智能开关电源设计毕业论文.doc

本科学位论文 PAGE 35 摘 要 随着电子技术的高速发展，电子系统的应用领域越来越广泛，电子设备的种类也越来越多，电子设备与人们的工作、生活的关系日益密切，而电子设备离不开可靠的电源，各种电子电器设备对稳压电源的性能要求日益增高，稳压电源的智能程度也变得越来越高。 本设计介绍了基于AT89C52单片机的数字化控制的开关稳压电源，以高性能单片机为控制核心，组成数据处理电路，在检测和控制软件支持下，调整和控制开关电源的工作状态。数字化可调稳压电源，输入采用键盘方式，输出电压和限定电流采用数码管显示，稳定性好，精度高，成本低，其性能优于传统的可调直流稳压电源，大大改善了传统的稳压电源的性能，简单易用。 关键词：单片机；开关电源；稳压 Abstract With the rapid development of electronic technology, application of electronic systems becomes more and more widely, types of electronic equipment become much more .Electronic equipment has closer relationship with people’s work and life, and the electronic equipment can not do without reliable power, various electrical and electronic equipment has high performance on power supply requirements, power supply are becoming more and more intelligent. The design introduce digital control of switching power supply based on AT89C52 microcontroller, with the high performance single chip as the control core, make up data processing circuit. With the support of detection and control software, adjust and control the work state of switching power supply, digital control of switching power supply use the keyboard to input, output voltage and limited current use digital tube to display. It has reliable stability, high precision, low cost, its performance is better than traditional adjustable DC power supply,greatly improve the performance of the traditional regulated power supply. It is easy to use. Keyword: single-chip microcomputer; switching power supply; regulators 目 录 TOC \o 1-3 \h \z \u 第1章 引言 1 1.1 研究的目的和意义 1 1.2 国内外研究状况 1 1.3 研究方法及内容 1 第2章 开关稳压电源的原理及实现方法 2 2.1 开关电源的介绍 2 2.2 开关电源的分类 2 2.2.1 DC/DC变换 3 2.2.2 AC/DC变换 3 2.2.3 电路结构 4 2.3 开关式稳压电源的基本工作原理 4 2.3.1 开关电源的控制方式 4 2.3.2 开关式稳压电源的原理电路 4 第3章 硬件设计 10 3.1 方案论证与设计 10 3.1.1 系统整体方案论证 10 3.1.2 控制方法及实现方案 10 3.1.3 提高效率的方法及实现方案 10 3.2 整体设计框图及工作原理 10 3.2.1 整体设计框图 10 3.2.2 整体系统工作原理 11 3.3 开关电源控制电路 12 3.3.1 开关电源主电路图 12 3.3.2 整流滤波初步稳压