In this study, a coupled inductor (CI)-based high step-up DC–DC converter is presented. The proposed topology is developed from a primitive quadratic boost converter (QBC) structure. A two-phase interleaved QBC structure is obtained by employing multi-winding CIs instead of discrete inductors as the energy storage magnetic element. The voltage gain is further extended by using (i) voltage lift capacitor, (ii) CIs and (iii) voltage multiplier cells. Consequently, the voltage stress on the main switches is reduced to 18.9% of the output voltage. Moreover, interleaving mechanism helps in achieving a smooth input current profile; the input current ripple is only 4.59% of the total input current magnitude. To validate the proposed concept, 18 V/380 V, 150 W prototype converter is constructed and experimented. Under experimentation, the converter delivers the required power to the load at 95% full-load efficiency. Further, under closed-loop condition, the output voltage from the converter is regulated to the required standard value of 380 V DC.

中文翻译：

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具有高电压转换比和平滑输入电流的基于耦合电感的DC-DC转换器

在这项研究中，提出了一种基于耦合电感（CI）的高升压DC-DC转换器。拟议的拓扑是从原始的二次升压转换器（QBC）结构开发的。通过使用多绕组CI代替分立电感器作为储能磁性元件，可以获得两相交错QBC结构。通过使用（i）升压电容器，（ii）CI和（iii）电压倍增器进一步扩大了电压增益。因此，主开关上的电压应力降低到输出电压的18.9％。此外，交错机制有助于实现平滑的输入电流曲线；输入电流纹波仅为总输入电流幅度的4.59％。为了验证所提出的概念，构建并试验了18 V / 380 V，150 W原型转换器。经过实验 转换器以95％的满载效率为负载提供所需的功率。此外，在闭环条件下，转换器的输出电压被调节到所需的380 V DC标准值。