一种基于FPGA的过流保护电路  

FPGA Based Over current Protection Circuit

作　　者：朱耀国[1] 屈盼让 肖鹏[1] ZHU Yao-guo;QU Pan-rang;XIAO Peng(Xi′an Aeronautics Computing Technique Research Institute,AVIC,Xi′an 710000,China)

机构地区：[1]航空工业西安航空计算技术研究所,陕西西安710000

出　　处：《航空计算技术》2022年第1期108-109,114,共3页Aeronautical Computing Technique

基　　金：航空科学基金项目资助(2016ZC31004)。

摘　　要：针对航空28V/开功率输出电路的过流保护的需求,提出了一种基于FPGA的过流保护电路。电路通过采样电阻与运算放大器将电流信号转换为电压信号,并将获取的电压信号通过比较器与电压基准比较产生过流信号;FPGA通过对过流状态进行监测,根据热量累积结果及时关断28V/开功率输出电路,避免短路故障的持续与蔓延,并可根据上位机指示恢复供电。电路具备高安全、高可靠与小型化的特点。According to the over current protection requirement of aviation 28V/Open power out circuit,this paper introduces a FPGA based over current protection circuit.This circuit transfers the current signal into voltage signal by sampling resistor and operational amplifier,and generates over current signals by comparing the voltage signal with voltage references through comparator.By monitoring the over current status,the FPGA will calculate the heat accumulation,switch off the power supply in time,thus preventing the sustaining and spreading of over current faults.The FPGA can also recover the power supply by the order of upper computer.This circuit has the advantage of high security,high reliability and miniaturization.

关 键 词：短路保护 FPGA 28 V/开 监测 

分 类 号：TP334.7[自动化与计算机技术—计算机系统结构]