Having Transistorized Inverter Patents (Class 363/16)
  • Patent number: 11368095
    Abstract: A continuous load high-power flyback converter includes a first transformer having a first primary winding, a first secondary winding, and a first auxiliary winding, and a second transformer having a second primary winding, a second secondary winding, and a second auxiliary winding. The first primary winding and the second primary winding are connected in parallel between a power source and a transistor. The first secondary winding and the second secondary winding are connected in series to a diode and form an output of the continuous load high-power flyback converter. A load is connected between the output and ground. The first auxiliary winding and the second auxiliary winding are connected in series, and used to generate a control signal for the transistor. Connecting the primary windings in parallel and the secondary windings in series reduces the reflected voltage on the transistor for a given output voltage.
    Type: Grant
    Filed: January 29, 2021
    Date of Patent: June 21, 2022
    Assignee: ABL IP HOLDING LLC
    Inventors: Ashish Kumar Gupta, Satish Chandupatla
  • Patent number: 11368009
    Abstract: An electronic control unit (ECU) operates between first and second voltage rails and includes an amplifier circuit and a single current sense circuit coupled to carry a signal to a bus pin and to protect the bus pin from both a short to ground and a short to battery. The single current sense circuit includes a switch circuit that passes the signal to the bus pin and a forward current sensing circuit that provides a second current that is proportional to an output current at the bus pin. The forward current sensing circuit causes the second current to be substantially zero when voltage on the bus pin is above a given value. The single current sense circuit also includes a forward current protection circuit and a reverse current switching circuit that receives the second current and closes a connection to the second voltage when the second current is zero.
    Type: Grant
    Filed: September 14, 2020
    Date of Patent: June 21, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Sri Navaneethakrishnan Easwaran, Timothy Paul Duryea
  • Patent number: 11362592
    Abstract: An AC-DC power converter can include an AC-DC converter stage, such as a flyback converter, configured to receive an AC input voltage and deliver a DC output voltage. The converter can include an active capacitor bank (ACB) coupled to the output of the AC-DC stage. The ACB can include an energy storage capacitor and a plurality of switching devices operable as a bidirectional converter to alternately charge the capacitor from the DC output or discharge the capacitor to maintain output DC voltage regulation. The converter can also include control circuitry responsive to the AC input voltage to selectively: (1) enable the AC-DC stage and operate the switching devices to charge the capacitor from the DC output voltage; (2) and disable the AC-DC stage and operate the switching devices to discharge the capacitor to maintain DC output voltage regulation.
    Type: Grant
    Filed: December 15, 2020
    Date of Patent: June 14, 2022
    Assignee: Apple Inc.
    Inventor: Inhwan Oh
  • Patent number: 11344467
    Abstract: Some embodiments of the present disclosure are directed to a charging apparatus for charging and/or powering a smart or powered crutch device. The crutch may include electronic circuitry as well as on board rechargeable power or energy source, and it may provide access to charge the power source using a charger system. The charger system may be a floor charger configured to receive a portion of the crutch such as the distal tip so as to facilitate the transfer of power from the charger to the crutch. The charger system may also be in the form of a wall charger and/or a portable system.
    Type: Grant
    Filed: December 4, 2016
    Date of Patent: May 31, 2022
    Assignee: ReWalk Robotics LTD.
    Inventor: Roman Rabkin
  • Patent number: 11347253
    Abstract: An electronic device according to an embodiment may include: a plurality of loads, a processor, and a power management circuit configured to provide the plurality of loads with a power, wherein the power management circuit may include a plurality of regulators configured to adjust a voltage of a power received from a power source and output a voltage-adjusted power, a switching circuit configured to connect at least one of the plurality of regulators to at least one of the plurality of loads, a plurality of power sensors each power sensor being configured to measure a magnitude of a power input to each of the plurality of loads, and a controller.
    Type: Grant
    Filed: September 16, 2020
    Date of Patent: May 31, 2022
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jaeseok Park, Sungku Yeo, Youngho Ryu, Jaesun Shin, Jeongman Lee, Chongmin Lee, Hyoseok Han
  • Patent number: 11316510
    Abstract: A method for quickly shutting down a transistor in a switching circuit includes (a) generating a feedback signal associated with current flowing through the transistor, (b) transmitting the feedback signal through an isolating device to a controller, (c) detecting an over-current condition in the switching circuit without transmitting information through the isolating device, and (d) shutting-down the transistor in response to detecting the over-current condition, without transmitting information through the isolating device.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: April 26, 2022
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Arman Hematy, Carmelo Morello
  • Patent number: 11317490
    Abstract: An input detection and protection circuit and an AC electronic ballast for HID lamps, including a power input circuit performing a first limitation to an input surge voltage and then performing a second limitation to a residual voltage from the first input surge voltage limitation; an input voltage acquisition circuit feeding back an input voltage to an MCU chip; a pull-in circuit for a relay connecting to a relay in the power input circuit; a PFC circuit, and an MCU chip controlling the PFC circuit to switch on and off according to voltage values input by the input voltage acquisition circuit, and controlling pull-in and drop-out of the relay through the pull-in circuit for the relay.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: April 26, 2022
    Assignee: Lumlux Corp
    Inventors: Ming Qiu, YuXing Jin, GuanXing Deng
  • Patent number: 11309785
    Abstract: A control circuit for controlling a power switch in a SMPS has a signal jittering circuit and a comparing circuit. The signal jittering circuit adds an overlapping signal into a current sensing signal indicative of current flowing through the power switch or into a current threshold signal, wherein the overlapping signal has a first frequency and an enveloping line of the overlapping signal has a second frequency, and wherein the second frequency is lower than the first frequency. The comparing circuit compares the current sensing signal and the current threshold signal, wherein when the current sensing signal is higher than the current threshold signal, the control circuit c turns off the power switch.
    Type: Grant
    Filed: December 24, 2020
    Date of Patent: April 19, 2022
    Assignee: Shenzhen Kiwi Instruments Corporation
    Inventors: Xiufeng Yu, Bo Zhang, Weixiang Jin
  • Patent number: 11272597
    Abstract: A power supply system includes a converter configured to generate a drive signal based on a rectified input signal for powering a light source, a ripple control system including a voltage-controlled resistor (VCR) coupled to a secondary-side of the converter and configured to dynamically adjust a resistance of the VCR to compensate for ripples in the drive signal, and a controller configured to sense an output voltage of the converter, to calculate a voltage drop across the VCR, and to generate a feedback signal to control the drive signal of the converter based on the sensed output voltage and the calculated voltage drop.
    Type: Grant
    Filed: May 4, 2021
    Date of Patent: March 8, 2022
    Assignee: ERP POWER, LLC
    Inventors: Michael Archer, Louis Chen, James H. Mohan
  • Patent number: 11258368
    Abstract: A control method for regulating the switching frequency of a resonant converter having an input terminal to receive an input voltage and an output terminal to output an output voltage. The control method is sensing the input voltage and adjusting the switching frequency based on the comparison of the input voltage with a reference threshold voltage. When the input voltage is less than the reference threshold voltage, the switching frequency is adjusted to decrease, and when the input voltage is higher than the reference threshold voltage, the switching frequency is adjusted to increase.
    Type: Grant
    Filed: June 10, 2020
    Date of Patent: February 22, 2022
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Jian Jiang, Di Han
  • Patent number: 11258294
    Abstract: Various embodiments include methods and systems for implementing managing a microgrid system. The system may include a plurality of power module clusters, a plurality of uninterruptable power modules, a plurality of bidirectional direct current (DC)/DC converters, and a DC power bus. Each one of the power module clusters of the plurality of power module clusters may be electrically connected in parallel to an uninterruptable power module of the plurality of uninterruptable power modules and a first end of a bidirectional DC/DC converter of the plurality bidirectional DC/DC converters, and a second end of each one of the bidirectional DC/DC converters of the plurality of bidirectional DC/DC converters may be electrically connected to the DC power bus. In some embodiments, the plurality of bidirectional DC/DC converters may be electrically connected to in parallel by the DC power bus or in series via a DC power bus ring.
    Type: Grant
    Filed: November 16, 2020
    Date of Patent: February 22, 2022
    Assignee: BLOOM ENERGY CORPORATION
    Inventors: Prasad Pmsvvsv, Ranganathan Gurunathan
  • Patent number: 11251690
    Abstract: Methods and systems for controlling an output voltage of a resonant converter during a light load condition. One such method includes generating a normalised conduction time of the resonant converter that varies inversely with a switching frequency of the resonant converter by continuing to operate the resonant converter in a Pulse Frequency Modulation mode at a low switching frequency that is similar to the resonant frequency. The method also includes controlling a power level delivered to a secondary winding of a transformer positioned between a resonant tank and an output rectifier of the resonant converter by regulating the normalised conduction time, where the delivered power level is variable based on load conditions. The method further includes generating an output voltage using the output rectifier wherein the magnitude of the output voltage corresponds to the power level delivered to the secondary winding.
    Type: Grant
    Filed: May 22, 2020
    Date of Patent: February 15, 2022
    Inventors: Yu Ling Huang, Gueorgui Iordanov Anguelov
  • Patent number: 11252847
    Abstract: Heat dissipation system, a power converter using such a heat dissipation system, and an associated method of thermal management of the power converter are disclosed. The heat dissipation system includes a condenser, a first cooling loop, and a second cooling loop. The first cooling loop is coupled to the condenser and includes a first two-phase heat transfer device. The second cooling loop is coupled to the condenser and includes a second two-phase heat transfer device. The condenser is disposed above the first and second two-phase heat transfer devices.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: February 15, 2022
    Assignee: General Electric Company
    Inventors: Alistair Martin Waddell, Mark Aaron Chan Chan, Owen Jannis Schelenz, Michael Fernahl
  • Patent number: 11239756
    Abstract: Embodiments of the application disclose a troubleshooting method and device. The method is applicable to an inverter power supply system in the power supply device. The inverter power supply system includes at least two direct current to direct current (DC/DC) power supply modules, and any DC/DC power supply module of the at least two DC/DC power supply modules includes fuses F1 and F2, relays K1 and K2, inductors L1 and L2, switch modules Q1, Q2, and Q3, and direct current bus capacitors C1 and C2. The troubleshooting method includes: if it is detected that any DC/DC power supply module of the at least two DC/DC power supply modules is a faulty module, determining a faulty component in the faulty module; and if the faulty component is a C1 or a C2, and the inverter power supply system is in a battery discharging mode, turning on a Q2 in the faulty module, so that an F1 and an F2 of the faulty module are blown, thereby disconnecting the faulty module from another DC/DC power supply module.
    Type: Grant
    Filed: February 13, 2020
    Date of Patent: February 1, 2022
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Zhengdong Jiang, Bo Xiao
  • Patent number: 11223283
    Abstract: Disclosed is a universal primary-only output current regulation for a flyback converter. A controller determines a peak sense resistor voltage responsive to a desired average output current for the flyback converter during a continuous conduction mode of operation. After a power switch transistor is cycled on, the controller monitors a sense resistor voltage to determine when the sense resistor voltage equals the peak sense resistor voltage. The controller switches off the power switch transistor when the sense resistor voltage equals the peak sense resistor voltage to maintain an average output current for the flyback converter equal to the desired average output current.
    Type: Grant
    Filed: April 20, 2020
    Date of Patent: January 11, 2022
    Assignee: Dialog Semiconductor Inc.
    Inventors: Cong Zheng, Wenduo Liu, Hien Bui
  • Patent number: 11223291
    Abstract: A bipolar bidirectional DC converter comprises at least two valve group series (101, 102) and at least six magnetic elements (103), and said valve group series are divided into a Type-I valve group series (102) and a Type-II valve group series (101) each valve group series (101, 102) comprises a high-voltage DC port, a low-voltage DC port and at least three AC ports, and each AC port is connected to a magnetic element (103); and the other ends of the magnetic elements (103), which are connected to all the AC ports in the same valve group series (101, 102), are connected.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: January 11, 2022
    Assignees: NR ELECTRIC CO., LTD., NR ENGINEERING CO., LTD.
    Inventors: Chen Xie, Zhongfeng Zhang, Jie Tian, Yeyuan Xie, Haiying Li, Yu Wang, Jian Ge
  • Patent number: 11218084
    Abstract: A resonant inverter of a power supply for electric vehicle includes a first resonant capacitor and a switching element cutting off a current flowing in a resonant circuit and generates first alternating-current power from direct-current power. The transformer is included in a part of the resonant circuit, supplies the first alternating-current power generated by the resonant inverter to a first winding, and supplies second alternating-current power after conversion of the first alternating-current power to a load from a second winding. A control unit confines a difference between a resonant frequency of the resonant circuit and a switching frequency of the switching element to a predetermined range to cause that a current flowing in switching of the switching element to at least the first winding or the second winding is equal to or less than a predetermined value and to cause the resonant inverter to perform soft switching.
    Type: Grant
    Filed: April 10, 2020
    Date of Patent: January 4, 2022
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Infrastructure Systems & Solutions Corporation
    Inventors: Yuki Shirasawa, Yasuomi Maki
  • Patent number: 11201539
    Abstract: A power train is described herein comprising a load, a first power supply for providing power to the load, a DC-link capacitor connected to the load, a main converter configured to convert DC power to AC power for powering the load; and pre-charge circuitry. The pre-charge circuitry comprises pre-charge means configured to, during a first, pre-charge phase, prevent said power from being provided to said load but provide power to said DC-link capacitor to charge said DC-link capacitor, and, further configured to, during a second, post-charge phase, allow said power to be provided from said first power supply to said load. A method for providing power to the load is also described herein.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: December 14, 2021
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Grzegorz Popek, Stephen Minshull
  • Patent number: 11201555
    Abstract: Disclosed is a switching power supply device including: a transformer for voltage conversion; a main switching element connected in series to a primary coil; a primary side control circuit that performs on/off control of the main switching element; a synchronous rectification MOS transistor connected in series to a secondary coil; and a secondary side control circuit that performs on/off control of the MOS transistor, wherein the secondary side control circuit includes: an off-timing detection circuit that compares a drain voltage of the MOS transistor with a predetermined threshold voltage, and detects a timing to turn off the MOS transistor; and a threshold voltage setting circuit that sets the threshold voltage, and the threshold voltage setting circuit sets the threshold voltage based on a conduction period of the secondary coil or a period obtained by adding the conduction period to a conduction period of the primary coil.
    Type: Grant
    Filed: February 19, 2020
    Date of Patent: December 14, 2021
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Minoru Kado, Takumi Hyugaji, Takeshi Sato
  • Patent number: 11201546
    Abstract: A power converter including: an output unit outputs a converted voltage; a transformer includes a first primary wiring, second primary wiring, and a secondary wiring; a first switch unit is coupled between first primary wiring and a second node; a delay unit is coupled to a control terminal of first switch unit; a first control unit generates a first control signal according to the converted voltage to control ON/OFF state of the first switch unit via the delay unit; the processing unit, coupled between the input voltage and the first node, receives, stores induced power of first induced voltage and releases the stored energy; and the second control unit generates a second control signal to control ON/OFF state of a second switch unit of processing unit to control receiving or releasing the energy according to the input voltage and induced power of first primary wiring.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: December 14, 2021
    Assignee: FSP TECHNOLOGY INC.
    Inventor: Kuo-Fan Lin
  • Patent number: 11196267
    Abstract: A battery pack including: first and second battery contactors respectively having first ends electrically connected to positive and negative electrode terminals of a battery; first and second charging contactors respectively having first ends electrically connected to second ends of the first and second battery contactors; a second power connector of a charger having first and second output terminals respectively electrically connected to the first and second input terminals being connected to the first power connector; and a control unit configured to, when charging is being performed, diagnose a fault of each of the first charging contactor and the second charging contactor.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: December 7, 2021
    Inventor: Sang-Hyeok Ham
  • Patent number: 11190042
    Abstract: This application discloses wireless charging apparatuses, methods, and systems. One apparatus includes: a direct current to alternating current (DC-to-AC) inverter circuit configured to invert a DC output by a DC power supply to an AC; a compensation circuit configured to compensate the AC output by the DC-to-AC inverter circuit and send the AC obtained after the compensation to a transmitting coil; the transmitting coil configured to receive the AC and generate an AC magnetic field; an impedance adjustment circuit comprising one or more inductive branches; and a controller configured to control on or off of the switch in the inductive branch to change a current flowing out of the lagging bridge arm to enable a controllable switching transistor of the lagging bridge arm to implement zero-voltage switching.
    Type: Grant
    Filed: January 25, 2021
    Date of Patent: November 30, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yunhe Mao, Yanding Liu
  • Patent number: 11189415
    Abstract: A magnetic element includes a magnetic core and a winding. The magnetic core includes a first and second magnetic cover disposed oppositely, and at least one first magnetic column, at least one second magnetic column and at least one common magnetic column disposed between the first and second magnetic covers. The winding includes at least one first winding wound around at least one first magnetic column, and at least one second winding wound around at least one said second magnetic column. A first differential mode inductor is formed with the first winding, the first magnetic column, the first magnetic cover, the common magnetic column and the second magnetic cover. A power inductor or a power transformer is formed with the second winding, the second magnetic column, the first magnetic cover, the common magnetic column and the second magnetic cover.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: November 30, 2021
    Assignee: Delta Electronics (Shanghai) CO., LTD
    Inventors: Zengyi Lu, Haijun Yang, Shaohua Zhu
  • Patent number: 11129254
    Abstract: Disclosed in the present application is a driver for lighting means, preferably light emitting diodes, comprising a charge pump circuit, which is improved based on a common first-stage charge pump circuit. A fifth capacitor is added to connect a power source input end of the charge pump circuit to an LLC or LC circuit, a compensation current is provided for the power source input end using a resonant current generated by a resonant inductance in the LLC or LC circuit, an input angle of a power input current is widened and the input current is smoothed, so as to improve the problems, that a total harmonic distortion is larger and the harmonic does not satisfy the IEC standard, of a single-stage charge pump circuit where the output range is larger.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: September 21, 2021
    Assignee: Tridonic GmbH & Co KG
    Inventors: Qiuxiang Mao, Guoji Zhong, Qinghui Chen, Ruipeng Gao
  • Patent number: 11121622
    Abstract: A control apparatus of a current resonance type switching power supply that has a switching element and generates an output voltage. The control apparatus includes a drive circuit configured to generate a drive signal to drive the switching element of the switching power supply, and a soft-start control circuit connected to the drive circuit, the soft-start control circuit being configured to send a signal to the drive circuit to cause the drive circuit to increment an on-width of the drive signal by a prescribed step per prescribed switching number, to thereby reduce an overshoot of the output voltage when the switching power supply is started.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: September 14, 2021
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Jian Chen, Kiminori Tanaka
  • Patent number: 11114862
    Abstract: In one embodiment, a solar cell installation includes several groups of solar cells. Each group of solar cells has a local power point optimizer configured to control power generation of the group. The local power point optimizer may be configured to determine an optimum operating condition for a corresponding group of solar cells. The local power point optimizer may adjust the operating condition of the group to the optimum operating condition by modulating a transistor, such as by pulse width modulation, to electrically connect and disconnect the group from the installation. The local power point optimizer may be used in conjunction with a global maximum power point tracking module.
    Type: Grant
    Filed: August 6, 2018
    Date of Patent: September 7, 2021
    Assignee: Enphase Energy, Inc.
    Inventors: David L. Klein, Jan Mark Noworolski
  • Patent number: 11108064
    Abstract: A fuel cell system mounted on a vehicle is provided. During intermittent operation of the fuel cell system, if a cell voltage Vc of a fuel cell stack becomes lower than a predetermined threshold voltage V?, an air compressor is operated to supply air to the fuel cell stack at a first predetermined flow rate, and when the cell voltage Vc reaches and stabilizes at a predetermined target voltage V?, air is supplied to the fuel cell stack at a second predetermined flow rate that is higher than the first predetermined flow rate for a certain period of time.
    Type: Grant
    Filed: June 2, 2014
    Date of Patent: August 31, 2021
    Assignees: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hiroyuki Suzuki
  • Patent number: 11075586
    Abstract: A converter is configured for connecting between a solar cell and an inverter configured to convert direct-current power output from the solar cell into alternating current power, and the converter is configured to increase the potential-to-ground at the negative terminal of the solar cell to greater than the potential-to-ground at the negative terminal of the inverter when outputting the direct-current power generated by the solar cell to the inverter side.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: July 27, 2021
    Assignee: OMRON Corporation
    Inventors: Yasuhiro Tsubota, Masao Mabuchi, Takao Mizokami, Kenji Kobayashi
  • Patent number: 11075583
    Abstract: Apparatus for power conversion are provided. One apparatus includes a power converter including an input circuit and an output circuit. The power converter is configured to receive power from a source for providing power at a DC source voltage VS. The power converter is adapted to convert power from the input circuit to the output circuit at a substantially fixed voltage transformation ratio KDC=VOUT/VIN at an output current, wherein VIN is an input voltage and VOUT is an output voltage. The input circuit and at least a portion of the output circuit are connected in series across the source, such that an absolute value of the input voltage VIN applied to the input circuit is approximately equal to the absolute value of the DC source voltage VS minus a number N times the absolute value of the output voltage VOUT, where N is at least 1.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: July 27, 2021
    Assignee: Vicor Corporation
    Inventors: Patrizio Vinciarelli, Andrew D'Amico
  • Patent number: 11063526
    Abstract: Power conversion equipment has a first input terminal and a second input terminal to which an AC input voltage is applied, a plurality of AC-DC converters which are series-connected between the first input terminal and the second input terminal and each of which converts a divided input voltage obtained by dividing the input voltage into a full-wave rectified voltage in a state of being insulated electrically, and a first output terminal and a second output terminal through which the full-wave rectified voltages converted by the plurality of AC-DC converters are output commonly.
    Type: Grant
    Filed: September 9, 2019
    Date of Patent: July 13, 2021
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventor: Yusuke Hayashi
  • Patent number: 11056964
    Abstract: A power supply device has a first output port, a second output port and a power delivery control module. The power delivery control module compares the first output voltage value and the second output voltage value to determine a reference voltage value, and determines the optimized voltage value according to the total output power value, the reference voltage value, and a rated output current of an AC/DC converting module. The power delivery control module controls the AC/DC converting module to convert the AC input voltage to an optimized voltage, so that when the first and second DC/DC converting modules receive the optimized voltage and convert it to the first and second output voltages respectively, the voltage drop is reduced, the conversion loss is reduced, and the conversion efficiency of the power supply device is improved.
    Type: Grant
    Filed: March 13, 2020
    Date of Patent: July 6, 2021
    Assignee: Acbel Polytech Inc.
    Inventor: Chia-An Yeh
  • Patent number: 11018660
    Abstract: Power isolators with multiple selectable feedback modes are described. The power isolators may transfer a power signal from a primary side to a second side. A feedback signal may be provided from the secondary side to the primary side to control generation of the power signal on the primary side. In this manner, the power signal provided to the secondary side may be maintained within desired levels. The feedback signal may be generated by feedback circuitry configurable to operate in different modes, such that the feedback signal may be of differing types depending on which feedback mode is implemented.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: May 25, 2021
    Assignee: Analog Devices Global Unlimited Company
    Inventors: Yue Zhuo, Wenhui Qin, Yingjie Guo, Shaoyu Ma, Tianting Zhao, Baoxing Chen
  • Patent number: 11018590
    Abstract: A control circuit for a flyback converter is configured to adjust a conduction time of an auxiliary switch of the flyback converter in accordance with a drain-source voltage of a main switch of the flyback converter when the main switch is turned on, in order to achieve zero-voltage switching of the main switch. The flyback converter can include: a main power stage having the main switch to control energy storage and transmission of a transformer; and a clamp circuit having an auxiliary switch to provide a release path for releasing energy of leakage inductance of the transformer.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: May 25, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Xiangdong Yang, Xiaoru Xu, Yongjiang Bai, Zhiliang Hu
  • Patent number: 11018529
    Abstract: An apparatus for inductive power transfer (“IPT”) includes an active bridge section with input terminals that receive power from a constant current source, where the active bridge section operates at a fixed switching frequency, a primary resonant capacitor connected in series with an output terminal of the active bridge section, and a primary IPT coil connected in series with the primary resonant capacitor, where power is transferred wirelessly between the primary IPT coil and a secondary IPT coil, and the secondary IPT coil is connected in series with a secondary resonant capacitor, which is connected in series with an output rectifier section that receives power from the secondary IPT coil and comprising output terminals for connection to a load. The apparatus includes a controller that regulates output voltage to the load, where the controller regulates output voltage to the load by controlling switching of the active bridge section.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: May 25, 2021
    Inventors: Anindya Chitta Bagchi, Tarak Saha, Abhilash Kamineni, Regan A. Zane
  • Patent number: 11011969
    Abstract: There is provided a configuration of a switching control circuit for use with a switching power supply which generates an output voltage from an input voltage, the switching control circuit having an intermittent operation mode where an operation period in which a switching element of the switching power supply is switched and a pause period in which the switching element is not switched are repeated. The switching control circuit includes a prohibition part configured to prohibit starting a next operation period until a predetermined period of time elapses from a time that a current operation period starts, in the intermittent operation mode.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: May 18, 2021
    Assignee: Rohm Co., Ltd.
    Inventor: Akinobu Sawada
  • Patent number: 11011979
    Abstract: Provided is a booster circuit capable of adjusting a power conversion capacity in accordance with input power and also of stably performing a boost operation. The booster circuit includes a first voltage detection circuit configured to output as a first control signal a result of comparing an input voltage and a first voltage obtained by dividing an output voltage, a first oscillation circuit configured to be controlled to operate based on the first control signal, and a first switched-capacitor booster circuit configured to operate in accordance with a first clock signal provided from the first oscillation circuit.
    Type: Grant
    Filed: July 16, 2020
    Date of Patent: May 18, 2021
    Assignee: ABLIC INC.
    Inventor: Fumiyasu Utsunomiya
  • Patent number: 11004660
    Abstract: Various RF plasma systems are disclosed that do not require a matching network. In some embodiments, the RF plasma system includes an energy storage capacitor; a switching circuit coupled with the energy storage capacitor, the switching circuit producing a plurality of pulses with a pulse amplitude and a pulse frequency, the pulse amplitude being greater than 100 volts; a resonant circuit coupled with the switching circuit. In some embodiments, the resonant circuit includes: a transformer having a primary side and a secondary side; and at least one of a capacitor, an inductor, and a resistor. In some embodiments, the resonant circuit having a resonant frequency substantially equal to the pulse frequency, and the resonant circuit increases the pulse amplitude to a voltage greater than 2 kV.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: May 11, 2021
    Assignee: Eagle Harbor Technologies, Inc.
    Inventors: James Prager, Timothy Ziemba
  • Patent number: 11005376
    Abstract: A switching power supply controller, including a high-side drive circuit, a low-side drive circuit, a control circuit which supplies a high-side drive signal to the high-side drive circuit, and which supplies a low-side drive signal to the low-side drive circuit, an oscillation circuit which generates an on-trigger signal and an off-trigger signal at a switching frequency corresponding to a voltage signal, and which supplies the on-trigger signal and the off-trigger signal to the control circuit, and a precharge circuit which receives from the control circuit a burst operation signal, indicative of a burst operation in a standby mode, and which supplies for a second period a precharge signal that causes the control circuit to output the low-side drive signal upon detecting that a switching stop period, during which the first voltage signal falls below a threshold voltage, exceeds a first period.
    Type: Grant
    Filed: December 30, 2019
    Date of Patent: May 11, 2021
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Jian Chen
  • Patent number: 10996495
    Abstract: A high-rate high-swing drive circuit applied to a silicon photonic modulator is disclosed. The drive circuit is connected to a drive pre-stage circuit and a modulator load. The drive circuit includes at least one output circuit, and the output circuit includes: a first inverter, a first voltage bias module, a second inverter, a second voltage bias module, and an inductor. The drive circuit formed by using such a circuit connection increases an output swing of a drive while ensuring a high rate.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: May 4, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Wenrui Zhu, David Zhang, Lei Zhao
  • Patent number: 10998826
    Abstract: To achieve an improvement in the power factor of the input into a primary converter in a case of inputting alternating-current (AC) power. A converter is provided with a control unit that performs a switching control such that power is supplied from a primary converter to a secondary converter while keeping a voltage supplied to a load constant, and also such that power is supplied from the primary converter to a tertiary converter while keeping a current supplied to a tertiary capacitor constant.
    Type: Grant
    Filed: February 17, 2020
    Date of Patent: May 4, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Kohzaburoh Murakami
  • Patent number: 10992167
    Abstract: To extend the transmission distance with the voltage supply source and improve the communication performance of PLCs Solution. The power supply circuit includes a step-down DC/DC converter to which a voltage supplied from the power line is input and to which an input voltage is stepped down and output, a step-up/down DC/DC converter to which a voltage output from the step-down DC/DC converter or a voltage supplied from the power line is input and to which the input voltage is stepped up or stepped down and output to the power line communication circuit, a switch circuit for connecting an input of the step-up/down DC/DC converter to an output of the step-down DC/DC converter or power line, a voltage monitoring circuit for monitoring a voltage supplied from the power line, and a control circuit for controlling connection of the switch circuit based on the voltage value of the voltage supplied from the power line.
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: April 27, 2021
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Noriyuki Shinohara, Akira Kuwano
  • Patent number: 10965219
    Abstract: A controller for use in a power converter with multiple outputs includes a discharge detect circuit coupled to receive a voltage signal from a transformer winding of the power converter to output a discharge signal in response to the voltage signal. A multi-output signal process and interface block is coupled to output request signals to the output selection drive and idle ring visibility logic circuit. An output selection drive and idle ring visibility logic circuit is coupled to receive the discharge signal from the discharge detect circuit and the output request signals from the multi-output signal process and interface block. An idle ring detection circuit is coupled to one of the plurality of output switches and coupled to output an idle ring output signal to generate a next request pulse.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: March 30, 2021
    Assignee: Power Integrations, Inc.
    Inventors: Antonius Jacobus Johannes Werner, Manoj Bhasin, Matthew David Waterson, Karl Moore
  • Patent number: 10937388
    Abstract: A method and device are described to increase the light output on specific areas of a display. The display may be part of a High Dynamic Range (HDR) device. The device includes a processor and a power source. The processor is configured to process a received content signal. The power source further includes a circuit configured to receive a request signal from the processor and, in response to the received request signal, adjust the power supply limitation that increases a light output on a first area of a display when the content signal is displayed.
    Type: Grant
    Filed: January 12, 2019
    Date of Patent: March 2, 2021
    Assignee: INTERDIGITAL CE PATENT HOLDINGS
    Inventor: Anton Werner Keller
  • Patent number: 10897206
    Abstract: A switched-mode power supply with near valley switching includes a quasi-resonant converter. The converter includes a switch element that is turned on not only at the valley, but also in a window range of ?tNVW close to the valley, where the voltage across the switch element is at its minimum. This advantageously reduces switching loss and maintains a balance between efficiency and frequency variation.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: January 19, 2021
    Assignee: FAIRCHILD SEMICONDUCTOR CORPORATION
    Inventors: Zhibo Tao, Jung-Sheng Chen, Li Lin, Kai-Fang Wei, Chih-Hsien Hsieh, Hangseok Choi, Yue-Hong Tang
  • Patent number: 10897193
    Abstract: A system includes a switching power supply that includes switch devices configured to provide a regulated output voltage based on an input voltage. A controller is configured to control the switch devices based on a power demand signal. A direct conduction avoidance circuit is configured to provide a direct conduction avoidance signal based on the regulated output voltage exceeding a direct conduction threshold voltage. The direct conduction avoidance signal is combined with a compensation signal to provide the power demand signal to the controller. An override circuit is configured to disable the direct conduction avoidance circuit based on the input voltage of the switching power supply being below an override threshold voltage.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: January 19, 2021
    Assignee: Texas Instruments Incorporated
    Inventor: William James Long
  • Patent number: 10886909
    Abstract: An electric assembly includes an insulated gate bipolar transistor device, a wide-bandgap transistor device electrically connected in parallel with the bipolar transistor device and a control circuit. The control circuit is electrically coupled to a gate terminal of the bipolar transistor device and to a control terminal of the wide-bandgap transistor device. The control circuit is configured to turn on the bipolar transistor device and to turn on the wide-bandgap transistor device at a predefined turn-on delay with respect to a turn-on of the bipolar transistor device.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: January 5, 2021
    Assignee: Infineon Technologies AG
    Inventors: Roman Baburske, Johannes Georg Laven, Thomas Basler
  • Patent number: 10886855
    Abstract: According to some aspects of the present disclosure, resonant converter power supplies and control methods for reducing unbalanced currents in resonant power supplies are disclosed. Example resonant converter power supplies include an input, an output, a transformer, and a bridge circuit coupled between the input and a primary winding of the transformer. The power supply also includes first and second rectifier rails each coupled between a secondary winding of the transformer and the output, and at least one sensor coupled to generate an error signal representing unbalanced currents in the first and second rectifier ails. The power supply further includes a controller configured to receive the error signal, and adjust a duty cycle of at least one of a first switch and a second switch of the bridge circuit based on the error signal to reduce the unbalanced currents in the first and second rectifier rails.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: January 5, 2021
    Assignee: Astec International Limited
    Inventors: Yongtao Xie, Zhanwu Wang, Sudhakarababu Chakkirala
  • Patent number: 10879810
    Abstract: A synchronous rectifier OFF control module and a synchronous rectifying control circuit. The synchronous rectifier OFF control module may receive a zero-cross threshold signal and a drain-source voltage signal indicative of a drain to source voltage of a synchronous rectifier, and to compare the drain-source voltage signal with the zero-cross threshold signal to determine whether the rectifier current flowing through the synchronous rectifier is crossing zero. The synchronous rectifier OFF control module may further receive a peak current detection signal indicative of a peak value of the rectifier current, and to adjust the magnitude of the zero-cross threshold signal to vary in the same direction as the peak value of the rectifier current based on the peak current detection signal. The synchronous rectifier OFF control module may provide more accurate control to the turn OFF moment of the synchronous rectifier and thus can help to reduce power loss.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: December 29, 2020
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: Tianzhu Zhang
  • Patent number: 10873184
    Abstract: A system includes a controller that is configured to generate a node control signal and a plurality of switch control signals, a plurality of programmable emulators, each of the plurality of programmable emulators being configurable as one of a plurality of node types responsive to the node control signal, and a plurality of switches that are programmable to couple ones of the plurality of programmable emulators to each other responsive to the plurality of switch control signals.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: December 22, 2020
    Assignee: University of Tennessee Research Foundation
    Inventors: Fei Wang, Leon M. Tolbert, Yiwei Ma, Kevin Tomsovic, Kai Sun, Shuoting Zhang, Jingxin Wang
  • Patent number: RE49017
    Abstract: Disclosed are a wireless power transmitting apparatus and a method thereof. The wireless power transmitting apparatus wirelessly transmits power to a wireless power receiving apparatus. The wireless power transmitting apparatus detects a wireless power transmission state between the wireless power transmitting apparatus and the wireless power receiving apparatus, and generates a control signal to control transmit power based on the detected wireless power transmission state. The wireless power transmitting apparatus generates the transmit power by using first DC power based on the control signal, and transmits the transmit power to a transmission resonance coil through a transmission induction coil unit based on an electromagnetic induction scheme.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: April 5, 2022
    Assignee: LG INNOTEK CO., LTD.
    Inventor: Su Ho Bae