双时基NE556定时器在三相电动机正反转控制电路中的应用  

Application of Dual Timebase NE556 Timer on the Control Circuit of Positive and Negative Rotation for Three-phase Motors

作　　者：谭琦耀 TAN Qi-yao(Nanning College for Vocational Technology, Nanning, Guangxi, 530008, China)

机构地区：[1]南宁职业技术学院,广西南宁530008

出　　处：《工业技术创新》2017年第1期140-142,共3页Industrial Technology Innovation

基　　金：应用现代电子技术改造传统机床控制电路的实践与研究(2015年广西高校科学技术研究项目;编号:KY2015LX627)

摘　　要：原有电动机控制电路在传统机床中易发生故障,需技术改造。基于单时基NE555定时器工作原理,设计了由双稳态触发电路、两个单时基NE555定时器组成的双时基NE556定时器,最终实现双稳态触发电路、双时基NE556定时器与双向晶闸管等构成的三相电动机正反转控制电路。以无触点控制方式达到了控制电动机启动、停止、正反转等功能,同时能够实现断相、过载保护。技术改造项目提高了机床安全性能。Classic control circuit for motors cannot guarantee users’experience of traditional machineries,so its technological transformation is urgently needed.A bistable tigger circuit as well as a dual timebaseNE556timer composed of two single timebase NE555timers are designed based on the working principleof NE555,and ultimately,a positive and negative rotation for three-phase motors is established by thecombinations of bidirectional thyristor and above components.Targets including start,stop and positive/negative rotation are achieved by means of non-contact control mode,and moreover,protections onphase failure and overload are also realized,indicating that a successful technological transformation forimproving production efficiency is obtained.

关 键 词：双时基NE556定时器 双稳态触发电路 双向晶闸管 无触点 断相保护 过载保护 

分 类 号：TN46[电子电信—微电子学与固体电子学]