| Citation: | XIONG Z Y，YIN J Y，HUO Q H，et al. A high gain DC-DC converter based on switched capacitor and coupled inductor voltage multiplier unit[J]. Journal of Beijing University of Aeronautics and Astronautics，2025，51（8）：2652-2662 （in Chinese） doi: 10.13700/j.bh.1001-5965.2024.0838
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This paper addresses the low port voltage of the photovoltaic array in laser wireless power technology, which requires high-gain DC-DC converters for voltage boosting. The first is a new high-gain DC-DC converter that uses a triple-winding coupled inductor voltage multiplier unit with switching capacitors. By coordinating the windings of the triple-winding coupled inductor with the charge pump, clamping, and voltage multiplier capacitors, the voltage gain is uniformly distributed among the boost units, greatly increasing the converter's voltage gain and lowering the voltage stress on power devices. In addition, the clamping capacitor in the switched capacitor absorbs the energy stored in the coupled inductor's leakage inductance when the power switching device is turned off, preventing the formation of a voltage spike while achieving zero-current turn-on of the power switching device, both of which helps to improve the efficiency of the converter. Then, the working principle and steady-state performance of the proposed converter are analyzed in detail. Ultimately, a prototype and simulation model are developed based on the suggested concept, and simulation and experimentation are used to confirm that the performance analysis and working principle of the suggested converter are accurate.
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