Comparison of losses in different topologies of step-up/step-down inverters

Standard Voltage Source Inverters (VSI) operates with a DC voltage source greater than the peak voltage of the AC source and Current Source Inverters (CSI) with a DC voltage source lower than the peak voltage of the AC source. This paper shows how several topologies of reversible AC/DC buck-boost inverters which do not suffer from such constraints can be compared on the basis of semiconductor and inductor losses. The main quantities in these converters, such as average current, RMS current, etc. are derived from an analytical analysis and they are combined to semiconductor loss models to derive losses and efficiency of each topology for different working conditions.