Analytical Study of Special Linear Motor-Transformer for Wireless Tram

The characteristics of new electromagnetic apparatus with functions of propulsion and non-contact power collection for a future wireless tram are studied analytically. The apparatus operates as a linear motor or a linear transformer. The finite element method (FEM) and the special integral equation method (IEM) are used for the analysis. On the linear transformer, the power transferred to the onboard secondary is quite enough for the rated collecting (or charging) power. The spatial and time average thrust satisfy the rated thrust, although the thrust changes with time because of alternative flux of ground coils.