【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‰。更多还原

【Abstract】 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.更多还原