LAUSR

In order to reduce the transverse edge effect of a single-sided linear induction motors (SLIMs) for a low-speed Maglev train, this article proposes novel SLIMs with symmetry/asymmetry double-slit secondary. First, the end effects of the conventional SLIMs with flat-solid and cap-solid secondaries are investigated based on three-dimensional (3-D) finite-element model. For the latter one, the influences of slip frequency and secondary structure parameters are obtained as well. Second, the structures of the proposed double-slit secondaries are introduced, and the topology parameters are investigated by a single-variable optimization method. Third, the force performances of SLIMs with proposed two kinds of double-slit secondaries are compared with those of the SLIMs with the traditional cap-solid secondary. Finally, a prototype of SLIM with asymmetry double-slit secondary is manufactured and tested to validate the predictions. The results show that the SLIM with the proposed asymmetry double-slit secondary can improve the force performances due to reduction in the transverse end effect.