MAGNET ARRAY FOR MOVING MAGNET PLANAR MOTOR

摘要

A stage mover for moving a stage relative to a stage base includes a conductor assembly and a magnet assembly. The conductor assembly is coupled to the stage base and a plurality of coil units with each coil unit having one or more coils. Each of the coils has a coil width. The magnet assembly interacts with the conductor assembly and includes a plurality of spaced apart magnet arrays. Each of the magnet arrays is spaced apart from each adjacent magnet array by an array gap that is at least equal to the coil width so that independent and symmetric magnetic flux distribution can be achieved for each of the magnet arrays.

主权项

1. A stage mover for moving a stage relative to a stage base, the stage mover comprising:
a conductor assembly that is coupled to the stage base, the conductor assembly including a plurality of coil units with each coil unit having one or more coils, each of the coils having a coil width; and a magnet assembly that coupled to the stage and interacts with the conductor assembly, the magnet assembly including a plurality of spaced apart magnet arrays, wherein each of the magnet arrays is spaced apart from each adjacent magnet array by an array gap that is equal to or greater than the coil width.