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Power Electronics Technology Papers Power technology is the application of modern power electronics semiconductor devices, integrated automatic control, computer (microprocessor) technology and electromagnetic technology, multi-disciplinary cross-edge technology. In a variety of high-quality, high-performance, high reliability, power play a key role in modern power electronics technology in specific applications. At present, the power electronics for energy and only, automation, intelligent, electromechanical integration, the basis for high frequency applications is moving, and modular hardware structure, product performance of the green direction. In the near future, power electronics technology will enable power more mature technology, economic, practical, high efficiency and the combination of high-quality electricity. [hide] 1. The development of power electronics technology Modern Power Electronics direction of development is from a low-frequency technology to deal with the issue of traditional power electronics, high-frequency technology to tackle the problem in modern power electronics change. Power electronics technology began in the late fifties and early sixties of the rectifier devices, their development has gone through the era of rectifiers, inverters and inverter era era, and to promote the power of electronic technology in many new areas of applications. The late eighties and early nineties developed in order to power MOSFET and IGBT represented, set high frequency, high voltage and high current in the same complex power semiconductor devices, show that the traditional power electronics technology has entered the modern era of power electronics . Rectifier 1.1 times Industrial use of electricity from high-power frequency (50Hz) providing alternator, but about 20% of electricity consumption is based on the form of DC, the most typical is the electrolytic (non-ferrous metal and chemical raw material needs of DC solution), traction (electric locomotives, the diesel electric drive, the Mass Transit Railway locomotive, urban trolley buses, etc.) and direct current transmission (rolling mill, paper, etc.) three main areas. High-power rectifier capable of high efficiency to power-frequency alternating current into direct current, so in the sixties and seventies, high-power thyristor rectifier tubes and the development and application development can be great. At that time, has launched a - stock大办rectifier Arsenal around the boom, large and small manufacturers across the country's semiconductor manufacturers rectifier is a product of that time. 1.2 times the inverter The seventies a worldwide energy crisis, the AC motor variable frequency speed forlorn significant energy-saving effect due to the rapid development. Frequency is the key technology for the DC inverter AC 0 ~ 100Hz. In the seventies to the eighties, with the popularity of frequency converter, power inverter thyristor with mega power transistor (GTR) and gate GTO (GT0) became the power electronics the protagonist of the device. Similar applications include high-voltage DC output, static dynamic reactive power compensation. At this time the power of electronic technology has been able to achieve the rectifier and inverter, but a lower frequency, low frequency is limited in scope. Converter 1.3 times Into the eighties, a large-scale and ultra large scale integrated circuit technology, the rapid development of modern power electronic technology has been the foundation stone. Integrated circuit technology will be the fine processing technology and high-voltage high-current organic combination of technology, there has been a whole new set of full-controlled power devices, power M0SFET The first is the advent of small and medium-sized power supply led to the development of high-frequency, and then insulated gate bipolar transistor (IGBT) the emergence of large and medium-sized power supply for the development opportunities to high-frequency. MOSFET and IGBT's have come out in succession, is a traditional to a modern power electronics into a symbol of power electronics. According to statistics, by the end of 1995, M0SFET and GTR power semiconductor devices in the power market has reached more information on equal access to six Swordsman Park Vocational Education: stage, instead of using IGBT power electronics in the field of GTR had been established. The development of new devices not only for the AC motor VVVF to provide a high frequency, so that more complete and reliable performance, but also modern electronic technology to the development of high-frequency, high-performance equipment for the electric energy-saving materials, the realization of small light quantify, and intelligent mechatronics provides an important technical foundation. 2. Modern Power Electronics applications 2.1 Green power efficient computer The rapid development of computer technology to lead humanity into the information society, but also promoted the rapid development of power technology. Eighties, the comprehensive use of computer switching power supply, computer power supply to complete the first generation. Switching power supply and then into the technologies of electronics, electrical equipment. The development of computer technology, the green power and green computer. Green computer refers to environmentally friendly personal computers and related products, green power and green refers to computer-related high-performance power supply, according to the year l992 the U.S. Environmental Protection Agency on June 17 "Energy Star" Program, the table personal computers or related peripherals, in the sleep state if the power consumption of less than 30 watts, on the line with the Green PC's request to improve the power efficiency is to reduce the power consumption of the fundamental approach. On the current efficiency of 75% of the 200-watt switching power supply, the power consumption of 50 watts to its own source of energy. 2.2 Communication with high-frequency switching power supply The rapid development of the telecommunications industry a great impetus to the development of communication power. Miniaturized high-frequency switching power supply and modern communications technology has become the mainstream of the power supply system. In the communications field, usually referred to as a power rectifier, while DC - DC (DC / DC) as the second power converter. The role of a power supply is single phase or three-phase AC power grid converted into the nominal value of 48V DC power supply. Program-controlled switches in a power supply used in the traditional regulated power supply with controlled high frequency switching power supply has been replaced by high-frequency switching power supply (also known as type rectifier switch SMR) through the MOSFET or IGBT high-frequency work, the switching frequency general control in the range of 50-100kHz, high efficiency and miniaturization. In recent years, the power switch rectifier capacity expanding from stand-alone capacity has 48V/12.5A, 48V/20A expanded to 48V/200A, 48V/400A. Because of communications equipment used in a wide range of integrated circuits, the supply voltage varies, in the communications power supply system for high power density of high-frequency DC-DC isolated power supply module from the intermediate bus voltage (normally 48V DC) transform into a DC voltage required, thus greatly reducing the wear and tear, easy maintenance, and installation is very convenient to increase. General can be directly installed in the standard control panel, on the second power supply high power density requirements. Due to the increasing communication capacity, communication, power supply capacity will also continue to increase. 2.3 DC - DC (DC / DC) Converter DC / DC converter to a fixed DC voltage transformation for the variable DC voltage, which is widely used in trolley buses, subway trains, electric vehicles and control of the CVT, while the above-mentioned control of access to speed up the smooth, fast response performance, and at the same time received the effect of saving energy. DC chopper with rheostat instead of saving energy (20 ~ 30)%. DC chopper can not only play the role of regulator (switching power supply), but also effectively suppresses noise grid side harmonic current role. Communication of the second power supply DC / DC converters has been the commercialization of technology modules using high-frequency PWM switching frequency at about 500kHz, the power density of 5W ~ 20W/in3. With the development of large-scale integrated circuits, power modules to achieve the requirements of small-scale, so we must continuously improve the switching frequency and the introduction of a new circuit topology, there are some companies to develop and produce a zero-current switching and zero voltage switching technology, the Second second power module, power density, a sharp improvement. 2.4 Uninterruptible Power Supply (UPS) Uninterruptible power supply (UPS) is the computer, communications systems, as well as occasions requested can not be interrupted by a high need reliable, high-performance power supply. City by the exchange of electrical input into a DC rectifier, a part of the energy to recharge batteries, the other part of the energy exchange by the inverter into by the change-over switch to the load. In order to inverter failure can provide energy to the load, and the other road through standby power switch to achieve power. UPS generally used in modern pulse width modulation technology and power M0SFET, IGBT and other modern power electronic devices, power supply noise can be reduced, efficiency and reliability can be improved. The introduction of microprocessor hardware and software technology, you can achieve intelligent UPS management, remote maintenance and remote diagnostics. UPS is currently the largest on-line capacity has been done to 600kVA. The development of ultra-compact UPS is also very quickly have 0.5kVA, lkVA, 2kVA, 3kVA and other products. 2.5 Power Converters Mainly used for inverter power supply of variable frequency AC motor speed control, its electric drive system to occupy the position of growing importance, has been a huge energy-saving effect. Inverter main circuit power supply are used to exchange - DC - exchange programs. Power Supply through the rectifier into a fixed DC voltage, and then by the high-power transistors or IGBT high-frequency component of the PWM converters, the DC voltage into a reverse voltage, variable frequency AC output, power output waveform similar to sine wave for AC asynchronous motor drive to achieve stepless speed regulation. International 400kVA power inverter the following products have been available. The early eighties the first to be Toshiba AC frequency converter technology in air-conditioner. To 1997, its share of domestic air conditioners in Japan has reached over 70%. Inverter air conditioner with a comfortable, energy-saving advantages. Domestic in the early 90's began to study frequency conversion air-conditioning, 96 production line was introduced in inverter air conditioners, inverter air conditioner evolving development and production of hot spots. Around the year 2000 will form the climax. In addition to the power inverter inverter air conditioner, but also requires suitable for VVVF motor compressor. Optimal control strategy, selected functional components, is the development of air-conditioning power inverter further development. 2.6 High-frequency welding inverter power rectifier High-frequency inverter welding power rectifier is a high performance, high efficiency, the provincial timber supply a new type of welding machine, welding machine power on behalf of the current direction of development. IGBT module as a result of large-capacity of the business, which also has broad power applications. Most of the power inverter welding machine AC - DC - AC - DC (AC-DC-AC-DC) conversion method. By 50Hz AC into a DC full-bridge rectifier, IGBT, composed of high-frequency PWM DC inverse transform will become 20kHz high-frequency rectangular waves, coupling by high-frequency transformer, rectifier filter stability after the DC, the use of electricity arc. Welding power supply as a result of poor working conditions, frequent in the short-circuit, arcing, open the turn of the changes, so high-frequency inverter welding power supply rectification work to become the most critical reliability issues, but also the issue of greatest concern to users . The use of a microprocessor as pulse width modulation (PWM) of the relevant controller, through the multi-parameter, multi-information extraction and analysis, to predict the system state the purpose of the work, and then advance the system to adjust and deal with and solve the current high-power IGBT inverter power supply reliability. Inverter welding machine abroad can be rated welding current 300A, the rate of 60% duty cycle, the whole set-voltage 60 ~ 75V, current range 5 ~ 300A, the weight of 29kg. 2.7 high-power switch-based high voltage DC power supply High-power switch-based high voltage DC power supply are widely used in electrostatic dust removal, water quality improvement, medical X-ray machines and CT machines and other large equipment. Voltage as high as 50 ~ l59kV, current reached more than 0.5A, power up to 100kW. Since the beginning of 70's, some Japanese companies began to use inverter technology to the city after the power rectifier for the inverter frequency of about 3kHz, and then step-up. Into the 80's, high-frequency switching power supply technology is developing rapidly. Siemens AG of Germany to adopt the master switch power transistor components, the power to the switching frequency above 20kHz. Technology and the success of dry-type transformers used in high-frequency high-voltage power supply, the abolition of the high-voltage transformer tank, so that the transformer further reduces the size of the system. Electrostatic dust domestic high voltage DC power supply for the development, the city into DC power by rectifier using a zero-current switching full-bridge series resonant inverter circuit to DC voltage inverter for high-frequency voltage, and then by the high-frequency step-up transformer, and finally rectifier DC high voltage. Load conditions in the resistor, the output DC voltage 55kV, current of 15mA, operating frequency is 25.6kHz. 2.8 Active Power Filter Traditional exchanges - DC (AC-DC) converter and put into operation in time, will be injected into a large number of power system harmonic currents, causing losses and harmonic interference and network devices at the same time is also the side of the phenomenon of the deterioration of power factor, the so-called "power pollution ", for example, non-controllable rectifier filter capacitor increases, the network-side up to third harmonic content (70 ~ 80)%, the net side of the power factor of only 0.5 ~ 0.6. Active power filter is a kind of harmonic suppression to dynamic new power electronic devices, able to overcome the shortcomings of the traditional LC filter is a promising means of harmonic suppression. Filter by switching bridge power converter and the specific control circuit.
Electric Automation 电气自动化ELECTRIC AUTOMATION DEVICE AND METHOD FOR ADJUSTING THE FUNCTIONS OF THE ELECTRIC AUTOMATION DEVICE The invention relates to an electric automation device comprising a control unit that is controlled by a computer. In order to create an automation device that can be set to predefined functions in a particularly flexible manner while requiring less testing, a computer hardware component (2) is provided with control software comprising a basic functional area which includes an operating system (3), a device driver (4), and communication modules (5) so as to form a basic automation device (1) while the basic automation device (1) is complemented with any application modules (7a, 7b, 7c, 8, 9) that can be connected to the basic functional area via a software interface (6) in order to obtain the automation device. The invention also relates to a method for producing or adjusting the functions of such an electric automation device. 电气自动化专业介绍一、专业概况 随着高新技术的发展和生产自动化程度的提高,我国国民经济发展,正在和继续需要大批技术应用型实用人才。电气自动化技术是现代制造技术中不可缺少的重要技术门类,也是一个国家科技实力乃至综合竞争力的综合反映,在工业发展中具有前导地位。电气自动化技术,集机、电、计算机、信息处理等多学科于一体,是多学科相互交叉、渗透、结系淖酆涎Э疲�诠�窬�媒ㄉ柚姓加兄匾�牡匚弧R虼耍�梢运档缙�远��际跏嵌ヌ炝⒌氐氖乱担�枪�窬�梅⒄购腿嗣裆�钏�教岣叩奈镏侍跫�� ?br> (一)、培养目标本专业培养德、智、体、美、劳全面发展,具有良好职业道德和综合业务素质,具备较强的创新意识和创业能力,掌握电气自动化技术、计算机控制技术的基础理论,能在生产、建设、管理、服务第一线从事常用电气自动化设备、常用电气设备、供配电系统和装置、计算机控制系统、PLC控制系统的安装、调试、运行和维护的实用型高技能专门人才。 (二)、培养要求及职业能力分析 1、培养要求:本专业主要学习电气自动化的专业技术知识,应具有较强的本专业技术应用能力。 2、职业能力分析 (1)具有良好的身体素质、职业道德和人文素质,较强的语言文字表达能力和一定的社会交往能力及继续学习能力。 (2)具有较强的用英语进行人际和人机交流能力,具有阅读和翻译本专业有关英文资料的能力。 (3)具有较强的在信息化社会中工作、学习、生活所必备的计算机应用能力;熟练使用电子电气CAD软件;掌握一门程序设计语言。 (4)具有分析和测试常见的电工电子线路,能设计一般电工电子应用线路,能熟练使用常规电工电子仪器、仪表,具有熟练的电工基本操作技能。 (5)熟悉常用低压电器的基本原理及使用;能熟练阅读电气控制线路的原理图与接线图;具有对常规电气设备、供配电设备等电气控制系统进行安装、调试、维护能力。 (6)具有正确选用、安装、调试、维护电力电子装置和典型交、直流调速系统的能力。 (7)具有熟练的可编程控制器应用能力。 (8)具有以嵌入式计算机数字控制技术为核心的新技术基本应用能力,对相应控制系统具有调试维护能力。 (9)具有对一般的机械零件图、产品装配图与机械、液压和气压传动系统回路的识读能力,了解常用机械设备的结构特点及工艺过程,了解常见的机械和电气的配合关系。 (10)了解企业管理的基本知识,具有一定的质量意识。 (三)、课程设置 课程设置共分五部分:公共必修课、专业必修课、专业限定选修课、专业选修课及公共选修课。 1、公共必修课包括:思想道德修养、法律基础、邓小平理论、马克思主义哲学、体育、英语、高等数学、计算机操作基础等。 2、专业必修课包括:电工基础、模拟电子技术、数字电子技术、电机及拖动基础、机械制图及公差、机械工程基础、嵌入式计算机原理及应用、C语言程序设计、自动检测与转换技术、现代电力电子技术、可编程序控制器应用、自动控制原理与系统、C语言、工厂电气控制技术、电子电气CAD、变配电技术、变频调速原理与应用、工业控制网络、DSP原理与应用及专业英语等。其中主干课程为:电工基础、模拟电子技术、数字电子技术、电机及拖动基础、嵌入式计算机原理及应用、自动检测与转换技术、现代电力电子技术、可编程序控制器应用、自动控制原理与系统等。 3、专业限选课包括:计算机控制技术、工业自动化仪表、控制电机、智能控制等。 4专业任选课包括:电工电子工艺、多媒体技术、楼宇自动化、计算机系统仿真、计算机维修、程序设计(VB)等。 5、公共选修课包括:包括两个能力模块:经济管理科学类和人文与社会科学类。 (四)、实践教学环节 1、专业主要实践教学包括:电工实验、模拟电子技术实验、数字电子技术实验、电机与电力拖动实验、可编程序控制器应用实验、嵌入式计算机原理实验、现代电力电子技术实验、电工基础课程设计、电子技术课程设计、嵌入式计算机原理课程设计、可编程序控制器应用课程设计、自控系统课程设计、综合系统实训、金工实习、电工电子实习、专业参观、综合生产实习、毕业设计等。 2、非专业实践教学包括:入学教育、军训、暑期社会实践、社团活动、体育活动、文艺活动等。 (五)、职业技能证书 本专业证书包含三个方面: 1、公共必修证书:PET、计算机一级证书。 2、专业必修证书:CAD初级、维修电工中级。 3、任选证书:CET四级证书、计算机三级证书(单片机方向)、CAD中级证书、维修电工高级证书、气液电控制技术。 (六)、本专业师资力量 学院拥有一支学术造诣高、教学经验丰富、实践能力强的师资队伍。电气自动化技术专业现有师资26人,其中副高职称以上有17人,“双师型”教师10人。能够满足公共基础课、专业基础课和专业课的理论及实践教学的需要。 二、职业前景 1、对口行业 电气自动化技术是传统而具有新内涵的专业,本专业培养拥护党的基本路线,德、智、体、美等全面发展,具备从事电气自动化技术所需要的理论知识和职业技术能力,主要在生产、建设、服务和管理等第一线工作的高级技术应用性专门人才。本专业的毕业生可就职于国防、航天、航空、航海、铁道、机械、轻工、化工、电子、电力、电信、钢铁、石油、矿山、煤炭、地质、勘测等广泛的工业、农业、科学研究领域,也可就职于现代物流及现代服务业。 2、就业前景 在上海市经济委员会的《上海制造业战略升级的行动纲要》中指出:加快推动制造业的战略升级是贯彻党的十六大精神,坚定地走新型工业化道路,实现向制造业强国转变的国家战略需要,也是上海建立新型产业体系,提高城市综合竞争力,坚持“四个中心”的客观要求。上海制造业战略升级的重点包括:高新技术产业重点发展电子信息和现代生物与现代医药制造业;交通运输设备制造业重点发展汽车、轨道交通、船舶、民用飞机;装备制造业重点发展大型成套设备、电站设备、新能源和新型环保设备制造业;原材料制造业重点发展石油化工和精细化工、精品钢材制造业;生产性服务业重点发展制造业物流、技术服务等产业;大力发展就业广、清洁型的都市型工业。根据电气自动化的内涵,上述产业无不包含电气自动化技术,同时也对电气自动化技术专业的人才提出了更高的要求。据上海市政府组织的《面向新世纪上海紧缺人才需求趋势与开发研究对策》的报告显示,复合型技术人才是紧缺的专业人才,而电气自动化技术专业是培养复合型技术人才的有效载体。可以预见在未来数年内,电气自动化专业毕业生就业前景良好。
《Design with Operational Amplifiers and Analog Integrated Circuits》作者,Franco博士。《模拟电子技术基础》(美国)托马斯 L.弗洛伊德(Thomas L.Floyd) (美国)大卫 M.布奇拉(David M.Buchla) 《模拟集成电路的分析与设计》作者:(美)格雷(Gray,P.R.)《模拟集成电路设计精粹(配光盘)(清华版双语教学用书)》作者:(美)桑森(Sansen,W.M.C.)《集成微电子器件(英文版)》作 译 者:(美)吉泽斯·A. 德尔阿拉莫《模拟CMOS集成电路设计(英文版》作者: (美)Behzad Razavi《电子电路分析与设计——模拟电子技术》作者,美国的纽曼还有好多优秀的外文教材资料,在这里就列这几个。推荐看纯英的,这样会比较好的提升自己。
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