基于單片機(jī)控制的開關(guān)電源資料,基于,單片機(jī),控制,節(jié)制,開關(guān)電源,資料 摘 要 本文介紹了一種基于單片機(jī)控制的數(shù)控開關(guān)電源，以89C51單片機(jī)作為控制核心，對(duì)開關(guān)變換電路進(jìn)行脈寬調(diào)制，構(gòu)成一個(gè)智能閉環(huán)控制系統(tǒng)。單片機(jī)控制的開關(guān)電源具備更加完善的功能，更人性化、智能化，便于實(shí)時(shí)監(jiān)控。其功能主要包括對(duì)開關(guān)電源輸出電壓進(jìn)行檢測，并顯示實(shí)時(shí)電壓值；通過按鍵進(jìn)行編程預(yù)置期望輸出的電壓；通過A/D轉(zhuǎn)換器采樣輸出電壓，根據(jù)PID算法計(jì)算控制量修改占空比,以得到期望的輸出電壓，并通過PID算法控制輸出電壓穩(wěn)定在設(shè)定的電壓值上；擁有可靠的過流保護(hù)功能以及輔助電源可同時(shí)作為電源輸入和給單片機(jī)提供工作電壓，并可以通過鍵盤不斷改變PID參數(shù)，可以進(jìn)行實(shí)時(shí)調(diào)整。本系統(tǒng)具有友好的用戶界面，結(jié)構(gòu)簡單，成本低廉，實(shí)用性強(qiáng)，擴(kuò)展空間大，可作為實(shí)驗(yàn)室電源，在計(jì)算機(jī)，家電產(chǎn)品等許多方面也有非常好的應(yīng)用前景。 開關(guān)電源因其具有功耗低、效率高的優(yōu)點(diǎn)，在家用電器、科學(xué)實(shí)驗(yàn)、教學(xué)設(shè)備等等領(lǐng)域得到了廣泛的應(yīng)用。隨著電子技術(shù)的高速發(fā)展，各種電子設(shè)備對(duì)電源的要求越來越高，電源也朝著高效率、高可靠性以及智能化的方向發(fā)展。傳統(tǒng)開關(guān)電源使用專門的脈寬調(diào)制芯片，結(jié)構(gòu)復(fù)雜，而利用單片機(jī)和鍵盤可以簡化電源結(jié)構(gòu)，實(shí)現(xiàn)對(duì)電源的智能控制，本文正是從這個(gè)角度考慮，研究制作低成本、操作簡單、智能控制的開關(guān)電源。 關(guān)鍵詞：開關(guān)電源；單片機(jī)；脈寬調(diào)制；功率開關(guān)管；占空比 Abstract This text introduces one kind of digital control switching mode power supply ,which controlled by single chip microcomputer 89C51 ,using pulse width modulation to control switch transformation circuit , constitute a close loop intelligence control system. The switch power supply, which is controlled by single chip microcomputer, has more perfect function, more humanized ,intelligence and easier for the hour supervise and control. Its function mainly includes the examination of the output voltage ,and the manifestation of voltage value ; input the expect output voltage through the keyboard ;take a sample from the output ,basing on the compute result of the PID procedure to modification the duty cycle to get the expect voltage and control the stability of out put voltage ; having a dependable over-current protection function and a assistance power supply ,which can provide power to the single chip microcomputer ,and change the parameter of PID to improve the control result .This system has a friendly customer interface ,very simple structure ,very low cost ,very strong function ,a big space to expand ,can use as the laboratory power supply , at the power supply of the computer and the appliance product ,also has very nice applied foreground. Switch power supply because its power exhaust is very low and its efficiency is very high, so it got extensive application at home appliances, science experiment, the teaching equipments etc. realm. With the quick development of technical electronics, the request of various electronics equipments to power supply became more higher . Power supply also develop toward the direction, which become high-efficiency, more credibility, and more intelligence. The traditional switch power supply uses the specialized PWM chip to control, structure complications. And making use of the single chip microcomputer can carry out the intelligence control to the power supply and simplify the power supply structure. This text considers from this angle exactly, inquiry into making a switch power supply, which is Low cost, easier to operate and intelligence control. Key words :switching mode power supply ;single chip microcomputer ;Pulse Width Modulation control；duty cycle