Including Plural Sensing Or Control Means Patents (Class 363/79)
  • Patent number: 10390404
    Abstract: An electronic converter, including a measurement circuit for determining a first signal indicative of the voltage or current supplied by the electronic converter, a regulation circuit for generating a regulation signal as a function of the first signal and one or more reference signals, and a driver circuit for driving the switching stage of the electronic converter as a function of the regulation signal. The electronic converter includes an optical, inductive or capacitive coupler and a transmission circuit configured to generate a pulse width modulated signal applied to the input of the optical, inductive or capacitive coupler, wherein the transmission circuit varies the duty cycle and the frequency of the pulse width modulated signal as a function of the first and second signal. The electronic converter includes a receiver circuit configured to monitor the received signal at the output of the optical, inductive or capacitive coupler.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: August 20, 2019
    Assignee: OSRAM GMBH
    Inventor: Daniele Luccato
  • Patent number: 10178731
    Abstract: Systems and methods of driving a light source, such as a light emitting diode (LED), while minimizing power consumption. Different techniques can be implemented in circuits that eliminate the traditional need for a sense resistor. By eliminating the sense resistor, a LED driving circuit's efficiency can be improved by up to and exceeding 30%. A pulse-width modulator can be used to control current flow in a buck, boost, or buck-boost circuits. Many of the configurations discussed eliminate the need for a sense resistor, which needlessly dissipates power. Others use a sense resistor minimally compared to traditional LED driving circuits.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: January 8, 2019
    Assignee: LUMINARA WORLDWIDE, LLC
    Inventors: Douglas Patton, Kanchana Sanjaya Gunesekera Karunaratne
  • Patent number: 9985305
    Abstract: The object of the present invention is to balance: the suppression of deterioration of a fuel cell and degradation of its durability and the optimization of the output control of the fuel cell. The present invention provides an output control apparatus for a fuel cell, being capable of switching a control mode between a power control mode in which an output power of a fuel cell connected to a load is controlled so as to be at a target power and a voltage control mode in which an output voltage of the fuel cell is controlled so as to be at a target voltage, wherein a control in the voltage control mode is performed when the output voltage of the fuel cell decreases below a predetermined low voltage threshold value.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: May 29, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Tomohiko Kaneko
  • Patent number: 9781806
    Abstract: A light-emitting diode (LED) driving device and a short protection method for a driving device are provided. The driving device includes an LED module, a driving circuit, a reference voltage setting circuit, a voltage comparison circuit, and a power supply. A first node of the LED module receives a lighting voltage, and a second node of the LED module has a first voltage. The reference voltage setting circuit receives the lighting voltage to generate a reference voltage. The voltage comparison circuit determines whether the first voltage is greater than the reference voltage when the LED module is turned off. When the first voltage is greater than the reference voltage, the voltage comparison circuit generates a short signal. The power supply supplies power to the LED module and determines whether to shut down the power of the LED driving device according to the short signal.
    Type: Grant
    Filed: November 24, 2016
    Date of Patent: October 3, 2017
    Assignee: Wistron Corporation
    Inventors: Shih-Chi Yeh, Ju-Hsing Hu, Pei-Chi Tsai, Wei-Chiuan Huang
  • Patent number: 9770991
    Abstract: Systems and methods are provided for charging a battery. The system, for example, includes, but is not limited to a first interface configured to receive a voltage from an AC voltage source, a matrix conversion module comprising a plurality of switches electrically connected to the first interface and configured to provide a charging voltage to the battery, and a controller communicatively connected to the matrix conversion module, wherein the controller is configured to: determine a voltage of the battery, determine an angle of the AC voltage source to initiate charging of the battery based upon the voltage of the battery, and control the plurality of switches to provide the charging voltage to the battery between the determined angle of the AC voltage source and a subsequent zero-crossing of the AC voltage source.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: September 26, 2017
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Milun Perisic, Ray M. Ransonm, Lateef A. Kojouke
  • Patent number: 9762133
    Abstract: A power conversion apparatus for converting AC power supplied from an AC power source to DC power includes an AC-DC conversion circuit connected with the AC power source at an input end thereof for converting the AC power to DC power, a DC-DC conversion circuit connected with an output end of the AC-DC conversion circuit at an input end thereof for converting DC voltage level of the DC power generated by the AC-DC conversion circuit, a smoothing capacitor parallel connected to the output end of the AC-DC conversion circuit and the input end of the DC-DC conversion circuit, a DC link voltage detector for detecting a voltage of the smoothing capacitor as a DC link voltage, and a control unit for controlling operation of the DC-DC conversion circuit. The control unit suppresses an output power of the DC-DC conversion circuit, if the DC link voltage is smaller than a predetermined value.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: September 12, 2017
    Assignee: DENSO CORPORATION
    Inventors: Yuuichi Handa, Seiji Iyasu, Kimikazu Nakamura
  • Patent number: 9263932
    Abstract: A DC-DC converter includes: an error amplifier for outputting an error between an output voltage and a predetermined voltage; a phase compensation impedance element for accumulating the error across one end to generate an error phase; a determination unit for determining whether the voltage output by the error amplifier is higher, or lower than a reference voltage that is consonant with the predetermined voltage, and outputting a determination signal indicating determination results; and a voltage setting unit for setting a voltage for one end of the phase compensation impedance element higher than a lower output voltage limit for the error amplifier when the determination signal indicates that the voltage output by the error amplifier is lower than the reference voltage, or for canceling setting of the voltage when the determination signal indicates that the voltage output by the error amplifier is higher than the reference voltage.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: February 16, 2016
    Assignee: Asahi Kasei Microdevices Corporation
    Inventor: Satoru Ito
  • Patent number: 9235226
    Abstract: A method for determining a maximum power point (MPP) of a photovoltaic generator (PV) by variation of at least one parameter of search voltage and search current, within a maximally searchable search area on a power/voltage curve is disclosed. The method includes initializing by defining a start point with a start voltage and a start current, searching for the maximum power point (MPP) in at least one search direction by repeated variation of the search voltage or search current in the search area taking account of at least two limiting conditions for limiting the search area, wherein at least one of the limiting conditions for limiting the search area are is determined with evaluation of parameters provided in an operating state already attained during the search, and ending the search if one of the at least two limiting conditions for limiting the search area is met.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: January 12, 2016
    Assignee: SMA Solar Technology AG
    Inventors: Jens Klein, Gerd Bettenwort, Markus Hopf
  • Patent number: 9214809
    Abstract: Methods, apparatus, and products for dynamically configuring current sharing and fault monitoring in redundant power supply modules for components of an electrically powered system, including summing, by a master service processor, during powered operation of the system, the present power requirements of components presently installed in the electrically powered system and setting, by the master service processor for each redundant power supply module in dependence upon the sum of the present power requirements, a current sharing tolerance and a fault reporting tolerance.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: December 15, 2015
    Assignee: Lenovo Enterprise Solutions (Singapore) Pte. Ltd.
    Inventors: Jerrod K. Buterbaugh, Timothy C. Daun-Lindberg
  • Patent number: 9143082
    Abstract: In a light power generation system, a control device, a control method, and a program, efficient power can be supplied. The maximum power detection unit operates a MOSFET in a power converter circuit and open-circuits both ends of a solar cell panel in the maximum power detection mode. After that, the maximum power detection unit short-circuits both ends of the solar cell panel, detects a maximum power by monitoring the output power of the solar cell panel during a period from the open state to the short-circuited state, and defines the voltage of the solar cell panel as an optimal voltage when detecting the maximum power. In a tracking operation mode, the control unit performs PWM control with respect to the MOSFET by defining the optimal voltage to be a reference signal. Operations are repeated between the maximum power detection mode and the tracking operation mode.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: September 22, 2015
    Assignee: SCHOOL JUDICAL PERSON IKUTOKUGAKUEN
    Inventor: Kazutaka Itako
  • Patent number: 9130390
    Abstract: In some embodiments, a power extractor utilizes power transfer circuitry with analysis circuitry to detect a power slope and to control the magnitude of the current in response to the detected power slope. The power analysis circuitry may increase the current as long as the power slope shows an increase in power and may decrease the current as long as the power slope shows a decrease in power. The magnitude of the current is responsive to the duty cycle of the switching circuitry and to the detected power slope. Other embodiments are described and claimed.
    Type: Grant
    Filed: July 7, 2007
    Date of Patent: September 8, 2015
    Inventors: David A. Besser, Stefan Matan
  • Patent number: 9088670
    Abstract: A cell phone charger comprises a main body having embedded therein a charging circuit configured to receive line AC voltage and to convert it to a DC voltage suitable for charging the mobile device. AC prongs fold into the body in a stowed position and a connection structure formed integrally with the main body grasps onto and holds the charger secured to the cell phone device. In a preferred embodiment, the AC prongs pivot independently and lie flat against an outside surface of the main body.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: July 21, 2015
    Inventors: Yeoshua Sorias Sorias, Max Moskowitz
  • Patent number: 9052733
    Abstract: A method is provided for determining a value for an electrical output of a converter of renewable energy. The method comprises obtaining a signal representing the electrical output of the converter wherein that electrical output has an initial value. The method further comprises applying a pulse signal to the signal representing the electrical output, wherein the pulse signal comprises a positive portion and a negative portion. The method further comprises obtaining a measurement of electrical power produced by the converter during application of the pulse signal, removing the pulse signal and then obtaining a measurement of electrical power produced by the converter in the absence of the pulse signal. An error value is determined from the obtained electrical power measurements and that error value is applied to the initial value to obtain a target value for the electrical output of the converter.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: June 9, 2015
    Assignee: CONTROL TECHNIQUES LTD
    Inventors: Scott Alan Meredith-Jones, Stephen Turner, Michael Cade
  • Patent number: 8976542
    Abstract: A high frequency cathode heater supply for a microwave source includes a SMPS inverter and an isolation transformer having a primary winding arranged to be powered by the SMPS inverter, a monitor winding passing through primary core assemblies of the primary winding and a secondary winding arranged for connection to the cathode heater. A current monitor is arranged to monitor a current in the primary windings. Signal processing modules are arranged to receive a first input signal from the monitor winding indicative of a voltage across the cathode heater and a second input signal from the current monitor indicative of a current through the cathode heater. The signal processing modules are arranged to output a control signal to the SMPS inverter to control power supplied to the cathode heater dependent on a monitored resistance of, or monitored power supplied to, the cathode heater as determined from the first input signal and the second input signal.
    Type: Grant
    Filed: November 11, 2010
    Date of Patent: March 10, 2015
    Assignee: E2V Technologies (UK) Limited
    Inventors: Robert Richardson, Michael Bland, Colin Bennett
  • Patent number: 8971077
    Abstract: A power supply circuit includes: a first switch and a second switch that are connected in series between an input voltage terminal and a reference power supply; a controller that controls the first and second switches to be turned on and off by turns; a comparator that has an inverting input terminal connected to a voltage supply and that has a non-inverting input terminal connected to a first terminal of a capacitor; a third switch that is provided between an output terminal and the non-inverting input terminal of the comparator; a fourth switch that is provided between a connection node of the first and second switches, and a second terminal of the capacitor; and a latch circuit that detects change of output of the output terminal of the comparator and controls the second switch to be turned off.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: March 3, 2015
    Assignee: Fujitsu Limited
    Inventor: Hiroyuki Nakamoto
  • Patent number: 8929108
    Abstract: A method and an apparatus for controlling a grid-connected converter which includes a boost converter, a buck converter, and a current source inverter having an output CL filter. An input of the buck converter input is connected to an output of the boost converter, and an input of the current source inverter is connected to an output of the buck converter. The method includes controlling a boost converter input voltage, controlling a boost converter output voltage through control of a buck converter output voltage, and controlling the current source inverter to produce an AC current from the buck converter output voltage. The apparatus implements the method.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: January 6, 2015
    Assignee: ABB Research Ltd
    Inventors: Gerardo Escobar, Ngai-Man Ho, Sami Pettersson
  • Publication number: 20150002020
    Abstract: A physical vapor deposition system may include an RF generator configured to transmit an AC process signal to a physical vapor deposition chamber via an RF matching network. A detector circuit may be configured to sense the AC process signal and output a DC magnitude error signal and a DC phase error signal. A controller may be coupled to the detector circuit and the RF matching network and configured to receive the DC magnitude and phase error signals and to vary an impedance of the RF matching network in response to the DC magnitude and phase error signals.
    Type: Application
    Filed: August 11, 2014
    Publication date: January 1, 2015
    Applicant: COMET TECHNOLOGIES USA, INC.
    Inventor: Gerald E. Boston
  • Patent number: 8923025
    Abstract: Apparatus and methods in accordance with this invention provide a multi-cell power supply for receiving power from a source and delivering power at an output terminal to a load. The multi-cell power supply includes a first power cell coupled to the source, and a first current sensor circuit. The first power cell provides a first output current, and includes a first output terminal coupled to a reference node of the multi-cell power supply, and a second output terminal coupled to the output terminal. The first current sensor circuit includes a first current sensor and a power supply. The first current sensor is coupled to the first output terminal of the first power cell, and measures the first output current. The power supply is coupled to either the reference node or a floating ground node of the first power cell, and provides power to the first current sensor.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: December 30, 2014
    Assignee: Siemens Industry, Inc.
    Inventors: Mukul Rastogi, Daniel Edward Erb, Edward Alan Cheesman
  • Patent number: 8913408
    Abstract: A power supply device includes an SMPS circuit including an electric transformer having first and second stages, the SMPS circuit generating a second stage output voltage using the electric transformer, a power switcher receiving and switching the second stage output voltage to generate a first power voltage having logic high and low levels in one frame, and a PWM controller controlling a voltage level of the second stage output voltage by providing a control signal to the first stage. The first power voltage is simultaneously provided to a plurality of pixels, and a magnitude of the logic low level is increased or decreased according to a magnitude of an image load, where the magnitude of the image load is dependent on a color and a gradation level of an image to be displayed in a next frame.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: December 16, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventor: Hak-Ki Choi
  • Publication number: 20140362617
    Abstract: Systems and methods for performing vector control of grid-connected power electronic converters using a neural network are described herein. Optionally, the grid-connected power electronic converters can be used in renewable and electric power system applications. In order to improve performance and stability under disturbance conditions, integrals of error signals can be introduced as inputs to the neural network. Alternatively or additionally, grid disturbance voltage can be introduced to an output of a trained neural network.
    Type: Application
    Filed: June 9, 2014
    Publication date: December 11, 2014
    Applicant: The Board of Trustees of The University of Alabama
    Inventor: Shuhui Li
  • Patent number: 8901416
    Abstract: A power supply assembly which can drive a number of different devices at different voltages. A rack holds a number of breaker modules, and each breaker module can connect to one or many breakout boxes. The breakout boxes are keyed to the breaker modules, so that the breaker boxes will not be energized with power unless they are the proper voltage and/or configuration to receive that power. The coil of a contactor in the breaker module is powered by a key wire that is connected through specified pins in the breakout box. Therefore, no power is ever provided to the breakout box unless it is of the proper voltage configuration. In addition, feeder power to the power supply assembly is provided over bolted connections, without any wire connections between the power feed and the circuit breaker.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: December 2, 2014
    Assignee: Production Resource Group, L.L.C.
    Inventors: James Bornhorst, John Covington
  • Patent number: 8879287
    Abstract: Apparatus and methods in accordance with this invention provide a multi-cell power supply for receiving power from a source and delivering power at an output terminal to a load. The multi-cell power supply includes a first power cell coupled to the source, and a first current sensor circuit. The first power cell provides a first output current, and includes a first output terminal coupled to a reference node of the multi-cell power supply, and a second output terminal coupled to the output terminal. The first current sensor circuit includes a first current sensor and a power supply. The first current sensor is coupled to the first output terminal of the first power cell, and measures the first output current. The power supply is coupled to either the reference node or a floating ground node of the first power cell, and provides power to the first current sensor.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: November 4, 2014
    Assignee: Siemens Industry, Inc.
    Inventors: Mukul Rastogi, Daniel Edward Erb, Edward Alan Cheesman
  • Patent number: 8867245
    Abstract: A switching power supply comprises one or more power supply stages that receive power from an input power source and that generate a regulated output voltage for powering a load. A controller monitors at least the regulated output voltage and generates at least one switch control signal for alternately opening and closing a switch so as to regulate the regulated output voltage. A monolithic integrated circuit is coupled to receive the switch control signal. The monolithic integrated circuit is separate from the controller and comprises a plurality of transistors capable of operation at voltage levels that are at least one order of magnitude higher than voltage levels within the controller integrated circuit.
    Type: Grant
    Filed: September 27, 2010
    Date of Patent: October 21, 2014
    Assignee: Champion Microelectronic Corporation
    Inventor: Jeffrey Hwang
  • Patent number: 8848327
    Abstract: Disclosed is a controller for controlling short-circuit across positive and negative terminals of a dye sensitized solar cell for converting a light energy into an electrical energy. The controller includes: a voltage detecting section detecting a voltage developed across the positive and negative terminals of the cell; a current detecting section detecting a current caused to flow through the positive terminal of the cell; a judging section judging how a power generation state of the cell is, and whether or not a release state is provided across the positive and negative terminals of the cell in accordance with a value of the voltage detected by the voltage detecting section and a value of the current detected by the current detecting section; and a short-circuiting/releasing section short-circuiting or releasing across the positive and negative terminals of the cell in accordance with a result of the judgment made by the judging section.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: September 30, 2014
    Assignee: Sony Corporation
    Inventors: Atsushi Sato, Yoshiaki Inoue, Mikio Takenaka
  • Patent number: 8848409
    Abstract: A converter includes an active stage for converting an AC input voltage at an AC input into an intermediate DC voltage, and a DC/DC converter for transforming the intermediate DC voltage into an output DC voltage at a DC output. The DC/DC converter has a resonant transformer formed by a resonant circuit and a transformer. The converter also includes control unit configured to actively operate the active stage only based on an output DC voltage of the DC/DC converter, an input voltage, and an input current of the converter, and to operate the DC/DC converter in an open loop mode. A method for operating such a converter is also provided.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: September 30, 2014
    Assignee: ABB Technology AG
    Inventors: Drazen Dujic, Francisco Canales, Akos Mester
  • Patent number: 8805629
    Abstract: A maximum-power-point tracking device is provided for a solar electric-generation system that includes a solar battery and a DC/DC converter connected to the solar battery. The device includes a sampling module configured to detect output current and voltage values of the solar battery. A controlling module is configured to calculate a target current value according to the output current and voltage values and a preset current value, and output a controlling signal for controlling the value of a current according to the output current of the solar battery and the target current value. The device also includes a driving module configured to receive the controlling signal from the controlling module and output a driving signal to adjust a output current value of the DC/DC converter to close to the target current value and adjust an output power of the DC/DC converter.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: August 12, 2014
    Assignee: BYD Company Limited
    Inventors: Shaowen Yin, Xiang Zhang, Rongchun Yang
  • Patent number: 8791399
    Abstract: An object of the invention is to accurately detect a state of an object to be heated in a cooking vessel and effectively avoid cooking failure. An induction heating section (13) inductively heats a cooking vessel (11). A vibration detecting section (14) detects a vibration of the cooking vessel (11) via a top plate (12). A vibration waveform extracting section (15) extracts a vibration waveform of a frequency component having a frequency equal to a predetermined multiplication product of an induction heating frequency, from a waveform of the vibration detected by the vibration detecting section (14). A determining section (16) determines a state of an object to be heated, based on the vibration waveform extracted by the vibration waveform extracting section (15).
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: July 29, 2014
    Assignee: Panasonic Corporation
    Inventors: Sachio Nagamitsu, Makiko Noda
  • Publication number: 20140092657
    Abstract: An operation control apparatus includes a criterion calculator that obtains an operation criterion for the power converter, based on the voltage detected by the above voltage detector on the side of the alternating-current power system, a direct-current voltage detector that detects a direct-current output voltage of the solar battery, and an operation determination device that compares the direct-current output voltage detected by the direct-current voltage detector with the operation criterion obtained by the criterion calculator, and supplies the power converter with an operation command if the direct-current output voltage is greater than the operation criterion.
    Type: Application
    Filed: December 6, 2013
    Publication date: April 3, 2014
    Inventor: Yosuke FUJII
  • Patent number: 8681515
    Abstract: An energy generation system includes an inverter for converting a DC voltage into an AC voltage, a three-phase/two-phase transformer for transforming an output of the inverter into a three-phase/two-phase stationary coordinate system, a phase locked loop for calculating the phase and frequency of an output voltage of the inverter, a phase shifter for generating a current phase reference value, a current reference coordinate transformer for transforming the current phase reference value and the current amplitude reference value into a two-phase stationary coordinate system, a current phase calculator for outputting a current phase calculation value, a current phase calculator for outputting a current amplitude calculation value, a current adjuster for generating a current adjustment signal, an output three-phase transformer for transforming the current adjustment signal into a current adjustment signal in a three-phase stationary coordinate system, and a PWM controller for outputting a PWM control signal.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: March 25, 2014
    Assignee: Kaco New Energy Inc.
    Inventors: Young Sang Bae, Seong Jin Oh, Kyoung Hwan Kim
  • Patent number: 8665620
    Abstract: A timing circuit of a controller generates a clock signal having a switching period for use by a pulse width modulation (PWM) circuit to control a switch of a power supply. The switching period of the clock signal is based on a charging time plus a discharging time of a capacitor included in the timing circuit. A first current source charges the capacitor while the timing circuit is in a normal charging mode. A second current source charges the capacitor while the timing circuit is in an alternative charging mode that is when the on time of the switch exceeds a threshold time. The current provided by the second current source is less than the current provided by the first current source such that the switching period of the clock signal is increased in response to the timing circuit entering the alternative charging mode.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: March 4, 2014
    Assignee: Power Integrations, Inc.
    Inventors: Stefan Bäurle, Guangchao Zhang, Arthur B. Odell, Edward E. Deng
  • Patent number: 8653783
    Abstract: A circuit switching element is provided that switches a step-up/step-down bidirectional chopper circuit, arranged between a DC bus and a power storage element, to a first chopper circuit or to a second chopper circuit, whose step-up and step-down characteristics are in a complementary relation. The first and second chopper circuits are used together at a time of charge and discharge. Accordingly, an AC motor drive device having mounted therein a power storage system is obtained, in which the power storage system can perform charge and discharge to and from the power storage element, regardless of a bus voltage and can increase energy use efficiency.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: February 18, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Manabu Ohashi, Kazuya Nakamura
  • Publication number: 20130336030
    Abstract: There is provided a solar power generation system including a solar cell, an inverter converting a direct current power generated by the solar cell into an alternating current power, a system voltage measurement unit measuring a system voltage, a voltage drop detector detecting a voltage drop of a power system, based on the system voltage, a first direct current voltage controller controlling a direct current voltage of the inverter to enhance a power generation efficiency of the solar cell, when the voltage drop is not detected, and a second direct current voltage controller controlling the direct current voltage of the inverter to suppress a current output from the inverter, when the voltage drop is detected.
    Type: Application
    Filed: August 22, 2013
    Publication date: December 19, 2013
    Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Ruben Alexis Inzunza FIGUEROA, Eiichi IKAWA, Takeshi SUMIYA
  • Patent number: 8570776
    Abstract: A method is provided for determining a control scheme for a voltage source converter (VSC) with a topology of three bridge legs between each of three phases of a grid and a neutral point. The method includes: analyzing the waveform of the grid and/or a load voltage and determining an allowed period for no-swilching of the corresponding bridge leg; operating the VSC with different clamping carrier modulator frequencies, and then analyzing the balance in the operating junction temperatures and/or power losses across the active switches and also analyzing the total losses of the VSC; comparing the balance and the total losses of different clamping carrier modulator frequencies and selecting the clamping carrier modulator frequency; operating the VSC with the selected clamping carrier modulator frequency, and optimizing the balance in the operating junction temperatures and/or power losses across the active switches and the total losses of the VSC.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: October 29, 2013
    Assignee: ALSTOM Technology Ltd
    Inventors: Johann W. Kolar, Thiago Soeiro, Per Ranstad, Jörgen Linner
  • Patent number: 8559201
    Abstract: A grid-connected inverter includes first and second power conversion circuits, a contactor and a control circuit. The first conversion circuit converts a first DC voltage to a second DC voltage. The second conversion circuit converts the second DC voltage to an AC voltage. The contactor connects an output side of the second conversion circuit to a power system. The control circuit includes a decision circuit and controls start and stop operations of the conversion circuits, and opening and closing of the contactor. The decision circuit decides whether a condition of the contactor is abnormal by detecting, after the control circuit controls the contactor to be open, whether or not a value of the second DC voltage is less than a threshold value, and if the value of the second DC voltage is detected to be not less than the threshold value, decides that the condition of the contactor is abnormal.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: October 15, 2013
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Kansuke Fujii, Toshiya Yamada, Masaki Katoh
  • Patent number: 8531853
    Abstract: An example integrated circuit controller includes a pulse width modulation (PWM) circuit and a timing circuit. The PWM circuit controls a switch to regulate an output of a power supply in response to a switch current flowing through the switch and in response to a clock signal having a switching period. The timing circuit provides the clock signal and includes a timing capacitor where the switching period of the clock signal is equal to a charging time that the timing capacitor charges to an upper reference voltage plus a discharging time that the timing capacitor discharges to a lower reference voltage. The timing circuit increases the charging time of the timing capacitor by decreasing a rate at which the timing capacitor is charged to increase the switching period of the clock signal if an on time of the switch is greater than or equal to a threshold time.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: September 10, 2013
    Assignee: Power Integrations, Inc.
    Inventors: Stefan Bäurle, Guangchao Darson Zhang, Arthur B. Odell, Edward Deng
  • Patent number: 8503205
    Abstract: Disclosed is a power converter including a power factor corrector and a DC/DC converter and a power conversion method.
    Type: Grant
    Filed: October 26, 2012
    Date of Patent: August 6, 2013
    Assignee: Infineon Technologies AG
    Inventors: Andrea Carletti, Albino Pidutti
  • Patent number: 8503204
    Abstract: A power converter includes a DC/AC converter with input terminals and output terminals. A DC/DC converter includes input terminals for receiving a DC input voltage and output terminals for providing a DC output voltage. The output terminals are coupled to the input terminals of the DC/AC converter. The DC/DC converter also includes a control circuit that is configured to control an output current of the DC/DC converter dependent on a reference signal. The reference signal has a frequency that is dependent on a frequency of the AC output voltage.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: August 6, 2013
    Assignee: Infineon Technologies AG
    Inventors: Andrea Carletti, Albino Pidutti
  • Patent number: 8493757
    Abstract: Disclosed is a power converter including a power factor corrector and a DC/DC converter and a power conversion method.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: July 23, 2013
    Assignee: Infineon Technologies AG
    Inventors: Andrea Carletti, Albino Pidutti
  • Patent number: 8471409
    Abstract: The present invention discloses a power conversion circuit. A control module controls a pulse width modulation regulator to regulate a duty cycle of a DC-DC converter according to the direct current link voltage of the DC-DC converter and the output current and voltage of a renewable power supply. The control module also controls the pulse width modulation regulator to regulate a duty cycle of a DC-AC inverter according to the direct current link voltage of the DC-DC converter, output voltage of a utility power supply, and the output current and voltage of the renewable power supply.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: June 25, 2013
    Assignee: Chung-Hsin Electric and Machinery Manufacturing Corp.
    Inventors: Jin-Ming Chang, Zhan-Yi Lin, Chen-Kun Chou, Yu-Ming Sun, Chi-Bin Wu
  • Patent number: 8369117
    Abstract: There is provided an integrated control method for eliminating a low frequency ripple in a power conversion system for a fuel cell, more particularly, a control method of a power conversion system capable of eliminating a low frequency ripple, controlling a DC link voltage, and controlling an output power and a system using the same control method. A power conversion system (PCS) that converts an output of a DC power supply received from an external power supply includes a converter that converts a voltage of the input power supply; an inverter that converts an output voltage of the converter into an AC voltage; and a converter control module that outputs a PWM signal for controlling a switch of the converter, and after receiving a power instruction value, the converter control module generates the PWM signal for controlling the converter based on the power instruction value.
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: February 5, 2013
    Assignee: Sungyunkwan University Foundation for Corporate Collaboration
    Inventors: Byoung Kuk Lee, Jong Soo Kim, Hyun Soo Kang, Gyu Yeong Choe
  • Patent number: 8310851
    Abstract: The invention relates to a method for operating an inverter comprising a step-up device which is upstream-connected by means of an intermediate circuit and is connectable to a direct-current source with a variable reference sampling current wherein said inverter and the step-up device are provided with an efficiency optimizing working area, respectively. When the variable reference sampling current is raised and the step-up device approaches a pulse duty factor value, the intermediate circuit voltage is reduced and the variable reference sampling current is stabilized, said intermediate circuit voltage is re-raised. When the direct-current source is in a permanent operational state, the inverter and the step-up device operate in the efficiency optimizing working area thereof, respectively.
    Type: Grant
    Filed: January 30, 2006
    Date of Patent: November 13, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Lorand Cesnak, Harald Kernstock, Markus Kogard
  • Publication number: 20120268039
    Abstract: A power supply and methods are provided. In one implementation, the power supply includes a switching converter with power feedback circuit to output constant power to keep lamp at constant brightness. The power feedback circuits include a current feedback circuit and a voltage feedback circuit. The power supply further includes a controller operable to adjust on time or duty cycle of main switch to keep the output power constant.
    Type: Application
    Filed: April 20, 2011
    Publication date: October 25, 2012
    Inventor: Liang Chen
  • Patent number: 8295067
    Abstract: The invention relates to a power converter comprising, in particular, a rectifier comprising at least one switching leg provided with two transistors (T1-T6) connected in series. The transistors (T1-T6) are of the normally ON field-effect type, for example JFETs, and are each controlled by a gate control device (CT1-CT6). Each gate control device comprises, in particular: an output (OUT1) connected to the gate (G) of the controlled transistor, a voltage rectifier element connected between the output of the control device and an input (in1, in3) of the converter, a capacitor (C11) connected between the source (S) of the transistor and a point situated between the output of the control device and the voltage rectifier element.
    Type: Grant
    Filed: May 17, 2010
    Date of Patent: October 23, 2012
    Assignee: Schneider Toshiba Inverter Europe SAS
    Inventor: Petar Grbovic
  • Patent number: 8284578
    Abstract: The DC power supply apparatus includes a switching operation control part that is provided between a current detection part to detect a current flowing through a primary coil of a transformer and a control part to control the operation of a switching part and controls the operation of the switching part according to an output voltage so that consumption power in a low-load state can be further reduced.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: October 9, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventor: Keisuke Samejima
  • Patent number: 8227935
    Abstract: To provide a hybrid power supply device capable of properly controlling an operation of an engine generator and also preventing the device from increasing in size. The power supply device including an engine generator 11 and a capacitor 15 comprises: a DC bus La having the engine generator 11 and the capacitor 15 connected in parallel and supplying electric power to an outside; a step-up converter 13 provided between the DC bus La and the engine generator 11; and a control section 17 controlling the step-up converter 13 and regulating electric power supplied from the engine generator 11 to the DC bus La. Since both of the engine generator 11 and the capacitor 15 can supply electric power to the outside, the engine generator 11 can be downsized.
    Type: Grant
    Filed: April 15, 2008
    Date of Patent: July 24, 2012
    Assignee: Sumitomo Heavy Industries Engineering & Services Co., Ltd.
    Inventor: Noriyuki Nishiyama
  • Patent number: 8223522
    Abstract: A regulated power supply apparatus is provided. The apparatus includes an input power converting circuit for generating a rectified voltage signal, an output power converting circuit comprising a plurality of switching elements, the output power converting circuit coupled to receive the rectified voltage signal, an output power storing element coupled with the output power converting circuit, and an output power bidirectional regulating circuit comprising an integrated circuit coupled with the output power converting circuit, the bidirectional regulating circuit including control signals for operating the switching elements to store power on the output power storing element and to deliver power to an output load from the output power storing element. An integrated circuit controlled regulator circuit is provided for controlling a plurality of switches a boost and buck converter. A method of regulating power supply is also provided.
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: July 17, 2012
    Assignee: Flextronics AP, LLC
    Inventor: Mark D. Telfus
  • Publication number: 20120176824
    Abstract: In a first aspect, a digital control circuit is provided for use with a switch-mode power converter that receives an input signal at a first input node and a control signal at a second input node, and that provides an output signal at a first output node and a current signal at a second output node. The digital control circuit generates a programmable current reference signal based on a difference between the output signal and a voltage reference signal, calculates a time instant when the current signal substantially equals the programmable reference current signal, and generates the control signal based on the calculated time instant. Numerous other aspects are also provided.
    Type: Application
    Filed: January 6, 2011
    Publication date: July 12, 2012
    Inventors: Chris Michael Franklin, Brent Alan McDonald, John Christian Vogt
  • Patent number: 8193660
    Abstract: An HVAC/R system is configured with power storage for power back-up to maintain substantially uninterrupted power in the case of a main power failure. The power back-up system has a DC power source configured to be recharged, and provides power to the HVAC/R components.
    Type: Grant
    Filed: July 27, 2009
    Date of Patent: June 5, 2012
    Assignee: Rocky Research
    Inventors: Uwe Rockenfeller, Paul Sarkisian, Kaveh Khalili, Warren Harhay
  • Publication number: 20120075892
    Abstract: Control systems, methods and power conversion systems are presented for reducing common mode voltages in AC motor loads driven by inverter PWM control using switching sequences with only active vectors where a first vector of each switching sequence differs by one phase switching state from a last vector of a switching sequence of an adjacent sector, along with enhanced deadtime compensation and reflected wave reduction techniques in providing pulse width modulated switching signals to a switching inverter.
    Type: Application
    Filed: September 29, 2010
    Publication date: March 29, 2012
    Applicant: Rockwell Automation Technologies, Inc.
    Inventors: Rangarajan M. Tallam, Russel J. Kerkman, David Leggate
  • Patent number: 8130520
    Abstract: The present invention is directed to largely improve the efficiency at the time of light load of a power supply apparatus using a power factor correction (PFC) controller. A PFC controller is provided with a voltage-current converter. The voltage-current converter converts voltage of a signal output from an error amplifier for detecting voltage level of output voltage to an arbitrary current value and outputs the current value as a correction current. The voltage-current converter outputs a correction current of a large current value when the error amplifier detects that the load is light, and the PFC controller performs control to decrease the output voltage.
    Type: Grant
    Filed: March 9, 2009
    Date of Patent: March 6, 2012
    Assignee: Renesas Electronics Corporation
    Inventors: Kazuhito Ayukawa, Nobutoshi Kasai