An efficient soft switching synchronous buck converter for battery charging application in hybrid electric vehicle architecture

Abstract

SummaryThis paper proposes a novel topology based on a zero voltage soft switching (ZVS) synchronous buck DC‐DC converter using an auxiliary unidirectional cell comprising a diode, a switch, and an inductor. This unidirectional cell aids in achieving the soft‐switching condition for the synchronous switches, thereby abating switching losses and enhancing the system efficiency. Furthermore, the presence of the unidirectional cell results in no additional current or voltage stress on the switches. This topology is well suited to hybrid electric vehicle (HEV) architecture. Detailed analysis and operation of the proposed topology are discussed. The results of the proposed topology are analyzed using MATLAB/Simulink software and validated experimentally.

Research and implementation of an innovative modular non‐isolated step‐down DC‐DC structure with continuous input current based on the Ćuk converter

“…The proposed topology is tested using a 300 W prototype, achieving a full load efficiency of 92.4% at input voltage 380 V and output voltage 5 V, and a maximum efficiency of 94.55% at 100 W. The proposed topology also eliminates the need for extreme duty cycles. In a previous paper, 24 a novel topology for a zero‐voltage soft switching (ZVS) synchronous buck DC‐DC converter was introduced, utilizing an auxiliary unidirectional cell. This unidirectional cell achieves soft‐switching conditions for synchronous switches, reducing switching losses and improving system efficiency.…”