[其它]毕业设计.doc

论 文 摘 要 随着城市建设的不断发展，高层建筑不断的增多。电梯作为高层建筑中垂直运行的交通工具已于人们的日常生活密不可分。因此必须努力提高电梯系统的性能，保证电梯的运行既高效节能又安全可靠。传统的电梯控制系统的是继电器逻辑控制电路，这种控制易出故障，维护不便，运行寿命短，占地空间大，正逐步被淘汰。 为了提高自动控制系统的可靠性和设备的工作效率，设计了一套一PLC为核心控制器自动控制系统，用来取代以往的较复杂的继电器-接触器控制。系统的核心部分（控制部分）使用了日本三菱公司生产的FX2N-64MR型PLC，因为核心控制部分采用的软件程序控制，从而在保证电梯的正常运行这个要求的情况下，大大提高了电梯故障检查与维修的方便性和容易性，同时还克服了手动操作所带来的一些人为干扰因素，取得了良好的经济效益和社会效益。 关键词：PLC； 电梯；逻辑控制；程序控制 Abstract With the continuous development of city construction, high-rise building increase continuously. Elevator high-rise buildings as a means of transport in the vertical run has been in peoples daily life is inseparable. It must strive to improve the performance of elevator systems, ensure the operation of the lift is energy efficient and reliable security. The traditional elevator control system logic of the relay to control circuit, this control easy fault, inconvenient maintenance, operation and short service life, large occupied space, is gradually being eliminated. In order to improve the automatic control system reliability and the work efficiency of the equipments, design a set of a PLC as the core controller of automatic control system, used to replace the complex relay - contactor control. The core part of the system ( control ) using the Mitsubishi FX2N-64MR produced PLC, because the core control part of the software program control, in order to ensure the normal operation of the lift this requirement, greatly improving the elevator fault inspection and repair convenience and easy, but also overcomes manual operation some of the factors, and achieved good economic and social benefits. Key words: PLC; elevator; logic control; process control 目录 前言1 电梯简介2 1.1 电梯的起源与发展2 1.2 电梯的分类3 1.3电梯的组成3 1.4电梯工作原理4 电梯控制系统的组成5 2.1 电梯的电力拖动部分5 2.2 电梯的电气控制部分5、6 三菱FX2N 系列可编程序控制器介绍7 3.1 三菱FX2N系列 PLC的主要特点7 3.2 PLC的性能指标和分类8 3.3 PLC系统的组成9 3.4　可编程序控制器的工作方式及编程语言10、11、12 3.5可编程序控制器与继电器、微机在电梯控制中的应用比较13 交流双速电梯的电气设计14 4.1　交流双速电梯的基本