Patents Examined by Adolf D. Berhane
  • Patent number: 11146168
    Abstract: Provided is a snubber circuit comprising N parallel charging paths each having a positive-side capacitor, a first diode, and a negative-side capacitor sequentially connected in series between a positive-side terminal and a negative-side terminal, and configured to conduct current from the positive-side terminal toward the negative-side terminal; (N+1) parallel discharging paths each having a second diode connected between the negative-side terminal or the negative-side capacitor of kth charging path of N charging paths and the positive-side capacitor of (k+1)th charging path of N charging paths or the positive-side terminal, and configured to counduct current from the negative-side terminal toward the positive-side terminal via at least one of the negative-side capacitor and the positive-side capacitor; and at least one auxiliary capacitor each being connected in parallel to at least one of the N first diodes included on N charging paths and (N+1) second diodes included on (N+1) discharging paths.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: October 12, 2021
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Ryuji Yamada
  • Patent number: 11146250
    Abstract: The present application discloses a pulse voltage generation device, method and controller, the device comprises: a transformer; a first AC/DC conversion circuit, with an alternating current side connected with a high-voltage side of the transformer; an energy storage capacitor, connected with a direct current side of the a first AC/DC conversion circuit, for storing electrical energy; and a discharge control circuit, in parallel connection with both ends of the energy storage capacitor, for controlling discharge of the energy storage capacitor to generate a high-voltage pulse.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: October 12, 2021
    Assignee: Suzhou Powersite Electric Co., Ltd.
    Inventors: Shengfang Fan, Qiang Huang, Fei Chen, Xiaosen Chen, Jie He
  • Patent number: 11145470
    Abstract: The present invention relates to a method for controlling a motor-driven vacuum circuit breaker. The method comprises initiate opening (S100) the circuit breaker, wherein the circuit breaker moves with an average opening speed of a contact pair of the circuit breaker, from a closed position to an open position of the circuit breaker, and decelerating (S110) the opening speed of the contact pair to below the average opening speed before the open position is reached to avoid overshoot, and initiate closing (S120) the circuit breaker, wherein the circuit breaker moves with an average closing speed of the contact pair, from the open position to the closed position, and decelerating (S130) the closing speed of the contact pair to below the average closing speed before contact touch at the closed position, wherein the circuit breaker moves with the decelerated speed at contact touch. A motor-driven vacuum circuit breaker, a computer program and a computer program product are also presented.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: October 12, 2021
    Assignee: ABB Schweiz AG
    Inventors: Elisabeth Lindell, Andrea Bianco, Andrea Ricci, Lars Jonsson, Stefan Halén, Lars Liljestrand
  • Patent number: 11146182
    Abstract: A rectifier according to an aspect of the present disclosure includes: a bridge circuit that derives a positive voltage component and a negative voltage component from an AC power supply voltage; a smoothing capacitor that smooths an output voltage from the bridge circuit; a pre-charge resistor that is provided between the bridge circuit and the smoothing capacitor, and reduces an inrush current; a charge switch that is provided in parallel with the pre-charge resistor; and a controller that controls the charge switch between an open state and a close state, wherein when application of the AC power supply voltage to the bridge circuit is started, the controller closes the charge switch if a voltage applied between ends of the pre-charge resistor is determined to become equal to or lower than a predetermined resistor threshold voltage.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: October 12, 2021
    Assignee: FANUC CORPORATION
    Inventors: Takaaki Tagawa, Shinichi Horikoshi
  • Patent number: 11146056
    Abstract: An interface control circuit complying with an interface specification includes: an interface signal transceiver circuit and a protection circuit. The interface signal transceiver circuit is coupled to a first interface connection pin and a second interface connection pin of a first interface connector circuit. The interface signal transceiver circuit is for transmitting and/or receiving an interface signal according to the interface specification. When the interface signal transceiver circuit operates under a first state, the protection circuit determines whether a foreign object exists between the first interface connection pin and the second interface connection pin according to a voltage change or a current change at the second interface connection pin. Under the first state, the interface signal transceiver circuit generates a pull-up signal and a pull-down signal which are toggled with each other at the first interface connection pin.
    Type: Grant
    Filed: May 13, 2020
    Date of Patent: October 12, 2021
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Yu-Jen Cheng, Chih-Wei Mu, Sheng-Tsung Chen, Chieh-Min Lo, Wei-Chung Chang
  • Patent number: 11137789
    Abstract: Systems and methods for multiplying the loop voltage of a coil having one or more turns using multiple coil sections to multiply the loop voltage by a factor equal to the number of coil arc sections. The systems and methods for producing fractional turn windings comprise splitting the initial feed line from the capacitor by as many times as the desired total multiple of the voltage in the capacitor, and applying the feeds to the respective fractional turns or arc sections of the coil.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: October 5, 2021
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Mark Morehouse, Eusebio Garate
  • Patent number: 11136985
    Abstract: A transformer configured for use in connection with a variable speed motor drive includes primary windings and secondary windings. The secondary windings are configured as wye-windings and a ground lead and a plurality of phase leads. The transformer includes a ferrite blocking circuit connected to the ground lead.
    Type: Grant
    Filed: August 31, 2019
    Date of Patent: October 5, 2021
    Assignee: Baker Hughes, a GE Company, LLC
    Inventors: Blayne Prine, Gordon Besser, Gary Williams, Craig Cooper, Vernon Chronister, Jeremy Hillshafer
  • Patent number: 11139745
    Abstract: A flyback converter is disclosed that times a detection time for each cycle of a power switch transistor. The detection time ends when a sense resistor voltage exceeds a threshold voltage. Over a half cycle of an AC input voltage to the flyback converter measures a series of detection time and determines a minimum detection time from the series of detection times. If the minimum detection time exceeds a brownout delay, a brownout condition exists. If the minimum detection time is less than an overvoltage delay, an overvoltage condition exists.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: October 5, 2021
    Assignee: DIALOG SEMICONDUCTOR INC.
    Inventors: Jianming Yao, Mengfei Liu, Wenduo Liu
  • Patent number: 11139749
    Abstract: A semiconductor device includes a rectifier circuit that rectifies an AC input voltage, a zero-cross detection circuit that detects a zero-cross of the AC input voltage, a control circuit that turns on the rectifier circuit at a timing determined by the zero-cross detected by the zero-cross detection circuit and a predetermined phase angle, and the phase angle is set so that an output voltage of the rectifier circuit is gradually increased.
    Type: Grant
    Filed: April 28, 2020
    Date of Patent: October 5, 2021
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventor: Toshihiro Miyazaki
  • Patent number: 11139740
    Abstract: Controller and method for a power converter. For example, the controller includes a first controller terminal coupled to a gate terminal of a transistor. The transistor further includes a drain terminal and a source terminal, and the first controller terminal is at a first voltage as a first function of time. Additionally, the controller includes a second controller terminal coupled to the source terminal. The second controller terminal is at a second voltage as a second function of time. Moreover, the controller includes a third controller terminal coupled to a first resistor terminal of a resistor. The resistor further includes a second resistor terminal, and the third controller terminal is at a third voltage as a third function of time. Also, the controller includes a fourth controller terminal coupled to a first capacitor terminal of a capacitor.
    Type: Grant
    Filed: November 5, 2019
    Date of Patent: October 5, 2021
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Liqiang Zhu, Lieyi Fang
  • Patent number: 11139751
    Abstract: A multiphase multilevel power converter includes a phase module having submodules with an energy storage device. An energy storage device voltage is connectable and disconnectiable as a submodule voltage between two submodule poles. To attenuate higher-frequency components of the connection voltage, a passive frequency filter is provided for each phase module, having a resonant frequency above a sampling frequency of a digital regulating system connecting disconnected submodule voltages and disconnecting connected submodule voltages at successive sampling times. To avoid exciting the point of resonance of the frequency filter, the drive has a controller briefly connecting and again disconnecting at least one of the disconnected submodule voltages at least once within a sampling interval of the regulating system for a submodule voltage connected by the regulating system. A method for driving the multiphase multilevel power converter is also provided.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: October 5, 2021
    Assignee: Siemens Energy Global GmbH & Co. KG
    Inventor: Martin Pieschel
  • Patent number: 11128223
    Abstract: Variable delay time in power converters. At least some example embodiments are methods of operating a power converter, the methods comprising: inducing, by a converter controller, a positive voltage and a positive current on a secondary winding of a transformer of a power converter, the inducing by a bridge circuit coupled to a primary winding of the transformer; creating, by the converter controller, a first ramp signal proportional to the positive current; sensing a first inductor current through a first inductor, the first inductor coupled between the secondary winding and a load, and the sensing creates a signal indicative of the first inductor current; and changing conductive state of a first freewheeling switch from conductive to non-conductive when a magnitude of the first ramp signal crosses a magnitude of the signal indicative of the first inductor current.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: September 21, 2021
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Gang Chen, Marian Poncik, Kieran Burke
  • Patent number: 11128237
    Abstract: In a method for operating an energy converter that couples a first supply network to a second supply network by converting electrical energy via a switch element, the switch element is operated in a switching operation and a supply-network current for one of the supply networks is adjusted depending on a comparison of the supply-network current with a reference current. In a first operating mode for the switching operation, an electrical voltage of one of the supply networks is set by a PWM method on the basis of the comparison, and a second operating mode is provided, in which the switch element is switched when, during the comparison, a difference between the supply-network current and the reference current is greater than a first predefined relative switching value and/or is smaller than a second predefined relative switching value, wherein the first and second operating modes are alternated during the operation.
    Type: Grant
    Filed: May 15, 2019
    Date of Patent: September 21, 2021
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Norbert Benesch, Harald Wiessmann, Franz Bauer
  • Patent number: 11128211
    Abstract: A method and a control circuit for driving an electronic switch coupled to an inductor in a power converter in successive drive cycles each including an on-time and an off-time are disclosed. Driving the electronic switch includes: measuring an inductor voltage during the on-time in a drive cycle in order to obtain a first measurement value; measuring the inductor voltage during the off-time in a drive cycle in order to obtain a second measurement value; obtaining a first voltage measurement signal that is dependent on a sum of the first measurement value and the second measurement value; and adjusting the on-time in a successive drive cycle dependent on a feedback signal and the first voltage measurement signal.
    Type: Grant
    Filed: June 16, 2020
    Date of Patent: September 21, 2021
    Assignee: Infineon Technologies Austria AG
    Inventor: Martin Feldtkeller
  • Patent number: 11128235
    Abstract: A power conversion device includes six semiconductor modules. Each of the six semiconductor modules includes a first terminal (P), a second terminal (N), and a third terminal (AC) on its surface. The first terminals of two semiconductor modules configuring a semiconductor module group of the same phase are arranged to be opposed to each other. A plurality of semiconductor module groups are arranged in a direction perpendicular to an arrangement direction of two semiconductor modules in the semiconductor module group.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: September 21, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yukio Nakashima, Takayoshi Miki
  • Patent number: 11128228
    Abstract: A switching power supply device includes a transformer for voltage conversion, a synchronous rectification MOS transistor, and a secondary side control circuit. The synchronous rectification MOS transistor is connected in series to a secondary side coil of the transformer. The secondary side control circuit performs on/off control of the synchronous rectification MOS transistor based on a drain voltage of the synchronous rectification MOS transistor. The secondary side control circuit includes a peak period detection circuit and a determination reference voltage generation circuit. The peak period detection circuit detects a peak period of the drain voltage. The determination reference voltage generation circuit generates a reference voltage to be used as a reference for determining the peak period based on a voltage in the peak period. The peak period detection circuit detects the peak period based on the drain voltage and on the reference voltage.
    Type: Grant
    Filed: March 9, 2020
    Date of Patent: September 21, 2021
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Takumi Hyugaji, Takeshi Sato, Minoru Kado
  • Patent number: 11121641
    Abstract: The present invention discloses a high-power machine drive system based on a modular multilevel converter (MMC), which belongs to the technical field of power generation, power transformation, or power distribution. The high-power machine drive system consists of a modular multilevel converter and a multi-pulse cycloconverter. The MMC outputs k phases of high-frequency AC voltages with a phase difference of 2?/k, and the multi-pulse cycloconverter outputs a low-frequency voltage to drive a corresponding machine. According to the present invention, the MMC is combined with the multi-pulse cycloconverter, and by adopting the MMC that operates at a high frequency, the capacity, the volume, and the weight of the energy storage capacitor of the MMC are reduced, the voltage level at the DC side of the MMC is increased, and the capacity of the drive system is increased.
    Type: Grant
    Filed: January 2, 2020
    Date of Patent: September 14, 2021
    Assignee: Southeast University
    Inventors: Fujin Deng, Pengyuan Jiang, Yihua Hu
  • Patent number: 11119518
    Abstract: The present disclosure relates to a voltage regulation circuit (100).
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: September 14, 2021
    Assignee: ECONOPOWER PTY LTD
    Inventors: Shaune Speed, Mark Barber
  • Patent number: 11120939
    Abstract: An auto transformer rectifier unit (ATRU) is provided. The ATRU comprises a transformer configured to receive a three-phase alternating current input and produce a ten-phase alternating current output, and a rectifier configured to receive the ten-phase alternating current output and output a bipolar direct current.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: September 14, 2021
    Assignee: The Boeing Company
    Inventor: Jian Huang
  • Patent number: 11114931
    Abstract: An AC-DC power converter can include: a front-stage power circuit; a rear-stage power circuit configured to share one power switch as a main power switch with the front-stage power circuit, where the rear-stage power circuit is coupled to a load, and a first magnetic component of the front-stage power circuit and a second magnetic component of the rear-stage power circuit are not coupled in one conductive loop from a positive terminal of a DC input voltage to a negative terminal of the DC input voltage; and an energy storage capacitor coupled to the front-stage power circuit and the rear-stage power circuit, where a common node of the first and second magnetic components is directly coupled to the power switch.
    Type: Grant
    Filed: October 7, 2019
    Date of Patent: September 7, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Qiukai Huang, Jian Deng