Open AccessHigh step‐up cascade synchronous boost DC–DC converter with zero‐voltage switching
Author(s) -
Lee SinWoo,
Do HyunLark
Publication year - 2018
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2017.0432
Subject(s) - boost converter , inductor , cascade , ćuk converter , forward converter , voltage , control theory (sociology) , buck–boost converter , rectifier (neural networks) , electronic engineering , computer science , electrical engineering , engineering , chemical engineering , stochastic neural network , control (management) , artificial intelligence , machine learning , recurrent neural network , artificial neural network
A high step‐up cascade synchronous boost DC–DC converter with zero‐voltage switching (ZVS) is proposed. The proposed converter is based on the conventional cascade boost converter with a single switch. In the first stage, a boost cell is modified to improve the voltage gain by utilising a coupled inductor. Additionally, turn ratio can be used to adjust voltage gain. In the second stage, a synchronous rectifier is adopted instead of the output diode to improve power efficiency. Moreover, ZVS is achieved using an auxiliary circuit, which consists of a coupled inductor and a small inductor. Therefore, total power efficiency is improved and high voltage gain can be obtained from a low turn ratio. The theoretical analysis and performance are proven from the experiment results using a prototype of the proposed converter with an output of 200 V–200 W.