Patents Examined by Thienvu V. Tran
  • Patent number: 10811983
    Abstract: The present disclosure provides a power electronic conversion unit and a power electronic conversion system. The power electronic conversion unit includes: two AC/DC subunits, AC ports of which are coupled in series to form a first port; two half-bridge subunits, DC ports of which are coupled to DC ports of the two AC/DC subunits, respectively; and a transformer, wherein two terminals of a primary winding of the transformer are coupled to a midpoint of bridge arms of the two half-bridge subunits. And a power electronic conversion system comprises a plurality of power electronic conversion units.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: October 20, 2020
    Assignee: Delta Electronics (Shanghai) CO., LTD
    Inventors: Cheng Lu, Wenfei Hu, Tao Xia
  • Patent number: 10811962
    Abstract: A multi-level switching power converter includes a multi-level power stage circuit which converts an input power to an output power. The power stage circuit includes an inductor, a conversion capacitor and plural power switches. The controller circuit controls the multi-level power stage circuit and includes: a feedback pulse generator circuit which generates a trigger pulse; a first timer circuit and a second timer circuit which determine a first time period and a second time period respectively according to the trigger pulse; and an adjusting circuit which adjusts the first time period according to a difference between the voltage across the conversion capacitor and a reference voltage such that an average of the voltage across the conversion capacitor is substantially equal to a level of the reference voltage.
    Type: Grant
    Filed: November 12, 2019
    Date of Patent: October 20, 2020
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Yung-Chun Chuang, Tsung-Wei Huang
  • Patent number: 10811975
    Abstract: In at least one illustrative embodiment, a three-stage power converter includes a rectifier having an input to receive three-phase alternating-current (AC) and an output coupled to a first direct-current (DC) bus, a buck converter having an input coupled to the first DC bus and an output coupled to a second DC bus, and an LLC resonant converter having an input coupled to the second DC bus and an output to provide a DC charging current to a battery. The buck converter may be operable across a range of duty cycles to adjust a voltage level supplied to the second DC bus, and the LLC resonant converter may be operable in a plurality of modes to provide a plurality of discrete gain levels.
    Type: Grant
    Filed: April 18, 2019
    Date of Patent: October 20, 2020
    Assignee: ABB Schweiz AG
    Inventors: Sandeep Bala, Jing Xu
  • Patent number: 10811966
    Abstract: A digital constant on-time controller adaptable to a direct-current (DC)-to-DC converter includes a current sensing circuit that senses stored energy of the DC-to-DC converter, thereby generating a sense voltage; a semi-amplitude detector that detects half of a peak-to-peak amplitude of the sense voltage, thereby generating a semi-amplitude voltage; a DC voltage detector that detects a DC voltage across an effective series resistor of an energy storage circuit that provides the stored energy of the DC-to-DC converter, thereby generating a DC voltage; an arithmetic device that adds the sense voltage and the semi-amplitude voltage, from which the DC voltage and a predetermined reference signal are subtracted; and a pulse-width modulation (PWM) generator that generates a switch control signal according to a result of the arithmetic device.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: October 20, 2020
    Assignees: NCKU Research and Development Foundation, Himax Technologies Limited
    Inventors: Kai-Yu Hu, Chien-Hung Tsai
  • Patent number: 10811965
    Abstract: Systems and methods are provided for regulating a power converter. An example system controller includes: a driver configured to output a drive signal to a switch to affect a current flowing through an inductive winding of a power converter, the drive signal being associated with a switching period including an on-time period and an off-time period. The switch is closed in response to the drive signal during the on-time period. The switch is opened in response to the drive signal during the off-time period. A duty cycle is equal to a duration of the on-time period divided by a duration of the switching period. One minus the duty cycle is equal to a parameter. The system controller is configured to keep a multiplication product of the duty cycle, the parameter and the duration of the on-time period approximately constant.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: October 20, 2020
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Qian Fang, Cong Lan, Lieyi Fang
  • Patent number: 10811953
    Abstract: A power supply device comprises: a first switching circuit that includes a series circuit, connected between a predetermined voltage level and a ground level, having a high side switching element and a low side switching element connected in series that are alternately turned on and off at a predetermined frequency; a second switching circuit that includes a switching element controlled between on and off, the switching element having one end being connected to the ground level, and that makes an ON time point of the switching element variable; and a control unit that performs control such that ON time points of the switching element and the high side switching element are not overlapped with each other.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: October 20, 2020
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Masayoshi Hirota, Keiji Tashiro
  • Patent number: 10811938
    Abstract: Radial direction outer side sizes of a first rectifying unit, a circuit board, and a second rectifying unit configuring a rectifying device are disposed so as to be sequentially smaller in a direction away from a frame of a rotating electrical machine main body, and at predetermined intervals, a cover covering the rectifying device has a cover end wall portion, a cover outer wall portion, and a cover intermediate portion, an inner peripheral side inlet portion is formed in the cover end wall portion, an outer peripheral side inlet portion is formed in the cover intermediate portion, and the outer peripheral side inlet portion is formed of an axial direction covering portion, and a radial direction covering portion that connects the axial direction covering portion and an outer peripheral portion of the cover end wall portion.
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: October 20, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masao Akiyoshi, Yuzuru Kobayashi
  • Patent number: 10811956
    Abstract: A controller for a multiple output power converter, including an error amplifier configured to generate an error signal based on a difference between an output signal of a multiple output power converter and a reference signal. A switch request circuit is configured to generate a request signal in response to the error signal. The switch request circuit is further configured to control a switching of a power switch of the multiple output power converter to transfer energy from an input of the multiple output power converter to an output of the multiple output power converter. A power limit fault circuit is configured to receive the request signal and the error signal, the power limit fault circuit further configured to generate a first fault signal in response to detection of an output overload or short circuit.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: October 20, 2020
    Assignee: Power Integrations, Inc.
    Inventors: Karl Moore, Antonius Jacobus Johannes Werner
  • Patent number: 10811918
    Abstract: A stack structure of a rotor core, includes: a plurality of first core layers, each of the first core layers being formed by stacking first core sheets, each of the first core sheets including: an annular base having a shaft through-hole at a central portion thereof; a plurality of yokes spaced apart from each other to be arranged along a circumferential direction of the base and to form a plurality of magnet insertion parts for accommodating magnets; and a plurality of bridges connecting the base and the yokes; and a plurality of second core layers, each of the second core layers being formed by stacking second core sheets, each of the second core sheets including: a plurality of yokes in which the bases and the bridges are removed from the first core sheet, wherein the first core layers and the second core layers are alternately stacked.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: October 20, 2020
    Assignee: NEW MOTECH CO., LTD.
    Inventors: Jeong Cheol Jang, Ji Min Lee, Nam Jong Kim
  • Patent number: 10809752
    Abstract: A technique for improving the stability of a voltage reference is provided. The implementation of technique is simple and elegant and does not involve a noise penalty. A compensation resistor is provided on one end of a string of resistors used to set a ?VBE in a PTAT cell and to set a gain applied to the PTAT cell voltage.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: October 20, 2020
    Assignee: Analog Devices International Unlimited Company
    Inventors: Jonathan Ephraim David Hurwitz, Gergely Toldi
  • Patent number: 10811587
    Abstract: Josephson transmission lines (JTLs) for superconducting devices and related methods are provided. In one example, a device comprising a JTL for propagating quantum pulses in a first direction in response to an application of a clock signal having a plurality of phases is provided. The JTL may include a first inductive element coupled between a first terminal and a second terminal, a first Josephson junction (JJ) coupled between the second terminal and a ground terminal, a second inductive element coupled between the second terminal and a third terminal, and a second JJ coupled between the third terminal and the ground terminal. The second inductive element is configured to form an inductive loop, and the inductive loop may be configured to operate in a mode such that a quantum pulse cannot travel in a second direction opposite from the first direction regardless of a phase of the clock signal.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: October 20, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventor: Alexander L Braun
  • Patent number: 10804816
    Abstract: A method and apparatus for power conversion comprising a three-port converter comprising a DC port for coupling to an external DC line, an AC port for coupling to an external AC line, and a storage port, internal to the three-port converter, for storing excess energy and discharging needed energy during power conversion, wherein the storage port is located on a DC-side of the three-port converter and is decoupled from the DC port such that a voltage on the storage port can be controlled independently of a DC voltage on the DC port.
    Type: Grant
    Filed: December 30, 2013
    Date of Patent: October 13, 2020
    Assignee: Enphase Energy, Inc.
    Inventor: Michael J. Harrison
  • Patent number: 10802520
    Abstract: A system can include a device under test (DUT) having a DUT voltage, a cable connected to the DUT, the cable having a cable inductance, and a power supply configured as a current source to provide a wide bandwidth voltage source to the DUT, wherein the DUT voltage is independent of the cable inductance.
    Type: Grant
    Filed: April 12, 2013
    Date of Patent: October 13, 2020
    Assignee: Keithley Instruments, LLC
    Inventors: Kevin Cawley, Wayne Goeke, Gregory Sobolewski
  • Patent number: 10802519
    Abstract: One or more of the present embodiments allows multiple controllers to be automatically configured as a single or multi-rail voltage regulator system using a local bus that can communicate between controllers with a minimal set of pinstraps. This allows the system to be configured with a reduced set of configuration pins and without the need for stored configurations in the controller's own memory or configurations performed by an external host.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: October 13, 2020
    Assignee: Renesas Electronics America Inc.
    Inventor: Michael Lyndon Payne
  • Patent number: 10802521
    Abstract: A voltage regulation system has a voltage regulator, a current-limiting circuit, and a feed-forward circuit. The voltage regulator regulates an output voltage to a desired voltage level. The current-limiting circuit controls an output current of the voltage regulator to a desired current level. The feed-forward circuit, which has a fast response time, controls an inrush current in the output current caused by a decrease in an output voltage.
    Type: Grant
    Filed: January 1, 2019
    Date of Patent: October 13, 2020
    Assignee: NXP USA, Inc.
    Inventors: Liang Qiu, Meng Wang, John Pigott
  • Patent number: 10804710
    Abstract: The invention provides a bidirectional converter that operates under an AC generation mode or a charge mode. The bidirectional converter may be a single component or circuit, which may include a DC-DC conversion stage using a unique “Smith 2 Stage conversion” technique and a DC-AC conversion stage or AC-DC conversion stage using a switchable filter depending on the mode. During the charge mode, the converter may be able to control the voltage and current of the DC output using a software algorithm, to match the battery being charged, or the DC receiver. This may enable the converter to control the nature of the DC output so it can be adapted to any energy storage technology. The controllable output voltage and synchronizable frequency may allow the converter to be used in series combinations to achieve a variety of high voltage outputs from simpler building blocks.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: October 13, 2020
    Assignee: STEM, INC
    Inventor: Lynn Smith
  • Patent number: 10795389
    Abstract: An electronic device including a low dropout regulator having an output coupled to a first conduction terminal of a transistor, with a second conduction terminal of the transistor being coupled to an output node of the electronic device. A method for operating the device to switch into a power on mode includes: turning on the low dropout regulator, removing a DC bias from the second conduction terminal of the transistor, and turning on the transistor. A method for operating the device to switch into a power down mode includes: turning off the transistor, forming the DC bias at the second conduction terminal of the transistor, and turning off the low dropout regulator.
    Type: Grant
    Filed: December 12, 2018
    Date of Patent: October 6, 2020
    Assignee: STMicroelectronics International N.V.
    Inventors: Kapil Kumar Tyagi, Nitin Gupta
  • Patent number: 10795391
    Abstract: A system includes a voltage regulator having an output voltage; a power management system, coupled to the voltage regulator, operable to continuously monitor the output voltage to determine whether the output voltage is within a range; and the power management system is operable to set the range to a normal range during normal operation, and is operable to increase the range beyond the normal range during a low power mode and during a wake-up period from a low power mode.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: October 6, 2020
    Assignee: Texas Instruments Incorporated
    Inventors: Ruchi Shankar, Somshubhra Paul, Gaurang Helekar
  • Patent number: 10797604
    Abstract: An LLC converter includes a switch module, a transformer, an output circuit, a resonant circuit and a safety capacitor. The switch module is connected between an input voltage and a ground. The transformer has a primary side winding and at least one secondary side winding. The output circuit is connected between the at least one secondary side winding and a load. The resonant circuit is coupled between the primary side winding and the switch module and includes at least one leakage inductor. The safety capacitor is connected between the at least one leakage inductor and the switch module.
    Type: Grant
    Filed: August 19, 2019
    Date of Patent: October 6, 2020
    Assignee: ASIAN POWER DEVICES INC.
    Inventors: Tsung-Liang Hung, Yeu-Torng Yau
  • Patent number: 10797598
    Abstract: According to an aspect of one or more exemplary embodiments, there is provided a constant on-time controller for a buck converter with calibrated ripple injection in continuous conduction mode. The constant on-time controller may include a pulse width modulator (PWM) comparator that generates an on-time request, an error amplifier that regulates an average feedback voltage to an internal reference voltage, and passes a feedback node ripple signal to an input of the PWM comparator, an on-time generator that outputs an on-time signal that controls an on-time of the buck converter based on the on-time request, a MOSFET driver that drives the buck converter based on the output of the on-time generator, and an injection signal generator coupled to the on-time generator, wherein the injection signal generator may include a first switch and a second switch, a fixed signal generator, and a bias current source.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: October 6, 2020
    Assignee: Microchip Technology Incorporated
    Inventors: Venkata Murali Krushna Malla, Surya Prakash Rao Talari, Ioan Stoichita, Matthew Weng