Comparison of theories for high-speed linear induction motors

Four leading theories of linear induction motors (LIM´s) are applied to the analysis of test data on the linear induction motor research vehicle (LIMRV). Computer models are exercised to demonstrate the operating regions over which the different finite size effects become significant. Each model is seen to yield a reasonable description of LIM performance within the limitations imposed by the model boundary assumptions. Variations in the predicted LIM normal force and input phase impedance are traced to different treatments of the finite size effects. Flux studies conducted on the LIMRV in the single-sided configuration demonstrate the presence of large phase belt modulation under static conditions.