Electric power conversion systems inventions 05/07

20070121348 - Converter circuit with two converter elements: A converter circuit having a first and a second converter element is specified, with each converter element having a DC voltage circuit and in each case one converter element phase (u1, v1, w1) of the first converter element being connected to a respective converter element phase (u2, v2, w2) of... Agent: Buchanan, Ingersoll & Rooney PC

20070121350 - Dc converter with independently controlled outputs: A DC converter comprises a single primary circuit which is coupled to each of a plurality of output circuits in respective time periods, the coupling being provided by switching in the output circuits. Each output circuit produces a respective output voltage and a respective feedback signal which is coupled as... Agent: Smart & Biggar P.o. Box 2999, Station D

20070121349 - Transformer-isolated flyback converters and methods for regulating output current thereof: A system and method for delivering regulated power and current to an output load has a flyback transformer having a primary winding and a secondary winding. The secondary winding delivers stored energy to the output load. An oscillator circuit is provided for generating a periodical signal. A switching circuit is... Agent: Weiss & Moy PC

20070121351 - Dc-dc flyback converter having a synchronous rectification self-driven circuit: A DC-DC flyback converter, includes a three-winding transformer; a primary power circuit having a first MOSFET connected to a first winding of the transformer; a secondary power circuit connected to a second winding of the transformer terminals; and a self-driven circuit connected to a third winding of the transformer. The... Agent: Ostrolenk Faber Gerb & Soffen

20070121352 - Switching control circuit having a valley voltage detector to achieve soft switching for a resonant power converter: The present invention provides a switching control circuit having a valley voltage detector to achieve the soft switching and improve the efficiency of a power converter. The switching control circuit includes a control circuit coupled to the feedback signal to generate a switching signal. Through an output circuit, the switching... Agent: Rosenberg, Klein & Lee

20070121353 - Power converter system and method: A power system for providing an output power to a load is provided. The system comprises a generator configured to generate an alternating current input power and an power converter system coupled to the generator and configured to generate an output power and provide the output power to the load... Agent: General Electric Company Global Research

20070121354 - 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 network... Agent: Kirschstein, Ottinger, Israel & Schiffmiller, P.C.

20070121355 - Cmos full wave rectifier: A rectifier circuit includes first and second input terminals for receiving a rectangular wave input voltage, and first and second output terminals for providing a rectified dc output voltage. A first switch is coupled between the first input terminal and a first node, the first node being coupled to the... Agent: Bromberg & Sunstein LLP

20070121356 - Electronic apparatus and power circuit: An electronic apparatus having a load including: a power supply unit supplying a driving voltage to the load; an inverter unit switching the driving voltage; and a control voltage supply unit outputting a first control voltage lower than a reference voltage applied to one terminal of the inverter unit, and... Agent: Staas & Halsey LLP

20070121357 - Apparatus for a power supply with brownout protection and the protecting method for the same: An apparatus for a power supply with brownout protection and the method thereof are proposed. As a brownout condition occurs, the apparatus informs at least one microprocessor to process the shutdown process timely. The apparatus includes a power factor correction (PFC) circuit, and a bus capacitor generating a bus voltage... Agent: Rosenberg, Klein & Lee

20070115696 - Control circuit for current and voltage control in a switching power supply: The present invention refers to a circuit for current and voltage control in a switching power supply controlled on the primary side, comprising a transformer with a primary-sided and a secondary-sided main winding, wherein energy pulses are transmitted from the primary side to the secondary side. Furthermore, a primary-sided switch... Agent: Michael Best & Friedrich, LLP

20070115697 - Method of controlling dc-to-dc converter whereby switching control sequence applied to switching elements suppresses voltage surges at timings of switch-off of switching elements: In a DC-to-DC converter which can convert DC power supplied to a first voltage system circuit, having first and second switching elements, to DC power at a boosted voltage, produced from a second voltage system circuit having third and fourth switching elements, with conversion performed based on control of a... Agent: Nixon & Vanderhye, PC

20070115695 - Power supply with low standby loss: The present invention discloses a power supply device with low standby loss. The power supply device comprises a main power converter and an auxiliary power converter. The main power converter comprises a bulk capacitor. The main power converter connects parallelly with the auxiliary power converter. When the power supply device... Agent: Birch Stewart Kolasch & Birch

20070115698 - Control circuit for isolated forward dc-to-dc converters: An isolated DC-to-DC converter comprises a converter section configured to receive an input voltage and produce an isolated output voltage and a controller section configured to control the operation of the converter section to maintain the output voltage at a predetermined value by, at least in part, turning switches on... Agent: Honeywell International Inc.

20070115699 - Soft-switching power converter having power saving circuit for light load operations: A soft switching power converter includes a first switch for switching a transformer to transfer energy. A second switch is equipped to switch energy in a capacitor to the transformer to achieve soft switching for the next switching cycle. A control circuit is coupled to an output of the power... Agent: J.c. Patents, Inc.

20070115700 - Transformer with current sensing means: A power transformer for a power converter includes a magnetic core, a primary winding and two serially connected secondary windings. In order to sense the output current to generate therefrom a control signal for controlling a switching of the synchronous rectifiers of the power converter, the power transformer includes an... Agent: Gallagher & Kennedy, P. A.

20070115701 - Electric power converter: In an electric power converter, a main circuit unit and a control unit are detachably attached to each other, and another control unit differing in a control manner can be newly attached to the single main circuit unit. Moreover, the main circuit unit includes a storage unit that stores at... Agent: Sughrue Mion, PLLC

20070115702 - Device having inductors and capacitors: An LC device having a substrate, a support layer having upper and lower sides formed on the substrate, inductors formed on either the upper or lower side of the support layer, and capacitors formed in the opposite side of the support layer. The support layer may be formed of a... Agent: Lee & Morse, P.C.

20070115704 - Apparatus and method for power conversion having diode in charging and discharging circuit: A power converting apparatus includes a rectifying circuit having a pair of AC power input terminals and a pair of rectified voltage output terminals; a reactor; and a charging and discharging circuit connected between the rectified voltage output terminals. The charging and discharging circuit includes a first condenser connected with... Agent: Young & Thompson

20070115703 - Soft-transition controller, method of controlling a soft transition and a synchronous converter employing the same: The present invention provides a soft-transition controller for use with a synchronous converter having primary and secondary rectifiers. In one embodiment, the soft-transition controller includes a primary driver configured to provide a primary drive signal to the primary rectifier operating in a synchronous mode, while the secondary rectifier is operating... Agent: Hitt Gaines P.C.

20070115706 - Biased-mosfet active bridge: A transistor active bridge circuit (100) provides operation and protection for devices from the effects of battery polarity reversal. The circuit includes first and second field-effect transistors (102, 104) of a first channel type, and third and fourth field-effect transistors (106, 108) of a second channel type that is different... Agent: Sacco & Associates, Pa

20070115705 - Operation of a half-bridge, in particular a field-effect transistor half-bridge: The invention relates to a circuit configuration (1) for controlling the operation of a half-bridge (13) by pulse-width modulation, especially in a synchronous rectifier mode. Said circuit configuration comprises a first terminal connection (23, 25) for electrically connecting the circuit configuration (1) to an insulated gate terminal of a bridge... Agent: Lerner Greenberg Stemer LLP

20070115707 - Vehicle auxiliary machine having an inverter circuit: A vehicle auxiliary machine having an inverter circuit includes an inverter cover, an inverter cover fastening member, an interlock plate and an interlock switch mechanism. The inverter cover covers the inverter circuit. The inverter cover fastening member is provided for fastening the inverter cover to the vehicle auxiliary machine. The... Agent: Woodcock Washburn LLP

20070109816 - Controller having ouput current control for a power converter: A controller controls the output current by measuring and controlling the switching current of the power converter. A first circuit generates a first signal in accordance with the switching current. A second circuit detects a discharge-time of the transformer. A third circuit generates a third signal by integrating the first... Agent: Rosenberg, Klein & Lee

20070109817 - Inverter circuit: An inverter circuit includes a first driving transformer, a second driving transformer, a power voltage circuit, a high-side FET connected to a secondary winding of the first driving transformer, a low-side FET connected to a secondary winding of the second driving transformer and an inverter transformer connected to a driving... Agent: Cantor Colburn, LLP

20070109818 - Switching mode power supply: A charging mode control circuit (320) includes a detecting circuit (321) and a charging control circuit (322). The detecting circuit detects whether a power/data interface (310) is in a communication state, and accordingly outputting a control signal. The charging control circuit receives the control signal and obtaining power from the... Agent: North America Intellectual Property Corporation

20070109819 - Modulated tuned l/c transmitter circuits: A transmitter circuit for generating a modulated oscillating output signal, comprises a tuned inductor-capacitor resonant circuit, and further comprise switching means for changing the resonant circuit capacitance by switching a capacitance into and out of circuit, wherein the resulting change in resonant circuit output is used to provide modulation of... Agent: Barnes & Thornburg LLP

20070109820 - Power converter having phase lock circuit for quasi-resonant soft switching: The present invention provides a power converter having a phase lock circuit for quasi-resonant soft switching. The power converter includes a first circuit coupled to the feedback signal to generate a switching signal for switching a switching device and regulating the output of the power converter. A second circuit is... Agent: Rosenberg, Klein & Lee

20070109821 - Controller for regulating output current at the primary side of a power supply: A controller controlling the output current at the primary side of a power supply is provided. A waveform detector generates a current-waveform signal. A second control circuit generates an oscillation signal for determining the switching frequency of a switching signal. An integrator generates an integrated signal by integrating an average... Agent: Rosenberg, Klein & Lee

20070109822 - Zero voltage switch method for synchronous rectifier and inverter: The zero voltage switch (ZVS) method for the synchronous rectifiers and inverter. The ZVS method for synchronous rectifier, in which the rectifier diode is replaced by a bi-directional-current one directional-voltage blocking capability switch, by allowing and terminating current flow in a reverse direction, achieves zero voltage turn-on on both inverter... Agent: John S. Egbert Egbert Law Offices

20070109823 - Multi-level active filter: A multi-phase active filter includes a group of power cells electrically connected in a three-phase configuration, a precharging circuit, and a controller that controls the voltage delivered to the plurality of power cells. Each power cell includes an inverter having a pair of direct current (DC) terminals, at least one... Agent: Siemens Corporation Intellectual Property Department

20070109825 - Adaptive pwm pulse positioning for fast transient response: An adaptive pulse positioning system for a voltage converter providing an output voltage, the system including a PWM generation circuit, a sensor, and a pulse positioning circuit. The PWM generation circuit generates a PWM signal with PWM pulses for controlling the output voltage of the voltage controller. The sensor senses... Agent: Law Offices Of Gary R. Stanford

20070109824 - Voltage control and harmonic minimization of multi-level converter: A controller applies a pattern of pulses to switching elements within a multi-level controller to effectuate control of the fundamental voltage magnitude and phase associated with the converter, as well as providing harmonic minimization of the 5th and 7th level harmonics. The controller combines a first pattern of pulses with... Agent: Kinney & Lange, P.A.

20070109826 - Lus semiconductor and synchronous rectifier circuits: The Lus Semiconductor in this invention is characterized by replacing the static shielding diode (SSD) of traditional Power Enhancement Mode field Effect Transistor (EMFETs) with polarity reversed (comparing with traditional SSD) SSD, Schottky Diode, or Zener Diode, or face-to-face or back-to-back coupled Schottky Diodes, Zener Diodes, Fast Diodes, or Four... Agent: Chao-cheng Lu

20070109827 - Ac to dc converter circuit: An AC to DC converter circuit 300 includes a transformer 316 having primary 314 and secondary 320 windings, a rectifier bridge 322 coupled to the secondary winding, a DC filter capacitor 328 coupled to the rectifier bridge, a voltage regulator 330 coupled the DC filter capacitor and to DC output... Agent: Westman Champlin & Kelly, P.A.

20070103940 - Ice-cube complete filling detector and refrigerator comprising the same: An ice-cube complete filling detector and a refrigerator comprising the same comprise a cam, an arm lever rotated by the cam, a detector driving gear rotated by the arm lever, a detector driven gear rotated by the detector driving gear, and an ice-cube detection lever connected to the detector driven... Agent: Birch Stewart Kolasch & Birch

20070103941 - Non-isolated dc-dc converters with direct primary to load current: DC-DC converters have high side and rectifier circuits, and output capacitor. High side circuit connects between input voltage and output voltage, and has primary winding and auxiliary section that operate transformer properly. Auxiliary may have switches or combination of switches and capacitors. High side circuit converts electrical into magnetic energy... Agent: Ralph A. Dowell Of Dowell & Dowell P.C.

20070103942 - Backlight module, inverter, and dc voltage generating method thereof: A backlight module, inverter, and DC voltage generating method thereof is disclosed. The inverter of the backlight includes a power converting device, a transformer, and a rectification circuit. The power converting device is coupled to a first DC voltage for outputting a first AC voltage. The transformer includes a primary... Agent: Bacon & Thomas, PLLC

20070103943 - Capacitor charging methods and apparatus: A capacitor charging circuit is provided with a primary side output voltage sensing circuit including an RC network having an RC time constant with a predetermined relationship to the RC time constant of the output capacitor. Once the capacitor voltage reaches a fully charged level, the charging mode is terminated.... Agent: Daly, Crowley, Mofford & Durkee, LLP

20070103944 - Control method of switching a power supply circuit: A switching power supply for achieving a constant current drooping characteristic of sufficient accuracy with low cost and the minimum number of components. In the switching power supply, a secondary duty limiter circuit outputs a clock signal from the time a switching element is turned off until the time the... Agent: Steptoe & Johnson LLP

20070103945 - Starting circuit and method for the stable starting of a circuit arrangement with plural feedback control circuits: In a method for starting a circuit arrangement an output signal of a circuit arrangement which comprises interlinked feedback control circuits is utilized as a control variable for the feedback control circuits and an input signal for the circuit arrangement is damped for a predetermined time period during a starting... Agent: Maginot, Moore & Beck

20070103946 - Switching-mode power supply having a synchronous rectifier: A switching-mode power supply capable of causing conduction through a synchronous rectifier switch exactly when required. Included is a transformer having a primary winding connected to a pair of DC input terminals via an active switch, and a secondary winding connected to a pair of DC output terminals via a... Agent: Woodcock Washburn LLP

20070103947 - Power source apparatus: A boost chopper circuit converts AC power to DC voltage and supplies the DC voltage to a load. The boost chopper circuit includes a switching element and a reactor. A controller ON/OFF controls the switching element based on a comparison result in an interval of the former half of a... Agent: Mcdermott Will & Emery LLP

20070103948 - Energy saving startup circuit for power supply: A startup circuit (30) for a power supply (44), has an input (31) for connecting to a source of high voltage thereo, and an output rail (33) for feeding rectified voltage to the power supply. A first energy storage device (35) is coupled to the output rail for storing energy... Agent: Browdy And Neimark, P.l.l.c. 624 Ninth Street, Nw

20070103949 - Power factor improving circuit: A power factor improving circuit including: a boost reactor that inputs a rectified voltage obtained by rectifying an AC power supply voltage of an AC power supply by a rectifier circuit; a main switch that inputs the rectified voltage through the boost reactor and is turned on/off; a converting section... Agent: Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.

20070103950 - Three-phase pwm-signal generating apparatus: An apparatus for generating a three-phase pulse-width-modulation signal for a three-phase voltage inverter employing a semiconductor switching element includes a generating unit that generates the three-phase pulse-width-modulation signal based on at least one combination of three basic voltage vectors and at least a zero vector.... Agent: Buchanan, Ingersoll & Rooney PC

20070103951 - Power converter apparatus: In a power conversion apparatus having a smoothing capacitor for smoothing rectified voltage, a power module containing a plurality of power semiconductor switching devices, and a drive circuit for controlling the turn-on and turn-off of the power semiconductor switching devices, wherein the power module is encased in the housing which... Agent: Crowell & Moring LLP Intellectual Property Group

20070103952 - Booster transformer for driving magnetron and transformer unit having the booster tranformer: A booster transformer 100 for driving a magnetron includes a bobbin 11 on which at least a first winding 13 and a secondary winding 15 are wound and a core 19 inserted through the center of the bobbin 11, wherein a winding area of the secondary winding 15 is divided... Agent: Pearne & Gordon LLP

20070097713 - Switching power supply and zvs method thereof: The provided switching power supply includes an auxiliary circuit having an auxiliary switch and a auxiliary capacitor, a transformer having a primary side coupled to the auxiliary circuit in parallel and a secondary side, an auxiliary switch control circuit coupled to the auxiliary switch and the primary side and fixing... Agent: Volpe And Koenig, P.C.

20070097714 - Dc-dc converter having synchronous rectification without cross conduction: An apparatus (54) is provided for preventing cross conduction in a synchronous rectifier of a DC-DC converter (10). The DC-DC converter has an input MOSFET switch (26) coupled to primary windings (22) of an isolation transformer (20), an output MOSFET switch (30) coupled to secondary windings (24) of the isolation... Agent: Honeywell International Inc.

20070097715 - Switching mode power supply and a method of operating the power supply in a power save mode: A switching mode power supply and a method of operating the power supply in a power save mode. The switching mode power supply includes a first PWM controller and a second PWM controller that are driven by different driving voltages and control first and the second voltages to be output,... Agent: Stanzione & Kim, LLP

20070097716 - Method and apparatus for power control: A power control system includes a power reduction module operable to reduce power to a connected load, a switching module operable to selectively transfer power directly to the load or to the power reduction module, a harmonic reduction module connected to an output of the power reduction module for reducing... Agent: Quarles & Brady LLP

20070097717 - Synchronous rectifier control circuit: A synchronous rectifier control circuit improves energy conversion efficiency and uses a signal produced by a secondary winding of a transformer in a rectifier circuit to control a low-impedance and a low power consuming current switch such as a JFET and a MOSFET in a synchronous rectifier circuit to substitute... Agent: Schmeiser, Olsen & Watts

20070097718 - Temperature estimation based on a signal oscillation: A method of estimating a temperature at a component of a device is provided. The temperature may be used to provide thermal load management of the device. In an exemplary embodiment, a switched mode power converter includes a power converter module and a switch that controls a switching cycle of... Agent: Foley & Lardner LLP

20070097719 - Cascaded step-up converter and charge pump for efficient compliance voltage generation in an implantable stimulator device: Disclosed herein are circuits and methods for generating a compliance voltage from a battery voltage in an implantable stimulator device. In one embodiment, the battery voltage is boosted to form the compliance voltage for driving the current sources (DACs) that provide therapeutic current to the electrodes on the device. Such... Agent: Wong, Cabello, Lutsch, Rutherford & Brucculeri, L.L.P.

20070097720 - Lus semiconductor and synchronous rectifier circuits: The Lus Semiconductor in this invention is characterized by replacing the static shielding diode (SSD) of traditional Power Metal Oxide Semiconductor Field Effect Transistors (Power MOSFETs) with polarity reversed (comparing with traditional SSD) SSD, Schottky Diode, or Zener Diode, or face-to-face or back-to-back coupled Schottky Diodes, Zener Diodes, Fast Diodes,... Agent: Chao-cheng Lu

20070097721 - Power supply to provide operation power for cooling fans: A power supply to provide operation power for cooling fans includes a non-stop power system to provide DC power in normal conditions to a remote switch control circuit to set a computer in an ON or OFF condition. The non-stop power system also outputs the DC power to a fan... Agent: Birch Stewart Kolasch & Birch