Modern drive engineering in electric railroads is characterized today by the use of power electronics. Two systems are available for vehicles in rapid transit systems - such as streetcars, municipal railroads and subways - which are all DC operated: 1. DC chopper control system, in which conventional traction motors of DC series-wound design are controlled by DC chopper, and 2. Three-phase systems in which the traction motor is a three-phase induction machine with a squirrel-cage rotor, fed by a current source DC link converter. The DC chopper system is already in wide use today in rapid transit vehicles, whereas three-phase traction motors are only now coming into service in the first series-produced vehicles. The present paper deals with the circuit arrangements, furnishes data on the reliability of the equipment, and comments on their compatibility with communications and signalling equipment.
Advanced Propulsion Systems with Power Electronics, DC- and AC-Drives for Rapid Transit Systems, Operation Experience
1981-10-01
556799 byte
Conference paper
Electronic Resource
English
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