REGENERATIVE DRIVE FOR SUBWAY TRAINS. PART 3: SYSTEM EVALUATION

The most efficient hybrid drive philosophy eliminates high-acceleration power peaking and operates as a fully regenerative system (little or no accumulator top-off during station stop). The optimal accumulator control concept is designed as vehicle velocity dependent and is shown to vary only slightly with vehicle load and station distance. Furthermore, accumulator sizing is numerically determined subject to this control concept. The effect of large coast (5 percent) or cruise periods opposes the justification of any regenerative system and is herein questioned as an integral part of the drive cycle. Conversely, short coast (2 percent) or cruise has little effect on the hybrid drive performance. As a basis of comparison (with other drive systems), the ideal vehicle concept is postulated.

• Supplemental Notes:
  • Presented at the 1976 Joint ASME/IEEE Railroad Technical Conference, Chicago, Illinois, April 6-8, 1976.
• Corporate Authors:

  American Society of Mechanical Engineers

  Two Park Avenue
  New York, NY  United States  10016-5990
• Authors:
  • Flanagan, R C
  • Suokas, L A
• Publication Date: 1976-1

Media Info

• Features: Figures; References;
• Pagination: 5 p.

Subject/Index Terms

• TRT Terms: Braking performance; Electric brakes; Electric power; Electric power conditioning; Electrical systems; Energy conservation; Energy storage systems; Flywheels; Mathematical models; Propulsion; Rapid transit cars; Regenerative braking
• Subject Areas: Energy; Environment; Public Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00131632
• Record Type: Publication
• Source Agency: American Society of Mechanical Engineers
• Report/Paper Numbers: 76-RT-3
• Files: TRIS
• Created Date: May 14 1981 12:00AM