Conference Papers

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    Design and development of current source fed full-bridge DC-DC converter for (60V/50A)telecom power supply
    (Institute of Electrical and Electronics Engineers Inc., 2018) Kalpana, R.; Kiran, R.
    This paper addresses a dual input converter (DIC) for telecom power system of 3 kW using digital control algorithm. The proposed system gives an alternative way of fusing the sources of DC in magnetic form, instead of combining in the DC electrical form, by the addition of magnetic flux that is produced in the transformer magnetic core, which works on the principle of flux additivity. A detailed design, operation and control strategy of the proposed dual input isolated full-bridge step down DC-DC converter has been completely evaluated and presented in this paper. A constant frequency phase shifted PWM switching strategy have been preferred for the generation of gate pulses using FPGA controller board. The simulation analysis of the proposed converter has been executed utilizing MATLAB Simulink environment. A prototype for the proposed converter of 1.5 kW has been developed and experimental results are presented to validate the theoretical waveform of the proposed converter. © 2017 IEEE.
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    Digital Control System Based Isolated Totem Pole Converter for Electric Vehicle Onboard Chargers
    (Institute of Electrical and Electronics Engineers Inc., 2025) Das, A.K.; Raushan, R.; Kumar, P.
    The Totem-Pole converter is well-suited for lowpowered electric vehicle (EV) applications. The isolated configurations of such converters provide single-stage power conversion that overcomes the more conversion stages. A robust controller can satisfy the converter operations efficiently for on-board charging applications. In this paper, a modified digital control method for totem-pole PFC cascaded active flyback DC-DC converters functioning in discontinuous conduction mode (DCM) is proposed. The auxiliary switch and clamp capacitor are used to recycle the stored energy in the transformer to reduce the spike voltage. The main purpose of adding PFC is to obtain the input current in phase with the input voltage, keeping total harmonic distortion (THD) low to improve the efficiency of the converter. © 2025 IEEE.