Faculty Publications
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Publications by NITK Faculty
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Item A Novel Non-Isolated Ultra High Gain DC-DC Converter with Single Switch and Dual Boost Cells(Institute of Electrical and Electronics Engineers Inc., 2023) Mandal, S.; Prabhakaran, P.This paper presents a novel Non-Isolated Ultra High Gain DC-DC Converter with Single Switch, featuring two boost cell networks: a capacitor and two diodes (C2D) boost cell, and two capacitors, two inductors, and three diodes (2C2L3D) boost cell. The innovative combination of the two aforementioned boost cells achieves an unprecedented level of ultra-high gain, while reducing voltage stress across the switch and diodes and minimizing component count compared to existing high-gain converters. The proposed converter exhibits exceptional adaptability, operating efficiently with a wide range of duty ratios for diverse voltage conversion scenarios. A comprehensive explanation of the working principle and steady-state analysis is provided, along with a detailed comparison to state-of-the-art high-gain converter topologies. Extensive theoretical analysis and precise MATLAB simulations confirm the converter's superior performance and efficiency, solidifying its potential for practical applications. © 2023 IEEE.Item A Bidirectional Interleaved Totem Pole PFC-Based Integrated On-Board Charger for EV SRM Drive(Institute of Electrical and Electronics Engineers Inc., 2024) Faheem Ali, T.; Arun Dominic, A.D.; Prabhakaran, P.; Parameswaran, A.P.This paper presents an improved integrated on-board charger (IOBC) tailored for a 4-phase switched reluctance motor (SRM) drive. The proposed IOBC is non-isolated and utilizes the totem pole power factor correction (PFC) operation for reduced common-mode voltage. Furthermore, the proposed system accommodates bidirectional functions, ensuring versatility during charging mode. A non-isolated IOBC for SRM with reduced common-mode voltage and bidirectional capability has largely been ignored in the literature. The proposed system utilizes a modified Miller converter in the motoring mode and is easily reconfigured into a two-phase interleaved totem pole converter during charging modes without the need for any magnetic contactors. The proposed system features zero instantaneous torque (ZIT) at steady-state, ensuring minimal machine wear during charging modes. The proposed IOBC is controlled to ensure symmetric positive and negative grid currents for any given rotor position (during charging), thereby eliminating even harmonics and enhancing the power quality of grid current. The proposed system achieves charging power twice the motoring power with parallel-connected phase windings. Ansys electromagnetic transient simulation, MATLAB-based SRM drive simulations, experimental results, and comprehensive comparative analysis are presented to validate the various features and effectiveness of the proposed IOBC for SRM. © 2013 IEEE.