For Resonant-type Converter Patents (Class 363/21.02)
  • Patent number: 11118872
    Abstract: A conducted electrical weapon (“CEW”) launches wire-tethered electrodes from multiple cartridges to provide a stimulus signal through a human or animal target to impede locomotion of the target. The CEW may detect the quality of the electrical coupling (e.g., connection) of pairs of electrodes with the target. In accordance with the quality of the connections, the CEW may provide pulses of a stimulus signal to the various connections between electrode pairs in accordance with a sequence. The sequence may provide pulses at a first maximum pulse rate to any one connection to increase the likelihood of inducing neuromuscular incapacitation (“NMI”) and to save energy. The sequence may provide pulses to all connections at a second maximum pulse rate to increase the likelihood of inducing NMI and to save energy.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: September 14, 2021
    Assignee: Axon Enterprise, Inc.
    Inventors: Eric Goodchild, Gerzain Mata, Magne Nerheim
  • Patent number: 11081967
    Abstract: The invention discloses a self-adaptive synchronous rectification control system and a self-adaptive synchronous rectification control method of an active clamp flyback converter. The control system comprises a sampling and signal processing circuit, a control circuit with a microcontroller as a core and a gate driver. According to the control method, a switching-on state, an early switching-off state, a late switching-off state and an exact switching-off state of a secondary synchronous rectifier of the active clamp flyback converter can be directly detected, and the synchronous rectifier and a switching-on time of the synchronous rectifier in next cycle can be controlled according to a detection result. After several cycles of self-adaptive control, the synchronous rectifier enters the exact switching-on state, thus avoiding oscillation of an output waveform of the active clamp flyback converter.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: August 3, 2021
    Assignee: SOUTHEAST UNIVERSITY
    Inventors: Qinsong Qian, Shengyou Xu, Qi Liu, Weifeng Sun, Shengli Lu, Longxing Shi
  • Patent number: 11070090
    Abstract: The present disclosure relates to a resonance-type contactless power supply, an integrated circuit and a constant voltage control method. The resonance-type contactless power supply includes an inverter, a transmitter-side resonant circuit, a receiver-side resonant circuit, a rectifier circuit, and an output capacitance. In this resonance-type contactless power supply, the inverter receives electric energy, which is transferred to the rectifier circuit in a first state and is not transferred to the rectifier circuit in a second state. By switching between the first state and the second state, the resonance-type contactless power supply is controlled to provide a relatively constant voltage, and can be electrically coupled directly to a constant-voltage-type load.
    Type: Grant
    Filed: November 7, 2019
    Date of Patent: July 20, 2021
    Assignee: SILERGY SEMICONDUCTOR TECHNOLOGY (HANGZHOU) LTD.
    Inventors: Wang Zhang, Feng Yu
  • Patent number: 11070135
    Abstract: A converter includes an input capacitor, a primary-side switch circuit, a transformer, an inductor, a secondary-side switch circuit, and an output capacitor. The primary-side switch circuit includes a first and a second bridge arm. Each of the first and the second bridge arm includes at least two switches. A soft-start period of an output voltage from the converter includes a voltage rising period of the output voltage. A turn-on time of one of the at least two switches of the first bridge arm is less than ½ of a switching period. A turn-on time of one of the at least two switches of the second bridge arm is zero of the switching period or near zero of the switching period. The inductor and parasitic capacitors of the at least two switches of the second bridge arm oscillate, and energy generated from an oscillation is transmitted to the second-side switch circuit.
    Type: Grant
    Filed: September 23, 2019
    Date of Patent: July 20, 2021
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Da Jin, Ya-Hong Xiong, Qing-Hua Su
  • Patent number: 11056930
    Abstract: A device operative to transfer power and communicate wirelessly includes a drive-sense circuit (DSC), memory that stores operational instructions, and processing module(s). The DSC generates a drive signal based on a reference signal and provides the drive signal to a first coil via a single line and via a resonating capacitor, and simultaneously senses the drive signal via the single line, to facilitate electromagnetic coupling to a second coil to transfer power wirelessly to another device. The DSC also detects electrical characteristic(s) of the drive signal including whether a communication signal is transmitted from another device and generates a digital signal representative thereof.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: July 6, 2021
    Assignee: SIGMASENSE, LLC.
    Inventors: John Christopher Price, Daniel Keith Van Ostrand, Phuong Huynh
  • Patent number: 11050354
    Abstract: A bi-directional LLC converter includes: first and second sides coupled by an isolation transformer, the first side including a switch network connected to an LLC network, the LLC network including a first winding of the isolation transformer, the second side including a switch network connected to a second winding of the isolation transformer; and a controller operable to operate the LLC converter in a forward mode in which the first side functions as an inverter and the second side functions as a rectifier, and to operate the LLC converter in a reverse mode in which the second side functions as an inverter and the first side functions as a rectifier. In the reverse mode, the controller is operable to delay turn off of the switch network on the first side at an operating frequency above resonance of the LLC converter, to yield a gain greater than one in the reverse mode.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: June 29, 2021
    Assignee: Infineon Technologies Austria AG
    Inventors: Manuel Escudero Rodriguez, Matteo-Alessandro Kutschak, David Meneses Herrera
  • Patent number: 11018589
    Abstract: Methods and systems for balancing output currents of parallel connected resonant converters are disclosed. One such method includes matching switching frequencies for a pair of resonant converters. The method also includes carrying AC output currents of resonant tanks of each of the resonant converters through a current controlled voltage source that is coupled to each of the resonant converters of the pair of resonant converters at an AC side of each of the resonant converters of the pair of resonant converters. The method further includes inducing, for the pair of resonant converters, a voltage that is proportional to a difference in the AC currents carried through the current controlled voltage source by passing the AC currents through the current controlled voltage source. The induced voltage is oriented to oppose the greater of the AC currents and to increase the smaller of the AC currents.
    Type: Grant
    Filed: February 5, 2020
    Date of Patent: May 25, 2021
    Assignee: SMPC TECHNOLOGIES LTD
    Inventors: Yu Ling Huang, Roumen Petkov
  • Patent number: 10938310
    Abstract: A DC-DC power converter has an auxiliary tank cascaded to share an efficiency tank's inductor, capacitor, and transformer. Switching transistors pump the auxiliary tank at startup to provide a boost current. The switching frequency is reduced in steps and the voltage gain and power of the converter sensed until the voltage gain matches a voltage gain calculated for the efficiency tank. Then tank switchover occurs and transistors to the efficiency tank are pumped with the last switching frequency used by the auxiliary tank, and the auxiliary tank is not pumped. Since the voltage gains before and after tank switchover are equal, no output voltage deviation or current spike occurs. A voltage sag or failure switches back to the auxiliary tank at a switching frequency determined by a dynamic contour line where the voltage gains of the two tanks are equal for the current power state.
    Type: Grant
    Filed: January 2, 2020
    Date of Patent: March 2, 2021
    Assignee: Hong Kong Applied Science and Technology Research Institute Company, Limited
    Inventors: Chi Man Cheng, Shek Mong Wong, Tak Lok Shum
  • Patent number: 10910952
    Abstract: Embodiments of this disclosure provide a control apparatus and method for a current resonance circuit and a current resonance power supply. The control method includes: performing integration on a resonance current of the current resonance circuit or a switching current of one or more switching elements to generate an integration signal; generating a feedback signal of the current resonance circuit; comparing the integration signal with the feedback signal, and generating a measurement signal according to a comparison result; performing digital filtering on the measurement signal; and according to the measurement signal after filtering, generating a pulse width modulation signal controlling the switching elements.
    Type: Grant
    Filed: November 18, 2019
    Date of Patent: February 2, 2021
    Inventors: Ryuichi Furukoshi, Osamu Ohtake
  • Patent number: 10869337
    Abstract: In one embodiment, a method in a user equipment (UE) for random access (RA) coverage enhancement (CE) is disclosed. The method includes transmitting a random access preamble to a UE, wherein a power of the random access preamble is determined, in part, by a current CE level. The method further includes incrementing a value of a counter by one, wherein the value of the counter indicates a number of random access preambles previously transmitted by the UE. The method may then compare the value of the counter after incrementing its value, to a transmission limit, wherein the transmission limit indicates a maximum number of random access preamble transmission attempts for the current CE level. In response to the counter being equal to the transmission limit plus one, the method includes resetting the value of the counter.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: December 15, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Andreas Höglund
  • Patent number: 10862387
    Abstract: A power converter controller includes a fractional valley controller configured to determine a target number of valleys of a resonant waveform at a drain node of a main switch, the target number of valleys corresponding to a desired off-time of the main switch, the fractional valley controller modulating an off-time of the main switch between two or more modulated off-times. The target number of valleys corresponds to a non-integer number of valleys of the resonant waveform at the drain node of the main switch. Each of the modulated off-times of the main switch corresponds to an integer number of valleys, and the two or more modulated off-times of the main switch has an average value that corresponds to the desired off-time.
    Type: Grant
    Filed: October 28, 2019
    Date of Patent: December 8, 2020
    Assignee: Appulse Power Inc.
    Inventor: Aleksandar Radic
  • Patent number: 10840812
    Abstract: A flyback converter (10) for operating one or more lighting means, wherein the flyback converter (10) has a transformer and the transformer is arranged between a primary side of the flyback converter (10) and a secondary side of the flyback converter (10), wherein the flyback converter (10) is configured, and wherein the flyback converter (10) has a current detection circuit (107) that is configured to detect the current flowing through the secondary side of the flyback converter (10). The current detection circuit (107) can have a current detection transformer (108, 109). The flyback converter (10) can be configured such that the current flowing through the secondary side of the flyback converter (10) flows in a negative direction at least some of the time.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: November 17, 2020
    Assignee: TRIDONIC GMBH & CO KG
    Inventors: Ludwig Erasmus De Clercq, Joan Ortega
  • Patent number: 10826402
    Abstract: Controlling switching frequency of LLC resonant power converters. At least one example embodiment is a method of operating LLC converter, including: measuring values indicative of current through a primary winding of a transformer of an LLC converter, the measuring during a first on-time of a first switching period of an electrically controlled switch coupled to the primary winding, and the measuring creates a current waveform; calculating a slope of the current waveform; and controlling frequency of switching the electrically controlled switch based on the slope.
    Type: Grant
    Filed: November 5, 2019
    Date of Patent: November 3, 2020
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Roman Stuler, Vaclav Drda, Roman Mazgut
  • Patent number: 10797604
    Abstract: An LLC converter includes a switch module, a transformer, an output circuit, a resonant circuit and a safety capacitor. The switch module is connected between an input voltage and a ground. The transformer has a primary side winding and at least one secondary side winding. The output circuit is connected between the at least one secondary side winding and a load. The resonant circuit is coupled between the primary side winding and the switch module and includes at least one leakage inductor. The safety capacitor is connected between the at least one leakage inductor and the switch module.
    Type: Grant
    Filed: August 19, 2019
    Date of Patent: October 6, 2020
    Assignee: ASIAN POWER DEVICES INC.
    Inventors: Tsung-Liang Hung, Yeu-Torng Yau
  • Patent number: 10778107
    Abstract: A series resonant converter includes a switching circuit, a resonant tank, a transformer and a rectifier circuit. The switch circuit has a power supply connected to the primary side upper bridge switch and the primary side lower bridge switch, which are configured to control the input voltage and the input current of the power supply. The resonant tank is coupled to the switch circuit and includes a resonant inductor, a resonant capacitor, and a magnetizing inductor connected in series. The transformer is coupled to the resonant tank and includes a core, a primary winding, and at least four groups of secondary windings. The core has a center column, the primary winding is wound on the center column, and at least four secondary windings are wound on the center column. The number of equivalent windings added by the at least four groups of secondary windings is 1.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: September 15, 2020
    Inventor: Huang-Jen Chiu
  • Patent number: 10770980
    Abstract: An electronic half-bridge converter includes an input comprising two terminals for receiving a first power signal, and an output comprising two terminals for providing a second power signal. The converter includes a transformer and a half-bridge, wherein the half-bridge is interposed between input and primary winding of transformer. On the secondary side of transformer, the converter includes a rectifier circuit configured for converting the current provided via secondary winding into a rectified current, and a filter circuit configured for providing said second power signal by means of a filtering of the rectified current provided by rectifier circuit. The filter circuit includes: a first branch connected between both input terminals of the filter circuit and comprising a first inductor and a first capacitor connected in series, and a second branch connected in parallel with the first branch and comprising a second inductor and the output connected in series.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: September 8, 2020
    Assignee: OSRAM GmbH
    Inventor: Daniele Luccato
  • Patent number: 10756624
    Abstract: A DC-DC converter suitable for conversion of high input voltages to regulated low output voltages at very high output currents has a cascade of stages including a buck regulation stage, an unregulated switched capacitor voltage doubler, and an unregulated voltage isolation stage. These three stages are merged in a single switching structure so that each stage optimally performs its respective function while also taking advantage of characteristics and features of neighboring stages.
    Type: Grant
    Filed: September 12, 2019
    Date of Patent: August 25, 2020
    Assignee: Bel Fuse (MACAO COMMERCIAL OFFSHORE) Limited
    Inventor: Giorgio Augusto Mauri
  • Patent number: 10741325
    Abstract: An inductive power transfer system (IPT) pick-up comprises: a pick-up coil capable of generating a voltage by magnetic induction from a primary conductive pathway, and a tuning capacitor associated with the pick-up coil to provide a first pick-up resonant circuit; a first output associated with a first control means to substantially control the voltage or current provided by the first output; a further resonant circuit connected in series or parallel with the first pick-up resonant circuit; and a second output associated with a second control means to control the voltage or current provided by the second output and a method of providing an additional independently controllable output from an IPT pick-up having a resonant pick-up circuit is also disclosed.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: August 11, 2020
    Assignee: AUCKLAND UNISERVICES LIMITED
    Inventors: John Talbot Boys, Grant Anthony Covic, Daniel James Robertson
  • Patent number: 10734889
    Abstract: Various improvements are provided to resonant DC/DC and AC/DC converter circuit. The improvements are of particular interest for LLC circuits. Some examples relate to self-oscillating circuit and others relate to converter circuits with frequency control, for example for power factor correction, driven by an oscillator.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: August 4, 2020
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: Reinhold Elferich, David Llewellyn John, William Peter Mechtildis Marie Jans, Johannes Hubertus Gerardus Op Het Veld
  • Patent number: 10715048
    Abstract: A control method used in a resonant converter with a switching circuit and a resonant circuit, wherein the switching circuit has a high side transistor coupled between an input voltage and a switch node and a low side transistor coupled between the switch node and a reference ground, the resonant circuit is coupled to the switch node and has a resonant capacitor and a resonant inductor. The method includes: generating an output feedback signal based on a signal of the resonant converter; sensing the voltage across the resonant capacitor generating a signal; comparing the output feedback signal with the voltage sensing signal to generate a high side off signal; determining when to turn off the high side transistor and turn on the low side transistor; detecting an on-time of the high side transistor; and determining when to turn off the low side transistor and turn on the high side transistor.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: July 14, 2020
    Assignee: Hangzhou MPS Semiconductor Technology Ltd.
    Inventor: Lei Miao
  • Patent number: 10693362
    Abstract: A switching power supply includes an insulated transformer, a full-bridge circuit which converts input DC power into AC power and outputs the AC power to a primary-side coil, an output circuit which converts AC power input from secondary-side coils into DC power and outputs the DC power, and a control circuit which controls the full-bridge circuit by using a phase shift method based on voltage output by the output circuit. When a measured value of the amount of phase shift determined from at least one of the voltage and current output by the output circuit is smaller than a theoretical value of the amount of phase shift corresponding to the switching power supply operating in a continuous current mode, the control circuit prolongs dead time used in the full-bridge circuit in accordance with the difference between the measured value and the theoretical value.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: June 23, 2020
    Assignee: FDK CORPORATION
    Inventors: Kenji Hamada, Tadashi Sato, Norio Fukui
  • Patent number: 10673325
    Abstract: A DC-DC converter can include: a switched capacitor converter; and a switching converter, where input ports of the switched capacitor converter and the switching converter are coupled to each other in one of series and parallel connections, and output ports of the switched capacitor converter and the switching converter are coupled to each other in the other of series and parallel connections.
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: June 2, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Wang Zhang, Chen Zhao
  • Patent number: 10651744
    Abstract: A semiconductor package includes a VLSI semiconductor die and one or more output circuits connected to supply power to the die mounted to a package substrate. The output circuit(s), which include a transformer and rectification circuitry, provide current multiplication at an essentially fixed conversion ratio, K, in the semiconductor package, receiving AC power at a relatively high voltage and delivering DC power at a relatively low voltage to the die. The output circuits may be connected in series or parallel as needed. A driver circuit may be provided outside the semiconductor package for receiving power from a source and driving the transformer in the output circuit(s), preferably with sinusoidal currents. The driver circuit may drive a plurality of output circuits. The semiconductor package may require far fewer interface connections for supplying power to the die.
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: May 12, 2020
    Assignee: VLT, Inc.
    Inventor: Patrizio Vinciarelli
  • Patent number: 10644607
    Abstract: An apparatus includes a pulse-width modulation (PWM) generator configured to generate a PWM signal for controlling a power switch of a power converter, a bias switch and a bias capacitor connected in series and coupled to a magnetic winding of the power converter and a comparator having a first input connected to the bias capacitor, a second input connected to a predetermined reference and an output configured to generate a signal for controlling the bias switch to allow a magnetizing current from the magnetic winding to charge the bias capacitor when a voltage across the bias capacitor is less than the predetermined reference.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: May 5, 2020
    Assignee: Futurewei Technologies, Inc.
    Inventors: Yushan Li, Liming Ye, Heping Dai
  • Patent number: 10644503
    Abstract: Described herein are power conversion systems and related techniques which utilize a coupled split path (CSP) circuit architecture. The CSP structure combines switches, capacitors and magnetic elements in such a way that power is processed in multiple coupled split paths in a variety of voltage domains. These techniques are well suited for power conversion applications that have one or more input/output ports that have a wide voltage range, or if the application is interfacing with the ac line voltage and requires power-factor correction.
    Type: Grant
    Filed: October 11, 2016
    Date of Patent: May 5, 2020
    Assignee: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: David J. Perreault, Khurram K. Afridi, Minjie Chen
  • Patent number: 10637369
    Abstract: According to one aspect, embodiments of the invention provide an inverter system including an input having a positive DC node and a negative DC node coupled to a DC power source to receive input DC power, an output coupled to a load to provide output AC power, a first inverter leg including a first and a second switching device, a second inverter leg including a third and a fourth switching device, the first inverter leg and the second inverter leg being adapted to convert the input DC power to the output AC power, a current sensor coupled to one of the negative and the positive DC node, and a controller assembly adapted to measure a current through the current sensor and determine an inductor current through an inductor coupled to the output, an input current, and an output current based at least on the current through the current sensor.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: April 28, 2020
    Assignee: SCHNEIDER ELECTRIC IT CORPORATION
    Inventors: Rajesh Ghosh, Mahendrakumar H. Lipare, Damir Klikic, Miao-Xin Wang, Mudiyula Srikanth
  • Patent number: 10574148
    Abstract: A method includes providing primary, secondary, and current injection windings. There is a controlled voltage source, an input voltage source, a primary switch connected to the primary winding, a parasitic capacitance reflected across the primary switch, a secondary rectifier means, and a current injection circuit including a current injection switch connected to the current injection winding, and a unidirectional current injection switch connected to the current injection winding. The method includes switching on the current injection switch to start current injection flowing from the controlled voltage source, through the unidirectional current injection switch and the current injection winding.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: February 25, 2020
    Assignee: Rompower Technology Holdings, LLC
    Inventor: Lonel Jitaru
  • Patent number: 10547244
    Abstract: The power supply apparatus having two switching elements connected to a primary winding of a transformer includes an adjustment unit for adjusting a voltage and supplying the voltage to a control unit. This voltage results from application of a voltage induced in an auxiliary winding while current is flowing in a predetermined direction with respect to the auxiliary winding as a result of the first switching element turned on and the second switching element turned off, and a voltage induced in the auxiliary winding while current is flowing in the direction opposite to the predetermined direction with respect to the auxiliary winding as a result of the first switching element turned off and the second switching element turned on.
    Type: Grant
    Filed: June 17, 2019
    Date of Patent: January 28, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takashi Odate, Keizo Kojima, Atsushi Ohno
  • Patent number: 10541619
    Abstract: An LLC resonant converter and an electronic device are provided. The LLC resonant converter according to the present disclosure includes a multi input transformer, first and second converter units connected to a primary side of the multi input transformer, an input voltage part, a first balance capacitor, and an output part connected to a secondary side of the multi input transformer.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: January 21, 2020
    Assignee: SOLUM CO., LTD.
    Inventors: Sang-keun Ji, Sang-kyoo Han, Hyun-su Gu, Hyo-hun Kim, Dong-kyun Ryu, Heung-gyoon Choi
  • Patent number: 10530263
    Abstract: An electronic converter comprising an input comprising two terminals for receiving a first power signal, and an output comprising two terminals for providing a second power signal. On the primary side, the converter comprises a half-bridge, a transformer and a first capacitor. Specifically, the first capacitor and the primary winding of the transformer are connected in series between the intermediate point of the half-bridge and an input terminal. On the secondary side, the converter comprises a diode, a second capacitor and an inductor. The second capacitor and the secondary winding of the transformer are connected in series between the cathode and anode of the diode, and the inductor and the output are connected in series between the cathode and the anode of the diode. The electronic converter comprises a third capacitor and at least one electronic switch adapted to selectively connect the third capacitor in parallel with the second capacitor.
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: January 7, 2020
    Assignee: OSRAM GMBH
    Inventors: Daniele Luccato, Enrico Raniero
  • Patent number: 10505462
    Abstract: A power converter includes: two DC input terminals that input a DC input voltage; two DC output terminals that output a DC output voltage; an isolation transformer with a primary winding and a secondary winding; a switch that is connected across the two DC input terminals in a state where the switch is connected in series to the primary winding and that switches the DC input voltage; an LC resonance circuit that includes an inductance and a capacitance and is connected in parallel to the primary winding; a first resonant capacitance that is connected in parallel to the switch; a second resonant capacitance that is connected in parallel to the secondary winding; and a rectifying and smoothing circuit that rectifies and smoothes a voltage generated across both ends of the second resonant capacitance and outputs as the DC output voltage across the two DC output terminals.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: December 10, 2019
    Assignee: TDK CORPORATION
    Inventors: Min Lin, Ken Matsuura
  • Patent number: 10505463
    Abstract: An LLC resonant converter and an electronic device are provided. The LLC resonant converter according to the present disclosure includes a multi input transformer, first and second converter units connected to a primary side of the multi input transformer, an input voltage part, a first balance capacitor, and an output part connected to a secondary side of the multi input transformer.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: December 10, 2019
    Assignee: SOLUM CO., LTD.
    Inventors: Sang-keun Ji, Sang-kyoo Han, Hyun-su Gu, Hyo-hun Kim, Dong-kyun Ryu, Heung-gyoon Choi
  • Patent number: 10483860
    Abstract: Various embodiments of devices, systems, and methods for regulating the output current of a switched mode, resonant power converter using primary side regulation. For at least one embodiment, a circuit for primary side regulation of a constant output current resonant transformer includes a transformer having a first coil with a first terminal and a second terminal. A controller circuit is configured to receive an input voltage and a resonant circuit is coupled to the controller circuit and the first terminal. A current sense circuit is coupled to the second terminal and to the controller circuit. The current sense circuit is configured to detect fluctuations in a sensed resulting voltage potential representative of the output current of the transformer. The current sense circuit is configured to provide a feedback signal to the controller circuit when the sensed resulting voltage potential is greater than a reference voltage.
    Type: Grant
    Filed: June 13, 2018
    Date of Patent: November 19, 2019
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Haibin Xiao, W K Chong
  • Patent number: 10483801
    Abstract: A power delivery system wirelessly delivers electric power and a communication signal to a target device. The power delivery system includes a power transmitting unit having a power source operable to source alternating current power and a sending resonant coupling component operable to couple the alternating current power to a coil for wireless power transmission by a non-radiated magnetic field at a target resonant frequency. The power transmitting unit is capable of dynamically tuning the wireless power transmission to the target resonant frequency wherein the target resonant frequency is specified dynamically. A communication module couples to the power transmitting unit and is operable to couple the communication signal to the non-radiated magnetic field. Operations may include target device authentication, target resonant frequency information communication, billing, and device management.
    Type: Grant
    Filed: December 29, 2015
    Date of Patent: November 19, 2019
    Assignee: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITE
    Inventor: James D. Bennett
  • Patent number: 10476433
    Abstract: A microwave generator includes a power supply, an output circuit, a feedback oscillator, a pulse controller, a signal combination circuit and a semiconductor amplifier. The power supply converts input voltage and input current into output voltage and output current. The output circuit generates a microwave signal to an output terminal of the microwave generator and a feedback signal according to the microwave signal. The feedback oscillator generates an oscillation signal according to the feedback signal. According to a reference signal, the pulse controller generates a pulse signal. According to the oscillation signal and pulse signal, the signal combination circuit generates a control signal. The semiconductor amplifier generates and adjusts an amplified signal according to the control signal. The output circuit generates the microwave signal according to the amplified signal. The output current is adjusted according to the amplified signal.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: November 12, 2019
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Yungtaek Jang, Yin-Yuan Chen, Sheng-Hua Li
  • Patent number: 10411613
    Abstract: An inductive power transfer (IPT) control method is disclosed for controlling the output of an IPT pick-up. The invention involves selectively shunting first and second diodes of a diode bridge to selectively rectify an AC current input for supply to a load, or recirculate the AC current to a resonant circuit coupled to the input of the controller. By controlling the proportion of each positive-negative cycle of the AC input which is rectified/recirculated, the output is regulated. Also disclosed is an IPT controller adapted to perform the method, an IPT pick-up incorporating the IPT controller, and an IPT system incorporating at least one such IPT pick-up.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: September 10, 2019
    Assignee: Aukland Uniservices Limited
    Inventors: John Talbot Boys, Grant Anthony Covic, Chang-Yu Huang
  • Patent number: 10411513
    Abstract: A wireless power transmitting apparatus wirelessly charging a wireless power receiving apparatus is provided. The wireless power transmitting apparatus includes a power providing unit configured to provide power, a gate driver configured to generate a differential signal formed of a first signal and a second signal from the power provided from the power providing unit, an amplifier configured to amplify the differential signal by a predetermined gain, a power transmitting unit configured to transmit the amplified differential signal to the wireless power receiving apparatus, and a differential signal correcting circuit that is disposed between the gate driver and the amplifier and is configured to correct the differential signal so that a predetermined phase difference between the first signal and the second signal is maintained.
    Type: Grant
    Filed: April 25, 2016
    Date of Patent: September 10, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-Ku Yeo, Do-Won Kim, Dong-Zo Kim, Bong-Chul Kim, Hyung-Koo Chung
  • Patent number: 10396773
    Abstract: A circuit and a corresponding method for driving one or more electric loads are described, comprising: a generator (110) of an electric current waveform, and a passive filter (150) connected in input to the generator (110) and in output to each electric load (105) to be driven, wherein the passive filter (150) is tuned for generating an electric current waveform resulting from a conditioning of one or more harmonics of the electric current waveform in input.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: August 27, 2019
    Assignee: EGGTRONIC ENGINEERING S.R.L.
    Inventor: Igor Spinella
  • Patent number: 10389164
    Abstract: Provided are a charging system, a protection method and a power adapter. The charging system comprises: a battery, a first rectification unit, a switch unit, a transformer, a second rectification unit), a voltage sampling circuit, a control unit, and a comparator unit. The first rectification unit outputs the voltage with the first pulsating waveform. The switch unit outputs the modulated voltage with the first pulsating waveform. The transformer outputs the voltage with the second pulsating waveform. The second rectification unit outputs the voltage with the third pulsating waveform. The control unit adjusts a duty cycle of a control signal, such that the voltage of a third pulsation waveform meets the charging requirement of the battery. The comparator unit applies a comparison signal to the switch unit when the voltage sampling value is greater than the reference voltage value, so as to control the switch unit to forcibly open.
    Type: Grant
    Filed: January 7, 2017
    Date of Patent: August 20, 2019
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: Chen Tian, Jialiang Zhang
  • Patent number: 10389108
    Abstract: An LLC resonant converter controller comprising an overcurrent protection circuit coupled to receive a current sense signal representative of current in a primary winding, wherein the overcurrent protection circuit outputs an overcurrent signal when the perturbed current sense signal is above a low threshold for a number of consecutive switching cycles. The LLC resonant converter controller further includes a control circuit coupled to generate a high side drive signal and a low side drive signal in response to a feedback signal representative of an output of an LLC resonant converter is further coupled to receive the overcurrent signal and is operable to disable switching of the first power switch and second power switch in response to the overcurrent signal.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: August 20, 2019
    Assignee: Power Integrations, Inc.
    Inventor: Rajko Duvnjak
  • Patent number: 10381934
    Abstract: A multiple parallel-connected resonant converter, an inductor-integrated magnetic element and a transformer-integrated magnetic element are provided. The multiple parallel-connected resonant converter includes a first and a second converters. The first converter having a first input and output end includes a first inductor, a first transformer and a first capacitor connected in series. The second converter having a second input and output end includes a second inductor, a second transformer and a second capacitor connected in series. The second output end is connected with the first output end in parallel. The first and second inductor are integrated in a first magnetic element, the first magnetic element includes a first and second side column, and a first and second central column. The first inductor includes a first coil positioned around the first central column and the second inductor includes a second coil positioned around the second central column.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: August 13, 2019
    Assignee: Delta Electronics (Shanghai) CO., LTD
    Inventors: Haijun Yang, Zengyi Lu, Weilong Xia, Yajiang Yan
  • Patent number: 10355601
    Abstract: According to some aspects of the present disclosure, switched-mode power converters and control methods are disclosed. Example power converters include an input terminal, an output terminal, and a transformer coupled between the input terminal and the output terminal. The transformer includes a primary winding and a secondary winding. The power supply also includes at least one switch coupled to the primary winding, and a primary controller coupled to the at least one switch to control switching operation of the at least one switch. The primary controller includes a voltage reference. The power supply further includes a secondary controller configured to detect a no load condition at the output terminal, and operate the primary controller in a burst mode by adjusting the voltage reference of the primary controller when the secondary controller detects the no load condition at the output terminal.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: July 16, 2019
    Assignee: Astec International Limited
    Inventors: Jun Liu, QingFeng Liu, Xun Gong, Zhe Li
  • Patent number: 10348212
    Abstract: A synchronous rectification controller includes a first gate pin coupled to a gate of a first synchronous rectification transistor, a first drain pin coupled to a drain of the first synchronous rectification transistor, a second gate pin coupled to a gate of a second synchronous rectification transistor, a second drain pin coupled to a drain of the second synchronous rectification transistor, a source pin coupled to a ground, a multiplexer selecting a voltage applied to the first drain pin in a first state, and selecting a voltage applied to the second drain pin in a second state, a pulse generator generating a pulse signal based on an output voltage of the multiplexer, a driving circuit switching the first synchronous rectification transistor according to the pulse signal in the first state, and switching the second synchronous rectification transistor according to the pulse signal in the second state.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: July 9, 2019
    Assignee: ROHM CO., LTD.
    Inventor: Hiroki Kikuchi
  • Patent number: 10340727
    Abstract: The present disclosure discloses a charging system, a charging method, and a power adapter. The charging system includes a battery, a first rectifier, a switch unit, a transformer, a second rectifier, a sampling unit, and a control unit. The control unit outputs a control signal to the switch unit, and adjusts a duty ratio of the control signal according to a current sampling value and/or voltage sampling value sampled by the sampling unit, such that a third voltage with a third ripple waveform outputted by the second rectifier meets a charging requirement of the battery.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: July 2, 2019
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: Jialiang Zhang, Jun Zhang, Chen Tian, Shebiao Chen, Jiada Li, Shiming Wan
  • Patent number: 10333406
    Abstract: An electric power converter includes a chopper circuit, a DC-DC converter coupled to an output of the chopper circuit, a first transformer including a first primary coil and a first secondary coil, a second transformer including a second primary coil and a second secondary coil, a first capacitor coupled between an output of the DC-DC converter and the first primary coil, a second capacitor coupled between the output of the DC-DC converter and the second primary coil, a first rectifier circuit coupled to the first secondary coil, and a second rectifier circuit coupled to the second secondary coil. A first output voltage of the first rectifier circuit is adjusted by adjusting an output voltage of the chopper circuit, and a second output voltage of the second rectifier circuit is adjusted by adjusting a powering time during one switching period of the DC-DC converter.
    Type: Grant
    Filed: August 24, 2018
    Date of Patent: June 25, 2019
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Yasunao Saga
  • Patent number: 10332474
    Abstract: A display apparatus is provided. The display apparatus includes a display configured to display an image, an image signal provider circuit configured to provide an image signal to the display, and a power supply configured to generate driving power and to supply the generated driving power to the image signal provider, wherein the power supply controls an operation time of a power factor compensation (PFC) circuit which performs power factor compensation of the display apparatus based on a size of an output load receiving the driving voltage.
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: June 25, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-yong Joo, Jin-hyung Lee, Moon-young Kim
  • Patent number: 10333414
    Abstract: The switching power supply device includes switching circuits, a transformer, an LLC resonance circuit, a microcomputer and a frequency regulator that sets switching frequencies of the switching circuits and a current detection circuit that detects the current Ir. The microcomputer and the frequency regulator sweep a switching frequency, and set a switching frequency on the basis of times to start the dead times of the switching elements, the current Ir detected by the current detection circuit, and the threshold current Imin.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: June 25, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Yuki Ishikura
  • Patent number: 10320299
    Abstract: The power supply apparatus includes a control unit configured to perform control of gradually changing a turn-on duty of a first switching element when a first voltage mode is switched to a second voltage mode or when the second voltage mode is switched to the first voltage mode.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: June 11, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yasuhiro Shimura, Hiroki Asano
  • Patent number: 10298138
    Abstract: In some implementations, a programmable power adapter includes a first set of switches, a resonant circuit, a transformer, and a second set of switches. The power adapter includes control circuitry configured to provide control signals that change the voltage conversion ratios of the first set of switches and the second set of switches. The control circuitry can provide control signals causing the first set of switches to operate in one of multiple operating modes that each correspond to a different voltage conversion ratio, and the control circuitry can provide control signals causing the second set of switches to operate in one of multiple operating modes that each correspond to a different voltage conversion ratio.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: May 21, 2019
    Assignee: Google LLC
    Inventors: Liang Jia, Honggang Sheng, Srikanth Lakshmikanthan
  • Patent number: 10291141
    Abstract: A converter circuit is disclosed. The converter circuit includes a transformer and a primary circuit connected to the primary side of the transformer, where the primary circuit includes a first switch connected to a ground. The converter circuit also includes a second switch connected to the first switch, and a clamping capacitor connected to the second switch and to the input. The converter circuit also includes a secondary circuit connected to the secondary side of the transformer, where the secondary circuit includes a rectifying element, and an output capacitor connected to the rectifying element. In addition, the output capacitor has a substantial effect on resonance of the converter circuit.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: May 14, 2019
    Assignee: Navitas Semiconductor, Inc.
    Inventors: Lingxiao Xue, Ju Zhang