基于矢量控制的異步電動(dòng)機(jī)變頻調(diào)速系統(tǒng)的設(shè)計(jì)與仿真

電氣自動(dòng)化論文編號(hào):ZD1145    論文字?jǐn)?shù):15807,頁(yè)數(shù):34

目錄
中文摘要 i
英文摘要 ii
目錄 iii
第一章 緒論 1
 1.1 選題背景 1
 1.2 變頻調(diào)速控制技術(shù)的發(fā)展趨勢(shì) 4
 1.3 論文意義和任務(wù) 5
第二章 異步電機(jī)矢量控制系統(tǒng)設(shè)計(jì) 6
 2.1 矢量變頻調(diào)速的原理 6
 2.2 矢量控制的基本思路 6
 2.3 坐標(biāo)變換 7
2.3.1 靜止3s/2s,2s/3s變換 7
2.3.2 直/極變換(K/P變換) 8
 2.4 矢量控制的方程式 8
 2.5 矢量控制變頻調(diào)速系統(tǒng) 11
 2.6 本章小節(jié) 13
第三章 逆變器以及大功率器件IGBT 14
 3.1 SPWM逆變器的工作原理 14
 3.2 SPWM逆變器的主回路 15
 3.3 IGBT的工作原理和工作特性 17
 3.4 本章小節(jié) 18
第四章 系統(tǒng)仿真 19
 4.1 MATLAB軟件簡(jiǎn)介 19
 4.2動(dòng)態(tài)仿真工具SIMULINK 20
 4.3 仿真算法 22
4.3.1 常用的仿真算法 22
4.3.2 SIMULINK中的仿真算法 23
 4.4 系統(tǒng)仿真 23
 4.5控制系統(tǒng)參數(shù)及仿真結(jié)果 28
 4.6 本章小節(jié) 29
第五章 結(jié)論與展望 31
參考文獻(xiàn) 33
致謝 34

摘要
   矢量變換控制是在電機(jī)統(tǒng)一理論,機(jī)電能量轉(zhuǎn)換和坐標(biāo)變換理論的基礎(chǔ)上發(fā)展起來(lái)的,具有先進(jìn)性,新穎性和使用性的特點(diǎn)。矢量控制的思想就是將異步電動(dòng)機(jī)模擬成直流電動(dòng)機(jī)來(lái)控制,通過(guò)坐標(biāo)變換,將定子電流分解問(wèn)按轉(zhuǎn)子磁場(chǎng)定向的兩個(gè)直流分量并分別加以控制,從而實(shí)現(xiàn)磁通和轉(zhuǎn)矩的解耦控制,達(dá)到直流電機(jī)的效果。
   針對(duì)異步電動(dòng)機(jī)比直流電動(dòng)機(jī)調(diào)速困難的問(wèn)題, 提出了異步電動(dòng)機(jī)矢量變頻調(diào)速的控制策略, 本文介紹了異步電動(dòng)機(jī)矢量控制的基本原理, 并且結(jié)合實(shí)際設(shè)計(jì)出異步電機(jī)矢量變頻調(diào)速系統(tǒng)的結(jié)構(gòu)圖, 根據(jù)異步電機(jī)模型和在調(diào)速系統(tǒng)中各子系統(tǒng)的模型, 在SIMULINK 環(huán)境下對(duì)該系統(tǒng)進(jìn)行仿真, 并得出實(shí)驗(yàn)結(jié)果。本文對(duì)異步電機(jī)矢量控制變頻調(diào)速系統(tǒng)進(jìn)行了設(shè)計(jì)和仿真，利用MATLAB對(duì)矢量變換的電機(jī)模型及此模型構(gòu)成的矢量控制系統(tǒng)進(jìn)行仿真,仿真表明,選擇合適的參數(shù),可獲得動(dòng)態(tài)響應(yīng)快,超調(diào)小,抗擾能力強(qiáng),具有良好的動(dòng)態(tài)跟蹤能力的高性能的矢量控制調(diào)速系統(tǒng),這樣的系統(tǒng)具有一定的應(yīng)用價(jià)值,同時(shí)可以看出,SIMULINK實(shí)現(xiàn)了全土形化仿真,具有高效,便利,直觀(guān)等優(yōu)點(diǎn),對(duì)控制系統(tǒng)確為一優(yōu)秀的仿真軟件。
關(guān)鍵詞: 單片機(jī) 變頻器 矢量控制 SIMULINK

Abstract
 
Field Oriented Control is based on motor unification principle,energy conversion and vector coordinate transformation theory.It has many advantages such as novelty,practicability and advancement.By transforming coordinate,the stator current is decomposing two DC parts which orientated as the rotator magnetic field and controlled respectively.So magnetic flux and torque are decoupled.It controls the asynchronous motor as asynchronous way.
According to the AC Motor is difficult to the direct current motor in the velocity modulation,propose the AC Motor vector frequency conversion velocity modulation control strategy .The Paper introduced the baisc principle of vector control and designed Systems of AC Motor vector control and variable frequency speed regulationn.At the end, the system is simulated in SIMULINK and the result are shown.this thesis achieves the design and simulation about inductive motor's fully digitally vector control system.Using the motor model of vector in vertation in MATLAB and the system composed of these model,it realized the simulatiao.the result show that,choosing appropriste parameters,the system can archived rapid variable state response,high repellency and good variable and stabel state following ability. This type of system has better performance And SIMULINK.
Keyword: single-chip  frequence converter  vector control     SIMULINK