试论双闭环直流调速系统性能改善 学位论文.doc

试论双闭环直流调速系统性能改善的根本原因 摘 要 直流电动机具有良好的起动、制动性能，宜于在宽范围内平滑调速，在许多需要调速和（或）快速正反向的电力拖动领域中得到了广泛的应用。近年来，虽然高性能交流调速技术发展很快，交流调速系统已逐步取代直流调速系统。然而直流拖动控制系统不仅在理论上和实践上都比较成熟，目前还在应用；而且从控制规律的角度来看，直流拖动控制系统又是交流拖动控制系统的基础。因此，掌握直流拖动控制系统的基本规律和控制方法是非常必要的。 转速、电流反馈控制的直流调速系统是静、动态性能优良、应用最广的直流调速系统。本文用MATLAB仿真软件对转速、电流反馈控制的直流调速系统进行仿真。 关键词：双闭环控制系统，转速控制环，电流控制环，MATLAB ABSTRACT DC motor has a good start, braking performance, it is appropriate to smooth speed over a wide range, has been widely used in many speed control and (or) fast forward and reverse electric drive field. In recent years, the rapid development of high-performance AC variable speed AC drive system has been gradually replacing the DC speed control system. DC drive control system, however, not only in theory and in practice are more mature, is still used; and from the point of view of the control law, the DC drive control system is the basis of the AC drive control system. Therefore, grasp the basic law of the DC drive control system and control method is necessary.Speed, current feedback control for DC motor static and dynamic performance, the most widely used DC speed control system. Speed, current feedback control for DC motor using MATLAB simulation software simulation. Key words: Double-loop control system, speed control loop, current control loop, MATLAB 目 录 摘要.....................................................2 ABSTRACT.................................................2 一、引言.................................................4 二、直流调速系统.........................................4 三、双闭环直流调速系统的组成.............................5 四、双闭环直流调速系统的性能分析.........................6 （一）、静特性...............….................…....…6 （二）、动态特性.....................…... ..............7 1、起动过程分析..................…................7 2、动态抗扰性能分析.....................…..........9 五、基于MATLAB/SIMULINK的调速系统的仿真及析.............10 小结....................................................9 参考文献................................................9