【正文】 oop speed regulation system. Application of PLC PID mands to realize dc motor speed closedloop control. This system is easy to expand, easy to expand all kinds of I/O modules and function modules. Keywords PLC； Direct current machine； Double closedloop； Controls 蘇州科技學院 天平學院 本科生畢業(yè)設計（論文） III 目 錄 第 1 章 緒論 .................................................................................................................... 1 直流電動機簡介 ................................................................................................... 1 雙閉環(huán)調(diào)速系統(tǒng) ................................................................................................... 1 PLC 在電機調(diào)速中的應用 .................................................................................... 2 第 2 章 系統(tǒng)總體設計及算法模型確定 ............................................................................. 4 系統(tǒng)總體設計 ...................................................................................................... 4 雙閉環(huán)調(diào)速系統(tǒng)常用控制方法介紹 ....................................................................... 5 控制方法的確定 ................................................................................................... 6 PID 控制的結構 ........................................................................................ 7 PID 參數(shù)的調(diào)整 ........................................................................................ 9 PID 模塊 ................................................................................................... 9 系統(tǒng)參數(shù)計算 ..................................................................................................... 11 主電路參數(shù)計算 ....................................................................................... 11 電流環(huán)節(jié)（ ACR）的設計 ......................................................................... 11 轉速環(huán)（ ASR）的設計 .............................................................................13 按轉速環(huán) (ASR)退飽和重新計算超調(diào)量 .....................................................14 第 3 章 硬件設計 ............................................................................................................16 系統(tǒng)總體結構 .....................................................................................................16 CPU 主機部分 ..........................................................................................16 電機驅(qū)動部分 ..........................................................................................16 檢測部分 ............................................................................................................17 電流檢測部分 ..........................................................................................17 速度檢測部分 ..........................................................................................18 數(shù)據(jù)采集模塊 .....................................................................................................19 PLC 輸入 /輸出端口 ..................................................................................20 用于 PLC 的輸入 /輸出模塊 .......................................................................22 采集時序控制電路 ...................................................................................23 正交采用 .................................................................................................23 模塊量混合模塊 EM235............................................................................24 蘇州科技學院 天平學院 本科生畢業(yè)設計（論文） IV 晶閘管 —電動機電路設計 ....................................................................................24 整流變壓器的設計 ...................................................................................24 晶閘管的保護 ..........................................................................................24 晶體管驅(qū)動、觸發(fā)電路的設計 .............................................................................25 驅(qū)動電路原理 ..........................................................................................25 觸發(fā)電路原理 ..........................................................................................26 穩(wěn)壓電源 ............................................................................................................26 第 4 章 軟件設計 ............................................................................................................27 系統(tǒng)程序設計方案 ..............................................................................................27 主程序設計 .........................................................................................................27 速度初始化子程序 ..............................................................................................28 轉速檢測子程序 ..................................................................................................30 電流檢測子程序 ..................................................................................................30 PID 控制子程序 ..................................................................................................31 電流環(huán)及轉速換子程序 .......................................................................................32 結 論 ............................................................................................................................34 致 謝 ............................................................................................................................36 參 考 文 獻 ...................................................................................................................37 附錄 A 譯文 .................................................................................................................38 基于 PLC 直流電動機雙閉環(huán)調(diào)速系統(tǒng) ......................................................................38 附錄 B 外文 原文 ...........................................................................................................52 附錄 C 程序清單 ...........................................................................................................70