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In this paper, a multistage nonisolated high voltage conversion ratio (VCR) bidirectional dc–dc converter is proposed. The VCR is n times of the conventional buck/boost converter using only $n+ {\text{2}}$ switches. All the switches can achieve full-range zero voltage switching (ZVS) despite the power flow direction. The operating principle, ZVS condition, and design considerations of a four-stage...
A decentralized control strategy with improved droop control is proposed for parallel-connected current-fed bidirectional DC-DC converters to achieve the flexible power architecture and modular design. The step-up or step-down function depends on the power flow direction. An improved droop control strategy is implemented by sensing the high-voltage side (HVS) voltage and low-voltage side (LVS) current...
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