4-Switch GaN Converter Based Set-Up for High Frequency Magnetics' Characterization

This paper describes a hardware implementation of a 4-switch GaN converter set-up for characterization of high-frequency magnetic cores. The selected converter topology represents a versatile measurement solution for characterizing magnetic cores under both pure ac and ac + dc excitations. The set-up features duty cycle and dead-time control, which allows testing with various types of rectangular waveforms typical of power electronics. The proposed power stage allows core loss tests up to the MHz range. The performance of the set-up is demonstrated through experiments conducted on a Mn-Zn ferrite core with three types of rectangular ac excitation.