Conference Papers
Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506
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Item A Novel PR Controller with Improved Performance for Single-Phase UPS Inverter(Institute of Electrical and Electronics Engineers Inc., 2021) Prabhakaran, P.; Mohan Krishna, S.M.; Febin, F.D.; Perumal, T.Modern uninterrupted power supplies (UPS) are gaining popularity as they can deliver clean and high-quality power under extreme load condition for sensitive devices (like medical, military and communication equipment). Traditional proportional-integral (PI) based control for UPS system provides high-quality output but suffers from the poor dynamic response. In this paper, a novel proportional resonant (PR) controller is proposed for controlling the output voltage of a single-phase inverter. The proposed controller provides a fast-dynamic response, low or zero steady-state error, and reduced total harmonic distortion (THD). A detailed step by step procedure to design the novel controller is presented based on the specific criteria (like steady-state error, overshoot, etc.). Due to the fast response, the proposed PR controller is also suitable for EV charging applications (specifically to the vehicle to load charging). Simulation and experimental results are presented to validate the feasibility and efficacy of the proposed controller. © 2021 IEEE.Item A Novel Single-Pulse Operated SRM Drive with Improved Performance and Integrated On-board Charging Capability for EVs(Institute of Electrical and Electronics Engineers Inc., 2022) Faheemali, T.; Arun Dominic, D.; Prabhakaran, P.In this paper, a novel single-pulse operated SRM drive with integrated on-board charging capability is proposed. The proposed drive is designed for three modes of operation: motoring (driving), regenerative braking, and grid-to-vehicle (G2V) charging. For motoring and regenerative braking mode, single-pulse control (SPC) is utilized to reduce the switching frequency to fundamental value giving the advantage of re-duced switching losses and core losses. To reduce the torque ripple and improve the efficiency of the drive, modifications in the conventional SPC are incorporated and presented. In the proposed SRM drive, the Cuk converter is utilized as a front-end converter to provide a higher demagnetization voltage, eliminating negative torque production and hence improving the torque-ampere ratio. Furthermore, the bidirectional Cuk converter is utilized to provide variable magnetization voltage for speed control and to achieve power factor correction (PFC) operation during charging mode (G2V mode). As the proposed SRM drive supports integrated on-board charger functionality, it reduces the cost and improves the overall power density of the EV. Detailed analysis and MATLAB simulation results are presented to validate the efficacy of the proposed integrated SRM drive and control scheme. © 2022 IEEE.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 Novel Power Converters for Reconfiguration and Voltage Balancing of Dual Battery Pack Based EV(Institute of Electrical and Electronics Engineers Inc., 2022) Kumar, V.; Prabhakaran, P.; Raj, N.Battery Electric Vehicles predominantly come with a single battery pack. Reliability and limited driving range are the main obstacles to EV market growth. To overcome these, dual battery pack-based EVs are seen as a promising alternative for the future. This paper presents two novel power converters suitable for dual battery pack-based Electric Vehicles. The proposed converters can configure and connect two battery packs in series or parallel or operate with a single battery pack. The output terminals of the proposed converters can be connected directly to the charger terminal during charging or to the motor drive inverter during traction. When the EV is neither in charging mode nor in traction mode, and if there is a voltage imbalance between the two battery packs, proposed converters can transfer power from the battery pack with a higher terminal voltage to the other one. The converters' transfer function is derived using state-space averaging and small-signal modeling to design the converter's controller in the voltage balancing mode. The controller is designed using the K-factor approach. Detailed MATLAB simulations and hardware experiments are presented to validate the efficacy of proposed converters in different operating modes. © 2022 IEEE.Item Single-Phase Single Stage High Gain Six Switch Four-Port Converter(Institute of Electrical and Electronics Engineers Inc., 2022) Reddy, M.R.; Dastagiri Reddy, B.D.; Prabhakaran, P.; Kishan, D.This paper proposes a single-phase single-stage high gain six switch four-port (6S4P) converter with a novel modulation scheme. The four ports are 1) a low voltage DC port 2) a high voltage DC port, 3) AC port1 and 4) AC port2. For effective operation of the proposed converter, novel Rectified Inverse Level-shifted Sinusoidal Pulse Width Modulation (RILSPWM) and Phase-shifted Rectified Level-shifted Sinusoidal Pulse Width Modulation (PRLSPWM) schemes are proposed and employed. The proposed converter along with the modulation scheme achieves high voltage gain for both DC and AC ports, and also the ac ports are operated with different magnitudes and frequencies. Thus, improving the power density and reliability of the proposed converter with reduced cost. The performance of the proposed converter is evaluated in the MATLAB/Simulink environment, and the 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 An Optimal Modulation Schemes for a Family of Single-Stage Three Switch Leg Multi-Port Boost DC-AC Converter(IEEE Computer Society, 2023) Reddy, M.R.N.; Barla, P.C.; Dastagiri Reddy, B.D.; Suraj, G.O.; Prabhakaran, P.; Kishan, D.This paper presents an optimal modulation schemes for a family of single-stage three switch leg multi-port boost (TSLMPB) DC-AC converters. The proposed multi-port DC-AC converter topologies and associated modulation scheme exchange power between multiple DC and AC ports with high voltage gain. Furthermore, the DC ports functioned with diverse voltage levels, while the AC ports can be operated at varying voltage magnitudes and frequencies. The feasibility of the modulation schemes for the TSLMPB DC-AC converters are evaluated in the MATLAB/ Simulink environment, and the results are presented. To validate the performance and efficiency of the TSLMPB DC-AC converters, a 300 W laboratory prototype was developed, and experimental results are presented and discussed. © 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.