Patents Examined by Htet Z Kyaw
  • Patent number: 12113448
    Abstract: A flyback converter is provided in which either auxiliary winding or the primary winding is split into two windings. In this fashion, a different turn ratio is presented to the secondary winding during the transformer reset period as compared to when an active-clamp transistor or a ZVS switch transistor is switched on.
    Type: Grant
    Filed: July 28, 2021
    Date of Patent: October 8, 2024
    Assignee: DIALOG SEMICONDUCTOR (UK) LIMITED
    Inventors: Huaming Guo, Yi Xu, Zhaowu Luo, Yongcai Lai, Jianming Yao
  • Patent number: 11955908
    Abstract: An energy storage system can include a battery, a power converter comprising a first plurality of switching devices coupled to the battery and a second plurality of switching devices coupled between the first plurality of switching devices and an AC power system, and control circuitry that determines whether the AC power system is a single/split phase system or a three phase system and operates the first and second pluralities of switching devices accordingly. The control circuitry can include a microcontroller and a plurality of voltage sensors each configured to monitor a magnitude and a phase of a voltage to allow the control circuitry to determine whether the AC power system is a single/split phase system or a three phase system and whether the AC power system is connected with a line to line or line to neutral fault condition.
    Type: Grant
    Filed: July 28, 2021
    Date of Patent: April 9, 2024
    Assignee: Apple Inc.
    Inventors: Ashish K. Sahoo, Brandon Pierquet
  • Patent number: 11916472
    Abstract: A method for operating a power converter arrangement and a corresponding controller are disclosed. The method includes operating the power converter arrangement in a surge mode, when a DC link voltage of the power converter arrangement reaches a first voltage threshold. The power converter includes a first power converter having an input and an output; a second power converter having an input and an output; and a DC link capacitor circuit coupled to the output of the first power converter and the input of the second power converter and providing the DC link voltage. Operating the power converter arrangement in the surge mode includes: deactivating the second power converter; and operating, at least temporarily, the first power converter in a reverse mode to transfer energy from the DC link capacitor circuit to the input of the first power converter.
    Type: Grant
    Filed: November 24, 2021
    Date of Patent: February 27, 2024
    Assignee: Infineon Technologies Austria AG
    Inventor: Gerald Deboy
  • Patent number: 11909302
    Abstract: A method for operating a multi-level bridge power converter of an electrical power system connected to a power grid includes providing a plurality of switching devices of the power converter in an active neutral point clamped topology. The method also includes operating the plurality of switching devices in a plurality of operating states such that current simultaneously flows through at least two parallel recovery paths of the plurality of switching devices during operation of the power converter to minimize a commutation path of the current when at least one diode of the plurality of switching devices recovers, thereby reducing parasitic inductance affecting the recovering antiparallel diode or the switch.
    Type: Grant
    Filed: March 12, 2021
    Date of Patent: February 20, 2024
    Assignee: GE Infrastructure Technology LLC
    Inventors: Fernando Arturo Ramirez Sanchez, Robert Gregory Wagoner, Nathaniel Robert Michener
  • Patent number: 11901815
    Abstract: Disclosed are a voltage compensation method and device of a voltage reducing circuit. The voltage compensation method includes: determining a capacitance value of each capacitor and a resistance value of each resistor in a voltage compensation circuit according to a voltage compensation expectation of the voltage reducing circuit; determining each zero and each pole of a transfer function of the voltage compensation circuit according to the capacitance value of each capacitor and the resistance value of each resistor; setting each capacitor and the resistor not in direct connection with the capacitor in series to have a positive temperature coefficient, and setting the resistor in direct connection with the capacitor in series to have a negative temperature coefficient; and compensating voltage for the voltage reducing circuit by using the voltage compensation circuit to output a rated voltage.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: February 13, 2024
    Assignee: INSPUR SU ZHOU INTELLIGENT TECHNOLOGY CO., LTD.
    Inventors: Yingchao Li, Dali Li
  • Patent number: 11881776
    Abstract: Examples relate to adjusting a switching frequency of a voltage regulator to operate the voltage regulator at a predetermined power efficiency. Examples described herein include receiving load information corresponding to a component that receives regulated power from the voltage regulator, determining, from a repository, a predetermined value of the switching frequency of the voltage regulator based on the load information to attain the predetermined power efficiency of the voltage regulator and adjusting the switching frequency of the voltage regulator to the predetermined value of the switching frequency to operate the voltage regulator at the predetermined power efficiency.
    Type: Grant
    Filed: May 24, 2021
    Date of Patent: January 23, 2024
    Assignee: Hewlett Packard Enterprise Development LP
    Inventor: Jen-Ta Su
  • Patent number: 11848587
    Abstract: The present invention relates to a rotary micromotor (10) designed for actuating an abrasive blade (4) of a surgical or dental tool, the motor comprising a rotor (11) co-operating with a stator (12), and being characterized in that the rotor (11) has a hollow central tubular portion, and comprises an outwardly polarized Halbach array.
    Type: Grant
    Filed: July 7, 2021
    Date of Patent: December 19, 2023
    Assignee: Bien-Air Holding SA c/o Bien-Air Dental SA
    Inventor: David Bühlmann
  • Patent number: 11843319
    Abstract: An LLC resonant converting apparatus determines to operate as a half-bridge LLC resonant converter or a full-bridge LLC resonant converter based on the magnitude of the input voltage. The present disclosure can solve the problem that the input voltage range of the LLC resonant converter is not wide enough.
    Type: Grant
    Filed: October 9, 2021
    Date of Patent: December 12, 2023
    Assignee: ASIAN POWER DEVICES INC.
    Inventor: Tsung-Liang Hung
  • Patent number: 11824466
    Abstract: A power supply including an input configured to receive input power, an output configured to provide output power to a load, at least one relay, a crowbar circuit configured to selectively divert the input power away from the load, and a controller configured to detect a high-voltage condition at the input, activate, in response to detecting the high-voltage condition at the input, the crowbar circuit to divert the input power away from the load, output, in response to detecting the high-voltage condition at the input, a signal to operate the at least one relay to transition from a first state to a second state, and deactivate the crowbar circuit in response to a determination that the at least one relay has transitioned to the second state.
    Type: Grant
    Filed: December 18, 2020
    Date of Patent: November 21, 2023
    Assignee: SCHNEIDER ELECTRIC IT CORPORATION
    Inventors: Qinghong Yu, Camilo Mejia, Daniel Santinho Lopes, Jeffrey M. August
  • Patent number: 11824442
    Abstract: An error amplifier circuit for a DC-DC power converter controller is disclosed for providing an amplified error signal to a switch control circuit, the circuit comprising an error amplifier first stage. The first stage comprises: a first input terminal for receiving a voltage proportional to an output voltage of the converter; an output node; a first operational transconductance amplifier in a first path between the input terminal and the output node and having a first input connected to the input terminal, a second input connectable to a reference signal, and an output connected to the output node; and a second, parallel, path comprising a series combination of an amplifier, a second OTA and a capacitor. The second OTA has an output connected to the capacitor, a first input connected to an output of the amplifier, and a second input connected to the output. Associated control circuits, controllers and converters are also disclosed.
    Type: Grant
    Filed: June 8, 2021
    Date of Patent: November 21, 2023
    Assignee: NXP USA, Inc.
    Inventor: Denis Sergeevich Shuvalov
  • Patent number: 11817787
    Abstract: One example discloses a switch mode power supply (SMPS) circuit configured to receive an input voltage and generate an output voltage, including: a set of switching devices configured to receive the input voltage; a first transformer, having an input winding coupled to the switching devices, and an output winding configured to generate the output voltage; a second transformer, having an input winding coupled to receive the output voltage from the first transformer, and an output winding configured to generate an output voltage monitoring signal; and a controller configured to control the switching devices based on the output voltage monitoring signal.
    Type: Grant
    Filed: January 28, 2021
    Date of Patent: November 14, 2023
    Assignee: NXP B.V.
    Inventor: Hendrik Jan Boswinkel
  • Patent number: 11811329
    Abstract: The present invention is directed to Bidirectional Multimode Power Converter which employs a high frequency dynamically varying amplitude modulation and voltage steering method to convert the source AC or DC voltages to output AC or DC voltages with programmable output voltage levels, output voltage frequency and duration. The Bidirectional Multimode Power Converters of the present invention support: inrush current control, turning off the idle converter, line voltage brown out protection, soft start, high pre-charge voltage generation, soft shut down of converter, dimming operation, programmable time of the day operation and operation for specified duration of time. The Bidirectional Multimode Power Converters of the present invention support coupling of multiple power sources for bidirectional power conversion.
    Type: Grant
    Filed: February 25, 2021
    Date of Patent: November 7, 2023
    Inventor: Viswa Nath Sharma
  • Patent number: 11799370
    Abstract: The present disclosure provides a series resonant converter and its corresponding control method. In one aspect, the series resonant converter includes m (m=1,2,3, . . . ) sets of primary side stages in parallel, wherein each primary side stage is identical and includes n (n=2,3, . . . ) stacked element circuits, where the primary side stages receive an input voltage; n×m resonant networks coupled to the primary side stages; n×m transformers having n×m primary side windings and n×m secondary side windings, where the primary side windings are coupled to the n×m resonant networks; p (p=1,2,3, . . . ) sets of secondary side stages in parallel, wherein each secondary side stage is identical and includes q (q=n×m/p) stacked element circuits, where the secondary side stages are coupled to n×m secondary side windings; and a control block controlling the primary side switches according to the output voltage, input voltage and input capacitor voltages.
    Type: Grant
    Filed: June 30, 2021
    Date of Patent: October 24, 2023
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Chi Zhang, Zhiyu Shen, Ruxi Wang, Peter Mantovanelli Barbosa
  • Patent number: 11764647
    Abstract: An electrical power system includes an electrical machine having one or more windings and an AC-DC power electronics converter including a commutation cell having a power circuit and a gate driver circuit. The power circuit includes a plurality of power semiconductor switching elements and a capacitor. The gate driver circuit is electrically connected to and configured to provide switching signals to a gate terminal of each power semiconductor switching element. A peak rated power output of the electrical machine and the AC-DC power electronics converter is greater than 25 kW, a maximum efficiency of the AC-DC power electronics converter is greater than 97%, and a value of parameter ? is greater than or equal to 0.3 PV/s2, where ? is a product of a maximum switching frequency of the switching signals and a maximum rate of change of a source-drain voltage of the plurality of power semiconductor switching elements.
    Type: Grant
    Filed: August 31, 2022
    Date of Patent: September 19, 2023
    Assignee: Rolls-Royce Deutschland Ltd & Co KG
    Inventors: Uwe Waltrich, Stanley Buchert, Marco Bohlländer, Claus Müller
  • Patent number: 11764637
    Abstract: An inner-rotor motor including: an armature assembly including a rotating shaft, an armature unit coupled to the rotating shaft and a pressing unit; a frame assembly including a frame housing the armature unit, a first bearing unit located on one side with respect to the armature unit in an axial direction, and a second bearing unit located on another side with respect to the armature unit in the axial direction; and an urging structure that urges the rotating shaft in a direction away from the second bearing unit and that presses the pressing unit toward the first bearing unit.
    Type: Grant
    Filed: November 19, 2021
    Date of Patent: September 19, 2023
    Assignee: MINEBEA MITSUMI Inc.
    Inventors: Hiroaki Mochizuki, Minoru Kuroda
  • Patent number: 11716015
    Abstract: A switch mode power supply includes a bootstrap circuit, control circuits, and an auxiliary winding coupled to the bootstrap circuit and configured to supply power to the control circuits after startup of the power supply. The bootstrap circuit is configured to supply power to the control circuits during startup and includes an isolation circuit to limit current flow between the starting capacitor and the control circuits while the starting capacitor is charged to a starting voltage by the high voltage input. During the initial charge of the starting capacitor, the control circuits do not have power to provide the initial functionality of the power supply. Once the starting capacitor is charged to the starting voltage, the isolation circuit is activated to allow current flow that powers the control circuits during the remainder of the startup until the auxiliary winding is able to power the control circuits.
    Type: Grant
    Filed: February 11, 2021
    Date of Patent: August 1, 2023
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Bora Novakovic, Jatinkumar K. Patel, Rangarajan M. Tallam, Robert W. Reese
  • Patent number: 11641156
    Abstract: A method for controlling a fault of a three phase four wire interlinking converter system according to one embodiment of the present disclosure comprises obtaining a first d-q-o coordinate plane based on an internal phase angle of output voltage produced from each phase of an inverter; converting the first d-q-o coordinate plane to a second d-q-o coordinate plane based on the o-axis configured differently from the first d-q-o coordinate plane; obtaining an output voltage vector for determining a fault location by performing d-q transform on the second d-q-o coordinate plane; determining occurrence of a fault and an area related to the fault based on the output voltage vector; and in the occurrence of the fault, allocating a zero voltage vector to the area related to the fault.
    Type: Grant
    Filed: June 21, 2021
    Date of Patent: May 2, 2023
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Chung Yuen Won, Kwang Su Na, Mi Na Kim, Bong Yeon Choi, Kyoung Min Kang, Hoon Lee, Chang Gyun An, Tae Gyu Kim, Jun Sin Yi
  • Patent number: 11637503
    Abstract: A frequency converter adapted to be connected to another frequency converter via a direct current bus is provided. The frequency converter comprises: a positive bus interface adapted to be interconnected with a positive bus interface of the other frequency converter; an external bleeder resistor interface adapted to be interconnected with an external bleeder resistor interface of the other frequency converter; and a first control logic which controls a parallel connection, between the frequency converter and the other frequency converter and realized by a direct current bus, to be turned on or off. A corresponding frequency converter assembly, a control method, and a computer readable storage medium are also provided.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: April 25, 2023
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Ya Jun Zhou
  • Patent number: 11611283
    Abstract: A switching power supply unit includes: a transformer; an inverter circuit including first to fourth switching devices, first to third capacitors, first and second rectifying devices, a resonant inductor, and a resonant capacitor; and a driver. The first to fourth switching devices are coupled in series. The first and second capacitors are coupled in series. The first rectifying device is disposed between a first connection point between the first and second capacitors and a second connection point between the first and second switching devices. The second rectifying device is disposed between the first connection point and a third connection point between the third and fourth switching devices. The third capacitor is disposed between the second and third connection points. The resonant capacitor, the resonant inductor, and a primary winding are coupled in series between a fourth connection point between the second and third switching devices and the first connection point.
    Type: Grant
    Filed: May 11, 2021
    Date of Patent: March 21, 2023
    Assignee: TDK CORPORATION
    Inventors: Masahiko Hirokawa, Xiaofeng Wu, Naoyuki Ishibashi
  • Patent number: 11606023
    Abstract: A discharge device is provided. The discharge device discharges an internal power of an electronic device. The discharge device includes a voltage regulation circuit, a charge storage circuit, a control signal generator and a discharge path. The voltage regulation circuit regulates the internal power to a regulated power. The charge storage circuit stores the regulated power. The control signal generator is configured to receive the regulated power and an external power, enabled according to the regulated power, and generating a control signal in response to a voltage level of the external power. The discharge path is configured to receive the internal power, and turned on according to the control signal to discharge the internal power.
    Type: Grant
    Filed: October 8, 2020
    Date of Patent: March 14, 2023
    Assignee: Winbond Electronics Corp.
    Inventor: Ying-Ting Ma