INDUCTIVE COUPLING FOR TRANSMISSION OF BRAKING SIGNALS IN LONG FREIGHT TRAINS

The tuned, inductively-coupled connector proposed in CIGGT Project 1.17 has been carried to a state of development where it can be considered a viable signal-carrying inter-car connector for long freight trains. The transmission efficiency of the ferrite-cored device is 98 percent, with a useful bandwidth of 100 kHz. Computer simulations of 1 to 100 cascaded couplers, based on an accurate circuit model, and tests on 32 experimental connectors, have demonstrated that 0.1 watts, sufficient to operate a control solenoid, can be delivered to up to 40 cars having simple resistive loads, or up to 100 cars with more sophisticated demand-regulating loads. If the lines can be fed from both ends, as would be possible from mid-train locomotives or a caboose, the number of cars between power sources could conceivably be as large as 80 or 200, depending on the on-board car equipment used. Mechanical and electrical tolerances have been established. The principal recommendation arising from this work is that the connector be field tested in the railway environment.

• Corporate Authors:

  Canadian Institute of Guided Ground Transport

  Queen's University
  Kingston, Ontario K7L 3N6,   Canada 
• Authors:
  • AITKEN, GJM
• Publication Date: 1977-1

Media Info

• Features: Appendices; Figures; References;
• Pagination: 31 p.

Subject/Index Terms

• TRT Terms: Air brakes; Brakes; Braking performance; Electric circuits; Remote control
• Uncontrolled Terms: Electropneumatic brakes; Inductive coupling
• Old TRIS Terms: Brake applications; Trainlines
• Subject Areas: Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00163807
• Record Type: Publication
• Source Agency: Canadian Institute of Guided Ground Transport
• Report/Paper Numbers: CIGGT-77-4 Final Rpt.
• Files: TRIS
• Created Date: Nov 9 1977 12:00AM