Based on tests in laboratories and on German Federal Railways (GFR) trial vehicles type ET 25 as well as on an industrial locomotive type 500 of the Rheinische Braunkohlen AG the subsequent development has been concentrated on the improvement of the power factor lambda and the displacement factor cos phi in four vital stages: 1) introduction of half-control, unsymmetrical half-controlled, and fully-controlled single-phase bridge connection with specially designed control systems; 2) introduction of sequence connection of several half-controlled bridges; 3) optimization of the so far applied connections for major assemblies such as rectifier transformer, rectifier, and smoothing reactor for improving the power factor; and 4) introduction of sector control with self-commutating unsymmetrical bridge for improving the power factor. The design of the control systems and power circuits is demonstrated for each step with the aid of actual constructions. Test results and precalculated theoretical power factor characteristics of the primary line current as function of the speed or Ud/Udo, respectfully, are given. Measurements and calculations, however, showed that the growing concentration of thyristor vehicles may increase the expenditures for railway power supply systems up to approximately 30 percent.

  • Corporate Authors:

    Institute of Electrical and Electronics Engineers (IEEE)

    3 Park Avenue, 17th Floor
    New York, NY  United States  10016-5997
  • Authors:
    • Bezold, K H
    • Forster, J
    • Zander, H
  • Publication Date: 1973-9

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Filing Info

  • Accession Number: 00050479
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 24 1981 12:00AM