【摘要】 在利用电机作为动力源的场合,直流电动机的调速是一个必须考虑的问题。脉宽调制(PWM)调压法是常用的方法之一,本文利用PCI-1780定时计数卡产生PWM信号,通过LabVIEW编程实现对占空比的改变,再经过驱动器控制直流电动机改变速度。该方法调节简便,充分利用软面板实现直流电动机的调速。更多还原

【Abstract】 When the electric motor being used as driving force,the speed regulation of the DC motor is a problem to be considered. The regulation of PWM is one of the common ways. In this paper,the signal of PWM is produced by PCI-1780.The ratio of hold to empty is changed by LabVIEW programing,then the speed of DC motor can be changed.This way is simple. It makes use of the front panel to regulate the speed of the DC motor.更多还原