【正文】 ost； single_switch； low output ripple 目錄 I 目錄 第 1 章 緒論 .................................................................................................................................... 1 升壓變換器的歷史背景 ................................................................................................ 1 開發(fā)新能源的緊迫性與可再生能源的開發(fā) ................................................................. 1 高增益變換器的現(xiàn)狀 ................................................................................................. 2 開關(guān)單元高增益直流變換器 ...................................................................................... 2 耦合電感高增益直流變換器 ...................................................................................... 3 傳統(tǒng)的 Boost 變換器工作原理 ..................................................................................... 4 Flyback 電路工作原理 ................................................................................................... 6 本文的研究?jī)?nèi)容及意義 ....................................................................................................... 7 第 2 章 Boostflyback 變換器 ............................................................................................................ 8 變換器拓?fù)浣Y(jié)構(gòu)與工作過程 ............................................................................. 8 拓補(bǔ)結(jié)構(gòu)及其工作原理 .............................................................................................. 8 拓?fù)涔ぷ鬟^程分析 ................................................................................. 9 Boost DCDC 變換器模型 .................................................................................................... 11 本章小結(jié) ...........................................................................................................................13 第 3 章 電路參數(shù)計(jì)算及控制器設(shè)計(jì) ................................................................................................14 設(shè)計(jì)要求： ........................................................................................................................14 ..........................................................................................................14 MOS 管參數(shù)設(shè)計(jì) ......................................................................................................14 濾波電容參數(shù)設(shè)計(jì) ...................................................................................................15 電感值計(jì)算： ..........................................................................................................16 Boost 電路二極管設(shè)計(jì) ...............................................................................................16 控制器設(shè)計(jì) ........................................................................................................................16 控制器的應(yīng)用背景 ...................................................................................................16 控制器設(shè)計(jì) ..............................................................................................................17 PID 參數(shù)整 定口訣： .................................................................................................18 試湊法求 PI 參數(shù) .....................................................................................................18 試湊數(shù)據(jù)總結(jié)： .......................................................................................................22 基于邊界整定法的經(jīng)驗(yàn)公式： ..................................................................................22 本章小結(jié) ..........................................................................................................................23 第 4 章 主電路的仿真及結(jié)果分析 ...................................................................................................24 PSIM 電力電子仿真軟件 .....................................................................................................24 仿真輸出結(jié)果及分析 .........................................................................................................25 仿真主電路 ..............................................................................................................25 變化的輸入電壓，輸出電壓的響應(yīng)曲線 ....................................................................28 負(fù)載突加的實(shí)驗(yàn)仿真波形 ..........................................................................................29 本章總結(jié) ...........................................................................................................................31 第 5 章 總結(jié)與展望 ........................................................................................................................32 全文總結(jié) ...........................................................................................................................32 后期展望 ..........................................................................................................................32 參考文獻(xiàn) ........................................................................................................................................33 致謝 ...............................................................................................................................................36 第 1 章 緒論 1 第 1 章 緒論 升壓變換器的歷史背景 開發(fā)新能源的緊迫性與可再生能源的開發(fā) 升壓式 DC— DC 變換器在通信、電子、計(jì)算機(jī)等領(lǐng)域有著廣泛的應(yīng)用前景，光伏發(fā)電領(lǐng)域中光伏組件模塊輸出電壓低，為了將直流母線電壓提升到常規(guī)電壓以用來并網(wǎng)逆變，用的直流變換器必須具備高電壓增益的特點(diǎn)，變換器的變換效率與光伏發(fā)電系統(tǒng)發(fā)電效率息息相關(guān)，因此，研究適合用于小功率場(chǎng)合、達(dá)到高電壓增益、高效率要求的直流變換器成了急待解決的問題。采用邊界整定法試湊出滿足要求的 PID 參數(shù)，給出了合理合乎指標(biāo)要求的PID 參數(shù)。摘要 摘要 小功率光伏或燃料電池發(fā)電系統(tǒng)，因?yàn)殡姵仉妷汉艿停ǔＰ枰妷涸鲆娓哌_(dá) 10 倍以上的直流變換器將其升壓后經(jīng)逆變器輸出。 分析了直流 直流變換器的動(dòng)態(tài)特性，并對(duì)直流變換器進(jìn)行了建模，然后根據(jù)得到的模型設(shè)計(jì)了合適的 PI 控制器，減少了動(dòng)態(tài)響應(yīng)時(shí)間，提高了噪聲抑制性能，增強(qiáng)了系統(tǒng)的穩(wěn)態(tài)特性。 關(guān)鍵詞 ：高增益；反激升壓；單開關(guān)管；低紋波 Abstract Low power photovoltaic or fuel cell power generation system, because the battery voltage is low, usually need to dc converter voltage gain as much as more than 10 times of its booster after the inverter Boost converter to achieve high voltage gain pared to wide conduction, however wid