降低微波炉供电线路中AFCI误动作的研究  

Research on Reducing AFCI′s Mis-operation for Microwave Oven

作　　者：余朋清 YU Pengqing(Panasonic Home Appliances Microwave Oven(SH)Co.,Ltd,Shanghai 201203,China)

机构地区：[1]上海松下微波炉有限公司,上海201203

出　　处：《仪表技术》2020年第8期31-33,36,共4页Instrumentation Technology

摘　　要：介绍电弧故障的特征及国外有关电弧故障分断器(AFCI)的检测和判别方法,深入解析了变频微波炉导致AFCI发生误动作的根本原因。同时根据微波炉工作时的电流过零点的波形及接收的信号强度指示(RSSI)波形的特点,对微波炉的滤波电路的参数进行改善,有效地消除了电流过零点附近的纹波噪音,降低了过零点的RSSI值,从而降低AFCI误动作的发生,对微波炉的设计提供了参考价值。This paper introduces the characteristics of arc fault, the detection and discrimination technology of Arc Fault Circuit Interrupter(AFCI). The AFCI mis-operation caused by inverter microwave oven is deeply analyzed. According to the characteristics of current zero-crossing waveform and Received Signal Strength Indication(RSSI)waveform, the parameters of noise filter circuit of microwave oven is improved and the ripple noise near the current zero crossing point is effectively eliminated. The RSSI value of zero-crossing is reduced, so the occurrence of AFCI mis-operation is down, which provides reference for the design of microwave oven.

关 键 词：电弧故障 AFCI 变频微波炉 RSSI 误动作 

分 类 号：TM925[电气工程—电力电子与电力传动]