Abstract
This study presents a novel soft-switched isolated boost converter which can provide a high-step-up ratio and high efficiency with low-voltage stress for portable application as well as a photovoltaic-assisted converter system. A lossless active clamp snubber circuit helps in achieving zero-voltage-switching turn-off and zero-current-switching (ZCS) turn-on of the main switch and ZCS turn-off of diodes that reduce switching losses. An auxiliary switch with an energy recovery circuit helps to increase power conversion efficiency and reduces switching stress across the main switch. The proposed idea is simulation through computer-assisted software PSIM 9.1.1 and validated experimentally through a designed prototype 250 W direct current (DC)–DC converter.
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