基于LM339电压比较器的交流过零检测电路设计  

Design of AC Zero Crossing Detection Circuit Based on Voltage Comparator LM339

作　　者：巩银苗 鲁西坤 徐帅 范秋凤[1] 卢春华[1] GONG Yinmiao;LU Xikun;XU Shuai;FAN Qiufeng;LU Chunhua(Electronic Information and Electrical Engineering Department,Anyang Institute of Technology,Anyang 455000,China;Dancheng Power Supply Company,State Grid of Henan,Dancheng 477150,China)

机构地区：[1]安阳工学院电子信息与电气工程学院,河南安阳455000 [2]国家电网河南郸城县供电公司,河南郸城477150

出　　处：《煤矿机电》2018年第5期33-36,39,共5页Colliery Mechanical & Electrical Technology

摘　　要：针对交流电路过零检测电路存在结构复杂、过零点检测不准确、编程繁琐等问题,设计了一种基于LM339的硬件结构简单的过零检测电路。通过仿真软件Mulisim对该设计电路进行了仿真,实验证明了该方案过零检测的可行性、稳定性和可靠性,可直接作为交流电路中CPU的过零信号。Aiming at the problems of AC cilsuit zero crossing detection circuit such as complex structure, zero crossing detection and cumbersome programming, a zero crossing detection circuit with simple hardware structure based on LM339 was designed. The design circuit was simulated by simulation software Mulisim, and the feasibility, stability and reliability of zero crossing detection were proved by experiments, which can be used as zero crossing signal of CPU in AC circuit directly.

关 键 词：交流电路 过零检测 比较器LM339 仿真 

分 类 号：TN773[电子电信—电路与系统] TP212[自动化与计算机技术—检测技术与自动化装置]