It mainly relies on the interaction between the stator and the rotor, and generates a rotating magnetic field by controlling the flow of current, thereby driving the rotor to rotate. The structure of a two-phase stepper motor includes a stator and a rotor, in which the stator is usually made of laminated silicon steel sheets and has four magnetic poles, which are 180 degrees apart in space. The rotor is a two-pole rotor with an N pole and an S pole.