Browsing by Author "Suraj, G.O."

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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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    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.