A Novel Nonisolated Buck–Boost DC–DC Converter With Low Voltage Stress on Components

This article proposes a new nonisolated dc–dc buck–boost converter with low voltage stress on components and enhanced voltage gain. This converter has a high voltage gain in boost mode and is capable of reducing the voltage level significantly in the buck mode, which makes it suitable for renewable energy and other industrial applications. Moreover, the number of components in this converter is low and the input current is continuous. Operational principles of the proposed converter in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM) are presented, efficiency analysis is discussed, and a small-signal model is derived. Comparisons between the presented converter and related buck–boost converters are given in terms of voltage gain, voltage stress on components, number of elements, etc. Besides, a single-input multioutput converter based on the proposed topology is presented. Experimental results from a lab-scale prototype are given for both buck and boost modes in order to verify the performance of the converter.