Patent ID: 9093890
Filing Date: 2015-07-28
Classification: H01J,H02K

Abstract:
1. A linear motor comprising: a stator including a first yoke made of ferromagnetic substance and having an open face and two rows of permanent magnets linearly arrayed inside the first yoke so that S-poles and N-poles are alternate; and a moveable element arranged between the two rows of permanent magnets and linearly movable in a moving direction; the stator is constructed by connecting a plurality of separated stators along with the moving direction of the movable element; the two rows of permanent magnets are provided from an opening face of the open face of the first yoke and spaced apart from each other in a direction perpendicular to the moving direction of the movable element; a second yoke made of ferromagnetic substance and in a form of two stick-shaped members and/or a plate member in a square shape surrounding an entire periphery of an open end of the first yoke and provided along the connecting direction of the separated stators, wherein the stick members and/or the plate member and the two rows of permanent magnets are provided to face each other at the open end of the first yoke selectively to provide a smaller opening space than the opening space of the open face of the first yoke, in a direction perpendicular to the moving direction of the movable element, wherein the first yoke and the second yoke are connected by an adhesive connecting member, or a magnetic force from each other.