A zero voltage switching (ZVS) interleaved high step-up converter with coupled inductor and built-in transformer voltage multiplier cell is introduced in this study. A more flexible design is provided by increasing the voltage conversion ratio by utilising the turns ratios of the coupled inductor and built-in transformer. The ZVS operation of the metal-oxide-semiconductor field-effect transistors (MOSFETs) and absorption of the leakage current are realised through active clamp circuits. Furthermore, the voltage stress across the switching devices is minimised that give rises to implementation of low voltage rated MOSFETs and consequently low conduction losses. Meanwhile, the diode reverse current problem is alleviated by the leakage inductance of the coupled inductor and built-in transformer. All of the abovementioned advantages make the proposed converter as a high efficiency candidate for high current and high step-up applications. Finally, a 600 W, 48–700 V voltage conversion with the conversion efficiency of 97% is fabricated to probe the merits of the proposed converter.

中文翻译：

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交错式高升压ZVS DC-DC转换器，带有耦合电感器和内置变压器，适用于可再生能源系统应用

本研究介绍了一种具有耦合电感器和内置变压器电压倍增器单元的零电压开关（ZVS）交错式高升压转换器。通过利用耦合电感器和内置变压器的匝数比来提高电压转换率，可以提供更灵活的设计。通过有源钳位电路可实现金属氧化物半导体场效应晶体管（MOSFET）的ZVS操作和吸收泄漏电流。此外，开关器件两端的电压应力被最小化，这导致了低压额定MOSFET的实现，从而降低了传导损耗。同时，通过耦合电感器和内置变压器的漏感缓解了二极管反向电流问题。所有上述优点使所提出的转换器成为高电流和高升压应用的高效候选者。最后，制造了600 W，48–700 V的电压转换，转换效率为97％，以探究所提出转换器的优点。