Patents Examined by Gary L. Laxton
  • Patent number: 10651734
    Abstract: A voltage regulator includes power stages and a controller. The power stages are configured to provide power to a load in response to a pulse-width modulated (PWM) signal and to provide a body braking to the load in response to a body braking signal. The body braking is provided via a body diode of the power stage. The controller is configured to provide the PWM signals to a first power stage and a second power stage based upon a power demand of the load, to provide body braking signals to the first power stage and the second power stage in response to an over-voltage condition on the load, and to suspend the first body braking signal to the first power stage and maintain the second body braking signal to the second power stage, in response to an over-temperature condition on the first power stage.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: May 12, 2020
    Assignee: Dell Products, L.P.
    Inventors: Guangyong Zhu, Mehran Mirjafari, Ralph Johnson
  • Patent number: 10644586
    Abstract: A method includes operating a power converter in a first mode of operation, where the power converter includes multiple first switches and multiple boost diodes coupled to multiple first rails. Each first rail is also coupled to a different one of multiple boost inductors, and the power converter is coupled to multiple second rails. The power converter in the first mode converts electrical power transported between the first and second rails. The method also includes, during the first mode of operation, operating multiple second switches coupled in parallel across the boost diodes as synchronous switches. Each second switch is coupled across a different one of the boost diodes. The method further includes switching the power converter to a second mode of operation in which the first switches are deactivated and the second switches and the boost diodes operate as a full-bridge power converter.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: May 5, 2020
    Assignee: Raytheon Company
    Inventor: Saeed Alipour
  • Patent number: 10637344
    Abstract: A source-grounded amplifier circuit supplied with a signal of an error amplifier circuit, and an output transistor supplied with a control voltage of the source-grounded amplifier circuit are provided. The source-grounded amplifier circuit has, in a signal path, a current limiting circuit including a cascode circuit controlled by a voltage having a positive temperature coefficient. A voltage regulator capable of reducing a dropout voltage of an output voltage without exceeding a gate breakdown voltage of the output transistor is provided.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: April 28, 2020
    Assignee: ABLIC INC.
    Inventors: Tsutomu Tomioka, Masakazu Sugiura
  • Patent number: 10635124
    Abstract: Some embodiments include apparatuses and methods of using such apparatuses. One of the apparatuses includes a control circuitry to generate error information based on a value of the feedback voltage generated from an output voltage, generate output information to control a power switching unit based on the error information provided to a forward path in the control circuitry, and adjust a gain of the forward path based on a gain factor computed based at least in part on a first value of the output information in order to cause the output information to have a second value. The control circuitry also computes a value of correction information when the output voltage is within a target value range, and adjusts the control information, based on the correction information, when the output voltage is outside the target value range.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: April 28, 2020
    Assignee: Intel Corporation
    Inventors: Tarun Mahajan, Ramnarayanan Muthukaruppan, Rajesh Sidana, Srinath B. Pai
  • Patent number: 10630203
    Abstract: This bidirectional power conversion system for a single-phase electric load is intended to be connected to a continuous supply bus delivering a single supply voltage and deliver to the load an alternating output voltage substantially in a cradle form. It includes a set of intertwined converters able to jointly deliver a control voltage whose phase shift of its fundamental component with respect to the output voltage is intended to control the transfer of power between converters and the load, said converters being controlled in such a way that the amplitude of the average value of the control voltage corresponds to the amplitude of the alternating output voltage and in such a way that said control voltage has amplitudes capable of reducing the fluctuations of a current flowing between the voltage converters and the load.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: April 21, 2020
    Assignee: GE ENERGY POWER CONVERSION TECHNOLOGY LIMITED
    Inventor: Nicolas Lapassat
  • Patent number: 10630163
    Abstract: A pulse width modulation method, a pulse width modulation system, and a controller are provided, which change a change rate of a common-mode component of a three-phase converter upon a change of a converter modulation degree, thereby improving stability and harmonic characteristics of the three-phase converter and implementing flexible adaptive adjustment. An example pulse width modulation method includes: obtaining initial three-phase modulation waves and a converter modulation degree; calculating a common-mode-component change-rate adjustment coefficient based on preset modulation parameters and the converter modulation degree; selecting a modulation wave having a minimum absolute value from the modulation wave set as a common-mode modulation wave; and performing waveform superposition on the initial three-phase modulation waves and the common-mode modulation wave to obtain output three-phase modulation waves.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: April 21, 2020
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Fangcheng Liu, Kai Xin, Haibin Guo
  • Patent number: 10630200
    Abstract: A control circuit reduces switching loss by periodically stopping switching elements, and reduces the difference between the time for which positive switching elements are in on state and the time for which negative switching elements are in on state. The control circuit includes a command value signal generator generating command value signals Xu1, Xv1, and Xw1 from line voltage command value signals Xuv, Xvw, and Xwu, and includes a PWM signal generator generating PWM signals by the command value signals Xu1, Xv1, and Xw1. The command value signals Xu1, Xv1, and Xw1 are continuously at “0” for a predetermined period, and are continuously at “2” for another period. This enables reducing the difference between the period for which the PWM signals are low and the period for which they are high.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: April 21, 2020
    Assignee: DAIHEN Corporation
    Inventors: Nobuyuki Hattori, Akihiro Ohori, Hiroki Munechika
  • Patent number: 10630189
    Abstract: A system and method is directed to charging and discharging an energy-tank capacitor of a power supply unit (PSU) in a computing system. The PSU has a forward converter, a buck converter, a switch box, and an option box. The forward converter has a transformer. A primary winding of the transformer is coupled to an input of the PSU, while a secondary winding of the transformer is coupled to an output of the PSU. Two or more components of the forward converter are shared with the buck converter to support the functionality of the buck converter when it is enabled. The switch box has a power switch and a controller switch connected to the forward converter. The energy stored on the energy-tank capacitor is capable of supporting power consumption of the server system during a hold-up time, when an input power to the PSU is interrupted.
    Type: Grant
    Filed: May 15, 2019
    Date of Patent: April 21, 2020
    Assignee: QUANTA COMPUTER INC.
    Inventors: Kuang-Hua Ouyang, Shu-Chen Ni, Chin-Hsiang Chan, Yue-Hwa Shih, Chun-Lung Cheng
  • Patent number: 10622887
    Abstract: A zero current detector control circuit controls a voltage applied to a zero current detector (ZCD) input of a power factor corrector integrated circuit (PFC IC) that produces a driver output having an on time and an off time. The zero current detector control circuit includes a voltage detection input circuit coupled to a rectified AC input voltage. The detector control circuit generates a control voltage applied to a control terminal of an electronic switch. When the rectified AC input voltage has a phase angle in a first portion or in a last portion of a half-cycle, the electronic switch conducts to connect a capacitor to the ZCD input of the PFC IC. The capacitor causes the fall time of the trailing edge of a pulse applied to the ZCD input to increase, which causes the off time of the driver output of the PFC IC to increase.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: April 14, 2020
    Assignee: Universal Lighting Technologies, Inc.
    Inventors: Wei Xiong, Dane Sutherland
  • Patent number: 10622933
    Abstract: An inverter device that includes an inverter circuit that converts power between DC power and multi-phase AC power; a drive circuit that transfers a drive signal to each of a plurality of switching elements that form the inverter circuit to cause a switching element of the plurality of switching elements to perform turn-on, in which the switching element is caused to transition from an off state to an on state, and turn-off, in which the switching element is caused to transition from the on state to the off state; and a current detection circuit that detects a current that flows through each of the plurality of switching elements.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: April 14, 2020
    Assignee: AISIN AW CO., LTD.
    Inventors: Shinsuke Tsubamoto, Isamu Kato
  • Patent number: 10622912
    Abstract: A rectifier device includes a first transistor having a load current path and a diode connected in parallel to the load current path between an anode terminal and a cathode terminal. An alternating input voltage is operably applied between the anode terminal and the cathode terminal. A control circuit is coupled to a gate terminal of the first transistor and configured to switch the first transistor on for an on-time period, during which the diode is forward biased. A clamping circuit is coupled to the gate terminal of the first transistor and configured to at least partly switch on the first transistor while the diode is reverse biased and when the level of the alternating input voltage reaches a clamping voltage. The clamping circuit includes an additional circuit coupled between the cathode terminal and the gate terminal and configured to provide a voltage dependent on a load current.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: April 14, 2020
    Assignee: Infineon Technologies AG
    Inventors: Albino Pidutti, Damiano Gadler, Ioannis Pachnis
  • Patent number: 10622879
    Abstract: A control module for a flyback power converting device is coupled between a primary side winding of the flyback power converting device and a power end and includes a switch unit coupled to the primary side winding; wherein the control module conducts a connection between the primary side winding and the power end when the switch unit is disconnected; wherein the power end is able to provide an operation current to the control module.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: April 14, 2020
    Assignee: Infinno Technology Corp.
    Inventor: Yuan-Kai Cheng
  • Patent number: 10622906
    Abstract: A power conversion apparatus (10) includes a plurality of power conversion units (12) each having a function of converting an input direct current voltage to a different direct current voltage, and a control unit (15) that controls the plurality of power conversion units (12) in accordance with a target value Vaim for the sum of voltages output from the plurality of power conversion units (12). When making one or more of the power conversion units (12) output a first voltage which is fixed and making a different one of the power conversion units (12) output a second voltage which is adjusted in accordance with the target value Vaim, the control unit (15) repeatedly switches a power conversion unit (12) to output the second voltage at least between two of the power conversion units (12).
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: April 14, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroyuki Osuga, Takayuki Hidaka, Takashi Miyamoto, Tomokazu Sakashita, Satoshi Ojika
  • Patent number: 10615702
    Abstract: A control method of a power converter including a first stage converter and a second stage converter is provided. The first stage converter converts an input voltage into an intermediate voltage. The second stage converter converts the intermediate voltage into an output voltage to power a load. If a loading amount of the load is larger than a first threshold value, the intermediate voltage is adjusted to increase a voltage difference between the intermediate voltage and the output voltage, so that a change of the intermediate voltage is in a negative correlation with a change of the loading amount. If the loading amount is smaller than a second threshold value, the intermediate voltage remains be unchanged or the intermediate voltage is adjusted, so that the change of the intermediate voltage is in positive correlation with the change of the loading amount.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: April 7, 2020
    Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Yu Zhang, Haoyi Ye, Jianhong Zeng
  • Patent number: 10615680
    Abstract: In a control apparatus for a power converter, a current obtainer obtains a current flowing through an inductor as an inductor current, and a voltage obtainer obtains an alternating-current voltage. A slope compensation unit generates, based on the alternating-current voltage obtained by the voltage obtainer, a slope compensation signal having a slope that depends on the alternating-current voltage, and adds the slope compensation signal to the inductor current obtained by the current obtainer. A current controller controls on-off switching operations of a switch in a peak current mode to thereby cause the inductor current, to which the slope compensation signal has been added, to follow a sinusoidal command current that depends on the alternating-current voltage.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: April 7, 2020
    Assignee: DENSO CORPORATION
    Inventors: Seiji Iyasu, Yuji Hayashi, Yuichi Handa
  • Patent number: 10615713
    Abstract: An improved AC to DC conversion system consists of an electronic switch employed to disconnect the input of a prior art series voltage regulator circuit from a rectified AC mains power supply over a fraction of the period of the AC mains to reduce the power dissipated within the series regulator.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: April 7, 2020
    Inventors: Mark Telefus, Bradley Larson
  • Patent number: 10615689
    Abstract: A system for compensating a voltage line drop includes a shelving unit comprising at least one receiving port, wherein the at least one receiving port includes a connector. The system also includes a power converter operable to generate a line drop compensated output voltage, and a bypass module physically coupled between the connector and the power converter, wherein the bypass module is operable to selectively switch between providing the line drop compensated output voltage from the power converter to a load and bypassing the power converter to provide an uncompensated output voltage to the load.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: April 7, 2020
    Assignee: ABB SCHWEIZ AG
    Inventor: Brandon Michael Kamphaus
  • Patent number: 10606294
    Abstract: A low dropout voltage regulator, coupled to a load circuit receiving a clock signal, includes an amplifier; a power transistor comprising a control terminal, coupled to an output terminal of the amplifier; and a first terminal, coupled to a positive input terminal of the amplifier and the load circuit; and a control circuit, configured to control a current flowing through the power transistor in response to the clock signal.
    Type: Grant
    Filed: January 6, 2019
    Date of Patent: March 31, 2020
    Assignee: NOVATEK Microelectronics Corp.
    Inventors: Liang-Ting Kuo, Mu-Jung Chen, Chi-Chun Liao
  • Patent number: 10608521
    Abstract: A passive circuit includes a first inductance unit, a second inductance unit, a third inductance unit, and a fourth inductance unit which are coupled to each other, and a capacitance unit. A first end of the first inductance unit is coupled to a first end of the second inductance unit, and a second end of the first inductance unit is coupled to a first end of the third inductance unit. A second end of the second inductance unit is coupled to a first end of the fourth inductance unit. A second end of the third inductance unit and a second end of the fourth inductance unit are respectively coupled to the capacitance unit.
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: March 31, 2020
    Assignee: DELTA ELECTRONICS, INC.
    Inventor: Yang-Lin Chen
  • Patent number: 10601340
    Abstract: An electrical configuration contains at least one submodule which has a first and a second outer electrical terminal. The configuration further has a bypass switching device, which is electrically connected between the first and second terminals and in the on-state causes an electrical short-circuit in at least one current flow direction between the two outer terminals. The bypass switching device has a thyristor with an anode terminal, a cathode terminal and a trigger terminal and is connected by its anode terminal to one of the two outer terminals and by its cathode terminal to the other of the two outer terminals. A triggering device is connected to the trigger terminal of the thyristor for triggering the thyristor, and a switch is provided which in the on-state connects the anode terminal of the thyristor to the trigger terminal of the thyristor.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: March 24, 2020
    Assignee: Siemens Aktiengesellschaft
    Inventors: Joerg Dorn, Daniel Schmitt, Frank Schremmer, Marcus Wahle, Felix Hacker