摘要
直流大电流传感器由于缺少高准确度的万安量级的直流恒流源,一直存在量值溯源的难题。为保证输出电流的准确稳定,本文研究设计了由18个深度负反馈回路600A恒流源并联而成的万安级标准直流恒流源。同时,在其内部集成大功率二极管作为固定负载,利用单向导通性,确保单个恒流源输出电流的独立稳定。结果表明:该装置电流准确度优于0.01%,电流稳定度优于10ppm/2min,满足工业生产中高精度大量程电流传感器的校准需求。
Due to the lack of high accuracy constant current source of 10,000 amperes,it is always difficult to trace the magnitude of DC high current sensor.In order to ensure the accuracy and stability of output current,this paper studies and designs a 10,000-amp standard DC constant current source composed of 18 deep negative feedback loop 600A constant current sources in parallel.At the same time,it integrates a high-power diode as a fixed load,and makes use of single pilot connectivity to ensure the independent stability of the output current of a single constant current source.The results show that the current accuracy of the device is better than 0.01%and the current stability is better than 10ppm/2min,which can meet the calibration requirements of high-precision and large-range current sensors in industrial production.
作者
余晓曦
郝丹
刘缙林
肖鹏
YU Xiaoxi;HAO Dan;LIU Jinlin;XIAO Peng
出处
《计量与测试技术》
2023年第11期20-22,26,共4页
Metrology & Measurement Technique
基金
四川省重大科技专项项目(项目编号:2018TZDZX0002,2019ZDZX0034)
四川省科技项目(项目编号:2018GFW0187)
四川省基本科研业务费(项目编号:2023JDKY0006)。
关键词
恒流源
零磁通电流传感器
二极管
汇流排
constant current source
zero flux current sensor
diode
busbar
