Power Electronics

Patents

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DC POWER SUPPLY WITH INPUT VOLTAGE POLARITY INDICATION

United States Patent 7,482,712

Ford, et al. January 27, 2009

A multi-mode electromagnetic radiation emitting device comprising at least one source of electromagnetic radiation which emits radiation according to predefined or programmable user selectable instruction sets is disclosed. Reversal of the polarity of the device's power supply allows for enhanced features to be accessed including multiple instruction sets per switch setting, reprogramming mode, infra-red (covert) mode, night mode and water activation mode. A switch mechanism for providing selectable switched circuit connections is also disclosed as well as a power supply for supplying DC power to an electronic circuit comprising at least one microcontroller or microprocessor.

Inventors: Ford; Timothy (Beaconsfield, CA), Gascon; Stephane (Mascouche, CA)

Assignee: The Flewelling Ford Family Trust (Beaconsfield, CA)

Appl. No.: 11/227,388

Filed: September 15, 2005

THERMACOUSTIC PIEZOELECTRIC GENERATOR

Issued August 10, 2010

United States Patent 7,772,746

An electroactive transducer converts between acoustical power and electrical power. The transducer includes a diaphragm and a perimeter member. The perimeter member includes at least one electroactive element and is mechanically coupled to the perimeter of the diaphragm such that displacement of the diaphragm stresses the electroactive element.

Inventors: Keolian; Robert M. (State College, PA), Wuthrich; John W. (Albany, NY), Bastyr; Kevin J. (Someville, MA)

Assignee: The Penn State Research Foundation (University Park, PA)

Appl. No.: 11/492,311

Filed: July 25, 2006

MULTIPHASE CONVERTER APPARATUS AND METHOD

Issued August 3, 2010

United States Patent 7,768,800

An ac/ac converter for accepting a pulsating dc input with encoded sinusoidal modulation and providing a multiphase modulated output. The converter comprises a bridge including a plurality of switches having switch legs for modulating the pulsating dc input at a carrier frequency over a plurality of phases. The bridge is coupled at one end to a pulsating dc source and coupled at another end to a modulated signal output. A controller is provided for the plurality of switches for causing, for each of the plurality of phases, under unity power factor, one of the switch legs to modulate the pulsating dc input at the carrier frequency while the other switch legs do not modulate the pulsating dc input at the carrier frequency.

Inventors: Mazumder; Sudip K. (Chicago, IL), Huang; Rongjun (Chicago, IL)

Assignee: The Board of Trustees of the University of Illinois (Urbana, IL)

Appl. No.: 12/334,273

Filed: December 12, 2008

BIDIRECTIONAL NO LOAD CONTROL WITH OVERSHOOT PROTECTION

Issued August 3, 2010

United States Patent 7,768,807

A method of operating an isolated bi-directional dc/dc converter to provide voltage regulation at a no-load condition over a wide voltage range and also provide overshoot protection for the boost mode main switching transistors uses new boost mode drive waveforms. The new waveforms drive switches S2 and S4 to be turned off during boost mode and only S1 and S3 are switched to provide reverse energy flow at no-load. In boost mode, C1 and C2 provide overshoot protection caused by leakage inductance of the isolation transformer when boost mode drive transistors turn off during forward energy flow and provide stored energy for reverse energy flow during reverse energy flow periods used for voltage regulation in the boost mode. In buck mode, C1 and C2 provide soft switching for buck mode main switching transistors S2 and S4.

Inventors: Chen; Keming (Torrance, CA), Schulz; Steven E. (Torrance, CA)

Assignee: GM Global Technology Operations, Inc. (Detroit, MI)

Appl. No.: 11/748,106

Filed: May 14, 2007

SYSTEM AND METHOD FOR THERMAL TO ELECTRIC CONVERSION

Issued August 3, 2010

United States Patent 7,767,903

A system and method for lower cost, solar thermal generation includes a thermal input block, and an energy storage block.

Inventors: Marshall; Robert A. (Georgetown, TX)

Appl. No.: 10/984,262

Filed: November 9, 2004

METHOD FOR MAKING MAGNETIC COMPONENTS WITH N-PHASE COUPLING, AND RELATED INDUCTOR STRUCTURES

Issued August 10, 2010

United States Patent 7,772,955

Methods and structures for constructing a magnetic core of a coupled inductor. The method provides for constructing N-phase coupled inductors as both single and scalable magnetic structures, where N is an integer greater than 1. The method additionally describes how such a construction of the magnetic core may enhance the benefits of using the scalable N-phase coupled inductor. The first and second magnetic cores may be formed into shapes that, when coupled together, may form a single scalable magnetic core. For example, the cores can be fashioned into shapes such as a U, an I, an H, a ring, a rectangle, and a comb, that cooperatively form the single magnetic core.

Inventors: Li; Jieli (Albany, CA), Sullivan; Charles R. (West Lebanon, NH), Gentchev; Angel (Fremont, CA)

Assignee: Volterra Semiconductor Corporation (Fremont, CA)

Appl. No.: 11/852,231

Filed: September 7, 2007

WIRELESS BATTERY TESTER WITH INFORMATION ENCRYPTION MEANS

Issued August 10, 2010

United States Patent 7,772,850

An electronic battery tester and method includes generating battery test data from an electronic battery test. The battery test data is transmitted over a wireless communication medium. In another aspect, a method and apparatus is provided for receiving battery test data from a wireless communication medium. Also, a diagnostic battery charger, which is capable of transmitting battery condition information to an external receiver, is provided.

Inventors: Bertness; Kevin I. (Batavia, IL)

Assignee: Midtronics, Inc. (Willowbrook, IL)

Appl. No.: 11/178,550

Filed: July 11, 2005

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