Non-Isolated High Step-Up DC-DC Interleaved Boost Converter Based on Coupled Inductors and Voltage Multiplier Cells

Thaís Carvalho Salvador, Rafael Mario da Silva, Waner Wodson Aparecido Goncalves Silva, Nedson Joaquim Maia, Fernando Lessa Tofoli () and Enio Roberto Ribeiro
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Thaís Carvalho Salvador: Institute of System Engineering and Information Technology, Federal University of Itajubá, Itajubá 37500-176, Brazil
Rafael Mario da Silva: Campus Itabira, Federal University of Itajubá, Itabira 35903-087, Brazil
Waner Wodson Aparecido Goncalves Silva: Campus Itabira, Federal University of Itajubá, Itabira 35903-087, Brazil
Nedson Joaquim Maia: Institute of System Engineering and Information Technology, Federal University of Itajubá, Itajubá 37500-176, Brazil
Fernando Lessa Tofoli: Department of Electrical Engineering, Federal University of São João del-Rei, São João del-Rei 36307-352, Brazil
Enio Roberto Ribeiro: Institute of System Engineering and Information Technology, Federal University of Itajubá, Itajubá 37500-176, Brazil

Energies, 2025, vol. 18, issue 19, 1-21

Abstract: This work introduces a non-isolated high step-up dc-dc interleaved boost converter combining magnetic coupling and voltage multiplier cells (VMCs). The proposed topology features a transformer with two primary windings of equal turns, interconnected to each other, enabling improved current sharing, and multiple secondary windings that contribute to extending the voltage gain. A three-winding coupled inductor is integrated into the design, while VMCs not only boost the output voltage but also significantly reduce the voltage stresses on the switches, eliminating the need for extreme duty ratios. The converter exhibits inherent modularity, allowing for voltage gain adjustments either through the turns ratio of the coupled inductor or by incorporating additional VMCs. An in-depth analysis of the topology is derived, and an experimental prototype rated at 48 V/400 V, 25 kHz, and 1 kW is implemented to verify and validate the theoretical claims, achieving an efficiency of 95.12% at full-load conditions.

Keywords: boost converter; coupled inductors; dc-dc converters; non-isolated high step-up converters; voltage multiplier cells (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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