|Electric power conversion systems patents - Monitor Patents|
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Electric power conversion systemsBelow 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. 02/27/2014 > 16 patent applications in 14 patent subcategories.
20140056032 - High-efficiency high step-up ratio direct currentconverter with interleaved soft-switchingmechanism: A high-efficiency high step-up ratio direct current converter with an interleaved soft-switching mechanism is provided. The direct current converter includes a voltage-multiplier circuit and an active clamping circuit. The voltage-multiplier circuit includes two isolating transformers, two main switches disposed on a primary side of the two isolating transformers, four diodes... Agent: Allis Electric Co., Ltd.
20140056033 - Electronic apparatus and power controlling method thereof: An electronic apparatus and a power controlling method thereof are provided. The electronic apparatus includes a system unit supplied with power to conduct an operation, and a power supply unit including a power control unit controlling output of standby power, and supplying the standby power to the system unit. The... Agent: Samsung Electronics Co., Ltd.
20140056034 - Dc/dc converter, electronic apparatus having the same and dc/dc conversion method thereof: A multi-output DC/DC converter, which may be included in an electronic apparatus, performs sync switching control using a simplified configuration. The DC/DC converter may include a first switching unit which alternately switches input DC power and converts the DC power into AC power, a converter which converts the AC power... Agent: Samsung Electronics Co., Ltd.
20140056035 - Method and arrangement for improved operability of a high temperature fuel cell system: 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... Agent: Convion Oy
20140056036 - Ac-to-dc power converter and control method and control integrated circuit thereof: An AC-to-DC power converter with a BJT as a power switch can set a base current of the BJT by a current setting resistor which is in the outside of a control integrated circuit. Since an output current and a recovery current of the BJT are injected into a sensing... Agent: Richtek Technology Corporation
20140056037 - Control circuit and interleaved power supply including that control circuit: A control circuit that controls an interleaved power supply, and an interleaved power supply including that control circuit, which are unlikely to be affected by a variation among components and are suitable for mass production, are provided. The clock generator generates a clock pulse having a predetermined frequency. The signal... Agent:
20140056038 - Ac conversion circuit: The AC converter converts a single-phase input AC voltage with a frequency f0 into a three-phase output AC voltage with a frequency f1 that is lower than f0. The AC converter includes a switching section 101 with multiple switching elements and a switching control section 103 that controls the conduction... Agent: Panasonic Corporation
20140056039 - Method and apparatus for ac-to-dc power conversion: In one aspect, the present invention reduces electromagnetic interference (EMI) caused by a capacitive dropper power supply by synchronizing the openings and closings of a shunt switched used for regulation control of the DC output voltage generated by the power supply, to zero crossings of AC current from the current-limiting... Agent:
20140056040 - Power supply apparatus for an electrical appliance: A power supply apparatus includes a power supply circuit and a power-on circuit. The power-on circuit detects a remotely transmitted control signal and causes a transition of the power supply circuit to a turned on state. The power-on circuit includes a transducer configured to provide a power-on signal in response... Agent: Stmicroelectronics S.r.l.
20140056041 - Power generation system, 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: General Electric Company
20140056042 - Power layer generation of inverter gate drive signals: Solid state switches of inverters are controlled by timing signals computed in power layer interface circuitry for individual inverters. Multiple inverters may be placed in parallel with common three-phase output. Common control circuitry generates timing signals or data used to reconstruct the common signals and sends these signals to the... Agent: Rockwell Automation Technologies, Inc.
20140056043 - Power generator, and electric equipment using it: A power generator includes a power generating device that generates a power by receiving vibration, and a power converter that converts the output of the power generating device. The power generating device outputs powers through a first system and a second system. The power converter is driven by receiving the... Agent:
20140056044 - Photovoltaic inverter and a control method thereof: A photovoltaic inverter includes an input circuit, a decoupling circuit and an output circuit. The input circuit has a DC input port, an input capacitor, a magnetizing inductor, a first unidirectional element and a first switch. The magnetizing inductor forms first and second connection nodes. The decoupling circuit has a... Agent:
20140056045 - Control circuit for power converter, conversion system and controlling method thereof: The disclosure provides a control circuit for a power converter, a conversion system and a controlling method thereof. The conversion system includes an AC power supply, a power converter and a control circuit. The power converter includes a first and second bridge arms connected in parallel. The first bridge arm... Agent:
20140056047 - High-efficiency bias voltage generating circuit: Disclosed are bias voltage generating circuits and methods for a switching power supply. In one embodiment, a switching power supply can include: (i) a driver circuit configured to receive a bias voltage, and to drive a switch in a power stage of the switching power supply; (ii) where a ratio... Agent: Silergy Semiconductor Technology (hangzhou) Ltd
20140056046 - Passive power factor correction circuit, electronic device applying the same and operation methods thereof: A passive power factor correction circuit includes: a DC capacitor and an input capacitor, coupled to a rectifying circuit and charged by a DC voltage from the rectifying circuit; an output capacitor, coupled to a load; first diode and a second diode, coupled to the input capacitor and the output... Agent: Industrial Technology Research Institute02/20/2014 > 12 patent applications in 8 patent subcategories.
20140049990 - Soft-switching high voltage power converter: In a general aspect, a charge transfer includes a transformer including a plurality of primary windings and a plurality of galvanically isolated secondary windings, a first plurality of resonant converters having input terminals connected in series to an input power terminal and having output terminals connected to different primary windings... Agent:
20140049991 - Power device: An energy efficient apparatus includes a switching device, a frequency dependent reactive device, and a control element is provided. The switching device is coupled to a source of electrical power and includes a pair of transistors and is adapted to receive a control signal and to produce an alternating current... Agent: Advanced Charging Technologies, LLC
20140049993 - Power factor correction: A power factor correction circuit includes an inductor L1, a diode D1, a switch Q3 and a controller 24. An input voltage Vin is applied to the inductor L1 which is cyclically discharged through the diode D1 by the operation of the switch Q3. The switch Q3 is controlled by... Agent: Tridonic Gmbh & Co Kg
20140049992 - Switching power supply: A switching power supply is suitable for transforming AC input voltage to DC output voltage. The switching power supply includes a transformer, a power circuit, an output circuit, a switching element, a control element, a shielding element and a metal element. The power circuit is coupled to the primary side... Agent: Asian Power Devices Inc.
20140049994 - Device for synchronous dc-dc conversion and synchronous dc-dc converter: A DC-DC converter transforms a DC input voltage to generate a DC output voltage by complementary switching control of a main switching transistor and a synchronous rectifying transistor. The DC-DC converter includes a soft-start circuit configured to generate a soft-start voltage rising from an initial voltage at start-up of the... Agent: Panasonic Corporation
20140049995 - Diagnostics for multi-level medium voltage drive using mechanical bypass: A system and method for performing diagnostics in a medium voltage drive. The system includes a power cell and a bypass mechanism. The bypass mechanism is operably connected to output terminals of the power cell and configured to create a shunt path between the output terminals. The bypass mechanism includes... Agent: Siemens Industry, Inc.
20140049996 - Hybrid dc-to-ac conversion system and method of operating the same: A hybrid DC-to-AC conversion system includes a first DC input voltage, a second DC input voltage, a power conversion apparatus, and a comparison unit. The power conversion apparatus is connected in parallel to the first DC input voltage and the second DC input voltage to convert the first DC input... Agent: Delta Electronics, Inc.
20140049998 - Dc to ac power converter: A direct current to alternating current converter method and apparatus is disclosed that may comprise a direct current (DC) input source; an alternating current (AC) output inverter circuit, having an input connected across the DC input source; a partial power DC-DC boosting circuit intermediate to the DC input source and... Agent:
20140049999 - Modulation of switching signals in power converters: There is provided a method and control system for reducing noise in a power converter by controlling a switching device in the power converter according to a modulation scheme. The switching device couples a direct current (DC) source to provide an alternating current (AC) output at a particular switching frequency.... Agent: Control Techniques Limited
20140049997 - Transformerless multiple output capable power supply system: An energy efficient apparatus includes a switching device, a frequency dependent reactive device, and a control element is provided. The switching device is coupled to a source of electrical power and includes a pair of transistors and is adapted to receive a control signal and to produce an alternating current... Agent: Advanced Charging Technologies, LLC
20140050000 - Dc-link voltage balancing control for multilevel inverters: A method for balancing a voltage of an inverter determines an expected voltage of a capacitor based on a voltage of the capacitor at a start of a switching cycle and determines a duty cycle minimizing a value of an objective function representing a difference between the expected voltage of... Agent:
20140050001 - Reactor, composite material, reactor core, converter, and power conversion device: A reactor 1A includes a single coil 2 formed by spirally winding a wire 2w and a magnetic core 3 that is disposed inside and outside the coil 2 and forms a closed magnetic circuit. The magnetic core 3 includes an inner core portion 31 disposed inside the coil 2... Agent: Sumitomo Electric Industries, Ltd.02/13/2014 > 23 patent applications in 17 patent subcategories.
20140043860 - Controlling an adapter transformer voltage: Embodiments of an adapter are disclosed that include a transformer with a primary coil coupled to an H-bridge. The H-bridge is controlled by a control circuit that controls a voltage across the primary coil using the H-bridge, and the control circuit is configured to control the H-bridge so that during... Agent: Apple Inc.
20140043861 - Controlling an adapter transformer voltage: An adapter for electrical power that includes a rectifier coupled to a transformer with a primary coil and a secondary coil. The secondary coil includes a first end tap, a second end tap, and a center tap. A first switch is coupled between the first end tap and a primary... Agent: Apple Inc.
20140043863 - Novel control method to reduce switching loss on mosfet: A method of controlling a switching mode power converter enables zero voltage switching by forcing a voltage across the main switch to zero. This is accomplished by sensing when a current on the secondary side of the power converter drops to zero, or other threshold value, and then generating a... Agent: Flextronics Ap, LLC
20140043862 - Power adapter: Embodiments of an adapter are disclosed that include a rectifier with an input and an output coupled to a step-down transformer with a primary coil and a secondary coil, wherein the primary coil is coupled to the output of the rectifier. A step-up converter is coupled to the secondary coil.... Agent: Apple Inc.
20140043864 - Power supply circuit using dc/dc converter: A power supply circuit comprises an input for receiving a power supply from a battery and a DC/DC converter for supplying a converted voltage to a load. A regulator is used for controlling the DC/DC converter such that the current drawn from the converter is smoothed. A charge storage device... Agent: Nxp B.v.
20140043865 - Synchronous rectifier control techniques for a resonant converter: A resonant converter system includes a first stage having inverter circuitry and resonant tank circuitry configured to generate an AC signal from a DC input signal, a transformer configured to transform the AC signal, and a second stage. The second stage features synchronous rectifier (SR) circuitry including a plurality of... Agent: Fairchild Semiconductor Corporation
20140043866 - High efficiency and low loss ac-dc power supply circuit and control method: Disclosed herein are high efficiency, low loss AC-DC power supply circuits, and associated control methods. In one embodiment, an AC-DC power supply circuit can include: (i) a rectifier configured to rectify an AC power supply to generate a DC input voltage; (ii) a first stage voltage converter configured to convert... Agent:
20140043867 - Switching power supply device control circuit and switching power supply: A switching power supply device control circuit and switching power supply can combat fluctuation due to the input voltage in the peak current of a switching element, even when using an oscillator. A control IC is connected to a switching element and to a current detecting resistor, and controls the... Agent: Fuji Electric Co., Ltd.
20140043869 - Power supply apparatus and image forming apparatus: The power supply apparatus includes a switch element for turning ON and OFF supply of electric power to a primary winding of a transformer; a determining unit connected to an auxiliary winding of the transformer, for determining an ON-time of the switch element; and a switching unit for switching the... Agent: Canon Kabushiki Kaisha
20140043868 - Switching power supply system and control circuit of the switching power supply system: A switching power supply system includes a transformer having a primary winding, a secondary winding and a tertiary winding, a switching device inputted to the primary winding carrying out switching operation on the basis of a first control signal or a second control signal, an output voltage producing section rectifying... Agent: Fuji Electric Co., Ltd.
20140043870 - Three phase boost converter to achieve unity power factor and low input current harmonics for use with ac to dc rectifiers: A voltage source inverter comprises a zigzag transformer providing a neutral point. A rectifier unit comprises three single phase boost converters each connected to one of the three phases of AC power and the neutral point and comprising a bridge rectifier converting single phase AC power to DC power and... Agent: Yaskawa America, Inc.
20140043871 - Emi filter using active damping with frequency dependant impedance: A circuit for providing damping in an electromagnetic interference (EMI) filter with an inductor-capacitor (LC) circuit, includes at least one capacitor connected to receive a common-mode current from the LC circuit; a current sensor that senses the common-mode current; a linear amplifier that amplifies the sensed common-mode current; and a... Agent: Hamilton Sundstrand Corporation
20140043872 - Control device for a switching device with separate start-up and holding coils: A control device for a switching device with separate start-up and holding coils includes control electronics to control the current supply to the start-up and holding coils and a direct voltage supply unit for the holding coil and the control electronics with the same reference potential for the holding coil... Agent:
20140043873 - Method in a voltage source chain-link converter, computer programs and computer program products: A method in a voltage source chain-link converter. The method includes: detecting a failure of a device of one converter cell module; blocking a phase-leg including the failed position; discharging to zero a capacitor unit of the converter cell module including the failed position; and providing a current path for... Agent:
20140043874 - Circuit for controlling a latch mode of a pulse width modulation circuit and method thereof: A circuit for controlling a latch mode of a pulse width modulation circuit includes a D flip-flop, a voltage generation unit, a comparator, and a logic unit. The D flip-flop generates a switch control signal according to a latch enable signal. The voltage generation unit generates a discharge current, and... Agent: Leadtrend Technology Corp.
20140043875 - Off-line regulator and associated method: The present invention discloses an off-line regulator. The off-line regulator comprises a rectification circuit configured to rectify an AC line voltage into a rectified line voltage; a pass device coupled between the rectified line voltage and a first capacitor, the pass device is configured to be turned ON or OFF... Agent: Monolithic Power Systems, Inc.
20140043876 - Active feedback control integrated circuit applied to an alternating current/direct current converter and operation method thereof: An active feedback control integrated circuit applied to an alternating current/direct current converter includes a feedback pin, an operation unit, a control unit, and a controlled-current generation unit. The feedback pin is used for receiving a feedback current of an output feedback unit of the alternating current/direct current converter. The... Agent: Leadtrend Technology Corp.
20140043877 - Power factor correction converter: A power factor correction converter includes: a light load detection circuit configured to generate, if supplied power to a load is less than or equal to a predetermined value, a light load detection signal whose level corresponds to the supplied power; a target waveform generation circuit configured to generate, based... Agent: Panasonic Corporation
20140043878 - High-efficiency, low-power power supply circuit: A power supply circuit includes a rectifier, a charging circuit, and a storage capacitor. An AC signal is rectified by the rectifier thereby generating a rectified signal VR between a VR node and a GND node. The capacitor is coupled between an output voltage VO node and the GND node.... Agent: Ixys Corporation
20140043879 - 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 method for driving the same. An AC input of the power supply is connected to a rectification circuit. The power supply includes a power switch to which an input current passed through the rectification... Agent: Fairchild Korea Semiconductor Ltd.
20140043880 - Method and apparatus for determining a fault current portion in a differential current: When determining a fault current portion IF in a differential current idiff(t) measured by an inverter, an AC voltage uAC(t) applied to an AC output of the inverter is measured and a periodic reference function y(t) of alternating sign is generated as a function of the measured AC voltage uAC(t)... Agent:
20140043881 - Power converter with preemptive protection: Among many embodiments, a power conversion apparatus and a method for converting power are disclosed. The power conversion apparatus may include switching components configured to create an alternating current; a preemptive detector arranged and configured to provide, in advance of the alternating current reaching a zero-crossing, a control signal responsive... Agent:
20140043882 - 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 Utility Scale, Inc.02/06/2014 > 20 patent applications in 16 patent subcategories.
20140036544 - Combined low power isolated power supply with isolated data transfer: An apparatus for generating an isolated power supply voltage and an isolated data signal includes a first pulse generation circuit configured to generate a first pulse signal and a second pulse generation circuit configured to generate a second pulse signal based on an input pulse width modulation (PWM) signal. A... Agent:
20140036545 - Llc converter with dynamic gain transformation for wide input and output range: A resonant power converter system includes an output load and a rectifier stage that provides a DC output voltage to the output load from an AC intermediate voltage. The resonant power converter system also includes a resonant inverter stage that provides the AC intermediate voltage from a DC input voltage,... Agent: General Electric Corporation
20140036546 - Power supply apparatus, image forming apparatus, and integrated circuit: The power supply apparatus is configured to detect the output voltage of a piezoelectric transformer and controls the frequency of a pulse signal to drive the piezoelectric transformer based on the detected output voltage and a preset target voltage so as to perform feedback control of the output voltage of... Agent: Canon Kabushiki Kaisha
20140036547 - Power supply device: A power supply device includes a control unit performing PFM control for a switching element, a voltage detection unit detecting an output voltage of a converter, and a signal generation circuit. The control unit calculates a first control command value based on the output voltage, calculates a new first control... Agent: Tdk Corporation
20140036548 - Control circuit with fast dynamic response for power converters: A control circuit of a power converter is provided. It comprises a voltage detection circuit detecting a reflected signal for generating a voltage-loop signal. A current detection circuit detects a current of a transformer for generating a current-loop signal. An oscillator generates an oscillation signal in accordance with an output... Agent: System General Corp.
20140036550 - Control circuit of flyback power converter with bidirectional communicaiton channel: A control circuit of an isolated flyback power converter providing bidirectional communication. The control circuit includes a pulse width modulation circuit, an oscillator, a primary transceiver, a secondary error amplifier and a secondary transceiver. The primary transceiver generates a feedback signal and a pulse-position signal. The secondary error amplifier generates... Agent:
20140036549 - Switching power converter dynamic load detection: A secondary-side dynamic load detection system and method rapidly identifies when a dynamic load has been placed on the output (e.g., when an electronic device is re-connected to the switching power converter). Once a dynamic load condition has been detected by the secondary side detector, a dynamic load detection signal... Agent: Iwatt Inc.
20140036551 - Method and apparatus for on/off control of a power converter: A power converter includes an energy transfer element coupled between a power converter input and a power converter output. A power switch is coupled to the energy transfer element and the power converter input. A feedback sampling circuit is coupled to receive a feedback signal representative of the power converter... Agent: Power Integrations, Inc.
20140036552 - Semiconductor device provided with switching power supply device with intermittent oscillation control: A control circuit varies an intermittent oscillation frequency using a period signal. A period signal period signal frequency is set to a frequency lower than the intermittent oscillation frequency, or is set to be higher than the intermittent oscillation frequency and to a frequency other than integer multiples of the... Agent: Panasonic Corporation
20140036553 - Drive train comprising a doubly fed electric machine and a band stop filter connected between an inverter and the rotor of the machine: A drive train comprising an electric machine including a rotor and a stator, the stator being electrically connected to an alternating grid and having a stator frequency, and a bidirectional system for converting an alternating current into another alternating current. The conversion system is connected between the grid and the... Agent:
20140036554 - Power conversion with current sensing coupled through saturating element: An architecture for current-modulating power-handling circuits, such as power converters, where a small saturating inductance is used to obtain a pulse edge when the main current value crosses zero.... Agent: Ideal Power Inc.
20140036555 - Intelligent level transition systems and methods for transformerless uninterruptible power supply: Systems and methods are provided for controlling an uninterruptible power supply (UPS) to transition between three- or higher-level operation and two-level operation in a neutral-point-clamped (NPC) inverter. In an example, a UPS system includes an NPC inverter and a controller. The NPC inverter may supply power to a load. The... Agent: General Electric Company
20140036556 - Semiconductor device and switching regulator using the device: The semiconductor device according to the present invention has an n-channel output transistor wherein an input voltage is impressed on a drain, and a pulsed switching voltage that corresponds to a switching drive of the transistor is brought out from a source; a bootstrap circuit for generating a boost voltage... Agent: Rohm Co., Ltd.
20140036557 - Cascaded h-bridge (chb) inverter level shift pwm with rotation: Cascade H-Bridge inverters and carrier-based level shift pulse width modulation techniques are presented for generating inverter stage switching control signals, in which carrier waveform levels are selectively shifted to control THD and to mitigate power distribution imbalances within multilevel inverter elements using either complementary carrier or complementary reference modulation techniques.... Agent: Rockwell Automation Technologies, Inc.
20140036558 - Power controllers, power supplies and control methods therefor: Disclosure includes an exemplified power controller for controlling a power switch in a power supply. The power supply converts an input power source into an output power source. The exemplified power controller comprises a maximum frequency maker, a voltage detector, and a logic circuit. Based on dependence of a maximum... Agent:
20140036559 - Power supply monitoring circuit, ac/dc conversion apparatus and control method of power supply monitoring circuit: There is provided a power supply monitoring circuit including a holding part holding, every time a local maximum value of a power supply voltage which fluctuates is detected, the local maximum value as a local maximum voltage value, a power stop detector detecting whether or not supply of the power... Agent:
20140036560 - Circuit and method for measuring available power in a wireless power system: A resonant wireless power receiver that includes an electromagnetic resonator having one or more inductive elements that are arranged to form a receiver coil and a network of passive components arranged to form a matching network. A rectifier circuit converts ac power from the electromagnetic resonator to dc power. An... Agent: Mediatek Singapore Pte. Ltd.
20140036561 - Converter and semiconductor device: A converter includes: a bridge diode; an X capacitor provided upstream of the bridge diode; a smoothing capacitor provided downstream of the bridge diode; an AC shutoff detection circuit which outputs an AC shutoff detection signal when input AC voltage is shut off; and a discharging circuit which is connected... Agent: Panasonic Corporation
20140036562 - Method for actuating the switching transistors of a rectifier: The invention relates to a method for actuating the switching transistors of a rectifier which is provided for converting the phase voltages that are provided by a vehicle generator into a direct current voltage. Each switching transistor comprises a parasitic diode. An activation signal for initiating the conducting phase and... Agent:
20140036563 - Quadrature-corrected feedforward control apparatus and method for dc-ac power conversion: An apparatus and method for controlling the delivery of a pre-determined amount of power from a DC source to an AC grid includes an inverter and an inverter controller. The inverter includes an input converter, an energy storage capacitor, and an output converter. The inverter controller includes an input converter... Agent:Previous industry: Illumination
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