Analytical Probe Compensation Under Transient Signals Using a Transfer Function Approach

Abstract

A larger deployment of power-electronic converters, with increasingly high switching frequencies, can be observed and associated with a higher complexity to achieve optimal performance not only on design, integration, reliability, and cost of power solutions but also on related electromagnetic compatibility measurements. Thus, a pulsed sensor calibration over the kHz range is desired to obtain significant results. This work presents a mathematical derivation of a transient compensation technique for current clamps based on transfer functions and time-domain waveforms. By converting the aperiodic signals of the probe using a Laplace transform, the method can be easily performed in the frequency domain, the original waveform in the line can be accurately predicted and correction factors for field sensors can be determined if needed.