Abstract :

The Proposed Work Introduces A Hybrid AC/DC Charging Architecture For Electric Vehicles (EVs) Designed To Significantly Reduce Charging Time While Enhancing Operational Flexibility Without Dependence On Costly Off-board Fast-charging Infrastructure. Conventional Onboard AC Chargers Are Inherently Limited By Low Power Ratings, Resulting In Prolonged Charging Durations, Whereas External DC Fast Chargers Demand Substantial Investment And Impose Stress On Grid Capacity. To Overcome These Limitations, The Proposed System Integrates Both AC And DC Charging Functionalities Within The Vehicle By Effectively Utilizing Existing Drivetrain Components, Including The Inverter And Motor Windings. A Dedicated DC Charging Interface Is Implemented Through The Motor Neutral Point And Inverter Negative Rail, Enabling Seamless Integration With External DC Energy Sources Such As Photovoltaic Systems, DC Microgrids, And Battery Storage Units. The Drivetrain Inverter Is Reconfigured To Operate As An Interleaved DC-DC Converter, Facilitating High-power DC Charging, While A Standard Onboard Type-2 Charger Supports AC Charging. The System Operates In Three Distinct Modes: AC-only, DC-only, And Combined AC/DC Charging, Thereby Improving Charging Speed And Optimizing Energy Utilization. A Coordinated Control Strategy Is Employed To Regulate The DC-link Voltage, Prevent Circulating Currents, And Maintain Unity Power Factor During AC Operation. Simulation And Experimental Results Validate The Effectiveness Of The Proposed Approach, Demonstrating Enhanced Charging Performance, Reduced Reliance On External Infrastructure, And Improved Adaptability To Hybrid Energy Environments.

Published:

12-11-2023

Issue:

Vol. 23 No. 11 (2023)

Page Nos:

235-243

Section:

Articles

License:

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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