Stephen J Hulsey

US Patent:

6822426, Nov 23, 2004

Filed:

Jun 6, 2003

Appl. No.:

10/456716

Inventors:

Philip C. Todd - Long Beach CA
Joe Anthony Ortiz - Garden Grove CA
Stephen John Hulsey - Los Angeles CA
Bruce R. Baker - Riverside CA

Assignee:

The Boeing Company - Chicago IL

International Classification:

G05F 1565

US Classification:

323275, 323274, 323269

Abstract:

A current control circuit forces current sharing among paralleled power converters. Each power converter has an associated current control circuit, which includes a current amplifier and a coupling circuit. The current amplifier outputs a feedback signal to a voltage regulation error amplifier when the power converter output current falls below a predetermined threshold level. The error amplifier causes an increase in the power converter output voltage, forcing an increase in output current. Therefore, each power converter in a paralleled arrangement is regulated to provide a minimum level of output current, based on a predetermined threshold value.

US Patent:

20100244792, Sep 30, 2010

Filed:

Mar 27, 2009

Appl. No.:

12/413110

Inventors:

STEPHEN J. HULSEY - LOS ANGELES CA, US
STEPHEN RAISER - WIESBADEN, DE

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS, INC. - DETROIT MI

International Classification:

G05F 1/10

US Classification:

323282

Abstract:

Various embodiments provide two-phase boost converters. One two-phase boost converter includes a node configured to be coupled to an input voltage and a transformer coupled to the node. The transformer includes primary and secondary windings, an inductor coupled in series with the primary winding, and an inductor coupled in series with the secondary winding. Another two-phase boost converter includes an inductor configured to be coupled to an input voltage, a node coupled to the inductor, and a transformer coupled to the node. The transformer includes primary and secondary windings, an inductor coupled in series with the primary winding, and an inductor coupled in series with the secondary winding. Yet another two-phase boost converter includes a transformer coupled to first and second external inductors. The transformer includes primary and secondary windings, an inductor coupled in series with the primary winding, and an inductor coupled in series with the secondary winding.

US Patent:

20100320014, Dec 23, 2010

Filed:

Jun 17, 2009

Appl. No.:

12/486601

Inventors:

GEORGE R. WOODY - REDONDO BEACH CA, US
Seok-Joo Jang - Irvine CA, US
Terence G. Ward - Redondo Beach CA, US
Stephen J. Hulsey - Los Angeles CA, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS, INC. - DETROIT MI

International Classification:

B60L 11/00
H05K 5/00
H05K 7/20
B60K 1/00

US Classification:

180 658, 361752, 361689

Abstract:

An automotive power electronics system is provided. The automotive power electronics system includes a support member and at least one electronic die mounted to the support member. The at least one electronic die has an integrated circuit formed thereon comprising at least one wide band gap transistor.

US Patent:

59826444, Nov 9, 1999

Filed:

Dec 16, 1998

Appl. No.:

9/212665

Inventors:

Stephen J. Hulsey - Los Angeles CA
James Lee - Monterey Park CA

Assignee:

Hughes Electronics Corporation - El Segundo CA

International Classification:

H02M 3335
H02M 7538

US Classification:

363 26

Abstract:

A current controlled voltage boost circuit for a high voltage converter. The voltage boost circuit includes a boost converter connected to receive an input voltage and a control signal, and output an increased output voltage to the high voltage converter as a function of a control signal. The circuit further includes a current sensing circuit providing an output voltage proportional to the sensed input current to the high voltage converter. The output voltage from the current sense circuit varies a reference voltage that is compared to the boost converter output voltage by an error amplifier. The error amplifier, in turn, outputs a control signal to the boost converter such that the control signal controls the boost converter output voltage as a function of the input current to the high voltage converter.

US Patent:

55680364, Oct 22, 1996

Filed:

Dec 2, 1994

Appl. No.:

8/348663

Inventors:

Stephen J. Hulsey - Los Angeles CA
George R. Woody - Redondo Beach CA
Ray G. Radys - Santa Monica CA

Assignee:

Delco Electronics Corp. - Kokomo IN

International Classification:

H01M 1046

US Classification:

320 2

Abstract:

A high voltage cable system for use with a contactless battery charging system that charge propulsion batteries of an electric vehicle, and the like. The contactless battery charging system includes a primary power converter coupled to a power source and a secondary power converter located on the electric vehicle that is coupled propulsion batteries of the electric vehicle. The primary and secondary power converters are connected by way of a coaxial power cable. An isolation transformer is coupled between the output of the primary power converter and the coaxial power cable. This transformer allows one of the two outputs of the primary power converter to be connected to ground potential. The isolation transformer improves the safety and reduces electromagnetic interference (EMI) when coupling power to the secondary power converter. The isolation transformer 30 allows for the use of a stepped-up voltage level to be used in the primary power converter, which reduces the amount of current in the coaxial power cable required to deliver power to the secondary converter.

US Patent:

52647765, Nov 23, 1993

Filed:

Jun 30, 1992

Appl. No.:

7/906599

Inventors:

Stephen J. Hulsey - Los Angeles CA

Assignee:

Hughes Aircraft Company - Los Angeles CA

International Classification:

H02J 700

US Classification:

320 2

Abstract:

An inductive charge port for an electric vehicle in which part of the inductive coupling transformer core is attached to the inside of an access door on the vehicle, and wherein only a primary coil assembly is inserted into the charging device when charging the vehicle. The charge port includes a primary coil assembly having a primary winding that is coupled by way of an electrical cable to a power source, and a secondary coil assembly disposed in the vehicle. A housing in the vehicle has the secondary coil assembly disposed therein. The secondary coil assembly includes a transformer core having a first portion disposed in the housing. A secondary winding is disposed in a cavity in the first portion of the transformer core which receives the primary winding therein. A hinged access door has a compressible, resilient member disposed on its inner wall and a second portion of the transformer core is secured to the compressible member. The second portion of the transformer core forms a lid or cap that mates with the first portion to form a complete transformer core.

US Patent:

62292625, May 8, 2001

Filed:

Oct 25, 1999

Appl. No.:

9/426665

Inventors:

Stephen Hulsey - Los Angeles CA
James Lee - Monterey Park CA

Assignee:

Hughes Electronics Corporation - El Segundo CA

International Classification:

H01J 2500

US Classification:

315 9

Abstract:

An anode control circuit for at least two traveling wave tubes powered by a common electronic power conditioner. The anode control circuit has separate anode drive circuits for the traveling wave tubes that are referenced to a voltage that is higher than the cathode voltage being supplied by the electronic power conditioner. A relay between the anode drive circuit and the anode of the traveling wave tube being driven opens or closes a path between the traveling wave tube and the cathode voltage supplied by the electronic power conditioner. The anode drive circuits are referenced to one of the collector voltages that is closest to the anode operating voltage and such that the anode voltage is more positive than the reference voltage.

US Patent:

51629810, Nov 10, 1992

Filed:

May 30, 1991

Appl. No.:

7/707530

Inventors:

James F. Lazar - Thousand Oaks CA
Stephen J. Hulsey - Los Angeles CA

Assignee:

Hughes Aircraft Company - Los Angeles CA

International Classification:

H02M 3337

US Classification:

363 22

Abstract:

A circuit for converting on d. c. voltage to another d. c. voltage including a transformer having a center tap and first and second end leads. A d. c. source voltage is connected to the center tap of the transformer. The end leads are connected to ground through first and second MOSFETs and to the gate of the MOSFET through which the other end lead is connected to ground such that the circuit is nominally self-oscillating due to transformer saturation. Current spikes may be minimized with a control circuit, consisting of an oscillator, a flip-flop, and first and second transistors, connected to the gates of the first and second MOSFETs. The control circuit turns the MOSFETS off prior to their natural oscillation turn off caused by transformer saturation. The circuit is particularly suited to operation with a low voltage d. c. source and low voltage MOSFETS.