【摘要】 为了提高用于小电流测量的电子式电流互感器的精度,必须对传感头进行优化,主要解决传感头的相位补偿问题。针对用于小电流测量的电子式电流互感器的特点,对传感头部分所产生相位差进行研究,根据研究结果设计了一种以全通滤波器为基础的相位补偿电路,并给出仿真结果和试验结果。结果表明其精度能达到0.2级。更多还原

【Abstract】 In order to improve the precision of electric current transducer used to measure small current,the sensing head must be optimized,mainly to resolve difficulty of phase compensation for sensing head.Aiming at the characteristic of electric current transducer used to measure small current,the phase error produced by sensing head is researched,according to result,an applied circuit based on all-pass filter to compensate phase error is designed,and emulation and examination results are given.The result indacates that its precision can meet 0.2 level.更多还原