C650卧式车床电气控制系统的PLC改造毕业论文目录前言...............................................................1第一章C650卧式车床的改造介绍.......................................21.1C650型卧式车床简介............................................21.2C650卧式车床改造主要容........................................31.3C650卧式车床改造要求..........................................4第2章总体方案设计.................................................52.1方案的提出与比较..............................................52.2方案的选择与论证..............................................62.2.1PLC介绍...................................................62.1.2C650改造方案的选择........................................82.1.3PLC控制系统与电气控制系统的比较...........................8第三章控制系统的总体设计..........................................103.1系统工作流程分析.............................................103.2PLCI/O分配表...............................................103.3PLC的选择....................................................113.4PLC的I/O电气接线图..........................................13第四章C650卧式车床控制系统硬件设计................................144.1主电路分析....................................................154.2控制电路分析..................................................154.2.1主电动机点动控制分析.....................................154.2.2主电动机的正反转控制分析.................................154.2.3主电动机反接制动分析.....................................164.2.4快速电动机与冷却泵电动机控制分析.........................164.3辅助电路分析.................................................174.3.1照明电路和控制电源分析...................................174.3.2电流表保护电路...........................................174.4电动机选择...................................................174.5系统元器件的选择.............................................184.5.1交流接触器的选择.........................................184.5.2中间继电器的选择.........................................184.5.3保护电器的选择...........................................184.5.4控制开关电器的选择.......................................194.5.5速度继电器选择...........................................20第五章C