摘要：现如今，电源应用于日常生活的各个领域。小到孩子们娱乐的玩具汽车，大到国家的军工、航空航天，都离不开一个可靠高效的电源。电源的发展史已有200多年，从最初的化学电池到光伏发电，每一次发明都是电力电子技术发展的巨大进步。但是，随着各个工业的发展，对电源要求也在逐步提高。电源的体积和稳定性也越来越得到了重视。现在的电源主要分为线性电源和开关电源两大类。前者的输出电压稳定，但体积大，效率低；后者的体积小效率高，但是输出电压中带有谐波。在对数字式稳压电源的设计中，主要结合了单片机，数模转换器和传统的线性稳压电路，目的是使稳压电路的输出更加稳定，并且输出电压可调而且能够实时显示在数码管上。并且利用了proteus软件来搭建电路图并进行仿真和调试。71804

毕业论文关键词： AT89C52；DAC0832；稳压电源；单片机编程；proteus

The design of digital stabilized voltage supply based on proteus

Abstract：Nowadays, power sources are used in many fields of daily lives. Nothing can exist without a reliable and effective power, which include toy vehicles played by children and military project and aerospace made by each country. The development of power supplies has a history of over two hundred years. From the initial chemical batteries to the photovoltaic power generation, each invention is a kind of great progress to the development of power electronic technology. However, the requirement of power is improved again and again with the progress of each industry. Meanwhile, the size and stability of power sources are put more emphasis. The general power sources are classified into linear power supplies and switching power supplies. The first of two mentioned has better stability, but with huge size and terrible efficiency; the other one owns little size and good efficiency, but there are harmonic waves in its output voltage. Single chips, digital analog converters and traditional linear power supplies are used in the design of digital voltage-stabilized source. The aim is to make the output voltage of voltage-stabilized source much more stabilized than before and its output voltage can be adjusted and need to be shown on the Nixie tube at the same time. With the help of the software called proteus, the circuit diagram can be designed and simulated on it.

Key Words: AT89C52；DAC0832；voltage-stabilized source；the programming of single chips；proteus

目录

绪论1

1.1选题背景及意义1

1.2国内外研究发展现状2

1.3主要研究内容和论文结构3

1.3.1主要研究内容…3

1.3.2论文结构…3

2 设计思路…5

2.1 设计要求…5

2.2 初始设计…5

2.3 改进设计…5

3 设计中的相关技术…7

3.1整流技术…7

3.2 单片机中的编程9

3.2.1 AT89C52的组成及内部结构…10

3.2.2 AT89C52的引脚及作用…11

3.3 数模转换技术 12

3.3.1 DAC0832的特点13

3.3.2 DAC0832的组成及内部结构…13

3.3.3 DAC0832的引脚及作用…14

3.3.4 DAC0832的工作状态15

3.4 在proteus中设计稳压电源所用到的技术 16

3.5 本章小结 16

4 总体方案设计 18

4.1 晶振电路 18

4.2 复位电路 18

4.2.1 复位电路的原理… 19

4.2.2 复位电路在proteus中的设计及调试 19

4.3 电流信号-电压信号转换电路20

4.3.1 电流-电压转换电路原理20

4.3.2 电流-电压转换电路在proteus中的设计…21

4.4 AT89C52与DAC0832的引脚接线 21