第一篇:电气工程及自动化中国矿业大学专业英语考试课文翻译及单词全部
angular角的,角度的Angular displacement 角位移
Active power balance有功功率平衡
AC transmission交流输电 Accelerate加速,促进
Automatic voltage regulator自动电压调节器 Automatic generation control(AGC)自动发电控制 Asynchronous异步的 Bus母线
booster升电压 Cable电缆; Customer客户
Contingency意外事故,偶然事故
compensators(SVCs)静止无功补偿器
Disturbance扰动,干扰 Damp阻尼,减弱
Damping torque 阻尼转矩 Decelerate减速 Dry period枯水期
Distributionsystem 配电系统
Excitation voltage励磁电压 Electric powersystem 电力系统
Economic dispatch/operation经济调度/经济运行 Emission排放,放出 Electric clock电钟
Electromechanical机电的 Eletromagnetic电磁的 Equilibrium平衡;均衡 Flexibility灵活性;机动性 First-swing第一次摇摆 Fluctuation波动,起伏 Fuse保险丝
Facility容易;方便 灵活; Fossil化石,石块
Feeder馈线,馈电电路 Overload过载,超载 Outage停电,断电
Optimal优化的,最优的 Out of step失步 Power versus angle relationship 功角关系 Power loss功率损耗
Production cost生产成本,Primary energy 一次能源 Power-angle relationship功角关系
Paramount 最高的;头等的 Post-Disturbance干扰后的 Meter米;测量仪表 Misoperation误操作
Magnetizing current激磁电流
Mechanism机理,机制 Mechanical energy机械能 Mechanical/electrical torque机械/电气转矩 Reliable可靠的Replenishment(再)补充,充实
Rotor angle stability转角稳定性
Radius半径
Reactive/active power无功/有功功率
Redundancy 多余,冗余 Small-signal stability小信号稳定性
Subsystem子系统,分系统 Switching device 开关装置 Subtransmission 二次输电 Subtransmission system 二次输电系统
Synchronous reactance同步电抗,功率---角度关系 Synchronous condenser同步调相机
Synchronizing torque 同步转矩
Synchronously同步地
Shunt capacitor/reactor并联电容器/并联电抗器
Static var Series capacitor串联电容器
Speed governor调速器 Substation变电所,变电站 Synchronism同步
Supplementary control辅助控制
Security安全性,可靠性 shedding低周减载
Short-circuit fault短路故障 Stabilize使。。。稳定 tap-changing transformer可调分接头变压器
Transmission system输电系统
Transmission line输电线路 Tie-line联络线 Throttle阀门
Thermal unit热力机组 Utility公用事业;效用 Unstable不稳定的 Underfrequency loadVar flow 无功潮流 Voltage drop电压降落
Voltage stability 电压稳定性
Hydro-generation水力发电 Hydraulic水力(学)的,水压的in parallel 并联地 Instability不稳定性
Incandescent lamp白炽灯 Interconnection相互连接 Load-frequency control(LFC)负荷频率控制
Nominal frequency额定频率
Non-oscillatory非振荡的,非周期的
第二篇:电气工程及自动化专业自荐书
自荐书
尊敬的领导:
您好!
我是XX大学电气工程与自动化专业的一名应届本科毕业生。通过对贵公司的一些初步了解,本人有意加盟贵公司,为公司尽一份力。为便于公司对我的了解,现自我简介如下:
大学四年,是我来之不易的学习机会。在这大好时光里,我本着学好本专业,尽量扩大知识面,并加强能力锻炼的原则,大量汲取知识财富,锻炼了自己的各种能力。我努力的学习基础课,深研专业知识,并取得了优异的成绩,多次名列前茅,连年获得奖学金。本人在几年中系统学习了电气工程、控制科学与工程、计算机科学与技术、电路原理、电子技术基础、计算机原理及应用、计算机软件基础、控制理论、电机与拖动、电力电子技术、信号分析与处理、电力拖动控制系统、工业过程控制与自动化仪表等。高年级可根据社会需要设置柔性的专业方向模块课及选修课。
通过学习,本人是能够系统掌握工业与电气工程有关的运动控制、工业过程控制、电气工程、电力电子技术、检测与自动化仪表、电子与计算机技术等领域从事工程设计、系统分析、系统运行、研制开发、经济管理等方面的高级工程技术人才。
通过几年的学习,本人具备以下几方面的知识和能力:
1具备.电工技术、电子技术、自动控制理论、信息处理、计算机技术与应用等较宽广领域的工程技术基础和一定的专业知识。
2.受到过电工电子、信息控制及计算机技术方面的基本训练。
3.具有工业过程控制与分析,解决强弱电并举的宽口径专业的技术问题的能力。
此外,利用课余时间,我还多次参加各种文体活动,锻炼了自己的交际能力。参加各种兴趣小组,将所学用于实践,加强了自己的动手能力。因出色的表现,在一年级就参加了校党委主办的党校学习,并以优异的成绩毕业。同时,我还根据自己的兴趣,辅修经贸英语,选修二外日语等多门人文,管理课程,使自己不仅成为一个合格的专业人才,而且努力成为一个知识全面,涉猎广泛的全方位人才。
21世纪呼唤综合性的人才,在几年的学习生活中掌握了应学的专业知识,并通过学校的考核。同时,在课余学习了计算机知识,能熟练使用网络,快速的在网上查找所需要的资料,能简单运用办公应用软件(Word、Excel),还简单学习过FLASH动画设计、网页制作、Photoshop平面设计等入门课程。在日常工作中,我学会了以积极乐观的心态面对生活,同时也认识了很多不同性格的朋友,与其交往中更磨练了自己的意志,使我责任心更强,更能吃苦耐劳,更应诚实、守信。我有很强的动手能力,并且脚踏实地努力的办好每一件事。在不断的学习、生活中养成的严谨塌实的工作作风和团体协作的精神,我体会到过去并不代表未来,勤奋才是真实的内涵,只有实际工作才能不断的完善自己,才能做好本职工作。
“宽以待人、洁身自好”是我的处世原则;“精益求精、勇于进取”是我的精神信念;“兢兢业业、不断创新”是我的工作方式。我自信我的能力和热情使我能胜任贵公司的技术开发及其他有关方面的工作。希望公司给我一次参加面试的机会,我在此静候佳音。谢谢!
此致
敬礼!
自荐人:XXX
2011年1月1日
联系电话:158XXXXXXX
E-mail:
第三篇:电气工程及自动化专业自荐书
自荐书
尊敬的领导:
您好!
“宽以待人、洁身自好”是我的处世原则;“精益求精、勇于进取”是我的精神信念;“兢兢业业、不断创新”是我的工作方式。我自信我的能力和热情使我能胜任贵公司的技术开发及其它有关方面的工作。
我叫***,是内蒙古机电职业技术学院电气工程与自动化专业的一名应届专科毕业生。通过对贵公司的一些初步了解,本人有意加盟贵公司,为公司尽一份力。为便于公司对我的了解,现自我简介如下:
大学三年,是我来之不易的学习机会。在这大好时光里,我本着学好本专业,尽量扩大知识面,并加强能力锻炼的原则,大量汲取知识财富,锻炼了自己的各种能力。我努力的学习基础课,深研专业知识,并取得了优异的成绩,多次名列前茅,连年获得奖学金。本人在几年中系统学习了电气工程、计算机科学与技术、电路原理、电子技术基础、计算机原理及应用、计算机软件基础、控制理论、电机与拖动、电力电子技术、信号分析与处理、电力拖动控制系统、工业过程控制与自动化仪表等。高年级可根据社会需要设置柔性的专业方向模块课及选修课。
通过学习,本人是能够系统掌握工业与电气工程有关的运动控制、工业过程控制、电气工程、电力电子技术、检测与自动化仪表、电子与计算机技术等领域从事工程设计、系统分析、系统运行、研制开发、经济管理等方面的高级工程技术人才。
通过几年的学习,本人具备以下几方面的知识和能力:
1具备.电工技术、电子技术、自动控制理论、信息处理、计算机技术与应用等较宽广领域的工程技术基础和一定的专业知识。
2.受到过电工电子、信息控制及计算机技术方面的基本训练。
3.具有工业过程控制与分析,解决强弱电并举的宽口径专业的技术问题的能力。
希望贵公司能提供一个让我发挥专长的平台,我定会竭尽全力的在工作中取得好的成绩。
此致
敬礼!
自荐人:***2012年03月24日联系电话:**********
第四篇:电气工程及自动化专业自荐信
尊敬的贵公司领导:
您好!
非常感谢你能在百忙之中翻阅我的自荐信,但愿能给你带来一份惊喜!我是四川省工程职业技术学院电气工程及其自动化专业的毕业生,我叫XX,现年XX岁。在即将走出校园、迈向社会,开始新的人生旅途之际,我以满腔的热情和百倍的信心诚挚地向您推荐自己,希望能够加入贵公司的行列,为实现人生自我,学以致用,更为贵公司事业更上一层楼奉上一分绵薄之力。
当今是一个机遇与挑战并存,知识与能力齐驱的时代,只有不断地完善自我,才能成为激烈竞争中的弄潮儿,而几年的大学生活正提供了这一契机,让我受益菲浅,在良好的环境中进行学习与磨练,塑造一个全新的自我。最重要的是培养了我吃苦耐劳的精神,脚踏实地的作风,较强的社会工作能力。为了使自己能够全方位的发展,更好的适应这个日新月异的社会。
过去只能记载历史,应该好好把握的是未来。在以后的日子里,我会努力的工作,不断的充实自己,完善自己,超越自己。在社会实践工作方面,本着多学多练的态度,在实践中锻炼自己的工作能力、交际能力,培养团体协作的精神。如蒙不弃,我愿贵公司共创美好未来。给我一个机会,相信您不会后悔。
良禽择木而栖,倘蒙录用,当尽职尽责,不负所望。
第五篇: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sectiong Two variables u(t)and i(t)are the most basic concepts in an electric circuit, they characterize the various relationships in an electric circuit u(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 Current
The 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 1.60210×1019C, 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。我们还知道电子的电量是负的并且在数值上等于1.602100×10-12C,而质子所带的正电量在数值上与电子相等。质子和电子数量相同使得原子呈现电中性。
We consider the flow of electric charges.A unique feature of electric charge or electricity is the fact that it is mobile;that is, it can be transferred from one place to another, where it can be converted to another form of energy 让我们来考虑一下电荷的流动。电荷或电的特性是其运动的特性,也就是,它可以从一个地方被移送到另一个地方,在此它可以被转换成另外一种形式的能量。When a conducting wire is connected to a battery(a source of electromotive force), the charges are compelled to move;positive charges move in one direction while negative charges move in the opposite direction.This motion of charges creates electric current.It is conventional to take the currentflow 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 当我们把一根导线连接到某一电池上时(一种电动势源),电荷被外力驱使移动;正电荷朝一个方向移动而负电荷朝相反的方向移动。这种电荷的移动产生了电流。我们可以很方便地把电流看作是正电荷的移动,也即,与负电荷的流动方向相反,如图1-1所示。这一惯例是由美国科学家和发明家本杰明-富兰克林引入的。虽然我们现在知道金属导体中的电流是由负电荷引起的,但我们将遵循通用的惯例,即把电流看作是正电荷的单纯的流动。于是电流就是电荷的时率,它是以安培为单位来度量的。从数学上来说,电流i、电荷q以及时间t之
dqi间的关系是:
dt
The charge transferred between time t0 and t is obtained by integrating both sides of Eq.(1-1).We obtain 从时间t0到时间t所移送的电荷可由方程(1-1)两边积分求得。我们算得:
tq tidtThe way we define current as i in Eq.(1-l)suggests that current need not be a constant-valued function, charge can vary with time in several ways that may be represented by different kinds of mathematical functions 我们通过方程(1-1)定义电流的方式表明电流不必是一个恒值函数,电荷可以不同的方式随时间而变化,这些不同的方式可用各种数学函数表达出来。电压,能量和功率
To move the electron in a conductor in a particular direction requires some work or energy transfer.This work is performed by an external electromotive force(emf), typically represented by the battery
dwin Fig.l-1.This emf is also known as voltage or potential difference.uabThe voltage uab between two dqpoints a and b in an electric circuit is the energy(or work)needed to move a unit charge from a to b;mathematically 在导体中朝一个特定的方向移动电荷需要一些功或者能量的传递,这个功是由外部的电动势来完成的。图1-1所示的电池就是一个典型的例子。这种电动势也被称为电压或电位差。电路中a、b两点间的电压等于从a到b移动单位电荷所需的能量(或所需做的功)。数学表达式为:
where w is energy in joules(J)and q is charge in coulombs(C).The voltage uab is measured in volts(V), named in honor of the Italian physicist Alessandro Antonio Volta(l745~l827), who invented the first voltaic battery.Thus, Voltage(or potential difference)is the energy required to move a unit charge through an element, measured in volts(V).式中w是单位为焦耳的能量而q是单位为库仑的电荷。电压Uab是以伏特为单位来度量的,它是为了纪念意大利物理学家Alessandro Antonio Volta而命名的,这位意大利物理学家发明了首个伏达电池。于是电压(或电压差)等于将单位电荷在元件中移动所需的能量,它是以伏特为单位来度量的。
Fig.l-2 shows the voltage across an element(represented by a rectangular block)connected to points a and b.The plus(+)and minus(-)signs are used to define reference direction or voltage polarity.The uab can be
0 2 interpreted in two ways: ①point a is at a potential of uab volts higher than point b;②the potential at point a with respect to point b is uab.It follows logically that in general 图1-2显示了某个元件(用一个矩形框来表示)两端a、b之间的电压。正号(+)和负号(-)被用来指明参考方向或电压的极性,Uab可以通过以下两种方法来解释。1)在Uab伏特的电位中a点电位高于b点,2)a点电位相对于b点而言是Uab,通常在逻辑上遵循
uab-uba
Although current and voltage are the two basic variables in an electric circuit, they are not sufficient by themselves.For practical purposes, we need to know power and energy.To relate power and energy to voltage and current, we recall from physics that power is the time rate of expending or absorbing energy, measured in watts(W).We write this relationship as 虽然电流和电压是电路的两个基本变量,但仅有它们两个是不够的。从实际应用来说,我们需要知道功率和能量。为了把功率和能量同电压、电流联系起来,我们重温物理学中关于功率是消耗或吸收的能量的时率,它是以瓦特为单位来度量的。我们把这个关系式写成:
dw
p dtWhere p is power in watts(W), w is energy in joules(J), and t is time in seconds(s).From Eq.(1-1), Eq.(1-3), and Eq.(1-5), it follows that 式中p是以瓦特为单位的功率,w是以焦耳为单位的能量,t是以秒为单位的时间,从方程(1-1)、(1-3)和(1-5)可以推出
pui
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, on the other hand, the power has a minus sign, power is being supplied by the element.But how do we know when the power has a negative or a positive sign?
由于u和i通常是时间的函数,方程(1-6)中的功率p是个时间变量于是被称为瞬时功率,某一元件吸收或提供的功率等于元件两端电压和通过它的电流的乘积。如果这个功率的符号是正的,那么功率向元件释放或被元件吸收。另一方面,如果功率的符号是负的,那么功率是由元件提供的。但我们如何得知何时功率为正或为负?
Current direction and voltage polarity play a major role in determining the sign of power.It is therefore important that we pay attention to the relationship between current i and voltage u in Fig.1-3(a).The voltage polarity and current i direction must conform with those shown in Fig.1-3(a)in order for the power to have a positive sign.This is known as the passive sign convention.By the passive sign convention, current enters through the positive polarity of the voltage.In this case, p = ui or ui ﹥ 0 implies that the element is absorbing power.However, if p =-ui or ui ﹤ 0, as in Fig.1-3(b), the element is releasing or supplying power.在我们确定功率符号时,电流的方向和电压的极性起着主要的作用,这就是我们在分析图1-3(a)所显示的电流i和电压u的关系时特别谨慎的重要原因。为了使功率的符号为正,电压的极性和电流的方向必须与图1-3(a)所示的一致。这种情况被称为无源符号惯例,对于无源符号惯例来说,电流流进电压的正极。在这种情况下,p=ui或ui>0,表明元件是在吸收功率。而如果p=-ui或ui<0,如图1-3(b)所示时,表明元件是在释放或提供功率。
In fact, the law of conservation of energy must be obeyed in any electric circuit.For this reason, the algebraic sum of power in a circuit, at any instant of time, must be zero 事实上,在任何电路中必须遵循能量守恒定律。由于这个原因,任一电路中在任何瞬间功率的代数和必须等于零
p0This again confirms the fact that the total power supplied to the circuit must balance the total power absorbed.From Eq.(l-7), the energy absorbed or supplied by an element from time t0 to time t is 这再一次证明了提供给电路的功率必须与吸收的功率相平衡这一事实。从方程(1-7)可知,从时间t0到时间t被元件吸收或由元件提供的功率等于
t wpdtt
Section2 An electric circuit is simply an interconnection of the elements.There are two types of elements found in electric circuits: passive elements and active elements.An active element is capable of generating energy while a passive element is not.Examples of passive elements are resistors, capacitors, and inductors.The most important active elements are voltage or current sources that generally deliver power to the circuit connected to them.电路仅仅是元件之间的相互结合。我们发现电路中存在有两种元件:无源元件和有源元件。有源元件能够产生能量而无源元件却不能,无源元件有电阻、电容和电感器等。最重要的有源元件是通常向与它们相连的电路释放能量的电压和电流源。
Independent sources
An ideal independent source is an active element that provides a specified voltage or current that is completely independent of other circuit variables.An independent voltage source is a two-terminal element, such as a battery or a generator, which maintains a specified voltage between its terminals.The voltage is completely independent of the current through the element.The symbol for a voltage source having u volts across its terminals is
0 4 shown in Fig.1-4(a).The polarity is as shown,indicating that terminal a is u volts above terminal b.Thus if u > 0, then terminal a is at a higher potential than terminal b.The opposite is true, of course, if u < 0 一个理想的独立源是产生完全独立于其它电路变量的特定电压或电流的有源元件。一个独立电压源是一个二端口元件,如一个电池或一台发电机,它们在其端部维持某个特定的电压。该电压完全独立于流过元件的电流,在其端部具有u伏电压的电压源的符号如图1-4(a)所示,极性如图所示,它表明a端比b端高u伏。如果u>0,那么a端的电位高于b端,当然,如果u<0,反之亦然。In Fig.1-4(a), the voltage u may be time varying, or it may be constant, in which case we would probably label it U.Another symbol that is often used for a constant voltage source, such as a battery with U volts across its terminals, is shown in Fig.1-4(b).In the case of constant sources we shall use Fig.1-4(a)and 1-4(b)interchangeably.在图1-4(a)中,电压u可以是随时间而变化,或者可以是恒定的,在这种情况下我们可能把它标为U,对于恒定电压源我们通常使用另一种符号,例如在两端只有U伏电压的电池组,如图1-4(b)所示。在恒定源的情况下我们可以交替地使用于图1-4(a)或图1-4(b)
We might observe at this point that the polarity marks on Fig.1-4(b)are redundant since the polarity could be defined by the positions of the longer and shorter lines.我们可能已经注意到这一点,即图1-4(b)中的极性标号,是多余的因为我们可以根据长天线的位置符,确定电池极性
An independent current source is a two-terminal element through which a specified current flows.The current is completely independent of the voltage across the element.The symbol for an independent current source is shown in Fig.1-5, where i is the specified current.The direction of the current is indicated by the arrow 一个独立电流源是二端元件在两端之间特定的电流流过,该电流完全独立于元件两端的电压,一个独立电流源的符合如图1-5所示。图中i是特定电流,该电流的方向由箭头标明
Independent sources are usually meant to deliver power to the external circuit and not to absorb it.Thus if u is the voltage across the source and its current i is directed out of the positive terminal, then the source is delivering power, given by p = ui, to the external circuit.Otherwise it is absorbing power.For example, in Fig.1-6(a)the battery is delivering 24 W to the external circuit.In Fig.1-6(b)the battery is absorbing 24 W, as would be the case when it is being charged.独立源通常指的是向外电路释放功率而非吸收功率,因此如果u是电源两端的电压而电流i直接从其正端流出,那么该电源正在向对电路释放功率,由式p=ui算出。否则它就在吸收功率。例如图1-6(a)中电池正在向外电路释放功率24w,在图1-6(b)中,电池就在充电情况,吸收功率24w。Dependent sources
An ideal dependent(or controlled)source is an active element in which the source quantity is controlled by another voltage or current.Dependent sources are usually designated by diamond-shaped symbols, as shown in Fig.1-7Since the control of the dependent source is achieved by a voltage or current of some other element in the circuit, and the source can be voltage or current, it follows that there are four possible types of dependent sources, namely:(1)A voltage-controlled voltage source(VCVS).(2)A current-controlled voltage source(CCVS).(3)A voltage-controlled current source(VCCS).(4)A current-controlled current source(CCCS).Dependent sources are useful in modeling elements such as transistors, operational amplifiers and integrated circuits.一个理想的受控源是一个有源元件,它的电源量是由另外一个电压和电流所控制。
受控源通常用菱形符号表明,如图1-7所示。由于控制受控源的控制量来自于电路中其他元件的电压或电流,同时由于受控源可以是电压源或电流源。由此可以推出四种可能的受控源类型,即 电压控制电压源(VCVS)电流控制电压源(CCVS)电压控制电流源(VCCS)电流控制电流源(CCCS)
受控源在模拟诸如晶体管、运算放大器以及集成电路这些元件时是很有用的 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.Thus an ideal source could in theory supply an infinite amount of energy.It should also be noted that not only do sources supply power to a circuit, but they can absorb power from a circuit too.For a voltage source, we know the voltage but not the current supplied or drawn by it.By the same token, we know the current supplied by a current source but not the voltage across it.应该注意的是:一个理想电压源(独立或受控)可向电路提供以保证其端电压为规定值所需的任意电流,而电流源可向电路提供以保证其电流为规定值所必须的电压。还应当注意的是电源不仅向电路提供功率,他们也可从电路吸收功率。对于一个电压源来说,我们知道的是由其提供或所获得的电压而非电流,同理,我们知道电流源所提供的电流而非电流源两端的电压。