異步電機弱磁控制系統(tǒng)的設計
[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.
【學位授予單位】:華中科技大學
【學位級別】:碩士
【學位授予年份】:2014
【分類號】:TM343;TM301.2
【相似文獻】
相關期刊論文 前10條
1 薛福連;線繞式異步電機的維修[J];微電機(伺服技術);2002年05期
2 陳志宏;雙饋調速異步電機在風力發(fā)電中的應用[J];上海大中型電機;2003年01期
3 馬宏忠,胡虔生,張利民,韓敬東;異步電機的失電殘余電壓研究[J];中小型電機;2005年05期
4 章文裕;徐錦才;;異步電機并網發(fā)電技術在福建大田縣的實踐[J];小水電;2006年01期
5 胡小明;;異步電機的啟動與調速[J];家電檢修技術;2006年18期
6 畢衛(wèi)紅;張巧玲;趙希;;基于異步電機工作模型的設計[J];科學之友(B版);2008年06期
7 本刊通訊員;;第二期異步電機設計培訓及研討班圓滿結束[J];電機技術;2008年03期
8 章文裕;異步電機并網發(fā)電的要領和體會[J];小水電;1995年03期
9 吳振華;負載有準恒速要求時異步電機的選用[J];中小型電機;1996年06期
10 任炳禮,王曉燕;表面開環(huán)形槽的復合轉子異步電機的參數計算[J];大電機技術;2000年02期
相關會議論文 前10條
1 孟甲凡;;基于Matlab/SIMULINK的異步電機的建模與仿真[A];第六屆河南省汽車工程科技學術研討會論文集[C];2009年
2 邰永;劉趙淼;;小型異步電機機殼表面的通風計算[A];北京力學會第15屆學術年會論文摘要集[C];2009年
3 李國進;胡常林;侯緒達;;異步電機離線參數辨識[A];中南六。▍^(qū))自動化學會第二十九屆學術年會論文集[C];2011年
4 趙波;厲虹;;異步電機定位控制方法研究[A];冶金自動化信息網年會論文集[C];2004年
5 趙波;厲虹;;異步電機定位控制方法研究[A];全國冶金自動化信息網年會論文集[C];2004年
6 徐建華;姚來強;;異步電機直接轉矩控制系統(tǒng)的設計與仿真[A];自動化技術與冶金流程節(jié)能減排——全國冶金自動化信息網2008年會論文集[C];2008年
7 姚來強;徐建華;;異步電機直接轉矩控制系統(tǒng)的設計與仿真[A];第九屆全國電技術節(jié)能學術會議論文集[C];2007年
8 李謙祥;胡靜濤;;基于虛擬儀器的異步電機試驗系統(tǒng)與應用[A];第三屆全國虛擬儀器大會論文集[C];2008年
9 潘偉;許波;孫曉東;朱q
本文編號:2199013
本文鏈接:http://sikaile.net/kejilunwen/dianlilw/2199013.html