Patent ID: 7276821
Filing Date: 2007-10-02
Classification: H02K,H02P

Abstract:
1. A moving magnet type linear slider, comprising: linear guides including sliders for movably supporting right and left sides of a table placed opposite to a fixed base in parallel and guide rails for guiding the sliders; a linear motor for reciprocating the table with respect to the fixed base on the guide rails along a longitudinal direction thereof; and a detector for detecting a relative position between the table and the fixed base, wherein the linear motor includes armatures each having a polyphase armature winding wound around an armature core served as a magnetic circuit and secured to a center of the fixed base, and field permanent magnets each secured to a lower surface of the table in a vertical direction and arranged between an inner side surface of each of linear guides arranged at right and left sides of the table and an outer side surface of the armature via gaps, the linear motor being a suction force offset type, wherein the detector includes a linear scale secured to a lower surface side of the table, and a sensor head secured to an upper surface side of the armature to detect the linear scale, and wherein a central axis of the detector constituted by the linear scale and the sensor head is substantially aligned with a thrust central axis of the armature.