Electric power conversion systems patents - Monitor Patents
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Electric power conversion systems March listing by industry category 03/12

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.
  
03/29/2012 > 14 patent applications in 11 patent subcategories. listing by industry category

20120075888 - Duty balancing oscilator: The oscillator determines a first half cycle of a duty signal determining the switching frequency by using a reference current according to a feedback signal corresponding to the output voltage. The oscillator senses a first half cycle period by using an output of the frequency setting unit, and determines the... Agent:

20120075889 - Switching power supply device: A switching power supply device includes: a fundamental wave component extraction circuit for extracting a fundamental wave component of a voltage induced across a first winding; an oscillator for generating a clock signal having an oscillation frequency that changes according to a change in the fundamental wave component; and a... Agent:

20120075890 - Gate driver and switching power source apparatus: A gate driver of a switching element includes a first capacitor having a first end connected to a DC power source, a first switch having a first electrode connected to the first end of the first capacitor and a second electrode connected to a negative electrode of the DC power... Agent: Sanken Electric Co., Ltd.

20120075891 - Systems and methods for constant voltage mode and constant current mode in flyback power converters with primary-side sensing and regulation: System and method for regulating a power converter. The system includes a first signal generator configured to receive a first sensed signal and generate an output signal associated with demagnetization. The first sensed signal is related to a first winding coupled to a secondary winding for a power converter, and... Agent: On-bright Electronics (shanghai) Co., Ltd.

20120075892 - Discontinuous pulse width drive modulation method and apparatus: 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... Agent: Rockwell Automation Technologies, Inc.

20120075893 - Inverter device overvoltage protection method: An inverter device overvoltage protection method that can appropriately protect an inverter device from an overvoltage condition is disclosed. When the DC voltage rises, and a DC voltage detection value exceeds a second DC voltage level, a protective circuit stops the inverter device by outputting an inhibit signal to a... Agent: Fuji Electric Co., Ltd.

20120075894 - Configurable power supply assembly: An apparatus, device, and system for generating an amount of output power in response to a direct current (DC) power input includes a configurable power supply, which may be electrically coupled to the DC power input. The configurable power supply is selectively configurable between multiple circuit topologies to generate various... Agent:

20120075895 - Universal-voltage discrete input circuit: A universal-voltage discrete input circuit uses a high voltage depletion-mode field effect transistor in combination with a low-voltage, adjustable precision shunt regulator and an isolation circuit for interfacing a low voltage digital logic circuit to a switched external voltage ranging from about 7 volts to about 1000 volts AC or... Agent: Cooper Technologies Company

20120075897 - Rectifier circuit and semiconductor device using the same: An object is to provide a rectifier circuit of which the drop in the output voltage by the threshold voltage of a transistor used as a rectifier element is suppressed. Another object is to provide a rectifier circuit whose variations in the output voltage are suppressed even in the case... Agent: Semiconductor Energy Laboratory Co., Ltd.

20120075896 - System and method to boost voltage: A system and method are provided for increasing and maintaining voltage. A transformer's secondary windings are connected between the hot input line and the hot output line, and are not switched. The secondary windings may be in series for 220/230 Vrms, and in parallel for 120/127 Vrms. Alternatively, the transformer... Agent: The Powerwise Group, Inc.

20120075899 - Interconnection inverter device: The interconnection point of capacitors C1, C2 is connected with one end of an electric power system and one end of a reactor L. First switch section (S1, D1) is connected, at its respective ends, to the positive electrode of the direct-current DC power source, and to the other end... Agent: Mitsubishi Electric Corporation

20120075898 - Photovoltaic power converters and closed loop maximum power point tracking: Power converters for photovoltaic (PV) systems and maximum power point tracking techniques are disclosed. One example power converter for a PV system includes an input for coupling to the PV system, an output for providing an output voltage, and a switch coupled between the input and the output. The input... Agent: Astec International Limited

20120075900 - Controller for load drive system: A controller for a load drive system having a converter for changing an output voltage of a DC power supply, an inverter for transforming a DC voltage outputted from the converter into a three-phase AC voltage to be applied onto a load and a smoothing capacitor provided in parallel between... Agent: Honda Motor Co., Ltd.

20120075901 - Geothermally cooled power conversion system: Embodiments of the present invention provide novel techniques for cooling power conversion circuitry. In particular, a geothermal conditioning system may be used that includes a ground loop heat exchanger. The ground loop heat exchanger may pump heat from the power conversion circuitry into the ground in order to cool the... Agent: Rockwell Automation Technologies, Inc.

  
03/22/2012 > 18 patent applications in 15 patent subcategories. listing by industry category

20120069602 - Method and arrangement for tracking the maximum power point of a photovoltaic module: A method and apparatus of tracking the maximum power point of a photovoltaic module. The method includes measuring an output voltage of the photovoltaic module, determining an output voltage of the inverter connected to the photovoltaic module, and measuring output current of the inverter connected to the photovoltaic module. A... Agent: Abb Research Ltd

20120069603 - Adapter power supply: An adapter power supply includes an AC/DC converter converting a commercial AC power into a DC power; a DC/DC converter including a transformer composed of a primary terminal and a secondary terminal in order to output an output power by converting a link voltage of the DC power; and a... Agent: Samsung Electro-mechanics Co., Ltd.

20120069604 - Compact power converter with high efficiency in operation: A power converter including a main circuit and a sub-circuit. The main circuit serves as a step-up/down chopper circuit including a series-connected assembly of main switches, an inductor coupled to a joint of the main switches, and a capacitor connected in parallel to the series-connected assembly. The sub-circuit is designed... Agent: Denso Corporation

20120069605 - Sampled charge control for resonant converter: This document discusses, among other things, apparatus and methods for controlling a converter. In an example, a voltage-controlled oscillator (VCO) can be configured to provide a first pulse train to control the converter. The frequency of the first pulse train of the VCO can be modulated using information indicative of... Agent:

20120069606 - Very high frequency switching cell-based power converter: In an aspect, the present invention provides a high frequency switching power converter. The high frequency switching power converter may include a plurality of soft-switchable power cells flexibly connected to receive an input signal in series and provide an output. The high frequency switching power converter may further include a... Agent: Onchip Power

20120069607 - Inverter and driving method thereof: An inverter and driving method of the inverter are disclosed. The inverter includes an active clamp forward (ACF) converter and a flyback converter. One of a forwarding operation of delivering current from a primary side to a secondary side by using the ACF converter and a backwarding operation of delivering... Agent:

20120069608 - Control circuit with burst mode and extended valley switching for quasi-resonant power converter: A control circuit for power converter according to the present invention comprises a PWM circuit generating a switching signal coupled to switch a transformer of the power converter. A feedback input circuit is coupled to an output of the power converter for generating a feedback signal. The feedback signal is... Agent:

20120069609 - Method for lowering power loss and circuit: A method and circuit for suppressing a bias current and decreasing power consumption. A current suppression circuit is coupled to a circuit element, which is capable of conducting the bias current. Coupling the current suppression circuit to the circuit element forms a node. In one operating mode, the current suppression... Agent:

20120069610 - Converter: A multilevel voltage source converter for high voltage DC power transmission and reactive power compensation. The voltage source converter includes at least one phase element including a plurality of semiconductor switches to interconnect a DC voltage and an AC voltage. The voltage source converter also includes at least one auxiliary... Agent: Alstom Grid Uk Limited

20120069611 - Correction circuit of a switching-current sample for power converters in both ccm and dcm operation: The present invention provides a correction circuit for a power converter. The correction circuit includes a sampling circuit, a demagnetizing-time circuit, a duty circuit, and a compensation circuit. The sampling circuit generates an average-current signal in response to a switching current of the power converter. The demagnetizing-time circuit generates a... Agent: System General Corporation

20120069612 - Arrangement for exchanging power: An arrangement for exchanging power with a three-phase electric power network includes a Voltage Source Converter having three phase legs with each a series connection of switching cells. The three phase legs are interconnected in a neutral point by forming a wye-connection. The arrangement also includes a device connected to... Agent:

20120069613 - Transfer control device: There is provided a control device which controls a transformer in accordance with a total loss imposed on a load driving system including the transformer and a load. In a control device of a transformer that boosts or drops an output voltage of a DC power supply and provides the... Agent: Honda Motor Co., Ltd.

20120069614 - Power supply system and method including power generator and storage device: The present invention relates to a power supply system and method including a power generator and a storage device. Specifically, the power supply method using a power supply system which includes a power generator, a storage device, a unidirectional converter, and a bidirectional interleaved converter, and in which the other... Agent:

20120069615 - Bridgeless power factor correction converter: A bridgeless power factor correction converter is configured such that a gate driver controls the ON ratio of a booster converter switch so that the ON ratio is gradually increased from 0, i.e., performs soft start control, every time the voltage polarity of an AC input in a totem-pole bridgeless... Agent: Tdk Corporation

20120069616 - Switching power supply device, and adjustable power supply system including the same: According to one embodiment of the invention, there is provided a switching power supply device including a rectifying circuit and a switching operation conversion circuit. The rectifying circuit receives a phase-controlled alternating voltage to rectify to a direct voltage. The switching operation conversion circuit starts up by being applied with... Agent: Toshiba Lighting & Technology Corporation

20120069617 - Switching power converters and controllers having auxiliary power circuits: Switching device controllers, drive circuits, power converters and related methods are disclosed. One example controller for a switching device includes a drive circuit for controlling the switching device and an auxiliary circuit coupled to the drive circuit. The auxiliary circuit includes an input for receiving a waveform having alternating first... Agent: Astec International Limited

20120069618 - Inverter control system: An inverter control apparatus is provided that offers a ‘soft turn off’ to a gate operation of the inverter so as to securely protect the IGBT. In particular, an inverter control system according to the present invention may include a gate operating portion that controls turn on/off of an IGBT... Agent: Hyundai Motor Company

20120069619 - Modular power converters usable alone or in a multiphase power converter: A power converter module for use alone or with other modules in a multiphase power converter. The power converter module has an enclosure that surrounds internal components to prevent radiation of electromagnetic energy, which internal components also limit conduction of electromagnetic energy. The internal components include an EMI filter, a... Agent: Northern Power Systems, Inc.

  
03/15/2012 > 17 patent applications in 14 patent subcategories. listing by industry category

20120063172 - Boost converter: There is provided a boost converter capable of reducing voltage stress within each element thereof, without using a separate loss snubber circuit, by clamping a voltage applied to an output diode to correspond to a difference between an input voltage and an output voltage. The boost converter includes a transformer... Agent: Samsung Electro-mechanics Co., Ltd.

20120063173 - Common mode noise reduction apparatus and method: An embodiment common mode noise reduction apparatus comprises a common mode choke, a balance inductor, a first capacitor and a second capacitor. The common mode choke is placed between an input dc source and a primary side network of an isolated power converter. The balance inductor is coupled between an... Agent: Futurewei Technologies, Inc.

20120063174 - Power factor correct current resonance converter: A power factor correct current resonance converter is disclosed which eliminates interference of switching operations between two cascade-connected converter circuits. The power factor correct current resonance converter includes a current resonance converter circuit having switches, a resonance capacitor, a resonance inductor, a transformer, diodes, a smoothing capacitor, and a control... Agent: Fuji Electric Co., Ltd.

20120063175 - Compensation circuit and method for a synchronous rectifier driver: Provided are circuits and methods for driving the synchronous rectifier (SR) of a power converter. A non-linear voltage sense compensator is applied across the drain and source of the SR, and a sense signal is provided to the SR driver sense input, such that false triggering of the SR is... Agent:

20120063176 - Power converting device for vehicle: A control device for a vehicle, the control device including, in a housing that is installed under a floor of the vehicle: a power converter configured of a semiconductor switching circuit; a control unit that controls the output of the power converter so as to supply a required load to... Agent: Mitsubishi Electric Corporation

20120063178 - Power converter: A converter includes switching devices connected between each of a plurality of input ends and a DC power supply line, and switching devices connected between each of the plurality of input ends and a DC power supply line. A capacitor, a resistor and a diode are connected in series with... Agent:

20120063177 - Solar photovoltaic power conditioning units: We describe a photovoltaic power conditioning unit comprising: both dc and ac power inputs; a dc link; at least one dc-to-dc converter coupled between dc input and dc link; and a dc-to-ac converter coupled between dc link and ac output. The dc-to-dc converter comprises: a transformer having input and output... Agent:

20120063179 - System and method for damping lc circuits in power conversion systems: A power conversion system comprises a power converter comprising a plurality of semiconductor power switches, an LC filter coupled between an output of the power converter and an electric grid, and a power conversion control system. The LC filter comprises an inductor coupled in series to the electric grid, and... Agent:

20120063180 - Protection circuit for a power conversion apparatus: A protection circuit that interrupts a supply of power to a driving circuit for a power conversion apparatus upon detection of an abnormality includes switches connected in series between the power supply and the driving circuit. An interruption signal enabling/disabling circuit controls the transmission of an interruption signal from the... Agent: Fuji Electric Co., Ltd.

20120063181 - Modular voltage source converter: Voltage source converter based on a chain-link cell topology including one or more phases, each of the phases having one or more series-connected chain-link cell modules connected to each other. The output voltage of the voltage source converter is controlled by control signals applied to the series-connected chain-link cell modules.... Agent:

20120063182 - Converter control system: l

20120063183 - Power supply input device: A power supply input device including a first resistance of a discharge resistance conversion unit connected in parallel to a discharge resistance unit; and a switching unit of the discharge resistance conversion unit connected to the first resistance and performing a switching operation according to an externally received control signal,... Agent: Samsung Electronics Co., Ltd.

20120063184 - Zero-voltage-switching scheme for high-frequency converter: Method for operating an ac/ac converter circuit for a high-frequency-link converter. The ac/ac converter circuit converts an ac input voltage to an ac output voltage. When the ac input voltage is zero, each of a pair of switches for both first and second arms are caused to be on. Current... Agent: The Board Of Trustees Of The University Of Illinois

20120063186 - Low current consumption electrical control switch: The invention provides a low current consumption control switch device and method related thereto. The control switch device includes a switch control component, a microprocessor, a wireless signal receiver for receiving control signal and a DC power supply. The DC power supply draws an AC current from the AC power... Agent:

20120063185 - Modular switch for an electrical converter, electrical converter, as well as method for operating an electrical converter: Described is a modular switch for an electrical converter. The modular switch is provided with a first series circuit including a first controllable power semiconductor component and a first diode as well as with a second series circuit including a second diode and a second controllable power semiconductor. The connecting... Agent: Converteam Gmbh

20120063187 - Inverter device: An inverter device that converts electric power between a direct current and an alternating current. The inverter is configured with an inverter circuit and a control circuit. The control circuit substrate includes a driver circuit that supplies a control signal for each switching element. The driver circuit is placed so... Agent: Aisin Aw Co., Ltd.

20120063188 - Inverter device relay-connecting member: A relay-connecting member (16) has relay terminals (32), each of which is fit-connected to an output electrode (28) and a male tab (30) of an output terminal (14). With this structure, by simply inserting the output electrode (28) and the male tab (30) of the output terminal (14) into the... Agent: Kohshin Electric Corp.

  
03/08/2012 > 17 patent applications in 15 patent subcategories. listing by industry category

20120057372 - Control arrangement for a resonant mode power converter: A resonant mode power converter is controlled with a control unit including a current limiting circuit coupled to receive a first current representative of a power converter output and a second current generated in response to a reference voltage. The current limiting circuit is coupled to limit the first current... Agent: Power Integrations, Inc.

20120057374 - Duty adjuster circuit and converter including the same: r

20120057373 - Boost-forward-flyback high gain converter: A boost-forward-flyback convertor has a boost converting circuit, a forward converting circuit, a flyback converting circuit and a transformer. The boost converting circuit, the forward converting circuit and the flyback converting circuit are coupled by using elements of the boost and forward converting circuits to form the transformer. The boost-forward-flyback... Agent:

20120057375 - Method and apparatus for a flyback power converter providing output voltage and current regulation without input capacitor: A control circuit of a power converter according to the present invention comprises an output circuit, at least one input circuit and an input-voltage detection circuit. The output circuit generates a switching signal for regulating an output of the power converter in response to at least one feedback signal. The... Agent: System General Corp.

20120057376 - Power supply circuit: It is an object to obtain a detection circuit for detecting feedback voltage without variation in output voltage/current or in output voltage by the operation temperature, and a power supply circuit including thereof. A power supply circuit includes a detection circuit, an amplifier circuit outputting an output voltage, a control... Agent: Semiconductor Energy Laboratory Co., Ltd.

20120057378 - Static conversion method and system for the regulation of power in an alternating current electrical network:

20120057377 - Uninterruptible power supply with a dual gain voltage regulator controlling an inverter output voltage based on active and reactive components of current: An uninterruptible power supply (UPS) system has an inverter having an output coupled to a primary side of an output transformer. The UPS system has a controller having a dual gain voltage regulator for controlling the output voltage of the inverter of a UPS system that uses active and reactive... Agent: Liebert Corporation

20120057379 - Power supply circuit for remotely turning-on electrical appliances: A power supply circuit for an electrical appliance, including a turning-on stage configured for determining a transition from a turned-off state, in which the power supply circuit is off and does not supply electric power, to a turned-on state of the power supply circuit. The turning-on stage includes a transducer... Agent: Stmicroelectronics S.r.l.

20120057380 - Multilevel inverter: A multilevel inverter includes an inverter arm. The inverter arm is provided between a highest electric potential point and a lowest electric potential point, and includes (i) a second switching element group to which switching elements that are connected in series belong, the switching elements being connected to respective diodes... Agent:

20120057381 - Electric-power conversion apparatus: There is provided an electric-power conversion apparatus including a chopper circuit; a current sense resistor that detects the output current of the chopper circuit; a differential detection circuit that outputs, as a differential detection signal (vo), the electric potential difference across the current sense resistor; and a calculation means that... Agent: Mitsubishi Electric Corporation

20120057382 - Power factor correction converter: A switching control circuit includes an A/D converter that converts detection signals of an input voltage detection circuit, a current detection resistor, and an output voltage detection circuit into a digital signal, a D/A converter that provides a reference voltage to an analog comparator, a PWM circuit that outputs a... Agent: Murata Manufacturing Co., Ltd.

20120057383 - Standalone and grid-tie power inverter: A standalone and grid-tie power inverter includes a DC-to-AC converter, an output circuit electrically connected to the DC-to-AC converter, and a control unit electrically connected to the DC-to-AC converter and the output circuit. The DC-to-AC converter converts a DC power source into an AC power output. The output circuit includes... Agent: Chung-sham Institute Of Science And Technology, Armaments, Bureau, Ministry Of National Defense

20120057384 - Method of adapting a configuration of a voltage converting device and voltage converting unit for a voltage converting device: A method of adapting a configuration of a voltage converting device is provided. The voltage converting device includes a plurality of voltage converting units in parallel electrical connection to one another, and a plurality of inter-bridge transforming units. Each of the inter-bridge transforming units has a primary coil and a... Agent:

20120057385 - Power control circuit: This invention relates to a power control circuit, and, an inventive PWM controller, switching circuit, high voltage discharge circuit and magnetic amplifier are also introduced and used to construct the power control circuit. The power control circuit has featured power saving and wide frequency band.... Agent:

20120057386 - Semiconductor element, semiconductor device, and power converter: A semiconductor element 100 including an MISFET according to the present invention is characterized by having diode characteristics in a reverse direction through an epitaxial channel layer 50. The semiconductor element 100 includes a silicon carbide semiconductor substrate 10 of a first conductivity type, a semiconductor layer 20 of the... Agent: Panasonic Corporation

20120057387 - Hybrid switch for resonant power converters: A hybrid switch comprising two semiconductor switches connected in parallel but having different voltage drop characteristics as a function of current facilitates attainment of zero voltage switching and reduces conduction losses to complement reduction of switching losses achieved through zero voltage switching in power converters such as high-current inverters.... Agent:

20120057388 - Solar photovoltaic inverters: The invention relates to improved techniques for manufacturing power conditioning units (inverters) for use with photovoltaic (PV) modules, and to inverters manufactured by these techniques. We describe a solar photovoltaic inverter, comprising: a power conditioning circuit mounted on a circuit board, the power conditioning circuit having a dc power input... Agent:

  
03/01/2012 > 17 patent applications in 14 patent subcategories. listing by industry category

20120051094 - Isolated dc-dc converter including zvs full-bridge and current doubler: An isolated DC to DC converter including zero voltage switching and a current doubler. Current sensors are located between a positive input of the DC to DC converter and a current doubler is used in an output stage of the DC to DC converter in order to enable more accurate... Agent:

20120051095 - Dc to dc power converters and methods of controlling the same: A power generation system configured to provide direct current (DC) power to a DC link is described. The system includes a first power generation unit configured to output DC power. The system also includes a first DC to DC converter comprising an input section and an output section. The output... Agent:

20120051096 - Open loop dc to dc converters with enable/disable circuits: Power supplies, power adapters, and related methods are disclosed. One example power supply includes an open loop DC to DC converter having an input for connecting to an input power source and an output for supplying a DC output voltage or current and an enable/disable circuit coupled to the open... Agent: Astec International Limited

20120051097 - Power converter with boost-buck-buck configuration: A regulated power apparatus is provided. The apparatus includes an input power converting circuit configured for receiving a rectified voltage and for generating an increased voltage. An intermediate power regulating circuit generates a regulated voltage that has a lower voltage than a minimum output voltage of the input power converting... Agent: Flextronics Ap, LLC

20120051098 - Method and apparatus for power converter fault condition detection: An example controller includes a feedback circuit coupled to provide feedback information representative of an output of the power converter during at least a portion of an OFF time of a power switch. A sense input receives a sense signal that is representative of a reflected voltage representative of an... Agent: Power Integrations, Inc.

20120051099 - Power supply circuit and power conversion device: A power conversion device includes an inverter circuit converting DC power into AC power and including switching devices constituting upper and lower arms, a control circuit controlling the switching devices, a drive circuit driving the switching devices by a signal from the control circuit, and an insulated power supply circuit... Agent: Hitachi Automotive Systems, Ltd.

20120051100 - Universal power converter: Methods and systems for transforming electric power between two or more portals. Any or all portals can be DC, single phase AC, or multi-phase AC. Conversion is accomplished by a plurality of bi-directional conducting and blocking semiconductor switches which alternately connect an inductor and parallel capacitor between said portals, such... Agent: Ideal Power Converters, Inc.

20120051102 - Power converter system and methods of operating a power converter system: A power converter system includes a converter configured to be coupled to a power generation unit for receiving power from the power generation unit, and a bus coupled to the converter, wherein a voltage is generated across the bus when electricity is conducted through the power converter system. The power... Agent:

20120051101 - Power inverter system and method of starting same at high dc voltage: A power inverter system includes a plurality of power semiconductor switching devices. Each switching device includes a corresponding gate turn off resistance configured to increase during starting up periods of the inverter system such that the open circuit voltage of a corresponding power source providing power to the power inverter... Agent: General Electric Company

20120051103 - Power converter: A power converter converts DC power supplied from a first DC power supply and a second DC power supply into AC power and supplies the AC power to a load. The power converter includes a protection circuit for allowing a charging current, which is possibly to flow from the first... Agent: Toshiba Mitsubishi-electric Indus Sys. Corp.

20120051105 - Led driver with low harmonic distortion of input ac current and methods of controlling the same: A method of controlling an output current of a power supply circuit comprising a first converter stage for receiving an input voltage, a second converter stage delivering a regulated output current, a controlled switch for conducting the input current and the output current, the method comprising: detecting a portion of... Agent:

20120051104 - Single-phase voltage type ac/dc converter, three-phase voltage type ac/dc converter, and stabilization control method: By applying an autonomous parallel operation control technique of an AC/DC converter to a load, which receives power from a distribution network, drooping characteristics (governor-free characteristics) for a frequency of active power and voltage-maintaining characteristics (V-Q characteristics) may be obtained. The governor-free characteristics are the characteristics to automatically decrease received... Agent: Origin Electric Company Limited

20120051106 - Methods and systems for operating power converters: A switching circuit for use in a power converter is provided. The switching circuit includes an insulated gate bipolar transistor (IGBT) including a gate terminal, a collector terminal, and an emitter terminal, a gate drive circuit electrically coupled to the gate terminal and configured to switch the IGBT on and... Agent:

20120051108 - Current ripple reduction power conversion circuits: A circuit used to convert DC input to AC output comprises a transformer and three series sub-circuits. The first series sub-circuit is connected in parallel with the DC input and comprises first and second capacitors connected in series. The secondary series sub-circuit is connected in parallel with the DC input... Agent: National Taiwan University Of Science And Technology

20120051107 - Method and apparatus for bridgeless power factor correction: This document discusses, among other things, an improved bridgeless power factor correction (PFC) circuit. In an example, the PFC circuit can include a first switch and a control circuit, the control circuit configured to provide a switching cycle, to generate a carrier signal corresponding to the switching cycle, and to... Agent:

20120051109 - Active rectifier with delay locked loop, wireless power receiving apparatus including active rectifier: An active rectifier and a wireless power receiver including the active rectifier are provided. According to an aspect, an active rectifier may include: a first loop configured to provide voltage when the phase of an input signal is positive; and a second loop configured to provide voltage when the phase... Agent:

20120051110 - Dc-to-ac power inverter and methods: Embodiments of the invention relate generally to semiconductors for power generation and conversion applications, and more particularly, to devices, integrated circuits, substrates, and methods to convert direct current (“DC”) voltage signals to alternating current (“AC”) voltage signals. In some embodiments, a method for converting DC voltage signals to AC voltage... Agent: Nphysics, Inc.

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