Abstract
Energy transformation by power electronic converters is not feasible without the efficient use of renewable energy. The article tries to extend the use of renewable energy to PHEV battery charging. In PHEV, the battery is one of the major sources of stored energy. The converter used for charging these batteries is of crucial concern. The paper addresses various challenges in designing a DC to DC converter for battery charging in DC bus. An optimized converter is designed to work with renewable energy sources to accomplish a high boost ratio, low input current ripple, low output voltage ripple, high power efficiency, and high power density. A combination of two interleaved boost converters is effectively used with the overlap time switching to achieve a high voltage boost ratio in forming the DC bus. Transformer isolation is used to increase reliability and boost ratio further. The secondary side employs a series-connected voltage doubler. The converter boosts an input voltage of 24 V to a range of 300–400 V. Simulation results have been obtained for a 300 W system. Simulation results are validated by a prototype implementation for a 250 W system. The converter is studied and analyzed for steady-state and transient state characteristics and the power efficiency obtained is 92.9%.
Highlights
Owing to the exponential increase in the industrial revolution, the world has been confronting extremely difficult challenges of meeting the ever-increasing demand of fuel, preserving the natural energy resources from becoming depleted and keeping the environment from getting polluted. These challenges can be overcome by employing various courses viz. saving energy, sustainable consumption, the efficient transformation of energy from one form to another, efficient use of energy, and shifting the focus from the use of conventional energy resources to non-conventional and renewable energy resources
One of the merits of an electric vehicle is that speed-torque characteristics are inherently provided by the electric motor, for which a special gear ratio assembly is employed in combustion engine vehicles
Present-day converter systems available for battery charging applications in PHEV are studied and analyzed considering their merits and demerits. 2-cell interleaved full-bridge isolated converter has been recommended in the past for PHEV battery charging
Summary
Owing to the exponential increase in the industrial revolution, the world has been confronting extremely difficult challenges of meeting the ever-increasing demand of fuel, preserving the natural energy resources from becoming depleted and keeping the environment from getting polluted. These challenges can be overcome by employing various courses viz. One of the merits of an electric vehicle is that speed-torque characteristics are inherently provided by the electric motor, for which a special gear ratio assembly is employed in combustion engine vehicles. A vigorous study and research are going on in developing new, high power-efficient, high power-dense, compact battery chargers
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