Power Electronics

Patents

POWER GENERATION SYSTEM

Issued March 16, 2010

United States Patent 7,680,562

A power generation system includes a converter configured for supplying power from a constrained power or energy source to a power network. The power generation system also has a control system configured for balancing instantaneously available power from the constrained source against demanded load from the power network by dynamically adjusting power network voltage, power network frequency, or a combination of power network voltage and power network frequency.

Inventors: Delmerico; Robert William (Clifton Park, NY), Achilles; Alfredo Sebastian (Bavaria, DE)

Assignee: General Electric Company (Niskayuna, NY)

Appl. No.: 11/221,473

Filed: September 8, 2005

POWER CONVERSION SYSTEM WITH GALVANICALLY ISOLATED HIGH FREQUENCY LINK

Issued March 16, 2010

United States Patent 7,679,941

A power conversion system has a three-phase AC input, where each AC input phase is linked to a string of cascaded single-phase AC-DC converters placed in series with a three-phase AC-DC converter. Each single-phase AC-DC converter in one embodiment includes a silicon carbide (SiC) pulse-width-modulated MOSFET H-bridge that placed in series with the three-phase AC-DC converter that includes a silicon (Si) SCR bridge. The single-phase AC-DC converters and the three-phase AC-DC converter together in one embodiment include a mixed silicon-carbide (SiC) and silicon (Si) device topology.

Inventors: Raju; Ravisekhar Nadimpal (Clifton Park, NY), Zhang; Richard S. (Rexford, NY), Datta; Rajib (Niskayuna, NY), Ritter; Allen Michael (Roanoke, VA), Stevanovic; Ljubisa Dragoljub (Clifton Park, NY)

Assignee: General Electric Company (Niskayuna, NY)

Appl. No.: 11/810,837

Filed: June 6, 2007

ELECTRONIC PACKAGE WHEREBY AN ELECTRONIC ASSEMBLY IS PACKAGED WITHIN AN ENCLOSURE THAT IS DESIGNED TO ACT AS A HEAT PIPE

Issued March 16, 2010

United States Patent 7,679,911

An electronic component or assembly that is assembled within a case that is designed to operate as a liquid phase-to-gas phase heat pipe where the electronic component or assembly is introduced into a liquid or partially liquid partially gaseous environment; whereby said liquid evaporates into a gas absorbing heat energy and transferring it to and through the component's or assembly's case. The electronics enclosure will be engineered out of materials that do not contaminate the liquid. Also, electronics with ions will be engineered to include a plurality of chambers/towers that extend in various directions providing enhanced heat pipe functionality in any physical orientation.

Inventors: Rapp; Robert J (Lake Forest, CA)

Appl. No.: 12/286,211

Filed: September 29, 2008

THREE-PHASE VOLTAGE SOURCE INVERTER SYSTEM

Issued March 16, 2010

United States Patent 7,679,940

The present invention provides a three-phase voltage source inverter system capable of obtaining a nearly sinusoidal output waveform while minimizing apparatus size increase and cost increases. The three-phase voltage source inverter system is provided with a three-phase inverter unit INV-M. An auxiliary circuit 1 is inserted between a direct-current power source and the three-phase inverter unit, including dividing capacitors Cd1, Cd2 dividing a direct-current voltage of the direct-current power source. There is also a single-phase inverter unit, INV-A, in which 60-degree ON-periods are set for upper switching elements S7, S8 in each phase of single-phase with an 80-degree delay, and 60-degree ON-periods set for lower switching elements S9, S10 in each phase of single-phase with a 60-degree delay from the upper side switching elements. .

Inventors: Masukawa; Shigeo (Tokyo, JP)

Assignee: Tokyo Denki University (Tokyo, JP)

Appl. No.: 12/182,882

Filed: July 30, 2008

FLYBACK CONVERTER PROVIDING SIMPLIFIED CONTROL OF RECTIFIER MOSFETS

Issued March 16, 2010

United States Patent 7,679,937

The present invention provides methods and systems for a flyback converter arranged with synchronous rectifier MOSFETS in such a manner that they operate with a common source potential while still providing for the use of a stacked output winding. With a common source potential, a single rectifier control voltage can be used to operate the rectifiers for multiple outputs greatly simplifying the control circuit. The proposed flyback converter maintains the inherent simplicity of the flyback design while enabling designs with well-regulated multiple voltage outputs and the efficiency benefits of synchronous rectification.

Inventors: Wingrove; Michael J. (Kanata, CA), Malecki; David R. (Stittsville, CA)

Assignee: Ciena Corporation (Linthicum, MD)

Appl. No.: 11/786,147

Filed: April 10, 2007

CLOSED-LOOP DIGITAL CONTROL SYSTEM FOR A DC/DC CONVERTER

Issued March 16, 2010

United States Patent 7,679,347

A closed-loop digital control system comprises a DC/DC converter that includes first and second inductances, that receives a first DC voltage and that generates a second DC voltage. A control module selectively charges or discharges the first inductance, while discharging or charging the second inductance during a first mode. The control module charges both of the first and second inductances or discharges both of the first and second inductance during a second mode.

Inventors: He; Runsheng (Sunnyvale, CA), Chi; Zhipei (Sunnyvale, CA)

Assignee: Marvell World Trade Ltd. (St. Michael, BB)

Appl. No.: 11/710,384

Filed: February 23, 2007

MULTIPLE MAGNETIC CORE INDUCTOR

Issued March 16, 2010

United States Patent 7,679,482

A multiple magnetic core inductor includes a first magnetic substance core which has a middle leg, a first outer leg, a second outer leg, and a body portion interconnecting the middle leg, the first outer leg and the second outer leg, and a second magnetic substance core opposed to the first magnetic substance core. A first conductor is arranged in a first space which is formed by the middle leg, the first outer leg, part of the body portion, and the second magnetic substance core. A second conductor is in a second space formed by the middle leg, the second outer leg, part of the body portion, and the second magnetic substance core.

Inventors: Yamada; Seiichi (Sendai, JP), Takahata; Okikuni (Sendai, JP), Kamata; Hiroyuki (Sendai, JP), Tsuda; Fumishirou (Sendai, JP), Kondo; Masahiro (Sendai, JP)

Assignee: NEC Tokin Corporation (Tokyo, JP)

Appl. No.: 12/133,614

Filed: June 5, 2008

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