Harmonic Resonance Analysis of Buck DC-DC Converter

Frequency scanning analysis is currently the most widely used method for identifying the existence of resonance and for determining resonant frequencies. Unfortunately, the method does not provide complete information necessary for effective prediction of the resonance phenomenon. The purpose of this paper is to present an approach for the analysis of resonance phenomena in the buck DC-DC converters in pre-design studies. Resonance phenomena are investigated from the point of view of description in the state space. The results revealed many interesting insights into these phenomena. Based on the results, an approach for the analysis of resonance phenomena is proposed.