文档介绍：2015 届毕业设计说明书直流稳压电源的性能优化电路设计院、部: 电气与信息工程学院学生姓名: 指导教师: 职称实验师专业: 电气工程及其自动化班级: 电气本 1105 班完成时间: 2015 年 6月 11日摘要伴随着电子设备更新的速度越来越快,因而电子设备的工作效率也不断的在提高,所消耗的电能越来越小,体积的减小带来的易携带,安全性能也在不断的提高,并且其操作的简化使得电子设备在广泛的领域得到使用。电子设备的使用肯定离不开电,而电能都是由电源来提供的。现在国家使用的正常电压是 220V ,但是很多的电子设备的正常运作仅仅只要非常小的直流稳压电,因此把 220V 交流电转换成直流电十分重要。而电源是电子设备的电能主要供给部件。其中的直流稳压电源是较为常用到的小功率电器的电源。因为常规的直流稳压电源是通过调节滑动变阻器改变电阻从而达到控制输出电压的数值,这种方法调节的电压值不精准而且使用起来较为麻烦。随着科技的进步智能化的提高对直流稳压电源的优化也势在必行。而优化设计就是采用 AT89C51 单片机通过编程按键和数模转换以及稳压电路来控制电源输出可调的 3V到12V 直流电压。在仿真测试中设计的直流稳压电源输出的直流电压达到了设计的优化要求。关键词: 优化;稳压电源;单片机 ABSTRACT W ith the renewal speed of electronic equipment getting more and more fast , the electronic equipments' working efficiency has been improved a lot. The ease of transport and safety performance brought by the decreasing amount of consumed electric energy and volume have also been improving. Moreover, the simplified operation also leads to the extensive application of electronic equipment. There ’snodoubt that the utilization of electronic equipment cannot do without electric energy, which is all provided by power supply. Nowadays, although the normal voltage is220V in China, only a small amount of DC stabilized supply is needed to enable the normal operation of many electronic equipment. Hence, it isof great importance to convert 220V AC into DC. Furthermore, power supply is the primary supply unit of electronic equipment. And DC stabilized power supply is the supply monly used mini-watt electrical appliances. Since the regular DC stabilized power supply changes the resistance by adjusting and sliding the rheostat, so as to control the amount of output voltage, the voltage adjusted in this method is urate and inconvenient in utilization. With the scientific and technological progress, and the intellectualized improvement, the optimization of DC stabilized power supply is also imperative. AT89C51 single-chip puter is adopted in the optimization design. Through key programming, digital-to-analogue conversion (DAC) and voltag