Plural Inverters Patents (Class 363/71)
  • Patent number: 11817813
    Abstract: The present disclosure relates to a wind turbine comprising a wind turbine rotor with a plurality of blades supported on a support structure, a generator operatively coupled to the wind turbine rotor for generating electrical power, a power electronic converter for converting electrical power generated by the generator to a converted AC power of predetermined frequency and voltage, and a main wind turbine transformer having a low voltage side and a high voltage side for transforming the converted AC power to a higher voltage. One or more electric filters are connected to the high voltage side of the main transformer, wherein the electric filters are arranged in the support structure. The present disclosure also relates to wind farms, and particularly offshore wind farms, and to methods for operating wind farms.
    Type: Grant
    Filed: March 31, 2022
    Date of Patent: November 14, 2023
    Assignee: General Electric Renovables Espana, S.L.
    Inventors: Einar V. Larsen, Regis Peron, Javier Cilla Garcia, Vincent Kerbouriou
  • Patent number: 11802897
    Abstract: An insulation impedance detection method includes: An inverter injects a first common-mode voltage into an alternating current side, where the first common-mode voltage is divided by an alternating current grounding insulation impedance of an alternating current cable and a direct current grounding insulation impedance of a photovoltaic unit. The inverter can obtain an impedance value of the alternating current grounding insulation impedance based on the first common-mode voltage, a voltage divided by the alternating current grounding insulation impedance for the first common-mode voltage (a second common-mode voltage on the alternating current grounding insulation impedance), and an impedance value of the direct current grounding insulation impedance. The alternating current grounding insulation impedance is detected by using a necessary device, namely, the inverter in a photovoltaic power generation system.
    Type: Grant
    Filed: February 18, 2022
    Date of Patent: October 31, 2023
    Assignee: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
    Inventor: Hualei Ju
  • Patent number: 11750108
    Abstract: A 15-level multilevel inverter circuit includes an outer circuit, an inner circuit, a polarity changing circuit and a computing device. The outer circuit and the inner circuit include a plurality of DC voltage supplies. Each DC voltage supply has a positive and a negative terminal. The outer circuit, the inner circuit and the polarity changing circuit include a plurality of unidirectional power switches. Each unidirectional power switch is a transistor with a diode connected in parallel to the transistor. The computing device is configured to provide control signals to the gates of the plurality of the unidirectional power switches of the outer circuit and the inner circuit to add or subtract the voltage of each of inner DC voltage supplies to form square waveforms approximating sinusoidal waveforms, and to the gates of the plurality of the unidirectional power switches of the polarity changing circuit to switch the polarity of the voltage.
    Type: Grant
    Filed: December 14, 2020
    Date of Patent: September 5, 2023
    Assignee: King Abdulaziz University
    Inventors: Hussain Bassi, Muhyaddin Rawa
  • Patent number: 11742659
    Abstract: A power system for an electrical system with highly fluctuating loads is powered by one or more power sources that are slow to react to load changes. The power sources are connected to electrical equipment used on the drill rig which provide active load to the generate. One or more load banks may be positioned to provide passive load to the generators to maintain generally constant generator load, while allowing for instant access to power as active load increases. Generators may be run at 100% capacity, a maximum efficient capacity, or at a high enough level to allow for a sufficiently rapid increase in power output. At least one parameter of a drilling operation may be utilized to anticipate load demand changes.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: August 29, 2023
    Assignee: NABORS DRILLING TECHNOLOGIES USA, INC.
    Inventors: Beat Kuttel, Tommy Scarborough, Kevin Williams, Gary Pace, James Garaghty
  • Patent number: 11736034
    Abstract: A power conversion apparatus includes a base having a main surface to which switching elements of each of power converters are fixed, capacitor units, coupling members fixed to some of the capacitor units adjacent to each other, and fitting members fixed to the respective capacitor units and fixed to the base. The capacitor units are disposed along the main surface of the base.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: August 22, 2023
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Takahiro Masuyama
  • Patent number: 11728651
    Abstract: The present disclosure provides systems and methods for optimizing loading of battery inverters. A system may include a plurality of inverters configured to output power to a load; a switching system connected to the plurality of inverters; a plurality of energy storage units selectively coupled to the plurality of energy storage units by the switching system; and a controller. The controller can be configured to determine a required power for the load; determine a number of the plurality of inverters to provide the required power; determine a switching position for the switching system based on the determined number of the plurality of inverters, the switching position corresponding to power delivery by a set of the plurality of inverters; and send a control signal to the switching system to connect one or more of the plurality of energy storage units with the set of the plurality of inverters.
    Type: Grant
    Filed: April 5, 2023
    Date of Patent: August 15, 2023
    Assignee: 8ME NOVA, LLC
    Inventors: Finbar Sheehy, Gautham Ramesh
  • Patent number: 11682982
    Abstract: An inverter subsystem that includes a direct current (DC) bus, a DC terminal, and a power storage interface that is configured to be connected to power storage. The DC terminal is configured to be: (1) connected to the DC bus via an internally-facing side of the DC terminal and (2) connected to a load via an externally-facing side of the DC terminal. The load is powered via the DC terminal.
    Type: Grant
    Filed: September 1, 2022
    Date of Patent: June 20, 2023
    Assignee: Lunar Energy, Inc.
    Inventors: Kevin Richard Fine, Mark Holveck, Conrad Xavier Murphy
  • Patent number: 11674997
    Abstract: A test system is disclosed. The test system includes a programmable switching array including input terminals, output terminals, and an array of programmable switches configured for selectively connecting any one of the input terminals to any one of output terminals; and a current supply device comprising a multiplexed digital bus and a plurality of a power supplies connected in parallel between the multiplexed digital bus and the input terminals of the programmable switching array.
    Type: Grant
    Filed: April 19, 2022
    Date of Patent: June 13, 2023
    Assignee: KEYSIGHT TECHNOLOGIES, INC.
    Inventors: Ken Yawata, Hiroshi Nada
  • Patent number: 11677327
    Abstract: A method and apparatus include a primary transformer coil, a secondary transformer coil, and a center tapped inductor coupled to the secondary transformer coil. A first switch may be in electrical communication with the center tapped inductor and may be configured to affect the first output voltage. A second switch may be in electrical communication with the center tapped inductor and may be configured to affect the second output voltage. In a particular example with an analog current (AC) output voltage, the two output voltages are out of phase to each other. In a direct current (DC) implementation, the transformer may be operated to output a positive and a negative output voltage. The apparatus may function as a resonant converter, or may operate in non-resonant mode. In one implementation, an H bridge may provide reactive power support. An inductor filter may be in electrical communication with the secondary transformer coil.
    Type: Grant
    Filed: September 5, 2019
    Date of Patent: June 13, 2023
    Assignee: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
    Inventor: Qin Huang
  • Patent number: 11671007
    Abstract: A plurality of switching units are provided, and a controller performs control in an antiphase manner to approximately synchronize a rise of a control signal applied to one of the switching units with a fall of a control signal for switching applied to any one of the other switching units and synchronize a fall of the control signal applied to the one of the switching units with a rise of the control signal for switching applied to the any one of the other switching units. When control in an antiphase manner is disabled, control is performed to prevent rises or falls from coinciding with each other between the switching units. Output signals from the switching units are input to rectifiers and are combined by a combiner to become an output signal.
    Type: Grant
    Filed: September 15, 2020
    Date of Patent: June 6, 2023
    Assignee: HITACHI, LTD.
    Inventors: Akio Yamamoto, Wen Li, Ryo Kadoi
  • Patent number: 11658477
    Abstract: A multi-port power converter includes a housing that includes a plurality of ports structured to electrically interface to a plurality of loads, the plurality of loads having distinct electrical characteristics. The multi-port power converter also includes a plurality of solid state components configured to provide selected electrical power outputs and to accept selected electrical power inputs and a plurality of solid state switches configured to provide selected connectivity between the plurality of solid state components and the plurality of ports.
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: May 23, 2023
    Assignee: EATON INTELLIGENT POWER LIMITED
    Inventors: Martin Wayne Mensch, Brandon William Fisher, Robert Stephen Douglass, Austin Robert Zurface, Jeff Howard Urian, James David, Bharath Suda, Asheesh Soni, Karsten Gerving, Guido Vollmar, Gerd Schmitz, Christoph Bausch, Ute Molitor, Lutz Friedrichsen, Kai Schroeder, Julia Otte, Madeline Philipsohn, Norbert Roesner, Volker Lang, Johannes Meissner, Paolo D'Amico, Jalpa Shah, Meng Wang, Damrongrit Piyabongkarn, Niles Stephen Ramseyer, Dennis Dukaric, Matt Haylock, Justin Keith Griffiths
  • Patent number: 11652349
    Abstract: A utility-scale energy storage and conversion system can operate two or more inverter groups such that their reactive power commands are proportional to their available reactive power range. The control system can therefore distribute the reactive power commands in proportion to the available Q range, thereby ensuring that all inverters in the utility-scale energy storage and conversion system 100 operate with the same Q “headroom”. In addition, the utility-scale energy storage and conversion system can use an on-load tap changer (LTC) to adjust a terminal voltage associated with a first group of inverters and a second group of inverters. The first group of inverters can be associated with a first rating and the second group of inverters can be associated with a second rating that is greater than the first rating.
    Type: Grant
    Filed: May 7, 2021
    Date of Patent: May 16, 2023
    Assignee: Mitsubishi Power Americas, Inc.
    Inventors: Rohit Shrikant Kadam, Michael Thomas Leonard, Jovan Z. Bebic
  • Patent number: 11646668
    Abstract: A power converter includes N power conversion units. Each power conversion unit includes a main switching circuit, a transformer, a synchronous rectifier circuit, an input signal terminal and a signal processor. A primary winding of the transformer is connected with the main switching circuit. The synchronous rectifier circuit is connected with a secondary winding of the transformer. The input signal terminal receives a first PWM control signal. The signal processor generates first and second PWM driving signals to drive the main switching circuit according to the first PWM control signal, and a phase difference between the first and second PWM driving signals is (180±?) degree. The signal processor generates third and fourth PWM driving signals to drive the synchronous rectifier circuit according to the first PWM control signal, and a phase difference between the third and fourth PWM driving signals is (180±?) degree.
    Type: Grant
    Filed: September 23, 2021
    Date of Patent: May 9, 2023
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Yahong Xiong, Yang Leng, Junguo Cui, Zhongwang Yang
  • Patent number: 11641167
    Abstract: A transformerless parallel active rectifier system includes N multiphase common mode inductors directly connected to a shared multiphase AC input with no intervening transformer, and N active rectifiers coupled to respective ones of the N multiphase common mode inductors and having respective DC outputs coupled to a shared DC bus, where N is an integer greater than 1. The N active rectifiers have ground current regulators and are synchronized to provide DPWM switching control signals synchronized to one another to regulate their respective ground currents and concurrently regulate the shared DC bus voltage.
    Type: Grant
    Filed: January 14, 2022
    Date of Patent: May 2, 2023
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: James A. Ulrich, Lixiang Wei, Ahmed Mohamed Sayed Ahmed, Nickolay N. Guskov
  • Patent number: 11641110
    Abstract: Apparatus and method for controlling reactive power. In one embodiment, the apparatus comprises a bidirectional power converter comprising a switched mode cycloconverter for generating AC power having a desired amount of a reactive power component.
    Type: Grant
    Filed: January 19, 2022
    Date of Patent: May 2, 2023
    Assignee: Enphase Energy, Inc.
    Inventor: Michael J. Harrison
  • Patent number: 11641190
    Abstract: An oscillator circuit (15) is disclosed. It comprises N amplifier circuits (A1-A4), connected in a ring and has a first and a second supply terminal (s1, s2). Each amplifier circuit (A1-A4) comprises an input transistor (M1) having its gate connected to the input (in) of the amplifier circuit, its drain connected to an internal node (x) of the amplifier circuit, and its source connected to the first supply terminal (si). Furthermore, each amplifier circuit (A1-A4) comprises a first resonance circuit (R1) comprising a first inductor (Ls) and a first capacitor (Cs), wherein the first inductor (Ls) is connected between the internal node (x) and the output (out) of the amplifier circuit, and the first capacitor (Cs) is connected between the output (out) of the amplifier circuit and one of the first and the second supply terminals (s1, s2).
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: May 2, 2023
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Mohammed Abdulaziz, Henrik Sjöland
  • Patent number: 11626791
    Abstract: Systems and methods that facilitate multilevel hysteresis voltage control methods for cascaded multilevel voltage modulators having a plurality of power cells connected in series and has any positive integer number of output voltage levels to control any unipolar voltage on the load of the voltage modulator, and transfer electrical power from an electrical grid via AC/DC converters or directly from energy storage elements of the power cells to that load. A method of operational rotation of the power cells of a multilevel voltage modulator, which ensures an equal power sharing among the power cells and voltage balancing of the energy storage elements of the power cells of the modulator.
    Type: Grant
    Filed: August 23, 2021
    Date of Patent: April 11, 2023
    Assignee: TAE Technologies, Inc.
    Inventor: Mikhail Slepchenkov
  • Patent number: 11603001
    Abstract: Module-based energy systems are provided having multiple converter-source modules. The converter-source modules can each include an energy source and a converter. The systems can further include control circuitry for the modules. The modules can be arranged in various ways to provide single phase AC, multi-phase AC, and/or DC outputs. Each module can be independently monitored and controlled.
    Type: Grant
    Filed: August 11, 2022
    Date of Patent: March 14, 2023
    Assignee: TAE Technologies, Inc.
    Inventors: Mikhail Slepchenkov, Roozbeh Naderi
  • Patent number: 11581730
    Abstract: The power supply device with multiple outputs includes two output ports, a power converting module with two power output ends, and two switching modules connected among the two power output ends and the two output ports. The output power from the two power output ends can be independently allocated to either one or two of the two second output ports. When one of the output ports requests for a demand power, the power supply device is able to determine which one or both of the power output ends to output power to the output port, reaching a better power allocation efficiency.
    Type: Grant
    Filed: April 15, 2021
    Date of Patent: February 14, 2023
    Assignee: ACBEL POLYTECH INC.
    Inventor: Chia-An Yeh
  • Patent number: 11569668
    Abstract: A system for dynamically balancing power in a battery pack during charging and discharging includes a battery pack, a control unit, and a load unit. The battery pack includes one or more modules. Each module includes one or more bricks. Each brick includes one or more blocks connected either in a series configuration or in a parallel configuration. Each block includes one or more cells. The control unit is connected with the battery pack across each of the blocks for processing power from each of the blocks irrespective of a power mismatch between the blocks. The control unit dynamically balances the power in the battery pack by controlling a differential current from a block with higher state of charge (SOC) to a block of lower SOC, using one or more converters and thereby maximizing available energy of the battery pack during charging and discharging.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: January 31, 2023
    Assignee: IGRENENERGI, INC.
    Inventors: Sunit Tyagi, Jitendra Apte, Hemanshu Bhatt, Anupam Hudait, Ranjith Nandakumar, Pooja Sharma, Dipti Kapadia, Rashmi Naroji, Bhavin Shah, Deepthi Keshavan
  • Patent number: 11557899
    Abstract: A method and associated apparatus for feeding electric power from a photovoltaic system via a grid connection point into an AC grid having a low short-circuit power is disclosed. The method includes connecting a DC voltage side of at least one first inverter of the photovoltaic system to a photovoltaic generator and an AC voltage side of the at least one first inverter to the grid connection point, wherein the at least one first inverter is operated as a current source, and connecting an AC voltage side of a second inverter of the photovoltaic system to the grid connection point, wherein the second inverter is operated as a voltage source based on measurement values of an AC voltage measured in the region of the photovoltaic system and a predefined characteristic curve.
    Type: Grant
    Filed: May 13, 2020
    Date of Patent: January 17, 2023
    Assignee: SMA Solar Technology AG
    Inventors: Daniel Premm, Vitali Sakschewski
  • Patent number: 11545833
    Abstract: A high-voltage hierarchy hundred-megawatt level (100 MW) battery energy storage system and optimizing and control methods are provided. The system includes a multi-phase structure, of which each phase is divided into multi-story spaces from top to bottom. A battery module is provided in each story of the multi-story spaces. The battery module is connected to a DC terminal of an H-bridge converter, and each phase is cascaded by the H-bridge converter. A capacity of the single-phase energy storage apparatus of the present invention is large, and multiple phases can be connected in parallel to form a 100 MW battery energy storage power station. The power station has the advantages of simple structure, easy coordinated control, low control loop model and coupling, and optimal system stability. The control system of the present invention has fewer hierarchies, a small information transmission delay, and a rapid response speed.
    Type: Grant
    Filed: August 14, 2020
    Date of Patent: January 3, 2023
    Assignee: SHANGHAI JIAO TONG UNIVERSITY
    Inventors: Xu Cai, Chang Liu, Rui Li, Yunfeng Cao, Xiaolong Cai, Tao Liu
  • Patent number: 11469685
    Abstract: Power conversion systems and methods to control a multiphase multilevel regenerative power converter with multilevel phase circuits that individually include multiple regenerative power stages with respective power stage outputs connected in series, each of the multiple regenerative power stages comprising a DC link circuit a switching rectifier coupled between a respective transformer secondary circuit and the DC link circuit, and a switching inverter coupled between the DC link circuit and the respective power stage output, including a controller that provides inverter switching control signals to control the respective switching inverters, provides rectifier switching control signals to control the respective switching rectifiers, and controls a non-zero phase relationship between the rectifier switching control signals of the respective switching rectifiers.
    Type: Grant
    Filed: December 21, 2020
    Date of Patent: October 11, 2022
    Assignee: ROCKWELL AUTOMATION TECHNOLOGIES, INC.
    Inventors: Zhituo Ni, Mehdi Narimani, Zhongyuan Cheng, Navid R. Zargari
  • Patent number: 11469675
    Abstract: A switching converter has a first converter output for connection to a user load and a second converter output for connection to the user load. A first direct current rail power negative terminal has a first positive output and a first negative output connected to the second converter output. A second direct current rail power negative terminal has a second negative output and a second positive output connected to the first positive output. A first switch has a first positive terminal connected to the first positive output, a first negative terminal and a first control terminal. A second switch has a second positive terminal connected to the first negative terminal, a second negative terminal connected to the second negative output, and a second control terminal. A pulse width modulator has a first modulator output connected to the first control terminal, and a second modulator output connected to the second control terminal.
    Type: Grant
    Filed: May 1, 2021
    Date of Patent: October 11, 2022
    Assignee: Keysight Technologies, Inc.
    Inventors: Peyman Safa, Marko Vulovic
  • Patent number: 11456678
    Abstract: In order to reduce noise current leaking out from a frame to which semiconductor devices constituting a three-level power conversion circuit are attached to the outside of a power conversion device, the frame to which the semiconductor devices constituting the three-level power conversion circuit with which the power conversion device is equipped are attached is configured to be electrically connected to a neutral point of the three-level power conversion circuit. The noise current leaking out from the frame is thereby drawn back to the neutral point of the three-level power conversion circuit to suppress the flowing out of the noise current to the outside of the power conversion device and reduce the noise current.
    Type: Grant
    Filed: October 1, 2019
    Date of Patent: September 27, 2022
    Assignee: Hitachi, Ltd.
    Inventors: Shoya Akazawa, Hiroyuki Ozawa
  • Patent number: 11451162
    Abstract: The invention concerns a method for controlling an assembly of at least two inverters (1a, 1b) in an electricity generating system with parallel inverters. The method comprises the implementation by at least one data processing unit (2a, 2b) of the steps: (a) for each inverter (1a, 1b) of the assembly, obtaining an input duty factor (PWMi) of an input signal (Si) received by the inverter (1a, 1b), (b) calculating a mean duty factor (PWMm) from the input duty factors (PWMi), (c) modulating and synchronising the input signal (Si) received by each inverter (1a, 1b) into an output signal (So) having an output duty factor (PWMo) corresponding to the mean duty factor (PWMm).
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: September 20, 2022
    Assignee: SAFRAN ELECTRICAL & POWER
    Inventors: Ashvin Jankee, Guillaume Capron, Frédéric Pailhoux, Pascal Morin, Sonia Dhokkar
  • Patent number: 11451140
    Abstract: A power supply device includes a battery circuit module group in which a plurality of battery circuit modules are connected in series via their output terminals. The power supply device further includes a control circuit configured to: output, at intervals of a certain time, a gate signal for turning on and off a first switching element and a second switching element of each battery circuit module to the battery circuit modules in the battery circuit module group; and select one of the battery circuit modules that receives an input of the gate signal to output a predetermined voltage from the power supply device.
    Type: Grant
    Filed: April 19, 2021
    Date of Patent: September 20, 2022
    Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Shigeaki Goto, Keisuke Ishikawa, Shuji Tomura, Naoki Yanagizawa
  • Patent number: 11444463
    Abstract: A low voltage, low frequency multi-level power converter capable of power conversion is disclosed. The power converter may include a low voltage, low frequency circuit that includes a plurality of phase-shifting inverters in series; a plurality of low voltage source inputs, and a plurality of phase-shifting inverters in series. Each of the plurality of phase-shifting inverters may be configured to receive at least one of the plurality of low voltage source inputs; and generate at least one square wave output. A semi-sine wave output may be derived from the generated at least one square wave output.
    Type: Grant
    Filed: December 21, 2020
    Date of Patent: September 13, 2022
    Assignee: JABIL INC.
    Inventors: Salman Talebi Rafsanjan, David Michael Eckerson
  • Patent number: 11437823
    Abstract: A direct current (DC) bus voltage from a combined output of a plurality of DC power modules is controlled based on an alternating current (AC) voltage of a power grid. The DC bus voltage tracks the AC grid voltage to provide efficient conversion between the DC power sources and the AC grid, even when the amplitude of the AC grid voltage varies. In one example, a variable reference voltage is generated based on a detected AC grid voltage. The reference voltage increases and decreases in proportion to increases and decreases in the AC grid voltage. In this manner, large differences between the bus voltage and the grid voltage are avoided. By closely tracking the two voltages, efficiency in the modulation index for power conversion can be achieved.
    Type: Grant
    Filed: January 13, 2020
    Date of Patent: September 6, 2022
    Assignee: Huawei Digital Power Technologies Co., Ltd.
    Inventors: Xiaolin Mao, Heping Dai, Huibin Zhu, Dianbo Fu
  • Patent number: 11431276
    Abstract: A method for operating a brushless electric motor of a motor vehicle, particularly an electromotive refrigerant compressor, with two sub-motors arranged in sections and each comprising n-phases, by means of a converter corresponding to the number of phases of the electric motor. On the basis of a performance requirement, first switching points are determined for the n-phases, of one of the sub-motors, and on the basis of the performance requirement, second switching points are determined for the n-phases of the other sub-motor. The second switching points are shifted by a first phase angle and the converter is controlled on the basis of the first switching points and the second switching points. The first phase angle is selected such that a resulting current flow over the converter is smaller than a first threshold value. A unit of a motor vehicle, comprising a brushless electric motor is also disclosed.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: August 30, 2022
    Assignee: Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg
    Inventors: Hans-Joachim Schroeder, Axel Steinshorn, Armin Dietz
  • Patent number: 11411533
    Abstract: A system, method, and solar photovoltaic (PV) network for solar PV variability reduction with reduced time delays and battery storage optimization are described. The system includes a Moving Regression (MR) filter; a State of Charge (SoC) feedback control; and a Battery Energy Storage System (BESS). The MR filter, SoC feedback control and BESS are configured to provide smoothing of solar PV variabilities. The MR filter is a non-parametric smoother that utilizes a machine learning concept of linear regression to smooth out solar PV variations at every time step.
    Type: Grant
    Filed: April 5, 2022
    Date of Patent: August 9, 2022
    Assignee: King Fahd University of Petroleum and Minerals
    Inventors: Muhammad Khalid, Miswar Akhtar Syed
  • Patent number: 11411399
    Abstract: A method for a direct current (DC) power distribution arrangement and a direct current (DC) power distribution arrangement, comprising a plurality of DC power distribution subsystems. Each DC power distribution subsystem comprises an inverter unit (INU) configured to operate as a subsystem-specific circuit breaker for intercoupling/separating the DC power distribution subsystem to/from the rest of the DC power distribution arrangement.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: August 9, 2022
    Assignee: Vacon Oy
    Inventors: Stefan Strandberg, Risto Komulainen
  • Patent number: 11374501
    Abstract: A phase balancer includes a plurality of power conversion circuits, a direct current transformer, and a plurality of phase-nodes. Each of the power conversion circuits may include a throughput, a capacitor bank, and a direct current bus. The direct current transformer may be coupled to each of the direct current buses to move energy between the power conversion circuits. Each throughput may be operatively coupled to the capacitor bank of one power conversion circuit and the throughput of another power conversion circuit to move current between the plurality of power conversion circuits.
    Type: Grant
    Filed: March 26, 2021
    Date of Patent: June 28, 2022
    Assignee: Product Development Associates, Inc.
    Inventor: Christopher Paul Henze
  • Patent number: 11362576
    Abstract: An apparatus such as a power supply system includes a switched-capacitor converter operative to receive an input voltage. The switched-capacitor converter includes multiple resonant circuit paths to convert the input voltage into a first output voltage and a second output voltage. A first output of the switched-capacitor converter is operative to output the first output voltage; a second output of the switched-capacitor converter is operative to output the second output voltage.
    Type: Grant
    Filed: March 16, 2021
    Date of Patent: June 14, 2022
    Assignee: Infineon Technologies Austria AG
    Inventor: Roberto Rizzolatti
  • Patent number: 11359598
    Abstract: A method and associated apparatus for determining at least one parameter of an energy conversion device, the method comprising determining one or more losses associated with the energy conversion device; determining at least one parameter of the energy conversion device by improving, varying, optimising or maximising at least one operational variable and/or output of the energy conversion device (such as a power output of the energy conversion device) by reducing, minimising or optimising the one or more losses or a function thereof; and determining a value, range or function of at least one parameter of the energy conversion device (such as a power or torque curve) associated with, or that results in, the improvement, variation, optimisation or maximisation of the at least one operational variable (e.g. power output) and/or output of the energy conversion device and/or that results in the reduction, minimisation or optimisation of the one or more losses.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: June 14, 2022
    Assignee: POWER ENABLE SOLUTIONS LIMITED
    Inventor: Estanislao Juan Pablo Echenique Subiabre
  • Patent number: 11342878
    Abstract: A regenerative power conversion system with a phase shift transformer having a primary circuit and N secondary sets of M secondary circuits, a controller synchronizes rectifier switching control signals of individual regenerative power stages to a phase angle of a corresponding one of the secondary circuits based on a feedback signal of the primary circuit during regenerative operation of the power conversion system.
    Type: Grant
    Filed: April 9, 2021
    Date of Patent: May 24, 2022
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Ahmed Hisham Abuelnaga, Mehdi Narimani, Zhongyuan Cheng, Navid R. Zargari
  • Patent number: 11336091
    Abstract: Provided are an energy storage power supply, a parallel control device for energy storage power supplies and a parallel control method for energy storage power supplies. The energy storage power supply includes a battery module; an inverter module electrically connected to the battery module; an output module electrically connected to the inverter module; an detection module electrically connected to the output module; an communication module communicated with another energy storage power supply; an switching module electrically connected to the inverter module or the output module; and a processor module electrically connected to the detection module, the communication module and the switching module, and is configured to control, according to the power of a load detected by the detection module, the switching module to be electrically connected to the inverter module or the output module.
    Type: Grant
    Filed: November 11, 2020
    Date of Patent: May 17, 2022
    Assignee: Shenzhen Hello Tech Energy Co Ltd.
    Inventors: Zhongwei Sun, Jie Zhang, Zhiyuan Zhong, Yanqiu Chu, Peixin Zhang, Hongwei Mi
  • Patent number: 11322937
    Abstract: A power supply device with improved current balancing mechanism includes a power supply module, and a current detecting module detecting the output current to generate a sample voltage. A compensation voltage is provided that is in superposition with the sample voltage to synthesizes a corrected sample voltage, and a current mirror unit receives the corrected sample voltage at a first end. A positive input end of a comparator unit is connected to a second end of the current mirror unit, and is connected to the first end through a voltage divider, while the comparator unit outputs the current share voltage under negative feedback control. The current share output is corrected by compensating the sampling voltage and reflecting it by a current mirror with a certain ratio, the inconvenience of manually adjusting variable resistor, or the problem of temperature influenced BJT and MOSFET, or phase delay of digital sampling is solved.
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: May 3, 2022
    Assignee: Acbel Polytech Inc.
    Inventor: Chia-Chih Hsiang
  • Patent number: 11289995
    Abstract: A method for generating an alternating electric current is provided. The method includes generating a plurality of component currents, superposing the component currents to form a summation current. Each component current is modulated by voltage pulses and the voltage pulses for each component current are generated by a component switching device by virtue of the component switching device generating the voltage pulses by switching between different input voltages. The method includes specifying a tolerance band for the summation current having an upper and a lower tolerance limit, where the summation current is detected and the switching of each component switching means is controlled to generate the voltage pulses for modulating the component current depending on the detected summation current with respect to the tolerance band. The plurality of component switching devices are switched at least partly or predominantly in a manner asynchronous with respect to one another.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: March 29, 2022
    Assignee: Wobben Properties GmbH
    Inventor: Albrecht Gensior
  • Patent number: 11289910
    Abstract: A method and apparatus for setting an impedance of a power conditioning unit (PCU). In one embodiment, the method comprises applying a disturbance to a virtual AC voltage produced by a power conditioning unit (PCU) that is coupled to a power grid, where the disturbance has a first phase; measuring a second phase of the applied disturbance on the power grid; comparing the second phase of the applied disturbance to the first phase of the disturbance; and adjusting, when the second phase differs from the first phase by more than a threshold amount, an impedance of the PCU.
    Type: Grant
    Filed: July 6, 2020
    Date of Patent: March 29, 2022
    Assignee: Enphase Energy, Inc.
    Inventor: Donald Richard Zimmanck
  • Patent number: 11283368
    Abstract: An open phase detection system for a power conversion system includes a phase difference abnormality detection unit, an amplitude difference abnormality detection unit, and an open phase determination unit. The phase difference abnormality detection unit outputs a phase difference abnormality signal when an absolute value of a phase difference between a current flowing through a reactor and a current flowing through a capacitor is equal to or smaller than a phase threshold value. The amplitude difference abnormality detection unit outputs an amplitude difference abnormality signal when an absolute value of a value based on an amplitude difference between the current flowing through the reactor and the current flowing through the capacitor is equal to or smaller than an amplitude threshold value. The open phase determination unit outputs an open phase signal when receiving inputs of both the phase difference abnormality signal and amplitude difference abnormality signal.
    Type: Grant
    Filed: May 14, 2019
    Date of Patent: March 22, 2022
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Kenta Yamabe, Yoshihiro Tawada, Tomoya Katsukura
  • Patent number: 11271508
    Abstract: In a power converter, a first single-phase AC conversion unit, which is connected to a first line of a first phase and a second line of a second phase of a first three-phase AC, a second single-phase AC conversion unit, which is connected to the second line of the second phase and a third line of a third phase of the first three-phase AC, and a third single-phase AC conversion unit, which is connected to the third line of the third phase and the first line of the first phase of the first three-phase AC, form a delta-connected load for an AC power supply system. At least the first single-phase AC conversion unit, the second single-phase AC conversion unit, and the third single-phase AC conversion unit form a first set in which respective output terminals are connected in series to one another, and the first set, and a second set and a third set, which are different from the first set, form each phase of a star connected power supply.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: March 8, 2022
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Naoto Niimura, Teruo Yoshino
  • Patent number: 11223287
    Abstract: A resonant DC-DC converter includes an inverter circuit, a rectifier circuit and a transformer unit. The inverter circuit is connected to a first terminal of the transformer unit, and the rectifier circuit is connected to a second terminal of the transformer unit. The first and second terminals are galvanically isolated from one another by a first transformer. The transformer unit is configured to adapt a transformation ratio of the transformer unit. The transformer unit has an energy transmission path which includes an inverter and a second transformer, with an input of the energy transmission path being arranged parallel to a primary side of the first transformer and an output of the energy transmission path being arranged in series with the secondary side of the first transformer.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: January 11, 2022
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Martin Hergt, Marcel Lutze, Sebastian Nielebock, Markus Pfeifer, Markus Zocher
  • Patent number: 11205946
    Abstract: A photovoltaic power generation system, having a photovoltaic panel, which has a direct current (DC) output and a micro-inverter with input terminals and output terminals. The input terminals are adapted for connection to the DC output. The micro-inverter is configured for converting an input DC power received at the input terminals to an output alternating current (AC) power at the output terminals. A bypass current path between the output terminals may be adapted for passing current produced externally to the micro-inverter. The micro-inverter is configured to output an alternating current voltage significantly less than a grid voltage.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: December 21, 2021
    Assignee: Solaredge Technologies Ltd.
    Inventors: Ilan Yoscovich, Meir Gazit, Tzachi Glovinsky, Yoav Galin
  • Patent number: 11201563
    Abstract: Systems and methods for multilevel hysteresis current control for a cascaded multilevel converter having a plurality of power cells connected in series with a positive integer number of output voltage levels, and to control any shape of AC/DC current in the load, transfer electrical power from energy storage elements of the power cells to that load and recover the energy back to the storage elements. Systems and methods for voltage balancing on energy storage elements of the power cells to determine whether to inject energy into or extract energy from a selected storage element, and for zero switching state rotation technique of switching elements in each power cell of cascaded multilevel converter.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: December 14, 2021
    Assignee: TAE Technologies, Inc.
    Inventor: Mikhail Slepchenkov
  • Patent number: 11167648
    Abstract: Modulated pulse control of electric machines to deliver a desired output in a more energy efficient manner by either (a) operating the electric machine in a continuous mode when a requested torque demand is greater than the peak efficiency torque of the electric machine or (b) in a pulsed modulation mode when the requested torque demand is less than the peak efficiency torque of the electric machine. When operating in the pulsed modulation mode, the inverter may be deactivated to further improve the system efficiency when field weakening is not required to mitigate or eliminate generation of a retarding torque in situations when Back Electromagnetic Force (BEMF) exceeds a supply voltage for the inverter of the machine.
    Type: Grant
    Filed: March 17, 2021
    Date of Patent: November 9, 2021
    Assignee: Tula eTechnology, Inc.
    Inventors: Paul Carvell, Adya S. Tripathi
  • Patent number: 11146179
    Abstract: A device includes: a first power conversion circuitry configured to convert primary-side power into secondary-side power; and a control circuitry configured to: generate a command value associated with the secondary-side power; calculate a limited command value by modifying the command value so that the command value is equal to or less than a secondary-side limit, wherein the first power conversion circuitry is controlled based on the limited command value; transmit the limited command value to a second power conversion device comprising a second power conversion circuitry connected in parallel to the first power conversion circuitry; receive, from the second power conversion device, information indicating an adjustment value, wherein the adjustment value is added to the limited command value for controlling the second power conversion circuitry; and modify the secondary-side limit based on a difference between a primary-side limit associated with the primary-side power and the adjustment value.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: October 12, 2021
    Inventors: Akira Yamazaki, Kentaro Inomata, Masato Higuchi
  • Patent number: 11133752
    Abstract: A modular multilevel converter with multi-port DC power flow control includes a modular multilevel converter topology and a DC power flow controller, wherein an input terminal of the DC power flow controller is connected in series to uppermost submodules of upper arms of the modular multilevel converter topology, and with power transfer and energy interaction between the modular multilevel converter topology and an AC power grid, a converter station or a solid state transformer based on the modular multilevel converter topology has a function of direct current power flow control. The output terminal of the DC power flow controller adopts DC/DC converters to regulate the output voltage, and a plurality of DC/DC converters share a common DC bus with the ports connected with different DC outlet lines, thereby providing a plurality of flexible and controllable DC ports.
    Type: Grant
    Filed: March 10, 2021
    Date of Patent: September 28, 2021
    Assignee: SHANGHAI JIAO TONG UNIVERSITY
    Inventors: Jianwen Zhang, Weixin Fang, Jianqiao Zhou, Gang Shi, Han Wang, Xu Cai
  • Patent number: 11128212
    Abstract: Systems and methods for current ripple reduction for a direct current (DC) source powering an alternating current (AC) load. In accordance with one embodiment, the system and method involve interleaved operation of a 3×3-phase AC motor having multiple groups of windings. In accordance with another embodiment, the system and method involve interleaved operation of multiple co-shafted 3-phase AC motors. In accordance with a further embodiment, the system and method involve interleaved operation multiple 3-phase AC motors (not co-shafted) of the same level of power. The interleaved operation entails interleaved switching inside a set of inverters which are connected in parallel between a DC bus and the windings of the AC motor (motors).
    Type: Grant
    Filed: March 2, 2020
    Date of Patent: September 21, 2021
    Assignee: The Boeing Company
    Inventors: Shengyi Liu, Eugene V. Solodovnik, Frederic Lacaux, Kamiar J. Karimi
  • Patent number: 11128142
    Abstract: The invention discloses a photovoltaic power generation system and a method for controlling the same. The photovoltaic power generation system comprises: an string of optimizing modules and an inverter, the string of optimizing modules comprises a plurality of optimizing modules each having an input port coupled to at least one photovoltaic module, output ports of the plurality of optimizing modules are connected in series, each of the optimizing modules comprises a control unit, an input port of the inverter is coupled to an output port of the string of optimizing modules, and the inverter comprises an auxiliary detection module for auxiliary detecting an output current of the string of optimizing modules, and the control unit controls an output voltage of the string of optimizing modules based on the output current of the string of optimizing modules, such that the output voltage satisfies a start-up condition of the inverter.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: September 21, 2021
    Assignee: Delta Electronics (Shanghai) Co., Ltd.
    Inventors: Xuancai Zhu, Bingwen Weng, Qin Wang, Wei Zhao