电梯自动控制系统毕业设计

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1、 摘 要 随着科学技术的发展、近年来，我国的电梯生产技术得到了迅速发展 .一些电梯厂也在不断改进设计、修改工艺。更新换代生产更新型的电梯，电梯主要分为机械系统与控制系统两大部份 ,着自动控制理论与微电子技术的发展，电梯的拖动方式与控制手段均发生了很大的变化，交流调速是当前电梯拖动的主要发展方向。目前电梯控制系统主要有三种控制方式 :继电路控制系统 (早期安装的电梯多位继电器控制系统 )、 PLC 控制系统、微机控制系统。继电器控制系统由于故障率高、可靠性差、控制方式不灵活以及消耗功率大等缺点，目前己逐渐被淘汰。微机控制 系统虽在智能控制方面有较强的功能，但也存在抗扰性差，系统设计复杂，一般维修

2、人员难以掌握其维修技术等缺陷 .而 PLC 控制系统由于运行可靠性高，使用维修方便，抗干扰性强，设计和调试周期较短等优点 ,倍受人们重视等优点，己成为目前在电梯控制系统中使用最多的控制方式，目前也广泛用于传统继电器控制系统的技术改造。 关键词 :PLC，电梯，控制系统 河南城建学院本科毕业设计（论文） Abstract II Abstract Along with sciences and technologys development, the recent years, our countrys elevator production technology obtained the rap

3、idly expand. Some elevator factory unceasingly is also improving the design, the revision craft. The renewal production renewals elevator, the elevator mainly divides into the mechanical system and the control system two major parts, along with the automatic control theory and microelectronic techno

4、logys development, elevators dragging way and the control method has had the very big change, the exchange velocity modulation is the current elevator dragging main development direction. At present the lift control system mainly has three control modes: Following electric circuit control system (ea

5、rly installment elevator many black-white control system), PLC control system, microcomputer control system. Because the black-white control system the failure rate is high, the reliability is bad, control mode not nimble as well as consumed power big and so on shortcomings, at present has been eliminated gradually. Keywords:PLC， elevator， control system