Bridgeless Modified Boost Converter With Sepic For Enhanced Power Factor In Ev Battery Charging Systems
Keywords:
Electric Vehicle (EV); Battery Charging; SEPIC Converter; Bridgeless Topology; Power Factor Correction (PFC); Total Harmonic Distortion (THD); High Efficiency; Power Quality.Abstract
Electric vehicle (EV) battery charging systems require high efficiency and compliance
with power quality standards, particularly regarding input current harmonics and power factor. Conventional boost converters often suffer from high voltage stress and limited flexibility in regulating output voltage while maintaining a high power factor. This project presents a SEPIC (Single-Ended Primary Inductor Converter) based bridgeless converter topology for EV battery charging applications, aimed at improving input power factor and reducing conduction losses. The proposed SEPIC converter combines the advantages of continuous input current, reduced voltage stress, and the ability to step up or step down the input voltage, making it suitable for varying grid conditions. Simulation and experimental results demonstrate that the bridgeless SEPIC converter achieves high efficiency, low total harmonic distortion (THD), and improved power factor, while maintaining stable and controllable battery charging characteristics. This work provides a practical and efficient solution for modern EV chargers, meeting both energy efficiency and regulatory requirements.
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References
Prabaakaran Kandasamy, R. Senthil Kumar & Pradeep Katta (2021). Power factor correction based EV battery charger using a bridgeless isolated SEPIC converter. Journal of Physics: Conference Series, 1916(1):012143
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