Work

Design of a soft-switched interleaved high step-up non-isolated DC-DC converter for renewable energy sources integration

Year: 2026

Type: article

Abstract: This study introduces an interleaved high step-up non-isolated DC-DC converter which incorporates a soft-switching mechanism. The proposed design ensures that all the switches and diodes operate under soft-switching conditions, specifically operating with both zero voltage switching (ZVS) and zero current switching (ZCS) during transitions. These favorable switching conditions are achieved using a low number of additional components namely, a single auxiliary resonant circuit and one auxiliary inductor without requiring any extra switches. As a result, switching losses are significantly reduced or effectively eliminated. This leads to enhanced performance and higher efficiency, particularly when operating at high switching frequencies. Furthermore, the converter is adaptable for multi-phase interleaved configurations, retaining all the advantages of the single-phase design. The paper provides a thorough theoretical analysis of the proposed structure. To validate the theoretical findings, a prototype was developed demonstrating a conversion from 40 V input to 300 V output with an efficiency of 94.42%.

Source: Scientific Reports

DOI: 10.1038/s41598-026-71978-1

Authors: Fatemeh Falahi, Ebrahim Babaei, Darioush Alizadeh, Mehran Sabahi

Institutions: University of Tabriz, Khazar University, Okan University, Imam Khomeini International University

Language: English

Topic: Advanced DC-DC Converters

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Industry, innovation and infrastructure

Open Access status: gold

Estimated APC paid: $2,690