Ronald A Davison

US Patent:

7869176, Jan 11, 2011

Filed:

May 25, 2007

Appl. No.:

11/807230

Inventors:

Ronald Stuart Davison - Vista CA, US

Assignee:

Hamilton Sundstrand Corporation - Rockford IL

International Classification:

H02H 3/20

US Classification:

361 911, 361 18, 361111

Abstract:

An overvoltage protection circuit for protecting a pass element in a controlled voltage supply circuit electrically connected between a circuit power supply interconnection terminal region suited for electrical connection to a circuit power supply and an output terminal, the pass element being protected from voltage surges that may occur on the circuit power supply interconnection with respect to a voltage reference interconnection. A voltage reference is provided electrically connected in series with a voltage. The voltage divider and the voltage reference are connected in series with one another between the circuit power supply interconnection and the voltage reference interconnection. A threshold switch is electrically connected to a corresponding one of the voltage divider output and one of the voltage divider terminating regions terminating regions, and has an output coupled to the pass element control region.

US Patent:

20100324799, Dec 23, 2010

Filed:

Jun 18, 2009

Appl. No.:

12/487041

Inventors:

Ronald Stuart Davison - Vista CA, US

International Classification:

F02C 9/00
G01P 3/44
G01M 19/00

US Classification:

701100, 702145, 702183

Abstract:

A turbo machine includes a speed probe that is configured to detect a speed of a rotating feature. Engine controls are used by a processor to control operation of the turbo machine. The processor communicates with the speed sensor and receives the speed signal to produce a command signal. A detection module is arranged in parallel with the processor and communicates with the speed probe to receive the speed signal. The detection module compares the speed signal with data to determine whether the speed signal is reliable. In one example, the detection module bypassed the processor and sends a corrective command directly to an engine control device in response to an unreliable speed signal.

US Patent:

20190356227, Nov 21, 2019

Filed:

May 15, 2019

Appl. No.:

16/413394

Inventors:

Ronald S. Davison - San Diego CA, US

International Classification:

H02M 3/158
H02M 1/00
H02M 1/08

Abstract:

A DC/DC converter is embodied in a single integrated circuit (IC) and may comprise a book-boost converter or a buck then boost or boost then buck converter. A first protection switch is connected between a bus, or input, terminal and one side of the DC/DC converter circuit art. A second protection switch is connected between an energy storage, or output, terminal and an inductor which is coupled to another side of the DC/DC converter circuit. This IC comprises input and output protection switches for input reverse voltage protection and overvoltage protection from transients. Additionally, passive filters may be connected to an input of each protection transistor to absorb overvoltages, transients, and current inrushes. The structure may comprise a two quadrant converter. Another embodiment comprises a four-quadrant converter comprising a first and a second opposed to quadrant converter.