【正文】 achine. High frequency induction motor is used in high speed motorized spindle predominantly, and the control method is frequency control. Direct Torque Control a new type of highperformance AC Variable Speed Technology which is developed following vector control technology. Because of the novel control idea and the sample system structure, the high speed motorized spindle is more suitable for highspeed electric spindle driver. It meets the highspeed, wide speed range, highspeed instant quasistop dynamic characteristics and the requirements of the static characteristics and bee a hot technology in the field of AC drive. In this paper, the basic principle and structure of DTC have been introduced. And use Matlab/Simulink build to build the DTC simulation system mode. Calculating and control the AC motor flux and torque in the stator coordinate system Direct by using space vector analysis method. The PWM signal produce by the doublebit analog regulator let he inverter switching state in optimal controlling lead to torque’s high dynamic performance. By setting the corresponding parameters, simulation results and the results were analyzed. Keywords: High Speed Motorized Spindle , Asynchronous Motor ， Direct Torque Control， Flux link， Matlab/Simulink Simulation 重慶大學(xué)本科學(xué)生畢業(yè)設(shè)計(jì)（論文） 目錄 Ⅲ 目 錄 摘 要 ............................................................. Ⅰ ABSTRACT ......................................................... Ⅱ 1 緒論 ................................................................ 1 國(guó)內(nèi)高速電主軸的現(xiàn)狀和發(fā)展趨勢(shì) ..................................................................... 1 國(guó)內(nèi)外高速電主軸的現(xiàn)狀 ........................................................................... 1 國(guó)內(nèi)外高速電主軸的差距 .......................................................................... 2 直接轉(zhuǎn)矩控制技術(shù)的發(fā)展和現(xiàn)狀 ......................................................................... 4 直接轉(zhuǎn)矩控制技 術(shù)的現(xiàn)狀及發(fā)展趨勢(shì) .......................................................... 4 直接轉(zhuǎn)矩控制技術(shù)的發(fā)展趨勢(shì) .................................................................... 4 論文主要內(nèi)容 ..................................................................................................... 5 本章小結(jié) ............................................................................................................. 5 2 直接轉(zhuǎn)矩控制的基本原理 ........................................ 6 引言 ................................................................................................................... 6 異步電動(dòng)機(jī)的數(shù)學(xué)模型 ....................................................................................... 6 異步電動(dòng)機(jī)理想數(shù)學(xué)模型 ........................................................................... 6 異步電動(dòng)機(jī)空間矢量等效電路 .................................................................... 7 逆變器的開頭狀態(tài)及電壓空間矢量 ...................................................................... 8 逆變器的開關(guān)狀態(tài) .................................................................................... 8 電壓空間矢量 ......................................................................................... 10 異步電動(dòng)機(jī)的磁鏈模型 ..................................................................................... 10 空間電壓矢量對(duì)定子磁鏈 及轉(zhuǎn)矩的作用 ............................................................. 12 空間電壓矢量對(duì)定子磁鏈的作用 ............................................................. 12 空間電壓矢量對(duì)電磁轉(zhuǎn)矩的作用 ............................................................. 13 直接轉(zhuǎn)矩控制系統(tǒng)的基本結(jié)構(gòu) ........................................................................... 14 本章小節(jié) ........................................................................................................... 15 3 直接轉(zhuǎn)矩控制系統(tǒng) MATLAB/SIMULINK 仿真 ..................... 16 引言 ................................................................................................................. 16 軟件介紹 ................................................................................................ 16 簡(jiǎn)介 ............................................................................................ 16 動(dòng)態(tài)仿真工具 Simulink .......................................................................... 16 建立直接轉(zhuǎn)矩控制仿真模型 .............................................................................. 17 重慶大學(xué)本科學(xué)生畢業(yè)設(shè)計(jì)（論文） 目錄 Ⅲ 仿真的主要對(duì)數(shù)設(shè)置 ......................................................................................... 21 本章小結(jié) ........................................................................................................... 21 4 仿真及結(jié)果分析 .................................................. 22 仿真結(jié)果 ........................................................................................................... 22 改變轉(zhuǎn)速 ........................................................................................................... 24 改變負(fù)載 ........................................................................................................... 26 本章小結(jié) ........................................................................................................... 27 總 結(jié) ............................................................... 29 致 謝 ............................................................... 30 參考文獻(xiàn) ............................................................. 31 重慶大學(xué)本科學(xué)生畢業(yè)設(shè)計(jì)（論文） 1 緒論 1 1 緒論 國(guó)內(nèi)高速電主軸的現(xiàn)狀和發(fā)展趨勢(shì) 國(guó)內(nèi)外高速電主軸的現(xiàn)狀 我國(guó)電主軸研發(fā)生產(chǎn)起源于磨加工，特別是軸承的內(nèi)表面磨加工，這是根據(jù)行業(yè)的生產(chǎn)需要而發(fā)展起來的的。與此同時(shí)，借助于德國(guó) REXROTH 的電機(jī)，不少單位紛紛組裝出了轉(zhuǎn)速高于 10000 轉(zhuǎn) /分的電主軸。由 于一般的電主軸技術(shù)門檻相對(duì)較低，國(guó)內(nèi)企業(yè)技術(shù)實(shí)力雄厚，在電主軸性價(jià)比方面占有絕對(duì)優(yōu)勢(shì)，因此國(guó)外產(chǎn)品一般很少用到。為了 能滿足機(jī)床技術(shù)、高速切削技術(shù)的發(fā)展和實(shí)際應(yīng)用的需要，數(shù)控機(jī)床用電主軸的性能必須不斷提高，這對(duì)高水平企業(yè)來說是發(fā)展的動(dòng)力。不同軸承的運(yùn)用場(chǎng)合不同，其中陶瓷軸承和液體動(dòng)靜壓軸承主要應(yīng)用在高速精密主軸上，空氣潤(rùn)滑軸承和磁懸浮軸承主要用于特殊場(chǎng)合。國(guó)外諸多企業(yè)在這個(gè)基礎(chǔ)上，研發(fā)出了多種高技術(shù)水平的高速機(jī)床。在這個(gè)技術(shù)潮流下，瑞士 IBAG