Power Electronics

Power Electronics Patents

SYSTEM AND METHOD FOR CHARACTERIZING A SYSTEM

Issued March 17, 2009
U.S. Patent 7,504,877
Salsbury

A method and apparatus of identifying a system is disclosed. The method comprises estimating at least one parameter in a second-order model of the system, and approximating at least one parameter in a first-order model of the system from the at least one second-order model parameter. The method may also comprise sampling an input to the system, sampling an output from the system. The apparatus comprises a device for estimating at least one parameter in a second-order model of the system, and device for approximating at least one parameter in a first-order model of the system from the at least one second-order model parameter.

Inventor: Salsbury; Timothy I. (Whitefish Bay, Wis.)

Assignee: Johnson Controls Technology Company (Holland, Mich.)

Appl. No.: 10/093,857

Filed: March 8, 2002

METHOD FOR OPERATING A FREQUENCY CONVERTER CIRCUIT

Issued March 17, 2009
U.S. Patent 7,504,607
Barragan Perez, et al

A frequency converter circuit has at least two outputs that are respectively connected to a load, in particular an induction coil. A first output is operated at a first switching frequency, and a second output is simultaneously operated at a second switching frequency that is different from the first, in such a way that noise having a frequency generated by the superposition of the first switching frequency and the second switching frequency is produced. The frequency converter circuit is operated in such a way that the frequency of the noise is lower than a first cutoff frequency and/or is higher than a second cutoff frequency.

Inventors: Barragan, Perez; Luis, Angel (Zaragoza, Spain), Burdio, Pinilla; Jose, Miguel (Zaragoza, Spain); Hernandez, Blasco; Pablo, Jesus (Zaragoza, Spain); Gil, Sergio Llorente (Zaragoza, Spain); Perez, Alfonso Lorente (Zaragoza, Spain); Aznar, Fernando Monterde (Zaragoza, Spain)

Assignee: BSH Bosch und Siemens Hausgeraete GmbH (Munich, Germany)

Appl. No.: 10/578,107

Filed: Nov. 2, 2004

PCT Filed: Nov. 2, 2004

PCT No.: PCT/EP2004/052755371(c)(1),(2),(4)

Date: July 17, 2006

PCT Pub. No.: WO2005/043737

PCT Pub. Date: May 12, 2005

MANAGEMENT CIRCUITS AND METHODS FOR MANAGING A POWER SUPPLY

Issued March 17, 2009
U.S. Patent 7,504,800
Culbert, et al

Circuitry and techniques for managing a power supply are disclosed. A processor-controlled switch is employed to control the delivery of power to conductors that provide power to an external electronic device wherein the processor controls the switch opening and the switch opening based not only on contemporaneous parameter measurements but also on state information known to the processor. The management circuit can control the power supply without requiring the use of an additional sense wire between the management circuit and the external electronic device.

Inventors: Culbert, Michael (Monte Sereno, Calif.); Cox, Keith (Campbell, Calif.)

Assignee: Apple Inc. (Cupertino, Calif.)

Appl. No.: 11/327,820

Filed: Jan. 6, 2006

MULTIPHASE TRANSFORMER FOR A MULTIPHASE DC-DC CONVERTER

Issued March 17, 2009
U.S. Patent 7,504,808
Schrom, et al

A multiphase dc-dc converter is provided that includes a multiphase transformer, the multiphase transformer including a plurality of input voltage terminals and an transformer output voltage terminal, each input voltage terminal associated with a corresponding phase. Each phase is assigned to an input voltage terminal of the plurality of input voltage terminals to minimize a ripple current at the input voltage terminals of the multiphase transformer.

Inventors: Schrom, Gerhard (Hillsboro, Ore.); Hazucha, Peter (Beaverton, Ore.); Lee, Jaeseo (Los Angeles); Paillet, Fabrice (Hillsboro, Ore.); Karnik, Tanay (Portland, Ore.); De, Vivek (Beaverton, Ore.)

Assignee: Intel Corp. (Santa Clara, Calif.)

Appl. No.: 11/173,065

Filed: June 30, 2005

DISTRIBUTED POWER SUPPLY SYSTEM WITH SEPARATE SYNC CONTROL FOR CONTROLLING REMOTE DIGITAL DC-DC

Issued March 10, 2009
U.S. Patent 7,502,240
Leung, et al

A distributed power system for delivering dc power to a plurality of loads. A plurality of switching dc-dc converter modules are provided, each disposed proximate one of the loads and each having associated therewith a switching pulse generator for generating switching pulses. A distributed power line distributes input power to each of the modules, and a data communication line distributes command data between the modules, each of the modules uniquely addressable over the data communication line. A timing communication line is also provided for distributing timing information to each of the switching pulse generators. A master controller generates commands and communicates them to the data modules over the data communication line, the master controller operable to generate timing information over the timing communication line to each of the modules for controlling the associated switching pulse generator.

Inventors: Leung, Kafai (Austin, Texas); Leung, Ka Y. (Austin, Texas); Alfano, Donald E. (Round Rock, Texas)

Assignee: Silicon Laboratories Inc. (Austin, Texas)

Appl. No.: 11/396,145

Filed: March 31, 2006

DC-DC CONVERTER

Issued March 17, 2009
U.S. Patent 7,504,811
Watanabe, et al

A boost dc-dc includes an inductor connected at one end to the positive-pole terminal of a low-voltage-side port, a transformer of a magnetic-field cancellation type, including a primary winding and a secondary winding interconnected in an oppositely wound configuration, a common terminal of the primary winding and the secondary winding being connected to another end of the inductor. A switching element controls an energizing current of the primary winding flowing to a common reference terminal, and another switching element controls an energizing current of the secondary winding flowing to the common reference terminal. A diode allows current to flow in only one direction from the primary winding to the positive-pole terminal of a high-voltage-side port, and another diode allows current to flow in only one direction from the secondary winding to the positive-pole terminal of the high-voltage-side port.

Inventors: Watanabe, Yasuto (Wako, Japan); Hirakawa, Mitsuaki (Wako, Japan)

Assignee: Honda Motor Co. (Tokyo)

Appl. No.: 11/907,698

Filed: Oct. 16, 2007

INVERTER STARTUP ALGORITHM

Issued March 10, 2009
U.S. Patent 7,502,241
Taylor

A method for the startup of a solar power inverter in which a waiting period is increased between successive attempts to start the inverter. This method allows the inverter to start up in a reasonable amount of time while avoiding excessive cycling during prolonged periods of low light.

Inventors: Taylor, Bill (Bend, Ore.)

Assignee: PV Powered Inc. (Bend, Ore.)

Appl. No.: 11/400,761

Filed: April 7, 2006

CONFIGURABLE VOLTAGE-MODE TRANSMITTED ARCHITECTURE WITH COMMON-MODE ADJUSTMENT AND NOVEL PRE-EMPHASIS

Issued March 10, 2009
U.S. Patent 7,501,851
Venditti, et al

Configurable voltage-mode transmitter architectures are based on combinations of drive cells and parallel termination cells connected in parallel across an external load to provide configurable output characteristics. Each drive cell and parallel termination can be individually enabled, various configurations of enabled cells providing the output characteristics configurability. In some embodiments, dedicated or configured pre-emphasis drive cells with individual enablement capability are added. In some embodiments, pull-down and pull-up cells with individual enablement capability are added to provide additional configurability options. When present, the pre-emphasis, pull-down and pull-up cells are connected in parallel across the external load to provide pre-emphasis features to the output.

Inventors: Venditti, Michael Ben (Montreal); Lye,William Michael (Coquitlam, Canada)

Assignee: PMC Sierra Inc. (Santa Clara, Calif.)

Appl. No.: 11/752,941

Filed: May 24, 2007

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