By Pulse Modulation Technique (e.g., Pwm, Ppm, Etc.) Patents (Class 363/41)
  • Patent number: 11525346
    Abstract: A method of improving natural gas recovery from a subterranean hydrocarbon reservoir includes at least one renewable energy source that is electrically coupled with a heat conducting element. The heat conducting element is positioned in a perforated section of a wellbore that traverses into the subterranean hydrocarbon reservoir. A temperature of the subterranean hydrocarbon reservoir is maintained above a cricondentherm temperature so that liquid condensation may be prevented at a final production time. In order to maintain the temperature within a required temperature range, an internal temperature, an internal pressure, and a set of reservoir properties are monitored and then utilized to plot a phase diagram that can be used to detect liquid condensation. If liquid condensation is detected, an electrical output of the renewable energy source is adjusted in order to control the temperature of the subterranean hydrocarbon reservoir at a producing end of a production tubing.
    Type: Grant
    Filed: August 13, 2021
    Date of Patent: December 13, 2022
    Assignee: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
    Inventors: Saad Al Afnan, Murtada Al Jawad, Fahad Al-Ismail, Abdulaziz Al Majed
  • Patent number: 11522528
    Abstract: This application relates to methods and apparatus for voltage control, and in particular to maintain safe voltages for components of audio driving circuits that are operable in a high voltage mode. An audio driving circuit (100) may include a power supply module (106) and may be operable such that, in use, a voltage magnitude at a source terminal of at least a first transistor (306, 309, 603, 605) of the audio driving circuit can exceed its gate-source voltage tolerance. A voltage generator (111 P) is configured to output a first intermediate voltage (VSAFEP) to an intermediate voltage path for use as a gate control voltage for at least the first transistor, to maintain its gate-source voltage below tolerance. An intermediate path voltage clamp (114P) is provided for selectively clamping the intermediate voltage path to a voltage level, so as to maintain the magnitude of the gate-source voltage of the first transistor below tolerance.
    Type: Grant
    Filed: November 2, 2020
    Date of Patent: December 6, 2022
    Assignee: Cirrus Logic, Inc.
    Inventors: Gary Robertson, Hamed Sadati, Rupesh Khare, Sameer Baveja
  • Patent number: 11509252
    Abstract: A method for controlling a variable speed drive supplying power to an electric motor, the variable speed drive comprising a plurality of at least Ni low-voltage power cells connected in series, comprising: upon reception of a speed command, determining a number Mi of cells sufficient to supply power to the motor at a target voltage V that is determined based on the speed command; and activating the Mi power cells from among the Ni power cells, and deactivating the Ni-Mi other power cells in order to supply power to the motor in accordance with the speed command.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: November 22, 2022
    Assignee: Schneider Toshiba Inverter Europe SAS
    Inventors: Emmanuel Frappe, François Malrait, Thomas Devos
  • Patent number: 11506035
    Abstract: A method of improving natural gas recovery from a subterranean hydrocarbon reservoir includes at least one renewable energy source that is electrically coupled with a heat conducting element. The heat conducting element is positioned in a perforated section of a wellbore that traverses into the subterranean hydrocarbon reservoir. A temperature of the subterranean hydrocarbon reservoir is maintained above a cricondentherm temperature so that liquid condensation may be prevented at a final production time. In order to maintain the temperature within a required temperature range, an internal temperature, an internal pressure, and a set of reservoir properties are monitored and then utilized to plot a phase diagram that can be used to detect liquid condensation. If liquid condensation is detected, an electrical output of the renewable energy source is adjusted in order to control the temperature of the subterranean hydrocarbon reservoir at a producing end of a production tubing.
    Type: Grant
    Filed: August 13, 2021
    Date of Patent: November 22, 2022
    Assignee: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
    Inventors: Saad Al Afnan, Murtada Al Jawad, Fahad Al-Ismail, Abdulaziz Al Majed
  • Patent number: 11489474
    Abstract: In a driving device for a rotating electric machine, a first inverter unit blocks and allows, for each winding of multi-phase windings of the rotating electric machine, current conduction on one side of the winding and a second inverter unit blocks and allows current conduction on the other side of the winding. A plurality of second switching elements forming the second inverter unit each have a lower ON resistance than a plurality of first switching elements forming the first inverter unit. A controller is configured to switch on and off the respective first switching elements at a switching frequency higher than an electric fundamental frequency and switch on and off the respective second switching elements at a switching frequency lower than the switching frequency at which to switch on and off the first switching elements.
    Type: Grant
    Filed: May 3, 2021
    Date of Patent: November 1, 2022
    Assignee: DENSO CORPORATION
    Inventors: Hirofumi Kinjo, Makoto Taniguchi
  • Patent number: 11444618
    Abstract: An electrical system includes a motor and a plurality of switch pairs, each switch pair having a high-side switch, a low-side switch, and a switch node coupled to the motor. The electrical system also includes gate driver circuitry coupled to each switch of the plurality of switch pairs. The electrical system also includes a controller coupled to the gate driver circuitry. The controller is configured to direct the gate driver circuitry to provide a first set of gate drive signals together with (i.e., overlapping pulses) a second set of gate drive signals, wherein the first set of gate drive signals is phase-shifted relative to the second set of gate drive signals.
    Type: Grant
    Filed: December 9, 2019
    Date of Patent: September 13, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Manu Balakrishnan
  • Patent number: 11437911
    Abstract: A controller for a power converter comprising a drive signal generator and drive strength control and a variable strength multi-stage gate driver. The drive signal generator and drive strength control outputs a drive signal to control switching of a power switch and a strength signal to control drive strength of the power switch. The variable strength multi-stage gate driver is configured to turn ON the power switch in response to the drive signal with a first drive strength then a second drive strength when the strength signal is not asserted. The variable strength multi-stage gate driver is configured to turn ON the power switch in response to the drive signal with a third drive strength then the second drive strength when the strength signal is asserted. The second drive strength is stronger than the first drive strength and the first drive strength is stronger than the third drive strength.
    Type: Grant
    Filed: December 22, 2020
    Date of Patent: September 6, 2022
    Assignee: Power Integrations, Inc.
    Inventor: Rajko Duvnjak
  • Patent number: 11424971
    Abstract: A control unit generates pulse width modulation (PWM) pulses for an inverter. The control unit has a noise reducer configured to generate an opposing signal for active noise reduction. The noise reducer is configured to set a phase angle of the opposing signal based upon a predefined PWM frequency.
    Type: Grant
    Filed: June 30, 2021
    Date of Patent: August 23, 2022
    Assignee: Dr. Ing. h.c. F. Porsche Aktiengesellschaft
    Inventors: Robert Nelles, Jan Naegelkraemer
  • Patent number: 11424693
    Abstract: A three-level power conversion device includes a three-level converter and a three-level inverter. When the voltage unbalance at a neutral point of the three levels between a + side voltage and a ? side voltage is greater than or equal to a threshold value, the three-level power conversion device changes the pulse width of a gate pulse at a specific timing of a gate pulse signal for operating a switching element of the three-level converter. The three-level power conversion device performs control so that the voltage at the neutral point approaches zero.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: August 23, 2022
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventor: Makoto Hayashi
  • Patent number: 11394317
    Abstract: A converter network bridge controller for a power converter hardware being connectable to an alternating current electricity network is provided. The controller includes an output unit configured for generating a quadrature voltage component reference to a PWM modulator which determines the switching of the power converter hardware, wherein the quadrature voltage component reference includes a first signal and a second signal. The output unit includes a first part and a second part. The first part is configured for generating the first signal based on a current reference for an active current to be generated by the power converter hardware. The second part is configured for providing the second signal to reduce a difference between a converter active current component of measured feedback current and the current reference for active current.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: July 19, 2022
    Assignee: SIEMENS GAMESA RENEWABLE ENERGY A/S
    Inventors: Paul Brian Brogan, Thyge Knueppel, Andrew Roscoe, Douglas Elliott
  • Patent number: 11374485
    Abstract: A filter unit is intended to be connected between an inverter and an electric motor. The filter unit includes: a number of phase connections for connecting to corresponding phase connections of the inverter; a first DC link connection for connecting to a first DC link connection on the inverter and a second DC link connection for connecting to a second DC link connection on the inverter; a number of motor connections for connecting to corresponding connections on the electric motor; a number of filter elements for reducing a rate of voltage rise at the motor connections of the filter unit, filter element is connected between corresponding phase connections of the filter unit and corresponding motor connections of the filter unit; and a coupling unit, which couples the filter elements capacitively with the first DC link connection and the second DC link connection of the filter unit.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: June 28, 2022
    Assignee: Schmidhauser AG
    Inventor: Dirk Schekulin
  • Patent number: 11366163
    Abstract: The present invention relates to a solid testing platform and method for function testing of an intelligent phase-change switch. The testing platform includes a primary controller, a first module, a second module, a capacitor C, an intelligent phase-change switch, and a transformer. The primary controller is respectively connected to the first module and the second module, and is configured to control the operation of the first module and the second module. The first module and the second module are connected in parallel to the capacitor C. the first module is configured to feed back excess energy of the capacitor C to a distribution network. The second module is configured to control magnitude and direction of a current that flows through the intelligent phase-change switch. The capacitor C is configured to perform energy support, filtering, and smoothing.
    Type: Grant
    Filed: November 13, 2020
    Date of Patent: June 21, 2022
    Assignee: LINCANG POWER SUPPLY BUREAU YUNNAN POWER GRID CO., LTD.
    Inventors: Wen Li, Huan Chen, Hongwen Liu, Jisheng Huang, Jindong Yang, Kang Yao
  • Patent number: 11362582
    Abstract: A desired OFF period module is configured to determine a desired OFF period for a plurality of switches of a PFC circuit based on an input voltage and an output voltage. A blanking timer module is configured to output a blanking signal, set the blanking signal to a first state when a countdown timer is greater than zero, and set the blanking signal to a second state when the countdown timer reaches zero. A switching control module is configured to: transition a first switch of the plurality of switches from an ON state to an OFF state in response to (i) a measured current through an inductor of the PFC circuit being greater than a demanded current through the inductor and (ii) the blanking signal being in the second state; and maintain the first switch in the OFF state for the desired OFF period after the transition.
    Type: Grant
    Filed: July 24, 2020
    Date of Patent: June 14, 2022
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Charles E. Green, Paul Rancuret
  • Patent number: 11361644
    Abstract: An electronic device includes a driver circuit embodied on an IC chip. The driver circuit includes a threshold voltage selection circuit that is coupled to receive a horn comparator threshold setting and to use the horn comparator threshold setting to provide a horn comparator threshold voltage. The driver circuit also includes a comparator that has a non-inverting input coupled to a first pin and an inverting input coupled to receive the horn comparator threshold voltage.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: June 14, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Narayanan Seetharaman, Grant Evan Falkenburg
  • Patent number: 11356032
    Abstract: A method for operating switching elements of a multilevel energy converter using at least three electric potentials and to which a multiphase electrical machine is connected. Switching elements of the multilevel energy converter are operated in a predefined clock mode by corresponding switching signals. The switching signals for the switching elements are each assigned to one of the phases and are determined in accordance with each desired voltage signal, in order to apply a phase voltage to each phase of the multiphase electrical machine. The switching signals are determined additionally in accordance with a predefined overlaying voltage signal such that an overlaying voltage dependent on the overlaying voltage signal is overlaid onto each phase voltage.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: June 7, 2022
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Ludwig Kraus
  • Patent number: 11349410
    Abstract: A series multiplex inverter includes a power conversion unit, a phase difference selection unit, a drive signal generation unit, and a drive signal output unit. The phase difference selection unit selects, from among a plurality of phase difference candidates, the phase difference between rectangular wave voltages from a plurality of single-phase inverters. The drive signal generation unit generates a plurality of drive signals that causes the different single-phase inverters to output a plurality of rectangular wave voltages sequentially out of phase by the phase difference selected by the phase difference selection unit. The drive signal output unit outputs the plurality of drive signals generated by the drive signal generation unit to the plurality of single-phase inverters.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: May 31, 2022
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kazufumi Tanaka, Kazutoshi Kurahashi, Yoshiaki Yamamoto, Shuta Ishikawa
  • Patent number: 11342876
    Abstract: A system and method for operating a drive system coupleable to one or more DC and AC electrical ports is disclosed. The drive system includes a DC link, at least one DC-DC converter, at least one DC-AC converter, a DC link capacitor, and a control system configured to control operation of one or more of the at least one DC-DC converter and the at least one DC-AC converter relative to one another based on operational parameters thereof. In controlling operation of one or more of the at least one DC-DC converter and the at least one DC-AC converter, the control system controls at least one of a switching frequency of the at least one DC-DC converter, a switching frequency of the at least one DC-AC converter, a DC-DC converter carrier signal phase, a DC-AC converter carrier signal phase, and a duty cycle of the at least one DC-DC converter.
    Type: Grant
    Filed: August 9, 2019
    Date of Patent: May 24, 2022
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Nidhishri Tapadia, Kum-Kang Huh
  • Patent number: 11283285
    Abstract: Examples of the disclosure include an uninterruptible power supply comprising an input configured to be coupled to a power source, an output configured to output power to a load, a main controller, a main logic power supply, an auxiliary logic power supply, and an auxiliary controller configured to receive power from the auxiliary logic power supply, the auxiliary controller being configured to receive a signal indicating that the load is not powered by the uninterruptible power supply, output a first signal to initiate shutdown of the main controller and the main logic power supply, and output a second signal to power-up the main controller and the main logic power supply after a predetermined period of time elapses after outputting the first signal.
    Type: Grant
    Filed: December 3, 2020
    Date of Patent: March 22, 2022
    Assignee: SCHNEIDE ELECTRIC IT CORPORATION
    Inventors: Pradeep Tolakanahalli Nagabhushanrao, Pavan Kumar Gudipalli, Nagaraju Ingurthi
  • Patent number: 11277077
    Abstract: A power conversion device includes: a three-phase inverter including a plurality of switching elements; and a controller configured to PWM-control the three-phase inverter based on three phase voltage commands. The controller generates a zero-phase voltage command using a two-phase modulation scheme and a third harmonic component of the three phase voltage commands. The controller adds the generated zero-phase voltage command to each of the three phase voltage commands to thereby correct each of the three phase voltage commands. The controller compares each of the corrected three phase voltage commands with a carrier wave, to thereby generate a control signal for controlling switching of the plurality of switching elements.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: March 15, 2022
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventor: Tomohiro Tanaka
  • Patent number: 11177658
    Abstract: A method to reduce harmonics in the electrical output (i.e. voltage and current) of a power plant is provided. The power plant is connected via a point of common coupling with an electrical grid. Converters of the power plant provide respective electrical converter output by an applied pulse-width modulation scheme, which is used in the respective converter. The electrical output of the respective converters is summed to generate the electrical output of the power plant. The electrical output of the power plant is provided via the point of common coupling to the electrical grid. Carrier sideband harmonics, which are generated by the converters, are measured in the electrical output of the power plant. A carrier signal of at least one selected converter is adjusted in its phase until specified and characteristic harmonics in the electrical output of the power plant are reduced below a given threshold.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: November 16, 2021
    Inventors: Emerson Guest, Kim Hoej Jensen, Lei Shuai
  • Patent number: 11139730
    Abstract: A switching period in a burst cycle includes three pulses, that is to say, a start pulse that turns on a low-side switching element, a main pulse that turns on a high-side switching element, and an end pulse that turns on the low-side switching element. A burst stop period corresponding to the magnitude of a load is set during a switching stop period. When the burst cycle approaches a cycle corresponding to a frequency close to the upper limit of the audible frequencies, a second off-threshold voltage of the main pulse is made equal to a first off-threshold voltage of the start pulse to narrow the on-width of the main pulse. By doing so, energy transmitted to the secondary side of a transformer is reduced and the burst cycle is shortened.
    Type: Grant
    Filed: January 31, 2020
    Date of Patent: October 5, 2021
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Koji Murata, Jian Chen
  • Patent number: 11128144
    Abstract: A grid access current control method without current sensor applicable to a grid-connected inverter relates to a system including a main circuit of the grid-connected inverter and a control circuit of the grid-connected inverter. The control circuit of the grid-connected inverter includes a grid access current open-loop control module and a PWM generation module; the grid access current open-loop control module includes a first proportional regulator, a second proportional regulator, a delayer, and an adder; input ends of the first proportional regulator and the second proportional regulator each are led out as an input end of a grid access current reference signal; and an output end of the first proportional regulator is connected to an input end of the adder; an output end of the second proportional regulator is connected to an input end of the delayer.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: September 21, 2021
    Assignee: SOUTHEAST UNIVERSITY
    Inventors: Huafeng Xiao, Zheng Wang, Ming Cheng
  • Patent number: 11090106
    Abstract: A controller for an electrosurgical generator includes an RF inverter, a signal processor, a software compensator, a hardware compensator, and an RF inverter controller. The RF inverter generates an electrosurgical waveform and the signal processor outputs a measured value of at least one of a voltage, a current, or power of the electrosurgical waveform. The software compensator generates a desired value for at least one of the voltage, the current, or the power of the electrosurgical waveform, and the hardware compensator generates a phase shift based on the measured value and the desired value. The RF inverter controller generates a pulse-width modulation (PWM) signal based on the phase shift to control the RF inverter.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: August 17, 2021
    Assignee: Covidien LP
    Inventors: Robert H. Wham, Donald L. Tonn, Aaron Mattmiller, William D. Faulkner, Edward L. Brannan, Mark A. Johnston
  • Patent number: 11088633
    Abstract: The present invention relates to a method for controlling a distortion spectrum that arises for a switch-based inverter (306), which modulates at least one output variable, by virtue of space vector modulation, characterized in that different switch positions (312) causing a modulation of the at least one output variable which approximates to a predefined reference signal (310), are ascertained for each chronologically sequential switching process, a respective distortion spectrum for differences between the reference signal (310) and the at least one output variable that would arise from a respective realization of these different switch positions (312) is calculated, and the switch position (314) for which the associated distortion spectrum is most suitable according to predetermined properties is selected and implemented in the inverter (306). Further provided are a corresponding system and a corresponding modulator.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: August 10, 2021
    Inventors: Stefan Goetz, Christian Korte
  • Patent number: 11056906
    Abstract: An integrated power supply system includes a grid power source, at least one renewable power source, a rechargeable battery assembly, a DC bus, a bi-directional AC-to-DC converter, at least one first DC-to-DC converter, a bi-directional DC-to-DC converter, and a controller. The bi-directional AC-to-DC converter is coupled to the grid power source and the DC bus. The at least one first DC-to-DC converter is coupled to the at least one renewable power source and the DC bus. The bi-directional DC-to-DC converter is coupled to the rechargeable battery assembly and the DC bus. The controller controls power electricity feeding into and being drawn from the DC bus, thereby keeping a bus voltage of the DC bus substantially fixed at a system voltage.
    Type: Grant
    Filed: June 21, 2018
    Date of Patent: July 6, 2021
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Yu-Ming Chang, Sheng-Hua Li
  • Patent number: 10998814
    Abstract: A power conversion system, a controller for the same, and a method for controlling the same. The power conversion system includes a shutdown array and a power converter. The shutdown array includes multiple shutdown strings that are connected in parallel. Each of the multiple shutdown strings includes multiple shutdown devices, where outputs of the multiple shutdown devices are connected in series. An output terminal of the shutdown array is connected to an input terminal of the power converter. An input terminal of each of the multiple shutdown devices is connected to at least one direct-current power supply. The controller sends a shutdown instruction to each shutdown device of the shutdown array in response to receiving a rapid-shutdown command, controls the power converter to discharge an input capacitor of the power converter, and stops discharging the input capacitor in response to an input voltage of the power converter being reduced to a preset voltage.
    Type: Grant
    Filed: February 21, 2020
    Date of Patent: May 4, 2021
    Assignee: SUNGROW POWER SUPPLY CO., LTD.
    Inventors: Zongjun Yang, Hua Ni, Xiaoxun Li, Haifeng Yang
  • Patent number: 10992218
    Abstract: A harmonic suppression device includes a power converter that generates a harmonic suppression current that is an electric current for suppressing a harmonic current flowing in a power line and outputs the generated harmonic suppression current to the power line, a communication unit that exchanges signals with other harmonic suppression devices, and a controller that controls the power converter based on a signal received by the communication unit.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: April 27, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kenji Iwazaki, Koichi Arisawa
  • Patent number: 10953751
    Abstract: A vehicle-side circuit for supplying power in an electrically driven vehicle is provided. The power circuit includes an external AC voltage terminal; at least one DC/AC converter having an AC voltage side; and an electrical machine having a plurality of windings, each of which has a first tapping. The electrical machine is connected to the AC voltage side of the DC/AC converter. A switching device is connected to the plurality of windings and to a signal shaping filter having a plurality of first capacitors. The signal shaping filter is connected between the DC/AC converter and an external AC terminal. The switching device may interconnect the windings within the electrical machine or may connect the first tappings of the plurality of windings within the signal shaping filter to the plurality of first capacitors to form an at least third-order low-pass filter.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: March 23, 2021
    Assignee: Vitesco Technologies GmbH
    Inventors: Franz Pfeilschifter, Martin Brüll, Wilhelm Hackmann, Klaus Mühlbauer, Martin Spornraft, Matthias Töns
  • Patent number: 10944326
    Abstract: A method for autonomous systems comprising the steps of using a feedback circuit to provide power to an autonomous system, wherein the feedback circuit is configured to alternate between a first and second sources of power depending on availability of power; creating a delay in the circuit by electrically coupling the circuit to a comparator, a one-shot signal, and a low pass filter, wherein the delay is configured to last for a specified amount of time, and wherein the delay will prevent the power from uncontrolled back and forth oscillation between the first and second power sources.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: March 9, 2021
    Assignee: United States of America as represented by the Secretary of the Navy
    Inventors: Alex G. Phipps, Everly Yeo, Victor Saucedo, Frank Alonge, Rennie Andrews
  • Patent number: 10938296
    Abstract: Techniques are described for ripple detection and cancellation in switching voltage regulator circuits. For example, in a switching voltage converter, a voltage is up-converted or down-converted by switching high side and low side switches and passed through a low-pass filter for averaging. While the act of switching can result in conversion of the voltage with good efficiency, it also typically generates ripples on the output voltage, which can be undesirable in some applications. Embodiments use the switching voltage, the output voltage, and a feed-forward loop to generate a current cancellation signal to have particular gain, timing, and polarity that effectively emulates the complement of the inductor ripple current. The cancellation current signal can be injected into the output node, such that the cancellation current signal sums with the inductor ripple current at the output node, thereby at least partially cancelling the effect of the inductor ripple current.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: March 2, 2021
    Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.
    Inventors: Siavash Yazdi, Ahmed Emira
  • Patent number: 10923906
    Abstract: A fault switch configuration and clearing method in a flexible DC converter station, the flexible DC converter station is configured with a grid side switch and a valve side phase-split switch in the converter station. When a fault occurs, a faulty phase and a non-faulty phase are detected and identified by means of differential protection or low voltage overcurrent. An alternating current zero crossing condition is created by means of firstly turn off the non-faulty phase valve side phase-split switch and the grid side switch, thereby cutting off the faulty phase, disconnecting the connection between a power supply and a fault point, and achieving the clearing for faults. The described fault-clearing method is simple and practical, highly reliable, and connection between the fault point and the power supply is quickly and effectively cut; converter station equipment is effectively protected, and further expansion of the fault is avoided.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: February 16, 2021
    Assignees: NR ELECTRIC CO., LTD., NR ENGINEERING CO., LTD.
    Inventors: Yu Lu, Gang Li, Jie Tian, Nannan Wang, Haiying Li, Chongxue Jiang, Shunke Sui
  • Patent number: 10910955
    Abstract: The present disclosure provides a single carrier based multilevel modulation method, a single carrier based multilevel modulation device, and a storage medium. In each control period, a modulated wave value corresponding to each of n switch pairs is obtained according to a reference voltage to obtain n modulated wave values, a triangular carrier having an amplitude of n is generated and compared with each of the n modulated wave values to obtain control signals for each of the n switch pairs, and for each phase, the control signals are input to the corresponding switch pairs of the phase bridge.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: February 2, 2021
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Kui Wang, Zedong Zheng, Yongdong Li
  • Patent number: 10826401
    Abstract: Input AC voltage sensing for a flyback circuit. The flyback circuit is configured as “primary-high”, namely a primary switch of the flyback circuit is positioned “high” to receive an input AC voltage through a first rectifying circuit. A primary winding of the flyback circuit is coupled to a primary ground reference. A voltage sensing circuit has a processing circuit and a first sensing resistor. The processing circuit has a first terminal coupled to the input AC source through a second rectifying circuit, a second terminal coupled to the primary ground reference and an output terminal. The processing circuit subtracts a voltage at the second terminal from a voltage at the first terminal to obtain a differential voltage, which is then sampled and held as an input AC voltage sensing signal.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: November 3, 2020
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: Siran Wang
  • Patent number: 10756641
    Abstract: A switch mode power supply and method for operating the power supply and to the use of the same, wherein the switch mode power supply comprises a control for controlling a control element and is connected to a DC link of the converter, the switch mode power supply comprises a startup-delay such that control of the switch element is blocked until a predetermined start delay duration (T) has lapsed, where the start delay duration (T) is longer than the time span between DC link charging.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: August 25, 2020
    Assignee: Siemens Aktiengesellschaft
    Inventors: Daniel Portisch, Hans Drescher
  • Patent number: 10714936
    Abstract: A system interconnecting facility is connected to a power system, and includes a plurality of power converters connected to the power system, a plurality of transformers provided between the power system and the power converters, a plurality of switches provided between the transformers and the power converters, and a controller that controls the opening and closing of the switch. The controller outputs, to the switches, open and close commands in so that the number of closed switches is out of a closed switch number range where a harmonic voltage of the system interconnecting facility increases, based on a harmonic voltage containing rate characteristic that is a relation between the number of closed switches and a harmonic voltage containing rate of the system interconnecting facility. The system interconnecting facility is capable of suppressing a harmonic voltage even if a circuit structure differs depending on a situation.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: July 14, 2020
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Energy Systems & Solutions Corporation
    Inventors: Masayuki Kubota, Tsutomu Tanno, Mami Mizutani, Shinya Naoi, Masako Kiuchi, Midori Otsuki, Kazuyoshi Shimada
  • Patent number: 10715065
    Abstract: A wind power generation system including a doubly fed induction generator (DFIG) of a wind turbine is presented. The DFIG includes a rotor and a stator, a rotor-side conversion unit coupled to the rotor, a direct current (DC) link, and at least one line-side conversion unit coupled to the rotor-side conversion unit via the DC link and coupled to the stator of the DFIG. The at least one line-side conversion unit includes exactly one first converter, high frequency transformers, and second converters, where each of the second converters is coupled to the first converter via a respective high frequency transformer, and inverters, where each of the inverters is coupled to a respective second converter and includes an alternative current (AC) phase terminal.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: July 14, 2020
    Assignee: General Electric Company
    Inventors: Kapil Jha, Arvind Kumar Tiwari, Saurabh Shukla, Olive Ray
  • Patent number: 10715034
    Abstract: Apparatus and system for powering an isolated gate driver. In one embodiment, the apparatus comprises a gate driver power supply unit (PSU), coupled to a transistor and to an isolated gate driver that couples control signals to the transistor, for (i) harnessing energy from commutation action across the transistor, and (ii) using the harnessed energy to power the isolated gate driver.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: July 14, 2020
    Assignee: Enphase Energy, Inc.
    Inventor: Michael J. Harrison
  • Patent number: 10692675
    Abstract: The disclosure relates to a contactor having electronic coil control for a magnet coil, the operation of keeping the pull-in power of the magnet coil constant being formed by current clocking, and having a safety-related output assembly of a programmable logic controller for the fault diagnosis of the contactor, the safety-related output assembly determining the flow of current flowing into the contactor and detecting a fault if a limit value is undershot and switching off. In the contactor disclosed herein, a connectable base load is integrated in the contactor.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: June 23, 2020
    Assignee: Siemens Aktiengesellschaft
    Inventors: Christian Oppermann, Bernhard Streich
  • Patent number: 10630204
    Abstract: A network feedback unit feeds electrical energy from a voltage intermediate circuit into a three-phase network. The network feedback unit has: a buck converter unit having first and second buck converters, the first buck and second buck converters being connected in parallel with the input side of each electrically coupled to the voltage intermediate circuit; an inverter, with the input side electrically coupled to an output of the buck converter unit and the output side electrically coupled to the three-phase network; at least one filter capacitor arranged at the output of the buck converter unit or at the output of the inverter; and a controller unit to drive the first and second buck converter depending on a filter capacitor current such that the first and second buck converter contribute in equal parts to an output current of the buck converter unit.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: April 21, 2020
    Assignee: Schmidhauser AG
    Inventors: Christof Schneggenburger, Dirk Schekulin
  • 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: 10608524
    Abstract: Techniques are described for ripple detection and cancellation in switching voltage regulator circuits. For example, in a switching voltage converter, a voltage is up-converted or down-converted by switching high side and low side switches and passed through a low-pass filter for averaging. While the act of switching can result in conversion of the voltage with good efficiency, it also typically generates ripples on the output voltage, which can be undesirable in some applications. Embodiments use the switching voltage, the output voltage, and a feed-forward loop to generate a current cancellation signal to have particular gain, timing, and polarity that effectively emulates the complement of the inductor ripple current. The cancellation current signal can be injected into the output node, such that the cancellation current signal sums with the inductor ripple current at the output node, thereby at least partially cancelling the effect of the inductor ripple current.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: March 31, 2020
    Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.
    Inventors: Siavash Yazdi, Ahmed Emira
  • Patent number: 10582962
    Abstract: A dual-output generator is configured to output two or more waveforms at different frequencies. In particular, the dual-output generator is configured to provide low-frequency output, which may be suitable for ultrasonic surgical instruments, and a high-frequency output, which may be suitable for electrosurgical instruments, while reducing the amplitude of all remaining frequencies other than the two selected low and high frequencies to about zero.
    Type: Grant
    Filed: January 23, 2016
    Date of Patent: March 10, 2020
    Assignee: Covidien LP
    Inventors: Daniel A. Friedrichs, Chongwen Zhao, Bradford C. Trento, Daniel J. Costinett
  • Patent number: 10554113
    Abstract: A control system of a low voltage DC-DC converter is provided. The system includes a low voltage DC-DC converter unit that has a power semiconductor element and converts power supplied from a high voltage battery of a vehicle into power of low voltage. A switching frequency change unit changes a switching frequency of the power semiconductor element and a microcomputer generates a final PWM signal based on an input voltage value input from the high voltage battery and an output voltage value of the switching frequency change unit to apply a maximum duty command voltage to a PWM controller. The PWM controller applies PWM voltage to the power semiconductor element to thus operate the power semiconductor element at less than a maximum duty based on the maximum duty command voltage applied from the microcomputer.
    Type: Grant
    Filed: May 8, 2019
    Date of Patent: February 4, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Jee Heon Kim, Ho Joong Lee, Han Shin Youn, Dong Jun Lee, Hye Seung Kim
  • Patent number: 10530239
    Abstract: A motor controller and methods for operating a motor are described herein. The motor controller includes a high-frequency (HF) inverter having a direct current (DC) input stage and an alternating current (AC) output stage, the HF inverter operable at a switching frequency to generate a three-phase output having a fundamental frequency. The motor controller also includes a differential mode (DM) filter coupled in series with the output stage of the HF inverter and having a resonant frequency less than 10% of the switching frequency, the DM filter configured to reduce harmonic components of the three-phase output and generate a first filtered output. The motor controller further includes a common mode (CM) filter coupled in series with the DM filter, the CM filter configured to filter the first filtered output to generate a second filtered output having a reduced CM voltage to operate the electric motor with a reduced bearing current.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: January 7, 2020
    Assignee: Regal Beloit America, Inc.
    Inventors: Ming Li, Roger Carlos Becerra
  • Patent number: 10528687
    Abstract: Virtual oscillator control systems, devices, and techniques are provided. One example device includes a processor configured to implement a virtual oscillator circuit and output an oscillating waveform based on the virtual oscillator circuit and power electronics operatively coupled to the processor and configured to convert, based on the oscillating waveform, direct current (DC) electricity to alternating current (AC) electricity. The processor may be further configured to extract, from the virtual oscillator circuit, a virtual current based on an output current of the AC electricity, and output the oscillating waveform further based on an input voltage of the DC electricity.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: January 7, 2020
    Assignees: Alliance for Sustainable Energy, LLC, ETH Zürich
    Inventors: Brian Benjamin Johnson, Nathan Ainsworth, Sairaj Vijaykumar Dhople, Mohit Sinha, Florian Anton Dörfler
  • Patent number: 10486536
    Abstract: An electric vehicle control device includes: a main transformer to convert AC voltage input to an input winding thereof from an AC power source, and output converted AC voltage from each of a plurality of output windings; a plurality of converter main circuits, each connected to one of a plurality of secondary windings included in the output windings, to convert AC voltage output from connected secondary windings into DC voltage; and a plurality of converter controllers, each targeting for control one of the converter main circuits, to control by pulse width modulation the control-target converter main circuit, by comparing a signal wave and carrier wave. Each of the converter controllers determines a phase angle correction amount of the signal wave and/or the carrier wave, in response to operating state of a load supplied power through a predetermined output winding among the output windings.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: November 26, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Tetsuo Sugahara
  • Patent number: 10461648
    Abstract: An alternating current step-down circuit comprises an AC input, a DC output, an AC output, a full-bridge rectification and filtering circuit, a flyback step-down circuit, a DC-DC step-down unit and an inverting unit. The AC input is connected with an input of the full-bridge rectification and filtering circuit; an output of the full-bridge rectification and filtering circuit is connected with an input of the flyback step-down circuit and an input of the DC-DC step-down unit, respectively; an output of the flyback step-down circuit is connected with the DC output, the input of the DC-DC step-down unit and an input of the inverting unit, respectively; an output of the DC-DC step-down unit is connected with the input of the inverting unit; and an output of the inverting unit is connected with the AC output.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: October 29, 2019
    Assignee: SHENZHEN SEGRE ELECTRONIC CO., LTD.
    Inventor: Wanglong Xiong
  • Patent number: 10454374
    Abstract: A power supply includes: a power converter that converts an input voltage by switching at a switch and supplies an output voltage and an output current to an output terminal connected to a load; a current detector that detects the output current or a current that changes with the output current and outputs a current detection signal whose voltage value changes with the output current; a signal corrector that inputs and corrects the current detection signal and generates and outputs a corrected current detection signal whose voltage value corresponds to the value of the output current; a matching circuit that inputs the corrected current detection signal and outputs to a balanced terminal; and a controller that inputs the corrected current detection signal and a balanced voltage signal generated at the balanced terminal and controls switching operations of the switch to reduce a difference between the two signals.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: October 22, 2019
    Assignee: TDK CORPORATION
    Inventors: Eiji Takegami, Tomokazu Ikarashi
  • Patent number: 10438530
    Abstract: A display interface circuit includes a first transistor and a second transistor electrically connecting in series between a first motherboard power and a display power. A first body diode of the first transistor has a current direction opposite a second body diode of the second transistor. When a display device powers up but a motherboard powers downs, a first control circuit turns on the first transistor and a second control circuit turns off the second transistor such that a current does not leak from the display power toward the first motherboard power due to the second body diode. When the display device powers down but the motherboard powers up, the first control circuit turns off the first transistor and the second control circuit turns off the second transistor such that the first motherboard power is not outputted to a video display interface due to the first body diode.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: October 8, 2019
    Assignee: Wistron Corporation
    Inventors: Ke Yang, Wei Liang Liao
  • Patent number: 10425032
    Abstract: A system and method for operating a drive system coupleable to one or more DC and AC electrical ports is disclosed. The drive system includes a DC link, at least one DC-DC converter, at least one DC-AC converter, a DC link capacitor, and a control system configured to control operation of one or more of the at least one DC-DC converter and the at least one DC-AC converter relative to one another based on operational parameters thereof. In controlling operation of one or more of the at least one DC-DC converter and the at least one DC-AC converter, the control system controls at least one of a switching frequency of the at least one DC-DC converter, a switching frequency of the at least one DC-AC converter, a DC-DC converter carrier signal phase, a DC-AC converter carrier signal phase, and a duty cycle of the at least one DC-DC converter.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: September 24, 2019
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Nidhishri Tapadia, Kum-Kang Huh