With Means To Introduce Or Eliminate Frequency Components Patents (Class 363/39)
  • Patent number: 11404247
    Abstract: In some embodiments, a high voltage power supply is disclosed that provides a plurality of high voltage pulses without any voltage droop between two subsequent pulses. In some embodiments, a high voltage power supply is disclosed that provides a waveform of voltage versus time having a plurality of high voltage pulses having a voltage greater than 1 kV and with a substantially flat portion between pulse. In some embodiments, a high voltage power supply is disclosed that includes a snubber with a snubber resistor having a resistance of about 7.5 m?-1.25?; and a snubber capacitor having a capacitance of about 2 ?F-35 ?F.
    Type: Grant
    Filed: July 9, 2021
    Date of Patent: August 2, 2022
    Assignee: Eagle Harbor Technologies, Inc.
    Inventors: Christopher Bowman, Connor Liston, Kenneth Miller, Timothy Ziemba
  • Patent number: 11378609
    Abstract: A method for identifying a location of a fault in an electrical power distribution network that includes identifying an impedance of an electrical line between each pair of adjacent utility poles, measuring a voltage and a current of the power signal at a switching device during the fault, and estimating a voltage at each of the utility poles downstream of the switching device using the impedance of the electrical line between the utility poles and the measured voltage and current during the fault. The method calculates a reactive power value at each of the utility poles using the estimated voltages, where calculating a reactive power value includes compensating for distributed loads along the electrical line that consume reactive power during the fault, and determines the location of the fault based on where the reactive power goes to zero along the electrical line.
    Type: Grant
    Filed: March 23, 2020
    Date of Patent: July 5, 2022
    Assignee: S&C Electric Company
    Inventor: Yoav Sharon
  • Patent number: 11264983
    Abstract: Methods, apparatus, systems and articles of manufacture are described to parallelize transistors. An example apparatus includes a first transistor on a first die and a second transistor on a second die. The example apparatus includes a parallel feedback terminal coupled to the first die and the second die and a current sensor including a first contact and a second contact. The example apparatus includes a resistor coupled to the current sensor and at least one of the switched terminal or a ground terminal. The example apparatus includes an active drive controller including a first input coupled to the resistor, a second input coupled to the parallel feedback terminal, and an output coupled to the parallel feedback terminal. The example apparatus includes an edge delay controller adapted to be coupled to a gate driver and an error amplifier, and a control contact adapted to be coupled to the gate driver.
    Type: Grant
    Filed: November 2, 2020
    Date of Patent: March 1, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Cetin Kaya, Nathan Richard Schemm
  • Patent number: 11258346
    Abstract: A power converter is configured to convert, into an AC voltage, a DC voltage supplied from a DC power supply connected between a first power supply wiring and a first ground wiring. A control device is connected between a second power supply wiring and a second ground wiring. The second power supply wiring is configured to supply a second power supply voltage lower than the first power supply voltage. The control device is configured to control the power converter. A separation device is configured to separate the first ground wiring and the second ground wiring from each other. The first ground wiring and the second ground wiring are electrically connected to each other at a single node.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: February 22, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kenji Iwazaki, Koichi Arisawa
  • Patent number: 11228258
    Abstract: In the present uninterruptible power supply apparatus (U1), in a power failure of a commercial AC power supply (41), a switch (1) is turned off to electrically cut off the commercial AC power supply (41) from an AC input filter (2), and when DC voltage (?E=Ep?En) that is the difference between terminal-to-terminal voltages (Ep, En) of first and second capacitors (C1, C2) exceeds a threshold voltage (ETH), first and second IGBT devices (Q1, Q2) or third and fourth IGBT devices (Q3, Q4) included in the converter (3) are turned on and off to reduce DC voltage (?E).
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: January 18, 2022
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventor: Yousuke Hayashi
  • Patent number: 11211872
    Abstract: A boost rectifier that operates with a single-phase input voltage includes (i) an input stage receiving the single-phase input voltage and including first and second input filter capacitors, (ii) a switching converter stage coupled to the input stage and including a rectification circuit and an inductor circuit, series-connected first and second switches providing a common terminal therebetween, and a phase output capacitor, (iii) an output stage that transfers energy stored in the phase output capacitor to an output load, (iv) a decoupling stage that provides high-impedance decoupling between the switching converter stage and the output stage, and (v) a control circuit configured to operate the first and second switches according to an output signal of a non-linear compensation circuit that combines a feedforward signal derived from both the input and output voltages of the boost rectifier with an output voltage feedback control signal.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: December 28, 2021
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Yungtaek Jang, Misha Kumar, Tomas Sadilek, Peter Barbosa
  • Patent number: 11159083
    Abstract: A wind power installation and a method for feeding a filtered alternating current into an electrical supply grid by the wind power installation are provided. The wind power installation includes at least one inverter having an inverter output for providing an inverter current. The at least one inverter is coupled at its inverter output to an active filter. The active filter filters the inverter current provided at the inverter output and provides the filtered alternating current for feeding into the electrical supply grid. The method includes providing the inverter current at the inverter output by switching at least one switch of the inverter, sensing the switching, and controlling the active filter based on the sensed switching to filter the inverter current provided at the inverter output and produce the filtered alternating current.
    Type: Grant
    Filed: July 22, 2019
    Date of Patent: October 26, 2021
    Assignee: Wobben Properties GmbH
    Inventor: Christian Heyen
  • Patent number: 11070139
    Abstract: Systems and methods to estimate magnetic flux in a switched mode power supply are disclosed. An example welding-type power supply includes a switched mode power supply, comprising: a transformer configured to transform an input voltage to a welding-type voltage; a capacitor in series with a primary winding of the transformer; and switches configured to control a voltage applied to a series combination of the primary winding of the transformer and the capacitor; a voltage estimator coupled to the transformer and configured to output a signal representative of an alternating-current (AC)-coupled voltage at the capacitor; and a flux accumulator to determine a net flux in the transformer based on the voltage applied to the series combination of the primary winding of the transformer and the capacitor.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: July 20, 2021
    Assignee: Illinois Tool Works Inc.
    Inventors: Adam E. Anders, Brian Schwartz, Andrew D. Nelson, Bernard J. Vogel
  • Patent number: 11050255
    Abstract: A method and associated system for minimizing grid feedback of a PV park to an energy supply grid connected to a point of common coupling is disclosed, wherein the PV park has a plurality of inverters divided into groups. The method includes, for at least a first inverter of each group, determining a first parameter representative of a first coupling impedance between the first inverter and the point of common coupling and determining a second parameter representative of a second coupling impedance between the group containing the first inverter and the point of common coupling. The method further includes storing the first parameter and the second parameter in an operating control unit of the first inverter, and, in daytime operation of the PV park, feeding in reactive power by the first inverter depending on the first parameter, said reactive power corresponding to the magnitude of a reactive power drawn by the respective underlying first coupling impedance.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: June 29, 2021
    Assignee: SMA Solar Technology AG
    Inventors: Denis Mende, Thorsten Buelo
  • Patent number: 11038416
    Abstract: A drive signal generating circuit that generates a drive signal for turning on and off a transistor based on an output voltage and an inductor current flowing through an inductor, includes: a reference current output unit that outputs a reference current serving as a reference for the inductor current; a command value output unit that outputs a command value for increasing and decreasing the inductor current when the inductor current is smaller and greater than the reference current, respectively; and a drive signal output unit that outputs the drive signal based on the command value such that the output voltage achieves a target level, the reference current output unit configured to output the reference current based on the command value output from the command value output unit and a value corresponding to a first error between a level of the output voltage and the target level.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: June 15, 2021
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Ryuji Yamada
  • Patent number: 10992139
    Abstract: An electrical power system includes a photovoltaic panel, configured to generate electrical power from a solar source. An output source is electrically coupled to the photovoltaic panel with a first maximum power point tracking charge controller. An inverter is electrically coupled to the photovoltaic panel with a second maximum power point tracking charge controller. A bi-directional buck/boost converter is electrically coupled to the first maximum power point charge controller and the second maximum power point charge controller and programmed with instructions to determine a photovoltaic panel current coming in from the photovoltaic panel. Then, direct an output source current to the output source. After that, direct a inverter current to the inverter.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: April 27, 2021
    Inventor: Farid Dibachi
  • Patent number: 10965245
    Abstract: According to an embodiment of the present invention, there is provided a photovoltaic module including a photovoltaic solar cell, a converter to convert a level of a direct current power from the photovoltaic solar cell, an inverter to convert the direct current power from the converter into an alternating current power, a controller to control the converter and the inverter, and a communication unit to perform electric power line communication with a gateway and at least one nearby photovoltaic module, in which the communication unit periodically transmits communication state information to the gateway and the at least one nearby photovoltaic module using the electric power line communication, and receives a message transmitted by the gateway along a path determined according to the communication state information.
    Type: Grant
    Filed: October 12, 2018
    Date of Patent: March 30, 2021
    Assignee: LG ELECTRONICS INC.
    Inventors: Dongho Han, Hyunho Do, Juhwan Yun
  • Patent number: 10951127
    Abstract: A power conversion apparatus includes a plurality of power conversion units, a common bus bar, and a plurality of unit bus bars provided so as to correspond to the plurality of the power conversion units respectively and connecting each DC side of the plurality of the power conversion units to the common bus bar. Each of the power conversion units includes a casing having a first surface on which a first outer plate of a magnetic material is arranged, and the first outer plate is arranged in a vicinity of a corresponding unit bus bar and faces the corresponding unit bus bar with a gap so that an inductance value of the corresponding unit bus bar is increased to an inductance value capable of suppressing an inflow of a ripple current from another power conversion unit in the power conversion apparatus.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: March 16, 2021
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Hiroyoshi Komatsu, Takehiro Takahashi, Yukihisa Iijima
  • Patent number: 10926649
    Abstract: A multiple stage switching type converter circuit provided between an AC source and a DC source is provided. The circuit includes a boost converter stage coupled to the AC source, a DC link capacitor stage comprising a DC link capacitor decoupled from an AC source and a DC source, and an isolated DC-DC converter stage coupled to the DC source. The multiple stage switching type converter circuit comprises a plurality of switches, each switch configured to operate at a baseline duty cycle, a baseline voltage, a baseline resistance, with a baseline current and providing a baseline switching time. At least one switch is altered to perform at a duty cycle differing from the baseline duty cycle, a voltage differing from the baseline voltage, a resistance differing from baseline resistance, with a current differing from the baseline current or using a switching time differing from the baseline switching time.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: February 23, 2021
    Assignee: Flex Power Control, Inc.
    Inventors: James Michio Nagashima, Gregory Scott Smith
  • Patent number: 10897241
    Abstract: A hysteresis control method for inverter and an inverter based on hysteresis control are disclosed. The inverter is electrically connected to a power grid, and the method includes: Step S1, sampling a grid voltage Vg(z) and an output current Ig(z) of the inverter; Step S2, calculating a present period hysteresis bandwidth H(z) based on the grid voltage Vg(z) sampled in step S1; Step S3, predicting a next period hysteresis bandwidth H(z+1); Step S4, correcting the present period hysteresis bandwidth H(z) based on the next period hysteresis bandwidth H(z+1) obtained in step S3, to obtain a final hysteresis bandwidth Hout(z); and Step S5, controlling an output driving signal according to the output current Ig(z) of the inverter and the final hysteresis bandwidth Hout(z) to control the operation of the inverter.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: January 19, 2021
    Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Qikang Wei, Feidong Xu, Xuancai Zhu
  • Patent number: 10784792
    Abstract: A power conversion device that converts power supplied via a first power feed bus and a second power feed bus, and includes: an inductance element connected to the first power feed bus; and a power module that converts power supplied between the first power feed bus and the second power feed bus by switching. The power conversion device further includes: a housing that houses the inductance element and the power module therein; and a first impedance element provided between the inductance element and the housing.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: September 22, 2020
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Kentaro Shin, Shigeharu Yamagami
  • Patent number: 10756772
    Abstract: An apparatus is disclosed for mixing signals with a multi-mode mixer for frequency translation. In example implementations, a multi-mode mixer includes a supply voltage node, a ground node, a first data signal coupler, and a second data signal coupler. The multi-mode mixer also includes a mixer core and a current control switch. The mixer core is coupled between the first data signal coupler and the second data signal coupler. The current control switch is configured to selectively enable or disable flow of a current through the mixer core. The first data signal coupler, the second data signal coupler, the mixer core, and the current control switch are coupled together in series between the supply voltage node and the ground node.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: August 25, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Chirag Dipak Patel, Jeremy Goldblatt, Yunfei Feng, Li Liu, Xinmin Yu, Aliakbar Homayoun
  • Patent number: 10727669
    Abstract: Apparatuses including power electronics circuitry are provided. The power electronics circuitry includes at least one power converter that is coupled to a DC bus. Moreover, in some embodiments, the at least one power converter is configured to regulate a voltage of the DC bus. Related methods of operating an apparatus including power electronics circuitry are also provided.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: July 28, 2020
    Assignees: Duke Energy Corporation, The University of North Carolina at Charlotte
    Inventors: Stuart Laval, Aleksandar Vukojevic, Somasundaram Essakiappan, Madhav Manjrekar, Ehab Shoubaki
  • Patent number: 10644598
    Abstract: An automotive system includes a battery and a switching converter circuit. The switching converter circuit includes an output inductor estimator circuit coupled to a driver and a switch node of the switching converter circuit. The output inductor estimator circuit is configured to estimate inductance for an output inductor based on a comparison of sampled voltages from the switch node with voltage error values obtained using an adjustable estimated inductance parameter. The output inductor estimator circuit is configured to provide a signal indicating the estimated inductance for the output inductor.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: May 5, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Artur Juliusz Lewinski Komincz, Abdelhalim Alsharqawi
  • Patent number: 10608434
    Abstract: A power transmission network including: a variable power source; an AC transmission link for AC power transmission from the variable power source to at least one source side converter; at least one source side converter including: an AC connecting point operably connected to the AC transmission link; and a DC connecting point for connection to a DC transmission link; and a control system configured to operate the source side converter or at least one of the source side converters in a frequency damping mode to control an AC voltage at its AC connecting point and thereby damp at least one frequency component at its AC connecting point and/or in the AC transmission link.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: March 31, 2020
    Assignee: General Electric Technology GmbH
    Inventors: Andrzej Adamczyk, Carl David Barker, Robert Stephen Whitehouse
  • Patent number: 10434842
    Abstract: An in-vehicle inverter device includes a noise reduction circuit, which has a common mode choke coil configured to reduce common mode noise and normal mode noise contained in DC power, and an inverter circuit, which receives the DC power in which the noise has been reduced. The noise reduction circuit includes: an input-side capacitor and an input-side resistor provided on the input side of the choke coil; an output-side capacitor and an output-side resistor provided on the output side of the choke coil; a first filter circuit that includes the choke coil, the input-side capacitor, and the input-side resistor; and a second filter circuit that includes the choke coil, the output-side capacitor, and the output-side resistor. The first and the second filter circuits reduce leakage noise generated in the inverter circuit.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: October 8, 2019
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Takao Kawasaki, Yoshiki Nagata, Fumihiro Kagawa, Shunsuke Ambo, Koki Suzuki
  • Patent number: 10439399
    Abstract: A power system including a rectifier and an inverter. The rectifier has a plurality of phase input terminals and a plurality of rectifier output terminals that provide respective rectified outputs, rectifier circuitry that rectifies the signals on the phase input terminals to generate respective rectified outputs on the rectifier output terminals, a rectifier neutral to receive a power source neutral, and capacitors connected between the rectifier neutral and the rectifier output terminals. The inverter includes a respective plurality of inverter input terminals respectively connected to the rectifier output terminals, a plurality of inverter output terminals, and an inverter neutral. The rectifier neutral and the inverter neutral are coupled by a conductor to form a same neutral.
    Type: Grant
    Filed: May 1, 2018
    Date of Patent: October 8, 2019
    Assignee: Google LLC
    Inventors: Sangsun Kim, Anand Ramesh, Scott Aldous, John Zipfel
  • Patent number: 10418821
    Abstract: A PCS comprises a DC/DC convertor that converts a voltage of a DC power input from a solar cell; an inverter that converts the DC power to an AC power; and a controller 134 that stops an operation of the DC/AC convertor without stopping the inverter when a condition that stops an output of the solar cell is satisfied.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: September 17, 2019
    Assignee: KYOCERA Corporation
    Inventors: Masaomi Satake, Masahiro Baba, Yuri Sato, Kenta Igarashi, Megumi Kuwabara
  • Patent number: 10218262
    Abstract: A system includes a converter operatively connected to an alternating current (AC) power source and a direct current (DC) bus, an inverter operatively connected to a motor and the DC bus, and a hybrid DC link system operatively connected between a high side and a low side of the DC bus. The converter includes a first plurality of switching devices in selective communication with each phase of the AC power source and the DC bus. The inverter includes a second plurality of switching devices in selective communication with each phase of the motor and the DC bus. The hybrid DC link system includes a ripple current control branch in parallel with an energy buffering branch.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: February 26, 2019
    Assignee: OTIS ELEVATOR COMPANY
    Inventor: Ismail Agirman
  • Patent number: 10126332
    Abstract: Electrical current transducer (2) of a closed-loop type for measuring a primary current (IP) flowing in a primary conductor (1), comprising a fluxgate measuring head (7) and an electronic circuit (16) including a microprocessor (18) for digital signal processing. The measuring head includes a secondary coil (6) and a fluxgate detector (4) comprising an excitation coil and a magnetic material core. The electronic circuit comprises an excitation coil drive circuit (14) configured to generate an alternating excitation voltage to supply the excitation coil with an alternating excitation current (Ifx), the secondary coil (6) connected in a feedback loop (12) of the electronic circuit to the excitation coil drive circuit (14), the electronic circuit further comprising a ripple compensation circuit (26, 28) configured to compensate for a ripple signal generated by the alternating excitation voltage.
    Type: Grant
    Filed: July 20, 2015
    Date of Patent: November 13, 2018
    Assignee: LEM INTELLECTUAL PROPERTY SA
    Inventors: Wolfram Teppan, Davide Azzoni
  • Patent number: 9971371
    Abstract: A method predicts a voltage collapse in a micro-grid connected to a power distribution network by measuring states at a point of common coupling of the micro-grid, and a connected bus of the power distribution network connected to the micro-grid through a connection link. Then, it is determined whether a reactive power generation limit of the micro-grid is reached based on the states, and if no, repeating the measuring, and otherwise determining parameters of the connection link using the measurements. A static voltage stability margin index is determined, and a voltage stability margin index is predicted using the static voltage stability margin index and a forecast of future load variations in the micro-grid. Then, it is determined whether the voltage stability margin index is smaller than a threshold, and if no, repeating the measuring, determining and predicting steps, and otherwise if yes, signaling a control action indicating the voltage collapse.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: May 15, 2018
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Hongbo Sun, Zhao Wang
  • Patent number: 9923469
    Abstract: Disclosed examples include methods, power converters and damping circuits to control damping of an input filter circuit, in which a low-voltage secondary winding is wound around a common core with a primary winding connected between an AC input and a rectifier input of the converter, where the secondary winding is coupled in a series circuit with a damping resistor and a switch, and a controller selectively closes the switch with a controlled on-time at system power up and/or in response to detection of oscillation or transients in the power converter.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: March 20, 2018
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Yuan Xiao, Zhongyuan Cheng, Lixiang Wei, Navid R. Zargari
  • Patent number: 9840097
    Abstract: The disclosure discloses a printer including a load circuit, a controller, a power receiving terminal, a first switching circuit, and a second switching circuit. The controller is configured to control voltage supply to the load circuit, and is connected to an input part. The power receiving terminal is configured to be connected to a power feeding terminal of an external power source device. The first switching circuit includes a first switch element configured to switch between conduction and interruption in accordance with a first control signal input from the controller, and is connected between the power receiving terminal and the input part. The second switching circuit includes a second switch element configured to switch between conduction and interruption in accordance with a second control signal input from the controller, and is connected between the battery storage part and the input part.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: December 12, 2017
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Shuhei Nohara, Ryohei Murabayashi
  • Patent number: 9832724
    Abstract: According to one embodiment, a radio communication device 1 includes a variable frequency divider 17 that divides a frequency of a reference clock REFCLK and outputs a frequency divided clock DCLK; a controller 15 that controls a frequency dividing ratio of the variable frequency divider 17 so that an integral multiple of a frequency of the frequency divided clock DCLK is not included in a frequency band of a high-frequency signal that has been received from outside by radio; and a DCDC converter 18 that performs a switching operation in synchronization with the frequency divided clock DCLK to generate an output voltage Vout obtained by stepping down an input voltage Vin.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: November 28, 2017
    Assignee: RENESAS ELCTRONICS CORPORATION
    Inventors: Kazuhiro Kijima, Wataru Naito
  • Patent number: 9712049
    Abstract: In a power converter, a housing is grounded. A power converter circuit is installed in the housing and configured to perform power conversion of input power into output power. An external terminal is electrically connected to the power converter circuit for connection of an external device to the power converter circuit. A first capacitor has first and second electrodes. The first electrode of the first capacitor is connected to the external terminal, and the second electrode thereof is connected to the housing. A second capacitor has first and second electrodes. The first electrode of the second capacitor is connected to the external terminal, and the second electrode thereof is connected to the housing. The first capacitor, the external terminal, the second capacitor, and the housing is arranged to provide a conductive loop.
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: July 18, 2017
    Assignees: DENSO CORPORATION, NIPPON SOKEN, INC.
    Inventors: Shinya Goto, Yuuki Takemoto, Katsutoyo Misawa, Tougo Yamaguchi, Shinji Ohoka
  • Patent number: 9673913
    Abstract: A circuit arrangement with an interference protection is disclosed, including a supply line and a ground line, a first circuit and a second circuit. Each of the first and second circuit is connected to the supply line and to the ground line. The circuit arrangement also includes a blocking device coupled to at least the supply line to suppress any interfering signals from being applied to the supply line.
    Type: Grant
    Filed: May 11, 2010
    Date of Patent: June 6, 2017
    Assignee: Intel Deutschland GmbH
    Inventors: Pietro Brenner, Edmund Götz
  • Patent number: 9667177
    Abstract: A power converter for operating a three-phase AC electrical machine from a single phase AC power source includes an ASD having a rectifier and inverter, and an add-on power conversion module external to the ASD that is electrically connected to each of the power source and the ASD. The power conversion module includes one or more input inductors configured to store and filter single-phase AC power received from the power source and a pair of switching devices connected to each of the input inductors at an output end thereof. A controller operably connected to the power conversion module selectively controls switching of the pair of switching devices associated with each of the one or more input inductors so as to cause a sinusoidal single phase AC power to be output from the add-on power conversion module for rectification by the rectifier.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: May 30, 2017
    Assignees: Eaton Corporation, Zhejiang University
    Inventors: Huaqiang Li, Wenxi Yao, Zhengyu Lu
  • Patent number: 9602038
    Abstract: The invention relates to a method (40) for controlling an inverter (10) using space-vector pulse width modulation, in particular to control an electric machine (14), said inverter (10) being equipped with a plurality of controllable switches (S) and a corresponding plurality of freewheeling diodes (D) and being designed to provide a polyphase electric current (IU, IV, IW) and a polyphase voltage in the form of current space vectors (I*, U*), in particular to supply polyphase electric current (IU, IV, IW) to the electric machine (14).
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: March 21, 2017
    Assignee: Robert Bosch GmbH
    Inventor: Andrea Deflorio
  • Patent number: 9571058
    Abstract: A filter for filtering a three-phase electrical power waveform produces a three-phase output power waveform. The filter has an inductor with three sets of first and second coils, each having a capacitor connected in series therewith. Each of the three sets of first and second coils has a tap intermediate the first and second coils where the output waveform is present, each tap capable of being connected to a load. In some embodiments, the inductor is passive adaptive and includes resistors for reducing current in-rush.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: February 14, 2017
    Assignee: MTE Corporation
    Inventors: Todd Shudarek, Joel Mertes
  • Patent number: 9506969
    Abstract: A common mode noise sensor with a single amplification path is disclosed. The common mode noise sensor includes first and second terminals for receiving respective first and second signals from a power supply, an amplifier stage connected to the first and second terminals and having an output and a resistor network connected to the amplifier stage. The resistor network is arranged such that the output of the amplifier stage is configured to provide an output signal in which a differential mode noise in the first and second signals is suppressed in preference to a common mode noise in the first and second signals.
    Type: Grant
    Filed: January 7, 2015
    Date of Patent: November 29, 2016
    Assignee: NXP B.V.
    Inventors: Juergen Stahl, Jens Goettle, Thomas Duerbaum, Alexander Pawellek, Anton Blom, Hans Halberstadt, Frans Pansier
  • Patent number: 9461156
    Abstract: This invention provides a memory structure and an operation method thereof. The memory structure includes a triode for alternating current (TRIAC) and a memory cell. The memory cell is electrically connected to the TRIAC.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: October 4, 2016
    Assignee: Powerchip Technology Corporation
    Inventors: Chen-Hao Huang, Chan-Ching Lin, Hann-Ping Hwang, Chun-Cheng Chen, Tzung-Bin Huang
  • Patent number: 9449498
    Abstract: In certain embodiments, a system includes a master node device. The master node device includes communication circuitry configured to facilitate communication with a welding power supply unit via a long-range communication link, and to facilitate wireless communication with one or more welding-related devices via a short-range wireless communication network. The master node device also includes control circuitry configured to manage power consumption of on-board batteries of the master node device and the one or more welding-related devices.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: September 20, 2016
    Assignee: ILLINOIS TOOL WORKS INC.
    Inventors: Daniel Dina, Kathy Lee Downie
  • Patent number: 9397552
    Abstract: A system including a converter and a snubber circuit. The converter converts an alternating current voltage into a direct current voltage and outputs the direct current voltage across an inductance and a switch connected in series. The inductance has a center tap connected to a node, which is connected to a load. In response to the switch being turned on, a first current flows through the inductance and the switch. In response to the switch being turned off, a second current flows from the node to the load. The snubber circuit is connected across the node and a junction of the inductance and the switch. In response to the switch being turned off, the snubber circuit receives a third current from the junction, and supplies a first portion of the third current to the node. The second current and the first portion of the third current flow through the load.
    Type: Grant
    Filed: May 7, 2014
    Date of Patent: July 19, 2016
    Assignee: Marvell World Trade LTD.
    Inventor: Sehat Sutardja
  • Patent number: 9338843
    Abstract: A driver circuit for use with LED lamps. The driver circuit uses a rectifier, a power factor correction subcircuit, a voltage conversion subcircuit, and a semiconductor switch. The power factor correction subcircuit uses a film capacitor instead of an electrolytic capacitor. As well, the power factor correction subcircuit uses either an inductor or a transformer to shape the incoming current to a substantially sinusoidal waveform that is in phase with the input AC current. The semiconductor switch provides a high frequency pulsating triangular current at the output of the rectifier.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: May 10, 2016
    Inventors: Praveen K. Jain, John Lam
  • Patent number: 9312780
    Abstract: A converter to which an alternating current is inputted from an AC power supply rectifies the alternating current to output it to a DC link. An inverter is connected through the DC link to the converter and converts a direct current into an alternating current to output it to a load. A leakage current detector outputs a detection current corresponding to a leakage current leaking from the load. A compensating current output end is connected to a location where the leakage current leaks, and outputs a compensating current compensating for the leakage current in response to the detection current. A switch sets whether to input the detection current to the compensating current output section or not.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: April 12, 2016
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventor: Yasutaka Taguchi
  • Patent number: 9281738
    Abstract: A power conversion circuit comprises an AC source, a power conversion unit, a filter inductor unit and a common mode noise suppression circuit. The power conversion unit has DC terminals and AC terminals. The filter inductor unit has first and second terminals, being respectively connected to the AC source and the AC terminals of the power conversion unit. The common mode noise suppression circuit has a capacitive impedance network with first and second terminals, and an impedance balancing network with first and second terminals. The second terminals of the capacitive impedance network are connected to the first terminals of the impedance balancing network, the first terminals of the capacitive impedance network are connected to the first terminals of the filter inductor unit, and the second terminals of the impedance balancing network are connected to the DC terminals of the power conversion unit.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: March 8, 2016
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Jinping Zhou, Min Zhou, Yicong Xie
  • Patent number: 9257909
    Abstract: A switching power supply determines the order n (a natural number) of the power supply higher harmonic component near the receiving frequency fc of an AM radio broadcast, and judges whether the higher harmonic component of the order n is higher or lower than the receiving frequency fc of the AM radio broadcast. According to the judgment result, the switching power supply determines an upper limit value and a lower limit value for the power supply frequency fs that does not interfere with the receiving frequency fc of the AM radio broadcast from the values of the fundamental power supply frequency fso of the switching operation, the order n of the higher harmonic component, the receiving frequency fc of the AM radio broadcast, and the bandwidth BW of the receiving frequency. The power supply frequency fs is set within the range specified by the upper and lower limit values.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: February 9, 2016
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Kenichi Nishijima
  • Patent number: 9249518
    Abstract: A system for distributing medium to high voltage AC electric power from a wind farm to electrolyzer modules requiring DC power. The system includes one or more of each of a central step down n-pulse transformer, a non-regulated n-pulse rectifier, a regulated n-pulse chopper type DC-DC converter, respective electrolyzer module controllers, a dispatch controller, an alternative load, and an alternative power source.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: February 2, 2016
    Assignee: Next Hydrogen Corporation
    Inventors: Jim Hinatsu, Michael Stemp, Philipp Andres, William Stewart
  • Patent number: 9246326
    Abstract: The invention concerns a method and a system for online ferroresonance detection in a high voltage electrical distribution network. The method includes: Overflux detection (23), which acts as the start element, overflux being set if the flux is greater than a threshold for specified time duration, mode verification (26) which is to recognize the modes of the ferroresonance, a fuzzy logic method being used to discriminate the ferroresonance modes.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: January 26, 2016
    Assignees: ALSTOM TECHNOLOGY LTD., TSINGHUA UNIVERSITY
    Inventors: Xinzhou Dong, Xuyang Li, Zhiqian Bo, Ray Chatfield, Andrzej Klimek
  • Patent number: 9235227
    Abstract: A power converter includes a plurality of switches that interconnect first and second input terminals of the power converter with first and second output terminals of the power converter. The switches are switched to convert power from the input terminals to the output terminals. During the switching, voltage spikes are mitigated by a first RLC branch connected from the first input terminal to the first output terminal and by a second RLC branch connected from the second input terminal to the second output terminal.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: January 12, 2016
    Assignee: General Electric Company
    Inventors: Alvaro Jorge Mari Curbelo, Ajith Kuttannair Kumar, Henry Todd Young, Jason Daniel Kuttenkuler, Sebastian Pedro Rosado
  • Patent number: 9225231
    Abstract: A direct current (DC)-DC converter, which includes an open loop ripple cancellation circuit, a switching supply, and a parallel amplifier, is disclosed. During a calibration mode, the parallel amplifier provides a parallel amplifier output current to regulate a power supply output voltage based on a calibration setpoint. The switching supply drives the parallel amplifier output current toward zero using a switching control signal, such that during the calibration mode, an estimate of a current gain is based on the switching control signal. Further, during the calibration mode, the open loop ripple cancellation circuit is disabled. During a normal operation mode, the open loop ripple cancellation circuit provides a ripple cancellation current, which is based on the estimate of the current gain.
    Type: Grant
    Filed: September 16, 2013
    Date of Patent: December 29, 2015
    Assignee: RF Micro Devices, Inc.
    Inventors: Philippe Gorisse, Nadim Khlat, Christopher Truong Ngo
  • Patent number: 9214857
    Abstract: An apparatus and system comprise a noise cancelation power converter being configured for phase inverted synchronous operation with respect to a primary power converter. The primary power converter is operable to supply power to at least one device. The primary power converter produces a first electromagnetic interference during operation to supply the power. The first electromagnetic interference is coupleable to the device. The noise cancelation power converter further is configured with parasitic components substantially matching parasitic components of the primary power converter. The noise cancelation power converter further produces a second electromagnetic interference that is coupleable to the device.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: December 15, 2015
    Inventor: Takashi Kanamori
  • Patent number: 9178410
    Abstract: A power converter includes a plurality of switches electrically coupled to each other for converting input power to output power. Each of the switches is sufficiently isolated to protect adjacent switches upon failure of one or more switches. The power converter also includes a controller for reconfiguring operation of the switches to provide at least a partial operating mode upon a switch failure.
    Type: Grant
    Filed: January 6, 2012
    Date of Patent: November 3, 2015
    Assignee: General Electric Company
    Inventors: Owen Jannis Samuel Schelenz, David Smith
  • Patent number: 9178500
    Abstract: A pulse generator system and method, including an inductive storage device configured to perform a charging process using a high current received from a first power supply; and a switch that is powered by a second power supply and configured to receive a step signal through a gate driver for controlling a repetition rate of the inductive storage device charging process and a pulse repetition frequency (PRF) of an output pulse.
    Type: Grant
    Filed: January 18, 2012
    Date of Patent: November 3, 2015
    Assignee: Lockheed Martin Corporation
    Inventors: Raymond A. de Jesus, J. Patrick Roney, Joshua Wiehn
  • Patent number: 9172299
    Abstract: The invention provides a digital active EMI filter that removes, minimizes, or reduces unwanted interference (i.e., EMI noise) generated by a power circuit such as, for example, a power converter. Digital active filtering includes digital sampling of the incident noise signal amplitude and frequency, discrete time conversion of the EMI noise source, processing (e.g., inverting) the digital signal, and then constructing an analog output signal (i.e., an EMI compensation signal) which is injected to the input of the power circuit. A digital EMI filter as described herein may be used in both differential-mode and common-mode configurations, and overcomes limitations of passive and active analog EMI filters.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: October 27, 2015
    Assignee: SPARQ Systems Inc.
    Inventors: Djilali Hamza, Praveen K. Jain