In this two-part paper, Jean Bouley reviews the history and the merrits of electric braking; Andre Cossie discusses the technology and performance of electric braking systems. Electric braking systems require the traction motors to function as generators. In the "rheostatic" system, the energy so generated is dissipated as heat in resistors. In the "regenerative" system, the energy generated is returned to the power lines. Either ac or dc locomotives can use the rheostatic system; regenerative braking is usable on ac systems, but rarely is substation equipment reversible on dc systems. A great advantage of electric braking at any speed is that it protects the wheels from mechanical and thermal streses. At high speeds and/or heavy loads, electric braking is essential, because the total braking effort could not be absorbed by the wheels with friction braking. A further advantage of regenerative braking is the saving of energy. Another electric brake, the eddy-current brake, utilizes some of the energy generated by the traction motors to induce currents for retardation in the rails. This system is used as an auxiliary, since it must not heat the rails too much. The electric braking systems presently available on S.N.C.F. (French National Railways) are describe in some detail, for both ac and dc systems, with performance curves, for all three electric braking techniques.

  • Corporate Authors:

    Federation des Industries Ferroviaires

    12 rue Bixio
    75007 Paris,   France 
  • Authors:
    • BOULEY, J
  • Publication Date: 1975

Media Info

  • Pagination: p. 57-66
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00129141
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Feb 19 1976 12:00AM