【正文】 機(jī)傳動(dòng)設(shè)備的應(yīng)用領(lǐng)域中，比如風(fēng)機(jī)水泵、港口起重設(shè)備、風(fēng)力發(fā)電機(jī)等等還有對(duì)電機(jī)進(jìn)行調(diào)速的需求。 關(guān)鍵詞： 異步電機(jī) 、直接轉(zhuǎn)矩 控制 、 系統(tǒng)仿真 、 磁鏈計(jì)算 三相異步電機(jī)直接轉(zhuǎn)矩控制研究 2 Abstract: For threephase asynchronous motor direct torque control (DTC) is a high performance frequency control. The threephase asynchronous motor direct torque control following the vector control technology developed a new, highperformance frequency control technology. Use of space vector analysis method, directly in the stator coordinate system and control the torque of the AC motor stator flux orientation control of torque and flux hysteresis PWM signal directly to the inverter switching state the optimal control, in order to obtain high dynamic performance of the system. Direct Torque Control with fast torque response, the control structure is simple, easy to implement fully digital features, are widely used. With economic development, the use of highperformance AC speed gradually to replace higherpriced DC speed in many areas is a trend. Direct Torque Control is the greatest potential for a highperformance AC variable speed, and the control method is very suitable for alldigital, so its indepth study has a good practical significance. 1985 German scholar Depenbrock and Japanese scholars Takahashi have put forward the idea of induction motor direct torque control (DTC). Direct Torque Control technology was born, novel control their own thoughts, concise system structure, excellent static performance by the general concern and has been a rapid development. The DTC study has been made a lot of progress, but it also in theory and practice is not mature enough, such as lowspeed performance, torque ripple, limiting the speed range of the system. Threephase induction motor speed control system of this thesis direct torque control scheme. Related to the multidisciplinary field of motor drives, power electronics, automatic control theory, the direct torque control system, including torque calculation, flux, torque, flux linkage hysteresis regulator and speed PI regulator, mainly includes the following four parts: First part of introducing the subject of research background and domestic research status quo. The second part of the establishment of a mathematical model of the threephase 三相異步電機(jī)直接轉(zhuǎn)矩控制研究 3 asynchronous motor, clear basic principle of direct torque control. The third part, a detailed analysis of the position of the various parts of the direct torque control system. The fourth part of the simulation using MATLABSIMULINK tool for the design of threephase asynchronous motor direct torque control system and dynamic analysis of simulation results, static control effect. Keywords: Asynchronous motors, DTC, System Simulation, MTBLAB, Flux calculation 三相異步電機(jī)直接轉(zhuǎn)矩控制研究 4 1 緒論 課題研究的背景、目的及其意義 在我們的日常生活中，電機(jī)傳動(dòng)設(shè)備已經(jīng)深入到社會(huì)生活的各個(gè)領(lǐng)域。 第三部分，詳細(xì)分析直接轉(zhuǎn)矩控制系統(tǒng)各部 分的組成。涉及到電機(jī)傳動(dòng)、電力電子技術(shù)、自動(dòng)控制原理等多學(xué)科領(lǐng)域，對(duì)直接轉(zhuǎn)矩控制系統(tǒng)的研究，包括轉(zhuǎn)矩計(jì)算、磁鏈計(jì)算、轉(zhuǎn)矩、磁鏈滯環(huán)調(diào)節(jié)器及轉(zhuǎn)速 PI調(diào)節(jié)等，主要包括以下四 個(gè)部分： 第一部分，介紹課題的研究背景和國(guó)內(nèi)研究現(xiàn)狀。 DTC 的研究雖然已取得了很大進(jìn)展，但是它在理論和實(shí)踐上還不夠成熟，如低速性能差、脈動(dòng)轉(zhuǎn)矩大、限制了系統(tǒng)的調(diào)速范圍。 1985 年德國(guó)學(xué)者 Depenbrock 和日本學(xué)者 Takahashi 相繼提出異步電機(jī)的直接轉(zhuǎn)矩控制 (DTC)思想。 隨著經(jīng)濟(jì)的發(fā)展，在諸多領(lǐng)域里利用高性能的交流調(diào)速逐步替代價(jià)格較高的直流調(diào)速是一個(gè)趨勢(shì)。它利用空間矢量分析方法，直接在定子坐標(biāo)系下計(jì)算和控制交流電機(jī)的轉(zhuǎn)矩，采用定子磁場(chǎng)定向，通過(guò)對(duì)轉(zhuǎn)矩和磁鏈的滯環(huán)控制產(chǎn)生 PWM信號(hào)，直接對(duì)逆變器的開關(guān)狀態(tài)進(jìn)行最佳控制，以獲得系統(tǒng)的高動(dòng)態(tài)性能。 畢 業(yè) 設(shè) 計(jì) 2021 年 5 月 15 日設(shè)計(jì)題目 三相異步電機(jī)直接轉(zhuǎn)矩控制研究 學(xué)生姓名 曲世彪 學(xué) 號(hào) 20212252 專業(yè)班級(jí) 電氣工程及其自動(dòng)化 09 級(jí) — 2 班 指導(dǎo)教師 王曉晨 院系名稱 電氣與自動(dòng)化工程學(xué)院 三相異步電機(jī)直接轉(zhuǎn)矩控制研究 I 目 錄 中文摘要： ............................................................ 1 關(guān)鍵詞： .............................................................. 1 Abstract: ............................................................. 2 Keywords: ............................................................. 3 1 緒論 ............................................................... 4 課題 研究的背景、目的及其意義 ..................................... 4 直接轉(zhuǎn)矩控制算法的國(guó)內(nèi)外研究現(xiàn)狀 ................................. 6 2 直接轉(zhuǎn)矩控制的理論基礎(chǔ) ............................................. 6 三相異步電 機(jī)的數(shù)學(xué)模型 ........................................... 6 三相異步電機(jī)的數(shù)學(xué)模型 ............................................... 6 電壓空間矢量對(duì)定子磁鏈的影響 ......................................... 8 電壓空間矢量對(duì)電機(jī) 轉(zhuǎn)矩的影響 ......................................... 9 逆變器以及基本空間矢量的概念和原理 .............................. 10 3. 直接轉(zhuǎn)矩控制的控制原理 ........................................... 12 定子磁鏈?zhǔn)噶靠臻g位 置檢測(cè) ........................................ 13 定子磁鏈、轉(zhuǎn)矩和扇區(qū)的計(jì)算 ...................................... 14 定子磁鏈估計(jì) ........................................................ 14 電磁轉(zhuǎn)矩估計(jì) ....................................................... 18 定子磁鏈和電磁轉(zhuǎn)矩的控制 ........................................ 18 磁鏈調(diào)節(jié)和轉(zhuǎn)矩調(diào)節(jié) .............................................. 20 起動(dòng)問(wèn)題 ........................................................ 21 直接轉(zhuǎn)矩控制與傳統(tǒng)的矢量控制比較 ................................ 21 直接轉(zhuǎn)矩控制的特點(diǎn) ................................................. 22 DTC 與矢量控制的比較 ................................................ 22 本章小結(jié) ........................................................ 23 4. 直接轉(zhuǎn)矩控制系統(tǒng)的仿真和性能分析 ................................. 23 關(guān)于 MATLAB 軟件 ................................................. 23 MATLAB 軟件簡(jiǎn)介 ................................................. 24 直接轉(zhuǎn)矩控制系統(tǒng)的 Matlab／ Simulink 仿真 ......................... 24 直接轉(zhuǎn)矩控制系統(tǒng)的性能優(yōu)缺點(diǎn)分析 ................................ 26 本章小結(jié) ........................................................ 27 三相異步電機(jī)直接轉(zhuǎn)矩控制研究 II 結(jié)論 ................................................................. 28 謝辭 ................................................................. 30 [參考文獻(xiàn) ] ................................................