Design Equations for DC-DC Quasi-ZSC

DC-DC quasi impedance source converters (q-ZSCs) with buck-boost converter gain have been recently proposed. Operation of these converters have been verified by simulation and experimental prototypes. However, the components selection for these converters were done arbitrarily due to lack of design equations. Arbitrary selection of components hinders optimal performance due to either selecting overrated or underrated components. This paper derives the design equations of a DC-DC q-ZSC and verify their validity by using them to design three converters with different ripple percentage for a specific application. Operations of the three converters were simulated and their response confirmed the validity of the equations. The equations showed that the requirement for each capacitor and inductor is different for its pair. Thus, use of asymmetric components will be more efficient.