Positional sensor for linear stepper motor, uses remenance stabilizer to stabilize remenance value on stator of linear stepper motor

摘要

A position sensor for a linear stepper motor, has a magnetic sensor (20) which detects the change of magnetic flux density of the stator (30) by the magnetic induction principal and provides a location feed-back value. A remenance stabilizer (10) encloses the magnetic sensor (20) and serves to stabilize the remenance value on the stator (30) of the linear stepper motor, and in which the magnetic sensor (20) determines the position of the stator (30) of the stepper motor by the change in amount of magnetic flux.