【正文】 采用什么類型的控制設(shè)備？起初，功率晶體管線性放大器，輸出電壓高達(dá)100伏左右，后來，晶閘管轉(zhuǎn)換器被用來作為良好，在接近70年代末，直流轉(zhuǎn)換器基于斬波開關(guān)晶體管來脫穎而出。伺服驅(qū)動(dòng)器也受到這一事態(tài)發(fā)展的影響：在對(duì)改善動(dòng)態(tài)響應(yīng)要求認(rèn)為，發(fā)展開始走在兩個(gè)不同的方向。 伺服驅(qū)動(dòng)器開發(fā) 術(shù)語“伺服驅(qū)動(dòng)”意味著某種形式的輔助驅(qū)動(dòng)，這很可能是40年以前真正在機(jī)床行業(yè)，當(dāng)時(shí)電機(jī)，eglathes，往往仍用手工驅(qū)動(dòng)。 單詞“伺服”來自拉丁文“塞爾武斯”，可譯為仆人，奴隸或幫手。這些事態(tài)發(fā)展導(dǎo)致了重點(diǎn)在遠(yuǎn)離直流驅(qū)動(dòng)系統(tǒng)對(duì)交流電動(dòng)機(jī)的轉(zhuǎn)變. 這對(duì)交流的趨勢(shì)，特別是在同步電動(dòng)機(jī)伺服系統(tǒng)是，這是顯而易見的實(shí)施以前幾乎總是用直流技術(shù)。附圖1：定子沖片圖附圖2：繞組連接圖附圖3：轉(zhuǎn)子總裝圖附圖4：總裝圖 NANCHANG UNIVERSITY外文資料原文及譯文（2006—2010年）學(xué) 院：信息工程學(xué)院 系： 電氣與自動(dòng)化 專 業(yè)： 電氣工程及其自動(dòng)化 班 級(jí)： 電機(jī)電器061班 學(xué) 號(hào)： 6101106047 學(xué)生姓名： 丁康峰 指導(dǎo)教師： 肖倩華 起訖日期： — Servo motor design and selectionDevelopments in the fields of electronics and materials processing have changed the situation in the world of drive technology has to date mainly employed DC biggest drawback of AC motors pared to DC motors was their inferior speed developments in the field of electronics,particularly the microcontroller,mean thatan appropriate control system can now be included to pensate for this.These developments have led to a shift in emphasis in drive systems away from DC towards trend towards AC synchronous motors is particularly evident in servo systems,whichwere previously almost always implemented using DC technology.New,powerful permanent magnets made of samariumcobalt and neodymium iron boron canincrease the performance of the motor as a result of their high energy density,while at the same timereducing the mass of the a result,the dynamic properties of the drive are improved andthe frame size of the motor reduced.Definition of servo technologyMany applications place high demands on modern drive technology with regard to:q positioning accuracyq speed accuracyq speed control rangeq torque stabilityq overload capabilityq dynamic performanceDemands on the dynamic properties of a drive,in other words its time response,arose as a result of ever faster machining processes,increases in machining cycles and the associated production efficiency of accuracy of a drive is very often instrumental in determining for which applications a drive system can be used.A modern,dynamic drive system has to be able to satisfy these requirements.A definition of servo drivesServo drives are drive systems that show a dynamic and accurate response over a wide speed range and are also capable of coping with overload situations.The word“servo”es from the Latin“servus”,which can be translated as servant,slave or helper.In the machine tool sector,servo drives were primarily auxiliary ,this situation has changed,so that nowadays main drives are also implemented using servo technology.In this volume,we have used the terms“servo drive”and“dynamic drive”to mean one and the same always refer to AC permanentfield synchronous motors and their associated control systemsDevelopment of servo drivesThe term“servo drive”suggests some sort of auxiliary may well have been true 40 years ago in the machine tool industry,when the machines,were often still driven by ,hydraulic or fixedspeed AC motors were only used where high levels of torque were was the skill of the lathe operator and the manual measurements and checks he carried out that determined how quickly and accurately the workpiece could be machined.On the other side was the main drive,which used pneumatic,hydraulic or electrical means to achieve a more or less constant and controlled main spindle speedTechnical development of servo drivesInitially,hydraulic and pneumatic servo drives dominated the DC drive became more important again in the sixties with the advent of silicon semiconductors.Servo drives were also affected by this development:In view of the requirement for improved dynamic response,development started to go in two separate directions.The first saw the required reduction in the mass moment of inertia of the motor in the shape of an extremely short,discshaped and ironfree second concentrated on a long,very thin rotor.In both instances,the start of the seventies saw permanent magnets being used instead of excitation meant torque was produced more quickly and resulted in greater efficiency.What type of control equipment was used?At first,linear amplifiers with power transistors and output voltages up to about 100 ,thyristor converters were used as well and towards the end of the seventies,DC chopper converters based on switching transistors came to the fore.This pensated to a great extent for the initial low level of efficiency of the electric voltage that could be output by the DC motors was nevertheless still only about 200 V as a result of the insufficient blocking voltage of the transistors and the limited voltage between the segments of the mutators.DC chopper converters had to be connected to the mains via an isolating the same time,this transformer isolated the actuator from the mains.Control of both speed and torque was analogue,with all the associated problems of susceptibility of low signal voltages to interference across the wide speed range typical of servo DC tachometer was used as feedback unit to measure actual speed.The development of frequency inverters,initially based on thyristors,later on power transistors,led to the increasing use of lowwear AC squirrelcage motors and standard motors in the case of drives not requiring such precise control.The search for brushless motors that could be used in servo drives has been underway since themidseventies.A reversal of the principle of the conventional DC motor appeared to be a promising solution:armature in the stators,fieldexcitation in the brushless DC motor or electronic mutator motor was born.In principle,this motor is a permanentfield synchronous motor that requires a simple position encoder issuing 6 signals per revolution to determine the position of the rotor.In addition to electronic mutation and the