There are many structural forms and classification methods of stepping motors, which are generally divided into three types according to excitation mode: reluctance type, permanent magnet type and mixed magnet type; According to the number of phases, it can be divided into single-phase, two-phase, three-phase and multi-equivalent forms. The starting frequency characteristic of the stepping motor makes it impossible to reach the operating frequency directly when the stepping motor starts, but there should be a starting process, that is, gradually increasing the speed from a low speed to the operating speed.

Stepping motor is also known as pulse motor. Based on the most basic electromagnet principle, it is an electromagnet that can rotate freely. Its action principle is to generate electromagnetic torque by relying on the change of air gap permeability. Cheap microcomputers appear in a multifunctional manner, and the control methods of stepping motors are more flexible and diverse.