Electric power conversion systems inventions 06/08

20080151580 - High efficiency power converter: A power converter nearly losslessly delivers energy and recovers energy from capacitors associated with controlled rectifiers in a secondary winding circuit, each controlled rectifier having a parallel uncontrolled rectifier. First and second primary switches in series with first and second primary windings, respectively, are turned on for a fixed duty... Agent: Hamilton, Brook, Smith & Reynolds, P.c.

20080151581 - Small form factor power supply: A small form factor power supply includes a switching transformer, control circuitry and rectifier circuitry, each contained within a housing. The switching transformer has a planar core and windings which surround at least a portion of the planar core. The control circuitry includes at least one surface mounted component, to... Agent: Pillsbury Winthrop Shaw Pittman LLP

20080151582 - High efficiency power converter: A power converter nearly losslessly delivers energy and recovers energy from capacitors associated with controlled rectifiers in a secondary winding circuit, each controlled rectifier having a parallel uncontrolled rectifier. First and second primary switches in series with first and second primary windings, respectively, are turned on for a fixed duty... Agent: Hamilton, Brook, Smith & Reynolds, P.c.

20080151583 - Inverter apparatus: An inverter apparatus can lengthen a lift span and improve efficiency. Instead of a conventional electrolytic capacitor, only a noise absorption film capacitor is provided in a DC intermediate circuit between rectifying and inverter circuits. In a voltage command generating unit, when a frequency set by a frequency setting unit... Agent: Young & Thompson

20080151584 - Ion engine power supply: A power supply for an ion engine comprises a multiphase alternator and a power converter comprising a voltage multiplier coupled to each phase of the alternator. Each voltage multiplier comprises one or more staged voltage doublers. The alternator phases may be coupled to each other in a Y configuration such... Agent: Proskauer Rose LLP

20080151585 - Converter control apparatus: A converter control apparatus comprises menas (14) (15) (17) for detecting output powers of a plurality of converters (100) connected in parallel to a load; an arithmetic circuit (19) for calculating an average output power of the converters on the basis of the detected output powers, and an output power... Agent: Buchanan, Ingersoll & Rooney Pc

20080151586 - Control circuit for converters: The invention relates to a converter circuit, in particular having a class E converter, having an improved drive circuit for a switching transistor MOS1 having two series-connected components which operate as a function of the threshold value, in particular comparators K1, K1′ and K2, K2′.... Agent: Osram Sylvania Inc

20080151587 - Inverter circuit with switch circuit having two transistors operating alternatively: An exemplary inverter circuit (2) includes a first switch circuit (22) including a first transistor (221) and a second transistor (222); a second switch circuit (23) including a third transistor (231) and a fourth transistor (232); and a pulse width modulation circuit (21) including a first output terminal (211) and... Agent: Wei Te Chung Foxconn International, Inc.

20080144338 - Dc/dc converter, and power amplifier applying the same: A DC/DC converter capable of controlling an output signal using a broadband signal input is provided. By employing the above DC/DC converter as a power supply, a highly efficient power amplifier can be configured. The above DC/DC converter includes two class-C amplifiers, a rectifier circuit connected between each output of... Agent: Bingham Mccutchen LLP

20080144339 - Resonant converter with synchronous rectification drive circuit: The present invention provides a resonant converter with a synchronous rectification drive circuit. The resonant converter with the synchronous rectification drive circuit includes a switch circuit, a resonant circuit, a transformer, a full-wave-rectifier circuit and a synchronous rectification drive circuit, wherein the switch circuit at least includes a half-bridge circuit,... Agent: Haverstock & Owens LLP

20080144340 - Rectifier filter control device for a power supply: A rectifier filter control device for a power supply that includes: A saturable inductor (swing choke), capacitors; and rectifiers connected to a rectifier filter circuit. The rectifier filter circuit further includes two electronic switches, which are respectively connected to two terminals of each of the two rectifiers. Should a reverse... Agent: Troxell Law Office Pllc

20080144341 - Power converter: A switch-type power converter includes a double FET switch operating in a variable duty cycle mode under the control of a Unitrode 3846 integrated circuit controller. Indications of excess input voltage and reverse battery connections are provided by circuits including an element which permanently changes state. A cooling fan mounted... Agent: Young & Basile, P.c.

20080144342 - Adaptive power electronics interface for hybrid energy systems: An adaptive hybrid energy system is provided. The system includes a first DC energy source that generates a first DC electrical output by converting a first type of energy into an electrical output. Additionally, the system includes at least a second DC energy source that generates a second DC electrical... Agent: Akerman Senterfitt

20080144343 - Compensation circuit and compensation method for current mode power converters: A compensation circuit and a compensation method for providing compensation of a power converter are proposed. A current sense circuit is coupled to receive a switching current for generating a current signal. A signal generation circuit is developed to generate a first compensation signal and a second compensation signal for... Agent: Rosenberg, Klein & Lee

20080144344 - Static inverter with hardened environmental housing: A static inverter assembly including a housing, a heat sink connected to the housing to define an enclosed three-dimensional volume, the heat sink including at least one channel extending therethrough, the channel including a plurality of cooling fins, a cooling fan positioned relative to the channel to encourage a fluid... Agent: Thompson Hine L.l.p. Intellectual Property Group

20080137379 - Pulse width modulation for synchronous rectifiers in dc-dc converters: A dc-dc converter includes a converter circuit having at least one synchronous rectifier and an active switch. A voltage compensator is connected to an output voltage of the converter circuit and produces a control voltage. A pulse width modulator output is connected to each of the synchronous rectifiers and the... Agent: Harness, Dickey, & Pierce, P.l.c

20080137380 - Switch mode power supply systems: This invention relates to methods and apparatus for sensing the output current in a switch mode power supply (SMPS) using primary side sensing. We describe a module which senses a current in a primary winding of a transformer and a voltage on a primary or auxiliary winding of the transformer,... Agent: Schwegman, Lundberg & Woessner, P.a.

20080137381 - Generation of auxiliary voltages in a ballast: An embodiment of the invention provides an apparatus for generating an auxiliary voltage in a ballast. The apparatus includes a transformer and a resonant circuit that is coupled to the input of the transformer. The apparatus also includes a first auxiliary circuit that is coupled to the auxiliary output of... Agent: Hewlett Packard Company

20080137382 - Collection and transmission system: A collection and transmission system (10) includes: a system direct current (DC) link (12) configured for carrying power from a source (13) to a grid (16); and alternating current (AC) to DC power converter modules (19, 119, 219, 319) coupled in series to the system DC link on a source... Agent: General Electric Company Global Research

20080137383 - Two-phase power converter apparatus and method: A power conversion apparatus and method suitable for use with a variable speed two-phase generator are disclosed herein. A rectifier module is adapted to receive varying electrical power from a generator and produce a direct current link voltage with a controlled magnitude at a direct current link; and an inverter... Agent: Stikeman Elliott LLP

20080137384 - Mixed-mode dc/ac inverter: A DC/AC inverter and method thereof is disclosed. The DC/AC inverter for driving a load includes a DC power supply for supplying a DC input voltage, a converter circuit coupled to the DC power supply which converts the DC input voltage into an AC signal used to drive the load,... Agent: O2micro Inc C/o Murabito, Hao & Barnes LLP

20080137385 - Lamp driving circuit and display apparatus having the same: A lamp driving circuit includes: a first voltage generator which receives a direct current power voltage and outputs a first square wave voltage in response to a first switching signal and a second switching signal having a phase inverted with respect to the first switching signal; a second voltage generator... Agent: Cantor Colburn, LLP

20080137386 - Portable power supply apparatus capable of receiving ac or dc input power: A DC-to-DC power adapter includes a first DC power input portion, a DC-to-DC power converting circuit and a first DC power output portion. The first DC power input portion is selectively connected to an AC-to-DC power adapter or a DC power connector for receiving a first input DC voltage from... Agent: Madson & Austin

20080130320 - 40 phase-shifting autotransformer: The invention relates to an autotransformer for transforming a three-phase power supply into a nine-phase power supply, notably for use in a rectifier. The autotransformer is a, step-up or step-down transformer. For a step-down application, the three-phase input terminals E1, E2, E3 are connected to one of the three main... Agent: Lowe Hauptman Gilman & Berner, LLP

20080130321 - Power converter with an adaptive controller and method of operating the same: A controller for a power converter, and method of operating the same. The controller improves power converter operating efficiency by regulating an internal power converter operating characteristic depending on a value of a power converter parameter measured after a manufacturing step, or an environmental parameter, preferably employing a table with... Agent: Slater & Matsil, L.l.p.

20080130322 - Power system with power converters having an adaptive controller: A power system having a power converter with an adaptive controller. The power system is coupled to a load and includes a power system controller that receives a signal indicating a system operational state of the load and selects a power converter operational state as a function thereof. The power... Agent: Slater & Matsil, L.l.p.

20080130323 - Method modular power supply for x-ray tubes and method thereof: A power supply power supply (30) comprising a DC voltage supply, a control unit and a plurality of high voltage channels (33a-33d) is suggested. Each high voltage channel (33) includes an inverter (IKTV), a resonance circuit, a transformer (TR), and a rectifier (RECT). The resonance circuit cooperates with the inverter... Agent: Philips Intellectual Property & Standards

20080130324 - Switch mode power supply and driving method thereof: The present invention relates to a switch mode power supply and a driving method for reducing switching loss and audible noise in the burst mode. The switch mode power supply includes a main switch, a power supply, an output unit, and a switch controller. The power supply includes a transformer... Agent: Sidley Austin LLP

20080130325 - Flyback dc-dc converter: A flyback DC-DC converter is disclosed herein. The flyback DC-DC converter includes a controller, an input switching circuit, a transformer and an output switching circuit. The input switching circuit is controlled by the controller and thus controls power supply to the transformer. The transformer is equipped with a first secondary... Agent: O2micro Inc C/o Murabito, Hao & Barnes LLP

20080130326 - Zero voltage switch method for fly-back converter: The present invention discloses a 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, zero voltage turn-on... Agent: Wpat, Pc Intellectual Property Attorneys

20080130327 - Power supply circuit with at least one feedback circuit feeding operating state of transformer back to pulse width modulation circuit thereof: An exemplary power supply circuit (20) includes a first commutating and filter circuit (21), a transformer (24), a second commutating and filter circuit (25), a transistor (27), a pulse width modulation circuit (26) outputting a control signal to control operation state of the transistor, and a feedback circuit (29). An... Agent: Wei Te Chung Foxconn International, Inc.

20080130328 - Variable-mode converter control circuit and half-bridge converter having the same: A converter control circuit applicable to various topologies of converters each employing two switching devices is disclosed. The converter control circuit includes an oscillator for generating a pulse signal and triangle-wave signal of a certain frequency, a switching control signal output unit for outputting a switching control signal to control... Agent: Sidley Austin LLP

20080130329 - Voltage control apparatus of semiconductor device: A miniaturized system on a chip that incorporates a positive high voltage charge pump and a negative high voltage charge pump into one pump circuit and shares components. A voltage control apparatus in a semiconductor device may include at least one of the following: First and second input/output units capable... Agent: Sherr & Nourse, Pllc

20080130330 - Current sensing in a power converter: In one embodiment, a power converter system includes a power device coupled between a first node and second node. The power device is operable to be turned on and off by a control signal. Current flows through the power device when the power device is turned on for delivering power... Agent: Sidley Austin LLP

20080130331 - Amplifier symmetric supply regulation: A power converter receiving a single-sided supply which is ground-terminated and providing a regulated positive supply and a regulated negative supply that is optimized to the expected output range of a class AB amplifier, as well as providing excellent efficiency. The converter finds application as a compact converter to power... Agent: Texas Instruments Incorporated

20080130333 - Method for recognizing the load of an island inverter and island inverter: The invention relates to a method for recognizing the operational state of a load (10) connected to the output (6,7) of an island inverter (1). A load recognition signal (SL) is applied at specific moments in time to the output (6, 7) of the island inverter (1), during which specific... Agent: Collard & Roe, P.c.

20080130332 - Power supply apparatus, methods and computer program products using d-q domain based synchronization techniques: A value of an AC reference waveform is obtained and converted to a d-q reference frame value. A phase estimate is generated responsive to the d-q reference frame value. An AC output of the power supply apparatus is controlled responsive to an output current of the power supply apparatus and... Agent: Myers Bigel Sibley & Sajovec

20080130334 - Determining reflected power: There is provided a switching circuit (50) comprising: a transformer (TR1) including at least one winding (P1, S1, S2); a switching device (FET1) coupled between a source of power (60) and the transformer (TR), the switching device (FETI) being coupled to a driving circuits (100) for periodically driving the switching... Agent: Nxp, B.v. Nxp Intellectual Property Department

20080130335 - Instantaneous voltage-drop compensation circuit, power conversion apparatus, instantaneous voltage-drop compensation method and computer readable medium storing instantaneous voltage-drop compensation program: An instantaneous voltage-drop compensation circuit including: a first voltage detector detecting three-phase voltages to be input to a power converter converting three-phase AC to DC based on control pulse signals, and outputting three-phase voltage signals; a first three-phase to two-phase converter converting the detected signals to two-phase voltage signals; a... Agent: Oliff & Berridge, Plc

20080130336 - Power supply device: A switching operation is performed on a switching element of a power-factor improving unit that includes a reactor. An output voltage of the power-factor improving unit is set to a load voltage by switching on and off the switching element based on a result of comparison between an input current... Agent: Mcdermott Will & Emery LLP

20080130337 - Voltage generating circuit: A voltage generating circuit for generating a DC voltage at both ends of a series capacitor based on an AC voltage generated from an AC power supply with one end thereof connected to a coil, the series capacitor including a first capacitor and a second capacitor with a series connecting... Agent: Socal Ip Law Group LLP

20080130338 - Active rectifier: A voltage signal rectifier produces a rectified voltage signal from an input offset voltage signal. The voltage signal rectifier includes input offset, output, and reference nodes, two actively controlled current regulation elements (ACCREs), and two controllers. The input offset node is coupled to the input offset voltage signal. The rectified... Agent: Hanes & Schutz, Llc

20080130339 - Apparatus and methods for power conversion: An alternating current (AC) to direct current (DC) power converter comprises a first electrical path in a primary circuit having an inductor coupled in series with a first primary winding and a first switch to a ground connection. A second electrical path in the primary circuit has the inductor coupled... Agent: Andrea E. Tran Pramudji Wendt & Tran, LLP

20080130340 - Power brick with passthrough: A power brick device has a power brick housing. A male electrical plug electrically couples AC power to an interior portion of the power brick housing. A female electrical socket is coupled to the power brick housing and is electrically coupled to and receives AC power from the male electrical... Agent: Miller Patent Services