Recent advances in transportation systems have been spectacular. A variable-voltage variable-frequency (VVVF) inverter drive, which applies a large-capacity gate turn-off (GTO) thyristor has been developed to attain higher speed, lighter weight, and a better adhesion of rolling stock. In addition, intelligent cars which incorporate microcomputers in their devices have been developed. Conventional independent ground control systems are being replaced by an integrated autonomous decentralized train operation management system which organically connects related subsystems by a high-speed communication network. For a better mass transportation service, an electric locomotive employing a world-class 6000-kW inverter has been developed. Meanwhile, strenuous efforts have been made to make electric railroad substations extremely compact and automate railroad operations. In the near future, these achievements will be further integrated into new transportation systems of the next generation.


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    Titel :

    Transportation systems: their technical trends


    Weitere Titelangaben:

    Transportsysteme: Technische Trends


    Beteiligte:

    Erschienen in:

    Hitachi Review ; 40 , 4 ; 273-278


    Erscheinungsdatum :

    1991


    Format / Umfang :

    6 Seiten, 2 Bilder, 2 Quellen



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




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