Using Converter Patents (Class 323/207)
  • Patent number: 10454369
    Abstract: A switched voltage converter may be controlled with load current feedforward control loop in addition to an output voltage feedback loop. The converter includes a first switch device that is controlled to open and close at a selected switching rate with a selected duty cycle. The first switch device is coupled in series with an inductor and conducts current through the inductor while the first switch is closed. A second switch device conducts current from the inductor to an output capacitor and to load while the first switch is open to produce an output voltage and a resulting load current through the load. The load current is measured in a continuous manner and a load current feedforward control signal is generated that is representative of the load current. The switch rate and/or duty cycle of the first switch is adjusted in response to the load current feedforward control signal.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: October 22, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Filip Savic, Giacomo Calabrese, Giovanni Frattini
  • Patent number: 10447149
    Abstract: A controller includes a switch controller, a current limit generator, a jitter modulator, and an arithmetic operator circuit. The switch controller is coupled to generate a drive signal to control switching of a power switch in response to a current sense signal and a modulated current limit signal to control a transfer of energy from an input of a power converter to an output of the power converter. The current limit generator is coupled to generate a current limit signal. The jitter modulator is coupled to generate a jitter signal for jittering a switching period of the drive signal without an oscillator. The arithmetic operator circuit is coupled to receive the current limit signal and the jitter signal and is coupled to generate a modulated current limit signal in response to the current limit signal and the jitter signal.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: October 15, 2019
    Assignee: Power Integrations, Inc.
    Inventors: Roland Sylvere Saint-Pierre, Giao Minh Pham, Lance M. Wong, David Michael Hugh Matthews
  • Patent number: 10432094
    Abstract: A boost converter device includes a first boost converter, a second boost converter, and a first electronic control unit. The first electronic control unit being configured to control switching of a first upper arm based on a first pulse width modulation signal and to control switching of a first lower arm based on a first inverted signal acquired by inverting the first pulse width modulation signal. The first electronic control unit is configured to control switching of a second lower arm based on a second pulse width modulation signal and to control switching of a second upper arm based on a second inverted signal acquired by inverting the second pulse width modulation signal.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: October 1, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Shinri Yamada
  • Patent number: 10404064
    Abstract: Aspects of capacitor voltage ripple reduction in modular multilevel converters are described herein. In one embodiment, a power converter system includes a modular multilevel converter (MMC) electrically coupled and configured to convert power between two different power systems. The MMC includes one or more phase legs having a cascade arrangement of switching submodules, where the switching submodules include an arrangement of switching power transistors and capacitors. The MMC further includes a control loop including a differential mode control loop and a common mode control loop. The differential control loop is configured to generate a differential control signal based on a target modulation index to reduce fundamental components of voltage ripple on the capacitors, and the common mode control loop is configured to inject 2nd order harmonic current into a common mode control signal to reduce 2nd order harmonic components of the voltage ripple on the capacitors.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: September 3, 2019
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: Yadong Lyu, Yi-Hsun Hsieh, Fred C. Lee, Qiang Li
  • Patent number: 10401885
    Abstract: A system includes a DC to DC converter coupled with a load, a power source bus coupled with an input of the DC to DC converter, a capacitor coupled in parallel across an output of the DC to DC converter and a controller. The controller may dynamically adjust a bus voltage set point of a bus voltage on the output of the DC to DC converter up or down to prepare for supply of the bus voltage and energy stored in the capacitor to an anticipated load event. The load event may have a load step change that occurs in less than five milliseconds and is greater than about eighty or eighty-five percent of a rated output of the DC to DC converter.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: September 3, 2019
    Assignee: Rolls-Royce North American Technologies Inc.
    Inventors: Andrew Bollman, Eric Duane Schneider
  • Patent number: 10381915
    Abstract: In some examples, a device comprises a power conversion circuit that includes: an inductor having a first end coupled to an input voltage terminal; a first switch coupled to a second end of the inductor at a first node; a second switch coupled to the second end of the inductor and the first switch at the first node; a third switch coupled to the first switch and to another input voltage terminal at a second node; and a fourth switch coupled to the second switch and to the another input voltage terminal at the second node. The device also comprises a control circuit comprising a variable delay circuit coupled to the first and second switches; and a controller coupled to the variable delay circuit, to an inductor current sensor, and to an input voltage sensor, the inductor current sensor coupled to the inductor and the input voltage sensor coupled to the input voltage terminal and the another input voltage terminal.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: August 13, 2019
    Assignee: Texas Instruments Incorporated
    Inventor: Serkan Dusmez
  • Patent number: 10374412
    Abstract: A control unit rod interface arrangement couples between AC and DC power systems. The interface includes at least two poles for coupling between the DC and AC power systems. Each of the poles includes a converter for conversion between AC and DC power. If a fault has occurred in one of the poles, a transient current, or fault current, may flow through a neutral bus line connected to the pole, the pole's converter and the location of the fault in the pole. Such a transient or fault current should preferably be damped out as quickly as possible, after which the pole may be electrically isolated from the other components of the interface arrangement.
    Type: Grant
    Filed: October 12, 2015
    Date of Patent: August 6, 2019
    Assignee: ABB Schweiz AG
    Inventors: Sören Nyberg, Yifan Jia, Ying Jiang-Hafner
  • Patent number: 10348409
    Abstract: Methods and systems for continuous gain control in a feedback transimpedance amplifier (TIA) may include: in a TIA including a gain stage, a feedback resistance for the gain stage, a current sense resistor, and a feedback current control circuit: receiving an input current at an input of the gain stage: directing a current through the current sense resistor to the feedback current control circuit, and generating an output voltage proportional to the input current and a gain of the TIA. The gain may be configured by providing a proportion (?) of the current through the feedback current control circuit to the input of the gain stage. The proportion ? of the current from the feedback current control circuit to the input of the gain stage may be configured by applying a differential voltage to control terminals of a transistor pair in the feedback current control circuit.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: July 9, 2019
    Assignee: Maxlinear, Inc.
    Inventor: Joseph Palackal Mathew
  • Patent number: 10330711
    Abstract: A method and device for detecting inductor current of a PFC circuit are disclosed, which relates to the field of power supply technology. The method includes: detecting a voltage on a boost inductor of a critical-conduction mode PFC circuit, and obtaining an inductor voltage detection signal (S1); converting the inductor voltage detection signal into a voltage signal whose waveform is consistent with a current waveform of the inductor to serve as an inductor current detection signal, to perform loop protection on the PFC circuit or perform over-current protection on the PFC circuit by using the inductor current detection signal (S2).
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: June 25, 2019
    Assignee: ZTE Corporation
    Inventors: Tao Liu, Jianping Zhou, Guoxian Lin, Jie Fan, Yong Luo
  • Patent number: 10291023
    Abstract: The present invention relates to an inverter device for a microgrid, and a method for controlling the same, the inverter device including: a waveform detector detecting a voltage waveform and a current waveform applied to a load; a control unit determining whether a sine wave appears based on the detected voltage waveform and the detected current waveform and performing voltage control or low order harmonic compensation depending on a determination result; and a switch generating a voltage waveform in a form of the sine wave by being turned on/off depending on a control signal received from the control unit and supplying the generated voltage waveform in the form of the sine wave to the load.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: May 14, 2019
    Assignee: KOREA ELECTRIC POWER CORPORATION
    Inventors: Woo-Kyu Chae, Hak-Ju Lee, Jong-Nam Won, Il-Keun Song, Jung-Sung Park, Sung-Wook Hwang
  • Patent number: 10281506
    Abstract: A device load consumes power supplied from an AC power supply. A bypass circuit is provided in parallel with the device load. A controller controls current flowing through the bypass circuit so that an identification signal indicating information for identifying an electric device is superimposed on current flowing from the AC power supply to the electric device. A power measurement sensor detects the current flowing from the AC power supply to the electric device. A control device identifies the electric device based on the identification signal superimposed on the current detected by the power measurement sensor.
    Type: Grant
    Filed: January 21, 2013
    Date of Patent: May 7, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Satoshi Minezawa, Masaaki Yabe, Hirotoshi Yano
  • Patent number: 10277208
    Abstract: A magnetic waveform generator circuit includes a first switch coupled to a first rectifier element at a first node, a first capacitor coupled, at a second node to the first switch, and to a fourth node, a second capacitor coupled, at a third node to the first rectifier element, and to the fourth node, and an inductor coupled between the first and the fourth nodes. The first switch is operable to be in an ON state during a first time period and in an off state during a second time period. The first switch and the first rectifier element are configured to enable the inductor to generate, during the first and the second time periods, a magnetic field having a waveform resembling a positive half-cycle of a triangular waveform.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: April 30, 2019
    Assignee: LOCKHEED MARTIN CORPORATION
    Inventors: James Michael Krause, James P. Mabry, Elton Pepa
  • Patent number: 10256712
    Abstract: A current-ripple-based control strategy for an AC-DC converter with a series ripple cancellation converter (RCC). Embodiments provide series ripple cancellation by sensing the load current information, and significantly simplify the control circuitry. In addition, the embodiments allow input voltage of the series RCC to tightly track its output voltage peak value with no extra control circuit, thus minimizing the RCC component voltage stress as well as the RCC loss. Embodiments are suitable for driving an LED load, where they eliminate LED light flicker caused by the power factor correction (PFC) stage, and significantly reduce its output capacitance.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: April 9, 2019
    Assignee: Queen's University at Kingston
    Inventors: Yajie Qiu, Yan-Fei Liu
  • Patent number: 10250147
    Abstract: A switch-mode power supply includes a control element in a primary circuit for controlling a transformer for transmitting electric energy from the primary circuit to a secondary circuit, a first regulating element in the secondary circuit for regulating an electric output variable of the secondary circuit, and a second regulating element in the primary circuit for regulating an electric controlled variable of the control element as a function of a temperature of the primary circuit, the second regulating element being thermally coupled to an element of the primary circuit whose temperature is to be ascertained.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: April 2, 2019
    Assignee: ROBERT BOSCH GMBH
    Inventors: Juergen Mack, Marc-Alexandre Seibert
  • Patent number: 10243478
    Abstract: Provided are circuits and methods for a power converter that converts AC input power into DC output power using a first output circuit that provides a first output comprising a DC voltage with a first AC voltage ripple and a second output circuit including a floating capacitor and one or more power switching device, and provides a second output comprising a second AC voltage ripple, wherein the first output and the second output are connected together in series, such that the first AC voltage ripple is substantially cancelled and substantially ripple-free DC output power is provided. Embodiments significantly reduce the total output capacitance requirement without sacrificing power factor, thus avoiding the need for electrolytic capacitors and enabling the use of long-life film capacitors. The circuits and methods are particularly suitable for use in applications where ripple-free high power and high reliability are required, such as in high power LED lighting.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: March 26, 2019
    Assignee: Queen's University at Kingston
    Inventors: Yajie Qiu, Yan-Fei Liu
  • Patent number: 10224809
    Abstract: A totem pole power factor correction (PFC) converter is disclosed. The totem pole PFC converter includes a first transistor having a first current terminal coupled to a first node, a first control terminal, and a second current terminal. Also included is a second transistor having a third current terminal coupled to the second current terminal at a second node, a second control terminal, and a fourth current terminal coupled to a third node. A first rectifier is coupled to the first node and a first current sense resistor is coupled between the first rectifier and a fourth node. A second rectifier is coupled to the third node and a second current sense resistor coupled between the second rectifier and the fourth node. A current sense voltage for an analog controller is generated by current alternately flowing through the first current sense resistor and the second current sense resistor.
    Type: Grant
    Filed: October 5, 2017
    Date of Patent: March 5, 2019
    Assignee: Cree, Inc.
    Inventors: Binod Kumar Agrawal, Venkata Subash Bathula, Navneet Kumar Mangal, Guy Moxey
  • Patent number: 10211717
    Abstract: A power supply device includes a switching unit configured to switch to a first path in which a current smoothed by a smoothing unit is supplied to a boost converter and to a second path in which the smoothed current is supplied to a load without passing through the boost converter. The switching unit includes a first switching element to be turned on and a second switching element to be turned off when the first path is formed.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: February 19, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Jun Kawakatsu
  • Patent number: 10211670
    Abstract: According to one aspect, embodiments of the invention provide a UPS comprising a delta transformer having a primary winding and a secondary winding, the primary winding coupled between an input and an output and the secondary winding having a first end and a second end, a delta inverter coupled between a DC bus and the secondary winding, a short circuit control circuit selectively coupled between the first end and the second end of the secondary winding, a main inverter coupled between the DC bus and the output, and a controller configured to control, in a bypass mode of operation, the short circuit control circuit to couple the first end of the secondary winding to the second end such that the secondary winding is short circuited and unconditioned output AC power, derived from the input AC power via the primary winding, is provided to the output.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: February 19, 2019
    Assignee: SCHNEIDER ELECTRIC IT CORPORATION
    Inventor: Flemming Johansen
  • Patent number: 10193439
    Abstract: A power factor correction circuit can include: a power meter configured to measure THD at an input port; a switching-type regulator that is controllable by a switching control signal in order to adjust a power factor of an input signal thereof; and a controller configured to generate the switching control signal to control the switching-type regulator to perform power factor correction, where the controller minimizes the THD by adjusting a current reference signal according to a measured THD, and the current reference signal represents an expected inductor current of the switching-type regulator.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: January 29, 2019
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Zhaofeng Wang, Xiaodong Huang, Chen Zhao
  • Patent number: 10179515
    Abstract: The application relates to a system for charging a battery of an electrical vehicle. The electrical vehicle charging system of the present application is helpful for decreasing the converter capacity while maintaining the charging capacity and electrical vehicles with various nominal voltages can be charged simultaneously. In one aspect the system for charging an electrical vehicle includes: a plurality of central converters, at least one switch electrically connected to the central converters, at least one transformer electrically connected to an external AC power supply, at least one distributed converter for supplying at least one distributed DC voltage with a level below that of the central converter, and a controller connected to the at least one switch.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: January 15, 2019
    Assignee: ABB Schweiz AG
    Inventors: Dawei Yao, Xiaobo Yang, Chunming Yuan, Chao Yang
  • Patent number: 10177648
    Abstract: A circuit for converting DC to AC power or AC to DC power comprises a storage capacitor, boost and buck inductors and switching elements. The switches are controlled to steer current to and from the storage capacitor to cancel DC input ripple or to provide near unity power factor AC input. The capacitor is alternately charged to high positive or negative voltages with an average DC bias near zero. The circuit is configured to deliver high-efficiency power in applications including industrial equipment, home appliances, mobility devices and electric vehicle applications.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: January 8, 2019
    Inventor: Robert W. Horst
  • Patent number: 10164521
    Abstract: A control device for a switching regulator having two or more converter stages operating with interleaved operation, each converter stage including an inductive element and a switch element, generates command signals having a switching period for controlling switching of the switch elements, and determining alternation of a storage phase of energy in the respective inductive element and a transfer phase of the stored energy onto an output element. The control device generates the command signals phase-offset by an appropriate fraction of the switching period to obtain interleaved operation. In particular, a synchronism stage generates a synchronism signal and a control stage generates the command signals for the converter stages timed by the same synchronism signal.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: December 25, 2018
    Assignee: STMicroelectronics S.r.l.
    Inventor: Claudia Castelli
  • Patent number: 10158245
    Abstract: A method and apparatus for controlling an on-board charger (OBC) are provided. The method includes monitoring a voltage of an input power source, increasing or decreasing the voltage of the input power source to a preset output voltage of a power factor corrector (PFC), and operating a converter receiving the preset output voltage to adjust a switching frequency of the converter based on a ripple current of an output terminal of the converter. Additionally, the converter includes a first switch configured to receive a first voltage of a first capacitor mounted within the PFC and a second switch configured to receive a second voltage of a second capacitor mounted within the PFC.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: December 18, 2018
    Assignee: Hyundai Motor Company
    Inventors: Si Hun Yang, Woo Young Lee, Jun Ho Kim, Young Jin Kim, Jin Myeong Yang, Jin Young Yang
  • Patent number: 10148095
    Abstract: A power conditioning device has a first operating mode where the device compensates non-active current components caused by a load, and a second operating mode where the device disconnects the load from a supply in a voltage sag situation, and also provides reserve power for the load.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: December 4, 2018
    Assignee: MERUS POWER DYNAMICS OY
    Inventors: Aki Leinonen, Jyri Öörni
  • Patent number: 10135330
    Abstract: A control circuit for a power converter can include: a current detection circuit configured to generate a current detection signal that represents an input current; a control signal generator configured to generate a switching control signal such that the current detection signal is directly proportional to a voltage conversion function; and a power stage circuit of the power converter being controlled by the switching control signal, where the voltage conversion function is a ratio of an input voltage and an output voltage of the power converter.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: November 20, 2018
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Junming Zhang, Chen Zhao
  • Patent number: 10128744
    Abstract: Disclosed examples include methods and control circuits to operate a single or multi-phase DC-DC converter, including an output that turns a first switch on for a controlled on time and then turns the switch off for a controlled off time in successive control cycles, as well as a PWM circuit that computes a threshold time value corresponding to a predetermined peak inductor current and a duty cycle value, and computes a first time value according to an error value for a subsequent second switching control cycle. The PWM circuit sets the on time to the first time value to operate in a critical conduction mode for the second switching control cycle when the first time value is greater than or equal to the threshold time value, and otherwise sets the controlled on time to the threshold time value for discontinuous conduction mode operation in the second control cycle.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: November 13, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Ananthakrishnan Viswanathan, Joseph Michael Leisten, Brent McDonald, Philomena Cleopha Brady
  • Patent number: 10096999
    Abstract: A var compensator circuit is provided. The var compensator circuit includes a gas tube switch and a reactive impedance. The gas tube switch is configured to be coupled to a transmission line. The transmission line is configured to deliver real power and reactive power to a load at an alternating current (AC) line voltage. The reactive impedance is configured to be coupled to the transmission line at the AC line voltage through the gas tube switch. The reactive impedance is configured to modify the reactive power configured to be delivered to the load.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: October 9, 2018
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Xu She, James William Bray, Timothy John Sommerer, Rahul Shantilal Chokhawala
  • Patent number: 10081354
    Abstract: In a hybrid vehicle, noise occurrence caused in a rectangular wave control of a motor is restricted when a motor running mode is selected with a converter boosting limit applied. A motor controller for a hybrid vehicle mounted with an internal combustion engine and a motor as power sources is provided. The motor controller includes a converter capable of boosting a voltage supplied from a power supply device; an inverter which converts an output voltage of the converter to an AC voltage and applies the AC voltage to the motor; and a control unit which controls the inverter to drive the motor by switching between two or more control modes.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: September 25, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Ryoji Sato
  • Patent number: 10075064
    Abstract: A circuit includes a reconfigurable rectifier, a voltage balancer, and a pair of converters. The reconfigurable rectifier includes an ac input port and three output ports. In a first configuration, the reconfigurable rectifier can deliver power at a first output port and, in a second configuration, to at least a second output port. The voltage balancer includes first and second ports coupled to second and third output ports of the reconfigurable rectifier and is configured to balance received voltage at the first and second ports. The first converter has an input coupled to the first port of the voltage balancer and an output at which a first converted voltage signal is provided. The second converter has an input coupled to the second port of the voltage balancer and an output at which a second converted voltage signal is provided.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: September 11, 2018
    Assignee: Massachusetts Institute of Technology
    Inventors: David J. Perreault, Khurram K. Afridi, Juan A. Santiago-Gonzalez, David M. Otten
  • Patent number: 10075065
    Abstract: A converter circuit is provided and includes: a first EMI filter connected to AC lines and includes one or more across-the-line capacitors; a charging circuit that receives power from the first EMI filter and limits an amount of current passing from the first EMI filter to a DC bus; and a PFC circuit of a compressor drive that provides PFC between an output of the charging circuit and a generated first DC voltage. The PFC circuit includes: a rectification circuit that rectifies the power from the AC lines or a charging circuit output; and a second EMI filter connected downstream from the rectification circuit and including a DC bus rated capacitor. The second EMI filter outputs a filtered DC signal based on a rectification circuit output. The PFC circuit, based on the second EMI filter output, outputs the first DC voltage to the DC bus to power the compressor drive.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: September 11, 2018
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Joseph G. Marcinkiewicz, Kraig Bockhorst
  • Patent number: 10063067
    Abstract: A battery system includes a main control module and a battery pack. The battery pack includes a plurality of battery modules. During the transition of mode switching, each of the battery modules outputs a constant current. The battery modules monitor the battery status of the battery modules respectively. Based on a load requirement, the battery status of the battery modules and a conversion efficiency, the main control module dynamically controls a voltage conversion operation mode of a voltage converter of the battery system and dynamically controls the operation modes of the battery modules respectively.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: August 28, 2018
    Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Tzi-Cker Chiueh, Shih-Hao Liang, Kai-Cheung Juang, Shou-Hung Ling
  • Patent number: 10050443
    Abstract: A total harmonic distortion (THDi) reduction circuit for a power factor correction (PFC) controller to control a PFC stage. The THDi reduction circuit determines whether an input signal, such as an alternating current (AC) line voltage is a high voltage or low voltage signal. For a high voltage input signal, the THDi reduction circuit may limit the duty cycle of a control signal to a PFC stage to minimize a voltage spike at the zero-crossing point of the input signal and thereby minimize THDi. For a low voltage input signal, the THDi reduction circuit may extend the duty cycle of the control signal to the PFC stage, while ensuring that the control signal has at least a predetermined off-time, i.e. the duty cycle is less than 100 percent. Extending the control signal duty cycle, especially for low voltage input signals under high load, may minimize THDi.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: August 14, 2018
    Assignee: Infineon Technologies Austria AG
    Inventor: Osama Abdel-Rahman
  • Patent number: 10048730
    Abstract: In accordance with embodiments of the present disclosure, a voltage rectifier may include: an AC/DC converter, a first DC/DC converter, and a second DC/DC converter. The AC/DC converter may be configured to convert an AC source voltage to a DC bus voltage. The first DC/DC converter may be configured to convert the bus voltage to a DC compensating voltage having an AC ripple to compensate for AC ripple of the bus voltage. The second DC/DC converter may be configured to convert a DC compensated bus voltage to a DC output voltage, wherein the DC compensated bus voltage is equal to a difference between the bus voltage and the compensating voltage.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: August 14, 2018
    Assignee: Dell Products L.P.
    Inventor: Hongping Li
  • Patent number: 10044188
    Abstract: A method and a system for controlling grid power distribution by using a controllable real power resource at nodes on the feeder line and a tap changer in a substation on the feeder line by setting a target phasor value at each node that maintains a required power delivery to the real and reactive power resources with a defined acceptable voltage at all nodes with a feeder line loss below an allowable feeder line power loss threshold. The target phasor value is selected to use the substation tap changer less frequently as compared to the reactive power resource to provide voltage management of the feeder line, wherein the power resource is adjusted so that the actual voltage magnitude moves towards the target voltage magnitude at each node.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: August 7, 2018
    Assignee: ENBALA Power Networks Inc.
    Inventor: Malcom Metcalfe
  • Patent number: 10033293
    Abstract: A self-commutated converter is connected to further self-commutated converters by its AC voltage connection via an inductive component using a coupling point, which is common to all the converters, in an AC voltage network. An active power P and a frequency fN are determined from a network voltage at the coupling point and a converter current flowing via the inductive component. An active power difference value ?P is supplied to an orthogonal controller and to a parallel controller. The output value from the parallel controller is used to minimize the reactive power exchanged between converter and coupling point. The frequency difference value ?f is supplied to a frequency controller and the output value from the frequency controller is logically combined with the output value from the orthogonal controller and the output value from the parallel controller, the frequency difference value ?f being simultaneously minimized.
    Type: Grant
    Filed: August 19, 2013
    Date of Patent: July 24, 2018
    Assignee: Siemens Aktiengesellschaft
    Inventors: Paul Brian Brogan, Rodney Jones, Peter Menke, Rainer Zurowski
  • Patent number: 10033196
    Abstract: A method for converting alternating current (AC) power to direct current (DC) power in a non-isolated power converter includes receiving a three-phase power supply, transforming the three phase power supply into six voltage phases, half-wave rectifying the AC current, applying a power factor correction to achieve DC power, and outputting a DC power signal. The three-phase power supply has an AC current. The six voltage phase is transformed at a secondary side of a three-phase distribution transformer, which includes a center tap located at the secondary side of the three-phase distribution transformer and one or more AC wire conductors. The AC wire conductors carry the transformed power supply. The half-wave rectification occurs at the secondary side of the three-phase distribution transformer. An arrangement of rectifier diodes on the AC wire conductors accomplishes the half-wave rectification. The output DC power signal has an output voltage at a DC output.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: July 24, 2018
    Assignee: Google LLC
    Inventors: Sangsun Kim, Francisco Javier Elias, Cornelius Bendict O'Sullivan
  • Patent number: 10027155
    Abstract: The present disclosure relates to a power management circuit and a mobile terminal having a first switch for blocking current. The first switch blocks an input of an external power supply in a case that a predetermined load operates in a large current/voltage mode. A bi-directional DC converter boosts a battery voltage and supplies it to the load. Thus, the circuit is simplified and the number of components is reduced for power management.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: July 17, 2018
    Assignee: Silergy Semiconductor Technology (Hangzhou) Ltd.
    Inventors: Chen Zhao, Lingdong Xhang
  • Patent number: 10020736
    Abstract: A method and an information handling system (IHS) perform current calibration of a multi-phase voltage regulator (VR) by using a calibrated operating phase to calibrate an unknown operating phase. A calibration controller, using a pulse width modulation (PWM) controller, enables a first unknown operating phase within a first converter sub-circuit in the multiphase VR. The calibration controller enables a calibrated circuit component electronically coupled to the first unknown operating phase. The calibration controller determines a target voltage for the first unknown operating phase based on sense component specifications. The calibration controller determines, for the first unknown operating phase, a sense voltage that identifies the first unknown operating phase as a first evaluated operating phase.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: July 10, 2018
    Assignee: Dell Products, L.P.
    Inventors: Feng-Yu Wu, Tsai-Fu Hung, Shin-Chen Wang, Shiguo Luo, Kejiu Zhang
  • Patent number: 10015849
    Abstract: Provided are circuits and methods for use with a power supply that provides a main output including a main DC voltage having a first AC voltage ripple, or a main DC current having a first AC current ripple. A ripple cancellation converter provides a second AC voltage ripple connected in series with the main output, such that the first AC voltage ripple is substantially cancelled; or a second AC current ripple connected in parallel with the main output, such that the first AC current ripple is substantially cancelled. As a result, substantially ripple-free DC output power is provided.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: July 3, 2018
    Assignee: Queen's University at Kingston
    Inventor: Yan-Fei Liu
  • Patent number: 10008922
    Abstract: A switching power supply may include: an inductor connected to an input voltage terminal; a first switch configured to form a first electrical path between the inductor and an output voltage terminal; a second switch configured to form a second electrical path between the inductor and a ground voltage terminal; a negative current sensor configured to sense an inductor current flowing through the first electrical path, and generate an over-current protection signal when the inductor current is sensed as a negative current equal to or more than a preset value; and a controller configured to enable a discontinuous conduction mode (DCM) when the over-current protection signal is generated, and turn off the first switch and turn on the second switch, in response to the enabled DCM.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: June 26, 2018
    Assignee: SILICON WORKS CO., LTD.
    Inventors: Won Suk Jang, Young Jin Woo, Tae Kyu Nam, Hong Kyu Choi
  • Patent number: 9985565
    Abstract: Disclosed examples include motor drive power conversion systems with an inverter, as well as a controller methods to drive a motor in which output filter capacitor currents are computed and used to compensate the motor control in consideration of damping resistance values of an output filter.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: May 29, 2018
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Semyon Royak, Jingya Dai, Jingbo Liu, Thomas A. Nondahl, Ehsan Al-Nabi
  • Patent number: 9983613
    Abstract: Methods and systems of network voltage regulating transformers are provided. A network voltage regulating transformer (NVRT) may provide voltage transformation, isolation, and regulation. A NVRT may further provide power factor corrections. Multiple NVRTs may operate autonomously and collectively thereby achieving an edge of network voltage control when installed to a power system. A NVRT comprises a transformer, a VAR source, and a control module. The input current (i.e., the current through the primary side of the transformer), the output current (i.e., the current through the secondary side of the transformer), and/or the output voltage (i.e., the voltage across the secondary side of the transformer) may be monitored.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: May 29, 2018
    Assignee: Varentec, Inc.
    Inventors: Deepakraj M. Divan, Anish Prasai
  • Patent number: 9979300
    Abstract: Systems and methods for enhancing peak power capability and hold-up time in a resonant converter having a LLC topology may include a couple choke transformer circuit that may control an inductance of the couple choke transformer circuit and improve power efficiency of the resonant converter. The resonant converter may also include a resonant tank circuit that may provide improved peak power delivery of the resonant converter. The resonant converter may further include a resonant tank control circuit to control the resonant tank circuit and may increase the peak gain of the resonant converter, increase a voltage range of the input voltage, and extend a hold-up time of the input voltage when an AC power failure occurs.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: May 22, 2018
    Assignee: Dell Products L.P.
    Inventors: Merle Wood, Wei-Cheng Yu, Tun-Chieh Liang, Tsung-Cheng Liao, Wen-Yung Chang
  • Patent number: 9979202
    Abstract: A control, protection and power management system for an energy storage system, comprises an interface configured to communicate and provide energy exchange with a host power system, a local load, and the energy storage system, and processing structure configured to receive signals from the host power system and the energy storage system, to determine a mode of operation of the energy storage system and to provide control, protection and power management to the energy storage system.
    Type: Grant
    Filed: January 17, 2013
    Date of Patent: May 22, 2018
    Assignee: Ecamion Inc.
    Inventors: Himanshu Sudan, Carmine Pizzurro, Reza Iravani, Milan Graovac
  • Patent number: 9966860
    Abstract: Power conversion system and method. The system includes a first capacitor including a first capacitor terminal and a second capacitor terminal, a second capacitor including a third capacitor terminal and a fourth capacitor terminal, and a plurality of diodes including a first diode, a second diode, a third diode, and a fourth diode. The first diode is coupled to the second diode at a first node, the second diode is coupled to the fourth diode at a second node, the fourth diode is coupled to the third diode at a third node, and the third diode is coupled to the first diode at a fourth node. Additionally, the system includes a fifth diode including a first anode and a first cathode and a sixth diode including a second anode and a second cathode.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: May 8, 2018
    Assignee: ON-BRIGHT ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Yingchieh Lin, Bo Li, Lieyi Fang
  • Patent number: 9960698
    Abstract: An AC to DC converter system is provided. The system includes a bidirectional boost converter circuit coupled to an AC input, a high voltage DC link capacitor circuit coupled to the bidirectional boost converter and comprising at least one capacitor, and a DC to DC converter circuit coupled to the high voltage DC link capacitor circuit and a DC input, wherein the at least one capacitor may include a film capacitor.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: May 1, 2018
    Assignee: Flex Power Control, Inc.
    Inventors: James Michio Nagashima, Gregory Scott Smith
  • Patent number: 9948104
    Abstract: A tripolar VSC-HVDC system and method include a rectifier and an inverter formed by a three-phase six-bridge arms modular multilevel converter (MMC) respectively, and two converter valves are arranged on the DC side of the rectifier and inverter respectively. The midpoint of upper and lower converter valves of the rectifier and inverter are connected with a pole 3 DC line by a smoothing reactor. Triggering of the upper and lower converter valves is controlled to change the DC voltage polarity of the pole 3 periodically, and tripolar DC transmission is realized by modulating current orders of the three poles.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: April 17, 2018
    Assignees: NR Electric Co., Ltd., NR Electric Engineering Co., Ltd.
    Inventors: Ming Hu, Zhenxia Shao, Xinyan Jiao, Jie Tian, Yu Lu, Gang Shen
  • Patent number: 9948140
    Abstract: An improved control arrangement is used in a high power rectifier and comprises two or more power controllers ganged together in parallel. Each power controller rectifies an AC voltage signal using zero voltage crossing switching to produce a binary switched signal and each power controller is connected to an independent connectable load. Each power controller includes a fast acting binary power switch that selectively connects the respective independent connectable load to the rectified AC voltage signal. The control arrangement selectively activates the power controllers to define a desired connected load. This high power rectifier and control arrangement is advantageously used to provide fast up down power regulation to a grid by selective storage of thermal energy and deriving power from the thermal energy storage system to add fill in power to the grid.
    Type: Grant
    Filed: April 12, 2013
    Date of Patent: April 17, 2018
    Assignee: Kelvin Thermal Energy Inc.
    Inventors: Anton Pietsch, George Lynch, Stephen B. Sutherland
  • Patent number: 9941785
    Abstract: A power factor correction circuit and an electronic product including the same are disclosed. This technology configures a bridgeless circuit with no rectifier diode by using an additional switch, eliminating conduction loss due to the diode and reducing common mode EMI noise of the power factor correction circuit. A power factor correction circuit includes at least one inductor directly connected to an AC input stage, an output capacitor to smooth the output voltage, first switching elements to control current to store magnetic energy in the inductor, and a second switching element to maintain a substantially constant voltage between a ground voltage of an AC input stage and a ground voltage of an output stage.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: April 10, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jin-Han Kim, Han Sol Seo, Bo Hyung Cho, Paul Jang, Sang Woo Kang
  • Patent number: 9906027
    Abstract: A method is provided for transferring electrical power. AC power is generated and guided at least partially underwater. The AC power is guided through a cable from a first end of the cable to a second end of the cable. A frequency of the AC power guided through the cable is adjusted in dependence of a length of the cable between the first end and the second end of the cable.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: February 27, 2018
    Assignee: Siemens Aktiengesellschaft
    Inventors: Ove Boe, Espen Haugan