《基于PIC的直流电动机PWM调速控制系统设计论文》.doc

基于PIC18F458的直流电动机PWM调速控制系统设计 摘要：当今，自动化控制系统已经在各行各业得到了广泛的应用和发展，而直流驱动控制作为电气传动的主流在现代化生产中起着主要作用。长期以来，直流电动机因其转速调节比较灵活，方法简单，易于大范围平滑调速，控制性能好等特点，一直在传动领域占有统治地位。它广泛应用于数控机床、工业机器人等工厂自动化设备中。随着现代化生产规模的不断扩大，各个行业对直流电机的需求愈益增大，并对其性能提出了更高的要求。为此，研究并制造高性能、高可靠性的直流电机控制系统有着十分重要的现实意义。 本文设计是一套基于PIC单片机的直流电机控制器，作为其配套的试验装置。论文根据系统的要求完成了整体方案设计和系统选型，针对所设计的控制方案对控制系统的软、硬件设计作了详细论述。硬件部分先作了整体设计，然后介绍了以PIC16F458单片机为核心的硬件构成，对键盘电路、测量电路、显示电路等作了详细阐述;软件部分采用模块化设计思想，编制了各个模块的流程图。论述了软件的设计思想和方法;实现了对直流电动机转动参数的设置、启动、停止、加速、减速和显示等功能。利用PIC系列芯片进行低成本直流电动机控制系统的设计，能够简化系统构成、降低系统成本、增强系统性能、满足更多应用场合的需要。 针对直流电机运行环境恶劣、干扰严重的特点，从系统的硬件设计、软件设计等多方面进行抗干扰的综合考虑，并利用多种软件和硬件技术来提高和改善系统的抗干扰能力，有效地提高了系统的可靠性和实用性。 关键词:直流电机，PIC单片机，速度控制 Abstract Nowadays，automatic control systems have been widely used and developed in Every aspect of life. As the artery in the area of electric drive systems DC drives become more and more important in modem Production. For a long time，DC motor has Possessed the main role in the area of electric drive because of its neatly adjustment, simple method and smooth timing in a wide range，besides，its control Performance excellent. DC motor is widely used on the automatic equipments，such as CNC and industrial robot. As the scale of Production becomes larger and larger，the demand and requirements become higher and higher ,so the research on improving the DC controlling system behavior has important sense. This design is a system of DC motor multiple speeds Based on PIC MCU is designed，as its necessary test equipment. It finished the total Project design of system and model selection .The hard ware and software design of the system according to the Preceding solutions are discussed detailed. For the hardware Part after a dissertation on the whole design，the core hardware of the control system is the PIC MCU，the Paper introduced the details of some hardware Problem，including input circuit of keyboard， measure circuit，display circuit and so on .The method of software Planning for it is also discussed. For the software Pa