基于单片机数控电源设计-毕业设计.doc

CHANGZHOU INSTITUTE OF TECHNOLOGY 毕 业 设 计 说 明 书 题目： 基于单片机的数控电源设计 二级学院： 延陵学院 专 业：电气工程及其自动化 班级： 09电Y4 学生姓名： 戴梦霖 学号： 指导教师： 郭建江 职称： 副教授 评阅教师： 职称： 2013 年 6 月 摘要 随着电子技术的发展，数字电路应用领域的扩展PIC18F4520单片机结合C语言程序设计控制数字电源工作的方式方案，同时结合软硬件优势互补，用数字方法把电源转换模块和电源管理模块集成到芯片中，控制输出电流、输出电压等智能、高效的电压、电流的控制。 本文改进了数字电源的电流采样方式，简化了电路起到了起到了简单易便的作用，并通过单片机内部自带的A/D转换，又帮助节省了其他数字电源所用的A/D转换器，使得该数字电源方便快捷。 关键词：数控电源； 单片机； 电流控制； 电压控制； Abstract With the development of electronic technology, the expansion of the field of digital circuit applications, modern society, the product of intelligent, digital has become a trend for people to pursue much attention, the price of the equipment, performance, development, and good performanceelectronic equipment, first of all can not be separated from the more stable power supply, the higher the power stability, equipment and peripheral conditions superior, longer equipment life. In recent years, the rapid development of power technology, CNC power toward miniaturization, high-frequency, inherit the direction of development, high-precision CNC power has been more widely used. Based on this, the NC power demand is more and more urgent. The development and application of high-performance numerical control constant current devices there is a huge space for development. Improved digital supply current sampling methods, simplifying the circuit played a played a simple will, and through the the MCU internal built-in A / D conversion, but also help save other digital power A / D converter,the digital power quick and easy. Key Word: Digital Power；SCM；Current control ；Program control； 目录 第1章 前言 1 1.1数字电源研究的目的及意义 1 1.2数字电源在国内外的发展趋势 1 1.2.1数字电源D/A转换方法 2 1.2.2数字电源D/A转换现状 3 1.3数字电源A/D转换方法 4 1.3.1全并行A/D转换 4 1.3.2两步型A/D转换 4 1.3.3插值折叠型A/D转换 5 1.3.4流水线型A/D转换 5 1.3.5单片机片内A/D转换 6 1.3.6 数字电源A/D转