Electric propulsion and braking system for automotive vehicles
An electric propulsion and braking system which includes a plurality of high-speed, dc commutatorless motors each coupled to a wheel of an automotive vehicle through an associated fixedratio mechanical transmission. Each motor includes a field winding, an armature winding, and a commutation circuit for the armature winding. During propulsion, each commutation circuit is enabled and, during braking, each commutation circuit is disabled. Control of the amount of propulsion and braking is afforded by varying the dc source voltage across each commutation circuit and by varying the field current in each field winding. The dc source voltage across each commutation circuit is varied by connecting the commutation circuits and a plurality of main electrical energy sources in selected series, series/parallel, and parallel combinations. The field current in each field winding is varied by connecting the field windings with an auxiliary electrical energy source in selected series, series/parallel and parallel combinations, and by duty-cycling the selected combination. The various series, series/parallel and parallel combinations are selected by, and the duty-cycling of the selected field winding combination is controlled by, a microprocessor receiving signals representing the magnitude of electrical energy transfer between the main electrical energy sources and the motors, the position of an acceleration pedal, the position of a brake pedal, the velocity of the vehicle, the dc source voltage across each commutation circuit, and the armature voltage across each armature winding.
- Assignee:
- EDB-83-058388
- Patent Number(s):
- US 4363999
- OSTI ID:
- 6529143
- Resource Relation:
- Patent File Date: Filed date 14 Jul 1980; Other Information: PAT-APPL-168172
- Country of Publication:
- United States
- Language:
- English
Similar Records
Guideway structural design and power/propulsion/braking in relation to guideways. Volume 1. Final report. Report for August 1991-January 1993
Guideway structural design and power/propulsion/braking in relation to guideways. Volume 3. Appendix B. Maglev guideway structural design. Final report, August 1991-January 1993