ABSTRACT
Superconducting magnet linear synchronous motors (SM-LSM) with active guideway have been proposed for magnetically levitated vehicles, at speeds up to 550 km/h so far. This chapter describes the following aspects of SM-LSMs: topologies of practical interest; SM; a technical field and circuit theory of SM-LSM; normal and lateral forces; SM-LSM with figure eight-shape-coil stator; direct thrust and suspension via flux control of SM-LSM. The SM-LSM consists of dc superconducting coils placed on the mover and an active guideway with three-phase air-core cable windings placed horizontally or vertically. The air-core cable three-phase ac windings on ground allow for longer energized sections because the total inductance per section is lower in air. The SM coil leads have to be well cooled by additional tubes and posts in the dewars, to streamline the supply of cooling agents properly stored on board of vehicle.
