PCB罗氏线圈电流传感器设计及抗干扰研究  

Design and anti-interference study of PCB Rogowski coil current sensor

作　　者：李海青 张文斌[1] 朱琳 Li Haiqing;Zhang Wenbin;Zhu Lin(College of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650504,China;Yunnan Electric Power Investment Green Energy Technology Co.,Ltd.,Kunming 650228,China)

机构地区：[1]昆明理工大学机电工程学院,昆明650504 [2]云南电投绿能科技有限公司,昆明650228

出　　处：《仪器仪表学报》2025年第1期65-74,共10页Chinese Journal of Scientific Instrument

基　　金：云南省科技厅科技计划(202104BN050011)项目资助。

摘　　要：针对罗氏线圈的带宽与其灵敏度和抗干扰能力之间存在权衡关系问题,提出了一种具有高带宽、高抗干扰、高灵敏度的有回线组合型PCB差分罗氏线圈。根据组合型PCB罗氏线圈的测量原理以及集总参数等效电路模型,分析了影响测量带宽的关键因素,在此基础上对组合型PCB罗氏线圈采用差分设计,并分析其抗干扰原理。利用有限元仿真软件模拟不同电磁场环境下的干扰情况,验证了有回线组合型PCB差分罗氏线圈具有高抗干扰特性。最后进行实验验证,结果表明,在1~100 A工频电流测量时,所设计的有回线组合型PCB差分罗氏线圈电流传感器灵敏度为3.46 mV/A,线性度为0.56%。在10~100A工频电流测量时,最大相对误差为1.73%。抗干扰能力测试中,该传感器显示出的最大相对误差变化为-0.39%,具有良好的抗干扰能力。通过对比实验可知该线圈能有效抵抗电场和磁场干扰,并扩展测量带宽而不降低其灵敏度。有更广泛的应用场景,提高罗氏线圈的通用性和灵活性。To address the trade-off between bandwidth,sensitivity,and anti-interference performance of the Rogowski coil,a combined PCB differential Rogowski coil with high bandwidth,enhanced anti-interference capability,and improved sensitivity was proposed.The measurement principles and equivalent lumped parameter circuit model of the combined PCB Rogowski coil were analyzed to identify key factors influencing measurement bandwidth.A differential design was implemented to enhance anti-interference performance,which was further analyzed in detail.Finite element simulation software was used to evaluate interference in various electromagnetic environments,confirming the high anti-interference characteristics of the loop-combined PCB differential Rogowski coil.Experimental verification showed that the designed sensor achieved a sensitivity of 3.46 mV/A and a linearity of 0.56%when measuring power frequency currents ranging from 1 A to 100 A.The maximum relative error during 10 A to 100 A measurements was 1.73%.In anti-interference tests,the sensor exhibited a maximum relative error variation of-0.39%,demonstrating strong anti-interference capability.Comparative experiments revealed that the proposed coil effectively resists electric and magnetic field interference while expanding the measurement bandwidth without compromising sensitivity.This advancement broadens the application scenarios of Rogowski coils,enhancing their versatility and flexibility.In order to solve the trade-off between the bandwidth of the Rogowski coil and its sensitivity and anti-interference ability,the combined PCB differential Rogowski coil with high bandwidth,high anti-interference and high sensitivity was proposed.According to the measurement principle of the combined PCB Rogowski coil and the equivalent circuit model of lumped parameters,the key factors affecting the measurement bandwidth are analyzed,and on this basis,the differential design of the combined PCB Rogowski coil is adopted,and its anti-interference principle is analyzed.Using finite e

关 键 词：PCB罗氏线圈 线圈设计 带宽 抗干扰 电流测量 

分 类 号：TM933.13[电气工程—电力电子与电力传动] TH89[机械工程—仪器科学与技术]