Electrical and Electronic Principles Assignment1

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电器工作原理的英语作文

电器工作原理的英语作文Title: Principles of Electrical Appliances。

Electrical appliances have become an integral part of modern life, serving various functions ranging from cooking to communication. Understanding the principles behind their operation helps us appreciate their significance andutilize them effectively. In this essay, we will delve into the fundamental principles governing the functioning of electrical appliances.Firstly, it's essential to comprehend the basics of electricity. Electricity is the flow of electric charge. This flow occurs when there is a potential difference, commonly referred to as voltage, between two points in a circuit. The unit of electric charge is the Coulomb (C), and the rate of flow of electric charge is the current, measured in Amperes (A). 。

The operation of electrical appliances primarily relieson converting electrical energy into other forms of energy, such as heat, light, or mechanical work. Let's explore some common types of electrical appliances and their underlying principles:1. Heating Appliances: Devices like electric heatersand stoves operate on the principle of electrical resistance. When an electric current passes through a resistive material, it encounters resistance, which results in the conversion of electrical energy into heat energy. This heat is then utilized for heating purposes.2. Lighting Appliances: Incandescent bulbs and fluorescent lamps are examples of lighting appliances. Inan incandescent bulb, electricity passes through a filament, heating it to a high temperature until it emits visible light. Fluorescent lamps operate by passing an electric current through a gas, which emits ultraviolet radiation upon excitation. This radiation, in turn, stimulates a phosphor coating on the inside of the lamp, producingvisible light.3. Motorized Appliances: Devices such as fans, blenders, and washing machines incorporate electric motors. Electric motors operate on the principle of electromagnetism, where the interaction between magnetic fields and electriccurrents generates mechanical motion. This motion is harnessed to perform various tasks, such as spinning a fan blade or agitating water in a washing machine.4. Communication Appliances: Smartphones, computers,and televisions are examples of communication appliancesthat rely on electronic circuits. These circuits manipulate electric currents to process information, display images, and transmit signals. The principles governing their operation include semiconductors, digital logic, and signal processing.In addition to these principles, safety considerations are paramount when dealing with electrical appliances. Proper insulation, grounding, and circuit protection mechanisms are essential to prevent electrical hazards such as shocks, fires, and equipment damage.Moreover, advancements in technology have led to the development of energy-efficient appliances that minimize electricity consumption while maintaining performance. Techniques such as power management, energy recovery, and optimization algorithms contribute to enhancing the efficiency of electrical appliances.In conclusion, electrical appliances operate based on fundamental principles of electricity and electromagnetism. By understanding these principles, we can appreciate the versatility and functionality of modern electrical devices. Moreover, adherence to safety guidelines and the adoption of energy-efficient technologies ensure both effective operation and responsible use of electrical appliances in our daily lives.。

工作原理英文

工作原理英文The working principle of a machine or a system refers to the fundamental concepts and mechanisms that govern its operation. Understanding the working principle of a particular device is essential for engineers, technicians, and users to effectively utilize and maintain it. In this document, we will explore the general principles behind various types of machines and systems.First and foremost, the working principle of a machine is often based on the laws of physics and engineering. For example, the operation of a simple lever is governed by the principle of mechanical advantage, which allows a small force to be applied over a longer distance to produce a larger force over a shorter distance. This principle is essential in the design of many mechanical systems, such as car jacks and construction equipment.In addition to mechanical principles, many machines and systems also rely on electrical or electronic principles for their operation. For instance, the working principle of an electric motor is based on the interaction between magnetic fields and electric currents, which produces rotational motion. Understanding these principles is crucial for the design and maintenance of electrical and electronic systems, including generators, transformers, and control systems.Furthermore, the working principle of complex systems, such as thermal power plants or chemical processing plants, often involves a combination of mechanical, electrical, and chemical principles. For example, the operation of a steam turbine in a power plant relies on the principles of thermodynamics, fluid mechanics, and mechanical engineering. Similarly, the operation of a chemical reactor in a processing plant involves principles of chemistry, heat transfer, and fluid flow.Moreover, the working principle of modern technological systems, such as computer networks and communication systems, is based on principles of information theory, signal processing, and data transmission. These systems rely on the efficient processing and transmission of digital information to enable communication and data exchange between users and devices.In conclusion, the working principle of machines and systems is a fundamental aspect of their design, operation, and maintenance. Engineers and technicians must have a thorough understanding of the underlying principles to ensure the efficient and reliable performance of these devices. By applying the principles of physics, engineering, and technology, we can continue to develop innovative machines and systems that drive progress and improve our quality of life.。

电化学方法与原理英文

电化学方法与原理英文Electrochemical Methods and PrinciplesElectrochemistry is a fundamental branch of chemistry that deals with the relationship between electrical and chemical phenomena. It encompasses the study of various processes, such as the generation of electricity from chemical reactions, the use of electrical energy to drive chemical transformations, and the behavior of materials in electrochemical systems. Electrochemical methods have a wide range of applications, from energy production and storage to corrosion protection and analytical techniques.One of the core principles of electrochemistry is the understanding of oxidation and reduction reactions, also known as redox reactions. In these reactions, electrons are transferred between chemical species, resulting in changes in their oxidation states. The driving force behind these electron transfers is the difference in the ability of the participating species to attract and release electrons, known as their reduction potential. By harnessing and controlling these redox processes, electrochemists can design and optimize various electrochemical devices and processes.Electrochemical cells are the fundamental building blocks of electrochemical systems. These cells consist of two electrodes, an anode and a cathode, immersed in an electrolyte solution. The anode is where oxidation occurs, and the cathode is where reduction takes place. The electrolyte provides the necessary ionic conduction between the two electrodes, allowing the flow of ions and the completion of the overall electrochemical reaction.One of the most widely recognized applications of electrochemistry is energy conversion and storage. Electrochemical cells, such as batteries and fuel cells, convert the chemical energy stored in fuels or reactants directly into electrical energy. Batteries, for example, use the principle of redox reactions to generate a flow of electrons, which can then be used to power various electronic devices. Fuel cells, on the other hand, generate electricity by combining fuel (such as hydrogen) and an oxidant (such as oxygen) in an electrochemical reaction.In addition to energy applications, electrochemical methods are also used in a variety of analytical techniques. Electroanalytical methods, such as potentiometry, voltammetry, and electrochemical sensors, utilize the principles of electrochemistry to detect and quantify the presence of specific chemical species in a sample. These techniques are widely used in fields like environmental monitoring, healthcare, and chemical analysis.Corrosion is another area where electrochemistry plays a crucial role. Corrosion is an electrochemical process that involves the deterioration of materials, usually metals, due to their interaction with the surrounding environment. Understanding the electrochemical principles underlying corrosion enables the development of effective strategies for corrosion prevention and mitigation, such as the use of protective coatings, cathodic protection, and the selection of corrosion-resistant materials.Electrochemistry also finds applications in the synthesis and processing of materials. Electrochemical techniques, such as electroplating and electrodeposition, are used to deposit thin filmsor coatings of various materials onto a substrate. These processes are employed in the production of electronic components, decorative finishes, and protective coatings.The field of electrochemistry is constantly evolving, with new developments and applications emerging as our understanding of the underlying principles expands. Researchers continue to explore innovative electrochemical technologies, such as energy storage systems, fuel cells, and electrochemical sensors, to address pressing global challenges related to energy, the environment, and healthcare.In conclusion, electrochemical methods and principles arefundamental to a wide range of scientific and technological fields. From energy conversion and storage to analytical techniques and material processing, the principles of electrochemistry underpin numerous important processes that shape our modern society. As we continue to push the boundaries of scientific knowledge, the importance of electrochemistry will only grow, making it a crucial area of study for scientists and engineers alike.。

机械工程专业英语词汇

机械工程专业英语词汇摘要：本文介绍了机械工程专业的一些主要课程，以及每个课程所涉及的一些专业英语词汇。

本文旨在帮助机械工程专业的学习者和从业者掌握和运用相关的专业术语，提高专业水平和沟通能力。

一、工程图学工程图学是一门基础性的课程，主要讲述了尺规绘图和CAD绘图的基本原理和方法，以及各种视图、投影、标注、符号等的规范和应用。

工程图学是机械设计和制造的重要工具，是表达和交流机械产品信息的有效方式。

以下是工程图学课程所涉及的一些专业英语词汇：中文英文工程图学engineering drawing尺规绘图geometric drawingCAD绘图computer-aided drawing视图view投影projection标注dimensioning符号symbol规范standard应用application机械产品mechanical product信息information表达expression交流communication工具tool方式method主视图front view侧视图side view俯视图top view剖视图sectional view局部放大视图enlarged detail view轴测图axonometric projection等轴测投影法isometric projection method等角投影法dimetric projection method等面积投影法trimetric projection method透视图perspective view单点透视法one-point perspective method双点透视法two-point perspective method三点透视法three-point perspective method平行投影法parallel projection method二、理论力学理论力学是一门研究物体在力作用下的运动规律和平衡条件的科学，是机械工程的基础理论之一。

电工与电子技术英文版

电工与电子技术英文版Electricity and electronics are an essential part of modern life, enabling us to communicate, travel and access information in ways that were unimaginable just a few decades ago. As the use of electricity and electronics has grown, so too has the need for professionals with a broad knowledge of these fields. Electrical and electronic technicians play an important role in the research, design and manufacture of advanced electrical systems and components, as well as their maintenance and repair.Electrical and electronic technicians are experts in a wide variety of technologies, from simple circuits to complex microprocessors. They use sophisticated test equipment to measure current and voltage and diagnose faults, and also work with hand tools to assemble, install and maintain a variety of components and systems. They are also involved in the design of new systems, often using computer-aided design (CAD) software to create models or diagrams.To be successful in this field, one needs a strong technical background and excellent problem-solving skills. Knowledge of circuit theory and electronics is necessary, as is familiarity with basic mathematics, physics and chemistry. Technicians need to be well-versed in safety protocols and must possess the ability to follow instructions accurately. Attention to detail is also critical, as is a good understanding of relevant industry codes and standards.In addition to technical skills, electrical and electronic technicians must also possess good communicationand interpersonal skills. They must be able to work independently, as well as within a team, and be able to work in a fast-paced environment. The ability to troubleshoot faulty equipment and quickly identify solutions is also essential.The demand for electrical and electronic technicians is expected to remain strong in the years to come. This is due in part to the ever-increasing reliance on technology, as well as the need to repair and maintain existing equipment. With the right qualifications and experience, the job prospects are good and the rewards can be significant.。

香港城市大学的工业工程专业介绍introduction of industrial engineering of HK city university

a fundamental understanding of Industrial Engineering and Engineering Management concepts and techniques and their application in designing and managing manufacturing, engineering and other services
- IEEE Transactions on Engineering Management, USA
IE and EM are related but they do have distinctive characteristics and differences in emphasis. They have a common fundamental theoretical basis and both rely on an understanding of technology and its integration within a business environment. Both also emphasize adopting systems approaches and problem solving and decisionmaking techniques to design and implement effective and productive manufacturing, engineering and general services processes that combine people and technology. Similarly, both are concerned with the efficient control and management of these systems over their full life cycle once they are in operation. Finally, clearly both disciplines are very strongly multi-disciplinary and capitalize on the synergy between different bodies of knowledge to maximize benefits.

电气专业英语课后练习翻译

PART1U1T1、In addition to the various power transformers, two special-purpose transformers are used with electric machinery and power systems. The first of these special transformers is a device specially designed to sample a high voltage and produce a low secondary voltage directly proportional to it. Such a transformer is a potential transformer. A power transformer also produces a secondary voltage directly proportional to that the potential transformer is designed to handle only a very small current. The second type of special transformer is a device designed to provide a secondary current much smaller than but directly proportional to its primary current. This device is called a current transformer.除了各种电源变压器、两个专用变压器使用电动机械和电力系统。

第一个特殊变压器是一个高电压设备专门设计的样品和生产较低的二次电压成正比。

这样一个变压器电压互感器。

电力变压器也产生二次电压成正比的电压互感器的设计目的是处理只有一个很小的电流。

电子与电气工程Electrical and Electronic Engineering

2012TIMES英国大学专业排名—电子与电气工程Electrical and Electronic Engineering排名院校StudentsatisfactionResearchqualityEntrystandardsGraduateprospectsOverallScore1 剑桥大学84 5.4 567 92 1002 萨里大学84 4 448 89 90.13 南安普顿大学85 3.5 435 93 89.64 帝国理工学院78 3.5 498 87 87.4 4 谢菲尔德大学89 3 376 92 87.46 伦敦大学学院79 3.4 439 88 85.67 巴斯大学79 3.4 442 85 84.88 纽卡斯尔大学83 2.8 366 97 84.49 贝尔法斯特女王大学83 3.1 375 86 83.310 拉夫堡大学85 2.8 364 87 83.211 曼彻斯特大学82 3.7 395 76 83.112 埃塞克斯大学87 3.1 n/a 74 82.513 约克大学90 2.4 362 79 82.114 布里斯托大学78 2.6 423 88 81.815 诺丁汉大学79 2.6 371 91 81.216 格拉斯哥大学82 3.2 369 76 8117 爱丁堡大学83 2.7 399 78 80.818 肯特大学92 2.2 288 82 80.419 利兹大学71 4.2 403 72 79.620 斯特拉思克莱德大学80 2.5 400 76 7921 埃克塞特大学80 2.4 416 75 78.622 苏塞克斯大学81 2.5 n/a 78 77.623 伯明翰大学79 2.5 382 76 77.124 威尔士班戈大学n/a 4 201 81 76.825 兰卡斯特大学77 2.4 388 77 76.426 卡迪夫大学79 2.2 357 78 76.327 雷丁大学79 1.6 360 81 74.828 阿斯顿大学84 1.8 342 71 74.629 赫尔大学89 1.4 292 n/a 74.230 阿伯丁大学73 2.9 n/a 74 73.331 赫瑞瓦特大学77 2.4 305 77 73.132 索尔福德大学78 2.9 264 68 7233 利物浦大学72 2.7 382 64 71.8 33 史塔福郡大学72 1.9 n/a 85 71.8 35 布鲁内尔大学80 1.9 314 63 70.336 伦敦大学玛丽皇后学院76 2.5 298 62 69.637 伦敦大学国王学院77 1.6 334 64 6938 朴茨茅斯大学85 1.2 218 73 68.839 利物浦约翰摩尔大学69 3.1 262 68 68.340 罗伯特戈登大学77 n/a 347 80 68.241 斯旺西大学78 1.6 294 64 67.942 赫特福德郡大学79 2.5 195 63 67.242 哈德斯菲尔德大学76 1.5 291 66 67.244 普利茅斯大学79 1 280 68 67.145 考文垂大学74 1.9 283 67 66.946 West of England 69 2.4 268 69 66.447 诺森比亚大学72 1.9 252 70 65.948 德蒙特福德大学76 1.5 276 62 65.149 伦敦城市大学70 2.1 297 58 64.450 伦敦南岸大学71 2.2 n/a 52 6251 谢菲尔德哈莱姆大学72 1.5 245 56 6152 CentralLancs 77 1 241 52 60.953 布拉德福德大学78 0.4 262 55 60.854 曼彻斯特城市大学69 1.2 263 60 60.354 Soton Solent 76 n/a 252 64 60.3 54 威斯敏斯特大学77 0.6 248 55 60.357 邓迪大学77 n/a 262 53 58.358 德比大学69 n/a 250 68 57.559 阿尔斯特大学67 n/a 242 68 56.460 格林威治大学75 n/a 189 59 56.261 伯明翰城市大学70 n/a 249 58 55.862 格拉斯哥喀里多尼亚大学72 n/a 254 53 55.663 提兹塞德大学78 n/a 261 39 55.364 波尔顿大学63 n/a 241 52 50.765 格拉摩根大学53 1.8 180 37 46.5。

光有源器件和无源器件的英文

IntroductionElectronic devices, the backbone of modern technology, rely on a diverse array of components that function in concert to process, transmit, and store information. These components can be broadly classified into two distinct categories: active and passive electronic devices. Each category exhibits unique characteristics, functionalities, and roles within electronic circuits, contributing to the overall performance and efficiency of various systems. This comprehensive analysis delves into the fundamental principles, operational mechanisms, applications, and comparative perspectives of active and passive electronic components, providing a thorough understanding of their significance in the realm of electronics.Active Electronic ComponentsActive electronic components are the driving force behind any circuit, as they possess the ability to control, amplify, or generate electrical signals without relying solely on the input signal. They require an external source of energy, typically in the form of a DC power supply, to perform their designated functions. The primary distinguishing feature of active components is their capacity to introduce gain, which refers to the amplification of an input signal's voltage, current, or power. The most common examples of active components include transistors (bipolar junction transistors, field-effect transistors), integrated circuits (ICs), diodes, and vacuum tubes.1. **Operational Principles**: Active components manipulate electrical signals through the control of electron flow. For instance, transistors employ the principles of charge carrier injection and modulation to amplify or switch signals. Diodes, on the other hand, utilize the property of asymmetric conductivity to allow current flow predominantly in one direction. Integrated circuits incorporate multiple active and passive components on a single chip, enabling complex signal processing and control functions.2. **Applications**: Active components find widespread use in virtually allswitches, oscillators, and logic gates in digital circuits. ICs are integral to microprocessors, memory chips, and analog-to-digital converters, enabling computing, communication, and control systems. Diodes are employed in rectifiers, voltage regulators, and signal demodulation circuits. Vacuum tubes, although less prevalent today, still have niche applications in high-power amplifiers, radio transmitters, and specialized audio equipment.3. **Advantages**: Active components offer several advantages, such as signal amplification, voltage and current regulation, non-linear signal processing, and the ability to create complex logical operations. They enable the creation of highly efficient and miniaturized electronic systems, thanks to advancements in IC technology.Passive Electronic ComponentsPassive electronic components, in contrast, do not require a source of external energy for their operation. They simply respond to the applied electrical signals, storing, dissipating, or redirecting energy without introducing gain. The primary passive components include resistors, capacitors, inductors, transformers, and various types of connectors and cables.1. **Operational Principles**: Passive components rely on fundamental electrical properties to perform their functions. Resistors impede current flow based on Ohm's Law, converting electrical energy into heat. Capacitors store electrical energy in an electric field, releasing it when required, while inductors store energy in a magnetic field and oppose changes in current. Transformers utilize electromagnetic induction to transfer energy between circuits with different voltage levels, while connectors and cables facilitate the transmission of signals without significant attenuation or distortion.2. **Applications**: Passive components are ubiquitous in electronic circuits, serving essential roles in filtering, impedance matching, signal coupling, power distribution, and timing. Resistors are used for voltage division, current limiting, and pull-up/pull-down configurations. Capacitorssmoothing power supplies, and resonant circuits. Transformers are critical in power supply isolation, stepping up or down voltages, and signal coupling across different impedances. Connectors and cables ensure reliable signal transmission in various systems, from consumer electronics to large-scale industrial installations.3. **Advantages**: Passive components offer simplicity, reliability, and cost-effectiveness. They do not generate noise or consume power, making them ideal for signal conditioning and energy management tasks. Moreover, their non-reactive nature simplifies circuit analysis and design.Comparative PerspectivesWhile both active and passive components are indispensable in electronic circuits, their roles and characteristics differ significantly:1. **Energy Consumption**: Active components consume power to perform their functions, whereas passive components do not. This distinction influences power budgeting, thermal management, and battery life considerations in electronic designs.2. **Signal Amplification**: Active components can amplify signals, whereas passive components cannot. This capability is crucial for signal processing, long-distance transmission, and overcoming inherent signal losses in electronic systems.3. **Complexity**: Active components, particularly ICs, can integrate vast numbers of active and passive elements on a single chip, enabling highly complex and sophisticated circuits. Passive components, while essential, generally contribute to the circuit's overall simplicity and ease of maintenance.4. **Noise Generation**: Active components, due to their internal processes, can introduce noise into a circuit, which may need to be mitigated through careful design and filtering. Passive components, being inherently non-amplifying, tend to produce less noise.Conclusionblocks of modern electronics, each playing a unique and indispensable role in shaping the functionality and performance of electronic systems. While active components, with their signal amplification and energy-consuming nature, drive the core processing and control functions, passive components provide essential support through energy storage, signal conditioning, and power distribution. Understanding the operational principles, applications, and comparative perspectives of these components is vital for engineers and designers seeking to create efficient, reliable, and high-performance electronic devices and systems.。

工程电路分析英文版第七版教学设计 (3)

Engineering Circuit Analysis, 7th Edition - TeachingDesignIntroductionEngineering Circuit Analysis is a fundamental course in electrical and electronic engineering curricula. The course provides students with the knowledge and skills required to analyze and design circuits commonly found in electrical and electronic systems. The course covers a range of topics, including basic circuit laws and theorems, circuit analysis techniques, and circuit design principles.This teaching design focuses on the 7th edition of EngineeringCircuit Analysis by William H. Hayt Jr. The book covers the concepts and principles of circuit analysis in a clear and concise way, making it an excellent resource for educators and students.Course ObjectivesThe objectives of this course are to:•Understand the basic concepts and principles of circuit analysis•Analyze simple circuits using Ohm’s law, Kirchhoff’s laws, and circuit theorems•Analyze complex circuits using network theorems, nodal analysis, and mesh analysis•Understand the behavior of circuits with reactive elements, such as capacitors and inductors•Analyze circuits with operational amplifiers and digital circuits•Apply circuit analysis techniques to practical problems in electrical and electronic engineeringCourse OutlineThe course will cover the following topics:1.Basic Concepts and Laws–Voltage, Current, and Resistance–Ohm’s Law–Kirchhoff’s Laws–Power and Energy2.Circuit Analysis Techniques–Series Circuits–Parallel Circuits–Series-Parallel Circuits–Voltage and Current Division–Thevenin’s and Norton’s Theorems–Maximum Power Transfer3.Circuit Analysis Methods–Nodal Analysis–Mesh Analysis–Superposition–Source Transformation–Delta-Wye Transformation4.Reactive Elements–Capacitors•Capacitance and Charge•Energy Storage•Series and Parallel Capacitors –Inductors•Inductance and Flux•Energy Storage•Series and Parallel Inductors 5.AC Circuits–Sinusoidal Waveforms–Phasors–Impedance and Admittance–AC Circuit Analysis–Resonance6.Operational Amplifiers–Ideal Op-Amp–Inverting and Non-inverting Amplifiers–Summing and Difference Amplifiers–Integrators and Differentiators7.Digital Circuits–Boolean Algebra–Logic Gates–Combinational Logic–Sequential LogicTeaching MethodologyThe course will be taught using a combination of lectures, tutorials, and hands-on exercises. The lectures will provide the theoretical background for each topic, while the tutorials will provide practical examples and problem-solving exercises. The hands-on exercises will be conducted in a laboratory setting, allowing students to apply their knowledge in a practical setting.The course will also involve group assignments and projects,allowing students to work collaboratively on practical problems in electrical and electronics engineering. The assignments and projectswill involve the use of software tools, such as Simulink and Multisim,to simulate and analyze circuits.AssessmentThe course assessment will consist of the following components:1.Mid-term Examination (25%)2.Group Assignments (25%)boratory Assignments (25%)4.Final Examination (25%)ConclusionThis teaching design provides an overview of the course objectives, outline, teaching methodology, and assessment for Engineering Circuit Analysis, 7th Edition. The course is designed to provide students with the necessary knowledge and skills to analyze and design circuits commonly found in electrical and electronic systems. The course willprovide students with practical experience in using software tools to simulate and analyze circuits and will involve group assignments and projects to foster collaborative problem-solving skills.。

电气英语证书考试(PEC)-电力系统常用英语词汇

电气英语证书考试（PEC)-电力系统常用英语词汇(coaxial）cable （同轴)电缆ac motor 交流环电动机AC transmission system 交流输电系统active filter 有源滤波器Active power 有功功率aging 老化air-gap flux 气隙磁通air-gap line 气隙磁化线alloy 合金alternating current 交流电ammeter 电流表amplidyne 微场扩流发电机amplitude modulation (AM）调幅Amplitude Modulation（AM 调幅analytical 解析的anode (cathode）阳极(阴极)arc discharge 电弧放电Arc reignition 电弧重燃Arc suppression coil 消弧线圈arc-extinguishing chamber 灭弧室armature circuit 电枢电路Armature 电枢Armature 电枢asynchronous machine 异步电机attachment coefficient 附着系数attenuate 衰减attenuation factor 衰减系数Automatic control 自动控制Automatic meter reading 自动抄表Automatic oscillograph 自动录波仪automatic Voltage regulator（A VR）自动电压调整器Autotransformer 自耦变压器Autotransformer 自藕变压器baghouse 集尘室bandwidth 带宽Bare conductor 裸导线binary 二进制Blackout 断电、停电block diagram 方框图Boiler 锅炉boost 增压boost—buck 升压去磁breakaway force 起步阻力breakdown （电）击穿breakdown torque 极限转矩bronze 青铜Brush 电刷bubble breakdown 气泡击穿buck 补偿bus bar 母线Bus tie breaker 母联断路器bushing tap grounding wire 套管末屏接地线bushing 套管Bushing 套管Line trap 线路限波器calibrate 校准Capacitor bank 电容器组Carbon brush 炭刷carrier 载波cascade transformer 串级变压器cast-aluminum rotor 铸铝转子cathode ray oscilloscope 阴极射线示波器cavity 空穴，腔charging(damping) resistor 充电（阻尼)电阻chopper circuit 斩波电路circuit breaker CB 断路器circuit components 电路元件circuit parameters 电路参数coaxial 共轴的，同轴的coil winding 线圈绕组Combustion turbine 燃气轮机Commutator 换向器complex impedance 复数阻抗composite insulation 组合绝缘Composite insulator 合成绝缘子compounded 复励conductor 导体conductor 导线Converter （inverter）换流器（逆变器) Copper loss 铜损corona 电晕Counter emf 反电势coupling capacitor 结合电容coupling capacitor 耦合电容Creep distance 爬电距离critical breakdown voltage 临界击穿电压crusher 碎煤机current transformer CT 电流互感器dc generator 直流发电机dc motor 直流电动机de machine 直流电机dead tank oil circuit breaker 多油断路器decimal 十进制Deenergize 断电Demagnetization 退磁,去磁demodulator 解调器detection impedance 检测阻抗dielectric constant 介质常数dielectric loss 介质损耗Dielectric 电介质，绝缘体Digital signal processing 数字信号处理direct axis transient time constant 直轴瞬变时间常数direct current 直流电direct—current 直流Discharge 放电disconnector 隔离开关Dispatcher 调度员Distribution automation system 配电网自动化系统Distribution dispatch center 配电调度中心Distribution system 配电系统divider ratio 分压器分压比Domestic load 民用电Drum 汽包，炉筒dynamic response 动态响应dynamo 直流发电机e。

欧姆定律知识点总汇

欧姆定律知识点总汇Ohm's Law, named after German physicist Georg Simon Ohm, is one of the fundamental principles in the field of electrical engineering. 欧姆定律是电气工程领域的基本原理之一，得名于德国物理学家乔治·西蒙·欧姆。

This law states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points, and inversely proportional to the resistance of the conductor. 这一定律规定，通过两点之间的导体的电流与这两点之间的电压成正比，与导体的电阻成反比。

In other words, Ohm's Law can be expressed mathematically as I =V/R, where I represents the current in amperes, V represents the voltage in volts, and R represents the resistance in ohms. 换句话说，欧姆定律可以用数学公式I = V/R来表示，其中I代表电流（安培），V代表电压（伏特），R代表电阻（欧姆）。

Understanding Ohm's Law is essential for designing, analyzing, and troubleshooting electrical circuits. 理解欧姆定律对于设计、分析和故障排除电路至关重要。

电子电路设计基础英文版课程设计 (2)

Electronic Circuit Design Fundamentals - CourseDesign in EnglishIntroductionElectronic circuit design is an essential aspect of the electrical and electronic engineering field. It deals with the study andapplication of electronic components, their functionalities, and their interactions with each other in a circuit. The application of electronic circuit design is widespread, ranging from household appliances to complex systems such as rplanes and satellites. Thus, it’s essential to have a deep understanding of electronic circuit design principles to apply it to real-world problems.This course is designed to provide a comprehensive understanding of electronic circuit design fundamentals. The course will be conducted in English, catering to students who want to enhance their knowledge and skills in the field of electronic circuit design.Course OutlineModule 1: Introduction to Electronic Circuit DesignThis module will introduce the students to the fundamentalprinciples of electronic circuit design. The module will cover the following topics:•Introduction to electronic components such as resistors, capacitors, inductors, and transistors•Basic circuit laws, including Kirchhoff’s laws and Ohm’s law•Circuit analysis techniques such as nodal analysis and mesh analysis•Introductory concepts of circuit simulation software Module 2: AmplifiersThis module will focus on amplifiers, one of the most essential components of electronic circuit design. The module will cover the following topics:•Introduction to amplifiers•Different amplifier configurations such as common emitter, common base, and common collector•Amplifier parameters such as gn, frequency response, and stability analysis•Operational amplifiers and their applications Module 3: FiltersThis module will cover the principles and applications of filters. The module will cover the following topics:•Introduction to filters•Types of filters such as low-pass, high-pass, and band-pass filters•Filter design techniques such as Butterworth, Chebyshev, Bessel filter•Applications of filters in signal processingModule 4: Digital Logic DesignThis module will introduce the students to digital logic design principles. The module will cover the following topics:•Introduction to digital logic design•Boolean algebra and logic gates•Combinational logic circuits such as adders and subtractors•Sequential logic circuits such as flip-flops and registers Course DeliveryThe course will be delivered in English through a combination of lectures, tutorials, and laboratory sessions. Lectures will be conducted to provide the theoretical concepts and principles. Tutorials will be conducted to clarify any doubts that the students might have. Laboratory sessions will allow the students to apply the concepts and principles in real-world situations.Students will also be required to complete assignments and assessments throughout the course to evaluate their understanding of the course content.ConclusionThe electronic circuit design fundamentals course in English will provide the students with a comprehensive understanding of theprinciples and applications of electronic circuit design. Upon completion of the course, students will have a deep understanding of electronic circuit design and will be able to apply it to real-world problems.。

拉-扎-维

第一个给我以艺术的眼睛看工程的人--------拉扎维我眼中的拉扎维1）他怎么找到我的最早听说此人是在上大四做器件项目的时候，一直听师兄说有三本模拟集成电路方面的圣经，其中之一就是拉扎维先生的《CMOS模拟集成电路设计》，算是第一映象吧！2）我对书的印象本是不打算太快买全几本圣经的，一是资金问题，一是想留点悬念，毕竟研一在学习另一本圣经（格雷的《模拟集成电路分析与设计》）。

但是班上有一个为了促进大家学习的读书会，使用的教材正是拉扎维先生的书，不得已，只能让好戏提前上演了。

好的东西总能在你看见它的第一眼就打动你！通常是这样的，这一次也不例外。

实在爱不释手，在扉页上写下了我那天在南方周末上看到的一句广告词，“如果骏马不能追上太阳，我们就把太阳放到马背上”，不是吗，我们有高山仰止的心态，也应该有站在巨人肩上的信心与雄心。

其实书没怎么看过，但书中的一句话打动了我，“工程师的直觉，数学家的严谨，艺术家的创造力”。

我觉得这不是拉扎维先生的客套，而是他作为大师的体会，不是吗？如果你把所从事的事业作为艺术，何愁大事不济！前言是美的，何况其后的高潮！3）我找到的拉扎维From the web: /faculty/bios/razavi.htmAnd :/~razavi/a) His photo : a handsome man with bright eyesb) His department and university : EE of UCLA (University of California, Los Angeles). (one of the top universities in analog IC field in the world! )c) His email: razavi@d) His Biography: excellent experience , yes ?Behzad Razavi received the BSEE degree from Sharif University of Technology in 1985 (maybe forty to forty-five now) and the MSEE and PhDEE degrees from Stanford University(there lies my dream) in 1988 and 1992, respectively. He was with AT&T Bell Laboratories （the paradise of an engineer in the word）and Hewlett-Packard Laboratories (my dream ,also) until 1996. Since 1996, he has been Associate Professor and subsequently Professor of electrical engineering at University of California, Los Angeles. His current research includes wireless transceivers, frequency synthesizers, phase-locking and clock recovery for high-speed data communications, and data converters.Professor Razavi was an Adjunct Professor at Princeton University from 1992 to 1994, and at Stanford University in 1995. He served on the Technical Program Committees of the International Solid-State Circuits Conference (ISSCC) from 1993 to 2002 and VLSI Circuits Symposium from 1998 to 2002. He has also served as Guest Editor and Associate Editor of the IEEE Journal of Solid-State Circuits, IEEE Transactions on Circuits and Systems, and International Journal of High Speed Electronics. Professor Razavi was also recognized as one of the top 10 authors in the 50-year history of ISSCC. He is an IEEE Distinguished Lecturer, a Fellow of IEEE, and the author of Principles of Data Conversion System Design (IEEE Press, 1995), RF Microelectronics (Prentice Hall, 1998) (translated in Chinese and Japanese), Design of Analog CMOS Integrated Circuits (McGraw-Hill, 2001) (translated in Chinese and Japanese), and Design of Integrated Circuits for Optical Communications (McGraw-Hill, 2003). He was the editor of Monolithic Phase-Locked Loops and Clock Recovery Circuits (IEEE Press, 1996), and Phase-Locking in High-Performance Systems (IEEE Press, 2003).e) His Research Interests (focusing on the word “Interests” , “interests make perfect”)Prof. Razavi's current research includes wireless transceivers, frequency synthesizers, phase-locking and clock recovery for high-speed data communications, and data converters. For more details about his work, please visit Prof. Razavi's website at /~razavi.f)His Books (门门懂，洋洋精！)Phase-Locking in High Performance Systems (B. Rezavi, editor). IEEE Press, 2003Design of Integrated Circuits for Optical Communication Systems, B. Razavi. McGraw-Hill, 2003.High-Speed CMOS Circuits for Optical Receivers, J. Savoj and B. Razavi. Boston: Kluwer Publishers, 2001Design of Analog CMOS Integrated Circuits, Behzad Razavi. Boston: McGraw-Hill, c2000. Series: McGraw-Hill Series in Electrical and Computer Engineering.RF Microelectronics, Behzad Razavi. Prentice Hall, c1998. Series: Prentice-Hall Communications Engineering & Emerging Technologies Series.Monolithic Phase-locked Loops and Clock Recovery Circuits: Theory and design (B. Razavi, editor). New York: IEEE Press, c1996.Principles of Data Conversion System Design, Behzad Razavi. New York: IEEE Press, c1995. g) His Awards (wow! The salt of the analog IC field !)2002 ISSCC Top Ten AuthorProfessor Razavi was named among the top ten authors in the 50-year history of the InternationalSolid-State Circuits Conference, the most prestigious design conference in the semiconductor industry. This is the first industry-wide recognition that UCLA's Integrated Circuits & Systems research is among the top three such programs worldwide.2001 ISSCC 2001 Jack Kilby Outstanding Student Paper AwardProf. Razavi and his student, Lawrence Der, are the recipients of this award for their paper entitled "A 2GHz CMOS Image-Reject Receiver with Sign-Sign LMS Calibration", (ISSCC 2001 IEEE International Solid-State Circuits Conference. Digest of Technical Papers, San Francisco, CA, USA, 5-7 Feb. 2001.)1998 Best Paper Award, Custom Integrated Circuits ConferenceProf. Razavi was the first recipient of this newly-instituted award for his paper, "CMOS Technology Characterization for Analog and RF Design", which is featured in a special CICC'98 issue of the prestigious IEEE Journal of Solid State Circuits (vol. 34, no. 3, pp. 268-76, March 1999).1997 ISSCC Outstanding Evening Panel AwardProf. Razavi received his second Outstanding Evening Panel Award from the International Solid State Circuits Conference (ISSCC) for the panel he organized in 1997, entitled "RF Designers Are From Mars, Analog Designers Are From Venus". This award is particularly prestigious as ISSCC is one of the flagship IEEE conferences, where the world's leading innovations in analog circuits, communication circuits, microprocessors, memory technologies, and systems integration are presented.1995 ISSCC Outstanding Evening Panel AwardProf. Razavi received the Outstanding Evening Panel Award of the 1995 International Solid State Circuits Conference (ISSCC) for the panel he organized, entitled "Analog BiCMOS: Luxury or Necessity?". ISSCC is one of the flagship IEEE conferences, where the world's leading innovations in analog circuits, communication circuits, microprocessors, memory technologies, and systems integration are presented.1994 Best Paper Award, European Solid State Circuits ConferenceProf. Razavi received the Best Paper Award for his paper entitled "Design of a 100-MHz 10-mW 3-V Sample-and-Hold Amplifier in Digital Bipolar Technology", which was also featured in the Journal of Solid State Circuits, vol. 30, no. 7, pp. 724-30, July 1995.1994 Beatrice Winner Award for Editorial ExcellenceThe Beatrice Winner Award is given in recognition of editorial quality (conciseness, clarity, organization, efficacy of tables, accuracy and adequacy of references, etc.) of material accepted for publication in the ISSCC Digest of Technical Papers. In 1994 Prof. Razavi received this prize for his paper, "A 6-GHz 60-mW BiCMOS Phase-Locked Loop with 2-V Supply" (Proceedings of IEEE International Solid-State Circuits Conference - ISSCC '94, San Francisco, CA, USA, 16-18 Feb. 1994, pp.114-15.).1994 TRW Teaching Awardg)His Courses (国外的教授也不轻松啊！Five courses in total)Professor Razavi is Instructor-in-Charge ofEE 100: Electrical and Electronic CircuitsEE110L: Circuit Measurements LaboratoryEE 115B: Analog Electronic Circuits II (with Prof. Abidi)EE 215A: Analog Integrated Circuit DesignEE 215C: Analysis and Design of RF Circuits and SystemsMy feeling:Enjoy Razavi! Enjoy his book! Enjoy analog IC! Enjoy the life!。

电气工程专业英语词汇

(coaxial) cable (同轴)电缆AC transmission system交流输电系统active filter 有源滤波器active load ( P Load )有功负载active loss 有功损耗active power 有功功率alternating current (AC) 交流电ammeter电流表amplitude modulation (AM) 调幅angle stability 功角稳定anode (cathode) 阳极(阴极) arc discharge 电弧放电arc suppression coil 消弧线圈arc-extinguishing chamber 灭弧室armature 电枢，(继电器的)衔铁asynchronous machine 异步电机automatic control 自动控制automatic meter reading ( AMR )自动抄表automatic oscillograph 自动录波仪autotransformer 自耦变压器binary 二进制blackout 断电、停电block diagram 框图boiler 锅炉breakdown (电)击穿Breaker 断路器brush 电刷brushless DC motor 无刷直流电机bus bar 母线Bus tie breaker 母联断路器(母联断路器，母联开关) calibrate 校准capacitor bank 电容器组conductor 导线converter (inverter) 换流器，整流器(逆变器) copper loss 铜损corona 电晕coupling capacitor 耦合电容current transformer CT 电流互感器damping 阻尼decimal 十进制dielectric 电介质,绝缘体dielectric constant 介质常数dielectric loss 介质损耗direct current (DC )直流电discharge 放电disconnector 隔离开关dispatcher 调度员distribution automation system 配电网自动化 (DA )系统distribution dispatch center 配电调度中心double-circuit lines on the same tower 双回同杆并架double-column transformer 双绕组变压器earth(ground) wire 接地线earthing switch 接地开关eddy current 涡流electric field 电场electrical circuit 电路electrical machine control 电机控制electrical machinery 电机electromagnetic field 电磁场excitation 励磁exciting winding 励磁绕组excitor 励磁器extra-high voltage (EHV) 超高压fast decoupled power-flow method 快速解耦潮流算法fault clearing time 故障切除时间feeder 馈电线FFT (fast Fourier transform) 快速傅立叶变换fixed series capacitor compensation 固定串联电容补偿flashover 闪络Flexible AC transmission system (FACTS) 灵活交流输电系统Fossil-fired power plant 火电厂frequency modulation (FM) 调频frequency-domain 频域fuse 保险丝，熔丝gas insulated substation ( GIS)气体绝缘变电站generator terminal 机端generator tripping 切机generator 发电机Graduation dissertation 毕业设计Graduation practice 毕业实习grounding capacitance voltage divider 对地电容分压器Grounding 接地harmonic 谐波Hexadecimal 十六进制high voltage shunt reactor 高压并联电抗器high voltage 高压high-voltage apparatus 高压电器high-voltage engineering 高电压工程hydro power station 水力发电站Hydro-generator 水轮发电机integrated circuit (IC) 集成电路IEC (international Electrotechnical Commission) 国际电工(技术)委员会IEE (Institution of Electrical Engineers) 电气工程师学会(英)IEEE (Institute of Electrical and Electronic Engineers)电气与电子工程师学会(美) impedance 阻抗impulse current 冲击电流independent pole operation 分相操作induction 感应inductive (capacitive) 电感的(电容的) installed capacity 装机容量instrument transformer 互感器insulation coordination 绝缘配合insulation 绝缘insulator 绝缘子inverter station 换流站iron core 铁芯iron loss 铁损ISO (international standardization organization) 国际标准化组织isolator 刀闸(隔离开关)kinetic(potential) energy 动(势)能LAN (local area network) 局域网leakage flux 漏磁通LED (light emitting diode) 发光二极管light(boiling)-water reactor 轻(沸)水反应堆lightning arrester 避雷器lightning overvoltage 雷电过电压load shedding 甩负荷loop system 环网系统loss of synchronization 失去同步low voltage 低压lower limit 下限machinery practice 金工实习magnetic field 磁场magnetizing current 励磁电流main and transfer busbar 单母线带旁路malfunction 失灵margin 裕度，边界metal oxide arrester ( MOA )金属氧化物避雷器middle voltage 中压motor 电动机nameplate 铭牌Negative sequence impedance 负序阻抗Neutral point 中性点no-load current 空载电流no-load loss 空载损耗nuclear power station 核电站numerical 数字的octal 八进制oil-filled power cable 充油电力电缆one machine - infinity bus system 单机无穷大系统operation amplifier 运算放大器operation mechanism 操动机构oscilloscope 示波器overhead line 架空线overvoltage 过电压partial discharge 局部放电passive device 无源器件peak-load 峰荷Permanent-magnet Synchronism Motor 永磁同步电机phase displacement (shift) 相移phase lead(lag) 相位超前(滞后) phase shifter 移相器phase-to-phase voltage 线电压positive sequence impedance 正序阻抗potential transformer PT 电压互感器power angle 功角power capacitor 电力电容power electronics 电力电子power factor 功率因数Power Generation Technology 发电技术power line carrier (PLC) 电力线载波(器) / 可编程逻辑控制器power grid 电网power plant 电厂Power System Planning 电力系统规划power transfer 能量输送power transformer 电力变压器power transmission system 输电系统prime mover 原动机productive practice 生产实习protective relaying( relaying protection ) 继电保护pumped storage power station 抽水蓄能电站radio interference 无线干扰rated 额定的ratio 变比reactance (impedance) 电抗(阻抗) reactive current 无功电流reactive load 无功负载reactive loss 无功损耗reactive power compensation 无功补偿reactive power 无功功率reactor 电抗器reclosing 重合闸recovery voltage 恢复电压rectifier 整流器reference value 参考值regulation 调节reinforced excitation 强行励磁relay 继电器reserve capacity 备用容量resistance 电阻resistor 电阻器right-of-way 线路走廊root mean square (rms) 均方根值rotor 转子routing testing 常规试验rpm (revolution per minute) 转/分series (shunt) compensation 串(并)联补偿shield wire 避雷线short-circuit ratio 短路比shunt capacitor 并联电容器shunt reactor 并联电抗器simulation analysis 仿真分析single (dual, ring) bus 单(双，环形)母线skin effect 集肤效应slip ring 滑环slope 斜率Static state 静态Static var( Voltage Ampere Reactive)compensation (SVC) 静止无功补偿Stator (rotor) 定(转)子Steam turbine 汽轮机steel-reinforced aluminum 钢芯铝绞线step up (down) transformer 升(降)压变压器substation 变电站sulphur hexafluoride breaker SF6 断路器supervisory control and data acquisition (SCADA) 监控与数据采集surface breakdown 表面击穿surge impedance 波阻抗swing 摇摆switch station 开关站synchronization 同步synchronous condenser 同步调相机tap 分接头taped transformer 多级变压器three phase fault 三相故障three-column transformer ( ThrClnTrans ) 三绕组变压器time-domain 时域time-of-use tariff 分时电价transfer function 传递函数transfer switching 倒闸操作transient stability 暂态稳定transmission line 传输线Trip circuit 跳闸电路trip coil 跳闸线圈turn (turn ratio) 匝(匝比，变比) two-port network 二端口网络ultra-high voltage (UHV) 特高压underground cable 地下电缆vacuum circuit breaker 真空断路器variable transformer 调压变压器voltage grade 电压等级voltage stability 电压稳定wave front(tail) 波头(尾) winding 绕组withstand test 耐压试验withstand voltage 耐受电压zero sequence current 零序电流zinc oxide 氧化锌(金属氧化物) 专业课程名称电磁场概论Introduction to Electro-Magnetic Field 电机控制技术Control Technique of Electrical Machinery 电机学Electrical Machinery (Theory ) 电力电子技术基础Fundamentals of Power Electronics Technology 电力电子课程设计Power electronics course design 电力经济Electric power system economics 电力通信系统及调度自动化Power System Communication and Dispatching Automatic 电力系统潮流计算机分析Computer Analysis of Power Flow 电力系统分析Electric power system analysis 电力系统继电保护Electric power system relaying protection电力系统稳态分析Steady-State Analysis of Power System电力系统远动技术electric power system remote protocol电力系统暂态分析Transient Analysis of Power System电力系统自动控制Electric power system automatic control电力系统自动装置原理The Principle of Electric Power System Automatic Equipment 电路原理Principles of electric circuits 电能质量控制electric power quality (PQ) control 电气工程基础Fundamentals of Electrical Engineering电子技术基础(模拟) (数字) fundamentals of electronic (analog) (digital)高电压工程High voltage engineering 计算机继电保护Microcomputer-Based Relaying Protection计算机通信与网络Computer Communication and Network可编程控制器原理及应用Principles of PLC (Programmable logic Controller) And Application 人工智能基础Fundamentals of Artificial Intelligence ( AI ) 数字信号处理Digital Signal Processing (DSP) 微机原理与接口Principle of Microcomputer and Interface 现代电力系统管理Modern Power System Management信号与系统Signal and System 专业外语Professional English 自动控制理论Automatic Control Theory。

电工电子专业英语实用版

Ohm's Law
The relationship between voltage, current, and resistance in a circuit, V=IR
Resistance
The option to the flow of current in a circuit, measured in Ohms
Reading and translation of circuit diagrams
Circuit diagram reading: Understand the constituent elements of a circuit diagram, such as resistors, capacitors, inductors, diodes, transistors and other electronic components, as well as symbols such as power supply, grounding, input and output ports. Be able to accurately identify the connection relationships of various components in the circuit diagram and understand the working principle of the circuit.
Th é venin's Theorem
A method to simplify a complex voltage source into a single voltage in series with a resistance
Norton's Theorem

Electrical and Electronic Principles6电力电子课业

Pingdingshan Industrial College ofTechnologyBTEC HND in Electrical/Electronic Engineering Unit 5: Electrical and Electronic PrinciplesAssignmentOutcomes and Assessment CriteriaScenario:∙You are working in an company,You should complete the following work:Task 1:i) Calculate equivalent resistance using conversion between star and deltanetworks for the circuit shown in Fig. 1.ii) Use the mesh analysis to find the current flowing in the 5Ωresistor for the circuit shown in Fig.2.(1a) (1b)ΩΩ15V1Fig. 1 Fig. 2EtcTask 2:A 100kVA,4000V/200V,50Hz single-phase transformer has 100 secondary turns. Determine (a)the primary and secondary current,(b)the number of primary turns.1(c) EtcTask 3:A resistance4Ωand inductance 298 mH in series with a 50Fμcapacitor,is connected to a tVtu314sin2220)(=supply.Calculate (a) the equivalent impedance of circuit，(b) the phase difference between the supply voltage and current，(c) the apparent power shown in Fig. 3(1d)298mH50FμFig.3EtcGeneral Notes to students:·Complete the cover sheet and sign the statement of authenticity.·Take great care that if you use other people’s work or ideas in your assignment, you properly reference them in your text and any bibliography. (If you are caught plagiarising, you could have your grade reduced to zero, or at worst, you could be excluded from the course)Added Notes:·The deadline for submitting assignment is 7/11/2011, 4 PM at Teaching Office of 0201. Return date for marked work: 14/11/2011·Limit the body of the assessment to around 1000 words.Answer Task 1:Task 2: Task 3:。

Edexcel Level 3 BTEC Nationals in Engineering - Un

NIT 18ATHEMATICS FOR ECHNICIANS Unit 18: Mathematics for TechniciansNQF Level 3: BTEC NationalGuided learning hours: 60Unit abstractOne of the main responsibilities of engineers is to solve problems quickly and effectively. This unit will enable learners to solve mathematical, scientific and associated engineering problems at technician level. It will also act as a basis for progression to study other units both within the qualification such as Unit 28: Further Mathematics for Technicians and at BTEC Higher National level.This unit enables learners to build on knowledge gained at GCSE or BTEC First Diploma level and use it in a more practical context for their chosen discipline. The first learning outcome will develop learners’ knowledge and understanding of algebraic methods, from a look at the use of indices in engineering to the use of the algebraic formula for solving quadratic equations. Learning outcome 2 involves the introduction of the radian as another method of angle measurement, the shape of the trigonometric ratios and the use of standard formulae to solve surface areas and volumes of regular solids. Learning outcome 3 requires learners to be able to represent statistical data in a variety of ways and calculate the mean, median and mode. Finally, learning outcome 4 is intended as a basic introduction to the arithmetic of elementary calculus.This unit acts as an essential basis for successful completion of many of the other units within the qualification.Learning outcomesOn completion of this unit a learner should:1 Know how to use algebraic methods2 Be able to use trigonometric methods and standard formula to determine areasand volumes3 Be able to use statistical methods to display data4 Know how to use elementary calculus techniques.1NIT 18 ATHEMATICS FOR ECHNICIANS2Unit content1 Know how to use algebraic methodsIndices and logarithms : laws of indices (a mx a n= a m+n, n m n ma aa −=, (a m )n = a mn ),laws of logarithms (log A + log B = log AB , log A n = n log A , log A - log B = log BA)eg common logarithms (base 10), natural logarithms (base e), exponential growth and decayLinear equations and straight line graphs : linear equations eg y = mx + c ; straight line graph (coordinates on a pair of labelled Cartesian axes, positive or negative gradient, intercept, plot of a straight line); experimental data eg Ohm’s law, pair of simultaneous linear equations in two unknownsFactorisation and quadratics : multiply expressions in brackets by a number, symbol or by another expression in a bracket; by extraction of a common factor eg ax + ay , a (x + 2) + b (x +2); by grouping eg ax — ay + bx — by ; quadraticexpressions eg a 2 + 2ab + b 2; roots of an equation eg quadratic equations with real roots by factorisation, and by the use of formula2 Be able to use trigonometric methods and standard formula to determineareas and volumesCircular measure : radian; degree measure to radians and vice versa; angular rotations (multiples of π radians); problems involving areas and angles measured in radians; length of arc of a circle (s = r θ ); area of a sector (A = ½ r 2θ) Triangular measurement : functions (sine, cosine and tangent); sine/cosine wave over one complete cycle; graph of tanA as A varies from 0° and 360° (tanA = sin A/cosA); values of the trigonometric ratios for angles between 0° and 360°; periodic properties of the trigonometric functions; the sine and cosine rule; practical problems eg calculation of the phasor sum of two alternating currents, resolution of forces for a vector diagramMensuration : standard formulae to solve surface areas and volumes of regular solids eg volume of a cylinder = π r 2 h , total surface area of a cylinder= 2π rh + π r 2, volume of sphere = 34π r 3, surface area of a sphere = 4 πr 2,volume of a cone =31π r 2 h , curved surface area of cone = π r x slant height 3 Be able to use statistical methods to display dataData handling : data represented by statistical diagrams eg bar charts, pie charts, frequency distributions, class boundaries and class width, frequency table;variables (discrete and continuous); histogram (continuous and discrete variants); cumulative frequency curvesNIT 18 ATHEMATICS FOR ECHNICIANS3Statistical measurement : arithmetic mean; median; mode; discrete and grouped data4 Know how to use elementary calculus techniquesDifferentiation : differential coefficient; gradient of a curve y = f(x); rate ofchange; Leibniz notation (dxdy); differentiation of simple polynomial functions, exponential functions and sinusoidal functions; problems involving evaluation eg gradient at a pointIntegration : integration as reverse of differentiating basic rules for simplepolynomial functions, exponential functions and sinusoidal functions; indefinite integrals; constant of integration; definite integrals; limits; evaluation of simple polynomial functions; area under a curve eg y = x(x – 3), y = x 2 + x + 4U N I T 18: M A T H E M A T I C S F O R T E C H N I C I A N S4E d e x c e l L e v e l 3 B T E C N a t i o n a l s i n E n g i n e e r i n g – I s s u e 1 – M a y 2007 © E d e x c e l L i m i t e d 2007G r a d i n g g r i dI n o r d e r t o p a s s t h i s u n i t , t h e e v i d e n c e t h a t t h e l e a r n e r p r e s e n t s f o r a s s e s s m e n t n e e d s t o d e m o n s t r a t e t h a t t h e y c a n m e e t a l l o f t h e l e a r n i n g o u t c o m e s f o r t h e u n i t . T h e c r i t e r i a f o r a p a s s g r a d e d e s c r i b e t h e l e v e l o f a c h i e v e m e n t r e q u i r e d t o p a s s t h i s u n i t .G r a d i n g c r i t e r i aT o a c h i e v e a p a s s g r a d e t h e e v i d e n c e m u s t s h o w t h a t t h e l e a r n e r i s a b l e t o :T o a c h i e v e a m e r i t g r a d e t h e e v i d e n c e m u s t s h o w t h a t , i n a d d i t i o n t o t h e p a s s c r i t e r i a , t h e l e a r n e r i s a b l e t o :T o a c h i e v e a d i s t i n c t i o n g r a d e t h e e v i d e n c e m u s t s h o w t h a t , i n a d d i t i o n t o t h e p a s s a n d m e r i t c r i t e r i a , t h e l e a r n e r i s a b l e t o :P 1m a n i p u l a t e a n d s i m p l i f y t h r e e a l g e b r a i c e x p r e s s i o n s u s i n g t h e l a w s o f i n d i c e s a n d t w o u s i n g t h e l a w s o f l o g a r i t h m sP 2s o l v e a l i n e a r e q u a t i o n b y p l o t t i n g a s t r a i g h t -l i n e g r a p h u s i n g e x p e r i m e n t a l d a t a a n d u s e i t t o d e d u c e t h e g r a d i e n t , i n t e r c e p t a n d e q u a t i o n o f t h e l i n eP 3f a c t o r i s e b y e x t r a c t i o n a n dg r o u p i n g o f a c o m m o n f a c t o r f r o m e x p r e s s i o n s w i th t w o , t h r e e a n d f o u r t e r m s r e s p e c ti v e l yP 4s o l v e c i r c u l a r a n d t r i a n g u l a r m e a s u r e m e n t p r o b l e m s i n v o l v i n g t h e u s e o f r a d i a n , s i n e , c o s i n e a n d t a n g e n t f u n c t i o n sP 5s k e t c h e a c h o f t h e t h r e e t r i g o n o m e t r i c f u n c t i o n s o v e r a c o m p l e t e c y c l eM 1 s o l v e a p a i r o f s i m u l t a n e o u s l i n e a r e q u a t i o n s i n t w o u n k n o w n s M 2 s o l v e o n e q u a d r a t i c e q u a t i o n b y f a c t o r i s a t i o n a n d o n e b y t h e f o r m u l a m e t h o d .D 1a p p l y g r a p h i c a l m e t h o d s t o t h e s o l u t i o n o f t w o e n g i n e e r i n g p r ob l e m s i n v o l v i n g e x p o n e n t i a l g r o w t h a n d d ec a y , a n a l y s i n g t h e s o l u t i o n s u s i n g c a l c u l u sD 2 a p p l y t h e r u l e s f o r d e f i n i t e i n t e g r a t i o n t o t w o e n g i n e e r i n g p r o b l e m s t h a t i n v o l v e s u m m a t i o n .U N I T 18: M A T H E M A T I C S F O R T E C H N I C I A N SE d e x c e l L e v e l 3 B T E C N a t i o n a l s i n E n g i n e e r i n g – I s s u e 1 – M a y 2007 © E d e x c e l L i m i t e d 20075G r a d i n g c r i t e r i aT o a c h i e v e a p a s s g r a d e t h e e v i d e n c e m u s t s h o w t h a t t h e l e a r n e r i s a b l e t o :T o a c h i e v e a m e r i t g r a d e t h e e v i d e n c e m u s t s h o w t h a t , i n a d d i t i o n t o t h e p a s s c r i t e r i a , t h e l e a r n e r i s a b l e t o :T o a c h i e v e a d i s t i n c t i o n g r a d e t h e e v i d e n c e m u s t s h o w t h a t , i n a d d i t i o n t o t h e p a s s a n d m e r i t c r i t e r i a , t h e l e a r n e r i s a b l e t o :P 6p r o d u c e a n s w e r s t o t w o p r a c t i c a l e n g i n e e r i n g p r o b l e m s i n v o l v i n g t h e s i n e a n d c o s i n e r u l eP 7u s e s t a n d a r d f o r m u l a e t o f i n d s u r f a c e a r e a s a n d v o l u m e s o f r e g u l a r s o l i d s f o r t h r e e d i f f e r e n t e x a m p l e s r e s p e c t i v e l yP 8c o l l e c td a t a a n d p r o d u ce s t a t i s t i c a l d i a g r a m s , h i s t o g r a m s a n df r e q u e n c y c u r v e sP 9d e t e r m i n e t h e m e a n , m e d i a n a n d m o d e f o r t w o s t a t i s t i c a l p r o b l e m s a n d e x p l a i n t h e r e l e v a n c e o f e a c h a v e r a g e a s a m e a s u r e o f c e n t r a l t e n d e n c yP 10 a p p l y t h e b a s i c r u l e s o f c a l c u l u s a r i t h m e t i c t o s o l v e t h r e e d i f f e r e n t t y p e s o f f u n c t i o n b y d i f f e r e n t i a t i o n a n d t w o d i f f e r e n t t y p e s o f f u n c t i o n b y i n t e g r a t i o n .NIT 18ATHEMATICS FOR ECHNICIANSEssential guidance for tutorsDeliveryThis is a core unit and should be delivered at an early stage of the qualification. It is essential that learners are made aware of the importance of this unit by applying the mathematical concepts to engineering problems whenever possible. It may be beneficial for learners to study Unit 5: Electrical and Electronic Principles and/or Unit 6: Mechanical Principles and Applications concurrently with this unit. Where this is done, assignments can be designed to cover aspects of more than one unit. Before starting this unit, learners should be able to demonstrate proficiency in basic mathematical concepts and the use of an electronic scientific calculator to carry out a variety of functions. As a guide to the level required, tutors should consult Unit 4: Mathematics for Engineering Technicians in the Edexcel Level 2 BTEC First Certificate and First Diploma in Engineering.The learning outcomes are ordered logically and could be delivered sequentially. The use of algebraic methods is required before further skills can be developed and used within the unit. Much of the learning outcome 1 can be practised in pure mathematical terms however, tutors could emphasis where these methods would be applied in an engineering context. Obviously much practise in these methods will prove a valuable foundation for the rest of the unit.Once learners have mastered most of these methods, learning outcome 2 gives opportunities to apply these skills when solving circular and triangular measurement problems. The application of these skills should reflect the context/area of engineering that learners are studying. Formulae do not need to be remembered but correct manipulation of the relevant formulae is very important in solving these problems. Learners should have plenty of practise when drawing graphs for learning outcome 1 and sketching trigonometric functions in learning outcome 2.During the delivery of this unit there should be opportunities for learners to use statistical data that they have collected from engineering contexts or situations. It is much better to put statistics, required by learning outcome 3, in an engineering context than use generalities such as learners’ height etc.Again, for learning outcome 4 opportunities to practise differentiation and integration must be given to ensure learners understand these activities within the range of the content and before they are given assessment activities. The range of these calculus techniques are listed within the content.Note that the use of ‘eg’ in the content is to give an indication and illustration of the breadth and depth of the area or topic. As such, not all content that follows an ‘eg’ needs to be taught or assessed.AssessmentThe assessment strategy used will need to cover all the learning outcomes and associated pass criteria but not necessarily all the topics included in the unit content.6NIT 18ATHEMATICS FOR ECHNICIANS Criterion P1 may be best assessed in the form of a short written test and could possibly also include criterion P3.P2 could be assessed through an assignment using data from either Unit 5: Electrical and Electronic Principles and/or Unit 6: Mechanical Principles and Applications, which ideally would be delivered concurrently with this unit. If this not possible, learners should be given a range of data sufficient for them to plot the graph and work out the gradient, intercept and the equation. Data forcing them to draw the line of best fit, as opposed to a set of points directly on the graphical line, might be most appropriate.For P4 learners could be given a range of different values and assessed by an assignment or a short formal test. The problems given should collectively cover radian, sine, cosine and tangent functions. When considering the content part of this learning outcome it is important that these problems give the learner the opportunity to convert multiples of π radians to degrees and vice versa. The circular measurement problems also need to cover the length of an arc and area of a sector as well as areas and angles measured in radians. Obviously the triangular measurement problems are more basic and only expect application of the three functions.P5 requires learners to sketch each of the three trigonometric ratios and this is probably best done as a classroom exercise. Similarly, P6 could take the form of a written assignment where learners must produce answers to two practical engineering problems involving the sine and cosine rule (eg calculate the phasor sum of two alternating currents and evaluate the resultant and the angle between two forces).Criterion P7 requires learners to calculate the surface areas and volumes for three different regular solids. This could be achieved through an assignment or perhaps by combining it with other criteria in a short formal test.An assignment could be used for P8 where learners collect meaningful data (eg classification of workers within their company) and display this information using different graphical methods (eg bar charts). They also need to produce a histogram and plot frequency curves (eg resistance values of 100 resistors or external diameter of pins).For P9 learners must provide evidence that they are able to determine and then explain the relevance of the mean, median and mode for a set of discrete and grouped data (eg time taken to produce components on a machine rounded to the nearest ten seconds and the 100 resistor values or diameters of pins from P8). This could be done by an assignment. P10 may be assessed through a short formal test, with learners being given a list of the standard differential coefficients and integrals to use.For M1 learners will need to provide evidence that they can solve a pair of simultaneous linear equations in two unknowns (eg equations formed after the application of Kirchhoff’s laws, power transmitted for different belt tensions in a mechanical system). It would be appropriate to use the same assessment method and instrument as P2, possibly combining these two criteria as one assessment activity. M2 could also be assessed by assignment as it requires learners to evaluate the roots of a quadratic equation by factorisation and by the formula method (eg evaluation of an equation formed after the realisation of a practical situation).7NIT 18ATHEMATICS FOR ECHNICIANSBoth the distinction criteria could be assessed through a written assignment. For D1 learners need to apply graphical methods to the solution of two engineering problems involving exponential growth and decay (eg growth of voltage in a capacitor, radioactive decay, application of Taylor’s tool life equation C = VT n) and then analyse the results by applying the appropriate method of differential calculus to check the results.D2 requires learners to demonstrate that they can accurately evaluate two engineering problems involving definite integration (eg area under a velocity-time graph, area under a voltage-current graph).Links to National Occupational Standards, other BTEC units, other BTEC qualifications and other relevant units and qualificationsThis unit has strong links with units from the BTEC Nationals in Engineering.It provides learners with the mathematical basis for all other units within the BTEC National qualification and leads to further study at BTEC Higher NationalCertificate/Diploma level.Essential resourcesLearners will need to possess an electronic scientific calculator and have access to software packages that support understanding of the principles and their application to engineering.Indicative reading for learnersTextbooksBird J — Engineering Mathematics, Fourth Edition (Newnes, 2003) ISBN 0750657766 Tooley M and Dingle L — BTEC National Engineering (Butterworth-Heinemann, 2002) ISBN 07506516608NIT 18 ATHEMATICS FOR ECHNICIANS9Key skillsAchievement of key skills is not a requirement of this qualification but it isencouraged. Suggestions of opportunities for the generation of Level 3 key skills evidence are given here. Staff should check that learners have produced all the evidence required by part B of the key skills specifications when assessing thisevidence. Learners may need to develop additional evidence elsewhere to fully meet the requirements of the key skills specifications.Application of number Level 3 When learners are :They should be able to develop the following key skills evidence : • evaluating solutions tomathematical, scientific and engineering problems • producing graphical solutionsto problems involving statistical and scientific data.N3.1 Plan an activity and get relevant information from relevant sources. N3.2Use this information to carry out multi-stage calculations to do with: a amounts or sizes b scales or proportion c handling statistics d using formulae.N3.3Interpret the results of your calculations, present your findings and justify your methods.。

电力电子技术简介英语作文

Introduction to Power Electronics Technology(电力电子技术简介)Power electronic technology is divided into two branches: power electronic device manufacturing technology and current conversion technology.Now it has become an indispensable professional basic course for the modern electrical engineering and automation specialty, and plays an important role in training the professional talents.Power electronics technology is a new discipline based on electronics, electrical principles and automatic control. Because it is a high-power electrical technology, and mostly serves the industry using strong electricity, it is often classified as electrician. Power electronic technology mainly includes power electronic devices, power electronic circuits, power electronic devices and systems. Semiconductor is the basic material of power electronic devices, and monocrystalline silicon is the most commonly used material; Its theoretical basis is semiconductor physics; Its technology is semiconductor device technology. Microelectronics technology has been widely used in modernnew power electronic devices. Power electronic circuits have absorbed the theoretical basis of electronics. According to the characteristics of devices and the requirements of power conversion, many power conversion circuits have been developed. These circuits also include various secondary circuits and peripheral circuits such as control, trigger, protection, display, information processing, relay contact, etc. According to different application objects, these circuits are used to form complete machines for various purposes, which are called power electronic devices. These devices often form a system with loads and supporting equipment. Electronics, electrotechnics, automatic control, signal detection and processing and other technologies are often widely used in these devices and systems.。