毕业设计数控直流稳压电源摘要本设计以直流电压源为核心，AT89C51 单片机为主控制器，通过按键来设置直流电源的输出电压，设置步进等级可达 0.1V，输出电压围为 0—9.9V，最大电流为 1000mA，并可由 LED 数码显示管显示实际输出电压值。系统有过流保护电路，当输出电流过大时功率管自动截至。本设计由单片机程控输出数字信号，经过 D/A 转换器（DAC0832）输出模拟量，再经过运算放大器隔离放大，控制输出功率管的基极，随着功率管基极电压的变化而输出不同的电压。实际测试结果表明，本系统实际应用于需要高稳定度小功率恒压源的领域。关键词：数字控制;直流稳压电源;单片机AbstractThis system to dc voltage source as the core, mainly AT89C51SCM, through the keyboard controller to install dc power supply output voltage, setting stepping class can reach.01v output voltage, the range of 0-9.9 V, the maximum current1000mA for, and can show the actual pipe by digital output voltage values. This system consists of microcontroller program output digital signal, through D/A converter (DAC0832) output analog amplifier, through isolating amplifier output power, control of base, with the power to change the passive tube voltage output of different voltage. Test results show that this system application in need of high stability of small power constant-voltage source fields.Keywords: Digital control ； Regular power supply of direct current；Single-chip microcomputer目录摘要……………………………………………………………………………..……1ABSTRACT………………………………………………………………………...Ⅱ目录…………………………………………………………………………….……Ⅲ第一章 引言……………………………………………………………………..…11.1 设计背景和意义…………………………………………….…………………11.2 设计任务要求………………………………………………….………………2第二章 方案设计与论证……………………………………………………….. 82.1 方案比较………………………………………………………………...
