Design and Analysis of Dual-switch Enhanced Gain Boost Converter

A switching capacitor based enhanced voltage gain boost topology is proposed in this paper. This circuit is capable of yielding a high-voltage transformation ratio at smaller duty ratios. To achieve this, a capacitor is connected in the H-bridge and the arms are constituted by the dual-switch and diode pair. The down-stream circuit consists of two-capacitors, an inductance along with switching devices. The proposed converter operating principle is explained and its performance is analyzed for the continuous inductor current mode of operation. Averaged models are formulated to investigate the proposed converter behavior under dynamic conditions 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. For the purpose of verification, a 48 V, 40 W prototype is constructed which is supplied from an input voltage of 15 V. Sample simulation and measured results are depicted to demonstrate the enhanced gain boost converter salient features.