Current Conversion Patents (Class 363/13)
  • Patent number: 10097082
    Abstract: An integrated circuit power factor controller includes a pulse width modulator and a line sensing circuit. The pulse width modulator has a first input for receiving a feedback signal, a second input for receiving a line sense signal, and an output for providing a drive signal having a duty cycle formed in response to the feedback signal and the line sense signal. The line sensing circuit has an input for receiving the drive signal, and an output coupled to the second input of the pulse width modulator for providing the line sense signal. The line sensing circuit forms the line sense signal in response to measuring a duty ratio of the drive signal. In another form, an offline converter includes an integrated circuit power factor controller that provides a line sense signal in response to a duty ratio of the drive signal without measuring a voltage on the input line.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: October 9, 2018
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Joel Turchi, Christophe Basso
  • Patent number: 10097033
    Abstract: The present invention relates to an electrical appliance comprising an electronic control unit (6) and a power circuit (7) supplying power to said electronic control unit (6), the power circuit (7) comprising a soft on/off switch (1) for turning on and off the electrical appliance, the soft on/off switch (1) being connected electrically in parallel with a relay (2) and a rectifier (3). The power circuit (7) further comprises an electrical node connecting the soft on/off switch (1) and the rectifier (3) to a button sensing circuit (4) and to an AC/DC converter (5) together.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: October 9, 2018
    Assignee: ARCELIK ANONIM SIRKETI
    Inventors: Oner Hatipoglu, Ahmet Ihsan Yuce
  • Patent number: 10008924
    Abstract: An integrated circuit power factor controller includes a feedback input terminal for receiving a feedback signal representative of an output voltage, a control terminal for receiving an error signal and adapted to be coupled to a compensation network, a drive terminal for providing a drive signal and adapted to be coupled to a transistor, and a pulse width modulator. The pulse width modulator is coupled to the feedback input terminal, the control terminal, and the drive terminal, and provides the drive signal having a duty cycle formed in response to the feedback signal. The pulse width modulator includes a line sensing multiplier having a first input for receiving the error signal, a second input for receiving the drive signal, and an output for providing a multiplied signal, and the pulse width modulator further provides the drive signal in response to the multiplied signal.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: June 26, 2018
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Joel Turchi, Christophe Basso
  • Patent number: 9882294
    Abstract: A connector for connecting a motor is provided. The connector for connecting a motor for electrically connecting a three phase coil connecting portion that is drawn out from a motor and a three phase power terminal that is connected with a power cable includes: i) a under terminal block that houses the each power terminal and the each coil connecting portion; ii) an upper terminal block that is coupled to the under terminal block and that presses the each power terminal and the each coil connecting portion; and iii) an engagement portion that engages the under terminal block and the upper terminal block.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: January 30, 2018
    Assignee: Hyundai Motor Company
    Inventors: MyungKyu Jeong, GaEun Lee, Young Jin Seo
  • Patent number: 9819281
    Abstract: A voltage period calculator obtains an oscillation period of a voltage. A power source impedance estimating unit obtains an estimated value of a power source impedance from the oscillation period, an inductance, and a capacitance. A gain setting unit sets a control gain using the estimated value, the inductance, the capacitance, and a desired attenuation coefficient command, and outputs the control gain. A multiplier obtains a product of the control gain and the voltage. A subtractor subtracts the product from a command value to obtain a voltage control ratio command.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: November 14, 2017
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventor: Keisuke Ohta
  • Patent number: 9680080
    Abstract: An electrical generator includes a rotor, a stator core disposed axially around the rotor, a stator sleeve assembly disposed axially around the stator core, and a stator housing disposed axially around the stator sleeve assembly. The stator sleeve assembly includes a cylindrical stator sleeve and thermoelectric elements. The cylindrical stator sleeve has a radially inward facing surface and a radially outward facing surface. The thermoelectric elements are affixed to the radially outward facing surface of the cylindrical stator sleeve. The stator housing includes at least one coolant channel. The coolant channel is in thermal contact with the thermoelectric elements. The thermoelectric elements generate power as a function of the temperature difference between the cylindrical stator sleeve and the coolant channel.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: June 13, 2017
    Assignee: Hamilton Sunstrand Corporation
    Inventor: Debabrata Pal
  • Patent number: 9614450
    Abstract: A feedback signal generating circuit may include a control voltage adjusting circuit outputting a feedback voltage by comparing a control voltage input from an external voltage source with a reference voltage and adjusting a ratio of control voltage drop, and an amplifying circuit generating a feedback signal by differentially amplifying the feedback voltage and a detection voltage associated with a current flowing in a load.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: April 4, 2017
    Assignee: SOLUM CO., LTD.
    Inventors: Ki Hong Kim, Byoung Woo Ryu, Jung Woo Choi
  • Patent number: 9499055
    Abstract: An inverter for an electric vehicle is provided. The inverter for an electric vehicle, which controls an RPM of a motor for the electric vehicle, the inverter including a busbar connected to a power semiconductor module for supplying current, a current sensor measuring the current passing through the busbar, and a control board on which the current sensor is mounted, the control board controlling the motor for the electric vehicle according to a result measured by the current sensor. The busbar is disposed to vertically pass through the current sensor and control board.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: November 22, 2016
    Assignee: LSIS CO., LTD.
    Inventors: Sung Jun Oh, Chang Min Jung, Beum Jun Kim, Ung Hoe Kim, Ki Young Moon
  • Patent number: 9172300
    Abstract: The embodiments of the present invention disclose a charge-pump voltage divider and associated start-up method. The charge-pump voltage divider comprises a start-up circuit that can regulate an inrush current during start up. The start-up circuit comprises a switch, which operates in linear region state during start-up, and operates in switching state after the start-up completes. The charge-pump voltage divider may further comprise a load control switch configured to ensure the start-up is independent of a load current.
    Type: Grant
    Filed: May 9, 2013
    Date of Patent: October 27, 2015
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Taofeng Li, Yike Li
  • Patent number: 9132738
    Abstract: An electric vehicle includes: a vehicle-mounted electric power storage device; an electric power generation mechanism that is configured to generate charging electric power for charging the electric power storage device; an electric power supply device that is configured to supply electric power to external equipment that is not a component of the electric vehicle, by using output electric power from the electric power storage device; and a controller that is configured to control electric power to be supplied by the electric power supply device, according to information indicative of an upper limit of the electric power for charging the electric power storage device.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: September 15, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Takanori Aoki
  • Patent number: 9035350
    Abstract: Methods, systems, circuits, and devices for power-packet-switching power converters using bidirectional bipolar transistors (BTRANs) for switching. Four-terminal three-layer BTRANs provide substantially identical operation in either direction with forward voltages of less than a diode drop. BTRANs are fully symmetric merged double-base bidirectional bipolar opposite-faced devices which operate under conditions of high non-equilibrium carrier concentration, and which can have surprising synergies when used as bidirectional switches for power-packet-switching power converters. BTRANs are driven into a state of high carrier concentration, making the on-state voltage drop very low.
    Type: Grant
    Filed: September 8, 2014
    Date of Patent: May 19, 2015
    Assignee: Ideal Power Inc.
    Inventors: Richard A. Blanchard, William C. Alexander
  • Patent number: 9029909
    Abstract: Methods, systems, circuits, and devices for power-packet-switching power converters using bidirectional bipolar transistors (BTRANs) for switching. Four-terminal three-layer BTRANs provide substantially identical operation in either direction with forward voltages of less than a diode drop. BTRANs are fully symmetric merged double-base bidirectional bipolar opposite-faced devices which operate under conditions of high non-equilibrium carrier concentration, and which can have surprising synergies when used as bidirectional switches for power-packet-switching power converters. BTRANs are driven into a state of high carrier concentration, making the on-state voltage drop very low.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: May 12, 2015
    Assignee: Ideal Power Inc.
    Inventors: Richard A. Blanchard, William C. Alexander
  • Patent number: 9025346
    Abstract: A structure of a fly-back power converting apparatus is disclosed. The structure includes a power transistor, a current detector, a pulse width modulation (PWM) signal generator and a current limiter. The power transistor is coupled to an input voltage and receives a PWM signal. The current detector detects a current output from the power transistor and generates a detecting voltage according to the current. The PWM signal generator generates the PWM signal according to a comparing result by comparing the detecting voltage and a standard voltage. The current limiter generates the standard voltage according to a turn-on time of the power transistor.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: May 5, 2015
    Assignee: Excelliance MOS Corporation
    Inventors: Pao-Chuan Lin, Su-Yuan Lin, Hung-Che Chou
  • Patent number: 9005832
    Abstract: An arrangement for improved operability of a high temperature fuel cell device at higher fuel cell voltage values than nominal voltage values, each fuel cell in the fuel cell device including an anode side, a cathode side, and an electrolyte between the anode side and the cathode side, and the arrangement includes means for determining temperature information of the fuel cells and main power converter for loading fuels cells at least up to their rated power level.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: April 14, 2015
    Assignee: Convion Oy
    Inventors: Kim Åström, Marko Laitinen
  • Patent number: 8995155
    Abstract: A photovoltaic power conditioning system and method is provided. The system includes an isolated DC/DC converter (41), a DC/AC inverter (42), and a sine filter (43). The isolated DC/DC converter (41) receives a DC voltage from a solar cell through a parallel connection structure and converts the DC voltage into another DC voltage and then outputs the converted DC voltage through a series connection structure. The DC/AC inverter (42) converts the DC voltage output from the isolated DC/DC converter into an AC voltage. The sine filter (43) performs sine filtering on the AC voltage output from the DC/AC inverter and outputs the filtered AC voltage. The system employs a topology allowing it to be responsible for part of the output capacity, thereby significantly reducing the required capacity and increasing the system efficiency, so that the system can be applied to small and large-capacity photovoltaic power generation.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: March 31, 2015
    Assignee: Korea Electrotechnology Research Institute
    Inventors: Byung Duk Min, Dong Wook Yoo, Ju Won Bak, Tae Jin Kim, Jong Hyun Kim, Myung Hyo Ryu, Jong Pil Lee
  • Patent number: 8891251
    Abstract: The disclosure describes a processing system with a soft power switch assembly configured to include a zero-power off mode that would allow an off state with no power drain by the device while maintaining all other soft power off mode capabilities, including low power modes, (e.g., sleep, hibernation modes). The processing system can be restored from the zero-power off mode using the same actuation mechanism used when switching from a power on mode to a soft power off mode.
    Type: Grant
    Filed: April 7, 2010
    Date of Patent: November 18, 2014
    Assignee: Apple Inc.
    Inventor: Paul J. Costa
  • Publication number: 20140321166
    Abstract: The invention relates to a process of connecting an AC output of a transformerless inverter of a solar power plant to an internal AC power grid at an input side of a galvanic isolation, while an offset voltage for shifting a potential center point of a photovoltaic generator connected to the inverter is applied. The process includes: (i) synchronizing the inverter with the power grid; (ii) essentially matching a potential center point of the current-carrying lines of the AC output and a potential center point of the power grid, while only one of the potential center points of the current-carrying lines and the power grid is yet shifted by the offset voltage; and (iii) galvanically connecting all current-carrying lines of the AC output with the power grid only after the steps of synchronizing and essentially matching.
    Type: Application
    Filed: July 7, 2014
    Publication date: October 30, 2014
    Inventors: Stephanie Coors, Tobias Mueller, Oliver Prior
  • Publication number: 20140313781
    Abstract: Described herein is a stacked switched capacitor (SSC) energy buffer circuit architecture and related design and control techniques.
    Type: Application
    Filed: January 17, 2013
    Publication date: October 23, 2014
    Inventors: David J. Perreault, Khurram K. Afridi, Minjie Chen
  • Publication number: 20140292085
    Abstract: A photovoltaic power generation system, having a photovoltaic panel, which has a direct current (DC) output and a micro-inverter with input terminals and output terminals. The input terminals are adapted for connection to the DC output. The micro-inverter is configured for converting an input DC power received at the input terminals to an output alternating current (AC) power at the output terminals. A bypass current path between the output terminals may be adapted for passing current produced externally to the micro-inverter. The micro-inverter is configured to output an alternating current voltage significantly less than a grid voltage.
    Type: Application
    Filed: June 12, 2014
    Publication date: October 2, 2014
    Applicant: SOLAREDGE TECHNOLOGIES LTD.
    Inventors: Ilan Yoscovich, Meir Gazit, Tzachi Glovinsky, Yoav Galin
  • Publication number: 20140265579
    Abstract: A method of configuring an installed energy harvesting device to comply with a local grid connection standard is provided. The method identifies a local grid connection standard for an energy harvesting device that has been installed in a physical installation. The method then configures the energy harvesting device to apply the identified grid connection standard. To identify the local gird connection standard, the method determines a physical location for the installation of the energy harvesting device. The method then identifies the local grid connection standard based on the determined physical location.
    Type: Application
    Filed: December 27, 2013
    Publication date: September 18, 2014
    Applicant: Enecsys Limited
    Inventor: Asim Mumtaz
  • Patent number: 8836165
    Abstract: Disclosed is a dual-source converter for a hybrid power supply. The converter includes a first power circuit, a second power circuit, an auxiliary circuit, an output circuit and a closed loop circuit. The first power circuit is electrically connected to the second power circuit in series for receiving two varied voltage sources. The auxiliary circuit is configured to achieve soft switching of all switches. The closed loop circuit is configured to control the duty cycles of the first power circuit, the second power circuit and the auxiliary circuit so as to improve the efficiency of the dual-source converter.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: September 16, 2014
    Assignee: Chung-Shan Institute of Science and Technology, Armaments, Bureau, Ministry of National Defense
    Inventors: Jung-Tzung Wei, Chung-You Lin, Bo-Han Chen, Kuo-Kuang Jen, Yu-Min Liao
  • Publication number: 20140254200
    Abstract: A high resolution rectifier suitable for low voltage signals includes a signal input end connected to a signal source for inputting an original AC current; two amplifiers; one receiving the original AC current from a positive end; and the other receiving the AC current from a negative end; amplification factors of the two amplifiers being reversed to each other; two half wave rectifiers each connected to a respective amplifier selected from the two amplifiers; each half wave rectifier receiving an output from the respective amplifier and removing negative half parts of the input current; and an adder connected to the two half wave rectifiers for adding outputs from the two half wave rectifiers so as to full-wave rectifying of the original AC current.
    Type: Application
    Filed: March 5, 2013
    Publication date: September 11, 2014
    Inventor: Kuei-Wei Kuo
  • Publication number: 20140247623
    Abstract: A reactor 1A of the present invention includes a sleeve-like coil 2, a magnetic core 3 that is disposed inside and outside the coil 2 to form a closed magnetic path, and a case 4A that stores the coil 2 and the magnetic core 3. At least part of the magnetic core 3 (herein an outer core portion 32 provided on the outer circumference side of the coil 2) is formed by a composite material that contains magnetic substance powder and resin. At least part of the outer circumference of the coil 2 is covered by a resin mold portion 21 that is formed by an insulating resin, whereby the shape of the coil 2 is retained. A heat dissipating pedestal portion 5A that forms at least part of the case 4A and that is formed by a non-magnetic metal material is integrally retained with the coil 2 by the resin forming the resin mold portion 21.
    Type: Application
    Filed: September 25, 2012
    Publication date: September 4, 2014
    Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD.
    Inventor: Kazuhiro Inaba
  • Publication number: 20140241011
    Abstract: A reactor of the present invention includes a coil 2, a magnetic core 3 in which the coil 2 is disposed, and a case that stores a combined product 10 made up of the coil 2 and the magnetic core 3. The case includes a bottom plate portion 40 made of a metal material, and a sidewall portion that is attached to the bottom plate portion 40 to surround the combined product 10. A joining layer 42 that fixes the coil 2 is provided at the inner face of the bottom plate portion 40. The region provided with the joining layer 42 has been subjected to surface roughening treatment. When anodic oxidation treatment is carried out as the surface roughening treatment, the bottom plate portion 40 includes an anodic oxide layer 43. The surface roughening treatment increases the contact area between the bottom plate portion 40 and the joining layer 42, whereby the joining strength between the bottom plate portion 40 and the coil 2 can be enhanced.
    Type: Application
    Filed: September 5, 2012
    Publication date: August 28, 2014
    Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD.
    Inventors: Yasushi Nomura, Izumi Memezawa, Hiroshi Teraniti, Atsushi Ito
  • Publication number: 20140233262
    Abstract: A method of performing space vector modulation for PWM control for creating AC waveforms includes generating and sampling a reference signal to generate reference samples and performing a reference vector approximation to synthesize a reference vector associated with at least one of the reference samples. The reference vector approximation employs active vectors, one or more zero vectors, and one or more pseudo zero vectors in the formation thereof. Another method of performing space vector modulation (SVM) includes generating a reference signal and sampling the reference signal at a sampling frequency to generate a plurality of reference samples. The method also includes performing a reference vector approximation to synthesize a reference vector associated with at least one of the reference samples, wherein the reference vector approximation has a first portion that employs two adjacent active vectors and a remaining portion that employs two non-adjacent active vectors in the formation thereof.
    Type: Application
    Filed: August 28, 2013
    Publication date: August 21, 2014
    Applicant: Infineon Technologies AG
    Inventors: Tao Zhao, Arno Rabenstein, Theng Kiong Gan, Choon Keat Kok, Sze Main Wong
  • Publication number: 20140233263
    Abstract: The disclosure relates to a tracking method for a voltage transformer, in particular an inverter, of a photovoltaic system. In the method, an intermediate circuit voltage is repeatedly decreased or increased in one direction to a lower or higher voltage by voltage steps of a specified magnitude. The method is characterized in that an average rate of change of the intermediate circuit voltage in a partial time period between two voltage steps is limited by a maximum average rate of change, the maximum average rate of change being defined according to the magnitude of the intermediate circuit voltage. The disclosure further relates to a tracking device designed to perform the tracking method and to an inverter equipped with the tracking device.
    Type: Application
    Filed: April 24, 2014
    Publication date: August 21, 2014
    Inventors: Martin Bock, Tobias Mueller, Thomas Ortmann, Alexander Unru
  • Publication number: 20140226365
    Abstract: The invention relates to a method for checking a separation point (14) between a photovoltaic inverter (1) and a power supply network (7) having multiple phases (L1, L2, L3) and a neutral conductor (N), wherein multiple switching contacts of the separation point (14) are controlled by the photovoltaic inverter (1), and to a photovoltaic inverter (1). To allow a simple and quick check of the functionality of the separation point (14), the switching contacts of the separation point (14) are each formed by single-pole relays (15-22) and switched in steps according to a switching pattern. For checking switching contacts, a voltage (26, 27, 28) is measured at at least one phase (L1, L2, L3) with respect to the neutral conductor (N), upstream of the separation point (14), and compared to voltage values assigned in accordance with the switching pattern, thereby to deduce the functionality of the switching contacts.
    Type: Application
    Filed: February 12, 2014
    Publication date: August 14, 2014
    Applicant: Fronius International GmbH
    Inventors: Friedrich OBERZAUCHER, Joachim DANMAYR
  • Publication number: 20140218980
    Abstract: An inverter circuit comprises an inverter which can be configurable for controlling the supply of mains current from a grid to an electric machine in a start-up mode whereby the machine drives the prime mover for initialisation. Thereafter the same inverter is reconfigurable as part of the circuit to supply reactive power to the grid when the machine is running as a generator powered by the prime mover.
    Type: Application
    Filed: February 5, 2014
    Publication date: August 7, 2014
    Applicant: Control Techniques Limited
    Inventor: Peter Eigenbrodt
  • Publication number: 20140204613
    Abstract: For controlling a photovoltaic system connected to an AC power grid and including a photovoltaic generator and an inverter, electric power which includes positive and negative dynamic control power is transferred by means of the inverter between the photovoltaic generator and the AC power grid as a function of a received power control signal.
    Type: Application
    Filed: March 20, 2014
    Publication date: July 24, 2014
    Inventors: Jonathan Blanz, Volker Wachenfeld, Stijn Stevens, Jens Friebe
  • Publication number: 20140197764
    Abstract: Device for operative connection between a subsea step out cabie far end and subsea toads such as pumps, compressors and control systems, distinctive in that the device is a subsea DC provider (SDCP), and it comprises: a SDCP unit for altering alternating current power received from the step out cable to direct current power for delivery to said loads, a gas and/or liquid filled vessel into which said unit is arranged, and the device is a SDCP for subsea location at a far end of a subsea step out cable connected to at least one AC power source at the step out cable near end, and the step out length is long, which means long enough to cause, stability problems at frequency and power levels feasible for subsea pump and compressor motors, and where the device via the step out cable receives input electrical power at a low enough frequency to have stable transmission and the device, operativeSy connected to the subsea motors, delivers a DC output electrical amperage and voltage feasible for operation of connected
    Type: Application
    Filed: September 11, 2012
    Publication date: July 17, 2014
    Applicant: Aker Subsea AS
    Inventor: Kjell Olav Stinessen
  • Publication number: 20140183960
    Abstract: A photovoltaic (PV) power generation system comprising an array of PV cell modules arranged in strings connected via secondary stage power efficiency optimizers to a central inverter is provided. In at least one of the strings, sunlight receiver assemblies (including the PV cells) of the PV cell modules are provided each with a corresponding primary stage or integrated power efficiency optimizer to adjust the output voltage and current of the PV cell. The PV cell modules can, but need not include optical concentrators.
    Type: Application
    Filed: June 22, 2012
    Publication date: July 3, 2014
    Applicant: Morgan Solar Inc.
    Inventors: Dhanushan Balachandreswaran, John Paul Morgan
  • Publication number: 20140176026
    Abstract: Controlling a photovoltaic system includes providing a photovoltaic device having a variable DC voltage output and a variable DC current output. The photovoltaic device has a combination of a voltage output level and a current output level corresponding to a predetermined, desired power point. A DC power supply is connected in a parallel and/or series combination with the photovoltaic device. A DC load is connected in series to the combination of the DC power supply and the photovoltaic device such that the load is powered by the combination. A characteristic of the DC power supply is adjusted such that the voltage output and the current output of the photovoltaic device substantially match the voltage output level and the current output level corresponding to the desired power point.
    Type: Application
    Filed: February 25, 2014
    Publication date: June 26, 2014
    Inventor: John Saussele
  • Publication number: 20140146586
    Abstract: A multilevel converter for converting between an AC voltage and a DC voltage and a method of starting up such multilevel converter are provided. The multilevel converter has an AC terminal and a DC terminal for connecting the multilevel converter to either an AC power source or a DC power source, respectively, which supplies the voltage to be converted. The multilevel converter further comprises at least one converter leg, the DC terminal comprising a first and a second DC terminal, the converter leg comprising plural converter cells connected in series between the first and second DC terminals. The AC terminal of the multilevel converter is electrically coupled to an electrical link between two of said converter cells of said converter leg.
    Type: Application
    Filed: April 10, 2012
    Publication date: May 29, 2014
    Inventors: Anandarup Das, Hamed Nademi, Lars Norum
  • Publication number: 20140140485
    Abstract: A transformer network circuit utilizing multiple smaller transformer cores, instead of a single, relatively larger core, for transferring electrical power while maintaining a smaller overall core mass.
    Type: Application
    Filed: April 15, 2013
    Publication date: May 22, 2014
    Applicant: Moxtek, Inc.
    Inventor: Moxtek, Inc.
  • Publication number: 20140132295
    Abstract: The present techniques include methods and systems for detecting a failure in a capacitor bank of an electrical drive system. Embodiments include using discharge resistors to discharge capacitors in the capacitor bank, forming a neutral node of the capacitor bank. In different capacitor configurations, the neutral node is measured, and the voltage is analyzed to determine whether a capacitor bank unbalance has occurred. In some embodiments, the node is a neutral-to-neutral node between the discharged side of the discharge resistors and a neutral side of the capacitor bank, or between the discharged side of the discharge resistors and a discharged side of a second set of discharge resistors. In some embodiments, the node is a neutral-to-ground node between the discharged side of the discharge resistors and a ground potential.
    Type: Application
    Filed: January 20, 2014
    Publication date: May 15, 2014
    Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.
    Inventors: Yuan Xiao, Lixiang Wei, Doyle F. Busse
  • Publication number: 20140112022
    Abstract: An electrical switching apparatus includes a transductor circuit that senses a direct current between at least one input terminal and at least one output terminal and outputs an alternating current proportional to the direct current between the input terminal and the output terminal. The electrical switching apparatus also includes an alternating current electronic trip circuit configured to control pairs of separable contacts to separate based on the alternating current output from the transductor circuit.
    Type: Application
    Filed: October 22, 2012
    Publication date: April 24, 2014
    Applicant: EATON CORPORATION
    Inventors: XIN ZHOU, JAMES LEO LAGREE, WILLIAM E. BEATTY
  • Patent number: 8688318
    Abstract: Methods, program products, hybrid, and non-hybrid vehicles are provided for providing diagnostics for a direct current (DC) converter of the hybrid, and non-hybrid vehicle. The vehicle includes an engine, a rechargeable energy storage system (RESS), the direct current (DC) converter, and a controller. The engine is automatically turned on and off based on driver inputs in accordance with an auto-stop feature. The RESS at least facilitates turning on the engine. The DC converter is coupled to the RESS. The controller is coupled to the DC converter, and is configured to determine a status of the engine, receive a DC converter voltage value from the DC converter, and provide diagnostics for the DC converter based on the engine status, RESS voltage, and the DC converter voltage.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: April 1, 2014
    Assignee: GM Global Technologies Operations LLC
    Inventors: Jeffrey S. Richards, Daniel P. Grenn, Voytek A. Novak
  • Publication number: 20140085935
    Abstract: A power conversion device that includes first and second power conversion units; and a DC link unit positioned between the first and second power conversion units. In the power conversion device, the DC link unit includes a main capacitor and a dummy capacitor, which are selectively used. Accordingly, it is possible to prevent damage of a capacitor used in the DC link unit and to extend the lifespan of the capacitor.
    Type: Application
    Filed: March 15, 2013
    Publication date: March 27, 2014
    Applicant: SAMSUNG SDI CO., LTD.,
    Inventor: Seung-Yong LEE
  • Publication number: 20140078780
    Abstract: Provided are methods and circuits for a controller for a control system, comprising first and second control loops that operate substantially independently, wherein the first control loop is an amplitude control loop and the second loop is a phase or frequency control loop. In some embodiments the amplitude control loop operates at an amplitude that is proportional to an amplitude of an input signal at a fundamental system frequency and at a selected harmonic of a fundamental system frequency; and the frequency control loop operates at a fundamental system frequency and at a selected harmonic of the fundamental system frequency. The frequency control loop may adaptable to a fundamental control system frequency or to a selected harmonic of the fundamental control system frequency. The controller may be implemented as a resonant controller and used in various ac systems, and offers high structural robustness in digital implementations.
    Type: Application
    Filed: September 13, 2013
    Publication date: March 20, 2014
    Applicant: Sparq Systems Inc.
    Inventors: Sayed Ali KHAJEHODDIN, Masoud KARIMI GHARTEMANI, Praveen K. JAIN, Alireza BAKHSHAI
  • Publication number: 20140029308
    Abstract: An inverter having extended lifetime DC-link capacitors for use with a DC power source such as a photovoltaic panel is described. The inverter uses a plurality of switchable capacitors to control the voltage across the capacitors. The expected lifetime of the capacitors can be extended by disconnecting unnecessary capacitors from a voltage. The capacitors may be periodically connected to a voltage in order to maintain an oxide dielectric layer of the capacitor.
    Type: Application
    Filed: March 8, 2012
    Publication date: January 30, 2014
    Applicant: SOLANTRO SEMICONDUCTOR CORP.
    Inventors: Christian Cojocaru, Raymond Kenneth Orr
  • Publication number: 20140028029
    Abstract: A power converter for an engine generator includes an insulative support that receives and supports circuit components for converting incoming AC power to desired power, such as power suitable for a welding application. One or more rectifier modules are provided that are received and supported by the support. Three such modules may be provided for receiving three phase power from a generator. DC power from the rectifier module is applied to DC bus plates. The plates may be coupled to capacitors. A power conversion circuit, such as a buck converter, is coupled to the DC bus plates to convert the DC power to output power.
    Type: Application
    Filed: June 4, 2013
    Publication date: January 30, 2014
    Inventor: Nathan J. Jochman
  • Publication number: 20140016357
    Abstract: A power system comprises a switching circuit for driving an inductive load and a magnetic core coupling with the switching circuit to form a magnetic amplifier.
    Type: Application
    Filed: July 12, 2012
    Publication date: January 16, 2014
    Inventors: Yen-Wei Hsu, Whei-Chyou Wu
  • Publication number: 20140003093
    Abstract: There are provided a multi-level converter capable of outputting power having various voltage levels with respect to a single input power supply by using a simple circuit, an inverter having the same, and a solar power supply apparatus having the same. The multi-level converter includes a first buck-boost unit having a first power switch switching an input power supply and outputting a first power having a voltage level varied according to switching of the first power switch; a bypass unit outputting a second power having a voltage level of the input power supply; and a second buck-boost unit having a second power switch switching the input power supply and outputting a third power having a voltage level varied according to switching of the second power switch.
    Type: Application
    Filed: September 14, 2012
    Publication date: January 2, 2014
    Inventors: Doo Young SONG, Sung Jun PARK, Min Ho HEO, Tae Hoon KIM, Tae Won LEE
  • Publication number: 20130336010
    Abstract: Alternating current to direct current (AC/DC) converter control systems and methods are operable to source high values of DC loads or source low values of DC loads while maintaining harmonic distortion limits. An exemplary embodiment receives direct current (DC) load information corresponding to a DC load drawn from an alternating current (AC) network by an AC/DC converter, wherein the AC network also sources a plurality of AC loads, and wherein harmonics output from the AC/DC converter is limited to at least a specified harmonic distortion limit; compares the DC load information with a load threshold; in response to the DC load information being at least equal to the load threshold, operates the AC/DC converter under continuous conduction mode (CCM) control; and in response to the DC load information being less than the load threshold, operates the AC/DC converter under critical conduction mode (CRM) control.
    Type: Application
    Filed: June 18, 2012
    Publication date: December 19, 2013
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Sunit Kumar Saxena, Deepak Bhimrao Mahajan
  • Publication number: 20130329461
    Abstract: A power supply device using electric power network connects to an external power source and an electronic device, and supplies an alternating current power from the external power source to the electronic device to be a direct current power for the electronic device. In this case, the power supply device using electric power network comprises an electric power connection unit connected with the external power source, a conversion unit connected with the electric power connection unit, and an output unit connected with the conversion unit and the electronic device. The electric power connection unit is used for acquiring the alternating current power from the external power source, and the alternating current power is converted into a direct current power by the conversion unit. Thereby, the direct current power required for the electronic device during the process of charging and supplying power is supplied.
    Type: Application
    Filed: August 14, 2012
    Publication date: December 12, 2013
    Inventors: SHIH-PO LO, TAN-LUNG CHEN
  • Publication number: 20130322123
    Abstract: A control device and a control method during bypassing of power units are provided. The method includes: detecting a first three-phase output electrical signal; calculating a first positive sequence component and a first negative sequence component of the first three-phase output electrical signal; providing a given positive sequence component and a given negative sequence component so as to respectively perform the closed-loop compensation on the first positive sequence component and the first negative sequence component, thereby outputting a second positive sequence component and a second negative sequence component; superimposing the second positive sequence component and the second negative sequence component; and outputting a second three-phase output electrical signal in a preset way.
    Type: Application
    Filed: September 14, 2012
    Publication date: December 5, 2013
    Applicant: DELTA ELECTRONICS, INC.
    Inventors: Jia LIU, Yong-Qiang LANG, Yu-Yang MAO
  • Publication number: 20130322122
    Abstract: A control circuit for controlling one or more power switches of a power converter includes a voltage control loop and a current control loop. The control circuit is configured to generate a current reference for the current control loop using the voltage control loop and an AC reference signal. The control circuit is configured to operate in at least a first mode in which a parameter of the voltage control loop is sampled only at every other zero crossing of the AC reference signal and the sampled parameter is used to generate the current reference for the current control loop. The power converter may be an AC-DC converter or a DC-AC converter (i.e., inverter). Alternatively, the voltage control loop may be sampled at every zero crossing of the AC reference signal, and/or more frequently during transient load conditions.
    Type: Application
    Filed: May 30, 2012
    Publication date: December 5, 2013
    Inventors: James Sigamani, Yancy Fontanilla Boncato
  • Publication number: 20130223102
    Abstract: A device for powering battery dependent equipment with AC power includes faux batteries that correspond with standard and non-standard battery sizes and configurations; cables; and a means for connecting the faux batteries to an outlet. Instead of inserting batteries into the battery compartment of equipment, a user inserts the faux batteries, plugs the inventive device into a wall socket, and uses the device as usual. A variety of different configurations and components ensure safety and deliver the desired output.
    Type: Application
    Filed: February 8, 2013
    Publication date: August 29, 2013
    Inventor: Scott G. Williams
  • Patent number: 8513911
    Abstract: A power converter that interfaces a motor requiring variable voltage/frequency to a supply network providing a nominally fixed voltage/frequency includes a first rectifier/inverter connected to a stator and a second rectifier/inverter. Both rectifier/inverters are interconnected by a dc link and include switching devices. A filter is connected between the second rectifier/inverter and the network. A first controller for the first rectifier/inverter uses a dc link voltage demand signal indicative of a desired dc link voltage to control the switching devices of the first rectifier/inverter. A second controller for the second rectifier/inverter uses a power demand signal indicative of the level of power to be transferred to the dc link from the network through the second rectifier/inverter, and a voltage demand signal indicative of the voltage to be achieved at network terminals of the filter to control the switching devices of the second rectifier/inverter.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: August 20, 2013
    Assignee: Converteam Technology Ltd.
    Inventors: Rodney Jones, Christopher Newton
  • Publication number: 20130188396
    Abstract: A method of controlling a photovoltaic system includes providing a photovoltaic device having a variable DC voltage output and a variable DC current output. The photovoltaic device has a combination of a voltage output level and a current output level corresponding to a maximum power point. A DC power supply is connected in a parallel and/or series combination with the photovoltaic device. A DC load is connected in series to the combination of the DC power supply and the photovoltaic device such that the load is powered by the combination. A characteristic of the DC power supply is adjusted such that the voltage output and the current output of the photovoltaic device substantially match the voltage output level and the current output level corresponding to the maximum power point or other desired power point.
    Type: Application
    Filed: January 24, 2013
    Publication date: July 25, 2013
    Applicants: Bosch Solar Energy Corp.
    Inventors: Bosch Solar Energy Corp., Robert Bosch GmbH