【正文】 地位，交流拖動(dòng) 已經(jīng) 進(jìn)入了與直流 拖動(dòng)相媲美、相抗衡的時(shí)代。本論文結(jié)合我國(guó) 煤礦凍結(jié)站 的現(xiàn)狀，并利用在校期間掌握的專業(yè)技能，設(shè)計(jì)了一套利用 PLC 變頻調(diào)速器以傳感器為基礎(chǔ)的 水泵流量閉環(huán)調(diào)速 系統(tǒng)。變頻調(diào)速技術(shù)用于水泵控制系統(tǒng)，具有調(diào)速性能好、節(jié)能效果顯著、運(yùn)行工藝安全可靠等優(yōu)點(diǎn)?？梢哉f(shuō)變頻調(diào)速技術(shù)是一項(xiàng)利國(guó)利民、有 廣泛應(yīng)用前景的高新技術(shù)。 變頻器 調(diào)節(jié)流量閉環(huán) 控制： 通過(guò)供水管道上的遠(yuǎn)傳 流量計(jì) ，輸出 020mA 模擬量信號(hào)送入 PLC， 在通過(guò) A/D 轉(zhuǎn)換，執(zhí)行 PID 程序， D/A 轉(zhuǎn)換后，輸出控制信號(hào)給變頻器， 來(lái)自動(dòng)調(diào)節(jié)變頻器的輸出頻率，來(lái)自動(dòng)調(diào)節(jié)變頻器的輸出頻率，從而改 變 拖動(dòng) 水泵的 電動(dòng)機(jī)的轉(zhuǎn)速，達(dá)到調(diào)節(jié)流量的作用 。 在文章中，我們研究了采用可編程控制器控制的變頻器對(duì)鹽水泵進(jìn)行調(diào)速所產(chǎn)生的節(jié)能減排效益，重點(diǎn)提到了凍結(jié)站鹽水泵變頻節(jié)能系統(tǒng)的硬件組成及軟件設(shè)計(jì)。 關(guān)鍵詞：凍結(jié)站，變頻器，鹽水泵，變頻器，節(jié)能，閉環(huán)調(diào)速 安徽理工大學(xué)畢業(yè)設(shè)計(jì) II COAL FREEZE STATION SALT WATER PUMPING FREQUENCY GOVERNORSYSTEM ABSTRACT In recent years, the development of AC variable speed very quickly, breaking the dominance of the DC drive speed field, AC Drive has entered the era of parable DC drive, to pete. This paper bines the status quo of China39。 Inverter regulate the flow of closedloop control: Far EasTone flow meter on the water supply pipes, into the inverter output 020mA analog signal to automatically adjust the inverter output frequency, thus changing the drag pump motor speed and reach adjustmentthe role of the flow. AC variable speed AC motor speed control method of the optimal solution, the inverter is used for salt water pump mechanical governor to regulate the flow, save energy, improve economic efficiency. 安徽理工大學(xué)畢業(yè)設(shè)計(jì) III In the article, we study the brine pump speed generated by the programmable controller to control the inverter energy saving benefits, highlighted the freeze Station salt water pump frequency energy system hardware and software design. Also referred to the relevant aspects of the motor, inverter, PLC, structure and model selection. KEYWORDS: freezing station, inverter， salt water pumps， frequency converter， energysaving， closedloop speed 安徽理工大學(xué)畢業(yè)設(shè)計(jì) i 目錄 摘要 （中文） ..................................................................................................................... I 摘要（外文） .................................................................................................................... II 1 緒論 ................................................................................................................................. 1 引言 ...................................................................................................................... 1 煤礦凍結(jié)法鑿井簡(jiǎn)介 .......................................................................................... 1 凍結(jié)施工存在的問(wèn)題 .......................................................................................... 3 國(guó)內(nèi)外交流變頻技術(shù)的發(fā)展 .............................................................................. 3 研究背景及變頻改 造的意義 .............................................................................. 4 2 變頻調(diào)速在水泵中的研究 ............................................................................................. 6 變頻調(diào)速在水泵中的主要調(diào)節(jié)方式 .................................................................. 6 水泵變頻調(diào)速和其他方法的節(jié)能對(duì)比 .............................................................. 6 調(diào)節(jié)水泵流量的兩種方法 ........................................................................ 6 轉(zhuǎn)速控制法和傳統(tǒng)方法的比較 ................................................................ 7 變頻器原理 .......................................................................................................... 8 交流變頻器的工作原理 ............................................................................ 8 變頻器的控制方式 .................................................................................... 9 鹽水泵變頻調(diào)速的優(yōu)點(diǎn) .................................................................................... 10 鹽水泵變頻調(diào)速系統(tǒng)的總體設(shè)計(jì) .................................................................... 10 3 變頻技術(shù)在凍結(jié)站鹽水泵應(yīng)用中的硬件分析和系統(tǒng)說(shuō)明 ....................................... 12 鹽水泵的選型介紹 ............................................................................................ 12 離心泵的分類 .......................................................................................... 12 離心泵的命名方式 .................................................................................. 12 泵的性能介紹 .......................................................................................... 12 14Sh9A 型水泵介紹 ................................................................................ 13 異步電動(dòng)機(jī)的選型介紹 .................................................................................... 13 三相電動(dòng)機(jī)的轉(zhuǎn)動(dòng)原理 .......................................................................... 13 三相異步電動(dòng)機(jī)的選型依據(jù) .................................................................. 14 變頻器選型 ........................................................................................................ 14 變頻器的各種分類 .................................................................................. 14 變頻器的基本結(jié)構(gòu)框圖 .......................................................................... 15 交 直 交變頻器主電路 ........................................................................... 16 變頻器的參數(shù)介紹 .................................................................................. 17 變頻器的選型及硬件配置 ...................................................................... 18 安徽理工大學(xué)畢業(yè)設(shè)計(jì) ii 可編程控制器（ PLC） ..................................................................................... 19 可編程控制器的作用 .............................................................................. 19 可編程控制器的特點(diǎn) .............................................................................. 20 PLC 的基本結(jié)構(gòu)框圖 ............................................................................... 21 S7200 系統(tǒng)概述 ...................................................................................... 22 電磁流量傳感器 ................................................................................................ 23 冷凍站鹽水泵變頻調(diào)速系統(tǒng)的結(jié)構(gòu)圖 ............................................................ 24 結(jié)構(gòu)圖說(shuō)明 ...............................................