Experiments carried out in cooperation with the German Federal Railway have demonstrated the feasibility of a new form of thyristor control devised by AEG-Telefunken. The effect is to improve the power factor for a thyristor-controlled locomotive, normally between 0.75 and 0.8, to between 0.9 and 0.95. Reactive power is thus reduced by about 50 percent. By addition of a quenching or turn-off circuit similar to those used in chopper control schemes for d.c. traction, the conduction period during which the thyristor is turned on can be arranged to lie centrally within the voltage half-wave, so that current and voltage are more nearly in phase. It is even possible to obtain a leading power factor if this is considered desirable.

  • Availability:
  • Corporate Authors:

    IPC Transport Press, Limited

    Dorset House, Stamford Street
    London SE1 9LU,   England 
  • Publication Date: 1975-11

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00153071
  • Record Type: Publication
  • Source Agency: Federal Railroad Administration
  • Files: TRIS, USDOT
  • Created Date: May 31 1977 12:00AM