15. Enhanced Isolated Boost DC–DC Converter with Reduced Number of Switches

This chapter documents a new two-switch, isolated boost DC–DC converter. At the point when the field effect transistor (FET) is turned on, the component produces a resonant pulse, which is then filtered by the output LC like a traditional switching converter. In a quasi-resonant converter (QRC), the width and amplitude of the pulse are fixed and the converter operates under variable frequency by using a resonant pulse, the switching element will naturally go into a zero-current state. To better comprehend the operation of this circuit, we can simplify our model slightly and break up its operation into six modes of intervals. High boost DC–DC converters are required to convert low voltages into a steady DC bus voltage. For galvanic isolation, segregated topologies are generally used. As a result, the voltage-fed full-bridge (VFFB) DC–DC converters are appropriate for applications with high step-up voltage gain. Regarding the performance of the proposed converter, a 343 V DC output was constructed with a 50 V DC input and the higher efficiency obtained is 99%. To check the execution of the proposed converter, a simulation model has to be developed by means of MATLAB Simulink. The developed simulation model needs to be examined under resistive loading condition.