Electric power conversion systems inventions 10/09

20090244928 - Dual gate lateral diffused mos transistor: A disclosed power transistor, suitable for use in a switch mode converter that is operable with a switching frequency exceeding, for example, 5 MHz or more, includes a gate dielectric layer overlying an upper surface of a semiconductor substrate and first and second gate electrodes overlying the gate dielectric layer.... Agent: Fsi C/o Jackson Walker, L.L.P.

20090244929 - Method and apparatus for extending zero-voltage swiitching range in a dc to dc converter: Apparatus for extending a zero voltage switching (ZVS) range during DC/DC power conversion. The apparatus comprises a DC/DC converter, operated in a quasi-resonant mode, comprising (i) a transformer, (ii) a primary switch, coupled to a primary winding of the transformer, for controlling current flow through the primary winding, and (iii)... Agent: Raymond R. Moser Jr., Esq. MoserIPLaw Group

20090244930 - Electrical dc-dc power converter with magnetically coupled switch control circuit: Power converter with a controllable first switch and a diode and a controllable second switch and a second diode, a transformer with a primary winding and a secondary winding, of which the secondary winding forms at least part of a control circuit for the first switch. As a result of... Agent: Philips Intellectual Property And Standards

20090244933 - Half-bridge llc resonant converter with self-driven synchronous rectifiers: The present invention discloses a half-bridge LLC resonant converter with self-driven synchronous rectifiers, which utilizes a primary IC controller and a gate driver to drive the secondary synchronous rectifiers. In correspondence with the gate drive output voltages of the primary IC controller to the primary switch transistors, the gate driver... Agent: Muncy, Geissler, Olds & Lowe, PLLC

20090244934 - Synchronous rectification circuit having burst mode controller and controlling method thereof: The configuration of a synchronous rectification circuit and a controlling method thereof are provided. The proposed circuit includes a converter including a first switch and a first synchronous rectifier, and a burst mode controller including a logic process module performing one of functions of delaying one of a non-integer and... Agent: Volpe And Koenig, P.C.

20090244932 - Synchronous rectifying apparatus and forward synchronous converter: A synchronous rectifying apparatus suitable for use in a forward synchronous converter having a transforming unit with a primary and secondary side, and a first and second rectifying switches coupled to the secondary side is provided. The synchronous rectifying apparatus has a condition detecting unit and a synchronous rectifying controller.... Agent: Nikolai & Mersereau, P.A.

20090244931 - Method and apparatus for providing an initial bias and enable signal for a power converter: The invention relates to a switch-mode power converter including a bias circuit. A power converter power transformer includes a magnetic core. The switch-mode power converter power transformer also includes an initial bias primary winding and an initial bias secondary winding, both wound on the magnetic core, wherein the initial bias... Agent: Hiscock & Barclay, LLP

20090244935 - Inverter apparatus with adaptable voltage-to-frequency control: An inverter apparatus has an adaptable high-resolution voltage-to-frequency (V/f) control. The inverter apparatus receives an analog input signal and includes a first circuit, a second circuit, a third circuit, and a micro-controller unit. The first circuit processes a small-signal portion of the analog input signal with a larger voltage gain.... Agent: Hdls Patent & Trademark Services

20090244936 - Three-phase inverter: The present invention relates to a three-phase inverter (1) with a circuit arrangement having a DC-voltage input (2) for at least one direct voltage source, and a three-phase alternating voltage output (15) for feeding into a three-phase alternating voltage mains (19), wherein said inverter comprises a three-phase bridge circuit (20)... Agent: Pyle & Piontek, LLC

20090244937 - Dc bus voltage harmonics reduction: In one aspect, in general, the invention features a control system configured for use with a three-phase PWM converter. The control system receives an input signal from a three-phase power supply and provides an output signal at a DC link. A voltage-separating module generates on the basis of the input... Agent: Occhiuti Rohlicek & Tsao LLP

20090244938 - Switching apparatus for grounding an inverter: A switching apparatus for grounding an inverter (3) that converts a direct current voltage into an alternative current voltage at mains frequency, with an inverter housing (7) and with a safety fuse (8) that connects a positive or a negative direct current voltage to a grounding terminal, is intended to... Agent: Pyle & Piontek, LLC

20090244939 - Method and apparatus for resetting silicon controlled rectifiers in a hybrid bridge: A method and apparatus for resetting Silicon Controlled Rectifiers (SCRs) in an H-bridge. The apparatus comprises a hybrid bridge, comprising at least one SCR and at least one switch, and an abnormal current detector, coupled to the hybrid bridge. The abnormal current detector detects an abnormal current in the hybrid... Agent: Raymond R. Moser Jr., Esq. MoserIPLaw Group

20090244940 - Voltage generating circuit: A voltage generating circuit is provided, including a voltage output terminal, a ground terminal, a capacitor, a selector, a first switch, and a second switch. The capacitor is connected between a pump signal and the output of the selector. The selector is controlled by a first control signal and used... Agent: Jianq Chyun Intellectual Property Office

20090244941 - Power source apparatus and image forming apparatus: A transformer accepts an AC voltage from an AC power source, transforms the AC voltage, and supplies the transformed AC voltage to first rectifying circuits. Similarly, another transformer accepts an AC voltage from an AC power source, transforms the AC voltage, and supplies the transformed AC voltage to second rectifying... Agent: Casella & Hespos

20090244942 - Synchronous rectification control circuit: A synchronous rectification control circuit is connected with a secondary-side rectification circuit and includes a driving circuit, a dead-time acquisition circuit, and a zero-voltage detection circuit. The driving circuit includes a differentiating circuit, a first comparator, and a capacitor, wherein the differentiating circuit generates a signal to the first comparator... Agent: Apex Juris, PLLC

20090244943 - Power converter: A power converter includes a small-sized inductor connected to an AC voltage input line for power factor correction and a filter for suppressing conduction noise. The inductor is connected to a rectifier and comprises first and second windings and that are wound on a common magnetic core and loosely coupled... Agent: Rabin & Berdo, PC

20090244944 - Power converter system that operates efficiently over a range of load conditions: A power converter system supplies power to one or more loads. The power converter system comprises at least one power converter operating at a desired efficiency; and a power storage system coupled to the at least one power converter for receiving power supplied from the at least one power converter... Agent: Venable LLP

20090244945 - Power converting apparatus: In a power converting apparatus in which two three-phase converters (1), (2) are operated parallel to one another, the three-phase converters (1), (2) are controlled by using d- and q-axis voltage commands. DC current sensors (26), (27) detect individual output DC currents (26a), (27a) of the three-phase converters (1), (2),... Agent: Buchanan, Ingersoll & Rooney PC

20090244946 - Dc-ac converter: A DC-AC converter includes a signal generating module, a first switch, a first capacitor, a transformer, and a trigger signal generating module. The signal generating module generates a pulse width modulation (PWM) signal according to a trigger signal. The first switch has a control terminal receiving the PWM signal, and... Agent: J C Patents, Inc.

20090244947 - Method and apparatus for resetting a silicon controlled rectifier bridge: A method and an apparatus for resetting at least one Silicon Controlled Rectifier (SCR) in an H-bridge. The apparatus comprises a current interruption device for controlling current flow through the H-bridge, and a negative voltage detector for detecting a negative voltage at the H-bridge and driving the current interruption device... Agent: Raymond R. Moser Jr., Esq. MoserIPLaw Group