SPINDLE MOTOR

摘要

Disclosed herein is a spindle motor including: a shaft; a bearing receiving the shaft therein to thereby rotatably support the shaft; a bearing holder having the bearing mounted therein; an armature including a core stacked on an outer diameter of the bearing holder and a coil wound around the core; a rotor case having a magnet mounted therein so as to rotate by electromagnetic force with the armature and mounted on an outer diameter of the shaft; and an electromagnet selectively mounted on the armature or the bearing holder so as to face the rotor case, thereby preventing floating or separation of the rotor case by attractive force.