Faculty Publications
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Item Design and Development of Modular Dual-Input DC-DC Step-Up Converter for Telecom Power Supply(Institute of Electrical and Electronics Engineers Inc., 2021) Kiran, R.; Kalpana, R.A modified modular dual-input dc-dc step-up converter along with a battery charging/discharging bidirectional converter that is suitable for telecom load applications is proposed in this article. The proposed converter has two individual input modules with the three-leg semiactive rectifier connected in parallel at secondary side for achieving constant voltage across the load with reduced circulating power. This results in an advantage of having compact structure with reduced number of components. The proposed converter works under a zero-voltage switching condition, it has favorable advantage such as low switching losses and high efficiency of the system. The complete design and steady-state analysis of the proposed converter utilizing field programmable gate array (FPGA)-based digital control strategy have been investigated in this article. A scaled down laboratory prototype of 1 kW has been developed and the robustness of the proposed converter is validated by extensive test results under variable input voltage and load conditions. © 1972-2012 IEEE.Item An Isolated Dual-Input Half-Bridge DC-DC Boost Converter with Reduced Circulating Power between Input Ports; Convertisseur boosteur DC-DC isolé à double entrée et demi-point avec une puissance de circulation réduite entre les ports d'entrée(2022) Kiran, R.; Kalpana, R.This article addresses a dual-input half-bridge DC-DC converter for proper utilization of renewable energy sources (RESs). The proposed system includes two different variable sources to examine the power distribution in each module, two high-frequency transformers (HFTs), and a three-leg converter (TLC) at secondary. The TLC is connected in parallel structure to gain reduced circulating power between input modules. This results in obtaining a compact design with a minimum number of switches. Complete steady-state analysis and control strategy of the proposed system have been analyzed. Digital closed-loop control has been implemented using the field programmable gate array (FPGA) controller to minimize the complexity of the control strategy. A laboratory prototype has been developed to justify the feasible operation of the proposed converter. Extensive tests result demonstrates the enhanced performance of the proposed system in effective utilization of power from different sources to feed the telecom load. © 2022 IEEE.