【正文】 II Based on PLC dc motor double closedloop speed regulation system design Abstract Along with the rapid development of the power electronic technology, puter technology and the automatic control technology, the programmable controller’s (PLC) function more perfect and more extensive application based on PLC control system, gradually bee the mainstream of the industrial control system. In this paper introduces the dc motor based on PLC double closedloop speed regulation system, according to the dc speed control theory and the theory of automatic control system, this paper introduces the PLC control of double closedloop speed regulation system position, working principle and the dynamic performance. This system of dc motor double closedloop speed regulation system of the digital transformation, make current loop and speed loop controller by PLC system are discussed to realize. With Siemens S7200 PLC and the CPU222 both extension module to realize dc motor double closed loop 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(xué)院 天平學(xué)院 本科生畢業(yè)設(shè)計(jì)（論文） III 目 錄 第 1 章 緒論 .................................................................................................................... 1 直流電動(dòng)機(jī)簡(jiǎn)介 ................................................................................................... 1 雙閉環(huán)調(diào)速系統(tǒng) ................................................................................................... 1 PLC 在電機(jī)調(diào)速中的應(yīng)用 .................................................................................... 2 第 2 章 系統(tǒng)總體設(shè)計(jì)及算法模型確定 ............................................................................. 4 系統(tǒng)總體設(shè)計(jì) ...................................................................................................... 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(jié)構(gòu) ........................................................................................ 7 PID 參數(shù)的調(diào)整 ........................................................................................ 9 PID 模塊 ................................................................................................... 9 系統(tǒng)參數(shù)計(jì)算 ..................................................................................................... 11 主電路參數(shù)計(jì)算 ....................................................................................... 11 電流環(huán)節(jié)（ ACR）的設(shè)計(jì) ......................................................................... 11 轉(zhuǎn)速環(huán)（ ASR）的設(shè)計(jì) .............................................................................13 按轉(zhuǎn)速環(huán) (ASR)退飽和重新計(jì)算超調(diào)量 .....................................................14 第 3 章 硬件設(shè)計(jì) ............................................................................................................16 系統(tǒng)總體結(jié)構(gòu) .....................................................................................................16 CPU 主機(jī)部分 ..........................................................................................16 電機(jī)驅(qū)動(dòng)部分 ..........................................................................................16 檢測(cè)部分 ............................................................................................................17 電流檢測(cè)部分 ..........................................................................................17 速度檢測(cè)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(shí)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(xué)院 天平學(xué)院 本科生畢業(yè)設(shè)計(jì)（論文） IV 晶閘管 —電動(dòng)機(jī)電路設(shè)計(jì) ....................................................................................24 整流變壓器的設(shè)計(jì) ...................................................................................24 晶閘管的保護(hù) ..........................................................................................24 晶體管驅(qū)動(dòng)、觸發(fā)電路的設(shè)計(jì) .............................................................................25 驅(qū)動(dòng)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(shè)計(jì) ............................................................................................................27 系統(tǒng)程序設(shè)計(jì)方案 ..............................................................................................27 主程序設(shè)計(jì) .........................................................................................................27 速度初始化子程序 ..............................................................................................28 轉(zhuǎn)速檢測(cè)子程序 ..................................................................................................30 電流檢測(cè)子程序 ..................................................................................................30 PID 控制子程序 ........................................................................