1、 摘 要 转速-电流双闭环直流调速系统结构简单,工作可靠,且设计较为方便,是应用 非常广泛的一种调速系统。经过几十年的发展,双闭环的结构已经基本定型,内环 为电流环,外环为转速环,二者之间实行嵌套。双闭环直流调速系统用了两个调节 器分别调节电流和转速,调节器均采用 PI 型调节器。 双闭环直流调速系统是由晶闸管整流电路、直流电动机、PI 调节器和反馈环节 这几个主要组成部分构成,为了建立双闭环系统的动态数学模型,本文分析了各组 成部分的动态数学模型,最后由这几个部分构成完整的双闭环调速系统的动态结构 图。实际的动态系统结构复杂,不便于分析,本文从工程设计上,将系统进行动态 校正,对校正后的系统
2、,从动态结构图上分析系统的动态性能和抗扰性能。本文详 细的阐述了其静态、动态特性,并进行归纳指出双闭环直流调速系统的优点。 双闭环调速系统的设计关键是设计好调节器的参数,本文详细的分析了调节器 的参数的设计过程,并通过 MATLAB 进行了仿真,验证了双闭环直流调速系统优良 的动态性能和抗扰性。 关键词:双闭环 动态模型 调节器 动态性能 MATLAB 仿真 Abstract A double closed loop of speed loop and current loop DC speed regulation system has the advantages of simple st
3、ructure, reliable work,and its design is more convenient, is a speed regulation system used widely. After decades of development, structure of double closed-loop has been basically finalized, the current loop for inner loop, the speed loop for outer loop, the two loops are implement nested. Double c
4、losed loop DC speed regulating system has two controllers, them are respectively adjusting the current and speed, two regulators uses regulator of PI type. Double closed loop DC speed regulating system is composed of a thyristor rectification circuit, DC motor, PI controller and two feedback links these are several major components, in order to establish the dynamic mathematical model of double closed loop system, this paper analyzes the dynamic mathematical model of these components, these par