一种用于电流环校准的瞬态电流倍增器设计  

Design of a transient current multiplier for current coil calibration

作　　者：何鹏 朱宇洁[2] HE Peng;ZHU Yujie(School of Automation Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China;Metrology and Testing Center,China Academy of Engineering Physics,Mianyang 621900,China)

机构地区：[1]电子科技大学自动化工程学院,四川成都611731 [2]中国工程物理研究院计量测试中心,四川绵阳621900

出　　处：《中国测试》2022年第1期129-133,共5页China Measurement & Test

摘　　要：为解决脉冲电流测量系统中所用电流环满量程校准的需求,该文基于感应电流叠加原理设计实现一种瞬态电流倍增器,利用镜像交叠扣合的两块PCB形成螺旋缠绕闭合回路,使得通过套接在其内部的电流环中的感应电流得到增加。试验结果表明:利用重复性较好的小幅度过阻尼振荡电流作为输入信号,经倍增后所获感应电流波形特征能够保持高度一致,峰值最高可达20 kA,重复性优于1%,有效避免满量程校准电流环转换系数时对激励源的要求,可用于实现对电流环转换系数在整个电流测量范围内的满量程校准。In order to meet the requirement of full range calibration of current loop used in pulse current measurement system,a transient current multiplier based on the principle of induced current superposition is designed and implemented in this paper.Two printed circuit boards with mirror image overlap are used to form a spiral winding closed loop,so that the induced current in the current loop inside the sleeve can be increased.The experimental results show that the waveform characteristics of the induced current obtained by the transient current multiplier can maintain a high consistency with a peak value of up to 20 kA,and the repeatability is better than 1%.This method effectively avoids the requirement for the excitation source when the conversion coefficient of the current sensor is calibrated at full range,and can be used for the full-range calibration of the conversion coefficient of the current sensor within the whole current measurement range.

关 键 词：电流环 满量程校准 感应电流 倍增 

分 类 号：TM933.1[电气工程—电力电子与电力传动]