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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...
In this paper, a novel nine level bi-direction multilevel inverter is proposed, The structure of the main concepts for the use eleven power switch devices to divide input voltage that is replace the traditional circuit using by capacitor. Nine switches and four diodes are required to generate a nine-level output. Additional two switches and inductor will generate an output voltages balance circuit...
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