零磁通型高精度微电流传感器  

A High Precision Low Current Sensor based on Electronic Compensating Zero Flux Principle

作　　者：单平[1] 罗勇芬[1] 李彦明[1] 徐大可[2] 曹俊岭[2] 

机构地区：[1]西安交通大学,西安710049 [2]国电南京自动化股份有限公司,南京210003

出　　处：《高电压技术》2002年第5期28-29,52,共3页High Voltage Engineering

摘　　要：研制了一种用于高压电容性设备在线监测的穿心式高精度微电流传感器。它基于电子补偿原理 ,通过对激磁电流的补偿 ,使传感器近似工作在“零磁通”状态。测试表明 :补偿收到了良好效果 ,角差稳定在± 1.5′以内 ,比差 <1‰。In this paper a type of low current sensor based on zero flux compensation is described. The current sensor is specially designed for on line monitoring of HV apparatus. The circuit in the sensor can track the variation of magnetizing current and compensate it automatically to assure the magnetic core working in 'zero flux' condition. The test of current sensor shows that the design get satisfactory results. Angular difference of sensor is ±1.5' and relative scale difference is less than 1/1000.

关 键 词：零磁通型高精度微电流传感 抗电磁干扰 测试 校验 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]