Independent Double-Boost Interleaved Converter with Three-Level Output

This paper introduces a novel converter topology based on an independent controlled double-boost configuration. The structure was achieved by combining two independent classic boost converters connected in parallel at the input and in series at the output. Through proper control of the two boost converters, an interleaved topology was obtained, which presents a low ripple for the input current. Being connected in series at the output, a three-level structure was attained with twice the voltage gain of classic boost and interleaved topologies. A significant feature of the proposed converter is the possibility of independent operation of the two integrated boost converters, in both symmetrical and asymmetrical modes. This feature may be particularly useful in voltage balancing or interconnection with bipolar DC grids/applications. The operation principle, simulations, mathematical analysis, and laboratory prototype experimental results are presented.

Automated summary

This paper introduces a novel converter topology based on an independent controlled double-boost configuration, which consists of two independent boost converters connected in parallel at the input and in series at the output, achieving a three-level structure with twice the voltage gain of classic boost and interleaved topologies. A significant feature is the possibility of independent operation of the two boost converters, which can be useful for voltage balancing or interconnection with bipolar DC grids/applications. The operation principle, simulations, mathematical analysis, and laboratory prototype experimental results are presented.