SOLID-STATE TRACTION CONTROLS AT THE ECONOMIC POINT OF BALANCE

Gate turn-off thyristors (GTOs) became available as high-power devices in the 1970s, opening the way for ac traction motors on commuter cars drawing current for a dc power supply. While earlier the Japanese transit properties had turned to choppers as a means of energy conservation on all-dc equipment, it was determined that if the interval between train stops exceeds 3 km, the extra weight and cost of full-series choppers cannot be justified. It is only if most braking energy can be recovered through regeneration that choppers can pay for thermselves. The author observes that the most promising developments in electrical power conditioning for electric multiple-unit cars are the high-frequency armature chopper using GTOs and and an ac system GTO inverters. With solid-state power controls now highly refined, Japan's Ministry of Transport is sponsoring the development of a small-profile rail transit system with linear-motor propulsion with present work based on Hitachi technology. A test track operation is presently under test.

• Availability:
  • Find a library where document is available. Order URL: https://www.library.northwestern.edu/find-borrow-request/requests-interlibrary-loan/lending-institutions.html
• Authors:
  • Sone, S
• Publication Date: 1985-6

Media Info

• Features: Figures; Photos; Tables;
• Pagination: 4 p.
• Serial:
  • Railway Gazette International
  • Volume: 141
  • Issue Number: 6
  • Publisher: DVV Media Group
  • ISSN: 0373-5346
  • Serial URL: http://www.railwaygazette.com/about-us.html

Subject/Index Terms

• TRT Terms: Alternating current motors; Chopper circuits; Development; Direct current motors; Electric multiple unit cars; Electric power conditioning; Linear motors; Rapid transit cars; Research; Technology; Thyristors; Traction drives
• Uncontrolled Terms: Research and development
• Geographic Terms: Japan
• Old TRIS Terms: Choppers; Linear electric motor
• Subject Areas: Public Transportation; Research; Vehicles and Equipment;

Filing Info

• Accession Number: 00399824
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 30 1985 12:00AM