人工翻译,请审阅
Stepper motor is an electromechanical component which can convert electric pulse signal into angular displacement or line position,and it has the advantages of easy open-loop control and no cumulative error.However,there are some problems for stepper motor in the applications where high precision is required,such as low-frequency oscillation,high-frequency step-out,etc.,leading to the unstable operation of stepper motor,so the subdivision drive control of stepper motor is proposed.This paper introduces the working principle of four-phase reaction-excited stepper motor,analyzes the advantages and disadvantages of FPGA drive and microcontroller driver,compares the advantages and disadvantages of the principles of PWM subdivision drive circuit and chopper subdivision driver,and proposes using EPGA chip to control the duty cycle of the PWM signal,thereby adjusting the current of each phase of stepper motor.On this basis the forward and reverse rotation,the normal operation and subdivision operation of stepper motor are realized.