文档介绍：湖北民族学院
毕业论文(设计)
基于双闭环控制的直流电机调速系统设计
学生姓名: 学号: 030940730
系别: 电气工程系专业:电气工程及其自动化
指导教师: 评阅教师:
论文答辩日期 2013-05-25
答辩委员会主席
摘要
伴随科学技术的迅猛发展,电动机有关的控制技术发展也与时俱进,电动机的运用领域在现实生活中的许多领域,也起到了不可或缺的作用。而其中直流电机更是凭借它快速的反应度、精准的调速性能、极低的功耗和宽阔的调速范围等优点在整个调速控制系统中独占鳌头。
在直流电动机控制调速系统中,开环性能指标差,为此有必要对这些性能进行修正改善,经过大量的研究和实践证明,可采用闭环调速系统。对于调速性能要求一般的场合,采用单闭环控制系统,而对调速指标高的,则采用多闭环系统[1]。根据引回的反馈量的性质可大致分为电压反馈,电流反馈,转速反馈等。在双闭环系统中****惯采用电流、转速闭环控制。采用双闭控制调速系统可以做到无差调节,且性能优越,尤其在很多高精尖技术中运用广范,这使得对它的研究具有很高的现实意义。
本文首先论述直流调速系统的现状和背景,讨论研究该系统的重要意义,然后,对双闭环调速系统进行理论分析,最后,在理论研究的基础上,根据要求的数据参数,设计出合理的双闭环直流调速系统。理论上完成系统设计后,将对所设计的系统进行MATLAB仿真,得出仿真结果,并分析所得结果与理论值的异同,找出系统中不合理的环节和参数,进行校正和必要的处理,并最终得出符合要求的系统模型。为突出该系统的优、缺点,将会对双闭环直流调速系统与其它调速系统(开环调速系统和单闭环调速系统)进行比较。
关键词: 稳态性能,直流电机,双闭环,静差,MATLAB
ABSTRACT
Along with the rapid development of science and technology, related to motor control technology development is also advancing with The Times, the motor application in many fields in real life, it also plays an indispensable role. And the DC motor is relying on its quick response and accurate performance of speed and low power consumption and wide speed range, etc in the speed regulation control system.
In a DC motor speed regulation system, open loop performance is poor, therefore it is necessary to be revised to improve the performance of these, after a lot of research and practice has proved, can adopt the closed loop speed regulation system. For speed control performance requirements in general situation, adopt single closed loop control system, and high speed control indexes, the multi closed loop system. Habit in the double closed loop system, using current and speed closed loop control. Speed control system with double closed control can be done without adjustment, and superior performance, especially in many advanced technology used in broader range, this makes the study of it has high practical significance.
First of all, the paper discusses the present situation of DC speed regulating system and background, researchin