The step-up DC–DC converter is widely used for applications such as IoT sensor nodes, energy harvesting, and photovoltaic (PV) systems. In this article, a new topological quasi-Z-source (QZ) high step-up DC–DC converter for the PV system is proposed. The topology of this converter is based on the voltage-doubler circuits. Compared with a conventional quasi-Z-source DC–DC converter, the proposed converter features low voltage ripple at the output, the use of a common ground switch, and low stress on circuit components. The new topology, named a low-side-drive quasi-Z-source boost converter (LQZC), consists of a flying capacitor (CF), the QZ network, two diodes, and a N-channel MOS switch. A 60 W laboratory prototype DC–DC converter achieved 94.9% power efficiency.
A new quasi-Z-source high step-up dc-dc converter is proposed in this letter. Compared with a conventional quasi-Z-source dc-dc converter, the proposed converter features low voltage ripple at the output, the use of a common source switch, and low stress on circuit elements. The advantages including low EMI, free of high side driver, and reduction of cost has been expected. The new topology named as a low-side-drive Quasi-Z-source boost converter (LQZC) consists of a flying capacitor (C F ), the QZ, two diodes and a N-channel switch. About 1/5 reduction of the output ripple was verified by the PSIM simulation when the input voltage is 48V at a duty ratio of 0.1.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.