Design and Analysis of Switched Inductor-Based Quadratic Boost Converter with Enhanced Voltage Gain and Reduced Component Voltage Stress

A novel non-isolated quadratic boost converter named "Switched Inductor based Quadratic Boost Converter (SLQBC)" is proposed to achieve an enhanced voltage gain with reduced voltage stress across the circuit elements. The proposed topology is derived using the switched inductor concept, resulting in a significant improvement in the voltage gain. The SLQBC offers continuous source current, reduced voltage stress across the switches and output capacitors, maintains a common ground reference point and offers two degree of freedom of control by incorporating two switches operating under two different duty ratios. This article presents a thorough depiction of SLQBC, encompassing its various modes of operation, along with a detailed analysis of its steady-state waveforms in continuous conduction mode (CCM). The paper includes a detailed comparison study of the proposed topology with other existing topologies that exhibit similar quadratic voltage gains. In order to examine the experimental validity, a hardware prototype of 300 W, 400 V, 50 kHz is developed, and the resulting experimental results are presented to analyze its overall performance.