Faculty Publications
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Publications by NITK Faculty
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Item A Novel Non-Isolated DC-DC Converter with Active Switched-Inductor for High Voltage Gain Applications(Institute of Electrical and Electronics Engineers Inc., 2022) Mandal, S.; Prabhakaran, P.A Novel, Transformer-less DC-DC Converter for high voltage gain (HVG) applications is proposed in this paper. The proposed converter consists of an active switched inductor for HVG with reduced voltage and current stress across the components. The proposed converter has a voltage gain of (3D+1) times than that of the conventional boost converter. The proposed converter uses fewer components and provides HVG with relatively small duty ratios. A good feature of the proposed topology is all the switches and intermediate capacitors have equal voltage stress. The proposed converter can support bidirectional operation with wide duty ratio variations. The working principle and steady-state analysis of this converter is explained in detail. Dynamic modelling of the converter is presented, and both voltage and current control operations can be carried out. To validate the theoretical analysis, detailed simulation results are presented. © 2022 IEEE.Item A Novel Bidirectional Modified Zeta Converter with Wide Voltage Conversion Ratio(Institute of Electrical and Electronics Engineers Inc., 2023) Mandal, S.; Prabhakaran, P.A Novel, transformer-less, bidirectional and high-gain DC-DC converter is proposed in this paper, which is apt for the interface between two DC voltage levels in various applications, including microgrids. This converter achieves a wide voltage gain with reduced voltage and current stress across the components. The proposed converter supports bidirectional capability with low components. The proposed converter's operating principle and steady-state analysis are explained in detail for continuous conduction mode (CCM). Dynamic modelling of the converter is presented, and closed-loop controllers are designed. The proposed converter operates in both current and voltage control modes. The design of voltage and current compensators are elaborated. Detailed analysis and simulation results are presented in this paper to validate the theoretical analysis and performance of the proposed converter. © 2023 IEEE.Item A Novel Bidirectional Modified SEPIC Converter with Wide Voltage Conversion Ratio(Institute of Electrical and Electronics Engineers Inc., 2023) Mandal, S.; Prabhakaran, P.A Novel, transformer-less, bidirectional DC-DC Converter based on modified SEPIC topology is proposed in this paper. In the proposed converter, an active switched inductor configuration is incorporated in the conventional SEPIC converter to achieve a wide voltage conversion ratio with reduced voltage and current stress across the components. The proposed converter supports bidirectional buck-boost (BBB) capability with low components. The proposed converter's operating principle and steady-state analysis are explained in detail for continuous conduction mode (CCM). Dynamic modelling of the converter is presented and closed-loop controllers are designed. The proposed converter operates in both current and voltage control modes. The design of voltage and current compensators are detailed in this paper. Detailed analysis and simulation results are presented to validate the theoretical analysis and performance of the proposed converter. © 2023 IEEE.Item A Design and Implementation of a Novel Multi-Stage Ultra High Gain DC-DC Converter with Active LC2D Network(Institute of Electrical and Electronics Engineers Inc., 2023) Mandal, S.; Prabhakaran, P.This paper presents a novel multi-stage ultra-high gain DC-DC converter with minimal components, including a single semiconductor switch. It achieves high voltage gain at lower duty ratios, reducing voltage stress on the switch and diodes. The converter utilizes a network of an active inductor, capacitor, and two diodes, known as LC2D network (also called as active switched inductor capacitor network (SLCN)). The analysis focuses on the converter's performance derived from the n-stage SLCN converter, with emphasis on the basic stage. The compact design makes it suitable for renewable energy, electric vehicles, and fuel cell applications. The working principle and steady-state analysis are explained, supported by simulation results to validate the theoretical analysis. This innovative converter offers exceptional performance and has various applications. © 2023 IEEE.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 Novel High Gain Unidirectional Buck-Boost DC-DC Converter with Active Switched-Inductor Configuration(Institute of Electrical and Electronics Engineers Inc., 2023) Mandal, S.; Prabhakaran, P.A Novel non-isolated buck-boost DC-DC Converter is proposed in this paper for high voltage gain (HVG) applications. The proposed converter has a voltage gain of 2/(1-d) times that of the conventional buck-boost converter and provides this gain with fewer components. An active switched inductor (ASI) is incorporated in the proposed converter, to mitigate voltage and current stress on the components, particularly in the high-voltage section. Apart from HVG in buck-boost mode, the proposed converter provides noninverting output voltage, and continuous input current without using any coupled inductor and transformer. Hence, the proposed converter is compact and is suitable for renewable energy and fuel cell applications. One notable advantage of the proposed topology is the minimized voltage stress experienced by the switches and intermediate capacitors. Detailed explanations are given regarding the working principle and steady-state analysis of this converter. Furthermore, the dynamic modeling of the converter allows for voltage and current control operations, and simulation results are presented to verify the theoretical analysis. © 2023 IEEE.Item A Design and Implementation of a Novel Multi-Stage Ultra High Gain DC-DC Converter with Boost Cell Network(Institute of Electrical and Electronics Engineers Inc., 2023) Mandal, S.; Prabhakaran, P.This paper introduces a novel multi-stage ultrahigh gain DC-DC converter featuring a minimal component count, including a single semiconductor switch. This converter achieves substantial voltage gain even at lower duty ratios, effectively reducing voltage stress on both the switch and diodes. The proposed converter leverages two distinct boost cell configurations, namely the 2LC2D and C2D designs. The 2LC2D boost cell consists of two inductors, one capacitor, and two diodes, collectively forming an active switched inductor capacitor network (SLCN). On the other hand, the C2D boost cell comprises one capacitor and two diodes. The paper primarily investigates the converter's performance within the context of an n-stage SLCN converter, with a particular focus on the fundamental stage. Its compact design renders it well-suited for various applications, including renewable energy, electric vehicles, and fuel cells. The paper provides a comprehensive explanation of the working principle and steady-state analysis, accompanied by simulation results that substantiate the theoretical findings. This innovative converter demonstrates exceptional performance characteristics and exhibits significant potential across a wide spectrum of applications. © 2023 IEEE.Item A Novel Non-Isolated High-Gain Boost DC- DC Converter with Single Switch and Minimum Component Count(Institute of Electrical and Electronics Engineers Inc., 2024) Mandal, S.; Prabhakaran, P.This paper presents a novel non-isolated unidirectional DC-DC converter aimed to achieve substantial voltage gain while minimizing component stress and maintaining a low component count. The converter's architecture amalgamates modified Single-Ended Primary Inductance Converter (SEPIC) and traditional Cuk topologies, employing only a single switch. A comprehensive analysis of the derivation, operational principles, and steady-state characteristics of this novel converter is provided. Additionally, the paper encompasses dynamic modeling of the proposed converter and elucidates the design of closed-loop controllers tailored for current control modes. Extensive analysis and simulation results substantiate the effectiveness and performance of the proposed topology. This innovative converter offers a promising solution for efficient energy transfer, delivering exceptional voltage gain suitable across various applications. © 2024 IEEE.