一种多功能信号隔离器的研究与应用  

Research and Application of a Multifunctional Signal Isolator

作　　者：唐赛 朱晶亮 龙小活 邹志强 徐冬 陈振哲 陈焱清 张临风 TANG Sai;ZHU Jingliang;LONG Xiaohuo;ZOU Zhiqiang;XU Dong;CHEN Zhenzhe;CHEN Yanqing;ZHANG Linfeng(Hunan Zhongke Electric Co.,Ltd.,Yueyang 414000,China)

机构地区：[1]湖南中科电气股份有限公司,湖南岳阳414000

出　　处：《电工技术》2023年第17期148-151,共4页Electric Engineering

摘　　要：信号隔离器是一种采用先进的数字化技术将输入信号进行隔离和转换后再输出的电子设备,对高频、低频共模脉动干扰信号具有很好的抑制作用,因此广泛应用于工业自动化领域。首先分析了传统磁电式原理信号隔离的主要应用场景和不足之处,然后采用安华高公司的线性光隔离芯片ACPL-C87B-000E设计一种能满足常规需求的多功能信号隔离器,并且给出该信号隔离器所具有的0~5 V转0~5 V、0~5 V转4~20 mA、4~20 mA转4~20 mA、4~20 mA转0~5 V四种转换形式的详细电路图。最后将四种信号隔离中的0~5 V转4~20 mA应用于电磁搅拌专用变频电源中逆变IGBT内核结温监测系统,证明了采用线性隔离光耦设计信号隔离器方案的可行性。Signal isolator is a kind of electronic equipment which uses advanced digital technology to isolate and convert the input signal and then output it.It has a good inhibition effect on the high frequency and low frequency common mode pulsating interference signal,so it has a wide range of applications in the field of industrial automation.This paper first analyzes the main application scenarios and shortcomings of the traditional magneto-electric principle signal isolation,and then uses the linear optical isolation chip ACPL-C87B-000E of Avago Technologies to design a multifunctional signal isolation device that can meet the conventional requirements.The signal has four conversion forms of 0~5 V to 0~5 V,0~5 V to 4~20 mA,4~20 mA to 4~20 mA and 4~20 mA to 0~5 V,of which the detailed circuit diagram is given.Finally,the 0~5 V to 4~20 mA of the four signal isolations is applied to the inverter IGBT core junction temperature monitoring system in the special frequency converter power supply for electromagnetic stirring,which proves the feasibility of using the linear isolation optocoupler to design signal isolator scheme.

关 键 词：多功能 信号隔离器 光隔离线性光耦 

分 类 号：TM933.14[电气工程—电力电子与电力传动]