Work

A tapped-inductor-based high step-down DC–DC converter with continuous input and output currents for intermediate bus applications

Year: 2026

Type: article

Abstract: This paper presents a new nonisolated high step-down DC–DC converter for high-power intermediate bus applications. The proposed topology achieves a very large voltage reduction while maintaining low input and output current ripple, which is critical for power quality in high-power systems. Owing to the extended effective duty-cycle operation, the proposed converter significantly reduces the current stress on power switches and diodes. All switches are driven simultaneously, resulting in a simple control implementation without complex modulation schemes. In addition, the converter inherently suppresses voltage spikes across the switches, eliminating the need for auxiliary clamping circuits. A 1 kW laboratory prototype is designed for a 400V input and a 36 V output. Experimental results demonstrate continuous input and output currents, spike-free switch voltages, and a peak efficiency of 94.20% and a full-load efficiency of 93.10% at the rated operating condition, confirming the suitability of the proposed converter for high-power DC–DC conversion.

Source: Scientific Reports

DOI: 10.1038/s41598-026-74720-z

Authors: Mohsen Rezaei Kheirabadi, Majid Delshad, Bahador Fani

Institution: Islamic Azad University, Isfahan

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