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Electric power conversion systems January recently filed with US Patent Office 01/12

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.
  
01/26/2012 > 21 patent applications in 15 patent subcategories. recently filed with US Patent Office

20120020117 - Electromechanical inductors and transformers: Devices and systems for power electronic circuits are provided. Embodiments of the present invention enable high density inductive energy storage by using electromechanical coupling between an electrically conducting inductive element and a mechanical resonator to passively store energy via both electromagnetic and mechanical mechanisms. A microelectromechanical inductor (MEMI) is provided... Agent: University Of Florida Research Foundation, Incorporated

20120020118 - Switching power supply apparatus: A switching power supply apparatus including: a switching DC-DC converter for receiving an input voltage; a current detecting unit for detecting a current from the DC-DC converter; an input voltage detecting unit for detecting the decrease or cutoff of the input voltage; an overcurrent limiting circuit for stopping the operation... Agent: Sony Corporation

20120020119 - Ac-dc converter and control circuit thereof: The invention discloses a control circuit for an AC-DC converter. The control circuit includes a power control circuit for comparing an input current sensing signal generated by sensing an input current of the AC-DC converter and a power level control input and in response thereto generating a frequency modulation control... Agent: Delta Electronics, Inc.

20120020121 - Current detection circuit and switching regulator circuit: A current detection circuit that includes a winding part including a core provided on a switching element and a lead wire which is wound around the core, and a signal generation unit configured to generate a signal with a value having correlation to a current passing through the switching element... Agent: Fujitsu Limited

20120020120 - Soft-switching control device and method of manufacturing the same: Soft-switching is performed to switch a switching state to an ON state by controlling a delay time of a timing at which a main switch switches to an ON state relative to a timing at which a sub-switch switches to an ON state. Controllability of soft-switching decreases as a result... Agent: Denso Corporation

20120020122 - Lossless commutation during operation of a power converter: A method for operating a DC-DC converter. The method comprises: matching, based on a turns ratio of a transformer of the DC-DC converter, a primary side capacitance of the DC-DC converter and a secondary side capacitance of the DC-DC converter to result in a matched capacitance; and operating the DC-DC... Agent: Enphase Energy, Inc.

20120020123 - Predictive synchronous rectification controller, switching power converter with predictive synchronous rectification controller and controlling method thereof: A predictive synchronous rectification controller for controlling at least one synchronous rectification switch is provided. The synchronous rectification controller has a ramp generator, a peak sampling unit, and an output control unit. The ramp generator receives a synchronous signal and generates a ramp signal accordingly. The peak sampling unit generates... Agent: Niko Semiconductor Co., Ltd.

20120020124 - Apparatus for detecting short-circuit of output diode in converter: An apparatus comprises: a voltage monitoring unit for monitoring input direct-current voltages of first and second converters whose output ends are connected in parallel to each other; and a judgment control unit for judging that an output diode of the first converter is short-circuited, when an input direct-current voltage monitored... Agent: Toyota Jidosha Kabushiki Kaisha

20120020126 - Control device of transformer coupling type booster: A control device of a transformer coupling type booster performs switching control of applying ON/OFF switching signals to the respective switching elements and alternately repeating, at a predetermined cycle, a voltage positive polarity period where an inter-terminal voltage of the low-voltage side winding and an inter-terminal voltage of a high-voltage... Agent: Komatsu Ltd.

20120020125 - Voltage regulator for fuel cell and method therefor: A voltage regulator for a fuel cell and a method therefor are disclosed. Inputs of converters are connected to the fuel cell in parallel and outputs of the converters are connected between a positive terminal and a negative terminal of a load in series. The output of the fuel cell... Agent: Chung-hsin Electric And Machinery Manufacturing Corp.

20120020127 - Power system with power saving function: A power system includes an electronic device having a host and a state generator and an adaptor. The host is capable of presenting a plurality of states and generating a plurality of state signals corresponding to the states, and the state generator is electrically connected to the host, receives the... Agent: Asustek Computer Inc.

20120020128 - Fuel cell system: A fuel cell system FCS includes a fuel cell FC, a motor ES4 connected to the fuel cell FC, an FC boost converter ES6 which raises the output voltage of the fuel cell FC to output the voltage to the motor ES4, an inverter ES3, a current sensor S2, and... Agent: Toyota Jidosha Kabushiki Kaisha

20120020129 - 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.

20120020131 - Power apparatus and method of supplying power: The present invention provides a power apparatus, which includes a switch unit, a bleeder resistor, a filter, a rectifier, a power factor corrector, an output capacitor, a rectifying diode, a surge absorber, a main power supply, and a standby power supply. Moreover, the AC power charges to the output capacitor... Agent: Lien Chang Electronic Enterprise Co., Ltd.

20120020132 - Power conversion system with zero-voltage start-up mechanism, and zero-voltage start-up device: A power conversion system with zero-voltage start-up mechanism and a zero-voltage start-up device are disclosed. The system includes a power conversion circuit, a power factor correction unit, a storage capacitor, a storage switching unit, and a zero-voltage detection module. The storage switching unit is serially connected with the storage capacitor,... Agent: Lien Chang Electronic Enterprise Co., Ltd.

20120020130 - Series power module: A power module includes a switch portion operative to switch an alternating current (A/C) voltage, a rectifier portion operative to receive the switched A/C voltage, rectify the switched A/C voltage, and output a direct current (D/C) voltage, a power control module operative to receive the D/C voltage and to charge... Agent: General Electric Company

20120020133 - Switch control device, power supply device comprising the same and switch control method: Provided are a switch control device and a switch control method. The present invention generates power voltage required to operate the switch control device by using full-wave current rectification voltage generated by rectifying an AC input and detects a zero cross-point when a full-wave rectification voltage is zero voltage by... Agent:

20120020134 - Switch control device, power supply device comprising the same and switch control method: The present invention generates power voltage required to operate the switch control device by using full-wave current rectification voltage generated by rectifying an AC input and detects a zero cross-point when a full-wave rectification voltage is zero voltage by using the edge of power voltage. The present invention generates a... Agent:

20120020135 - Ac/dc power conversion methods and apparatus: An AC/DC converter that converts an AC input voltage Vin to a DC output voltage comprises an inductor, a capacitor selectively coupled to the inductor, a plurality of switches, and a controller. The controller configures the plurality of switches, inductor, and capacitor to operate as a buck converter during times... Agent:

20120020136 - Electric power conversion system: A power conversion system according to the present invention includes: an inverter circuit unit that converts a direct current power supplied from a direct current source into an alternating current power, the direct current power being supplied to the inverter circuit through a contactor that conducts and interrupts the direct... Agent: Hitachi Automotive Systems. Ltd.

20120020137 - Power conversion device: A single phase three-level power converter can include a first half bridge and a second half bridge. A half bridge operation is implemented in either the first half bridge or second half bridge when outputting a single phase alternating current voltage having an amplitude a half or less than that... Agent: Fuji Electric Co., Ltd.

  
01/19/2012 > 18 patent applications in 17 patent subcategories. recently filed with US Patent Office

20120014139 - Power converting apparatus: In a power converting apparatus which converts AC power into DC power, an inverter circuit including at least one series-connected single-phase inverter is connected in a downstream of a stage in which an AC input is rectified in series therewith. In the downstream stage of the inverter circuit, there are... Agent: Mitsubishi Electric Corporation

20120014138 - Pulse width modulated resonant power conversion: A power converter including a resonant circuit is controlled by pulse width modulation (PWM) of a switching circuit to control current in the resonant circuit near the frequency of the resonant circuit (a null-immittance criterion) in order to control current and voltage at the output of the resonant circuit. Further... Agent:

20120014140 - Systems and methods for reducing transient voltage spikes in matrix converters: Systems and methods are provided for delivering energy using an energy conversion module that includes one or more switching elements. An exemplary electrical system comprises a DC interface, an AC interface, an isolation module, a first conversion module between the DC interface and the isolation module, and a second conversion... Agent: Gm Global Technology Operations, Inc.

20120014141 - Reset voltage circuit for a forward power converter: A reset voltage circuit for a forward power converter includes a reset capacitor and a memory capacitor. The reset capacitor is to be coupled to recycle energy from a primary winding of a transformer to an input bulk capacitor during a resetting of the transformer. The memory capacitor is to... Agent: Power Integrations, Inc.

20120014142 - Power conversion apparatus for correcting power factor: A power conversion apparatus for correcting power factor, which converts an input voltage to an output voltage, comprises: an inductive component, a unidirectional conducting component, a switch, an energy storage component, a capacitive component, and an output circuit. The unidirectional conducting component connects to the inductive component and the switch... Agent: Welland Industrial Co., Ltd.

20120014143 - Inverter filter including differential mode and common mode, and system including the same: An inverter filter is for a plurality of phases. The inverter filter includes a node; a differential mode filter including for each of the phases a first terminal, a second terminal, an inductor electrically connected between the first terminal and the second terminal, and first capacitor electrically connected between the... Agent:

20120014144 - Power supplying apparatus: A power supplying apparatus includes a rectifier and a first electromagnetic interference (EMI) filter. The rectifier receives and rectifies an alternating current (AC) input power for generating a direct current (DC) power. The first EMI filter receives the DC power through a first power input terminal and a first reference... Agent:

20120014145 - Startup circuit: A startup circuit is installed in a switching power source apparatus. The startup circuit is configured to start up a controller with the use of a rectified voltage at startup of an AC power source and includes a detector (ZD3, Q4, Q6) to detect if the rectified voltage is equal... Agent: Sanken Electric Co., Ltd.

20120014146 - Power-dependant mains under-voltage protection: In converters such as flyback converters, this brown-out protection can be implemented by comparing the actual peak voltage of the mains voltage with a control signal that indicates the power level, such as the current through the optocoupler in the feedback loop. In other embodiments, where the SMPS operates only... Agent: Nxp B.v.

20120014147 - 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.

20120014148 - Adaptive on-time control for power factor correction stage light load efficiency: Light load efficiency of a power factor correction circuit is improved by adaptive on-time control and providing for selection between a continuous conduction mode and a discontinuous conduction mode wherein the discontinuous conduction mode increases time between switching pulses controlling connection of a cyclically varying voltage to a filter/inductor that... Agent:

20120014149 - Power conversion apparatus and method: According to one embodiment a power conversion apparatus includes a first switch, a second switch, and a pulse generator. The first switch is connected at both ends of an AC power supply through an inductor and capacitor connected in series. The second switch is connected at both ends of the... Agent: Toshiba Tec Kabushiki Kaisha

20120014150 - Power factor correction efficiency improvement circuit, a converter employing the circuit and a method of manufacturing a converter: The disclosure provides a power factor correcting (PFC) circuit, a power supply and a method of manufacturing a power converter. In one embodiment, the PFC circuit has a positive input terminal, an output terminal and a ground terminal and includes: (1) a power factor inductor coupled in series between the... Agent: Lineage Power Corporation

20120014151 - Power conversion with added pseudo-phase: Methods and systems for power conversion. An energy storage capacitor is contained within an H-bridge subcircuit which allows the capacitor to be connected to the link inductor of a Universal Power Converter with reversible polarity. This provides a “pseudo-phase” drive capability which expands the capabilities of the converter to compensate... Agent: Ideal Power Converters, Inc.

20120014152 - Method for controlling switching power unit: There is provided a method for controlling a switching power unit that converts AC input voltages of an AC source into a DC voltages while improving a power-factor of the AC input voltages, the switching power unit comprising an AC/DC converter circuit that is composed of a power-factor correction unit... Agent: Minebea Co., Ltd.

20120014153 - Supply circuit: e

20120014154 - Motor drive cooling duct system and method: The present invention relates generally to tuning the flow of cooling air across converter and inverter heat sinks in a motor drive system. More specifically, present techniques relate to motor drive duct systems having parallel cooling air duct channels dedicated to providing cooling air for a converter heat sink and... Agent: Rockwell Automation Technologies, Inc.

20120014155 - Semiconductor device and power supply device using the same: A semiconductor device capable of reducing an inductance is provided. In the semiconductor device in which a rectification MOSFET, a commutation MOSFET, and a driving IC that drives these MOSFETs are mounted on one package, the rectification MOSFET, a metal plate, and the commutation MOSFET are laminated. A current of... Agent:

  
01/12/2012 > 18 patent applications in 13 patent subcategories. recently filed with US Patent Office

20120008343 - High-voltage startup method and power management apparatus: A high-voltage device provides a constant current drained from a high voltage source to charge a filter capacitor, where a voltage level of the higher voltage source is higher than 90 volts. When the operation voltage of the filter capacitor exceeds a first predetermined value, the charging of the filter... Agent:

20120008342 - Power conversion apparatus and over current protection method thereof: A power conversion apparatus and an over current protection (OCP) method thereof are provided. The OCP method includes generating a pulse-width-modulation (PWM) signal according to a loading status of an electronic device, so as to switch a power switch in the power conversion apparatus and thus making the power conversion... Agent: Power Forest Technology Corporation

20120008344 - Driver for driving power switch element: A driver for driving a driving element includes: a signal source, for providing a square signal; a first modulation circuit, for providing on-pulses and off-pulses according to edges of the square signal; a transformer for coupling output signals of the first modulation circuit to a secondary winding of the transformer... Agent:

20120008345 - Apparatus and method for output voltage calibration of a primary feedback flyback power module: An apparatus and method for output voltage calibration of a primary feedback flyback power module extract the difference between the output voltage of the power module and a target value, and according thereto, calibrate a reference voltage which is used in regulation of the output voltage, to thereby calibrate the... Agent: Richtek Technology Corp.

20120008346 - Semiconductor integrated circuit and switching power supply system: A control circuit can be provided with a comparator detecting a turning-off of a semiconductor switch from a voltage generated in an auxiliary winding of a transformer and inputted to a zero current detecting terminal, a timer outputting a signal after a specified length of time from the time at... Agent: Fuji Electric Co., Ltd.

20120008347 - Method for operating a dc/dc converter circuit configuration and dc/dc converter circuit configuration: A DC/DC converter circuit configuration contains a rectifier configuration, an inductance and at least one circuit breaker for switching the inductance on its input side. When controlling the circuit configuration, an off time of the circuit breaker is variably changed on the basis of the output power of the circuit... Agent: Diehl Ako Stiftung & Co. Kg

20120008348 - Communication within a power inverter using transformer voltage frequency: A power inverter may include a transformer serving as an isolation barrier. The power inverter may include a first controller on one side of the isolation barrier. The first controller may encode the frequency of an input voltage of the transformer with one or more operating conditions of a direct... Agent: Solarbridge Technologies

20120008349 - Power inverter systems with high-accuracy reference signal generation and associated methods of control: Power converter systems with high accuracy signal generation and associated methods are disclosed herein. In one embodiment, a method for controlling an inverter coupled to a grid includes receiving data representing a voltage signal of the grid, analyzing the received data in frequency domain, and extracting a fundamental frequency component... Agent:

20120008350 - Method of controlling a pfc stage operating in boundary conduction mode, a pfc stage, and an smps: Consistent with an example embodiment, there is a control method which reduces the steps: instead of a constant on-time for the switch, the duration of the on-time is increased each time an additional valley to be skipped. The predetermined increase may be either a fixed fractional increase or a further... Agent: Nxp B.v.

20120008351 - Voltage-dividing power factor correction circuit, voltage-dividing power factor correction apparatus and voltage-dividing power factor correction method: A circuit include: a first power factor correction circuit that forces current produced by the positive AC voltage to be in phase with the positive AC voltage so that a power factor of electric power is improved; a second power factor correction circuit that forces current produced by the negative... Agent: Fujitsu Limited

20120008352 - Method and apparatus of providing a biased current limit for limiting maximum output power of power converters: A biased current-limit circuit for limiting a maximum output power of a power converter includes an oscillator for generating a pulse signal and an oscillation signal. A waveform generator generates a waveform signal in response to the oscillation signal. A sample-hold circuit is used to sample the waveform signal to... Agent: System General Corp.

20120008353 - 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.

20120008354 - Discharge loop for power supply circuit and active control circuit thereof: Provided is a discharge loop for power supply and the active control circuit thereof for actively regulating the discharging operation of the discharge loop of the power supply. The inventive active control circuit is able to disallow the current to flow through the bleeder resistor of the discharge loop to... Agent: Delta Electronics, Inc.

20120008355 - Passive three phase input current harmonic reduction and power factor correction circuit for power supplies: A harmonic input current reduction and power factor correction circuit for three phase, power supplies. The circuit includes passive elements including a series inductance and capacitor connected between each AC line of a three phase voltage source, and each input phase of the uncorrected power supply. The inductance and capacitor... Agent: Switching Power, Inc.

20120008357 - Capacitor module, power converter, vehicle-mounted electrical-mechanical system: A capacitor module in which the structure of a connecting portion is highly resistant against vibration and has a low inductance. The capacitor module includes a plurality of capacitors and a laminate made up of a first wide conductor and a second wide conductor joined in a layered form with... Agent: Hitachi, Ltd.

20120008356 - Current-fed converter: A converter circuit includes first and second input terminals for receiving input current from a current source, a first capacitor connected between the first and second input terminals, a second capacitor having a first terminal of which is connected to the second input terminal and a second terminal which forms... Agent: Abb Oy

20120008358 - Electric circuit for converting direct current into alternating current: Electric circuit for converting direct into alternating current specially designed for photovoltaic systems connected to the electrical grid without a transformer, and enabling the earthing of one of the input terminals (2) of the photovoltaic generator, thereby working with a wide range of input voltages and having a high efficiency.... Agent: Ingeteam Energy, S.a.

20120008359 - Asymmetric zero-voltage switching full-bridge power converters: Disclosed are full-bridge power converters providing DC output power at increased conversion efficiencies, and methods of operating full-bridge power converters providing DC output power at increased conversion efficiencies. In disclosed embodiments, the switches of the full-bridge are operated to reduce conduction losses and to provide for zero-voltage switching.... Agent: Intersil Americas Inc.

  
01/05/2012 > 9 patent applications in 8 patent subcategories. recently filed with US Patent Office

20120002446 - Primary-side power control for inductive power transfer: A method is provided for controlling the output voltage of a pickup in an inductive power transfer (IPT) system without any additional form of communications for feedback from the pickup to the power supply. The method comprising the steps of deriving an estimate of the output voltage of the pickup... Agent: Auckland Uniservices Limited

20120002447 - Gate drive controller circuit with anti-saturation circuit and power up circuit therefor: A high side isolated gate drive controller circuit is presented with an on-time limiting circuit to prevent isolation transformer saturation as well as a universal power up circuit adaptable to power the driver with constant voltage for different input voltage levels.... Agent: General Electric Company

20120002448 - Method and apparatus for on/off control of a power converter: A power converter is disclosed. An example 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... Agent: Power Integrations, Inc.

20120002449 - Primary side voltage control in flyback converter: In one embodiment, an apparatus includes a sampling component. The sampling component receives a first voltage signal on a primary side of a transformer and monitors the first voltage signal to determine a voltage sampling time. The determined voltage sampling time is when the first voltage signal is used to... Agent:

20120002450 - Bidirectional inverter for conversion between a direct current source and an alternating current grid: A bidirectional inverter is disclosed, the inverter including DC terminals and being connectable to a grid via grid AC terminals. The inverter includes a first subinverter and a second subinverter, both subinverters being connected in parallel to the DC terminals, and being connected in parallel to the grid AC terminals... Agent: Sma Solar Technology Ag

20120002451 - Method and apparatus for integrated cable drop compensation of a power converter: An integrated circuit controller for a power converter to be coupled to a distribution network is disclosed. An example integrated circuit controller according to aspects of the present invention includes a switching control circuit that outputs a drive signal to control switching of a switch to regulate an output of... Agent: Power Integrations, Inc.

20120002452 - Compact inverter: A method of making a compact power inverter is disclosed. Steps include: providing a plurality of transistors, a main circuit board, a transformer, an input control circuit board; an output control circuit board; and optionally, casing; aligning transistors in the plurality of transistors in rows on the top side of... Agent:

20120002453 - Controller apparatus for controlling a multiphase multilevel voltage source inverter and a method thereof: The present invention provides an apparatus for controlling a multiphase multilevel voltage source inverter. The apparatus includes a signal-generating unit and a converter. The signal-generating unit responds to an input signal to produce a switching strategy control signal and a duration timing control signal corresponding to the switching strategy control... Agent: National Chiao Tung University

20120002454 - Three-level inverter, power conditioner, and power generating system: A three-level inverter includes a set of series-connected capacitors connected in parallel to a direct-current power supply; two arms connected in parallel to an output of the direct-current power supply and each having an alternating-current output terminal; and a control section having a neutral voltage controller determining a three-phase voltage... Agent: Kabushiki Kaisha Yaskawa Denki

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