Naturally Clamped, Isolated, High-Gain DC-DC Converter with Voltage Doubler for Battery Charging of EVs and PHEVs

摘要

Plug-in hybrid electric vehicles (PHEVs) have a conventional internal combustion (IC) engine running on fossil fuels as well as an electric motor that gets supply from a battery which can be charged using external supply like electric vehicles (EVs). Using renewable energy sources like fuel cells or solar photo-voltaics (PVs) for charging the battery, EVs and PHEVs can become even cleaner as far as the environment is concerned. These energy sources generate a low voltage which is limited to around 40-50 V due to practical constraints, while batteries that power EVs and PHEVs need a charging voltage of around 350 V. This paper presents a novel naturally clamped, isolated, DC-DC converter which has a voltage doubler rectifier at the output end which converts 12 V supply from renewable sources to 350 V to enable battery charging.