A Wide Bandwidth Current Probe Based on Rogowski Coil and Hall Sensor

A new wide bandwidth current probe for power applications based on a Hall sensor as well as on a Rogowski coil is presented in this paper. Employing these two sensors allows to eliminate the integrator circuit needed for the Rogowski signal. This paper shows that using a special way to merge the output of the Hall sensor with the Rogowski coil, a current probe can be realized which combines the advantages of both sensors. With this new probe DC currents as well as current transients with di/dt's of several kA/us can be measured. Keywords-Wide Bandwidth current probe, Sensors, Power semiconductor devices, New devices, Rogowski coil, Hall sensor