目 录
1前 言....................................................................11 2正 文..........................................................12
2.1设计要求...................................................12 2.2总体设计...................................................13
2.2.1系统结构.............................................13 2.2.2系统配置.............................................13 2.2.3三相异步电动机正反转的PLC控制 ......................14
2.2.3.1三相异步电动机正反转PLC控制接线图............14 2.2.3.2三相异步电动机正反转PLC控制的梯形图、指令表...17
2.2.4三相异步电动机的起、制动PLC控制.....................17 2.2.5三相异步电动机的调速系统PLC控制.....................20 2.2.6三相异步电动机使用PLC控制优点.......................24 3系统调试...................................................25 4结论.......................................................25 5参考文献...................................................27 6附录.......................................................28 7谢辞.......................................................29