基于晶闸管的直流电机调速系统与仿真毕业论文.doc

沈阳航空航天大学北方科技学院毕业设计（论文）  PAGE IV 摘 要 自动调速系统主要包括直流调速系统和交流调速系统。在高性能的拖动技术领域中，相当长时期内几乎都采用直流电力拖动系统。此外，建立在反馈控制理论基础上的直流调速原理也是交流调速控制的基础。直流调速是指人为地或自动地改变直流电动机的转速，已满足工作机械的要求。从机械特性上看就是通过改变电动机的参数或外加电压等方法来改变电动机的机械特性，从而改变电动机机械特性和负载机械特性的的交点，使电动机的稳定运转速度发生变化。 运动控制系统中应用最普遍的是自动调速系统。直流调速系统的控制方式包括，开环控制-按给定值操纵，开环控制—按干扰补偿，闭环控制系统—按偏差调节，复合控制系统。本文着重对晶闸管电动机调速系统的开环工作机械特性，单闭环有静差和无静差工作的系统静特性，双闭环机械特性和该系统闭环控制特性进行试验研究。并应用MATLAB软件对系统模型进行了仿真研究。 关键词：直流电机调速；开环；单闭环；双闭环；MATLAB仿真 Abstract Automatic speed control system includes AC variable speed DC drive system and the system. Drag in the high-performance technology, the relatively long period of time almost all the DC electric drive system. In addition, based on feedback control theory based on the principle of DC Speed Control Speed Control is the basis of the exchange. DC converter is artificially or automatically change the speed of DC motor has to satisfy the requirements of mechanical work. Judging from the mechanical characteristics of the motor is by changing the applied voltage and other parameters or methods to change the motors mechanical properties, thereby changing the motor characteristic and load mechanical characteristics of the intersection, the stable operation of the motor speed change. Control System is the most common is the automatic speed control system. DC speed control system of control methods including, open loop control: control by a given value, open loop control: according to disturbance compensation, closed-loop control system: by bias adjustment, complex control systems. This paper focuses on the SCR motor speed control system of open-loop mechanical properties of the work, single loop with static error and poor working system with no static static properties, mechanical properties and the double closed-loop system closed-loop control characteristics were tested. And apply the MATLAB software system model was simulated. , Keywords: DC motor speed; open loop; single loop; double loop; MATLAB simulation 目 录  TOC \o 1-