Abstract
ABSTRACT This article synthesises a Double Dual Quadratic Boost (DDQB) converter from a conventional quadratic boost converter. The DDQB’s working principle and steady-state analysis are investigated. The dynamic performance of the DDQB converter is analysed and studied thoroughly. The superiority of the proposed converter is highlighted by comparing it with similar topologies reported in the literature. The advantages of the double dual concept in dc–dc converters over cascaded dc–dc converters are highlighted regarding component stress and power loss reduction. Furthermore, the proposed topology has a low switch count, reduced stresses, and enhanced overall efficiency. The DDQB converter’s gain is eight times for duty cycle D = 0.528 with switch voltage stress of 4.48 times of input voltage, which is not equal to the output voltage of a traditional quadratic boost converter. Additionally, the reconfigured converter with fault-tolerant capability is proposed. In this restructured configuration, single-degree redundancy is studied and analysed for the malfunction of the output capacitor. The performance of restructured configuration is validated in simulation and its reliability is compared with the DDQB converter. Experimentation on a 50 W scaled-down prototype configuration validates the proposed high-gain DDQB topology.
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