新型家用电弧故障断路器(AFCI)的开发

本文介绍电弧故障断路器（AFCI）的电路部分的技术开发，包括它的硬件和软件的基本实现方法及相关内容。通过电流互感器感应AC（交流）电流的大小和击触，然后用OP（运放）进行处理后。将信号再输入MCU（微控制器单元）进行A／D（模数转换）处理，MCu将采样数值进行分析。如果符合故障电弧的特性，MCU将发出断路器脱扣信号，使断路器断开。当然传统的过流、短路和漏电保护功能可方便地被集成，只要再增加一个电流互感器。

Exploiting of New AFCI for Home

The paper introduces technique development of circuit part of AFCI, including basic implementation ways and contents of hardware and software.AC current value and di/dt are induced through a current thansformer.Afier processed by OP, the signal is input into MCU for A/D converting, MCU analyses sampling data,if it accords with characteristics of fault are, MCU gives a signal for cireuit-breaker releasing.Of couse, protection for over-current,short circuit and leakage can easily be integrated if a current transformer added.