基于PLC的矿井提升机变频调速系统毕业设计.doc

基于PLC的矿井提升机变频调速系统设计 摘 要 本设计在原有的继电器—接触器电控系统的基础上，对提升机的电控系统进行了改进，改用PLC控制，与传统的继电器—接触器电控系统相比，调速时的能耗大大降低，运行效率也有很大的提高，而且减少了维修的成本。如果需要改变系统的装置，可以直接在计算机上相应的梯形图进行修改，不像传统的电控系统，需要改变很多继电器，接触器的接线，这在无形之中就节省了大量的劳动力和时间，进而提高了劳动生产率。 在矿井提升机控制系统研究中，采用变频器和可编程控制器相结合的方法，在使用过程中实现了变频调速，换向等功能，使运行更加平稳可靠。适应范围广，节能效果更加明显。通过对已改造的提升机设备进行调研以及相关文献的阅读可以看出PLC控制的变频调速提升机有明显的社会效益和经济效益。 关键词： 矿井提升机，变频调速， PLC  Mine Hoist Frequency Control System Design Based On PLC ABSTRACT This design in the original relays-contactor ?control?system?based on, on the basis of hoist electric control system is improved, and switch to PLC control, and the traditional relays-contact device than the electric control system, the energy consumption greatly reduced speed, efficiency also have greatly increased, and to reduce the maintenance cost. If need to change the system of the device, can be directly in computer on corresponding ladder diagram modified, unlike traditional electric control system, need to change a lot of relays, contact device wiring, this in the void will save a lot of labor and time, and improve the labor productivity. In the mine elevator control system study, based on frequency and programmable is combined with the method, in use process realized the frequency control, reversing, and other functions, make run more stable and reliable. The range is wide, the energy conservation effect more apparent. Through the reform of the hoist equipment has investigation and related literature reading can see the PLC control variable frequency speed regulation hoist has obvious social benefits and economic benefits. KEY WORDS: mine hoist，Variable frequency speed regulation，PLC目　录 前　言 1 1.1 课题概述 1 1.2 国内外矿井提升机研究现状与发展趋势 1 1.2.1 国外矿井提升机的现状 1 1.2.2 国内提升机的现状与发展趋向 3 1.3 本文研究意义 4 第1章 矿井提升机 1 1.1 科技名词定义 1 1.2 矿井提升机的组成 2 1.3 矿井提升机的分类 2 1.4 提升机电动机运行方式 3 1.5 提升机的受力情况 5 第2章 PLC简介 6 2.1 PLC的基本概念 6 2.1.1 PLC的基本结构 6 2.1.2 PLC的基本特点 7 2.2 PLC的选型 9 2.3 PLC的工作原理 10 2.4 PLC的外围接线及各部分细节 12 2.5 PLC的编程语言 12 2.6 梯形图的编程规则 13 第3章 变频器简介 14 3.1 变频调