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FPGA-based Digitally Controlled Isolated Full-Bridge DC-DC Converter with Voltage Doubler (IFBVD)
An isolated full-bridge dc-dc converter with voltage doubler (IFBVD) is mainly used in higher power applications. This paper presents the testing and implementation of a digitally controlled Random pulse width modulated isolated full-bridge DC-DC converters with voltage doubler (IFBVD). Different PWM techniques for full-bridge DC/DC converter are investigated. Field Programmable Gate Array (FPGA) is used to obtain different PWM techniques. It is most commonly used in designing PWM Generator for Power Converter Applications. A comprehensive comparison between the various PWM techniques, including current stress, ripple and efficiency, is presented. Simulation is done using Matlab/Simulink. An experimental setup has been provided to validate the theoretical and simulation results using FPGA control. Experimental results of a 0.5kW, 50kHz prototype are presented.
Keywords
DC-DC Converter, FPGA, Phase Shift, Random PWM, Ripples
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