The choice of bi-directional dc/dc converter plays a vital role in the battery chargers of electrical vehicles (EVs), In this paper, a bidirectional battery charging and discharging topology without snubber circuitry is proposed. A different frequency operation is performed in step-up and step-down mode to achieve zero voltage switching in both the directions. The battery side converter is selected as a current-fed half bridge boost converter to achieve 2X voltage gain from primary to secondary of transformer. losses of soft switching from full load to no load and vice-versa are identified and rectified by using MATLAB/Simulink for 1KW battery connected system.
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Tomar et al. (2018) studied this question.
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