With Harmonic Filter Or Neutralizer Patents (Class 307/105)
  • Patent number: 10658919
    Abstract: Embodiments of the invention provide for a system, method, and controller for operating a harmonic regulator with loop delay compensation. Some embodiments include receiving, at a controller, voltage feedback from a power system, and applying a harmonic regulator to each distortion frequency to be compensated. Embodiments also include applying a predetermined delay to an output of the harmonic regulator, scaling the delayed output and adding it to a power source voltage reference waveform, and providing condition power to a load, using the conditioned power source voltage reference waveform.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: May 19, 2020
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Ernest Thompson, Adam Michael White
  • Patent number: 10594227
    Abstract: A matrix converter system having a current control mode operation is provided. The system includes a matrix converter having a switching matrix. The matrix converter is coupled at its low-voltage side to a generator and at its output load side to a load. A controller having a pulse width modulation (PWM) control circuit is configured to control the matrix converter via its switching matrix to increase energy within the internal inductances of the generator when the switching matrix causes a short circuit. A feed forward calculator is configured to calculate a feed forward output phase angle. The feed forward output phase angle is an estimation of an angle between an output current vector and an output voltage vector that represent feedback signals of current and voltage output by the matrix converter.
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: March 17, 2020
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Vladimir Blasko
  • Patent number: 10587213
    Abstract: A motor drive apparatus includes a converter configured to convert AC power inputted by an AC power supply to DC power and to output the same to a DC link, a DC link capacitor provided for the DC link, an inverter configured to convert the DC power in the DC link to AC power for driving a motor and to output the AC power, a DC voltage detection unit configured to detect a value of DC voltage applied across the DC link capacitor, an AC voltage detection unit configured to detect a peak value of AC voltage on an AC input side of the converter, and a leakage current detection unit configured to detect a leakage current caused by driving the motor, based on the value of DC voltage detected by the DC voltage detection unit and the peak value of AC voltage detected by the AC voltage detection unit.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: March 10, 2020
    Assignee: FANUC CORPORATION
    Inventors: Masaya Tateda, Yasuyuki Matsumoto
  • Patent number: 10581368
    Abstract: The present invention relates to a surge suppression circuit connected between an output end of an inverter INV and a cable 100 to drive a motor M that is connected to the output end of the inverter INV via the cable 100, and relates to a motor drive system in which the surge suppression circuit is used. The surge suppression circuit 300 includes an inductance L and a resistor R connected in parallel with the inductance L. The resistor R is set so as to match, or so as to be less than, an impedance of zero-phase component of the cable 100. A surge suppression circuit and an inverter drive motor system are enabled to be applied to a low-voltage small-capacity inverter with no DC voltage neutral terminal, and enabled to reduce the zero-component of the surge voltage according to the connection to the output end of the inverter.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: March 3, 2020
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Miwako Fujita
  • Patent number: 10574086
    Abstract: A control system and hardware with a controllable input relay provides two different modes of operation—uninterruptable power supply (UPS) and mixed energy-AC support. For each operation mode, regulation of the DC-Link and neutral point balancing is guaranteed even for non-linear unsymmetrical AC loads. Moreover, in the mixed energy-AC support mode, unity power factor operation of AC input source, seamless zero current crossing, and very low total harmonic distortion (THD) is provided by the applied non-linear control algorithm. The system has a higher efficiency in comparison to other AC-DC-AC converters with smaller size and weight because of the elimination of the typical balancing circuit.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: February 25, 2020
    Assignee: RHOMBUS ENERGY SOLUTIONS, INC.
    Inventors: Hamid Reza Teymour Ghasemabadi, Gholamreza Esmalli
  • Patent number: 10574136
    Abstract: Current source rectifiers (CSR) and methods for a power source including three phase lines are provided herein. The CSR includes a rectifier having a plurality of switches, each switch of the plurality of switches coupled to an associated phase line of the three phase lines. The rectifier operable to receive an alternating current (AC) input voltage and provide a direct current (DC) output voltage. The CSR also includes a controller configured to control operation of the switches in accordance with a first switching sequence when measured input voltages on at least two phase lines of the three phase lines are outside of a predetermined voltage range, and control operation of the switches in accordance with a second switching sequence when the measured input voltages on the at least two phase lines are within the predetermined voltage range.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: February 25, 2020
    Assignee: ABB Schweiz AG
    Inventor: Lorenzo Giuntini
  • Patent number: 10560019
    Abstract: An aircraft bipolar high-voltage network includes a DC voltage converter comprising two unipolar input connections, two bipolar output connections and a reference potential connection, and at least one unipolar device having two electrical connections which are each coupled to one of the two unipolar input connections. The DC voltage converter has a first DC voltage converter module coupled to a first of the unipolar input connections via a module input connection, to the reference potential connection via a module reference potential connection and to a first of the bipolar output connections via a module output connection, and a second DC voltage converter module coupled to a second of the unipolar input connections via a module input connection, to the reference potential connection via a module reference potential connection and to a second of the bipolar output connections via a module output connection.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: February 11, 2020
    Assignee: Airbus Operations GmbH
    Inventors: Alexander Kaiser, Joerg Wangemann, Hauke-Peer Luedders
  • Patent number: 10554117
    Abstract: The invention relates to an electric converter (30) for a substation feeding an electric grid and/or for recuperating the braking energy of rail vehicles traveling on a railroad track, the substation being connected to a feeder line able to supply a DC voltage to the rail vehicles traveling on the railroad track, the substation comprising an electricity distribution grid able to deliver a corresponding three-phase voltage with three phases, the converter (30) comprising a transformer (306) able to inspect the value of the three-phase voltage delivered by the electricity distribution grid, a filtering device (304) able to filter the three-phase voltage of the transformer (306), and an inverter (302) connected to the filter (304).
    Type: Grant
    Filed: January 14, 2016
    Date of Patent: February 4, 2020
    Assignee: ALSTOM TRANSPORT TECHNOLOGIES
    Inventors: Johnny Bou-Saada, Jérôme Sadoun, Jonathan Scottini
  • Patent number: 10543553
    Abstract: A welding assembly and method is described which includes a charging circuit and regulator coupled to an input power source; an energy storage element connected in parallel with the charging circuit and regulator to increase the weld current output, wherein the energy storage element is charged by the charging circuit and regulator; and a weld output controller connected in parallel with the energy storage element for controlling a welding arc between an electrode and a workpiece, wherein the weld output controller includes a forward converter/inverter including a series circuit of a primary winding of a transformer, and a switching element which is coupled to the energy storage element, and a rectifier smoothing circuit which rectifies and smoothes a voltage induced in a secondary winding of the transformer according to a switching operation of the switching element, wherein the rectifier smoothing circuit conducts during an ON period of the switching element.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: January 28, 2020
    Assignee: LINCOLN GLOBAL, INC.
    Inventor: James J. O'Connor
  • Patent number: 10523049
    Abstract: An uninterruptible power supply apparatus supplies AC power from any one of a first inverter of a first power conversion device and a second inverter of a second power conversion device to a load, and when this inverter has a malfunction, the uninterruptible power supply apparatus supplies the AC power from the other inverter to the load. When a DC voltage provided to the second inverter is higher than a lower limit voltage, the second power conversion device outputs an AC voltage having a sinusoidal waveform and falling within an acceptable input voltage range of the load, and when the DC voltage is lower than the lower limit voltage, the second power conversion device outputs an AC voltage having waveform distortion within a range acceptable to the load and falling within the acceptable input voltage range of the load.
    Type: Grant
    Filed: December 25, 2014
    Date of Patent: December 31, 2019
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventor: Masaru Toyoda
  • Patent number: 10483902
    Abstract: A current regulator for a motor controller reduces distortion of the current output to a motor. Feedback signals corresponding to the current present on the motor are transformed into a fundamental and a harmonic reference frame. Notch filters in each reference frame attenuate components of the current feedback signal from the other reference frame. Current regulators in each reference frame receive the filtered current feedback signal in the corresponding reference frame and generate an output signal that is used to regulate the output current to the motor to the desired level of current in the corresponding reference frame. The output signal from the regulator in the harmonic reference frame is transformed to the fundamental reference frame, and the output of the two regulators are combined in a common reference frame to generate a reference signal corresponding to the required voltage output to the motor to achieve desired operation.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: November 19, 2019
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Gennadi Sizov, Ahmed S. Mohamed Sayed Ahmed
  • Patent number: 10444293
    Abstract: A battery voltage measurement circuit measures voltages at a plurality of rechargeable batteries. The rechargeable batteries are connected to a flying capacitor via input-side semiconductor switches. The capacitor is connected to inverting input terminals of first and second differential amplification circuits. Output terminals of the differential amplification circuits are directly or indirectly connected to a calculation unit that calculates voltages at the rechargeable batteries. The output terminal and the inverting input terminal of each differential amplification circuit are connected via a corresponding sub-capacitor. Each differential amplification circuit includes a non-inverting input terminal connected to a reference potential. The negative electrode of the rechargeable battery is connected to the reference potential via a leakage detection circuit.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: October 15, 2019
    Assignee: PRIMEARTH EV ENERGY CO., LTD.
    Inventors: Yusuke Kozuka, Mitsuhiro Kamo
  • Patent number: 10439506
    Abstract: An electric converter system including modules nested inside one another which have at least two levels of nesting is disclosed. At least one embedded module of a first nesting level is provided, which includes at least two electrical connections and a power train. The power train includes at least two embedded modules nested with each other of an at least second next lower nesting level, such that the modules are embedded inside one another. Each of the modules has switching elements for dynamically switching between switch states between at least two modules of a nesting level. A method for providing an electrical converter system is also disclosed.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: October 8, 2019
    Assignee: Dr. Ing. h.c. F. Porsche Aktiengesellschaft
    Inventor: Stefan Götz
  • Patent number: 10411624
    Abstract: The present application is directed to a method and apparatus operable to damp reflected voltage transients in an electric motor drive system. The system includes an inverter, an electrical cable having at least one conducting cable connected to the inverter, and an electric motor connected to the electrical cable. An inner shield is disposed along a length of the at least one conducting cable. A ground line is operable for connecting the inner shield to a ground location through a resistor connected in series therewith.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: September 10, 2019
    Assignee: ABB Schweiz AG
    Inventors: Joseph von Sebo, Peter M. Stipan, Trevor E. Deacon
  • Patent number: 10348229
    Abstract: A current controller is provided having a positive sequence controller and a negative sequence controller, where error signals operated on by the positive sequence controller are transformed into a negative sequence reference frame and input to the negative sequence controller. A current controller is also provided having a positive sequence controller, a negative sequence controller, and one or more delay state feedbacks to counter control loop delays, where the delay state feedbacks provide high bandwidth, low current overshoot, small current rise time and good current stability margins. A current controller is also disclosed having a positive sequence controller, a negative sequence controller, and one or more cross coupled gains between a d-axis and a q-axis, where the cross coupled gains are proportional to the speed of a motor associated with the current controller.
    Type: Grant
    Filed: August 13, 2015
    Date of Patent: July 9, 2019
    Assignee: ELECTRO STANDARDS LABORATORIES
    Inventors: Raymond B Sepe, Jr., Steven Bastien
  • Patent number: 10340733
    Abstract: A common mode choke in a 3-wire transformer free UPS system with which different rectifier and bypass power sources are used is eliminated by using different types of PWM control depending on whether the inverter is paralleled with the bypass power source. When the inverter is paralleled with the bypass power source, a type of PWM control is used that does not have common mode voltage injection. When the inverter is not paralleled with the bypass power source, a type of PWM control is used that has common mode voltage injection. In an aspect, the PWM control that does not have common mode voltage injection is sine-triangle PWM and the PWM control that has common mode voltage injection is space-vector PWM.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: July 2, 2019
    Assignee: Vertiv Corporation
    Inventors: Edwin Shires, Terry D. Bush, Brian P. Heber, Charles F. Blair
  • Patent number: 10312881
    Abstract: In some embodiments, the instant invention provides a drive filter that includes: a plurality of input contacts configured for receiving an initial three-phase alternative current from a three-phase alternative current power source; a plurality of output contacts configured for outputting an output current to a respective phase of an adjustable speed drive, where the adjustable speed drive has a direct current bus capacitance between 1 and 30 microfarads (uF); and a plurality of electrical connections, where each electrical connection is configured to connect each input contact of the plurality of input contacts to a respective output contact of the plurality of output contacts; and where each electrical connection consists of at least one line capacitor; and where the at least one capacitor has a capacitance value such that a total harmonic current distortion (THID) of the output current is reduced to 5 percent or less.
    Type: Grant
    Filed: January 17, 2017
    Date of Patent: June 4, 2019
    Assignee: MTE Corporation
    Inventors: Todd Shudarek, Tin Luu
  • Patent number: 10302719
    Abstract: The present invention provides a gradient amplifier (300) for a magnetic resonance imaging system, comprising: a power amplifier (310) configured to supply a gradient coil current to a gradient coil (330); a passive filter (320) oupled to the power amplifier and configured to damp a harmonic component of the gradient coil current, wherein an oscillation current caused by oscillation of the passive filter (320) is present in the gradient coil current; and an active power filter coupled between the passive filter and the gradient coil and configured to generate a compensation current to compensate the oscillation current.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: May 28, 2019
    Assignee: Koninklijke Philips N.V.
    Inventor: Yingfeng Lin
  • Patent number: 10242826
    Abstract: An electric power distribution switchgear is connected between an electric power grid and an electric power equipment. The switchgear includes a synchronized vacuum switching apparatus configured to break the current to the electric power equipment using a synchronized technique to avoid re-ignition during the breaking and thus any transients caused by such re-ignition; and a surge arrester arrangement connected to the electric power equipment, the surge arrester arrangement being designed and configured to only handle transients caused by the current chopping at the breaking. The surge arrester arrangement can be arranged remote from the electric power equipment, such as e.g. in the same casing as the synchronized vacuum switching apparatus.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: March 26, 2019
    Assignee: ABB Schweiz AG
    Inventors: Elisabeth Lindell, Lars Liljestrand, Stefan Halén
  • Patent number: 10238014
    Abstract: The present disclosure relates to converters. Embodiments of the teachings herein may be employed for converting an input voltage present between two input terminals into an alternating voltage with a prespecified amplitude and frequency for the activation of a single or multiphase load. For example, a converter may include: at least two submodules of an inverter arm connected in series with one another and a heat sink. Each of the submodules may include: a circuit carrier; at least two controllable switching elements electrically connected on the circuit carrier; and a first and a second terminal. The first main terminals of the controllable switching elements may be connected thermally to a cooling surface of the heat sink. The heat sink may include a number of heat sink parts electrically insulated from one another. An electrical connection of the second submodule terminal of the first submodule to the first submodule terminal of the second submodule may include a respective assigned heat sink part.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: March 19, 2019
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Martin Schulz
  • Patent number: 10224854
    Abstract: Methods and systems are provided to damp oscillations in a synchronous alternating current (AC) grid. Current may be received from the synchronous AC grid through a phase of an n-phase supply line. The current received from the synchronous AC grid is supplied to a phase of the synchronous motor. A sub-harmonic oscillation may be detected in the current received from the synchronous AC grid. The sub-harmonic oscillation may be damped by: shunting a portion of the current away from the phase of the synchronous motor during a first time period in an upper-half of the sub-harmonic oscillation, and/or supplying compensation current from a partial power converter to the phase of the synchronous motor during a second time period in a lower-half of the sub-harmonic oscillation.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: March 5, 2019
    Assignee: ROLLS-ROYCE NORTH AMERICAN TECHNOLOGIES INC.
    Inventors: Mark Jon Blackwelder, Paul M. Rancuret
  • Patent number: 10218287
    Abstract: A power conversion device includes a single phase full-bridge rectification circuit, a reactor being connected to a power source in series between one of input terminals of the single phase full-bridge rectification circuit and the power source, capacitors being connected to each other in series via a connection point between output terminals of the single phase full-bridge rectification circuit, a first switch connected between the input terminal and the connection point, and a second switch connected between the input terminals.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: February 26, 2019
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Toshiaki Satou, Junya Mitsui
  • Patent number: 10193383
    Abstract: The dual-shaft gas turbine power generation system includes: a high-pressure gas turbine; a first rotating shaft connecting a compressor and the high-pressure gas turbine; an electric motor connected to the first rotating shaft; a governor which adjusts the amount of air taken into the compressor; a low-pressure gas turbine; a second rotating shaft connected to the low-pressure gas turbine; a synchronous power generator connected to the second rotating shaft; a frequency converter which converts the frequency of power transmitted between the synchronous power generator and the electric motor; and a control device which controls a frequency converter control device for controlling the frequency converter, and the governor, on the basis of a power output command value indicating the power to be outputted to an external grid.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: January 29, 2019
    Assignee: Hitachi, Ltd.
    Inventors: Noriaki Hino, Naohiro Kusumi, Kazuo Takahashi, Tomomichi Ito
  • Patent number: 10164553
    Abstract: A method for reducing lower order harmonics of a power converter includes, for each phase leg of the converter: obtaining a voltage reference for the phase leg; for a present sample, obtaining a flux error of the output voltage of the leg; dividing the first sample flux error by a time period to obtain an average voltage error over said time period; subtracting an obtained processed average voltage error, based on the average voltage error, from the voltage reference to obtain a modified voltage reference for the phase leg; and providing the modified voltage reference to a modulation unit of the converter for controlling the phase leg.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: December 25, 2018
    Assignee: ABB SCHWEIZ AG
    Inventors: Aravind Mohanaveeramani, Jean-Philippe Hasler, Suman Maiti
  • Patent number: 10158314
    Abstract: Disclosed examples include power conversion systems and methods to operate an inverter to drive a motor load through an intervening output filter, a transformer and a cable, including a current regulator to compute a command value according to a current reference value and a motor current feedback value, a cross-coupled feedforward component to compensate the command value by an estimated cross-coupled voltage value to compute a control output value, a cross-coupled object component to compute the motor current feedback value according to a voltage value using a plant transfer function representing the output filter, the transformer, the cable and the motor load, and a controller to provide the inverter switching control signals to control the inverter according to the control output value.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: December 18, 2018
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Semyon Royak, Jingya Dai, Thomas A. Nondahl, Jingbo Liu, Robert J. Breitzmann, Peter B. Schmidt
  • Patent number: 10148169
    Abstract: A circuit includes a bridgeless flyback converter having a primary side electromagnetically coupled to a secondary side by a transformer, the primary side being devoid of a diode bridge rectifier, an input capacitor coupled to the primary side of the bridgeless flyback converter, an output capacitor coupled to the secondary side of the bridgeless flyback converter, an EMI (electromagnetic interference) filter coupled between an AC input and the input capacitor, and a compensation stage coupled in parallel with the output capacitor and including a storage capacitor. The input capacitor has a capacitance such that the compensation stage filters the AC mains frequency ripple of the AC input from the secondary side. The compensation stage is configured to store energy in the storage capacitor and regulate the voltage across the output capacitor. The bridgeless flyback converter is configured to regulate the voltage across the storage capacitor.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: December 4, 2018
    Assignee: Infineon Technologies Austria AG
    Inventors: Nico Fontana, Kennith Kin Leong, Anders Soren Lind, Eric G. Persson
  • Patent number: 10139848
    Abstract: A system includes a power source, a power converter, a leakage current cancelation circuit, a load, and a ground node. The power converter is coupled to the power source and supplies the load. During operation of the power converter, a common mode current flows from the load to the ground node via a leakage capacitance. The leakage current cancelation circuit receives at least one signal indicative of the common mode current and generates a leakage cancelation current that is injected into at least one node of the system. The leakage cancelation current has a magnitude opposite a magnitude of the common mode current. For example, the leakage current cancelation circuit receives supply voltage signals output by the power converter, and generates and supplies the leakage cancelation current onto input nodes of the power converter such that a current level on the ground node is between ?3.0 milliamperes and +3.0 milliamperes.
    Type: Grant
    Filed: June 1, 2017
    Date of Patent: November 27, 2018
    Assignee: Motiv Power Systems, Inc.
    Inventors: William Treichler, James Michael Castelaz, Grayson Zulauf
  • Patent number: 10135352
    Abstract: The present disclosure provides a controller for a power converter that converts input power to a prescribed form and outputs the power by switching a semiconductor switching device ON and OFF and that has an output circuit including a filtering reactor on an output side, the controller including: a carrier calculating unit that generates a carrier having prescribed frequencies for generating a control signal that switches the semiconductor switching device ON and OFF, wherein the carrier calculating unit generates the carrier such that a carrier frequency at phase angles where ripple components in a current flowing through the reactor are relatively high in magnitude, which is defined as a high ripple carrier frequency, is higher than a carrier frequency at phase angles where the ripple components are relatively low in magnitude, which is defined as a low ripple carrier frequency.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: November 20, 2018
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Kansuke Fujii
  • Patent number: 10135329
    Abstract: The disclosure discloses a virtual impedance comprehensive control method for an inductive power filtering (IPF) system. According to the disclosure, harmonic damping control at grid side and zero impedance control of filters are organically combined according to a technical problem which is unsolved and process difficulty in equipment manufacturing in an existing filtering method, so that the problem of performance reduction of passive filtering equipment caused by a change in an impedance parameter of a power grid system is solved on one hand, optimization control over a quality factor of the passive filtering equipment may be implemented to reduce dependence on an equipment production process level on the other hand, a quality factor of the single-tuned filters may meet a design requirement, and an overall filtering characteristic is further improved.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: November 20, 2018
    Assignee: HUNAN UNIVERSITY
    Inventors: Yong Li, Qianyi Liu, Sijia Hu, Longfu Luo, Yijia Cao
  • Patent number: 10122285
    Abstract: An AC/DC conversion apparatus includes first, second, and third AC/DC conversion modules operated by a controller in two modes of operation. In the first mode, the input AC signal is 3-phase and each of the three modules are enabled to handle a respective one of the input phases. In the second mode, the input AC signal is single phase and the first and second modules are enabled to deliver output power based on the single-phase AC input, while the controller actuates an H-bridge switches in the third module to which active filter circuitry is connected, to reduce an AC component in the output signal. The active filter circuitry can be selectively connected to the H-bridge switches when single-phase operation is desired, which circuitry may be disposed in a filter housing having male electrical terminals that cooperate with corresponding female terminals associated with the third module.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: November 6, 2018
    Assignee: HELLA GmbH & Co. KGaA
    Inventors: Juncheng Lu, Hua Bai
  • Patent number: 10090762
    Abstract: A direct current (DC) voltage converter configured to transition between operation modes is disclosed. A voltage selection circuitry is provided in a DC voltage conversion circuit to control a buck-boost converter that generates a DC output voltage. As opposed to conventional methods of switching the buck-boost converter between a buck mode and a boost mode based on a single switching threshold, the voltage selection circuitry is configured to switch the buck-boost converter between the buck mode and the boost mode based on multiple voltage thresholds. Each of the multiple voltage thresholds defines a respective range for the DC output voltage. By controlling the buck-boost converter based on multiple voltage thresholds, it is possible to provide a smoother transition between the buck mode and the boost mode, thus reducing voltage errors in the DC output voltage and improving reliability of the DC voltage conversion circuit.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: October 2, 2018
    Assignee: Qorvo US, Inc.
    Inventors: Mohammad Ahsanul Adeeb, Philippe Gorisse, Nadim Khlat, Michael R. Kay
  • Patent number: 10090680
    Abstract: Provided is an apparatus for delivering electrical power, in particular for delivering regeneratively produced electrical power, which has at least one converter and at least one filter for matching the delivery of power by the converter to a load impedance. Also provided is a method for operating the apparatus for delivering electrical power which allows improved monitoring of the functioning of the filters or mains filters and which uses means for determining at least one filter current in at least one filter, which means are designed in such a manner that said means make it possible to determine the at least one filter current during operation of the apparatus. Comparison means are provided and generate an error information signal using the desired value and actual value of the filter current and a predefinable error criterion.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: October 2, 2018
    Assignee: Woodward Kempen GmbH
    Inventors: Dirk Volker Leiting, Jörg Kretschmann, Jan van Leyen, Stephan Engelhardt
  • Patent number: 10069444
    Abstract: A motor control apparatus includes a PWM rectifier which converts AC power on a three-phase AC input power supply side into DC power or which converts DC power on a DC output side into AC power, a smoothing capacitor which is connected to a DC link on the DC output side of the PWM rectifier, a DC voltage detection unit which detects a DC voltage of the smoothing capacitor, an LCL filter which is connected to the AC input power supply side of the PWM rectifier, a power disconnection unit which is connected to an AC power supply side of the LCL filter, and a control unit which applies, when power is disconnected by the power disconnection unit, electric current to the LCL filter by controlling the PWM rectifier, and lowers the DC voltage to a desired value by discharging energy stored in the smoothing capacitor.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: September 4, 2018
    Assignee: FANUC CORPORATION
    Inventor: Masakazu Niwa
  • Patent number: 10063179
    Abstract: As described herein, a drive circuit for a three phase AC motor comprises an AC/AC converter. The converter has an input for receiving multiphase AC power from an AC source and converting the AC power to variable voltage and variable frequency from the AC source for driving the AC motor. A filter circuit is connected to the AC/AC converter and comprises at least one inductor per phase and at least one capacitor per phase. The capacitors are connected in a broken wye configuration with one side connected to one of the inductors and an opposite side connected via a three phase diode bridge rectifier to a switch. The switch is controlled by a converter control to selectively open or short a neutral point of the broken wye capacitor configuration.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: August 28, 2018
    Assignee: Yaskawa America, Inc.
    Inventor: Mahesh M. Swamy
  • Patent number: 10063142
    Abstract: An aircraft bipolar high-voltage network includes a DC voltage converter comprising two unipolar input connections, two bipolar output connections and a reference potential connection, and at least one unipolar device having two electrical connections which are each coupled to one of the two unipolar input connections. The DC voltage converter has a first DC voltage converter module coupled to a first of the unipolar input connections via a module input connection, to the reference potential connection via a module reference potential connection and to a first of the bipolar output connections via a module output connection, and a second DC voltage converter module coupled to a second of the unipolar input connections via a module input connection, to the reference potential connection via a module reference potential connection and to a second of the bipolar output connections via a module output connection.
    Type: Grant
    Filed: February 19, 2015
    Date of Patent: August 28, 2018
    Assignee: Airbus Operations GmbH
    Inventors: Alexander Kaiser, Joerg Wangemann, Hauke-Peer Luedders
  • Patent number: 10050603
    Abstract: A frequency tunable filter and an associated apparatus are provided, where the frequency tunable filter may include a plurality of ports including an input port and an output port, and may further include an inductor-capacitor (LC) resonator, a switching unit that is coupled between the LC resonator and a ground terminal of the frequency tunable filter, and a resonance adjustment unit that is coupled between the LC resonator and the ground terminal. For example, the LC resonator may include a first terminal coupled to each of the input port and the output port, and may further include a second terminal, the switching unit may selectively provide a conduction path between the second terminal of the LC resonator and the ground terminal, and the resonance adjustment unit may selectively change a resonance characteristic of the LC resonator.
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: August 14, 2018
    Assignee: MediaTek Inc.
    Inventors: Chien-Cheng Lin, Jui-Chih Kao
  • Patent number: 10033315
    Abstract: The invention relates to a phase control loop for the rotational speed regulation of an electric generator fed by an internal combustion engine, having an input connection, which is designed to receive a rotational speed signal measured on a drive shaft of the electric generator, an amplitude determination device, which is coupled to the input connection and which is designed to determine the amplitude of rotational speed ripples of the measured rotational speed signal, a correction function device, which is coupled to the amplitude determination device and the input connection and which is designed to determine a rotational speed correction signal on the basis of the determined amplitude of the rotational speed ripple and of the measure rotational speed signal, a phase discriminator, which is coupled to the amplitude determination device and the correction function device and which is designed to determine a phase difference signal between the measured rotational speed signal and the rotational speed correct
    Type: Grant
    Filed: July 9, 2014
    Date of Patent: July 24, 2018
    Assignee: Robert Bosch GmbH
    Inventors: Bernd Spielmann, Martin Silberbauer, Meinrad Praxmarer, Milos Medvecky
  • Patent number: 10020724
    Abstract: A controller for determining the duty-ratio for a pulse width modulator of a converter includes an inner current loop, an outer voltage loop and a multiplier with an input voltage feed forward to connect both loops. A prediction unit determines a correction signal icor that is added to the reference current iref by means of an adder and it further determines a sample correction signal to correct the current samples in the current loop. This error-controlled duty-ratio prediction with sample correction results in an improved total harmonic distortion as well as in an improved power factor of the converter.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: July 10, 2018
    Assignee: DET INTERNATIONAL HOLDING LIMITED
    Inventors: Daniel Weida, Matthias Staehli
  • Patent number: 10014692
    Abstract: Embodiments include apparatuses, methods, and systems with cross-coupling noise reduction in circuits. In embodiments, a circuit may include a common inductor and a negatively coupled inductor pair connected or coupled between the first inductor and a first load and a second load. The negatively coupled inductor pair may include a first and a second inductor. The first inductor may be connected or coupled to the first load and the second inductor may be connected or coupled to the second load to reduce cross-coupling noise between the first load and the second load. Examples of passive structures that may be used to implement the circuit are also described. Other embodiments may also be described and claimed.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: July 3, 2018
    Assignee: Intel Corporation
    Inventors: Amit K. Jain, Sameer Shekhar
  • Patent number: 10003277
    Abstract: A power converter including a compressor as a load includes a compensation current output (80) allowing compensation current (Ic), which compensates for leakage current (Ia), to flow. A controller (50) receives a detection signal from a rotational speed sensor (55) which senses the rotational speed of the compressor (CM). When the rotational speed has increased to a set rotational speed at which the leakage current (Ia) is lower than or equal to its limiting value (Lmax) (e.g., the limiting value specified under the Electrical Appliances and Materials Safety Act or by the IEC) in a state where the compensation current output (80) is off, the compensation current output (80) is switched from an on state to an off state. This may reduce the leakage current from the compressor with low power loss.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: June 19, 2018
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Yasutaka Taguchi, Junya Mitsui, Akira Moriguchi
  • Patent number: 10003196
    Abstract: A distributed control node enables monitoring of complex energy signatures for local loads. The control node can identify energy signatures unique to local loads. The energy signature includes a complex current vector for the load in operation identifying the primary current with a real power component and a reactive power component, and identifying one or more harmonics each with a real power component, a reactive power component, and an angular displacement relative to the primary current. Based on the energy signature, the control node can control a noise contribution of the load due to the harmonics as seen at a point of common coupling to reduce noise introduced onto the grid network from the load.
    Type: Grant
    Filed: July 4, 2015
    Date of Patent: June 19, 2018
    Assignee: XSLENT Energy Technologies, LLC
    Inventors: Stefan Matan, Fred C Horton, Frank P Marrone
  • Patent number: 9973003
    Abstract: A method of designing a multiple-tuned filter (MTF) of a high voltage direct current (HVDC) system is provided. The method includes selecting an input parameter for the MTF, setting a resonance frequency of the MTF, calculating values of inductance (L) and capacitance (C) which are filter parameters of the MTF on the basis of the input parameter and the resonance frequency, combining a value of resistance (R) with the filter parameters and calculating a price according to the combination, and storing the combined values of R, L, and C when the calculated price falls within a predetermined price range.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: May 15, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Yi Kyung Chyun
  • Patent number: 9973107
    Abstract: A solution that intends to solve the problem of providing a single-stage bidirectional power conversion system (PCS) with a controllable power factor and the capability to regulate the current in the DC side. Disclosed is a single-stage, bidirectional and high-frequency isolated PCS, including a high-frequency transformer (HFT), a three-phase-to-single-phase matrix converter (MC), a full-bridge (FB) AC to DC converter, and a control system, where the control system outputs are connected to the switches of the MC and the FB converter. Moreover, the PCS output can also form a DC network for energy supply of several devices. This system converts three-phase AC power input from the network into DC power output that can be used for example to charge an energy storage device or supply a direct current distribution system. It is also possible to convert DC power input into AC power output to supply the network.
    Type: Grant
    Filed: August 11, 2015
    Date of Patent: May 15, 2018
    Assignee: Inesc Tec—Instituto de Engenharia de Sistemas
    Inventors: Diogo André Cerqueira Pinto Bezerra Varajão, Luís Miguel Faria Miranda, Rui Manuel Esteves Araújo
  • Patent number: 9973103
    Abstract: A power conversion system can be implemented to actively control a load while compensating for reactive power which may be sourced or consumed by an input filter circuit. In one aspect, the power conversion system can receive externally supplied multi-phase AC electric power, such as three-phase power from a power grid, and use a converter circuit to generate a DC bus. The power conversion system can then use an inverter circuit to generate multi-phase AC electric power from the DC bus for driving the load with adjustable frequencies and/or amplitudes as desired. The input filter circuit can be coupled to the converter circuit to filter out harmonics resulting from switching of the converter circuit. The power conversion system can receive feedback signals which may be used to determine reactive power sourced or consumed by the filter circuit, and can adjust the converter circuit to compensate for such reactive power.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: May 15, 2018
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Prathamesh R. Vadhavkar, Brian J. Seibel, Russel J. Kerkman
  • Patent number: 9973001
    Abstract: A zero sequence, fifth harmonic filter for reducing fifth harmonic distortion in a five-phase power distribution system includes five pairs of coils. Each coil has a first leg and a second leg and each pair of coils has a first coil and a second coil. The first leg of each of the first coils is connected to a corresponding phase of the power distribution system; one first leg to each of the five phases of the power distribution system. The first leg of each of the second coils is connected to a neutral of the power distribution system and the second leg of each of the first coils is connected to the second leg of a next second coil in a staggered fashion.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: May 15, 2018
    Inventor: Aleksandar B. Damjanovic
  • Patent number: 9973028
    Abstract: A charging system for use in providing power for charging a battery. The system includes a first, alternating-current-to-direct-current, stage and a second, direct-current-to-direct-current, stage. The first stage includes a single-phase diode rectifier for rectifying an input alternating-current input voltage, and a power-factor-correcting sub-circuit including a switch. The second stage includes multiple switches. The system further includes a high-frequency capacitor connected between the first stage and the second stage. The system also includes a controller connected to the switches of the first and second stages and configured to control, by way of the switches, timing of boost inductor current passing through the charging system.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: May 15, 2018
    Assignee: GM Global Technology Operations LLC
    Inventors: Chandra S. Namuduri, Rashmi Prasad
  • Patent number: 9966792
    Abstract: An uninterruptible power supply circuit is provided. The uninterruptible power supply circuit includes a first diode, a second diode, a bridge rectifier, and one or more electrical loads. The first diode, the second diode, the bridge rectifier, and the one or more electrical loads are electrically connected in the uninterruptible power supply circuit to drive the one or more electrical loads with a DC voltage or the intended AC supply voltage when the AC supply voltage is cutoff.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: May 8, 2018
    Inventor: Shivaling Shrishail Mahant Shetti
  • Patent number: 9953119
    Abstract: A method for designing a multiple tuned filter (MTF) in a high voltage direct current (HVDC) system includes setting an input parameter constituting the MTF; setting a resonance frequency of the MTF; extracting at least one LC combination case constituting the MTF on the basis of the input parameter and the resonance frequency; performing optimization for harmonic reduction on the LC combination case; and extracting an LC combination case determined based on a result obtained by performing the optimization.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: April 24, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Yi Kyung Chyun
  • Patent number: 9935561
    Abstract: A power supply unit (1) that is to be connected to different types of power supply networks includes an input (2) to receive AC power from the power supply network and an output (3) for providing power to an electrical device. The electrical device may for example be a computer, a telecom infrastructure device, inductive cooking/heating systems or an on-board charger of an electrical automotive vehicle. The power supply unit (1) includes at least two converters (4) that are connected between the inputs (2) and the output (3) and it further includes a controllable switching arrangement (5). The switching arrangement (5) includes a number of controllable switches (6) to controllably connect the converters (4) in different configurations to the input (2) and therefore also controllably to different supply lines of the power supply network.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: April 3, 2018
    Assignee: DET INTERNATIONAL HOLDING LIMITED
    Inventors: Peter Ide, Frank Schafmeister, Jörg Richter, Barzin Pour, Daniel Spesser, Dirk Herke
  • Patent number: 9929635
    Abstract: A leakage current suppression circuit is adapted for use with an AC-to-DC power supply that includes a bridge rectifier converting an AC input voltage into a DC voltage and outputting the DC voltage through a first output terminal and a grounded second output terminal thereof, a DC-to-DC converter converting the DC voltage into a predetermined DC output voltage and outputting the DC output voltage through a first output end and a grounded second output end thereof, and a capacitor coupled to the second output terminal of the bridge rectifier at one terminal thereof. The leakage current suppression circuit includes a first impedance unit and a second impedance unit each coupled in parallel between the other terminal of the capacitor and ground.
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: March 27, 2018
    Assignees: Lite-On Electronics (Guangzhou) Limited, Lite-On Technology Corp.
    Inventors: I-Chao Chiu, Yeh Guan