In Chopper Converter Systems Patents (Class 363/124)
  • Patent number: 11811322
    Abstract: The present invention relates to a bi-directional power converter (100) for converting an input voltage into an output voltage. The bi-directional power converter (100) may comprise a primary switching unit having a primary switching frequency and a secondary switching unit having a secondary switching frequency: the primary switching frequency being lower than the secondary switching frequency.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: November 7, 2023
    Assignee: FORSEE POWER
    Inventor: Benoît Peron
  • Patent number: 11791731
    Abstract: Various embodiments provide a voltage regulator circuit including two or more discontinuous conduction mode (DCM) phases coupled to an output node and coupled in parallel with one another. A control circuit may detect a trigger and switch all of the two or more DCM phases to a first state (charge state) responsive to the detection. The control circuit may switch a first DCM phase, of the two or more DCM phases, to a second state (discharge state) after a first predetermined time period in the first state and may switch a second DCM phase, of the two or more DCM phases, to the second state after a second predetermined time period in the first state, wherein the second predetermined time period is different than the first predetermined time period. Other embodiments may be described and claimed.
    Type: Grant
    Filed: March 10, 2021
    Date of Patent: October 17, 2023
    Assignee: Intel Corporation
    Inventors: Juan Munoz Constantine, Alexander Lyakhov
  • Patent number: 11791650
    Abstract: A multi-port charging system includes a controller having a power input terminal coupled to a DC power output of a converter, multiple power output terminals coupled to the power input terminal, and a communications input terminal. The system includes multiple charger ports, the respective charger ports having a charging power line coupled to a respective one of the power output terminals, and a communications line coupled to the communications input terminal. The controller is configured to control the state of the control output terminal to set a voltage of the DC power output according to a selected highest common compatible voltage of one or more sink devices coupled to one or more respective ones of the charger ports.
    Type: Grant
    Filed: March 17, 2020
    Date of Patent: October 17, 2023
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: John Mitchell Perry, Indumini Ranmuthu
  • Patent number: 11784558
    Abstract: The invention relates to an LLC stage for an LED driver (100), comprising a half bridge or full-bridge circuit (100a) comprising two switches (M40, M41), connected in series, a control circuitry (100e), such as e.g. a microcontroller or ASIC, for controlling switching operations of the switches (M40, M41), wherein the control circuitry (100e) for switches is arranged to monitor the middle point voltage between the two switches (M40, M41) and enables the switch on of one of the switches (M40, M41) only if the middle point voltage meets defined criteria. The control circuitry (100e) is designed to issue an error signal, if a dead time, during which both switches are non-conducting and resulting from the monitoring of the midpoint voltage, is greater than a preset threshold value.
    Type: Grant
    Filed: April 1, 2020
    Date of Patent: October 10, 2023
    Assignee: Tridonic GmbH & Co KG
    Inventors: Harald Netzer, Stefan Stark
  • Patent number: 11780342
    Abstract: An on-board charging apparatus is provided to implement high-power charging. The on-board charging apparatus includes an alternating current (AC) to direct current (DC) conversion circuit (AC/DC conversion circuit), a power factor correction (PFC) circuit, and a DC/DC conversion circuit. An alternating current terminal of the AC/DC conversion circuit is connected to an alternating current terminal of the PFC circuit. The AC/DC conversion circuit is configured to: receive a first alternating current voltage at the alternating current terminal of the AC/DC conversion circuit, and convert a first component of the first alternating current voltage into a first direct current voltage. The PFC circuit is configured to: convert a second component of the first alternating current voltage into a second direct current voltage. The DC/DC conversion circuit is configured to: convert the first direct current voltage and the second direct current voltage into a third direct current voltage.
    Type: Grant
    Filed: March 29, 2022
    Date of Patent: October 10, 2023
    Assignee: Huawei Digital Power Technologies Co., Ltd.
    Inventors: Dianbo Fu, Weiping Liu, Shaohua Wang
  • Patent number: 11716025
    Abstract: The present disclosure aims to avoid a situation where a drive unit to be used for precharge does not drive due to a drop in power supply voltage. The power supply device is provided with the first voltage conversion unit and the control unit. The first voltage conversion unit performs a third voltage conversion operation in which a voltage applied to a second conductive path is boosted and an output voltage is output to a first conductive path to which a capacitive component is electrically connected. The control unit supplies the third control signal to only some of the plurality of first voltage conversion units, thereby causing the some of the first voltage conversion units to perform the third voltage conversion operation.
    Type: Grant
    Filed: May 14, 2019
    Date of Patent: August 1, 2023
    Assignees: AutoNetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
    Inventor: Kazuki Masuda
  • Patent number: 11682921
    Abstract: A power system includes first and second power supplies, and a control circuit. The control circuit is configured to control the first power supply to regulate its output voltage at a first value, enable the second power supply, increase the output voltage of the first power supply to a second value in response to the second power supply being enabled, increase an output voltage of the second power supply to a third value, and decrease an output current of the first power supply and increase an output current of the second power supply to transition between electrically powering the load with the first power supply and electrically powering the load with the second power supply. Other example power system and methods for controlling a power transition between power supplies are also disclosed.
    Type: Grant
    Filed: April 12, 2022
    Date of Patent: June 20, 2023
    Assignee: Astee International Limited
    Inventors: John Faustino Begino, III, Nathaniel Franco Neri, Jeremy C. David, Ricardo Bernado Roldan, Jr., Louie C. Cuevas
  • Patent number: 11618987
    Abstract: A drum washing machine, and a control method and a control apparatus for same are provided. The control method for the drum washing machine comprises the following steps: acquiring an average starting power of a drum in a starting process of the drum; acquiring a load range to which a current load of the drum belongs according to the average starting power; and setting a weighing protection velocity fluctuation threshold according to the load range to which the current load of the drum belongs. A value of the current load is obtained by using a correspondence between load with different weights and average starting powers. A weighing protection velocity fluctuation threshold is set according to the value of the current load to avoid the collision with the drum and non-dehydration in case of only one piece of clothing.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: April 4, 2023
    Assignee: GUANGDONG WELLING MOTOR MANUFACTURING CO., LTD.
    Inventors: Lei Xu, Liming Gong, Xiangnan Qin
  • Patent number: 11601066
    Abstract: A conversion apparatus with a three-level switching circuit includes a DC conversion module, a three-level circuit, and a control unit. The three-level circuit includes a bridge arm assembly and a capacitor assembly. The capacitor assembly includes a first capacitor and a second capacitor connected to the first capacitor in series. The DC conversion module has a positive output end and a negative output end, and the positive output end and the negative output end are coupled to the bridge arm assembly. The control unit controls the switching of a second switch unit and a third switch unit to make the three-level circuit operate in a first state where the positive output end and the negative output end are connected to the first capacitor, and operate in a second state where the positive output end and the negative output end are connected to the second capacitor.
    Type: Grant
    Filed: August 6, 2021
    Date of Patent: March 7, 2023
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Hung-Chieh Lin, Yi-Ping Hsieh, Jin-Zhong Huang, Hung-Yu Huang, Chih-Hsien Li
  • Patent number: 11594978
    Abstract: Aspects of the invention overcome a monolithic approach to conventional low-frequency LPTs by using a high-frequency solid-state alternating current ac/ac modular power-conversion approach. Embodiments of the invention enable the ability to incorporate new technologies without in all cases redoing a LPT design from scratch. Furthermore, given that LPTs are for the long term, aspects of the invention ensure that they are durable, efficient, and fault tolerant with overloading capability.
    Type: Grant
    Filed: December 25, 2020
    Date of Patent: February 28, 2023
    Assignee: NEXTWATT LLC
    Inventor: Sudip K. Mazumder
  • Patent number: 11575339
    Abstract: One aspect of the present disclosure is a power-supply apparatus to supply an electric power to an electric working machine including a trigger switch, a motor, and a tool. The power-supply apparatus includes a connection detector, a trigger detector, and a signal outputter. In response to (i) the connection detector detecting connection of the electric working machine to the power-supply apparatus, and also to (ii) the trigger detector detecting an ON state of the trigger switch, the signal outputter outputs, to the electric working machine, a discharge prohibition signal prohibiting supply of the electric power to the motor, until an OFF state of the trigger switch is detected once by the trigger detector.
    Type: Grant
    Filed: June 9, 2022
    Date of Patent: February 7, 2023
    Assignee: MAKITA CORPORATION
    Inventors: Junichi Katayama, Hitoshi Suzuki
  • Patent number: 11563374
    Abstract: A switching mode power supply preventing a first switch from being falsely triggered. The switching mode power supply detects a peak of an input signal and starts timing a period of time since the arrival of the peak of the input signal is detected. The first switch starts performing the on and off switching operations when the period of time expires.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: January 24, 2023
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: Yuedong Chen
  • Patent number: 11558042
    Abstract: A multi-phase signal control circuit includes: a comparator, configured to compare a triangular wave signal with a feedback control signal to output a first pulse width modulation signal, where the feedback control signal is a signal fed back by the power stage circuit; a phase switch circuit, configured to receive a phase switch signal and the first pulse width modulation signal to generate a first phase signal and a second phase signal, where the first phase signal and the second phase signal are used to control the power stage circuit to generate an output voltage signal.
    Type: Grant
    Filed: October 18, 2021
    Date of Patent: January 17, 2023
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Yue Chen, Jiake Wang, Liang Chen
  • Patent number: 11490468
    Abstract: Induction cooker having an induction coil, a supporting structure, a ferromagnetic element and a non-ferromagnetic element. The induction coil is arranged to receive a varying electric current and produce a corresponding varying electromagnetic field. The supporting structure is arranged to support a ferromagnetic object above the induction coil, the ferromagnetic object being placed in the corresponding varying electromagnetic field to be magnetically coupled to the induction coil, thereby determining a mutual inductance between the induction coil and the ferromagnetic object. The ferromagnetic element and the non-ferromagnetic element are arranged to be located between the supporting structure and the induction coil and selectively move in the corresponding varying electromagnetic field based on a mutual inductance between the induction coil and the ferromagnetic object.
    Type: Grant
    Filed: May 16, 2019
    Date of Patent: November 1, 2022
    Inventor: Irfan Karazor
  • Patent number: 11466637
    Abstract: An injection control device controls fuel injection to an internal-combustion engine by driving a fuel injection valve with an electric current to open and close the valve. The injection control device includes a boost circuit boosting a battery voltage; a boost controller controlling the boosting of the boost circuit; and a charge control setter setting charge permission or charge prohibition of the boost circuit to the boost controller. The charge control setter sets the charge permission or charge prohibition of the boost circuit to the boost controller according to a magnitude of an influence of a drive current error.
    Type: Grant
    Filed: September 15, 2021
    Date of Patent: October 11, 2022
    Assignee: DENSO CORPORATION
    Inventors: Kosuke Kato, Hiroyuki Fukuda, Yasumasa Ishikawa
  • Patent number: 11452189
    Abstract: A zero-crossing detection circuit coupled to a power factor correction (PFC) controller of a power supply system includes a zener diode configured to generate a zener reference signal, and an operational amplifier coupled to the zener diode and configured to receive the zener reference signal and a feedback signal corresponding to an output current of the power supply system, and to generate a zero-crossing signal to a zero-crossing input of the PFC controller.
    Type: Grant
    Filed: August 4, 2021
    Date of Patent: September 20, 2022
    Assignee: ERP POWER, LLC
    Inventors: Michael Archer, Louis Chen
  • Patent number: 11438993
    Abstract: According to one embodiment, the X-ray high voltage apparatus includes a plurality of converters and control circuitry. The plurality of converters converts AC power to DC power. Each converter includes choke coils and three-phase rectifier circuits. Each choke coil has a main winding and is provided on each phase line of three-phase AC power supply lines. Each three-phase rectifier circuit includes a switching device. The control circuitry is configured to interleave the plurality of converters. Each choke coil of the each converter has the single main winding and two correction windings of a first correction winding and a second correction winding. Each of currents flowing through the respective two correction windings is a sum of currents flowing through the plurality of converters performing interleaving operation, and flows so as to cancel a magnetic flux generated in the main winding.
    Type: Grant
    Filed: April 8, 2020
    Date of Patent: September 6, 2022
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventor: Fumio Ishiyama
  • Patent number: 11430642
    Abstract: A power converter is capable to convert an electrical input power into a bipolar output power and to deliver the bipolar output power to at least two independent plasma processing chambers. The power converter includes a power input port for connection to an electrical power delivering grid, at least two power output ports each for connection to one of the plasma processing chambers, and a controller configured to control the power converter to deliver the bipolar output power to the power output ports, using at least one of control parameters including power, voltage, current, excitation frequency, and threshold for protective measures. The controller includes a virtual power supply for each power output port, and each virtual power supply includes a separate complete set of all fixed and time varying parameters and internal states associated with the operation of the individual power output port.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: August 30, 2022
    Assignee: TRUMPF Huettinger Sp. Z o. o.
    Inventors: Jan Peter Engelstaedter, Krzysztof Ruda, Jakub Swiatnicki
  • Patent number: 11424683
    Abstract: Disclosed are a Darlington transistor drive circuit, a Darlington transistor drive method implemented based on such Darlington transistor drive circuit, and a constant current switching power supply including such Darlington transistor drive circuit. The Darlington transistor drive circuit includes a drive current circuit, two switch units, and a drive control circuit used for controlling the two switch units to be switched off during the switching-on cycle of the Darlington transistor and to be switched on during a switching-off cycle of the Darlington transistor, and for changing an equivalent resistance of the two switch units at different stages during the switching- off cycle of the Darlington transistor. The switching-off time delay of the Darlington transistor is greatly reduced while achieving the EMI optimization. In additional, the switch loss of Darlington transistor is small when it is switched off, and the efficiency is improved.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: August 23, 2022
    Assignee: FREMONT MICRO DEVICES CORPORATION
    Inventors: Kelvin Hui, Chong Huang, Yuquan Huang
  • Patent number: 11342850
    Abstract: The present disclosure provides a forward converter with secondary LCD connected in parallel to realize forward and backward energy transmission, comprising a forward converter main circuit and an energy transfer and transmission circuit. The forward converter main circuit includes a high-frequency transformer T, a switching tube S, a diode D1, a diode D2, an inductance L1, and a capacitor C1. The energy transfer and transmission circuit includes a diode D3, a capacitor C2 and an inductance L2.
    Type: Grant
    Filed: September 16, 2020
    Date of Patent: May 24, 2022
    Assignee: XI'AN MORDA CORE ELECTRONICS TECHNOLOGY CO., LTD
    Inventors: Shu Lin Liu, Bo Yang, Jun Yang
  • Patent number: 11342786
    Abstract: The present application includes an uninterruptable power supply device for connection of a 3-wire multiphase AC source to a 3-wire multiphase load, whereby the UPS device is provided for multiphase operation, including a converter part, which is connected to at least one power source and the load, and a 3-wire bypass, which interconnects the AC source to the load, whereby the bypass includes a bypass switch, which includes an independently controlled switching unit for each phase of the AC source, and the UPS device includes a control unit, which controls the converter part and the bypass switch, whereby the control unit controls the bypass switch to power one of the three phases of the load directly via the bypass by one phase of the AC source, and the control unit controls the converter part to power the remaining two phases of the load.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: May 24, 2022
    Assignee: ABB SCHWEIZ AG
    Inventor: Esa-Kai Paatero
  • Patent number: 11300632
    Abstract: An apparatus, such as an adjustable frequency drive (AFD), includes an inverter configured to be selectively coupled to a motor in a first mode and an AC line in a second mode and a control circuit configured to operate the inverter as a motor drive in the first mode and as a power compensator in the second mode. The power compensator may provide power factor correction. The control circuit may include a scalar controller configured to control the inverter according to a voltage vs. frequency characteristic determined by a field weakening point reference and the control circuit may vary the field weakening point reference in the second mode. The inverter may have an input coupled to a DC bus and the control circuit may be configured to adjust a frequency of the inverter in the second mode to increase a voltage on the DC bus.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: April 12, 2022
    Assignee: Eaton Intelligent Power Limited
    Inventors: John David Maurin, Jr., Stan Rex Simms, Thomas Arthur Farr
  • Patent number: 11289940
    Abstract: A multi-mode uninterruptible power supply (UPS) is provided. The multi-mode UPS includes a first path including a rectifier and an inverter, and a second path in parallel with the first path, wherein the multi-mode UPS is operable in an economy mode in which power flows from a utility to a load through the second path while at least one of the rectifier and the inverter is activated, the at least one of the rectifier and the inverter operable to perform at least one of DC voltage regulation, reactive power compensation, and active damping.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: March 29, 2022
    Assignee: ABB Schweiz AG
    Inventors: Lorenzo Giuntini, Ivan Furlan
  • Patent number: 11279244
    Abstract: A galvanically connected AC charger is provided having a monitoring and diagnostic system for the AC charging of an electric, fuel cell or hybrid vehicle.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: March 22, 2022
    Assignee: AUDI AG
    Inventors: Maximilian Schiedermeier, Tobias Graßl
  • Patent number: 11260762
    Abstract: This disclosure describes vehicle systems and methods for controlling charging of an auxiliary battery of an electrified vehicle. Exemplary charging methods align the charge management of an auxiliary battery to occur only during low cost charging windows.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: March 1, 2022
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Charles Everett Badger, II, Josephine S. Lee
  • Patent number: 11211878
    Abstract: A Direct Current (DC) chopper may be integrated into the Modular Multilevel Converter (MMC) cells of a power converter. The integrated DC chopper may include chopper resistors that may also be advantageously integrated into a heat sink for a power module including at least the power transistors of the MMC cell. The safe discharge of both cell capacitors and DC-link capacitors in different operating conditions is performed using Insulated-Gate Bipolar Transistors (IGBTs) and chopper resistors of an MMC cell.
    Type: Grant
    Filed: August 12, 2020
    Date of Patent: December 28, 2021
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventors: Ciprian Biris, Cem Özgür Gerçek, Lars Helle, Duy Duc Doan, Tune Pedersen
  • Patent number: 11196341
    Abstract: The switching power supply is provided with a voltage converter including a switching element for inputting a voltage from an input terminal, and has a spread spectrum function of varying a switching frequency in the switching element within a predetermined variation range. The switching power supply has a frequency setting unit that sets the variation range of the switching frequency and raises a lower limit value of the set variation range when a value of the voltage input from the input terminal is equal to or more than a predetermined threshold, and a signal generator that generates a control signal for driving the switching element by varying the switching frequency within the variation range set by the frequency setting unit.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: December 7, 2021
    Assignee: FDK CORPORATION
    Inventors: Kenji Hamada, Toshio Shibata
  • Patent number: 11189439
    Abstract: A power converting apparatus includes: a first arm including a switching element and a switching element connected in series; a second arm including a switching element and a switching element connected in series, the second arm being connected in parallel with the first arm; a reactor having one end connected to the switching element and the switching element and an opposite end connected to an alternating-current power supply; and a smoothing capacitor connected in parallel with the first arm and the second arm. The loss characteristic of the switching element and the second switching element that occurs in each switching event is better than the loss characteristic of the switching element and the switching element that occurs in each switching event.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: November 30, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takashi Yamakawa, Shigeo Umehara
  • Patent number: 11121630
    Abstract: An in-vehicle DC-DC converter includes a gain setting unit that sets a gain to be used for feedback computation, a duty ratio determination unit that determines a duty ratio, and a drive unit that outputs, to a switching element, a PWM signal that is based on the duty ratio to be used determined by the duty ratio determination unit. The duty ratio determination unit includes a computation unit that repeatedly performs feedback computation for calculating a duty ratio of a PWM signal, so as to approximate a voltage value of an output-side conductive path to a target voltage value, based on a voltage value detected by the voltage detection unit and the gain to be used set by the gain setting unit. The gain setting unit sets the gain to be used, based on a voltage value detected by the voltage detection unit.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: September 14, 2021
    Assignees: AutoNetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
    Inventor: Takeshi Hasegawa
  • Patent number: 11114942
    Abstract: A boost converter includes a first inductor, a power switch element, an output stage circuit, a controller, a resonant circuit, and a discharging circuit. The first inductor receives an input voltage. The power switch element includes a parasitic capacitor. The output stage circuit includes a first resistor. The output stage circuit generates an output voltage. The controller detects the resistive voltage of the first resistor, and generates a clock voltage, a first control voltage, and a second control voltage according to the resistive voltage. The resonant circuit is coupled to the first inductor, and is selectively enabled or disabled according to the first control voltage. When the resonant circuit is enabled, the resonant circuit resonates with the first inductor and the parasitic capacitor, so as to fine-tune an inductive current flowing through the first inductor.
    Type: Grant
    Filed: March 23, 2020
    Date of Patent: September 7, 2021
    Assignee: ACER INCORPORATED
    Inventor: Tzu-Tseng Chan
  • Patent number: 11108235
    Abstract: A power electronic converter can utilize exemplary double synchronous unified virtual oscillator control (DSUVOC) logic or circuitry to convert direct current to alternating current that is input into a power grid. An exemplary DSUVOC controller of the present disclosure includes a double synchronous space vector oscillator component, a sequence extraction component, a fault detection component, a pre-synchronization component, a virtual impedance component, a terminal voltage compensation component, and/or an active damping component, wherein the double synchronous unified virtual oscillator controller is capable of controlling a grid following or a grid forming power electronic converter enabling synchronization and fault ride-through under both balanced and unbalanced conditions.
    Type: Grant
    Filed: February 11, 2021
    Date of Patent: August 31, 2021
    Assignee: North Carolina State University
    Inventors: M A Awal, Iqbal Husain
  • Patent number: 11070081
    Abstract: A smart circuit breaker is configured for installation within a panel assembly. The smart circuit breaker includes a breaker device positioned between a power source and a subcircuit, the breaker device having a moveable contactor configured to change from an open state to a closed state, wherein in the closed state power flows from the power source to the subcircuit via a power line, and wherein in the open state power does not flow from the power source to the subcircuit. The smart circuit breaker further includes a power meter configured to measure a power characteristic of the subcircuit. The smart circuit breaker further includes a processing circuit configured to receive a power characteristic measurement from the power meter, the processing circuit having a communications interface configured to communicate power consumption data to an external device, the power consumption data based on the power characteristic.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: July 20, 2021
    Assignee: Johnson Controls Technology Company
    Inventors: Gerald A. Asp, Justin J. Ploegert, Paul K. Schemenauer, Robert A. Fox, Daniel A. Mellenthin
  • Patent number: 11063509
    Abstract: A step-up switching power supply circuit executes a step-up operation for stepping up an input voltage supplied through an input terminal. The step-up switching power supply circuit includes: an inductor; a switching element enlarging a current flowing through the inductor when the switching element is turned on; a step-up control circuit controlling the switching element to execute the step-up operation; a fault detection control circuit controlling the switching element to detect a fault of the switching element; a current detection unit detecting a current flowing through the switching element; and a switching unit executing switchover between the step-up control circuit and the fault detection control circuit to control the driving the switching element, Prior to execution of the step-up operation, the switching unit switches the fault detection control circuit to control the switching element.
    Type: Grant
    Filed: July 20, 2020
    Date of Patent: July 13, 2021
    Assignee: DENSO CORPORATION
    Inventor: Yutaka Yamanaka
  • Patent number: 11063512
    Abstract: A power conversion system includes a first and a second energy storage element, a first boost circuit, a switching element, a control circuit and a detection circuit. The first boost circuit is coupled between the first and the second energy storage element. The switching element is coupled to the first boost circuit in parallel. When the first voltage value is lower than a first preset level, the control circuit turns off the switching element and drives the first booster circuit to maintain a second voltage value according to the first voltage value, so that the power conversion system operates in a first state. When the first voltage value is equal to or larger than the first preset level, the control circuit turns on the switching element and turns off the first boost circuit, so that the power conversion system operates in a second state.
    Type: Grant
    Filed: May 5, 2020
    Date of Patent: July 13, 2021
    Assignee: Chicony Power Technology Co., Ltd.
    Inventors: Yung-Hung Hsiao, Chia-Hsien Yen, Da-Shian Chen, Hao-Chieh Chang, Cheng-Chang Hsiao
  • Patent number: 11050348
    Abstract: A semiconductor device includes an amplifier that has an output terminal and that outputs via the output terminal a signal commensurate with an input signal fed to the amplifier, a signal conductor that is connected to the output terminal and that conducts a target voltage signal based on the output signal of the amplifier, a shield conductor that is laid along the signal conductor, and a shield drive circuit that controls the voltage on the shield conductor based on the target voltage signal.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: June 29, 2021
    Assignee: Rohm Co., Ltd.
    Inventor: Shun Fukushima
  • Patent number: 11011937
    Abstract: A switching circuit is connected to an output side of a DC power supply, includes a low-side switch circuit and a high-side switch circuit, and generates high frequency power by switching of the low-side switch circuit and the high-side switch circuit. Snubber circuits are connected between both ends of the low-side switch circuit and both ends of the high-side switch circuit. The snubber circuits include series circuits including inductors and capacitors, and include diodes that are connected in parallel with the inductors.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: May 18, 2021
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Tatsuya Hosotani
  • Patent number: 10951112
    Abstract: An apparatus is provided for minimizing the peak power demand on an inverter in a power supply with one or more switched reactive loads comprising an AC semiconductor bypass switch connected in parallel with the inverter and a bypass control device. The bypass control device includes filters for selecting load current signals with specific frequencies of interest from the switched reactive loads; a signal processor for sampling and transforming the selected load current signals into frequency domain to identify frequency components of the selected load current signal; an amplitude detector for detecting peak current amplitudes of the identified frequency components of the selected load current signal; and a bypass driver.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: March 16, 2021
    Assignee: Edge Electrons Limited
    Inventors: Jian Carlo Decena Zapata, Neal George Stewart
  • Patent number: 10917006
    Abstract: A power converter can be configured to convert an AC input voltage into a regulated DC output voltage while maintaining the input current in phase with the rectified AC input voltage. A control circuit of the power converter may be configured to selectively enable switching of at least one switching device of the power converter responsive to a determination that the input voltage is greater than a threshold voltage and to selectively disable switching of the at least one switching device responsive to a determination that the rectified AC input voltage is less than the threshold voltage. The control circuit may be configured to selectively enable and disable switching using an active burst mode signal having a frequency lower than a switching frequency of the converter. The control circuit may be still further configured to operate at least one switching device of the converter in a zero voltage switching condition.
    Type: Grant
    Filed: November 1, 2019
    Date of Patent: February 9, 2021
    Assignee: Apple Inc.
    Inventors: InHwan Oh, Bharat K. Patel, Abby Cherian
  • Patent number: 10903741
    Abstract: A power converter circuit included in a computer system may include an adiabatic charge pump which includes multiple capacitors different numbers of which are used to charge and discharge a switch node coupled to regulated power supply node via an inductor. A control circuit may control the dividing ratio of the charge pump circuit as well as determine respective durations of when the charge pump circuit is charging and discharging the switch node.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: January 26, 2021
    Assignee: Apple Inc.
    Inventors: Michael Couleur, Nikola Javanovic, Siarhei Meliukh
  • Patent number: 10847991
    Abstract: A charging and discharging apparatus includes, in some implementations, an alternating current charging and discharging unit, a bidirectional alternating current/direct current conversion unit, a bidirectional direct current/direct current isolated conversion unit, and a first energy storage unit that are sequentially connected in series, and further including at least one switch unit, a direct current/direct current isolated conversion unit, and a second energy storage unit. A first end of each switch unit is connected to the bidirectional direct current/direct current isolated conversion unit, a second end of each switch unit is connected to a first end of the direct current/direct current isolated conversion unit, and a second end of the direct current/direct current isolated conversion unit is connected to the second energy storage unit.
    Type: Grant
    Filed: May 14, 2019
    Date of Patent: November 24, 2020
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Wentao He, Kui Zhou, Haoren Shan
  • Patent number: 10763761
    Abstract: A sub-module based hybrid converter is provided. By setting a half-controlled charging link of changing full bridge sub-modules from a blocked state to a half-blocked state one by one in a charging process, and raising the voltages of half bridge sub-modules to reach the starting point of a half bridge sub-module based self-powered supply in an uncontrolled stage of the half bridge sub-modules, the starting point of the sub-module based self-powered supply is increased, and the design difficulty of the sub-module based self- powered supply is reduced. The present invention also includes another charging method for a sub-module based hybrid converter.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: September 1, 2020
    Assignees: NR ELECTRIC CO., LTD., NR ENGINEERING CO., LTD
    Inventors: Jiudong Ding, Yu Lu, Yunlong Dong, Haiying Li, Jie Tian, Defeng Qiu, Tiangui Jiang, Jianyang Lian
  • Patent number: 10742136
    Abstract: In a method of compensating for a DC offset of a high-voltage AC output from a Modular Multilevel Converter (MMC) including at least one phase leg, the MMC is connected to a three-phase high-voltage AC grid via a grid transformer. The method includes, in at least one DC offset correcting device, measuring the DC offset by in each of the at least one DC offset correcting device: obtaining a high-voltage AC signal in the MMC, removing high-voltage AC components from the obtained high-voltage AC signal by means of a passive higher-order filter to obtained an analogue filtered signal, converting the analogue filtered signal to a digital signal by means of an analogue-to-digital converter, removing remaining AC components from the digital signal by means of a digital filter to obtain the DC offset, and in a controller comparing the obtained offset with a reference value and forming a control signal based on said comparing.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: August 11, 2020
    Assignee: ABB SCHWEIZ AG
    Inventors: Ilknur Colak, Xinhua Ke
  • Patent number: 10705128
    Abstract: A battery monitor control system has a load plate, two or more lead wires connected to two or more busbars in a string of batteries, and a digital signal processor. The load plate has one or more primary switches connected to two or more terminals of the batteries in the string of batteries. The load plate also has a load resistor and a current sensor. The primary switches are turned on and off to produce a ripple current in the string of batteries. The digital signal processor determines the real portion of the complex impedance of at least one of the batteries by analyzing the voltage and current waveform of the ripple current. The primary switches may be turned on and off with a sine wave modulation.
    Type: Grant
    Filed: May 2, 2019
    Date of Patent: July 7, 2020
    Assignee: BTECH Inc.
    Inventors: Edward M. Potempa, Allan J. Baum, Jr.
  • Patent number: 10688880
    Abstract: A battery charger of a vehicle which has a simple structure and a small size, and more particularly, a battery charger of an electric vehicle charging a battery using power supplied by a variety of power sources is provided. The battery charger of an electric vehicle includes a switch network which includes a first switch configured to connect any one of an AC power input line and a neutral line, which form an AC power input terminal, to a power factor corrector, one or more second switches configured to selectively connect the AC power input terminal to the power factor corrector, a link capacitor, or an inverter, and a third switch configured to electrically connect a motor to a high voltage battery, and a controller configured to control the power factor corrector and the switch network according to conditions of input AC power input through the AC power input terminal.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: June 23, 2020
    Assignees: Hyundai Motor Company, KIA Motors Corporation
    Inventors: JongPil Kim, Sihun Yang, Woo Young Lee
  • Patent number: 10651739
    Abstract: A power converter converts a medium-voltage output from a solar module to an appropriate voltage to power a solar tracker system. The power converter includes a voltage divider having at least two legs, a first semiconductor switch subassembly coupled in parallel with a first leg of the voltage divider, and a second semiconductor switch subassembly coupled in parallel with a second leg of the voltage divider. In implementations, the signals for driving the semiconductor switches of the first and second semiconductor switch subassemblies may be shifted out of phase from each other. In implementations, if the bus voltages to the semiconductor switches are not balanced, the pulse width of the driving signal of the semiconductor switch supplied with the higher bus voltage is decreased for at least one cycle.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: May 12, 2020
    Assignee: NEXTRACKER INC.
    Inventors: Chen Li, Yang Liu, Mohammad Salmaan Khan, Jonathan Kenzo Kamei, Sandeep Sanjiva Lele
  • Patent number: 10635122
    Abstract: A power supply system comprises a primary regulation system, a secondary regulation system, and a controller. The primary regulation system comprises a primary transformer and a primary tap switch array. The secondary regulation system comprising a secondary transformer and an adjustment power signal generator. The controller is configured to control the adjustment power signal generator to apply an adjustment power signal to the secondary transformer. The secondary transformer is configured to combine the adjustment power signal with a base power supply signal from the primary transformer.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: April 28, 2020
    Assignee: ALPHA TECHNOLOGIES SERVICES, INC.
    Inventor: Thanh Le
  • Patent number: 10622882
    Abstract: The present disclosure relates to frequency control of power conversion modules for decreasing THD (Total Harmonic Distortion) in a power conversion device in which a plurality of power conversion modules operate in parallel. In one aspect of the present disclosure, an embodiment provides a power conversion device comprising a plurality of power conversion modules being connected in parallel to receive input power and provide output AC power, and a frequency controller controlling each operating frequency of the plurality of power conversion modules, wherein, the frequency controller may include a function as a first frequency regulating step for regulating each operating frequency of the plurality of power conversion modules, so that the operating frequencies of the plurality of power conversion modules have a specific relationship with each other.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: April 14, 2020
    Assignee: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Seaseung Oh, Suyong Chae, Yujin Song, Jongbok Baek
  • Patent number: 10594220
    Abstract: A chopper section of a power supply device includes a plurality of step-down chopper circuits, and multiphase control of the step-down chopper circuits is performed using gate signals having phases displaced from each other. This shortens the period with which output signals of the step-down chopper circuits are changed. Shortening the period reduces the amount of jitter resulting from a gap between the occurrence of a command signal and a sampling point that is a point in time at which a gate signal is generated. The number of phases of the gate signals equals the number of phases of the step-down chopper circuits. The control of the gate signal generator is asynchronous to feedback control by the controller. Points in time (sampling points) at which gate signals are generated are points in time of generation (sampling points) after a point in time at which the controller calculates a manipulated value.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: March 17, 2020
    Assignee: KYOSAN ELECTRIC MFG. CO., LTD.
    Inventors: Itsuo Yuzurihara, Takeshi Fujiwara, Ryosuke Ohma, Hiroshi Kunitama, Satoshi Kawai, Ryota Suzuki
  • Patent number: 10566834
    Abstract: According to one aspect, an uninterruptable power supply (UPS) is provided. The UPS includes a first input constructed to receive input power from a first power source, a second input constructed to receive input power from a second power source, an output constructed to provide output alternating current (AC) power derived from at least one of the first power source and the second power source, a bypass switch having an on state and an off state coupled between the first input and the output, an inverter coupled between the second input and the output and constructed to generate the output AC power. The UPS being constructed to quickly transition from a first power delivery mode that provides output power derived from the first power source to a second power delivery mode that provides output power derived from the second power source.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: February 18, 2020
    Assignee: SCHNEIDER ELECTRIC IT CORPORATION
    Inventors: Qinghong Yu, Kaushal J. Patel, Adam Daniel Sanner
  • Patent number: 10518660
    Abstract: A power converter includes a chassis having attached thereto a holding fixture for mounting the chassis to a mounting portion in a suspended manner. The holding fixture includes a first member attached to a first surface of the chassis which faces the mounting portion, and a second member attached to the first member and a second surface of the chassis that adjoins the first surface.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: December 31, 2019
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Kiyoshi Takahashi