Technical Reports

Design and Testing of a 12,000 KVA Linear Induction Motor and Power Converter

  • 01
  • Jun
  • 1977
AUTHOR: G. Kalman, J. Colmery, R. Day, S. Mitchell
SUBJECT: Technology Transfer
KEYWORDS: Linear Induction Motor, Ground Transportation, Propulsion System, Power Conversion
ABSTRACT: This report presents pertinent technical data on the design, development, fabrication, and testing of the linear induction motor propulsion system (LIMPS). The LIMPS is designed to convert constant-voltage, constant-frequency, 3-phase, 60-Hz, 8250-V, wayside electrical power to a variable-voltage, variable-frequency output, to power an integral linear induction motor capable of providing to 33,300 N (7600 lbf) propulsive thrust at speeds up to 134 m/s (300 mph). The LIMPS produces continuously variable thrust in the forward and reverse directions, and includes such features as automatic startup, regenerative braking, and automatic failure/ malfunction detection and shutdown. Further, the system incorporates high-voltage, water-cooled components to achieve a power density of more than 0.67 kW/kg (0.3 kW/lb). The LIMPS program comprised three major phases: design/development, static test, and field test. This report describes the events and results of each program phase. Measured performance results are compared with theoretical results for field test data obtained during pulsed-mode tests, start-to-run-mode transition tests, low-speed braking tests, reaction rail temperature-rise tests, and LIMPS influence on the wayside power system tests.