Sustainable DC Power Supply Using High Gain Passive Quadratic-Boost Converter (PQ-BC) with High-Current Low-Voltage Battery Cells

Abstract

This paper presents the design and simulation of a high step-up DC-DC converter employing a passive quadratic gain circuit integrated with a single active-switch boost topology for sustainable power source applications. The proposed quadratic network consists of a diode-inductor-capacitor configuration, connected at the input side of a conventional boost converter. The inductor in the passive gain circuit is periodically energized by the main active switch trough a diode, enabling higher voltage transfer and store at the intermediate capacitor. The stored voltage is subsequently step-up by the conventional boost stage, resulting in an overall quadratic voltage gain. The operating principle and steady state voltage gain characteristics of the proposed system are analyzed. Simulations are conducted to validate and evaluate the converter performances. The results demonstrate that the proposed topology achieves a significantly higher voltage gain compared to the conventional boost converter under identical duty cycles. The proposed passive quadratic converter provides advantages in terms of reduced complexity, lower cost, and improved suitability for renewable energy power systems.