Patricia O O'Donnell

US Patent:

58314091, Nov 3, 1998

Filed:

Feb 28, 1997

Appl. No.:

8/808354

Inventors:

Frank A. Lindberg - Baltimore MD
David L. Schantz - Ellicott City MD
Brian H. Smith - Arnold MD
Charles S. Kerfoot - Pasadena MD
Joseph J. Springer - Bel Air MD
Patricia A. O'Donnell - Davidsonville MD
James H. DeOms - Glen Arm MD
Ronnie L. Starling - Columbia MD
Michael J. Ankrom - Baltimore MD
James L. Munro - Severna Park MD
Geoffrey B. Lansberry - Bowie MD
Beth A. Herman - Columbia MD
William B. Hall - Annapolis MD
Marshall G. Jones - Joppa MD
William B. Winkel - Bowie MD
Brian A. DeAbreu - Bowie MD
Thomas C. Underwood - Laurel MD
Todd M. Zaranski - Baltimore MD
Aaron D. Valdivia - Woodstock MD
Richard M. Young - Millersville MD
Frank E. Altoz - Baltimore MD
Ngon B. Nguyen - Jessup MD
Eric L. Mohler - Annapolis MD

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

H02H 07122

US Classification:

318801

Abstract:

An electric vehicle propulsion system having a motor with first and second electrically isolated windings and a system control unit for controlling the motor, wherein the system control unit includes a first power bridge for driving the first windings and a second power bridge for driving the second windings.

US Patent:

56342624, Jun 3, 1997

Filed:

Jun 9, 1995

Appl. No.:

8/489092

Inventors:

Patricia A. O'Donnell - Davidsonville MD
Charles S. Kerfoot - Pasadena MD
Joseph J. Springer - Bel Air MD

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

H01F 706
H01F 2710

US Classification:

29606

Abstract:

An easy to assemble transformer for use in an electronics module of an electric vehicle. The transformer can be assembled from the "top down," thus alleviating the need to build the transformer as a subassembly unit. During manufacture of the transformer, windings are wound onto a thermally conductive coil form. Next upper and lower E-shaped core members are inserted into openings in the top and bottom of the form so that the side legs and the center legs of the E's touch and are in alignment. The thermally conductive coil form has a portion that touches a cold plate when the transformer is mounted on the cold plate. The transformer is further secured to the cold plate by a mounting bracket.

US Patent:

55811710, Dec 3, 1996

Filed:

Jun 10, 1994

Appl. No.:

8/258154

Inventors:

Charles S. Kerfoot - Pasadena MD
Patricia A. O'Donnell - Davidsonville MD
David L. Schantz - Ellicott City MD

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

H02J 704

US Classification:

320 50

Abstract:

An on-board electric vehicle battery charger includes a surge limiter circuit, a power factor control circuit, and a resonant inverter circuit. The power factor control circuit includes a boost regulator circuit providing a fixed voltage on an output capacitor. The resonant inverter circuit uses a resonance capacitor and the leakage inductance of an output transformer to establish a resonance frequency at least 500 times the AC input power frequency.

US Patent:

54691249, Nov 21, 1995

Filed:

Jun 10, 1994

Appl. No.:

8/258141

Inventors:

Patricia A. O'Donnell - Davidsonville MD
Charles S. Kerfoot - Pasadena MD
Joseph J. Springer - Bel Air MD

Assignee:

Westinghouse Electric Corp. - Baltimore MD

International Classification:

H01F 2710
H01F 2726

US Classification:

336 61

Abstract:

An easy to assemble transformer for use in an electronics module of an electric vehicle. The transformer can be assembled from the "top down," thus alleviating the need to build the transformer as a subassembly unit. During manufacture of the transformer, windings are wound onto a thermally conductive coil form. Next upper and lower E-shaped core members are inserted into openings in the top and bottom of the form so that the side legs and the center legs of the E's touch and are in alignment. The thermally conductive coil form has a portion that touches a cold plate when the transformer is mounted on the cold plate. The transformer is further secured to the cold plate by a mounting bracket.