基于PLC交流变频调速系统的毕业设计..doc

PAGE X PAGE 25 基于PLC交流变频调速系统的设计 2012年5月 基于PLC交流变频调速系统的设计 Design of Frequency Fonversion Fpeed Regulation System Based on PLC 摘要 近年来，随着电力电子技术、计算机技术、自动控制技术的迅速发展，交流传动与控制技术成为目前发展最为迅速的技术之一，电气传动技术面临着一场历史革命，即交流调速取代直流调速和计算机数字控制技术取代模拟控制技术已成为发展趋势。电机交流变频调速技术是当今节电、改善工艺流程以提高产品质量和改善环境、推动技术进步的一种主要手段。变频调速以其优异的调速和起制动性能，高效率、高功率因数和节电效果，广泛的适用范围及其它许多优点而被国内外公认为最有发展前途的调速方式。而PLC控制技术的引入使得调速控制的快速性，稳定性，准确性方面有了不小的改进。因此，应用PLC控制交流变频调速有着较为广阔的发展前景。本文内容介绍了步进电机以及单片机原理、该系统的硬件电路、程序组成，同时对软、硬件进行了调试。该设计具有思路明确、可靠性高、稳定性强等特点，通过调试实现了上述功能。 关键词: 交流调速系统 变频技术 异步电动机 PLC控制技术  Abstract In recent years, with the development of power electronic technology, computer technology, automatic control technology is developing rapidly, AC drive and control technology has become the most rapidly developing technology, electric drive technology is facing a historical revolution, namely the AC speed regulation to replace DC speed control and computer digital control technology to replace the analog control technology has become the trend of development. Motor AC variable frequency speed control technology is now the electricity saving, improve the process to improve product quality and improving the environment, promoting technological progress and a main means. With its high frequency conversion speed and braking performance, high efficiency, high power factor and energy saving effect, wide applicable range and many other advantages by domestic grandpa think the most promising control mode. While the PLC control technology makes the speed control speed, stability, accuracy, there is not a small improvement. Therefore, the application of PLC control AC drive has a more broad prospects for development. This article introduced the stepper motor and the principle of single-chip computer, the hardware circuit of the system, the program components, while the soft, hardware debugging. The design has the advantages of clear thinking, high reliability, strong stability and other characteristics, the functions are