DESIGN, ANALYSIS AND TEST RESULTS FOR A SUPERCONDUCTING LINEAR SYNCHRONOUS MOTOR

A linear synchronous motor has been designed to propel a 480 km/h magnetically levitated passenger vehicle. The paper describes the motor and presents results of tests which have been performed on essentially full-scale components of the motor using a 7.6 m-diameter test-wheel facility. Controlled starting, acceleration, cruising, deceleration and transient operation have been demonstrated. A 6-component force balance has been used to measure the three forces and three moments acting on a single stationary superconducting magnet due to its interaction with the split 3-phase windings mounted on the rim of the test wheel and energized by a variable-frequency current-controlled inverter power supply. Measured forces and terminal characteristics over complete cycles of force angle are claimed to be in agreement with analysis based on a coupled circuit model of the machine and mutual inductance computations. Moments were measured to be small under all operating conditions. Two modes of control have been demonstrated. The alpha -scheme, proposed for a full-scale system, maintains the angle between induced voltage and phase current at a value which optimizes the motor characteristics, i.e. inverter Mva rating, etc. beta- control, which may be required for starting, uses vehicle position detectors to fire the inverter thyristors at appropriate times.

• Corporate Authors:

  Institution of Electrical Engineers

  Savoy Place
  London WC2R 0BL, NY  England  10016-5997
• Authors:
  • Atherton, D L
  • CUNNINGHAM, J A
  • Dewan, S B
  • Eastham, A R
  • Slemon, G R
  • Turton, R A
• Conference:
  • Institution of Electrical Engineers, Proceedings
• Publication Date: 1977-4

Media Info

• Features: References;
• Pagination: p. 363-372
• Serial:
  • Volume: 124
  • Issue Number: 4

Subject/Index Terms

• TRT Terms: Analysis; Control systems; Cryogenic devices; Intelligent transportation systems; Linear motors; Magnetic levitation; Motors; Superconductivity; Synchronous motors; Tests
• Old TRIS Terms: Advanced systems
• Subject Areas: Operations and Traffic Management; Public Transportation; Railroads;

Filing Info

• Accession Number: 00167563
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Jan 13 1978 12:00AM