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Item An Integrated Onboard EV Charger With Wide Voltage Range Compatibility(Institute of Electrical and Electronics Engineers Inc., 2025) Kumar, V.; Prabhakaran, P.; Reddy, B.D.; Febin, J.L.F.Electric vehicles (EVs) typically employ separate onboard chargers and traction inverters for battery charging and motor operation, respectively. This paper proposes a bidirectional integrated onboard charger (BIOC) that utilizes a single power converter to perform both functions, thereby reducing cost, improving system compactness, and supporting fast charging. The proposed BIOC architecture is implemented using a totem-pole power factor correction (PFC) stage combined with an additional coupling unit. This configuration supports a wide range of battery voltages and is compatible with both AC and DC grid inputs. The BIOC incorporates active power decoupling (APD) to minimize voltage ripple at the battery terminals during high-voltage (HV) battery charging. Leakage current analysis of the totem-pole PFC stage confirms compliance with safety standards, and a detailed switch loss calculation procedure is presented. A comprehensive controller design is developed using State-Space Averaging (SSA) and Small Signal Modelling (SSM), followed by a K-factor method to ensure optimal performance across various operating modes. The proposed system is validated through simulations on a 2 kW Simulink model and experimental testing on a 400 W scaled-down prototype, demonstrating effective charging of an EV battery across a wide voltage range from both AC and DC grids. This work offers a unified, efficient, and cost-effective solution for integrated onboard EV charging. © 2013 IEEE.Item Novel Reconfigurable Power Converters Facilitating Dual Battery Integration in Electric Vehicles(Institute of Electrical and Electronics Engineers Inc., 2025) Kumar, V.; Prabhakaran, P.; Raj, N.Battery-operated Electric Vehicles (EVs) are experiencing a significant surge in demand in today's market. The primary obstacles to the growth of the EV industry include concerns about range anxiety and reliability. To address these challenges, Dual battery-based solutions are emerging as a recent trend in the EV, specifically the two-wheeler segment. This paper introduces two novel reconfigurable power converters that enable dual battery integration. The converters can connect the dual batteries in series or in parallel or allow using a single battery during traction or charging. The output terminals of the converters can be directly connected to the charger or traction inverter. To connect dual batteries in parallel with minimum circulating currents, the terminal potentials must be nearly equal. The proposed converters include a voltage balancing feature to ensure this balance. To demonstrate dual battery charging, the proposed converter is integrated into a non-isolated inverter charger system (ICS). Transfer functions for the system with the proposed converter have been derived using state space averaging and small signal modeling, and the necessary controllers have been designed using the K-factor approach. Comprehensive MATLAB simulations and hardware experiments are presented to validate the effectiveness of the proposed power converters. © 1972-2012 IEEE.