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
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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。