电气工程专业英语 (1)
电气工程与自动化专业英语第一章课文翻译
第一章第一篇sectiongTwo variables u(t) and i(t) are the most basic concepts in an electric circuit, they characterize the various relationships in an electric circuitu(t)和i(t)这两个变量是电路中最基本的两个变量，它们刻划了电路的各种关系。
Charge and CurrentThe concept of electric charge is the underlying principle for explaining all electrical phenomena. Also, the most basic quantity in an electric circuit is the electric charge. Charge is an electrical property of the atomic particles of which matter consists, measured in coulombs (C). 电荷和电流电荷的概念是用来解释所有电气现象的基本概念。
也即，电路中最基本的量是电荷。
电荷是构成物质的原子微粒的电气属性，它是以库仑为单位来度量的。
We know from elementary physics that all matter is made of fundamental building blocks known as atoms and that each atom consists of electrons, protons, and neutrons. We also know that the charge e on an electron is negative and equal in magnitude to 1.60210×10 19C, while a proton carries a positive charge of the same magnitude as the electron. The presence of equal numbers of protons and electrons leaves an atom neutrally charged. 我们从基础物理得知一切物质是由被称为原子的基本构造部分组成的，并且每个原子是由电子，质子和中子组成的。
电气工程及其自动化专业英语答案
第一章⚫Section1习题答案一.Choose the best answer into the blank1.B2.D3.C4.A5.B二.Answer the following questions according to the text1.No. The current need not be a constant-valued function because charge can vary with2.Time.2.The current increases when the time rate of charges is greater.3.The uab=-1V can be interpreted in two ways:①point b is 1 V higher than point a;②the Potential at point a with respect to point b is -1V.4.w=∫pdt5.Because by the passive sign convention,current enters through the positive polarity ofThe voltage,p=ui>0 implies that the element is absorbing power and p=ui<0 impliesThat the element is releasing or supplying power.⚫Section2习题答案一.Choose the best answer into the blank1.B2.A3.B4.C5.B二.Answer the following questions according to the text1.The difference between an independent source and a dependent source is: the source2.Quantity of a dependent source is controlled by another voltage or current,but the source Quantity of an independent source maintains a specified value.3.An ideal independent source is an active element that provides a specified voltage or4.Current that is completely independent of other circuit variables.3.No.The current through an independent voltage source can be calculated by the4.External circuit.4.A voltage-controlled voltage source(VCVS),A current-controlled voltage source (CCVS),A voltage-controlled current source (VCCS), A current-controlled current source (CCCS)5.No,it isn’t.三.Translate the following into Chinese（译文）在随后内容中提及的所有简单电路元件，根据通过它的电流和其两端电压之间的关系进行分类。
大学试卷-电气工程及其自动化大学英语1
河北大学继续教育学院试卷卷别 A 考核方式闭卷年级、专业课程大学英语1（本）姓名学号Part I Use of English （20 points）D irections: In thispart there are 20 incomplete dialogs. For each dialog there are four cho ices marked ABC and D. Choose the O NE answer that best completes the dialogue. 1. —Thank you very much for helping me.—_____________________2.A. That's right.B. Yes，it's right.C. Don't mention it.D. I'd like to.2.—Hello，may I speak to John?—_____________________A. Yes，you may.B. Please don't go away.C. Hold on，please.D. No，I'm John.3 . C a n I speak to Mr. Li?—_____________________A. No，you can't.B. Sorry，but he isn't in at the moment.C. No. I can't find him at the moment.D. Who are you?4. —Many thanks for coming to see me off.—_____________________A. Don't thank me.B. You are so kind.C. Never mind.D. It's a pleasure.5. —Thanks for your present. It's really nice.A－9-1—_____________________A. Yes，I think so.B. Never mind.C. I'd love to.D. I'm glad you like it.6. —Let's go for a flower show. What do you say? —_________A. No，I wouldn't.B. I didn't say anything.C. Yes，I would.D. All right. Let's go.7. —Do you want to have ice cream or just water? —_________A. Come on.B. As you like.C. Yes，both.D. Neither，thank you.8. —Which do you prefer，meat or fish?—_________A.As you like.B. All right.C. Either will do.D. Nothing.9. —Will you be able to come to the party?—_________A. I believe，yes.B. I am afraid not.C… I don't hope so.D. I don't expect.10. —-Would you lend me your pen?—_________A. Yes，give you.A－9-2B. OK， use it.C. Sure，here you are.D. It doesn't matter.Part Ⅱ Reading Comprehension （30 points）Directions: There are four passages in this part. Each passage is followed by five questions. For each question there are four choices marked A， B，C and D. Chose the best answer to each question.Passage OneEverybody knows that the favorite food in the United States is the hamburger. It seems impossible，but people eat 34，000，000，000 hamburgers a year. This is enough to make a line of hamburgers around the world four times.The favorite place to buy a hamburger is a fast-food restaurant. In these restaurants，people order their food，wait just a few minutes and carry it to their tables themselves. They can eat it in the restaurant or take the food out and eat it at home，at work，or in a park. At some restaurants people can drive up beside a window. They order the food，and a worker hands it to them through the window. Then they eat in their car.Hamburgers are not the only kind of food that fast-food restaurants serve. Some serve fish，chicken，beef，sandwiches，or Mexican food. They also serve fries （French fried potatoes），shakes （a drink made from milk and ice cream），soft drinks，and coffee. Fast-food restaurants are very popular because the service is fast and the food is inexpensive.For many people，this is more important than the quality of the food. These restaurants are also popular because the food is always the same. People know that if they eat at a company's restaurant in the north or south of the city，the food will be the same，if they eat in New York or San Francisco，it will still be the same.11. According to the passage，what food do Americans like best?A. Beef.B. Sandwiches.C. Hamburger.D. Fries.12. Where can Americans eat a hamburger?A. At home.B. In a park.A－9-3C. In their car.D. At any of the places mentioned above.13.Fast food is .A.deliciousB. unpopularC. inexpensiveD. of high quality14. The last paragraph tells us________.A. fast-food is very popularB. people like to eat in fast-food restaurantsC. why fast-food restaurants are very popularD. you can eat fast-food any where in the US15. What is the main idea of the passage?A. Fast-food restaurants are very popular.B. People in the US eat enough hamburgers to make a line around the world.C. Some people eat fast food in parks.D. People can eat fast food at work or in a park.Passage TwoGoing to court can be frightening，especially if you are a child. You may have to stand up in the witness box，and swear to tell the truth and answer questions in front of a crowd of adults. It would be even more frightening if you were the victim of a crime and you had to sit in the same courtroom as the person accused of attacking you，for instance. So the law in Britain has made it easier for children to act as witnesses. Children are allowed to tell what they know，from another room in the same courthouse，in this way they do not have to face all those people in the courtroom.It works on a closed-circuit （闭路的）television link，which means that the TV only operates inside the court. The child witness sits in a room with a social worker in front of a TV camera. Everyone in the court room can see the child on a TV screen，but the child can only see the judge and the lawyers who will ask him or her questions. The system has been so successful that it will be extended to more courts this year.Another way to make it easy for a child to act a witness is to set up a screen in the court room around the witness box so that the child cannot see the defendant （被告）. Information given by children can be very important to a court trial，butbefore1988 theA－9-4law did not really recognize that children told the truth. It stated that anything a child said in court had to be supported by other evidence in the case.16. A child witness，if he were the victim of the crime，would be frightened most by________. A. all the questions he had to answerB. the crowd of adults he had to faceC. the judge and the lawyersD. the person accused of attacking him17. The most important point of the new system that made things easier for a child witne ss is that____.A. he does not see the defendantB. he speaks in front of a TV cameraC. he is in another room in the same courthouseD. everyone in the courtroom can see the child18.What does the author think of the new system according to the third paragraph?A. Not very good.B. Very successful.C. Just an experiment.D. Hardly acceptable.19, Has the law always recognized the importance of children's information in court?A. No.B. Yes.C. Not until 1988.D. Before 1988，yes.20. The word “case” in the last paragraph means________.A. a particular situationB. a particular incidentC. a trialD. a boxPassage ThreeAlbeit Einstein had a great effect on science and history，greater than only a few other men have achieved. An American university president once commented that Einstein had created a new outlook，a new view of the universe. It may be some time before the average mind understands fully the identity of time and space and so on —butA－9-5even ordinary man understands now that the universe is something larger than ever thought before.By 1914 the young Einstein had gained world fame. He accepted the offer to become a professor at the Prussian Academy of Science in Berlin. He had few duties，little teaching and unlimited opportunities for study，but soon his peace and quiet were broken by the First World War.Einstein hated violence. The misery of war affected him deeply，and he sat unhappily in his office doing little. He lost interest in his research. Only when peace came in 1918 was he able to get back to work.In the years following World War I honors were increasingly given to him. He became the head of the Kaiser Whihem Institute on Theoretical Physics. In 1921 he won the Nobel Prize，and he was honored in Germany until the rise of Nazism when he was driven from Germany because he was a Jew.21. According to the American university president，________.A. everyone understands Einstein's theory todayB. Einstein achieved more than any other scientists in historyC. the theory of relativity can be quickly learned by everyoneD. our ideas about the universe are different today because of Einstein22. According to paragraph two，Albert Einstein________.A. was a famous chemistB. became a professional researcherC. was popularA.D. enjoyed reading about war23. What did Albert Einstein do in the First World War?A. He joined the army.B. He participated in anti-war activities.C. He was unhappy and did little.D. He went to America.24.After World War I，Albert Einstein________.A. was forced to leave the Kaiser Whihem Institute on Theoretical PhysicsB. was acknowledged by scientific community because of his devotionC. was forced to work for the NazisD. was appointed the head of the Kaiser Whihem Institute on Theoretical Physics by the Nazis25. It may be concluded that________.A. Albert Einstein had no other interests than scienceB. Einstein was forced to serve in the German armyA－9-6C. Germans usually have a high respect for scienceD. his reputation was ruined because of his work during World War IPart Ⅲ Vocabulary and Structure （20 points）Directions: In this section there are 30 incomplete sentences. For each sentence ther e are four choices marked A，B，C and D. Choose the O N E answer that best completes the sentence.26.—Hi，Mary，you look very tired.—Yeah， I________for a whole week.A. workedB. had workedC. have workedD. have been working27. He gave me________on how to study English well.A. some adviceB. advicesC. an adviceD. the advice28. Hans is________of the three boys.A. the cleverB. the clevererC. cleverestD. the cleverest29.Look________！There's a car coming.A. upB. outC. backD. over30. Mother promised she________me an English-Chinese dictionary as a gift for my birt hday.A. was buyingB. would buyC. boughtD. will buy31. The police are______the two missing children.A－9-7A. looking outB. looking afterC. looking forD. looking back on32. I don't know why she avoids____________ her opinion on the subject.A. to giveB. to be givenC. givingD. being given33.I do not intend______that，because we shall have an opportunity to do so on another occasion.A. followingB. followedC. being followedD. to follow34. The difference between an African elephant and an Asian one is that the former has_ _____ears.A. largerB. the largeC. more largerD. the largest35. He's determined to finish the job______long it takes.A. howeverB. no matterC. whateverD. whereverPartⅣTranslate the following sentences into English，using the words and phrases given in the brackets.（20 points）36..我们公司主要从事电脑软件和网络的开发。
电气工程专业英语
电气工程专业英语词汇表 1generator 发电机gas insulated substation GIS 气体绝缘变电站turbogenerator 汽轮发电机neutral point 中性点hydrogenerator 水轮发电机moving contact 动触头hydraulic turbine 水轮机fixed contact 静触头steam turbine 汽轮机arc-extinguishing chamber 灭弧室dynamo 直流发电机stray capacitance 杂散电容motor 电动机stray inductance 杂散电感stator 定子sphere gap 球隙rotor 转子bushing tap grounding wire 套管末屏接地线power transformer 电力变压器electrostatic voltmeter 静电电压表variable transformer 调压变压器ammeter 电流表taped transformer 多级变压器grounding capacitance 对地电容step up (down) transformer 升(降)压变压器voltage divider 分压器circuit breaker CB 断路器surge impedance 波阻抗dead tank oil circuit breaker 多油断路器Schering bridge 西林电桥live tank oil circuit breaker 少油断路器Rogowski coil 罗可夫斯基线圈vacuum circuit breaker 真空断路器oscilloscope 示波器sulphur hexafluoride breaker SF6 断路器peak voltmeter 峰值电压表potential transformer PT 电压互感器conductor 导线current transformer CT 电流互感器cascade transformer 串级变压器disconnector 隔离开关coupling capacitor 耦合电容earthing switch 接地开关test object 被试品synchronous generator 同步发电机detection impedance 检测阻抗asynchronous machine 异步电机substation 变电站Insulator 绝缘子hydro power station 水力发电站lightning arrester 避雷器thermal power station 火力发电站metal oxide arrester MOA 氧化锌避雷器nuclear power station 核电站bus bar 母线oil-filled power cable 充油电力电缆overhead line 架空线mixed divider (阻容)混合分压器transmission line 传输线XLPE cable 交链聚乙烯电缆(coaxial) cable (同轴)电缆relay 继电器iron core 铁芯tuned circuit 调谐电路winding 绕组suspension insulator 悬式绝缘子bushing 套管porcelain insulator 陶瓷绝缘子front(tail) resistance 波头(尾)电阻glass insulator 玻璃绝缘子inverter station 换流站flash counter 雷电计数器steel-reinforced aluminumconductor钢芯铝绞线charging(damping) resistor 充电(阻尼)电阻tank 箱体point plane gap 针板间隙earth(ground) wire 接地线exciting winding 激磁绕组grading ring 均压环trigger electrode 触发电极highvoltage engineering 高电压工程glow discharge 辉光放电highvoltage testing technology 高电压试验技术harmonic 谐波Power electronics 电力电子Automatic control 自动控制Principles of electric circuits 电路原理Digital signal processing 数字信号处理电气工程专业英语词汇表 2power system 电力系统impulse current 冲击电流power network 电力网络impulse flashover 冲击闪络insulation 绝缘inhomogenous field 不均匀场overvoltage 过电压insulation coordination 绝缘配合aging 老化internal discharge 内部放电alternating current 交流电lightning stroke 雷电波AC transmission system 交流输电系统lightning overvoltage 雷电过电压arc discharge 电弧放电loss angle （介质）损耗角attachment coefficient 附着系数magnetic field 磁场attenuation factor 衰减系数mean free path 平均自由行程anode (cathode) 阳极（阴极）mean molecular velocity 平均分子速度breakdown （电）击穿negative ions 负离子bubble breakdown 气泡击穿non-destructive testing 非破坏性试验cathode ray oscilloscope 阴极射线示波器non-uniform field 不均匀场cavity 空穴,腔partial discharge 局部放电corona 电晕peak reverse voltage 反向峰值电压composite insulation 组合绝缘photoelectric emission 光电发射critical breakdown voltage 临界击穿电压photon 光子Discharge 放电phase-to-phase voltage 线电压Dielectric 电介质,绝缘体polarity effect 极性效应dielectric constant 介质常数power capacitor 电力电容dielectric loss 介质损耗quasi-uniform field 稍不均匀场direct current 直流电radio interference 无线干扰divider ratio 分压器分压比rating of equipment 设备额定值grounding 接地routing testing 常规试验electric field 电场residual capacitance 残余电容electrochemical deterioration 电化学腐蚀shielding 屏蔽electron avalanche 电子崩short circuit testing 短路试验electronegative gas 电负性气体space charge 空间电荷epoxy resin 环氧树脂streamer breakdown 流注击穿expulsion gap 灭弧间隙surface breakdown 表面击穿field strength 场强sustained discharge 自持放电field stress 电场力switching overvoltage 操作过电压field distortion 场畸变thermal breakdown 热击穿field gradient 场梯度treeing 树枝放电field emission 场致发射uniform field 均匀场flashover 闪络wave front(tail) 波头（尾）gaseous insulation 气体绝缘withstand voltage 耐受电压Prime mover 原动机Power factor 功率因数Torque 力矩Distribution automation system 配电网自动化系统Servomechanism 伺服系统Automatic meter reading 自动抄表Boiler 锅炉Armature 电枢Internal combustion engine 内燃机Brush 电刷Deenergize 断电Commutator 换向器Underground cable 地下电缆Counter emf 反电势Loop system 环网系统Demagnetization 退磁，去磁Distribution system 配电系统Relay panel 继电器屏Trip circuit 跳闸电路Tertiary winding 第三绕组Switchboard 配电盘，开关屏Eddy current 涡流Instrument transducer 测量互感器Copper loss 铜损Oil-impregnated paper 油浸纸绝缘Iron loss 铁损Bare conductor 裸导线Leakage flux 漏磁通Reclosing 重合闸Autotransformer 自耦变压器Distribution dispatch center 配电调度中心Zero sequence current 零序电流Pulverizer 磨煤机Series (shunt) compensation 串（并）联补偿Drum 汽包，炉筒Restriking 电弧重燃Superheater 过热器Automatic oscillograph 自动录波仪Peak-load 峰荷Tidal current 潮流Prime grid substation 主网变电站Trip coil 跳闸线圈Reactive power` 无功功率Synchronous condenser 同步调相机Active power 有功功率Main and transfer busbar 单母线带旁路Shunt reactor 并联电抗器Feeder 馈电线Blackout 断电、停电Skin effect 集肤效应Extra-high voltage (EHV) 超高压Potential stress 电位应力(电场强度)Ultra-high voltage (UHV) 特高压Capacitor bank 电容器组Domestic load 民用电crusher 碎煤机Reserve capacity 备用容量pulverizer 磨煤机Fossil-fired power plant 火电厂baghouse 集尘室Combustion turbine 燃气轮机Stationary (moving) blade 固定（可动）叶片Right-of-way 线路走廊Shaft 转轴Rectifier 整流器Kinetic(potential) energy 动（势）能Inductive (Capacitive) 电感的(电容的) Pumped storage power station 抽水蓄能电站Reactance (impedance) 电抗（阻抗）Synchronous condenser 同步调相机Reactor 电抗器Light(boiling)-water reactor 轻（沸）水反应堆Reactive 电抗的，无功的Stator(rotor) 定（转）子Phase displacement (shift) 相移Armature 电枢Surge 冲击，过电压Salient-pole 凸极Retaining ring 护环Slip ring 滑环Carbon brush 炭刷Arc suppression coil 消弧线圈Short-circuit ratio 短路比Primary(backup) relaying 主(后备)继电保护Induction 感应Phase shifter 移相器Autotransformer 自藕变压器Power line carrier (PLC) 电力线载波（器）Bushing 套管Line trap 线路限波器Turn (turn ratio) 匝（匝比，变比）Uninterruptible power supply 不间断电源Power factor 功率因数Spot power price 实时电价Tap 分接头Time-of-use(tariff) 分时（电价）Recovery voltage 恢复电压XLPE(Cross Linked Polyethylene )交联聚乙烯（电缆）Arc reignition 电弧重燃Rms (root mean square) 均方根值Operation mechanism 操动机构RF (radio frequency) 射频Pneumatic(hydraulic) 气动（液压）Rpm (revolution per minute) 转/分Nameplate 铭牌LAN (local area network) 局域网Independent pole operation 分相操作LED (light emitting diode) 发光二极管Malfunction 失灵Single (dual, ring) bus 单（双，环形）母线Shield wire 避雷线IC (integrated circuit) 集成电路Creep distance 爬电距离FFT (fast Fourier transform) 快速傅立叶变换Silicon rubber 硅橡胶Telemeter 遥测Composite insulator 合成绝缘子Load shedding 甩负荷Converter (inverter) 换流器（逆变器）Lateral 支线Bus tie breaker 母联断路器Power-flow current 工频续流Protective relaying 继电保护sparkover 放电Transfer switching 倒闸操作Silicon carbide 碳化硅Outgoing (incoming) line 出（进）线Zinc oxide 氧化锌Phase Lead(lag) 相位超前（滞后）Withstand test 耐压试验Static var compensation (SVC) 静止无功补偿Dispatcher 调度员Flexible AC transmission system (FACTS) 灵活交流输电系统Supervisory control and data acquisition (SCADA) 监控与数据采集EMC (electromagnetic compatibility) 电磁兼容ISO (international standardization organization) 国际标准化组织GIS (gas insulated substation, geographic information system) 气体绝缘变电站地理信息系统三绕组变压器：three-column transformer ThrClnTrans双绕组变压器：double-column transformer DblClmnTrans电容器：Capacitor并联电容器：shunt capacitor电抗器：Reactor母线：Busbar输电线：TransmissionLine发电厂：power plant断路器：Breaker刀闸(隔离开关)：Isolator分接头：tap电动机：motor（2）状态参数有功：active power无功：reactive power电流：current容量：capacity电压：voltage档位：tap position有功损耗：reactive loss无功损耗：active loss功率因数：power-factor功率：power功角：power-angle电压等级：voltage grade空载损耗：no-load loss铁损：iron loss铜损：copper loss空载电流：no-load current阻抗：impedance正序阻抗：positive sequence impedance 负序阻抗：negative sequence impedance 零序阻抗：zero sequence impedance电阻：resistor电抗：reactance电导：conductance电纳：susceptance无功负载：reactive load 或者QLoad有功负载: active load PLoad遥测：YC(telemetering)遥信：YX励磁电流(转子电流)：magnetizing current 定子：stator功角：power-angle上限:upper limit下限：lower limit并列的：apposable高压: high voltage低压：low voltage中压：middle voltage电力系统power system发电机generator励磁excitation励磁器excitor电压voltage电流current母线bus变压器transformer升压变压器step-up transformer高压侧high side输电系统power transmission system输电线transmission line固定串联电容补偿fixed series capacitor compensation 稳定stability电压稳定voltage stability功角稳定angle stability暂态稳定transient stability电厂power plant能量输送power transfer交流AC装机容量installed capacity电网power system落点drop point开关站switch station双回同杆并架double-circuit lines on the same tower 变电站transformer substation补偿度degree of compensation高抗high voltage shunt reactor无功补偿reactive power compensation故障fault调节regulation裕度magin三相故障three phase fault故障切除时间fault clearing time极限切除时间critical clearing time切机generator triping高顶值high limited value强行励磁reinforced excitation线路补偿器LDC(line drop compensation)机端generator terminal静态static (state)动态dynamic (state)单机无穷大系统one machine - infinity bus system机端电压控制A VR电抗reactance电阻resistance功角power angle有功（功率）active power无功（功率）reactive power功率因数power factor无功电流reactive current下降特性droop characteristics斜率slope额定rating变比ratio参考值reference value电压互感器PT分接头tap下降率droop rate仿真分析simulation analysis传递函数transfer function框图block diagram受端receive-side裕度margin同步synchronization失去同步loss of synchronization 阻尼damping摇摆swing保护断路器circuit breaker电阻：resistance电抗：reactance阻抗：impedance电导：conductance电纳：susceptance导纳：admittance电感：inductance电容: capacitance。
电气工程专业英语section 1-1
Section1 Current and Voltage
flow as the movement of positive charges, that is, opposite to the flow of negative charges, as Fig.l-1 illustrates. This convention was introduced by Benjamin Franklin (l706～l790), the American scientist and inventor. Although we now know that current in metallic conductors is due to negatively charged electrons, we will follow the universally accepted convention that current is the net flow of positive charges. Thus, Electric current is the time rate of charge, measured in amperes (A). Mathematically, the relationship among current i, charge q, and time t is
p ui
(1-6)
Because u and i are generally function of time, the power p in Eq. (1-6) is a time-varying quantity and is called the instantaneous power. The power absorbed or supplied by an element is the product of the voltage across the element and the current through it. If the power has a plus sign, power is being delivered to or absorbed by the element. If,
电气工程及其自动化专业英语课文翻译
unit1 taxe A 电力变压器的结构和原理在许多能量转换系统中，变压器是一个不了缺少的原件。
它使得在经济的发电机所产生电能并以最经历的传输电压传输电能，同时对于特定的使用者合适的电压使用电能成为可能。
变压器同样广泛的应用于低功率低电流的电子电路和控制电路中，来执行像匹配电源组抗和负载以求得最大的传输效率。
隔离一个电路与另一个电路在两个电路之间隔离直流电而保证交流电继续通道的功能。
在本质上，变压器是一个由两个或多个绕组通过相互的磁通耦合而组成的，如果这其中的一个绕组，原边连接到交流电压源将产生交流磁通它的幅值决定于原边的电压所提供的电压频率及匝数。
感应磁通将与其他绕组交链，在副边中将感应出一个电压其幅值将取决于副边的匝数及感应磁通量和频率。
通过使原副边匝数比例适应，任何所期望的电压比例或转换比例都可以得到。
变压器工作的本质仅要求存在与两个绕组相交链的时变的感应磁通。
这样的作用也可以发生在通过空气耦合的两组绕组中，但用铁心或其他铁磁材料可以使绕组之间的耦合作用增强，因为一大部分磁通被限制在与两个绕组交链的高磁导率的路径中。
这种变压器通常被称作为心式变压器。
大部分变压器都是这种类型。
以下的讨论几乎全部围绕心事变压器。
为减少铁心中的涡流所产生的损耗，磁路通常由一叠薄的叠片所组成。
如图1.1所示两种常见的结构形式用示意图表示出来。
芯式变压器的绕组绕在两个矩形铁心柱上，壳式变压器的绕组绕在三个铁心柱中间的那个铁心柱上，。
0.14毫米厚的硅钢片通常被用于在低频率低于几百Hz下运行的变压器中，硅钢片具有价格低铁心损耗小，在高磁通密度下，磁导率高的理想性能，能用做高频率低能耗的标准的通讯电路中的小型变压器的铁心是由被称为铁氧体的粉末压缩制成的铁磁合金所构成的。
在这些结构中，大部分的磁通被限制在固定的铁心中与两个绕组相交链。
绕组也产生多余的磁通，像漏磁通，只经过一个绕组和另外的绕组不相交链。
虽然漏磁通只是所有磁通的一小部分，但它在决定变压器的运行情况中起着重要的作用。
电气工程专业英语+unt1参考文档
Unit 1 Fundamentals of Electronic Circuits
1.1 Introduction to Circuit Theory 1.2 Analog and Digital Circuits 1.3 Three-Phase Circuits 1.4 Further Reading
Notice that the three points that form node b ① are connected by perfectly conducting wires and therefore constitute a single point.
Note:① "three points that form node b "表示"形成节点
b的3个点".此句可译为:注意到形成节点b的3个点是通过理
elements or devices, whereas a circuit is a network
providing one or more closed paths③.
Note：②：regard … as表示“把…认为” NNoottee：：③①：：pdrioffveirtfherse为ntiate nbeettwwoerekn的A后an置d 定B表语示。区分A和B；To differentiate between a circuit and a network是目的状语从句.
series
n. 连续；系列；级数；串联
parallel
adj. 平行的；并联的 n. 平行线；平
行面；v. 相应；平行
impedance
n. [电]阻抗；全电阻；[物]阻抗
theorem
n. [数]定理；法则
电气工程及其自动化专业英语
time-invariant 时不变的
self-(or mutual-)induction 自（互）感
displacement current 位移电流 conductance 电导
voltage drop 电压降 volt-ampere characteristics 伏安特性
metal-filament lamp 金属丝灯泡
seen, increase of current from zero to
I≈I1 causes the terminal voltage of the source to decrease linearly
V12=V=E－VS=E－RSI
Fig.1.3
In other words, the voltage drop VS across the source resistance rises in proportion to the current. This goes on until
电气工程专业常用英语
电力系统power system 发电机generator 励磁excitation励磁器excitor 电压voltage 电流current升压变压器step-up transformer 母线bus 变压器transformer空载损耗：no-load loss 铁损：iron loss 铜损：copper loss空载电流：no-load current 无功损耗：reactive loss 有功损耗：active loss输电系统power transmission system高压侧high side 输电线transmission line高压: high voltage 低压：low voltage 中压：middle voltage功角稳定angle stability 稳定stability 电压稳定voltage stability暂态稳定transient stability 电厂power plant 能量输送power transfer交流AC 直流DC 电网power system落点drop point 开关站switch station 调节regulation高抗high voltage shunt reactor 并列的：apposable 裕度margin故障fault 三相故障three phase fault 分接头：tap切机generator triping 高顶值high limited value 静态static (state)动态dynamic (state) 机端电压控制A VR 电抗reactance电阻resistance 功角power angle 有功（功率）active power电容器：Capacitor 电抗器：Reactor 断路器：Breaker电动机：motor 功率因数：power-factor 定子：stator阻抗电压：阻抗：impedance 功角：power-angle 电压等级：voltage grade有功负载: active load/PLoad 无功负载：reactive load 档位：tap position电阻：resistor 电抗：reactance 电导：conductance电纳：susceptance 上限:upper limit 下限：lower limit正序阻抗：positive sequence impedance 负序阻抗：negative sequence impedance零序阻抗：zero sequence impedance无功（功率）reactive power 功率因数power factor 无功电流reactive current斜率slope 额定rating 变比ratio参考值reference value 电压互感器PT 分接头tap仿真分析simulation analysis 下降率droop rate 传递函数transfer function框图block diagram 受端receive-side 同步synchronization保护断路器circuit breaker 摇摆swing 阻尼damping无刷直流电机：Brusless DC motor 刀闸(隔离开关)：Isolator 机端generator terminal 变电站transformer substation永磁同步电机：Permanent-magnet Synchronism Motor异步电机：Asynchronous Motor三绕组变压器：three-column transformer ThrClnTrans双绕组变压器：double-column transformer DblClmnTrans固定串联电容补偿fixed series capacitor compensation双回同杆并架double-circuit lines on the same tower单机无穷大系统one machine - infinity bus system励磁电流：magnetizing current 补偿度degree of compensationElectromagnetic fields 电磁场失去同步loss of synchronization装机容量installed capacity 无功补偿reactive power compensation故障切除时间fault clearing time 极限切除时间critical clearing time强行励磁reinforced excitation 并联电容器：shunt capacitor下降特性droop characteristics 线路补偿器LDC(line drop compensation) 电机学Electrical Machinery 自动控制理论Automatic Control Theory电磁场Electromagnetic Field微机原理Principle of Microcomputer电工学Electrotechnics Principle of circuits 电路原理Electrical Machinery 电机学变比ratio传感器sensor。
电气工程及其自动化专业英语(1)重点
Amplifier n.放大器Active a.有源的，有功的，有效地；活动的，主动的，积极的；活性的，放射的，激励的Active element有源元件Algebraic a.代数Ampere n.安，安培Amplitude n.振幅，幅度，波幅Atom n.原子Absorb v.吸收Approximate ad.近似，接近By the same token同理，同样；另外，还有Branch n.支路，支线，支脉；分支；部门，分部Battery n.电池(be) out of phas e异相的Capacitor n.电容器Chassis n.底盘，底架，底板，底座Current n.电流AC=alternating current交流电流DC=direct current 直流电流Charge n.电荷，v.充电，带电，起电Positive charge 正电荷Negative charge 负电荷Neutrally charge 电中性A unit charge 单位电荷Coulomb n.库仑Circuit n.电路Short circuit短路Open circuit开路Clockwise a.; ad. 顺时针方向的Counterclockwise a.; ad. 逆时针方向的Coefficient n.系数，因素，常数，率；折算率Conductance n.电导，导电性，导纳；传导Configuration n.结构，构造Convention n.习惯，惯例，常规Constant voltage source恒定电压源Controlled source受控源Dependent source受控源Diamond-shaped a.菱形的Dimension n.维数，度数；尺寸，线度；量纲，因次Determinant n.行列式；决定因素，遗传素Datum n.基准（点，线，面），基标；数据，资料，信息Domain n.区域，定义范围；区，界；支配，所有权，统治权Time domain时域Frequency domain频域Desired operating region规定的工作范围Electron n.电子Electromotive a.电动的，起电的Electromotive force电动势Error-minimizing a.]令错误最少的Effective a.有效的，等效的，生效的，能行的，有作用的，有影响的Equivalent a.等效的，等值的，等同的Ensure v.确保Generator n.发电机；（脉冲，信号，气体）发生器，振荡器，加速器Independent source独立源Ideal independent source理想独立源Incandescent a.白炽的，炽热的Incandescent lamp白炽灯Integrated circuit集成电路Instant n.瞬间，瞬时，即刻，时，时刻Instantaneous power瞬时功率Integrate v.积分，求积分Inductor n.电感器Impedance n.阻抗Joule n.焦尔Loop n.回路，闭合电路，环路，循环，环Linear a.线性的，一次的；直线的，线状的线性电阻Linear resistor线性电阻Nonlinear a.非线性的，非直线的Nonlinear resistor非线性电阻Neutral linear 中线Load n.负荷，负载Lag n.; v.滞后，落后，迟滞Lead v.超前，提前，领先Leave n.使，让Magnitude n.大小，幅值，幅度，量，数量，尺寸，值；等级，量级Mesh n.网孔Mesh analysis网孔分析Nodal a.结点的，节点的，结的，节的Nodal analysis 节点分析Network n.网络，电路，电网Node n.节点，结点，交点，叉点；节，结Operational a.运算的，计算的；操作的，工作的，业务的，运转的Ohm欧姆Ohm’s law欧姆定律Phase n.相；阶段，时期，局面；方面Phase voltage 相电压three-phase三相Phasor n.相量，相图，相位负矢量Phasor diagram 相量图Passive a.无源的；消极的，被动的；n.无源Passive element 无源元件Polarity n.极性Planar a.平面的，平的；二维的，二度的Power n.功率，效率；动力，电力，能力，电源；乘方，幂Potential difference n.电位差Property n.属性Proton n.质子Quotient n.商，系数；份额，应分得的部分Resistor n.电阻，电阻器Resistance n.电阻，电阻器；阻尼，阻力；抵抗，抵制，反对Reference direction参考方向Rectangular a.矩形的，直角的，正交的Rearrange v.重新整理，调整Siemens n.西门子Source n.电源Current-controlled voltagesource电流控制电压源Sequence n.顺序，次序，时序，序列，系列Positive sequence正序Phase sequence相序Negative sequence 负序Simultaneous a.联立方程的；同时（存在，发生）的，一起的，同步的Symmetry n.对称（性，现象）匀称，调和Sinusoidal a.正弦的Steady-state a.稳态的Superposition theorem叠加定理Stated n.规定值Theorem n.定理，原理，命题，法则Transistor n.晶体管，半导体管Time-varying a.时变的Token n.标记，象征，记号；特征，证明Topology n.拓扑，拓扑学，拓扑结构Topologically ad.在拓扑结构上，从拓扑结构Transform v.;n.变换，改变，转换，换算；变换式，反式Transmission n.输电，传Underlying n.基本的，根本的；潜在的，在下面的，下伏的Voltage n.电压Terminal voltage 端电压Linear voltage 线电压Variable n.变量Independent variable自变量Volt n.伏特Voltaic battery伏打电池Voltage-current characteristic伏安特性Work n.功Watt n.瓦特It should be noted that an ideal voltage source(dependent or independent) will produce any current required to ensure that the terminal voltage is as stated, whereas an ideal current source will produce the necessary voltage to ensure the stated current flow.应该注意：一个理想电压源（独立或受控）可向电路提供任意电流以保证其端电压为规定值，而电流源可向电路提供任意电压以保证其规定电流。
电气工程及其自动化专业英语第一单元课件
AC and DC electricity
AC (Alternating Current): The flow of electricity in which the direction of current changes periodically.
DC (Direct Current): The flow of electricity in which the direction of current remains constant.
02
Basic knowledge of electrical engineering
Basic concepts of circuits
Circuit
A closed path that allows current to flow.
Series and parallel circuits
Series circuits have current flow in the same direction, while parallel circuits have current flow in opposite directions.
Over time, Electrical Engineering and Automation has evolved to include a wide range of sub-fields, including power engineering, control systems, robotics, and more.
Computer control systems can be used for a wide range of applications, including industrial manufacturing, process control, aviation, and more.
(完整版)刘剑-电气工程及其自动化专业英语(建筑电气类)Unit1-passageA
TextElectric CircuitThe diagram of Fig 1.1 illustrates the essential parts of an electric circuit，which consists，in its simplest form, of an energy source and an interconnected energy dissipation or conversion device，known as theload.A practical energy source may take one many forms， depending, for example，on/electro —chemical，electro-magnetic,thermo—electric，photo-electric.，principles，but for the purpose of circuit analysis only two idealized forms are recognized， to one of which all practical sources approximate， They are： the voltage source and the current source.The voltage source maintains a constant terminal voltage irrespective of the current supplied to the load. It is important to appreciate that the voltage may be a function of, for example, time, temperature， pressure etc. It is constant without respect to variation of load。
电气工程及其自动化专业英语
电气工程及其自动化专业英语Section I basic electric circuitChapter 1 Introduction to electric circuitsNew Words and Expressions1. electrical circuit n. 电路2. voltage n. 电压，伏特3. curre nt n. 电流，通用的，流通的，现在的4. curre nt flow n. 电流5. resistor n. 电阻，电阻器6. battery n. 电池7. load n. 负载，负荷8. performa nee n. 性能9. circuit diagram n. 电路图10. idealized model n. 理想模型Introduction*A simple circuit and its components.idealized model of the circuit*Model can be cha nged if n ecessary.*summarizeIn elementary physics classes you undoubtedly have been introduced to the fun dame ntal con cepts of electricity and how real comp onen ts can be put together to form an electrical circuit. A very simple circuit, for example, might consist of a battery, some wire, a switch, and an incandescent light bulb as shown in Fig.1-1. The battery supplies the en ergy required to force electro ns around the loop, heati ng the filame nt of the bulb and caus ing the bulb to radiate a lot of heat and some light.Energy is transferred from a source, the battery, to a load, the bulb———You probably already know that the voltage of the battery and the electrical resista nee of the bulb have something to do with the amount of curre nt that will flowin the circuit. From your own practical experienee you also know that no current will flow until the switch is closed. That is, for a circuit to do anything, the loop has to be completed so that electro ns can flow from the battery to the bulb and the n back aga in to the battery. And fin ally, you probably realize that it doesn t much matter, whether there is on e foot or two feet of wire connecting the battery to the bulb, but that it probably would matter if there is a mile of wire between it and the bulb.Also shown in Fig. 1-1 is a model made up of idealized components. The batteryis modeled as an ideal source that puts out a constant voltage, VB, no matter what amount of curre nt, i, is draw n. The wires are con sidered to be perfect con ductors that offer no resista nee to curre nt flow. The switch is assumed to be ope n or closed. There is no arcing of curre nt across the gap whe n the switch is ope ned, nor is there any bounce to the switch as it makes con tact on closure. The light bulb is modeled as a simple resistor, R, that never changes its value, no matter how hot it becomes or how much curre nt is flow ing through it.Fig. 1-1 (a) A simple circuit(b) An idealized represe ntati on of thecircuitFor most purposes, the idealized model shown in Fig. 1-1b is an adequate represe ntati on of the circuit; that is, our prediction of the current that will flow through the bulb whenever the switch is closed will be sufficiently accurate that we can consider the problem solved. There may be times, however, when the model is in adequate. The battery voltage, for example, may drop as more and more curre nt is drawn, or as the battery ages. --------------------------------- T he light bulb' s resistance may change as it heats up, and the filame nt may have a bit of inductance and capacitance associated with it as well as resistance so that when the switch is closed, the current may not jump in sta ntan eously from zero to some fin al, steady state value. The wires may beundersized, and some of the power delivered by the battery may be lost in the wires before it reaches the load. These subtle effects may or may not be important, depending on what we are trying to find out and how accurately we must be able to predict the performa nee of the circuit. If we decide they are importa nt, we can always cha nge the model as n ecessary and then proceed with the an alysis. The point here is simple. The comb in ati ons of resistors, capacitors, in ductors, voltage sources, curre nt sources, and so forth, that you see in a circuit diagram are merely models of real comp onents that comprise a real circuit, and a certa in amount of judgme nt is required to decide how complicated the model must be before sufficie ntly accurate results can be obta in ed. For our purposes, we will be using very simple models in general, leav ing many of the complicati ons to more adva need textbooks.Chapter 2Definitions of key electrical quantitiesNew Words and Expressionscharge n. vt.电荷；充电nu cleus n.原子核(pl.); nuclear adj.n egative n.否定，负数，底片adj.否定的，消极的，负的，阴性的positive adj.［数］正的adj.［电］阳的in gen eral 通常,大体上，一般而言，总的说来algebraic adj.代数的，关于代数学的soluti on to the circuit problem n.关于电路问题的解法the un its of power n.功率的单位direct curre nt (dc) n 直流电alter nat ing curre nt(ac) n.交流电sinu soidally adv.正弦地tran sistor n.晶体管Part 1 Charge and CurrentAn atom con sists of a positively charged nu cleus surro un ded by a swarm of n egativelycharged electr ons. The charge associated with one electr on has bee n found to be 1.602 x 10- 19 coulombs; or, stated the other way around, one coulomb can be defined as the charge on 6.242 x 1018 electro ns. While most of the electr ons associated with an atom are tightly bound to the nu cleus, good con ductors, like copper, have free electrons that are sufficie ntly dista nt from their nu clei that their attract ion to any particular n ucleus is easily overcome. These con ducti on electr ons are free to wan der from atom to atom, and their moveme nt con stitutes an electric curre nt.In a wire, when one coulomb ' s worth of charge passes a given spot in one second, the current is defined to be one ampere (abbreviated A), named after the nineteenth-century physicist Andr ' e Marie Amp'ere. That is, curre nt i is the net rate of flow of charge q past a point, or through an area:i=d q/d t (1.1)In general, charges can be negative or positive. For example, in a neon light, positive ions move in one direct ion and n egative electr ons move in the other. Each con tributes to curre nt, and the total curre nt is their sum. By conven ti on, the direct ion of curre nt flow is take n to be the direct ion that positive charges would move, whether or not positive charges happen to be in the picture. Thus, in a wire, electrons moving to the right constitute a current that flows to the left, as shown in Fig.1-2.(〉)dq--- / =—dtFig. 1-2 By conven tio n, n egative charges movi ng in one direct ion con stitute a positive curre ntflow in the opposite direct ionW/hen charge flows at a steady rate in one direction only, the current is said to be direct current, or 血A battery, for example, supplies direct curre nt. When charge flows back and forth sinusoidally, it is said to be alternating current, or ac. In the United States the ac electricity delivered by tes of ac and dc are show n in Fig.1-3.Time ―(a)Fig. 1-3 (a) Steady-state direct curre nt (de) (b) Alter nat ing curre nt(ac)Part 2 Kirchhoff' s Current LawTwo of the most fun dame ntal properties of circuits were established experime ntally a cen tury and a half ago by a Germa n professor, Gustav Robert Kirchhoff (1824 - 1887). The first property, known as Kirchhoff ' s current law (abbreviated KCL), states that at every instant of time the sum of the curre nts flow ing into any node of a circuit must equal the sum of the curre nts leavi ng the no de, where a node is any spot where two or more wires are join ed. This is a very simple, but powerful con cept. It is in tuitively obvious once you assert that curre nt is the flow of charge, and that charge is con servative—n either being created nor destroyed as it en ters a no de. Uni ess charge somehow builds up at a no de, which it does not, the n the rate at which charge en ters a node must equal the rate at which charge leaves the no de.There are several alter native ways to state Kirchhoff ' s curre nt law. The most com monly used stateme nt says that the sum of the curre nts flow ing into a node is zero as show n in Fig. 1-4a, in which case some of those curre nts must have n egative values while some have positive values. Equally valid would be the stateme nt that the sum of the curre nts leav ing a node must be zero as show n in Fig. 1-4b(aga in some of these curre nts n eed to have positive values and some n egative). Fin ally, we could say that the sum of the curre nts en teri ng a node equals the sum of the curre nts leav ing a node (Fig. 1-4c). These are all equivale nt as long as we un dersta nd what is meant about the directi on of curre nt flow whe n we in dicate it with an arrow on a circuit diagram. Curre nt that actually flows in the directi on show n by the arrow is give n a positive sig n. Curre nts that actuallyflow in the opposite direct ion have n egative values.(a) The sum of the curre nts into a node equals zero(b) The sum of the curre nts leav ing the node is zero(c) The sum of the curre nts en teri ng a node equals the sum of the curre nts leavi ng the node Note that you can draw curre nt arrows in any directio n that you want — that much is arbitrary — but once havi ng draw n the arrows, you must the n write Kirchhoff ' s curre nt law in a manner that is con siste nt with your arrows, as has bee n done in Fig.1-4. The algebraic soluti on to the circuit problem will automatically determ ine whether or not your arbitrarily determ ined direct ions for curre nts were correct.Example 1.1 Using Kirchhoff ' s Current LawA node of a circuit is shown with current direction arrows chosen arbitrarily. Havingpicked those directi on s, i1 = - 5 A, i2 = 3 A, and i3 = - 1 A. Write an expressi on for Kirchhoff ' s current law and solve for i4.Solution. By Kirchhoff ' s current law,i1 + i2 = i3 + i4 so thatThat is, i4is actually 1 A flowi ng into the no de. Note that i2, i3, and i4 are all en teri ng the no de, and i1 is the only curre nt that is leavi ng the no de.Part 3 Kirchhoff ' s Voltage LawElectr ons won ' t flow through a circuit uni ess they are give n some en ergy to help send them on their way. That “ push ” is measured in volts, where voltage is defi ned to be the amount nodenodenode1 + i4 i4 = - 1 AFig. 1-4 lllustrating various ways that Kirchhoff ' s current law can be statedof en ergy (w, joules) give n to a un it of charge,v=dw/dq A 12-V battery therefore gives 12 joules of en ergy to each coulomb of charge that it stores. Note that the charge does not actually have to move for voltage to have meaning. Voltage describes the potential for charge to do work.While curre nts are measured through a circuit comp onent, voltages are measured across componen ts. Thus, for example, it is correct to say that curre nt through a battery is 10 A, while the voltage across that battery is 12 V. Other ways to describe the voltage across a comp onent in clude whether the voltage rises across the comp onent or drops. Thus, for example, for the simple circuit in Fig. 1-1, there is a voltage rise across the battery and voltage drop across the light bulb. Voltages are always measured with respect to someth ing. That is, the voltage of the positive terminal of the battery is“ so many volts ” with respect to the negative terminal; or, the voltage at a point in a circuit is some amount with respect to some other poin t. In Fig. 1-5, curre nt through a resistor results in a voltage drop from point A to point B of VAB volts. V A and VB arethe voltages at each end of the resistor, measured with respect to some other point.The reference point for voltages in a circuit is usually desig nated with a ground symbol. While many circuits are actually groun ded — that is, there is a path for curre nt to flow directly into the earth —some are not (such as the battery, wires, switch, and bulb in a flashlight). When a ground symbol is show n on a circuit diagram, you should con sider it to be merely a reference point at which thevoltage is defi ned to be zero. Fig.1-6 points out how cha nging the node labeled as ground cha nges the voltages at each node in the circuit, but does not cha nge the voltage drop across each comp onent.(1-2)Fig. 1-5 The voltage drop from point A to point B is V AB, where VAB = VA - VBThe sec ond of Kirchhoff ' s fun dame ntal laws states that the sum of the voltages around any loop of a circuit at any instant is zero. This is known as Kirchhoff ' s voltage law (KVL). Just as was the case for Kirchhoff ' s curre nt law, there are alter native, but equivale nt, ways of stat ing KVL. We can, for example, say that the sum of the voltage rises in any loop equals the sum of the voltagedrops around the loop. Thus in Fig. 1-6, there is a voltage rise of 12 V across the battery and avoltage drop of 3 V across R1 and a drop of 9 V across R2. ------------- Notice that it doesn' t matterwhich node was labeled ground for this to be true. Just as was the case with Kirchhoff ' s current law, we must be careful about labeli ng and in terpret ing the sig ns of voltages in a circuit diagram in order to write the proper vers ion of KVL. A plus (+) sig n on a circuit comp onent in dicates a reference direct ion un der the assumpti on that the pote ntial at that end of the comp onent is higher than the voltage at the other end. Aga in, as long as we are con siste nt in writi ng Kirchhoff ' s voltage law, the algebraic soluti on for the circuit will automatically take care of sig ns.Part 5 Summary of Principal Electrical QuantitiesThe key electrical qua ntities already in troduced and the releva nt relati on ships betwee n these quantities are summarized in Table 1-1.Since electrical quantities vary over such a large range of magnitudes, you will often find yourself work ing with very small qua ntities or very large qua ntities. For example, the voltage created by your TV antenna may be measured in millionths of a volt (microvolts, 卩V), while the power gen erated by a large power stati on may be measured in billi ons of watts, or gigawatts (GW). To describe quantities that may take on such extreme values, it is useful to have a system of prefixes that accompany the units. The most commonly used prefixes in electrical engineering are give n in Table 1-2.Part 6 Ideal Voltage Source and Ideal Current SourceElectric circuits are made up of a relatively small nu mber of differe nt kinds of circuiteleme nts, or comp onen ts, which can be in terc onn ected in an extraord in arily large nu mber of ways.At this point in our discussion, we will concentrate on idealized characteristics of these circuit eleme nts, realiz ing that real comp onents resemble, but do not exactly duplicate, the characteristics that we describe here.An ideal voltage source is one that provides a give n, known voltage vs, no matter what sort ofload it is conn ected to. That is, regardless of the curre nt draw n from the ideal voltage source, it will always provide the same voltage. Note that an ideal voltage source does not have to deliver a con sta nt voltage; for example, it may produce a sinu soidally vary ing voltage —the key is that voltage is not a fun ctio n of the amount of curre nt draw n. A symbol for an ideal voltage source is show n in Fig. 1-7.A special case of an ideal voltage source is an ideal battery that provides a con sta nt dc output, as show n in Fig. 1-8. A real battery approximates the ideal source; but as curre nt in creases, the output drops somewhat. To acco unt for that drop, quite ofte n the model used for a real battery is an ideal voltage source in series with the internal resista nee of the battery.An ideal curre nt source produces a give n amount of curre nt is no matter what load it sees. As show n in Fig. 1-9, a commo nly used symbol for such a device is circle with an arrow in dicati ng the directi on of curre nt flow. While a battery is a good approximati on to an ideal voltage source, there is nothing quite so familiar that approximates an ideal curre nt source. Some tran sistor circuits come close to this ideal and are ofte n modeled with idealized curre nt sources.Section II The electric power systemChapter 1 Brief Introduction to The Electric Power SystemNew Words and ExpressionsMinimum a 最小prime mover n 原动机gen erator n 发电机load n 负载furn ace n 炉膛boiler n 锅炉fissi on able n 可裂变的fissi on able material 核燃料Part 1 Minimum Power systemelevatio n n 高度，海拔internal combusti on engine 内燃机 steam-drive n turbi ne 汽轮机hydraulic turbi ne 水轮机convert v 变换，转换 shaft n 传动轴，轴 torquen 力矩servomecha nism n 伺服机构* Elements of a minimum electric power system *Types of energy source *Types of prime mover *Types of electrical load*Functions of the control systemA minimum electric power system is shown in Fig.1-1, the system consists of an energy source, a prime mover, a generator, and a load.The en ergy source may be coal, gas, or oil burned in a furnace to heat water and gen erate steam in a boiler; it may be fissi on able material which, in a nu clear reactor, will heat water to produce steam; it may be water in a pond at an elevatio n above the gen erat ing stati on; or it may be oil or gas burned in an internal combusti on engine.The prime mover may be a steam-driven turbine, a hydraulic turbine or water wheel, or aninternal combustion engine. Each one of these prime movers has the ability to convert energy in the form of heat, falling water, or fuel into rotation of a shaft, which in turn will drive theEnergy source Prime nioverGenerator Lx>adContjolFig* 1-1 The tninfnmm electric power systemgen erator.The electrical load on the gen erator may be lights, motors, heaters, or other devices, alone or in comb in ati on. Probably the load will vary from mi nute to min ute as differe nt dema nds occur. The control system functions (are ) to keep the speed of the machines substantially constant and the voltage within prescribed limits, even though the load may cha nge. To meet these load con diti on s, it is n ecessary for fuel in put to cha nge, for the prime mover in put to vary, and for the torque on the shaft from the prime mover to cha nge in order that the gen erator may be kept at con sta nt speed. In additi on, the field curre nt to the gen erator must be adjusted to maintain con sta nt output voltage. The con trol system may in clude a man stati oned in the power pla nt who watches a set of meters on the gen erator output term in als and makes the n ecessary adjustme nts manu ally .In a moder n stati on, the con trol system is a servomecha nism that sen ses gen erator-output con diti ons and automatically makes the n ecessary cha nges in en ergy in put and field curre nt to hold the electrical output with in certa in specificati ons.Part 2 More Complicated Systems*Foreword*Cases of power system with out circuit breaker *Power system with circuit breakerNew Words and Expressions1. associated2. circuit3. circuit breaker4. dee nergize5. dee nergized6. outage n7. diagram8. switch out of9. switch offIn most situati ons the load is not directly conn ected to the gen erator term in als. More com monlya 联接的 n 电路n 断路器 vt 切断，断电 adj 不带电的停电 n 简图退出来，断开 v 切断，关闭the load is some distanee from the generator, requiring a power line connecting them. It is desirable to keep the electric power supply at the load with in specificati ons. However, the con trols are near the generator, which may be in another building, perhaps several miles away.If the dista nce from the gen erator to the load is con siderable, it may be desirable to in stall transformers at the generator and at the load end, and to transmit the power over a high-voltage line (Fig.1-2). For the same power, the higher-voltage line carries less current, has lower losses for the same wire size, and provides more stable voltage., TransformerTransformerPrime 〔Mover Generator f C High-voltage line—Fig- 1-2 A generator connected through transformers anda high-voltage line to a distant loadIn some cases an overhead line may be un acceptable. In stead it may be adva ntageous to use an un dergro und cable. With the power systems talked above, the power supply to the load must be in terrupted if, for any reas on, any comp onent of the system must be moved from service for maintenance or repair.Additi onal system load may require more power tha n the gen erator can supply. Ano ther gen erator with its associated tran sformers and high-voltage line might be added.It can be shown that there are some advantages in making ties between the generators (1) and at the end of the high-voltage lines (2 and 3), as shown in Fig.1-3. This system will operate satisfactorily as long as no trouble develops or no equipment needs to be taken out of service.Kig. 1-3 A system with para)lei operation or the generators t of the transformers andof the transmission lintsThe above system may be vastly improved by the in troducti on of circuit breakers, which may be ope ned and closed as n eeded. Circuit breakers added to the system, Fig.1-4, permit selected piece of equipme nt to switch out of service without disturb ing the rema in der of system. With this arran geme nt any eleme nt of the system may be dee nergized for maintenance or repair by operati on of circuit breakers. Of course, if any piece of equipme nt is take n out of service, the n the total load must be carried by the remaining equipment. Attention must be given to avoid overloads duri ng such circumsta nces. If possible, outages of equipme nt are scheduled at times when load requireme nts are below no rmal.Low-voltageo=^GeneratorsFig.1-5 shows a system in which three gen erators and three loads are tied together by threeFig* 1-4 A system with necessary circuit breakerstran smissi on lin es. No circuit breakers are show n in this diagram, although many would berequired in such a system.Fis- 1-S Three generators supplying threeloads over hlgh-voltnge trAnsmlsston linesChapter 2 Faults on Power SystemNew Words and Expressions1. fault2. in terfere neen 干扰，防碍6. feed (fed)给。
电气工程专业-英语PPT优质课件
2.1 Grammar Features
3) The device includes an instrument transformation and a relay system which has two circuits in it.
The device includes an instrument transformation and a relay system with two circuits in it.
.
2.1 Grammar Features
③ 不定式
用不定式短语来替代表示目的和功能的从句或语句 (1) The capacity of individual generators is larger and larger so that the increasing demand of electric power is satisfied. The capacity of individual generators is larger and larger to satisfy the increasing demand of electric power.
专业英语（English for Special Science and Technology）
隶属于科技英语 是科技英语的一部分，以表达科技概念、理论与事实为主要 目的。遵守科技英语的语法体系和翻译方法;特别注重客观事实和真理，表达准 确、精练和正式。
是结合各自专业的科技英语 有很强的专业性，涉及的面更加狭窄，与专业内 容配合更为密切。
(3) 省略句使用频繁 (精炼) 省略成分：状语从句中的主语、全部或部分谓语；定语从句中的关系代词 which和that、从句中的助词等；还常用介词短语替代从句。
电气工程专业英语翻译1
第六章Electric Power Systems 电力系统Section 1 Introduction 第一节介绍The modern society depends on the electricity supply more heavily than ever before. 现代社会的电力供应依赖于更多地比以往任何时候。
It can not be imagined what the world should be if the electricity supply were interrupted all over the world. 它无法想象的世界应该是什么，如果电力供应中断了世界各地。
Electric power systems (or electric energy systems), providing electricity to the modern society, have become indispensable components of the industrial world. 电力系统（或电力能源系统），提供电力到现代社会，已成为不可缺少的组成部分产业界的。
The first complete electric power system (comprising a generator, cable, fuse, meter, and loads) was built by Thomas Edison – the historic Pearl Street Station in New York City which began operation in September 1882. 第一个完整的电力系统（包括发电机，电缆，熔断器，计量，并加载）的托马斯爱迪生所建-站纽约市珍珠街的历史始于1882年9月运作。
This was a DC system consisting of a steam-engine-driven DC generator supplying power to 59 customers within an area roughly 1.5 km in radius. The load, which consisted entirely of incandescent lamps, was supplied at 110 V through an underground cable system. 这是一个半径直流系统组成的一个蒸汽发动机驱动的直流发电机面积约1.5公里至59供电范围内的客户。
电气工程专业英语
电气工程专业英语Electrical Engineering专业英语1. Circuit analysis: 电路分析2. Power systems: 电力系统3. Control systems: 控制系统4. Electromagnetics: 电磁5. Electronics: 电子学6. Communication systems: 通信系统7. Digital signal processing: 数字信号处理8. Microelectronics: 微电子学9. Power electronics: 功率电子学10. Mechatronics: 机电一体化11. Electric machines and drives: 电机及驱动12. Renewable energy systems: 可再生能源系统13. High voltage engineering: 高压工程14. Electrical measurements: 电测量15. Electrical materials: 电材料16. Microwave engineering: 微波工程17. Optoelectronics: 光电子学18. Nanoelectronics: 纳米电子学19. Electromagnetic compatibility: 电磁兼容20. Robotics: 机器人学21. Artificial intelligence: 人工智能22. Embedded systems: 嵌入式系统23. Image and signal processing: 图像与信号处理24. Control theory: 控制理论25. Wireless communication: 无线通讯26. Power system protection: 电力系统保护27. Analog circuit design: 模拟电路设计28. Digital circuit design: 数字电路设计29. Fuzzy logic control: 模糊逻辑控制30. Biomedical engineering: 生物医学工程。
电气工程专业英语(电力类)翻译
实用资料：电气工程专业课(电力类)翻译参考专业外语：Professional English电路（上）electrical circuit (I)电路（下）electrical circuit (II)金工实习machinery practice电机（上）electrical machinery (I)电工实验与测试electrical experiment & test电子综合实践integrated electronic practice信号与系统signal & system电子技术基础（模拟）fundamentals of electronic (analog)电磁场electromagnetic field电子技术实验electronic experiment(I)电子辅助设计EDA Electronic Design Automatic(I)发电厂动力工程基础Heat power engineering in generating plant企业管理enterprise management电气主系统electrical system principle电力系统稳态/暂态分析Steady-State/ Transient-State Analysis of Power System 电力系统继电保护Power System Relaying Protection电力系统潮流计算机分析：Computer Analysis of Power Flow数字电子技术Digital Electrical Technique微机原理microcomputer principle电子技术基础（数字）fundamentals of electronic (digital)自动控制automatic control theory电力系统分析electric power system analysis电子技术基础实验electronic experiment(II)电气主系统课程设计electrical system principle-course design电子辅助设计EDA Electronic Design Automatic(II)通信与计算机网络communication & computer networks电力系统继电保护electric power system relaying电力系统继电保护Power System Protective Relaying电力系统远动技术electric power system remote protocol生产实习productive practice Technology继电保护课程设计electric power system relaying-course design电力电子技术power electronics电力电子技术基础：Fundamentals of Electronics Power Technology电力电子课程设计Power electronics course design电力系统自动控制electric power system control & automation高电压技术High voltage engineering Technology变电站自动化substation automation电力经济electric power system economics电能质量控制electric power quality control配电网自动化distribution system automation电力系统新技术new techniques on electric power system控制电机electrical machine control调度自动化与能量管理energy management & automation灵活交流输电系统flexible AC transmission system计算机保护computer protection电力系统电磁兼容EMC in electric power system毕业实习graduation practice毕业设计graduation dissertation数字信号处理：Digital Signal Processing自动控制理论：Automatic Control Theory电气工程基础：Fundamentals of Electrical Engineering电磁场概论：Introduction to Electro-Magnetic Field计算机继电保护：Microcomputer-Based Relaying Protection电气设备的绝缘检测与故障诊断：Insulation Diagnostics and Troubl-Shooting for Electrical Installations电网规划：Power System Planning可编程控制器原理及应用：Principles of PLC (Programmable logic Controller) And Application电磁场数值计算：Numerical Computation of Electro-Magnetic Field电力系统继电保护：Relay Protection of Power System电力系统自动装置原理The Principle of Electric Power System Automatic Equipment电力通信系统及调度自动化：Power System Communication and Dispatching Automatic专业方向电气工程Electrical Engineering电机与电器Electric Machines and Electric Apparatus电力系统及其自动化Power System and its Automation高电压与绝缘技术High Voltage and Insulation Technology电力电子与电力传动Power Electronics and Power Drives电工理论与新技术Theory and New Technology of Electrical Engineering电子科学与技术Electronics Science and Technology。
(完整版)电气工程及其自动化专业英语第一章课文翻译
第一章第一篇sectiongTwo variables u(t) and i(t) are the most basic concepts in an electric circuit, they characterize the various relationships in an electric circuitu(t)和i(t)这两个变量是电路中最基本的两个变量，它们刻划了电路的各种关系。
Charge and CurrentThe concept of electric charge is the underlying principle for explaining all electrical phenomena. Also, the most basic quantity in an electric circuit is the electric charge. Charge is an electrical property of the atomic particles of which matter consists, measured in coulombs (C).电荷和电流电荷的概念是用来解释所有电气现象的基本概念。
也即，电路中最基本的量是电荷。
电荷是构成物质的原子微粒的电气属性，它是以库仑为单位来度量的。
We know from elementary physics that all matter is made of fundamental building blocks known as atoms and that each atom consists of electrons, protons, and neutrons. We also know that the charge e on an electron is negative and equal in magnitude to 1.60210×10 19C, while a proton carries a positive charge of the same magnitude as the electron. The presence of equal numbers of protons and electrons leaves an atom neutrally charged.我们从基础物理得知一切物质是由被称为原子的基本构造部分组成的，并且每个原子是由电子，质子和中子组成的。
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电路 electric circuit电气工程electrical engineering 电机electric machine自然科学physical science电气设备 electrical device电器元件 electrical element正电荷positive charge负电荷negative charge直流direct current交流alternating current电压voltage导体conductor功work电动势electromotiveforce电势差potential difference功率power极性polarity能量守恒定律the law of conservation energy 变量variable电阻 resistance电阻率resistivity绝缘体insulator电阻器resistor无源元件passive element常数constant电导conductance短路short circuit开路open circuit线性的linear串联series并联parallel电压降voltage drop等效电阻equivalent resistance 电容器capacitor电感器inductor储能元件storage element电场electric field充电 charge放电discharge动态的dynamic电介质dielectric电容capacitance磁场magnetic field电源power supplu变压器transformer电机electric motor线圈coil电感inductance导线conducting wire绕组wingding漏电阻leakage resistance电子系统electronic system结构图block diagram功能模块functional block放大器amplifier滤波器filter整形电路wave-shaping circuit 振荡器oscillator增益gain输入阻抗input impedance带宽bandwidth晶体管transistor集成电路integrated circuit电力电子power electronics数字信号处理digital signal-processing 输出装置output device模拟信号analog signal数字信号digital signal传感器transducer采样值sample value模数转换器analog-to-digital converter 频谱frequency content采样频率sampling rate or frequendy扰动disturbance分立电路discrete circuit数字化信号digitized signal运算放大器operational amplifier有源电路active circuit电子部件electronic unit封装package管脚pin同相端noninverting terminal反相输入inverting input电路图circuit diagram压控电压源voltage-controlled voltage source 开环增益open-loop gain闭环增益closed-loop gain负反馈negative feedback正饱和positive saturation线性区linear region电压跟随器voltage follower等效阻抗equivalent impedance逻辑变量logic variable位bit数字字digital word字节byte半字节nibble与运算AND operation真值表truth table与门AND gate非门NOT gate或门OR gate加号addition sign与非门NANA gate异或运算XOR operation逻辑表达式logic expression 二进制binary system正逻辑positive logic负逻辑negative logic参考方向reference direction 理想变压器ideal transformer 电气绝缘electrical isolation阻抗匹配impedance matching电力electrical pewer绝缘变压器isolating transformer电压互感器voltage transformer电流互感器current transformer原边绕组primary winding工作频率operating frequency配电变压器distribution transformer 电力变压器power transformer磁通密度flux density磁场magnetic field铁芯变压器iron-core transformer大功率high-power空芯air-core磁耦合magnetic coupling小功率lower-power励磁损耗magnetizing loss磁滞损耗hysteresis loss涡流eddy current励磁电流exciting current漏磁通leakage flux互磁通 mutual flux线圈coil芯式core form壳式shell form高压绕组high-voltage winding 磁链flux linkage电动势electromotive force有效值root mean square value 匝数比turns ratio视在功率apparent power匝数the number of turns升压变压器step-up transformer 降压变压器step-down transformer 电动机motor发电机generator机械能mechanical energy电能electrical energy电磁的electromagnetic直线式电动机linear motor同步电机synchronous machine感应电机induction machine定子stator转子rotor气隙air gap轴shaft电枢armature励磁绕组field winding无功功率reactive power制动状态braking mode稳态steady-state相序phase sequence反响制动plugging滞后电流lagging current励磁电抗magnetizing reactance 启动电流starting current变频器frequency changer感应电势induced voltage逆变器inverter周波变换器cycloconverter换向器commutator自动控制automatic control控制器controller扰动disturbance期望值desired value压力pressure液位liquid level被控变量controlled variable 方框图block diagram传递函数transfer function 工程控制process control伺服系统servomechanism流率flow rate加速度acceleration前向通路forward path补偿correction反馈通路feedback path闭环closed-loop开环open-loop输出output增益gain手动调节manual adjustment变送器transducer误差error控制方式control mode比例控制proportional control 积分控制integral control微分控制derivative control 执行元件manipulating element 调节时间setting time残差residual error不确定度uncertainty观测数据observations采样sample算术平均arithmetic average 期望值expected value标准偏差standard deviation 下限lower range limit上限upper range limit跨度span分辨率resolution死区dead band灵敏度sensitivity阈值threshold可靠性reliability过量程overrange恢复时间recovery time过载overload过量程极限overrange limit 漂移drift准确性accuracy误差error重复性repeatability系统误差systemic error再现性reproducibility校准calibration线速度linear velocity角速度angular velocity弧度radian测速仪tachometer增量式编码器incremental encoder 定时计数器timed counter稳定性stability接口interface调节器conditioner开关switch执行器actuator电磁阀solenoid valve连续控制系统sequential control system 触点contact常开normally open常闭normally closed限位开关limit switch继电器relay延时继电器time-delay relay接通电流pull-in current开断电流drop-out current电机启动器motor starter接触器contactor自锁触点holding contact整流器rectifier变流器converter逆变器inverter二极管diode阳极anode阴极cathode正向偏置forward biased反向偏置reverse biased阻断block稳压二极管zener diode晶体管transistor集电极collector基极base发射极emitter共发射极common-emitter双向晶闸管triac正半周positive half-cycle 触发电流trigger circuit 功率容量power capability 功率器件power device晶闸管thyristor导通conduction正向阻断 forward-blocking通态on-state关断状态off-state反向击穿电压reverse breakdown voltage 漏电流leakage current电流额定值current rating漏极drain门极gate缓冲电路snubber circuit均流current sharing额定电压rated voltage可控开关controllable switch相控phase-controlled充电器charger工频line-frequency变换器converter整流rectification逆变inversion可逆调速revesible-speed再生制动regenerative barking关断时间turn-off time纯电阻负载pure resistive load脉动ripple感性负载inductance load周期time period带内部直流电动势的负载load witn an internal DC voltage 波形waveform换相commutation稳态steady state交流侧AC-side延时角delay angle交点intersection电力系统power system发电厂generating plant发电机generator负荷load输电网transmission nerwork 配电网distribution network 电electricity天然气natural gas原理图schematic diagram锅炉boiler热效率thermal efficiency 风力wind power断路器circuit breaker变电所substation故障fault过电压overvoltage击穿值breakdown value过电流over current可靠性reliability继电器relay触点contact电流互感器current transformer合闸线圈operating coil分闸线圈trip coilCircuit theory is also valuable to students specializing in other branches of the physical science because circuit are a good model for the study of energy system in general,and because of the applied mathematics,physics,and topology involved.电路理论对于专门研究自然科学其他分支的学生来说也十分有价值，因为电路一般可以很好地作为能量系统研究的模型，并且电路理论涉及应用数学、物理学和拓扑学的相关知识。