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.
Transportation systems: their technical trends
Transportsysteme: Technische Trends
Hitachi Review ; 40 , 4 ; 273-278
1991
6 Seiten, 2 Bilder, 2 Quellen
Aufsatz (Zeitschrift)
Englisch
Pipeline Transportation Trends
British Library Conference Proceedings | 1996
|Engineering Index Backfile | 1968
Trends in earth-to-orbit transportation systems
Engineering Index Backfile | 1963
|TRENDS IN EARTH-PLANETARY SPACE TRANSPORTATION SYSTEMS
AIAA | 1965
|Trends in Earth-to-orbit transportation systems
Engineering Index Backfile | 1963
|