Improvement in Performance of Hybrid Electric Vehicle Charging Station by Using Single-Stage Boost DC-DC Converter

Electrical & Electronics Engineering

Charging of Li-ion battery can be done which is used for providing propulsion torque and through various stages of charger voltage and current level is controlled and make them desired for charging. But, it requires dual-stage conversion system which utilizes dual DC-DC converters for voltage-power conversion which increases the cost and size of the system. Based on the summarized merits & demerits of dual-stage DC-DC converters, a single-stage high voltage gain converter is greatly suitable for EV-charging system due to high voltage gain, low switch stress, low current ripples, low EMI issues, and low complex design. The voltage 230V coming from AC source is converted into 324-329V by using proposed modified boost converter with a moderate duty cycle which reduces the switching losses and maximizing the efficiency. The main objective of this work is proposing a novel single stage high step-up DC-DC converter for EV charging system powered by AC utility grid with enhanced profiles. The well-recognition of proposed scheme is validated under dual-stage and single-stage DC-DC converters for EV charging is demonstrated through Matlab/Simulink tool and results are conferred with proper comparisons.

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