采用PCB平面型空心线圈的电子式电流互感器性能分析

Performance Analysis on Electronic Current Transformer Based on PCB Planar-Type of Air Core Coil

分析了印制电路板(printed circuit board,PCB)平面型空心线圈的结构与原理,对PCB电子式电流互感器的频率特性、稳态特性及暂态特性进行了仿真分析与试验研究,提出了数字式电流互感器的结构。结果表明:PCB电子式电流互感器测量范围大、工作频带宽、暂态响应快、稳态性能好且具有良好的线性度,适合小电流(100A以下)测量。

The structure and principle of printed circuit board （PCB） planar-type of air core coil are analyzed; simulation analysis and experimental investigation of frequency characteristic, steady-state characteristic and transient characteristic of PCB electronic current transformer are carried out; then the structure of digital current transformer is given. Simulation and experimental results show that PCB electronic current transformer possesses such features as wide measuring range, wide working frequency band, fast transient response, good steady-state performance and good linearity, so it is suitable for the measurement of small current lower than 100A.