In Inverter Systems Patents (Class 363/40)
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Patent number: 12126252Abstract: A switching arrangement of an inverter with a filter circuit and a grid relay. For the filter circuit use is made of an equivalent circuit consisting of effective filter inductance, from filter inductance and topology of the filter circuit and effective filter capacitance, from the filter capacitance and topology of the filter circuit. The effective filter inductance and the effective filter capacitance are system parameters. To determine system parameters, a voltage pulse is applied between a first conductor output and a second conductor output when the grid relay is open; the first conductor output and the second conductor output are connected via the switching arrangement to form a closed oscillating circuit a current value of the effective filter inductance and the effective filter capacitance is determined from a current curve and/or voltage curve in the resonant circuit as system parameters for controlling the switching arrangement.Type: GrantFiled: February 12, 2021Date of Patent: October 22, 2024Assignee: Fronius International GmbHInventors: Stefan Wieser, Michael Rothböck, Roland Pieler, Harald Kreuzer
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Patent number: 12119740Abstract: The converter includes a primary-side winding, a secondary-side winding, a resonant inductor, a resonant capacitor, and a noise suppression network. The primary-side winding and the secondary-side winding form a transformer. The noise suppression network is connected between a primary-side quiescent point and a secondary-side quiescent point. The primary-side quiescent point is a direct current stable potential at an input terminal of the DC/DC converter. The secondary-side quiescent point is a direct current stable potential at an output terminal of the DC/DC converter. A first parasitic capacitance between a first terminal of the primary-side winding and the secondary-side quiescent point is equal to a second parasitic capacitance between a second terminal of the primary-side winding and the secondary-side quiescent point. A suppression current is generated by the noise suppression network, and has a direction opposite to a direction of a total noise current generated by the resonant inductor.Type: GrantFiled: August 2, 2022Date of Patent: October 15, 2024Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Qiong Ye, Jiebin Cheng, Qinghai Wang, Fulong Guo
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Patent number: 12074534Abstract: There is provided methods and apparatus configured to provide electrical converter control parameters, the apparatus comprising: a Structured H-infinity tuning module configured to determine one or more control parameters, for a model of an electrical converter control system and grid, based on variation of one or more grid parameters; and an output module configured to provide the one or more control parameters for implementation in the electrical converter control system.Type: GrantFiled: September 4, 2020Date of Patent: August 27, 2024Assignee: Power Nova Technology LimitedInventors: Masoud Bazargan, Sajjad Fekriasl, Sean Kelly, Andre Paulo Canelhas
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Patent number: 12054288Abstract: A ground power unit provides electrical energy for aircraft and a method maintains and operates the ground power unit. The ground power unit includes a base frame, a cable system formed in the base frame, at least one rectifier module for converting an input alternating voltage applied to a rectifier module input side into an intermediate direct voltage output at a rectifier module output side, wherein the rectifier module output side is coupled to an intermediate circuit conductor and at least one inverter module for converting the intermediate direct voltage applied to an inverter module input side into an output alternating current output at an inverter module output side, wherein the inverter module input side is coupled to an intermediate circuit conductor. The rectifier module and the inverter module are each realized as structurally-independent units, which can be replaced individually and independently of the base frame.Type: GrantFiled: September 17, 2020Date of Patent: August 6, 2024Assignee: Dynell GmbHInventors: Herbert Grabner, Philipp Moser, Christian Raschko
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Patent number: 12009760Abstract: An electronic device may include an inverter. The inverter may convert direct current (DC) power to alternating current (AC) power. The inverter may use a clock signal at a given frequency to output corresponding alternating current signals at the given frequency. The inverter may receive a dithered clock signal that is frequency dithered using a modulating signal. The dithered clock signal may have at least three different frequency levels during a repeated cycle of the modulating signal. The at least three different frequency levels may include a fundamental frequency, a first frequency that is lower than the fundamental frequency, and a second frequency that is higher than the fundamental frequency. The dithered clock signal may be, during the repeated cycle of the modulating signal, at the fundamental frequency for fewer total periods than at the first frequency and for fewer total periods than at the second frequency.Type: GrantFiled: June 26, 2023Date of Patent: June 11, 2024Assignee: Apple Inc.Inventors: Sujeet Milind Patole, Cheung-Wei Lam, Mahmoud N Mahmoud
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Patent number: 11996769Abstract: A noise filter includes: a voltage detector which detects a common mode voltage generated by a power converter; a voltage division circuit which outputs a division voltage obtained by dividing the common mode voltage detected by the voltage detector; a plurality of common mode transformers which superimpose injection voltages each having a polarity opposite to a polarity of the common mode voltage onto an output from or an input to the power converter; and an injection waveform generator which generates, on the basis of the division voltage, output voltages to be outputted to primary sides of the plurality of common mode transformers. The injection waveform generator generates the output voltages such that a difference between the common mode voltage and a total injection voltage obtained by summing the injection voltages to be superimposed by the plurality of common mode transformers is equal to or smaller than an allowable value.Type: GrantFiled: June 4, 2020Date of Patent: May 28, 2024Assignees: MITSUBISHI ELECTRIC CORPORATION, MITSUBISHI ELECTRIC ENGINEERING COMPANY, LIMITEDInventors: Yuki Fujita, Yasuaki Furusho, Hiroyuki Ichinose
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Patent number: 11990886Abstract: A filter unit according to the present invention includes a substrate, capacitors mounted on the substrate, and two inductors. The inductors each include a wire and a core. The core includes two core bodies. The core bodies each have a ring shape and include a wiring hole. The capacitors are disposed between the two core bodies. An opposed section extends from the respective two core bodies to a position opposed to the capacitors C. The opposed section is opposed to all of the plurality of capacitors.Type: GrantFiled: June 11, 2020Date of Patent: May 21, 2024Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Yoshifumi Akita, Tomohiro Suguro
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Patent number: 11984819Abstract: A power conversion circuit includes a switching network, a control circuit, a filter circuit, and a direct current side circuit; and the filter circuit includes a first power inductor, a common mode choke, a first differential mode filter capacitor, a first common mode filter capacitor, and a second common mode filter capacitor. The first power inductor includes a first winding and a second winding, and the common mode choke includes a third winding and a fourth winding; a first end of the first winding and a first end of the second winding are separately connected to the switching network, a second end of the first winding and a second end of the second winding are respectively connected to a first end of the third winding and a first end of the fourth winding.Type: GrantFiled: October 6, 2021Date of Patent: May 14, 2024Assignee: Huawei Digital Power Technologies Co., Ltd.Inventors: Zhaohui Wang, Lei Shi, Dong Chen
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Patent number: 11973437Abstract: A power conversion device includes, for respective phases of an AC circuit, leg circuits each having a pair of arms connected in series to each other, each arm including a plurality of converter cells which are connected in series and each of which has an energy storage element. A controlling circuitry includes a zero-phase-sequence voltage command value adjustment unit for correcting arm voltage command values for the arms by a zero-phase-sequence voltage command value. The command value correction circuitry performs adjustment control for adjusting the zero-phase-sequence voltage command value so that at least one arm voltage command value becomes equivalent to a limit value of the output voltage range of the arm.Type: GrantFiled: March 30, 2020Date of Patent: April 30, 2024Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Miwako Tanaka, Takushi Jimichi, Akito Nakayama
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Patent number: 11949346Abstract: The present disclosure relates to an inverter apparatus, a control module of the inverter apparatus, and control methods thereof, and more particularly, to an inverter apparatus enabling stable voltage control using active damping, a control module of the inverter apparatus, and control methods thereof.Type: GrantFiled: June 9, 2022Date of Patent: April 2, 2024Assignee: HL MANDO CORPORATIONInventor: Bong Yeon Choi
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Patent number: 11949348Abstract: A multi-pulse line-interphase transformer converter includes an electric part that includes magnetic components configured to be connected to a three-phase AC grid, and an electric part that includes a multi-phase voltage system configured to be connected to a common DC capacitor. The electric part splits each AC grid phase n times into two phases, resulting in a plurality of intermediate phases at an internal interface, each intermediate phase corresponding to a pulse of the multi-pulse line-interphase transformer converter. The intermediate phases are connected to the multi-phase voltage system. The multi-phase voltage system comprises bridges with actively controlled switches. The bridges are connected in parallel to the common DC capacitor.Type: GrantFiled: August 9, 2022Date of Patent: April 2, 2024Assignee: ABB E-mobility B.V.Inventors: Uwe Drofenik, Francisco Canales, Daniel Rothmund
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Patent number: 11942876Abstract: A power conversion device includes: a power conversion circuit connected to a direct-current power supply and a power system and configured to perform conversion between direct-current power and alternating-current power; a phase-locked loop circuit configured to output a phase instruction value based on a system alternating-current voltage phase of the power system; and a control circuit configured to control the power conversion circuit based on the phase instruction value from the phase-locked loop circuit. The phase-locked loop circuit includes: a phase difference calculation section configured to calculate a phase difference in a predetermined cycle, the phase difference representing a deviation of the phase instruction value from the system alternating-current voltage phase of the power system; a phase difference correction section; and a phase instruction value generation section configured to output the phase instruction value based on an output of the phase difference correction section.Type: GrantFiled: December 20, 2019Date of Patent: March 26, 2024Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Kazuki Aoyagi, Yoshihiro Tawada
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Patent number: 11929671Abstract: Methods for operating an interleaved resonant power converter, and systems and apparatuses for power conversion. The method includes generating a first pair of complementary signals to drive a first stage of the interleaved resonant power converter. The method also includes generating a second pair of complementary signals to drive a second stage of the interleaved resonant power converter. The method further includes generating a current-mode control signal based on a current sense signal of the first stage. The method also includes adjusting a switching frequency of the first pair of complementary signals based on the current-mode control signal. The method further includes adjusting a switching frequency of the second pair of complementary signals to match the switching frequency of the first pair of complementary signals.Type: GrantFiled: January 4, 2022Date of Patent: March 12, 2024Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLCInventor: Roman Mazgut
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Patent number: 11843340Abstract: A power tool includes a brushless motor including several windings, a drive circuit for driving the brushless motor, a detection device for detecting the brushless motor so as to obtain a load parameter corresponding to a load of the brushless motor, and a controller for outputting a first control signal to reduce current of the brushless motor in a first slope when the load parameter exceeds a first preset range.Type: GrantFiled: June 6, 2022Date of Patent: December 12, 2023Assignee: Nanjing Chervon Industry Co., Ltd.Inventors: Hongwei Wang, Qian Xu, Weipeng Chen, Xiangqing Fu, Dongrong Qiu, Wencheng Li
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Patent number: 11761985Abstract: Techniques are described for calibrating sensors for use in systems in the presence of offset. Sensors may be used to generate sense signals which represent true signals that are part of a system. When the sensors are not calibrated, inefficiency due to offset can be introduced into a system that incorporates the generated sense signal. Flipping techniques may be used to mitigate offset. Applicant has appreciated that when the sensor gains are mismatched, the offset calibration associated with a sensor is not independent from the offset calibration associated with the other sensors. Some of the flipping techniques described herein account for gain mismatch by flipping the polarity of each sensor in a one-at-a-time fashion, and by combining the results in a common system of equations to determine the gain mismatch and the offset of each sensor.Type: GrantFiled: February 3, 2022Date of Patent: September 19, 2023Assignee: Analog Devices International Unlimited CompanyInventors: Guilhem Azzano, Jens Sorensen
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Patent number: 11750081Abstract: A method for balancing thermal stresses in semiconductor switching devices may include (a) monitoring temperatures of the semiconductor switching devices to provide a temperature difference between two of the switching devices; and (b) based on the temperature difference, providing a zero-sequence component to be used for adjusting conduction times of each of the semiconductor devices.Type: GrantFiled: November 17, 2020Date of Patent: September 5, 2023Assignee: DELTA ELECTRONICS, INC.Inventors: Yan Zhou, Baiming Shao, Yingying Gui, Krzysztof S. Klesyk
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Patent number: 11699973Abstract: A metering and control subsystem for a photovoltaic solar system is configured for metering the photovoltaic solar system using current measurement devices and individually controlling relays to selectively energize photovoltaic branch circuits. In some examples, the metering and control subsystem includes photovoltaic branch connectors, a relay matrix, current measurement devices, and a metering and relay control circuit. The metering and control circuit is configured for metering the photovoltaic solar system using current measurement data from the current measurement devices and individually controlling the relays to selectively energize each photovoltaic branch circuit.Type: GrantFiled: May 23, 2018Date of Patent: July 11, 2023Assignee: SunPower CorporationInventors: Kevin C. Fischer, Philip Rothblum, Donald H. Scrutchfield, Dylan W. Benjamin
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Patent number: 11673473Abstract: An illustrative dual power inverter module includes a detection circuit configured to detect loss of low voltage DC electrical power supplied to a controller for a first power inverter and a second power inverter of a drive unit for an electric vehicle. A first backup power circuit is associated with the first power inverter and a second backup power circuit is associated with the second power inverter. Each backup power circuit is configured to convert high voltage DC electrical power to low voltage DC electrical power responsive to detection of loss of low voltage DC electrical power supplied to the controller. Three-phase short circuitry is configured to apply a same fault action to the first power inverter and the second power inverter responsive to detection of loss of low voltage DC electrical power supplied to the controller, wherein the same fault action includes applying equalized torque to each axle operatively coupled to the drive unit.Type: GrantFiled: July 29, 2021Date of Patent: June 13, 2023Assignee: Rivian IP Holdings, LLCInventors: Steven E. Schulz, David Tang, Silva Hiti, Richard M. Breese
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Patent number: 11671008Abstract: The Kappa converter circuit, as introduced herein, can be configured for step-down (buck), step-up (boost), or buck-boost operation. The Kappa converter circuit exhibits lower electromagnetic interference (EMI) relative to other buck, boost, or buck-boost topologies, such as without additional input or output filter circuits. The Kappa converter circuit can have high power handling capability and less DCR loss, for example due to a distribution of current signals through respective inductors. The Kappa converter circuit includes isolating inductors at its input and ground reference nodes to help reduce signal bounce or signal pulsations at supply and ground reference busses, thereby further reducing EMI noise due to switching in the circuit. When the Kappa converter is configured for step-up operation, the converter exhibits no right-half-plane (RHP) zero.Type: GrantFiled: August 27, 2020Date of Patent: June 6, 2023Assignee: Analog Devices International Unlimited CompanyInventors: Xugang Ke, Min Chen, Shuilin Tian, Keith Szolusha
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Patent number: 11664737Abstract: According to the present embodiment, a DC transformation system includes a rectifier, a first power conversion device, a second power conversion device, and a control device. The rectifier rectifies AC power supplied from an AC power source and outputs a first DC voltage. The first power conversion device is connected in series to the rectifier and outputs a second DC voltage. The second power conversion device is connected in parallel to the rectifier and converts power supplied from the rectifier to supply the converted power to the first power conversion device. The control device controls the first power conversion device to cause an addition/subtraction voltage of the first DC voltage and the second DC voltage to be a predetermined voltage.Type: GrantFiled: November 9, 2020Date of Patent: May 30, 2023Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATIONInventors: Koji Maki, Masayuki Nogi
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Patent number: 11658578Abstract: A DC-DC auto-converter module includes a positive source terminal, a negative source terminal, a positive load terminal, a negative load terminal, and a DC-DC converter. The negative source terminal cooperates with the positive source terminal to facilitate electrical connection of a DC power source thereto. The negative load terminal cooperates with the positive load terminal to facilitate connection of an electrical load thereto. The isolated DC-DC converter comprises an input circuit and an output circuit that is galvanically isolated from the input circuit. The DC-DC converter includes a positive input terminal, a negative input terminal, a positive output terminal, and a negative output terminal. At least one of the positive input terminal, the negative input terminal, the positive output terminal, and the negative output terminal is galvanically connected to at least one of the positive source terminal, the negative source terminal, the positive load terminal, and the negative load terminal.Type: GrantFiled: July 18, 2022Date of Patent: May 23, 2023Assignee: Terminal Power LLCInventor: Gerald Murray Brown
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Patent number: 11650231Abstract: A power conversion device includes: a plurality of legs, each leg including a high-side switch connected between a voltage supply node and a phase node and a low-side switch connected between the phase node and a reference node; a phase current sensor for each leg and configured to sense current flowing through the high-side switch or the low-side switch of the corresponding leg; a single current sensor connected between the reference node and the low-side switches, or between the voltage supply node and the high-side switches; and a controller. During a subperiod of a switching period, the controller is configured to sample the current sensed by at least one of the phase current sensors and a current sensed by the single current sensor such that the current in one or more of the legs is sampled during the same subperiod as the current flowing through the single current sensor.Type: GrantFiled: June 15, 2021Date of Patent: May 16, 2023Assignee: Infineon Technologies Austria AGInventors: Tao Zhao, Pablo Yelamos Ruiz
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Patent number: 11652421Abstract: A line interface filter apparatus to couple a drive or group of drives to a shared multiphase AC bus, including individual phase circuits having an inductor coupled between a respective bus and drive phase lines, a tapped resistor coupled to the respective drive phase line, and a capacitor coupled between the resistor and a common connection of the capacitors of the individual phase circuits, where the capacitance of the capacitors is 5 to 15 times a per-phase equivalent capacitance of the drive or group of drives, and the resistance of the resistors is two times a damping ratio times a square root of a ratio of the filter inductance to the filter capacitance, where the damping ratio ? is greater than or equal to 1.0 and less than or equal to 2.0.Type: GrantFiled: March 22, 2022Date of Patent: May 16, 2023Assignee: Rockwell Automation Technologies, Inc.Inventors: Gary L. Skibinski, Zhijun Liu
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Patent number: 11646676Abstract: A modulation technique is described in which a controller modulates the output AC voltages to introduce an offset to the phase that is most positive or most negative such that the phase is clamped to the +dc supply when the respective phase is most positive and to the ?dc supply rail when most negative. The offset is provided by introducing a common mode component voltage to all of the phases over a plurality of output angle segments. In order to reduce the Noise Vibration and Harshness (NVH) and EMI, the common mode component voltage amplitude is varied over the output angles within the respective segment between a minimum and a maximum in order to control a slew rate of the rising or falling edges of the three phase AC output voltages.Type: GrantFiled: December 20, 2021Date of Patent: May 9, 2023Assignee: YASA LIMITEDInventors: Simon David Hart, Samuel David Ahearn
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Patent number: 11632057Abstract: A three-phase converter and a control method thereof are provided. The three-phase converter includes an AC terminal, three filter circuits, three bridge arm circuits, a capacitor module and a DC terminal connected in sequence and a controller. The midpoints of the filter circuits are connected to the midpoint of the capacitor module. The controller controls each bridge arm circuit to work in the first and second modes at different time in one line voltage cycle of the AC source. In the first mode, the bridge arm circuit works in a clamping state. In the second mode, the bridge arm circuit selectively works in a DCM mode or a TCM mode. A switching frequency is limited to be lower than a preset frequency. When the three-phase converter works with over 80% of a rated load, a time length of working in the second mode is ?Ëś? of the line voltage cycle.Type: GrantFiled: November 11, 2021Date of Patent: April 18, 2023Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.Inventors: Chao Yan, Tao Xia, Kailiang Zhan, Xinwei Liu
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Patent number: 11594890Abstract: Protection system for limiting the impact of disruptions of an external urban or industrial electrical network on a local electrical network of a site which is connected to the external network and which includes at least one local electric power source, referred to as “local source” connected to the local network and capable of injecting the surplus electric power into the external network, with the protection system including a synchronous machine connected to the local network which is itself connected to the external network by way of a choke, referred to as “network choke.” The protection system includes at least a local choke which is associated with the local source and which is connected to the local network between this local source and the synchronous machine.Type: GrantFiled: September 11, 2018Date of Patent: February 28, 2023Assignee: KS RESEARCH, SOCIÉTÉ ANONYMEInventor: Jacques Schoebrechts
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Patent number: 11569664Abstract: A method for connecting a power transformer, located between an inverter of a wind turbine and an electrical grid, to the electrical grid; the method comprises the steps gradually increasing a voltage at a primary side of the transformer from a low starting voltage to a target voltage equal or close to a nominal voltage of the transformer, by means of the inverter of the wind turbine or by means of an auxiliary inverter, thereby increasing the voltage at a secondary side of the transformer, wherein the gradually increasing of the voltage uses energy of an internal energy storage device, connecting the secondary side of the transformer to the electrical grid after predefined target conditions have been reached.Type: GrantFiled: April 2, 2019Date of Patent: January 31, 2023Assignee: Wobben Properties GmbHInventor: Victor Gomes
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Patent number: 11533013Abstract: Various disclosed embodiments include illustrative controllers, dual power inverter modules, and electric vehicles. In an illustrative embodiment, a controller includes a first processor for a first power inverter.Type: GrantFiled: July 29, 2021Date of Patent: December 20, 2022Assignee: Rivian IP Holdings, LLCInventors: Steven E. Schulz, David Tang, Daniel L. Kowalewski, Silva Hiti
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Patent number: 11489459Abstract: A power converter for providing power to one or more loads, wherein the power converter is configured to be arranged in a parallel configuration with one or more additional power converters. The power converter comprises an inverter for receiving an input voltage and converting this to an output voltage having an associated output current, a module configured to modulate the output voltage using a modulation scheme and first and second feedback circuits.Type: GrantFiled: May 18, 2021Date of Patent: November 1, 2022Assignee: HAMILTON SUNDSTRAND CORPORATIONInventors: Diarmaid John Hogan, Andrei Dinu, Sebastian Pedro Rosado, Virgilio Valdivia Guerrero, Rodrigo Fernandez-Mattos
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Patent number: 11456675Abstract: Since inductance due to wiring to a Y capacitor is large, it is necessary to arrange the Y capacitor near a bus bar, and there is no degree of freedom in arranging the Y capacitor. Directions of currents flowing through a positive electrode side wiring 301 and a negative electrode side wiring 302 in a multi-core cable 300 are a direction 301a from a bus bar positive electrode terminal 114 toward the Y capacitor positive electrode terminal 201, and a direction 302b from a bus bar negative electrode terminal 115 toward the Y capacitor negative electrode terminal 202, respectively. On the other hand, a direction of a current flowing through a ground wiring 303 is a direction 302b from a Y capacitor ground terminal 203 toward a ground terminal 116.Type: GrantFiled: August 6, 2019Date of Patent: September 27, 2022Assignee: Hitachi Astemo, Ltd.Inventors: Yusaku Katsube, Hiroki Funato, Isao Hoda, Aya Ohmae, Fusanori Nishikimi, Yutaka Okubo
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Patent number: 11451214Abstract: A control device for an active filter connected in parallel with a load at an installation point with respect to an AC power supply provided in a power system includes a harmonic voltage detector to detect an m-order harmonic voltage (m is an integer not less than two) included in a voltage of the installation point, a phase corrector to correct a phase of the detected m-order harmonic voltage in accordance with whether an m-order harmonic impedance when an AC power supply side is seen from the installation point is capacitive or inductive, a command value generator to generate a first compensation command value for compensating for the m-order harmonic voltage included in the voltage of the installation point based on the m-order harmonic voltage after the correction, and an output controller to control an output of the active filter based on a first compensation command value.Type: GrantFiled: December 18, 2018Date of Patent: September 20, 2022Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Masatoshi Takeda, Tomohiko Tatsumi, Shinichi Ogusa, Akihiro Matsuda
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Patent number: 11411523Abstract: A motor drive apparatus includes a smoothing capacitor unit including at least one smoothing capacitor provided between a converter circuit and an inverter circuit in a power conversion circuit that generates motor drive power, a snubber capacitor for suppressing a surge voltage of a power device forming a part of the power conversion circuit, and a support plate on which the smoothing capacitor unit is mounted, wherein an electrode terminal of the smoothing capacitor unit and an electrode terminal of the snubber capacitor are placed in proximity to each other with the support plate being sandwiched between them, and a positive electrode terminal of the smoothing capacitor unit and a positive electrode terminal of the snubber capacitor are electrically connected to each other, and a negative electrode terminal of the smoothing capacitor unit and a negative electrode terminal of the snubber capacitor are electrically connected to each other.Type: GrantFiled: September 23, 2020Date of Patent: August 9, 2022Assignee: Fanuc CorporationInventors: Ryou Matsuda, Taku Sasaki
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Patent number: 11394329Abstract: A damper for a power train, comprising a piezoelectric transformer and a load element connected across the output of the piezoelectric transformer.Type: GrantFiled: July 2, 2020Date of Patent: July 19, 2022Assignee: HAMILTON SUNDSTRAND CORPORATIONInventors: Grzegorz Popek, Ignacio Castro
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Patent number: 11387644Abstract: Embodiments described herein are directed to inrush current limiters having a transformer. In one embodiment, an inrush current limiter includes a transformer including a primary winding, a secondary winding and a saturable magnetic core shared therebetween, a resistor connected in parallel with the secondary winding, wherein an impedance of the resistor is reflected across the transformer when a voltage is applied across the primary winding and the saturable magnetic core is not saturated, and a diode connected between the primary winding and ground.Type: GrantFiled: July 28, 2020Date of Patent: July 12, 2022Assignee: L3 CINCINNATI ELECTRONICS CORPORATIONInventor: Justin Graves
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Patent number: 11356021Abstract: A DC-to-DC converter includes a first capacitor, first, second, third, and fourth switches connected in series between first and second electrodes of the first capacitor, a second capacitor connected to a connection node of the first switch and the second switch and a connection node of the third switch and the fourth switch, an inductor connected to a connection node of the second switch and the third switch, and a controller that controls an on/off state of each of the first to fourth switches on the basis of a value obtained by applying a reciprocal of a detection current that is a measured current flowing through the inductor to a difference between a first detection voltage and a first voltage instruction value and a difference between a second detection voltage and a second voltage instruction value.Type: GrantFiled: September 24, 2020Date of Patent: June 7, 2022Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventors: Jung Hwi Kim, Jung Mo Yu, Yong Jae Lee, Jae Ho Hwang, Joo Young Park, Jae Hyeon Park
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Patent number: 11293402Abstract: The present disclosure discloses a method and apparatus for detecting a short-circuit capacity at a grid connection point of a wind turbine. The method includes: modulating, when a converter is in a grid-side no-load modulation state and a power grid is in a short-circuited state with respect to the converter, a reactive power reference value and a braking power reference value of the converter; collecting a modulated three-phase voltage signal and a modulated three-phase current signal at the grid connection point of the wind turbine; and obtaining, according to the modulated three-phase voltage signal and the modulated three-phase current signal at the grid connection point of the wind turbine as well as a rated line voltage at the grid connection point of the wind turbine, the short-circuit capacity at the grid connection point of the wind turbine.Type: GrantFiled: July 13, 2018Date of Patent: April 5, 2022Assignee: BEIJING GOLDWIND SCIENCE & CREATION WINDPOWER EQUIPMENT CO., LTD.Inventor: Rui Gao
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Patent number: 11277003Abstract: A drive for a mobile compressor includes EMI and transient protection circuits, second chokes, converters and an inverter. The EMI and transient protection circuits include respectively common mode chokes and at least one component. Each of the common mode chokes is configured to receive a first direct current voltage and is connected to first and second grounds. The at least one component is connected to a third ground. The first, second and third grounds are at different voltage potentials. The second chokes are connected downstream from the common mode chokes. The converters are connected to outputs of the second chokes and are configured to collectively provide a second direct current voltage to a direct current bus. The inverter is connected to the direct current bus and configured to convert the second direct current voltage to an alternating current voltage to power the mobile compressor downstream from the inverter.Type: GrantFiled: August 14, 2020Date of Patent: March 15, 2022Assignee: Emerson Climate Technologies, Inc.Inventor: Joseph G. Marcinkiewicz
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Patent number: 11275397Abstract: A power factor correction circuit includes a power meter configured to measure a total harmonic distortion (THD) and an amplitude ratio of each harmonic component at an input port; a switching-type regulator that is controllable by a switch control signal in order to adjust a power factor; and a controller configured to generate the switch control signal to control the switching-type regulator to perform power factor correction, where the controller decreases the THD by adjusting a current reference signal according to the measured THD and the amplitude ratio of each harmonic component.Type: GrantFiled: May 25, 2020Date of Patent: March 15, 2022Assignee: Silergy Semiconductor Technology (Hangzhou) LTDInventors: Zhaofeng Wang, Xiaodong Huang, Chen Zhao
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Patent number: 11258306Abstract: According to various embodiments, a dual-band multi-receiver (DBMR) wireless power transfer (WPT) system is disclosed. The WPT system includes a transmitter including a first dc-dc converter coupled to a first inverter, a second dc-dc converter coupled to a second inverter, a reactance steering network (RSN) coupled to the first and second inverters, a high frequency transmitting coil coupled to the RSN, and a low frequency transmitting coil coupled to the first and second dc-dc converters. The WPT system further includes one or more receivers, each receiver including a high frequency receiving coil, a low frequency receiving coil, and a rectifier coupled to the high frequency receiving coil and low frequency receiving coil.Type: GrantFiled: December 28, 2018Date of Patent: February 22, 2022Assignee: THE TRUSTEES OF PRINCETON UNIVERSITYInventors: Minjie Chen, Ming Liu
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Patent number: 11245326Abstract: The control apparatus is used with the electrical power converter working to an inputted one of ac voltage and a terminal-to-terminal voltage at a capacitor into the other. The control apparatus calculates a sine-wave command value for a reactor current based on the ac voltage and an amplitude command value indicating an amplitude of the reactor current. The control apparatus also operates switches SW in peak-current mode control to bring the reactor current into agreement with a command value for the reactor current to which a current correction value is added. The control apparatus sets the current correction value to include a component of fluctuation in the terminal-to-terminal voltage at the capacitor based on the ac voltage Vac.Type: GrantFiled: October 19, 2020Date of Patent: February 8, 2022Assignee: DENSO CORPORATIONInventors: Seiji Iyasu, Yuji Hayashi, Yuichi Handa
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Patent number: 11239771Abstract: A control unit calculates a motor voltage vector including a corresponding excitation voltage command and a torque voltage command in response to an output request for the motor and changes a first inverter voltage vector and a second inverter voltage vector while maintaining the motor voltage vector obtained to allow distribution of the motor voltage vector at any ratio. The first inverter voltage vector includes a first excitation voltage command and a first torque voltage command associated with an output from the first inverter, and the second inverter voltage vector includes a second excitation voltage command and a second torque voltage command associated with an output from the second inverter.Type: GrantFiled: March 21, 2019Date of Patent: February 1, 2022Assignee: DENSO CORPORATIONInventors: Kiyotaka Matsubara, Makoto Nakamura, Daigo Nobe, Ryuji Omata
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Patent number: 11228234Abstract: A power converter arrangement includes a semiconductor switch system with a controllable switch. A capacitor unit includes a capacitor having a capacitance value, the capacitor unit being operatively connected to the semiconductor switch system. A conductor arrangement includes a conductor adapted to conduct an electric current between the capacitor unit and the semiconductor switch system. The conductor has a resistance and an inductance. A resonant circuit is formed by the resistance, the inductance and the capacitance, and the power converter arrangement includes at least one attenuating element for attenuating an electrical ringing in the resonant circuit. The attenuating element is conductively isolated from the resonant circuit. The attenuating element includes ferromagnetic material, and the attenuating element is magnetically coupled to the conductor such that variations in the electric current intensity of the conductor induces eddy currents within the attenuating element.Type: GrantFiled: October 23, 2019Date of Patent: January 18, 2022Assignee: ABB Schweiz AGInventors: Henri Kinnunen, Matti Laitinen, Jukka-Pekka Kittilä
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Patent number: 11226648Abstract: A power factor correction circuit includes a power meter configured to measure a total harmonic distortion (THD) at an input port; a switching-type regulator that is controllable by a switch control signal in order to adjust a power factor; and a controller configured to generate the switch control signal to control the switching-type regulator to perform power factor correction, where the controller adjusts an on-time of a main switch of the switching-type regulator based on the measured THD to decrease the THD.Type: GrantFiled: May 25, 2020Date of Patent: January 18, 2022Assignee: Silergy Semiconductor Technology (Hangzhou) LTDInventors: Zhaofeng Wang, Xiaodong Huang, Chen Zhao
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Patent number: 11218069Abstract: A power conversion device, including: a voltage detector that detects a common mode voltage generated upon a switching operation of a power semiconductor device; a voltage superimposer that superimposes the common mode voltage detected by the voltage detector onto an output of the power conversion device to cancel the common mode voltage having a frequency greater than or equal to a switching frequency generated upon the switching operation of the power semiconductor device; and a residual voltage detector that detects the common mode voltage of the power conversion device superimposed by the voltage superimposer. The voltage superimposer includes a feedback mechanism for adding and superimposing the common mode voltage detected by the residual voltage detector onto the output of the power conversion device. The voltage detector includes a first choke coil and a first capacitor.Type: GrantFiled: March 7, 2019Date of Patent: January 4, 2022Assignees: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION, NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Yushin Yamamoto, Satoshi Ogasawara, Shunsuke Ohara
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Patent number: 11183935Abstract: A power converter includes an inductor, boost and buck circuits, and a controller circuit. The controller circuit is configured to determine a current through the inductor, generate a buck reference for comparison with the current to control operation of the buck circuit, calculate a variable offset based upon input and output potentials of the power converter and apply the variable offset to the buck reference to generate a boost reference, compare the boost reference with the current to control operation of the boost circuit, and, based upon comparisons of the current with the buck reference and the boost reference, respectively, operate the boost circuit and the buck circuit.Type: GrantFiled: October 30, 2019Date of Patent: November 23, 2021Assignee: Microchip Technology IncorporatedInventor: Stefan Weiers
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Patent number: 11183940Abstract: A high-frequency resonant power conversion system for transferring power from an oscillator to a load or vice-versa, the system including components with at least one fluctuating parameter and is configured to control the value of a defined variable selected from: a certain current, a certain voltage, a phase difference between a certain voltage and a certain current, and a certain power; the system further including a virtual impedance creation loop which is configured to create a virtual component, the virtual component forming a basis for changing amplitude and a phase of the oscillator, thereby to compensate for a deviation from the controlled variable due to the fluctuations.Type: GrantFiled: March 3, 2020Date of Patent: November 23, 2021Assignee: B.G. NEGEV TECHNOLOGIES & APPLICATIONS LTD., AT BEN-GURION UNIVERSITYInventor: Alon Kuperman
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Patent number: 11171556Abstract: A resonant power converter for converting a DC input voltage to AC or DC output voltage, includes a transistor, and a first inductor connected to an input port for a DC voltage to be converted, the drain being connected to the input port by way of the first inductor, the converter furthermore comprising a first resonant network, connected between the drain of the transistor and ground, the first resonant network being configured so as to extract the fundamental component of a drain-source voltage of the transistor and to phase-shift it by a phase shift angle such that the fundamental component and the drain-source voltage are in phase opposition and thus generate a sinusoidal drive signal.Type: GrantFiled: October 30, 2018Date of Patent: November 9, 2021Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Rawad Makhoul, Xavier Bourgeois, Xavier Maynard, Pierre Perichon
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Patent number: 11159021Abstract: An arrangement for reactive power compensation at an electric energy transmission line includes at least one first reactive power compensation device including a first type of power electronic switches, at least one second reactive power compensation device including a second type of power electronic switches and a transformer having a first secondary coil connected to the first device, a second secondary coil connected to the second device and a primary coil connectable to the electric energy transmission line. The primary coil has more windings than any of the first and second secondary coils.Type: GrantFiled: May 2, 2017Date of Patent: October 26, 2021Assignee: Siemens Energy Global GmbH & Co. KGInventors: Markus Wiesinger, Sergey Kynev
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Patent number: 11070147Abstract: A resonant inverter apparatus supplies a high AC voltage to a discharge load. In this apparatus, an inverter circuit converts a DC voltage to an AC voltage using a plurality of switching elements. A transformer steps up the AC voltage and generates a high AC voltage. A DC voltage detecting unit detects a value of a DC voltage supplied to the inverter circuit. A control unit generates a driving pulse for performing on/off switching of the switching elements. The switching elements include first and second switching elements. The control unit performs phase angle control of the driving pulse. In response to the detected value of the DC voltage being greater than a reference value, the control unit sets a switching phase angle of the second switching element relative to the first switching element serving as reference, based on the magnitude of the valued of the DC voltage.Type: GrantFiled: January 30, 2020Date of Patent: July 20, 2021Assignee: DENSO CORPORATIONInventor: Shoichi Takemoto
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Patent number: 10978977Abstract: A method (as implemented in a current controller) is provided for higher bandwidth operation based on minimized interference between positive and negative components of a current controller, where the method may be performed without additional filtering on measured currents to isolate positive and negative current components. The method involves: identifying one or more error signals operated on by a positive sequence controller; transforming the one or more error signals into at least one negative sequence reference frame associated with at least one negative sequence controller; inputting transformed error signals to the negative sequence controller, where undesirable interactions between the positive sequence controller and negative sequence controller is minimized by sharing error signals.Type: GrantFiled: July 8, 2019Date of Patent: April 13, 2021Assignee: Electro Standards LaboratoriesInventors: Raymond B Sepe, Jr., Steven Bastien