电梯PLC控制系统的模拟设计.doc

摘 要 随着城市建设的不断发展，高层建筑不断增多。电梯作为高层建筑中垂直运行的交通工具已与人们的日常生活密不可分。传统的电梯控制系统采用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。 在我国经济的高速发展，微电子技术、计算机技术和自动控制技术也得到了迅速发展，交流变频调速技术已经进入一个崭新的时代，其应用越来越广。随着人们对电梯要求的提高，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。本文在已有的通用变频器的基础上，采用PLC对电梯进行控制，通过合理的选择和设计，提高了电梯的控制水平，并改善了电梯运行的舒适感，使电梯达到了较为理想的控制效果。 关键词：电梯；PLC控制；变频调速；舒适感 Abstract Along with the urban construction development unceasing, the high rise building increases unceasingly too. Elevator as a vertical transport operation in the high rise building, it was closely related to the peoples daily life. The traditional elevator control system uses logic of the relay to control circuit, this kind of controls easily to be crash, maintains inconveniently, the movement life is short, and that occupying a large area of space, it being eliminated gradually. With the development of the economy ,microelectronic technology、computer technology and the automatic theory are developed rapidly，the AC variable frequency technology has been in a new state. Its application is becoming more and more widely. The elevator has developed quickly with the improving requirement of the people. Its dragging technology has developed from DC timing to AC variable frequency timing and its logic control-relay control also has been replaced by PLC，the article is based on the now-being general frequency converter，using PLC to control the elevator，the reliability is improved and the feeling of comfort is better through the reasonable selection and design，so the elevator of control is more ideal. Keyword: elevator; PLC control; frequency conversion timing; feeling of comfort 2