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 Novel Bidirectional Modified SEPIC-Cuk Converter with Wide Voltage Conversion Ratio(Institute of Electrical and Electronics Engineers Inc., 2023) Mandal, S.; Prabhakaran, P.The paper proposes a novel transformer-less bidirectional DC-DC converter that achieves ultra-high gain and reduces voltage stress across components. This converter is based on modified SEPIC and CUK topologies, and its derivation, operating principle, and steady-state analysis are presented. The paper also includes dynamic modeling of the converter and the design of closed-loop controllers for voltage and current control modes. Detailed analysis and simulation results are provided to demonstrate the efficacy and performance of the proposed topology. Overall, this innovative converter offers a promising solution for high-efficiency energy transfer with ultra-high voltage gain in various 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.