STEP MOTOR

摘要

PURPOSE: A step motor is provided to increase an external diameter of a magnet and enhance the output of the step motor by arranging the magnet at the outside of a stator. CONSTITUTION: A step motor includes a shaft(51), a stator(70), and a rotor(60). A plurality of bearings(55,56) are formed around the shaft(51). The stator(70) is installed between the bearings(55,56). The rotor(60) is installed at one side of the shaft(51) to an outer circumference of the stator(70). The rotor(60) is rotated by the mutual action between the rotor(60) and the stator(70). The stator(70) is formed with a stator body(71), a plurality of coils, and a plurality of inner pole pieces(72-75). The stator body(71) is installed around the shaft(51). The coils are installed around the stator body(71). The inner pole pieces(72-75) are installed at both sides of the coils.