According to the internal structure, the stepping motor can be divided into two-phase stepping motor, three-phase stepping motor and five-phase stepping motor. Since the cost of five-phase stepping motor is high, it is rare in the market, so the two phases are commonly used. Stepper motor and three-phase stepper motor. Many customers just touch the step, often mistakenly believe that the two-phase stepper motor is 220 volt power supply, three-phase stepper motor is 380 volt power supply, in fact, is wrong. We say that the two-phase three-phase stepper motor is distinguished according to the internal logarithm of the stepper motor, and has nothing to do with the 220 volt 380 volt power supply.