【正文】 畢業(yè)設(shè)計(jì)（論文） 直流穩(wěn)壓電源設(shè)計(jì) 系 別： 電子工程系 河南工業(yè)職業(yè)技術(shù)學(xué)院 II 摘 要 在各種電子實(shí)驗(yàn)中，電源是最基本的需要。設(shè)計(jì)出一種高精度的可調(diào)輸出的電源不但能滿足不同電子實(shí)驗(yàn)的要求，而且能滿足在同一實(shí)驗(yàn)中需要使用不同的電壓值來測(cè)試的要求。 本文設(shè)計(jì)了一種高精度程控穩(wěn)壓電源。該電源的功能由硬件和軟件兩方面來實(shí)現(xiàn)。硬件方面包括變壓器、整流電路、濾波電路、穩(wěn)壓電路、反饋電路、保護(hù)電路、程控電路、顯示電路以及支持單片機(jī)運(yùn)行的復(fù)位和時(shí)鐘電路。市電 220V 電壓通過變壓器流入系統(tǒng)，經(jīng)過整流、濾波后變成 近似的直流電壓，再經(jīng)過穩(wěn)壓部分穩(wěn)壓后獲得穩(wěn)定的直流輸出。穩(wěn)壓部分由達(dá)林頓管作為調(diào)整管，由運(yùn)放作為反饋取樣之后的放大電路，利用放大電路來提高調(diào)整管的反應(yīng)靈敏度電壓穩(wěn)定性。軟件方面，使用單片機(jī)語言編程，控制程控部分，即：?jiǎn)纹瑱C(jī)， D/A、 A/D 部分。該部分作用是控制穩(wěn)壓電路部分的基準(zhǔn)電壓的輸出與調(diào)整，同時(shí)實(shí)現(xiàn)高精度的輸出，并且控制數(shù)碼管顯示輸出電壓。 整個(gè)電路的設(shè)計(jì)就是在綜合考慮各個(gè)模塊現(xiàn)有的電路的基礎(chǔ)上，選擇最佳電路來實(shí)現(xiàn)設(shè)計(jì)目標(biāo)的。 關(guān)鍵詞 直流穩(wěn)定電源；整流；濾波；程控； D/A； A/D 河南工業(yè)職業(yè)技術(shù)學(xué)院 III Abstract In various electronics experiments, the power supply is the most basic a power supply which has high accuracy and ajustable output can satisfy not only the request of different electronics experiments,but also the demand in same experiment to use different electric voltage values for test. This text introduced a kind of high accuracy distance to control steady press the design of the power supply. The function of that power supply is carry out by the hardware and the software both side. The hardware includes transformer, mutate the electric circuit, the filter electric circuit, steady press electric circuit, feedback electric circuit, the protection electric circuit, distance to control electric circuit, the manifestation electric circuit and support a single slice luck to go of reset with the clock electric circuit. The city gives or get an electric shock the 220 V electric voltage to pass the transformer afflux system, passing by to mutate, the filter bees similar direct current electric voltage behind, again has been pressed part steadily steady press behind acquire stable direct current exportation. Steady press part from reach Dynatron as to adjust a tube, is put by the luck after being the feedback sampling of enlarge electric circuit, make use of to enlarge electric circuit to raise an intelligent degree of the reaction of the adjustment tube an electric voltage stability. The software aspect, use a single slice the machine language plait distance, control a distance to control part, namely: Single slice machine, D/A,A/D part. It39。s part of functions turn to is the exportation of the basis electric voltage that the controls is steady to press the electric circuit parts and adjust, carry out the exportation of the high accuracy in the meantime, and the control figures tube manifestation output electric voltage. The design of the whole electric circuit is the foundation that is synthesizing to consider each existing electric circuit up, choose the best electric circuit to carry out the design target Keywords DC stable power supply。 mutate。 filter。 programmable control。 D/A。 A/D 河南工業(yè) 職業(yè)技術(shù)學(xué)院 i 目 錄 摘 要 ............................................................................................................II Abstract ..................................................................................................... III 第 1 章 緒論 .................................................................................................1 課題背景 ...........................................................................................1 電源技術(shù)的發(fā)展趨勢(shì) ........................................................................1 電源技術(shù)存在的問題 .......................................................................2 第 2 章 穩(wěn)壓電源整體設(shè)計(jì) .........................................................................3 整流電路 .........................................................................................3 單相半波整流電路 .........................................................................3 單向全波整流電路 ..........................................................................4 橋式整流電路 .................................................................................4 濾波電路 ........................................................................................5 電容濾波電路 .................................................................................6 電感濾波器 ......................................................................................7 穩(wěn)壓電路 ............................................................................................8 穩(wěn)壓電路的指標(biāo) ............................................................................8 穩(wěn)壓管基本應(yīng)用電路 .....................................................................9 串聯(lián)反饋型晶體管穩(wěn)壓電路 .......................................................10 第 3 章 硬件部分外圍電路設(shè)計(jì) ...............................................................15 程控部分 ..........................................................................................15 8051 單片機(jī) ...................................................................................15 D/A 和 A/D 芯片 ...........................................................................15 單片機(jī)外圍電路 ............................