Improved Interleaved DC-DC Converter Without Auxiliary Switches: Analysis and Experimental Validation

Abstract

This paper presents a new two-phase interleaved boost converter for photovoltaic applications. An interleaved boost converter improved with an additional resonant circuit is proposed. The auxiliary circuit with a resonant inductor, a capacitor, and two diodes is used to obtain a zero-voltage switching condition. This converter has the advantages of reduced switching losses, better efficiency, and reduced input current ripples. The operating principles and design analysis are also presented. To validate the theoretical analysis, a prototype of a 48 V/260 V/200 W converter system is developed, and an efficiency of 96% is obtained.

Cite this article as: V. Venkata Subrahmanya Kumar Bhajana, P. Biswal, P. Drabek, and V. Kakani, “Improved interleaved DC-DC converter without auxiliary switches:
analysis and experimental validation,” Electrica, 25, 0189, 2025. doi: 10.5152/electrica.2025.24189.