电气工程及其自动化 专业英语 第七章答案
电气工程及其自动化专业英语作业
专业英语作业（C2S3—P40）alog-DigitalConversionAnMany quantities have continuous values, including temperature, pressure,许多变量都有连续的量值，如温度，压力，displacement, rotation, voltage, current, and intensity of light and sound.位移，旋转角，电压，电流以及光和声音的强度。
The task of quantizing the continuous values into a binary scale is called analog-to-digital conversion (ADC).将连续量化为二进制数字的工作称为模数转换（ADC）Digital-to-analog conversion (DAC) is the inverse process,in which data in discrete values, are converted or restored to a continuously variable form.数模转换是一个相反的过程，它将离散的数据转化或恢复为一个连续可变的形式。
The transducer is the name of the device that produces a voltage or a current proportional to the physical phenomenon to which it responds.传感器是一种装置，它能产生与所反映的实际现象成比例的电压或者电流Analog-to-digital conversion模数转换Only two basic techniques exist for analog-to-digital conversion (ADC).ADC有两种基本方法One is to compare the analog voltage amplitude to a binary voltage scale in which the match yield the binary number that corresponds to the amplitude.一种方法是将模拟电压幅值和二进制电压作比较，在此比较过程中产生与幅值相对应的二进制数。
电气工程及其自动化专业英语(语法部分)
Specialized English for Electrical Engineering ＆ Its Automation
戴文进 编著
电气工程及其自动化专业教研室
Introduction
• 1 Importance
• 2 Purpose Train students’ comprehension and application ability to
• 另外，专业词汇的词义普遍比较单一，词汇中前 缀和后缀出现的频率很高，缩略语使用的比较多。
电气工程及其自动化专业教研室
词汇的分类( lexical classification)
1 技术词汇(special technical words )---某个专业所特有的词汇，如 diode, substation，autotransformer，superconductivity.
Application, implementation
电气工程及其自动化专业教研室
词汇的构成( words constitution)
专业词汇构成的特征(1)有50%以上的专业词汇来 自外来语;(2)广泛地使用构词法;(3)常用词汇专业化. 1合成法( composition)
horsepower, push-pull, power utilization 2 转换法(conversion)
• Other characteristic, such as frequency, wave shape, and phase balance are seldom recognized by the consumers, but are given constant attention by electric power utility engineers.
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。
电气工程及其自动化专业英语 Chapter 7 Power System Protections
Section 1 Introduction
（6）Phase sequence relays such as (i) negative sequence relays and, (ii) zero sequence relays, （7）Differential relays and percentage differential relays, （8）Distance relays such as (i) plane impedance relays, (ii) angle impedance relays, i.e. Ohm or reactance relays, (iii) angle admittance relays, i.e. Mho relays and, (iv) offset and restricted relays, （9）Pilot relays such as (i) wire pilot relays, (ii) carrier channel pilot relays, (iii) microwave pilot relays.
Chapter 7
Power System Protections
Section 1 Introduction
Text
New Words and Expressions Resume
Exercises
End
Section 1 Introduction
The steady-state operation of a power system is frequently disturbed by various faults on electrical equipment. To maintain the proper operation of the power system, an effective, efficient and reliable protection scheme is required. Power system components are designed to operate under normal operating conditions. However, if due to any reason, say a fault, there is an abnormality, it is necessary that there should be a device which senses these abnormal conditions and if so, the element or component where such an abnormality has taken
(最新整理)(完整版)电气工程及其自动化专业英语
电气工程及其自动化专业教研室
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• The exciting or magnetizing current （励磁电流）can thus be very small. Further, the proportion of the total flux which is linked mutually by the two coils is greatly increased.
of two coils in close proximity. One coil of N1 turns is excited with
alternating current and therefore establishes a flux φ11 which alternates with the current (随时间交变）. The other coil is linked
• the applied voltage 外施电压
• zero-power-factor 零功率因数
• the no-load power factor 空载功率因数
• formulate 用公式表示,系统地阐述
• saturation 饱和
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电气工程及其自动化专业教研室
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Unit 11 The Transformer on No Load
a result (因此), is called the secondary winding.
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电气工程及其自动化专业教研室
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• It should not be difficult to realize that the two functions are interchangeable: if coil 2 were excited instead, a mutual e.m.f. would be induced in coil 1 which would then become the secondary winding(二次绕组).
电气工程与自动化专业英语 第7章
This chapter is concerned with how the induction motor(电感电动机) behaves when connected to a constant frequency supply. This is by far the most widely used and important mode of operation, the motor running directly connected to a constant voltage mains supply. In addition, equivalent circuit of induction motor is developed in this chapter.
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7.1 Run-up and Stable Operating Regions
Steady-state rotor losses and efficiency This is that it is never possible for all the power crossing the air-gap from the stator to be converted to mechanical output, because some is always lost as heat in the rotor circuit resistance. In fact, it turns out that at slip s the total power (Pr) crossing the air-gap always divides so that a fraction sPr is lost as heat, while the remainder (1-s)Pr is converted to useful mechanical output.
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苏小林课后答案
电气工程及其自动化专业英语苏小林课后答案【篇一：电气工程及其自动化准耶英语】/p> characterize描绘…的特征，塑造人物，具有….的特征property 性质，财产equal in magnitude to 在数量（数量级）上等同于 convert 转换converter 转换器time rate 时间变化率mathematically 从数学上来讲differentiatev 区分，区别in honor of 为纪念某人 name in honor of为纪念某人而以他命名electromotive force （ e m f ）电动势voltaic battery 伏打电池，化学电池an element 一个电器元件interpret 口译，解释，说明potential difference/voltage 电势差/电压 expend 花费，消耗instantaneous 瞬时的，促发的passive sign convention 关联参考方向the law of conservation of energy 能量守恒定律 reference polarity 参考极性electron 电子 electronic 电子的 electric 电的，电动的 time-varying 时变的 constant-valued 常量的metallic 金属的be due to 是因为，由于，归功于building block 模块coulomb库伦，ampere安培，joule焦耳，volt伏特，watt瓦特，work 功变量u（t），i(t)是电路中最基本的概念。
他们描述了电路中的各种关系。
电荷量的概念是解释电现象的基本原理，电荷量也是电路中最基本的量。
电荷也是构成物质的原子的电器属性，量纲是库伦。
我们从初等物理可以得知所有物质是由基本组成部分原子组成，而原子又包括电子（electron），质子（proton）和中子（neutron）我们都知道电荷e是带负电的电子，在数量上等于1.60210*1019 c, 而质子携带同等电荷量的正电荷，相同数量的质子，电子使原子呈现电中性（neutrally charged）。
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
(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。
电气工程及其自动化专业英语苏小林课后答案
电气工程及其自动化专业英语苏小林课后答案【篇一：电气工程及其自动化准耶英语】/p> characterize描绘…的特征，塑造人物，具有….的特征property 性质，财产equal in magnitude to 在数量（数量级）上等同于 convert 转换converter 转换器time rate 时间变化率mathematically 从数学上来讲differentiatev 区分，区别in honor of 为纪念某人 name in honor of为纪念某人而以他命名electromotive force （ e m f ）电动势voltaic battery 伏打电池，化学电池an element 一个电器元件interpret 口译，解释，说明potential difference/voltage 电势差/电压 expend 花费，消耗instantaneous 瞬时的，促发的passive sign convention 关联参考方向the law of conservation of energy 能量守恒定律 reference polarity 参考极性electron 电子 electronic 电子的 electric 电的，电动的 time-varying 时变的 constant-valued 常量的metallic 金属的be due to 是因为，由于，归功于building block 模块coulomb库伦，ampere安培，joule焦耳，volt伏特，watt瓦特，work 功变量u（t），i(t)是电路中最基本的概念。
他们描述了电路中的各种关系。
电荷量的概念是解释电现象的基本原理，电荷量也是电路中最基本的量。
电荷也是构成物质的原子的电器属性，量纲是库伦。
我们从初等物理可以得知所有物质是由基本组成部分原子组成，而原子又包括电子（electron），质子（proton）和中子（neutron）我们都知道电荷e是带负电的电子，在数量上等于1.60210*1019 c, 而质子携带同等电荷量的正电荷，相同数量的质子，电子使原子呈现电中性（neutrally charged）。
《 电气自动化专业英语》 习题解答
第一单元EXERCISE 11．F 2．F 3．T 4．T 5．FEXERCISE 21．有源元件2．Ohm’s Law3．电势差4．applied voltage5．绝缘材料6．positive protons 7．电子器件8．depletion zone EXERCISE 31．C 2．E 3．B 4．F 5．D 6．A EXERCISE 41．交流2．数/模转换3．音频4．自动频率控制5．自动增益控制6．调幅EXERCISE 51．Emitter (E) 2．p-type Emitter region 3．n- type Base region4．p-type Collector region 5．Collector (C) 6．Emitter-Base Junction (EBJ)7．Base (B) 8．Collector-Base Junction (CBJ) 9．PNP练习答案242EXERCISE 71．B 2．A 3．D 4．E 5．C第二单元EXERCISE 11．F 2．T 3．F 4．F 5.TEXERCISE 21．混合电路2．numeric value 3．离散值4．digital circuit 5．调谐电路6．printed circuit board 7．替换模型8．closed path EXERCISE 31．C 2．D 3．B 4．AEXERCISE 41．异步传输模式2．计算机辅助教学3．电荷耦合器件4．码分多址5．压缩只读光盘6．数字信号处理EXERCISE 51．BATTERY (1) 2．TOGGLE SWITCH 3．PUSH TO MAKE (A) 4．PUSH TO MAKE (B) 5．BATTERY (2) 6．MOTOR 7．RELAY练习答案243EXERCISE 7 1．C2．A3．D4．B第三单元EXERCISE 1 1．F2．F3．F4．T5．TEXERCISE 2 1．数字电子电路 2．voltage level 3．逻辑门4．AND gate 5．计算机处理能力 6．switch off7．逻辑电路8．processing chipEXERCISE 3 1．C2．F3．A4．G5．D6．B7．EEXERCISE 4 1．计算机辅助工程 2．计算机辅助制造 3．数据流程图 4．数字视频光盘5．电动势6．柔性制造系统EXERCISE 5 1．Insulation2．Silicon chip 3．Connection wires 4．Terminal pins5．Base plate6．Plastic caseEXERCISE 7 1．C2．B3．A练习答案244 第四单元EXERCISE 11．F 2．F 3．F 4．T 5．TEXERCISE 21．发光二极管2．reverse bias 3．场效晶体管4．depletion region5．运算放大器6．integrated circuit 7．电场8．bipolar junction transistor EXERCISE 31．C 2．E 3．A 4．D 5．BEXERCISE 41．功能电刺激2．调频3．全球定位系统4．硬盘5．高清晰度电视6．高频EXERCISE 51．Diodes 2．Piezo Buzzer 3．Transistor 4．Transformer 5．Relay 6．Inductors 7．Integrated Circuits (IC’s)8．Capacitors 9．Crystal 10．ResistorsEXERCISE 71．C 2．A 3．E 4．B 5．F 6．D第五单元EXERCISE 11．F 2．F 3．T 4．F 5．TEXERCISE 21．机械传感器2．redox electrode 3．可见光谱4．metal detector 5．热传感器6．strain gauge 7．流量计8．radar gun EXERCISE 31．B 2．A 3．C 4．E 5．D练习答案245EXERCISE 4 1．集成电路2．智能决策支持系统 3．智能网络 4．解释结构建模法 5．综合业务数字网6．知识库管理系统EXERCISE 5 1．Protection tube2．Titania element 3．Gasket 4．Carrier substrate5．Metal body with hexagon nut 6．Ceramic holder 7．Glass insulation 8．Outer metal body9．Signal cable10．SealEXERCISE 7 1．C2．A3．B第六单元EXERCISE 1 1．T2．T3．T4．F5．FEXERCISE 2 1．直流电2．source of electricity 3．交流电4．power dissipation 5．配电系统 6．magnet pole7．电压脉冲8．wire coilEXERCISE 3 1．B2．D 3．F 4．A 5．E 6．CEXERCISE 41．基尔霍夫电流定律 2．基尔霍夫电压定律 3．液晶显示器 4．发光二极管5．环路滤波器6．线性二次调节器练习答案EXERCISE 51．Motor Housing 2．Stator Winding 3．Rotor 4．Winding Support and Cooling Jacket 5．Front Bearings 6．Shaft7．Coolant Inlet 8．Coolant Outlet 9．Rear Bearings 10．Feedback SensorEXERCISE 71．B 2．A 3．D 4．C第七单元EXERCISE 11．T 2．F 3．T 4．F 5．FEXERCISE 21．装配线2．PLC 3．数控机床4．nominal voltage 5．继电器触点6．multiple inputs 7．光传感器8．AC power EXERCISE 31．C 2．E 3．A 4．D 5．BEXERCISE 41．制造自动化2．模型库3．最经济控制4．平均无故障时间5．金属氧化物半导体6．中波EXERCISE 51．Connections 2．Programming port Run/ Halt switch Screwdriver inputs 3．Status IO indicators 4．Optional Battery 5．I/O Module Connectors 6．Output Terminals 7．Input Terminals 8．Power-supply Terminals EXERCISE 7246练习答案1．B 2．C 3．A247练习答案248 第八单元EXERCISE 11．T 2．F 3．F 4．T 5．TEXERCISE 21．基础元件2．positive feedback 3．闭环系统4．component value 5．负反馈6．set parameter 7．巡航控制8．open-loop system EXERCISE 31．C 2．E 3．B 4．A 5．DEXERCISE 41．光放大器2．开发系统互联3．脉冲编码调制4．鉴相器5．锁相器6．模式识别EXERCISE 51．GND 2．TRIGGER 3．OUTPUT 4．RESET 5．CONTROL VOLTAGE 6．THRESHOLD 7．DISCHARGEEXERCISE 71．C 2．A 3．E 4．B 5．D第九单元EXERCISE 11．F 2．F 3．F 4．T 5．TEXERCISE 21．集成电路2．Read Only Memory (ROM) 3．随机存储器4．frequency stabilization 5．串行通信6．power supply circuit 7．输入/输出口8．general-purpose registerEXERCISE 3练习答案1．C 2．E 3．B 4．A 5．DEXERCISE 41．可编程序逻辑控制器2．质量管理3．射频4．平面关节型机器人5．异步串行接口6．通用串行总线EXERCISE 51．Microcontroller 2．PLL 3．Oscillator 4．SPI PC 5．Microprocessor 6．RAM 7．Program Memory 8．EEPROM EXERCISE 71．C 2．A 3．D 4．B第十单元EXERCISE 11．T 2．F 3．T 4．F 5．FEXERCISE 21．传感系统2．relative motion 3．自由度4．work volume5．定向机构6．position mechanism 7．公法线8．forward kinematics EXERCISE 31．C 2．A 3．F 4．E 5．B 6．DEXERCISE 41．超高频2．录像机3．可视图形适配器4．甚高频5．无线应用协议6．方法库EXERCISE 51．Battery 2．CCD(Charge Coupled Device) 3．Sensor Board 4．Lean Sensor 5．ANT 6．Motor Controller Board 7．FSR (Pressure Sensor) EXERCISE 7249练习答案1．C 2．E 3．A 4．B 5．D 250。
(完整版)电气《专业英语》教案
5
第三章Power Electronic Technology
3.1Semiconductor Switches
3.2 The DC-DC Converters
1. 课文词汇，难长句解析，全文翻译，练习；
2. 词义的转换。
P59Ⅲ，P66Ⅲ
6
第三章Power Electronic Technology
1. 课文词汇，难长句解析，全文翻译，练习；
2. 词义选择；
3. 词义的引申。
P41Ⅱ，P48Ⅲ
4
第二章Electronics
2.3 Analog–Digital Conversion
2.4 Operational Amplifiers
1. 课文词汇，难长句解析，全文翻译，练习；
2. 长难句的分析。
P72Ⅲ
8
第四章Electric Machinery
4.2 Performance Characteristics of Induction Motors
1. 课文词汇，难长句解析，全文翻译，练习；
2. 否定句的翻译。
P78Ⅲ，P84Ⅲ
9
第五章Computer
5.1 Computer Basis
1. 课文词汇，难长句解析，全文翻译，练习；
2. 产品技术说明书的撰写。
P167Ⅲ，P174Ⅱ
13
第8章Electric Power Generation
8.1 Coal-Fired Power Plants
8.2 Hydropower Plants
1. 课文词汇，难长句解析，全文翻译，练习；
2. 掌握课文及英语科技论文的结构。
P195Ⅲ，P201Ⅱ
电气工程及其自动化专业英语课后练习题含答案
电气工程及其自动化专业英语课后练习题含答案Chapter 1: Introduction to Electrical EngineeringExercise 1.11.What is electrical engineering?2.List some common applications of electrical engineering. some famous electrical engineers.Answers:1.Electrical engineering is a field of engineering that dealswith the study and application of electricity, electronics, and electromagnetism.mon applications of electrical engineering include powergeneration, transportation systems, communication systems,lighting systems, and control systems.3.Some famous electrical engineers include Nikola Tesla,Thomas Edison, Michael Faraday, James Clerk Maxwell, and Samuel Morse.Exercise 1.21.What is the difference between DC and AC?2.What is the purpose of a transformer? some common electrical units.Answers:1.DC (direct current) is the flow of electric charge in asingle direction, whereas AC (alternating current) is the flow of electric charge that reverses direction periodically.2.The purpose of a transformer is to transfer electricalenergy from one circuit to another by means of electromagnetic induction.mon electrical units include voltage (volts), current(amps), resistance (ohms), power (watts), capacitance (farads), and inductance (henries).Chapter 2: Circuit AnalysisExercise 2.11.W hat is Kirchhoff’s current law?2.What is Kirchhoff’s voltage law? some common circuit elements.Answers:1.Kirchhoff’s current law states that the total currententering a junction must equal the total current leaving thejunction.2.Kirchhoff’s voltage la w states that the total voltagearound a closed loop must equal zero.mon circuit elements include resistors, capacitors,inductors, diodes, transistors, and operational amplifiers.Exercise 2.21.What is the difference between an open circuit and a shortcircuit?2.What is a series circuit?3.What is a parallel circuit?Answers:1.An open circuit is a circuit that is not complete and doesnot allow the flow of current, whereas a short circuit is acircuit that has a very low resistance and allows the flow ofcurrent to bypass the normal path.2.A series circuit is a circuit in which the components areconnected end to end so that the same current flows through each component.3.A parallel circuit is a circuit in which the components areconnected in parallel so that the voltage across each component is the same and the total current is divided among the components. Chapter 3: ElectromagnetismExercise 3.11.What is an electromagnetic wave?2.What is Faraday’s law of electromagnetic induction?3.What is Lenz’s law?Answers:1.An electromagnetic wave is a wave that is composed ofelectric and magnetic fields that are oscillating at right angles to each other and to the direction of propagation.2.Faraday’s law of electromagnetic induction states that achanging magnetic field induces an electromotive force (EMF) in a conductor that is proportional to the rate of change of themagnetic field.3.Lenz’s law states that the direction of the induced EMF issuch that it opposes the change that produced it.Exercise 3.21.What is a solenoid?2.What is the Lorentz force law?3.What is magnetic hysteresis?Answers:1.A solenoid is a coil of wire that is used to create amagnetic field when an electric current is passed through it.2.The Lorentz force law states that a charged particle that ismoving through a magnetic field experiences a force that isperpendicular to both the direction of motion and the direction of the magnetic field.3.Magnetic hysteresis is the tendency of a magnetic materialto remn magnetized even after the external magnetic field isremoved.ConclusionIn conclusion, electrical engineering is a fascinating field that involves the study and application of electricity, electronics, and electromagnetism. It is used in many common applications, such as power generation, transportation systems, and communication systems. To besuccessful in this field, it is important to have a good understanding of circuit analysis, electromagnetism, and other key concepts. These exercises should help to reinforce your understanding of the material and prepare you for future challenges in this field.。
电气工程及其自动化-自动化-专业英语重点-考试题
四川理工的学弟学妹们，特别是自电学院的兄弟伙们，专业英语难过啊，是否需要这个呢？我的淘宝店铺：信诚悦购包你80分电气自动化、自动化专业英语课堂笔记一．短语互译（10个，每个2分，共20分）1、DC/AC：direct/alternating current.(直流/交流)2、a good rule of thumb.（根据经验）3、step-up/step-down transformer(升压/降压变压器）autotransformer(自耦变压器)4、gate-turn-off thyristor [θai'ristə](门极可关断晶闸管）5、silicon-controlled rectifier(可控硅整流器）6、forward voltage drop(正向压降)7、reverse breakdown voltage(反向击穿电压）8、reverse leakage current（反向漏电流）9、peak reverse voltage（反向峰值电压）10、forced commutation(强制换流）11、three-phase ac squirrel cage induction motor（三相交流鼠笼式感应电机）12、AM/FM :amplitude/frequency modulation(调幅/调频)13、active/passive filter（有源/无源滤波器）14、bistable circuit(双稳电路)15、flip-flop（触发器）16、emf：electromotive [i,lektrəu'məutiv] force(电动势)17、magnetic flux（磁通）18、magnetizing current（磁化电流/励磁电流）19、general-purpose relay（通用继电器）20、solid-state relay(固态继电器)21、time constant（时间常数）22、ADC：analog-to-digital conversion （模数转换器）二、汉译英（5-6个，共30分，2个课外）1、通过互联网进行商业交易，其便利性和速度是推动电子商品快速发展的主要因素。
电气工程专业英语+unt7
7.1 Introduction
New Words and Expressions
property logarithmic deviation offset n. 财产；所有物；所有权；性质；特性 adj. 对数的 n. 背离 n. 偏移量；抵消；弥补；分支 vt. 弥补；抵消 vi. 偏移；形成分支 n. 偏见；偏爱；斜线 vt. （使）存偏见 n. 波特图 n. 冲洗；漂流物；观望；漂流 v.（使）漂流
7.1 Introduction text in a thermometer moves 1cm when the temperature changes by 1℃, the sensitivity is 1cm/℃ (it is basically the slope Dy/Dx assuming a linear characteristic). Sensors that measure very small changes must have very high sensitivities. Sensors also have an impact on what they measure; for instance, a room temperature thermometer inserted into a hot cup of liquid cools the liquid while the liquid heats the thermometer. Sensors need to be designed to have a small effect on what is measured; making the sensor smaller often improves this and may introduce other advantages. Technological
电气工程及其自动化专业大学英语答案
1. C2. B3. C4. A5. D6. A7. D 8. C 9. A 10. C 11. A 12. C 13. D 14. A 15. B 16. D 17. D 18. B 19. D 20. C 21. A 22. B 23. B 24. D 25. B 26. B 27. B 28. C 29. B 30. C 31. A 32. D 33. B 34. C 35. D 36. D 37. B 38. B 39. B 40. C41. 任何有价值的梦想就是一个值得实现的梦想。
42. 他和她握手就好像他们一生都互相了解。
43. 因此，需要采取更有效的措施和更有力的行动去对抗所有种类的犯罪，那样我们生活的世界可能变得更适宜居住。
44. After talking with the teacher for long time, we find the way to solve that question.45. She promised to steal the book that Tom bought yesterday.Cause and effectNow in the modern society many people smoke .Especially some young people who imitate their parents. Sometimes they don’t care about where they are. What’s more, someone who likes smoking can use more than ten cigarettes.Not only does smoking make great harm to people’s health, but also effect their attitude towards life to some extent .Some of them addicted to smoking, which make them spare little timeinto other activities .As we know, smoking also can make people get cancer and even die .In all, smoking is harmful in many aspects. W e should not smoke at all.。