電子課件《電工英語(yǔ)(第三版)》A013750電工英語(yǔ)電子課件unit5

1、ELECTRICAL ENGLISH英語(yǔ)電工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真空吸塵器ventilation fan通風(fēng)風(fēng)扇gear齒輪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繞線轉(zhuǎn)子induction motor異步電機(jī)disk drive磁盤(pán)驅(qū)動(dòng)器Look and Study Dialogue Reading Further Study75Words and PhrasesPeter（B）購(gòu)買了一臺(tái)新洗衣機(jī)，Jane（A）見(jiàn)到后，提出了幾個(gè)問(wèn)題。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電機(jī)的作用與類型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電機(jī)的作用與類型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功率因數(shù)power factor啟動(dòng)電流squirrel cage motor上百種裝置start

14、ing current.鼠籠式電動(dòng)機(jī)Wound rotor繞線轉(zhuǎn)子Look and Study Dialogue Reading Further Study75Words and PhrasesC. Learn the important grammar and phrase in the text.1. suit to適合于The type of motor best suited to operate a particular piece of equipment can be different for different types of machines. 機(jī)器類型不同，最適合驅(qū)動(dòng)某

15、個(gè)特定部件的電動(dòng)機(jī)類型也不同。練習(xí)：這種永磁同步電動(dòng)機(jī)被設(shè)計(jì)成適用于車床。提示：permanent magnet, lathe英文：2. in that因?yàn)镾ynchronous motors have an advantage in that they can provide power factor correction for themselves or other inductive loads connected to the same power line. 同步電機(jī)的優(yōu)點(diǎn)在于，它們可以調(diào)整自身或其它與之連接的同一電力線路上電感負(fù)載的功率因數(shù)。練習(xí)：她很幸運(yùn)，因?yàn)橛信笥褌儙退?。提?/p>

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 / 電源；2. commutator / 換向；3. arm

17、ature / 電樞、轉(zhuǎn)子；4. field windings / 勵(lì)磁繞組；5. drive shaft / 驅(qū)動(dòng)軸；6. brush / 電刷；7. bearing / 軸承；8. motor frame / 電動(dòng)機(jī)架；Look and Study Dialogue Reading Further Study75Words and PhrasesB. Sinotech Motors.Sinotech Motors can ensure（確保)）excellent Induction Motors from China and is very price competitive（競(jìng)爭(zhēng)的）.

18、Sinotech Motors has manufactured QS-9000 and ISO certified Induction Motors in China for over 15 years. Sinotech Motors is dedicated to（從事于）delivering induction motors from China to you at lower prices but the same quality, service and terms（條款）as a domestic（國(guó)內(nèi)）supplier（供應(yīng)商）.Sinotech Induction Motor

19、s are engineered（設(shè)計(jì)）in the U.S. and manufactured in China.13Shaded Pole（罩極）MotorsLook and Study Dialogue Reading Further Study75Words and Phrases13machine mi:n n. 機(jī)械，機(jī)器electricity ,ilektristi n. 電liter li:t n. 公升per p prep. 每一cycle saikl n. 循環(huán)，周期performance pf:mns n. 性能spin spin n. 旋轉(zhuǎn)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，手冊(cè)parameter prmit n. 參數(shù)，系數(shù)specification ,spesifikein n. 規(guī)格，說(shuō)明書(shū)power pau vt. 供以動(dòng)力disk disk n. 磁盤(pán)mixer miks n. 攪拌器vacuum vkjum adj. 真空的cleaner kli:n n. 洗潔器ventilation ,ventilein n 通風(fēng)fan fn n. 風(fēng)扇broadly br:dli adv. 概括地category ktiri

21、n. 種類suit sju:t vi. 合適particular ptikjul adj.獨(dú)有的employ impli vt. 使用，采用gear i n. 齒輪generally denrli adv. 通常地，普遍地reduced ridju:st adj. 減少的Look and Study Dialogue Reading Further Study75Words and Phrases13gradually grdjuli adv. 逐步地wind wind vt. 纏繞rotor rut n. 轉(zhuǎn)子induction indkn n. 電磁感應(yīng)squirrel skw:rl n.

22、 松鼠control kntrul vt. 控制；n. 控制variable vribl adj. 可變的frequency frikwnsi n. 頻率drive draiv n. 驅(qū)動(dòng)choice tis n. 選擇torque t:k n. 轉(zhuǎn)矩，扭矩relatively reltivli adv.相對(duì)地synchronous sikrns adj. 同步的factor fkt n. 因素，因數(shù)correction krekn n. 改正，修正kWh abbr. 千瓦小時(shí)（kilowatt hour）be related to與有關(guān)hundreds of許許多多，成百的vacuum cl

23、eaner吸塵器and so on 等等suit to適合于wound rotor繞線轉(zhuǎn)子induction motor異步電機(jī)squirrel cage motor鼠籠式電動(dòng)機(jī)synchronous motor同步電機(jī)power factor功率因數(shù)inductive load電感負(fù)載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發(fā)電廠control panel控制面

25、板concrete base混凝土基礎(chǔ)Look and Study Dialogue Reading Further Study75Words and Phrases在新建的發(fā)電廠，兩個(gè)電氣工作人員正在談?wù)撍麄兘裉煲龅墓ぷ?。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在新建的發(fā)電廠，兩個(gè)電氣工作人員正在談?wù)撍麄兘裉煲龅墓ぷ鳌: 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電機(jī)安裝與維護(hù)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電機(jī)安裝與維護(hù)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緊固螺栓a piece of machinery正確定位fixing bolt破壞外包裝crack the casing一件機(jī)器individual record各自的記錄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. 一旦電機(jī)（安裝）就位，就要加以固定和調(diào)正，這個(gè)過(guò)程與其連接軸的類型和機(jī)器的尺寸緊密相關(guān)。練習(xí)：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. 這些記錄不僅對(duì)承擔(dān)維護(hù)工作的電工很重要，而且對(duì)管理人員也很重要。練習(xí)：不但我喜歡這部電影，我媽媽也很喜歡。英文：14一旦錢(qián)花光了，我們就不知道該怎么辦了。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（發(fā)電機(jī)）, a rotating machine that converts mechanical（機(jī)械的）energy into electrical energy by creating relative motion（運(yùn)動(dòng)） between a magnetic field（磁場(chǎng)）and a conductor. The energy source harnessed（點(diǎn)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（技術(shù)）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(承擔(dān))by authorized（授權(quán)的） personnel（人員）. 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. 調(diào)節(jié)interlock ,intlk v. 互鎖，連鎖interactively ,intrktivli adv. 交互地operator preit n. 操作員feedback

41、fi:dbk n. 反饋fault f:lt n. 故障operational ,preinl adj. 操作的regulation ,rejulein n.條例handle hndl vt. 處理，操作，搬運(yùn)position pzin vt. 放置align lain vt. 排列machinery mi:nri n. 機(jī)械transport trnsp:t n. 運(yùn)輸crack krk vt. 使破裂casing keisi n. 包裝procedure prsi:d n. 程序，步驟link lik vt. 連接base beis n. 基礎(chǔ)bolt bult n. 螺栓notation

42、 nutein n. 記號(hào)power plant 電廠on-site adj. 現(xiàn)場(chǎng)的test on對(duì)進(jìn)行測(cè)試Main Control Panel主控制板on the spot在現(xiàn)場(chǎng)control room控制室in position就位fix to固定于fixing bolt緊固螺栓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發(fā)電廠step-up substation升壓變電站transmission line輸電線stepped-down substation降壓變電站distribution power

45、 line配電線路consumer用戶Look and Study Dialogue Reading Further Study75Words and PhrasesJane（B）在某變電站工作，Peter（A）是她的朋友。Peter對(duì)變電站很感興趣，于是向Jane請(qǐng)教了一些問(wèn)題。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）在某變電站工作，

47、Peter（A）是她的朋友。Peter對(duì)變電站很感興趣，于是向Jane請(qǐng)教了一些問(wèn)題。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變壓器種類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變壓器種類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輸出電能outputs energy電擊dual-winding雙繞組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，與相關(guān)The auto prefix refers to the single coil acting on itself. “自耦”這個(gè)前綴描述的是自己（已完成變壓）工作的的單線圈。練習(xí)：電氣采樣模塊的最大電壓指什么？提示：max, sampling modules英文： 2. act on對(duì)起作用The auto prefix refers to the single coil acting on itself. “自耦”這個(gè)前綴描述的是自己（已完成變壓）工作的的單線圈。練習(xí)：你為什么沒(méi)有按照她的建議去做呢？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