摘 要

目前使用的直流穩(wěn)壓電源大部分是線性電源，利用分立器件組成，其體積大，效率低，可靠性差，操作使用不方便，自我保護(hù)功能不夠，因而故障率高。隨著電子技術(shù)的飛速發(fā)展，各種電子、電器設(shè)備對(duì)穩(wěn)壓電源的性能要求日益提高，穩(wěn)壓電源不斷朝著小型化，高效率，低成本，高可靠性，低電磁干擾，模塊化和智能化方向發(fā)展。以單片機(jī)系統(tǒng)為核心而設(shè)計(jì)制造出來的新一代智能穩(wěn)壓電源不但電路簡(jiǎn)單，結(jié)構(gòu)緊湊，價(jià)格低廉，性能卓越，而且由于單片機(jī)具有計(jì)算和控制能力，利用它對(duì)采樣數(shù)據(jù)進(jìn)行各種計(jì)算，從而可排除和減少由于騷擾信號(hào)和模擬電路引起的誤差，大大提高穩(wěn)壓電源輸出電壓和控制電流精度，降低了對(duì)模擬電路的要求。智能穩(wěn)壓電源可利用單片機(jī)設(shè)置周密的保護(hù)監(jiān)測(cè)系統(tǒng)，確保電源運(yùn)行可靠。輸出電壓和限定電流采用數(shù)字顯示，輸入采用按鍵方式，電源的外表美觀，操作使用方便，具有較高的使用價(jià)值。本設(shè)計(jì)介紹了一種基于單片機(jī)的智能穩(wěn)壓電源的設(shè)計(jì)方案，其核心技術(shù)是通過單片機(jī)控制數(shù)模轉(zhuǎn)換來改變其后的穩(wěn)壓模塊的輸出。該系統(tǒng)由整流濾波初步穩(wěn)壓部分、單片機(jī)控制部分、DAC和顯示部分組成，該穩(wěn)壓電源能連續(xù)步進(jìn)可調(diào)，并且可實(shí)時(shí)顯示，彌補(bǔ)了傳統(tǒng)穩(wěn)壓電源的不足。

關(guān)鍵詞：?jiǎn)纹瑱C(jī)，穩(wěn)壓電源，連續(xù)步進(jìn)可調(diào)，DAC

Design of Intelligent Power Supply Based on MCU

ABSTRACT

Current use of dc voltage stabilizer most is linear power supply, the use of discrete components, their large size, low efficiency, reliability sex differences, not convenient operation, self protection function is not enough, so high failure rate. With the rapid development of electronic technology, various kinds of electronic, electrical equipment for the performance requirements of voltage stabilizer is increasing day by day, manostat move toward miniaturization, high efficiency, low cost, high reliability, low electromagnetic interference, modular and intelligent direction. On the single chip computer system as the core and the design is made out of a new generation of intelligent manostat not only circuit is simple, compact structure, the price is low, performance is remarkable, and because the single chip microcomputer control ability of calculation and, with it, all the sampled data calculation, which can eliminate and reduce because analog signal and harass the error caused by, and greatly improve the power supply voltage output voltage and current control precision, lower the analog circuit requirements. Intelligent manostat available SCM set careful protection monitoring system, ensure that the power supply reliable operation. Output voltage and current limit the digital display, keyboard input the way, the power supply appearance, convenient in operation, has the high use value. This paper introduces a kind of intelligent voltage stabilizer based on single chip, the design of its core technology is through the single-chip microcomputer control analog-to-digital conversion to change later on voltage stability module output. The system consists of rectifier voltage filter preliminary part and single-chip microcomputer control part, DAC and display parts, the voltage stabilizer can step into continuous adjustable, and can real-time display, to make up for the deficiency of traditional voltage stabilizer.


KEY WORDS: MCU，Regulated Power Supply， Stepping and adjustable row，DAC

目　錄

前　言 1
第1章 概 述 3
1.1 直流穩(wěn)壓電源的發(fā)展方向 3
1.1.1 智能化 3
1.1.2 數(shù)字化 4
1.1.3 模塊化 4
1.1.4 綠色化 4
1.2 國(guó)內(nèi)發(fā)展現(xiàn)狀 4
1.3系統(tǒng)研究方向 5
第2章 設(shè)計(jì)原理 6
2.1 設(shè)計(jì)原理 6
2.1.1 穩(wěn)壓電源基本原理 6
2.1.2 穩(wěn)壓電路設(shè)計(jì)方案 6
2.2 系統(tǒng)框圖 8
第3章 主要器件介紹 9
3.1 AT89C51簡(jiǎn)介 9
3.1.1 89C51單片機(jī)組成 9
3.2 DAC0832工作原理 13
3.3 74LS373工作原理 14
3.4數(shù)碼管顯示原理 16
3.4.1數(shù)碼管結(jié)構(gòu) 16
3.4.2數(shù)碼管工作原理 16
3.4.3數(shù)碼管字形編碼 17
第4章 硬件電路與數(shù)據(jù)測(cè)試 20
4.1 整流濾波、初步穩(wěn)壓 20
4.2 AT89C51主控部分 22
4.3 數(shù)模轉(zhuǎn)換DAC0832 22
4.4 穩(wěn)壓部分 23
4.4.1電源穩(wěn)壓芯片 24
4.5 顯示電路 25
第5章 軟件設(shè)計(jì) 27
5.1 軟件流程圖 27
結(jié)　論 28
謝 辭 29
參考文獻(xiàn) 30
附 錄 31
外文資料翻譯 37