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模拟式PVC焊接机温度控制器设计_电气工程论文
目录 摘要I AbstractII 1 绪论2 1.1 课题研究背景2 1.2 课题设计的目的及目标2 2 方案选定4 2.1 方案的论述4 2.2 方案的选定4 3 温度传感器的简介6 3.1 温度传感器的构成6 3.2 温度传感器的发展7 3.3 智能温度传感器发展的新趋势8 3.4 国内温度控制器现状9 4 系统的硬件设计9 4.1 电源电路模块11 4.2 温度检测电路20 4.3基准电压电路21 4.4 温度指示电路22 4.5 电压比较放大电路22 4.6 控制执行电路23 5 总结24 致 谢25 参考文献26 摘要 温度是一个重要物理参数，在许多场合需要对对温度进行测量和控制。温度控制器在各行业中也得到了广泛的应用，温度控制器的种类日渐增多。 本次设计的低成本温度控制器，以LM324芯片为核心设计温度控制器。该方案是通过铂电阻温度传感器对系统进行一系列的温度检测，然后在把测得的数据通过LM324进行放大处理，再经过与设定的电压值进行比较，通过PNP管的通断来控制交流接触器和直流继电器的通断，从而控制对加热器的工作状态。 此温度控制器电路图的温度控制范围为200~280℃，主要应用于焊接机的温度控制。主要由电源电路、温度检测电路、基准电压电路、温度指示电路、电压比较放大电路和控制执行电路组成。 关键词： 温度控制 温度传感器 继电器 LM324 Abstract Temperature is an important physical parameter, on many occasions to temperature measurement and control facility. Temperature controller in industries in a wide range of applications, temperature controller is increasingly types. The design of the low cost, LM324 temperature controller chip design as the core temperature controller. This is by platinic resistance temperature sensor of a series of temperature sensor, and the measured data in LM324 through amplification, and then pass with setting the voltage, through comparing the PNP transistors to control the ac contactor, control of heater working condition. The temperature controller for the temperature control circuit, 200-280 degrees are mainly applied in welding machine, the temperature control. Mainly by the power circuit, temperature detection circuit voltage circuit, temperature, the benchmark instructions circuit, voltage amplifier circuit and control circuit. Keywords: temperature control temperature sensor relays LM324
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某停车库低压配电系统的设计
目 录 摘 要 Abstract 1 前 言1 2 电气设计说明2 2.1 工程设计概况2 2.2 设计依据2 2.3 设计范围及内容2 3 配电系统设计5 3.1 负荷等级及供电要求5 ３.1.1 负荷等级分类5 3.1.2 供电要求5 3.2 负荷计算6 3.3 供电及电量计算6 3.4 配电设计6 3.5 室内配电线路7 4 照明系统设计8 4.1 一般原则8 4．2 行车道灯具的布置9 4.３ 节能照明10 4.４ 应急照明10 4.５ 本工程照明要求12 5 火灾自动报警及消防联动控制系统设计13 5.1 火灾报警系统及消防系统概述14 5.1.1 火灾报警系统14 5.1.2 消防系统14 5.2 车库设计总则15 5.3 消防设备配电与非消电源切除16 5.4 设计说明17 5.4.1 导线选择17 5.4.2 字母标识 18 5.4.3 消防系统18 5.4.4 消防系统内容19 5.5 平面工程设计19 6 总 结20 致 谢21 参考文献22 附录23 摘 要 随着社会的发展，生活水平的提高，私家车车数量的增长正在变得越来越快。汽车的停靠和安置问题变得日益突出。加紧小区住宅停车库的建造已经变得刻不容缓，成为了建筑设计建造中不可或缺的环节。同时进入了21世纪的建筑电气设计发展一步千里，飞速发展。现代建筑电气技术已发展成汇集、涵盖、应用了电脑、电气设备、自动控制、计算机、网络、通信等技术，在现代建筑中的地位越来越重要。停车场的建筑电气设计作为建筑电气设计中具有代表意义的一个旁支有着时代和现实社会公用的双重意义。现今的停车场建筑电气的设计必须符合现代建筑设计的要求。需要满足现代建筑电气节约能源，节约有色金属的利用，合理布局空间，朝着合理化，自动化，人性化的方向发展设计要求。停车库低压配电系统的设计也随着时代的发展被摆上了台面，具有普遍的现实意义。 此次设计采用AUTOCAD软件进行绘图设计，总共完成图纸共４幅，其中配电系统１幅，照明系统１幅，火灾报警２幅。 本汽车库的低压配电设计作为毕业设计，最终目的是通过设计实践，学习和掌握绘图软件AUTOCAD的使用，培养锻炼了独立分析和解决建筑电气方面问题的能力，为毕业之后的学习理清了思路，为工作奠定了坚实的基础。 关键词：停车库 ; 电气 ; 低压配电 Abstract With the development of society, living standards, the number of private car growth is becomingmore and more rapidly.Motor vehicle stop and resettlement issues become increasingly prominent.To intensify the residential parking district has become imperative for the construction, architectural design has become an integral part of the construction.At the same time to enter the 21st century architectural design of the development of electric step journey of a thousand miles, the rapid development. Electrical technology has developed into modern architecture together, cover, use of computers, electrical equipment, automatic control, computer, network, communications and other technologies, the status of modern architecture in more and more important.Electrical design of the building parking lot as the building with the representative of the electrical design of a supplementary significance of the times and the real world has a double meaning of the public.Present-day electrical construction of the car park must be designed to meet modern architectural design requirements.Need to meet modern building electrical energy, the use of non-ferrous metals, rational distribution of space, towards the rationalization, automation, development of human design requirements.Low Voltage Distribution System of parking garage design right now was put out with the development of the times, has a practical significance to those engaging in this area. The design uses AUTOCAD drawing software design drawings were completed by a total of four, including a picture of power distribution system, a picture of lighting system,two pictures of fire alarm. electrical design of The multi-storey residential as a graduation disgen , the purpose of this design is to give us a chance of synthetical usage of the knowledge we have learned , Studying and mastering the use of AUTOCAD , it can train our ability to analyze and solve practical problems in Construct electricity in dependently , and help study for Clearing thinking to me . so that the heory is connected with practice and a solid base is made in favor of future. Keywords: parking garage ; electrical; low-voltage distribution
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某高层住宅建筑电气设计_电气工程论文
目 录 摘要…………………………………………………………… ………………. . .……………..I Abstract…………………………………………………………… ………………. . .………..Ⅱ 1 前言………………………………………………………………………………… ………..1 2 电气设计说明……………………………………………………………………………. . .2 2.1 工程概况………………………………………………………………………….……2 2.2 设计依据…………………………………………………………………………….....2 2.3 设计范围………………………………………………………………………. . .……2 2.4 设计主要工作…………………………………………………………………….……3 3 供配电系统设计…………………………………………………… …………………… 4 3.1 负荷分级及供电措施…………………………………………………………………4 3.1.1 负荷分级……………………………………………………………………….4 3.1.2 各级负荷的供电措施………………………………………………………….4 3.1.3 本高层住宅的负荷分级及供电措施………………………………………….4 3.2 本工程的负荷计算……………………………………………………………………5 3.2.1 负荷计算的方法……………………………………………………………….5 3.2.2 本高层住宅的负荷计算……………………………………………………….7 3.3 电气设备的选择…………………………………………………………………….…10 3.3.1 低压断路器的选择……………………………………………………………..10 3.3.2 导线型号及截面选择………….…………………………….…………………11 3.4 配电设计…………………………………………………………………………… . ..13 3.4.1 室内配电线路………………………………………………………………… 13 4 照明系统设计………………………………………………………………… …………..15 4.1 一般规定………………………………………………………………………………15 4.1.1 照明光源选择的一般原则…………………………………………………….15 4.1.2 照明灯具选择的一般原则…………………………………………………….15 4.1.3 插座选择的一般原则………………………………………………………….15 4.2 插座的设计……………………………………………………………………………16 4.3 照明的设计……………………………………………………………………………16 4.3.1 一般照明设计……………………………………………………………….. . 16 4.3.2 应急照明设计……………………………………………………… …………19 5 弱电系统设计………………………………………………………………… …. . .……20 5.1 电话通讯系统的设计…………………………………………………… …………. 20 5.2 有线电视系统的设计………………………………………… ……………………..21 5.2.1 前端系统…………………………………………………………………….. . 21 5.2.2 分配系统…………………………………………………………………….. . 21 5.2.3 线路敷设…………………………………………………………………….. . 21 5.3 信息网络系统的设计…………………………………………………………………22 6 消防系统设计……………………………………………………………………………...23 6.1 保护等级与保护范围的确定…………… …………………… ……………………..21 6.1.1 高层建筑防火保护方式………………………………………………………..21 6.1.2 高层建筑保护等级的确定……………………………………………………..21 6.2 火灾自动报警系统设计………………………………………………………………23 6.3 消防设备的联动控制…………………………………………………………………25 6.4 火灾应急照明与疏散指示标志……………………………… …………………….. 25 6.5 消防控制室…………………………………………………… ………………… …..27 6.6 线路敷设……………………………………………………… ………………… …..27 7 防雷接地系统设计………………………………………………………………………. 29 7.1 防雷等级的确定………………………… …………………… ……………………..29 7.2 保护措施………………………………… …………………… ……………………..29 7.3 接地与安全……………………………… …………………… ……………………..30 7.3.1 接地……………………………………………………………………………..30 8 结论…………………………………………………………………………………………. 32 致谢……………………………………………………………………………………………… 33 参考文献………………………………………………………………………………… ….. …34 附录1 电气设计施工说明 附录2 照明平面图 附录3 弱电平面图 附录4 屋顶防雷平面图 附录5 配电系统图 摘要 随着科学技术的飞速发展以及人民生活水平的不断提高，高层建筑正向着自动化、节能化、信息化、智能化方向蓬勃发展。特别是智能建筑的兴起，已经成为衡量一个国家或地区经济发展和科技进步的一个重要标志之一。本设计是某小区某高层住宅的建筑电气设计。 本工程为地上12层高档住宅，地上一层为商铺和住宅的综合体，二至十二层全部为住宅。占地面积约为1300平方米，每层层高为3.6m。室内外高差为0.40m。本工程为一类建筑，二级负荷供电，消防系统及部分重要负荷采用双电源同时供电，电源由小区变电站引来，三相五线制，采用TN—C—S系统，采用树干式配电方式至各分配电箱。 设计包括：供配电系统设计，建筑照明设计，插座布置，防雷与接地，共用天线电视系统（CATV）设计，消防系统,电话系统以及信息网络系统。重点是强电部分的设计，主要设计该工程的配电系统和照明系统。 关键词： 建筑电气、照度、布线、负荷计算 Abstract With the rapid development of science and technology, as well as the continuous improvement of people's living standards, high-rise building is toward automation, energy, information and intelligent direction to flourish. In particular the emergence of intelligent buildings, has become the measure of a country or region's economic development and scientific and technological progress as an important landmark. The design is a residential high-rise residential buildings of a certain electrical design. The ground works for the 12-storey high-end residential, the ground floor for shops and residential complexes, 2-12 all-storey residential. Covers an area of about 1300 square meters, the high levels for every 3.6m. Indoor and outdoor relief for the 0.40m. The construction works for a class of primary and secondary load power supply, fire fighting system and an important part of the load at the same time dual power supply, power substation caused by the district, three-phase five-wire system, the use of TN-C-S system, the use of tree-type approach to the distribution of power distribution boxes. Design includes: power supply and distribution system design, architectural lighting design, socket layout, lightning protection and grounding, Master Antenna Television System (CATV) design, fire safety systems, telephone systems and information network system. Strong focus on the design of electrical parts, the main design of the project is distribution system and lighting system. Keywords： Electrical construction 、Lighting 、Wiring 、Load calculation
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直流电机控制的MATLAB仿真
目 录 摘要…………………………………………………………………………………………………..I Abstract………………………………………………………………………………………………. II 1 绪论……… ……… ……… ….………………………….…… ……… …………………..…..….1 1.1研究MATLAB语言在直流电机中的应用意义…………………………………….……………1 1.2 MATLAB语言的简介……………………………………………………………………….…....1 1.2.1 MATLAB语言发展的背景……………………………………………………………….……1 1.2.2 MATLAB语言的应用…………………………………………………………………….……4 1.3本文工作内容…………………………………………………………………….……4 2 SIMULINK的介绍和应用…… … ……… …….…..………...………………………… …… .… ..5 2.1 SIMULINK的简介及其特点……………………………………………………………….…....5 2.2 SIMULINK的使用…………………………… ………………… ………… … ………….…… 7 3直流电动机调速………………………………………………………………………………..…...8 3．1 直流电动机调节电枢电压调速… …………………………………. .…………….……….8 3．2 直流电动机调节励磁电流调速……………………………..…………… ..………………10 3．3 直流电动机电枢回路串电阻调速……………… ….. …………………… ..……………11 4 单闭环直流调速系统的MATLAB建模与仿真………… …………… …… …….… …… ...14 4.1转速单闭环调速系统设计意义………………………………………..…………….……….14 4.2单闭环调速系统的组成………………………………………..……………..………………14 4.2.1 转速单闭环调速系统的组成…………………………………………………….…..15 4.3仿真模型及其结果比较………………………………………..……………..………………15 5 双闭环直流调速系统的MATLAB建模与仿真……… ……… … …….....…18 5.1 双闭环调速系统的组成…………………………………….…..………….………….....…18 5.2双闭环直流调速系统的数学模型…………………………… ………….….………… ....…18 5.3 调节器设计…………………………………………………………………………..……….19 5.3.1 电流调节器的设计……………………………………………………………….…..19 5.3.2 速度调节器的设计……………………………………………….…………….…….20 5.4 双闭环直流调速系统仿真……… ……… ……… … ………… ………… …….………..…21 6 结 论………………………………………… ………… ……… ……………….. ………….……24 致 谢………………………………………………………………………………..…………….……25 参考文献…………………………………………………………………………………………....…26 摘 要 MATLAB仿真在科学研究中的地位越来越高，如何利用MATLAB仿真出理想的结果，关键在于如何准确的选择MATLAB的仿真。本文就简单的开环直流调速系统的MATLAB仿真这个例子，通过对MATLAB的仿真，得到不同的仿真结果。通过仿真结果的对比，对MATLAB的仿真进行研究。从而总结出如何在仿真过程中对MATLAB的仿真做到最优选择。 然后详细介绍了用MATLAB语言对《电机与拖动》中直流电动机调速仿真实验的仿真方法和模型建立。其仿真结果与理论分析一致，表明仿真是可信的，可以替代部分实物实验． 最后讨论了MATLAB在双闭环直流调速系统教学中的应用。首先在分析直流调速系统原理的基础上, 介绍了基于数学模型的仿真, 在仿真中可灵活调节相关参数, 优化参数设计。其次完成了基于电气原理图仿真, 并分析了调速系统的抗干扰能力。采用工程设计方法对双闭环直流调速系统进行设计,选择调节器结构,进行参数的计算和校验；给出系统动态结构图,建立起动、抗负载扰动的MATLAB /SIMULINK 仿真模型。分析系统起动的转速和电流的仿真波形,并进行调试,使双闭环直流调速系统趋于合理与完善。 关键词：MATLAB；直流电动机调速；双闭环调速系统； MATLAB /SIMULINK仿真；仿真实验 Abstract The Matlab is playing an important part in the scientific research, whether we adopt optimum simulation of Matlab decide whether we can get ideal simulation results. This text takes the split-loop direct current velocity-adjust system for example, and we can get different simulation results by choosing different simulation. We study the simulation of Matlab by comparing the simulation results. At last we summarize how we can achieve the superior choice of simulation of Matlab in the simulation process. Then this paper introduces the method of the simulation and modeling of DC motor speed regulating in electrical motor drive. Simulation is consistent with theory analysis, t can take the place of the parts of real objects experiment. At last ,the application of Matlab in the teaching of DC speed control system with dual-closed loop is discussed in the paper. Firstly, the simulation of the mathematic model which based on the analysis of DC speed control system’s theory is introduced. Parameters can be flexibly modulated; the parameter design can be optimized as well. Then, the simulation by the electric theory chart is finished. The speed control system’s anti-disturbing ability is analyzed. Engineering design of DC speed control system with dual-closed loop, choice of regulator, the parameters of calculation and validation; dynamic structure of the system are given, and establish a dynamic, anti-load disturbance of the MATLAB / SIMULINK simulation model. Starting analysis system and the speed of the current wave simulation and DC speed control system with dual-closed loop converter so that more reasonable and perfect the system. Keywords: MATLAB; DC motor speed regulating; DC speed control system with dual-closed loop ; MATLAB / SIMULINK simulation ;Simulation experiment
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遥控型多彩LED灯箱控制器开发
目 录 摘 要I AbstractII 1 绪 论1 2 总体方案设计2 2.1 系统总体结构2 2.2 系统硬件描述2 2.2.1 控制单片机2 2.2.2 STC11F01单片机的特点3 2.2.3 驱动模块----IRF8405 2.3 红外遥控技术6 2.3.1 红外遥控系统的组成6 2.3.2 红外遥控信号的接收6 2.3.3 红外遥控编码规律7 2.4 LED灯箱7 3 系统硬件设计8 3.1 系统硬件设计原理8 3.1.1 系统硬件电路图9 3.2 系统硬件实物图11 4 系统软件设计13 4.1 系统软件设计的基本思路13 4.1.1 STC11F01看门狗的应用13 4.1.2 STC11F01定时器的应用14 4.2 如何用软件实现系统复位17 4.3 程序18 5 总 结19 致 谢20 参考文献21 附 录22 摘 要 本次毕业设计的主要任务是设计一个遥控型多彩LED灯箱控制器。LED有着高效、节能、环保等突出的优点，因此高能效的LED已经遍布工业化国家日常生活的各个角落。LED技术也越来越多地被应用于照明领域，任何城市的街道两旁，不是门面就是店铺，这些生意人都不惜代价，用各种醒目“LED电子灯箱”凸显个性招揽客户。灯箱的技术发展方向是：节能、方便、美观。如果能同时实现这几种功能，这将会是灯箱行业的一次革命。 本次设计提出了一种基于STC单片机的LED灯箱控制方案，采用红外遥控实现对LED灯箱的遥控控制。通过研究采用STC11F01单片机控制灯箱8种工作模式，通过IRF840 MOSFET驱动电路，12V→5V的降压、稳压电路进行供电。 遥控型多彩LED灯箱控制器的出现就相当于出现了很大的方便，多彩的灯箱带给人们多彩的心情。它将会给我们的LED灯箱用户带去更好的效益。 关键词： LED、IRF840、STC11F01单片机 Abstract The main task of graduation is to design a remote control Multicolor LED Light controller. LED has the advantages of high efficiency, energy saving and environmental protection. So the energy-efficient LED has been around every corner of daily life in industrialized countries. LED technology is also increasingly being used in lighting, no city streets, not only façade but also a shop. To those who are at all costs, using a variety of eye-catching "LED Electronic light box," highlighting the personality to attract customer. The development of light box technology is energy saving, convenient and beautiful. If it achieves these types of functions together, it will be a revolution in the industry Light box. This design presents a single chip control scheme of LED lamp which is based on STC11F01 microcontroller , and uses infrared remote control to achieve remote control. After studying we used STC11F01 MCU to control eight modes，IRF840 MOSFET drive circuit and 12V → 5V step-down power supply regulator circuit. Remote Multicolor LED Light controller is equivalent to the appearance that there are great convenience .Colorful light boxes brought to people's colorful feelings. It will bring better benefit to the LED light box users. Keywords: LED、IRF840、STC11F01 microcontroller
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电参数监测仪上位机软件设计
目录 摘要 I 英文摘要 II 1 绪论 1 1.1 背景 2 1.2 任务和目标 2 2 总体设计方案 2 2.1 系统总体流程 2 2.2 下位机系统连接方案的实现 3 2.3 串口对通讯事件捕捉的实现 3 3 编程语言及编程环境 5 3.1 C++语言介绍 5 3.2 Visual C++6.0编程环境介绍 5 3.3 MFC程序框架介绍 6 3.4 基本界面的建立 6 3.4.1 基本界面 6 3.4.2 对话框 7 3.4.3 控件介绍 7 3.4.4 串行通信的建立及基本参数的设定 8 3.4.5 使用MScomm控件进行串口编程 10 3.4.6 串口通信的自定义协议及数据处理 12 3.5 电参数察看功能 13 4 上位机对接收数据的转换处理 15 4.1整数拆分成字符数组 15 4.2判断传输中的数据是否发送完毕 16 4.3数据传输实现代码 16 5 按钮功能实现 17 5.1打开串口事件处理 17 5.2关闭串口事件处理 18 6 系统调试 19 6.1系统功能调试 20 6.2现场测试功能改进方向 20 7 总结 20 8 致谢 21 参考文献 22 附录 23 摘 要 在现代社会中，电能是一种最为广泛使用的能源。在科技突飞猛进的今天，无线、远程、精确、小型化、智能化引领者科技发展的方向，这也急需多功能电力参数检测仪的研制能够提供更快更精确的技术支持。一般来说，电力参数检测仪将系统分为人机接口、主控模块、信号处理模块等多个功能模块，各模块之间通过信息减缓协调工作。 随着计算机、电子、通讯技术的飞速发展，人们对于车间现场设备的运行管理控制，可视化操作等综合水平提出了新的要求。为了满足这新的要求，本毕业设计以C语言作为开发语言，VC为开发环境，针对某电器产品编写了应用程序，将该产品的现场设备界面通过串口通信技术，与上位机界面有机的结合起来，以实现计算机的远程监控功能。本毕业论文通过这个项目的开发过程，阐述了编程环境的选择，串口通讯实现远程测试的方法，探讨如何在PC平台与工控机平台间建立远程测试和历史数据读取和分析的一般方法。 关键词：人机界面；串口通信；Visual C++6.0；电力参数监测 Abstract In modern society, electricity is one of the most widely used source of energy. Electrical appliances also need to be adapted to automated production development of the market economy. In today's technological advances, wireless, long-range, precision, small and intelligent leader in the direction of technological development, which in urgent need of multi-function power detector parameters can provide faster and more accurate technical support. In general, the power parameters of the system detector is divided into man-machine interface, control modules, signal processing module, such as functional modules, each module through the coordination of information slow.With the computer, electronics, the rapid development of communication technologies, people at the scene shop equipment for the operation of management controls, an integrated visualization operation of the level of proposed new requirements.In order to meet these new requirements, the graduation project in C++ language as a development language, VC for the development environment, an electrical products for the preparation of the application, the product of the field device through the serial communication interface technologies, and organic PC interface combine in order to achieve the remote monitoring function of the computer. This thesis through the project development process, explained the choice of programming environment, serial communications to achieve long-range tests to explore ways in PC platforms and the establishment of industrial computer platforms remote testing and data acquisition and analysis of the history of the general method. Key words：Human-machine interface； Serial Communication;；Visual C++6.0；Power Parameters Monitoring
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某10KV配电所电气系统设计
目 录 摘要 ……………………………………………………………………………………………………Ⅱ Abstract………………………………………………………………………………………………Ⅲ 1 前言…………………………………………………………………………………………………1 2 原始数据……………………………………………………………………………………………2 2.1 基础资料……………………………………………………………………………………2 2.1.1 车间组成及布置………………………………………………………………………2 2.2 设计资料……………………………………………………………………………………2 2.2.1 负荷资料………………………………………………………………………………2 2.2.2 工厂总平面图…………………………………………………………………………2 2.3 供电协议……………………………………………………………………………………3 2.4 本厂自然条件 ……………………………………………………………………………3 2.4.1 气象条件………………………………………………………………………………3 2.4.2 地质及水文条件………………………………………………………………………3 3 设计大纲 ………………………………………………………………………………4 3.1 工厂供电设计的一般原则………………………………………………………………4 3.2 设计内容及成果 ……………………………………………………………4 3.2.1 工厂供电设计的基本内容………………………………………………4 3.2.2 工厂高压配电线路设计…………………………………………………5 3.2.3 车间低压配电线路设计…………………………………………………5 3.2.4 设计成果…………………………………………………………………6 4 设计内容 ………………………………………………………………………………7 4.1 负荷统计和无功功率补偿………………………………………………………………7 4.1.1 负荷计算………………………………………………………………………………7 4.1.2 无功功率补偿…………………………………………………………………………9 4.2 车间变压器容量和台数的选择………………………………………………………10 4.3 总配电所位置的选择 …………………………………………………………………10 4.3.1 变配电所所址选择的一般原则 ……………………………………………………10 4.3.2 负荷中心的确定方法 ………………………………………………………………11 4.4 变配电所主接线图的设计……………………………………………………………11 4.4.1 变配电所主接线设计的原则 ………………………………………………………11 4.4.2 变配电所主接线方案的技术经济指标 ……………………………………………11 4.4.3 设计方案 ……………………………………………………………………………12 4.5 短路电流计算……………………………………………………………………………13 4.5.1 短路时的短路电流 …………………………………………………………………13 4.6 导线选择…………………………………………………………………………………15 4.6.1 架空线选择 …………………………………………………………………………15 4.6.2 母线选择 ……………………………………………………………………………15 4.6.3 各变电所电缆选择 …………………………………………………………………15 4.7 电气设备选择……………………………………………………………………………15 4.7.1 高压开关柜的选择 …………………………………………………………………15 4.7.2 高压开关柜主要电气设备 …………………………………………………………16 4.8 继电保护装置设置 ……………………………………………………………………17 4.8.1 对继电保护装置的基本要求 ………………………………………………………18 4.8.2 过电流保护装置 ……………………………………………………………………18 4.9 力稳定和热稳定校验 …………………………………………………………………19 4.10 厂区高压配电系统设计………………………………………………………………19 4.10.1 接线方式设计………………………………………………………………………19 4.11 全厂配电系统 …………………………………………………………………………20 4.11.1 变配电所主接线设计的一遍步骤…………………………………………………20 4.11.2 配电系统图…………………………………………………………………………20 4.12 防雷装置设计 …………………………………………………………………………20 5 总结……………………………………………………………………………………21 致谢 ………………………………………………………………………………………22 参考文献………………………………………………………………………………………………23 附录1 …………………………………………………………………………………………………24 附录2 …………………………………………………………………………………………………25 摘 要 随着工厂在国民经济发展中的作用的日益突出，电能是联系各工厂企业的重要因素，安全生产及正确的利用电能，是企业发展的基础，必须给予高度的重视。 本文根据10kV进线塑料制品厂企业供配电特点，介绍了10kV进线塑料制品厂企业内主要的供配电方式。根据工厂原始资料，负荷计算。根据计算负荷，选择车间变电所变压器台数及其容量。根据车间总负荷，选择车间变电所位置和总配电所位置。然后设计二种电气主接线并作技术经济比较后拟定全厂配电系统草图。通过短路电流计算，选择高压进线及高压配电装置（柜），设置继电保护装置，绘制全厂配电系统全图。设计厂区高压配电系统的接线方式和配电线路。 关键字： 负荷计算；变压器；主接线；继电保护 Abstract As factories play more and more important roles in society economic development,，electric energy becomes an important factor to connect difference factories and enterprises. Safety in production and correct utilization of electric energy become the foundation of enterprise development，so sufficient attention should be given to these. Based on the 10 kV line into plastic products factory for the distribution characteristics of enterprises, on the 10 kV line into plastic products factory enterprises within the main power supply。According to the factory original data, calculate the load. According to the calculation load, select the number of transformers and capacity of substation transformers. According to the total plant load, select plant substation location and the location of the main distribution. Then design two kinds of main electric connection and make technical and economic comparison, study out the draft of the whole plant distribution system. By short-circuit current calculation, select the high-voltage line and the high-voltage distribution equipment (cabinet), setup the relay protection devices, and protract the whole plant distribution system plan. Design the connection and distribution of the factory’s high-voltage power distribution systems. Keywords： Load calculation； Transformer； Main connection； Relay protection
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智能建筑BA系统的设计与研究
目 录 摘要……………………………………………………………………………. . .….….….……...I 1 前言………………………………………………………………..………………...………..1 2 智能建筑……………….…..………………………….……………….…………………….2 2.1 现代建筑与智能建筑……………………………………………………………………2 1. 现代建筑的特点……………………………………………………………………….2 2. 现代建筑智能化的主要内容………………………………………………………….3 2.2 智能建筑………………………………………………….…….……..........3 1. 智能建筑的起源与发展……………………………………………………………….4 2. 智能建筑的概念及组成……………………………………………………………….5 3. 我国智能建筑的发展概况…………………………………………………………….7 3 BA系统…………………………………………………………………………………….....8 3.1 楼宇自控系统概述…………………..……..…………………………….……………..8 3.2 BA系统的构成…….………………………………………………….…………………9 3.3 BA系统的控制方式.………………………………….…………………………………10 1. DCS集散控制………………………………………………………………………….10 2. FCS现场总线控制…………………………………………………………………….10 3. 网络集成系统…………………………………………………………………………12 3.4 BAS中的关键技术………………………………………………………………………12 1. 直接数字控制器（DDC）………………………………………………………………12 2. 网络控制器……………………………………………………………………………14 3. 组态软件……………………………………………………………………………....14 4. 控制网络与数据传输协议……………………………………………………………15 4 EAC项目中BA系统的运用……………………………..………………………………...16 4.1 EAC简介…………………………………………………………………………………16 4.2 方案介绍………………………………………………………………………………..16 1. 项目概述………………………………………………………………………………16 2. S600 APOGEE系统.……………………………………………………………………16 系统简介………………………………………………………………………………17 系统网络结构…………………………………………………………………………18 中央工作站……………………………………………………………………………18 3. 设计目标……………………………………………………………………………....18 4. 设计依据………………………………………………………………………………19 5. 控制方案………………………………………………………………………………19 空调机组监控…………………………………………………………………………19 新风机组监控…………………………………………………………………………24 给排水系统监控……………………………………………………………………....26 变配电系统监控……………………………………………………………………....28 公共照明系统监控……………………………………………………………………29 电梯系统监控…………………………………………………………………………29 送排风系统监控……………………………………………………………………....30 中央工作站……………………………………………………………………………31 通讯网络………………………………………………………………………………32 系统结构………………………………………………………………………………34 世界知名BA厂商介绍……………………………………………………………………36 5.1 霍尼韦尔(Honeywell)…………………………………………………………………36 5.2 西门子(SIEMENS)………………………………………………………………………36 5.3 江森(Johnson)…………………………………………………………………………37 5.4 艾顿(Alerton)…………………………………………………………………………38 5.5 台达(Delta)……………………………………………………………………………38 5.6 结论……………………………………………………………………………………..39 总结………………………………………………………………………………………………40 致谢…………………………………………………………………………………..41 参考文献……………………………………………………………………………..42 摘 要 随着人类社会从工业化时代进入到信息时代,一方面人们对建筑的要求已不局限于使用空间，而是更加注重建筑的舒适、安全、方便等方面的要求。另一方面，随着网络技术、通讯技术、电子技术、计算机技术、 自动控制技术、人工智能技术等的迅速发展，使得建筑物自动化管理成为可能。因此，强大的经济效益驱动与信息技术的良好机遇相结合，建筑设备监控系统（即楼宇自控系统）应运而生。楼宇自控系统作为智能化系统的重要组成部分，其目的是对楼宇机电设备和能源进行智能化管理，来创造安全、舒适的生活与工作环境。所以BAS系统具备对楼宇内空调通风系统、变配电系统、给排水系统、电梯系统、照明系统、泛光照明等大量机电设备进行有条不紊综合协调、科学管理的能力，最大限度的发挥机电设备的效力。 关键词：楼宇自控 BA系统 空调通风系统 给排水系统 Abstract As human society from the industrial age to the information age to enter, it is right the needs of construction is not limited to the use of space, but focused more on the construction of comfort, security, convenient for the other, while with the network technology, communications technology, electronic technology, computer technology, automatic control technology, AI technology is developing rapidly, building automation management makes possible. Thus, the economic benefits of a strong IT-driven with a good opportunity for the combination of construction equipment monitoring system has been produced. Intelligent Building Automation System as an important component of the system, with the aim of building electrical equipment and intelligent energy management, to create a safe, comfortable living and working environment. So BAS system to the building air-conditioning ventilation systems, variable power distribution system, water supply and drainage systems, elevators, lighting systems, the Pan-lighting, and other large electrical and mechanical equipment for the integrated and coordinated in an orderly, scientific management's ability to maximize the play of the mechanical and electrical equipment Effectiveness. Keywords：Building Automation、System BA、air conditioning and ventilation systems、water supply and drainage systems
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100W的D类功率放大器的设计_电气工程论文
摘要.…………………………………………………………………..………….…..Ⅰ 英文摘要………………………………………………………………………….…...Ⅱ 绪论……………………………………………………………….……………….…1 1.1 前言…………………………………………………………………………..…….……..1 1.2 D类功率放大器目前水平……………………………………………………………….2 第二章 D类放大器的放大电路设计……………………………………………….……3 2.1 D类放大器的基本结构………………………………………………………………….3 2.2 D类放大器的设计思路………………………………………………………………….4 2.2.1 基本设计方案……………………………………………………………………….4 2.3 D类放大器的工作原理………………………………………………………………….7 2.4 宽带调制（PWM）………………………………………………………………………..11 2.5 改进全桥PWM方案的模拟实现方法……………………………………………….…..12 2.6改进全桥PWM方案的数字实现方法……………………………………………………13 第三章 其他辅助电路设……………………………………………………………………..14 3.1 短路保护电路…………………………………………………………………………...…14 3.2 噪声和干扰屏蔽设计…………………………………………………….…….……….....15 3.2.1噪声和干扰………………………………………………………………..………..15 3.2.2 屏蔽的基本原理………………………………………………...…….….………15 第四章 进一步改进措施…………………………………………………………..…..…….17 4.1尽量减少静态功耗和动态功耗………………………………………………..………….17 第五章 总结……………………………………………………………………………………18 参考文献…………………………………………………………………………..…..……......19 致谢………………………………………………………………………………………………20 附录……………………………………………………………………………….……………...21 摘 要 本文设计了一种以100W功率放大器为核心的D类功率放大器。本设计采用全桥改进PWM方案实现的D类放大器具有效率高、降低滤波器要求等特点。采用CPLD实现改进的全桥PWM方案，并结合DSP实现串并转换、数字插值和噪声整形等处理，可实现高保真的音频放大器。设计的数字功率放大器可对数字音源输出的音频信号进行直接放大，为数字音源和功率放大的整合提供了完整的解决方案。它改进了PWM方案，输出开关管采用高速MOSFET管，连接成互补对称H桥式结构，平均效率可达到85%左右，兼有输出1：1双变单电路，噪声和干扰的屏蔽方法，此外还有输出短路保护。其工作原理为：输入信号与三角波信号在通过比较器比较之后，产生一个脉冲信号，送至前置放大电路，再经过低通滤波器滤波，以保证输出信号在一定的带宽内。D类放大器之所以能实现这样的效率，是因为D类放大器与开关模式电源的工作方式相似，其中输出MOSFET要么是完全启动(饱和)，要么是完全关闭(切断)的。因而可以减小晶体管的功率损耗，增加放大器的效率。 关键词：D类功率放大；改进PWM方案；短路保护；干扰屏蔽 Abstract The designed D class amplification has characterized of improver full PWM program high efficiency and lower filter requirements. CPLD realization of adopted full-bridge PWM improvement program, and combined with the realization by DSP SERDES, digital interpolation and noise shaping processing, etc., can be realized by high-fidelity audio amplifier. Digital power amplifier designed for digital audio output to the audio signal directly to amplification, digital sound and power was amplified to provide a complete integrated solution. It has been improved PWM program, the output pipe by using high-speed switching MOSFET tubes, are connected into a complementary symmetric H-bridge structure, the average efficiency of around 85% can be achieved by the combination of 1:1 two-change single-output circuits, noise and interference by shielding methods, in addition to short-circuit protected output. Its working principle is: the input signal with the triangular wave signal is compared by comparing the device after a pulsed signal to the preamp circuit, and then, after filtering low-pass filter to ensure that the output .signal within a certain bandwidth. Class D amplifiers can achieve this because of efficiency, because the D-type switch-mode power amplifier with the work, which is similar or the output MOSFET is fully activated (saturated), or is completely closed (cut off) of the. Transistors can be reduced and thus the power loss and increase efficiency by amplifier. Key Words: D class power amplification；Programs to improve the PWM ；pulse-width modulation；current overload protection；
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智能高速球控制系统的设计
目录 摘要 ……………………………………………………………………………………………… I Abstract………………………………………………………………………………………… Ⅱ 前 言 ……………………………………………………………………………………… 1 课题的任务和要求 …………………………………………………………………… 1 智能高速球的基本结构……………………………………………………………… 1 智能高速球的运行原理……………………………………………………………… 1 高速智能球的现状及发展趋势……………………………………………………… 2 系统总体设计方案 …………………………………………………………………… 5 控制器 ………………………………………………………………………………… 5 电动机……………………………………………………………………………………7 总体方案……………………………………………………………………………… 7 系统硬件设计 ………………………………………………………………………… 8 AT89C51 ……………………………………………………………………………… 8 AT89C51控制器概述……………………………………………………………… 8 AT89C51的特点 ………………………………………………………………… 8 高速球控制板单芯片方案框图………………………………………………… 12 步进电机………………………………………………………………………… 13 步进电机型号………………………………………………………………… 13 步进电机性能参数……………………………………………………… 14 系统软件设计 ………………………………………………………………………… 15 AT89C51编程控制步进电机……………………………………………………………15 结束语 ……………………………………………………………………………………23 致谢 …………………………………………………………………………………………24 参考文献 …………………………………………………………………………………25 摘要 智能高速球作为监控系统的前端，是一种很有发展前途的产品。这在西方发达国家广泛应用高速球的情况上就可以得到很好的证明，可以肯定在不久的将来国内市场对高速球会有很大的需求。高速球作为一种新生事物，它的出现，才是“监控”的功能得以全面的拓展。因此，本论文认为有必要对高速球控制系统的结构与原理进行了解，掌握，在理解的基础上改善高速球的性能，以致达到更好的监控效果。 论文主要介绍以51单片机来实现高速球的监空功能。具体思路是以51单片机来控制步进电机，以步进电机来带动高速球内置摄相头的转动，包括水平方向的左转，右转和垂直方向上转，下转。论文涉及了相应的硬件设计和软件程序编写。 关键词： 高速球，51单片机，步进电机 Abstract High speed dome,which is the front part of a monitor system,is a hopeful product.This idea can be well proved by the truth that this kind of domes are widely applied in the west developed countries,and it is strongly believed that domestic market will require these products in a large account before long.The high speed dome is a new object in our country now,whose appearance brings the possibility to well develop the function of the monitor system.So,it’s necessary to learn and master the structure and theory of the dome,and finally we can add new functions to the domes to fulfill better the needs of customs. This essay mainly discuss a way to realize the dome’s function based on MCU-51,and put up simple introductions of the hardware designment and the program code involved.It’s concret thought is to use MCU-51 to control the movement of the step-take electric machineries,and then the step-take electric machineries promote the camera to move,which should complete actions of rolling around about 360 degrees in the level direction and of overturning about 180 degrees in the vertical one. Key words： high speed dome, MCU-51, step-take electric machinery,
