Robert William Becker
Engineers at 262 Bedford Ln, Warrenville, IL

5164624, Nov 17, 1992

Sep 6, 1991

7/754982

Prakash H. Desai - Downers Grove IL
Robert W. Becker - Warrenville IL
Roger M. Boor - Lisle IL
John E. Carter - La Grange IL

General Motors Corporation - Detroit MI

H01L 2332, H05K 720

310 68D

A power semiconductor bridge assembly for an alternator-fed DC power source, including positive and negative parallel spaced DC bus bars and a plurality of disk device phase modules disposed therebetween for interconnecting the bus bars with the alternator phase windings. The modules are mounted within the bus bars so as to facilitate their installation and removal. Each phase module includes a pair of disk-type power semiconductor devices separated by an inner heat sink which is connected to a motor phase winding, and sandwiched between first and second outer heat sinks. The semiconductor devices and various heat sinks are aligned along a mutual longitudinal axis which substantially coincides with a longitudinal axis of the bus bar cavity. The outer heat sinks are staggered or offset along a transverse axis of the cavity such that the first outer heat sink engages the positive DC bus bar, and the second outer heat sink engages the negative DC bus bar. Guide members formed on inner surfaces of the bus bars support the phase modules prior to their connection to the bus bars.

4609862, Sep 2, 1986

Sep 9, 1985

6/774082

Robert W. Becker - Warrenville IL
Timothy A. Keck - Montgomery IL
John E. Madsen - Lemont IL

General Motors Corporation - Detroit MI

H02K 300, H02P 900

322 90

A winding arrangement for a twin winding set three-phase alternator having P rotor poles and 3nP stator slots, where P is an even integer and n is an integer greater than or equal to two, each set of three-phase windings comprising a group of P/2 interconnected winding components per phase. The stator coils each span an odd number of stator slots, and are connected such that circumferentially adjacent coils are connected in different of the sets of three-phase windings, and such that each winding component comprises one or more coils from each of two different pole pitches. As a result, a given stator slot contains winding elements belonging to only one of the sets of three-phase windings, and magnetic coupling between the sets of three-phase windings due to slot leakage is thereby avoided.

5127085, Jun 30, 1992

Apr 1, 1991

7/677912

Robert W. Becker - Warrenville IL
Alexander C. Crosman - Downers Grove IL

General Motors Corporation - Detroit MI

H02H 709

388903

A traction motor drive protection circuit which provides the inverter protection capability of a conventional commutation arrangement, but which limits or eliminates fault currents that stress the internal elements of the alternator and traction machines. A series protection thyristor is connected between a commutation thyristor and the inverter circuit to block motor fault currents, and RC elements are connected in series with the commutation thyristor to limit alternator fault currents. Normal inverter gating is continued in the presence of a fault, to circulate the stored inductive energy and discharge the filter capacitor, providing a "ride-through" operation which is substantially transparent to the traction motor. The RC elements in the commutation circuit not only limit the alternator faul current, and hence the stress on the eommutation thyristor, but also commutate the commutation thyristor to provide automatic reset capability.