后动作优先设备控制电路设计--课程设计————————————————————————————————作者：————————————————————————————————日期：后动作优先设备控制电路设计摘要：随着科学技术的不断发展、生产工艺的不断改进，特别是计算机技术的应用，新型控制策略的出现，不断改变着电气控制技术的面貌。在控制对象上主要是对电机的控制。本次设计对多种电气器件的综合运用，使设计达到控制要求。为了能实现电机的后启动优先并保证前面已经工作的电机自动停止，设计时有意添加了互锁环节。考虑到电机在工作过程中可能会出现过载，所以在控制线路串接了热继电器，并且只对三台电机中所过载的加以停车控制。此外还顾及到线路中有可能出现短路，故在主电路和控制电路都加了熔断器。整个线路的设计遵守简便，完整和功能完善的基本原则。关键词：电气控制技术，后启动优先，停车，过载，互锁，热继电器，熔断器。引言伴随着电气控制技术的迅猛发展，在控制原理上，从单一的有触头硬接线继电器逻辑控制系统发展到以微处理器或微型计算机为中心的网络化自动控制系统。近来国内外的控制大都以PLC实现控制，此次的设计的题目网络上也有相应对应，但是却都是以PLC编写的程序为主。而我们实验室又不便提供，所以我们就采用有触头硬接线继电器逻辑控制系统来设计的。目录摘要引言1设计方案介绍·······························································41.1设计题目及要求·····························································41.2设计分析···································································41.3设计方案概述·······························································42单元电路的介绍·····························································62.1电机的选择·································································62.2熔断器的选择·······························································62.3热继电器的选择·····························································82.4主线路线、控制线路及地线的线径选择·········································92.5接触器的选择······························································102.6刀开关的选择······························································102.7按钮的选择································································112.8元器件配置清单表··························································123总电路····································································133.1方案一····································································133.2方案二···········································...
