An Analysis of Advanced Soft-Switching Techniques for DC–AC Power Converters Based on Auxiliary Circuits

At present, there is a huge trend in the industry for power converters that have the ability to reach a high efficiency at high switching frequencies. General power converters have switching losses which act as a barrier in terms of efficiency while designing high-frequency converters. As a solution for this, soft switching techniques come into play by integrating a resonant circuit into the traditional power converter. These resonant converters give the ability of the power converters to operate in high frequencies without switching losses. Also in electric vehicles as well as wireless charging, the switching frequency can be increased to a higher level without the switching losses using these converters. Furthermore, it can be used in bi-directional converters with MOSFETs like SiC and GaN. An analytical review of the advanced resonant converter design topologies is discussed in this paper based on three main designs for auxiliary-based circuits. Finally, a comparative analysis is conducted using the various converter parameters. This analysis will be a huge benefit for the power electronics circuit design area to select the most suitable type of circuit for the application.