DOC《摘要》

摘要 双闭环直流调速系统课程设计 摘要:这份课程设计实现了双闭环直流调速系统的设计,实验结果可以准确直观的观察转速-电流双闭环调速系统的启动过程,可方便的设计各种不同的调节器参数及控制策略并分析其多系统性能的影响,取得了很好的效果.

进一步解决限流问题,唯一的途径就是对电流也实行反馈控制,问题是怎样处理好转速控制和电流控制之间的关系.经过反复研究和实践,终于发现,如果在系统中设置两个调节器,分别调节转速和电流,两者之间实行串联连接,即以转速调节器的输出作为电流调节器ACR的输入,再用电流调节器的输出作为晶闸管触发装置的控制电压,那么这两种调节作用就能互相配合,相辅相成了. 本文利用NATLAB软件中的sinulink组件对直流双闭环调速系统进行仿真,结果表明,应用MATLAB进行系统仿真具有方便,高效及可靠性高等优点. 关键词:双闭环直流调速系统;

不可逆系统;

直流电动机;

MATLAB;

仿真;

课程设计 The course design of dual-closed-loop DC speed regulating system Abstract: this article introduces the course design of dual-closed-loop DC speed regulating system .It can observe the experimental results which provide an access to the precise and direct analysis of motor speed of the dual-closed-loop speed regulating system .Further various regulator parameters and regulating methods can be selected and their effects on the system behaviors can be analyzed .A lot of good results have been gained . Further solves limits flows the question, is the only way also implements the reaction control to the electric current, how the question is processes between the good speed control and the electric current control relations. After studies and the practice repeatedly, finally discovered, if establishes two regulators in the system, adjusts the rotational speed and the electric current separately, Between both implements the series connection, namely by the rpm control output took current regulator ACR the input, uses the current regulator the output to take the thyristor trigger again the control voltage, then these two kind of control action can coordinate mutually, complemented one another. This paper presents the simulation study of a DC speed regulation system by using the Simulink modules .the result indicates that the system simulation by using MATLAB is convenient and highly effective Key words: The course design of dual-closed-loop DC speed regulating system;

Irreversible system;

DC motor;

simulation ;

MATLAB;

course design 目录 一 设计题目

1 二 已知条件及控制对象的基本参数

1 三 设计要求

1 四 设计方法及步骤

1 Ⅰ 用工程设计方法设计

1 (1)系统设计的一般原则…1 (2)电流调节器设计…2 (3)转速调节器设计…5 Ⅱ 用西门子调节器最佳整定法设计

9 (1)电流环的动态校正…9 (2)转速换的动态校正…10 Ⅲ 两种设计方法的分析与比较

11 五 设计心得…11 六 参考文献…12

一、 设计题目: 双闭环V-M调速系统中主电路电流调节器及转速调节器的设计

二、 已知条件及控制对象的基本参数: (1)已知电动机参数为:=3kW,=220V,=17.5A,=1500r/min,电枢绕组电阻=1.25,=3.53.采用三相全控桥式电路,整流装置内阻=1.3.平波电抗器电阻=0.3.整流回路总电感L=200mH. (2)这里暂不考虑稳定性问题,设ASR和ACR均采用PI调节器,ASR限幅输出= -8V,ACR限幅输出=8V,最大给定=10V,调速范围D=20,静差率s=10%,堵转电流 =2.1,临界截止电流 =2. (3)设计指标:电流超调量δ%5%,空载起动到额定转速时的转速超调量δ10%,空载起动到额定转速的过渡过程时间 t0.5.