具有漏电保护的直流稳压电源设计  

Design of DC Regulated Power Supply with Leakage Protection

作　　者：吴年祥[1] 陈小林[2] 

机构地区：[1]中国地质大学机电学院,湖北武汉430074 [2]安徽国防科技职业学院机电工程系,安徽六安237011

出　　处：《兰州工业学院学报》2014年第6期21-26,共6页Journal of Lanzhou Institute of Technology

基　　金：安徽省省级质量工程特色专业(20101685);电工电子省级示范实验实训中心(20101687);安徽国防科技职业学院院级骨干教师科研项目

摘　　要：设计了一种基于STC89C52RC单片机的直流稳压电源及漏电保护系统.采用RLC分立元器件组成的串联型稳压电路对电压变化进行自动调整,使输出直流电压稳定,高侧测量电流并联监视器INA138采集电源电流信号,利用16位AD7705模数转换器将电流信号转换成数字信号,通过12864液晶屏上实时显示测量出的电压、电流、功率.实验表明该漏电保护直流稳压电源输出电压为5±0.02 V,输出额定电流为1 A,电压调整率和负载调整率都小于1%,系统误差较小,能够满足直流稳压电源及电网漏电保护的各项性能指标要求.In this paper, a STC89C52RC MCU based DC stabilized power supply with leakage protection function is designed. In this power supply, the series voltage regulator consisting of RLC separated devices can adjust automatically with fluctuation of voltage to ensure output DC voltage stable. Meanwhile Current monitor INA138 is used to sample current signal from power supply, and 16-bit AD7705 ADC is used to convert current signal into digital signal. Finally, the measured voltage, current, power are all displayed in screen which can display Chinese character. Experimental results show that output voltage from this power supply is around 5＋/-0.02, rating current is 1A, voltage regulation and load regulation is less than 1%, all this performance can meet demand from power supply and leakage protection.

关 键 词：漏电保护 模数转换器 单片机 液晶显示器 

分 类 号：TM44[电气工程—电器]