计量学报2024，Vol.45Issue(5)：609-618,10.DOI:10.3969/j.issn.1000-1158.2024.05.01
100 V 输入宽频带电压比例校验系统研究
Research on 100 V Wideband Voltage Ratio Calibration System
摘要
Abstract
50 Hz～10 kHz voltage ratio calibration system based on digital acquisition device is proposed.The system is composed of voltage conversion unit and digital acquisition device.The channel switching technology is used to greatly improve the accuracy of voltage ratio with the digital acquisition device.The voltage conversion unit is composed of cascade inductive voltage divider,isolation transformer and high & low voltage precision voltage follower.In this part,the turn-back winding process and so on are proposed to reduce the additional error caused by the stray parameters and the iron core material,and a two-stage isolation transformer with twisted pair structure winding is designed.The amplitude error of the two-stage transformer within the 10 kHz range shall not exceed 5 × 10-6,and the phase error shall not exceed 10 μrad.Precise low-voltage and high-voltage composite voltage followers are designed to compensate the phase response by using the characteristic matching of the double-package operational amplifier,which significantly improves the phase characteristics of the voltage follower,within the 10 kHz range,the amplitude error of the follower shall not exceed 10 × 10-6,and the phase error shall not exceed 20 μrad.The measurement results indicate that the calibration system has high measurement accuracy,and the measurement deviation at 50 Hz is not greater than 1 × 10-6 and 1 μrad.Within the 10 kHz range,the ratio error deviation is not more than 80 × 10-6,and the phase error deviation is not more than 60 μrad,which can meet the voltage ratio error measurement requirements in different frequency scenarios.关键词
电学计量/电压谐波校准/电压比例/误差校验/感应分压器/电压跟随器Key words
electrical measurement/calibration of voltage harmonic/voltage ratio/error test/inductive voltage divider/voltage follower分类
通用工业技术引用本文复制引用
姜春阳,聂高宁,夏胜国,周峰,殷小东..100 V 输入宽频带电压比例校验系统研究[J].计量学报,2024,45(5):609-618,10.基金项目
国家重点研发计划(2022YFB2403800) （2022YFB2403800）
