Input parallel–output parallel connected modular nonisolated DC-DC converters with current self-sharing capability operating in discontinuous conduction mode,International Journal of Circuit Theory and Applications

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Input parallel–output parallel connected modular nonisolated DC-DC converters with current self-sharing capability operating in discontinuous conduction mode
International Journal of Circuit Theory and Applications ( IF 1.8 ) Pub Date : 2022-09-08 , DOI: 10.1002/cta.3431
William Jesus de Kremes ₁ , Jessika Melo de Andrade ₁ , Bharatiraja Chokkalingam ₂ , Carlos Henrique Illa Font ₃ , Telles Brunelli Lazzarin ₁

Affiliation

This paper covers the self-sharing analysis of dc-dc nonisolated converters with input parallel–output parallel (IPOP) configuration and operating in discontinuous conduction mode (DCM). The main contribution of the proposed system is its capability of providing self-sharing of the currents on both sides of each individual converter, without average current sharing control, even in the face of parametric variations. This self-balance only occurs for DCM. When the addressed converters operate in continuous conduction mode (CCM), the self-sharing does not occur naturally under parametric differences among them, requiring the use of additional control loops. The use of self-sharing converters in nonisolated converters simplifies the control system, it makes the modular solution being attractive for many applications, and it increases the power range that the DCM converters may be applied. This paper brings the theoretical study of self-sharing of the current mechanism to six basic nonisolated converters operating in DCM. The self-sharing is verified by experimental results, which are obtained from three modules of dc-dc SEPIC converters. Both converters were designed to operate with 200-V input voltage, 125-V output voltage, 1500-W rated power (500 W each module), and switching frequency at 30 kHz.

中文翻译：

输入并联输出并联连接的模块化非隔离式 DC-DC 转换器，具有在不连续导通模式下运行的电流自共享能力

本文介绍了具有输入并行-输出并行 (IPOP) 配置并在不连续导通模式 (DCM) 下运行的 DC-DC 非隔离转换器的自共享分析。所提出的系统的主要贡献是它能够在每个单独转换器的两侧提供电流的自共享，即使在参数变化的情况下也无需平均电流共享控制。这种自我平衡只发生在 DCM 中。当所寻址的转换器以连续导通模式 (CCM) 运行时，由于它们之间的参数差异，自共享不会自然发生，需要使用额外的控制环路。在非隔离转换器中使用自共享转换器简化了控制系统，使模块化解决方案对许多应用具有吸引力，它增加了DCM转换器可以应用的功率范围。本文将电流机制的自共享理论研究引入到在 DCM 中运行的六个基本非隔离转换器。自共享通过实验结果得到验证，实验结果来自三个直流-直流 SEPIC 转换器模块。两个转换器均设计为在 200V 输入电压、125V 输出电压、1500W 额定功率（每个模块 500W）和 30kHz 开关频率下运行。

更新日期：2022-09-08

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