Diode Patents (Class 363/126)
  • Patent number: 11368018
    Abstract: A hybrid cascaded APF topology and control method therefor for improving the ability of a system to compensate for higher harmonics, raise the quality of electric energy of output currents, and reduce costs. The topology includes: a three-phase cascaded H-bridge including bridge arms of three phases, each bridge arm including a plurality of H-bridge cells connected in series, and the bridge arms of the three phases connected to a power system needing active filtering via inductors; and a three-phase H-bridge circuit connected at star connection points of the three-phase cascaded H-bridge, the three-phase H-bridge circuit including branches of the three phases and two capacitors connected in parallel across the branches of the three phases, and the branch of each phase including two switching transistors connected in series, where switching transistors of the H-bridge cells use Si devices, and the switching transistors of the three-phase H-bridge circuit use SiC devices.
    Type: Grant
    Filed: December 28, 2019
    Date of Patent: June 21, 2022
    Assignee: SHANDONG UNIVERSITY
    Inventors: Chenghui Zhang, Xi Liu, Hua Geng, Xiangyang Xing
  • Patent number: 11368022
    Abstract: A device for controlling a load flow in an alternating-voltage network includes first and second modular series connections of double-pole switching modules interconnected in a parallel circuit to be inserted in series into a phase line of the alternating-voltage network. At least one switching module of each connection has an energy store and semiconductor switches to be switched on and off. The semiconductor switches can be controlled in such a way that a switching module voltage can be generated at terminals of the switching module. The switching module voltage corresponds to a positive or negative storage voltage or a zero voltage. A control apparatus for controlling the switching modules is configured to generate an equalizing current between the modular series connections. A method for controlling a load flow by using the device is also provided.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: June 21, 2022
    Assignee: Siemens Energy Global GmbH & Co. KG
    Inventors: Burkard Endres, Martin Pieschel
  • Patent number: 11322985
    Abstract: A wireless power transfer system can be achieved at a low cost, can be used as both a power transmission apparatus and a power reception apparatus, and can cope with a change in coupling coefficient of a resonant coil of the power transmission apparatus and a resonant coil of the power reception apparatus. The wireless power transfer system is a power transmission apparatus that is able to perform bidirectional wireless power transmission, and includes the following: a power supply; a switching circuit that includes a plurality of switching devices; a resonator that includes a coil and a capacitor; a drive control circuit that controls an ON/OFF operation of each switching device of the switching circuit; and a detector that detects a resonance current flowing through the switching circuit.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: May 3, 2022
    Assignee: Maxell, Ltd.
    Inventors: Yoshihiro Todaka, Atsushi Tanaka, Hiroshi Ido
  • Patent number: 11316421
    Abstract: An apparatus can include: a linear drive circuit configured to control a drive current flowing through an LED load; a control circuit configured to acquire a conduction angle signal of a silicon-controlled rectifier dimmer and control the linear drive circuit; and the control circuit being configured to control the drive current to be decreased to reduce a current ripple and to maintain the silicon-controlled rectifier dimmer in a turn-on state when the conduction angle signal is less than a predetermined value.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: April 26, 2022
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Huiqiang Chen, Jianxin Wang
  • Patent number: 11283273
    Abstract: An all-electric, battery powered industrial or commercial mobile power unit is provided that can include a number of features. The mobile power unit can include a DC electrical energy source configured to produce a voltage of approximately 300-450 VDC. The mobile power unit can be configured so as to produce a user programmable voltage output and/or a user selected voltage output of either 480 VAC 3-phase, 208 VAC 3-phase, or 240 VAC single-phase. The various output configurations are controlled by software with a system controller of the mobile power unit. Methods of use are also provided.
    Type: Grant
    Filed: June 1, 2021
    Date of Patent: March 22, 2022
    Assignee: MOXION POWER CO.
    Inventors: Alexander J. Smith, Paul M. Huelskamp, Alexander M. Meek, Jared T. Mickle
  • Patent number: 11271485
    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: December 28, 2020
    Date of Patent: March 8, 2022
    Assignee: Appulse Power Inc.
    Inventor: Aleksandar Radic
  • Patent number: 11261393
    Abstract: A method and system for cost-effectively converting a feedstock using thermal plasma, or other styles of gassifiers, into an energy transfer system using a blended syngas. The feedstock is any organic material or fossil fuel to generate a syngas. The syngas is blended with any fuel of a higher thermal content (BTU) level, such as natural gas. The blended syngas high thermal content fuel can be used in any energy transfer device such as a boiler for simple cycle Rankine systems, an internal combustion engine generator, or a combined cycle turbine generator system. The quality of the high thermal content fuel is monitored using a thermal content monitoring feedback system and a quenching arrangement.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: March 1, 2022
    Assignee: Plasma Tech Holdings, LLC
    Inventor: James C. Juranitch
  • Patent number: 11258370
    Abstract: In one aspect, a medium voltage power converter includes a plurality of slices each having: a transformer including a plurality of primary windings to couple to a utility source of input power and a plurality of secondary windings; and a plurality of power cubes coupled to the plurality of secondary windings, each of the plurality of power cubes comprising a low frequency front end stage, a DC link, and a high frequency silicon carbide (SiC) inverter stage to couple to a high frequency load or to a high speed machine.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: February 22, 2022
    Assignee: TECO-Westinghouse Motor Company
    Inventors: Enrique Ledezma, Paulo Guedes-Pinto, Randall Pipho, Bhaskara Palle, Ryan Edwards, Alex Skorcz
  • Patent number: 11251178
    Abstract: A power module includes a first MOS transistor and a first Schottky barrier diode for a lower arm, and a second MOS transistor and a second Schottky barrier diode for an upper arm. In one embodiment, one positive-side power supply terminal and one negative-side power supply terminal are provided, while an output terminal to which the first and second MOS transistors are connected and an output terminal to which the first and second Schottky barrier diodes are connected are provided as separate output terminals.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: February 15, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Seiya Sugimachi, Masataka Shiramizu
  • Patent number: 11233425
    Abstract: Embodiments of wireless power receivers are disclosed herein. For example, a wireless power receiver comprises an antenna configured to: receive radio frequency (RF) waves from a transmitter; and convert energy from the RF waves into alternating current. The wireless power receiver also includes a rectifier coupled to the at least one antenna that rectifies the alternating current into a direct current; and a charger, coupled to the rectifier, the charger configured to: receive the direct current; and control, via circuitry that is coupled with the charger, distribution of current using conduction paths: (i) to a load, and (ii) to and from at least one storage element coupled with the charger. In some embodiments, the circuitry is configured to select the one of the conduction paths based on: a respective power requirement of the load, a respective power requirement of the at least one storage element, and the direct current.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: January 25, 2022
    Assignee: Energous Corporation
    Inventor: Michael A. Leabman
  • Patent number: 11228252
    Abstract: An apparatus including direct-current (DC)-alternating-current (AC) inverter circuitry, first and second circuits, and output circuitry. The DC-AC inverter circuitry inverts a DC input signal corresponding to an input voltage to an AC signal. The first circuit and second circuits respectively include inductive isolation circuits driven in response to power from the at least one AC signal, and rectifier circuits that responds to the inductive isolation circuits by outputting first and second rectified signals, where at least one of the first and second rectifier circuits characterized as being limited by a voltage breakdown rating. The output circuitry provides a DC output voltage signal and to cascade a plurality of signals, including the first and second rectified signals, to provide a voltage source that is dependent on the first and second rectified signals and greater than voltage breakdown rating.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: January 18, 2022
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Juan M. Rivas-Davila, Lei Gu, Luke C. Raymond, Sanghyeon Park
  • Patent number: 11218028
    Abstract: The present disclosure relates to a wireless power receiving apparatus capable of receiving multi-level power transmitted by a wireless power transmitting apparatus. According to an embodiment of the present disclosure, the wireless power receiving apparatus includes a first receiving coil in which induced current is generated by electromagnetic induction, a second receiving coil connected in series with the first receiving coil by a switch, and a processor that is driven based on the induced current generated by the first receiving coil and controls the switch based on power information included in the induction current to selectively connect the first receiving coil and the second receiving coil.
    Type: Grant
    Filed: January 10, 2020
    Date of Patent: January 4, 2022
    Assignee: LG ELECTRONICS INC.
    Inventors: Hyengcheul Choi, Bongsik Kwak, Seong Hun Lee
  • Patent number: 11211826
    Abstract: A system for wireless power reception, preferably including one or more: antennas, dynamic impedance matches, RF-DC converters, DC impedance converters, and/or DC power outputs. A method for wireless power reception, preferably including: receiving power wirelessly at an antenna, dynamically adjusting an input impedance of a dynamic impedance match coupled to the antenna, and/or delivering the power to a load.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: December 28, 2021
    Assignee: Supply, Inc.
    Inventor: Christopher Joseph Davlantes
  • Patent number: 11205919
    Abstract: In this uninterruptible power supply system, a first converter (2) for generating a DC voltage and a second converter (5) for regenerating power are separately provided. DC buses (L1 to L3) are connected to the second converter (5) and to a bidirectional chopper (6) with bus bars (B1 to B3). The bus bars (B1 to B3) are formed into a laminated bus bar (24). First semiconductor modules (M1d, M2d) included in the second converter (5) and second semiconductor modules (M1a to M1c, M2a to M2c) included in the bidirectional chopper (6) are each mounted on the laminated bus bar (24) and connected to the bus bars (B1 to B3). The bus bars (B1 to B3) and the first and second semiconductor modules (M1a to M1d, M2a to M2d) are configured as an integrated converter unit (7).
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: December 21, 2021
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Keisuke Ohnishi, Shoichi Abe, Fumihiko Inoue
  • Patent number: 11146106
    Abstract: A radio-frequency energy harvesting circuit includes an antenna suitable for receiving the radio-frequency energy, a converter suitable for converting the radio-frequency energy received into a direct current electrical voltage, the “RF/DC converter”, an electrical energy storage capacity and an interface circuit arranged between an output port of the RF/DC converter and the electrical energy storage capacity. The interface circuit is a passive electrical circuit including a resistive load placed in series between the output port of the RF/DC converter and the electrical energy storage capacity, the resistive load being of static value equal to or greater than 400 kilo-ohms.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: October 12, 2021
    Assignee: UWINLOC
    Inventor: Jan Mennekens
  • Patent number: 11146169
    Abstract: This disclosure describes systems, methods, and apparatus for operating a power factor correction circuit. The power factor correction circuit can downconvert AC mains power to a lower power suitable for driving one or more LEDs. The power factor correction circuit can provide a regulated current, in a single-stage embodiment, and a regulated voltage, in a dual-stage embodiment. The power factor correction circuit can include an isolation transformer along with a switch for controlling downconversion. The power factor correction circuit can alternatively include a switch without isolation. Either way, the switch can have a duty cycle proportional to a desired downconversion from the AC mains signal, and can skip half cycles of the AC mains signal in order to reduce the downconverted output of the power factor correction circuit.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: October 12, 2021
    Assignee: LEDVANCE LLC
    Inventor: Anthony N. McDougle
  • Patent number: 11121664
    Abstract: A signal conversion device includes a first signal input terminal, a second signal input terminal, and a detector. A first AC signal is supplied to the first signal input terminal from a signal source. The second signal input terminal is supplied with an in-phase signal that is in phase with the first AC signal and an opposite-phase signal that is opposite in phase with the first AC signal. The second signal input terminal is supplied with a second AC signal whose phase has been switched by a switchover between the in-phase signal and the opposite-phase signal from the signal source. The detector detects, using the supplied first AC signal, whether the supplied second AC signal is the in-phase signal or the opposite-phase signal.
    Type: Grant
    Filed: March 13, 2020
    Date of Patent: September 14, 2021
    Assignee: NIDEC SERVO CORPORATION
    Inventor: Charles Simson Halason Silitonga
  • Patent number: 11099296
    Abstract: The invention relates to an RFID-type transponder for a contactless identification and wireless communication system, intended to affixed to a buried polymer pipe, comprising: an RFID chip; an electronic switching circuit coupled to the RFID chip; a first antenna coupled to the switching circuit, said first antenna having a surface covering a first portion of the external surface of the polymer pipe; and a second antenna coupled to the switching circuit, said second antenna having a surface covering a second portion of the external surface of the polymer pipe, said second portion being different from the first portion.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: August 24, 2021
    Inventor: Marc Palomares
  • Patent number: 11033434
    Abstract: Provided is a welding helmet maintaining a power-on state after initial power is applied thereto, the welding helmet including: a circuit unit controlling a shutter liquid crystal display (LCD) based on at least one of whether welding light exists and an intensity of the welding light; a power supply unit supplying power to the circuit unit; and a switch unit controlling electrical connection between the circuit unit and the power supply unit, wherein after being initially switched to an on state, the switch unit maintains the on state.
    Type: Grant
    Filed: August 28, 2019
    Date of Patent: June 15, 2021
    Assignee: OTOS WING.CO., LTD.
    Inventor: Moon Young Huh
  • Patent number: 11013081
    Abstract: A light dimming circuit has a continuous dimming function that includes a power supply and a light source module formed as a lamp. A power switch is connected to a power supply and receives a user input when the user turns on and turns off power. A light source drive circuit is connected to the power switch and the light source module. The light source drive circuit detects a switch on time and a switch off time, generates a light source drive signal according to the switch on time and the switch off time, and saves the light source drive signal and drives the light source module to illuminate. The light source drive signal controls a brightness of the light source module. The brightness of the light source module is adjusted to provide a continuous dimming function according to the switch on time and the switch off time.
    Type: Grant
    Filed: October 27, 2020
    Date of Patent: May 18, 2021
    Inventors: Haitao Yang, Shaofeng Huang, Lin Yang, Yangyang Luo
  • Patent number: 10992135
    Abstract: Techniques for distributing electrical power to a plurality of electrical loads can include coupling an existing group of electrical loads to a common power source through a load management system, measuring an aggregate group current drawn by at least the existing group of electrical loads and comparing the measured aggregate group current to an aggregate group current threshold value. When the measured aggregate group current exceeds the aggregate group current threshold value, increase a number of subgroups of the existing group, using subgroups that are formed without requiring information about individual current associated with the individual electrical loads, sequentially apply power to individual subgroups during non-overlapping time periods, sequentially measure at least a corresponding current drawn by the individual subgroups while power is applied to the subgroups, and sequentially comparing the measured current to a threshold value.
    Type: Grant
    Filed: July 11, 2019
    Date of Patent: April 27, 2021
    Assignee: Ergotron, Inc.
    Inventor: William Dale Tischer
  • Patent number: 10978960
    Abstract: In a power converter, modules are electrically interconnected by a busbar and joint members. Each joint member has a connecting portion formed on one side and a connecting portion formed on the other side, with respect to a bisector bisecting the width. The busbar has a connecting portion on one side with respect to a bisector bisecting the width. For a 200 V power supply specification, one end of each of two busbars is fixed to one joint member. For a 400 V power supply specification, one end of one busbar is fixed to one joint member.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: April 13, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kenji Iwazaki, Koichi Arisawa, Yosuke Shinomoto
  • Patent number: 10978963
    Abstract: A multi-phase shift transformer based AC-DC converter includes a single transformer that reflects a negative portion of an AC voltage to become a positive voltage by generating multiple phases from a poly-phase input. The multiple phases generated can be separated by as little as 1° to create a well-approximated DC output without the need for a smoothing circuit. The primary and second windings of the transformer are flat wire conductors structured to provide a larger number of windings per core including a larger number of secondary coils, which provides for a large number of output phases.
    Type: Grant
    Filed: November 21, 2019
    Date of Patent: April 13, 2021
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Kapila Warnakulasuriya
  • Patent number: 10958190
    Abstract: A voltage sourced converter for converting power from DC to AC features a chain of power electronic modules in between which each AC connection of the converter is made so as to form a series string or arm of the modules on at least one side of that connection to the chain which are controlled so as to produce at this connection an AC voltage waveform.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: March 23, 2021
    Assignee: TransGrid Solutions Inc.
    Inventor: Mojtaba Mohaddes Khorassani
  • Patent number: 10958102
    Abstract: Disclosed is an electromagnetic-inductive power supply apparatus, which switches so that a plurality of coils winding around a current transformer core is connected in series to a rectification unit based on the voltage induced in the current transformer, thereby producing the power within the set range even in a state where the voltage outside the reference is induced. The disclosed electromagnetic-inductive power supply apparatus senses the voltage induced in the current transformer and switches the plurality of unit coils is connected to the rectification unit based on the voltage sensed.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: March 23, 2021
    Assignee: AMOSENSE CO., LTD
    Inventors: Won-San Na, Jin-Pyo Park, Jung-Hyun Choi
  • Patent number: 10950382
    Abstract: An electric power system is provided that includes a three-phase to two twelve-phase transformer. The transformer includes first and second primary winding groupings, secondary winding groupings, and third, fourth, and fifth windings. The groupings can include sub windings. First primary winding groupings are coupled to form a wye configuration and coupled to second primary winding groupings and the windings. The first of the two twelve-phase outputs at the same voltage as the input voltage while the second twelve-phase output is at a lower voltage. Diode pairs are connected to each other, each diode pair having an inner connection connected to one of the outputs of the transformer and first and second ends respectively connected to a positive dc bus and a negative dc bus. The diode pairs operatively rectify the transformer output voltage to form a DC voltage with a reduced common mode voltage.
    Type: Grant
    Filed: January 10, 2020
    Date of Patent: March 16, 2021
    Assignee: The Boeing Company
    Inventor: Jian Huang
  • Patent number: 10938317
    Abstract: A double submodule for a modular multilevel converter comprising a first and second submodule coupled to the first. Each submodule comprises an asymmetric H bridge circuit with two parallel bridges branches, connected between a first and a second direct voltage node of the submodule. Each bridge branch is formed by a series connection from a controllable power semiconductor switch and a diode. A storage capacitor is connected in parallel to the asymmetric H bridge circuit between the first and the second direct voltage node of the submodule. The first and the second submodule are interconnected in such a way that a power semiconductor switch or a diode is part of a bridge branch of the first submodule as well as part of a bridge branch of the second submodule. A modular multilevel converter, comprises a series connection of such double submodules in each of its converter branches, is also disclosed.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: March 2, 2021
    Assignee: GE ENERGY POWER CONVERSION TECHNOLOGY LIMITED
    Inventors: Martin Geske, Joerg Janning
  • Patent number: 10938315
    Abstract: A control circuit for an AC/DC converter includes an AC detection circuit that periodically determines from a change in the AC input voltage whether AC voltage is being input and, upon determining that AC voltage is being input, outputs an AC detection signal that takes a HIGH level only for a prescribed duration; and an enable signal conversion circuit that filters the AC detection signal to generate the enable signal that is in a HIGH state when the AC detection signal is in the HIGH level and that becomes the LOW state after a prescribed time has passed since the AC detection signal becomes a LOW level unless the AC detection signal rises to the HIGH level again, thereby producing the enable signal that is more responsive.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: March 2, 2021
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Yuta Endo, Kazuhiro Kawamura
  • Patent number: 10917947
    Abstract: An induction heat cooking apparatus includes a rectifier configured to convert an AC voltage supplied from a power source into a DC voltage, a battery configured to store power, a switch configured to connect to at least one of the rectifier or the battery, an inverter connected to the switch and configured to receive a first voltage from at least one of the rectifier or the battery and convert the first voltage to a second voltage, and a heating coil configured to receive the second voltage from the inverter and generate magnetic fields in which the heating coil is configured to heat a cooking device based on the generated magnetic fields.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: February 9, 2021
    Assignee: LG Electronics Inc.
    Inventors: Seongho Son, Jaekyung Yang, Hyojin Choi, Yongsoo Lee
  • Patent number: 10904974
    Abstract: System and method for regulating one or more currents. The system includes a system controller, an inductor, a first resistor, a switch and a first diode. The system controller includes a first controller terminal and a ground terminal, the system controller being configured to output a drive signal at the first controller terminal. The inductor includes a first inductor terminal and a second inductor terminal, the first inductor terminal being coupled to the ground terminal, the second inductor terminal being coupled to one or more light emitting diodes. The first resistor includes a first resistor terminal and a second resistor terminal, the first resistor terminal being coupled to the ground terminal. The switch is configured to receive the drive signal and coupled to the second resistor terminal. The first diode includes a first diode terminal and a second diode terminal and coupled to the first resistor.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: January 26, 2021
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Jun Zhou, Yunchao Zhang, Lieyi Fang
  • Patent number: 10897207
    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: April 30, 2019
    Date of Patent: January 19, 2021
    Assignee: Appulse Power Inc.
    Inventor: Aleksandar Radic
  • Patent number: 10873271
    Abstract: A multiple output rectifier achieving effective supply of power to a plurality of loads. The multiple output rectifier converts an AC input signal into a first rectified output signal and a second rectified output signal, wherein the AC input signal has a fundamental period dividing into a first partial period where an AC current flows in a first direction and a second partial period where the AC current flows in a second direction being a reverse direction to the first direction. The multiple output rectifier includes a first input terminal and a second input terminal different from the first input terminal for input of the AC input signal. The multiple output rectifier further includes a common output terminal, a first output terminal, and a second output terminal. The common output terminal, the first output terminal, and the second output terminal are decoupled from each other for operation in a multiple output operative mode.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: December 22, 2020
    Assignee: Wiferion GmbH
    Inventors: Johannes Tritschler, Benriah Goeldi
  • Patent number: 10855192
    Abstract: A transformer-based switching power converter can include a slew rate limiter coupled to the switching stage and configured to limit rate of change of voltage across one or more switching devices of the switching stage, thereby reducing voltage spikes appearing on the secondary winding. The slew rate limiter may be configured to selectively operate to limit rate of change of voltage across one or more switching devices of the switching stage during startup of the switching stage, upon waking from burst mode, or at any time when zero voltage switching of the one or more switching devices is unavailable. The slew rate limiter can include at least one circuit element configured to selectively alter a time constant of a gate drive circuit of at least one switching device in the switching stage to increase a turn-on transition time of the at least one switching device.
    Type: Grant
    Filed: August 13, 2019
    Date of Patent: December 1, 2020
    Assignee: Apple Inc.
    Inventors: Zaohong Yang, Marco A. Davila, Jr., Joao L. Andres, Poornima Mazumdar, Bogdan T. Bucheru
  • Patent number: 10848005
    Abstract: A receiver is energized by wireless power from a coil antenna. A matching network tunes the receiver to a resonant frequency and a bridge and capacitor generate an output voltage. The output voltage is divided and compared to a reference voltage. An asynchronous digital controller increases a digital count when the compare result is true, but decreases the digital count when the compare result is false. A current-steering Digital-to-Analog Converter (DAC) shunts a current from the output that is a function of the digital count. The asynchronous digital controller, comparator, and DAC do not use a system clock, so the digital feedback to the shunt current operates when the target output voltage is reached, preventing over-voltage when waiting for the system clock to begin pulsing. The digital count is compared to a digital threshold to recover transmitted Amplitude-Shifted-Keyed (ASK) data.
    Type: Grant
    Filed: May 7, 2019
    Date of Patent: November 24, 2020
    Assignee: Hong Kong Applied Science and Technology Research Institute Company, Limited
    Inventors: Chi Hong Chan, Gordon Chung, Bun Go Yau
  • Patent number: 10819149
    Abstract: Disclosed is an energy mixer having a first active diode coupled between a first input node and an output node, and a second active diode coupled between a second input node and the output node. A first capacitor is coupled between the first input node and a dynamic node, and a second capacitor is coupled between the second input node and a third node. Switching circuitry is configured to selectively couple the dynamic node between a fixed voltage node and the second input node in response to a control signal provided by control circuitry. When an output voltage at the output node is within a first range, the dynamic node is coupled to the fixed voltage node and when the output voltage is within a lower voltage second range, the dynamic node is coupled to the second input node such that first capacitor and second capacitor are coupled in series.
    Type: Grant
    Filed: April 11, 2018
    Date of Patent: October 27, 2020
    Assignee: Khalifa University of Science and Technology
    Inventors: Mohammad Radwan Alhawari, Baker Mohammad, Hani Hasan Mustafa Saleh, Mohammed Ismail Elnaggar
  • Patent number: 10807488
    Abstract: A charging apparatus for an electric vehicle is disclosed. The charging apparatus includes an AC power input stage receiving at least one AC input power from among single-phase AC power and multi-phase AC power, a power factor corrector having full bridge circuits receiving AC input power, a link capacitor charged through the power factor corrector, a switch network having a first switch connecting any one of an AC power input line and a neutral line of the AC power input stage to the power factor corrector and at least one second switch connecting the AC power input stage to the power factor corrector or the link capacitor, and a controller controlling the power factor corrector and the switch network according to AC input power condition. The second switch includes switches selectively connecting at least one full bridge circuit to a positive(+) electrode of a battery.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: October 20, 2020
    Assignees: Hyundai Motor Company, KIA Motors Corporation
    Inventors: JongPil Kim, Sihun Yang, Woo Young Lee
  • Patent number: 10804812
    Abstract: An AC/DC power converter includes an input port configured to receive an AC power signal, a first transformer coupled to the input port, the first transformer comprising first and second primary windings and at least a first secondary winding, and a second transformer coupled to the input port, the second transformer comprising third and fourth primary windings and at least a second secondary winding. The first primary winding of the first transformer is coupled in series with the third primary winding of the second transformer, the second primary winding of the first transformer is coupled in series with the fourth primary winding of the second transformer, and the first secondary winding and the second secondary winding are coupled in parallel.
    Type: Grant
    Filed: April 9, 2019
    Date of Patent: October 13, 2020
    Assignee: Enersys Delaware Inc.
    Inventors: Patrick Dehem, Mohammed Kechmir, Qianqian Jiao, Yincan Mao, Rui Zhou
  • Patent number: 10798795
    Abstract: Disclosed is a driver that include a switching circuit for guiding current signal during time-intervals for the sequential driving of light emitting circuit. The time-intervals are defined by the fact that amplitudes of a mains signal are in ranges during the time-intervals. More specifically, there is a bypass switching circuit for guiding a bypass current signal which bypasses all light emitting circuit during an initial time-interval. An adaptation circuit 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: August 10, 2018
    Date of Patent: October 6, 2020
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: Henricus Marius Joseph Maria Kahlman, Ralph Kurt
  • Patent number: 10784678
    Abstract: An electromagnetic interference (EMI) suppression circuit is interposed between an AC source and a DC power conversion system. The EMI suppression circuit includes a pi-type filter network having first and second filter input terminals and having first and second filter output terminals. The pi-type filter network includes a common mode choke and a differential mode choke between the input terminals and the output terminals. The pi-type filter network includes a first X-type capacitor across the first and second filter input terminals and includes a second X-type capacitor across the first and second filter output terminals. A first Y-type emission reduction capacitor is connected between the first filter input terminal and earth ground. At least a second Y-type emission reduction capacitor and a damping resistor are connected in series to form a series resistor-capacitor combination between the first filter output terminal and earth ground.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: September 22, 2020
    Assignee: Universal Lighting Technologies, Inc.
    Inventors: Wei Xiong, Danny Pugh
  • Patent number: 10734886
    Abstract: The switching power supply device includes an AC voltage input unit, a filter, a first inductor, a switching unit, a first rectification unit that includes first and second rectifier elements, in which the first and second rectifier elements are connected in series, in which a second output terminal of the AV voltage input unit is electrically connected to a transmission line, which connects the first and second rectifier elements, via the filter, and that is connected in parallel to the switching unit, a first capacitor, an inverter, a second rectification unit that includes an input terminal which is connected to a secondary coil, a smoothing unit that is connected between the output terminals of the second rectification unit, a control unit, a second capacitor that is connected between a transmission line, which connects the first and second rectifier element, and the smoothing unit, and a twentieth capacitor.
    Type: Grant
    Filed: September 18, 2019
    Date of Patent: August 4, 2020
    Assignee: TDK CORPORATION
    Inventor: Ken Matsuura
  • Patent number: 10720854
    Abstract: A novel 72-pulse AC-DC converter based on a 36-pulse converter is designed and implemented in this invention. Combining the outputs of two parallel 18-pulse diode bridges, consisting of nine legs of diode rectifiers, results in a 36-pulse topology. A zero sequence blocking transformer (ZSBT) is designed and applied to the proposed scheme guarantying the independent operation of the two bridges. To achieve a 72-pulse output, a pulse doubling circuit is applied which is inherently a tapped inter-phase transformer. A polygon-connected autotransformer platform is designed and added to the converter, making the proposed scheme suitable for retrofit applications. The proposed solution is a tradeoff among the pulse number, the transformer platform, the complexity of the scheme and the cost. The proposed scheme has an optimized configuration in this regard. The simulation results show that the proposed scheme improves the power quality indices.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: July 21, 2020
    Inventor: Rohollah Abdollahi
  • Patent number: 10720829
    Abstract: A totem-pole bridgeless PFC conversion device includes a conversion unit, a control unit, a current detecting unit and a phase detecting unit. When the control unit determines that a peak value of an input current is within a predetermined interval between a positive current value and a negative current value based on a current signal of the current detecting unit and a phase signal of the phase detecting unit, the control unit controls the conversion unit to operate in a discontinuous conduction mode (DCM). When the control unit determines that the peak value of the input current is not within the predetermined interval, the control unit controls the conversion unit to operate in a critical conduction mode (CRM).
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: July 21, 2020
    Assignee: CHICONY POWER TECHNOLOGY CO., LTD.
    Inventors: Wen-Nan Huang, Ching-Guo Chen
  • Patent number: 10707780
    Abstract: A converter having a negative DC terminal and a positive DC terminal; at least three AC terminals, each AC terminal being arranged for an associated AC current to flow through the terminal, a converter bridge with at least three bridge legs, each bridge leg being associated with one of the at least three AC terminals and being able to connect the associated AC terminal to the negative DC terminal or the positive DC terminal; and a current measurement circuit having a current measurement element, the current measurement circuit being configured to guide either none or one or more of the AC currents flowing through one of the at least three AC terminals through the current measurement element.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: July 7, 2020
    Assignee: CELEROTON AG
    Inventor: Georg Oberholzer
  • Patent number: 10707699
    Abstract: A wireless power transfer circuit can include an interphase transformer operatively coupled to a receiver coil, a rectifier, and a load. The receiver coil can be configured to have an alternating current induced therein by a transmitter coil. The interphase transformer can be configured to deliver a current to the load that is twice the current induced in the receiver coil, and the rectifier can be configured to rectify the current delivered to the load. The interphase transformer may be constructed with a center tapped winding structure or a bifilar winding structure, and may be constructed as a planar transformer. The rectifier may be made up of diodes (which may be Schottky diodes) or may be a synchronous rectifier comprised of switching devices such as MOSFETs.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: July 7, 2020
    Assignee: Apple Inc.
    Inventors: InHwan Oh, Bharat Patel
  • Patent number: 10630178
    Abstract: A first controller controls the DC-DC converter to perform a step-up operation when a voltage on the DC bus is lower than a first reference voltage and controls the DC-DC converter to suspend the step-up operation when the voltage is equal to or higher than the first reference voltage. A second controller controls the inverter to maintain the voltage on the DC bus constant when the voltage on the DC bus is lower than a second reference voltage and controls the inverter to maximize an output power of the inverter when the voltage is equal to or higher than the second reference voltage.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: April 21, 2020
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Yusuke Iwamatsu, Naoaki Fujii
  • Patent number: 10581333
    Abstract: The disclosure relates to power electronics technology and aims to provide a control method of constant-voltage-gain isolation type bidirectional full-bridge DC/DC converter, which is based on a single-phase-shifting modulation method. By enabling the difference between the M times of the input voltage and primary-referred value of the output voltage to be constantly zero, to realize the control goal that the ratio value between the primary-referred value of the output voltage and the input voltage is constantly M; the ratio value between the primary-referred value of the output voltage and the input voltage is defined as the voltage gain M, wherein an adjusting range is 0.5˜2; through introducing a feedforward compensator involving the input and output voltages and the input and output currents, a linear controller of the system is implemented.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: March 3, 2020
    Assignee: Zhejiang University
    Inventors: Yonggang Peng, Xiaoming Wang, Wei Wei
  • Patent number: 10536999
    Abstract: An apparatus can include: a linear drive circuit configured to control a drive current flowing through an LED load; a control circuit configured to acquire a conduction angle signal of a silicon-controlled rectifier dimmer and control the linear drive circuit; and the control circuit being configured to control the drive current to be decreased to reduce a current ripple and to maintain the silicon-controlled rectifier dimmer in a turn-on state when the conduction angle signal is less than a predetermined value.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: January 14, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Huiqiang Chen, Jianxin Wang
  • Patent number: 10491103
    Abstract: A step-up converter includes a first inductance electrically connecting a first DC voltage input of the step-up converter to a first junction point, a step-up converter switch connecting the first junction point to a second DC voltage input and a second DC voltage output of the step-up converter, a first diode connecting the first junction point to a first DC voltage output of the step-up converter, and a snubber circuit comprising a charging path and a discharging path. The discharging path runs as a series connection of a capacitor and a second diode from the first junction point to the first DC voltage output, and the charging path is connected at its one end to a junction point between the capacitor and the second diode and is arranged such that the capacitor is charged when the step-up converter switch is switched on.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: November 26, 2019
    Assignee: SMA Solar Technology AG
    Inventors: Mario Willenberg, Raphael Knoke, Andreas Falk, Robert Stala, Marek Rylko, Jerzy Maslon, Andrzej Mondzik, Slawomir Szot, Adam Penczek, Mitosz Szarek
  • Patent number: 10468972
    Abstract: A converter cell includes first and second arms, each of which includes a semiconductor switching element and a diode, and a short circuit part connected in parallel to the second arm, and when a DC fault detection unit detects occurrence of a DC fault, a control circuit outputs, to the converter cell, a fault handling command for setting the short circuit part to a conductive state, setting the semiconductor switching element to a conductive state, and setting the semiconductor switching element to a non-conductive state, to thereby set both the semiconductor switching element and the diode to conductive states in the second arm.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: November 5, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Yuki Ishii
  • Patent number: 10462417
    Abstract: Methods and apparatus for reducing electromagnetic interference resultant from data transmission over a high-speed audio/visual interface. In one embodiment, an HDMI source device is disclosed. The HDMI source device includes a wireless interface and an HDMI interface coupled with an active filter circuit topology. The active filter circuit topology includes a pair of differential signal lanes; a passive filter circuit disposed within each of the pair of differential signal lanes; a plurality of active filter circuits, with at least a first active filter circuit disposed on one side of the passive filter circuit and at least a second active filter circuit disposed on the other side of the passive filter circuit; a plurality of diodes, with each of the plurality of active filter circuits coupled with a respective diode; and switching logic coupled with the plurality of diodes. Methods of operating the HDMI source device and HDMI systems are also disclosed.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: October 29, 2019
    Assignee: Apple Inc.
    Inventors: William Cornelius, In Jae Chung, Bryan Follis, Pierre Michael, Kofi Boateng, Jongbae Park, Joseph Karaszewski