Patent ID: 10103660

Abstract:
The present invention provides an actuator including a motor; a lead screw rotating by coupling to the motor; a nut part moving forward or backward by coupling to the lead screw; a magnet coupled to the nut part; a sensor unit configured to sense a change amount of magnetic flux depending on a position of the magnet and convert the sensed change amount of magnetic flux into measured voltage data; and a control unit controlling the motor; wherein the magnet comprises a first pole and a second pole arranged in order in the movement direction of the nut part, wherein, if the sensor unit senses the first pole when the nut part is moved forward, the control unit performs a first motion in which a forward movement of the nut part is stopped and moves the nut part backward, and if the sensor unit senses the second pole after the first motion, the control unit performs a second motion in which the movement of the nut part is stopped and moves the nut part forward.