全数字控制稳压电源设计

文档编号:JD779 附原理图及PCB,外文翻译, 文档字数:17159,页数:27

本文介绍了以AT89C51单片机为控制单元，以数模转换器DAC0832输出参考电压，且用参考电压控制电压转换模块LM350输出电压大小的数控电源。AT89C51单片机为主控制器，通过按键来控制直流电源的输出电压，设置步进等级可达0.1V，并可由数码管显示实际输出电压设定值。本系统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。单片机系统还兼顾对恒压源进行实时监控，输出电压经过电流/电压转变后，通过A/D转换芯片，实时把模拟量转化为数据量，再经单片机分析处理，通过数据形式的反馈环节，使电压更加稳定，这样构成稳定的电压源。
关键词：单片机;数模转换器（DA）;数控电源

Abstract

The introduction to this text regards AT89C51 one-chip computer as the control module, export the reference voltage in order to count mould converter DAC0832, control and change module LM350 to output the size of voltage in order to consult the electricity. AT89C51 one-chip computer is a master controller, the output controlling the direct current power through the button is pressed, setting up can reach 0.1V to walk into the grade , and can be shown that outputs the voltage establishing value actually by the digital tube. This system is outputted the digital signal.programme-controlledly by the one-chip computer, output analog quantity through D/A converter (DAC0832 ), and then undergo the operation amplifier to isolate and amplify , control the base that output power is in charge of, output different voltage as the power is in charge of the change of the voltage of base. One-chip computer give consideration to also for constant voltage system it control ,it output by voltage through electric current /after voltage change, change through A/D chip is real-time to analyse and process analog quantity person who turns data into by one-chip computer and then, through the feedback link of the form of the data , make the voltage more steady , form the steady voltage source like this.
Keywords:One-chip computer; Mould converter (DA ); Count the numerical control power

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目录

引言…………………………………………………………………………………1
1  绪论……………………………………………………………………………1
2  系统设计部分………………………………………………………………5
3  芯片介绍………………………………………………………………………12
4  软件电路设计………………………………………………………………21
5  调试……………………………………………………………………………23
6  结论…………………………………………………………………………24
谢辞……………………………………………………………………………………25
参考文献……………………………………………………………………………26
附录………………………………………………………………………………………… 27

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