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Electric railroad transformers
Stores power in batteries generated when trains brake; recovered power can be used when the train is under way.
This system uses a heat pipe cooling system filled with pure water; PFCs (refrigerants), a known contributor to global warming are not used.
The system supports heaterless operation down to -20C, and facilitates greater energy efficiency and space-saving.
PFC : Perfluorocarbon
Overall performance of DC electromotive systems enhanced by means of DC electromotive voltage control with PWM converter that uses IGBT.
(Used by Tsukuba Express.)
PWM : Pulse Width Modulation
IGBT : Insulated Gate Bipolar Transistor