Conference Papers
Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506
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Item A Non-Isolated Buck-Boost DC-DC Converter for On-Board Electric Vehicle Powertrain(Institute of Electrical and Electronics Engineers Inc., 2023) Vinusha, B.; Kalpana, R.; Kishan, D.In this paper, a non-isolated buck-boost DC-DC converter for on-board electric vehicle powertrain is proposed. It has a universal-input voltage capability for the requirement of power factor correction in electric vehicles. It can be operated in buck, boost, or pass-through modes to optimize performance depending on the operating conditions. It has advantages of lower switch voltage stresses, reduced size of the magnetics and lower inductor conduction losses in comparison to single-switch buck-boost converters or other two-switch buck-boost converters. The operation of the converter in buck and boost modes is discussed in detail, followed by necessary mathematical modelling. To validate the effectiveness of proposed converter, simulation studies are carried-out with the help of MATLAB-Simulink. © 2023 IEEE.Item Design and Analysis of Wide Bandgap device based DAB Converter for EV On-Board Chargers(Institute of Electrical and Electronics Engineers Inc., 2024) Kumar, A.; Kalpana, R.; Bobba, P.B.This paper focused on design and simulation of 3.3 kW, 400V DC output, Gallium nitride high electron mobility transistors (GaN-HEMT) based Dual Active Bridge (DAB) DC-DC Converter for EV On-board Chargers (OBC). An optimized design of converter with high power density and high efficiency is proposed. GaN-HEMT and Planar Transformer are selected to achieve high power density due to its compact size and high switching frequency. Proposed GaN based converter design, overall component selection, modes of operation and control strategies are discussed in details. The simulation of proposed converter is carried out in Plexim software. The performance analysis of GaN based DAB and SiC based DAB are presented in Plexim software. The overall device losses of both converters are compared and presented. © 2024 IEEE.Item Design and Analysis of GaN and Planar Magnetics based DAB Converter for EV On-Board Chargers(Institute of Electrical and Electronics Engineers Inc., 2025) Kumar, A.; Kalpana, R.In this paper, A A 3.3kW, 600V DC input, 400V DC output, 250kHz Gallium nitride (GaN) based Dual Active Bridge (DAB) DC-DC Converter for EV on-board charger (OBC) is proposed. Typically, OBC consists of two stages, AC-DC and isolated DC-DC converter. An optimized design of isolated DC-DC converter with high switching frequency is proposed. In order to achieve high power density and high efficiency, DAB converter with GaN high electron mobility transistors (GaN-HEMT) as switch and Planar transformer are selected for converter design. Design of Planar transformer-based DAB Converter design are discussed in detail. Core selections and PCB based winding design of Planar Transformer are also discussed. The OBC is designed and evaluated in PLECS software. The performance of proposed GaN based DC-DC converter and SiC-DAB are analyzed and their losses are compared and presented in PLECS Software. © 2025 IEEE.