一种用于实验教学的三相交流电源保护电路设计  

Design of three phase AC power supply protection circuit for experimental teaching

作　　者：张涛 黄大刚 ZHANG Tao;HUANG Dagang(College of Artificial Intelligence,Nankai University,Tianjin 300350,China)

机构地区：[1]南开大学人工智能学院,天津300350

出　　处：《实验室科学》2023年第2期38-41,共4页Laboratory Science

基　　金：2021年教育部高等教育司第一批产学合作协同育人项目(项目编号:202101333023);南开大学2021年本科实验教学改革项目(项目编号:21NKSYSX10)。

摘　　要：电路类实验中380V电压等级的强电类实验占较大比重,实验台加装限流保护电路是非常必要的。设计方案对串联白炽灯的方法进行改进,选用交流接触器、常开开关、常闭开关,工作状态分“过流检测”和“正常供电”两种,消除了三相电路实验教学中经常遇到错接电路引起电源短路、过流现象,并且能正常进行常规实验,测量实验数据。本方案设计的电路使用安全稳定,效果良好。In circuit experiments,380V strong voltage experiments account for a large proportion,so it is necessary to install current limiting protection circuit on the experiment table.The design scheme improves the method of connecting incandescent lamps in series.It selects AC contactor,normally open switch and normally closed switch.The working state is divided into“over current detection”and“normal power supply”.It eliminates the phenomenon of short circuit and over current caused by wrong connection in three-phase circuit experimental teaching.And it can carry out normal experiments and measure the experimental data.The circuit designed in this scheme is safe,stable and effective.

关 键 词：三相交流电源 限流保护 交流接触器 

分 类 号：TN7[电子电信—电路与系统]