一种高精度稳压直流充电电路的设计  

Design of a High Precision Direct-current Charging Circuit

作　　者：高伟[1] 施吕蓉[2] GAOWei;SHI Lv-rong(School of Electrical Engineering;Basic Teaching Department,Wuhu Institute of Technology,Wuhu,Anhui 241000)

机构地区：[1]芜湖职业技术学院电气工程学院 [2]芜湖职业技术学院基础部

出　　处：《西昌学院学报（自然科学版）》2018年第4期75-77,共3页Journal of Xichang University(Natural Science Edition)

基　　金：2016年度安徽省自然科学研究重点项目(KJ2016A760)

摘　　要：本系统主要采用可调的LM2596T芯片为核心元件进行直流稳压;当输入电压从175V变化到255V,与此同时负载由空载变化到满载的条件下,电压调整率低于0.2%;当输入电压稳定在220V,充电电流从0变化到2A时,最高负载调整率仅为0.4%;采用STM32F103FC8T6单片机控制LCD12864,实时显示充电电压和充电电流,采集电流时用采样电阻两端的电压比电阻实现,电压放大由低噪声运放OP07完成;当充电电压超出设定误差范围(可人为设定),充电电路自动断开并报警,断电后自动保存充电电压和充电电流数值,待恢复后显示该值。The system mainly adopts the adjustable LM2596T chip as the core element to carry out the dc stabilizer.When the input voltage varies from 175 V to 255 V,at the same time the load is changed from empty to full load,and the voltage adjustment rate is less than 0.2%.When the input voltage is stable at 220 V and the charging current changes from 0 to 2A,the maximum load adjustment rate is only 0.4%.Using STM32F103FC8T6 microcontroller LCD12864,real-time display shows charging voltage and charging current.The voltage ratio on both ends of the sampling resistance is realized by sampling resistance,voltage amplification is completed by low noise transport OP07.When charging voltage exceeds the range of error(customizable),charging circuit automatically will disconnect and give an alarm.The charging circuit will automatically disconnect and alarm.After power off,the value of charging voltage and current will be automatically saved and displayed after recovery.

关 键 词：LM2596T STM32F103FC8T6 LCD12864 负载调整率 电压调整率 

分 类 号：TN702[电子电信—电路与系统]