一种基于印刷电路板技术的窄带型空心电流互感器

Twin-loop Rogowski Coil Current Transformer Based on Printed Circuit Boards

空心电流互感器响应快、不存在磁饱和、成本低廉,是近年来广泛关注的一种电子式互感器。传统手工绕制的空心线圈无法完全满足理想空心线圈的基本假设,在准确度和稳定性方面存在一定缺陷,基于印刷电路板技术的空心线圈的出现有效解决了这一问题,先后有组合型和平板型两种结构被提出。笔者提出了一种印刷电路板空心线圈的窄带型结构,该结构作为上述两种结构的有效补充,适合应用于制作外形不规则的大尺寸空心线圈。相关试验表明,窄带型空心线圈测量准确度较高,应用前景广阔。

Rogowski coil current transformers have been rapidly developed in recent years for their quick response, low price and absence of magnetic saturation. Conventional hand-made Rogowski coils cannot entirely meet the requirements for the ideal one, hence innovative Rogowski coils based on printed circuit boards have been developed to improve the accuracy and stability. This paper presents a twin-loop Rogowski coil to supplement the existing combined Rogowski coil and planar Rogowski coil. Experimental results show that the twin-loop Rogowski coil has higher measurement accuracy.