Comparison of two types of PM linear synchronous servo and miniature motor with air-cored film coil

Permanent-magnet linear synchronous motors (PMLSMs) with air-cored film coil are applied to servo, miniature, and precision motion-controlled linear machines. On the basis of analytical field solutions, this paper deals with the comparison of the design guidelines, magnetic field, winding electromotive force, required magnet volume, optimal winding thickness, and thrust force for two types of permanent magnet movers.