文档介绍：机电综合应用
题目: 基于单片机的直流可调电源的设计
系部名称: 信息工程系专业班级: 电气自动化
学生姓名: 学号:
指导教师: 教师职称:
2011 年 12 月 27日
摘要
现实的生活和实验中,常常要用到各种各样的电源,电压要求多样。如何设计一个电压稳定,输出电压精度高,并且调节范围大的电压源,成了电子技术应用的热点。在市面上,各种电源产品各式各样,有可调节的和固定的。但是普遍存在一些问题,如转换效率低,功耗大,输出精度不高,可调节范围过小,不能满足特定电压的要求,输出不够稳定,纹波电流过大,并且普遍采用可调电阻器调节,操作难度大,易磨损老化。
本设计以单片机为核心,设定输入交流电压为220v±10%,使用按键设置电压,触动后,调节滑动变阻器控制输出电压在0~13V连续可调。显示设定电压和测量电压,,显示方式LCD液晶显示。
在确定了系统总体设计方案的基础上,选择了合适的芯片,并进行硬件电路设计,系统软件设计。同时利用Protel 99 SE绘制出系统原理图。在此基础上也在软件编程环境Keil C51 下进行了软、硬仿真,和仿真结果也验证了本问的正确性和实用性。
关键字:TLC1543,单片机STC89C52,稳压电源
Adjustable DC Regulated Switching Power Supply Base On Single-chip puter
Abstract
In real life and experimental, often use a variety of power supply, voltage requirements, and diverse. How to design a voltage stability, high output voltage accuracy, and adjust the range of voltage sources, into a hot spot of electronic technology application. In the market, various power supplies product variety, with adjustable and fixed. But there are mon problems, such as the low conversion efficiency, power consumption, output accuracy is not high, adjustable range is too small and does not meet the requirements of a specific voltage, output stable enough, excessive ripple current and generally adjustable resistor is used to regulate, the operation difficult, easy to wear and aging.
In single-chip at the core of this design, set the input AC voltage is 220V ± 10%, using the keys set voltage, after touching, sliding rheostat controlled output voltage regulation in 0~13V adjustable. Display set voltage and measuring voltage, precision as displayed is , liquid crystal display LCD display.
On the basis of confirming the overall design plan of the system, choosing the suitable chips to do the hardware circuit designing and the software designing. And so T painted the schematic diagram with Protel 99 SE. On this basis, the software and hardware simulated in the software programming environment Keil C51,and the simulation results are illustra