电工学原理及应用(Electrical_Engineering)经典双语详解讲义_(1)
(完整版)电气工程与自动化专业英语中文翻译
第一章 电路基本原理第一节 电流与电压u （t ）和i （t ）这两个变量是电路中最基本的概念，描述了电路中各种不同的关系。
电荷与电流电荷与电流的概念是解释一切电气现象的基础原则。
而电荷也是电路的最基本的量。
电荷是构成物质的原子的电气属性，单位是库仑（C ）。
通过基础物理学，我们了解到一切物质都是由被称为原子的基本粒子构造而成的，每个原子中都包含电子、质子和中子。
我们还知道电子上的电荷带负电，每个电子上的电量是1.60210×10-19库仑。
质子带与电子相等的正电荷。
原子上质子与电子的数目相等，使其呈中性。
我们来考虑电荷的运动。
电或电荷的独特之处就是它们可以移动，也就是说电荷可以从一个地方移动到另一个地方，从而转换成另外一种形式的能量。
当把一根导线接在电池（一种电源）的两端时，电荷受迫而运动；正电荷与负电荷分别向相反的两个方向移动。
这种电荷的移动产生了电流。
习惯上，我们把正电荷移动的方向或负电荷移动的反方向称为电流的方向，如图1-1所示。
这种说法是由美国科学家、发明家本杰明·富兰克林提出的。
即使我们知道金属导体中的电流是由于带负电荷的电子（运动）而产生的，（我们）也使用默认的习惯，将正电荷运动的方向定义为电流的方向。
因此，电流是单位时间内电荷的变化率，单位是安培（ampere ，A ）。
在数学上，电流i 、电荷q 和时间t 的关系为i=dtdq （1-1） 将等式的两边同时进行积分，则可得到电荷在时间t 和t 0之间的变化。
有q== 0t t idt （1-2）在等式（1-1）中我们给电流i 的定义表现了电流不是一个定值量，电荷随时间的变化不同，电流也与之呈不同的函数关系。
电压、电能与电功率使电子在导体中定向运动需要做功或能量转换。
功由外电动势提供，最典型的就是图1-1中的电池。
外电动势也可理解为电压或电位差。
电路中，a 、b 两点之间的电压U ab 等于从a 到b 移动单位电荷所需能量（所做的功），有U ab =dqdw （1-3） w 代表电能，单位是焦耳（J ）；q 代表电量。
电工学原理及应用(Electrical Engineering)经典双语详解讲义
Alternating Current
On the other hand, a current that varies with time, reversing direction periodically, is called alternating current, abbreviated as AC.
3Ω
4Ω 2Ω 3Ω a 6Ω
10V
Congsidering current I， N=4,B=6,L=7
N=3,B=5,L=6
1.4 Kirchhoff’s current LAW (KCL)
The net(净，总的) current a node is zero.
Ｉ= 0
entering
• Electrical Engineering Subdivisions
• • • • • • • • Communication systems Computer systems Control systems Electromagnetics Electronics Photonics Power systems Signal processing
P1 P2 P3 P4 P5 90 20 120 90 80 0
功率平衡！电路中所有元件的功率之和为 0 ！ 常用作对分析结果的检验准则。
•About Kirchhoff
古斯塔夫· 罗伯特· 基尔霍夫(Gustav Robert Kirchhoff )
——/wiki/Gustav_Kirchhoff
Box3
P3 U 3 I 3 60V ( 2)A 120W<0
U1 1
U2 2 U5
电气工程及其自动化专业英语
专业英语电路基础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differen tiate v 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the potential at point a with respect to point b is点a关于点b的电势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metal lic 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）。
电气专业英语section 1-5中英
由于节点3连接有4条支路，所以选择其作为参考点， 用所示的接地符号标明。
The voltage between node 1 and the reference node 3 is identified as u1, and u2 is defined between node 2 and the reference.
每个非参考点相对于参考点的电压既是节点电压。
It is common practice to select polarities so that the node voltages are positive relative to the reference node.
选择极性时，通常使节点电压相对于参考点为正。
理解了电路基本定律（欧姆定律和基尔霍夫定律）后
we are now prepared to apply these laws to develop two powerful techniques for circuit analysis:
我们准备应用这些定律得出两种电路分析的有效方法
nodal analysis, which is based on a systematic application of Kirchhoff's current law (KCL),
0.2u1 1.2u2 2
(1-20)
Solve the Eq.(1-19) and Eq. (1-20) to obtain the unknown node voltage u1 and u2, then any current or power in the circuit may now be found.
电工技术(英文)
Current form a schematic diagram of Figure 1.2-1
Charge regular directional movement, the formation of the conduction current.
§1-2
电流和电压的参考方向
1.2.1 电流
一段金属导体内含有大量的 带负电荷的自由电子，通常 情况下，这些自由电子在其 内部作无规则的热运动。 如果在AB段金属导体的两端 连接上电源，那么带负电荷 的自由电子就要逆电场方向 运动 电荷有规则的定向运动， 形成传导电流。
Check Your Understanding What the difference between Uab and U ?
a
I +
R U
Us
b
a
I
R U
Us +
b
-
-
U=Us+RI
U=－Us－RI；
4. 电功率 Power
Power is the time rate of expending or absorbing energy, measured in watts (W).
dq i (1.6 1019 )(1015 ) 1.6 104 A dt
U0
p 4 25,000 V 4 i 1.6 10
Assigning reference directions 电流的参考方向 To specify the current in a conductor, we need both a reference direction and numerical value, which can be positive or negative.
电气工程专业英语unit6解读
This involves the application of automation technology in the power system, such as SCADA, EMS, and DMS, to achieve real-time monitoring and control of the power system.
Article structure
VS
Unit 6涉及的词汇主要包括电气工程相关术语、工业自动化和智能制造领域的专业词汇，以及一些科技类常用词汇。
短语总结
文章中出现的短语主要包括与电气工程和工业领域相关的短语，如"power system","automation control","intelligent manufacturing"等。这些短语对于理解文章内容非常重要，需要学生重点掌握。
Electrical engineering also contributes to the progress of other fields, such as computer science, robotics, and nanotechnology. Electrical engineers design and develop the electronic components and systems that are used in these fields, making it possible for them to advance.
Circuit analysis
Circuit analysis is a fundamental skill for electrical engineers. It involves using mathematical models to analyze the behavior of electrical circuits. Circuit analysis is essential for predicting circuit performance, optimizing circuit design, and troubleshooting circuit problems.
电工学原理及应用(Electrical Engineering)经典双语详解讲义
N
–
+
内电场被加 强，少子的漂 移加强，由于 少子数量很少， 形成很小的反 向电流。
PN 结加反向电压时，PN结变宽，反向电流较小， 反向电阻较大，PN结处于截止状态。 温度越高少子的数目越多，反向电流将随温度增加。
•二极管的符号与结构Fra bibliotekuDD 外形 iD 国标符号 D 美标符号
根据PN结构造面的特点，二极管分为点接触型、面接触 型、键型、合金型、扩散型、台面型、平面型、合金扩散型、 外延型、肖特基型等。
I D2
D1承受反向电压为－6 V
3
4mA
Ex.8.8 Assume ideal diodes, find the diode states for the circuits shown in Fig. 10.17.
D1 is on;
D2 is off;
D3 is off;D4 is on.
Electrical Engineering and Electronics II
Chapter 8 Diodes
4 Course Hours
Chapter 8 Diode
8.1 Basic Diode Concepts 8.2 Load-line analysis of diode circuits 8.3 Zener-diode voltage-regulator circuits 8.4 Ideal-diode model 8.5 Piecewise-linear diode models 8.6 Rectifier circuits 8.7 Wave-shaping Circuits 8.8 Linear Small-signal Equivalent Circuits
电气工程专业英语教学内容
电气工程专业英语电路 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。
机电英语(教育部07版专业英语)Unit 6 Electrical Engineering
Paragraph 4
控制器和电阻器必须被适当地挑选
The controller and resistor must be properly chosen for the specific
为了某些特殊的应用
application.
某些特殊应用时，须挑选适当的控制器和电阻器。 某些特殊应用时，须挑选适当的控制器和电阻器。
与其他型号的交流电机相比，感应电动机因其简单、 与其他型号的交流电机相比，感应电动机因其简单、经济和耐用而更 广泛地用于工业，特别是需要高速驱动时更是如此。 广泛地用于工业，特别是需要高速驱动时更是如此。 特别是如果一个高速驱动被需要时 与其他型号的交流电机相比
Paragraph 2 If ac power is available, all drives requiring constant speed should use squirrel-cage induction or ruggedness and low cost.
Paragraph 3 Almost all constant-speed machines may be driven by ac motors because
因为鼠笼式电动机被制造
these motors are made with a variety of speed and torque characteristics.
因为鼠笼式感应电动机或同步电动机经久耐用且成本低，若有交流电源可用， 因为鼠笼式感应电动机或同步电动机经久耐用且成本低，若有交流电源可用， 所有需要恒转速驱动的装置应使用这两种电机。 所有需要恒转速驱动的装置应使用这两种电机。 应使用鼠笼式感应或者同步电动机 所有需要恒转速驱动（的装置） 所有需要恒转速驱动（的装置） 若有交流电源可用
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。
电工及电子技术知识点(英文)
<Electrical and electronic technology>Chapter One: DC Circuit and analysis methodsThe basic concept : the composition and role of the circuit ; understand and master circuit current, voltage and electromotive force , the physical meaning of electric power and energy ; understand the meaning of the voltage and electromotive force , current reference direction ; understand and master the basic circuit element resistors, inductors, capacitors V - Ante , as well as a voltage source ( including the constant voltage source ) , the current source ( including the constant current source ) of the external characteristics ; understand circuit ( power ) of the three working status and characteristics ; understand the concept of electrical equipment ( components ) ratings , and three modes of operation ; understand the concept of the potential , understanding the relationship between the potential and voltage .Basic laws and theorems : mastering Kirchhoff's current and voltage law and Ohm's law and its applicati ons , with particular emphasis on Σ I = 0 and Σ U = significance 0:00 two sets of positive and negative numbers , and Ohm's law in the sign significance. Analysis basis and method : Understanding resistance in series or parallel , hybrid solution method to master the equivalent resistance of the resistor circuit , as well as diversion, skilled application of pressure points formula ; master the method for determining the load circuit, circuit elements , power supply , control circuit power balance analysis ; master with branch current method , the principle of superposition , Thevenin theorem and power equivalent transformation methods such as analysis, calculation circuit ; grasp calculation circuit potential of each point .Chapter 2: sinusoidal AC circuitBasic concepts : understanding the three elements of a sinusoidal AC : amplitude, frequency and initial phase ; understand the concept of RMS and the phase difference ; grasp sine amount phasor notation , master volume and conversion methods sinusoidal phase between the amount ; understanding sinusoidal instantaneous power AC circuits , reactive power, apparent power concept , master active power, power factor concept ; understand the concept of impedance ; grasp complex calculation methods , master phasor diagram of the painting .Basic laws and theorems : Understand the basic laws of phasor form circuits , as well as phasor form ohm theorem.Analysis basis and method : mastering a single parameter AC circuit voltage and current phasor relationship, that the relationship between size and phase relationships ; understand impedance in series or parallel , hybrid solution method to master the equivalent impedance of the circuit , as well as diversion, the partial pressure of the formula phasor type of skilled application ; master circuit judge ( load ) nature ; master method phasor method , phasor diagram , as well as calculating the phase relationship between the size of the relationship and the simple sinusoidal circuit ; grasp active power, reactive powerand apparent power calculation methods , to improve understanding of the inductive load power factor approach.Chapter 3 : Three-phase AC circuitBasic concepts: symmetric three-phase voltage to understand the concept of understanding the concept of the phase voltage , phase current and line voltage and line current , to understand the concept of three-phase symmetrical and asymmetrical loads understand the concept of a three-phase symmetry of the circuit, the negative voltage and current , grasp the three-phase load connection method , understand three-phase four-wire power supply circuit in the middle of the action , understanding the three-phase circuit active power , apparent power and reactive power concept of .Analysis basis and method : mastering phase symmetrical load Y connection and △connection , the line voltage and phase voltage and line current and phase current magnitude and phase relationships, and lines, calculate the phase voltages and currents ; master the three-phase unbalanced load when the Y connection and there is midline , calculate the line current and neutral current ; grasp three-phase circuit active power, apparent power and reactive power calculations.Chapter 4: Common semiconductor devicesBasic concepts : understanding the formation and unidirectional conductive semiconductor basic knowledge and PN junction ; grasp diode voltage characteristics and unidirectional conductivity characteristics, to understand the main parameters and significance diodes , master diode circuit symbol ; understanding silicon regulator the structure and main parameters of the regulator control circuit symbols ; understand the basic structure of the transistor and the current amplification, and the understanding of the characteristic curve of the transistor in the enlarged area , and the cutoff characteristics of the saturation region , the main parameters of the transistor understood master NPN type and PNP transistor circuit symbol .Analysis basis and method : the diode forward voltage withstand (positive bias ) diode conduction withstand reverse voltage ( reverse bias ) diode cutoff . When subjected to reverse breakdown voltage regulator tube current limiting resistor under the action of the voltage across the regulator stable and unchanging ( applying a reverse voltage is greater than the stable voltage , whether the person , the regulator reverse cutoff ) ; If the regulator withstand the forward voltage regulator turns on ( with the diode same ) . Ideal diode and the ideal regulator : for idealized treatment that forward voltage is zero , the reverse cutoff infinite resistance .Triode work in the enlarged area : emitter junction is forward biased voltage withstand ; collector junction withstand reverse bias voltage ;Transistors in saturation : the emitter junction is forward biased withstand voltage ; collector junction bear positive bias voltage ;Transistor in cutoff region : emitter junction withstand reverse bias voltage ; collector junction under reverse bias voltage ;Difficulties: including diodes and regulator circuit analysis , transistor three working state judgment and the judgment of the transistor type , polarity and materials. Chapter 5: Basic amplifier circuitBasic concepts : understanding the role of the composition of various common-emitter amplifier circuit part of the pole , understanding zoom works, understanding the static and dynamic amplification circuit , understand the role of quiescent operating point ; understanding amplifying circuit AC parameters: input resistance , output resistance and the magnification of the significance.Analysis basis and method : direct access and communication pathways master painting ; grasp static analysis methods: estimation method and graphical method ; grasp the DC load line painting ; grasp the dynamic analysis methods: micro- computing small signal ac equivalent circuit parameters becomes law , graphic method for qualitative analysis will ; stable quiescent operating point to understand the processes and principles ; understanding emitter 's basic characteristics and uses.Key elements: a fixed bias circuit , voltage divider type amplifier circuit quiescent operating point of the three circuits emitter and slightly changed equivalent circuit. Will draw DC path and exchange accessChapter VI : Integrated Operational AmplifierBasic concepts : operational amplifier integrated graphics symbols and pins purposes ; negative feedback amplifier circuit and depth of negative feedback ; integrated operational amplifier ideal conditions and basic performance ; analysis of three basic op amp circuit ; integrated operational amplifier basic application Circuit ( ie : addition, subtraction , integral and differential circuits ) ; consisting operational amplifier , the main parameters ; proportional arithmetic circuit , integrated operational amplifier applications ; model ideal conditions for integrated operational amplifier.Chapter 7: DC Power SupplyBasic concepts : Understanding DC power supply and the role of four areas : transformer , rectifier , filter and regulator ; understanding of single-phase half- wave bridge rectifier principle ; understand the principle of the filter circuit , voltage regulator circuit. Understand the integrated voltage regulator applications.Analysis basis and method : Mastering half-wave , bridge rectifier circuit calculating the average load voltage , current, and the calculation of the average current rectifier diode and the maximum reverse voltage. Will draw half-wave , wave bridge rectifier , and the rectifier output load current, voltage polarity.Chapter 8: combinational logic circuitBasic concepts : logical relations , and logic , or logic, non-logical , there is acorresponding basic gates , and doors, or doors and NAND gate . Combination gate circuit , a NAND gate , NOR gate , NOR gate , three-state gate , with the XOR gates and OR gates and the like. Should have a gate symbols, logic and logical expressions. Logical formula logic algebra is important to simplify the formula logical relationship should memorize and master simple formulaic approach .Analysis basis and method : combinational logic analysis and design is the focus of this chapter , in particular, is a combination of logical analysis , master steps.Difficulty: logical expression simplification and combinational logic circuit design Chapter IX : sequential logic circuitsBasic concepts : basic RS flip-flop , synchronous RS flip-flop logic symbols and logic functions , JK flip-flop and D flip-flop , is to learn the focus of this chapter. After the bistable , CP pulse leading edge trigger and the trigger edge , the difference between the symbols . Registers and counters should have analytical methods and points.Analytical basis and Methods: trigger -based , to find CP relationship between each trigger to determine the frontier or back porch , painting the output waveform , identify the key points of transition until the next pulse occurs .Difficulty: analysis of synchronous counter。
(完整版)电气工程及其自动化专业英语第五章课文翻译
Most people can formulate a mental picture of a computer, but computers do so many things and come in such a variety of shapes and sizes that it might seem difficult to distill their common characteristics into an all-purpose definition. At its core, a computer is a device that accepts input， processes data， stores data, and produces output, all according to a series of stored instructions.Computer input is whatever is put into a computer system. Input can be supplied by a person， by the environment, or by another computer。
Examples of the kinds of input that a computer can accept include the words and symbols in a document, numbers for a calculation, pictures， temperatures from a thermostat，audio signals from a microphone， and instructions from a computer program. An input device, such as a keyboard or mouse， gathers input and transforms it into a series of electronic signals for the computer.In the context of computing, data refers to the symbols that represent facts, objects， and ideas. Computers manipulate data in many ways， and we call this manipulation processing。
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。
电工学原理及应用(Electrical Engineering)经典双语详解讲义 (2)
The Summary of Series/Parallel Equivalents
Although they are very important concepts, series/parallel equivalents and the current/voltage division principles are not sufficient to solve all circuits. Series/Parallel Equivalents are useful to solve simple circuits (is composed of single source and multiple resistances can be reduced by series/parallel equivalents ) Complex circuits are typically composed of multiple sources or multiple resistances can not be reduced by series/parallel equivalents.
R1 v i2 itotal R2 R1 R2
•Application of the Current-Division and Voltage-Division Principle
Example 2.4 Find the values of is and i3.
i3 is * R2 / ( R2 R3 ) 1.25 / 3 0.417 A
•Homework
P2.2 P2.7 P2.10
2.4 Branch current analysis
•The first and most straightforward complex network analysis technique is called the Branch Current Method. •Let the branch currents be unknowns, write equations describing their relationships to each other through Kirchhoff's and Ohm's Laws. •Give rules to write b independent equations to find currents of b branches. •For the network with b branches and n nodes, use KCL to write n-1 current equations and use KVL to write b(n-1) independent voltage equations.
电气工程及其自动化专业英语通用课件
Training should also include hands-on experience with practical experiences and projects to develop practical skills
The ultimate goal of the current is to prepare students for entry level positions in the Electrical Engineering and Automation field
General English Courseware for Electrical Engineer
目录
Overview of Electrical Engineering and AutomationBasic knowledge of electrical engineeringAutomation Technology and ApplicationsProfessional English Vocabulary and ExpressionAnalysis of practical application cases
introduce the basic principles of semiconductors and their properties, including diodes, transistors, and integrated circuits
Digital and analog electronics
02
Job opportunities are expected to be substantial for those with skills in Electrical Engineering and Automation, specifically in areas such as renewable energy, smart grids, and electric vehicles
电类专业英语课文翻译
第一课定期保养定期保养，简单说是一种有组织的维护计划，用于保持设施或设备处于可能的最好状态，以满足生产的需要。
当然，是否处于可能的最好状态是由组织确定的。
当保养计划定出来后，并不是所有的机械都是在同一个时间实施保养的。
有些设备如果缺乏调整，将会损失很多价值或损失设备的灵敏度，因此，必须首先制定一个完善的周密的保养计划。
保养计划涉及四个领域：润滑，检查，清洗，零件调整和修理。
说到保养，首先是有关润滑的问题，包括润滑剂的型号，使用的润滑工具或系统，润滑计划的综合有效性，润滑步骤以及实施润滑的人员。
检查对所有设备的正常维护是至关重要的，正如人们应定期作体格检查一样，印刷机械也应定期检查。
人和工厂都是相似的。
婴儿需要经常检查，年青人和成年人要经常检查，中年人和老年人更需要检查。
与此相同，新机械需要保养，直到设备转入正常工作为止。
在机械开始磨损前给与较少的关注，会导致更频繁的检查。
如下因素有助于制定印刷设备的检查步骤：使用年限，工作条件，设备价值，服务严紧性，安全要求，连续工作时间，设备的损坏敏感程度，设备的磨损敏感程度，对缺乏调整的敏感程度以及操作者个人的工作经验等。
清洗对保养来说是很有必要的，因为它允许人们对适当润滑，磨损因数，合理的调整以及出现故障进行检查。
以重视的态度对印刷设备做恰当操作同样是重要的。
一台清洁干净的机器可给人们能生产出高质量的印刷品的感觉。
确实，如果人们对这些设备高度重视的话，印刷成品将更令人满意。
如果要使可接受的印刷品成为最终成品，零件的调整与修理必须是基本的定期操作。
有些设备要定期更换某些零件，确定零件的有效寿命，然后在磨损之前更换它。
如果事先知道一个零件的寿命，这是一个极为成功的方法，但是，在印刷厂中，只有极少数零件是有一个预期寿命的，这样，检查计划便有助于确定应何时更换零件。
如果机器的调整能确保印刷成品一致的印刷质量，同时降低成本，那么，磨损因数将会降低。
一个定期维护计划只有在印刷质量水平能维持住，并能延长机器的有效寿命时才是有效的。
专业英语电气工程P2U5教学课件
02
P2U5课程大纲
P2U5课程简介
课程名称：专业英语电气 工程P2U5
课程性质：专业必修/选修
适用对象：电气工程专业 本科生及研究生
学分：3学分
P2U5课程目标
01 掌握电气工程领域专业英语词汇和表达方 式
02 提高英文技术文献阅读、翻译和写作能力
03
了解国际电气工程领域最新发展动态和技 术趋势
案例分析内容
分析案例的背景、技术方案、实施过程和效 果评估。
案例讨论与总结
组织学生进行案例讨论，总结案例的优点和 不足，提出改进建议。
实际项目应用与解决方案
项目需求分析
对实际电气工程项目进行分析，明确项目的 需求和目标。
解决方案设计
根据项目需求，设计相应的解决方案，包括 技术方案、实施方案和保障措施等。
技术发展的推动
技术进步使得专业英语电气工程成为研究和开发的前 沿领域。
跨学科的桥梁
专业英语电气工程是连接不同学科领域的桥梁，促进 跨学科的合作与发展。
专业英语电气工程的基本概念
电路理论
研究电流、电压、电阻等基本电气量的关系和变化规律。
电子技术
研究电子器件的工作原理、特性及应用，涉及放大、振荡、整流 等基本电路。
根据文献重要性和相关性，采用不同的阅读方式。
笔记整理
摘录关键信息，整理思路，记录疑问点。
3
归纳总结
对文献内容进行概括和提炼，形成自己的理解。
文献总结与汇报
内容总结
01
概括文献主题、研究方法、主要结论等。
汇报准备
02
制作PPT、准备讲稿、梳理逻辑结构。
汇报技巧
03
注意语言表达、时间控制、互动交流等。
电气专业英语课文翻译
An electric circuit (or network) is an interconnection of physical electrical device. The purpose of electric circuits is to distribute and convert energy into some other forms. Accordingly, the basic circuit components are an energy source (or sources), an energy converter (or converters) and conductors connecting them.电路（或者网络）是物理电气设备的一种互相连接。
电路的目的是为了将能量分配和转换到另外一种形式中。
因此，基本的电路元件包括电源、电能转换器以及连接它们的导体。
An energy source (a primary or secondary cell, a generator and the like) converts chemical, mechanical, thermal or some other forms of energy into electric energy. An energy converter, also called load (such as a lamp, heating appliance or electric motor), converts electric energy into light, heat, mechanical work and so on.电源（原生电池或者再生电池、发电机等类似装备）将化学能量、机械能量，热能或者其他形式的能量转换成电能。
电能转换器（也称为负载，如灯泡、电热器或者电动机）将电能转换成光、热、机械运动等等。
(完整版)电工学原理及应用(Electrical_Engineering)经典双语详解讲义_(1)
• Control systems gather information with sensors and use
electrical energy to control a physical process.
• Electromagnetics is the study and application of electric
electrical signals.
• Why Study Electrical Engi the Fundamentals of Engineering (FE) Examination •To have a broad knowledge and you can lead design projects in your own field •To be able to operate and maintain electrical systems •To communicate with electrical engineering consultants
and magnetic fields.
• Electronics is the study and application of materials, devices
and circuits used in amplifying and switching electrical signals.
• Photonics is an exciting new field of science and engineering
Electrical Engineering and Electronics II
Electrical Engineering
电工学原理及应用(Electrical Engineering)经典双语详解讲义 (4)
Supplementary: Feedback
See feedback.ppt
12.4 Imperfections in the Linear Range of Operation
Input and output impedances
Ideal: Ri=∞， Ro=0； Real IC : RiBJT=1MΩ，RiFET=1012Ω，Ro=1~100Ω
R
R
v f v f v
o
R AR B
A
B
Excise 12.2
Answer (a) i1=i2=1mA, io=-10mA, ix=-11mA, Vo=-10V Answer (b) i1=i2=i3=5mA, i4=10mA, Vo=-15V
Excise 12.3
Answer: 4v1-2v2
Gain-Bandwidth product- several MHz
12.5 Nonlinear Limitations
Output Voltage Swing(输出电压幅值限制) Vo<=Umax
Output Current Limits(输出电流限制) Io<=Imax
Slew-Rate Limitation(转换速率限制)
•In a negative feedback system, the ideal opamp output voltage attains the value needed to force the differential input voltage and input current to zero. We call this fact the summingpoint constraint.
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Power systems convert energy to and from electrical form. Signal processing is concerned with information-bearing
electrical signals.
• Why Study Electrical Engineering?
•
• • • • •
Control systems
and magnetic fields.
gather information with sensors and use electrical energy to control a physical process.
Electromagnetics is the study and application of electric Electronics is the study and application of materials, devices
Alternating Current
On the other hand, a current that varies with time, reversing direction periodically, is called alternating current, abbreviated as AC.
q(t ) i (t )dt q(t0 )
t0
t
Example 1.1 Determining Current Given Charge
q(t )( C )
2
0
Suppose that charge versus time is given by
q( t ) 0
t0
100t
q( t ) 2 2e
•国标符号
i
uR u uL uC R L C
+
VCC RB
a + E R0 b
IB UBE
I + U d
IC RC +
c
R
_
I B UCE
_
+ _
VCC
• Electrical Current
• Electrical current is the time rate of flow of electrical charge through a conductor or circuit element.
.
Sinusoidal current
三角波
方波
•Reference Directions
i1=-2A
i2=2A
i3=-1A
Actual Direction
•Double-Subscript Notation for Currents
Example: if iab 1A , then iba 1A
Final Score = 20% experiment performance + 30% exercise performance + 50% exam score
Electrical Engineering and Electronics II
Electrical Engineering and Electronics II
Reasons:
•To pass the Fundamentals of Engineering (FE) Examination •To have a broad knowledge and you can lead design projects in your own field •To be able to operate and maintain electrical systems •To communicate with electrical engineering consultants
and circuits used in amplifying and switching electrical signals.
Photonics is an exciting new field of science and engineering
that promises to replace conventional computing.
The electrical current flowing through the element in the reference direction is given by
dq(t ) i (t ) dt
Fig.1.4 Current is the time rate of charge flow through a cross section of conductor or circuit element
•Voltages
positive polarity positive charge
positive charge negative polarity
•Voltages’ reference polarity
Another two ways to indicate the reference polarity of a voltage: double subscripts on the voltage variable and an arrow
•Voltages
Voltages are assigned polarities that indicate the direction of energy flow. If positive charge moves from the positive polarity through the element toward the negative polarity, the element absorbs energy that appears as heat, mechanical energy, stored chemical energy, or as some other form. On the other hand, if positive charge moves from the negative polarity toward the positive polarity, the element supplies energy.
-
+
Vab=-5V
Vba=-Vab
1.3 Power And Energy
Consider the circuit element shown in Figure 1.14. Because the current i is the rate of flow of charge and the voltage v is a measure of the energy transferred per unit of charge, the product of the current and the voltage is the rate of energy transfer. In other words, the product of current and voltage is power.
1.1 Overview of Electrical Engineering
Electrical systems have two main objectives: • To gather(采集), store(存储), process (处理) , transport(转换), and present(显示） information • To distribute and convert energy between various forms
Chapter 1 Introduction
4 Course Hours
1. Introduction
1.1 Overview of Electrical Engineering 1.2 Circuits, Currents, and Voltages 1.3 Power and Energy 1.4 Kirchhoff's Current Law 1.5 Kirchhoff's Voltage Law 1.6 Introduction to Circuit Elements 1.7 Introduction to Circuits
Electrical Engineering and Electronics II
Electrical Engineering
Principles and Applications
Hale Waihona Puke Chen Qiangsdnjchq@
Electrical Engineering and Electronics II
t
400
t0
dq(t ) Solution : i (t ) dt 0 t0 200e 100t
i (t ) 200e 100t
t 0
200
t0 0
t ( ms)
Direct Current
When a current’s direction is constant with time, we say that we have direct current, abbreviated as DC.
•Voltages
The voltage associated with a circuit element is the energy transferred per unit of charge that flows through the element. The units of voltage are volts (V), which are equivalent to joules per coulomb (J/C).