In this paper, a new non-isolated DC-DC converter is proposed. This converter topology is a high step-up boost converter with an extended voltage multiplier cell and a Cuk converter as a series output module. Compared to its high step-up counterpart, the proposed converter has a higher voltage gain. In this converter, an active clamp circuit is used to absorb the energy of leakage inductor, therefore, the ZVS turn on/off for switches and ZCS for diodes are achieved. The voltage stresses on the switches are low, and the reverse-recovery problem of the diodes is eliminated. The operational principle and characteristics of the proposed converter are presented. The analytical and simulated results are validated using a 200 W prototype converter with 20 V input and 400 V output operating at 100 kH.

在本文中，提出了一种新的非隔离式 DC-DC 转换器。这种转换器拓扑是一个高升压转换器，带有一个扩展电压倍增器单元和一个 Cuk 转换器作为串联输出模块。与其高升压对应物相比，所提出的转换器具有更高的电压增益。该转换器采用有源钳位电路吸收漏电感的能量，从而实现开关的ZVS导通/关断和二极管的ZCS。开关上的电压应力很低，消除了二极管的反向恢复问题。介绍了所提出的转换器的工作原理和特性。使用具有 20 V 输入和 400 V 输出、以 100 kH 运行的 200 W 原型转换器对分析和模拟结果进行了验证。