SYMPOSIUM ON BRAKING SYSTEMS IN RAILWAYS: ELECTRICAL BRAKING APPLIED TO ELECTRIC VEHICLES

SIMPOSIO SOBRE SISTEMA DE FRENADO EN FERROCARRIL: FRENADO ELECTRICO APLICADO A VEHICULOS DE TRACCION ELECTRICA

THE INCREASINGLY FREQUENT USE OF THE ELECTRICAL BRAKE IN RAILWAYS IS MAINLY DUE TO: (1) THE INABILITY OF THE WHEEL TO CONTINUOUSLY DISSIPATE POWER EXCEEDING 30 KW WHICH PLACES A LIMIT OF 160 KM/H TO THE PNEUMATIC SHOE BRAKE ON THE RIM; (2) INCREASED PROTECTION OF THE DRIVING WHEELS WITH THE ELECTRICAL BRAKE; (3) REDUCTION IN WEAR OF THE SHOES. FURTHERMORE AN ELECTRICAL BRAKE HAS THE CAPACITY OF (A) A SERVICE BRAKE TO STOP THE TRAIN AT A GIVEN POINT, (B) A MAINTENANCE BRAKE TO MAINTAIN CONSTANT SPEED WHEN TRAVELLING ALONG A DOWN GRADIENT, AND (C) AN ADDITIONAL BRAKE TO THE PNEUMATIC BRAKE. DETAILS ARE GIVEN OF ELECTRICAL BRAKING SYSTEMS, AND IT IS CONCLUDED THAT SYSTEMS WHICH USE THYRISTORS HAVE BETTER OPERATIONAL CHARACTERISTICS THAN CONVENTIONAL EQUIPMENT BUT THAT THEY ARE HEAVIER AND MORE COSTLY. IN THE SHORT TERM THE TENDENCY IS TO USE DIRECT CURRENT MOTORS WITH CHOPPER EQUIPMENT AND IN THE LONG TERM INDUCTION MOTORS WITH A CONVERTOR. SEE ALSO IRRD ABSTRACTS NOS 106205-7, 106209-13.

  • Authors:
    • Ortiz, A
  • Publication Date: 1976-4

Language

  • Spanish

Media Info

  • Pagination: 55-65
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01298754
  • Record Type: Publication
  • Source Agency: Institut Francais des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)
  • Files: ITRD
  • Created Date: Nov 21 2010 6:51AM