A dc traction drive is described comprising a synchronous motor, which may be brushless, supplied by a force-commutated voltage-source inverter with thyristor firing controlled by rotor position. This implies control of load angle. An analytical basis for system design is presented, and the required ranges of variation of load angle to obtain motoring and braking operation with forward and reverse rotation are derived. A study of torque production at standstill with very high magnetic saturation yields a design method for synchronous motors used as traction motors in this type of system. New techniques for controlling current and torque are reported, and the performance of the system is demonstrated by test on two experimental drives, the larger of which involves peak currents of 330 amp.

  • Corporate Authors:

    Institution of Electrical Engineers

    Savoy Place
    London WC2R 0BL, NY  England  10016-5997
  • Authors:
    • Chalmers, B J
    • Pacey, K
    • Gibson, J P
  • Conference:
  • Publication Date: 1975-7

Media Info

  • Features: References;
  • Pagination: p. 733-738
  • Serial:
    • Volume: 122
    • Issue Number: 7

Subject/Index Terms

Filing Info

  • Accession Number: 00135172
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Jul 13 1976 12:00AM