The application of traction motors

The application of traction motors is based fundamentally on speed-time curve calculations. This method has been used for many years and is familiar to electrical engineers engaged primarily in transportation activities. Many other engineers infrequently encounter problems of traction-motor application but are not conversant with the effect which variations in service conditions produce on vehicle performance. This paper points out certain recent changes in transportation requirements tending toward greater standardization of equipment, and summarizes the effects of varying operating conditions. The broad basis of economical application is indicated.