Choosing Equipment Power Supplies for Rolling Stock Applications

Modern rail vehicles are packed with electronics for communications and control with passengers also increasingly expecting cellular repeaters and Wi-Fi services with ‘clean’ AC mains and USB DC power available at each seat. Because of the environment and the diverse nature of connected equipment, power conversion is becoming increasingly distributed. Each converter that interfaces between the raw DC bus, the train electronics and passengers’ expensive portable devices has to be designed to meet the electrical specification of the bus voltage and also the harsh physical environment of a rail application.

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