Patent ID: 6043572
Filing Date: 2000-03-28
Classification: G03F,H02K

Abstract:
A linear motor comprising:a coil for receiving an electrical current; anda first plurality of permanent magnets,wherein said coil and said first plurality of permanent magnets move relative to each other in a direction of relative movement when an electrical current flows through said coil,wherein said permanent magnets are arrayed in the direction of relative movement to form a first array,wherein the direction of polarity of each permanent magnet in said first plurality of permanent magnets is oriented 90.degree. relative to the direction of polarity of an adjacent permanent magnet in said first plurality of permanent magnets,wherein said first plurality of permanent magnets has a main portion and an end portion comprising plural corrective permanent magnets, andwherein each of said plural corrective permanent magnets is smaller than any one of the permanent magnets in said main portion having the same or opposite direction of polarity.