基于PLC的異步電機(jī)變頻器控制研究

電氣自動(dòng)化附開(kāi)題報(bào)告,論文字?jǐn)?shù):11268.頁(yè)數(shù):22   論文編號(hào):ZD111 

目  錄

1 前言 ................................................................1
2 國(guó)內(nèi)外變頻調(diào)速技術(shù)的發(fā)展概況........................................ 2
2.1 國(guó)內(nèi)變頻技術(shù)的發(fā)展概況............................................ 2
2.2 國(guó)外變頻調(diào)速技術(shù)的發(fā)展概況 ........................................2
3 變頻調(diào)速理論基礎(chǔ).....................................................4
4 可編程序控制器.......................................................5
4.1 可編程序控制器的發(fā)展及應(yīng)用……………………………………………………5
4.2 PLC的基本結(jié)構(gòu)………………………………………………………………………….6
4.3 PLC的特點(diǎn)……………………………………………………………………………….7
4.4 PLC的工作原理…………………………………………………………………………9
5 PLC控制電機(jī)變頻調(diào)速系統(tǒng)……………………………………………………………10
  5.1 PLC控制電機(jī)變頻調(diào)速系統(tǒng)構(gòu)成……………………………………………………10
5.2 PLC通過(guò)變頻器控制電動(dòng)機(jī)的旋轉(zhuǎn)方向……………………………………………….11
5.3 PLC變頻調(diào)速恒壓供水系統(tǒng)…………………………………………………………….12
5.3.1 工作原理………………………………………..………………………………….12
5.3.2 系統(tǒng)硬件構(gòu)成……………………………………………………………………...13
5.3.3 系統(tǒng)軟件程序設(shè)計(jì)………………………………………………………………..14
5.3.4 系統(tǒng)參數(shù)的確定…………………………………………………………………..15
5.3.5 變頻器及PLC的選擇……………………………………………………………..15
6 總結(jié)…………………………………………………………………………………………16
致謝……………………………………………………………………………………………16
參考文獻(xiàn)……………………………………………………………………………………17

摘 要：隨著變頻調(diào)速技術(shù)的應(yīng)用日益廣泛，應(yīng)用水平的不斷提高，對(duì)變頻調(diào)速控制系統(tǒng)的精度要求也同樣的越來(lái)越高。文中首先對(duì)變頻調(diào)速系統(tǒng)的工作原理做了簡(jiǎn)單的介紹，從理論上分析了變頻調(diào)速系統(tǒng)的機(jī)械特性。其次本文介紹了一種用可編程序控制器實(shí)現(xiàn)異步電機(jī)變頻調(diào)速的理論基礎(chǔ)和實(shí)現(xiàn)方法。可編程序控制器實(shí)質(zhì)上是一種工業(yè)控制專業(yè)計(jì)算機(jī), 它所采用的梯形圖作為編程語(yǔ)言簡(jiǎn)單易學(xué)。同時(shí)，可編程序控制器又是以微處理器為核心的工業(yè)控制裝置,它所具有應(yīng)用靈活，抗干擾性強(qiáng)、操作方便和維護(hù)簡(jiǎn)單等的特點(diǎn)，使得整個(gè)控制系統(tǒng)的可靠性得到大大提高。

關(guān)鍵詞：變頻調(diào)速;可編程序控制器;異步電機(jī)

Abstract：With the increasing application of VVVF technology and constantly improving applied level, the accuracy requirement of VVVF control system is getting higher and higher. First, this paper presents a brief introduce to the VVVF system’s principle of work, theoretically analyzed the VVVF system's mechanical characteristics. Then the thesis deals with a rationale and realizable method of coming true the induction motor’s VVVF by PLC. Virtually, the PLC is a specialized computer of industrial control, it adopts the trapezoidal chart as the programming language and easily to learn. Furthermore, PLC also is an industrial control installment of taking the microprocessor as the core. It applies flexibly, operates easily, maintains simply, and the anti-jamming is strong, all these characteristic causes entire control system is enhanced greatly.

Keywords: VVVF; PLC; Induction Motors