【正文】 od, and chose the UC3825 voltage pulse width modulator. This article lists the DC/DC conversion of the various topologies, makes a parison of the four PWM control modes, analyzes the parallel dual interleaved forward converter’s operating principle and working process, derives in detail and establish the small signal model, designs the pensation work, and carries out the main circuit’s and control circuit’s engineering calculation. Finally, this paper makes the system frequency and time domain simulation, and make some correlation analysis. Key words: dual forward converter, voltage feedback control, small signal model, pensation work, simulation 常州工學(xué)院畢業(yè)設(shè)計論文 II 目 錄 摘 要 ...............................................................................................................................I Abstract ...........................................................................................................................I 目 錄 ............................................................................................................................. II 第 1 章 緒論 ................................................................................................................... 1 開關(guān)電源概述 .................................................................................................. 1 本課題研究意義 .............................................................................................. 1 隔離式 DC/DC 變換拓?fù)淞信e ....................................................................... 2 反饋控制模式分類 .......................................................................................... 4 本課題方案研究 .............................................................................................. 7 功率電路選擇 ....................................................................................... 7 控制電路的選擇 ................................................................................... 8 本文研究的主要內(nèi)容 ...................................................................................... 8 本章小結(jié) .......................................................................................................... 8 第 2 章 功率電路狀態(tài)分析及其參數(shù)設(shè)置 .................................................................. 9 功率電路結(jié)構(gòu)及其工作原理分析 .................................................................. 9 電路結(jié)構(gòu)分析 ....................................................................................... 9 功率電路工作原理分析 ....................................................................... 9 主電路參數(shù)設(shè)計 ............................................................................................ 14 技術(shù)指標(biāo) ............................................................................................. 14 功率電路變壓器設(shè)計 ......................................................................... 15 主功率開關(guān)管的選擇 ......................................................................... 19 二極管的選擇 ..................................................................................... 19 輸出濾波電感 的選擇 ......................................................................... 20 輸出濾波電容的選擇 ......................................................................... 21 本章小結(jié) ........................................................................................................ 21 第 3 章 系統(tǒng)建模與控制電路的設(shè)計 ........................................................................ 22 功率電路建模 ................................................................................................ 22 小信號模型的建立 ............................................................................. 22 標(biāo)準(zhǔn)型等效電路的建立 ..................................................................... 25 電壓控制脈寬調(diào)制器建模與系統(tǒng)穩(wěn)態(tài)傳遞函數(shù)的建立 ............................ 28 常州工學(xué)院畢業(yè)設(shè)計論文 III 電壓控制型開關(guān)調(diào)節(jié)電路原理介紹 ................................................. 28 脈寬調(diào)制器的數(shù)學(xué)模型 ..................................................................... 28 電壓控制系統(tǒng)原始回路穩(wěn)態(tài)傳遞函數(shù)的建立 ................................. 29 補(bǔ)償網(wǎng)絡(luò)的設(shè)計 ................................................................................. 31 控制電路結(jié)構(gòu) ................................................................................................ 34 UC3825 外圍電路 .............................................................................. 34 主功率管驅(qū)動電路 ............................................................................. 36 過流保護(hù)電路 ..................................................................................... 37 本章小結(jié) ........................................................................................................ 38 第 4 章 電路仿真 ........................................................................................................ 39 仿真軟件簡介 ................................................................................................ 39 系統(tǒng)時域仿真 ................................................................................................ 40 時域仿真電路及其波形 ..................................................................... 40 時域仿真分析 ..................................................................................... 44 本章小結(jié) ........................................................................................................ 45 結(jié)論 .............................................................................................................................. 46 參考文獻(xiàn) ...................................................................................................................... 47 致謝 .............................................................................................................................. 50 附錄 ................................................................................................................................ 1 常州工學(xué)院畢業(yè)設(shè)計論文 1 第 1 章 緒 論 開關(guān)電源概述 隨著電力電子技術(shù)的飛速發(fā)展，固態(tài)化靜止型功率變換電源已經(jīng)發(fā)展成為電力電子技術(shù)的三大應(yīng)用領(lǐng)域之一 (另兩個是“運(yùn)動控制”和“電力品質(zhì)控制” )。 此外，其 并聯(lián)結(jié)構(gòu)縮小了輸出濾波電感的體積，降低了器件的應(yīng)力，從