文档介绍：plc控制电梯论文
摘要
随着科学技术和社会经济的发展,高层建筑已成为现代城市的标志。电梯作为垂直运输工具,承担着大量的人流和物流的输送,其作用在建筑物中至关重要。与此同时,人们对电梯的性能要求也越来越高,比如可靠性,操作方便,舒适性,低噪音,低能耗等等。随着人们对其要求的提高,电梯得到了快速发展,其拖动技术已经发展到了调频调压调速,其逻辑控制也由PLC代替原来的继电器控制。采用PLC对电梯进行控制,通过合理的选择和设计,能够有效的提高电梯的控制水平,极大地改善了电梯运行的舒适感,使电梯的控制达到了比较理想的控制效果。
本文在介绍电梯基本结构的基础上,阐述了电梯的拖动原理和控制原理,重点分析了电梯系统设计中如何用PLC实现控制系统并编制控制程序,研究并提出了基于PLC和变频器的电梯控制系统的实现方案,,用变频器调速的电梯控制系统。利用三菱PLCFX2N-64来设计5层电梯控制系统。
关键词:电梯;控制系统;PLC;变频器
ABSTRACT
With scientific and technological and socio-economic development, high-rise buildings have e the hallmark of modern cities. As vertical lift equipment, a lot of people bear the transportation and logistics, its role in building essential. At the same time, it has to lift the performance requirements are also increasing, such as reliability, easy to operate, comfortable nature, low noise, consumption, and so on. But the elevator as an important traffic in skyscraper,it also has developed quickly with the improving requirement of the People. It’s dragging technology has developed from DC timing to AC variable frequency timing and It’s logic control-relay control also has been replaced by PLC. using PLC to control the elevator,the reliability is improved and the feeling fort 15 better through the reasonable selection and design,so the effect of control is more ideal. In order to meet fort, improve transporting efficiency and reach the right floor, the given curve of an elevator is a key point. Most of people’s sensitivity on changing speed is about acceleration movement. Comfort means acceleration and deceleration on smoothness. To acquire fort, the starting and braking curves design of the elevator posed of two s-curves and one beeline. Through adjusting the acceleration time and that of the s-curve’s, ideal starting and braking curves are gained.
This paper, based on the introduction of the elevator's basic structure, expatiates the drive and control principle of elevator, and analyzes how to use the PLC t