PLC在矿井空压机控制系统改造设计中的应用机械CAD图纸.doc

本科毕业论文（设计） 论文题目：PLC在矿井空压机控制系统改造设计中的应用 学生姓名： 所在院系： 所学专业： 导师姓名： 完成时间：2013年 5月 28日 摘 要 针对矿井旧空压机控制系统中存在的体积庞大、接线复杂、机械触点多、排除故障困难、可靠性差、自动化程度低、浪费电能等缺陷,设计了一种基于先进PLC和变频器控制技术的矿井空压机控制系统,详细讨论了系统的结构、控制方案、工作原理、硬件与软件设计方法。该控制系统具有功能完善,运行稳定,可靠性高,便于维护,节能效果明显等特点,提高了生产效率和经济效益,具有很好的应用前景。同时该控制系统若配置相应的通信模块和上位计算机,可方便地组成集散式控制系统,对现场设备的运行状态进行监控,实现远程控制,提升企业生产的自动化程度。 关键词：矿井，空压机，PLC，变频器，压力检测 PLC in mine pit air compressor control system transformation design application Abstract The volume which exists in view of the mine pit old air compressor control system in is huge, the wiring complex, the mechanical electronic contact are many, the trouble clearing difficulty, the reliability are bad, the automaticity is low, flaws and so on waste waste, have designed one kind based on advanced PLC and the frequency changer control technology mine pit air compressor control system, discussed systems structure, the control plan, the principle of work, the hardware and the software design method in detail. This control system has the function to be perfect, the movement is stable, the reliability is high, is advantageous for the maintenance obviously, the energy conservation effect and so on characteristics, raised the production efficiency and the economic efficiency, has the very good application prospect. Simultaneously if this control system disposes the corresponding connection module and the superior computer, but composes the collection and distribution type control system conveniently, carries on the monitoring to field apparatuss running status, realizes the remote control, the automaticity which the promotion enterprise produces.. Keywords：Mine shaft, Air compressor, PLC, Frequency changer, Pressure examination 目 录 摘 要 I Abstract II 1 绪论 1 2 电机的调控技术的发展现状 1 3 电机调速方式 2 3.1 调速控制节能分析 2 3.2 常用的调速方式 3 3.2.1 变级对数调速 4 3.2.2 变频调速 4 3.2.3 可控硅串级调速 5 3.3 多台空压机恒压控制系统中的关键问题 6 3.4 本文的主要研究内容 6 4 变频调速恒压提供压缩空气系统能耗机理分析 7 4.1 离心式空压机及其工况点确定的研究 8 4.1.1 空压机分类: 8 4.1.2 空压机工况点分析 8