ABSTRACT
This chapter deals with flat linear induction motor (LIM) topologies, double sided and single sided, with their windings and field technical theories accounting for edge, longitudinal end, and skin effects, and with the scope of providing a deep understanding of flat LIMs performance and limitations. It presents analytical expressions for equivalent circuit models of LIMs to be developed and then used to investigate the dynamics and control of LIMs. The dynamic end effect leads to a gradual increase in core flux density along primary length. Though the research on LIMs has started with double-sided configurations, it ended up so far in using single-sided moving primary topologies for transportation in commercial applications. A single-sided LIM for short excursion may use a ladder-laminated core secondary to obtain high efficiency and good power factor for mechanical gaps of less than 1.5 mm. Dynamic end effect in short-secondary and long-primary LIMs has also been studied by analytical field theories but their applications are scarce.
