Two-switch High Gain Boost Converter

A two-switch based high gain boost converter (TSHBC) exhibiting improved voltage gain is proposed in this paper. Its operating duty ratio range is 0 to 0.5 and is able to establish high-voltage transformation ratio. To achieve this, two charge-pump capacitors along with an inductance is utilized in the topological development. A capacitor is also connected across the load to suppress the ripples and thus the converter forms a fourth-order system. Principle of operation is explained for the continuous inductor current mode of operation. Steady-state analysis is performed and the converter elements design equations are formulated. Later on state-space models are formulated to quantify the TSHBC dynamic behavior and then to design suitable controller. In addition, a brief tabular form of features of the proposed converter and other dual-switch based converters is brought out for ready reference. A 15 V to 48/60 V, 40 W prototype TSHBC is constructed for experimental verification. Measurement results are supported with simulation results to demonstrate the proposed high gain boost converter salient features.