直流電動(dòng)機(jī)外文翻譯

1、<p><b>　　外文文獻(xiàn)</b></p><p>　　1. INTRODUCTION </p><p>　　Electric Drive Technology Development 1.1 Current Situation 30 Over the years, the DC motor drive has undergone significant

2、 changes. First of all, replacing a rectifier, thyristor rectifier device to replace the conventional long-standing group of DC motors and generators of mercury rectifier DC electric drive device to complete a big leap f

3、orward. At the same time, control circuit has achieved a high level of integration and miniaturization, high reliability and low cost. More than technology,</p><p>　　1.2. Computer control and status of the d

4、evelopment of motor Relatively simple computer control of the motor, as long as the use of microcomputer control relay or electronic switching elements so that the circuit open or off it. In a variety of machine tool eq

5、uipment and production lines, the now commonly used with the programmable computer controller, in accordance with the laws of certain types of motor control action. For the complex motor control, then use computer contro

6、l motor voltage, cu</p><p>　　2. Speed and current dual closed-loop speed control system of the two regulator cascade connection for the outer speed feedback loop, current loop for the inner ring. The speed r

7、egulator output current is given, the output amplitude is limited to the maximum current value. Adjust the limit of small amplitude or current-feedback coefficient can be adjusted easily to change the maximum current. In

8、 effect, the braking process, the speed regulator quickly into saturation, the output amplitude limit </p><p>　　3. Current feedback loop allows the system to enhance the anti-interference ability, role in th

9、e current loop to the channel on the role of all the disturbances, such as disturbances such as voltage, current loop by regulating the timely inhibited, so that speed is not affected or less affected by disturbances. Cu

10、rrent speed of the inner ring also played in the transformation of the target structure and regulation of the role of parameters to accelerate the speed of adjustment in response to the</p><p>　　4. System Si

11、mulation MathWorks Inc. MATLAB is introduced in 1984 a set of numerical simulation software, is divided into the total package and a number of kits, you can achieve the numerical analysisDifferent branch of mathematics

12、it to function in the form of algorithms classified as libraries, the use of direct calls to these functions and give the actual parameters of the problem can be solved quickly and accurately. that is, to a series of co

13、nnecting module, a complex model of the system. </p><p>　　Building, simulation and analysis of dynamic systems on the most widely used software package, it supports linear and non-linear systems, could creat

14、e a continuous time, discrete-time system or a mixture of the two models. System is also able to multi-sampling frequency (Multirate), which is different in different systems can combine the sampling frequency. Simulink

15、 of MATLAB as an additional component, a system used to provide most of the work of modeling and simulation platform. Simulink is a</p><p><b>　　譯文</b></p><p><b>　　1.引言</b>

16、;</p><p>　　1.1電氣傳動(dòng)技術(shù)發(fā)展現(xiàn)狀</p><p>　　三十多年來(lái)，直流電機(jī)傳動(dòng)經(jīng)歷了重大的變革。首先實(shí)現(xiàn)了整流器的更新?lián)Q代，以晶閘管整流裝置取代了習(xí)用已久的直流發(fā)電機(jī)電動(dòng)機(jī)組及水銀整流裝置使直流電氣傳動(dòng)完成一次大的躍進(jìn)。同時(shí)，控制電路已經(jīng)實(shí)現(xiàn)高集成化、小型化、高可靠性及低成本。以上技術(shù)應(yīng)用，使直流調(diào)速系統(tǒng)的性能指標(biāo)大幅提高，應(yīng)用范圍不斷擴(kuò)大。直流調(diào)速技術(shù)不斷發(fā)展，走向成熟

17、化、完善化、系列化、標(biāo)準(zhǔn)化，在可逆脈寬調(diào)速、高精度的電氣傳動(dòng)領(lǐng)域中仍然難以替代。</p><p>　　1.2 微機(jī)控制電機(jī)的發(fā)展和現(xiàn)狀 </p><p>　　比較簡(jiǎn)單的電機(jī)微機(jī)控制，只要用微機(jī)控制繼電器或電子開(kāi)關(guān)元件使電路開(kāi)通或關(guān)斷就可以了。在各種機(jī)床設(shè)備及生產(chǎn)流水線中，現(xiàn)在已普遍采用帶微機(jī)的可編程控制器，按一定的規(guī)律控制各類(lèi)電機(jī)的動(dòng)作。對(duì)于復(fù)雜的電機(jī)控制,則要用微機(jī)控制電機(jī)的電壓、電流、

18、轉(zhuǎn)矩、轉(zhuǎn)速、轉(zhuǎn)角等等,使電機(jī)按給定的指令準(zhǔn)確工作。通過(guò)微機(jī)控制，可使電機(jī)的性能有很大的提高。</p><p>　　2 單閉環(huán)控制直流脈寬調(diào)速系統(tǒng)</p><p>　　本章主要討論單閉環(huán)直流調(diào)速系統(tǒng)。由于開(kāi)環(huán)控制的直流調(diào)速系統(tǒng)靜態(tài)轉(zhuǎn)速降較大，不能滿足調(diào)速指標(biāo)的要求，因此需采用轉(zhuǎn)速負(fù)反饋或電壓負(fù)反饋組成閉環(huán)調(diào)速系統(tǒng)。但是單閉環(huán)系統(tǒng)并不能滿足本課題調(diào)速系統(tǒng)的要求。</p><

19、p>　　3 微機(jī)控制雙閉環(huán)可逆調(diào)速直流PWM調(diào)速系統(tǒng)原理設(shè)計(jì)</p><p>　　轉(zhuǎn)速、電流雙閉環(huán)調(diào)速系統(tǒng)的兩個(gè)調(diào)節(jié)器串級(jí)連接，轉(zhuǎn)速反饋環(huán)為外環(huán)，電流環(huán)為內(nèi)環(huán)。速度調(diào)節(jié)器的輸出即為電流給定，其輸出限幅值即為最大電流給定值。調(diào)整限幅值的小或調(diào)整電流反饋系數(shù)就可方便地改變最大電流。在起、制動(dòng)過(guò)程中，速度調(diào)節(jié)器很快入飽和，輸出限幅值為電流環(huán)提供了最大電流給定，電流調(diào)節(jié)器為PI調(diào)節(jié)器，在它的調(diào)節(jié)作用下使電流保持在最

20、大值，這時(shí)系統(tǒng)實(shí)際上為一個(gè)恒值電流調(diào)節(jié)系統(tǒng)。由于電流環(huán)的調(diào)節(jié)作用使系統(tǒng)的起、制動(dòng)過(guò)渡過(guò)程中電流的波形接近于理想的最佳過(guò)渡波形。當(dāng)轉(zhuǎn)速超調(diào)后，速度調(diào)節(jié)器退出飽和，對(duì)轉(zhuǎn)速起主要調(diào)節(jié)作用，電流環(huán)成為電流隨動(dòng)系統(tǒng)。</p><p>　　電流反饋環(huán)使得系統(tǒng)的抗干擾能力增強(qiáng)，作用在電流環(huán)前向通道上的一切擾動(dòng)作用，如電網(wǎng)電壓擾動(dòng)等，受到電流環(huán)的及時(shí)調(diào)節(jié)所抑制，使轉(zhuǎn)速不受或少受擾動(dòng)的影響。電流內(nèi)環(huán)還起到改造轉(zhuǎn)速外環(huán)中調(diào)節(jié)對(duì)象結(jié)構(gòu)

21、及參數(shù)的作用，加快了轉(zhuǎn)速環(huán)的調(diào)節(jié)響應(yīng)過(guò)程。在特性上，轉(zhuǎn)速環(huán)的調(diào)節(jié)作用保證了系統(tǒng)無(wú)靜差，電流環(huán)的作用使系統(tǒng)具有較理想的挖土機(jī)下垂特性。</p><p><b>　　4 系統(tǒng)仿真</b></p><p>　　MATLAB是由MathWorks公司1984年推出的一套數(shù)值計(jì)算軟件，分為總包和若干個(gè)工具箱，可以實(shí)現(xiàn)數(shù)值分析、優(yōu)化、統(tǒng)計(jì)、偏微分方程數(shù)值、自動(dòng)控制、信號(hào)處理、圖像

22、處理等各個(gè)領(lǐng)域的計(jì)算和圖形顯示功能。它將不同數(shù)學(xué)分支的算法以函數(shù)的形式分類(lèi)成庫(kù)，使用時(shí)直接調(diào)用這些函數(shù)并賦予實(shí)際參數(shù)就可以解決問(wèn)題，快速而且準(zhǔn)確。</p><p>　　Simulink是MathWorks公司于1990年推出的產(chǎn)品，是用于MATLAB下建立系統(tǒng)框圖和仿真的環(huán)境。從名字上看，立即就能看出該程序有兩層含義，首先，“ Simu‘’一詞表明它可以用于計(jì)算機(jī)仿真，而“Link”一詞表明它能進(jìn)行系統(tǒng)連接，即把

23、一系列模塊連接起來(lái)，構(gòu)成復(fù)雜的系統(tǒng)模型。最近幾年，后來(lái)崛起的Simulink已成為學(xué)術(shù)領(lǐng)域及工業(yè)領(lǐng)域</p><p>　　在構(gòu)建、仿真與分析動(dòng)態(tài)系統(tǒng)上使用最為廣泛的軟件包，它支持線性及非線性系統(tǒng)，能創(chuàng)建連續(xù)時(shí)間、離散時(shí)間或者兩者混合的系統(tǒng)模型。系統(tǒng)也能夠是多采樣頻率的(Multirate)，也就是不同的系統(tǒng)能夠以不同的采樣頻率結(jié)合起來(lái)。</p><p>　　Simulink作為MATLAB

24、的一個(gè)附加組件，用來(lái)提供一個(gè)系統(tǒng)極的建模與動(dòng)態(tài)仿真工作平臺(tái)。Simulink是用模塊組合的方法來(lái)使用戶能夠快速、準(zhǔn)確地創(chuàng)建動(dòng)態(tài)系統(tǒng)的計(jì)算機(jī)模型的，特別對(duì)于復(fù)雜的非線性，它的效果更為明顯。</p><p>　　Simulink模型可以用來(lái)模擬線性或非線性、連續(xù)或離散或者兩者混合系統(tǒng),也就是說(shuō)它可以用來(lái)模擬幾乎所有可遇到的動(dòng)態(tài)系統(tǒng)。另外，Simulink還提供一套圖形動(dòng)畫(huà)的處理方法，使用戶可以方便地觀察到仿真的整個(gè)過(guò)