Diode Patents (Class 363/126)
  • Patent number: 10298148
    Abstract: Provided are: a smoothing capacitor connected in parallel to the DC power source; a bridge circuit including switching elements for converting DC power to AC power, flywheel diodes connected in reversely parallel, and flywheel-and-separation diodes connected in series to the flywheel diodes and serving concurrently as flywheel and separation diodes; an interconnection reactor on an output side, provided on AC output lines connecting the bridge circuit and an AC power source; and a separation circuit for separating the smoothing capacitor and the interconnection reactor from each other during a flywheel period of the flywheel diodes. The separation circuit includes separation switching elements and the flywheel-and-separation diodes. The separation switching elements are respectively connected between the two AC output lines and two series connection points between the flywheel diodes and the flywheel-and-separation diodes, so as to short-circuit the AC output lines.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: May 21, 2019
    Assignee: TABUCHI ELECTRIC CO., LTD.
    Inventor: Hidehiko Sugimoto
  • Patent number: 10291134
    Abstract: The anti-windup circuit generally has a voltage clamping device in series with a current limiting device operatively connectable to the output current path of a feedback compensator; the feedback compensator being part of a switch-mode power supply (SMPS) having an input voltage source and a load and generating constrained control values required to generate control on-off actions for tight power regulation. The inclusion of the disclosed anti-windup circuit in an SMPS may lead to hardware based overvoltage protection, reduced overall size and faster response to load changes.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: May 14, 2019
    Assignee: Silanna Asia Pte Ltd
    Inventor: Aleksandar Radic
  • Patent number: 10243475
    Abstract: A power conversion device includes a low-pass filter, a second inductor, a first switch, a third switch, a second capacitor, and a controller. The low-pass filter is configured for direct coupling to an alternating current power source. The first switch is connected in series with a second switch, a first connection point. The third switch is connected in series with a fourth switch, a second connection point. The second capacitor is coupled to the first switch, the second switch, the third switch, and the fourth switch. The controller turns on and off the first, the second, the third, and the fourth switches based on a voltage of the alternating current power source directly coupled to the low-pass filter, a circuit current through the second inductor, a voltage across the second capacitor, and an average output voltage of the load circuit.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: March 26, 2019
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Yutaka Usami
  • Patent number: 10243455
    Abstract: The present invention provides a bidirectional DC-DC converter. The bidirectional DC-DC converter includes a first switching tube connected in antiparallel to a first diode; a second switching tube connected in antiparallel to a second diode; a third switching tube connected in antiparallel to a third diode; a fourth switching tube connected in antiparallel to a fourth diode; and a first inductor and a second inductor, where an anode of the first diode and a cathode of the second diode are connected to form a first node, an anode of the second diode and a cathode of the third diode are connected to a neutral point, an anode of the third diode and a cathode of the fourth diode are connected to form a second node, and one end of the first inductor and one end of the second inductor are respectively connected to the first node and the second node. The bidirectional DC-DC converter in the present invention has high conversion efficiency.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: March 26, 2019
    Assignee: SANTAK ELECTRONIC (SHENZHEN) CO., LTD.
    Inventors: David Zheng, Zhongyong Xu, Zhiwei Liao, Yusong Ding, Zhiwu Wang
  • Patent number: 10193464
    Abstract: A DC-DC converter includes: an output terminal, wherein the output terminal has a first output terminal pin and a second output terminal pin; a number of rectifier elements; a voltage limiting unit having an electrical energy store, wherein the voltage limiting unit is designed to limit voltages across the rectifier elements; and a clocked energy regulator unit which is designed to regulate at a setpoint value energy which is stored in the electrical energy store.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: January 29, 2019
    Assignee: Schmidhauser AG
    Inventor: Dirk Schekulin
  • Patent number: 10193437
    Abstract: In one form, a bridgeless AC-DC converter includes a totem pole network having a first input adapted to be coupled to a second terminal of an AC voltage source, a second input adapted to be coupled to a first terminal of the AC voltage source through an inductor, an output terminal for providing an output voltage, and a return terminal, an output capacitor coupled between the output terminal and an output ground terminal, a sense element coupled between the return terminal and the output ground terminal, and a controller circuit coupled to the return terminal of the totem pole network. The controller circuit modulates an on time of an active switch in the totem pole network on a cycle-by-cycle basis by shortening the on time corresponding to an amount of time a current sense signal derived from a current through the sense element exceeds a current limit threshold.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: January 29, 2019
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Ajay Karthik Hari, Nikhilesh S. Kamath
  • Patent number: 10193581
    Abstract: A galvanic isolation circuit is formed by a differential transformer having primary and secondary windings for transmission of signals over a carrier between the primary and the secondary windings of the transformer. A galvanic isolation oxide layer is provide between the primary and secondary windings. Each winding includes include a center tap providing a low-impedance paths for dc and low frequency components of common-mode currents through the differential transformer. A pass-band stage is coupled to the secondary winding of the transformer and configured to permit propagation of signals over said carrier through the pass-band amplifier stage while providing for a rejection of common-mode noise.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: January 29, 2019
    Assignee: STMicroelectronics S.r.l.
    Inventors: Egidio Ragonese, Nunzio Spina, Alessandro Parisi, Pierpaolo Lombardo, Nunzio Greco, Giuseppe Palmisano
  • Patent number: 10193471
    Abstract: An insulated DC/DC converter includes: a transformer; a switching transistor; a rectifier circuit; a photocoupler; a feedback circuit configured to drive a light emitting element of the photocoupler such that an output voltage of the DC/DC converter approaches a target voltage; a primary side controller having a feedback terminal which is connected to a light receiving element of the photocoupler and receives a feedback signal from the photocoupler, a zero current detection terminal which receives a zero current detection signal corresponding to a voltage generated at one end of an auxiliary winding of the transformer, and a pulse modulator of a quasi-resonant mode configured to generate a pulse signal depending on the feedback signal and the zero current detection signal; and a starting control circuit which, in start-up of the DC/DC converter, electrically affects the zero current detection terminal such that an OFF time of the switching transistor lengthens.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: January 29, 2019
    Assignee: ROHM CO., LTD.
    Inventor: Hiroki Kikuchi
  • Patent number: 10186986
    Abstract: First and second semiconductor main-elements, each having a control electrode and a load path, the load paths connected in series between first and second supply nodes, are connected with each other via a first common node. Third and fourth semiconductor main-elements, each having a control electrode and a load path, the load paths connected in series and between a third supply node and the second supply node, are connected with each other via a second common node. A fifth semiconductor main-element has a control electrode and a load path operatively connected between the first common node and an output node. A sixth semiconductor main-element has a control electrode and a load path operatively connected between the second common node and the output node. At least two of the controllable semiconductor main-elements each include a plurality of identical controllable semiconductor subcomponents.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: January 22, 2019
    Assignee: Infineon Technologies AG
    Inventor: Christian Robert Mueller
  • Patent number: 10186981
    Abstract: A solid state light source driver circuit that operates in either a buck convertor or a boost convertor configuration is provided. The driver circuit includes a controller, a boost switch circuit and a buck switch circuit, each coupled to the controller, and a feedback circuit, coupled to the light source. The feedback circuit provides feedback to the controller, representing a DC output of the driver circuit. The controller controls the boost switch circuit and the buck switch circuit in response to the feedback signal, to regulate current to the light source. The controller places the driver circuit in its boost converter configuration when the DC output is less than a rectified AC voltage coupled to the driver circuit at an input node. The controller places the driver circuit in its buck converter configuration when the DC output is greater than the rectified AC voltage at the input node.
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: January 22, 2019
    Assignee: OSRAM SYLVANIA Inc.
    Inventor: Fred Palmer
  • Patent number: 10186881
    Abstract: Methods and systems for regulating charging port attach and detach in an electronic device configured to receive a charging current from a charging port are provided. An example method includes automatically detecting a detach from the charging port. The method may further include automatically lowering a current limit associated with the charging current. The method may further include if during a predetermined wait time an attach to the charging port is detected, then ignoring the detach from the charging port and allowing the charging current to charge the electronic device at the lower current limit associated with the charging current. The method may further include if during the predetermined wait time the attach to the charging port is not detected, then initiating a charging port detach process.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: January 22, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Kendall C. York, Adam M. Mahood
  • Patent number: 10177678
    Abstract: Arrangements (1) for buffering energy comprise buffer capacitor circuits (10) with one or more buffer capacitors (11), first circuits (20) for guiding charging currents for charging the buffer capacitor circuits (10), and second circuits (30) with current source circuits (31-34) for defining amplitudes of de-charging currents for de-charging the buffer capacitor circuits (10), to better control the de-charging of the buffer capacitor circuits (10). The second circuits (30) may further comprise trigger circuits (51-53) for bringing the current source circuits (31-34) into activated modes, and latch circuits (61-63) for latching the current source circuits (31-34). The arrangements (1) may further comprise smoothing capacitor circuits (40) with one or more smoothing capacitors (41). The buffer capacitor circuits (10) may be coupled serially to the first circuits (20), and the first and second circuits (20, 30) may be coupled in parallel to each other.
    Type: Grant
    Filed: January 8, 2015
    Date of Patent: January 8, 2019
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: Guy Louis Paul De Bondt, Georg Sauerländer, Christian Hattrup
  • Patent number: 10152026
    Abstract: An electronic device including: a calculation unit configured to generate a signal representative of a physical magnitude, for a motor driving a display device, the motor including two terminals, one positive and one negative, via which the calculation unit controls the motor; at least one shock detection circuit connected between the calculation unit and one terminal of the motor for detection of an external shock applied to the motor. The shock detection circuit includes a comparison part comparing an induced voltage generated in the motor following a shock to a predetermined reference voltage to identify a shock, and a selection part.
    Type: Grant
    Filed: September 3, 2015
    Date of Patent: December 11, 2018
    Assignee: EM Microelectronic-Marin SA
    Inventors: Yves Godat, Nicolas Jeannet
  • Patent number: 10148193
    Abstract: A power supply unit includes a transformer including a primary winding that receives an alternating-current voltage and a secondary winding including a first end electrically connected to ground, a positive-side rectification circuit including a diode electrically connected to a second end of the secondary winding, an anode of which is electrically connected to the second end, and a cathode of which is electrically connected to a positive-side output terminal, a negative-side rectification circuit including a diode electrically connected to the second end of the secondary winding, a cathode of which is electrically connected to the second end, and an anode of which is electrically connected to a negative-side output terminal, and a capacitor provided on a path from a node between the second end of the secondary winding and the positive-side rectification circuit and the negative-side rectification circuit to the ground through the secondary winding.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: December 4, 2018
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Takashi Kurokawa
  • Patent number: 10148093
    Abstract: A number of DC-AC microinverters driven by separate photovoltaic sub-arrays are physically combined to use common components such as a common, common-mode choke. Each microinverter is controlled by a common switching controller to produce a portion of the desired output such that ripple on the combined output is minimized, and each microinverter produces a common mode signal on its associated sub-array equal in frequency to the desired AC output frequency.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: December 4, 2018
    Assignee: KOOLBRIDGE SOLAR, INC.
    Inventor: Paul Wilkinson Dent
  • Patent number: 10141741
    Abstract: A control unit for an active filter for reducing resonance in an electric system is provided. The electric system comprises a power source distributing an alternating current to an AC conductor connected to a power consuming unit for distributing the AC to the power consuming unit. The active filter comprises a DC power source and a DC conductor connecting the DC power source to the AC conductor. The control unit comprises: a voltage measurement unit adapter to create a voltage signal on the basis of a measured voltage; a computing unit adapted to compute, using a biquadratic filter, a first compensating current on the basis of the voltage signal for reducing resonance in the electric system; and a switching system placed between the DC power source and the DC conductor for creating the calculated first compensating current.
    Type: Grant
    Filed: November 22, 2012
    Date of Patent: November 27, 2018
    Assignee: COMSYS AB
    Inventor: Jonas Persson
  • Patent number: 10119076
    Abstract: A gasifier including a vertically disposed furnace body, a feeder disposed in a middle part of the furnace body and communicating with the furnace body, one or two layers of microwave plasma generators, an external heater configured to supply external thermal energy for the gasifier, and a monitoring unit. The furnace body includes an upper nozzle for spraying vapor, a lower nozzle for spraying CO2/vapor, a syngas outlet disposed at a top of the furnace body. The upper nozzle for spraying vapor is disposed in a clearance zone of the furnace body, and the lower nozzle for spraying CO2/vapor is disposed in a bed zone of the furnace body. The monitoring unit is disposed close to the syngas outlet. The one or two layers of microwave plasma generators are disposed above the upper nozzle in the clearance zone of the gasifier.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: November 6, 2018
    Assignee: WUHAN KAIDI GENERAL RESEARCH INSTITUTE OF ENGINEERING & TECHNOLOGY CO., LTD.
    Inventors: Yilong Chen, Yanfeng Zhang, Minggui Xia, Liang Zhang
  • Patent number: 10113784
    Abstract: A direct-current power supply device includes a switching unit constituted by a first switching element and a second switching element and a control unit that controls the operations of the first witching element and the second switching element. The switching unit has a first mode in which on-duty is a first value and a second mode in which the on-duty is a second value larger than the first value. When transitioning the switching unit from the first mode to the second mode, the control unit controls the switching unit such that the time until the on-duty reaches the second value is equal to or longer than a fixed time and controls, after the on-duty reaches the second value, an operation cycle of the switching unit to extend the operation cycle.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: October 30, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yosuke Shinomoto, Kazunori Hatakeyama, Shota Kamiya
  • Patent number: 10114086
    Abstract: A hybrid imaging system includes a magnetic resonance scanner and a second modality imaging system disposed in the same radio frequency isolation space. The second modality imaging system includes radiation detectors configured to detect at least one of high energy particles and high energy photons. In some embodiments a retractable radio frequency screen is selectively extendible into a gap between the magnetic resonance scanner and the second modality imaging system. In some embodiments shim coils are disposed with the magnetic resonance scanner and are configured to compensate for distortion of the static magnetic field of the magnetic resonance scanner produced by proximity of the second modality imaging system.
    Type: Grant
    Filed: August 21, 2008
    Date of Patent: October 30, 2018
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Daniel Gagnon, Michael A. Morich, Douglas M. Blakeley, Robert L. Zahn, Kevin M. Nieman
  • Patent number: 10103635
    Abstract: A high power-factor buck-boost converter having a rectified low-frequency AC line voltage input and a DC output is provided. The converter may include a magnetic element, a controlled switch having a gate terminal and a drain terminal that is coupled to the magnetic element, a rectifier diode coupled to the magnetic element, an output smoothing capacitor coupled to the rectifier diode, and a control circuit having an output coupled to the gate terminal of the controlled switch for repeatedly turning the controlled switch off for a first time duration and on for a second time duration. The second time duration may be determined as a function of the first time duration immediately preceding the second time duration.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: October 16, 2018
    Assignee: Microchip Technology Inc.
    Inventors: Simon Krugly, Alexander Mednik, Marc Tan, Rohit Tirumala
  • Patent number: 10099787
    Abstract: The present disclosure is generally directed to a harmonics correction method and apparatus. In an embodiment, the method and apparatus are carried out in a light-emitting diode (“LED”) lighting unit that includes a set or string of LED lights. According to an embodiment, the LED lighting unit is a line-replaceable unit (“LRU”).
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: October 16, 2018
    Assignee: B/E Aerospace, Inc.
    Inventors: Brendan Upton, Eric Johannessen
  • Patent number: 10103560
    Abstract: A charger with a wide range output voltage includes a voltage output side, a first constant voltage output unit, a voltage modulation unit and a load voltage detection unit. The first constant voltage output unit generates a first constant voltage. The load voltage detection unit detects a load voltage and transmits the load voltage to the voltage modulation unit. According to the load voltage and a load charging voltage requirement, the voltage modulation unit generates a modulation voltage and transmits the modulation voltage to the first constant voltage output unit. The first constant voltage output unit transmits the first constant voltage and the modulation voltage to the voltage output side. Moreover, the modulation voltage is an n times of a second constant voltage. The n is a positive number.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: October 16, 2018
    Assignee: CHICONY POWER TECHNOLOGY CO., LTD.
    Inventors: Chien-Hung Chen, Chao-Ching Hsu, Chih-Feng Shen, Chung-Shu Lee
  • Patent number: 10075059
    Abstract: A current detection apparatus is provided which detects a current flowing through a detection part in an electrical circuit. The current detection apparatus includes a first coil connected in series with the detection part, a second coil magnetically coupled with the first coil, a full-wave rectifier circuit connected to both ends of the second coil, a switching element having a first end connected to a positive electrode side output part of the full-wave rectifier circuit and a second end connected to a first resistor, and a second resistor that forms a closed circuit with the second coil regardless of an open or closed state of the switching element.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: September 11, 2018
    Assignee: DENSO CORPORATION
    Inventors: Seiji Iyasu, Yuji Hayashi, Kimikazu Nakamura, Yuichi Handa
  • Patent number: 10076006
    Abstract: Drivers (1-7) comprise respective switching circuits (1, 2) for guiding respective current signals during respective time-intervals for the sequential driving of light emitting circuits (91, 92). The respective time-intervals are defined by the fact that amplitudes of a mains signal are in respective ranges during the respective time-intervals. More specifically, there is a bypass switching circuit (5) for guiding a bypass current signal which bypasses all light emitting circuit (91, 92) during an initial time-interval. An adaptation circuit (6, 7) adapts amplitudes of the respective current signals during the respective time-intervals, to reduce a total harmonic distortion. Said adapting may comprise an adaptation in response to information derived from the amplitude of the mains signal, and may comprise shaping the amplitudes of the current signals in response to information derived from the amplitude of the mains signal.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: September 11, 2018
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: Henricus Marius Joseph Maria Kahlman, Ralph Kurt
  • Patent number: 10033295
    Abstract: A rectifier circuit being arranged for rectifying electrical power, comprising a three phase power input, a magnetic splitter circuit being arranged for receiving the three phase power input and splitting the three phase power into a first three phase system and a second three phase system, the first three phase system having signals lagging signals of the second three phase system, a twelve pulse rectifier with six input terminal to connect the first and the second three phase system, and to generate a rectified electrical power at a power output, a three phase inductance being connected in series with the three phase power input and the magnetic splitter circuit, and a plurality of power factor correction (PFC) capacitors, each comprising first and second terminals, said first terminals being connected to respective input terminals of the twelve pulse rectifier, and the second terminals being connected to at least one common electrical point.
    Type: Grant
    Filed: July 10, 2014
    Date of Patent: July 24, 2018
    Assignee: ITW GSE APS
    Inventors: Søren Risgaard Dahl, Ronni Bøgebjerg Azulay
  • Patent number: 10027217
    Abstract: In the field of high voltage direct current power transmission networks, a method of controlling a converter that includes at least one converter limb which corresponds to a respective phase of the converter, is described. The method includes obtaining a respective AC current demand phase waveform for each converter limb which the corresponding converter limb is required to track, and a DC current demand which each converter limb is also required to track. The method further determining a limb portion current for each limb portion that the limb portion must contribute to track the corresponding required AC current demand phase waveform and the required DC current demand, and providing a limb portion voltage source for each limb portion to achieve the corresponding limb portion current. The method carrying out mathematical optimization to determine one or more optimal limb portion currents and/or provide optimal limb portion voltage sources.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: July 17, 2018
    Assignee: General Electric Technology GmbH
    Inventors: Sajjad Fekriasl, Michael Marc Claude Merlin, Timothy Charles Green, Kevin Dyke, Francisco Jose Moreno Muñoz, Omar Fadhel Jasim, Masoud Bazargan
  • Patent number: 10020742
    Abstract: A controller for use in a two-stage power supply is coupled to control switching of a switching element to regulate a transfer of energy from an input to an output of a flyback converter. The controller activates a boost switching element during a first interval in each line half cycle of an input voltage to boost an output voltage at an output of a boost-bypass converter. The controller deactivates the boost switching element during a second interval in each line half cycle such that the output voltage of the boost-bypass converter drops towards the input voltage during the second interval while the output voltage of the boost-bypass converter is greater than the input voltage. The controller controls the output voltage to follow the input voltage during a third interval of each line half cycle while the boost switching element remains deactivated and the input and output voltages are substantially equal.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: July 10, 2018
    Assignee: Power Integrations, Inc.
    Inventors: Antonius Jacobus Johannes Werner, Matthew David Waterson
  • Patent number: 10008351
    Abstract: A control system for a wireless power switch without a NEUTRAL wire comprises a wireless controlled power switch with both terminals connected between a LINE wire and a switch wire of a switch box without the NEUTRAL wire; a power acquiring device having two power input terminals respectively connected to the LINE wire and the switch wire of the switch box; and a wireless automation control device receiving an output voltage of the power acquiring device as the required power, the wireless automation control device controlling open or close of the wireless controlled power switch according to wireless control signal wirelessly. Specifically, a load device is connected between the switch wire and the NEUTRAL wire, and impedance between the two power input terminals of the power acquiring device is substantially larger than impedance of the load device.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: June 26, 2018
    Assignee: Climax Technology Co., Ltd.
    Inventors: Pin-Chia Lee, Lung-Shu Liu, Yu-Ling Chou
  • Patent number: 10003267
    Abstract: Isolated DC-DC converters and methods for operating the same are described herein. DC-DC converters include a driver that drives a primary winding of a transformer to transmit power to a secondary winding of the transformer across an isolation barrier. In some embodiments, a pair of symmetrical serial capacitors are provided between the driver and the primary winding of a resonant DC-DC converter with an on-chip transformer to slow down variations of a common mode voltage on the primary winding during operation. This in turn can suppress radiation emissions related to time variation rates of the common mode voltage and, and can also improve electromagnetic interference (EMI) performance of the DC-DC converter.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: June 19, 2018
    Assignee: Analog Devices Global
    Inventors: Tianting Zhao, Baoxing Chen, Yue Zhuo
  • Patent number: 10003278
    Abstract: A rectifying circuit includes, in part, first and second NMOS transistors, an impedance matching network, and an RF block circuit. The source and gate terminals of the first NMOS transistor respectively receive the ground potential and a biasing voltage. The second NMOS transistor has a gate terminal coupled to the drain terminal of the first NMOS transistor, a drain terminal coupled to the gate terminal of the first NMOS transistor, and a source terminal receiving the ground potential. The impedance matching network is disposed between the antenna and the drain terminals of the first and second NMOS transistors. The RF block circuit is coupled between the drain terminals of the first and second NMOS transistors and the output terminal of the rectifying circuit. The RF block circuit is adapted to prevent the RF signal from flowing into the output terminal of the rectifying circuit.
    Type: Grant
    Filed: November 24, 2014
    Date of Patent: June 19, 2018
    Assignee: CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Seyed Ali Hajimiri, Behrooz Abiri, Florian Bohn
  • Patent number: 9941812
    Abstract: A power conversion apparatus can receive an alternating current (AC) signal at an input and provide in dependence thereon a low voltage direct current (DC) signal from an output stage. The apparatus comprises a main path comprising a capacitor in series with the input. The apparatus comprises a first path to carry current carried by the main path in at least one of a positive going part and a negative going part of the AC signal and a second path to carry current carried by the main path in a positive going part and a negative going part of the AC signal. The apparatus further comprises switches operative to determine when one of the first and second paths carries current. The output stage receives current flowing in the first path and at least one of the switches operates based on a control signal derived from the DC signal.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: April 10, 2018
    Assignee: Analong Devices Global
    Inventors: Jonathan Ephraim David Hurwitz, Seyed Amir Ali Danesh, William Michael James Holland
  • Patent number: 9941780
    Abstract: A power converting apparatus includes a rectifier converting alternating-current power from an alternating-current power supply into direct-current power; a short-circuit unit short-circuiting the alternating-current power supply via a reactor; and a controlling unit controlling the short-circuit unit in a half cycle of the alternating-current power supply. A correction amount using inductance of the reactor is set in the controlling unit, and the controlling unit changes, using at least a detection value of a power supply current and the correction amount, an ON time and an OFF time of a plurality of switching pulses, and controls, using changed switching pulses, an ON/OFF operation of the short-circuit unit.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: April 10, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuji Takayama, Takashi Yamakawa, Koichi Arisawa, Shigeo Umehara, Tomomi Higashikawa, Makoto Tanikawa
  • Patent number: 9941807
    Abstract: A power conversion apparatus includes a rectifier to rectify a voltage of an input alternating current (AC) power source and a voltage drop device to output a dropped voltage using the voltage from the rectifier, and the voltage drop device includes a transformer and a communication voltage output device provided at a secondary side of the transformer to output a first direct current (DC) voltage for operation of a communication device. The communication voltage output device includes a first resistor provided at the secondary side of the transformer to reduce an output change rate of the first DC voltage and first and second zener diodes connected between the first resistor and ground to limit an upper limit of the first DC voltage. Accordingly, it is possible to stably supply a voltage to a communication unit while reducing standby power.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: April 10, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Jongwan Lee, Eungho Kim, Gwigeun Park
  • Patent number: 9929637
    Abstract: The device includes a rectifier circuit that converts alternating-current power from an alternating-current power supply into direct-current power; a short-circuit unit that short-circuits the alternating-current power supply via a reactor connected between the alternating-current power supply and the rectifier circuit; and a control unit that controls an ON/OFF operation of the short-circuit unit during a half cycle of the alternating-current power supply. The control unit includes a driving-signal generating unit that generates a driving signal Sa that is a switching pulse to control the ON/OFF operation of the short-circuit unit; and a pulse dividing unit that divides the driving signal Sa into a plurality of switching pulses.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: March 27, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koichi Arisawa, Takashi Yamakawa, Yuji Takayama, Shigeo Umehara, Tomomi Higashikawa, Makoto Tanikawa
  • Patent number: 9917518
    Abstract: A method and a circuit of detecting attachment and detachment between a portable device and a power converter are provided. The method and the circuit confirm attachment of the portable device to the power converter and generate an attachment signal. The method and the circuit further detect a bus voltage of the power converter for confirming detachment of the portable device from the power converter.
    Type: Grant
    Filed: April 22, 2015
    Date of Patent: March 13, 2018
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Eui-Soo Kim, Bong-Geun Chung, Gwan-Bon Koo, Ju-Hyun Kim, Young-Bae Park
  • Patent number: 9917501
    Abstract: A semiconductor device includes a plurality of transistors, each having a gate electrode including extending portions having a length obtained by dividing the gate electrode causing interruption to switching at a desired frequency, wherein current inflow terminals of the plurality of transistors are connected to each other and current outflow terminals of the plurality of transistors are connected to each other.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: March 13, 2018
    Assignee: Rohm Co., Ltd.
    Inventor: Keisuke Kadowaki
  • Patent number: 9899935
    Abstract: According to one embodiment of the present invention, when a power supply device including first and second amplification units which share an energy storage element is used, it is possible to reduce voltage stress on a semiconductor device and to consistently maintain voltages output to the first and second amplification units by independently adjusting the amplification rates of the first and second amplification units.
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: February 20, 2018
    Assignee: LG INNOTEK CO., LTD.
    Inventors: Jae Sam Lee, Dong Young Huh
  • Patent number: 9893603
    Abstract: There is provided a power converter which can suppress a surge voltage and reduce noise flowing from an input of a power changer. The power converter includes an inverter circuit 140, a capacitor 514 for smoothing DC power, a capacitor 515 for removing noise, and conductors 564p and 564n. The conductors 564p and 564n are connected to the capacitors 514 and 515 when power side terminals 562p and 562n are connected to an inverter circuit 140, and power source side terminals 561p and 561n are connected to a battery 136. In the conductors 564p and 564n, a parasitic inductance L1 between capacitor terminals 563p and 563n and capacitor terminals 560p and 560n is larger than a parasitic inductance L2 between capacitor terminals 563p and 563n and the power side terminals 562p and 562n.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: February 13, 2018
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Youhei Nishizawa, Kaname Sasaki, Yutaka Okubo, Yuki Fujita
  • Patent number: 9888534
    Abstract: A trigger circuit includes an off-time controller configured to receive a sensing voltage by sensing a driving current and to compare the sensing voltage to first and second certain voltages that are close to a zero voltage value and symmetrical to the zero voltage value to control a turn-off time of a driving switch in order for the sensing voltage to correspond to the zero voltage value at the turn-on time point of the driving switch and a switching controller configured to provide a switching control signal for turning on the driving switch at the turn-on time point of the driving switch.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: February 6, 2018
    Assignee: Magnachip Semiconductor, Ltd.
    Inventor: Seung Woo Hong
  • Patent number: 9866122
    Abstract: A boost-bypass converter includes a boost inductor coupled between an input and an output of the boost-bypass converter. A bypass diode is coupled between the input the output of the boost-bypass converter. A boost switching element is coupled to the boost inductor, and is coupled to be activated during a first interval in each line half cycle of an input voltage to boost an output voltage at the output of the boost-bypass converter. The boost switching element is coupled to be deactivated during a second interval in said each line half cycle such that the output voltage drops towards the input voltage. The output voltage is coupled to follow the input voltage during a third interval in said each line half cycle of the input voltage. Energy is transferred between the input and the output of the boost-bypass converter through the bypass diode during the third interval.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: January 9, 2018
    Assignee: Power Integrations, Inc.
    Inventors: Antonius Jacobus Johannes Werner, Matthew David Waterson
  • Patent number: 9847737
    Abstract: A voltage source converter for interconnecting first and second electrical networks, including first and second terminals for connection to the first electrical network, and a primary converter limb extending between the first and second terminals including first and second primary limb portions separated by a third terminal connectable to the second electrical network. The converter further including a second chain-link converter connected to the third terminal and a control unit configured to selectively operate one or more chain-link modules to generate a discontinuous pulse width modulation voltage waveform. The converter further including a controller configured to selectively operate each chain-link converter to control the configuration of a discontinuous pulse width modulation voltage waveform at the third terminal.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: December 19, 2017
    Assignee: GENERAL ELECTRIC TECHNOLOGY GMBH
    Inventors: Francisco Jose Moreno Muñoz, Omar Fadhel Jasim, Si Dang, Sajjad Fekriasl, Kevin Dyke
  • Patent number: 9812977
    Abstract: A method comprises determining an operating mode based upon an input voltage and an output voltage of a resonant converter, wherein the resonant converter comprises a switch network coupled to an input dc power source, a resonant tank coupled to the switch network and a transformer coupled between the resonant tank and a secondary rectifier, wherein the secondary rectifier is a full-bridge rectifier, configuring the switch network to operate at a buck converter mode in response to a first input voltage and configuring the secondary rectifier to operate at a boost converter mode in response to a second input voltage, wherein the first voltage is higher than the output voltage and the second voltage is lower than the output voltage.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: November 7, 2017
    Assignee: Futurewei Technologies, Inc.
    Inventors: Liming Ye, Heping Dai, Dianbo Fu, Daoshen Chen
  • Patent number: 9793820
    Abstract: A method and apparatus for forming a direct current power supply. An apparatus comprises a transformer and a rectifier. The transformer is figured to output a plurality of phase-shifted alternating currents in response to receiving a plurality of alternating currents. The plurality of alternating currents and the plurality of phase-shifted alternating currents form a plurality of input alternating currents that are offset relative to each other by one-twelfth of a cycle in phase. The rectifier is configured to form a direct current power supply having a common mode voltage reduced to zero within selected tolerances in response to receiving the plurality of input alternating currents.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: October 17, 2017
    Assignee: THE BOEING COMPANY
    Inventors: Jian Huang, Christopher Mark Severns, Alan Thomas Bernier
  • Patent number: 9775211
    Abstract: The present invention is directed to circuit and apparatus for controlling an output of a constant current driver. A control apparatus is coupled between a constant current driver and a load, such as a lighting module, in order to add functionality to the overall system. The control apparatus is powered by the constant current driver and may control the dimming of the constant current driver by controlling the 0-10V dim input into the driver. The control apparatus may comprise one or more switching elements between the constant current driver and the load. The control apparatus may interface with external devices or communication networks in order to receive control commands or information that may be used for control purposes. Overall, the control apparatus is implemented into the system to enable added-value features that the constant current driver would otherwise not be able to implement.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: September 26, 2017
    Assignee: ARKALUMEN INC.
    Inventor: Gerald Edward Briggs
  • Patent number: 9768708
    Abstract: An adaptive power distribution system is presented for extending the dynamic range of AC/RF rectifiers. The power distribution system distributes the AC/RF input power amongst several different rectifier cells adaptively based on input power level. Consequently, high rectification efficiency can be maintained over a very wide dynamic range.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: September 19, 2017
    Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGAN
    Inventors: Amir Mortazawi, Xiaoyu Wang
  • Patent number: 9755432
    Abstract: An alternate arm converter includes at least one converter limb that defines first and second limb portions. Each limb portion includes at least one director switch connected in series with a chain-link converter between one of two DC terminals and an AC terminal of the converter. The chain-link converters are operable to generate a voltage waveform at the AC terminal, and the director switches are operable to switch the respective chain-link converters in and out of circuit between the respective DC terminal and the AC terminal. The converter also includes a controller configured to selectively control the switching of each director switch to form a current circulation path including each limb portion and the DC network. The controller, during formation of the current circulation path, forces an alternating current to flow through the current circulation path to transfer energy between the chain-link converters of the limb portions.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: September 5, 2017
    Assignee: GENERAL ELECTRIC TECHNOLOGY GMBH
    Inventors: Colin Donald Murray Oates, David Reginald Trainer, Ralph Feldman, Michael Marc Claude Merlin, Timothy Charles Green
  • Patent number: 9692294
    Abstract: A control circuit in a power factor correction (PFC) circuit includes: a multiplier, used for multiplying a voltage sampling signal by a feedback signal, and outputting a first signal; and a waveform generating module, used for generating a second signal related to a filter capacitor connected in parallel to an input end and/or an output end of a rectifier bridge. A control signal for controlling a state of a main switch transistor is generated by using the first signal, the second signal, and a current sampling signal of the main switch transistor in the PFC circuit.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: June 27, 2017
    Assignee: INVENTRONICS (HANGZHOU), INC.
    Inventors: Delai Jiang, Liang'an Ge, Lian Wu
  • Patent number: 9685882
    Abstract: An apparatus and a method for wireless power reception include converting a received wireless power to a wireless power for charging using a synchronous rectifier and a direct current/direct current (DC/DC) converter having a structure providing a high efficiency and low heat generation even when a high charging current is supplied.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: June 20, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong Zo Kim, Sang Wook Kwon, Ki Young Kim, Nam Yun Kim, Bong Chul Kim, Yun Kwon Park, Jae Hyun Park, Keum Su Song, Chi Hyung Ahn, Young Ho Ryu, Byoung Hee Lee
  • Patent number: 9648716
    Abstract: A power system for a reactive gas generator can include a direct three phase inverter. A resonant tank can further be included to receive a square wave output of the direct three phase inverter and provide a sine wave output. The power system can include an inverter controller that turns on and off selected switches of the direct three phase inverter based on states of the three phases of a three phase AC power supply, where a switch is turned on with an adaptive ON time and a modulated OFF time depending on a desired output power.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: May 9, 2017
    Assignee: MKS Instruments, Inc.
    Inventors: Ken Tran, Feng Tian
  • Patent number: 9627991
    Abstract: This relates to a rectifier with indicator switch circuit that may be used in a power conversion system. The rectifier with indicator switch circuit may be configured to rectify an ac line voltage and output an indicator signal that is representative of a fault condition in the ac line voltage. The rectifier with indicator switch circuit may include a storage capacitor configured to be charged by the ac line voltage during a first half-cycle of the ac line voltage and a detection capacitor configured to be charged by the storage capacitor during a second half-cycle of the ac line voltage. A switch coupled to the detection capacitor may be configured to generate the indicator signal based on a voltage across the detection capacitor. The indicator signal may be provided to a controller to disable operation of the power conversion system in response to the detection of a fault condition.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: April 18, 2017
    Assignee: Power Integrations, Inc.
    Inventors: Ricardo L. J. Pregitzer, Arthur Brian Odell, Sameer Kelkar