A low-loss, constant-frequency, zero voltage switching (ZVS) modulation strategy for bidirectional buck dc-dc converter, applied to hybrid energy storage system, is proposed in this paper. The synchronous rectification and soft-switching techniques are adopted to reduce the power conversion loss. As the modulation strategy is a software-only solution, there are no additional expenses for the active or passive components. The mathematical model and operation principle of the converter are presented respectivel…
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