基于MCP3911的充电桩直流电表设计  

A fesign of DC energy meter based on MCP3911

作　　者：景小军 JING Xiaojun(product development department,Mianyartg Weibo Electronics co.Jtd,Mianyang 62100,China)

机构地区：[1]绵阳市维博电子有限责任公司技术中心,四川绵阳621000

出　　处：《自动化与仪器仪表》2021年第2期165-168,共4页Automation & Instrumentation

基　　金：四川省科技计划资助项目(No.2018TZDZX0002)。

摘　　要：直流电表是直流充电桩的重要部件,负责电能的计量,有巨大的市场需求。针对该需求,介绍了一种充电桩直流电表的软件和硬件的设计方案,包括设计的依据和技术要求,其中硬件方案包含A/D转换、处理器、实时时钟、数据存储、显示单元的设计方案,软件方案包含系统的主软件框架、电压电流功率的算法和电能采集的快速算法(采用该算法可以减少电能数据的80%运算量,降低对处理器的要求)、提高电能数据存储可靠性的算法、以及使用大容量FLASH作为事件记录存储器的算法,该算法同样适合用来存储电能数据,可以用FLASH替代铁电存储器,降低硬件成本。最后给出了样机验证的测试项目、测试结论和部分测试记录。Dc electric energy meter is important part of Dc charging pile,with measuring Dc electric energy.So introducing a software and hardware designed about Dc electric meter.The hardware designed included A/D converting,MCU,RTC,data storage,and display unit.The software design included algorithm of voltage,algorithm of current,algorithm of power,and a rapid algorithm of electric energy(it can reduce 80%calculating work of MCU,decrease demand about MCU),algorithm of enhancing energy data storage reliability,algorithm of event storage in FLASH,the algorithm can be applied to storage electric energy,so replaced FRAM by FLASH and reduced cost.At the last,shows the test items,test results of the test report.

关 键 词：电表 测量 算法 

分 类 号：E911[军事]