【正文】 . The results prove that the program is feasible and effective. [Key words] Magic Particle Testing Thyristor regulator Trigger circuit Power Electronics Phaseshift control Matlab simulation 安徽工業(yè)大學(xué) 畢業(yè)設(shè)計(jì)（論文）說明書 共 頁 第 6 頁 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ 裝 ┊ ┊ ┊ ┊ ┊ 訂 ┊ ┊ ┊ ┊ ┊ 線 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ 目錄 摘 要 ...................................................................................................................................... 1 Abstract .................................................................................................................................. 4 目錄 ........................................................................................................................................ 6 第一章 緒論 ........................................................................................................................ 8 背景和意義 ............................................................................................................ 8 磁粉檢測(cè)的原理及發(fā)展 ........................................................................................ 9 磁粉檢測(cè)基本原理 ...................................................................................... 9 磁粉檢測(cè)的發(fā)展 .......................................................................................... 9 磁粉檢測(cè)現(xiàn)狀 .............................................................................................. 9 交流調(diào)壓技術(shù)的發(fā)展 .......................................................................................... 10 可控硅調(diào)壓在磁粉檢測(cè)中的應(yīng)用 ...................................................................... 11 本課題主要研究內(nèi)容 .......................................................................................... 12 第二章 主電路設(shè)計(jì) .......................................................................................................... 13 主電路設(shè)計(jì)的基 本原理及框圖 .......................................................................... 13 磁化電流 .............................................................................................................. 14 交流調(diào)壓控制方式 ................................................................................................ 15 可控硅的結(jié)構(gòu)及工作原理 ........................................................................ 15 交流調(diào)壓電路 ............................................................................................ 17 降壓變壓電路 ............................................................................................ 19 RC 保護(hù)電路 ............................................................................................. 19 整體主電路圖以及工作過程 .............................................................................. 21 退磁原理 .............................................................................................................. 22 剩磁的產(chǎn)生與影響 .................................................................................... 22 退磁的原理 ................................................................................................ 22 第三章 觸發(fā)電路設(shè)計(jì) .................................................................................................. 24 觸發(fā)電路設(shè)計(jì)思路 .............................................................................................. 24 晶閘管移相觸發(fā)集成電路 TCA785 功能 .......................................................... 24 引腳排列、各引腳的功能及用法 ............................................................ 25 基本設(shè)計(jì)特點(diǎn)和極限參數(shù) ........................................................................ 27 以 TCA785 為核心的觸發(fā)脈沖產(chǎn)生電路 .......................................................... 28 脈沖信號(hào)放大電路 .............................................................................................. 30 放大電路的工作原理 ................................................................................ 30 放大電路的組成原則 ................................................................................... 31 脈沖放大電路設(shè)計(jì)及工作過程 ................................................................... 31 安徽工業(yè)大學(xué) 畢業(yè)設(shè)計(jì)（論文）說明書 共 頁 第 7 頁 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ 裝 ┊ ┊ ┊ ┊ ┊ 訂 ┊ ┊ ┊ ┊ ┊ 線 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ 整體觸發(fā)電路工作過程 ........................................................................................ 32 第四章 對(duì)主電路的 MATLAB 仿真 ............................................................................... 33 MATLAB 仿真簡介及在電力電子系統(tǒng)中的應(yīng)用 ............................................ 33 可控硅調(diào)壓主電路 MATLAB 仿真 ................................................................... 33 仿真模型建立及仿真結(jié)果分析 .......................................................................... 34 結(jié) 論 .................................................................................................................................. 37 致 謝 .................................................................................................................................. 39 參 考 文 獻(xiàn) ........................................................................................................................ 40 附圖 ...................................................................................................................................... 41 安徽工業(yè)大學(xué) 畢業(yè)設(shè)