Electric power conversion systems patents - Monitor Patents
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Electric power conversion systems

Below are recently published patent applications awaiting approval from the USPTO. Recent week's RSS XML file available below.
Listing for abstract view: USPTO application #, Title, Abstract excerpt,Patent Agent. Listing format for list view: USPTO National Class full category number, title of the patent application.
  
11/13/2014 > 31 patent applications in 21 patent subcategories.

20140334185 - Switching power supply apparatus: A switching power supply apparatus includes an isolated converter that has efficiency characteristics in which power conversion efficiency at a rated load is higher than power conversion efficiency at a light load and that converts power-supply voltage into direct-current voltage to output the direct-current voltage; an FET that switches supply... Agent:

20140334187 - Current source inverter and operation method thereof: A current source inverter includes a controller, an input unit, a buffer unit, a modulating unit, and a commutator. The controller generates a switch control signal, an inverse switch control signal, a first pulse width modulation control signal, and a second pulse width modulation control signal. The input unit stores... Agent: Darfon Electronics Corp.

20140334186 - Energy-saving power converter: An energy-saving power converter includes a first switch unit, a transformer primary side, a transformer secondary side, a diode subunit, a switch subunit, a comparison unit, a current sensor, and a resistor. The transformer primary side starts storing energy when the first switch unit is turned on. The transformer secondary... Agent: Chicony Power Technology Co., Ltd.

20140334188 - Soft switching converter by steering the magnetizing current: A method is shown to create soft transition in selected topologies by controlling and designing the magnetizing current in the main transformer to exceed the output current at a certain point in the switching cycle.... Agent:

20140334189 - Bi-directional dc-dc converter: The present disclosure discloses a bi-directional DC-DC converter, comprising a primary-side inverting/rectifying module, an isolated transformer, and a secondary-side rectifying/inverting module, wherein the primary-side inverting/rectifying module comprises a first bridge arm composed of a first switching component and a second switching component connected in series and a clamping circuit comprising... Agent: Delta Electronics, Inc.

20140334191 - Dc-dc conversion device: A circuit of a full-bridge configuration using four semiconductor switch elements is used as a circuit on the primary side of a transformer in a DC-DC conversion device. With this configuration, it is possible to increase the turn ratio of a primary winding and a secondary winding of the transformer... Agent:

20140334190 - Variable frequency iteration mppt for resonant power converters: A method of maximum power point tracking (MPPT) uses an MPPT algorithm to determine a switching frequency for a resonant power converter, including initializing by setting an initial boundary frequency range that is divided into initial frequency sub-ranges bounded by initial frequencies including an initial center frequency and first and... Agent: University Of Central Florida Research Foundation, Inc.

20140334192 - Piezoelectric power converter with bi-directional power transfer: The present invention relates to a bi-directional piezoelectric power converter comprising a piezoelectric transformer. The piezoelectric transformer comprises an input electrode electrically coupled to a primary section of the piezoelectric transformer and an output electrode electrically coupled to an output section of the piezoelectric transformer to provide a transformer output... Agent: Noliac A/s

20140334193 - Self-oscillating loop based piezoelectric power converter: The present invention relates to a piezoelectric power converter comprising an input driver electrically coupled directly to an input or primary electrode of the piezoelectric transformer without any intervening series or parallel inductor. A feedback loop is operatively coupled between an output voltage of the piezoelectric transformer and the input... Agent:

20140334194 - Resonant transition controlled flyback: A new and useful method and inductive circuit is provided that provides a resonant transition control that involves shorting the winding of an inductor or transformer to delay the natural ringing transition. The present invention provides for controlling the natural ring of an inductive circuit has a choke that stores... Agent:

20140334196 - Control device for multiphase interleaved dc-dc converter and control method thereof: This instant disclosure provides a control method for interleaved multiphase Boost PFC converter. The interleaved multiphase Boost PFC converter has a master phase and a plurality of slave phases, the master phase operates in the critical conduction mode, the master of each slave phase has an inductor and a power... Agent: National Taiwan University

20140334195 - Managing leakage inductance in a power supply: An apparatus includes: a power supply circuit including at least a first stage having a push-pull circuit topology, the first stage including at least one transformer that isolates a primary side of the first stage from a secondary side of the first stage; a clamp circuit coupled to a center... Agent:

20140334197 - Power supply: The present disclosure describes a power supply with multiple operating modes, to detect a load condition of an electronic device, and to automatically change between the multiple operating modes to supply an output direct current (DC) signal to the electronic device based on the load condition detected by the load... Agent: Hewlett-packard Development Company, Lp.

20140334198 - Transformer shielding for common mode noise reduction in isolated converters: At least one shield member interposed between primary and secondary windings of a transformer and connected to the primary and/or secondary windings forms a distributed parasitic capacitance between the shield member and either the winding to which it is not connected or another shield member connected to that winding. Connections... Agent:

20140334199 - Five-level power converter, and control method and control apparatus for the same: A five-level power converter and a control method for the same are provided. The five-level power converter includes an inverter and at least a rectifier, where the rectifier includes at least one rectifier control circuit and four capacitors which are divided into two groups, each with two capacitors connected in... Agent:

20140334200 - Start-up circuit: Aspects of the disclosure provide a circuit. The circuit includes a depletion mode transistor coupled to a power supply and a current path coupled with the depletion mode transistor in series to provide a current to charge a capacitor. The current path has a first resistance during a first stage,... Agent: Marvell World Trade Ltd.

20140334201 - Snubber circuit to increase efficiency of power converters: A system including a converter and a snubber circuit. The converter converts an alternating current voltage into a direct current voltage and outputs the direct current voltage across an inductance and a switch connected in series. The inductance has a center tap connected to a node, which is connected to... Agent: Marvell World Trade Ltd.

20140334202 - Circuit for transferring power between a direct current line and an alternating-current line: A system, method, and apparatus is disclosed for interfacing and transferring power unidirectionally or bidirectionally between a direct current (DC) line and a single or multiphase alternating-current (AC) line for only half of any given phase and only a single phase at a time when polarity is matched between the... Agent:

20140334203 - Power converter and method for manufacturing power converter: A power converter includes a switch element, a snubber capacitor, and a connection conductor configured to connect the switch element and the snubber capacitor to each other, and at least a part of the connection conductor is arranged to be held between the snubber capacitor and an electrode of the... Agent: Kabushiki Kaisha Yaskawa Denki

20140334204 - Apparatus for parallel operation of pulse-width modulation power converters: There is provided a feedback value calculating section to calculate an average of voltage commands V1_cmd, V2_cmd after output limitation, as a feedback value. As a deviation used for an integral calculation of a current control section 6a, 6b, a sum obtained by adding a product to a deviation between... Agent: Meidensha Corporation

20140334205 - Synchronous rectification controlling circuit and synchronous rectification controlling method: In one embodiment, a synchronous rectification circuit can include: (i) a sampling circuit configured to sample a voltage across first and second power terminals of a synchronous rectifier, and to generate a first sampling voltage; (ii) an enable controlling circuit configured to delay the first sampling voltage, and to generate... Agent: Silergy Semiconductor Technology (hangzhou) Ltd.

20140334206 - Method for balancing capacitors in an inverter: The PWM modulating method comprises the following steps: detecting actual voltage values (Vc1, Vc1, Vc2, Vc3 . . . ) across bulk capacitors (C1, C2, C3) provided across input terminals of said inverter; calculating a duty cycle vector (D) based on electric parameters defining a rotating vector (V0) representing an... Agent: Power-one Italy S.p.a.

20140334207 - Controlling an electrical converter: A method, a computer-readable medium for controlling an electrical converter, and a controller are disclosed. The method for controlling an electrical converter can include receiving an actual switching state uk-1 of the electrical converter; determining a scenario tree for future switching states of the electrical converter based on the actual... Agent: Abb Research Ltd

20140334209 - Radio frequency power source having precise power detector: A radio frequency (RF) power source having a precise power detector includes a RF signal generator, a RF power amplifying circuit, a power supply circuit, and a precise power detector. The precise power detector includes a voltage mutual inductor, a current mutual inductor, a precise detecting module, and a microcontroller... Agent:

20140334208 - Synchronous rectification in the three-level inverter-converter topologies: A power module for a three-level power inverter/converter that employs synchronous rectification for use in a uni-directional active rectifier mode to reduce static losses and enhance efficiency across the circuit. Each synchronous rectifier can be a silicon carbide (SiC) power MOSFET connected in parallel with a SiC power diode, for... Agent: Hamilton Sundstrand Corporation

20140334210 - Current source rectifier modulation in discontinuous modes of operation: Systems and methods disclosed herein include a controller for a current source rectifier that is configured to facilitate operation in both continuous and discontinuous conduction modes. The controller comprises a discontinuous mode detection unit configured to determine when input current of the current source rectifier becomes discontinuous and a duty... Agent:

20140334211 - Power inverter implementing phase skipping control: A power inverter includes a DC/AC inverter having first, second and third phase circuitry coupled to receive power from a power source. A controller is coupled to a driver for each of the first, second and third phase circuitry (control input drivers). The controller includes an associated memory storing a... Agent: University Of Central Florida Research Foundation, Inc.

20140334212 - Semiconductor device and power converter: A semiconductor device of this invention (an IGBT with a built-in diode) includes: an n−-type drift layer 1; a p-type channel region 2 that is arranged in contact with the surface side of this n−-type drift layer 1; a gate electrode 5 that is provided in a trench T provided... Agent: Hitachi, Ltd.

20140334214 - Inverter device: In a switching circuit in which a power semiconductor switching element and a unipolar type diode are connected in parallel, the noise due to ringing is reduced. When the main circuit current flowing is equal to or less than a predetermined value, an Si-IGBT is switched and driven by a... Agent:

20140334215 - Resonant bi-directional dc-ac converter: A new and useful circuitry for DC to AC single stage conversion are presented, with the advantages of bi-directionality, resonant power transfer, high efficiency and simplicity. The output voltage dual polarity is achieved by means of control, synchronizing the output switch with one or the other of the primary switches.... Agent:

20140334213 - Switching arrangement for inverter, and inverter: Exemplary embodiments are directed to a method and switching arrangement for an inverter. The inverter including a positive direct current pole, a negative direct current pole, and a neutral direct current pole. The arrangement having a first controllable switch connected between the neutral direct current pole of the inverter and... Agent: Abb Oy

  
11/06/2014 > 17 patent applications in 14 patent subcategories.

20140328086 - Activation apparatus and method for activating a direct voltage converter: The invention relates to an activation apparatus (20) for a galvanically decoupled direct voltage converter having a synchronous rectifier, comprising a signal generating device (22), which is designed to generate control signals (22c, 22d) for switch devices of the synchronous rectifier and a reference current signal (22b), a first comparator... Agent: Robert Bosch Gmbh

20140328087 - Apparatus and method for implementing a multiple function pin in a bcm power supply: An apparatus and a method for implementing a multiple function pin in a boundary conduction mode power supply, uses a same pin to switch a power switch and to achieve zero current detection to reduce pin count and save cost of a control integrated circuit. A first voltage is applied... Agent: Richtek Technology Corporation

20140328088 - Power supply circuit: A power supply circuit includes a plurality of output terminals that output voltages (voltages may have the same or different voltage values among the output terminals), and a transformer that has a plurality of output windings. First and second output windings of the plurality of output windings are coupled to... Agent: Tdk Corporation

20140328089 - On time sampling prevention: An example controller circuit includes a feedback sampling circuit, an oscillator, a drive logic, and a false sampling prevention circuit. The feedback sampling circuit generates a sample signal in response to a sampling of a feedback signal. The oscillator generates an on-time signal that transitions from a first logic state... Agent:

20140328090 - Switching power supply apparatus and semiconductor device: A switching power supply apparatus includes a PFM control circuit that outputs a clock signal Set such that a switching frequency of a switching element varies in accordance with a load state. The clock signal Set determines a turn-on timing of the switching element. A reference value of a current... Agent: Panasonic Corporation

20140328091 - Power converter: A power converter includes a rectifier section, an inverter section, a capacitance element connected between inverter section input ends, an inductance element forming part of an LC filter with the capacitance element, a voltage detector detecting an inductance element voltage, and a controller controlling the inverter section based on the... Agent:

20140328092 - Inverter device and inverter generator: An inverter device includes a voltage command value output unit that outputs a voltage command value, voltage sensors that detect output voltage from a switching circuit, a Fourier transform unit that performs frequency analysis on the output voltage detected by the respective voltage sensors, and a voltage correction value calculation... Agent: Toshiba Kikai Kabushiki Kaisha

20140328093 - Power converter: A Voltage Sourced Converter, VSC, for a High Voitage Direct Current, HVDC, power converter, the VSC comprises a bridge circuit for each of one or more phases of an AG network. The bridge circuit has two arms, each arm connecting the supply to a pole of a DC terminal, wherein... Agent:

20140328094 - Apparatus, system, and method for providing power redundancy to a device designed to draw power from a single external power adapter: An apparatus may include a plurality of power inputs configured to receive direct current from a plurality of external power adapters that convert alternating current to direct current. The plurality of external power adapters may include a primary external power adapter and at least one backup external power adapter. The... Agent:

20140328095 - Switched capacitor voltage converting device and switched capacitor voltage converting method: A voltage converting device includes first to third voltage converters, each including a capacitor, a pair of charge switches for charging the capacitor, a pair of first output switches for outputting a first output voltage through the capacitor, and a pair of second output switches for outputting a second output... Agent: Ili Technology Corporation

20140328096 - Active power factor correction circuit for a constant current power converter: The present disclosure provides techniques for power factor correction on a constant current system. In an example embodiment, the present disclosure provides a power factor correction circuit which receives a constant current power input. The power factor correction circuit provides an input voltage tuned to match the phase of the... Agent:

20140328097 - Bridgeless boost power factor correction circuit for constant current input: The present disclosure provides techniques for power factor correction on a constant current system without the use of a diode rectifier bridge. In an example embodiment, the present disclosure provides a power factor correction circuit which includes two switching MOSFETs biased in opposite directions which operate during opposite half cycles... Agent:

20140328098 - Switching power supply apparatus: A switching power supply apparatus includes an isolated converter with efficiency characteristics in which power conversion efficiency of a rated load is higher than power conversion efficiency of a light load and that converts power-supply voltage into direct-current voltage to output the direct-current voltage, a secondary battery that stores the... Agent:

20140328099 - Control circuit for power converter and method thereof: A control circuit for a power converter includes a pulse width modulation signal generating circuit, a power estimation circuit, and a current limiting signal generating circuit. The pulse width modulation signal generating circuit generates pulse width modulation signals according to a current sense signal and a current limiting signal for... Agent: Richtek Technology Corporation

20140328100 - Active rectification control: A method of active rectification control of an active rectifier includes detecting a phase angle and a frequency of a voltage input of the active rectifier; regulating a DC output voltage of the active rectifier with d-q components of a pole voltage; and aligning a reference current input of the... Agent:

20140328101 - Voltage conversion circuit and electronic apparatus: A voltage conversion circuit has a plurality of primary capacitors charged by a power supply, a secondary capacitor connected in parallel to the respective plurality of primary capacitors that is charged at a voltage supplied to a load circuit, a plurality of switching circuits provided in association with the respective... Agent: Omron Corporation

20140328102 - Power source inverter for use with a photovoltaic solar panel: An improved topology is presented for a single phase power source inverter that is designed to minimize double frequency ripple. The inverter circuit includes: a capacitor coupled in parallel across a direct current (DC) voltage source; a bridge circuit having three legs electrically connected in parallel with the voltage source... Agent: Board Of Trustees Of Michigan State University

  
10/30/2014 > 20 patent applications in 16 patent subcategories.

20140321165 - Optimized voltage-frequency control: A method for controlling an electronic circuit, characterised in that it comprises a step of feedback control of a current voltage-frequency operating point relative to a reference curve of a voltage-frequency domain of operation associated with the circuit, to bring the circuit from a first operating point to a second... Agent:

20140321166 - Connecting an inverter in a solar power plant with shifted potential center point: 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... Agent:

20140321167 - Power supply with voltage output responsive to load demand: A method for a power adapter to selectively provide a first and a second output voltage may comprise coupling a rectified and filtered transformer input signal to a primary winding of a transformer. The secondary winding thereof may comprise a first tap associated with the first output voltage and a... Agent:

20140321169 - Circuit configuration having a resonant converter, and method for operating a resonant converter: A circuit configuration contains a resonant converter feeding energy into a primary winding of a transformer, a control circuit for controlling the resonant converter and a plurality of modules. The modules include a frequency generator controllable with variable frequency, a short circuit monitoring unit configured to protect components of the... Agent: Siemens Aktiengesellschaft

20140321168 - Resonance-type power supply apparatus: There is provided a resonance-type power supply apparatus capable of controlling primary side switching by estimating output power based on resonance current of the primary side. The resonance-type power supply apparatus includes a switching unit switching input power, a transformer including a primary winding receiving the power switched by the... Agent: Samsung Electro-mechanics Co., Ltd.

20140321170 - Integrated primary startup bias and mosfet driver: Some implementations are directed to a A DC-to-DC converter that includes a power transformer having a primary side and a secondary side and a plurality of power transistors coupled to the primary side of the transformer. The converter also includes a secondary bias supply coupled to the secondary side of... Agent: Texas Instruments Incorporated

20140321171 - Power conversion device: A power conversion device including a power conversion portion that switches direct current voltage supplied by a positive line and negative line of a direct current power supply with a semiconductor switching element, and outputs converted voltage, is such that a plurality of interline capacitors are connected in parallel between... Agent:

20140321172 - Systems and methods for a dc phaseback choke: Phaseback DC choke includes a common core, a first coil formed about the common core, and a second coil formed about the common core in parallel opposing configuration relative the first coil. A DC circuit including a Phaseback DC choke is also provided.... Agent:

20140321173 - Systems and methods for increasing output current quality, output power, and reliability of grid-interactive inverters: Various enhancements to grid-interactive inverters in accordance with embodiments of the invention are disclosed. One embodiment includes input terminals configured to receive a direct current, output terminals configured to provide an alternating output current to the utility grid, a controller, an output current sensor, and a DC-AC inverter stage comprising... Agent: Chilicon Power, LLC

20140321174 - Power supply device and semiconductor device: Switching loss is reduced by decreasing the switching frequency of a PFC power supply in light load condition, whereas the switching frequency is maintained high in heavy load operation. Efficiency in light load operation is thus improved without enlarging a boosting inductor and an output smoothing capacitor. A capacitor is... Agent:

20140321175 - System and method for protection during inverter shutdown in distributed power installations: A protection method in a distributed power system including of DC power sources and multiple power modules which include inputs coupled to the DC power sources. The power modules include outputs coupled in series with one or more other power modules to form a serial string. An inverter is coupled... Agent:

20140321176 - Systems and methods for electronic tru input protection: A system comprising a transformer rectifier unit (TRU) and a protection module operatively connected to an alternating current (AC) bus and configured to receive an AC power signal from the AC bus. The protection module is configured to monitor one or more parameters of the AC power signal and is... Agent: Hamilton Sundstrand Corporation

20140321177 - Double-rectifier for a multi-phase contactless energy transmission system: A secondary-side rectifier of an inductive n-phase energy transmission system with N greater than or equal to 3, the energy transmission system including in each phase a resonant oscillating circuit, each resonant oscillating circuit including at least one inductor and at least one capacitor wherein secondary-side resonant oscillating circuits are... Agent: Bombardier Transportation Gmbh

20140321178 - Turn-off overvoltage limiting for igbt: A turn-off overvoltage limiting for IGBT is described herein. The injection of a sample of the overvoltage across the IGBT in the gate drive to slow down the slope of the gate voltage decrease only during the overvoltage above a predetermined value is described herein. Techniques to increase the parasitic... Agent: Tm4 Inc.

20140321182 - Control apparatus and control method for voltage conversion apparatus: A control apparatus for a voltage conversion apparatus includes: duty command signal generation means for generating a duty command signal corresponding to a duty ratio of switching elements carrier signal generation means for generating carrier signals corresponding to respective switching frequencies of the switching elements; switching control signal generation means... Agent: Toyota Jidosha Kabushiki Kaisha

20140321179 - Electrical circuit synchronisation: A method, apparatus, computer readable medium, and system for synchronising a power source with a three-phase electricity grid for the power source to supply electricity to the electricity grid is disclosed. The method comprises operating a first switching unit to disconnect a power source from an interfacing circuit. The interfacing... Agent: Control Techniques Limited

20140321180 - Inverter circuit, power converter circuit, and electric vehicle: An object is to reduce, with the control circuit of the full-bridge inverter circuit, distortions in an output signal of the inverter circuit resulting from an error in control of the switching of the high-side transistors and low-side transistors included in the first half-bridge circuit and the second half-bridge circuit.... Agent:

20140321181 - Power conversion device: An increase in leakage current when a reverse voltage is applied to reverse-blocking insulated gate bipolar transistors is suppressed, thus reducing a loss resulting from the leakage current. A power conversion device includes a bidirectional switch formed by connecting two reverse-blocking insulated gate bipolar transistors having reverse breakdown voltage characteristics... Agent:

20140321183 - System for supplying a load: A supply system for a load with a parallel resonance and comprising a transformer having a first and a second primary winding and a secondary winding, the secondary winding being directly connected to the load, which is essentially equivalent to a capacitor and a resistor in parallel, and having the... Agent: Adv Technomig Sa

20140321184 - Synchronous rectifier: The invention relates to a synchronous rectifier (16) for integration into a power source (10) in order to provide a direct current, in particular in a cube or ashlar-shaped unit of a heavy-current transformer (12), comprising circuit elements (24), an actuation circuit (17) for actuating the circuit elements (24) and... Agent: Fronius International Gmbh

  
10/23/2014 > 26 patent applications in 17 patent subcategories.

20140313781 - Stacked switched capacitor energy buffer circuit architecture: Described herein is a stacked switched capacitor (SSC) energy buffer circuit architecture and related design and control techniques.... Agent: Massachusetts Institute Of Technology

20140313782 - Power adaptor: A power adaptor is provided. The power adaptor includes a voltage converter, a connecting port, a first transformer and a controller. The voltage converter receives an input voltage and determines whether to convert the input voltage to an output voltage according to an indicating signal. The first transformer includes a... Agent: Asustek Computer Inc.

20140313783 - Integrated switching power supply device and electric apparatus: An integrated switching power supply device includes a series-connected body, a driving control element, and external terminals. In the series-connected body, a switching element, a constant current element, and a diode are connected in series. The driving control element controls to drive the constant current element. The external terminals include... Agent: Toshiba Lighting And Technology Corporation

20140313784 - Bi-directional power converters: A transformer based isolated bi-directional DC-DC power converter may have signals for controlling power transfer in first and second directions are derived from the same side of the transformer. The converter may include a transformer, a first switching circuit, a second switching circuit, and a controller. In a first mode,... Agent: Analog Devices Technology

20140313785 - Composite electronic component, board having the same mounted thereon and power stabilizing unit including the same: A composite electronic component includes a first power stablizing unit and a second power stabilizing unit. The first power stabilizing unit includes a first input terminal receiving first power supplied from a battery, stabilizing the first power, and supplying the stabilized first power to a power managing unit. The second... Agent: Samsung Electro-mechanics Co., Ltd.

20140313786 - Controlling circuit and ac/dc converter thereof: In one embodiment, a controlling circuit configured for an AC/DC converter that receives an AC voltage supply, can include: (i) a compensation signal generator configured to generate a compensation signal that follows an error between an output signal from the AC/DC converter and an expected converter output signal during a... Agent: Silergy Semiconductor Technology (hangzhou) Ltd

20140313789 - Distributed controllers for a power electronics converter: A distributed controller module for controlling a power electronics building block of a power electronics converter includes a plurality of gate drivers for controlling power electronics switches of the power electronics building block, a first fiber optics communication interface for communication with a central controller module, a second fiber optics... Agent: Abb Technology Ag

20140313788 - Power supply device: A power supply device includes a substrate, a transformer, a rectifying section, a filtering section, at least one first capacitor section, and a second capacitor section. The substrate includes at least one semiconductor element. The transformer inputs an electric power via at least one pair of primary-side terminals, transforms the... Agent: Denso Corporation

20140313787 - Switching power supply apparatus: A switching power supply apparatus, including a power converting device body configured to switch DC input power through a first switching element to thereby store the DC input power in an inductor, and to transfer the stored power to an output capacitor through a second switching element by use of... Agent: Fuji Electric Co., Ltd.

20140313790 - Optimal trajectory control for llc resonant converter for soft start-up: By setting switching instants of a switching circuit of a resonant power converter based on current in a resonant circuit reaching a current limit of a current limitation band, soft start-up of the power converter can be achieved to avoid or limit electrical stress with full control over a trade-off... Agent: Virginia Tech Intellectual Properties, Inc.

20140313791 - Systems and methods for protecting power conversion systems under open and/or short circuit conditions: System and method are provided for protecting a power converter. The system includes a first comparator, and an off-time component. The first comparator is configured to receive a sensing signal and a first threshold signal and generate a first comparison signal based on at least information associated with the sensing... Agent:

20140313794 - Power delivery device and start-up method, ac adapter and electronic apparatus: The PD device includes: a DC/DC converter disposed between an input and an output; a primary-side controller configured to start up the DC/DC converter; and a secondary-side controller connected to an output of the DC/DC converter, the secondary-side controller AC-coupled to the output, the secondary-side controller configured to feed back... Agent: Rohm Co., Ltd.

20140313792 - Power delivery device, ac adapter, and electronic apparatus: The PD device comprises a primary-side controller configured to control an input current of a DC/DC converter disposed between an input and an output, and a secondary-side controller connected with AC coupling to the output, and configured to feedback electric power information of the output to the primary-side controller. The... Agent: Rohm Co., Ltd.

20140313793 - Power delivery device, ac adapter, electronic apparatus and power delivery system: The PD device includes: a DC/DC converter disposed between an input and an output; a primary-side controller configured to control an input current of the DC/DC converter; and a secondary-side controller connected with AC coupling to the output, and configured to feed back electric power information of the output to... Agent: Rohm Co., Ltd.

20140313795 - Single phase bi-directional ac-dc converter with reduced passive components size and common mode electro-magnetic interference: A bidirectional AC-DC converter is presented with reduced passive component size and common mode electro-magnetic interference. The converter includes an improved input stage formed by two coupled differential inductors, two coupled common and differential inductors, one differential capacitor and two common mode capacitors. With this input structure, the volume, weight... Agent: The Regents Of The University Of Michigan

20140313796 - Converter valve: A converter valve unit including a plurality of parallel connected controllable semiconducting elements. A free-wheeling diode is connected in anti-parallel with each semiconducting element. A control unit is configured to control each semiconducting element. A current sensor is connected to each of the parallel connected semiconducting elements. The current sensor... Agent: Abb Research Ltd.

20140313797 - Power electronic module: A power electronic module (30; 70), for use in a chain-link converter of a voltage source converter providing high voltage direct current power transmission and reactive power compensation, comprises a first set (32) of series-connected switching elements connected in parallel with an energy storage device (34). The first set (32)... Agent: Alstom Technology Ltd.

20140313798 - Switch control device, power supply device comprising the same and driving method of power supply device: The present invention relates to a switch controller, a power supply including the same, and a driving method thereof. An AC input of the power supply is connected to a rectification circuit. The power supply includes a power switch to which the AC input passed through the rectification circuit flows... Agent:

20140313799 - Power transforming apparatus: A power transforming apparatus implements a transformation of an energy signal and comprises a control unit, a pulse width modulation (PWM) unit, a transformation unit, and a slope compensation unit. The control unit outputs a target power signal. The PWM unit is coupled with the control unit and generates a... Agent: Delta Electronics, Inc.

20140313800 - Balanced flux isolation transformer based eighteen pulse rectification scheme for use with variable frequency drives: An AC/DC converter system comprises an input circuit for connection to a three-phase AC source. An isolation transformer comprises a symmetrical core with a set of primary windings and first and second sets of secondary windings wound on the symmetrical core providing balanced flux in all three phases and magnetically... Agent: Yaskawa America, Inc.

20140313801 - Controlled rectifier with a b2 bridge and only one switching device: The invention relates to a secondary side rectifier of an inductive energy transmission system, wherein the energy transmission system has a single-phase resonant tuned circuit, which has at least one inductor (L) and at least one capacitor and can be magnetically coupled to a primary side resonant tuned circuit, and... Agent:

20140313802 - Multilevel conversion circuit: In aspects of the invention, a multilevel conversion circuit can include a configuration for linking capacitors, including diodes, reverse-blocking semiconductor switches, and resistors, and a circuit for clamping the capacitor voltage at a specified voltage. Such a configuration can serve to reduce the number of capacitors that need detection of... Agent: Fuji Electric Co., Ltd.

20140313804 - Neutral-point-clamped multilevel power conversion device: The present invention provides a power conversion device in which an on-pulse bias voltage and a neutral-point bias voltage do not interfere with each other. A power conversion device 1 of the present invention has a polarity judgment section 8 that judges a polarity of a neutral-point bias voltage VNPC... Agent: Meidensha Corporation

20140313803 - Transformerless dc/ac converter: A method for generating an AC power signal using a transformerless DC/AC converter includes energizing a first inductor circuitry from a DC input source by controlling first, second and third switches to couple the first inductor circuitry to the DC input source; de-energizing the first inductor circuitry by controlling the... Agent: Fairchild Korea Semiconductor Ltd.

20140313805 - Self-excitation push-pull type converter: A self-excitation push-pull type converter with a transformer having a closed magnetic core or iron core, which formed of a main part (52) and a local part (53). The local part reaches magnetic saturation earlier than the main part under the same increasing magnetic field excitation. When the self-excitation push-pull... Agent: Mornsun Guangzhou Science & Technology Ltd.

20140313806 - Dc-dc converter and power conversion apparatus: In a DC-DC converter, the cooling of switching elements has been performed only by means of a cooling plate; therefore, there is a problem in that, to effectively radiate heats generated by power MOSFETs that have large heating values and that are arranged parallel, it becomes necessary to reduce thermal... Agent: Hitachi Automotive Systems, Ltd.

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