摘  要：直流电机具有良好的起、制动性能，能在大范围内平滑调速，因而在可控的电力拖动等领域中得到了广泛的应用。用数字方法实现无刷直流电动机的PWM调速是大势所趋，文中提出了一种采用基于数字处理芯片的数字控制系统来提高直流调速系统的控制性能。
关键词：直流电机；数字方法；PWM; 控制系统

Abstract: DC Motor has a good performance on starting and braking，can control speed smoothly in a large range,thus it has been widely used in the field of controllable electric drive.Using digital method to realize PWM speed control of brushless DC motor is a general trend,in order to improve the control performance of DC speed regulating system,a digital control system based on digital processing chip was proposed in the paper.
Key Words: DC Motor;Digital Method;PWM;Control System