Operation of New Five Level Resonant Buck-Boost Converter at Asymmetrical Outputs

This paper is concerned with the control of a new four channel resonant DC/DC Buck-Boost converter that has two input and four output channels. The converter can provide four identical voltage levels at the output, while also four different ones. Analysing the operation of the converter during discontinuous current conduction mode under steady state conditions at asymmetrical outputs stands in the focus of this paper. A detailed analysis provides the relations among the input, control and output variables contributing to the optimal circuit design. Advantages of the proposed converter are the zero voltage and zero current switching, improved performance and high efficiency due to reduced switching losses. Possible application fields are UPS systems, DC microgrids and multi-level inverter drives.