【正文】 C 校正技術，因此重點對 PFC 控制方案的選取進行論證。 。 （ 2）當 Us=24V， Io 在 ～ 范圍內變化時，負載調整率 SI ≤ %。 關鍵詞： PFC 控制，單片機控制，自行校正 . . 目 錄 ................................................................................................................................................................5 ................................................................................................................................................................5 基本要求 ......................................................................................................................................................... 5 發(fā)揮部分 ......................................................................................................................................................... 5 ..........................................................................................................................................6 方案一： ............................................................................................................................................................... 6 方案二： ............................................................................................................................................................... 6 方案三： ............................................................................................................................................................... 6 ........................................................................................................................................................7 AC/DC 電源模塊 .......................................................................................................................................... 7 Boost 升壓模塊 ............................................................................................................................................. 7 升壓結構特性分析 .............................................................................. 7 樣機電路設計 ............................................................................................ 9 儲能電感 L............................................................................................... 10 輸出電壓取樣電阻 R R2 .......................................................................11 開關 S ......................................................................................................11 輸出二極管 D 和輸出電容器 C2 ................................................................11 外補償網(wǎng)絡 ..............................................................................................11 斜坡補償 ................................................................................................. 12 功率因數(shù) 校正 模塊 .................................................................................................................................... 14 功率因數(shù)測量模塊 .................................................................................................................................... 14 電路保護模塊 ............................................................................................................................................. 15 89C54 單片機控制模塊 ............................................................................................................................ 15 LCD 液晶顯示模塊 .................................................................................................................................... 15 液晶顯示原理 ........................................................................................... 15 引腳功能說明 ........................................................................................... 16 1602 液晶模塊的指令（說明： 1 為高電平、 0 為低電平） ......................... 16 直流電源供電模塊 .................................................................................................................................... 17 ............................................................................................................................................................. 17 ..................................................................................