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Electric power conversion systems June invention type 06/09

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.
  
06/25/2009 > patent applications in patent subcategories. invention type

20090161389 - Systems and methods for precharging boost converters in dc to dc power converters: A method and apparatus for precharging a DC to DC power converter system is provided. The system includes a boost circuit for generating a boosted output voltage from an input voltage. The input voltage is monitored. A predetermined current limit is compared to a current in the boost circuit, and... Agent: Ingrassia Fisher & Lorenz, P.C. (gm)

20090161390 - Synchronous rectification control circuit assembly: A synchronous rectification control circuit assembly includes a first transformer, a reference voltage generator, a first PWM control signal generating circuit, a second PWM control signal generating circuit, a first synchronous rectification circuit, and a second synchronous rectification circuit. When the output voltage rises, the conduction time of the first... Agent: Sinorica, LLC

20090161391 - Double-ended isolated dc-dc converter: In a double-ended isolated DC-DC converter, by using a main transformer and first and second pulse transformers, a first power switch of a primary side circuit and a first synchronous rectifier of a secondary side circuit are driven with complementary timing, and a second power switch of the primary side... Agent: Murata Manufacturing Company, Ltd. C/o Keating & Bennett, LLP

20090161392 - Dc component elimination at output voltage of pwm inverters: A control system for a PWM inverter may reduce a DC component of an output of the inverter. An output voltage signal may be attenuated with a low-pass filter to produce a signal with a high DC content. A duty cycle of an output of the low pass filter may... Agent: Honeywell International Inc.

20090161393 - Pwm inverter: There is provided a PWM inverter capable of preventing a phase error from occurring in generating a PWM signal even in the case where a carrier wave frequency is not sufficiently higher than a signal wave frequency. A PWM signal generating section (2) includes a phase adjusting section (11) configured... Agent: Sughrue-265550

20090161394 - Electronic device and power supply unit thereof: An exemplary electronic device includes a controller, a first convertor, a second convertor, and a switching unit. The first convertor is configured for receiving a first voltage from an external power supply and converting the first voltage into a second voltage. The controller is coupled to the first convertor for... Agent: PCe Industry, Inc. Att. Steven Reiss

20090161395 - High output current split package a/c adapter: A power adapter, including an AC input terminal, an AC-DC power converter, a DC-DC power converter, and an output terminal, wherein the AC-DC power converter and the DC-DC power converter are separate components, and wherein the power AC input terminal, AC-DC power converter, DC-DC power converter and the output terminal... Agent: Beusse Wolter Sanks Mora & Maire, P. A.

20090161396 - Synchronous rectifier control device and forward synchronous rectifier circuit: Disclosed are a synchronous rectifier control device and a forward synchronous rectifier circuit. The synchronous rectifier control device is coupled with the secondary side of the forward synchronous rectifier circuit, comprising a condition detecting unit, a reference time circuit and a synchronous signal generator. The condition detecting unit receives at... Agent: Rosenberg, Klein & Lee

20090161397 - Computer power supply: A power supply for a computer includes a transformer, a rectifier, a pulse width modulation (PWM) controller, a relay, a power switch, and a battery. The PWM controller includes a voltage terminal and a pulse terminal. The relay includes a switch and an inductance coil. An alternating current (AC) power... Agent: PCe Industry, Inc. Att. Steven Reiss

20090161398 - Method of controlling a three level converter: A system and method are disclosed for controlling an inverter to provide an alternating inverter voltage to a load for a transition in which a change in active power (P) and/or reactive power (Q) within a transition time (Ttr) is carried out. The method includes converting a direct current voltage... Agent: Buchanan, Ingersoll & Rooney PC

  
06/18/2009 > patent applications in patent subcategories. invention type

20090154199 - Burst frequency resonant inverter: A high frequency resonant apparatus is described that includes a closed loop resonant series circuit including a capacitor, an inductor, a load, and a switching device with an anti-parallel diode. An energy source is coupled to the closed loop series circuit. The high frequency resonant apparatus also includes a controller... Agent: Blakely Sokoloff Taylor & Zafman LLP

20090154200 - Controller circuit and system having such a controller circuit: A controller circuit is specified, having a step-up controller, a resonant converter connected downstream of the step-up controller on the output side, a transformer, a rectifier, which rectifier is connected to the secondary winding of the transformer on the input side, and a CLL resonant circuit connected to the resonant... Agent: Buchanan, Ingersoll & Rooney PC

20090154201 - Alternating voltage generator equipped with a current limiting device: The invention relates to an alternating voltage generator (10) comprising a direct voltage source (20) that supplies a power bus, a bus capacitor (11) connected to the power bus, an inverter module (30) supplied by the power bus and equipped with several normally-on JFET power transistors (31a, 31b) in order... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090154202 - Backlight inverter and method of driving same: A backlight inverter is provided which includes at least one inverter transformer and to which a plurality of cold cathode fluorescent lamps are connected, wherein a plurality of primary windings of the inverter transformer are connected to each other either in series or in parallel, a resonance circuit including a... Agent: Oliff & Berridge, PLC

20090154203 - Ac to dc power supply having zero low frequency harmonic contents in 3-phase power-factor-corrected output ripple: An AC-DC power supply circuit utilizing an output stage configuration designed to achieve no output ripple at the power line frequency. To eliminate the ripple formed, each separate processing output stage corresponding to a respective ac voltage source phase which provides a 120 Hz ripple, is stacked, in a series... Agent: Scully Scott Murphy & Presser, PC

20090154204 - Reverse biasing active snubber: The present invention provides a transient suppression circuit for use with a rectifier coupled to a transformer. In one embodiment, the transient suppression circuit includes a triggering section configured to provide a timing signal corresponding to a dead time of the rectifier. Additionally, the transient suppression circuit also includes a... Agent: Hitt Gaines P.C.

20090154205 - Snubber capacitor resetting in a dc-to-dc converter: A DC-to-DC converter and associated methods are provided for controlling the discharge of snubber capacitances during a light/no load buck mode of operation. An operating method for a DC-to-DC converter detects conditions corresponding to a light/no load buck mode of operation, and, in response to the detection of that mode,... Agent: Ingrassia Fisher & Lorenz, P.C. (gm)

20090154206 - Circuit and associated method for reducing power consumption in an a power transformer: A method and circuit is provided for reducing power consumption in a power transformer, typically incorporated into an electrical or electronic device such as a consumer device. In an embodiment, a detection/isolation circuit is coupled to an input of a power transformer/rectifier via a switching device. The switching device can... Agent: Kathy Manke Avago Technologies Limited

20090154207 - Negative voltage generating circuit: A negative voltage generating circuit includes a pulse generator U1, a switch, a resistor, a first capacitor, a first diode, a second diode, and a second capacitor. The pulse generator includes a positive voltage input pin coupled to a power supply, an oscillating output pin, and a negative voltage input... Agent: PCe Industry, Inc. Att. Steven Reiss

20090154208 - Power supply device: A power supply device with power conversion capabilities is disclosed. The power supply device comprises an input module, a power converter, and an output module. The input module is used for receiving an alternating current power. The power converter is coupled to the input module for converting the alternating current... Agent: Muncy, Geissler, Olds & Lowe, PLLC

20090154209 - 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: Antonelli, Terry, Stout & Kraus, LLP

20090154210 - Bidirectional field-effect transistor and matrix converter: The bi-directional field effect transistor includes: a semiconductor substrate 1; a gate region which is arranged on the semiconductor substrate 1, with a channel parallel to a principal surface of the substrate 1 and a gate electrode 13a for controlling conductance of the channel; a first region which is arranged... Agent: Fish & Richardson P.C.

  
06/11/2009 > patent applications in patent subcategories. invention type

20090147540 - Method for operating a converter circuit: A method and arrangement are disclosed for operating a converter circuit. Such a converter circuit has a converter unit having a multiplicity of drivable power semiconductor switches. The converter unit is connected to an electrical AC voltage supply system on the AC voltage side. The drivable power semiconductor switches are... Agent: Buchanan, Ingersoll & Rooney PC

20090147541 - Complex inductor and power supply unit: A complex inductor according to the present invention changes its magnetic coupling polarity according to currents flowing its two inductors. The complex inductor includes a first magnetic member, around which first and third windings are formed, and a second magnetic member, around which second and fourth windings are formed. A... Agent: Antonelli, Terry, Stout & Kraus, LLP

20090147543 - Dc-dc converter for display apparatus: A DC-DC converter, which supplies a drive power to a display apparatus, includes a plurality of insulated transformers, a resonance capacitor, and a resonance coil. Primary coils of the plurality of insulated transformers, the resonance capacitor, and the resonance coil are connected in series to form a current resonance circuit,... Agent: Antonelli, Terry, Stout & Kraus, LLP

20090147542 - Systems and methods for driving a transistor: This disclosure relates to monitoring and controlling a voltage characteristic of a Drain Extended Metal Oxide Semiconductor (DeMOS) transistor.... Agent: Lee & Hayes, PLLC

20090147545 - History-independent noise-immune modulated transformer-coupled gate control signaling method and apparatus: A history-independent and noise-immune modulated transformer-coupled gate control signaling method and apparatus provides robust design characteristics in switching power circuits having a transformer-coupled gate drive. A modulated control signal at a rate substantially higher than the switching circuit gate control rate is provided from the controller circuit to a demodulator... Agent: Mitch Harris, LLC - Cirrus

20090147544 - Modulated transformer-coupled gate control signaling method and apparatus: A modulated transformer-coupled gate control signaling method and apparatus provides reduction of circuit complexity and robust design characteristics in switching power circuits having a transformer-coupled gate drive. A modulated control signal at a rate substantially higher than the switching circuit gate control rate is provided from the controller circuit to... Agent: Mitch Harris, LLC - Cirrus

20090147547 - Energy transfer device and energy transfer control semiconductor device: The present invention includes a turn-off signal modulating circuit that periodically varies a turn-off timing of a switching element 2 at a preset modulation time after a current detection by a drain current detecting circuit 15, and by modulating the peak of a current flowing through the switching element 2,... Agent: Steptoe & Johnson LLP

20090147546 - Isolated voltage converter with feedback on the primary winding and passive snubber network, and corresponding control method: An embodiment of a voltage converter, provided with: a voltage transformer having a primary winding receiving an input voltage, a secondary winding supplying an output voltage, and an auxiliary winding supplying a feedback voltage correlated to the output voltage; a main switch, connected to the primary winding; a control circuit,... Agent: Graybeal Jackson LLP

20090147548 - Control circuit for adjusting leading edge blanking time and power converting system using the same control circuit: A control circuit for adjusting leading edge blanking time is disclosed. The control circuit is applied to a power converting system. The control circuit adjusts a leading edge blanking time according to a feedback signal relative to a load connected to the output terminal of the power converting system. An... Agent: North America Intellectual Property Corporation

20090147549 - Power converters: The present invention provides a power converter that can be used to interface a generator (4) that provides variable voltage at variable frequency to a supply network operating at nominally fixed voltage and nominally fixed frequency and including features that allow the power converter to remain connected to the supply... Agent: Kirschstein, Israel, Schiffmiller & Pieroni, P.C.

20090147550 - Full digital soft-start circuit and power supply system using the same: A full digital soft-start circuit adapted for a power supply system is provided. The full digital soft-start circuit includes a ring oscillator, a pulse generator, a counter, and a multiplexer. The ring oscillator generates a plurality of clock signals which are different in phase, while equivalent in duty cycle and... Agent: J C Patents, Inc.

20090147551 - Pilot control of a voltage source converter: An apparatus for controlling a converter has an ignition unit connected to power semiconductors in the converter and provides control signals for actuating the semiconductors. The apparatus has a control unit whose input is connected to measuring sensors providing actual values and whose output side is connected to the ignition... Agent: Lerner Greenberg Stemer LLP

20090147552 - Systems and methods involving balancing currents for thyristors: An exemplary embodiment includes a method for balancing thyristor bridge circuits, the method comprising, determining currents of thyristors in a first leg of thyristors of a thyristor bridge circuit, determining a first set of gate firing times for the thyristors in the first leg of thyristors responsive to determining the... Agent: Cantor Colburn, LLP

20090147553 - Dc power supply for varying output voltage according to load current variation: A direct current (DC) power supply for varying an output voltage according to a load current variation is disclosed. The DC power supply includes an alternating current(AC)/DC conversion unit converting commercial AC power into DC power, a DC/DC conversion unit converting a voltage level of the DC power and outputting... Agent: Lowe Hauptman Ham & Berner, LLP

20090147554 - Parallel connected inverters: A distributed power system wherein a plurality of power converters are connected in parallel and share the power conversion load according to a prescribed function, but each power converter autonomously determines its share of power conversion. Each power converter operates according to its own power conversion formula/function, such that overall... Agent: Nixon Peabody, LLP

20090147555 - Systems and methods involving thyristors: An exemplary embodiment includes a system for measuring and controlling a thyristor comprising a thyristor, a Rowgoski coil in operable communication therewith the thyristor, and a processor operative to receive signals from the Rowgoski coil, determine a direct current value of the thyristor, and control the thyristor.... Agent: Cantor Colburn, LLP

  
06/04/2009 > patent applications in patent subcategories. invention type

20090141518 - Circuit and method for rectifying and regulating voltages: A circuit having a first input and a second input configured to apply an alternating voltage, a first output and a second output configured to supply a rectified and regulated voltage, a rectifier bridge circuit having a current return circuit, a third transistor and a fourth transistor, and a controller... Agent: Dickstein Shapiro LLP

20090141519 - Dc/dc converter: Provided is a DC/DC converter including a power supply unit that includes a transformer having one primary side and a plurality of secondary sides and outputs a plurality of driving voltages for driving a load; and a constant current converting unit that is connected to one secondary side and a... Agent: Lowe Hauptman Ham & Berner, LLP

20090141520 - Isolated voltage converter with feedback on the primary winding, and corresponding method for controlling the output voltage: An embodiment of a voltage converter, designed to convert an input voltage into a regulated output voltage, having: a voltage transformer having a primary winding receiving the input voltage, a secondary winding supplying the output voltage (Vout), and an auxiliary winding supplying a feedback signal correlated to the output voltage;... Agent: Graybeal Jackson LLP

20090141521 - Method and apparatus of providing synchronous regulation for offline power converter: A synchronous regulation circuit is provided to improve the efficiency for an offline power converter. A secondary-side switching circuit is coupled to the output of the power converter to generate a synchronous signal and a pulse signal in response to an oscillation signal and a feedback signal. An isolation device... Agent: Rosenberg, Klein & Lee

20090141522 - System and method for protection during inverter shutdown in distributed power installations: A protection method in a distributed power system including of DC power sources and multiple power modules which include inputs coupled to the DC power sources. The power modules include outputs coupled in series with one or more other power modules to form a serial string. An inverter is coupled... Agent: Nixon Peabody, LLP

20090141524 - Control device for power factor correction device in forced switching power supplies: Herein described is a control device of a device for the correction of the power factor in forced switching power supplies; said device for the correction of the power factor comprises a converter and said control device is coupled to the converter to obtain from an alternating input line voltage... Agent: Seed Intellectual Property Law Group PLLC

20090141523 - Switching control circuit and ac/dc converter using the same: A switching control circuit for an AC/DC converter stops the switching of a switching device in a low-phase angle range of an AC power supply to prevent an improper recovery operation after a brownout is detected.... Agent: Rabin & Berdo, PC

20090141525 - Power source device: A power source device includes an input terminal, a first switching element connected to the input terminal, a second switching element connected to the first switching element, a transformer having a primary coil connected to a connecting node between the first and second switching elements, a low-pass filter including a... Agent: Ratnerprestia

20090141526 - Harmonics related synchronization for switching regulators: Disclosed is a system and method for synchronizing switching regulators in an electronic system so that switching interference from the regulators may be kept from a given spectral region of interest. The system does this by selecting a master clock frequency such that each of the switching frequencies corresponding to... Agent: Honeywell International Inc.

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