基于单片机.可调直流稳压电源设计说明书.doc

广东交通职业技术学院 PAGE2 / NUMPAGES2 word完美格式 精心整理 学习帮手 毕 业 设 计 论 文 题 目：单片机控制可调直流稳压电源的设计 姓 名： 学 号： 专业班级： 2013/12/1 广东交通职业技术学院  内容摘要 本文介绍了一种基于单片机的直流稳压电源设计方案，该系统由初步整流稳压部分、单片机控制部分、DAC、稳压部分和显示部分组成。该稳压电源可步进调节、实时显示，弥补了传统稳压电源的不足，其核心技术是通过单片机控制数模转换来改变其后稳压模块的输出。利用单片机控制数模转换芯片DAC0832输出电压作为稳压电路的参考电压；单片机通过键控改变DAC0832的输出电压，作为参考电压发生改变，稳压电路调整管的压降也会相应地发生变化，从而改变输出电压 。 目录 1. 引言·····························································4 2. 设计任务及要求···················································4 2.1设计目的····················································4 2.2设计内容····················································4 3．电源设计方案及论证··············································5 3.1设计方案分析················································5 3.2 D/A数字模拟转换模块········································6 3.3稳压模块····················································6 3.4 按键控制模块················································7 3.5显示模块····················································7 3.6 电源模块····················································7 4．电源系统硬件介绍················································7 4.1 单片机模块··················································7 4.1.1单片机介绍··············································7 4.1.2 单片机外围电路介绍·····································9 4.2 D/A模块····················································10 4.2.1 DAC0832工作原理·······································10 4.2.2 DAC0832及其外围电路···································11 4.2.3 D/A 转换的计算·········································12 4.3 LED数码管显示模块··········································14 4.3.1数码管结构·············································14 4.3.2数码管工作原理·········································14 4.3.3数码管连接电路图·······································15 4.4直流电源···················································15 4.4.1整流滤波、初步稳压·····································15 5. 电源硬件电路仿真图································