电子课件《电工英语(第三版)》A013750电工英语电子课件unit5.ppt

1、ELECTRICAL ENGLISH英语英语电工Unit 1 Job and WorkplaceUnit 2 Electrical Tools and MaterialsUnit 3 House WiringUnit 4 Measuring InstrumentsContents Unit 5 Motors and TransformersLesson 13 Overview of MotorsLesson 14 installation and maintenance of motorsLesson 15 TransformersUnit 5 Motors and TransformersL

2、esson 13 Overview of MotorsGoal Identify basic types of motorLook and Study DialogueReadingFurther StudyWords and Phrases Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study135Words and PhrasesLook up the words and phrases below in a dictionary.Fill in the blanks with both Chinese and Engl

3、ish answers according to the pictures.induction motor；vacuum cleaner；disk drive；ventilation fan；gear；wound rotor1._2._3._vacuum cleaner真空吸尘器ventilation fan通风风扇gear齿轮 Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study135Words and PhrasesLook up the words and phrases below in a dictionary.F

4、ill in the blanks with both Chinese and English answers according to the pictures.induction motor；vacuum cleaner；disk drive；ventilation fan；gear；wound rotor4._5._6._wound rotor绕线转子induction motor异步电机disk drive磁盘驱动器 Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study75Words and PhrasesPeter

5、（B）购买了一台新洗衣机，Jane（A）见到后，提出了几个问题。A:Peter.Is that your new washing machine?B:Yes,John.Ive just bought it for a few days.A:How much electricity and water dose it use?B:This model uses about 43 liters of water and 1.02 kWh of electricity per cycle.A:Wow!What good energy performance!What is its maximum s

6、pin speed?B:Im not clear.Why do you ask me this question?A:The spin speed is directly related to the quality of motor.B:Oh.Ive read the product manual but not notice this parameter A:Just read the product specification.You can find this parameter.13 Unit 3 Lesson 4 Look and Study Dialogue Reading Fu

7、rther Study75Words and PhrasesA.Choose the best answer1.Peter bought the new washing machine last month.Yes No2.The washing machine saves energy.Yes No3.Peter knows what the spin speed of washing machine is.Yes No13NoYesNo Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study75Words and Phra

8、sesB.Reorder the letters with your partner.13LettersWordsy c cle d sp ee nu ma al ma ne chi electri city ation specific specificationcyclespeedmanualmachineelectricity Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study75Words and Phrases电机的作用与类型电机的作用与类型Electric motors are used to power hu

9、ndreds of the devices that we use in everyday life,such as computer disks,refrigerators,washing machines,food mixers,vacuum cleaners,DVD players,ventilation fans,elevators,and so on.13 Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study75Words and Phrases电机的作用与类型电机的作用与类型Electric motors are

10、 broadly classified into two categories:AC and DC.The type of motor best suited to operate a particular piece of equipment can be different for different types of machines.Machines that employ gears generally require a motor that can start at reduced speed gradually.Wound rotor induction motors or s

11、quirrel cage motors controlled by variable frequency drives are generally excellent choices for this requirement.Machines that require a long starting period require a motor with high starting torque and relatively low starting current.Squirrel cage motors or synchronous motors are a good choice for

12、 these types of loads.Synchronous motors have an advantage in that they can provide power factor correction for themselves or other inductive loads connected to the same power line.13 Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study75Words and PhrasesA.Read the passage again and answer

13、the questions.131.Electric motors are used to hundreds of the devices that we use in everyday life.2.are the main types of Electric motor.3.motors can provide power factor correction for themselves.powerAC and DCSynchronous Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study75Words and Phr

14、asesB.Match the English with the Chinese.Draw lines.13hundreds of the devices功率因数power factor启动电流squirrel cage motor上百种装置starting current.鼠笼式电动机Wound rotor绕线转子 Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study75Words and PhrasesC.Learn the important grammar and phrase in the text.1.suit

15、to适合于The type of motor best suited to operate a particular piece of equipment can be different for different types of machines.机器类型不同，最适合驱动某个特定部件的电动机类型也不同。练习：这种永磁同步电动机被设计成适用于车床。提示：permanent magnet,lathe英文：2.in that因为Synchronous motors have an advantage in that they can provide power factor correctio

16、n for themselves or other inductive loads connected to the same power line.同步电机的优点在于，它们可以调整自身或其它与之连接的同一电力线路上电感负载的功率因数。练习：她很幸运，因为有朋友们帮她。提示：fortunate中文：13The type of permanent magnet synchronous motor is designed to be suited to lathe.She was fortunate in that she had friends to help her.Unit 3 Lesson

17、 4 Look and Study Dialogue Reading Further Study75Words and PhrasesA.Component of Electric Motor.131.electrical supply/电源；mutator/换向；3.armature/电枢、转子；4.field windings/励磁绕组；5.drive shaft/驱动轴；6.brush/电刷；7.bearing/轴承；8.motor frame/电动机架；Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study75Word

18、s and PhrasesB.Sinotech Motors.Sinotech Motors can ensure（确保)）excellent Induction Motors from China and is very price competitive（竞争的）.Sinotech Motors has manufactured QS-9000 and ISO certified Induction Motors in China for over 15 years.Sinotech Motors is dedicated to（从事于）delivering induction motor

19、s from China to you at lower prices but the same quality,service and terms（条款）as a domestic（国内）supplier（供应商）.Sinotech Induction Motors are engineered（设计）in the U.S.and manufactured in China.13Shaded Pole（罩极）Motors Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study75Words and Phrases13mach

20、ine mi:n n.机械，机器electricity,ilektristi n.电liter li:t n.公升per p prep.每一cycle saikl n.循环，周期performance pf:mns n.性能spin spin n.旋转speed spi:d n.速度，速率directly direktli adv.直接地relate rileit vi.涉及manual mnjul n.指南，手册parameter prmit n.参数，系数specification,spesifikein n.规格，说明书power pau vt.供以动力disk disk n.磁盘mix

21、er miks n.搅拌器vacuum vkjum adj.真空的cleaner kli:n n.洗洁器ventilation,ventilein n 通风fan fn n.风扇broadly br:dli adv.概括地category ktiri n.种类suit sju:t vi.合适particular ptikjul adj.独有的employ impli vt.使用，采用gear i n.齿轮generally denrli adv.通常地，普遍地reduced ridju:st adj.减少的 Unit 3 Lesson 4 Look and Study Dialogue Rea

22、ding Further Study75Words and Phrases13gradually grdjuli adv.逐步地wind wind vt.缠绕rotor rut n.转子induction indkn n.电磁感应squirrel skw:rl n.松鼠control kntrul vt.控制；n.控制variable vribl adj.可变的frequency frikwnsi n.频率drive draiv n.驱动choice tis n.选择torque t:k n.转矩，扭矩relatively reltivli adv.相对地synchronous sikrns

23、adj.同步的factor fkt n.因素，因数correction krekn n.改正，修正kWh abbr.千瓦小时（kilowatt hour）be related to与有关hundreds of许许多多，成百的vacuum cleaner吸尘器and so on 等等suit to适合于wound rotor绕线转子induction motor异步电机squirrel cage motor鼠笼式电动机synchronous motor同步电机power factor功率因数inductive load电感负载Lesson 14 installation and maintena

24、nce of motorsGoal learn useful expressions for installation and maintenance of motorLook and Study DialogueReadingFurther StudyWords and Phrases Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study145Words and PhrasesLook up the words and phrases below in a dictionary.Fill in the blanks wit

25、h both Chinese and English answers according to the pictures.1._2._3._concrete basepower plantcontrol panelpower plant发电厂control panel控制面板concrete base混凝土基础 Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study75Words and Phrases在新建的发电厂，两个电气工作人员正在谈论他们今天要做的工作。A:what shall we do today？B:Test t

26、he equipments of power plant.All the electric circuits of high-voltage motors will be regulated,including their starting,stopping,protecting,interlocking,and their signals and so on.A:Are the ones you mentioned going to be interactively controlled?B:Yes.All the on-site-signals will be tested on how

27、they return to the Main Control Panel.14 Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study75Words and Phrases在新建的发电厂，两个电气工作人员正在谈论他们今天要做的工作。A:Thats to say the operators will operate the start or stop switch by receiving feedback signals on the motors.B:quite rightA:What do we do if there

28、is a fault?B:Solve it yourself according to the operational regulations.First,check all the circuits on the spot.Second,if theres no problem,test the signals coming from the control room and test the signals of the computers.14 Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study75Words and

29、 PhrasesA.Listen to the dialogue again and answer the questions.1.They will test of power plant.2.All the on-site-signals will be tested on how they return to .3.If there is a fault,they will solve it according to .14the equipmentthe Main Control Panel.the operational regulations Unit 3 Lesson 4 Loo

30、k and Study Dialogue Reading Further Study75Words and PhrasesB.Reorder the letters with your partner.14LettersWordsau f lt operat or la regu tion tion opera al operationalfaultoperatorregulation Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study75Words and Phrases电机安装与维护电机安装与维护The correct

31、 handling,positioning,fixing and aligning of a motor are very important.Although it is a strong piece of machinery,great care should be taken.When transporting or positioning it,not to crack the casing or damage the feet.Once the motor is in position it has to be fixed and aligned and this procedure

32、 will depend on the type of linking used and the size of machine.Very large motors are usually fixed to a concrete base with fixing bolts.14 Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study75Words and Phrases电机安装与维护电机安装与维护Motor maintenance begins when the motor is installed.Records on t

33、he motor are started,and notations on the conditions of operation are made.Each motor has its own individual record for maintenance and repair.These records are not only important to the electrician who must maintain the machine,but also to management.14 Unit 3 Lesson 4 Look and Study Dialogue Readi

34、ng Further Study75Words and PhrasesA.Read the dialogue and circle Yes or No.141.Motor isnt a strong piece of machinery.Yes No2.The large motors are usually fixed to a wooden base.Yes No3.Each motor has its own individual record for maintenance and repair.Yes NoNoYesYes Unit 3 Lesson 4 Look and Study

35、 Dialogue Reading Further Study75Words and PhrasesB.Match the English with the Chinese.Draw lines.14correct positioning 紧固螺栓a piece of machinery 正确定位fixing bolt 破坏外包装crack the casing 一件机器individual record 各自的记录 Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study75Words and PhrasesC.Learn t

36、he important grammar and phrase in the text.1.once一旦就Once the motor is in position it has to be fixed and aligned and this procedure will depend on the type of linking used and the size of machine.一旦电机（安装）就位，就要加以固定和调正，这个过程与其连接轴的类型和机器的尺寸紧密相关。练习：We didnt know how we would cope once the money had gone.

37、中文：2.Not onlybut also不但，而且These records are not only important to the electrician who must maintain the machine,but also to the management.这些记录不仅对承担维护工作的电工很重要，而且对管理人员也很重要。练习：不但我喜欢这部电影，我妈妈也很喜欢。英文：14一旦钱花光了，我们就不知道该怎么办了。Not only do I enjoy this movie,but also my mother.Unit 3 Lesson 4 Look and Study Dia

38、logue Reading Further Study75Words and PhrasesA.Power Station.14A power station(also referred to as a generating station,power plant,or powerhouse)is an industrial facility for the generation of electric energy.At the center of nearly all power stations is a generator（发电机）,a rotating machine that co

39、nverts mechanical（机械的）energy into electrical energy by creating relative motion（运动）between a magnetic field（磁场）and a conductor.The energy source harnessed（点火）to turn the generator varies widely.It depends chiefly（主要）on which fuels（燃料）are easily available and on the types of technology（技术）that the po

40、wer company has access to.Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study75Words and PhrasesB.Pre-installation requirements of Motors.Handling and lifting of electric motors must only be undertaken(承担)by authorized（授权的）personnel（人员）.Full product documentation（文件）and operating instructi

41、ons must be available together with tools and equipment necessary for safe working practice.14 Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study75Words and Phrases14regulate rejuleit vt.调节interlock,intlk v.互锁，连锁interactively,intrktivli adv.交互地operator preit n.操作员feedback fi:dbk n.反馈fault

42、 f:lt n.故障operational,preinl adj.操作的regulation,rejulein n.条例handle hndl vt.处理，操作，搬运position pzin vt.放置align lain vt.排列machinery mi:nri n.机械transport trnsp:t n.运输crack krk vt.使破裂casing keisi n.包装procedure prsi:d n.程序，步骤link lik vt.连接base beis n.基础bolt bult n.螺栓notation nutein n.记号 power plant 电厂on-si

43、te adj.现场的test on对进行测试Main Control Panel主控制板on the spot在现场control room控制室in position就位fix to固定于fixing bolt紧固螺栓Lesson 15 TransformersGoal Identify basic types of transformerLook and Study DialogueReadingFurther StudyWords and Phrases Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study155Wor

44、ds and PhrasesLook up the words and phrases below in a dictionary.Fill in the blanks with both Chinese and English answers according to the pictures.(power plant;step-up substation;transmission line;step-down substation;distribution power line;consumer.Unit 3 Lesson 4 Look and Study Dialogue Reading

45、 Further Study155Words and PhrasesLook up the words and phrases below in a dictionary.Fill in the blanks with both Chinese and English answers according to the pictures.1.2.3.;4.5.6.;power plant发电厂step-up substation升压变电站transmission line输电线stepped-down substation降压变电站distribution power line配电线路consu

46、mer用户 Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study75Words and PhrasesJane（B）在某变电站工作，Peter（A）是她的朋友。Peter对变电站很感兴趣，于是向Jane请教了一些问题。A:Jane,as you are the electrician at a substation,I want to learn some knowledge about the substation.B:You are a curious man,Peter.The electric power syste

47、m consists of the generators,the electric power networks and the consumers.The electric power network includes substations,transmission lines,and distribution networks.A:Introduce something about the substation?15 Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study75Words and PhrasesJane（B

48、）在某变电站工作，Peter（A）是她的朋友。Peter对变电站很感兴趣，于是向Jane请教了一些问题。B:Yes,of course.The instrument transformer is one of the main equipment in the substation.Some can be used to step up the voltage for the purpose of transmitting the power to the load centers.A:I know.Its not economical to transmit the huge power a

49、t this voltage.Therefore,it needs to be stepped up before transmission.B:Thats right!A:It must be hard to transport the giant transformer to the substation,isnt it?B:Yes,its indeed.The common practice is to transport it by rail and by the giant special-purpose trailer.15 Unit 3 Lesson 4 Look and Stu

50、dy Dialogue Reading Further Study75Words and PhrasesA.Choose the best answer.1.Peter asks John some questions about the substation because .A.he is a curious man.B.he is invited to visit the substation.C.he is an electrician.D.he is a contractor.2.The electric power network includes .A.generators an