmitting the input power having the first AC voltage, and a second converting unit for transmitting the power having a second DC voltage corresponding to the first AC voltage to an electric load. Additionally, the wireless power transfer system includes an active voltage tuning unit for controlling the second DC voltage based on a difference between the second DC voltage and a reference voltage and at least one among a difference between the resonant frequency and the constant operating frequency and a difference between a phase angle of the first AC voltage and a phase angle of an AC current.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: July 27, 2021
    Assignee: General Electric Company
    Inventors: Kapil Jha, Arun Kumar Raghunathan, Arvind Kumar Tiwari, Deepak Aravind
  • Patent number: 11065968
    Abstract: An IPT primary or secondary circuit includes a converter connected to a primary energy source and a compensation network. A supplementary energy source is connected to the compensation network and the converter transfers energy between the primary energy source or another IPT primary or secondary circuit and the supplementary energy source.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: July 20, 2021
    Assignee: Auckland UniServices Limited
    Inventors: Martin Neuburger, Duleepa Jayanath Thrimawithana, Udaya Kumara Madawala, Baljit Singh Riar, Steven Ian Ruddell, Gaurav Rajesh Kalra
  • Patent number: 11063584
    Abstract: A switching circuit comprising a transistor and a drive component both for controlling the transistor and also for limiting the power supply current supplied to a load, the drive component being arranged both to receive a control voltage and also: when the control voltage is a disconnection signal, to generate a drive voltage that causes the transistor to occupy a non-conductive state; when the control voltage is a connection signal and the power supply current cannot reach a predefined current threshold, to generate a drive voltage that causes the transistor to occupy saturated conditions; and when the control voltage is a connection signal and the power supply current can reach a predefined current threshold, to generate a drive voltage that causes the transistor to occupy linear conditions, such that the power supply current is regulated so that it does not exceed the predefined current threshold.
    Type: Grant
    Filed: December 12, 2018
    Date of Patent: July 13, 2021
    Assignee: SAFRAN ELECTRONICS & DEFENSE
    Inventors: Olivier Meline, François Guillot
  • Patent number: 11056266
    Abstract: Provided is a filter device to be connected between an AC power source (1) and a PWM converter (2), which includes a first AC reactor (3), a second AC reactor (4) that is connected between the PWM converter (2) and the first AC reactor (3), a filter capacitor (5) whose one end is connected to a connecting portion (9) between the first AC reactor (3) and the second AC reactor (4), and a housing (15) having a cooling air inlet (16) and a cooling air outlet (17) and containing the first AC reactor (3) and the second AC reactor (4), wherein the first AC reactor (3) is disposed upwind of the second AC reactor (4).
    Type: Grant
    Filed: December 26, 2016
    Date of Patent: July 6, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Satoshi Taira
  • Patent number: 11031773
    Abstract: Unique systems, methods, techniques and apparatuses of a distribution system are disclosed. One exemplary embodiment is an alternating current (AC) distribution system including a first substation including a first transformer and a protective device; a first distribution network portion coupled to the first transformer; a second substation; a second distribution network portion; a DC interconnection system coupled between the first distribution network portion and the second distribution network portion; and a control system. The control system is structured to detect a fault in the first transformer or the transmission network, isolate the first distribution network from the fault, determine a set point of the DC interconnection system, and operate the DC interconnection system using the set point so as to transfer a portion of the MVAC from the second distribution network portion to the first distribution network portion.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: June 8, 2021
    Assignee: ABB Power Grids Switzerland AG
    Inventors: Jiuping Pan, Chunming Yuan, Xiaobo Yang, Ritwik Majumder, Bertil Berggren, Frans Dijkhuizen
  • Patent number: 11031881
    Abstract: An output current synthesizer that synthesizes output currents output from a plurality of power inverter circuits converting direct current power to alternating current power and outputs the synthesized output currents as synthesized current having a predetermined frequency, the output current synthesizer includes a pair of conductors which is provided with each of the power inverter circuits and to which the output currents of the power inverter circuits flow, a reactor which is provided on each of the pairs of conductors and generates magnetic flux corresponding to a difference between values of currents flowing to the pairs of conductors to reduce the difference between the values of currents, a pair of conductive members to which the pairs of conductors are connected in parallel, and a pair of output terminals which is provided on the pair of conductive members and output the synthesized currents.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: June 8, 2021
    Assignee: NETUREN CO., LTD.
    Inventors: Takahiko Kanai, Yue Yang
  • Patent number: 11011995
    Abstract: A PWM power supply controllers are typically applied for a single output power supply. For specific applications, like LCD TV's, dual outputs are required. As a preference to only regulate one output, the performance of the system suffers when the outputs are unequally loaded. The disclosure describes a way to balance the outputs, such that when the output are unequally loaded, additional outputs are still accurately regulated.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: May 18, 2021
    Assignee: NXP B.V.
    Inventor: Peter Theodorus Johannes Degen
  • Patent number: 10945321
    Abstract: Provided is a light source apparatus including semiconductor light sources and a current detection resistor connected in series, a power source circuit that allows current to flow thereto, a current detection circuit that detects current flowing to the current detection resistor and outputs a current detection signal, a control circuit that controls the power source circuit such that a voltage of the current detection signal approaches a target value, a bypass circuit connected in parallel to the semiconductor light sources, and including a clamp element having a clamp voltage higher than a maximum voltage during operation of the semiconductor light sources and a bypass resistor connected in series to the clamp element, and allowing current to flow when an open fault occurs in the semiconductor light sources, and detection circuits that respectively detect an open fault in the semiconductor light sources based on an end-to-end voltage of the bypass resistors.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: March 9, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Atsushi Yamada
  • Patent number: 10931197
    Abstract: A power conversion device, mounted on a motor vehicle, has a battery, a power converter, a reactor and a control unit. The power conversion device boosts a battery voltage of the battery, and supplies a boosted voltage to a motor generator mounted on a motor vehicle. The power conversion device transmits electric power generated by the motor generator and supplies the generated electric power to the battery through the power converter. The power converter has an upper arm and a lower arm. The upper arm has upper arm side switching elements. The lower arm has lower arm side switching elements which are directly connected to the respective upper arm side switching elements. At least one of the upper arm side switching elements is composed of a MOS FET and at least one of the lower arm side switching elements is composed of an IGBT.
    Type: Grant
    Filed: August 12, 2019
    Date of Patent: February 23, 2021
    Assignee: DENSO CORPORATION
    Inventors: Tatsuya Murakami, Yuu Yamahira, Kengo Mochiki
  • Patent number: 10893591
    Abstract: A controller includes a voltage detection terminal, a current detection terminal and a voltage sensing terminal. The voltage detection terminal senses a second output voltage. The current detection terminal senses a current of a light source. The second output voltage is sensed prior to the current of the light source. The voltage sensing terminal receives a voltage sensing signal indicative of a first output voltage. The controller adjusts the voltage sensing signal based on the second output voltage, to enable the second output voltage in a preset voltage range; when the second output voltage is in the preset voltage range, the controller adjusts the adjusted voltage sensing signal based on a difference between the current of the light source and a target current value, to enable the current of the light source to maintain the target current value.
    Type: Grant
    Filed: April 10, 2020
    Date of Patent: January 12, 2021
    Assignee: O2Micro, Inc.
    Inventors: Sheng-tai Lee, Kaiping Ran
  • Patent number: 10778001
    Abstract: An overcurrent detection circuit includes a di/dt detection circuit to detect di/dt of a current Ie that flows in an emitter of an IGBT, a control circuit to detect whether the current Ie is an overcurrent based on di/dt and to output a detection result to a driving circuit, and a mask circuit to set a mask period in which an operation of overcurrent determination in the control circuit is masked.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: September 15, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kenta Uchida, Ryosuke Nakagawa
  • Patent number: 10749440
    Abstract: A power conversion device includes an input detector for detecting input parameters of the DC input to the inverter; an output detector for detecting output parameters of the DC output from the power converter device; a duty calculator for calculating a duty for the switching elements of the inverter; a frequency search range calculator for determining an upper limit and a lower limit of a frequency search range for determining the drive frequency after the operating condition is changed, using at least one parameter of the input parameters, the output parameters, and a duty parameter; and a frequency search processor for determining the drive frequency by searching the frequency search range.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: August 18, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hajime Toyoda, Takaaki Takahara, Ryota Kondo, Hiroyasu Iwabuki
  • Patent number: 10749439
    Abstract: Systems and methods are provided for protecting a power conversion system. A system controller includes a two-level protection component and a driving component. The two-level protection component is configured to detect an output power of a power conversion system and generate a protection signal based on at least information associated with the output power. The driving component is configured to generate a drive signal based on at least information associated with the protection signal and output the drive signal to a switch associated with a primary current flowing through a primary winding of the power conversion system. The driving component is further configured to generate the drive signal corresponding to a first switching frequency to generate the output power equal to a first power threshold and generate the drive signal corresponding to a second switching frequency to generate the output power equal to a second power threshold.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: August 18, 2020
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Xiaomin Huang, Huawei Lv, Chao Yao, Qiang Luo, Lieyi Fang
  • Patent number: 10727759
    Abstract: A power inverter configured to convert electrical power from an energy source to electrical power that can be pushed into a utility grid. The power inverter comprises a power train and a controller having an address. The controller is configured to provide gate drive signals to the power inverter for the power inverter to operate. The controller comprises a sensor for measuring electrical power that is pushed into the utility grid, non-volatile memory for storing an accumulated value of the electrical power, and a communication device configured to communicate information from the controller to a device remote from the power inverter. The controller is further configured to execute a smart contract corresponding to the address.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: July 28, 2020
    Assignee: Garrity Power Services LLC
    Inventor: Paul Garrity
  • Patent number: 10541623
    Abstract: A circuit topology and switching scheme for a circuit that includes an input voltage divider configured to provide a divided voltage that may be approximately half of a supply voltage. The circuit also includes a switching circuit with a first half-bridge that includes a first switching node and a second half-bridge that includes a second switching node. One or more switches are configured to connect the divided voltage to the first switching node and the second switching node.
    Type: Grant
    Filed: January 14, 2019
    Date of Patent: January 21, 2020
    Assignee: Infineon Technologies AG
    Inventor: Vratislav Michal
  • Patent number: 10476269
    Abstract: A method for independent real and reactive power flow control without sensing receiving end voltage in a power flow controller (PFC) includes calculating a first reference phase angle, calculating a first reference voltage, modifying the first reference phase angle calculated using a first phasor modifier, calculating a first reference current for a first terminal, calculating a second reference phase angle for current through the first terminal, calculating a second reference voltage across a second CMI by subtracting voltages at the first terminal and a second terminal, and controlling the first CMI and the second CMI for controlling the power flow through the PFC.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: November 12, 2019
    Assignee: Board of Trustees of Michigan State University
    Inventors: Fang Z. Peng, Shuitao Yang, Deepak Gunasekaran
  • Patent number: 10270387
    Abstract: A photovoltaic module includes: a solar cell module including a plurality of solar cells; and a junction box including a capacitor unit attached to one face of the solar cell module and that to stores DC power supplied from the solar cell module, and a dc/dc converter unit to convert the level of the stored DC power and output the same. Thus, power may be easily supplied through the junction box.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: April 23, 2019
    Assignee: LG ELECTRONICS INC.
    Inventors: Kiok Lee, Myonghwan Kim
  • Patent number: 10234880
    Abstract: The present disclosure discloses an active clamp circuit for a power semiconductor switch and a power converter using the same. The active clamp circuit includes: a discharging circuit, a first terminal of the discharging circuit being electrically connected to a collector of the power semiconductor switch; an unidirectional blocking circuit; a first voltage regulator diode connected in series with the unidirectional blocking circuit to form a series branch, a first terminal of the series branch being electrically connected to the collector of the power semiconductor switch; and a resistance-capacitance RC circuit, a first terminal of the RC circuit, a second terminal of the discharging circuit, and a second terminal of the serial circuit being electrically connected, a second terminal of the RC circuit being electrically coupled to a gate of the power semiconductor switch.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: March 19, 2019
    Assignee: Delta Electronics (Shanghai) CO., LTD
    Inventors: Wuying Li, Xin Wang, Lifeng Qiao, Chenyu Lai, Jianping Ying
  • Patent number: 10122260
    Abstract: A switched-mode power converter with current limit circuits for limiting the input current into the power converter and/or the output current is presented. The power converter contains a feedback loop for controlling the output voltage of the converter. A first voltage comparison unit within the feedback loop compares an output voltage with a reference voltage and outputs an error voltage based on the comparison. The power converter also contains a current control unit for limiting the input/output current. The current control unit contains a current comparison unit and a connection unit. The current comparison unit compares the input/output current with a current threshold and outputs an intermediate voltage based on the comparison. The connection unit connects the output of the current comparison unit and the output of the current comparison unit to the output of the first voltage comparison unit if the input/output current exceeds the current threshold.
    Type: Grant
    Filed: April 25, 2016
    Date of Patent: November 6, 2018
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Marcus Weis
  • Patent number: 10003269
    Abstract: A switching power converter is provided that cycles a power switch during a group pulse mode of operation to produce a train of pulses within a group period responsive to a control voltage being within a group mode control voltage range. Depending upon the control voltage, the number of pulses in each train of pulses is varied to provide a linear power delivery to the load.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: June 19, 2018
    Assignee: DIALOG SEMICONDUCTOR INC.
    Inventors: Fuqiang Shi, Kai-Wen Chin, Cong Zheng, Jianming Yao, Yong Li
  • Patent number: 9997991
    Abstract: A switched-mode power converter with current limit circuits for limiting the input current into the power converter and/or the output current is presented. The power converter contains a feedback loop for controlling the output voltage of the converter. A first voltage comparison unit within the feedback loop compares an output voltage with a reference voltage and outputs an error voltage based on the comparison. The power converter also contains a current control unit for limiting the input/output current. The current control unit contains a current comparison unit and a connection unit. The current comparison unit compares the input/output current with a current threshold and outputs an intermediate voltage based on the comparison. The connection unit connects the output of the current comparison unit and the output of the current comparison unit to the output of the first voltage comparison unit if the input/output current exceeds the current threshold.
    Type: Grant
    Filed: April 25, 2016
    Date of Patent: June 12, 2018
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Marcus Weis
  • Patent number: 9991807
    Abstract: Provided is apparatus and a method for driving synchronous rectifiers, which relate to the field of power supplies for communications. The apparatus includes: detection circuits, wherein each of the detection circuits is configured to detect drain and source voltages of one of synchronous rectifiers to obtain a detection signal for indicating a current direction in the one of the synchronous rectifiers; an isolated driving circuit, configured to generate isolated driving signals for driving the synchronous rectifiers according to the detection signals output by the detection circuits; and the synchronous rectifiers, configured to synchronously rectify input signals from a main transformer by using the isolated driving signals. The present disclosure can obtain the isolated driving signals of the synchronous rectifiers simply and effectively, and has a superior protective feature in case of shoot-through and other abnormalities.
    Type: Grant
    Filed: May 7, 2014
    Date of Patent: June 5, 2018
    Assignee: ZTE CORPORATION
    Inventors: Fengfu Du, Jie Fan, Yaoguang Gao
  • Patent number: 9971315
    Abstract: An electronic circuit comprising an ACRF comprising an active component, an energy storage unit, an input port and an output port. The electronic circuit comprises a control unit to control the ACRF. A detector detects a short circuit at the input port or the absence of an energy supply at the input port. The control unit controls the ACRF to function as an ACRF if the detector detects a power supply connected to the input port or that there is no short circuit at the input port, and controls the ACRF to stop functioning as an ACRF and to discharge energy from its energy storage unit to its output port if the detector detects a short circuit at the input port or no power supply connected to the input port.
    Type: Grant
    Filed: April 10, 2012
    Date of Patent: May 15, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Jörgen Olsson, Mikael Appelberg, Martin Svensson
  • Patent number: 9627980
    Abstract: Disclosed are a power conversion apparatus and a photovoltaic module. The power conversion apparatus includes a converter unit configured to convert a direct current (DC) voltage from a solar cell module, a clamp unit configured to limit a surge voltage in the converter unit, and a controller configured to control the converter unit. Through this configuration, the power conversion apparatus is capable of limiting a surge voltage depending on operation of the converter unit.
    Type: Grant
    Filed: February 13, 2015
    Date of Patent: April 18, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Giyob Park, Youngbok Jung, Heungchan Oh
  • Patent number: 9608585
    Abstract: A zero-crossing amplifier unit for use in high speed analog-digital-converters. A gain stage compares a sampling voltage at an input node with a provided threshold voltage to obtain a gain stage output signal. A voltage controlled current source provides a load current depending on a time window between an initial slope and an end slope of the gain stage output signal. A slope control means increases a duration of a rise and/or fall time of at least one of the initial and end slopes of the gain stage output signal.
    Type: Grant
    Filed: January 17, 2014
    Date of Patent: March 28, 2017
    Assignee: International Business Machines Corporation
    Inventors: Lukas Kull, Thomas Toifl
  • Patent number: 9601997
    Abstract: Operation of a switching power converter having an output capacitor having a small equivalent series resistance (ESR) is stabilized and jitter reduced by sensing capacitor current with gain and combining the resulting signal with the output voltage signal to provide a feedback signal to control switching of the power converter. capacitor current can be sensed without interfering with operation of the filter capacitor by providing a branch circuit having a time constant matched to the output or filter capacitor but an arbitrarily high impedance so as to be effectively lossless. The gain provided in the capacitor current signal can be tuned to provide optimally short settling time after load transients; generally within one switching cycle. Matching of time constants and/or tuning of gain can be performed automatically.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: March 21, 2017
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: Yingyi Yan, Pei-Hsin Liu, Fred C. Lee
  • Patent number: 9564820
    Abstract: Switching regulator methods and systems for supplying output current at a regulated voltage level to a load. The regulator has a primary side that is galvanically isolated from a secondary side. The regulator includes a transformer having a primary winding on the primary side and a secondary winding on the secondary side, coupled to a load. A switch, coupled to the primary winding, controls current flow through the primary winding. A first feedback control loop, responsive only to primary side signal values, regulates a constant average voltage at the output node. An optional second feedback control loop, responsive only to primary side signal values, reduces voltage ringing at the output node.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: February 7, 2017
    Assignee: Linear Technology Corporation
    Inventors: Thomas Anthony DiGiacomo, Michael George Negrete
  • Patent number: 9515595
    Abstract: The embodiments described herein include one embodiment that provides a motor drive that includes driver circuitry that controls operation of an inverter in the motor drive to output power to a motor, control circuitry that controls operation of the driver circuitry, and a switched mode power supply that supplies electrical power to the driver circuitry, the control circuitry, or both. The switched mode power supply includes a primary coil, in which a primary controller stores electrical energy in the primary coil by selectively connecting the primary coil to a power source, and a secondary coil electrically isolated from the primary coil, in which the secondary coil outputs electrical power based at least in part on the electrical energy stored in the primary coil, in which a secondary controller controls the electrical power supplied to the driver circuitry, the control circuitry, or both by selectively connecting the secondary coil to a power output of the switched mode power supply.
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: December 6, 2016
    Assignee: Rockwell Automation Asia Pacific Business Center Pte. Ltd.
    Inventor: Clare Siew Ling Loke
  • Patent number: 9407155
    Abstract: A controller of an isolated switching converter includes an error amplifying circuit, a modulation signal generator, a first comparison circuit, a primary off detection circuit, a secondary logic circuit, an isolation circuit and a primary logic circuit. The error amplifying circuit generates a compensation signal based on the difference between a reference signal and a feedback signal. The first comparison circuit compares the compensation signal with a modulation signal generated by the modulation signal generator and generates a first comparison signal. The primary off detection circuit detects whether the primary switch is off and generates a primary off detection signal. The secondary logic circuit generates a secondary control signal to control the secondary switch based on the first comparison signal and the primary off detection signal. The isolation circuit receives the first comparison signal and generates a synchronous signal electrically isolated from the first comparison signal.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: August 2, 2016
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Siran Wang, Eric Yang, John Wiggenhorn, Qiming Zhao
  • Patent number: 9397609
    Abstract: A photovoltaic module includes: a solar cell module including a plurality of solar cells; and a junction box including a capacitor unit attached to one face of the solar cell module and that to stores DC power supplied from the solar cell module, and a dc/dc converter unit to convert the level of the stored DC power and output the same. Thus, power may be easily supplied through the junction box.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: July 19, 2016
    Assignee: LG ELECTRONICS INC.
    Inventors: Kiok Lee, Myonghwan Kim
  • Patent number: 9397583
    Abstract: An inverter control is used to control the output of a distributed power generating station, such as a photovoltaic (PV) solar power station, connected to a power grid. The power station is connected to an inverter output. Pulse width modulation is used to shape the output in order to maximize power output within power quality parameters and provides control of a switching frequency of the inverter responsive to a sensed parameter. The technique allows an increase in output efficiency and provides for adjustment of power output to meet power quality parameters to an extent required in order to connect to the power grid.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: July 19, 2016
    Inventors: William L Erdman, Jackson Moore
  • Patent number: 9385628
    Abstract: An inverter comprises a first boost apparatus, a second boost apparatus, a first converting stage coupled to the first boost apparatus, wherein the first converting stage is configured such that a first three-level conductive path is formed when a voltage at a dc source is greater than an instantaneous value of a voltage at an output of the inverter and a first five-level conductive path is formed when the instantaneous value of the voltage at the output of inverter is greater than the voltage at the dc source.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: July 5, 2016
    Assignee: Futurewei Technologies, Inc.
    Inventor: Dianbo Fu
  • Patent number: 9357595
    Abstract: A light emitting diode driver includes a power supplying unit receiving an alternating current (AC) power and outputting a transformed power according to a predetermined ratio, a rectifying unit rectifying the output power from the power supplying unit, and a double voltage unit receiving the rectified power from the rectifying unit and generating an output voltage such that the level of the output voltage is variable, and has constant duty and frequency thereof even the variance of the voltage level.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: May 31, 2016
    Assignee: Solum Co., Ltd.
    Inventors: Keun Wook Lee, Byoung Woo Ryu
  • Patent number: 9350192
    Abstract: An on-board charger for charging a battery of an eco-friendly vehicle and a method for charging a battery using the on-board charger are provided. The on board charger reduces an output current ripple by improving a snubber circuit unit of the on-board charger for charging a battery in plug-in hybrid and electric vehicles. In addition, the on-board charger for charging a battery of an eco-friendly vehicle reduces a surge voltage generated in a rectifier diode and reduces an output current ripple by arranging two capacitors and three diodes in a transformer secondary rectifier of the on-board charger.
    Type: Grant
    Filed: October 28, 2013
    Date of Patent: May 24, 2016
    Assignee: Hyundai Motor Company
    Inventors: Dae Woo Lee, Byeong Seob Song, Jin Young Yang, Woo Young Lee
  • Patent number: 9343189
    Abstract: Provided herein is a fusion energy extraction circuit (FEEC) device having a grid-tied bidirectional converter and a resonant converter. The resonant converter can include an inverse cyclotron converter with two or more or quadruple plates and a plurality of circuit switches. The bidirectional converter can include a three-phase grid-tied converter. The FEEC device is capable of decelerating plasma particle beams, thereby extracting the energy from the deceleration, converting the extracted energy to electric energy, and sending the electric energy to a power grid.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: May 17, 2016
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Keyue Smedley, Frank J. Wessel, Mingying Gu, In Wha Jeong
  • Patent number: 9331586
    Abstract: A controller and a method for controlling a power converter includes a sample block coupled to generate a first, second, and third sample by sampling an input sense signal that is representative of an input voltage of the power converter. An enable signal is asserted when a first difference between the first sample and the second sample exceeds a first threshold. An edge signal is asserted when both the enable signal is asserted and a second difference between the first sample and the third sample exceeds a second threshold. A drive circuit is coupled to output a drive signal in response to the edge signal. The drive signal is for controlling a switch coupled to regulate an output of the power converter.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: May 3, 2016
    Assignee: Power Integrations, Inc.
    Inventors: Mingming Mao, Tiziano Pastore, Ricardo Luis Janezic Pregitzer, Peter Vaughan
  • Patent number: 9331583
    Abstract: A switch mode power supply having an output terminal configured to provide an output voltage, the switch mode power supply has a first switch and a control circuit. The control circuit is configured to provide a switching control signal to control the first switch. The control circuit is configured to provide the switching control signal based on a first pulse signal having a first frequency and a second frequency for a light load condition, and the control circuit is configured to provide the switching control signal based on a second pulse signal for a non-light load condition.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: May 3, 2016
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Junming Zhang, Hao Long, Hui Li
  • Patent number: 9312746
    Abstract: A DC/DC converter system includes gate control circuitry, a transformer, a second stage, and soft start control circuitry. The gate control circuitry is configured to generate a first and a second gate control signal configured to open and close first and second switches of an inverter circuitry, respectively, to generate an AC signal from a DC input signal. The transformer transforms the AC signal and the second stage rectifies the AC signal to a DC output signal. The soft start control circuitry generates a signal to delay a closing of the first switch during an initial portion (Td) of a first cycle of the first switch. A method of soft-starting a DC/DC converter includes generating first and second gate control signals and delaying closing of the first switch during Td.
    Type: Grant
    Filed: April 23, 2012
    Date of Patent: April 12, 2016
    Assignee: Fairchild Semiconductor Corporation
    Inventor: Hangseok Choi
  • Patent number: 9285848
    Abstract: Provided is a power reception device in which power consumption at the time of wireless power supply is reduced. A power reception device is provided with a power reception control device capable of temporarily stopping supply of power supply voltage to a communication control unit for controlling communication in a break period of communication intermittently performed between a power transmission device and a power reception device. In the structure, a clock signal is generated on the basis of a power receiving signal transmitted from the power transmission device, and a period of communication intermittently performed can be measured using the clock signal. Further, a structure may be employed in which supply of power supply voltage to the communication unit in the power reception control device can be stopped in the break period of the communication.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: March 15, 2016
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Misako Miwa, Yutaka Shionoiri
  • Patent number: 9281753
    Abstract: A resonant power converter system includes an output load and a rectifier stage that provides a DC output voltage to the output load from an AC intermediate voltage. The resonant power converter system also includes a resonant inverter stage that provides the AC intermediate voltage from a DC input voltage, wherein an inverter gain is controlled by switching between full-bridge and half-bridge topologies based on an external variable of the resonant power converter system. The resonant power converter system further includes a controller that controls the resonant power converter system. Additionally, a method of operating a power converter includes rectifying an AC intermediate voltage to provide a DC output voltage and providing the AC intermediate voltage by inverting a DC input voltage, wherein an inversion gain of the AC intermediate voltage is controlled by switching between full-bridge and half-bridge inversion topologies based on an external variable.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: March 8, 2016
    Assignee: General Electric Company
    Inventor: Raghothama Reddy