【摘要】：高速數(shù)控機(jī)床是先進(jìn)制造技術(shù)的核心，其性能主要取決于高速主軸的性能，目前我國(guó)高速化驅(qū)動(dòng)技術(shù)與國(guó)外先進(jìn)水平相比仍有一定差距。異步電機(jī)的結(jié)構(gòu)適合于弱磁高速運(yùn)行，一直是主軸驅(qū)動(dòng)電機(jī)的主流，因而研究其弱磁控制技術(shù)具有一定的現(xiàn)實(shí)意義。 按轉(zhuǎn)子磁場(chǎng)定向的矢量控制方案，可實(shí)現(xiàn)電機(jī)轉(zhuǎn)矩電流和磁場(chǎng)電流的解耦控制，是進(jìn)行異步電機(jī)弱磁控制的基礎(chǔ)。本文首先從電機(jī)空間矢量定義入手，推導(dǎo)出異步電機(jī)的動(dòng)態(tài)方程，然后在此基礎(chǔ)上詳細(xì)闡述了轉(zhuǎn)子磁場(chǎng)定向和間接矢量控制原理。在交流電機(jī)矢量控制中，，常采用空間矢量脈寬調(diào)制（SVPWM）方法生成逆變器驅(qū)動(dòng)脈沖信號(hào)。本文介紹了SVPWM的基本原理及其實(shí)現(xiàn)步驟，并引入了一種基于傅立葉分解的線性增益過(guò)調(diào)制策略，在減小電壓畸變的同時(shí)實(shí)現(xiàn)了近似于1的調(diào)制比。 異步電機(jī)運(yùn)行過(guò)程中會(huì)受到最大電壓、電流和最大轉(zhuǎn)差率的限制，本文根據(jù)這些約束條件推導(dǎo)出了異步電機(jī)轉(zhuǎn)矩最大化電流矢量軌跡，并在此基礎(chǔ)上引出了基于電機(jī)理想模型的基本弱磁策略。針對(duì)基本弱磁策略的不足，一種加入了電壓反饋的改進(jìn)弱磁策略被提出。此外，本文構(gòu)造了復(fù)矢量PI控制器解決高速運(yùn)行控制量耦合加劇的問(wèn)題，并設(shè)計(jì)了一種基于無(wú)功的轉(zhuǎn)子時(shí)間常數(shù)在線辨識(shí)算法，以削弱轉(zhuǎn)子時(shí)間常數(shù)變化對(duì)磁場(chǎng)定向的影響。 最后，本文搭建了基于matlab的異步電機(jī)弱磁控制系統(tǒng)仿真平臺(tái)，對(duì)文章各部分算法的有效性進(jìn)行了驗(yàn)證。
[Abstract]:High-speed CNC machine tool is the core of advanced manufacturing technology, and its performance mainly depends on the performance of high-speed spindle. At present, there is still a certain gap between high-speed drive technology of our country and advanced level of foreign countries. The structure of asynchronous motor is suitable for high speed operation of weak magnetic field and has always been the mainstream of spindle drive motor. Therefore, it is of practical significance to study the weak magnetic field control technology of asynchronous motor. The decoupling control of torque current and magnetic field current can be realized according to the vector control scheme of rotor flux orientation, which is the basis of the weak magnetic field control of asynchronous motor. In this paper, the dynamic equation of induction motor is derived from the definition of space vector, and then the principle of rotor flux orientation and indirect vector control is described in detail. In vector control of AC motor, space vector pulse width modulation (SVPWM) method is often used to generate inverter driving pulse signal. This paper introduces the basic principle of SVPWM and its implementation steps, and introduces a linear gain overmodulation strategy based on Fourier decomposition, which can reduce the voltage distortion and achieve a modulation ratio of approximately 1. The maximum voltage, current and maximum slip rate of the asynchronous motor will be limited during operation. According to these constraints, the maximum current vector locus of the torque of the asynchronous motor is derived in this paper. On this basis, the basic weak magnetic field strategy based on the motor ideal model is introduced. In order to overcome the shortcomings of the basic weak magnetic strategy, an improved weak magnetic strategy with voltage feedback is proposed. In addition, a complex vector Pi controller is constructed to solve the problem of increasing coupling of high speed control variables, and an on-line reactive power based rotor time constant identification algorithm is designed to weaken the influence of rotor time constant change on magnetic field orientation. Finally, the simulation platform of induction motor weak magnetic field control system based on matlab is built, and the validity of each part of the algorithm is verified.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM343;TM301.2

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 薛福連;線繞式異步電機(jī)的維修[J];微電機(jī)(伺服技術(shù));2002年05期

2 陳志宏;雙饋調(diào)速異步電機(jī)在風(fēng)力發(fā)電中的應(yīng)用[J];上海大中型電機(jī);2003年01期

3 馬宏忠,胡虔生,張利民,韓敬東;異步電機(jī)的失電殘余電壓研究[J];中小型電機(jī);2005年05期

4 章文裕;徐錦才;;異步電機(jī)并網(wǎng)發(fā)電技術(shù)在福建大田縣的實(shí)踐[J];小水電;2006年01期

5 胡小明;;異步電機(jī)的啟動(dòng)與調(diào)速[J];家電檢修技術(shù);2006年18期

6 畢衛(wèi)紅;張巧玲;趙希;;基于異步電機(jī)工作模型的設(shè)計(jì)[J];科學(xué)之友(B版);2008年06期

7 本刊通訊員;;第二期異步電機(jī)設(shè)計(jì)培訓(xùn)及研討班圓滿結(jié)束[J];電機(jī)技術(shù);2008年03期

8 章文裕;異步電機(jī)并網(wǎng)發(fā)電的要領(lǐng)和體會(huì)[J];小水電;1995年03期

9 吳振華;負(fù)載有準(zhǔn)恒速要求時(shí)異步電機(jī)的選用[J];中小型電機(jī);1996年06期

10 任炳禮,王曉燕;表面開環(huán)形槽的復(fù)合轉(zhuǎn)子異步電機(jī)的參數(shù)計(jì)算[J];大電機(jī)技術(shù);2000年02期

相關(guān)會(huì)議論文 前10條

1 孟甲凡;;基于Matlab/SIMULINK的異步電機(jī)的建模與仿真[A];第六屆河南省汽車工程科技學(xué)術(shù)研討會(huì)論文集[C];2009年

2 邰永;劉趙淼;;小型異步電機(jī)機(jī)殼表面的通風(fēng)計(jì)算[A];北京力學(xué)會(huì)第15屆學(xué)術(shù)年會(huì)論文摘要集[C];2009年

3 李國(guó)進(jìn);胡常林;侯緒達(dá);;異步電機(jī)離線參數(shù)辨識(shí)[A];中南六�。▍^(qū)）自動(dòng)化學(xué)會(huì)第二十九屆學(xué)術(shù)年會(huì)論文集[C];2011年

4 趙波;厲虹;;異步電機(jī)定位控制方法研究[A];冶金自動(dòng)化信息網(wǎng)年會(huì)論文集[C];2004年

5 趙波;厲虹;;異步電機(jī)定位控制方法研究[A];全國(guó)冶金自動(dòng)化信息網(wǎng)年會(huì)論文集[C];2004年

6 徐建華;姚來(lái)強(qiáng);;異步電機(jī)直接轉(zhuǎn)矩控制系統(tǒng)的設(shè)計(jì)與仿真[A];自動(dòng)化技術(shù)與冶金流程節(jié)能減排——全國(guó)冶金自動(dòng)化信息網(wǎng)2008年會(huì)論文集[C];2008年

7 姚來(lái)強(qiáng);徐建華;;異步電機(jī)直接轉(zhuǎn)矩控制系統(tǒng)的設(shè)計(jì)與仿真[A];第九屆全國(guó)電技術(shù)節(jié)能學(xué)術(shù)會(huì)議論文集[C];2007年

8 李謙祥;胡靜濤;;基于虛擬儀器的異步電機(jī)試驗(yàn)系統(tǒng)與應(yīng)用[A];第三屆全國(guó)虛擬儀器大會(huì)論文集[C];2008年

9 潘偉;許波;孫曉東;朱q

本文編號(hào)：2199013