Calibration of Rogowski Coils at High Pulsed Currents

Abstract

Calibration of Rogowski Coils at High Pulsed Currents. The many applications of Rogowski coils include their use as current sensors in AC resistance welding. Weld quality depends on monitoring/controlling the welding currents. The accuracy of these current sensors matters, and so does the accuracy of their calibration. A high-accuracy system for calibrating Rogowski coils at continuous AC currents was previously developed at NRC. However, in AC resistance welding, high pulsed currents are used. A new calibration system was developed to calibrate current sensors and related equipment under high pulsed currents.