Development of Magnetic Core Framework for Flexible Rogowski Coil Current Transducer

Based on the detailed analysis of the working principle of Rogowski coil current transducer, this study propose a possible method to improve the detection sensitivity by filling the high permeability flexible magnetic core framework. A flexible magnetic core including manganese zinc ferrite, permalloy and silicone rubber was prepared. This kind of flexible magnetic core greatly improves the magnetic permeability of Rogowski coil (about 18 times higher at 100 Hz), which efficiently magnify the induced voltage signal and improve the sensitivity of Rogowski coil. The flexible magnetic core framework developed in this study provides technical support for the construction of a high-sensitivity flexible Rogowski coil current transducer for detecting low amplitude current below 100A in the electric power field.