说明：  本文在介绍双闭环PWM直流调速系统原理基础上，根据系统的动、静态性能指标采用工程设计方法设计调节器参数，并运用Matlab的Simulink面向系统电气原理结构图的仿真方法，实现了转速电流双闭环PWM直流调速系统的建模与仿真。
(This paper introduces the principle of double closed-loop PWM dc speed regulation system based on the adopted according to the static and dynamic performance index of system engineering design method to design controller parameter, and using the Simulink of Matlab system oriented electrical principle diagram of the simulation method, has realized the double closed loop speed current PWM dc speed regulation system of modeling and simulation.)