SIGNAL INTERFERENCE EFFECTS WITH CHOPPER CONTROLLED TRACTION

Rapid transit and commuter services operated with direct current usually have ac signaling systems that can be adversely affected by chopper propulsion controls that permit regeneration and reduce power consumption. Magnetic or conductive interference mechanisms are now well understood and it should be possible to write a specification that meets signal requirements without excessive increases in costs of propulsion equipment on the train. Tests by London Transport confirm that the solution lies in specifying an adequate input filter, together with fail-safe control and monitoring of frequencies generated by the chopper.

  • Availability:
  • Corporate Authors:

    IPC Transport Press, Limited

    Dorset House, Stamford Street
    London SE1 9LU,   England 
  • Authors:
    • MELLITT, B
  • Publication Date: 1979-11

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Filing Info

  • Accession Number: 00303255
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 30 1981 12:00AM