| Abstract |
This work combines a rogowski coil with a Zero-Current Detector (ZCD) to significantly enhance the current sensing ability of rogowski coils.The proposed method allows the design of an integrated rogowski-coil-based sensor which is able to measure alternating currents with dc offsets.Thereby, rogowski-coil-based current measurement are made applicable to a wide grade of applications, e.g., for grid-connected applications or control of electrical machines.This paper presents the design and implementation of the sensor as well as the evaluation algorithm.Measurements are shown for a prototype sensor with a design frequency range of f = 100 Hz to 40000 Hz and currents of up to I = 50 A.The measurements validate the ability of the sensor to measure alternating currents with dc offsets. |
