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A systematic method for developing isolated buck-boost (IBB) converters is proposed in this paper, and single-stage power conversion, soft-switching operation, and high-efficiency performance can be achieved with the proposed family of converters. On the basis of a nonisolated two-switch buck-boost converter, the proposed IBB converters are generated by replacing the dc buck-cell and boost-cell in...
In this paper, a high step-up converter with coupled-inductor and built-in transformer is proposed. Compared with other converters with coupled-inductor, the built-in transformer introduces a new control variable of the voltage gain which improves the design flexibility and conversion efficiency. Thus, low ratio of coupled-inductor can be selected. Input current ripple is reduced so that the input...
A high step-up soft-switching converter based on combination of a dual-active-bridge (DAB) converter and a voltage multiplier is proposed for high efficiency photovoltaic (PV) applications. With dual-phase-shift modulation, zero-voltage-switching (ZVS) can be realized for both primary-side and secondary-side MOSFETs in a wide load range and the reverse recovery problem of rectifier diodes can be eliminated...
A family of isolated resonant converter with voltage multiplier is proposed for high step-up applications. The output voltage is improved significantly by integrating switched-capacitor cells into the secondary-side rectifier of the converter, which benefits to reduce the turns ratio of the transformer. Low voltage-rated switches and diodes with high switching and conduction performances can also...
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