With Harmonic Filter Or Neutralizer Patents (Class 307/105)
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Patent number: 10242826Abstract: 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: GrantFiled: June 17, 2016Date of Patent: March 26, 2019Assignee: ABB Schweiz AGInventors: Elisabeth Lindell, Lars Liljestrand, Stefan Halén
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Patent number: 10238014Abstract: 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: GrantFiled: September 8, 2017Date of Patent: March 19, 2019Assignee: SIEMENS AKTIENGESELLSCHAFTInventor: Martin Schulz
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Patent number: 10224854Abstract: 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: GrantFiled: December 1, 2016Date of Patent: March 5, 2019Assignee: ROLLS-ROYCE NORTH AMERICAN TECHNOLOGIES INC.Inventors: Mark Jon Blackwelder, Paul M. Rancuret
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Patent number: 10218287Abstract: 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: GrantFiled: December 6, 2016Date of Patent: February 26, 2019Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Toshiaki Satou, Junya Mitsui
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Patent number: 10193383Abstract: 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: GrantFiled: November 4, 2016Date of Patent: January 29, 2019Assignee: Hitachi, Ltd.Inventors: Noriaki Hino, Naohiro Kusumi, Kazuo Takahashi, Tomomichi Ito
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Patent number: 10164553Abstract: 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: GrantFiled: April 1, 2015Date of Patent: December 25, 2018Assignee: ABB SCHWEIZ AGInventors: Aravind Mohanaveeramani, Jean-Philippe Hasler, Suman Maiti
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Patent number: 10158314Abstract: 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: GrantFiled: February 1, 2017Date of Patent: December 18, 2018Assignee: Rockwell Automation Technologies, Inc.Inventors: Semyon Royak, Jingya Dai, Thomas A. Nondahl, Jingbo Liu, Robert J. Breitzmann, Peter B. Schmidt
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Patent number: 10148169Abstract: 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: GrantFiled: November 23, 2016Date of Patent: December 4, 2018Assignee: Infineon Technologies Austria AGInventors: Nico Fontana, Kennith Kin Leong, Anders Soren Lind, Eric G. Persson
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Patent number: 10139848Abstract: 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: GrantFiled: June 1, 2017Date of Patent: November 27, 2018Assignee: Motiv Power Systems, Inc.Inventors: William Treichler, James Michael Castelaz, Grayson Zulauf
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Patent number: 10135329Abstract: 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: GrantFiled: September 13, 2016Date of Patent: November 20, 2018Assignee: HUNAN UNIVERSITYInventors: Yong Li, Qianyi Liu, Sijia Hu, Longfu Luo, Yijia Cao
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Patent number: 10135352Abstract: 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: GrantFiled: March 7, 2016Date of Patent: November 20, 2018Assignee: FUJI ELECTRIC CO., LTD.Inventor: Kansuke Fujii
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Patent number: 10122285Abstract: 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: GrantFiled: June 30, 2017Date of Patent: November 6, 2018Assignee: HELLA GmbH & Co. KGaAInventors: Juncheng Lu, Hua Bai
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Patent number: 10090762Abstract: 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: GrantFiled: August 20, 2015Date of Patent: October 2, 2018Assignee: Qorvo US, Inc.Inventors: Mohammad Ahsanul Adeeb, Philippe Gorisse, Nadim Khlat, Michael R. Kay
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Patent number: 10090680Abstract: 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: GrantFiled: August 4, 2017Date of Patent: October 2, 2018Assignee: Woodward Kempen GmbHInventors: Dirk Volker Leiting, Jörg Kretschmann, Jan van Leyen, Stephan Engelhardt
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Patent number: 10069444Abstract: 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: GrantFiled: October 1, 2015Date of Patent: September 4, 2018Assignee: FANUC CORPORATIONInventor: Masakazu Niwa
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Patent number: 10063142Abstract: 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: GrantFiled: February 19, 2015Date of Patent: August 28, 2018Assignee: Airbus Operations GmbHInventors: Alexander Kaiser, Joerg Wangemann, Hauke-Peer Luedders
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Patent number: 10063179Abstract: 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: GrantFiled: November 30, 2015Date of Patent: August 28, 2018Assignee: Yaskawa America, Inc.Inventor: Mahesh M. Swamy
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Patent number: 10050603Abstract: 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: GrantFiled: August 22, 2016Date of Patent: August 14, 2018Assignee: MediaTek Inc.Inventors: Chien-Cheng Lin, Jui-Chih Kao
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Patent number: 10033315Abstract: 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 correctType: GrantFiled: July 9, 2014Date of Patent: July 24, 2018Assignee: Robert Bosch GmbHInventors: Bernd Spielmann, Martin Silberbauer, Meinrad Praxmarer, Milos Medvecky
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Patent number: 10020724Abstract: 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: GrantFiled: March 11, 2015Date of Patent: July 10, 2018Assignee: DET INTERNATIONAL HOLDING LIMITEDInventors: Daniel Weida, Matthias Staehli
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Patent number: 10014692Abstract: 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: GrantFiled: December 18, 2014Date of Patent: July 3, 2018Assignee: Intel CorporationInventors: Amit K. Jain, Sameer Shekhar
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Patent number: 10003196Abstract: 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: GrantFiled: July 4, 2015Date of Patent: June 19, 2018Assignee: XSLENT Energy Technologies, LLCInventors: Stefan Matan, Fred C Horton, Frank P Marrone
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Patent number: 10003277Abstract: 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: GrantFiled: August 5, 2015Date of Patent: June 19, 2018Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Yasutaka Taguchi, Junya Mitsui, Akira Moriguchi
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Patent number: 9973001Abstract: 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: GrantFiled: December 15, 2015Date of Patent: May 15, 2018Inventor: Aleksandar B. Damjanovic
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Patent number: 9973028Abstract: 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: GrantFiled: June 23, 2014Date of Patent: May 15, 2018Assignee: GM Global Technology Operations LLCInventors: Chandra S. Namuduri, Rashmi Prasad
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Patent number: 9973103Abstract: 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: GrantFiled: January 18, 2017Date of Patent: May 15, 2018Assignee: Rockwell Automation Technologies, Inc.Inventors: Prathamesh R. Vadhavkar, Brian J. Seibel, Russel J. Kerkman
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Patent number: 9973003Abstract: 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: GrantFiled: July 31, 2015Date of Patent: May 15, 2018Assignee: LSIS CO., LTD.Inventor: Yi Kyung Chyun
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Patent number: 9973107Abstract: 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: GrantFiled: August 11, 2015Date of Patent: May 15, 2018Assignee: Inesc Tec—Instituto de Engenharia de SistemasInventors: Diogo André Cerqueira Pinto Bezerra Varajão, Luís Miguel Faria Miranda, Rui Manuel Esteves Araújo
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Patent number: 9966792Abstract: 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: GrantFiled: November 19, 2015Date of Patent: May 8, 2018Inventor: Shivaling Shrishail Mahant Shetti
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Patent number: 9953119Abstract: 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: GrantFiled: May 24, 2016Date of Patent: April 24, 2018Assignee: LSIS CO., LTD.Inventor: Yi Kyung Chyun
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Patent number: 9935561Abstract: 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: GrantFiled: October 30, 2014Date of Patent: April 3, 2018Assignee: DET INTERNATIONAL HOLDING LIMITEDInventors: Peter Ide, Frank Schafmeister, Jörg Richter, Barzin Pour, Daniel Spesser, Dirk Herke
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Patent number: 9929635Abstract: 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: GrantFiled: January 5, 2016Date of Patent: March 27, 2018Assignees: Lite-On Electronics (Guangzhou) Limited, Lite-On Technology Corp.Inventors: I-Chao Chiu, Yeh Guan
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Patent number: 9923370Abstract: A computer program product and system are disclosed including but not limited to supplying a voltage waveform from a higher power electrical bus to a lower power electrical bus; sensing on the lower power electrical bus, a deviation from a sinusoidal voltage waveform in the voltage waveform supplied from the higher power electrical bus; generating a correction current to adjust the deviation in the voltage on the lower power bus to a substantially sinusoidal voltage waveform; and filtering the correction current to substantially attenuate the correction current from propagating through the filter from the lower power electrical bus to the higher power electrical bus.Type: GrantFiled: July 13, 2016Date of Patent: March 20, 2018Inventors: Charles Sutherland, John Bradford Janik
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Patent number: 9912222Abstract: A circuit configuration and system of capacitors for a converter having a filter system, the circuit configuration including a converter, which has an alternating voltage connection, especially for a multiphase input- or output-side alternating voltage source, and a unipolar connection on the input or output side, especially a direct voltage connection, especially for a voltage intermediate circuit, the alternating voltage connection being connected to phase lines, especially to three phase lines, the phase lines having inductances, in particular, characterized in that first capacitances are situated between a phase line and a common star point in each case, it being the case, in particular, that one of the first capacitances is situated between a particular phase line, especially each phase line, and the common star point, it being the case, in particular, that each of the first capacitances is of equal size.Type: GrantFiled: March 4, 2013Date of Patent: March 6, 2018Assignee: SEW-EURODRIVE GMBH & CO. KGInventor: Klaus Marahrens
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Patent number: 9893704Abstract: A circuit (290) comprises an RC filter circuit (100), which comprises an ohmic resistor (112) and a capacitor (113). In addition, the circuit (290) comprises a compensation circuit (200), which is designed to provide a compensation current flow (192), which corresponds to a current flow (191) to a load (150).Type: GrantFiled: July 28, 2015Date of Patent: February 13, 2018Assignee: Infineon Technologies Austria AGInventors: Elmar Bach, Christian Lindholm
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Patent number: 9893599Abstract: A motor may include a housing, a motor assembly accommodated in the housing, and a mold cover having an outer circumferential surface. The outer circumferential surface may be coupled to the housing, which has electrical conductivity. A noise filter is provided in the mold cover. A ground terminal of the noise filter is electrically connected to the outer circumferential surface of the mold cover.Type: GrantFiled: December 11, 2014Date of Patent: February 13, 2018Assignee: LG INNOTEK CO., LTD.Inventor: Jae Young Yeo
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Patent number: 9887592Abstract: An AC line filter is connected to an enclosure serving as a ground. A power transmission unit is configured to transmit electric power to a power reception device in a contactless manner. An inverter is provided between the AC line filter and the power transmission unit. A common mode filter is provided between the inverter and the power transmission unit. A Y capacitor of the common mode filter is not connected to the enclosure, but is connected to a power line between the AC line filter and the inverter.Type: GrantFiled: April 15, 2016Date of Patent: February 6, 2018Assignee: Toyota Jidosha Kabushiki KaishaInventors: Toru Nakamura, Nobuhisa Yamaguchi
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Patent number: 9887616Abstract: A single-phase AC/DC electric power conversion apparatus includes an indirect matrix converter having an input interface to receive a first alternating current (AC) signal and an output interface to produce a second AC signal, where the first AC signal has a grid frequency. A transformer has a primary winding and an electrically isolated and magnetically coupled secondary winding. A coupling inductor is connected in series between the output interface of the indirect matrix converter and the primary winding. An H-bridge switching arrangement is connected to the secondary winding and produces an output signal having a DC component and at least one AC component. The at least one AC component has a second order harmonic of the grid frequency. An active filter reduces the second order harmonic AC component. A modular conversion apparatus for three-phase power replicates the single-phase apparatus as a module for each phase and omits the active filter.Type: GrantFiled: July 1, 2015Date of Patent: February 6, 2018Assignee: Hella Corporate Center USA, Inc.Inventors: Hua Bai, Juncheng Lu
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Patent number: 9859803Abstract: A transformer based isolated bi-directional DC-DC power converter may have signals for controlling power transfer in first and second directions are derived from the same side of the transformer. The converter may include a transformer, a first switching circuit, a second switching circuit, and a controller. In a first mode, the controller controls the first and second switching circuits, and power is transferred from a first side to a second side. In a second mode, the controller controls the first and second switching circuits, and power is transferred from the second side to the first side.Type: GrantFiled: April 23, 2013Date of Patent: January 2, 2018Assignee: Analog Devices GlobalInventor: Bernhard Strzalkowski
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Patent number: 9857854Abstract: Disclosed herein are embodiments of an improved switching regulator and a method for controlling a switching regulator, for example, to meet stringent transient demand and high efficiency requirements over wide operating range without impacting system stability. According to one embodiment, the switching regulator may be a voltage regulator comprising a plurality of voltage regulator phases, each phase comprising a power stage operable to produce an output voltage for a transient load, and a driver stage coupled for driving the power stage based on a modulated input signal supplied to the driver stage. A variable inductor is included within the power stages in order to meet stringent transient demand and high efficiency requirements over a range of load conditions and operating set points.Type: GrantFiled: February 29, 2016Date of Patent: January 2, 2018Assignee: Dell Products LPInventors: Kejiu Zhang, Shiguo Luo
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Patent number: 9835364Abstract: A harmonic component extraction unit obtains a command value of compensating current from a harmonic component of the load current. A difference current generation unit obtains a deviation between the compensating current and a value obtained by leading a phase of the command value by a predetermined phase difference. A current controller generates a control signal based on output of the difference current generation unit. A driving signal generation circuit generates, based on the control signal, a driving signal driving a parallel active filter.Type: GrantFiled: November 25, 2013Date of Patent: December 5, 2017Assignee: Daikin Industries, Ltd.Inventor: Reiji Kawashima
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Patent number: 9819184Abstract: Described embodiments include a system and a method. A system includes an energy storage device configured to store and release energy. The system includes a waveform sensor configured to detect a second harmonic or higher frequency component deviation in a waveform of electric power supplied to the system by an electrical power grid. The system includes a bi-directional switched-mode converter coupled between the energy storage device and the electrical power grid. The switched-mode converter is configured to receive and convert electric power from the electrical power grid into energy stored in the energy storage device and to convert energy released from the energy storage device into electric power and discharge the converted electric power into the electrical power grid. The system includes a waveform correction manager configured to control the bi-directional switched-mode converter in a manner implementing a waveform deviation reduction strategy responsive to the detected deviation in the waveform.Type: GrantFiled: February 21, 2013Date of Patent: November 14, 2017Inventors: Paul G. Allen, Kenneth G. Caldeira, Roderick A. Hyde, Muriel Y. Ishikawa, Jordin T. Kare, John Latham, Nathan P. Myhrvold, Stephen H. Salter, Clarence T. Tegreene, David B. Tuckerman, Thomas Allan Weaver, Charles Whitmer, Lowell L. Wood, Jr., Victoria Y. H. Wood
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Patent number: 9819283Abstract: A control method and system are provided for regulating operation of power factor correction rectifiers based on the non-symmetric boost converter topology. Control of both the front-end stage is enabled taking sinusoidal current from the utility network and a downstream converter providing isolated DC output voltage. Also provided are a method and system for reducing volume of reactive components in boost-based rectifiers with power factor correction. Flux density through the inductor is reduced with a biasing inductor current having a much lower frequency than the switching frequency of the converter.Type: GrantFiled: April 22, 2014Date of Patent: November 14, 2017Assignee: IDT Europe GmbHInventors: Behzad Mahdavikhah, Aleksandar Prodic
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Patent number: 9806512Abstract: A protective device protects an LC filter in a vehicle. The vehicle includes a first vehicle-mounted electric device and a second vehicle-mounted electric device. The first vehicle-mounted electric device includes a first power converter. The second vehicle-mounted electric device includes a second power converter and shares a power supply with the first vehicle-mounted electric device. The LC filter is arranged between the first power converter and the power supply. The LC filter is configured such that the resonance frequency band of the LC filter can be changed. The resonance frequency band of the LC filter is changed based on a ripple amount in a current flowing in the LC filter.Type: GrantFiled: August 26, 2013Date of Patent: October 31, 2017Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Fumihiro Kagawa, Hiroshi Fukasaku, Kazuki Najima, Yoshiki Nagata
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Patent number: 9720476Abstract: An automatic transfer switch (ATS) includes power quality conditioners to condition electrical power fed to a power output of the automatic transfer switch. In some embodiments, the power quality conditioners include a surge protection circuit or a filter circuit. In some embodiments, the automatic transfer switch includes a battery module configured to supply electrical power to the power output of the ATS during a power disruption event.Type: GrantFiled: March 13, 2015Date of Patent: August 1, 2017Assignee: Amazon Technologies, Inc.Inventors: Huyen Van Nguyen, Richard Arvel Stevens, Hoang Pham
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Patent number: 9717120Abstract: This invention is concerned with the control and design of a LED lighting system that does not need electrolytic capacitors in the entire system and can generate light output with reduced luminous flux fluctuation. The proposal is particularly suitable, but not restricted to, off-line applications in which the lighting system is powered by the ac mains. By eliminating electrolytic capacitors which have a limited lifetime of typically 15000 hours, the proposed system can be developed with passive and robust electrical components such as inductor and diode circuits, and it features long lifetime, low maintenance cost, robustness against extreme temperature variations and good power factor. No extra electronic control board is needed for the proposed passive circuits, which can become dimmable systems if the ac input voltage can be adjusted by external means.Type: GrantFiled: October 20, 2009Date of Patent: July 25, 2017Assignee: CITY UNIVERSITY OF HONG KONGInventors: Ron Shu Yuen Hui, Wu Chen
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Patent number: 9699939Abstract: A system and method for cooling electronic devices disposed with a volume of a fluid-tight sealed enclosure. Thermally conductive fluids that fill one or more volumes of said sealed enclosure may be circulated away from said sealed enclosure to an external heat exchange mechanism. The volume of the sealed container contains one or more single phase or multi-phase thermally conductive fluids and may contain solid or sealed hollow structures that conform to or occupy space between said electronic devices. Pressure balancing mechanisms are included to maintain suitable pressure of gaseous fluid in a volume of the sealed container.Type: GrantFiled: January 6, 2017Date of Patent: July 4, 2017Inventor: David Lane Smith
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Patent number: 9694702Abstract: The invention relates to a circuit arrangement of an electric vehicle, in particular a circuit arrangement of an electric vehicle for inductive power transfer to the vehicle, and a method of operating the named circuit arrangement. The circuit arrangement includes an impedance and at least one rectifier for rectifying an AC voltage. An AC part of the circuit arrangement includes the impedance. The rectifier connects the AC part to a DC part of the circuit arrangement. The circuit arrangement further includes at least one current control means for controlling a current flow in the AC part vehicle.Type: GrantFiled: September 10, 2013Date of Patent: July 4, 2017Assignee: Bombardier Transportation GmbHInventor: Alireza Safaee
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Patent number: 9698761Abstract: A resonant matching circuit (310) for matching a resonant frequency of a wireless power transfer system to a frequency of a power signal comprises a switch (311) connected in parallel with a resonant element (302) of the wireless power transfer system; and a controller (312) connected to the switch (311) and configured to detect a zero-voltage level crossing of a signal flowing through the resonant element (302) and to close the switch (311) for a predefined amount of time upon detection of the zero-voltage level crossing, wherein closing the switch (311) for the predefined amount of time adds any one of an inductive value and a capacitive value to the resonant frequency of a wireless power transfer system.Type: GrantFiled: August 6, 2012Date of Patent: July 4, 2017Assignee: PHILIPS LIGHTING HOLDING B.V.Inventors: Eberhard Waffenschmidt, Adrianus Sempel, Dave Willem Van Goor, Henricus Theodorus Van Der Zanden
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Patent number: 9696743Abstract: 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: GrantFiled: February 4, 2015Date of Patent: July 4, 2017Assignee: Motiv Power Systems, Inc.Inventors: William Treichler, James Michael Castelaz, Grayson Zulauf