基于plc控制的三层电梯变频设计毕业论文.docVIP

本科毕业设计说明书 教学实训电梯控制系统模型的设计 TEACHING AND TRAINING DESIGN OF THE ELEVATOR CONTROL SYSTEM MODEL 学院（部）电气与信息工程学院 专业班级： 电气08-6班 学生姓名： 毛清东 指导教师： 高俊岭副教授 2012 年 6 月 日 教学实训电梯控制系统模型的设计 摘要 电梯是一种重要的垂直交通运输设备，又是比较复杂的机、电结合一体的大型工业产品，既有完善的机械专用构造，又有复杂的电气控制部分。 随着科学技术的不断进步，电梯技术逐渐由交流感应式电动机拖动、双速电机拖动、直流调压电机拖动，继电器—接触器控制，发展到现在的计算机或PLC控制的交流变频电机拖动系统，这期间经历100多年的历史。 电梯的电气系统由拖动系统和控制系统两部分组成。传统的电气控制系统采用的继电器逻辑控制由于触点多、故障率高、可靠性差、体积大等缺点，正逐渐被淘汰。功能变化灵活，编程简单，故障少，噪音低维修保养方便，节能省工，抗干扰能力强，控制箱占地面积少。TEACHING AND TRAINING DESIGN OF THE ELEVATOR CONTROL SYSTEM MODEL ABSTRACT The elevator is a kind of important vertical transportation equipment, is also more complex machines, electric combined with one of the major industrial products, not only improve the machinery for construction, and the complex electric control part. With the progress of science and technology, elevator technology gradually by the AC induction motor drive, double speed motor drive, DC voltage motor drive, relay contactor control, now to the development of the computer or PLC control of AC variable frequency motor drive system, this period after 100years. Elevator electrical system from the drive system and control system is composed of two parts. The traditional electric control system using relay logic control due to the contact number, high failure rate, low reliability, large volume and other shortcomings, are gradually being phased out. In these circumstances, the design of the main use of PLC control elevator has stopped, in the experiment simulated elevator operation. PLC control compared with the traditional control mode has many advantages, there is nothing comparable to this, function in a flexible, simple programming, less failure, low noise. Convenient repair and maintenance, energy saving, strong anti-interference ability, control box covers an area of less and so on. KEYWORDS：elevator，programmable logic controller，frequency converter,controllability 目录 摘要 I ABSTRACT II 1绪论 1