电气工程与自动化专业英语 第2章

电气工程及其自动化专业英语介绍Electric Engineering and its Automation Major IntroductionIntroduction:Electric Engineering and its Automation is a specialized field that combines electrical engineering principles with automation technologies. It focuses on the design, development, and implementation of electrical systems and automation techniques in various industries. This major equips students with a comprehensive understanding of electrical engineering principles, automation technologies, and their applications in real-world scenarios.Curriculum:The curriculum of the Electric Engineering and its Automation major is designed to provide students with a strong foundation in electrical engineering principles and hands-on experience in automation technologies. The courses offered include:1. Electrical Circuit Analysis: This course introduces students to the fundamental concepts of electrical circuits, including circuit analysis techniques, network theorems, and circuit simulation tools. Students learn to analyze and design electrical circuits using various methods.2. Electromagnetic Field Theory: This course explores the principles of electromagnetic fields and their applications in electrical engineering. Students learn about Maxwell's equations, electromagnetic wave propagation, and the behavior of electromagnetic fields in different mediums.3. Power Systems: This course focuses on the generation, transmission, and distribution of electrical power. Students learn about power system components, power generation technologies, power system protection, and control techniques.4. Control Systems: This course introduces students to the principles of control systems and their applications in automation. Topics covered include system modeling, feedback control, stability analysis, and controller design techniques.5. Programmable Logic Controllers (PLCs): This course provides students with a practical understanding of PLCs and their applications in automation. Students learn about ladder logic programming, PLC hardware, and interfacing techniques.6. Industrial Automation: This course explores the various automation technologies used in industrial settings. Students learn about sensors and actuators, industrial communication protocols, and automation system integration.Career Prospects:Graduates with a major in Electric Engineering and its Automation have a wide range of career opportunities in various industries. Some potential career paths include:1. Electrical Engineer: Graduates can work as electrical engineers, designing and developing electrical systems for power generation, transmission, and distribution. They can also work on projects related to control systems and automation.2. Automation Engineer: Graduates can pursue careers as automation engineers, designing and implementing automation systems in manufacturing, process control, and robotics industries. They can work on projects involving PLCs, industrial robots, and SCADA systems.3. Power Systems Engineer: Graduates can specialize in power systems engineering, working on projects related to power generation, transmission, and distribution. They can design and optimize power grids, analyze power system stability, and develop renewable energy systems.4. Research and Development: Graduates can work in research and development roles, exploring new technologies and innovations in the field of electrical engineering and automation. They can contribute to advancements in power systems, control systems, and automation technologies.Conclusion:The Electric Engineering and its Automation major provides students with a strong foundation in electrical engineering principles and automation technologies. With a comprehensive curriculum and hands-on experience, graduates are well-prepared for careers in various industries. Whether it is designing electrical systems, implementing automation technologies, or working on power systems projects, graduates of this major have the skills and knowledge to excel in the field of electric engineering and its automation.。

Chapter 2 Analog Electronics 模拟电子学
1. 内容简介
本章主要介绍运算放大器、差分放大器、积分器、微分
器和有源滤波器等器件的工作原理。
2.文中涉及理论知识可参考《模拟电子学》中有关内 容。
3.生词与短语
▪ 1. analog electronics
模拟电子学
▪ 2. feedback
▪ 26. differential
adj. 差动的，微分的
▪ 27. rejection
n. 抑制, 衰减
▪ 28. integrator
n. 积分器
▪ 29. differentiator
n. 微分器
▪ 30. capacitor
n. 电容器
Chapter 2 Analog Electronics
Chapter 2 Analog Electronics
[2]Feedback is a technique by which gain of the analog system can be exchanged for other desirable qualities such as wider bandwi ▪ 32. bias ▪ 33. passive filter ▪ 34. active filter ▪ 35. implement ▪ 36. magnitude ▪ 37. cascade ▪ 38. cut-off
n. 常数 n. 偏置，偏压 n. 无源滤波器 n. 有源滤波器 v. 实现 n. 大小，幅度 v. 级联 adj. 截止的
集成电路 n. 放大器 n. 元件 v. 耦合 n. 晶体管 n. 硅 v. 封装 n. 增益 n. 性能

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。

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。

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 offlow 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 conventionthat current is the net flow of positive charges. Thus, Electriccurrent is the time rate of charge, measured in amperes (A).Mathematically, the relationship among current i , charge q , andtime 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time in several ways that may be represented by different kindsof 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。

Section 1 Introduction
Fig.2-2 Components of a signal system
Section 1 Introduction
Many electrical signals derived from physical systems are obtained from devices called transducers. We have already encountered an example of an alog transducer, the thermocouple pair. It converts temperature difference (the physical variable) to a voltage (the electrical variable). Generally, a transducer is a device that converts a physical or mechanical variable to an equivalent voltage or current signal. Unlike the thermocouple example, however, most transducers require some form of electrical excitation to operate.
Section 1 Introduction
we refer implicitly to voltages or currents. However, most of the concepts we discuss can be applied directly to systems with different informationcarrying variables. Thus, the behavior of a mechanical system (in which force and velocity are the variables) or a hydraulic system (in which pressure and flow rate are the variables) can often be modeled or represented by an equivalent electrical system. An understanding of the behavior of electrical systems, therefore, provides a basis for understanding a much broader range of phenomena.