Abstract

Progress in electrical railway vehicles traction systems has mainly been made in the field of main electric circuits, the system has been developed to AVAF (Adjustable Voltage Adjustable Frequency) inverter method from the resister control method via the field added excitation control method. On the other hand, in the 2000s, the study of battery technology applied to railway vehicles as the energy saving technology has started. This report introduces examples of research and development relating to these fields and trends in main circuit and traction system development for railway vehicles.

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