Browsing by Author "Reddy, M.R."

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    A Novel Topology and Design Methodology for Improved Power Quality of High-Power Charger
    (Institute of Electrical and Electronics Engineers Inc., 2025) Suraj, G.O.; Reddy, M.R.; Dastagiri Reddy, B.D.
    This article introduces a novel topology and design methodology of a high-power charger. The proposed topology integrates a modified 12-pulse Diode Bridge Rectifier (12pDBR) with an interleaved boost converter (IBC) to meet the charging requirements and power quality standards. This results in an efficient charger with a reduced number of components and magnetic ratings compared to its counterparts. The mathematical analysis that highlights the significance of triangular shaping of the output currents of a 12pDBR and its impact on the input current harmonics is presented. Furthermore, the role of overlap angle, which is a function of system inductances, in triangular wave shaping is emphasized. A systematic methodology for the coordinated design of 12pDBR and IBC is proposed. To verify the design, MATLAB/Simulink simulations are conducted, followed by experimental validation using a 1 kW prototype. The proposed topology attains a grid current Total Harmonic Distortion (%iTHD) of 4.9%, a power factor (PF) of 0.97 lag, and a charging current ripple of 2.75% at full load condition. © 1982-2012 IEEE.
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    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.