电热水器内置漏电流检测电路改进的试验研究  

Experimental study on improvement of built-in leakage current detection circuit of electric water heater

作　　者：黄智 HUANG Zhi(Guangdong Vanward New Electric Co.,Ltd.Foshan 528305)

机构地区：[1]广东万和新电气股份有限公司,广东佛山528305

出　　处：《家电科技》2022年第4期66-69,共4页Journal of Appliance Science & Technology

摘　　要：漏电流检测一直是电热水器控制器及电热水器整机制造商特别关注的重点问题之一。针对目前电热水器内置漏电流检测中存在漏报率和误报率较高的问题,通过在原来内置漏电流检测电路基础上,增加直流偏置电路来提高电路的抗干扰能力,同时增加漏电流报警值调节电路来对漏电流的报警值进行偏差的校准,提高检测精度。基于上述方案搭建了新的内置漏电流检测电路,并在电热水器控制器上进行了试验研究论证。试验结果表明,应用该电路可以提高内置漏电流检测的抗干扰能力和检测精度,从而大幅度降低电热水器内置漏电流检测的漏报率和误报率。Leakage current detection has always been one of the key issues of electric water heater controller and electric water heater manufacturer.Aiming at the problem of high false alarm rate and false alarm rate in the current built-in leakage current detection of electric water heater,based on the original built-in leakage current detection circuit,the DC bias circuit is added to improve the anti-interference ability of the circuit,and the leakage current alarm value adjustment circuit is added to calibrate the deviation of the alarm value of leakage current and improve the detection accuracy.Based on the above scheme,a new built-in leakage current detection circuit is built,and experimental research and demonstration are carried out on the controller of electric water heater.The experimental results show that the application of this circuit can improve the anti-interference ability and detection accuracy of built-in leakage current detection,so as to greatly reduce the missed alarm rate and false alarm rate of built-in leakage current detection of electric water heater.

关 键 词：漏电流 直流偏置 检测 调节 

分 类 号：TM925.32[电气工程—电力电子与电力传动]