基于新型PCB罗氏线圈的短时缓变大电流传感器

Transducer applied to measure heavy and slowly-varying current with short-time based on new PCB Rogowski coil

本文设计了一种基于新型PCB罗氏线圈的电流传感器,用于复杂电磁环境中短时非周期缓变大电流测量。该传感器由双面对称布线且设置回线的强抗干扰性PCB罗氏线圈、带调零单元的无惯性环节积分电路构成。罗氏线圈感应短时持续电流的上升沿或下降沿来获取电流变化率信号,经积分电路保持信号并实现短时持续的直流或低频缓变电流的测量。实测结果证明了本文制作的传感器的有效性与准确性。

In this paper,a new PCB Rogowski coil transducer is designed to measure the non-periodic current with large amplitude in the complex electromagnetic environment.The transducer consists of the sensor head and the processing circuit.The sensor head is the PCB Rogowski coil with symmetric double-printed imprints and returning turn,also with high anti-interference property.The processing circuit is the integration circuit with zeroing unit but without the inertia segment.PCB Rogowski coil gains the change rate of the measuring current by inducing its rising and trailing edges.Meanwhile the integration circuit can inhibit the signal to achieve the recondition of the current.The experimental results show the validity and accuracy of the newly-designed transducer.