Technical Reports

Performance of a Linear Synchronous Motor with Laminated Track Poles and with Various Misalignments

  • 01
  • Sep
  • 1980
AUTHOR: William R. Mischler, Thomas A. Nondahl
SUBJECT: Facilities & Test Equipment
KEYWORDS: Linear Electric Motors, High Speed Ground Transportation, Train Performance
ABSTRACT: A test facility was designed and built to measure the performance of a single-sided high speed homopolar Linear Synchronous Motor with laminated pole pieces over a wide range of frequency and excitation levels. The facility was instrumented to measure performance at the machine terminals, flux density in the air gap and machine, and forces in all six axes. The machine was tested under nominal conditions and with perturbations in five degrees of freedom: air gap, lateral, pitch, roll, and yaw. Equivalent circuit parameters and flux form coefficients were measured and compared to design values. Poor correlation forced a revision of the design programs. The modeling of the finite interpolar gap and interpolar leakage flux led to good agreement between test and revised design values. The test data show a high power factor, the absence of end effects, and a strong tendency of the machine to remain properly aligned relative to the track, with the exception of a destabilizing pitch torque.