Stephen F Guthrie

US Patent:

8000076, Aug 16, 2011

Filed:

Jul 15, 2009

Appl. No.:

12/503706

Inventors:

Stephen C. Guthrie - Allen TX, US
Subarna Pal - Mesquite TX, US

Assignee:

Lineage Power Corporation - Plano TX

International Classification:

H02H 9/00

US Classification:

361111, 361 56

Abstract:

An interrupter, a method of responding to a monitored event and an IC are disclosed. In one embodiment, the interrupter includes: (1) a monitoring circuit configured to monitor for an occurrence of at least one event and generate an external event signal when detecting the occurrence, (2) a microprocessor, having: (2A) at least one functional pin and (2B) a reset input pin, coupled to the monitoring circuit, the microprocessor configured to begin a reset process in response to receiving the external event signal at the reset input pin and thereby set the functional pin to a reset state, and (3) a responding circuit coupled to the functional pin and configured to initiate a predetermined action when the functional pin is set to a reset state.

US Patent:

8275559, Sep 25, 2012

Filed:

Mar 28, 2008

Appl. No.:

12/058437

Inventors:

Raymond Rene - Plano TX, US
Stephen C. Guthrie - Allen TX, US
Jacob Scaria - Mesquite TX, US

Assignee:

Linage Power Corporation - Mesquite TX

International Classification:

G01R 31/00
G01R 31/14

US Classification:

702 58, 324509

Abstract:

A fault detector for use with a telephone wire-pair having a return conductor and an output conductor, a method of protecting a telecommunications network including the telephone wire-pair and a power supply for the telecommunications network. In one embodiment, the fault detector includes (1) a passive sensor coupled between Earth and the wire-pair to detect a ground fault thereon, (2) an amplifier having inputs coupled across the passive sensor and configured to characterize the ground fault in terms of a value and (3) a controller configured to receive the value via an output of the amplifier and compare the value to a threshold to determine if the ground fault exceeds a safety limit.

US Patent:

20120169316, Jul 5, 2012

Filed:

Jan 4, 2012

Appl. No.:

13/343216

Inventors:

Stephen C. Guthrie - Allen TX, US
Subarna Pal - Wylie TX, US

Assignee:

Lineage Power Corporation - Plano TX

International Classification:

G05F 5/04

US Classification:

323301

Abstract:

A bias supply, a method of communicating data across an isolation barrier and a power supply are provided herein. In one embodiment, the bias supply includes: (1) a bias supply transformer having a primary winding inductively coupled to a secondary winding across an isolation barrier, (2) a controller configured to direct operation of the bias supply and (3) bias voltage manipulating circuitry, coupled to an input of the controller, configured to receive primary data and based thereon alter a secondary bias output voltage of the secondary winding between defined voltage levels by varying a voltage provided to the controller, the controller and the bias voltage manipulating circuitry located on the primary side.

US Patent:

20120294052, Nov 22, 2012

Filed:

May 17, 2012

Appl. No.:

13/474578

Inventors:

Raghothama Reddy - Murphy TX, US
Stephen Guthrie - Allen TX, US
Subarna Pal - Wylie TX, US

Assignee:

General Electric Co. - Schenectady NY

International Classification:

H02M 1/36

US Classification:

363 49

Abstract:

The power conversion module includes a power converter coupled to provide a DC output voltage from an input voltage source. The power converter may have primary and secondary stages, and the power converter may also provide a DC output voltage that is electrically isolated from the input voltage source. Additionally, the power conversion module also includes a voltage controller configured to measure a pre-bias value of the output voltage prior to start-up of the power converter and provide a start-up control signal, wherein the start-up control signal corresponds to an initial output voltage that is greater than the pre-bias value of the output voltage. The initial output voltage includes a start-up voltage margin above the pre-bias value and is maintained for a margin hold time. A method of operating a power conversion module is also provided.

US Patent:

20120327688, Dec 27, 2012

Filed:

Jun 8, 2012

Appl. No.:

13/491673

Inventors:

Stephen Guthrie - Allen TX, US
Subarna Pal - Wylie TX, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

H02M 3/22

US Classification:

363 15

Abstract:

A power conversion system includes a shared output bus and a plurality of power conversion units coupled to the shared output bus. Each power conversion unit includes a power converter having a converter output coupled to the shared output bus and a delay generator that generates a start-up delay for the power converter if a pre-bias value of a bus voltage on the shared output bus is greater than a predefined threshold. Each power conversion unit also includes a voltage controller that controls the converter output subsequent to the start-up delay and maintains a current sourcing condition of the converter output during start-up of the power converter. The power conversion system also includes a load that is coupled to the shared output bus. A method of operating a power conversion unit is also provided.

US Patent:

20130088894, Apr 11, 2013

Filed:

Oct 11, 2012

Appl. No.:

13/649743

Inventors:

Subarna Pal - Wylie TX, US
Stephen C. Guthrie - Allen TX, US

International Classification:

H02M 3/22

US Classification:

363 15

Abstract:

A power conversion unit includes a power converter and a controller coupled to the secondary or output stage of the power converter. The power conversion unit is configured to generate an output test voltage or current during a pre-start test period of the power converter, where the output test voltage or current is monitored to determine a converter fault condition. A method of operating a power conversion unit is also included.