Mansour Arafa S, Amer Al-Hassan H, El-Kholy Elwy E, Zaky Mohamed S
Electrical Engineering Department, Faculty of Engineering, Menoufia University, Shebin Elkom, 32511, Egypt.
Department of Electrical Engineering, College of Engineering, Northern Border University, Arar, 1321, Saudi Arabia.
Sci Rep. 2022 Jul 15;12(1):12138. doi: 10.1038/s41598-022-16246-8.
In this paper, a new design of a non-isolated high-voltage gain DC/DC converter that operates at a reasonable duty cycle, by merging the dual boost converter with the switched inductor structure, is presented as a solution for the high-conversion ratio requirement. The proposed converter operates in discontinuous-current mode (DCM) with zero current switching for all switches and diodes. Wide duty cycle range operation, high output voltage gain, low switching stress, small switching losses, and high efficiency are achieved efficiently. Operating the converter in DCM can support a wide range of the duty cycle operation, maintain lower voltage stress of all devices, ensure the same current sharing among inductors, make it easy to control, provide more stability, and require a smaller inductor which reduces size and weight of the proposed converter. Moreover, the converter operates with a continuous input current. These features make the converter a good choice for many applications such as photovoltaic, x-ray, fuel cells, etc. To prove the converter's effectiveness, theoretical analysis, project specifications, and operation principles are presented and studied. Experimental results in an open and closed-loop, and a comparison with other recent converters are also introduced to confirm the validity of the proposed converter.
本文提出了一种非隔离式高压增益DC/DC转换器的新设计，通过将双升压转换器与开关电感结构相结合，以合理的占空比运行，作为满足高转换比要求的解决方案。所提出的转换器在断续电流模式（DCM）下运行，所有开关和二极管均实现零电流开关。有效地实现了宽占空比范围运行、高输出电压增益、低开关应力、小开关损耗和高效率。在DCM模式下运行转换器可以支持宽范围的占空比操作，保持所有器件较低的电压应力，确保电感之间的电流均分，易于控制，提供更高的稳定性，并且所需电感较小，从而减小了所提出转换器的尺寸和重量。此外，该转换器以连续输入电流运行。这些特性使该转换器成为光伏、X射线、燃料电池等许多应用的理想选择。为了证明该转换器的有效性，给出并研究了理论分析、项目规格和工作原理。还介绍了开环和闭环的实验结果以及与其他近期转换器的比较，以证实所提出转换器的有效性。
