一种脉宽调制式步进电机驱动源

A PWM Stepping Motor driving Circuit

利用8098单片机的脉宽调制(PWM)输出的特点,控制大功率晶体管模块GTR的导通与关断比,升频升压,从而使步进电机绕组中的电流保持不变,绕组中电流波形好,提高了步进电机的特性。本驱动源最大相电流可达20A。

Using 8098 PWM output to control the on/of ratio of GTR.a stable current in stepping motor wind can be obtained. It can raise the performance of stepping motor. This driving circuit can reach the maximum phase current of 20A.