基于零磁通的双隔离高电压传感器设计与实现
Design and Implementation of Double Isolation High Voltage Sensor Based on Zero Flux
牟宏杰 1王阳 1许涛 1钟贻兵 1高明星1
作者信息
- 1. 山东航天电子技术研究所,山东 烟台 264003
- 折叠
摘要
传统霍尔电压传感器测量千伏级电压采用外接电阻转换成电流的方式,存在输入功率大和测量隔离度低的问题.基于此,设计了一种基于零磁通的双隔离高电压传感器.设计电阻阵列、仪表放大和运放双跟随匹配的U/I转换电路,降低输入功耗并精确传送测量电压;引入特殊耐高压设计的霍尔模块,对原次级磁场建立零磁通反馈,实现测量和输出隔离以及高精度线性转换;设计宽电压式DC-DC电源对内部高低压模块隔离供电.测试结果表明,传感器线性度优于 0.1％,精度优于0.2％,耐压达到 2 000 V,具有重要的工程价值.
Abstract
The traditional Hall voltage sensor can convert kilovolt level voltage into current by using external resistance,which has the problems of large input power and low measurement isolation.Therefore,a double isolation high voltage sensor based on zero flux is de-signed.A U/I conversion circuit with resistance array,instrument amplification and dual-follow mode operational amplifier is designed to reduce input power consumption and accurately transmit the measured voltage.The Hall module with special high voltage resistance is introduced to establish zero flux feedback for the primary and secondary magnetic fields,achieving measurement and output isolation as well as high-precision linear conversion.A wide voltage DC-DC power supply is designed to provide isolated power to internal high and low voltage module.The sensor test results show that the linearity is better than 0.1％,the accuracy is better than 0.2％,and the with-stand voltage can reach 2 000 V,which has significant engineering value.
关键词
电压传感器/双隔离/零磁通/U/I转换/电阻阵列Key words
voltage sensor/double isolation/zero flux/U/I conversion/resistance array引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据