An Interleaved Non-isolated Step-up DC-DC Converter with Built-In Transformer For Renewable Energy Systems

Abstract

This paper presents a high step-up DC-DC converter based on the built-in transformer (BIT). High voltage without more number of elements is achieved in the proposed converter. Moreover, the interlevead structure is used in this converter, causing low input current ripple. In addition, the voltage stress across power switches and diodes can be decreased, thanks to the passive clamp circuit. Meanwhile, due to the leakage inductance of BIT, not only turn-ON state for MOSFETS at zero current switching (ZCS) performace is provided but also ZCS turn-OFF state for all diodes is achieved.. Thus, reverse recovery problem of the power diodes is attenuated. Accroding to the above-mentioned advantages, the proposed converter is an interesting solution for high power applications. To verify the performance of the proposed converter PSIM simulation results of the proposed converter with 40-400V voltage conversion and 600W rated power are discussed in this paper.