1、I摘要隨著電力電子技術(shù)的發(fā)展和新型功率元器件的不斷出現(xiàn)，開(kāi)關(guān)電源技術(shù)得到了飛速的發(fā)展，在計(jì)算機(jī)、通訊、電力、家用電器、航空航天等領(lǐng)域得到廣泛應(yīng)用，取得了顯著的成果。本論文是通過(guò)用電源控制芯片M51995AFP設(shè)計(jì)并制作一種開(kāi)關(guān)電源，該開(kāi)關(guān)電源是通過(guò)PWM技術(shù)控制開(kāi)關(guān)的占空比來(lái)調(diào)整輸出電壓的，以達(dá)到穩(wěn)定輸出的目的。論文主要完成的內(nèi)容有：（1）根據(jù)設(shè)計(jì)需要選擇開(kāi)關(guān)電源電路；（2）設(shè)計(jì)輸入整流濾波電路，并確定相關(guān)器件參數(shù)；（3）基于M5199

2、5AFP對(duì)開(kāi)關(guān)電源的控制核心部分進(jìn)行設(shè)計(jì)；（4）設(shè)計(jì)輸出整流濾波電路，并確定相關(guān)器件參數(shù)；（5）設(shè)計(jì)電壓反饋電路；（6）通過(guò)實(shí)驗(yàn)和計(jì)算對(duì)設(shè)計(jì)中的數(shù)據(jù)進(jìn)行驗(yàn)證。本論文對(duì)開(kāi)關(guān)電源的濾波、整流、反饋電路等分別作了細(xì)致的研究工作，通過(guò)實(shí)驗(yàn)和計(jì)算，掌握了開(kāi)關(guān)電源設(shè)計(jì)的核心技術(shù)，并對(duì)設(shè)計(jì)過(guò)程進(jìn)行了詳盡的闡述。關(guān)鍵詞關(guān)鍵詞：開(kāi)關(guān)電源；占空比；PWMIII目錄1緒論............................................

3、...................................................................................................11.1開(kāi)關(guān)電源的概念和分類(lèi).......................................................................................11.1.1開(kāi)關(guān)電源的概念.......

4、....................................................................................11.1.2開(kāi)關(guān)電源的分類(lèi)...........................................................................................31.2開(kāi)關(guān)電源設(shè)計(jì)中存在的問(wèn)題與未來(lái)發(fā)展...........

5、................................................41.2.1開(kāi)關(guān)電源中存在的問(wèn)題...............................................................................41.2.2開(kāi)關(guān)電源的發(fā)展趨勢(shì)..............................................................

6、.....................52開(kāi)關(guān)電源元器件的選用.....................................................................................................62.1開(kāi)關(guān)晶體管.............................................................................

7、..............................62.1.1功率開(kāi)關(guān)MOSFET..........................................................................................62.1.2絕緣柵雙極型晶體管.....................................................................

8、.............72.2軟磁鐵氧體磁芯...................................................................................................82.2.1磁性材料的基本特性..................................................................................

9、.92.2.2磁芯的結(jié)構(gòu)與選用.......................................................................................92.3光電耦合器.........................................................................................................102.

10、4二極管.................................................................................................................122.4.1開(kāi)關(guān)二極管...........................................................................................

11、......132.4.2穩(wěn)壓二極管.................................................................................................132.4.3快速恢復(fù)及超快速恢復(fù)二極管.................................................................142.5自動(dòng)恢復(fù)開(kāi)關(guān).........

12、............................................................................................142.6熱敏電阻.............................................................................................................153開(kāi)關(guān)電源的設(shè)計(jì)

13、基礎(chǔ)........................................................................................................173.1開(kāi)關(guān)電源的控制方式....................................................................................................

14、..173.1.1脈寬調(diào)制的基本原理.................................................................................173.1.2脈沖頻率調(diào)制的基本原理.........................................................................183.2各類(lèi)拓?fù)浣Y(jié)構(gòu)電源分析...............

15、......................................................................193.3諧振式電源與軟開(kāi)關(guān)技術(shù).................................................................................243.3.1電路的諧振現(xiàn)象.......................................

16、..................................................243.3.2諧振式電源的基本原理.............................................................................253.3.3諧振開(kāi)關(guān)的動(dòng)態(tài)過(guò)程分析..........................................................