【正文】 pe of switch power supply output current and LED lights in the collection of temperature ,Through the STC12A60S2 producing controlled PWM signal to the switch power ,The 1602 current and liquid crystal display temperatureThis paper makes a study of the flyback type of switch power design, production, optimization and single chip microputer to switch power supply voltage signal acquisition and feedback to switch power through the output pulse occupies dutycycle (PWM) signals to control the output power of current, power supply to meet the normal work of LED lights of control. Key words:Numerical control power source。五邑大學(xué)本科畢業(yè)論文 1目 錄摘 要........................................................................................................................................3 Abstract...........................................................................................................................................4緒論................................................................................................................................................ 5 引言.........................................................................................................................5 電源的發(fā)展趨勢(shì)....................................................................................................5 國(guó)內(nèi)外研究現(xiàn)狀....................................................................................................5 本文的研究?jī)?nèi)容....................................................................................................6 照明光源的發(fā)展與優(yōu)缺點(diǎn)....................................................................................7 LED 電源設(shè)計(jì)要求 ...............................................................................................8第 2 章 開(kāi)關(guān)電源的所具有制作..................................................................................................10 開(kāi)關(guān)電源的基本原理...........................................................................................10 開(kāi)關(guān)電源的幾種拓?fù)浣Y(jié)構(gòu)...................................................................................11 本文數(shù)控電源的控制形式...................................................................................11 反激式開(kāi)電源的工作原理...................................................................................12 反激式開(kāi)關(guān)電源的設(shè)計(jì)..........................................................................................14 ，確定設(shè)計(jì)要求..........................................................................................14 ，IC 的選擇..................................................................................................14，變壓器的設(shè)計(jì)........................................................................................................15 ，開(kāi)關(guān)電源變壓器的繞線(xiàn)方法...................................................................15 ，磁飽和.......................................................................................................15五邑大學(xué)本科畢業(yè)論文 2 ，變壓器參數(shù)的計(jì)算...................................................................................16 本章小結(jié).................................................................................................................21第 3 章 第 3 章主控板的制作與系統(tǒng)軟件設(shè)計(jì).......................................................................21 主控板電路原理圖模塊.........................................................................................21 系統(tǒng)軟件設(shè)計(jì)........................................................................................................24 主程序設(shè)計(jì).................................................................................................25 模塊....................................................................................................26 本章小結(jié).................................................................................................................26第 4 章 第 4 章 結(jié)果與討論....................................................................................................27 開(kāi)關(guān)電源原邊電壓波形圖.....................................................................................27 開(kāi)關(guān)管的占空比.....................................................................................................29 開(kāi)關(guān)電源的效率.....................................................................................................30 漏感導(dǎo)致效率低..........................................................................................31 勵(lì)磁電流導(dǎo)致.............................................................................................31 原件及磁芯的選取......................................................................................31 單片機(jī)的電壓、溫度采集與 PWM 控制..............................................................33 作品實(shí)物圖片..........................................................................................................33 開(kāi)關(guān)電源實(shí)物作品圖片.............................................................................34 單片機(jī)控制模塊作品圖片..............................................