Linear motor driver, has screen against magnetic fields of several permanent magnets, and controller board on U-shaped frame that detects magnetic fields generated by magnetic sensor unit

摘要

The driver has a stator with a coil block (112) on the lower inner side of a U-shaped frame (111), a movable element (120) with several permanent magnets (122) in an armature frame (121), a screening element (123) against the magnetic fields of the permanent magnets and a controller board (130) mounted on an inner wall of the frame that detects magnetic fields generated by a magnetic sensor unit (124) for selective introduction of an electrical current into the coil block.