电子课件《电工英语(第三版)》A013750电工英语电子课件unit5

1、ELECTRICAL ENGLISH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 TransformersLes

2、son 13 Overview of MotorsGoal Identify basic types of motorLook and Study DialogueReadingFurther StudyWords and PhrasesLook 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 English answers accord

3、ing 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Look and Study Dialogue Reading Further Study135Words and PhrasesLook up the words and phrases below in a dictionary. Fill in the blanks with both Chines

4、e 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Look and Study Dialogue Reading Further Study75Words and PhrasesPeter（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 y

5、our 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 spin speed?B: Im not clear. Why do you ask

6、 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.13Look and Study Dialogue Reading Further Study75Words and PhrasesA. Choose the best an

7、swer1. 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 No13NoYesNoLook and Study Dialogue Reading Further Study75Words and PhrasesB. Reorder the letters with your partner.13LettersWordsy c

8、 cled sp ee nu ma alma ne chielectri cityation specific specificationcyclespeedmanualmachineelectricityLook and Study Dialogue Reading Further Study75Words and Phrases电机的作用与类型Electric motors are used to power hundreds of the devices that we use in everyday life, such as computer disks, refrigerators

9、, washing machines, food mixers, vacuum cleaners, DVD players, ventilation fans, elevators, and so on.13Look and Study Dialogue Reading Further Study75Words and Phrases电机的作用与类型Electric motors are broadly classified into two categories: AC and DC. The type of motor best suited to operate a particular

10、 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 squirrel cage motors controlled by variable frequency drives are generally excellent choices for this

11、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 these types of loads. Synchronous motors have an advantage in that they can provide power factor c

12、orrection for themselves or other inductive loads connected to the same power line.13Look and Study Dialogue Reading Further Study75Words and PhrasesA. Read the passage again and answer the questions.131. Electric motors are used to hundreds of the devices that we use in everyday life.2. are the mai

13、n types of Electric motor.3. motors can provide power factor correction for themselves.powerAC and DCSynchronousLook and Study Dialogue Reading Further Study75Words and PhrasesB. 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start

14、ing current.鼠笼式电动机Wound rotor绕线转子Look and Study Dialogue Reading Further Study75Words and PhrasesC. Learn the important grammar and phrase in the text.1. suit 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

15、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 correction 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

16、：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.Look and Study Dialogue Reading Further Study75Words and PhrasesA. Component of Electric Motor.131. electrical supply / 电源；2. commutator / 换向；3. arm

17、ature / 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；Look and Study Dialogue Reading Further Study75Words and PhrasesB. Sinotech Motors.Sinotech Motors can ensure（确保)）excellent Induction Motors from China and is very price competitive（竞争的）.

18、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 motors 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 Motor

19、s are engineered（设计）in the U.S. and manufactured in China.13Shaded Pole（罩极）MotorsLook and Study Dialogue Reading Further Study75Words and Phrases13machine 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.

20、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mixer 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

21、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Look and Study Dialogue Reading 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.

22、 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 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 cl

23、eaner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 maintenance of motorsGoal learn useful expressions for installation and maintenance of motorLook and Study DialogueReadingFurther

24、 StudyWords and PhrasesLook and Study Dialogue Reading Further Study145Words 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._concrete basepower plantcontrol panelpower plant发电厂control panel控制面

25、板concrete base混凝土基础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 the equipments of power plant. All the electric circuits of high-voltage motors will be regulated, including their starting, stopping, protecting, interl

26、ocking, 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 they return to the Main Control Panel.14Look 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

27、 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 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

28、signals coming from the control room and test the signals of the computers.14Look and Study Dialogue Reading Further Study75Words and 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. I

29、f there is a fault, they will solve it according to .14the equipmentthe Main Control Panel . the operational regulationsLook and Study Dialogue Reading Further Study75Words and PhrasesB. Reorder the letters with your partner.14LettersWordsau f ltoperat orla regu tiontion opera aloperationalfaultoper

30、atorregulationLook and Study Dialogue Reading Further Study75Words and Phrases电机安装与维护The correct 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 cas

31、ing or damage the feet. 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. Very large motors are usually fixed to a concrete base with fixing bolts.14Look and Study Dialogue Reading Further Study75Words and

32、 Phrases电机安装与维护Motor maintenance begins when the motor is installed. Records on the 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

33、 the machine, but also to management. 14Look and Study Dialogue Reading 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 reco

34、rd for maintenance and repair. Yes NoNoYesYesLook and Study 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Look and Study Dialogue Reading Fu

35、rther Study75Words and PhrasesC. Learn the 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

36、how we would cope once the money had gone.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 al

37、so my mother.Look and Study Dialogue 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 gener

38、ator（发电机）, a rotating machine that converts 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 o

39、n the types of technology（技术）that the power company has access to.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

40、（文件）and operating instructions must be available together with tools and equipment necessary for safe working practice.14Look 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

41、fi:dbk n. 反馈fault 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

42、 nutein n. 记号power plant 电厂on-site 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 PhrasesLook and Study Dialogue Reading Fur

43、ther 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.(power plant; step-up substation; transmission line; step-down substation; distribution power line ; consumer.Look and Study Dialogue

44、Reading 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

45、 line配电线路consumer用户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 sy

46、stem 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?15Look and Study Dialogue Reading Further Study75Words and PhrasesJane（B）在某变电站工作，

47、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 at t

48、his 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.15Look and Study Dialogue

49、 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

50、d consumers.B. substations, transmission lines, and distribution networks.C. the instrument transformer.D. distribution networks.3. The common transportation method of giant transformer is by .A. ship; B. car.; C. special-purpose trailer; D. plane15ABCLook and Study Dialogue Reading Further Study75W

51、ords and PhrasesB. Reorder the letters with your partner.15LettersWordsa g i nttrail erious cur ce prac tical i economeconomicalgianttrailercuriouspracticeLook and Study Dialogue Reading Further Study75Words and Phrases变压器种类1. Step-up TransformerThe step-up transformer has a greater number of windin

52、gs on the side it outputs energy. It therefore increases voltage while reducing current.2. Step-down TransformerA step-down transformer reverses the winding ratio. 3. Isolation TransformerIsolation transformers provide galvanic isolation and are used to protect against electric shock, or to transfer

53、 power between two circuits which must not be connected together.15Look and Study Dialogue Reading Further Study75Words and Phrases变压器种类4. Auto-TransformerThe auto prefix refers to the single coil acting on itself. An autotransformer can be smaller, lighter and cheaper than a standard dual winding t

54、ransformer5. Current TransformerA current transformer allows use of an ammeter without having to insert it in series directly into a circuit. The primarys current can be calculated from the secondarys current.15Look and Study Dialogue Reading Further Study75Words and PhrasesA. List the main six type

55、s of transformer151._2._3._4._5._Step-up TransformerStep-down TransformerIsolation TransformerAuto-TransformerCurrent TransformerLook and Study Dialogue Reading Further Study75Words and PhrasesB. Match the English with the Chinese. Draw lines.15electric shock输出电能outputs energy电击dual-winding双绕组Look a

56、nd Study Dialogue Reading Further Study75Words and PhrasesC. Learn the important grammar and phrase in the text.1. refer to描述，涉及，与相关The auto prefix refers to the single coil acting on itself. “自耦”这个前缀描述的是自己（已完成变压）工作的的单线圈。练习：电气采样模块的最大电压指什么？提示：max, sampling modules英文： 2. act on对起作用The auto prefix refers to the single coil acting on itself. “自耦”这个前缀描述的是自己（已完成变压）工作的的单线圈。练习：你为什么没有按照她的建议去做呢？英文： 15What does the max voltage of the electrical sampling modules refer to？ Why do you not act on her advice?Look and Study Dialogue Reading Further Study75W