A modular design of asynchronous traction drive

It has been generally acknowledged that microprocessor and gate turn off thyristor (GTO) technology has made a major contribution to the advancement of variable voltage variable frequency (VVVF) inverter drives. Particular benefits include supply harmonic control and the avoidance of chopper stabilisation for DC supply systems. The authors describe one approach to the design of such a system which was intended to be applicable to locomotives, electric multiple units, and even light rail vehicles. The design is structured so that any required system can be constructed from a standard set of parts. These are then assembled into a single unit as required for the application